JP2009160953A - POWER OUTPUT DEVICE, ITS CONTROL METHOD, VEHICLE, AND DRIVE DEVICE - Google Patents

Abstract

An object of the present invention is to achieve both the performance of a power storage device and the protection of equipment included in a power output device.
An output limit Wout is set based on a degradation factor D calculated based on a charge / discharge current Ib of the battery and a rated output Woutr (S310 to S330, S390), and an overoutput request flag Fout2 has a value of 1. When (when starting the engine) (S340, S400), when the allowable load LFmax of the booster circuit is equal to or greater than the threshold LFref, an output obtained by adding the predetermined output Wset to the output limit Wout is set as the control output limit Wout * ( S360, S380), when the allowable load LFmax of the booster circuit is less than the threshold LFref, the output limit Wout is set to the control output limit Wout * (S360, S410). Then, the engine and the two motors are controlled within the range of the control output limit Wout *, and the booster circuit is driven and controlled within the range of the allowable load LFmax.
[Selection] Figure 8

Description

  The present invention relates to a power output device, a control method thereof, a vehicle, and a drive device.

Conventionally, in this type of power output device, a battery output request is set based on the engine operating point and motor output set for the required output to the drive shaft, and the set output request is determined by the battery rating. There has been proposed an apparatus that permits an output exceeding the rated output only for a predetermined time set in a short time when the output is exceeded (see, for example, Patent Document 1). In this power output device, the performance of the battery is exhibited by allowing an output exceeding the rated output of the battery, although it is a short time.
JP 2002-58113 A

  Thus, it is considered as one of the important issues to fully demonstrate the performance of the battery included in the power output apparatus. On the other hand, protecting the components provided in the power output apparatus is also considered as one of important issues.

  The main object of the power output device, the control method thereof, the vehicle, and the drive device of the present invention is to achieve both the performance of the power storage device and the protection of the equipment included in the power output device.

  The power output apparatus, the control method thereof, the vehicle, and the drive apparatus of the present invention employ the following means in order to achieve the main object described above.

The first power output device of the present invention comprises:
A power output device including a power output device capable of outputting power to a drive shaft,
Power storage means capable of supplying power to the power output device;
Temperature detecting means for detecting the temperature of the power output device;
A drive allowance setting means for setting a drive allowance that is an allowance of the drive of the power output device based on the detected temperature of the power output device;
A deterioration parameter calculating means for calculating a deterioration parameter, which is a parameter assumed to start deterioration of the power storage means when a first predetermined value is exceeded, based on a current input to and output from the power storage means;
When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated An output that sets an output smaller than the rated output as an output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value when the deterioration parameter exceeds the second predetermined value. Limit setting means,
When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, the output is within the set output limit range and within the set allowable drive range. The device for controlling the power output is controlled, and when the excess output request is made and the set allowable drive level is greater than or equal to a predetermined level, it is within a predetermined excess output range exceeding the set output limit and the set The power output device is controlled within a range of allowable drive, and when the excess output request is made and the set allowable drive is less than the predetermined range, the output limit is within the set range. And control means for controlling the power output device within the set allowable drive range;
It is a summary to provide.

  In the first power output apparatus of the present invention, based on the current input to and output from the power storage means, a deterioration parameter that is a parameter that is assumed to start deterioration of the power storage means when the first predetermined value is exceeded. When the calculated deterioration parameter is in the first state where the calculated deterioration parameter is less than or equal to the second predetermined value smaller than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated deterioration parameter is When the second state exceeds the predetermined value of 2, an output smaller than the rated output is set as the output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value. Thereby, it is possible to prevent the deterioration parameter from exceeding the first predetermined value. The power output device is set within the output limit range and based on the temperature of the power output device when an excessive output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made. The power output device is controlled within a range of allowable drive, which is the allowable drive. In addition, when the excess output request is made and the allowable drive level is greater than or equal to a predetermined level, the power output device is controlled within a predetermined excessive output range exceeding the output limit and within the allowable drive range. Thereby, the performance of the power storage means can be further exhibited. Further, when the excess output request is made and the allowable drive level is less than a predetermined level, the power output device is controlled within the range of the output limit and within the allowable drive range. As a result, the power output device can be more appropriately protected as compared with a device that controls the power output device within a predetermined excess output range. As described above, it is possible to achieve both the performance of the power storage device and the protection of the power output device.

  In the first power output apparatus of the present invention, the power output device can output power to the internal combustion engine, a first electric motor capable of outputting power to the output shaft of the internal combustion engine, and the drive shaft. Connected to a second motor, a low voltage system to which the power storage means is connected, and a high voltage system to which the drive circuit of the first motor and a drive circuit of the second motor are connected. High voltage system voltage adjusting means for adjusting the voltage, and the excess output request is a request made when the internal combustion engine is motored and started by the first electric motor. You can also

  In the first power output device of the present invention having the internal combustion engine, the first electric motor, the second electric motor, and the high voltage system voltage adjusting means, the excess output request is generated when the internal combustion engine is started. A start excess output request made and a drive excess output request made when a predetermined large driving force is required for the drive shaft, and the control means includes the start excess output request and the drive excess output. When the request is not made, the power output device is controlled within the set output limit range, and when the start excess output request is made and in the first state, the drive excess output When the request is made, the power output device is controlled within the range of the predetermined excess output or the set output limit based on whether or not the set allowable drive level is a predetermined level or more, When the start excess output request is not made in the second state, the power output device is controlled within the set output limit range regardless of whether the drive excess output request is made or not. It can also be a means. In this way, when the excessive output for start-up is requested and the allowable drive level is not less than a predetermined level, the internal combustion engine can be started quickly while sufficiently responding to the drive request. In addition, when the excessive drive output request is made in the first state and the allowable drive level is greater than or equal to a predetermined level, the drive request can be sufficiently met. Furthermore, when the excessive output for start-up is not requested in the second state, it is possible to suppress discharge with high power from the power storage means, and to suppress an increase in deterioration parameters.

  Further, in the first power output device of the present invention comprising an internal combustion engine, a first electric motor, a second electric motor, and a high voltage system voltage adjusting means, the temperature detecting means is the high voltage system voltage adjusting means. The drive allowable level setting means is a means for setting the drive allowable level of the high voltage system voltage adjusting means, and the control means is within a range of the set drive allowable level. The high voltage system voltage adjusting means may be a means for controlling.

  Furthermore, in the first power output device of the present invention having an internal combustion engine, a first electric motor, a second electric motor, and a high voltage system voltage adjusting means, the output shaft of the internal combustion engine, the drive shaft, and the first A three-axis power input / output means connected to three shafts of the rotating shaft of the motor 1 and for inputting / outputting power to / from the remaining shafts based on power input / output to / from any two of the three shafts; It can also be provided.

  In the first power output apparatus of the present invention, when the detected temperature of the power output device is higher than a predetermined temperature, the drive allowance level setting means tends to decrease as the temperature of the power output device increases. It is also possible to use a means for setting the drive tolerance. If it carries out like this, the excessive temperature rise of the apparatus for power output can be suppressed.

  In the first power output apparatus of the present invention, the power storage means may be a lithium ion secondary battery.

The second power output device of the present invention is:
A power output device including a power output device capable of outputting power to a drive shaft,
Power storage means capable of supplying power to the power output device;
Temperature detecting means for detecting the temperature of the power output device;
A deterioration parameter calculating means for calculating a deterioration parameter, which is a parameter assumed to start deterioration of the power storage means when a first predetermined value is exceeded, based on a current input to and output from the power storage means;
When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated An output that sets an output smaller than the rated output as an output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value when the deterioration parameter exceeds the second predetermined value. Limit setting means,
When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, it is based on the detected temperature of the power output device within the set output limit range. The power output device is controlled within a drive limit range, and when the excess output request is made, when the detected temperature of the power output device is equal to or lower than a predetermined temperature, the predetermined output limit is exceeded. The power output device is controlled within an excess output range and within the drive limit range, and the detected temperature of the power output device exceeds a predetermined temperature when the excess output request is made Control means for controlling the power output device within the set output limit range and sometimes within the drive limit range,
It is a summary to provide.

  In the second power output apparatus of the present invention, based on the current input to and output from the power storage means, a deterioration parameter that is a parameter that is assumed to start deterioration of the power storage means when the first predetermined value is exceeded. When the calculated deterioration parameter is in the first state where the calculated deterioration parameter is less than or equal to the second predetermined value smaller than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated deterioration parameter is When the second state exceeds the predetermined value of 2, an output smaller than the rated output is set as the output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value. Thereby, it is possible to prevent the deterioration parameter from exceeding the first predetermined value. When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, the power output is within the output limit range and the drive limit range based on the temperature of the power output device. Control equipment. Further, when the temperature of the power output device is equal to or lower than a predetermined temperature when the excess output request is made, the power output device is controlled within a predetermined excess output range exceeding the output limit and within a drive limit range. Thereby, the performance of the power storage means can be further exhibited. Further, if the temperature of the power output device exceeds a predetermined temperature when the excess output request is made, the power output device is controlled within the output limit range and the drive limit range. Thereby, the excessive temperature rise of the apparatus for power output can be suppressed, and the apparatus for power output can be protected more appropriately. As described above, it is possible to achieve both the performance of the power storage device and the protection of the power output device.

  The vehicle of the present invention is the first or second power output device of the present invention according to any one of the above-described aspects, that is, a power output device that basically includes a power output device capable of outputting power to the drive shaft. A power storage means capable of supplying power to the power output device, a temperature detection means for detecting a temperature of the power output device, and the power output based on the detected temperature of the power output device. Based on a drive allowable level setting means for setting a drive allowable level, which is a level that allows the drive of the electrical equipment, and a current input / output to / from the power storage means, when the first predetermined value is exceeded, A deterioration parameter calculating means for calculating a deterioration parameter that is a parameter assumed to start deterioration, and a first state in which the calculated deterioration parameter is equal to or less than a second predetermined value that is smaller than the first predetermined value. The storage The rated output of the means is set to the output limit of the power storage means, and when the calculated deterioration parameter exceeds the second predetermined value, the deterioration parameter does not exceed the first predetermined value. Output limit setting means for setting an output smaller than the rated output as the output limit of the power storage means, and an excess output request that is a request for discharge from the power storage means with power exceeding the set output limit is made. If not, the power output device is controlled within the set output limit range and within the set drive allowance range, and the set drive allowance level is set when the excess output request is made. When it is above a predetermined level, the power output device is controlled within a predetermined excess output range exceeding the set output limit and within a set allowable drive range. When the excess output request is made, if the set allowable drive level is less than the predetermined level, the power output device is within the set output limit range and within the set allowable drive range. A power output device comprising a control means for controlling the power, a power output device comprising a power output device capable of outputting power to the drive shaft, and a power storage means capable of supplying power to the power output device; Based on the temperature detection means for detecting the temperature of the power output device and the current input to and output from the power storage means, a parameter that is assumed to start deterioration of the power storage means when a first predetermined value is exceeded. Deterioration parameter calculating means for calculating a deterioration parameter, and when the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is smaller than the first predetermined value, The rated output of the means is set to the output limit of the power storage means, and when the calculated deterioration parameter exceeds the second predetermined value, the deterioration parameter does not exceed the first predetermined value. Output limit setting means for setting an output smaller than the rated output as the output limit of the power storage means, and an excess output request that is a request for discharge from the power storage means with power exceeding the set output limit is made. If not, the power output device is controlled within the set output limit range and within the drive limit range based on the detected temperature of the power output device, and when the excess output request is made, When the detected temperature of the power output device is equal to or lower than a predetermined temperature, the power output is within a predetermined excess output range exceeding the set output limit and within the drive limit range. When the temperature of the detected power output device exceeds a predetermined temperature when the excess output request is made, and within the set output limit range and the drive limit range And a control means for controlling the power output device. The power output device is mounted, and the axle is connected to the drive shaft.

  Since the vehicle according to the present invention is equipped with the first or second power output device of the present invention according to any one of the above-described aspects, the effect of the power output device of the present invention, for example, the performance of the power storage device is demonstrated. It is possible to achieve the same effect as that capable of achieving both protection of the power output device.

The first drive device of the present invention comprises:
A drive device that is used together with a power storage means to drive a drive shaft,
A power output device capable of receiving power from the power storage means and outputting power to the drive shaft;
Temperature detecting means for detecting the temperature of the power output device;
A drive allowance setting means for setting a drive allowance that is an allowance of the drive of the power output device based on the detected temperature of the power output device;
A deterioration parameter calculating means for calculating a deterioration parameter, which is a parameter assumed to start deterioration of the power storage means when a first predetermined value is exceeded, based on a current input to and output from the power storage means;
When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated An output that sets an output smaller than the rated output as an output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value when the deterioration parameter exceeds the second predetermined value. Limit setting means,
When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, the output is within the set output limit range and within the set allowable drive range. The device for controlling the power output is controlled, and when the excess output request is made and the set allowable drive level is greater than or equal to a predetermined level, it is within a predetermined excess output range exceeding the set output limit and the set The power output device is controlled within a range of allowable drive, and when the excess output request is made and the set allowable drive is less than the predetermined range, the output limit is within the set range. And control means for controlling the power output device within the set allowable drive range;
It is a summary to provide.

  In the first drive device of the present invention, based on the current input to and output from the power storage means, a deterioration parameter that is a parameter that is assumed to start deterioration of the power storage means when the first predetermined value is exceeded is calculated. When the calculated deterioration parameter is in the first state that is less than or equal to the second predetermined value smaller than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated deterioration parameter is the second When the second state exceeds the predetermined value, an output smaller than the rated output is set as the output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value. Thereby, it is possible to prevent the deterioration parameter from exceeding the first predetermined value. The power output device is set within the output limit range and based on the temperature of the power output device when an excessive output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made. The power output device is controlled within a range of allowable drive, which is the allowable drive. In addition, when the excess output request is made and the allowable drive level is greater than or equal to a predetermined level, the power output device is controlled within a predetermined excessive output range exceeding the output limit and within the allowable drive range. Thereby, the performance of the power storage means can be further exhibited. Further, when the excess output request is made and the allowable drive level is less than a predetermined level, the power output device is controlled within the range of the output limit and within the allowable drive range. As a result, the power output device can be more appropriately protected as compared with a device that controls the power output device within a predetermined excess output range. As described above, it is possible to achieve both the performance of the power storage device and the protection of the power output device.

The second drive device of the present invention is:
A drive device that is used together with a power storage means to drive a drive shaft,
A power output device capable of receiving power from the power storage means and outputting power to the drive shaft;
Temperature detecting means for detecting the temperature of the power output device;
A deterioration parameter calculating means for calculating a deterioration parameter, which is a parameter assumed to start deterioration of the power storage means when a first predetermined value is exceeded, based on a current input to and output from the power storage means;
When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated An output that sets an output smaller than the rated output as an output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value when the deterioration parameter exceeds the second predetermined value. Limit setting means,
When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, it is based on the detected temperature of the power output device within the set output limit range. The power output device is controlled within a drive limit range, and when the excess output request is made, when the detected temperature of the power output device is equal to or lower than a predetermined temperature, the predetermined output limit is exceeded. The power output device is controlled within an excess output range and within the drive limit range, and the detected temperature of the power output device exceeds a predetermined temperature when the excess output request is made Control means for controlling the power output device within the set output limit range and sometimes within the drive limit range,
It is a summary to provide.

  In the second drive device of the present invention, based on the current input / output to / from the power storage means, a deterioration parameter that is a parameter that is assumed to start deterioration of the power storage means when the first predetermined value is exceeded is calculated. When the calculated deterioration parameter is in the first state that is less than or equal to the second predetermined value smaller than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated deterioration parameter is the second When the second state exceeds the predetermined value, an output smaller than the rated output is set as the output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value. Thereby, it is possible to prevent the deterioration parameter from exceeding the first predetermined value. When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, the power output is within the output limit range and the drive limit range based on the temperature of the power output device. Control equipment. Further, when the temperature of the power output device is equal to or lower than a predetermined temperature when the excess output request is made, the power output device is controlled within a predetermined excess output range exceeding the output limit and within a drive limit range. Thereby, the performance of the power storage means can be further exhibited. Further, if the temperature of the power output device exceeds a predetermined temperature when the excess output request is made, the power output device is controlled within the output limit range and the drive limit range. Thereby, the excessive temperature rise of the apparatus for power output can be suppressed, and the apparatus for power output can be protected more appropriately. As described above, it is possible to achieve both the performance of the power storage device and the protection of the power output device.

The control method of the first power output device of the present invention is:
A power output device control method comprising: a power output device capable of outputting power to a drive shaft; and a power storage means capable of supplying power to the power output device,
(A) Based on the temperature of the power output device, a drive allowable level is set that allows the power output device to be driven,
(B) Based on the current input to and output from the power storage means, calculate a deterioration parameter that is a parameter that is assumed to start the deterioration of the power storage means when a first predetermined value is exceeded,
(C) When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, When the calculated degradation parameter is in the second state exceeding the second predetermined value, an output smaller than the rated output is used to limit the output of the power storage means so that the degradation parameter does not exceed the first predetermined value. Set,
(D) When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, a range within the set output limit and within the set allowable drive range The power output device is controlled within a predetermined excess output range exceeding the set output limit when the set allowable drive level is not less than a predetermined level when the excess output request is made, and The power output device is controlled within the set allowable drive range, and the set output limit is set when the set allowable drive level is less than the predetermined level when the excess output request is made. And controlling the power output device within the range of the set allowable driving range,
This is the gist.

  In the control method for the first power output apparatus of the present invention, the parameter is assumed to start the deterioration of the power storage means when the first predetermined value is exceeded based on the current input to and output from the power storage means. When the deterioration parameter is calculated and the calculated deterioration parameter is in a first state where the calculated deterioration parameter is equal to or less than a second predetermined value smaller than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated deterioration When the parameter is in the second state exceeding the second predetermined value, an output smaller than the rated output is set as the output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value. Thereby, it is possible to prevent the deterioration parameter from exceeding the first predetermined value. The power output device is set within the output limit range and based on the temperature of the power output device when an excessive output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made. The power output device is controlled within a range of allowable drive, which is the allowable drive. In addition, when the excess output request is made and the allowable drive level is greater than or equal to a predetermined level, the power output device is controlled within a predetermined excessive output range exceeding the output limit and within the allowable drive range. Thereby, the performance of the power storage means can be further exhibited. Further, when the excess output request is made and the allowable drive level is less than a predetermined level, the power output device is controlled within the range of the output limit and within the allowable drive range. As a result, the power output device can be more appropriately protected as compared with a device that controls the power output device within a predetermined excess output range. As described above, it is possible to achieve both the performance of the power storage device and the protection of the power output device.

The control method of the second power output device of the present invention is:
A power output device control method comprising: a power output device capable of outputting power to a drive shaft; and a power storage means capable of supplying power to the power output device,
(A) Based on the current input to and output from the power storage means, calculate a deterioration parameter, which is a parameter that is assumed to start deterioration of the power storage means when a first predetermined value is exceeded,
(B) When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, When the calculated degradation parameter is in the second state exceeding the second predetermined value, an output smaller than the rated output is used to limit the output of the power storage means so that the degradation parameter does not exceed the first predetermined value. Set,
(C) Based on the temperature within the set output limit and the temperature of the power output device when an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made The power output device is controlled within a drive limit range, and when the excess output request is made, when the temperature of the power output device is equal to or lower than a predetermined temperature, a predetermined excess output exceeding the set output limit The power output device is controlled within the range of the drive limit and within the drive restriction range, and the set output is output when the temperature of the power output device exceeds a predetermined temperature when the excess output request is made. Controlling the power output device within a limit range and within the drive limit range;
This is the gist.

  In the control method for the second power output apparatus of the present invention, the parameter is assumed to start the deterioration of the power storage means when the first predetermined value is exceeded based on the current input to and output from the power storage means. When the deterioration parameter is calculated and the calculated deterioration parameter is in a first state where the calculated deterioration parameter is equal to or less than a second predetermined value smaller than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated deterioration When the parameter is in the second state exceeding the second predetermined value, an output smaller than the rated output is set as the output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value. Thereby, it is possible to prevent the deterioration parameter from exceeding the first predetermined value. When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, the power output is within the output limit range and the drive limit range based on the temperature of the power output device. Control equipment. Further, when the temperature of the power output device is equal to or lower than a predetermined temperature when the excess output request is made, the power output device is controlled within a predetermined excess output range exceeding the output limit and within a drive limit range. Thereby, the performance of the power storage means can be further exhibited. Further, if the temperature of the power output device exceeds a predetermined temperature when the excess output request is made, the power output device is controlled within the output limit range and the drive limit range. Thereby, the excessive temperature rise of the apparatus for power output can be suppressed, and the apparatus for power output can be protected more appropriately. As described above, it is possible to achieve both the performance of the power storage device and the protection of the power output device.

  Next, the best mode for carrying out the present invention will be described using examples.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 according to an embodiment of the present invention, and FIG. 2 is a configuration diagram showing an outline of the configuration of an electric drive system including motors MG1 and MG2. As shown in FIG. 1, the hybrid vehicle 20 according to the embodiment includes an engine 22, a three-shaft power distribution and integration mechanism 30 connected to a crankshaft 26 as an output shaft of the engine 22 via a damper 28, A motor MG1 capable of generating electricity connected to the distribution integration mechanism 30, a motor MG2 connected to a ring gear shaft 32a as a drive shaft connected to the power distribution integration mechanism 30 via a reduction gear 35, and a direct current to an alternating current Inverters 41 and 42 that can be converted to and supplied to the motors MG1 and MG2, a booster circuit 55 that converts the voltage of the power from the battery 50 and can be supplied to the inverters 41 and 42, a battery 50 and a booster circuit 55, And a hybrid electronic control unit 70 for controlling the entire vehicle.

  The engine 22 is an internal combustion engine that outputs power using a hydrocarbon-based fuel such as gasoline or light oil. The engine electronic control unit (hereinafter referred to as engine ECU) 24 performs fuel injection control, ignition control, and intake air amount adjustment. Under control of operation such as control. The engine ECU 24 receives signals from various sensors that detect the operating state of the engine 22, for example, a crank position from a crank position sensor (not shown) that detects the crank angle of the crankshaft 26 of the engine 22. The engine ECU 24 is in communication with the hybrid electronic control unit 70, controls the operation of the engine 22 by a control signal from the hybrid electronic control unit 70, and, if necessary, transmits data related to the operating state of the engine 22 to the hybrid electronic control. Output to unit 70. The engine ECU 24 also calculates the rotational speed of the crankshaft 26, that is, the rotational speed Ne of the engine 22, based on a crank position from a crank position sensor (not shown).

  The power distribution and integration mechanism 30 includes an external gear sun gear 31, an internal gear ring gear 32 arranged concentrically with the sun gear 31, a plurality of pinion gears 33 that mesh with the sun gear 31 and mesh with the ring gear 32, A planetary gear mechanism is provided that includes a carrier 34 that holds a plurality of pinion gears 33 so as to rotate and revolve, and that performs differential action using the sun gear 31, the ring gear 32, and the carrier 34 as rotational elements. In the power distribution and integration mechanism 30, the crankshaft 26 of the engine 22 is connected to the carrier 34, the motor MG1 is connected to the sun gear 31, and the reduction gear 35 is connected to the ring gear 32 via the ring gear shaft 32a. When functioning as a generator, power from the engine 22 input from the carrier 34 is distributed according to the gear ratio between the sun gear 31 side and the ring gear 32 side, and when the motor MG1 functions as an electric motor, the engine input from the carrier 34 The power from 22 and the power from the motor MG1 input from the sun gear 31 are integrated and output to the ring gear 32 side. The power output to the ring gear 32 is finally output from the ring gear shaft 32a to the drive wheels 63a and 63b of the vehicle via the gear mechanism 60 and the differential gear 62.

As shown in FIG. 2, each of the motor MG1 and the motor MG2 is configured as a well-known synchronous generator motor including a rotor having a permanent magnet attached to an outer surface and a stator wound with a three-phase coil. . The inverters 41 and 42 include six transistors T11 to T16 and T21 to 26, and six diodes D11 to D16 and D21 to D26 connected in parallel to the transistors T11 to T16 and T21 to T26 in the reverse direction. Yes. Two transistors T11 to T16 and T21 to T26 are arranged in pairs so that each of the inverters 41 and 42 becomes a source side and a sink side with respect to the positive electrode bus 54a and the negative electrode bus 54b shared by the power line 54. Each of the three-phase coils (U-phase, V-phase, W-phase) of the motors MG1, MG2 is connected to each connection point between the paired transistors. Therefore, a rotating magnetic field is formed in the three-phase coil by controlling the ratio of the on-time of the transistors T11 to T16 and T21 to T26 that make a pair while a voltage is acting between the positive electrode bus 54a and the negative electrode bus 54b. The motors MG1, MG2 can be driven to rotate. Since the inverters 41 and 42 share the positive bus 54a and the negative bus 54b, the electric power generated by either the motor MG1 or MG2 can be supplied to another motor. A smoothing capacitor 57 is connected to the positive bus 54a and the negative bus 54b. The motors MG1 and MG2 are both driven and controlled by a motor electronic control unit (hereinafter referred to as a motor ECU) 40. The motor ECU 40 detects signals necessary for driving and controlling the motors MG1 and MG2, such as signals from rotational position detection sensors 43 and 44 that detect the rotational positions of the rotors of the motors MG1 and MG2, and current sensors (not shown). The phase current applied to the motors MG1 and MG2 is input, and the motor ECU 40 outputs switching control signals to the transistors T11 to T16 and T21 to T26 of the inverters 41 and 42. The motor ECU 40 is in communication with the hybrid electronic control unit 70, controls the driving of the motors MG1 and MG2 by a control signal from the hybrid electronic control unit 70, and, if necessary, data on the operating state of the motors MG1 and MG2. Output to the hybrid electronic control unit 70. The motor ECU 40 determines the rotational speeds Nm1, Nm of the motors MG1, MG2 based on signals from the rotational position detection sensors 43, 44.
2 is also calculated.

  As shown in FIG. 2, the booster circuit 55 includes two transistors T31 and T32, two diodes D31 and D32 connected in parallel to the transistors T31 and T32 in the reverse direction, and a reactor L. The two transistors T31 and T32 are connected to the positive bus 54a and the negative bus 54b of the inverters 41 and 42, respectively, and the reactor L is connected to the connection point. Further, the positive terminal and the negative terminal of the battery 50 are connected to the reactor L and the negative bus 54 b via the system main relay 56, respectively. Therefore, by turning on / off the transistors T31 and T32, the voltage of the DC power of the battery 50 is boosted and supplied to the inverters 41 and 42, or the DC voltage acting on the positive bus 54a and the negative bus 54b is lowered. The battery 50 can be charged. A smoothing capacitor 58 is connected to the reactor L and the negative electrode bus 54b. Hereinafter, the power line 54 side of the booster circuit 55 is referred to as a high voltage system, and the battery 50 side of the booster circuit 55 is referred to as a low voltage system.

  The battery 50 is configured as a lithium ion secondary battery, and is managed by a battery electronic control unit (hereinafter referred to as a battery ECU) 52. The battery ECU 52 is attached to a signal necessary for managing the battery 50, for example, an inter-terminal voltage Vb from the voltage sensor 51a installed between the terminals of the battery 50, and an electric power line connected to the output terminal of the battery 50. The charging / discharging current Ib from the received current sensor 51b, the battery temperature Tb from the temperature sensor 51c attached to the battery 50, and the like are input, and data on the state of the battery 50 is electronically controlled by communication as necessary. Output to unit 70. Further, the battery ECU 52 calculates the remaining capacity SOC based on the integrated value of the charging / discharging current Ib detected by the current sensor 51b in order to manage the battery 50, and sets the input / output limits Win and Wout of the battery 50. It is. In the embodiment, the input / output limit Win of the battery 50 is set by multiplying the basic value Wintmp based on the battery temperature Tb by the input limit correction coefficient based on the remaining capacity SOC of the battery 50. In the embodiment, the output limit Wout of the battery 50 is obtained by multiplying the basic value Wouttmp based on the battery temperature Tb by the output limiting correction coefficient based on the remaining capacity SOC of the battery 50 (hereinafter referred to as the rated output Woutr). Thus, it is set by correcting based on the deterioration factor D as necessary. FIG. 3 shows an example of the relationship between the battery temperature Tb and the basic value Wouttmp, and FIG. 4 shows an example of the relationship between the remaining capacity SOC of the battery 50 and the output limiting correction coefficient. Further, the deterioration factor D is a parameter that is assumed to start deterioration of the battery 50 when the reference value Dmax is exceeded. In the embodiment, the following equation (1) or equation (1) is used by using the charge / discharge current Ib. The calculation is performed according to the equation (2) obtained from the equation (2). In formula (1), “α” and “β” are parameters that depend on the battery temperature Tb and the remaining capacity SOC, and can be determined by experiments or the like. In the equation (2), “κ” is a parameter based on the parameters α and β, that is, a parameter depending on the battery temperature Tb and the remaining capacity SOC, and can be determined by an experiment or the like. Hereinafter, the setting of the output limit Wout of the battery 50 will be described.

dD / dt + α ・ D = β ・ Ib (1)
D = κ ・ ∫Ib ・ dt (2)

  The battery 50 is configured as a lithium ion battery. However, when this lithium ion secondary battery is continuously discharged by a large current, the voltage Vb between the terminals is at the lower limit of the voltage range in which the battery performance can be sufficiently exerted. It has been clarified that even when the voltage is higher than a certain lower limit voltage Vbmin, the battery 50 starts to deteriorate at a certain timing and the inter-terminal voltage Vb starts to decrease relatively steeply. This is shown in FIG. Hereinafter, the timing at which the inter-terminal voltage Vb starts to decrease relatively steeply is referred to as deterioration start timing. In the embodiment, in consideration of such characteristics of the lithium ion secondary battery, it is assumed that the deterioration of the battery 50 starts when the deterioration start timing is reached. This deterioration start timing corresponds to the timing when the above-described deterioration factor D exceeds the reference value Dmax. By the way, the deterioration factor D is calculated as the product of the parameter κ and the integrated value of the charging / discharging current Ib as shown in the equation (2), so that the battery 50 continuously discharges with a large current. The value becomes so large that the battery 50 is charged and gradually decreases when the battery 50 is being charged. Therefore, in the embodiment, in consideration of the characteristics of the deterioration factor D, the rated output Woutr is set to the output limit Wout of the battery 50 when the deterioration factor D is equal to or less than the limit start threshold (control target value) Dtag smaller than the reference value Dmax. When the degradation factor D is larger than the limit start threshold Dtag, the output limit Wout of the battery 50 is set by the equation (3) using the rated output Woutr, the control start threshold Dtag, and the degradation factor D. Expression (3) is an expression of feedback control for canceling the deviation between the deterioration factor D and the control start threshold value Dtag. In Expression (3), “Kp” in the second term on the right side is the gain of the proportional term, “Ki” in the third term on the right side is the gain of the integral term. “Kp” and “Ki” can be determined by experiment or the like so that the deterioration factor D does not exceed the reference value Dmax without making the output limit Wout of the battery 50 as small as possible. By setting the output limit Wout of the battery 50 in this way, the deterioration factor D can be prevented from exceeding the reference value Dmax. That is, the deterioration start timing can be prevented. FIG. 6 shows an example of how the output limit Wout of the battery 50 thus set changes with time. As shown in FIG. 6, the output limit Wout of the battery 50 is set to the rated output Woutr when the deterioration factor D is equal to or less than the limit start threshold Dtag, and after the deterioration factor D exceeds the limit start threshold Dtag, the deterioration factor D is The deterioration factor D is set so as to become smaller as the deterioration factor D does not exceed the reference value Dmax.

  Wout = Woutr + Kp ・ (Dtag-D) + Ki ・ ∫ (Dtag-D) ・ dt (3)

  The hybrid electronic control unit 70 is configured as a microprocessor centered on the CPU 72, and in addition to the CPU 72, a ROM 74 for storing processing programs, a RAM 76 for temporarily storing data, an input / output port and communication not shown. And a port. The hybrid electronic control unit 70 includes a temperature Tup of the booster circuit 55 from the temperature sensor 55a (for example, the temperature of the reactor L) and a voltage of the capacitor 57 from the voltage sensor 57a (hereinafter referred to as a high voltage system voltage VH). , The voltage of the capacitor 58 from the voltage sensor 58a, the ignition signal from the ignition switch 80, the shift position SP from the shift position sensor 82 that detects the operation position of the shift lever 81, and the accelerator pedal position that detects the depression amount of the accelerator pedal 83 The accelerator opening Acc from the sensor 84, the brake pedal position BP from the brake pedal position sensor 86 that detects the depression amount of the brake pedal 85, the vehicle speed V from the vehicle speed sensor 88, and the like are input via the input port. From the hybrid electronic control unit 70, a switching control signal to the transistors T31 and T32 of the booster circuit 55, a drive signal to the system main relay 56, and the like are output via an output port. As described above, the hybrid electronic control unit 70 is connected to the engine ECU 24, the motor ECU 40, and the battery ECU 52 via the communication port, and exchanges various control signals and data with the engine ECU 24, the motor ECU 40, and the battery ECU 52. ing.

The hybrid vehicle 20 of the embodiment thus configured calculates the required torque to be output to the ring gear shaft 32a as the drive shaft based on the accelerator opening Acc and the vehicle speed V corresponding to the depression amount of the accelerator pedal 83 by the driver. Then, the operation of the engine 22, the motor MG1, and the motor MG2 is controlled so that the required power corresponding to the required torque is output to the ring gear shaft 32a. As operation control of the engine 22, the motor MG1, and the motor MG2, the operation of the engine 22 is controlled so that power corresponding to the required power is output from the engine 22, and all of the power output from the engine 22 is the power distribution and integration mechanism 30. Torque conversion operation mode for driving and controlling the motor MG1 and the motor MG2 so that the torque is converted by the motor MG1 and the motor MG2 and output to the ring gear shaft 32a, and the required power and the power required for charging and discharging the battery 50. The engine 22 is operated and controlled so that suitable power is output from the engine 22, and all or part of the power output from the engine 22 with charging / discharging of the battery 50 is the power distribution and integration mechanism 30, the motor MG1, and the motor. The required power is converted to the ring gear shaft 32 with torque conversion by MG2. Charge / discharge operation mode in which the motor MG1 and the motor MG2 are driven and controlled to be output to each other, and a motor operation mode in which the operation of the engine 22 is stopped and the power corresponding to the required power from the motor MG2 is output to the ring gear shaft 32a. and so on. The torque conversion operation mode and the charge / discharge operation mode are modes in which the engine 22 and the motors MG1, MG2 are controlled so that the required power is output to the ring gear shaft 32a with the operation of the engine 22. Since there is no difference in the control, both are hereinafter referred to as the engine operation mode.

  Next, the operation of the hybrid vehicle 20 of the embodiment configured as described above, particularly the operation at the time of drive control based on the output management of the battery 50 will be described. FIG. 7 is a flowchart showing an example of a drive control routine executed by the hybrid electronic control unit 70 of the embodiment. FIG. 8 is a diagram for managing the control output limit Wout * of the battery 50 used for such drive control. 4 is a flowchart showing an example of an output management routine executed by a battery ECU 52. Both routines are repeatedly executed every predetermined time (for example, every several milliseconds). Hereinafter, drive control will be described first, and then management of the output limit Wout of the battery 50 used in drive control will be described.

  When the drive control routine is executed, first, the CPU 72 of the hybrid electronic control unit 70 first determines the accelerator opening Acc from the accelerator pedal position sensor 84, the vehicle speed V from the vehicle speed sensor 88, the rotational speed Ne of the engine 22, the motor MG1. , MG2 rotation speeds Nm1, Nm2, output limit Wout * for control of battery 50, and temperature Tup of booster circuit 55 from temperature sensor 55a are input (step S100). Here, the rotation speed Ne of the engine 22 is calculated based on a signal from a crank position sensor (not shown) and is input from the engine ECU 24 by communication. Further, the rotational speeds Nm1 and Nm2 of the motors MG1 and MG2 are input from the motor ECU 40 by communication from those calculated based on the rotational positions of the rotors of the motors MG1 and MG2 detected by the rotational position detection sensors 43 and 44. It was supposed to be. Furthermore, the control output limit Wout * for the battery 50 is set by the communication from the battery ECU 52 by the one set by the output management routine illustrated in FIG.

  When the data is input in this way, it is determined whether or not the input accelerator opening Acc is greater than or equal to the threshold Aref (step S110). When the accelerator opening Acc is determined to be greater than or equal to the threshold Aref, the rated output Woutr has been exceeded from the battery 50. In order to request output, the excess output request flag Fout1 is set to a value 1 and transmitted to the battery ECU 52 (step S120). Here, the threshold value Aref is set to determine whether or not to request an output exceeding the rated output Woutr from the battery 50, and is set to 70% or 80%, for example. The output limit Wout * for control of the battery 50 when the value 1 is set in the excess output request flag Fout1 will be described later using the output management routine of FIG. Note that when the accelerator opening Acc is less than the threshold value Aref, it is not necessary to request an output exceeding the rated output Woutr from the battery 50, so the process proceeds to the next process without setting the value 1 to the excess output request flag Fout1.

  Subsequently, the required torque Tr * to be output to the ring gear shaft 32a as the drive shaft connected to the drive wheels 63a and 63b as the torque required for the vehicle based on the input accelerator opening Acc and the vehicle speed V and the vehicle. The required required power Pe * is set (step S130). In the embodiment, the required torque Tr * is determined in advance by storing the relationship between the accelerator opening Acc, the vehicle speed V, and the required torque Tr * in the ROM 74 as a required torque setting map, and the accelerator opening Acc, the vehicle speed V, , The corresponding required torque Tr * is derived and set from the stored map. FIG. 9 shows an example of the required torque setting map. The required power Pe * can be calculated as the sum of the set required torque Tr * multiplied by the rotational speed Nr of the ring gear shaft 32a and the charge / discharge required power Pb * required by the battery 50 and the loss Loss. The rotational speed Nr of the ring gear shaft 32a is obtained by multiplying the vehicle speed V by a conversion factor k (Nr = k · V), or the rotational speed Nm2 of the motor MG2 is divided by the gear ratio Gr of the reduction gear 35 (Nr = Nm2 / Gr).

  Then, the calculated required power Pe * is compared with the threshold value Pref (step S140). Here, the threshold value Pref sets the range of the motor operation mode in which the operation of the engine 22 is stopped and the vehicle travels only with the power output from the motor MG2, and is set according to the performance of the motor MG2 and the capacity of the battery 50. can do. When the required power Pe * is larger than the threshold value Pref, it is determined whether or not the engine 22 is operating (step S150). When it is determined that the engine 22 is operating, the engine 22 is based on the required power Pe *. The target rotational speed Ne * and the target torque Te * are set as operating points to be operated (step S160). This setting is performed based on an operation line for efficiently operating the engine 22 and the required power Pe *. FIG. 10 shows an example of the operation line of the engine 22 and how the target rotational speed Ne * and the target torque Te * are set. As shown in the figure, the target rotational speed Ne * and the target torque Te * can be obtained from the intersection of the operation line and a curve with a constant required power Pe * (Ne * × Te *).

  Next, using the target rotational speed Ne * of the engine 22, the rotational speed Nm2 of the motor MG2, the gear ratio ρ of the power distribution and integration mechanism 30, and the gear ratio Gr of the reduction gear 35, the target of the motor MG1 is expressed by the following equation (4). Based on the calculated rotational speed Nm1 *, the calculated target rotational speed Nm1 *, the input rotational speed Nm1 of the motor MG1, the target torque Te * of the engine 22, and the gear ratio ρ of the power distribution and integration mechanism 30 (5) Thus, a torque command Tm1 * as a torque to be output from the motor MG1 is calculated (step S170). Here, Expression (4) is a dynamic relational expression for the rotating elements of the power distribution and integration mechanism 30. FIG. 11 shows an example of a collinear diagram showing a dynamic relationship between the number of rotations and torque in the rotating elements of the power distribution and integration mechanism 30 when traveling with power output from the engine 22. In the figure, the left S-axis indicates the rotation speed of the sun gear 31 that is the rotation speed Nm1 of the motor MG1, the C-axis indicates the rotation speed of the carrier 34 that is the rotation speed Ne of the engine 22, and the R-axis indicates the rotation speed of the motor MG2. The rotational speed Nr of the ring gear 32 obtained by dividing the number Nm2 by the gear ratio Gr of the reduction gear 35 is shown. Expression (4) can be easily derived by using this alignment chart. The two thick arrows on the R axis indicate that the torque Tm1 output from the motor MG1 acts on the ring gear shaft 32a and the torque Tm2 output from the motor MG2 acts on the ring gear shaft 32a via the reduction gear 35. Torque. Expression (5) is a relational expression in feedback control for rotating the motor MG1 at the target rotational speed Nm1 *. In Expression (5), “k1” in the second term on the right side is a gain of a proportional term. “K2” in the third term on the right side is the gain of the integral term.

Nm1 * = Ne * ・ (1 + ρ) / ρ-Nm2 / (Gr ・ ρ) (4)
Tm1 * =-ρ ・ Te * / (1 + ρ) + k1 (Nm1 * -Nm1) + k2∫ (Nm1 * -Nm1) dt (5)

  Then, the torque command Tm1 * set as the required torque Tr * is divided by the gear ratio ρ of the power distribution and integration mechanism 30 and further divided by the gear ratio Gr of the reduction gear 35 to obtain the torque to be output from the motor MG2. A temporary torque Tm2tmp, which is a temporary value, is calculated by the following equation (6) (step S180), and the control output limit Wout * of the battery 50 and the set torque command Tm1 * are multiplied by the current rotational speed Nm1 of the motor MG1. The torque limit Tm2max as the upper limit of the torque that may be output from the motor MG2 is calculated by the following equation (7) by dividing the deviation from the power consumption (generated power) of the motor MG1 obtained by the number of revolutions Nm2 of the motor MG2. In step S190, the set temporary torque Tm2tmp is limited by the torque limit Tm2max according to the equation (8). To set the torque command Tm2 * of the motor MG2 (step S200). Here, equation (6) can be easily derived from the alignment chart of FIG.

Tm2tmp = (Tr * + Tm1 * / ρ) / Gr (6)
Tm2max = (Wout * -Tm1 * ・ Nm1) / Nm2 (7)
Tm2 * = min (Tm2tmp, Tm2max) (8)

  Thus, when the target engine speed Ne *, the target torque Te *, and the torque commands Tm1 *, Tm2 * of the motors MG1, MG2 are set, the target engine speed Ne * and the target torque Te * of the engine 22 are set in the engine ECU 24. Torque commands Tm1 * and Tm2 * for motors MG1 and MG2 are transmitted to motor ECU 40, respectively (step S210). The engine ECU 24 that has received the target rotational speed Ne * and the target torque Te * controls the intake air amount in the engine 22 so that the engine 22 is operated at the operating point indicated by the target rotational speed Ne * and the target torque Te *. Controls such as fuel injection control and ignition control. Further, the motor ECU 40 that has received the torque commands Tm1 * and Tm2 * controls the switching elements of the inverters 41 and 42 so that the motor MG1 is driven by the torque command Tm1 * and the motor MG2 is driven by the torque command Tm2 *. To do. By such control, the engine 22 can be efficiently operated within the range of the control output limit Wout * of the battery 50, and the required torque Tr * can be output to the ring gear shaft 32a as the drive shaft.

  Next, the allowable load LFmax of the booster circuit 55 is set based on the temperature Tup of the booster circuit 55 (step S220). In the embodiment, the allowable load LFmax is a map in which the relationship between the temperature Tup of the booster circuit 55 and the allowable load LFmax is determined in advance and stored as a load setting map, and the temperature Tup of the booster circuit 55 is given. From this, the corresponding allowable load LFmax is derived and set. An example of the allowable load setting map is shown in FIG. As shown in the figure, the allowable load LFmax of the booster circuit 55 is set to a predetermined value LF1 when the temperature Tup of the booster circuit 55 is equal to or lower than the predetermined temperature Tup1, and is increased when the temperature Tup of the booster circuit 55 is higher than the predetermined temperature Tup1. The higher the temperature Tup of the circuit 55, the lower the value from the predetermined value LF1 toward the value 0. This is to protect the booster circuit 55 by suppressing an excessive temperature rise of the booster circuit 55. Here, the predetermined value LF1 is determined based on the specification of the booster circuit 55, and for example, the maximum power exchanged between the low voltage system and the high voltage system or a load corresponding to the power in the vicinity thereof is used. be able to. The predetermined temperature Tup1 is set as a temperature at which the allowable load LFmax starts to decrease from the predetermined value LF1 in order to suppress an excessive temperature rise of the booster circuit 55, and is determined by the specification of the booster circuit 55 and the like.

  When the allowable load LFmax of the booster circuit 55 is set in this manner, the booster circuit 55 is driven and controlled within the set allowable load LFmax (step S230), and the drive control routine is terminated. Specifically, the drive control of the booster circuit 55 is performed by switching the transistors T31 and T32 so that the high voltage system voltage VH approaches the target voltage VH * within a range where the load LF of the booster circuit 55 is equal to or less than the allowable load LFmax. This can be done by controlling. Here, as the target voltage VH *, the rated maximum voltage set in advance for the motors MG1 and MG2 or a voltage slightly lower than that is used, or the motor MG1 based on the torque commands Tm1 * and Tm2 * of the motors MG1 and MG2. , MG2 may be a voltage set within a range not exceeding the rated maximum voltage preset. Thus, by controlling the switching of the transistors T31 and T32 within a range where the load LF of the booster circuit 55 is equal to or less than the allowable load LFmax, an excessive temperature rise of the booster circuit 55 can be suppressed. As a result, the booster circuit 55 can be protected more appropriately.

  When the required power Pe * is equal to or less than the threshold value Pref in step S140, it is determined that the vehicle should run in the motor operation mode, and both the target rotational speed Ne * and the target torque Te * of the engine 22 are set so that the engine 22 is stopped. 0 is set (step S240), a value 0 is set for the torque command Tm1 * of the motor MG1 (step S250), the processing of steps S180 to S230 is executed, and the drive control routine is terminated. After the engine 22 is thus stopped, the motor MG2 outputs the required torque Tr * to the ring gear shaft 32a as the drive shaft within the range of the control output limit Wout * of the battery 50, and travels.

  When it is determined in step S150 that the engine 22 is not operating, the excess output request flag Fout2 is set to a value 1 and transmitted to the battery ECU 52 (step S260), and the motor command of the engine 22 is transmitted to the torque command Tm1 * of the motor MG1. A ring torque Tcr is set (step S270). Then, the rotational speed Ne of the engine 22 is compared with a threshold value Nref (step S280). When the rotational speed Ne of the engine 22 is less than the threshold value Nref, the processing of steps S180 to S230 is executed, and the drive control routine is terminated. When the engine speed Ne is equal to or greater than the threshold value Nref, the engine 22 is instructed to perform fuel injection, ignition control, etc. (step S290), the processing of steps S180 to S230 is executed, and the drive control routine is terminated. Here, the threshold value Nref is the rotational speed Ne of the engine 22 at which fuel injection control or ignition control is started. For example, 1000 rpm or 1200 rpm can be used. The engine ECU 24 that has received the instruction performs fuel injection control and ignition control in the engine 22.

  The drive control has been described above. As described above, in this drive control, when the accelerator opening degree Acc is equal to or greater than the threshold value Aref, the excess output request flag Fout1 is set to 1 (step S120), and when the engine 22 is started, the excess output request flag Fout2 is set. Value 1 is set (step S260). In the drive control, the control output limit Wout * for the battery 50 is used when setting the torque command Tm2 * for the motor MG2 (step S190). Next, management of the output limit Wout * for control of the battery 50 used in such drive control will be described.

  When the output management routine of FIG. 8 is executed, the CPU (not shown) of the battery ECU 52 firstly allows the allowable load LFmax of the booster circuit 55, the excess output request flags Fout1, Fout2, the battery temperature Tb from the temperature sensor 51c, and the battery 50. The process of inputting data necessary for output management of the battery 50 such as the remaining capacity SOC and the deterioration factor D is executed (step S300). Here, it is assumed that the allowable load LFmax and the excess output request flags Fout1 and Fout2 of the booster circuit 55 are set by the drive control routine of FIG. In addition, the remaining capacity SOC of the battery 50 is input by reading what is set based on the integrated value of the charge / discharge current Ib detected by the current sensor 51b and written in a predetermined address of a RAM (not shown). . Further, the deterioration factor D is input by reading a value calculated by the expression (1) or (2) based on the charge / discharge current Ib by a deterioration factor calculation routine (not shown) and written at a predetermined address of a RAM (not shown). To do.

  When the data is thus input, the rated output Woutr is set based on the battery temperature Tb of the battery 50 and the remaining capacity SOC (step S310). As described above, the rated output Woutr is set by setting the basic value Wouttmp using the map showing the relationship between the battery temperature Tb and the basic value Wouttmp in FIG. 3, and the remaining capacity SOC and the output limiting correction coefficient in FIG. Can be performed by setting a correction coefficient for output restriction using a map showing the relationship between and the basic value Wouttmp and multiplying the correction coefficient for output restriction by the basic value Wouttmp.

  Subsequently, the deterioration factor D is compared with the above-described limit start threshold Dtag (step S320). When the deterioration factor D is equal to or less than the limit start threshold Dtag, the rated output Woutr is set to the output limit Wout of the battery 50 (step S330). . Then, the values of the excess output request flags Fout1 and Fout2 are examined (step S340). As described above, the excess output request flag Fout1 is set to a value of 1 when the accelerator opening Acc is greater than or equal to the threshold value Aref, and the excess output request flag Fout2 is set to a value of 1 when the engine 22 is started. When the excess output request flags Fout1 and Fout2 are both 0 (when neither 1 is set), the output limit Wout of the battery 50 is set to the control output limit Wout * and the hybrid electronic control unit 70 is set. (Step S410), and the output management routine is terminated.

  When at least one of the excess output request flags Fout1 and Fout2 is 1, the execution of the previous excess output setting process (the process of step S380 for setting an output larger than the output limit Wout to the control output limit Wout *) is terminated. It is determined whether or not a predetermined time t1 has elapsed since the last time (step S350). Here, the predetermined time t1 is set as an interval for executing the excess output setting process, and depends on the performance of the battery 50 or an output that may exceed the output limit Wout (predetermined output Wset described later). Can be determined. If it is determined that the predetermined time t1 has not elapsed since the end of the previous excessive output setting process, it is determined that the excessive output setting process should not be executed, and the output limit Wout of the battery 50 is output as a control output. The limit Wout * is set and transmitted to the hybrid electronic control unit 70 (step S410), and the output management routine is terminated.

  When it is determined that the predetermined time t1 has elapsed since the end of the previous excessive output setting process, the allowable load LFmax of the booster circuit 55 is compared with the threshold value LFref (step S360). Here, the threshold value LFref is used to determine whether or not the excess output setting process may be executed, and corresponds to, for example, 70%, 80%, 90%, or 100% of the predetermined value LF1. The value to be used can be used.

  When the allowable load LFmax is equal to or greater than the threshold LFref, it is determined that the excess output setting process may be executed, and it is determined whether or not a predetermined time t2 has elapsed since the start of the current excess output setting process (step S370). When it is determined that the predetermined time t2 has not elapsed since the start of the current excess output setting process, the excess output (Wout + Wset), which is an output obtained by adding the predetermined output Wset to the output limit Wout of the battery 50, is used for control. The output limit Wout * is set and transmitted to the hybrid electronic control unit 70 (step S380), and the output management routine is terminated. Here, the predetermined time t2 is set as a time limit during which the excess output setting process can be continuously executed, and can be determined by the performance of the battery 50, the predetermined output Wset, or the like. The predetermined output Wset sets an upper limit output that may be output beyond the output limit Wout, and can be determined by the performance of the battery 50 or the like. Thus, when the excess output (Wout + Wset) is set to the control output limit Wout *, the torque command Tm2 * of the motor MG2 can be set larger by the predetermined output Wset when the drive control is subsequently executed. Thereby, when starting the engine 22, the engine 22 can be started rapidly, respond | corresponding fully by a driver | operator's request | requirement. Further, when the accelerator opening Acc is greatly depressed, it is possible to respond sufficiently to the driver's request. By the way, although the permission of the excess output (Wout + Wset) is delayed by the start interval of the output management routine, the interval is several msec in the embodiment, so that the driver does not feel this time delay.

  When it is determined that the predetermined time t2 has elapsed since the start of the current excess output setting process, a value 0 is set to the excess output request flags Fout1 and Fout2 to end the excess output setting process (step S420). Then, the output limit Wout of the battery 50 is set to the control output limit Wout * and transmitted to the hybrid electronic control unit 70 (step S410), and the output management routine is terminated. In the embodiment, the setting of the value 0 to the excess output request flags Fout1 and Fout2 is performed by outputting a control signal from the battery ECU 52 to the hybrid electronic control unit 70 by communication.

  When the allowable load LFmax is less than the threshold LFref in step S360, it is determined that the excess output setting process should not be executed, the excess output request flags Fout1 and Fout2 are set to 0 (step S420), and the output limit Wout of the battery 50 is set. Is set to the control output limit Wout * and transmitted to the hybrid electronic control unit 70 (step S410), and the output management routine is terminated. As a result, it is possible to suppress the output of power exceeding the output limit Wout from the battery 50 as compared with the case where the excess output (Wout + Wset) is set to the control output limit Wout *. It is possible to suppress the exchange of electric power larger than the electric power corresponding to the output limit Wout between the battery 50 and the motors MG1 and MG2 via 55, and the temperature rise of the booster circuit 55 can be suppressed.

  When the deterioration factor D is larger than the limit start threshold Dtag in step S320, the output limit Wout of the battery 50 is calculated by the above-described equation (3) (step S390). Then, the value of the excess output request flag Fout2 is checked (step S400), and when the excess output request flag Fout2 is a value 1, that is, when the engine 22 is started, the processing after step S350 is executed. As a result, the engine 22 can be started quickly while sufficiently responding to the driver's request. Then, after the engine 22 is started, the deterioration factor D can be reduced by charging the battery 50 with the electric power generated by the motor MG1 using a part of the power output from the engine 22. That is, it is possible to suppress the deterioration of the battery 50 due to the continuous discharge due to the large current.

  On the other hand, when the excess output request flag Fout2 is 0, the output limit Wout of the battery 50 is set to the control output limit Wout * and transmitted to the hybrid electronic control unit 70 (step S410), and the output management routine is terminated. To do. That is, when the excess output request flag Fout2 is 0, the output limit Wout is set to the control output limit Wout * regardless of the excess output request flag Fout1. Thereby, the increase in the degradation factor D can be suppressed. That is, it can be prevented from reaching the deterioration start timing.

  According to the hybrid vehicle 20 of the embodiment described above, when the deterioration factor D calculated based on the charge / discharge current Ib of the battery 50 is equal to or less than the limit start threshold Dtag smaller than the reference value Dmax, the battery temperature Tb of the battery 50 is When the rated output Woutr based on the remaining capacity SOC is set to the output limit Wout, and the deterioration factor D is larger than the limit start threshold Dtag, the output smaller than the rated output Woutr is output limited so that the deterioration factor D does not exceed the reference value Dmax. Set to Wout. When the excess output request flag Fout2 is 1 (when the engine 22 is started) and the allowable load LFmax of the booster circuit 55 is greater than or equal to the threshold LFref, the excess output that is an output obtained by adding the predetermined output Wset to the output limit Wout. (Wout + Wset) is set to the control output limit Wout *, the engine 22 is motored by the motor MG1 within the range of the control output limit Wout *, and the required torque Tr * is the ring gear shaft as the drive shaft. Since the engine 22 and the motors MG1 and MG2 are controlled so as to be output to 32a and the booster circuit 55 is driven and controlled within the range of the allowable load LFmax, the engine 22 can be started quickly while responding sufficiently to the driver's request. can do. Even when the engine 22 is started, if the allowable load LFmax is less than the threshold value LFref, the output limit Wout is set to the control output limit Wout *, and the engine 22 and the motor MG1, within the range of the control output limit Wout *. Since the MG2 is controlled and the booster circuit 55 is driven and controlled within the range of the allowable load LFmax, it is possible to suppress the output of the power exceeding the output limit Wout from the battery 50. Temperature rise can be suppressed. As a result, the booster circuit 55 can be protected more appropriately. Further, when the deterioration factor D is larger than the limit start threshold Dtag and the excess output request flag Fout2 is 0, regardless of the value of the excess output request flag Fout1 (regardless of whether the accelerator opening Acc is equal to or greater than the threshold Aref). ) The output limit Wout is set to the control output limit Wout * to control the engine 22 and the motors MG1 and MG2 within the range of the control output limit Wout * and drive the booster circuit 55 within the range of the allowable load LFmax. Since it controls, it can suppress that the electric power exceeding the output limitation Wout is output from the battery 50, and it can be prevented from reaching the deterioration start timing assumed that the deterioration of the battery 50 starts.

  In the hybrid vehicle 20 of the embodiment, both the excess output request flags Fout1 and Fout2 are considered in setting the control output limit Wout * of the battery 50, but only one of the excess output request flags Fout1 and Fout2 is considered. It may be considered.

  In the hybrid vehicle 20 of the embodiment, the temperature of the reactor L is used as the temperature Tup of the booster circuit 55, but the temperature of the transistors T31 and T32 may be used.

  In the hybrid vehicle 20 of the embodiment, when the excess output request flag Fout2 is 1 (when the engine 22 is started), or when the deterioration factor D is equal to or less than the limit start threshold Dtag, the excess output request flag Fout1 is 1 ( When the accelerator opening degree Acc is equal to or greater than the threshold value Aref), the output limit Wout or the excess output (Wout + Wset) is set as the control output limit Wout * based on whether the allowable load LFmax of the booster circuit 55 is equal to or greater than the threshold value LFref. However, the output limit Wout or the excess output (Wout + Wset) may be set as the control output limit Wout * based on whether or not the temperature Tup of the booster circuit 55 is equal to or lower than the threshold value Turef. Here, for the threshold value Turef, the predetermined temperature Tup1 described above with reference to FIG. 11 or a temperature slightly higher than that can be used. Further, instead of or in addition to the temperature Tup of the booster circuit 55, the temperatures of the motors MG1, MG2 and the inverters 41, 42 may be used. When the temperatures of the motors MG1 and MG2 and the inverters 41 and 42 are used, a hardware configuration without the booster circuit 55 may be used.

  In the hybrid vehicle 20 of the embodiment, when the excess output request flag Fout2 is 1 (when the engine 22 is started), or when the deterioration factor D is equal to or less than the limit start threshold Dtag, the excess output request flag Fout1 is 1 ( When the accelerator opening Acc is equal to or greater than the threshold value Aref), the output limit Wout or the excess output (Wout + Wset) is set to the control output limit Wout * using the allowable load LFmax of the booster circuit 55. However, the motor MG1 The output limit Wout or the excess output (Wout + Wset) may be set as the control output limit Wout * using the allowable load (drive limit) of the MG2 or the inverters 41 and 42. In this case, a hardware configuration without the booster circuit 55 may be employed.

  In the hybrid vehicle 20 of the embodiment, the power of the motor MG2 is changed by the reduction gear 35 and output to the ring gear shaft 32a. However, as illustrated in the hybrid vehicle 120 of the modification of FIG. May be output to an axle (an axle connected to the wheels 64a and 64b in FIG. 13) different from an axle to which the ring gear shaft 32a is connected (an axle to which the drive wheels 63a and 63b are connected).

  In the hybrid vehicle 20 of the embodiment, the power of the engine 22 is output to the ring gear shaft 32a as the drive shaft connected to the drive wheels 63a and 63b via the power distribution and integration mechanism 30, but the modified example of FIG. The hybrid vehicle 220 includes an inner rotor 232 connected to the crankshaft 26 of the engine 22 and an outer rotor 234 connected to a drive shaft that outputs power to the drive wheels 63a and 63b. A counter-rotor motor 230 that transmits a part of the power to the drive shaft and converts the remaining power into electric power may be provided.

  In the hybrid vehicle 20 of the embodiment, the power of the engine 22 is output to the ring gear shaft 32a as the drive shaft connected to the drive wheels 63a and 63b via the power distribution and integration mechanism 30, but the modified example of FIG. As exemplified in the hybrid vehicle 320, a power generation motor MG1 may be attached to the engine 22 and a traveling motor MG2 may be provided.

  In addition, it is not limited to those applied to such hybrid vehicles, but is incorporated into non-moving equipment such as forms of power output devices mounted on moving bodies such as vehicles other than automobiles, ships, and aircraft, and construction equipment. A power output device may be used, or a control method for such a power output device may be used. Further, it may be configured as a drive device that is used together with the power storage device to drive the drive shaft.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the combination of the engine 22, the power distribution and integration mechanism 30, the motors MG1 and MG2, and the booster circuit 55 corresponds to “power output device”, the battery 50 corresponds to “power storage means”, and the temperature sensor 55a. The hybrid electronic control unit 70 that corresponds to “temperature detection means” and executes the process of step S220 of the drive control routine of FIG. 7 that sets the allowable load LFmax of the booster circuit 55 based on the temperature Tup of the booster circuit 55 is “ A battery ECU 52 that corresponds to “driving allowance setting means” and calculates a deterioration factor D, which is a parameter assumed to start deterioration of the battery 50 when the reference value Dmax is exceeded, based on the charge / discharge current Ib. When the deterioration factor D is equal to or less than the limit start threshold Dtag smaller than the reference value Dmax. Sets the rated output Woutr based on the battery temperature Tb of the battery 50 and the remaining capacity SOC to the output limit Wout of the battery 50, and the deterioration factor D does not exceed the reference value Dmax when the deterioration factor D is greater than the limit start threshold Dtag. The battery ECU 52 that executes the processes of steps S310 to S330 and S390 of the output management routine of FIG. 8 that sets an output smaller than the rated output Woutr to the output limit Wout of the battery 50 based on the deterioration factor D and the limit start threshold Dtag. Corresponding to “output limit setting means”, when both the excess output request flags Fout1 and Fout2 have a value of 0, or when the excess output request flag Fout2 has a value of 1 and the allowable load LFmax is less than the threshold value LFref, the deterioration factor D is Exceeds below the limit start threshold Dref When the request flag Fout1 is 1, the allowable load LFmax is less than the threshold LFref, and when the deterioration factor D is greater than the threshold Dref, and when the excess output request flag Fout2 is 0, the output limit Wout of the battery 50 is controlled as the output limit for control. Set to Wout * and transmitted to the hybrid electronic control unit 70. When the excess output request flag Fout2 is 1, the allowable load LFmax is greater than or equal to the threshold LFref, or when the deterioration factor D is less than or equal to the limit start threshold Dref. When the request flag Fout1 is 1 and the allowable load LFmax is greater than or equal to the threshold LFref, an excess output (Wout + Wset), which is an output obtained by adding the predetermined output Wset to the output limit Wout of the battery 50, is set as the control output limit Wout *. Electronic control unit for hybrid The battery ECU 52 that executes the output management routine of FIG. 8 transmitted to 70, and the target rotational speed Ne * and the target torque Te * of the engine 22 so as to travel with the required torque Tr * within the range of the received control output limit Wout *. , The motor MG1, MG2 torque commands Tm1 *, Tm2 * are set and transmitted to each ECU, and the drive control routine of FIG. 7 is executed to control the booster circuit 55 within the allowable load LFmax. A unit 70, an engine ECU 24 that controls the engine 22 based on the received target rotational speed Ne * and the target torque Te *, and a motor ECU 40 that controls the motors MG1 and MG2 based on the received torque commands Tm1 * and Tm2 *. Corresponds to “control means”. The engine 22 corresponds to an “internal combustion engine”, the motor MG1 corresponds to a “first electric motor”, the motor MG2 corresponds to a “second electric motor”, and the booster circuit 55 includes a “high voltage system voltage adjusting unit”. The power distribution and integration mechanism 30 corresponds to “3-axis power input / output means”. Furthermore, the combination of the engine 22, the rotor motor 230, the motor MG2, and the booster circuit 55, and the combination of the engine 22, the motors MG1, MG2, and the booster circuit 55 that do not include the power distribution and integration mechanism 30 are also “power output devices”. It corresponds to.

  Here, as the “power output device”, a combination of the engine 22, the power distribution and integration mechanism 30, the motors MG 1 and MG 2, and the booster circuit 55, or the engine 22, the rotor motor 230, the motor MG 2, and the booster circuit 55. The combination is not limited to the combination of the engine 22, the motors MG1, MG2 and the booster circuit 55 without the power distribution / integration mechanism 30, but the engine 22 and the booster circuit 55 are not provided. As long as it can output, it does not matter. The “storage means” is not limited to the battery 50 configured as a lithium ion battery, and may be anything as long as it can supply power to the power output device. The “temperature detection means” is not limited to the temperature sensor 55a that detects the temperature of the booster circuit 55, but the temperature of the power output device such as one that detects the temperatures of the motors MG1 and MG2 and the inverters 41 and 42. Any device can be used as long as it can detect. The “driving allowable level setting means” is not limited to the one that sets the allowable load LFmax of the booster circuit 55 based on the temperature Tup of the booster circuit 55, but for the power output based on the temperature of the power output device. Any device may be used as long as it sets a drive tolerance level that allows the device to be driven. The “deterioration parameter calculation means” is not limited to one that calculates the deterioration factor D, which is a parameter that is assumed to start deterioration of the battery 50 when the reference value Dmax is exceeded, based on the charge / discharge current Ib. However, based on the current input / output to / from the power storage means, any calculation can be performed as long as the deterioration parameter is calculated which is assumed to start the deterioration of the power storage means when the first predetermined value is exceeded. I do not care. The “output limit setting means” sets the rated output Woutr based on the battery temperature Tb of the battery 50 and the remaining capacity SOC to the output limit Wout of the battery 50 when the deterioration factor D is less than the limit start threshold Dtag smaller than the reference value Dmax. When the deterioration factor D is larger than the limit start threshold Dtag, an output smaller than the rated output Woutr is output based on the deterioration factor D and the limit start threshold Dtag so that the deterioration factor D does not exceed the reference value Dmax. The rated output of the power storage means is set to the output limit of the power storage means when the deterioration parameter is in the first state that is less than the second predetermined value smaller than the first predetermined value. When the deterioration parameter is in the second state exceeding the second predetermined value, the deterioration parameter As long as over data is set to the output limit of the accumulator unit rated output smaller output so as not to exceed the first predetermined value may be used as any kind. The “control means” is not limited to the combination of the hybrid electronic control unit 70, the engine ECU 24, the motor ECU 40, and the battery ECU 52, and may be configured by a single electronic control unit. Further, as the “control means”, when the excess output request flags Fout1 and Fout2 are both 0, or when the allowable output LFmax is less than the threshold LFref when the excess output request flag Fout2 is 1, the deterioration factor D is limited. When the allowable output LFmax is less than the threshold LFref when the excess output request flag Fout1 is equal to or less than the start threshold Dref and when the deterioration factor D is greater than the threshold Dref, when the excess output request flag Fout2 is 0, the output of the battery 50 The limit Wout is set to the control output limit Wout *, and the target rotational speed Ne *, the target torque Te *, the motor MG1, and the motor MG1, so as to travel with the required torque Tr * within the range of the set control output limit Wout *. MG2 torque commands Tm1 * and Tm2 * are set to And the booster circuit 55 is driven and controlled within the range of the allowable load LFmax. When the excessive output request flag Fout2 is 1, the allowable load LFmax is equal to or greater than the threshold LFref, or the deterioration factor D is When the excess output request flag Fout1 is equal to or less than the limit start threshold Dref and the allowable load LFmax is equal to or greater than the threshold LFref, an excess output (Wout + Wset) that is an output obtained by adding a predetermined output Wset to the output limit Wout of the battery 50 is used for control. The output limit Wout * is set, and the target rotational speed Ne * and target torque Te * of the engine 22 and the torque command Tm1 of the motors MG1 and MG2 are set so as to travel with the required torque Tr * within the range of the set output limit Wout * for control. *, Tm2 * are set and the engine 22 and motors MG1, MG2 Is not limited to driving the booster circuit 55 within the range of the allowable load LFmax, and when there is no excess output request, which is a request for discharging from the power storage means by power exceeding the output limit. Control the power output device within the range of the output limit and within the allowable drive range, and within the specified excess output range exceeding the output limit when the allowable drive level exceeds the specified level when the excess output is requested In addition, the power output device is controlled within the allowable drive range, and when the excessive output is requested, the drive output is within the output limit range and the allowable drive range when the allowable drive level is less than the predetermined level. Any device that controls the device may be used. The “internal combustion engine” is not limited to an internal combustion engine that outputs power using a hydrocarbon fuel such as gasoline or light oil, and may be any type of internal combustion engine such as a hydrogen engine. The “first motor” is not limited to the motor MG1 configured as a synchronous generator motor, and any type of motor can be used as long as it can output power to the output shaft of the internal combustion engine, such as an induction motor. It does not matter. The “second motor” is not limited to the motor MG2 configured as a synchronous generator motor, and may be any type of motor that can output power to the drive shaft, such as an induction motor. I do not care. As the “high voltage system voltage adjusting means”, a boosting circuit configured as a boosting converter including two transistors T31 and T32, two diodes D31 and D32 connected in parallel in opposite directions to the transistors T31 and T32, and a reactor L. The voltage of the high voltage system connected to the low voltage system to which the power storage means is connected and the high voltage system to which the drive circuit of the first motor and the drive circuit of the second motor are connected is not limited to 55. Any adjustment is possible as long as the adjustment is made. The “three-axis power input / output means” is not limited to the power distribution / integration mechanism 30 described above, but includes four or more shafts using a double pinion type planetary gear mechanism or a combination of a plurality of planetary gear mechanisms. Any one of the three axes connected to the three axes of the drive shaft, the output shaft, and the rotating shaft of the generator, such as those connected to the motor and those having a different operation action from the planetary gear such as a differential gear As long as the power is input / output to / from the remaining shafts based on the power input / output to / from the power source, any method may be used. The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. It is an example for specifically explaining the best mode for doing so, and does not limit the elements of the invention described in the column of means for solving the problem. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  The best mode for carrying out the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the gist of the present invention. Of course, it can be implemented in the form.

  The present invention can be used in the power output apparatus and the vehicle manufacturing industry.

It is a block diagram which shows the outline of a structure of the hybrid vehicle 20 carrying the power output device which is one Example of this invention. It is a block diagram which shows the outline of a structure of the electric drive system containing motor MG1, MG2. It is explanatory drawing which shows an example of the relationship between battery temperature Tb of the battery 50, and basic value Wouttmp. It is explanatory drawing which shows an example of the relationship between the remaining capacity SOC of the battery 50, and the output limiting correction coefficient. It is explanatory drawing which shows the mode of the time change of the voltage Vb between terminals when the discharge by a large current is continued from the battery. It is explanatory drawing which shows an example of the mode of the time change of the output limitation Wout of the battery 50 set so that the deterioration factor D may not exceed the reference value Dmax. It is a flowchart which shows an example of the drive control routine performed by the electronic control unit for hybrids 70 of an Example. 4 is a flowchart showing an example of an output management routine executed by a battery ECU 52. It is explanatory drawing which shows an example of the map for request | requirement torque setting. It is explanatory drawing which shows a mode that an example of the operating line of the engine 22, the target rotational speed Ne *, and the target torque Te * are set. FIG. 3 is an explanatory diagram showing an example of a collinear diagram showing a dynamic relationship between the number of rotations and torque in a rotating element of a power distribution and integration mechanism 30 when traveling with power output from an engine 22; It is explanatory drawing which shows an example of the map for an allowable load setting. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 120 according to a modification. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 220 of a modified example. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 320 of a modified example.

Explanation of symbols

20, 120, 220, 320 Hybrid vehicle, 22 engine, 24 engine electronic control unit (engine ECU), 26 crankshaft, 28 damper, 30 power distribution integration mechanism, 31 sun gear, 32 ring gear, 32a ring gear shaft, 33 pinion gear, 34 Carrier, 35 Reduction gear, 40 Motor electronic control unit (motor ECU), 41, 42 Inverter, 43, 44 Rotation position detection sensor, 50 Battery, 51a Voltage sensor, 51b Current sensor, 51c Temperature sensor, 52 Battery electronics Control unit (battery ECU), 54 power line, 54a positive bus, 54b negative bus, 55 booster circuit, 55a temperature sensor, 56 system main relay, 57, 58 capacitor, 57a, 58a 60, gear mechanism, 62 differential gear, 63a, 63b drive wheel, 64a, 64b wheel, 70 hybrid electronic control unit, 72 CPU, 74 ROM, 76 RAM, 80 ignition switch, 81 shift lever, 82 shift position sensor, 83 accelerator pedal, 84 accelerator pedal position sensor, 85 brake pedal, 86 brake pedal position sensor, 88 vehicle speed sensor, 230 rotor motor, 232 inner rotor, 234 outer rotor, MG1, MG2 motor, D11-D16, D21-D26, D31, D32 Diode, T11 to T16, T21 to T26, T31, T32 Transistor, L reactor.

Claims (13)

A power output device including a power output device capable of outputting power to a drive shaft,
Power storage means capable of supplying power to the power output device;
Temperature detecting means for detecting the temperature of the power output device;
A drive allowance setting means for setting a drive allowance that is an allowance of the drive of the power output device based on the detected temperature of the power output device;
A deterioration parameter calculating means for calculating a deterioration parameter, which is a parameter assumed to start deterioration of the power storage means when a first predetermined value is exceeded, based on a current input to and output from the power storage means;
When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated An output that sets an output smaller than the rated output as an output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value when the deterioration parameter exceeds the second predetermined value. Limit setting means,
When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, the output is within the set output limit range and within the set allowable drive range. The device for controlling the power output is controlled, and when the excess output request is made and the set allowable drive level is greater than or equal to a predetermined level, it is within a predetermined excess output range exceeding the set output limit and the set The power output device is controlled within a range of allowable drive, and when the excess output request is made and the set allowable drive is less than the predetermined range, the output limit is within the set range. And control means for controlling the power output device within the set allowable drive range;
A power output device comprising: The power output device according to claim 1,
The power output device includes an internal combustion engine, a first electric motor capable of outputting power to the output shaft of the internal combustion engine, a second electric motor capable of outputting power to the drive shaft, and the power storage means. A high voltage system voltage adjusting means for adjusting a voltage of the high voltage system connected to a low voltage system and a high voltage system to which the drive circuit of the first motor and the drive circuit of the second motor are connected; A device comprising
The excess output request is a request made when the internal combustion engine is motored and started by the first electric motor.
Power output device. The power output device according to claim 2,
The excess output request is a start excess output request made when starting the internal combustion engine and a drive excess output request made when a predetermined large driving force is required for the drive shaft,
The control means controls the power output device within the set output limit when both the start excess output request and the drive excess output request are not made, and the start excess output request And when the drive excess output request is made in the first state, the predetermined excess output or the set The power output device is controlled within an output limit range, and when the start excess output request is not made in the second state, the setting is made regardless of whether the drive excess output request is made or not. Means for controlling the power output device within the range of the output limit.
Power output device. The power output device according to claim 2 or 3,
The temperature detecting means is means for detecting the temperature of the high voltage system voltage adjusting means,
The drive allowable degree setting means is a means for setting the drive allowable degree of the high voltage system voltage adjusting means,
The control means is means for controlling the high voltage system voltage adjusting means within the set allowable drive range.
Power output device.   The remaining shaft is connected to the three shafts of the output shaft of the internal combustion engine, the drive shaft, and the rotating shaft of the first electric motor, based on the power input / output to / from any two of the three shafts. The power output apparatus according to any one of claims 2 to 4, further comprising a three-axis power input / output means for inputting and outputting power.   The drive allowance degree setting means is a means for setting the drive allowance degree such that when the detected temperature of the power output device is higher than a predetermined temperature, the drive allowance level tends to decrease as the temperature of the power output device increases. The power output apparatus according to any one of claims 1 to 5.   The power output apparatus according to any one of claims 1 to 6, wherein the power storage means is a lithium ion secondary battery. A power output device including a power output device capable of outputting power to a drive shaft,
Power storage means capable of supplying power to the power output device;
Temperature detecting means for detecting the temperature of the power output device;
A deterioration parameter calculating means for calculating a deterioration parameter, which is a parameter assumed to start deterioration of the power storage means when a first predetermined value is exceeded, based on a current input to and output from the power storage means;
When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated An output that sets an output smaller than the rated output as an output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value when the deterioration parameter exceeds the second predetermined value. Limit setting means,
When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, it is based on the detected temperature of the power output device within the set output limit range. The power output device is controlled within a drive limit range, and when the excess output request is made, when the detected temperature of the power output device is equal to or lower than a predetermined temperature, the predetermined output limit is exceeded. The power output device is controlled within an excess output range and within the drive limit range, and the detected temperature of the power output device exceeds a predetermined temperature when the excess output request is made Control means for controlling the power output device within the set output limit range and sometimes within the drive limit range,
A power output device comprising:   A vehicle on which the power output device according to any one of claims 1 to 8 is mounted and an axle is connected to the drive shaft. A drive device that is used together with a power storage means to drive a drive shaft,
A power output device capable of receiving power from the power storage means and outputting power to the drive shaft;
Temperature detecting means for detecting the temperature of the power output device;
A drive allowance setting means for setting a drive allowance that is an allowance of the drive of the power output device based on the detected temperature of the power output device;
A deterioration parameter calculating means for calculating a deterioration parameter, which is a parameter assumed to start deterioration of the power storage means when a first predetermined value is exceeded, based on a current input to and output from the power storage means;
When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated An output that sets an output smaller than the rated output as an output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value when the deterioration parameter exceeds the second predetermined value. Limit setting means,
When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, the output is within the set output limit range and within the set allowable drive range. The device for controlling the power output is controlled, and when the excess output request is made and the set allowable drive level is greater than or equal to a predetermined level, it is within a predetermined excess output range exceeding the set output limit and the set The power output device is controlled within a range of allowable drive, and when the excess output request is made and the set allowable drive is less than the predetermined range, the output limit is within the set range. And control means for controlling the power output device within the set allowable drive range;
A drive device comprising: A drive device that is used together with a power storage means to drive a drive shaft,
A power output device capable of receiving power from the power storage means and outputting power to the drive shaft;
Temperature detecting means for detecting the temperature of the power output device;
A deterioration parameter calculating means for calculating a deterioration parameter, which is a parameter assumed to start deterioration of the power storage means when a first predetermined value is exceeded, based on a current input to and output from the power storage means;
When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, and the calculated An output that sets an output smaller than the rated output as an output limit of the power storage means so that the deterioration parameter does not exceed the first predetermined value when the deterioration parameter exceeds the second predetermined value. Limit setting means,
When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, it is based on the detected temperature of the power output device within the set output limit range. The power output device is controlled within a drive limit range, and when the excess output request is made, when the detected temperature of the power output device is equal to or lower than a predetermined temperature, the predetermined output limit is exceeded. The power output device is controlled within an excess output range and within the drive limit range, and the detected temperature of the power output device exceeds a predetermined temperature when the excess output request is made Control means for controlling the power output device within the set output limit range and sometimes within the drive limit range,
A drive device comprising: A power output device control method comprising: a power output device capable of outputting power to a drive shaft; and a power storage means capable of supplying power to the power output device,
(A) Based on the temperature of the power output device, a drive allowable level is set that allows the power output device to be driven,
(B) Based on the current input to and output from the power storage means, calculate a deterioration parameter that is a parameter that is assumed to start the deterioration of the power storage means when a first predetermined value is exceeded,
(C) When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, When the calculated degradation parameter is in the second state exceeding the second predetermined value, an output smaller than the rated output is used to limit the output of the power storage means so that the degradation parameter does not exceed the first predetermined value. Set,
(D) When an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made, a range within the set output limit and within the set allowable drive range The power output device is controlled within a predetermined excess output range exceeding the set output limit when the set allowable drive level is not less than a predetermined level when the excess output request is made, and The power output device is controlled within the set allowable drive range, and the set output limit is set when the set allowable drive level is less than the predetermined level when the excess output request is made. And controlling the power output device within the range of the set allowable driving range,
Control method of power output device. A power output device control method comprising: a power output device capable of outputting power to a drive shaft; and a power storage means capable of supplying power to the power output device,
(A) Based on the current input to and output from the power storage means, calculate a deterioration parameter, which is a parameter that is assumed to start deterioration of the power storage means when a first predetermined value is exceeded,
(B) When the calculated deterioration parameter is in a first state that is less than or equal to a second predetermined value that is less than the first predetermined value, the rated output of the power storage means is set to the output limit of the power storage means, When the calculated degradation parameter is in the second state exceeding the second predetermined value, an output smaller than the rated output is used to limit the output of the power storage means so that the degradation parameter does not exceed the first predetermined value. Set,
(C) Based on the temperature within the set output limit and the temperature of the power output device when an excess output request, which is a request for discharging from the power storage means with electric power exceeding the set output limit, is not made The power output device is controlled within a drive limit range, and when the excess output request is made, when the temperature of the power output device is equal to or lower than a predetermined temperature, a predetermined excess output exceeding the set output limit The power output device is controlled within the range of the drive limit and within the drive restriction range, and the set output is output when the temperature of the power output device exceeds a predetermined temperature when the excess output request is made. Controlling the power output device within a limit range and within the drive limit range;
Control method of power output device.

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