WO2012157049A1 - Air conditioner control device - Google Patents

Abstract

An air conditioner (1), installed in a vehicle in which a battery (5) is cooled with air sucked in from the vehicle cabin, blows the air introduced from either an external intake port (2) or an internal intake port (3) into the vehicle cabin. A battery ECU (8), which controls the battery (5), instructs an air conditioner ECU (11) to switch the air intake ports so that the air is taken in by selecting the port from among the external intake port (2) and the internal intake port (3) that will provide the better balance of power between the amount of power charged to the battery (5) by regeneration and the amount of power consumed by the air conditioner (1).

Description

Air conditioner control device

The present invention is mounted on a vehicle that cools a battery with air sucked from a passenger compartment, blows air taken from the passenger compartment or outside the passenger compartment to the passenger compartment, and air inside the passenger compartment and air outside the passenger compartment. It is related with the control apparatus of the air conditioner which can switch the air taken in into the outside air which is.

The air conditioner installed in the vehicle heats and cools the passenger compartment by heating and cooling the air taken in from the passenger compartment and outside the passenger compartment as necessary and blowing it to the passenger compartment. The vehicle is provided with two air intake ports, an internal air intake port for taking in air inside the vehicle interior, that is, internal air, and an outside air intake port for taking in air outside the vehicle interior, that is, outside air. Whether air is taken into the air conditioner from the air intake can be switched.

On the other hand, in recent years, an electric vehicle that runs by an electric motor and a hybrid vehicle that includes two drive sources of an electric motor and an internal combustion engine have been put into practical use. These vehicles are equipped with a large-capacity battery for supplying electric power to the electric motor, and the heat generated by such a battery is difficult to ignore. Therefore, in such a vehicle, the battery may be cooled by blowing air sucked from a suction port opening in the passenger compartment to the battery.

Conventionally, a device described in Patent Document 1 is known as a control device for an air conditioner that is applied to a vehicle that cools a battery with the inside air. The air conditioner control device described in this document switches the air intake port of the air conditioner to the outside air intake port when the battery becomes hot, and changes the direction of the outside air cooled by the air conditioner for battery cooling. The air is directed to the suction port for sucking air.

JP 2004-220799 A

Such a control device for a conventional air conditioner is certainly effective in improving the cooling capacity of a battery that has become too hot. However, although the cooling performance of the battery is considered, the power saving performance of the entire vehicle is not sufficiently considered, so there is still room for improvement in improving the efficiency of power use. Yes.

This invention is made | formed in view of such a situation, The objective is to provide the control apparatus of the air conditioner which can aim at the further improvement of an electric power balance through selection of the air taken in into an air conditioner. .

In order to achieve the above object, an air conditioner control device according to the present invention is mounted on a vehicle that cools a battery with air sucked from a passenger compartment, and blows air taken from the passenger compartment or outside the passenger compartment into the passenger compartment. In a control device for an air conditioner capable of switching between air taken into the vehicle interior air and air outside the vehicle compartment, the amount of electric power charged in the battery through regeneration and the air conditioning The air intake is selected by selecting the one with the better power balance with the amount of power consumed by the apparatus.

空調 The power consumption of the air conditioner varies depending on whether the inside air or outside air is taken in. For example, if the temperature of the outside air is higher than the temperature of the inside air, the cooling capacity of the air conditioner must be increased if the cooling is performed by taking in the higher temperature outside air than when the cooling is performed by taking in the lower temperature inside air. The power consumption increases.

On the other hand, when the battery is cooled with air sucked from the passenger compartment, the amount of power charged in the battery through regeneration, that is, the amount of regenerative power of the battery, varies depending on whether inside air or outside air is taken into the air conditioner. Sometimes. This is due to the following reason. The temperature of the air sucked from the suction port changes between when the outside air is taken into the air conditioner and when the inside air is taken. And if the temperature of the air suck | inhaled from the suction inlet falls, the temperature of a battery will fall more. On the other hand, when the temperature of the battery rises, the amount of charge of the battery is limited to protect the battery, and it becomes impossible to charge the battery with all the electric power generated by the regeneration. Therefore, the amount of electric power charged in the battery through regeneration varies depending on whether the air to be taken in is inside air or outside air.

In this way, the power consumption of the air conditioner and the regenerative power of the battery change depending on whether the inside air or the outside air is taken into the air conditioner. As a result, the power consumption of the air conditioner and the regenerative power of the battery The power balance, that is, the value obtained by subtracting the amount of power consumed by the air conditioner from the amount of power charged to the battery through regeneration also changes.

In that respect, in the above-described present invention, the air intake is performed by selecting the better one of the inside air and the outside air that has a better power balance. Therefore, the power balance can be further improved through the selection of the air taken into the air conditioner.

In addition, when the temperature of the battery is excessively high, the durability of the battery is lowered as it is, and therefore, cooling of the battery has to be given priority over anything else. Therefore, when the temperature of the battery is higher than the judgment value, the air balance is normally improved by selecting the inside air and the outside air and selecting the air cooling efficiency that is better. However, a decrease in battery durability can be prevented.

However, depending on the setting of the determination value, improvement of the power balance may be given priority or battery protection may be given priority. In addition, since the battery temperature state and its cooling efficiency vary depending on the vehicle running conditions and environment, even if the above judgment value is appropriate under certain conditions, the value is inappropriate if the vehicle usage changes. It may become. Even in such a case, such a judgment value may be reduced as the frequency of the battery temperature becomes higher, or may be reduced as the ratio between the time when the battery is hot and the total traveling time of the vehicle is increased. For example, it is possible to optimize the balance between the improvement of the power balance and the protection of the battery in accordance with the temperature condition of the battery.

In order to accurately determine the balance between the power consumption of the air conditioner and the regenerative energy of the battery at the time of taking in the inside air and at the time of taking in the outside air, it is necessary to accurately predict the amount of power generated by the regeneration in the future Necessary. Since regenerative power generation is performed when the vehicle is decelerated or braked, the amount of power generated by regeneration increases as the vehicle speed increases or decreases more. The increase / decrease degree of the vehicle speed can be obtained from the standard deviation of the vehicle speed and the average vehicle speed. Therefore, by calculating the power balance using the predicted value of the amount of power generated by regeneration, which is obtained based on the standard deviation of the vehicle speed and the average vehicle speed, the power balance is predicted more accurately, and more The power balance can be improved effectively.

In order to achieve the above object, another air conditioner control device according to the present invention is mounted on a vehicle that cools a battery with air sucked from the passenger compartment, and the air taken in from the passenger compartment or outside the passenger compartment is taken into the passenger compartment. In the control device of the air conditioner capable of switching the intake air between the inside air and the outside air, the amount of increase in the regenerative power amount, which is the amount of power charged in the battery through regeneration, is changed by switching the intake air. The air to be taken in is switched when the air-conditioning power consumption that is the amount of power consumed by the air is exceeded.

When the increase in regenerative power (the amount of power charged to the battery through regeneration) due to switching of air taken into the air conditioner is greater than the increase in air conditioning power consumption (power consumed by the air conditioner), switch By doing so, the power balance between the air conditioning power consumption of the air conditioner and the regenerative power consumption of the battery is improved. On the other hand, when the amount of regenerative power increase due to switching of the air taken into the air conditioner is smaller than the increase in air conditioning power consumption, by switching, the air conditioning power consumption of the air conditioner and the regenerative power amount of the battery are reduced. The power balance deteriorates.

In that respect, in the present invention, the switching is performed when the increase amount of the regenerative electric power according to the switching of the air taken into the air conditioner exceeds the increase amount of the air conditioning power consumption. Therefore, in the present invention, air having a better power balance is selected from the outside air and the inside air, and air is taken in, and the power balance is further improved through selection of air to be taken into the air conditioner. be able to.

In addition, when the temperature of the battery is excessively high, the durability of the battery is lowered as it is, and therefore, cooling of the battery has to be given priority over anything else. Therefore, when the temperature of the battery is higher than the judgment value, it is usually determined by switching whether or not the air to be taken in is switched depending on whether or not the cooling efficiency of the battery is better, A decrease in battery durability can be prevented.

In addition, if such a judgment value is made smaller as the frequency of the battery temperature is higher, or smaller as the ratio between the time when the battery is hot and the total traveling time of the vehicle becomes larger, According to the temperature situation, it is possible to appropriately adjust the balance between the improvement of the power balance and the protection of the battery.

In addition, in order to accurately obtain the regenerative electric energy of the battery when the air taken into the air conditioner is switched, it is necessary to accurately predict the electric energy generated by the regeneration in the future. As described above, the amount of electric power generated by regeneration can be predicted from the standard deviation of the vehicle speed and the average vehicle speed. Therefore, using the predicted value of the amount of electric power generated by regeneration, which is obtained based on the standard deviation of the vehicle speed and the average vehicle speed, the amount of increase in the regenerative power amount of the battery when the air taken into the air conditioner is switched By performing the calculation, the power balance can be improved more effectively.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic which shows typically the structure of the vehicle air conditioner and battery cooling device to which one embodiment of this invention is applied. The schematic diagram which shows typically the structure of the air conditioner of the embodiment. The graph which shows the relationship between the average vehicle speed and the electric energy generated by regeneration in each of (a) when the standard deviation of the vehicle speed is large, (b) medium, and (c) small. The graph which shows the relationship between the electric energy which generate | occur | produces by regeneration in each when charging limit value is large, when it is medium, and the electric energy charged to a battery through regeneration. The flowchart which shows the process sequence of the air intake switching control based on an electric power balance. The graph which shows an example of transition of battery temperature deterioration time / total traveling time. The graph which shows the selection aspect of the air intake selection control according to battery temperature deterioration time / total running time, and battery temperature.

Hereinafter, an embodiment of a control device for an air conditioner according to the present invention will be described in detail with reference to FIGS. In addition, the control apparatus of the air conditioner which concerns on this Embodiment is applied to the air conditioner mounted in the hybrid vehicle provided with two drive sources, an electric motor and an internal combustion engine.

As shown in FIG. 1, an air conditioner 1 mounted on a hybrid vehicle has an outside air intake port 2 for taking in air outside the vehicle, that is, outside air, and air inside the vehicle, that is, inside air, as air intake ports. Two air intake ports, the inside air intake port 3 for intake, are provided. The air conditioner 1 heats or cools the air taken in from any one of these air intakes, and sends the air to the vehicle compartment from the air outlet 4 opened in the vehicle compartment.

Also, this hybrid vehicle is equipped with a battery 5 that stores electric power supplied to an electric motor or the like. The hybrid vehicle is provided with a battery cooling blower 7 for blowing air sucked from a suction port 6 opened in the vehicle compartment to the battery 5 in order to cool the battery 5.

The battery 5 is controlled by a battery ECU (Electronic Control Unit) 8. The battery ECU 8 monitors the state of the battery 5 and performs control so that the charged state is appropriately maintained. The battery ECU 8 receives detection results such as a battery temperature sensor 9 that detects the temperature of the battery 5 and a vehicle speed sensor 10 that detects the vehicle speed.

The battery ECU 8 is connected to an air conditioning ECU 11 that controls the air conditioner 1 through an in-vehicle network. The air conditioning ECU 11 receives detection results such as an outside air temperature sensor 12 that detects the temperature of the outside air and an inside air temperature sensor 13 that detects the temperature of the inside air.

On the other hand, as shown in FIG. 2, the air conditioner 1 is provided with an inside / outside air switching door 14 for switching between the outside air inlet 2 and the inside air inlet 3 to take in air, and downstream thereof. A blower 15 for taking in and blowing out air is installed. A cooler evaporator 16 for cooling the air taken in by the heat of vaporization due to the evaporation of the refrigerant is provided downstream of the blower 15. Further, downstream of the cooler evaporator 16, the mixing ratio of the heater unit 17 that heats the air taken in by the exhaust heat of the internal combustion engine and the cool air cooled by the cooler evaporator 16 and the warm air heated by the heater unit 17 is changed. An air mix door 18 is provided.

The air conditioner 1 has a defroster 4a for blowing the temperature-adjusted air on the window to remove the fogging, and the temperature-adjusted air. There are provided three types of air outlets: a register 4b that blows out toward the upper body of the occupant and a foot outlet 4c that blows out temperature-controlled air toward the lower body of the occupant. In front of each air outlet, mode switching doors 19 to 21 are provided for switching the air outlet that performs air blowing.

When the air conditioner 1 is operated in the auto mode, the switching of the air intake port of the air conditioner 1 between the outside air intake port 2 and the inside air intake port 3 is automatically performed according to the situation at that time. To be done. Further, when the air conditioner 1 is operated in the manual mode, the air intake is switched manually by operating the air conditioning operation panel of the occupant. In such a case, the air intake can be switched as necessary. Switching may be forced. In the present embodiment, such switching control of the air intake port of the air conditioner 1 is performed by the battery ECU 8. Hereinafter, details of such air intake port selection control of the battery ECU 8 will be described.

If the air whose temperature is closer to the set temperature of the air conditioner 1 is taken in, the load on the air conditioner 1 can be reduced and the power consumption can be reduced. In general, when the air conditioner 1 is operated, the temperature of the inside air is brought close to the set temperature of the air conditioner 1, so that the air conditioner 1 is taking in the inside air rather than taking in the outside air. The amount of power consumption is reduced.

On the other hand, in the hybrid vehicle equipped with the control device for the air conditioner according to the present embodiment, power is generated by regeneration of the electric motor when the vehicle is decelerated or braked, and the generated power is charged in the battery 5. . Here, as described above, in this hybrid vehicle, the inside air is sent to the battery 5, thereby cooling the battery 5. In such a vehicle, the temperature of the air sucked from the suction port 6 for cooling the battery 5 changes depending on whether the inside air or the outside air is taken into the air conditioner 1. In which case the temperature of the air sucked from the suction port 6 becomes lower depends on the position where the suction port 6 is installed, but in this hybrid vehicle, the outside air is taken in more than when the inside air is taken in. The temperature of the air sprayed on the battery 5 becomes lower when the vehicle is on.

On the other hand, when the temperature of the battery 5 increases, the amount of charge of the battery 5 is limited in order to avoid a decrease in the durability of the battery 5 due to overheating. When the amount of charge of the battery 5 is limited, only a part of the power generated by regeneration can be charged to the battery 5, and the amount of power charged to the battery 5 through regeneration (hereinafter referred to as regenerative power amount) is reduced. It will decrease.

Even if the power consumption of the air conditioner 1 increases, if the regenerative power generation amount of the battery 5 further increases, the power balance of the battery 5 is improved. Therefore, in order to optimize the power consumption capacity of the entire vehicle, the air intake port of the air conditioner 1 is switched in consideration of only the power consumption of the air conditioner 1 or only the cooling capacity of the battery 5. However, it is necessary to switch the air intake port in consideration of the total power balance.

Therefore, in the present embodiment, the battery ECU 8 selects the air intake ECU 11 to select the one that improves the power balance between the regenerative power amount of the battery 5 and the power consumption amount of the air conditioner 1 from the inside air and the outside air. To let them do it. More specifically, the battery ECU 8 calculates the amount of increase in the amount of regenerative power of the battery 5 and the amount of power consumption of the air conditioner 1 when the air intake is switched. The battery ECU 8 switches the air intake port when the increase amount of the regenerative power amount of the battery 5 exceeds the increase amount of the power consumption amount of the air conditioner 1, and otherwise, the air intake amount The mouth is not switched.

(Calculation of air conditioning power consumption increase A)
The increase amount A of the power consumption of the air conditioner 1 (hereinafter referred to as air conditioning power consumption) by switching the air intake port is calculated by the air conditioning ECU 11 in the following manner.

That is, when calculating the increase amount A, first, the current air-conditioning power consumption LB is measured. Next, when the air intake port is switched, the temperature of the air taken into the air conditioner 1 is measured, and the air intake port is switched based on the difference between the measured air temperature and the set temperature of the air conditioner 1. The air conditioning power consumption amount LA is calculated. Then, the increase A is calculated as a value obtained by subtracting the current air conditioning power consumption LB from the air conditioning power consumption LA when the air intake port is switched. The increase amount A calculated by the air conditioning ECU 11 is transmitted to the battery ECU 8 through the in-vehicle network.

(Calculation of increase amount B of regenerative power generation of battery 5)
The increase amount B of the regenerative power generation amount of the battery 5 due to the switching of the air intake port is calculated by the battery ECU 8 in the following manner.

That is, when calculating the increase amount B, first, the current battery temperature TBB is measured, and the current charging limit value Win (NOW) of the battery 5 is calculated from the measured value. The charge limit value Win of the battery 5 is a value indicating the upper limit value of the charge amount of the battery 5 that is currently allowed.

Next, the battery temperature TBA when the air intake port is switched is estimated, and the charge limit value Win (NEW) when the air intake port is switched is calculated from the estimated value.

Subsequently, the amount of power generated by regeneration of the electric motor (hereinafter referred to as regenerative power generation amount RP) is predicted. In the present embodiment, the regenerative power generation amount RP is predicted in the following manner. Since the regenerative power generation of the electric motor is performed when the vehicle is decelerated or braked, the regenerative power generation amount RP increases as the vehicle speed increases or decreases more. The increase / decrease degree of the vehicle speed can be obtained from the standard deviation of the vehicle speed and the average vehicle speed.

In the present embodiment, the vehicle speed standard deviation σ is large (FIG. 3 (a)), medium (FIG. 3 (b)), and small (FIG. 3 (c)) per unit time. A calculation map showing the relationship between the average vehicle speed and the amount of regenerative power generation RP is provided. These calculation maps are obtained from the experimental results and are stored in the memory of the battery ECU 8. Then, using a calculation map corresponding to the standard deviation σ of the current vehicle speed per unit time, a future regenerative power generation amount RP predicted from the current average vehicle speed per unit time is obtained.

Thereafter, a future regenerative electric energy RB that is predicted when the air intake is not switched is calculated from the current charge limit value Win (NOW) and the predicted regenerative electric power generation RP. Further, the future regenerative electric energy RA predicted when the air intake is switched is calculated from the charge limit value Win (NEW) when the air intake is switched and the regenerative power generation amount RP. As shown in FIG. 4, the smaller the charging limit value Win, that is, the more severe the restriction on charging of the battery 5, the smaller the ratio between the regenerative power amounts RB and RA and the regenerative power generation amount RP.

Then, the increase amount B is calculated as a value obtained by subtracting the regenerative power amount RB when the air intake port is not switched from the regenerative power amount RA when the air intake port is switched.

(Determining whether the air intake port of the air conditioner 1 can be switched)
As described above, the increase amount A of the air-conditioning power consumption by switching the air intake port of the air conditioner 1 and the increase amount B of the regenerative power amount of the battery 5 are calculated. The battery ECU 8 determines whether or not to switch the air intake port of the air conditioner 1 according to the magnitude relationship between the increase amount A and the increase amount B.

Here, if the increase amount B of the regenerative power amount of the battery 5 due to the switching of the air intake port of the air conditioner 1 exceeds the increase amount A of the air conditioning power consumption amount due to the switching, by switching the air intake port, The power balance between the regenerative power amount of the battery 5 and the air conditioning power consumption amount will be improved. Therefore, at this time, the battery ECU 8 instructs the air conditioning ECU 11 to switch the air intake port.

On the other hand, if the increase B in the regenerative power amount of the battery 5 due to the switching of the air intake port of the air conditioner 1 is less than the increase A of the air conditioning power consumption due to the switching, the battery is switched by switching the air intake port. The power balance between the regenerative power amount of 5 and the air conditioning power consumption amount will deteriorate. Accordingly, at this time, the battery ECU 8 does not instruct the air conditioning ECU 11 to switch the air intake port, and maintains the air intake port of the air conditioner 1 as it is.

(Selection control of air intake based on power balance)
Then, the content of the specific process of selection control of the air intake based on the electric power balance implemented with the above aspect is demonstrated. The flowchart shown in FIG. 5 shows the processing procedure of the battery ECU 8 in the air intake selection control based on such a power balance. Note that the processing of this flowchart is repeatedly executed by the battery ECU 8 at regular control intervals.

Now, when the process of this control is started, it is first determined in step S100 whether or not the air conditioner 1 is in operation. If the air conditioner 1 is stopped (S100: NO), the current process is terminated as it is.

On the other hand, if the air conditioner 1 is in operation (S100: YES), the current air conditioning power consumption LB is measured in step S101. In the subsequent step S102, the air-conditioning power consumption LA when the air intake port is switched is calculated. In the subsequent step S103, the air conditioning power consumption per unit time when the air intake port is switched as a value obtained by subtracting the current air conditioning power consumption amount LB from the air conditioning power consumption amount LA when the air intake port is switched. An amount increase A is calculated.

In the next step S104, the current battery temperature TBB is measured, and the current charge limit value Win (NOW) is calculated from the measured value. In the next step S105, the battery temperature TBA when the air intake port is switched is estimated, and in the subsequent step S106, the charge limit value Win (NEW) when the air intake port is switched is calculated from the estimated value. Calculated.

In the next step S107, the regenerative electric energy RB of the battery 5 when the air intake port of the air conditioner 1 is maintained as it is is predicted from the current charge limit value Win (NOW) and the regenerative electric power generation RP. . In the subsequent step S108, the regenerative power amount of the battery 5 when the air intake port of the air conditioner 1 is switched from the charge limit value Win (NEW) when the air intake port is switched and the regenerative power generation amount RP. RA is predicted. In the next step S109, the increase amount B of the regenerative power amount of the battery 5 when the air intake port is switched is calculated as a value obtained by subtracting the regenerative power amount RB from the regenerative power amount RA.

Thereafter, in step S110, the increase amount A of the air-conditioning power consumption per unit time when the air intake port is switched is subtracted from the increase amount B of the regenerative power amount of the battery 5 when the air intake port is switched. It is determined whether or not the value (BA) is a positive value. The value obtained by subtracting the increase amount A from the increase amount B (BA) here means an increase in the power balance between the regenerative power amount of the battery 5 and the air conditioning power consumption amount when the air intake port is switched. The value represents the quantity.

Here, if the value obtained by subtracting the increase amount A from the increase amount B is a positive value (S110: YES), the air intake port is switched through a command to the air conditioning ECU 11 in step S111. On the other hand, if the value obtained by subtracting the increase A from the increase B is not a positive value (S110: NO), the air intake is not switched, and as a result, the current air intake is maintained ( Step S112).

(When battery is hot)
By the way, when the temperature of the battery 5 is excessively high, the durability of the battery 5 is lowered as it is, and therefore cooling of the battery 5 must be given priority over anything else. Therefore, the battery ECU 8 at this time does not perform the air intake switching control considering the improvement of the power balance as described above, and the cooling efficiency of the battery 5 from the outside air intake 2 and the inside air intake 3 is determined. The air conditioner 1 is made to take in air by selecting the one that becomes better. Specifically, when the current battery temperature TBB is higher than the determination value α, an air conditioner is selected from the outside air intake port 2 and the inside air intake port 3 to select a better cooling efficiency of the battery 5. 1 air is taken in. As described above, in the present embodiment, when the battery temperature is high, the air intake selection control is switched from the control based on the power balance to the control based on the cooling efficiency of the battery 5.

Note that, depending on the setting of the determination value α, improvement of the power balance may be given too much priority, or battery protection may be given too much priority. In addition, since the temperature state of the battery 5 and its cooling efficiency vary depending on the traveling state and environment of the vehicle, even if the determination value α is an appropriate value under certain conditions, the value may not be valid if the usage mode of the vehicle changes. It may become appropriate.

Therefore, in the present embodiment, the determination value α is set to a smaller value as the frequency at which the battery temperature TBB becomes higher is higher. In the present embodiment, as an index value of the frequency at which the battery temperature TBB becomes high, the ratio β between the time when the battery 5 is at a high temperature (battery temperature deterioration time) and the total travel time of the vehicle is used. ing. For example, as shown in FIG. 6, when the ratio β increases, the determination value α is set to a smaller value. Thereafter, when the ratio β decreases, the determination value α is returned to a larger value.

In this embodiment, the air intake port between the control based on the cooling efficiency of the battery 5 and the control based on the power balance in the mode shown in FIG. 7 based on the battery temperature TBB and the ratio β. The selection is switched. That is, as the ratio β increases, the determination value α is set to a smaller value, and air intake selection control based on the cooling efficiency of the battery 5 is performed at a lower battery temperature TBB.

According to the control device for an air conditioner of the present embodiment described above, the following effects can be obtained.

(1) In the present embodiment, air is taken in by selecting a better one in the power balance between the regenerative power amount of the battery 5 and the air-conditioning power consumption, among the inside air and the outside air. More specifically, the amount of increase in the regenerative power amount and the air conditioning power consumption amount of the battery 5 when the intake air is switched is obtained. When the increase amount B of the regenerative power amount of the battery exceeds the increase amount A of the air conditioning power consumption amount, switching of the air to be taken in is performed, and when it is lower, switching of the air to be taken in is not performed. Therefore, the power balance can be further improved through the selection of the air taken into the air conditioner 1.

(2) In the present embodiment, when the temperature of the battery 5 is higher than the determination value α, it is determined whether or not the air to be taken in is switched depending on whether or not the cooling efficiency of the battery 5 is improved. As a result, the air is taken in by selecting the one of the inside air and the outside air that has a better cooling efficiency of the battery 5. Therefore, it is possible to prevent a decrease in battery durability while improving the power balance.

(3) In the present embodiment, the determination value α is set to a smaller value as the frequency at which the temperature of the battery 5 becomes higher is obtained from the ratio β between the battery temperature deterioration time and the total travel time of the vehicle. Yes. Therefore, it is possible to optimize the balance between the improvement of the power balance and the protection of the battery according to the temperature condition of the battery 5.

(4) In the present embodiment, the increase amount B of the regenerative power amount of the battery 5 is calculated using the predicted value of the regenerative power amount obtained based on the standard deviation of the vehicle speed and the average vehicle speed. Then, using the value obtained by subtracting the increase amount A of the air-conditioning power consumption amount from the calculated increase amount B of the regenerative power amount of the battery 5, it is determined whether or not to switch the air intake port. Therefore, the power balance can be improved more effectively.

The above embodiment can be implemented with the following modifications.

In the above embodiment, the regenerative power generation amount RP that is a predicted value of the amount of power generated by regeneration is calculated based on the standard deviation of the vehicle speed and the average vehicle speed. The regenerative power generation amount RP may be calculated in a calculation mode other than these modes. For example, it is possible to obtain vehicle route information from a car navigation system, predict a travel pattern of the vehicle from the route information, and calculate the regenerative power generation amount RP based on the prediction result. Further, when it can be assumed that the state of the future regenerative power generation does not change significantly from the current state, the current regenerative power generation amount can be used as it is as the regenerative power generation amount RP.

In the above embodiment, the determination value α relating to the switching of the air intake selection control between the control based on the power balance and the control based on the cooling efficiency of the battery 5 is frequently performed in a state where the battery temperature is high. The smaller the value was. When the change in the temperature state of the battery 5 due to the traveling state or environment of the vehicle is sufficiently small, the determination value α may be a fixed value.

In the above embodiment, the control based on the power balance and the control based on the cooling efficiency of the battery 5 are switched according to the battery temperature TBB. However, the temperature of the battery 5 can be increased only by the control based on the power balance. If it can be sufficiently prevented, only air intake selection control based on the power balance may be performed regardless of the battery temperature TBB.

The configuration of the cooling device for the battery 5 by the air sucked from the air conditioner 1 or the passenger compartment in the above embodiment may be changed as appropriate. In short, the control device of the present invention is mounted on a vehicle that cools a battery with air sucked from the passenger compartment, blows air taken from the passenger compartment or the outside of the passenger compartment to the passenger compartment, and is an internal air that is air in the passenger compartment. Any air conditioner can be used as long as it can switch the air taken into the outside air that is outside the passenger compartment.

In the above embodiment, the case where the control device of the present invention is applied to an air conditioner mounted on a hybrid vehicle has been described, but the present invention is a vehicle that cools a battery with air sucked from a passenger compartment. It can be applied to any vehicle.

DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2 ... Outside air intake port, 3 ... Inside air intake port, 4 ... Air blower port (4a ... Defroster, 4b ... Register, 4c ... Foot outlet), 5 ... Battery, 6 ... Suction port, 7 ... Battery cooling blower, 8 ... Battery ECU, 9 ... Battery temperature sensor, 10 ... Vehicle speed sensor, 11 ... Air conditioning ECU, 12 ... Outside air temperature sensor, 13 ... Inside air temperature sensor, 14 ... Inside / outside air switching door, 15 ... Blower, 16 ... cooler evaporator, 17 ... heater unit, 18 ... air mix door, 19-21 ... mode switching door.

Claims (10)

It is mounted on a vehicle that cools the battery with air sucked from the passenger compartment, and air taken in from the passenger compartment or outside the passenger compartment is blown into the passenger compartment, and air inside the passenger compartment and outside air that is outside the passenger compartment In the control device of the air conditioner that can switch the air taken in
Of the inside air and the outside air, air intake is selected by selecting a better electric power balance between the amount of power charged to the battery through regeneration and the amount of power consumed by the air conditioner. Air conditioner control device. The control of the air conditioner according to claim 1, wherein when the temperature of the battery is higher than a determination value, air is taken in by selecting a better cooling efficiency of the battery from the inside air and the outside air. apparatus. The control device for an air conditioner according to claim 2, wherein the determination value is decreased as the frequency at which the temperature of the battery is high is increased. The control device for an air conditioner according to claim 2, wherein the determination value is decreased as a ratio between a time during which the battery is at a high temperature and a total travel time of the vehicle is increased. The air conditioner according to any one of claims 1 to 4, wherein the power balance is calculated using a predicted value of the amount of electric power generated by regeneration, which is obtained based on a standard deviation of vehicle speed and an average vehicle speed. Control device. It is mounted on a vehicle that cools the battery with air sucked from the passenger compartment, and air taken in from the passenger compartment or outside the passenger compartment is blown into the passenger compartment, and air inside the passenger compartment and outside air that is outside the passenger compartment are In the control device of the air conditioner that can switch the air taken in
Switching of the air to be taken in when the increase in the amount of regenerative power that is the amount of power charged to the battery through regeneration exceeds the air conditioning power consumption that is the amount of power consumed by the air conditioner by switching the air to be taken in A control device for an air conditioner, wherein The control device for an air conditioner according to claim 6, wherein when the temperature of the battery is higher than a determination value, it is determined whether or not to change the air to be taken in depending on whether or not the cooling efficiency of the battery is improved. The control device for an air conditioner according to claim 7, wherein the determination value is decreased as the frequency at which the temperature of the battery is high is increased. The control device for an air conditioner according to claim 7, wherein the determination value is decreased as a ratio between a time during which the battery is high temperature and a total travel time of the vehicle is increased. The increase amount of the regenerative electric energy is calculated using a predicted value of the electric energy generated by regeneration, which is obtained based on the standard deviation of the vehicle speed and the average vehicle speed. Air conditioner control device.

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