JP2012044766A - Battery controller and vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized and light-weighted battery controller, and to provide a vehicle incorporating the same.SOLUTION: A battery controller 1 designed to regulate charging and discharge of a battery B that is capable of charging electric power supplied by an external power source PS, includes: a switcher 13 that switches the state where the battery B is electrically connected to a motor MT to the state where it is electrically connected to the external power source PS and vice versa; a power inverter circuit 12 that is provided between the battery B and the switcher 13 and can perform a first conversion for converting DC power from the battery B into AC power and a second conversion for converting AC power from the external power source PS into DC power; and a control circuit 18 that makes the power inverter circuit 12 perform the first conversion so as to perform a drive control of the motor MT when the motor MT is electrically connected to the battery B, and makes the power inverter circuit 12 perform the second conversion so as to perform a charge control of the battery B when the external power source PS is electrically connected to the battery B.

Description

  The present invention relates to a battery control device that controls charging / discharging of a battery that can be charged by electric power supplied from an external power source, and a vehicle including the device.

  In recent years, in order to realize a low-carbon society, research on hybrid vehicles (HV) that use both an engine and a motor as a power generation source and electric vehicles (EV: Electric Vehicle) that use only a motor as a power generation source has been active. Has been done. These hybrid vehicles and electric vehicles include a secondary battery (battery) such as a rechargeable lithium ion secondary battery that supplies electric power to the motor.

  An electric vehicle can be basically charged by attaching an external charging device to the electric vehicle. In addition, a so-called plug-in hybrid vehicle among hybrid vehicles includes a charging device (plug-in charging device) by itself, unlike an electric vehicle. For this reason, the plug-in hybrid vehicle can charge the battery by inserting a plug of an external power source (for example, a commercial AC power source having a voltage of 200 V) into an insertion port of the plug-in charging device.

  A charging device used for charging a battery included in an electric vehicle includes, for example, a PWM (Pulse Width Modulation) converter, a PWM inverter, and a rectifier, and is necessary for charging the battery from a commercial AC power supply having a voltage of 200V. DC power is generated. Therefore, when the charging device is attached to the electric vehicle, the DC power generated by the charging device is supplied to the electric vehicle and the battery is charged.

  A plug-in charging device included in a plug-in hybrid vehicle includes, for example, a PWM converter and a DC / DC converter, and generates direct-current power necessary for charging a battery from power supplied from an external power source. Therefore, when the plug of the external power supply is inserted into the insertion port of the plug-in charging device, DC power for charging the battery is generated by the plug-in charging device and the battery is charged. Patent Document 1 below discloses an example of a vehicle that includes a plug-in charging device and can charge a battery from the outside.

JP 2009-201197 A

  By the way, as the weight of the vehicle becomes heavier, more energy is required to accelerate and decelerate the vehicle, and thus fuel consumption generally tends to decrease. For this reason, measures are taken to reduce the weight of the vehicle in a vehicle type where fuel efficiency is important. Since the plug-in charging device described above is always mounted on a vehicle such as a plug-in hybrid vehicle where fuel efficiency is important, it is desirable that the plug-in charging device be as small and light as possible.

  Moreover, since a plug-in charging device is not used except at the time of the charge of the battery provided in the vehicle, an operation rate is low. If the plug-in charging device can be used other than charging the battery and can be shared with other devices that control the battery (for example, a device that controls the discharge amount of the battery), the plug-in charging device can be used. It is considered that the operation rate of the plug-in charging device can be simplified, the device configuration can be simplified, and the plug-in charging device can be reduced in size and weight.

  This invention is made | formed in view of the said situation, and aims at providing the vehicle provided with the battery control apparatus which is small and lightweight, and the said apparatus.

In order to solve the above problems, a battery control device according to the present invention is a battery control device (1, 2) that controls charging / discharging of a battery (B) that can be charged by electric power supplied from an external power supply (PS). And a switching unit (13) for switching whether the motor (MT) is electrically connected to the battery or the external power source is electrically connected to the battery, and is provided between the battery and the switching unit. A power conversion unit (12) capable of performing a first conversion for converting DC power from the battery into AC power and a second conversion for converting AC power from the external power source into DC power; When the motor is electrically connected, the power conversion unit performs the first conversion to perform drive control of the motor, and when the external power source is electrically connected to the battery, the power Conversion unit It is characterized by a control unit which controls charging of the battery by the second conversion (18, 50).
The battery control device of the present invention further includes a phase detection unit (15) that detects a phase of AC power from the external power source, and the control unit uses the detection result of the phase detector to detect the battery. The charge control is performed.
In the battery control device of the present invention, the AC power from the external power source and the AC power converted by the first conversion by the power converter and supplied to the motor are three-phase AC power. It is a feature.
Moreover, the battery control apparatus of the present invention is characterized in that the external power source is connected to the power conversion unit via a reactor (14) provided for each phase.
The battery control device of the present invention is provided between the battery and the power conversion unit, and converts the voltage of the DC power converted by the second conversion in the power conversion unit to a voltage suitable for the battery. It is characterized by including a pressure-lowering device (40) for lowering.
The vehicle according to the present invention is a vehicle including a motor (MT) as a power generation source and a battery (B) that can be charged by electric power supplied from an external power source (PS) and supplies electric power to the motor. The battery control device according to any one of the above aspects that controls charging / discharging of the battery is provided.

  According to the present invention, the switching unit can switch which of the motor and the external power source is connected to the battery, and the first conversion for converting the DC power from the battery into the AC power and the AC power from the external power source can be switched. A power conversion unit capable of second conversion to convert to DC power is provided, and when a motor is connected to the battery, the control unit causes the power conversion unit to perform the first conversion and performs drive control of the motor. When an external power source is connected, the control unit causes the power conversion unit to perform AC / DC conversion and performs battery charging control. For this reason, since a power converter can be shared by the case where the drive control of a motor is performed, and the case where the charge control of a battery is performed, there exists an effect that a battery control apparatus can be made small and lightweight.

It is a circuit diagram which shows the principal part structure of the battery control apparatus by 1st Embodiment of this invention. It is a circuit diagram which shows the principal part structure of the battery control apparatus by 2nd Embodiment of this invention.

  Hereinafter, a battery control device and a vehicle according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following, it is assumed that the vehicle is a plug-in hybrid vehicle, and the battery control device controls charging / discharging of a battery provided in the plug-in hybrid vehicle.

[First Embodiment]
FIG. 1 is a circuit diagram showing a main configuration of the battery control apparatus according to the first embodiment of the present invention. As shown in FIG. 1, the battery control device 1 of the present embodiment includes a capacitor 11, a power conversion circuit 12 (power conversion unit), a switch 13 (switching unit), a reactor 14, a phase detection circuit 15 (phase detection unit), A current sensor 16, a voltage sensor 17, and a control circuit 18 (control unit) are provided, and charge / discharge of the battery B is controlled.

  Here, the battery B is a secondary battery such as a lithium ion secondary battery provided in the plug-in hybrid vehicle, and can be charged by the power supplied from the external power source PS. Electric power is supplied to a motor MT as a power generation source provided in the motor. The external power source PS is a commercial AC power source that supplies, for example, three-phase AC power with a voltage of 200 V, and is inserted into a charging port (not shown) provided in the plug-in hybrid vehicle, As shown in FIG. 1, the reactor 14 and the phase detection circuit 15 are connected.

  The capacitor 11 is connected between the positive electrode and the negative electrode of the battery B, and smoothes the electric power supplied from the external power source PS and rectified by the power conversion circuit 12 when the battery B is charged into DC power. Provided for. The power conversion circuit 12 is provided between the capacitor 11 and the switch 13, and converts the DC power from the battery B to AC power (three-phase AC power) under the control of the control circuit 18. Conversion (first conversion) or AC / DC conversion (second conversion) for converting AC power (three-phase AC / AC power) from the external power source PS into DC power is performed. The AC power obtained by the DC / AC conversion is output to the switch 13 side, and the DC power obtained by the AC / DC conversion is output to the battery B side.

  The power conversion circuit 12 includes transistors 21a to 21f and diodes 22a to 22f. The transistors 21 a to 21 f are bipolar transistors, and the on state and the off state are controlled by the control circuit 18. Note that FET transistors (Field Effect Transistors) may be used as the transistors 21a to 21f.

  Transistors 21a, 21c, and 21e have collector electrodes connected to one electrode of capacitor 11, and emitter electrodes connected to collector electrodes of transistors 21b, 21d, and 21f, respectively. The transistors 21b, 21d, and 21f have emitter electrodes connected to the other electrode of the capacitor 11. Base electrodes of these transistors 21 a to 21 f are connected to the control circuit 18. The diodes 22a to 22f are connected between the collectors and emitters of the transistors 21a to 21f, respectively.

  By causing each of the transistors 21a to 21f to perform a switching operation (for example, a PWM switching operation) according to a preset rule, the DC power from the battery B is converted into AC power and output to the switch 13. Such DC / AC conversion is performed under the control of the control circuit 18 when the motor MT is electrically connected to the battery B by the switch 13.

  On the other hand, when AC power (AC power from the external power supply PS) is supplied from the switch 13 when the transistors 21a to 21f are all in the OFF state, the AC power is rectified by the diodes 22a to 22f and is then connected to the capacitor. 11 is converted into DC power by being smoothed and output to the battery B. Here, even when AC / DC conversion is performed in the power conversion circuit 12, the switching operation of the transistors 21a to 21f is performed when the power conversion amount is controlled. Note that such AC / DC conversion is performed under the control of the control circuit 18 when the external power source PS is electrically connected to the battery B by the switch 13.

  The switch 13 switches whether the motor MT is connected to the power conversion circuit 12 or the external power supply PS is connected to the power conversion circuit 12 under the control of the control circuit 18. Here, when the motor MT is connected to the power conversion circuit 12, the motor is electrically connected to the battery B, and when the external power source PS is connected to the power conversion circuit 12, the battery B is connected. The external power source PS is electrically connected.

  In the present embodiment, an example in which switching of the switch 13 is controlled by the control circuit 18 will be described, but the switching control is not necessarily performed by the control circuit 18. For example, a switch for detecting whether or not a plug is inserted in a charging port (not shown) is provided, and when this switch is turned on, the switching of the switch 13 is automatically mechanically or electrically. It may be performed automatically.

  The reactor 14 is for preventing an inrush current flowing when a plug is inserted in the insertion port, and is provided for each phase between the switch 13 and a charging insertion port (not shown). Yes. That is, the external power supply PS is connected to the power conversion circuit 12 via the reactor 14 provided for each phase. The phase detection circuit 15 detects the phase of each phase of AC power supplied from the external power supply PS when a plug is inserted into a charging port (not shown). The detection result of the phase detection circuit 15 is also used to determine whether or not a plug is inserted into the charging port (not shown).

  The current sensor 16 is attached to a current path connected to the positive electrode of the battery B, and detects a current flowing out from the battery B (discharge current) and a current flowing into the battery B (charging current). The voltage sensor 17 is attached in parallel to the capacitor 11 and detects the potential difference of the capacitor 11 (the voltage of the battery B). Detection signals indicating detection results of the current sensor 16 and the voltage sensor 17 are output to the control circuit 18.

  The control circuit 18 includes a calculator 31, an automatic current controller (ACR) 32, a calculator 33, an automatic voltage regulator (AVR) 34, and a PWM controller 35. While referring to the detection results of the sensor 16 and the voltage sensor 17 and the detection result of the phase detection circuit 15, the power conversion circuit 12 is controlled so that the charge / discharge current of the battery B becomes the current indicated by the current command signal S1. Further, switching control of the switch 13 is also performed according to the detection result of the phase detection circuit 15.

  The calculator 31 subtracts the detection result of the current sensor 16 from the current command signal S1 input from the outside, thereby calculating the difference between the actual charge / discharge current of the battery B and the current value indicated by the current command signal S1. Find a current error signal. The automatic current controller 32 generates and outputs a control signal in which the current error signal output from the calculator 31 is zero. The computing unit 33 subtracts the detection result of the voltage sensor 17 from the control signal output from the automatic current controller 32, thereby obtaining the actual output voltage of the battery B and the control signal output from the automatic current controller 32. A voltage error signal which is a difference is obtained. The automatic voltage controller 34 outputs a control signal that makes the voltage error signal output from the calculator 33 zero.

  The PWM controller 35 switches each of the transistors 21a to 21f provided in the power conversion circuit 12 based on the control signal output from the automatic voltage controller 34 while referring to the detection result of the phase detection circuit 15 ( PWM switching operation). Further, the PWM controller 35 performs switching control of the switch 13 according to the detection result of the phase detection circuit 15. In the control circuit 18 described above, the charging / discharging current of the battery B is controlled by the control loop (major control loop) including the current sensor 16, the calculator 31 to the PWM controller 35, and the power conversion circuit 12, and the voltage sensor 17 The voltage control of the power conversion circuit 12 is performed by a control loop (minor control loop) including the converter 33 to the PWM controller 35 and the power conversion circuit 12.

  Next, the operation of the battery control device 1 having the above configuration will be described. The operation of the battery control device 1 is broadly divided into a driving operation when the motor MT is driven using the electric power of the battery B and a charging operation when charging the battery B using the external power source PS. Hereinafter, each operation will be described in order.

[Driving operation]
When the motor MT is driven using the power of the battery B, a plug (external power supply PS plug) is inserted into a charging port (not shown) provided in the plug-in hybrid vehicle. Absent. Therefore, since phase detection is not performed by the phase detection circuit 15, the PWM controller 35 provided in the control circuit 18 controls the switch 13 to connect the motor MT to the power conversion circuit 12. Thereby, the motor MT is electrically connected to the battery B.

  When the current command signal S1 is input in a state where the motor MT is electrically connected to the battery B, the PWM controller 35 provided in the control circuit 18 performs control output from the automatic voltage controller 34. Based on the signal, the switching operation of each of the transistors 21a to 21f provided in the power conversion circuit 12 is started. When the switching operation of the transistors 21a to 21f is started, the DC power from the battery B is converted into AC power. This AC power is supplied to the motor MT via the switch 13, and the motor MT is thereby driven.

  Here, when the value of the current value indicated by the current command signal S1 increases, the duty ratio, which is the ratio between the length of the switching cycle of the transistors 21a to 21f and the time during which the transistors 21a to 21f are on, increases. As a result, the average amount of electric power supplied to the motor MT increases, thereby increasing the rotational speed of the motor MT. On the other hand, the duty ratio decreases as the current value indicated by the current command signal S1 decreases. As a result, the average amount of electric power supplied to the motor MT decreases, and the rotational speed of the motor MT decreases accordingly. In this way, drive control of the motor M is performed.

[Charging operation]
When charging the battery B using the power from the external power source PS, the user first inserts the plug of the external power source PS into a charging port (not shown) provided in the plug-in hybrid vehicle. Then, AC power from the external power source PS is supplied to the battery control device 1 through the plug, and the phase detection circuit 15 detects the phase of the AC power. When the detection result of the phase detection circuit 15 is output to the PWM controller 35 of the control circuit 18, the PWM controller 35 controls the switch 13 to connect the external power source PS to the power conversion circuit 12. As a result, the external power source PS is electrically connected to the battery B.

  When the current command signal S1 is input while the external power source PS is electrically connected to the battery B, the PWM controller 35 provided in the control circuit 18 refers to the detection result of the phase detection circuit 15. However, based on the control signal output from the automatic voltage controller 34, the switching operation of each of the transistors 21a to 21f provided in the power conversion circuit 12 is started. Depending on the control signal output from the automatic voltage controller 34, the transistors 21a to 21f may be maintained in the off state without starting the switching operation.

  Here, in order to simplify the description, assuming that all of the transistors 21a to 21f are maintained in an off state, a three-phase full-wave rectifier circuit is configured by the diodes 22a to 22f provided in the power conversion circuit 12. The The AC power supplied from the external power source PS is input to the power conversion circuit 12 via the reactor 14, rectified by the diodes 22 a to 22 f constituting the three-phase full-wave rectifier circuit, and smoothed by the capacitor 11 to be DC. Converted to electric power. The DC power converted in this way is supplied to the battery B, and the battery B is charged.

  Here, consider a case where the switching operations of the transistors 21a to 21f are performed at a certain duty ratio. In such a case, when the value of the current value indicated by the current command signal S1 increases, the amount of power converted from AC power to DC power by the power conversion circuit 12 increases, and thereby the power used for charging the battery B The amount increases. On the other hand, when the value of the current value indicated by the current command signal S1 decreases, the amount of power converted from AC power to DC power by the power conversion circuit 12 decreases, and thereby the power used for charging the battery B The amount is reduced. In this way, charging control of the battery B is performed.

  As described above, in the present embodiment, the switch 13 that switches which of the motor MT and the external power source PS is connected to the battery B, the DC / AC conversion that converts the DC power from the battery B into AC power, and the external A power conversion circuit 12 capable of AC / DC conversion for converting AC power from the power source PS into DC power is provided. When the motor MT is connected to the battery B, the control circuit 18 controls the drive of the motor MT by causing the power conversion circuit 12 to perform DC / AC conversion, and when the external power source PS is connected to the battery B. The control circuit 18 controls the charging of the battery B by causing the power conversion circuit 12 to perform AC / DC conversion.

  Thus, in this embodiment, since the power conversion circuit 12 can be shared by both the case where the drive control of the motor MT is performed and the case where the charge control of the battery B is performed, the battery control device 1 is reduced in size and weight. be able to. Further, by providing the small and light battery control device 1 in the plug-in hybrid vehicle, the fuel efficiency of the plug-in hybrid vehicle can be improved.

[Second Embodiment]
FIG. 2 is a circuit diagram showing a main configuration of the battery control apparatus according to the second embodiment of the present invention. In FIG. 2, the same components as those shown in FIG. 1 are denoted by the same reference numerals. As shown in FIG. 2, the battery control device 2 of the present embodiment is configured by adding a DC / DC converter 40 (step-down device) to the battery control device 1 shown in FIG. 1 and replacing the control circuit 18 with a control circuit 50. It is. The power conversion circuit 12 can only perform a boosting operation when charging the battery B using power from the external power source PS. Since it is necessary to reduce the voltage applied to the battery B depending on the specification of the battery B, in this embodiment, the DC / DC converter 40 and the control circuit 50 are provided and correspond to the battery B having such a specification. .

  The DC / DC converter 40 is provided between the battery B and the capacitor 11. Under the control of the control circuit 50, the DC power supplied from the battery B or the DC power smoothed by the capacitor 11 is obtained. Perform power conversion. The DC / DC converter 40 includes a capacitor 41, a choke coil 42, transistors 43a and 43b, and diodes 44a and 44b. The capacitor 41 is connected between the positive electrode and the negative electrode of the battery B. The choke coil 42 has one end connected to one electrode of the capacitor 41 and the other end connected to a connection point between the emitter electrode of the transistor 43a and the collector electrode of the transistor 43b.

  The transistors 43 a and 43 b are bipolar transistors, and the ON state and the OFF state are controlled by the control circuit 50. Note that FET transistors may be used as the transistors 43a and 43b. The transistor 43a has a collector electrode connected to one electrode of the capacitor 11, and an emitter electrode connected to the collector electrode of the transistor 43b. The transistor 43b has an emitter electrode connected to the other electrode of the capacitor 11. The base electrodes of the transistors 43a and 43b are connected to the control circuit 50. The diodes 44a and 44b are connected between the collectors and emitters of the transistors 43a to 43b, respectively.

  The DC / DC converter 40 operates as a non-insulated boost choke converter by turning off the transistor 43a and switching the transistor 43b (for example, PWM switching operation). For this reason, the output voltage of the battery B can be boosted. This operation is performed under the control of the control circuit 50 when the motor MT is electrically connected to the battery B by the switch 13.

  On the other hand, the DC / DC converter 40 operates as a non-insulated step-down choke converter by turning off the transistor 43b and switching the transistor 43a (for example, PWM switching operation). For this reason, the voltage appearing on the capacitor 11 can be stepped down to a voltage suitable for the battery B. This operation is performed under the control of the control circuit 50 when the external power source PS is electrically connected to the battery B by the switch 13.

  The control circuit 50 includes a PWM controller 51 in addition to the arithmetic units 31 to the PWM controller 35 included in the control circuit 18 shown in FIG. However, in the control circuit 18 shown in FIG. 1, the output terminal of the automatic current controller 32 is connected to the calculator 33, but in the control circuit 50, the output terminal of the automatic current controller 32 is connected to the PWM controller 51. The intermediate voltage command signal S2 is input to the calculator 33 from the outside. That is, the control circuit 50 has a configuration in which the charge / discharge current of the battery B is controlled using the current command signal S1, and the voltage control of the power conversion circuit 12 is performed using the intermediate voltage command signal S2.

  The PWM controller 51 causes each of the transistors 43a and 43b provided in the DC / DC converter 40 to perform a switching operation (PWM switching operation) based on the control signal output from the automatic current controller 32. Specifically, when the motor MT is electrically connected to the battery B, for example, the transistor 43a is turned off and the transistor 43b is switched. On the other hand, when the external power source PS is electrically connected to the battery B, for example, the transistor 43b is turned off and the transistor 43a is controlled to perform a switching operation. Note that the duty ratio when the transistors 43a and 43b are PWM-switched is controlled according to the degree to which the voltage is stepped up or stepped down.

  The operation of the battery control device 2 in the above configuration is that the output voltage of the battery B is boosted by the DC / DC converter 40 during drive control of the motor MT, and the voltage appearing at the capacitor 11 is stepped down during charge control of the battery B. Except for this, it is basically the same as the operation of the battery control device 1 of the first embodiment. For this reason, the details of the operation of the battery control device 2 are omitted here.

  Also in the present embodiment, from the switch 13 that switches which of the motor MT and the external power source PS is connected to the battery B, the DC / AC conversion that converts the DC power from the battery B into AC power, and the external power source PS A power conversion circuit 12 capable of AC / DC conversion for converting the AC power into DC power is provided. When the motor MT is connected to the battery B, the control circuit 50 causes the power conversion circuit 12 to perform DC / AC conversion to control the drive of the motor MT, and when the external power source PS is connected to the battery B. The control circuit 50 controls the charging of the battery B by causing the power conversion circuit 12 to perform AC / DC conversion.

  As described above, also in this embodiment, the power conversion circuit 12 can be shared between the case where the drive control of the motor MT is performed and the case where the charge control of the battery B is performed, so that the battery control device 2 is reduced in size and weight. be able to. Further, by providing the small and light battery control device 2 in the plug-in hybrid vehicle, the fuel efficiency of the plug-in hybrid vehicle can be improved.

  As mentioned above, although the battery control apparatus and vehicle by embodiment of this invention were demonstrated, this invention is not restrict | limited to the said embodiment, It can change freely within the scope of the present invention. For example, in the above embodiment, an example is given in which the external power source PS supplies three-phase AC power and the power conversion circuit 12 converts DC power from the battery B into three-phase AC power. explained. However, the present invention is also applicable when the external power supply supplies single-phase AC power and the power conversion circuit converts DC power from the battery B into single-phase AC power.

  In the above embodiment, the case where the vehicle is a plug-in hybrid vehicle has been described as an example. However, the present invention can be generally applied to a vehicle including a battery that can be charged by electric power supplied from an external power source and a motor as a power generation source that generates power by the electric power supplied from the battery. For example, in addition to the plug-in hybrid vehicle described above, the present invention can also be applied to vehicles such as electric vehicles and electric heavy machinery.

DESCRIPTION OF SYMBOLS 1, 2 Battery control apparatus 12 Power conversion circuit 13 Switcher 14 Reactor 15 Phase detection circuit 18 Control circuit 40 DC / DC converter 50 Control circuit B Battery MT Motor PS External power supply

Claims (6)

A battery control device that controls charging / discharging of a battery that can be charged by electric power supplied from an external power source,
A switching unit that switches whether the motor is electrically connected to the battery or the external power source is electrically connected;
A first conversion that is provided between the battery and the switching unit and converts DC power from the battery into AC power, and a second conversion that converts AC power from the external power source into DC power is possible. A power converter,
When the motor is electrically connected to the battery, the power conversion unit performs the first conversion to perform drive control of the motor, and when the external power source is electrically connected to the battery. A control unit that controls the charging of the battery by causing the power conversion unit to perform the second conversion. It comprises a phase detector that detects the phase of AC power from the external power source,
The battery control apparatus according to claim 1, wherein the control unit performs charge control of the battery using a detection result of the phase detector.   3. The battery control according to claim 2, wherein the AC power from the external power source and the AC power converted by the first conversion by the power converter and supplied to the motor are three-phase AC power. apparatus.   The battery control device according to claim 3, wherein the external power source is connected to the power conversion unit via a reactor provided for each phase.   A step-down device that is provided between the battery and the power conversion unit and reduces the voltage of DC power converted by the second conversion in the power conversion unit to a voltage suitable for the battery; The battery control device according to any one of claims 1 to 4. A vehicle including a motor as a power generation source and a battery that can be charged by electric power supplied from an external power source and supplies electric power to the motor,
A vehicle comprising the battery control device according to any one of claims 1 to 5, which controls charging and discharging of the battery.

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