Vehicle Battery Charging Control Device

Abstract

To provide a vehicle battery charging control device capable of preventing a time until external charging starts from becoming longer while enabling supplementary charging and external charging.SOLUTION: A supplementary charging device is provided that performs supplementary charging for charging a low-voltage battery with output power of a high-voltage battery. When an external charging start condition is established in a state where supplementary charging is not being performed, external charging start control is started after a first time has elapsed since the external charging start condition is satisfied. When the external charging start condition is established during implementation of supplementary charging, stop control for stopping the supplementary charging device, information erasing control for erasing multiple pieces of information, and update control for updating at least part of the erased information are carried out, and the external charging start control is started after a second time longer than the first time has elapsed since the external charging start condition is established.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to a battery charging control device for a vehicle, which is connected to a power supply device having a motor as a drive source, a high-voltage battery that supplies power to the motor, a low-voltage battery having an output voltage lower than that of the high-voltage battery, and a charger provided outside the vehicle, and realizes external charging for charging the high-voltage battery by the power supply device.

Background Art

[0002] Conventionally, in a vehicle equipped with a motor as a drive source, a high-voltage battery and a low-voltage battery having an output voltage lower than that of the high-voltage battery are mounted. The high-voltage battery supplies power to the motor, and the low-voltage battery supplies power to devices such as a controller and an audio. For example, Patent Document 1 discloses a vehicle including a motor generator as a drive source, a high-voltage battery (main battery in Patent Document 1) that supplies power to the motor generator, and a low-voltage battery (auxiliary battery in Patent Document 1) having an output voltage lower than that of the high-voltage battery, and configured to charge the low-voltage battery with the high-voltage battery at regular intervals after the ignition switch is turned off.

[0003] Also, conventionally, in a part of a vehicle including a motor as a drive source and a high-voltage battery that supplies power to the motor, external charging for charging the high-voltage battery by a power supply device outside the vehicle using a charger outside the vehicle has been made possible.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a vehicle equipped with a motor as a drive source, a high-voltage battery, and a low-voltage battery, if both supplementary charging in which the low-voltage battery is charged by the high-voltage battery and the above-described external charging are enabled, the charge amounts of both the high-voltage battery and the low-voltage battery can be ensured.

[0006] However, if a control sequence for supplementary charging and a control sequence for external charging are simply constructed and configured to execute these control sequences, when a condition for starting external charging is satisfied during the execution of supplementary charging, the control sequence for supplementary charging and the control sequence for external charging may interfere with each other, and there is a risk that supplementary charging or external charging may not be appropriately performed. Therefore, when a condition for starting external charging is satisfied during the execution of supplementary charging, it is desirable to first end the supplementary charging and then start the external charging. On the other hand, if the time from when the above operation is performed until external charging starts becomes long when a condition for starting external charging is satisfied by the user operating a charger outside the vehicle, the user may feel uncomfortable. Therefore, when a condition for starting external charging is satisfied during the execution of supplementary charging, it is desired to end the supplementary charging, then start the external charging, and prevent the time until external charging starts from becoming long.

[0007] The present invention has been made in view of the above circumstances, and an object thereof is to provide a battery charging control device for a vehicle that enables supplementary charging and external charging and can prevent the time until external charging starts from becoming long.

Means for Solving the Problem

[0008] In view of the above problems, the inventors of the present application focused on the control for resetting the control device. Specifically, it is desirable that the information (signals) held by the control device be reset as appropriate. That is, it is desired to appropriately perform reset control on the control device to erase the information (signals) it holds, and then recalculate (regenerate) or reacquire and update the information. And the timing immediately after the completion of the replenishment charge is suitable for performing this reset control. However, when the external charge start condition for starting external charging during the replenishment charge is satisfied, if the replenishment charge is stopped, the above reset control is performed, and then external charging is started, the signals for realizing CAN communication between these, which are output from the control device to the charger along with the erasure process of the information (signals), will be erased. As a result, it has been found that these signals have to be regenerated and resent to the charger, which takes time and delays the start of external charging. Based on the above findings, the inventors of the present application have invented the following as a vehicle battery charge control device.

[0009] That is, the present invention is connected to a power supply device having a motor as a drive source, a high-voltage battery that supplies power to the motor, a low-voltage battery having an output voltage lower than that of the high-voltage battery, and a charger provided outside the vehicle, and the high-voltage battery is charged by the power supply device to realize external charging. In a battery charging control device for a vehicle including a charging connection device, a supplementary charging device that performs supplementary charging for charging the low-voltage battery with the output power of the high-voltage battery, and a control device that controls each device including the supplementary charging device and performs CAN communication with a plurality of CAN communication devices including the charger. The control device includes a determination unit that determines whether or not an external charging start condition, which is a condition for starting the external charging, is satisfied, and when the determination unit determines that the external charging start condition is satisfied, the control device generates a signal for realizing CAN communication with the charger and transmits the signal to the charger, and at the same time, an external charging control unit that issues a command to start the external charging to the charger; when the determination unit determines that the external charging start condition is satisfied during the supplementary charging, a stop control for stopping the supplementary charging device, an information erasure control for erasing a plurality of information including a signal for realizing CAN communication between the control device and the CAN communication device after the end of the stop control, and an update control for updating at least a part of the erased information. The supplementary charging control unit is provided. When the determination unit determines that the external charging start condition is satisfied in a state where the supplementary charging is not being performed, the external charging start control is started after a predetermined first time has elapsed since the external charging start condition was satisfied. When the determination unit determines that the external charging start condition is satisfied during the supplementary charging, the external charging start control is started after a second time longer than the first time has elapsed since the external charging start condition was satisfied. (Claim 1).

[0010] According to this device, external charging for charging the high-voltage battery by a power supply device outside the vehicle and supplementary charging for charging the low-voltage battery with the output power of the high-voltage battery are realized. Therefore, the charge amounts of both the high-voltage battery and the low-voltage battery can be ensured.

[0011] Also, when the external charging start condition is satisfied during the supplementary charging, the supplementary charging device is stopped, and then information erasure control and update control are performed. Therefore, the control device can be reset by utilizing the end timing of the supplementary charging.

[0012] Moreover, when the external charging start condition is satisfied during the supplementary charging, the external charging start control is started after a relatively long second time has elapsed since the external charging start condition was satisfied. Therefore, it becomes possible to start external charging after the supplementary charging device has stopped due to the satisfaction of the external charging start condition during the supplementary charging, so that interference between the control sequence for performing supplementary charging and the control sequence for starting external charging can be suppressed. Also, the process of generating a signal for realizing CAN communication between the control device and the charger can be started only after the information erasure control is completed. Therefore, it is not necessary to perform the process of generating and transmitting the signal for realizing CAN communication between the control device and the charger twice before and after the information erasure control. Thus, the time spent on the above process can be shortened, and it is possible to prevent the time from when the external charging start condition is satisfied until external charging starts from being delayed.

[0013] In the above configuration, preferably, a temporary storage device capable of storing information regarding the supplementary charging device only during the operation of the supplementary charging device, a storage device capable of storing information regarding the supplementary charging device both during and after the stop of the supplementary charging device, and a writing processing device for performing a writing process of writing and storing the information stored in the temporary storage device in the storage device are provided, and when the supplementary charging control unit stops the supplementary charging device, it causes the writing processing device to perform the writing process and then stops the supplementary charging device (Claim 2).

[0014] According to this configuration, since the information regarding the supplementary charging device is written into the storage device capable of storing the information even after the stop of the supplementary charging device and then the supplementary charging device is stopped, the above information can be continuously held even after the stop of the supplementary charging device.

[0015] However, if the above writing process is performed before the charging device stops, when the charging device is stopped due to the external charging start condition being satisfied during charging, the time from when the external charging start condition is satisfied until external charging starts becomes longer by the time of this writing process. In contrast, in the present invention, the time taken for generating and transmitting the signals for realizing the CAN communication between the control device and the charger is shortened as described above. Therefore, it is possible to prevent the start time of external charging from becoming excessively delayed while performing the above writing process.

[0016] In the above configuration, preferably, a disconnecting and connecting device capable of disconnecting and connecting the electrical connection between the high-voltage circuit including the low-voltage battery and the high-voltage battery, and a forced opening command output device capable of outputting a forced opening command which is a command for forcibly opening the disconnecting and connecting device are provided. When stopping the charging device, the charging control unit determines whether or not the forced opening command is output from the forced opening command output device (Claim 3).

[0017] According to this configuration, it is possible to determine whether or not it is possible to output a forced opening command, that is, to forcibly open the disconnecting and connecting device to forcibly cut off the electrical connection between the high-voltage circuit and the high-voltage battery, by using the stop timing of the charging device. And in the present invention, when the charging device is stopped due to the external charging start condition being satisfied during charging, the time taken for generating and transmitting the signals for realizing the CAN communication between the control device and the charger is shortened as described above, and the time from when the external charging start condition is satisfied until external charging starts is shortened. Therefore, in the above case, it is possible to prevent the start time of external charging from becoming excessively delayed while performing the above determination.

[0018] In the above configuration, preferably, a connection / disconnection device capable of disconnecting and connecting the electrical connection between the high-voltage circuit including the low-voltage battery and the high-voltage battery is provided. When the external charging start control is performed, the external charging control unit closes the connection / disconnection device and activates the charging device to start the charging. When the charging control unit stops the charging device, it opens the connection / disconnection device and then stops the charging device (Claim 4).

[0019] In this configuration, when the external charging start condition is satisfied, the connection / disconnection device is closed and the charging device is activated to start the charging. That is, the charging is also performed during the external charging. Therefore, the charge amounts of both the high-voltage battery and the low-voltage battery can be more ensured.

[0020] Also, according to this configuration, when the external charging start condition is satisfied during the charging, after the connection / disconnection device is opened and the charging device is stopped, the connection / disconnection device can be closed and the charging device can be activated. Therefore, it is possible to prevent the control of opening the connection / disconnection device and stopping the charging device when stopping the charging device from interfering with the control of closing the connection / disconnection device and activating the charging device when starting the external charging.

Effects of the Invention

[0021] As described above, according to the battery charging control device for a vehicle of the present invention, while enabling the charging and external charging, it is possible to suppress an increase in the time until the external charging is started.

Brief Description of the Drawings

[0022]

Figure 1

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Figure 11

Mode for Carrying Out the Invention

[0023] (Overall Configuration of Vehicle) The battery charging control device of the vehicle according to the embodiment of the present invention will be described. FIG. 1 is a diagram schematically showing the configuration of a vehicle 1 equipped with a battery charging control device 100 according to the present embodiment. The vehicle 1 is, for example, a four-wheel automobile.

[0024] The vehicle 1 (battery charging control device 100) includes a high-voltage battery 2, a low-voltage battery 3 having an output voltage lower than that of the high-voltage battery 2, a high-voltage circuit 30 having a plurality of electrical devices and electrically connected to the high-voltage battery 2, and a charging connection device 50. Further, the vehicle 1 has a plurality of controllers including a microprocessor or the like and controlling each part of the vehicle 1.

[0025] (Battery) In this embodiment, a Li battery (lithium battery) is mounted on the vehicle 1 as the high-voltage battery 2. For example, the high-voltage battery 2 includes a plurality of battery modules each composed of 12 battery cells connected in 2 parallel rows × 6 series rows, and these battery modules are connected in series. Also, in this embodiment, a lead battery is mounted on the vehicle 1 as the low-voltage battery 3. For example, the nominal voltage of the high-voltage battery 2 is 24V, and the nominal voltage of the low-voltage battery 3 is 12V.

[0026] Detection devices such as a battery current sensor SN1 for detecting the current of the high-voltage battery 2 and a battery temperature sensor SN2 for detecting the temperature of the high-voltage battery 2 are provided in the high-voltage battery 2. Also, although not shown in the figure, a battery heater for raising the temperature of the battery module is provided in the high-voltage battery 2.

[0027] (High-voltage circuit) The high-voltage circuit 30 includes, as electrical devices, a motor 4, a generator 5, an inverter 6, a converter 7, a DC / DC converter 8, a PTC heater 9, an electric compressor 10, etc. Also, the high-voltage circuit 30 includes a high-voltage line 31 for connecting these electrical devices.

[0028] The inverter 6, the converter 7, the DC / DC converter 8, the PTC heater 9, and the electric compressor 10 are each connected to the high-voltage line 31. The motor 4 is connected to the high-voltage line 31 via the inverter 6. The generator 5 is connected to the high-voltage line 31 via the converter 7.

[0029] The motor 4 rotates by receiving power supply from the high-voltage battery 2. The motor 4 is mounted on the vehicle 1 as a drive source of the vehicle 1, and the output of the motor 4 is transmitted to wheels (not shown) via a driving force transmission device 12.

[0030] The generator 5 is a power generation device for charging the high-voltage battery 2. The vehicle 1 of this embodiment is a series hybrid vehicle. That is, the vehicle 1 is equipped with an engine 22 that drives the generator 5, and the generator 5 is rotationally driven by the engine 22 to generate electricity, and the electricity generated by the generator 5 is supplied to the high-voltage battery 2. The engine 22 is, for example, a rotary engine. Note that the generator 5 is also connected to the wheels via a driving force transmission device 12, and the vehicle 1 can regenerate the energy during its deceleration.

[0031] The inverter 6 is a device that converts a direct current into an alternating current, and converts the direct current from the high-voltage battery 2 into an alternating current and supplies it to the motor 4. The converter 7 is a device that converts an alternating current into a direct current, and converts the alternating current generated by the generator 5 into a direct current and supplies it to the high-voltage battery 2.

[0032] The DC / DC converter 8 is a device that steps down the input power and outputs it. In the vehicle 1, it is possible to perform supplementary charging to charge the low-voltage battery 3 with the output voltage of the high-voltage battery 2, and the DC / DC converter 8 is incorporated into the high-voltage circuit 30 so that it can step down the output voltage of the high-voltage battery 2 and supply it to the low-voltage battery 3.

[0033] The PTC heater 9 and the electric compressor 10 constitute the air conditioning device 11 of the vehicle 1. Specifically, the PTC heater 9 is a device for heating the interior of the vehicle 1, and the electric compressor 10 is a device for cooling the interior of the vehicle 1. Note that in this embodiment, a cooling plate (not shown) for cooling the high-voltage battery 2 is provided, and the electric compressor 10 also cools this cooling plate.

[0034] (Main contactor) A pair of main contacts 71, 71 are provided between the high-voltage battery 2 and the high-voltage circuit 30. The main contacts 71, 71 are contactors, that is, electromagnetic switches including electromagnets, and are devices that disconnect and connect the electrical connection between two contacts according to the supplied power. When the contactor is closed, the two contacts are electrically connected and energized, and when the contactor is opened, the two contacts are electrically disconnected and de-energized. The main contacts 71, 71 disconnect and connect the electrical connection between the high-voltage battery 2 and the high-voltage circuit 30. Specifically, one main contact 71 disconnects and connects the electrical connection between the positive electrode side line of the high-voltage battery 2 and the positive electrode side line of the high-voltage circuit 30, and the other main contact 71 disconnects and connects the electrical connection between the negative electrode side line of the high-voltage battery 2 and the negative electrode side line of the high-voltage circuit 30. The main contacts 71, 71 correspond to the "disconnecting and connecting device" in the claims.

[0035] (Charging connection device) The charging connection device 50 is a device that electrically connects the power supply device 310 and the high-voltage battery 2 by being connected to the power supply device 310 having a charger 312 provided outside the vehicle. By electrically connecting the power supply device 310 and the high-voltage battery 2 via the charging connection device 50, external charging for charging the high-voltage battery 2 by the power supply device 310 is realized. The start / stop of external charging, that is, the switching of the output / stop of the power from the power supply device 310 to the high-voltage battery 2 and the adjustment of the current output from the power supply device 310 to the high-voltage battery 2, etc., are implemented by the charger 312 of the power supply device 310. In this embodiment, the power supply device 310 is a DC power supply. Hereinafter, the charging connection device 50 is referred to as a DC charging connection device 50, the power supply device 310 to which this is connected is referred to as a DC power supply device 310, and the charger of the DC power supply device 310 is referred to as a DC charger 312.

[0036] The DC charging connection device 50 is configured to fit with a connector (hereinafter referred to as a DC connector) provided at the end of a cable connected to the DC charger 312 (DC power supply device 310), and by this fitting, the DC charger 312 (DC power supply device 310) and the high-voltage battery 2 are electrically connected.

[0037] The DC charging connection device 50 is connected to the DC charger 312 (DC power supply device 310) by a power line and is also connected by a CAN - BUS. The DC charging connection device 50 is connected to the C - BCM200 described later by a CAN - BUS. The DC charging connection device 50 and the DC charger 312 (DC power supply device 310) are connected in a CAN - communicable manner by fitting with the DC connector.

[0038] Between the DC charging connection device 50 and the high - voltage circuit 30, QBC contacts 73, 73 which are contacts for disconnecting and connecting these electrical connections are provided. The DC charging connection device 50 is electrically connected to the high - voltage battery 2 via the QBC contacts 73, 73, the high - voltage circuit 30, and the main contacts 71, 71. One of the QBC contacts 73 disconnects and connects the electrical connection between the positive - side line of the high - voltage circuit 30 and the positive - side line of the DC charging connection device 50, and the other QBC contact 73 disconnects and connects the electrical connection between the negative - side line of the high - voltage circuit 30 and the negative - side line of the DC charging connection device 50.

[0039] (Controller) FIG. 2 is a block diagram showing the relationship between the controllers mounted on the vehicle 1. In the vehicle 1, as controllers, there are mounted a C-BCM (Center-Body Control Module) 200, a PCM (Power Control Module) 201, an ECM (Engine Control Module) 202, a DMCM (Driver Moor Control Module) 203, an SGCM (Starter Generator Control Module) 204, a BECM (Battery Energy Control Module) 205, an ESU (Electric Supply Unit) 206, and a DC / DC control unit 207. Further, in the vehicle 1, there is mounted an HMI device (HMI: Human Machine Interface) 210 which is a device including a display and performing display of various information and the like. The above PCM 201 corresponds to the "control device" in the claims.

[0040] The C-BCM 200 mainly controls doors and windows. The PCM 201 mainly controls the devices of the drive system of the vehicle 1. The ECM 202 mainly controls the engine 22. The DMCM 203 controls the inverter 6. The SGCM 204 controls the converter 7. The ESU 206 controls the air conditioning device 11.

[0041] The DC / DC control unit 207 controls the DC / DC converter 8. The DC / DC converter 8 and the DC / DC control unit 207 that controls it constitute a charging device 20 that realizes a supplementary charge for charging the low-voltage battery 3 with the output voltage of the high-voltage battery 2.

[0042] The BECM205 performs various calculations regarding the high-voltage battery 2. Specifically, the BECM205 calculates the SOC of the high-voltage battery 2. In detail, the BECM205 calculates the initial value of the SOC of the high-voltage battery 2 based on the detected values of the battery current sensor SN1 and the battery temperature sensor SN2 in a state where the main contacts 71 and 71 are open. Then, the BECM205 updates the battery SOC by integrating the increase or decrease amount of the battery SOC per unit time calculated based on the above detected values with respect to this initial value. Also, the BECM205 performs failure determination of the high-voltage battery 2, the battery current sensor SN1, and the battery temperature sensor SN2.

[0043] Each of the controllers 200 to 207 operates by receiving power from the low-voltage battery 3. Also, the controllers 200 to 207 are connected by a CAN-BUS so that they can communicate with each other via CAN (Controller Area Network).

[0044] As shown in FIG. 3 described later, at least the DC / DC control unit 207 among the controllers has a CPU (Central Processing Unit) 207A, a volatile memory 207B that can store information only while power is being supplied, that is, only during the operation of the charging device 20 including the DC / DC control unit 207, and a non-volatile memory 207C that can continuously store information both during and after the power supply is stopped, that is, during and after the operation of the charging device 20 including the DC / DC control unit 207. In the present embodiment, the CPU 207A of the DC / DC control unit 207 corresponds to the "writing processing device" in the claims, the volatile memory 207B corresponds to the "temporary storage device" in the claims, and the non-volatile memory 207C corresponds to the "storage device" in the claims.

[0045] (Charge Control) The control related to external charging and supplementary charging is mainly carried out by the PCM201. FIG. 3 is a control block diagram related to these controls. The PCM201 functionally includes a determination unit 301, an external charging control unit 302, and a supplementary charging control unit 303. The determination unit 301 determines the success or failure of the external charging start condition, which is the condition for starting external charging, and the supplementary charging end condition, which is the condition for ending supplementary charging. The external charging control unit 302 performs external charging start control for starting external charging. The supplementary charging control unit 303 performs supplementary charging end control for ending supplementary charging.

[0046] As shown in FIG. 3, the PCM201 is electrically connected to the DC charging connection device 50, and a signal is input to the PCM201 from the DC charging connection device 50. Also, through CAN communication, values detected by the battery SOC calculated by the BECM205 in the BECM205, the battery current sensor SN1 input to the BECM205, the battery temperature sensor SN2, etc. are input to the PCM201.

[0047] The PCM201 is electrically connected to the main contacts 71, 71 and the QBC contacts 73, 73 respectively, and opens and closes them. Specifically, the PCM201 opens and closes these contacts 71, 73 by switching the supply and stop of power from the low-voltage battery 3 to each contact 71, 73.

[0048] The PCM201 is electrically connected to the supplementary charging device 20, and switches the start (operation) / stop of the supplementary charging device 20 (DC / DC control unit 207 and DC / DC converter 8). Specifically, the supplementary charging device 20 is configured to start (operate) when power is supplied from the low-voltage battery 3, and the PCM201 switches the supply and stop of power from the low-voltage battery 3 to the supplementary charging device 20.

[0049] The PCM201 communicates with the DC charger 312 via the C-BCM200 and the DC charging connection device 50 through CAN communication. Also, as shown in FIG. 2, the PCM201 also communicates with the ECM202, DMCM203, SGCM204, BECM205, and the DC / DC control unit 207 (auxiliary charging device 20) through CAN communication. That is, these C-BCM200, DC charger 312, and PCM201, and the ECM202, DMCM203, SGCM204, BECM205, and DC / DC control unit 207 (auxiliary charging device 20) are CAN communication devices that communicate with the PCM201 through CAN communication.

[0050] (External charging start control and auxiliary charging end control) After the start of auxiliary charging, when a request to drive the PTC heater 9 is issued because the low-voltage battery 3 is fully charged, or when a request to drive the battery heater is issued, the PCM201 determines that the auxiliary charging end condition, which is the condition for ending auxiliary charging, is satisfied. Also, when the external charging start condition is satisfied during the execution of auxiliary charging, the PCM201 determines that the auxiliary charging end condition is satisfied. Then, the PCM201 performs different controls depending on whether the external charging start condition is satisfied during the execution of auxiliary charging, whether the external charging start condition is satisfied when auxiliary charging is not being performed, and whether the auxiliary charging end condition is satisfied when the external charging start condition is not satisfied. FIG. 4 is a flowchart showing the switching procedure of these control patterns.

[0051] (External charging start control: when auxiliary charging is not being performed) Control to be executed when the external charging start condition is satisfied while supplementary charging is not being performed, that is, external charging start control in a state where supplementary charging is not being performed. In other words, in the flowchart of FIG. 4, when the PCM 201 determines that it is not in the middle of supplementary charging (the determination in step S101 is NO) and determines that the external charging start condition is satisfied (the determination in step S102 is YES), the external charging start control will be described. FIG. 5 is a flowchart showing the control content of the PCM 201 (following 1 in FIG. 4) when the external charging start condition is satisfied while supplementary charging is not being performed. FIG. 6 is a diagram showing the control content of each controller when the external charging start condition is satisfied while supplementary charging is not being performed. Here, as shown in FIG. 6, the PCM 201 determines that the external charging start condition is satisfied when it receives a charging start signal from the DC charging connection device 50. The charging start signal is transmitted from the DC charging connection device 50 to the PCM 201 when the DC charging connection device 50 and the DC connector are engaged.

[0052] When the external charging start condition is satisfied in a state where supplementary charging is not being performed, the PCM 201 determines whether or not a predetermined first time has elapsed since the external charging start condition was satisfied (step S2). Then, waiting for this determination to become YES, that is, waiting for the first time to elapse since the external charging start condition was satisfied, the external charging start control is started. First, in order to start CAN communication with the DC charger 312, the PCM 201 generates a CAN request signal, which is a signal for realizing CAN communication with the DC charger 312, and transmits this to the DC charger 312 (step S3). As shown in FIG. 6, when the CAN request signal is transmitted from the PCM 201 to the DC charger 312, the DC charger 312 receives it. Thereby, CAN communication via the C-BCM 200 and the DC charging connection device 50 is started between the PCM 201 and the DC charger 312. The above-mentioned first time is preset and stored in the PCM 201.

[0053] When CAN communication between the PCM 201 and the DC charger 312 is started, the PCM 201 transmits, by CAN communication, pre - external - charging information, which is information for more appropriately performing external charging, to the DC charger 312 (step S4).

[0054] Specifically, the PCM 201 calculates the maximum charging time, which is the maximum value of the time required to fully charge the high - voltage battery 2, based on the battery SOC received from the BECM 205 and the detection values of the battery current sensor SN1 and the battery temperature sensor SN2. Then, information such as this maximum charging time and the temperature of the high - voltage battery 2 is transmitted to the DC charger 312. When receiving the pre - external - charging information, the DC charger 312 adjusts the power output to the high - voltage battery 2 based on this information. For example, when the maximum charging time has elapsed since the start of power output, the power output is stopped, and when the temperature of the high - voltage battery 2 detected by the battery temperature sensor SN2 is high, the output current is decreased.

[0055] After step S4, the PCM 201 closes each contactor (step S5). Specifically, the PCM 201 closes the main contactors 71, 71 and the QBC contactors 73, 73. Thereby, the high - voltage battery 2 and the high - voltage circuit 30 are electrically connected, and the high - voltage battery 2 and the DC charger 312 are electrically connected via the high - voltage circuit 30.

[0056] In the vehicle 1 of this embodiment, supplementary charging is performed during external charging. Thus, after step S5, the PCM 201 activates the supplementary charging device 20 and starts its operation (step S6). Specifically, the PCM 201 starts supplying power from the low - voltage battery 3 to the DC / DC converter 8 to activate the DC / DC converter 8 so that power is input thereto. Also, the PCM 201 starts supplying power from the low - voltage battery 3 to the DC / DC control unit 207 to activate it.

[0057] As shown in FIG. 6, when the activation of the supplementary charging device 20 is completed, an activation completion signal is transmitted from the supplementary charging device 20 to the PCM 201. The PCM 201 waits for this activation completion signal to be input (waits for the determination in step S7 to become YES), and then executes the next step S8.

[0058] In step S8, the PCM 201 issues a command to the DC charger 312 to start external charging and starts external charging (permits power output from the DC power supply device 310 to the vehicle 1 side), and ends the external charging start control. Specifically, as shown in FIG. 6, the PCM 201 transmits a charging start signal to the DC charger 312. When the DC charger 312 receives the charging start signal from the PCM 201, it starts power supply from the DC power supply device 310 to the high-voltage battery 2.

[0059] (Supplementary charging end control: when the external charging start condition is not satisfied) Next, the control that is executed when the supplementary charging end condition is satisfied in a state where the external charging start condition is not satisfied, that is, the supplementary charging end control when the supplementary charging end condition is satisfied without the establishment of the external charging start condition. That is, in the flowchart of FIG. 4, when the PCM 201 determines that it is in the process of supplementary charging (the determination in step S101 is YES), determines that the external charging start condition is not satisfied (the determination in step S103 is NO), and determines that the supplementary charging end condition is satisfied due to factors other than the start of external charging (the determination in step S105 is YES), the control in this case will be described. FIG. 7 is a flowchart showing the control content of the PCM 201 (following 2 in FIG. 4) when the supplementary charging end condition is satisfied in a state where the external charging start condition is not satisfied. FIG. 8 is a diagram showing the control content of each controller when the supplementary charging end condition is satisfied in a state where the external charging start condition is not satisfied.

[0060] When the supplementary charging end condition is satisfied while the external charging start condition is not satisfied, the PCM 201 first opens the main contacts 71, 71 (step S22). That is, during the supplementary charging, the main contacts 71, 71 are closed, and in step S22, the main contacts 71, 71 are switched from the closed state to the open state.

[0061] Next, the PCM 201 transmits a cut-off request signal to the supplementary charging device 20 to stop the supplementary charging device 20 (step S23).

[0062] As shown in FIG. 8, when receiving the cut-off request signal (step Q21), the supplementary charging device 20 performs a writing process of writing and storing various information stored in the volatile memory 207B into the non-volatile memory 207C (step Q22).

[0063] For example, when the CPU 207A of the supplementary charging device 20 determines whether each part of the supplementary charging device 20 such as the DC / DC converter 8 is faulty during the running of the vehicle 1 or during the supplementary charging when the supplementary charging device 20 is operating (when receiving power supply), and stores the determination result in the volatile memory 207B. When the CPU 207A of the supplementary charging device 20 receives the cut-off request signal from the PCM 201, it writes the information about the supplementary charging device 20 including the above determination result stored in the volatile memory 207B into the non-volatile memory 207C.

[0064] When the above writing process is completed, the supplementary charging device 20 (CPU 207A) transmits a cut-off permission signal for permitting the stop of the supplementary charging device 20 to the PCM 201 (step Q23).

[0065] Returning to FIG. 7, the PCM 201 waits for the cut-off permission signal to be input from the supplementary charging device 20 (waits for the determination in step S24 to become YES), and then proceeds to the next step S25.

[0066] In step S25, the PCM 201 stops the charging device 20 (performs stop control to stop the charging device 20). Specifically, the PCM 201 stops the power supply from the low-voltage battery 3 to the charging device 20 (the DC / DC control unit 207 and the DC / DC converter 8).

[0067] After step S25, the PCM 201 starts post-charging-stop processing (step S26).

[0068] The post-charging-stop processing includes processing to reset a part of the PCM 201. That is, as shown in FIG. 8, the post-charging-stop processing includes information erasure processing (step S26A) in which the PCM 201 erases some of the information (signals) generated by its own calculation or the information (signals) acquired from other controllers and the like, and re-calculation / re-acquisition processing (step S26B) in which at least a part of the erased information is calculated (re-generated) or re-acquired and updated.

[0069] In the above information erasure processing, the PCM 201 erases at least the following two pieces of information. (1) The PCM 201 erases the information (signal) that has been transmitted to the CAN communication device to realize CAN communication. (2) The PCM 201 erases the determination result of the abnormality determination of the main contactor forced opening system performed last time and stored so far. Then, in the above re-calculation / re-acquisition processing, the PCM 201 re-calculates / re-acquires this information. That is, (1) The PCM 201 re-calculates (re-generates) the erased information for realizing CAN communication and re-transmits it to the CAN communication device to resume CAN communication with the CAN communication device. (2) The PCM 201 performs an abnormality determination of the main contactor forced opening system and updates the abnormality determination result. Details of the abnormality determination of the main contactor forced opening system will be described later.

[0070] Further, the post - charging - stop process includes a battery information update process (step S26C) in which the PCM201 updates the information of the high - voltage battery 2 stored therein. Specifically, the PCM201 requests the BECM205 to transmit the latest battery SOC and the latest detected values of the battery current sensor SN1 and the battery temperature sensor SN2, receives these pieces of information from the BECM205, and updates the information stored so far. Specifically, when the main contactors 71, 71 are switched from the closed state to the open state in step S22, the BECM205 calculates the initial value of the battery SOC and transmits this initial value of the battery SOC to the PCM201.

[0071] The abnormal determination of the main contactor forced - opening system will be described with reference to FIG. 9.

[0072] As shown in FIG. 9, the PCM201 has a microcomputer (including a CPU, memory, etc.) 201A and a system LSI201C for monitoring the microcomputer 201A. A signal SS5 indicating whether the microcomputer 201A is normal or not is output from the system LSI201C. The PCM201 has an output driver 201B that generates an output signal SS1 to the main contactors 71, 71. The main contactors 71, 71 are opened and closed according to the output signal SS1 from the output driver 201B. The output signal SS1 of the output driver 201B is input to the microcomputer 201A as a monitor signal SS2, and the microcomputer 201A can monitor the output signal SS1 of the output driver 201B. Further, in addition to the normal drive signal SS3 for opening and closing the main contactors 71, 71, a cutoff signal SS4 for opening the main contactors 71, 71 is output from the microcomputer 201A. The above - mentioned output driver 201B corresponds to the "forced - opening command output device" in the claims.

[0073] If a signal indicating that the microcontroller 201A is normal is output from the system LSI 201C and the cutoff signal SS4 is not output from the microcontroller 201A, the output driver 201B outputs the drive signal SS3. Thus, in this case, the main contacts 71, 71 are opened and closed according to the drive signal SS3. On the other hand, if a signal indicating that the microcontroller is abnormal is output from the system LSI 201C (or if a signal indicating normality is not output), or if the cutoff signal SS4 is output from the microcontroller 201A, regardless of the drive signal SS3, the output driver 201B outputs a signal to forcibly open the main contacts 71, 71. Thus, in this case, the main contacts 71, 71 are forcibly opened regardless of the drive signal SS3.

[0074] The abnormality determination of the main contact forcible opening system is a process of determining whether the main contacts 71, 71 can be forcibly opened by the signal output from the system LSI 201C and the output of the cutoff signal SS4, that is, whether a command for forcibly opening the main contacts 71, 71 can be correctly output from the output driver 201B. This determination is performed for each of the system LSI 201C and the cutoff signal SS4. Hereinafter, the signal for opening the main contacts 71, 71 is referred to as an open signal, and the signal for closing the main contacts 71, 71 is referred to as a close signal.

[0075] As a specific procedure for the abnormality determination regarding the system LSI 201C, the PCM 201 first sets the drive signal SS3 to an open signal and sets the output signal SS5 of the system LSI 201C to the signal when the microcontroller 201A is abnormal. Note that in step S22, the main contacts 71, 71 are opened. That is, the drive signal SS3 has already become an open signal and this is maintained. Also, the PCM 201 stops the output of the cutoff signal SS4.

[0076] Next, the PCM 201 sets the drive signal SS3 to a close signal while maintaining the output signal of the system LSI 201C as the signal when the microcontroller 201A is abnormal.

[0077] At this time, if the signal indicating that the microcomputer 201A is abnormal is properly output from the system LSI 201C, even if the drive signal SS3 is switched from the open signal to the closed signal, the signal output from the output driver 201B remains the open signal. On the other hand, if the signal indicating that the microcomputer 201A is abnormal is not properly output from the system LSI 201C, the output signal SS1 of the output driver 201B is switched to the closed signal when the drive signal SS3 is switched from the open signal to the closed signal. From this, the PCM 201 determines whether or not the monitor signal SS2 has been switched from the open signal to the closed signal as the drive signal SS3 is switched to the closed signal. When the monitor signal SS2 has been switched, it is determined that the signal indicating that the microcomputer 201A is abnormal is not properly output from the system LSI 201C, and that the command for forcibly opening the main contacts 71, 71 from the system LSI 201C is not correctly output. On the other hand, the PCM 201 determines that the above command is correctly output when the monitor signal SS2 is switched as the drive signal SS3 is switched to the closed signal.

[0078] As a specific determination procedure for the cutoff signal SS4, the PCM 201 first sets the drive signal SS3 to the open signal (and maintains it at the open signal) and outputs the cutoff signal SS4. At this time, the system LSI is made to output a signal when the microcomputer 201A is normal. Next, the PCM 201 sets the drive signal SS3 to the closed signal while maintaining the output of the cutoff signal SS4.

[0079] At this time, if the cutoff signal SS4 is properly output, even if the drive signal SS3 switches from the open signal to the closed signal, the signal output from the output driver 201B remains the open signal. On the other hand, when the cutoff signal SS4 is not properly output, when the drive signal SS3 switches from the open signal to the closed signal, the signal output from the output driver 201B switches to the closed signal. From this, the PCM201 determines whether or not the monitor signal SS2 has switched from the open signal to the closed signal as the drive signal SS3 switches to the closed signal. When the monitor signal SS2 has switched, it is determined that the cutoff signal SS4 is not properly output, that is, a command for forcibly opening this is not correctly output to the main contacts 71, 71. On the other hand, when the monitor signal SS2 has switched, it is determined that the above command is correctly output.

[0080] Returning to the flowchart of FIG. 7, after starting the above-described post-charging stop process, the PCM201 determines whether or not a predetermined reference time has elapsed since the start of the post-charging stop process (step S27). This reference time is set to a time longer than the time taken for the post-charging stop process. At the timing when the determination in step S27 becomes YES, all of the post-charging stop processes are completed. From this, when the determination in step S27 becomes YES, the PCM204 determines that the post-charging stop process has ended (step S28), and ends the post-charging end control. The reference time is set in advance by experiments or the like and stored in the PCM201.

[0081] (Control when the external charging start condition and the charging end condition are satisfied) Next, the control when the external charging start condition is satisfied during the execution of the supplementary charging, and the control when the supplementary charging end condition is satisfied as the external charging start condition is satisfied, that is, in the flowchart of FIG. 4, when the PCM 201 determines that it is in the supplementary charging (the determination in step S101 is YES) and determines that the external charging start condition is satisfied (the determination in step S103 is YES), and further determines that the supplementary charging end condition is satisfied (step S104), the control in this case will be described. FIG. 10 is a flowchart showing the control content of the PCM 201 (following 3 in FIG. 4) when the external charging start condition is satisfied during the execution of the supplementary charging. FIG. 11 is a diagram showing the control content of each controller when the external charging start condition is satisfied during the execution of the supplementary charging.

[0082] When the external charging start condition is satisfied during the execution of the supplementary charging, unlike the case where the external charging start condition is satisfied in a state where the supplementary charging is not being performed, the PCM 201 does not immediately generate and transmit a CAN request signal to the DC charger 312, but instead starts the supplementary charging end control earlier.

[0083] Similar to the case where the supplementary charging end condition is satisfied in a state where the external charging start condition is not satisfied, the PCM 201 first opens the main contacts 71, 71 (step S32). Next, the PCM 201 transmits a cutoff request signal to the supplementary charging device 20 to stop the supplementary charging device 20 (step S33). As described above, when the supplementary charging device 20 receives the cutoff request signal (step Q21), it performs a writing process (step Q22), and when the writing process is completed, it transmits a cutoff permission signal to the PCM 201 (step Q23). Then, when the cutoff permission signal is input from the supplementary charging device 20 (when the determination in step S34 becomes YES), the PCM 201 stops the supplementary charging device 20 (step S35).

[0084] After stopping the auxiliary charging device 20, the PCM 201 starts post-auxiliary charge stop processing (step S36). However, if the auxiliary charge end condition is satisfied due to the external charge start condition being satisfied during the auxiliary charge, the PCM 201 does not perform the battery SOC update process, but only performs the information erasure process and the recalculation / retrieval process (step S36B). That is, after stopping the auxiliary charging device 20, the PCM 201 performs the information erasure process (step S36A), and then performs the recalculation / retrieval process (step S36B).

[0085] Thus, when the external charge start condition is satisfied during the auxiliary charge, the PCM 201 immediately starts auxiliary charge end control (control including steps S32 to S36). On the other hand, the PCM 201 waits for a predetermined second time to elapse after the external charge start condition is satisfied (waits for the determination in step S40 to become YES), and then starts external charge start control.

[0086] Here, the second time is set to be longer than the first time. Further, the second time is set to be longer than the time from when the external charge start condition is satisfied until the information erasure process ends, and shorter than the time from when the external charge start condition is satisfied until the recalculation / retrieval process ends, when the external charge start condition is satisfied during the auxiliary charge. Thus, the external charge start control is started between the end of the information erasure process and the end of the recalculation / retrieval process. Note that the second time is preset to be longer than the first time as described above and stored in the PCM 201.

[0087] Thus, when the information erasure process ends, the PCM 201 starts the external charge start control without waiting for the recalculation / retrieval process to end, that is, without waiting for the recalculation / retrieval of information (signals) such as the abnormal determination result of the main contactor forced opening system erased by the information erasure process and the recalculation / retrieval of other information to be completed.

[0088] Specifically, when the information erasure process is completed, the PCM 201 performs a recalculation and reacquisition process, and generates a CAN request signal, which is a signal for realizing CAN communication with the DC charger 312, which is the first step of the external charging start control, and transmits this signal to the DC charger 312 (step S41), thereby starting the CAN communication with the DC charger 312. Then, the PCM 201 performs the steps after the CAN request signal generation and transmission step of the external charging start control. That is, the PCM 201 transmits the pre-external charging information to the DC charger 312 via CAN communication (step S42), closes each contactor 71, 73 (step S43), activates the recharge device 20 (step S44), and waits for the activation completion signal to be input from the recharge device 20 (waits for the determination in step S45 to be YES), and then transmits a charge start signal to the DC charger 312 (step S46), causing the DC charger 312 to start external charging.

[0089] Here, when the external charging start condition is satisfied during the recharge, the battery SOC update process is omitted as described above. Therefore, the PCM 201 transmits the information already stored as the pre-external charging information to the DC charger 312.

[0090] Here, the step of stopping the recharge device 20 in steps S25 and S35 above corresponds to the "stop control" in the claims, the information erasure process in steps S26A and S36A above corresponds to the "information erasure control" in the claims, and the recalculation and reacquisition process in steps S26B and S36B above corresponds to the "update control" in the claims. Also, the steps of steps S2 to S7 and S41 to S46 above correspond to the "external charging start control" in the claims.

[0091] (Function, etc.) As described above, in the above embodiment, recharge for charging the low-voltage battery 3 with the high-voltage battery 2 and external charging for charging the high-voltage battery 2 with the external power supply device 310 outside the vehicle are realized. Therefore, the charge amounts of both the high-voltage battery 2 and the low-voltage battery 3 can be ensured.

[0092] When the external charging start condition is satisfied, the DC charger 312 and the PCM 201 communicate via CAN, and the external charging pre - information, which is the information necessary for external charging, is transmitted from the PCM 201 to the DC charger 312. Therefore, the high - voltage battery 2 can be charged more appropriately.

[0093] Also, when the replenishment charge end condition is satisfied, regardless of whether this is associated with the establishment of the external charging start condition, after the replenishment charging device 20 stops, an information erasure process and a re - calculation / re - acquisition process are performed, and a part of the PCM 201 is reset. Therefore, an opportunity to reset the PCM 201 can be ensured and the information of the PCM 201 can be updated appropriately.

[0094] Moreover, when the external charging start condition is satisfied during the replenishment charge, replenishment charge end control is performed and the replenishment charging device 20 is stopped. And when the external charging start condition is satisfied during the replenishment charge, the time from when the external charging start condition is satisfied until the external charging start control is started is set to be a second time longer than a first time when the external charging start condition is satisfied in a state where the replenishment charge is not being performed. Therefore, when the external charging start condition is satisfied during the replenishment charge, it becomes possible to start the external charging start control after the replenishment charging device 20 stops, avoiding interference between the control for performing the replenishment charge and the control for starting the external charging, and enabling the external charging to be started appropriately.

[0095] Furthermore, since the time from when the external charging start condition is satisfied until the external charging start control is started is set as described above, when the external charging start condition is satisfied during the replenishment charge, the timing at which the generation and transmission process of the CAN request signal for communicating with the DC charger 312 is first performed after the external charging start condition is satisfied can be set to the timing after the end of the information erasure process. Therefore, the time spent on the generation and transmission of this CAN request signal can be shortened.

[0096] Specifically, if the generation and transmission of the CAN request signal are performed before the execution of the information erasure process, the CAN request signal is erased by the execution of the information erasure process, so it has to be generated again and transmitted to the DC charger 312. That is, in this case, the generation and transmission of the CAN request signal are performed twice, before and after the information process, so the time spent on the generation and transmission of the CAN request signal becomes longer. In contrast, in the above embodiment, it becomes possible to generate the CAN request signal for the first time after the end of the information erasure process and transmit the CAN request signal from the PCM 201 to the DC charger 312. Therefore, the number of times of generation and transmission of the CAN request signal can be limited to one, and the time spent on this can be shortened. Also, in the above embodiment, since the second time is set to be shorter than the time from the start of the external charging start control to the end of the recalculation / reacquisition process, the external charging start control is started before the end of the recalculation / reacquisition process. Therefore, compared with the case of waiting for the end of the recalculation / reacquisition process, the start time of the external charging start control and thus the start time of the external charging can be advanced. Therefore, when the external charging start condition is satisfied during the supplementary charging, it is possible to prevent the time from when the external charging start condition is satisfied until the external charging starts from becoming long.

[0097] Also, in the above embodiment, before stopping the charging device 20 when the supplementary charging end condition is satisfied, a writing process is performed, and information regarding the charging device 20, such as the determination result of the failure determination of the charging device 20, is written from the volatile memory 207B to the non-volatile memory 207C. Therefore, even after the charging device 20 is stopped and the supplementary charging is completed, the information regarding the charging device 20 can be continuously held by the charging device 20.

[0098] Here, the above writing process is also executed when the supplementary charge end condition is satisfied as the external charge start condition is satisfied during the execution of the supplementary charge. Therefore, when the external charge start condition is satisfied during the execution of the supplementary charge, the start time of the external charge is delayed by the time required for the writing process. However, in the above embodiment, as described above, when the external charge start condition is satisfied during the execution of the supplementary charge, it is prevented that the start time of the external charge is delayed due to shortening of the time spent for generation and transmission of the CAN request signal. Therefore, in the above case, it is possible to prevent the start time of the external charge from being excessively delayed while executing the writing process.

[0099] Also, in the above embodiment, as post-supplementary charge stop processing, the PCM 201 erases the abnormality determination result of the main contactor forced opening system that has been stored so far, and then re-executes the abnormality determination. That is, the abnormality determination of the main contactor forced opening system is performed when the post-supplementary charge stop processing is executed. Therefore, it is possible to secure an opportunity to determine the abnormality of the main contactor forced opening system.

[0100] Also, in the above embodiment, when the external charge start condition is satisfied, the main contacts 71, 71 are closed and the supplementary charging device 20 is activated to start the supplementary charge. That is, the supplementary charge is also executed during the external charge. Therefore, it is possible to secure the charge amounts of both the high-voltage battery 2 and the low-voltage battery 3 more.

[0101] Also, in the above embodiment, when the external charge start condition is satisfied during the execution of the supplementary charge and the supplementary charge end condition is satisfied accordingly, after the main contacts 71, 71 are opened and the supplementary charging device 20 is stopped, the main contacts 71, 71 are closed and the supplementary charging device 20 is activated. Therefore, it is possible to prevent interference between the control of opening the main contacts 71, 71 and stopping the supplementary charging device 20 that is executed with the end of the supplementary charge, and the control of closing the main contacts 71, 71 and activating the supplementary charging device 20 that is executed with the start of the external charge.

[0102] (Modification example) In the above first and second embodiments, the case where the off-vehicle power supply device that supplies power to the high-voltage battery 2 outputs a direct current has been described. However, the off-vehicle power supply device may output an alternating current.

[0103] Also, in the above embodiment, the case where both the volatile memory 207B and the non-volatile memory 207C are provided in the charging device 20 has been described. However, the volatile memory 207B and the non-volatile memory 207C may be provided in another controller (for example, the PCM 201). Further, the device that performs the writing process is not limited to the CPU 207A of the charging device 20.

Explanation of Reference Numerals

[0104] 2 High-voltage battery 3 Low-voltage battery 4 Motor 8 DC / DC converter 20 Charging device 30 High-voltage circuit 50 DC charging connection device 71 Main contactor (disconnecting and connecting device) 201 PCM (control device) 201B Output driver (forced opening command output device) 207A Volatile memory (temporary storage device) 207B Non-volatile memory (storage device) 207C CPU (writing processing device) 310 DC power supply device (power supply device) 312 DC charger (charger)

Claims

1. In a battery charging control device for a vehicle, comprising a motor as a drive source, a high-voltage battery that supplies power to the motor, a low-voltage battery having an output voltage lower than that of the high-voltage battery, and a charging connection device that is connected to a power supply device having a charger provided outside the vehicle to realize external charging for charging the high-voltage battery by the power supply device, a supplementary charging device that performs supplementary charging for charging the low-voltage battery with the output power of the high-voltage battery, a control device that controls each device including the supplementary charging device and performs CAN communication with a plurality of CAN communication devices including the charger, the control device includes a determination unit that determines whether or not an external charging start condition, which is a condition for starting the external charging, is satisfied, an external charging control unit that, when it is determined by the determination unit that the external charging start condition is satisfied, generates a signal for realizing CAN communication between the control device and the charger, transmits the signal to the charger, and issues a command to start the external charging to the charger, a supplementary charging control unit that, when it is determined by the determination unit that the external charging start condition is satisfied during the supplementary charging, performs stop control to stop the supplementary charging device, information erasure control to erase a plurality of information including a signal for realizing CAN communication between the control device and the CAN communication device after the end of the stop control, and update control to update at least a part of the erased information, the external charging control unit includes when it is determined by the determination unit that the external charging start condition is satisfied in a state where the supplementary charging is not being performed, starts the external charging start control after a predetermined first time has elapsed since the external charging start condition was satisfied, when it is determined by the determination unit that the external charging start condition is satisfied during the supplementary charging, starts the external charging start control after a second time longer than the first time has elapsed since the external charging start condition was satisfied. A battery charging control device for a vehicle, characterized in that.

2. In the battery charging control device for a vehicle according to Claim 1, a temporary storage device capable of storing information regarding the supplementary charging device only during the operation of the supplementary charging device, a storage device capable of storing information regarding the supplementary charging device both during and after the operation of the supplementary charging device, A writing processing device that performs a writing process of writing and storing the information stored in the temporary storage device in the storage device. The recharge control unit, when stopping the recharge device, causes the writing processing device to perform the writing process and then stops the recharge device. A battery charge control device for a vehicle, characterized by this.

3. In the battery charge control device for a vehicle according to claim 1 or 2, A disconnecting and connecting device capable of disconnecting and connecting the electrical connection between the high-voltage circuit including the low-voltage battery and the high-voltage battery, A forced opening command output device capable of outputting a forced opening command that is a command for forcibly opening the disconnecting and connecting device, The recharge control unit, when stopping the recharge device, determines whether the forced opening command is output from the forced opening command output device. A battery charge control device for a vehicle, characterized by this.

4. In the battery charge control device for a vehicle according to claim 1 or 2, A disconnecting and connecting device capable of disconnecting and connecting the electrical connection between the high-voltage circuit including the low-voltage battery and the high-voltage battery, When the external charge control unit performs the external charge start control, the disconnecting and connecting device is closed and the recharge device is started to start the recharge. The recharge control unit, when stopping the recharge device, opens the disconnecting and connecting device and then stops the recharge device. A battery charge control device for a vehicle, characterized by this.

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