Control device and vehicle

Abstract

The invention relates to a control device and a vehicle. A control device ECU is provided with a processor and a communication unit that communicates with each of a plurality of battery packs (batteries). Each of the plurality of battery packs may perform a leakage detection process and is replaceable. The processor selects one of the plurality of battery packs that performs the leakage detection process based on the information of the communication start timing with each of the battery packs acquired by the communication unit.

Description

Technical Field

[0001] The present disclosure relates to a control device and a vehicle. Background Art

[0002] Japanese Patent Application Laid-Open No. 2023-101504 discloses a vehicle equipped with a replaceable battery pack. Summary of the invention

[0003] Although not explicitly described in the above-mentioned Japanese Patent Application Laid-Open No. 2023-101504, a plurality of replaceable battery packs that can perform leakage detection processing are sometimes loaded in a vehicle. In such a case, it is considered that the leakage detection functions of each of the plurality of battery packs are operated at the same time, and the leakage detection functions interfere with each other. In such a case, it is difficult to detect leakage normally.

[0004] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide a control device and a vehicle that can suppress abnormal execution of leakage detection processing caused by a plurality of replaceable batteries.

[0005] A control device according to a first aspect of the present disclosure is a control device for a vehicle equipped with a plurality of batteries, comprising:

[0006] Processor; and

[0007] The communication unit communicates with each of the plurality of batteries.

[0008] Each of the plurality of batteries can perform leakage detection processing and can be replaced.

[0009] The processor selects a portion of the batteries for which leakage detection processing is to be performed from among the plurality of batteries based on the information on the plurality of batteries acquired through the communication unit.

[0010] In the control device of the first aspect of the present disclosure, as described above, a portion of the batteries among the plurality of batteries are selected to perform leakage detection processing. Thus, the degree of interference between the batteries can be reduced compared to a case where the leakage detection functions of all the plurality of batteries interfere with each other. Therefore, in a vehicle having a plurality of batteries that can perform leakage detection processing and can be replaced, abnormal execution of leakage detection processing can be suppressed.

[0011] In the control device of the first aspect above, preferably,

[0012] The processor selects one battery among the plurality of batteries for executing leakage detection processing.

[0013] According to this structure, since the leakage detection process can be executed by a single battery, it is possible to further suppress the leakage detection functions of a plurality of batteries from interfering with each other.

[0014] In such a case, preferably,

[0015] The processor selects a battery that first starts communication with the communication unit among the plurality of batteries as a battery for executing leakage detection processing.

[0016] According to this configuration, the battery for executing the leakage detection process can be easily selected based on the communication start timing.

[0017] In the control device of the first aspect above, preferably,

[0018] The processor selects a battery disposed at a predetermined position of the vehicle among the plurality of batteries as a battery for executing leakage detection processing.

[0019] According to this structure, the battery for executing the leakage detection process can be easily selected based on the loading position of the battery.

[0020] A vehicle according to a second aspect of the present disclosure comprises:

[0021] Multiple batteries; and

[0022] The control device of the first aspect above.

[0023] This makes it possible to provide a vehicle capable of suppressing abnormal execution of the leakage detection process.

[0024] According to the present disclosure, it is possible to suppress abnormal execution of leakage detection processing caused by a plurality of replaceable batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like reference numerals represent like elements, and in which:

[0026] Figure 1 is a diagram showing the structure of a battery replacement system according to a first embodiment;

[0027] Figure 2 is a diagram showing the structure of an electric vehicle according to a first embodiment;

[0028] Figure 3 is a timing chart showing control between the respective ECUs in the electric vehicle according to the first embodiment;

[0029] Figure 4 is a diagram showing the structure of an electric vehicle according to a second embodiment;

[0030] Figure 5 is a timing chart showing control between the respective ECUs in the electric vehicle according to the second embodiment;

[0031] Figure 6is a diagram showing a structure of an electric vehicle according to a first modification of the first embodiment; and

[0032] Figure 7 It is a diagram showing a configuration of an electric vehicle according to a second modification of the first embodiment. DETAILED DESCRIPTION

[0033] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding parts are given the same reference numerals, and their description will not be repeated. First embodiment

[0034] Structure of the battery replacement system

[0035] Figure 1 1 is a diagram showing a battery replacement system 900 including an electric vehicle 100 and a battery replacement device 200 according to the first embodiment. The electric vehicle 100 is an example of a “vehicle” in the present disclosure.

[0036] The electric vehicle 100 includes a plurality of (two in the first embodiment) battery packs 20. The battery pack 20 stores electric power for driving the electric vehicle 100. The two battery packs 20 are arranged side by side in the front-rear direction of the electric vehicle 100, for example. The battery pack 20 is an example of a "battery" in the present disclosure.

[0037] The electric vehicle 100 is, for example, a PHEV (Plug-in Hybrid Electric Vehicle), a BEV (Battery Electric Vehicle), or a FCEV (Fuel Cell Electric Vehicle).

[0038] The battery replacement device 200 includes a battery replacement device body 200a for performing battery replacement and a storage 200b for storing batteries 201. The battery replacement device body 200a is a device for performing battery replacement by replacing the battery pack 20 loaded on the electric vehicle 100 with the battery 201. The storage 200b is provided together with the battery replacement device body 200a. In the battery replacement device 200 (battery replacement device body 200a), an entrance 202 for the electric vehicle 100 to enter and exit is provided.

[0039] The batteries 201 stored in the storage 200b are transported to the electric vehicle 100 after being moved to the temporary storage location 140 provided in the underfloor area S. In addition, in the underfloor area S, a battery placement table 131, a lifting unit 132, and a transport unit 133 described later are provided.

[0040] In the battery replacement device 200, a vehicle stop area 203 is provided. The battery replacement device 200 performs battery replacement when the electric vehicle 100 is parked in the vehicle stop area 203. For example, a user performs an operation to indicate the start of the battery replacement operation in the navigation system (not shown) of the electric vehicle 100. In response to this, an instruction signal for starting the battery replacement operation is sent from the electric vehicle 100 to the battery replacement device 200. In response to receiving the above instruction signal, the battery replacement device 200 starts controlling the battery replacement operation.

[0041] The lifting unit 132 lifts and lowers the electric vehicle 100 while holding it from below, thereby lifting and lowering the electric vehicle 100. The lifting unit 132 includes a pair of lifting rods 132a. The electric vehicle 100 is supported from below by the pair of lifting rods 132a. Battery replacement (loading and unloading of batteries) is performed in a state where the electric vehicle 100 is held horizontally by the pair of lifting rods 132a.

[0042] The battery placement stand 131 is configured to be movable in the Z direction. The battery placement stand 131 is raised to a height position at the bottom of the electric vehicle 100, thereby placing the battery pack 20 removed from the electric vehicle 100 on the battery placement stand 131. In addition, the battery placement stand 131 on which the battery 201 is placed is raised to a height position at the bottom of the electric vehicle 100, thereby installing the battery 201 on the electric vehicle 100.

[0043] The battery placement stand 131 raises and lowers the battery packs 20 one by one. The battery placement stand 131 can be moved to a position corresponding to each of the two battery placement positions in the electric vehicle 100 by moving in the X direction. Thus, the two battery packs 20 are replaced (mounted and removed) in sequence.

[0044] The transport unit 133 is configured to transport the battery (201, 20). Specifically, the transport unit 133 transports the battery pack 20 unloaded from the electric vehicle 100 and placed on the battery placement table 131 to the temporary placement location 140. In addition, the transport unit 133 transports the battery 201 transported from the storage 200b to the temporary placement location 140 to the battery placement table 131.

[0045] Figure 2 1 is a diagram showing a configuration of an electric vehicle 100 according to a first embodiment. Figure 2 In addition to the two battery packs 20 , the electric vehicle 100 further includes a vehicle body 10 . The vehicle body 10 is a portion of the electric vehicle 100 other than the battery packs 20 .

[0046] The vehicle body 10 includes a circuit CR11 and a circuit CR12. The battery pack 20 includes a circuit CR21 and a circuit CR22. The circuit CR21 corresponds to a first high-voltage circuit configured to apply the voltage (high voltage) of the battery cell 21 to the circuit CR11. The circuit CR11 corresponds to a second high-voltage circuit that receives the voltage (high voltage) from the battery cell 21. The circuit CR12 corresponds to a first low-voltage circuit configured to apply the voltage (low voltage) of the auxiliary battery 17 to the circuit CR22. The circuit CR22 corresponds to a second low-voltage circuit that receives the voltage (low voltage) from the auxiliary battery 17. A DC / DC converter 16 is provided between the circuit CR11 and the circuit CR12.

[0047] The electric circuit CR11 in the vehicle body 10 includes a MG (Motor Generator) 11 a , an inverter 11 b , an electric leakage detector 12 , a DC charging relay 14 a , a DC inlet 14 b , an AC charger 15 a , and an AC inlet 15 b .

[0048] A BMS (Battery Management System) 22 a and a leakage detector 22 b are provided in the circuit CR21 in the battery pack 20 .

[0049] The vehicle body 10 further includes two terminals T11 to which the battery pack 20 can be detachably mounted, and SMRs 13 disposed between the terminals T11 and the circuit CR11 . The circuit CR11 (high-voltage power supply line) is connected to the terminals T11 via the SMRs 13 .

[0050] The battery pack 20 further includes a terminal T21 that can be attached to and detached from the vehicle body 10 and an SMR 23 disposed between the terminal T21 and the circuit CR21. The circuit CR21 (high-voltage power supply line) is connected to the terminal T21 via the SMR 23. In addition, "SMR" means a system main relay (System Main Relay).

[0051] The battery cell 21 is composed of a secondary battery such as a lithium ion battery, a nickel-hydrogen battery or a sodium ion battery. The secondary battery may be a liquid secondary battery or a solid secondary battery. A plurality of secondary batteries may form a battery pack.

[0052] The vehicle body 10 further includes two terminals T12. The circuit CR12 (low-voltage power line) in the vehicle body 10 is connected to each terminal T12. In addition, the communication line CL1 in the vehicle body 10 is also connected to each terminal T12. The battery pack 20 also includes a terminal T22. The circuit CR22 (low-voltage power line) in the battery pack 20 is connected to the terminal T22. In addition, the communication line CL2 in the battery pack 20 is also connected to the terminal T22.

[0053] The auxiliary battery 17 is an on-board battery that supplies power for driving auxiliary equipment and the like loaded in the vehicle 100. The auxiliary battery 17 outputs DC power to the circuit CR12 (low-voltage power supply line). In addition to the auxiliary battery 17, the circuit CR12 also has ECUs 18a, 18b, 18c, and 18d. The circuit CR22 also has ECUs 28a and 28b. The auxiliary battery 17 supplies power to each of the ECUs 18a-18d and 28a, 28b connected to the low-voltage power supply line, for example. In addition, "ECU" means an electronic control unit (Electronic Control Unit). In addition, ECU 18a is an example of a "control device" of the present disclosure.

[0054] The ECU 18a is equivalent to a control device (EV-ECU) that integrates various controls related to the vehicle 100. The ECU 18a includes a processor 18e and a communication unit 18f. The communication unit 18f communicates via the communication line CL1, thereby receiving information of each of the plurality of battery packs 20. Specifically, the communication unit 18f receives information from each of the ECU 28a and the ECU 28b.

[0055] ECU18b corresponds to a control device (Plg-ECU) that detects the states of the DC inlet 14b and the AC inlet 15b. ECU18c corresponds to a control device (Bat-C-ECU) that controls the DC charging relay 14a and the AC charger 15a. ECU18d corresponds to a control device that monitors the leakage state of the circuit CR11.

[0056] ECU 28a corresponds to a control device (Bat-ECU) that monitors the state of battery cell 21 and controls SMR 23. ECU 28b corresponds to a control device that monitors the leakage state of circuit CR21. Each ECU is connected to each other via an in-vehicle network (eg, CAN (Controller Area Network)) so as to be communicable with each other.

[0057] The leakage detector 12 detects the leakage state related to the circuit CR11 and outputs the detected leakage state to the ECU18d. The BMS22a detects the state (current, voltage, temperature, etc.) of the battery cell 21 and outputs its detection result to the ECU28a. The leakage detector 22b detects the leakage state related to the circuit CR21 and outputs the detected leakage state to the ECU28b. When the circuit CR11 and the circuit CR21 are connected, the leakage detector 12 or 22b detects the leakage state of the circuit formed by the circuit CR11 and the circuit CR21. The ECU18a obtains information showing the battery state and the leakage state from the ECU18d, 28a and 28b. In addition, the leakage detection process is always executed when the electric vehicle 100 is driven (when driving, charging, etc.).

[0058] Each of SMR13 and SMR23 switches the connection / disconnection of the circuit between circuit CR11 and circuit CR21. ECU18a sets both SMR13 and SMR23 to a closed state (connected state) when the voltage of battery cell 21 is applied to circuit CR11. ECU18a sets at least one of SMR13 and SMR23 to a disconnected state (disconnected state) when the voltage of battery cell 21 is not applied to circuit CR11. In addition, when the electric vehicle 100 is driven (when driving, charging, etc.), SMR13 and two SMR23 are set to a closed state.

[0059] The terminals T21 and T22 of the battery pack 20 are respectively configured to be attachable to and detachable from the terminals T11 and T12 of the vehicle body 10. The battery pack 20 is mounted on the vehicle body 10 by connecting the terminals T21 and T22 to the terminals T11 and T12, respectively.

[0060] The MG 11 a functions as a motor for driving the electric vehicle 100 . The inverter 11 b functions as a PCU (Power Control Unit) for the MG 11 a . The inverter 11 b drives the MG 11 a using electric power supplied from the battery unit 21 .

[0061] Each of the DC inlet 14b and the AC inlet 15b has a terminal for detecting connection / non-connection of a charging cable (charging plug), and outputs a signal showing whether the charging cable is connected to the ECU 18b. The ECU 18a obtains information showing the state of the inlet from the ECU 18b, and sends a control instruction to the ECU 18c. In the vehicle 100, charging control is performed by cooperation of the ECUs 18a-18c.

[0062] Here, in conventional vehicles, since the leakage detection functions of each battery pack in a plurality of battery packs operate at the same time, the leakage detection functions sometimes interfere with each other. Leakage detection means detecting the insulation resistance value when leakage is intentionally generated, and determining whether the insulation resistance value is normal. Therefore, mutual interference of leakage detection functions refers to a situation in which the insulation resistance value is abnormally detected due to intentional leakage in a plurality of battery packs. In such a case, it is difficult to detect leakage normally.

[0063] Therefore, in the first embodiment, the ECU 18a (processor 18e) selects a battery pack 20 that performs leakage detection processing among the plurality of battery packs 20. Specifically, the ECU 18a determines one battery pack 20 that performs leakage detection processing and one battery pack 20 that does not perform leakage detection processing. Thus, leakage detection processing is performed in only one battery pack 20 among the plurality of battery packs 20, so that interference between leakage detection functions can be suppressed.

[0064] Furthermore, even if leakage occurs in a battery pack 20 that does not perform leakage detection processing, the leakage detector 12 ( 18 d ) on the vehicle side can detect the presence of leakage. Based on this information and the leakage detection result of the battery pack 20 that performs leakage detection processing, the battery pack 20 that is leaking can be identified.

[0065] ECU Timing

[0066] Next, refer to Figure 3 The method of selecting the battery pack 20 for executing the leakage detection process by the ECU 18a (electric vehicle 100) will be described. Figure 3 Before the start of the sequence, the two battery packs 20 are removed from the electric vehicle 100. In addition, for the convenience of description, the two battery packs 20 are referred to as battery pack A and battery pack B, respectively.

[0067] In S1 , the ECU 18 a (EV-ECU) is activated. At this time, the ECU 18 a is supplied with electric power from the auxiliary battery 17 .

[0068] In S2 , the ECU 18 a (communication unit 18 f ) starts communication. Specifically, the ECU 18 a (communication unit 18 f ) starts communication with other ECUs ( 18 b , 18 c , 18 d , etc.) in the electric vehicle 100 .

[0069] In S3, the ECU 18a (processor 18e) determines whether communication is established with either battery pack A or B. If communication is established with either battery pack A or B ("Yes" in S3), the process proceeds to S4. If communication is not established with either battery pack A or B ("No" in S3), the process of S3 is repeated.

[0070] Since the battery pack A is installed in the electric vehicle 100 earlier than the battery pack B, the ECU ( 28 a and 28 b ) of the battery pack A is set to be activated earlier than the ECU of the battery pack B in S21 .

[0071] In S22, the ECU (28a and 28b) of the battery pack A starts communicating. As a result, the ECU (28a and 28b) of the battery pack A can communicate with the ECU 18a of the electric vehicle 100. That is, the ECU 18a communicates with the ECU (28a and 28b) of the battery pack A before the ECU (28a and 28b) of the battery pack B. In addition, the information that the battery pack A communicates with the ECU 18a before the battery pack B is an example of "information related to multiple batteries" in the present disclosure.

[0072] Since the battery pack B is installed in the electric vehicle 100 later than the battery pack A, the ECU ( 28 a and 28 b ) of the battery pack B is activated later than the ECU of the battery pack A in S41 .

[0073] In S42 , the ECU ( 28 a and 28 b ) of the battery pack B starts communication. This enables the ECU ( 28 a and 28 b ) of the battery pack B to communicate with the ECU 18 a of the electric vehicle 100 .

[0074] When the communication of the ECU of the battery pack A starts, the processing of the ECU 18a of the electric vehicle 100 shifts from S3 to S4. In S4, the ECU 18a selects the battery pack A as the main battery pack 20. In addition, the ECU 18a selects the battery pack B as the sub-battery pack 20. In conjunction with this, the ECU 18a determines to make the battery pack A execute the leakage detection process.

[0075] In S5, ECU 18a transmits a command signal for turning on the leakage detection function to ECU (28a and / or 28b) of battery pack A via communication unit 18f. As a result, ECU 28b receives the command signal for turning on the leakage detection function. Next, the process proceeds to S6.

[0076] In S23 , the battery pack A (ECU 28 b ) turns on the leakage detection function (executes the leakage detection process). Then, the process of the battery pack A ends.

[0077] In S6, the ECU 18a determines whether the communication is connected with the battery pack B (28a, 28b). If the communication is connected with the battery pack B ("Yes" in S6), the process proceeds to S7. If the communication is not connected with the battery pack B ("No" in S6), the process of S6 is repeated.

[0078] In S7, ECU 18a transmits a command signal for turning off the leakage detection function to ECU (28a and / or 28b) of battery pack B via communication unit 18f. As a result, ECU 28b receives the command signal for turning off the leakage detection function. Then, the processing of ECU 18a ends.

[0079] In S43 , the battery pack B (ECU 28 b ) turns off the leakage detection function. If the leakage detection function of the battery pack B is turned off when the communication of the battery pack B starts, the processes of S7 and S43 may not be performed. Then, the process of the battery pack B ends.

[0080] As described above, in the first embodiment, the processor 18e selects one battery pack 20 to execute the leakage detection process among the plurality of battery packs 20. Thus, it is possible to suppress the leakage detection process of each of the plurality of battery packs 20 from being executed simultaneously. As a result, it is possible to suppress the plurality of leakage detection processes from interfering with each other. As a result, it is possible to suppress the leakage detection process from being abnormally executed.

[0081] In the first embodiment, the processor 18e selects the battery pack 20 that first starts communication with the communication unit 18f among the plurality of battery packs 20 as the battery pack 20 that performs the leakage detection process. This allows the leakage detection process to be started earlier than when the battery pack 20 that last starts communication performs the leakage detection process. Second embodiment

[0082] Next, refer to Figure 4 and Figure 5 , a second embodiment of the present disclosure is described. In the second embodiment, a battery pack 20 for executing leakage detection processing is selected based on the position where each battery pack 20 is loaded. This is different from the above-mentioned first embodiment in which the battery pack 20 for executing leakage detection processing is selected based on the timing of the start of communication of the battery pack 20. In addition, the same reference numerals are given to the same structures as those in the above-mentioned first embodiment, and the description is not repeated.

[0083] Figure 4 1 is a diagram showing a vehicle body 10A and a plurality of battery packs 20 of an electric vehicle 100A. The vehicle body 10A is provided with an ECU 118a, which replaces the ECU 18a of the first embodiment described above. The ECU 118a has a processor 118e and a communication unit 118f. In addition, the ECU 118a is an example of a "control device" of the present disclosure. In addition, the processor 118e and the communication unit 118f are examples of a "processor" and a "communication unit" of the present disclosure, respectively.

[0084] The vehicle body 10A includes one terminal T12 and one terminal T12A. That is, the vehicle body 10A includes the terminal T12A instead of one of the two terminals T12 provided in the vehicle body 10 of the first embodiment.

[0085] Terminal T12 and terminal T12A have different resistance values. Specifically, terminal T12 has multiple (e.g., 10) identical pins (not shown). Terminal T12A has multiple (e.g., 9) identical pins as terminal T12 and (e.g., 1) a pin having a different resistance value from the above pins.

[0086] As a result, the resistance value between the battery pack 20 connected to the terminal T12 and the ECU 118a is different from the resistance value between the battery pack 20 connected to the terminal T12A and the ECU 118a. The above resistance value is calculated by the ECU 28a based on the detection value of the voltage sensor (not shown) provided in each battery pack 20. Each battery pack 20 (ECU 28a) sends the information of the calculated resistance value to the ECU 118a. In addition, the above resistance value information is an example of "information related to multiple batteries" in the present disclosure.

[0087] The ECU 118a detects the terminal (T12 or T12A) to which each battery pack 20 is connected based on the resistance value information transmitted from each battery pack 20. The ECU 118a is configured to transmit a command signal to execute leakage detection processing to the battery pack 20 mounted at the position corresponding to the terminal T12A.

[0088] ECU Timing

[0089] Next, refer to Figure 5 , the method of selecting the battery pack 20 to perform the leakage detection process by the ECU 118a is described. Figure 5 Before the start of the sequence of the first embodiment, the plurality of battery packs 20 are removed from the electric vehicle 100A. Figure 3 ) The same processing steps as those in the first embodiment are given the same reference numerals and will not be described repeatedly. In the second embodiment, the battery pack A is connected to the terminal T12A, and the battery pack B is connected to the terminal T12.

[0090] In S32 after S21 , the battery pack A (ECU 28 a ) calculates the resistance value between the battery pack A and the ECU 118 a (eg, the resistance value of the connection portion between the terminal T12A and the terminal T22 ).

[0091] In S33 , the battery pack A (ECU 28 a ) transmits information on the resistance value calculated in S32 to the electric vehicle 100A (ECU 118 a ).

[0092] In S52 subsequent to S41 , the battery pack B (ECU 28 a ) calculates the resistance value between the battery pack B and the ECU 118 a (eg, the resistance value of the connection portion between the terminal T12 and the terminal T22 ).

[0093] In S53 , the battery pack B (ECU 28 a ) transmits information on the resistance value calculated in S52 to the electric vehicle 100A (ECU 118 a ).

[0094] In S13, the ECU118a of the electric vehicle 100A compares the resistance value of S32 and the resistance value of S53. Thus, the ECU118a detects the respective loading positions of the battery pack A and the battery pack B. For example, the ECU118a may have in advance the correct data of the resistance value corresponding to the terminal T12A and the correct data corresponding to the terminal T12, and compare the resistance values ​​of S32 and S53 with the above correct data. In addition, the ECU118a can detect the above loading position based on the magnitude relationship between the resistance value of S32 and the resistance value of S53. Next, the processing proceeds to S4. In addition, in the second embodiment, after S5, the processing does not proceed to S6 of the above-mentioned first embodiment, but proceeds to S7.

[0095] In addition, other structures and processes are the same as those of the above-mentioned first embodiment, and therefore, the description thereof will not be repeated.

[0096] In the first and second embodiments, an example is shown in which one of the two battery packs 20 is selected as the battery pack 20 for performing the leakage detection process, but the present disclosure is not limited thereto. One of three or more battery packs 20 may be selected. In addition, a plurality of battery packs 20 (less than the total number of battery packs 20) may be selected from among the three or more battery packs 20.

[0097] In the first embodiment, the battery pack 20 that first starts communicating with the ECU 18a is selected as the battery pack 20 that performs the leakage detection process, but the present disclosure is not limited thereto. For example, the battery pack 20 that last starts communicating with the ECU 18a may be selected.

[0098] In the second embodiment described above, an example of detecting the battery pack 20 loaded at a predetermined position (the position corresponding to the terminal T12A) based on the resistance value between the terminals (12 / 12A) is shown, but the present disclosure is not limited thereto. For example, the position of each battery pack 20 may be detected based on a GPS (Global Positioning System) module loaded in each of the plurality of battery packs.

[0099] In the first and second embodiments, the vehicle body 10 ( 10A) is provided with the leakage detection function ( 12 , 18 d ), but the present disclosure is not limited thereto. The vehicle body may not be provided with the leakage detection function.

[0100] In the first and second embodiments, the battery pack 20 for executing the leakage detection process is selected based on the predetermined information about the battery pack 20 (communication start timing, loading position), but the present disclosure is not limited thereto. The battery pack 20 for executing the leakage detection process may be randomly selected.

[0101] In the second embodiment described above, it is not described in a manner that there is a particular difference between the battery loading position corresponding to the terminal T12A and the battery loading position corresponding to the terminal T12, but the present disclosure is not limited thereto. For example, the battery loading position corresponding to the terminal T12A may be a position where the temperature of the battery pack is more likely to rise (or less likely to rise) than the battery loading position corresponding to the terminal T12. In such a case, the battery pack whose temperature is more likely to rise (or less likely to rise) can be caused to perform leakage detection processing.

[0102] In the first embodiment described above, an example is shown in which the communication between the ECU of the loaded battery pack 20 and the ECU of the vehicle body 10 is started in response to the battery pack 20 being loaded into the vehicle body 10, but the present disclosure is not limited thereto. For example, the communication may be started in response to turning on the ignition power after the plurality of battery packs 20 are loaded into the vehicle body 10.

[0103] In the first and second embodiments described above, an example is shown in which the ECU 18 a (118 a) communicates directly with each of the plurality of battery packs 20 (ECUs 28 a and 28 b), but the present disclosure is not limited thereto. The ECU 18 a (118 a) may also communicate indirectly with the plurality of battery packs 20 (ECUs 28 a and 28 b), for example, through an integrated ECU that integrates the plurality of battery packs 20.

[0104] In the first and second embodiments described above, an example of sending a command signal for executing leakage detection processing to the battery pack 20 is shown, but the present disclosure is not limited thereto. For example, in the case where leakage detection processing is automatically started in response to communication starting in the battery pack, a command signal for executing leakage detection processing may not be sent to the battery pack. In addition, in such a case, a command signal for not executing leakage detection processing needs to be sent to any number of battery packs.

[0105] In the first (second) embodiment described above, an example is shown in which the battery pack 20 that starts communication first (the battery pack 20 arranged at a predetermined position) performs leakage detection processing, but the present disclosure is not limited to this. The selection criteria of the battery pack 20 that performs leakage detection processing may also not be limited to the above example. For example, the battery pack 20 with a low SOH (State Of Health) may also perform leakage detection processing.

[0106] In the above-mentioned first and second embodiments, an example in which the SMR (13, 23) is provided in each of the vehicle body 10 (10A) and the battery pack 20 is shown, but the present disclosure is not limited thereto. Figure 6 As shown in FIG. 1 , the vehicle body 10B without the SMR 13 can be used for an electric vehicle. Figure 7 As shown, two battery packs 20A without SMR 23 can be loaded into an electric vehicle. Figure 6 and Figure 7 Although a modification example based on the structure of the above-mentioned first embodiment is shown, the above-mentioned modification example can also be applied to the structure of the second embodiment. In addition, the battery pack 20A is an example of the "battery" in the present disclosure.

[0107] The embodiments disclosed this time should be considered in all respects as illustrative rather than restrictive. The scope of the present disclosure is indicated by the claims rather than the description of the embodiments above, and is intended to include all modifications within the meaning and scope equivalent to the claims.

Claims

1. A control device for a vehicle equipped with a plurality of batteries, comprising: Processor; and a communication unit that communicates with each of the plurality of batteries, Each of the plurality of batteries is capable of performing leakage detection processing and is replaceable, The processor selects a portion of the batteries for executing the leakage detection process among the plurality of batteries based on the information about the plurality of batteries acquired by the communication unit.

2. The control device according to claim 1, wherein: The processor selects one battery among the plurality of batteries for executing the leakage detection process.

3. The control device according to claim 2, wherein: The processor selects a battery that first starts communicating with the communication unit among the plurality of batteries as a battery for executing the leakage detection process.

4. The control device according to claim 1 or 2, wherein: The processor selects a battery disposed at a predetermined position of the vehicle among the plurality of batteries as a battery for executing the leakage detection process.

5. A vehicle comprising: Multiple batteries; and A control device as claimed in any one of claims 1 to 3.

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