Battery management system

Abstract

A BMS (1) for managing a battery pack comprises: a BMU (201) that manages the battery pack; a plurality of CMUs (101, etc.) that monitor the battery pack; and a setting circuit (501). The BMU (201) wirelessly transmits, to the plurality of CMUs (101, etc.), a first signal including identification information pertaining to one CMU from among the plurality of CMUs (101, etc.). Each of the plurality of CMUs (101, etc.) has identification information pertaining to said CMU, receives the first signal transmitted by the BMU (201), and outputs a second signal when the received first signal matches the identification information pertaining to the CMU. The setting circuit (501) generates and outputs association information in which position information pertaining to one CMU, among the plurality of CMUs (101, etc.), that has output the second signal and the identification information included in the first signal transmitted by the BMU (201) have been associated.

Description

Battery Management System

[0001] The present disclosure relates to a battery management system for managing a battery pack.

[0002] In a battery management system that manages a battery pack having multiple battery cells, a management circuit is assumed to manage the battery pack by wirelessly communicating with a monitoring circuit, and the management of the battery pack uses correspondence between identification information of the battery cells and the positions at which the battery cells are arranged (see, for example, Patent Document 1).

[0003] U.S. Pat. No. 1,101,1917

[0004] When the management circuit manages the battery pack by wirelessly communicating with the monitoring circuit, there is a problem in that the unique ID of the monitoring circuit and the location of the monitoring circuit in the battery management system cannot be properly managed.

[0005] The present disclosure provides a battery management system and the like that can appropriately determine the location of a monitoring circuit.

[0006] The battery management system according to the present disclosure is a battery management system for managing an assembled battery, and includes a management circuit for managing the assembled battery, a plurality of monitoring circuits for monitoring the assembled battery, and a setting circuit, wherein the management circuit wirelessly transmits a first signal including identification information of one of the plurality of monitoring circuits to the plurality of monitoring circuits, each of which has the identification information of the monitoring circuit, receives the first signal transmitted by the management circuit, and outputs a second signal if the received first signal matches the identification information of the monitoring circuit, and the setting circuit generates and outputs correspondence information that associates position information of the one of the plurality of monitoring circuits that output the second signal with the identification information included in the first signal transmitted by the management circuit.

[0007] These comprehensive or specific aspects may be realized as a system, a method, an integrated circuit, a computer program, or a computer-readable recording medium such as a CD-ROM, or may be realized as any combination of a system, a method, an integrated circuit, a computer program, and a recording medium.

[0008] According to the present disclosure, the battery management system can appropriately determine the location where the monitoring circuit is located.

[0009] 1 is an external view showing an example of a battery management system according to an embodiment. FIG. 2 is a configuration diagram of an example of a battery management system according to an embodiment. FIG. 3 is an explanatory diagram showing the configuration of an example of a wireless communication circuit included in a cell monitoring circuit according to an embodiment. FIG. 4 is an explanatory diagram showing the configuration of an example of a voltage monitoring circuit included in a cell monitoring circuit according to an embodiment. FIG. 5 is an explanatory diagram showing the configuration of an example of a wireless communication circuit included in a management circuit according to an embodiment. FIG. 6 is an explanatory diagram showing the configuration of an example of an MCU included in a management circuit according to an embodiment. FIG. 7 is a configuration diagram of an example of a current monitoring circuit according to an embodiment. FIG. 8 is an explanatory diagram showing the configuration of an example of a current measurement circuit included in a current monitoring circuit according to an embodiment. FIG. 9 is an explanatory diagram showing the configuration of an example of a wireless communication circuit included in a current monitoring circuit according to an embodiment. FIG. 10 is a flow diagram showing the operation of a battery management system according to an embodiment. FIG. 11 is an explanatory diagram showing an example of correspondence information according to an embodiment. FIG. 12 is an explanatory diagram showing the configuration of a battery management system according to a first modification of an embodiment. FIG. 13 is an explanatory diagram showing the configuration of a battery management system according to a second modification of an embodiment. FIG. 14 is an explanatory diagram showing the configuration of a battery management system according to a third modification of an embodiment. FIG. 15 is an explanatory diagram showing the configuration of a battery management system according to a fourth modification of an embodiment. FIG. 16 is an explanatory diagram showing the configuration of a battery management system according to a fifth modification of an embodiment.

[0010] (Foundation of the Present Disclosure) There is a battery management system that manages a battery pack including a plurality of battery cells. The battery pack is used, for example, as a battery for an electric vehicle.

[0011] The battery management system includes multiple monitoring circuits that monitor the current or voltage of the battery cells, and a management circuit that manages the assembled battery using the multiple monitoring circuits. The monitoring circuits include a current monitoring circuit that monitors the current flowing through the battery cells, and a cell monitoring circuit that monitors the voltage of the battery cells.

[0012] The cell monitoring circuit knows the location of the battery cell it monitors. The management circuit knows the unique ID of the cell monitoring circuit and the location of the cell monitoring circuit, and thereby associates the battery cell with the position of the battery cell in the entire battery pack (in other words, the order of connection). By associating the battery cell with the position of the battery cell, the management circuit can manage individual battery cells and adjust cell balance or determine abnormalities in individual battery cells.

[0013] The current monitoring circuit monitors the current flowing through the battery pack and can determine whether there is an abnormality in the battery pack.

[0014] Conventionally, in a battery management system, communication between a management circuit and multiple monitoring circuits is performed via wired communication. The management circuit is connected to the multiple monitoring circuits using digital communication (in other words, daisy-chain communication). In digital communication, the multiple monitoring circuits communicate in sequence, like a bucket brigade. The management circuit can automatically assign a unique ID to each of the multiple monitoring circuits using the order of connection (also called the connection sequence). The unique ID can be assigned, for example, when communication begins.

[0015] On the other hand, in a battery management system, it is assumed that communication between a management circuit and multiple monitoring circuits is performed via wireless communication. In this case, the management circuit and the multiple monitoring circuits are not connected via wired communication, so it is not possible to assign a unique ID to each of the multiple monitoring circuits using the connection order as in wired communication. In this way, when the management circuit and the multiple monitoring circuits communicate wirelessly, there is a problem in that the management circuit cannot properly grasp the unique ID of each monitoring circuit and the location where the monitoring circuit is located.

[0016] The present disclosure aims to solve such problems and to provide a battery management system in which a management circuit appropriately determines the position of a monitoring circuit.

[0017] Hereinafter, the embodiments will be specifically described with reference to the drawings.

[0018] The embodiments described below are all comprehensive or specific examples, and the numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples and are not intended to limit the present disclosure.

[0019] (Embodiment) In this embodiment, a battery management system that can appropriately grasp the location of a monitoring circuit will be described.

[0020] Fig. 1 is an external view showing an example of a battery management system 1 (hereinafter also referred to as a BMS (Battery Management System) 1) according to an embodiment. Fig. 1 shows the external appearance of the BMS 1 when in use.

[0021] The BMS 1 is a system for managing an assembled battery. For example, the BMS 1 manages the SOC (State of Charge), SOH (State of Health), and SOP (State of Power) of the assembled battery. The BMS 1 also monitors abnormalities in the assembled battery. The BMS 1 includes a management circuit 200 that manages the assembled battery and multiple monitoring circuits 100 that monitor the assembled battery. For example, the assembled battery is configured by connecting multiple battery packs 10 in series or parallel. The battery pack 10 is also configured by one or more battery cells. When the battery pack 10 is configured by multiple battery cells, the multiple battery cells are connected in series.

[0022] The monitoring circuit 100 is disposed on each of the plurality of battery packs 10, for example. The management circuit 200 is connected to the battery pack via a connection box 20, for example.

[0023] FIG. 2 is a configuration diagram of an example of a battery management system (BMS1) according to this embodiment. FIG. 3 is an explanatory diagram showing the configuration of an example of a wireless communication circuit 111 included in a cell monitoring circuit (e.g., CMU 101) according to this embodiment. FIG. 4 is an explanatory diagram showing the configuration of an example of a voltage monitoring circuit 112 included in a cell monitoring circuit (e.g., CMU 101) according to this embodiment. FIG. 5 is an explanatory diagram showing the configuration of an example of a wireless communication circuit 211 included in a management circuit 200 according to this embodiment. FIG. 6 is an explanatory diagram showing the configuration of an example of an MCU 212 included in a management circuit 200 according to this embodiment. The configuration of an example of a battery management system (BMS1) will be described with reference to FIGS. 2 to 6.

[0024] 2 shows a plurality of battery cells 11 that constitute one of a plurality of battery packs 10. Also shown are CMUs (Cell Monitoring Units) 101, 102, and a CMU 103 as the monitoring circuit 100, and a BMU (Battery Management Unit) 201 as the management circuit 200.

[0025] Also shown is a motor 400 as a load to which power is supplied from the battery pack, and a power line 405 (bus bar) connecting the battery pack and the motor 400 is also shown.

[0026] The BMS 1 also includes a setting circuit 501. The setting circuit 501 generates and outputs correspondence information that associates location information of a monitoring circuit (specifically, the CMU 101, etc.) with identification information of the monitoring circuit. The destination of the correspondence information is, for example, the BMU 201, and this case will be described as an example, but the present invention is not limited to this. Associating location information of a monitoring circuit with identification information of the monitoring circuit is also referred to as pairing. Note that the setting circuit 501 is expected to be included in the BMS 1 when generating the correspondence information, but may not be included when the BMS 1 is in use.

[0027] Note that a shunt resistor may be connected to the power line 405 to measure the current flowing through the power line 405. In this case, the BMS 1 further includes a current monitoring circuit (for example, a CMU 301 described later) that uses the shunt resistor to measure the current flowing through the power line 405. The current monitoring circuit is an example of a monitoring circuit.

[0028] The CMU 101 is an example of a cell monitoring circuit that monitors one or more battery cells that make up the battery pack. For example, the CMU 101 monitors the voltage of each of the plurality of battery cells 11.

[0029] Like the CMU 101, the CMUs 102 and 103 are each an example of a cell monitoring circuit that monitors one or more battery cells that make up the battery pack.

[0030] The CMU 101 includes a wireless communication circuit 111 and a communication antenna ANT1 for communicating with the BMU 201. The CMU 101 also includes a voltage monitoring circuit 112 that monitors the voltages of the multiple battery cells 11. For example, the wireless communication circuit 111 and the voltage monitoring circuit 112 are implemented by different integrated circuits (ICs). Alternatively, the wireless communication circuit 111 and the voltage monitoring circuit 112 may be implemented by a single IC.

[0031] As shown in FIG. 3 , the wireless communication circuit 111 includes a voltage conversion circuit (Reg.) 121, a timer circuit (Timer) 122, a communication interface (Com. I / F) 123, a clock generation circuit (Clock gen) 124, a phase-locked loop (PLL) 125, a modulation circuit (Modulator) 126, a transmission circuit (Tx) 127, a demodulation circuit (Demodulator) 128, a reception circuit (Rx) 129, a communication error determination circuit (RF Error) 131, a wake-up circuit (Wake up) 132, and a pairing circuit (Paring) 133.

[0032] The voltage conversion circuit 121 is a circuit that converts the voltage input from the voltage monitoring circuit 112 into a voltage for operating the wireless communication circuit 111 and outputs the voltage.

[0033] The timer circuit 122 is a circuit that counts time. For example, the timer circuit 122 is used to cause the wireless communication circuit 111 to operate intermittently.

[0034] The communication interface 123 is an interface for communication between the wireless communication circuit 111 and the voltage monitoring circuit 112. Identification information "ID1A" is associated with the communication interface 123. The identification information of the communication interface 123 may be stored in any memory included in the wireless communication circuit 111. If the wireless communication circuit 111 and the voltage monitoring circuit 112 are implemented by a single IC, the communication interface 123 may not be provided.

[0035] The clock generation circuit 124 is a circuit for generating a clock in the CMU 101 .

[0036] The phase synchronization circuit 125 is a circuit that adjusts the phase of the local signal so that it coincides with the phase of the received signal.

[0037] The modulation circuit 126 is a circuit that modulates the signal to be transmitted to the BMU 201 .

[0038] The transmission circuit 127 is a circuit for transmitting a signal to the BMU 201. The transmission circuit 127 transmits the signal to the BMU 201 via the communication antenna ANT1.

[0039] The demodulation circuit 128 is a circuit that demodulates the signal received from the BMU 201 .

[0040] The receiving circuit 129 is a circuit for receiving a signal from the BMU 201. The receiving circuit 129 receives a signal from the BMU 201 via the communication antenna ANT1.

[0041] The communication error determination circuit 131 is a circuit that determines whether or not an abnormality has occurred in the communication between the CMU 101 and the BMU 201 .

[0042] The start-up circuit 132 is a circuit for starting up the wireless communication circuit 111 .

[0043] The pairing circuit 133 is a circuit for outputting a signal (also referred to as a second signal) for pairing registration. The pairing circuit 133 outputs the second signal when it receives a signal (also referred to as a first signal) containing the same identification information as its own identification information from the BMU 201. The pairing circuit 133 is connected to, for example, the LED 114, and outputs the second signal by causing the LED 114 to emit light.

[0044] The CMUs 102 and 103 each have the same configuration as the CMU 101. However, the communication interface 123 of the CMU 102 is associated with identification information "ID2A," and the communication interface 123 of the CMU 103 is associated with identification information "ID3A."

[0045] 2, for example, the CMU 101 may include an LED 113. The LED 113 emits light when the wireless communication circuit 111 satisfies a specific condition, for example.

[0046] As shown in FIG. 4, the voltage monitoring circuit 112 includes a voltage conversion circuit (Reg.) 141, a timer circuit (Timer) 142, a multiplexer (MUX) 143, an AD converter (ADC) 144, a communication interface (Com. I / F) 145, a phase-locked loop (PLL) 146, an encryption circuit (Encryption) 147, and a switch 148.

[0047] The voltage conversion circuit 141 is a circuit that converts the voltage input from the battery pack into a voltage for operating the voltage monitoring circuit 112 and outputs the voltage.

[0048] The timer circuit 142 is a circuit that counts time. For example, the timer circuit 142 is a circuit for intermittently operating the wireless communication circuit 111. Note that although the CMU 101 includes the timer circuits 122 and 142 in the wireless communication circuit 111 and the voltage monitoring circuit 112, it is not necessary to include both the timer circuits 122 and 142. In other words, the wireless communication circuit 111 does not have to include the timer circuit 122, and the voltage monitoring circuit 112 does not have to include the timer circuit 142.

[0049] The multiplexer 143 selects one battery cell 11 from the plurality of battery cells 11 and outputs the voltage across the selected battery cell 11. In other words, the multiplexer 143 can output the voltages of the plurality of battery cells 11.

[0050] The AD converter 144 converts the voltage value (analog value) of the battery cell 11 selected by the multiplexer 143 into a digital value.

[0051] The communication interface 145 is an interface for communication between the wireless communication circuit 111 and the voltage monitoring circuit 112. Note that if the wireless communication circuit 111 and the voltage monitoring circuit 112 are implemented by a single IC, the communication interface 145 does not need to be provided.

[0052] The phase synchronization circuit 146 is a circuit that adjusts the phase of the local signal so that it coincides with the phase of the received signal.

[0053] The encryption circuit 147 is a circuit that encrypts and decrypts signals. For example, the encryption circuit 147 encrypts signals to be transmitted to the wireless communication circuit 111 and eventually to the BMU 201 using an encryption key.

[0054] The switch 148 is a switch, such as a transistor, that switches on and off the supply of power to the wireless communication circuit 111. The switch 148 is controlled by a control signal from the startup circuit 132. The startup circuit 132 controls the switch 148 to control the supply of power to the wireless communication circuit 111, thereby controlling the startup of the wireless communication circuit 111.

[0055] The CMU 101 detects the voltage values ​​of each of the plurality of battery cells 11 using the voltage monitoring circuit 112 , and transmits the detected voltage values ​​to the BMU 201 using the wireless communication circuit 111 .

[0056] 2, the BMU 201 includes a wireless communication circuit 211 and a communication antenna ANT2 for communicating with the CMU 101, and a CAN interface (CAN (Control Area Network)) 213 for communicating with the setting circuit 501. The BMU 201 also includes an MCU (Micro Controller Unit) 212 for managing the battery pack. The wireless communication circuit 211, the MCU 212, and the CAN interface 213 may be implemented by a single IC (for example, a single MCU).

[0057] 5, the wireless communication circuit 211 includes a voltage conversion circuit (Reg.) 221, a timer circuit (Timer) 222, a communication interface (Com. I / F) 223, a clock generation circuit (Clock gen) 224, a phase-locked loop (PLL) 225, a modulation circuit (Modulator) 226, a transmission circuit (Tx) 227, a demodulation circuit (Demodulator) 228, a reception circuit (Rx) 229, a nonvolatile memory (NVM) 230, a communication error determination circuit (RF Error) 231, and a wake-up circuit (Wake up) 232. Also, in FIG. 5, "ID0A" is shown as identification information of the wireless communication circuit 211.

[0058] The voltage conversion circuit 221 is a circuit that converts a voltage input from an arbitrary power source into a voltage for operating the wireless communication circuit 211 and outputs the voltage.

[0059] The timer circuit 222 is a circuit that counts time.

[0060] The communication interface 223 is an interface for communication between the wireless communication circuit 211 and the MCU 212. Note that if the wireless communication circuit 211 and the MCU 212 are realized by a single IC, the communication interface 223 does not need to be provided.

[0061] The clock generation circuit 224 is a circuit for generating a clock in the BMU 201 .

[0062] The phase synchronization circuit 225 is a circuit that adjusts the phase of the local signal so that it matches the phase of the received signal.

[0063] The modulation circuit 226 is a circuit that modulates the signal to be transmitted to the CMU 101 .

[0064] The transmission circuit 227 is a circuit for transmitting a signal to the CMU 101. The transmission circuit 227 transmits the signal to the CMU 101 via the communication antenna ANT2.

[0065] The demodulation circuit 228 is a circuit that demodulates the signal received from the CMU 101 .

[0066] The receiving circuit 229 is a circuit for receiving a signal from the CMU 101. The receiving circuit 229 receives a signal from the CMU 101 via the communication antenna ANT2.

[0067] The nonvolatile memory 230 stores identification information of the wireless communication circuit 211. For example, the nonvolatile memory 230 stores identification information "ID0A." Although the nonvolatile memory 230 is shown in FIG. 5, the identification information may be stored in any memory included in the wireless communication circuit 211.

[0068] The communication error determination circuit 231 is a circuit that determines whether or not an abnormality has occurred in the communication between the CMU 101 and the BMU 201 .

[0069] The startup circuit 232 is a circuit for starting up the MCU 212 .

[0070] 6 , the MCU 212 includes an encryption circuit 241 and an identification circuit (ID identification circuit) 242. The MCU 212 also stores a table (Table of cell position and RF com. ID) 243 that indicates the correspondence between the positions of the multiple battery cells 11 in the battery pack 10 and the identification information of the wireless communication circuit of the CMU of each battery pack 10, etc.

[0071] The encryption circuit 241 is a circuit that encrypts and decrypts signals. For example, the encryption circuit 241 decrypts a signal (e.g., the voltage value of the battery cell 11) transmitted from the CMU 101 using an encryption key.

[0072] The identification circuit 242 uses the table 243 to identify the voltage value of the battery cell 11 included in the signal transmitted from the CMU 101 and the voltage value of the battery cell 11 at which position in which battery pack 10 .

[0073] The CAN interface 213 is an interface for communicating between the setting circuit 501 and the BMU 201 via a CAN. The CAN may be a CAN provided in a vehicle in which the assembled battery is mounted.

[0074] The BMU 201 may be connected to a CAN (Controller Area Network) and configured to be able to communicate with other circuits via the CAN.

[0075] The BMS 1 may include a CMU (Current Monitoring Unit) 301 as the monitoring circuit 100. When the BMS 1 includes the CMU 301, the BMS 1 may further include a relay 401. An example of the configuration when the BMS 1 includes the CMU 301 will be described.

[0076] 7 is a configuration diagram of a CMU 301 as an example of a current monitoring circuit according to the present embodiment. In addition to the CMU 301, a relay 401, a shunt resistor 402, and a power line 405 are also shown in FIG.

[0077] 7 , the CMU 301 includes a current measurement circuit 311 that measures the current flowing through the power line 405. The CMU 301 also includes a wireless communication circuit 312 and a communication antenna ANT3 for communicating with the BMU 201. For example, the current measurement circuit 311 and the wireless communication circuit 312 are implemented by different integrated circuits (ICs). Alternatively, the current measurement circuit 311 and the wireless communication circuit 312 may be implemented by a single IC.

[0078] The relay 401 is a switch for interrupting the current flowing through the power line 405. For example, when the current monitored by the CMU 301 is determined to be abnormal using the shunt resistor 402, the relay 401 is turned off to interrupt the current flowing through the power line 405. Furthermore, for example, when the voltage monitored by the CMU 101 or the like is determined to be abnormal, the relay is turned off to interrupt the current flowing through the power line 405.

[0079] FIG. 8 is an explanatory diagram showing an example of the configuration of a current measuring circuit included in the current monitoring circuit according to this embodiment.

[0080] As shown in FIG. 8, the current measuring circuit 311 includes an amplifier circuit 321 , an AD converter (ADC) 322 , a communication interface (Com. I / F) 323 , a phase locked loop (PLL) 324 , and an encryption circuit (Encryption) 325 .

[0081] The amplifier circuit 321 amplifies the voltage generated across the shunt resistor 402. The resistance value of the shunt resistor 402 is very small, and the voltage generated across the shunt resistor 402 is also small, so the amplifier circuit 321 is provided.

[0082] The AD converter 322 converts the value (analog value) of the voltage generated across the shunt resistor 402 into a digital value.

[0083] The communication interface 323 is an interface for communication between the wireless communication circuit 312 and the current measurement circuit 311. Note that if the wireless communication circuit 312 and the current measurement circuit 311 are realized by a single IC, the communication interface 323 does not need to be provided.

[0084] The phase synchronization circuit 324 is a circuit that adjusts the phase of the local signal so that it coincides with the phase of the received signal.

[0085] The encryption circuit 325 is a circuit that encrypts and decrypts signals. For example, the encryption circuit 325 encrypts signals to be transmitted to the wireless communication circuit 312 and eventually to the BMU 201 using an encryption key.

[0086] FIG. 9 is an explanatory diagram showing an example of the configuration of a wireless communication circuit included in the current monitoring circuit according to this embodiment.

[0087] 9, the wireless communication circuit 312 includes a voltage conversion circuit (Reg.) 331, a timer circuit (Timer) 332, a communication interface (Com. I / F) 333, a clock generation circuit (Clock gen) 334, a phase-locked loop (PLL) 335, an encryption circuit (Encryption) 336, a modulation circuit (Modulator) 337, a transmission circuit (Tx) 338, a demodulation circuit (Demodulator) 339, a reception circuit (Rx) 340, a communication error determination circuit (RF Error) 341, and a wake-up circuit (Wake up) 342. Also, in FIG. 9, "ID1A" is shown as identification information of the wireless communication circuit 312.

[0088] The voltage conversion circuit 331 is a circuit that converts a voltage input from an arbitrary power source into a voltage for operating the wireless communication circuit 312 and outputs the voltage.

[0089] The timer circuit 332 is a circuit that counts time.

[0090] The communication interface 333 is an interface for communication between the wireless communication circuit 312 and the current measurement circuit 311. Note that if the wireless communication circuit 312 and the current measurement circuit 311 are realized by a single IC, the communication interface 333 does not need to be provided.

[0091] The clock generation circuit 334 is a circuit for generating a clock in the CMU 301 .

[0092] The phase synchronization circuit 335 is a circuit that adjusts the phase of the local signal so that it coincides with the phase of the received signal.

[0093] The encryption circuit 336 is a circuit that encrypts and decrypts signals. For example, the encryption circuit 336 encrypts signals to be transmitted to the BMU 201 using an encryption key. Although the CMU 301 includes the encryption circuits 325 and 336 in the current measurement circuit 311 and the wireless communication circuit 312, it is not necessary for both the encryption circuits 325 and 336 to be included. In other words, the wireless communication circuit 312 does not have to include the encryption circuit 336, and the current measurement circuit 311 does not have to include the encryption circuit 325.

[0094] The modulation circuit 337 is a circuit that modulates the signal to be transmitted to the BMU 201 .

[0095] The transmission circuit 338 is a circuit for transmitting a signal to the BMU 201. The transmission circuit 338 transmits a signal to the BMU 201 via the communication antenna ANT3.

[0096] The demodulation circuit 339 is a circuit that demodulates the signal received from the BMU 201 .

[0097] The receiving circuit 340 is a circuit for receiving a signal from the BMU 201. The receiving circuit 340 receives a signal from the BMU 201 via the communication antenna ANT3.

[0098] The communication error determination circuit 341 is a circuit that determines whether or not an abnormality has occurred in the communication between the CMU 301 and the BMU 201 .

[0099] The start-up circuit 342 is a circuit for starting up the current measuring circuit 311 .

[0100] 7, for example, the CMU 301 may include an LED 313. The LED 313 emits light when the wireless communication circuit 312 satisfies a specific condition.

[0101] As shown in FIG. 2, the setting circuit 501 includes a communication interface (Com. I / F) 511 for communicating with the camera 521 and a CAN interface (CAN) 519 for communicating with the BMU 201 .

[0102] The communication interface 511 receives image data (also simply referred to as images) generated by the camera 521 through image capture from the camera 521. The camera 521 is disposed at a predetermined position where it can capture images of the multiple monitoring circuits. In other words, the camera 521 is disposed at a predetermined position where it can receive light emitted by LEDs (specifically, LEDs 114 of the CMU 101, etc.) provided in the multiple monitoring circuits.

[0103] The CAN interface 519 is an interface for communicating between the setting circuit 501 and the BMU 201 via the CAN.

[0104] The setting circuit 501 generates correspondence information through information processing performed by a processor (for example, a CPU (Central Processing Unit)) (not shown) using a memory.

[0105] The operation of the BMS 1 having the above circuit configuration will be described.

[0106] Fig. 10 is a flow diagram showing the operation of the BMS 1 according to this embodiment. Fig. 11 is an explanatory diagram showing an example of correspondence information according to this embodiment.

[0107] It is assumed that initially, the table 243 of the MCU 212 does not store the correspondence between the positions of each of the multiple battery cells 11 in the battery pack 10 and the identification information of the wireless communication circuit, etc. of the CMU of each battery pack 10. In this case, the BMS 1 first generates the correspondence and stores it in the table 243 of the MCU 212.

[0108] The BMU 201 wirelessly transmits a signal (also referred to as a first signal) including identification information of one of the multiple monitoring circuits (i.e., CMUs 101 to 103) to the multiple monitoring circuits (step S101). As an example, the BMU 201 transmits the first signal including identification information "ID1A." The identification information is information that can uniquely identify the monitoring circuit, and may be, for example, numerical information that can be expressed in several bytes (e.g., approximately 1 to 6 bytes).

[0109] Each of the plurality of monitoring circuits receives the first signal transmitted by the BMU 201. Each of the plurality of monitoring circuits determines whether the received first signal matches the identification information of the corresponding monitoring circuit (step S102), and outputs a second signal if it is determined that the first signal matches the identification information of the corresponding monitoring circuit (step S103).

[0110] For example, if the first signal includes the identification information "ID1A," CMU 101 determines that the received first signal matches the identification information of the monitoring circuit and outputs the second signal. On the other hand, CMUs 102 and 103 determine that the received first signal does not match the identification information of the monitoring circuit and do not output the second signal.

[0111] When outputting the second signal, the monitoring circuit outputs the second signal as light, for example. Specifically, the monitoring circuit outputs the second signal by causing a connected LED to emit light.

[0112] The setting circuit 501 generates and outputs correspondence information for the identification information included in the first signal transmitted by the BMU 201. The correspondence information generated by the setting circuit 501 is correspondence information that associates position information of one of the multiple monitoring circuits that output the second signal with the identification information included in the first signal received by the one monitoring circuit. The setting circuit 501 outputs the correspondence information to, for example, the BMU 201, but is not limited to, this.

[0113] Specifically, when generating and outputting the correspondence information, the setting circuit 501 acquires the position information of one of the plurality of monitoring circuits that has output the second signal (step S104).

[0114] When the monitoring circuit outputs the second signal as light, the setting circuit 501 acquires an image of multiple monitoring circuits, including the one monitoring circuit outputting the light, and performs image processing on the acquired image to identify position information of the one monitoring circuit, thereby generating and outputting correspondence information. For example, the image shows multiple monitoring circuits, and the multiple monitoring circuits include the one monitoring circuit outputting the light. The setting circuit 501 can identify the position information of the one monitoring circuit by calculating the position of the one monitoring circuit outputting the light among the multiple monitoring circuits through image processing.

[0115] Next, the setting circuit 501 acquires the identification information included in the first signal transmitted by the BMU 201 (step S105). The setting circuit 501 then generates and outputs correspondence information that associates the acquired position information and identification information (step S106). Specifically, the setting circuit 501 transmits the correspondence information to the BMU 201 via the CAN interface 519 and the CAN. The transmitted correspondence information is expected to be stored in the table 243 of the MCU 212.

[0116] An example of the correspondence information generated by the setting circuit 501 is shown in FIG.

[0117] The correspondence information is information that associates, for each of a plurality of monitoring circuits, the position information and identification information of the monitoring circuit. For example, in the correspondence information shown in FIG. 11 , the position information "Position 1" is associated with the identification information "ID1A." This indicates that a monitoring circuit with the identification information "ID1A" is located at the position "Position 1" in the BMS 1. The association between the position information "Position 1" and the identification information "ID1A" is generated by the setting circuit 501, for example, based on the fact that the CMU located at the position of the position information "Position 1" output light when the BMU 201 transmitted the identification information "ID1A."

[0118] Upon receiving the correspondence information transmitted in step S106, the BMU 201 can execute management processing of the assembled battery by using the received correspondence information to communicate with the monitoring device to manage the assembled battery (step S107).

[0119] As an example, when BMU201 acquires the status (e.g., voltage values) of multiple battery cells 11 monitored by a CMU (i.e., CMU102) assigned with identification information "ID2A," it broadcasts a request signal via wireless communication to cause the CMU assigned with identification information "ID2A" to send the monitoring results to BMU201.

[0120] CMU 101 receives the request signal, and since the request signal does not contain identification information that matches its own identification information "ID1A," CMU 101 determines that the request signal is not addressed to itself and does not process the received request signal.

[0121] The CMU 102 receives the request signal and, because the request signal contains identification information that matches its own identification information "ID2A," determines that the request signal is addressed to the CMU 102 and performs processing to transmit the monitoring results of the multiple battery cells 11 that it monitors to the BMU 201. Specifically, the CMU 102 acquires the voltage values ​​of each of the multiple battery cells 11 using the multiplexer 143 and transmits each voltage value, information indicating the position of the battery cell 11 at which each voltage value corresponds, and identification information of the CMU 101 to the BMU 201. For example, depending on which battery cell 11 the multiplexer 143 selected when acquiring a voltage value, it can identify the position of the battery cell 11 at which the voltage value corresponds.

[0122] In response to the request signal, the BMU 201 receives from the CMU 102 information indicating the voltage values ​​of the plurality of battery cells 11 monitored by the CMU 102. By comparing the information with the table 243, the BMU 201 can identify which battery pack 10 and which position the battery cell 11 is associated with for each of the plurality of battery cells 11.

[0123] When the monitoring device is the CMU 301, the CMU 301 receives the request signal and performs processing to transmit the monitoring results of the battery pack that it monitors to the BMU 201. Specifically, the CMU 301 measures the current flowing through the battery pack and transmits the results to the BMU 201. This allows the BMU 201 to obtain the current flowing through the battery pack.

[0124] (First Modification of the Embodiment) In this modification, another configuration example of the battery management system will be described.

[0125] 12 is an explanatory diagram showing the configuration of a BMS 1A, which is a battery management system according to this modification. The BMS 1A generates correspondence information based on visual confirmation by a user.

[0126] The CMU 101 and the like in this modification are the same as the CMU 101 and the like in the embodiment.

[0127] The BMU 201 of this modification is the same as the BMU 201 in the embodiment.

[0128] The setting circuit 501A includes an input terminal 511A.

[0129] The input terminal 511A receives, from a user, input of position information indicating the position of the monitoring circuit that is outputting light. It is assumed that the user visually checks the second signal output by the CMU 101 or the like when the CMU 101 or the like emits light, and inputs position information (e.g., Position 1, Position 2, etc.) indicating the position of the emitting CMU 101 or the like.

[0130] When acquiring the position information of the CMU in step S104 (see FIG. 10), the setting circuit 501A acquires the position information of the CMU 101, etc. input to the input terminal 511A. Then, the setting circuit 501A generates and outputs correspondence information by associating the acquired position information with identification information (step S106).

[0131] In this way, the setting circuit 501A can receive, from the user, the position information of the monitoring circuit that outputted the light, and generate and output correspondence information by associating the received position information with the identification information.

[0132] (Second Modification of the Embodiment) In this modification, another configuration example of the battery management system will be described.

[0133] 13 is an explanatory diagram showing the configuration of a BMS 1B, which is a battery management system according to this modification. The BMS 1B generates correspondence information using wired communication.

[0134] The CMU 101 etc. of this modification include a communication interface (Com. I / F) 114 B. The other configurations are the same as those of the CMU 101 etc. of the embodiment.

[0135] The pairing circuit 133 provided in the CMU 101 or the like is connected to the communication interface 114B. When the pairing circuit 133 receives a signal (first signal) including the same identification information as its own identification information from the BMU 201, the pairing circuit 133 outputs a second signal via the communication interface 114B.

[0136] The BMU 201 of this modification is the same as the BMU 201 in the embodiment.

[0137] The setting circuit 501B includes communication interfaces (Com. I / F) 511B, 512B, and 513B. Each of the communication interfaces (Com. I / F) 511B, etc. may correspond to a communication port.

[0138] The communication interface 511B is connected to the communication interface 114B of the CMU 101 via a communication line, and receives the second signal output by the communication interface 114B. The communication interface 511B is also associated with the position information "Position 1" of the monitoring circuit to which it is connected.

[0139] The communication interface 512B is connected to the communication interface 114B of the CMU 102 via a communication line, and receives the second signal output by the communication interface 114B. The communication interface 512B is also associated with the position information "Position 2" of the monitoring circuit to which it is connected.

[0140] The communication interface 513B is connected to the communication interface 114B of the CMU 103 via a communication line, and receives the second signal output by the communication interface 114B. The communication interface 513B is also associated with the position information "Position 3" of the monitoring circuit to which it is connected.

[0141] When any of the communication interfaces 511B, 512B, and 513B receives the second signal, the setting circuit 501B acquires location information associated with the communication interface that received the second signal, thereby acquiring location information indicating the location of the monitoring circuit that is outputting the second signal (step S104 (see FIG. 10)).The setting circuit 501B then associates the acquired location information with the identification information to generate and output correspondence information (step S106).

[0142] In this way, the setting circuit 501B can generate and output correspondence information using position information associated with one of the multiple communication interfaces that received the output second signal.

[0143] (Third Modification of the Embodiment) In this modification, another configuration example of the battery management system will be described.

[0144] 14 is an explanatory diagram showing the configuration of a BMS1C which is a battery management system according to this modification. The BMS1C generates correspondence information using wired communication including non-contact communication using light.

[0145] Each of the CMUs 101 etc. of this modification includes an LED 114C. The other configurations are the same as those of the CMUs 101 etc. of the embodiment.

[0146] The pairing circuit 133 provided in the CMU 101 or the like is connected to the LED 114C. When the pairing circuit 133 receives a signal (first signal) including the same identification information as its own identification information from the BMU 201, the pairing circuit 133 outputs a second signal by emitting light from the LED 114C.

[0147] The BMU 201 of this modification is the same as the BMU 201 in the embodiment.

[0148] The setting circuit 501C includes photo sensor circuits (Photo Sense.) 511C, 512C, and 513C.

[0149] The optical sensor circuit 511C is connected to the optical sensor element 521C. The optical sensor element 521C is located in a position where it can receive light output from the LED 114C of the CMU 101 (e.g., in a position close to the LED 114C, specifically within a few centimeters of the LED 114C; the same applies below). By receiving the light output from the LED 114C, the second signal is received. The optical sensor circuit 511C is also associated with the position information "Position 1" of the monitoring circuit to which it is connected. The optical sensor circuit 511C can also be considered a communication interface that performs contactless optical communication with the CMU 101 using elements that perform contactless optical communication (specifically, the LED 114C and the optical sensor element 521C). The LED 114C and the optical sensor element 521C can also be considered to form a photocoupler.

[0150] The optical sensor circuit 512C is connected to the optical sensor element 522C. The optical sensor element 522C is disposed in a position where it can receive the light output from the LED 114C of the CMU 102, and receives the second signal by receiving the light output from the LED 114C. The optical sensor circuit 512C is also associated with the position information "Position 2" of the monitoring circuit to which it is connected. Other features of the optical sensor circuit 512C are similar to those of the optical sensor circuit 511C.

[0151] The optical sensor circuit 513C is connected to the optical sensor element 523C. The optical sensor element 523C is disposed in a position where it can receive the light output from the LED 114C of the CMU 103, and receives the second signal by receiving the light output from the LED 114C. The optical sensor circuit 513C is also associated with the position information "Position 3" of the monitoring circuit to which it is connected. Other features of the optical sensor circuit 513C are similar to those of the optical sensor circuit 511C.

[0152] When any of the optical sensor circuits 511C, 512C, and 513C receives the second signal, the setting circuit 501C acquires location information associated with the communication interface that received the second signal, thereby acquiring location information indicating the location of the monitoring circuit that is outputting the second signal (step S104 (see FIG. 10)).The setting circuit 501C then associates the acquired location information with the identification information to generate and output correspondence information (step S106).

[0153] In this way, the setting circuit 501C can generate and output the corresponding information using a communication line having an element that performs non-contact communication using light.

[0154] (Fourth Modification of the Embodiment) In this modification, another configuration example of the battery management system will be described.

[0155] 15 is an explanatory diagram showing the configuration of a BMS 1D, which is a battery management system according to this modification. The BMS 1D generates and outputs correspondence information using wired communication including contactless communication using a magnetic field.

[0156] Each of the CMUs 101 etc. of this modification includes a coil 114D. The other configurations are the same as those of the CMUs 101 etc. of the embodiment.

[0157] The pairing circuit 133 provided in the CMU 101 or the like is connected to the coil 114D. When the pairing circuit 133 receives a signal (first signal) including the same identification information as its own identification information from the BMU 201, the pairing circuit 133 outputs a second signal by a magnetic field generated by the coil 114D.

[0158] The BMU 201 of this modification is the same as the BMU 201 in the embodiment.

[0159] The setting circuit 501D includes magnetic sensor circuits (Magnetic Sense.) 511D, 512D, and 513D.

[0160] The magnetic sensor circuit 511D is connected to a Hall switch 521D. The Hall switch 521D is disposed in a position where it can detect the magnetic field generated by the coil 114D of the CMU 101 (for example, in a position close to the coil 114D, specifically within a few centimeters of the coil 114D), and receives a second signal by detecting the magnetic field generated by the coil 114D. The magnetic sensor circuit 511D is also associated with position information "Position 1" of the monitoring circuit to which it is connected. The magnetic sensor circuit 511D can also be considered a communication interface that performs contactless communication with the CMU 101 using a magnetic field through elements (specific examples of which are the coil 114D and the Hall switch 521D) that perform contactless communication using a magnetic field.

[0161] The magnetic sensor circuit 512D is connected to a Hall switch 522D. The Hall switch 522D is disposed in a position where it can detect the magnetic field generated by the coil 114D of the CMU 102 (for example, in a position close to the coil 114D of the CMU 102), and receives a second signal by detecting the magnetic field generated by the coil 114D. The magnetic sensor circuit 512D is also associated with the position information "Position 2" of the monitoring circuit to which it is connected.

[0162] The magnetic sensor circuit 513D is connected to a hall switch 523D. The hall switch 523D is disposed in a position where it can detect the magnetic field generated by the coil 114D of the CMU 103 (for example, in a position close to the coil 114D of the CMU 103), and receives the second signal by detecting the magnetic field generated by the coil 114D. The magnetic sensor circuit 513D is also associated with position information "Position 3" of the monitoring circuit to which it is connected.

[0163] When any of the magnetic sensor circuits 511D, 512D, and 513D receives the second signal, the setting circuit 501D acquires position information associated with the communication interface that received the second signal, thereby acquiring position information indicating the position of the monitoring circuit that is outputting the second signal (step S104 (see FIG. 10)).The setting circuit 501D then associates the acquired position information with the identification information to generate and output correspondence information (step S106).

[0164] In this way, the setting circuit 501D can generate and output the corresponding information using a communication line having an element that performs contactless communication using a magnetic field.

[0165] (Fifth Modification of the Embodiment) In this modification, another configuration example of the battery management system will be described.

[0166] 16 is an explanatory diagram showing the configuration of a BMS 1E, which is a battery management system according to this modification. The BMS 1E generates and outputs correspondence information using wired communication including non-contact communication using sound waves.

[0167] Each of the CMUs 101 etc. of this modification includes a speaker 114E. The other configurations are the same as those of the CMUs 101 etc. of the embodiment.

[0168] The pairing circuit 133 provided in the CMU 101 or the like is connected to the speaker 114E. When the pairing circuit 133 receives a signal (first signal) including the same identification information as its own identification information from the BMU 201, the pairing circuit 133 outputs a second signal by a sound wave (in other words, sound) generated by the speaker 114E.

[0169] The BMU 201 of this modification is the same as the BMU 201 in the embodiment.

[0170] The setting circuit 501D includes sound wave sensor circuits (Sound Sense.) 511E, 512E, and 513E.

[0171] The ultrasonic sensor circuit 511E is connected to a microphone element 521E. The microphone element 521E is disposed in a position where it can detect the sound waves generated by the speaker 114E of the CMU 101 (for example, in a position close to the speaker 114E, specifically within a few centimeters of the speaker 114E), and receives a second signal by detecting the sound waves generated by the speaker 114E. The ultrasonic sensor circuit 511E is also associated with position information "Position 1" of the monitoring circuit to which it is connected. The ultrasonic sensor circuit 511E can also be said to be a communication interface that performs contactless communication using sound waves with the CMU 101 using elements that perform contactless communication using sound waves (specific examples are the speaker 114E and the microphone element 521E).

[0172] The ultrasonic sensor circuit 512E is connected to a microphone element 522E. The microphone element 522E is disposed in a position where it can detect the ultrasonic waves generated by the speaker 114E of the CMU 102 (for example, a position close to the speaker 114E of the CMU 102), and receives the second signal by detecting the ultrasonic waves generated by the speaker 114E. The ultrasonic sensor circuit 512E is also associated with position information "Position 2" of the monitoring circuit to which it is connected.

[0173] The ultrasonic wave sensor circuit 513E is connected to a microphone element 523E. The microphone element 523E is disposed in a position where it can detect the magnetic field generated by the speaker 114E of the CMU 103 (for example, a position close to the speaker 114E of the CMU 103), and receives the second signal by detecting the sound waves generated by the speaker 114E. The ultrasonic wave sensor circuit 513E is also associated with the position information "Position 3" of the monitoring circuit to which it is connected.

[0174] When any of the ultrasonic sensor circuits 511E, 512E, and 513E receives the second signal, the setting circuit 501E can acquire location information indicating the location of the monitoring circuit that is outputting the second signal (step S104 (see Figure 10)).The setting circuit 501E then generates and outputs corresponding information by associating the acquired location information with identification information (step S106).

[0175] In this way, the setting circuit 501E can generate and output correspondence information using a communication line having an element that performs non-contact communication using sound waves.

[0176] In addition, this disclosure also includes forms obtained by making various modifications to the embodiments that a person skilled in the art would think of, and forms realized by arbitrarily combining the components and functions in each embodiment within the scope of the present disclosure.

[0177] (Additional Notes) The above description of the embodiments discloses the following techniques.

[0178] (1) A battery management system for managing an assembled battery, comprising: a management circuit for managing the assembled battery; a plurality of monitoring circuits for monitoring the assembled battery; and a setting circuit, wherein the management circuit wirelessly transmits a first signal including identification information of one of the plurality of monitoring circuits to the plurality of monitoring circuits, each of the plurality of monitoring circuits having the identification information of the monitoring circuit, receives the first signal transmitted by the management circuit, and outputs a second signal if the received first signal matches the identification information of the monitoring circuit, and the setting circuit generates and outputs correspondence information that associates position information of the one of the plurality of monitoring circuits that output the second signal with the identification information included in the first signal transmitted by the management circuit.

[0179] According to the above aspect, the battery management system can appropriately determine the location of the monitoring circuit by using the correspondence information generated and output by the setting circuit. In this case, the setting circuit can appropriately generate the correspondence information using the second signal output by the monitoring circuit whose identification information matches the identification information included in the first signal wirelessly transmitted by the management circuit. In this way, the battery management system can appropriately determine the location of the monitoring circuit.

[0180] (2) The battery management system described in (1), wherein the one monitoring circuit outputs the second signal as light, and the setting circuit acquires an image of the plurality of monitoring circuits, including the one monitoring circuit that is outputting the light, and performs image processing on the acquired image to identify the position information of the one monitoring circuit, thereby generating and outputting the correspondence information.

[0181] According to the above aspect, the setting circuit can easily identify the positions of the monitoring circuits that are emitting light by performing image processing on an image that shows multiple monitoring circuits, and generate correspondence information. Therefore, the battery management system can more easily and appropriately determine the locations of the monitoring circuits by using the light output and image processing.

[0182] (3) The battery management system described in (1), wherein the one monitoring circuit outputs the second signal as light, and the setting circuit receives location information of the one monitoring circuit from a user, and generates and outputs the correspondence information by associating the received location information with the identification information.

[0183] According to the above aspect, the setting circuit can easily identify the location of the monitoring circuit that is outputting light and generate correspondence information using location information received from the user. The location information received from the user may be, for example, location information indicating the location of the monitoring circuit that is outputting light as determined visually by the user. Therefore, the battery management system can more easily and appropriately determine the location of the monitoring circuit using the light output and the user's determination.

[0184] (4) The setting circuit has a plurality of communication interfaces that are connected one-to-one with the plurality of monitoring circuits by communication lines, and each communication interface is associated with location information of the connected monitoring circuit, and one of the monitoring circuits outputs the second signal to the communication line connected to the setting circuit, and the setting circuit generates and outputs the correspondence information using location information associated with one of the plurality of communication interfaces that received the output second signal. This is a battery management system described in (1).

[0185] According to the above aspect, the setting circuit can easily identify the location of the monitoring circuit that is outputting the second signal by using the communication interface that received the second signal, and generate the correspondence information. Therefore, the battery management system can more easily and appropriately determine the location of the monitoring circuit by using the communication line (i.e., using wired communication).

[0186] (5) The battery management system according to (4), wherein the communication line has an element that performs non-contact communication using light.

[0187] According to the above aspect, the setting circuit can easily identify the location of the monitoring circuit outputting the second signal and generate correspondence information by using optical non-contact communication and wired communication while being isolated from the monitoring circuit. Because the setting circuit is isolated from the monitoring circuit, the setting circuit is less susceptible to currents or voltages that may be generated by the monitoring circuit and that may impair stable or safe operation of the setting circuit, thereby maintaining stable and safe operation. Therefore, the battery management system can appropriately determine the location of the monitoring circuit while maintaining more stable and safe operation.

[0188] (6) The battery management system according to (4), wherein the communication line has an element that performs contactless communication using a magnetic field.

[0189] According to the above aspect, the setting circuit can easily identify the location of the monitoring circuit outputting the second signal and generate correspondence information by using non-contact communication using a magnetic field and wired communication with the monitoring circuit while being insulated from the setting circuit. Because the setting circuit is insulated from the monitoring circuit, the setting circuit is less susceptible to currents or voltages that may be generated by the monitoring circuit and that could impair stable or safe operation of the setting circuit, thereby maintaining stable or safe operation. Therefore, the battery management system can appropriately determine the location of the monitoring circuit while maintaining more stable and safe operation.

[0190] (7) The battery management system according to (4), wherein the communication line has an element that performs contactless communication using sound waves.

[0191] According to the above aspect, the setting circuit can easily identify the location of the monitoring circuit that is outputting the second signal by using contactless communication using sound waves and wired communication while being isolated from the monitoring circuit. Being isolated from the monitoring circuit reduces the influence of the setting circuit on the current or voltage that the monitoring circuit may generate, thereby maintaining stable and safe operation. Therefore, the battery management system can appropriately determine the location of the monitoring circuit while maintaining stable and safe operation.

[0192] (8) A battery management system described in any one of (1) to (7), wherein the management circuit acquires the correspondence information for each of the plurality of monitoring circuits, and communicates with the plurality of monitoring circuits using the acquired correspondence information to manage the assembled battery.

[0193] According to the above aspect, the battery management system can more appropriately manage the assembled battery by identifying a monitoring circuit having specific identification information among the multiple monitoring circuits using the generated and output correspondence information. In this way, the battery management system can manage the assembled battery while appropriately understanding the locations of the monitoring circuits.

[0194] (9) A battery management system described in any one of (1) to (8), wherein the plurality of monitoring circuits include a cell monitoring circuit that monitors one or more battery cells that constitute the assembled battery, or a current monitoring circuit that measures the current flowing through the assembled battery.

[0195] According to the above aspect, the battery management system can more easily and appropriately determine the locations where the cell monitoring circuits or current monitoring circuits are located.

[0196] The present disclosure can be applied to a battery management system in which wireless communication is performed within the system.

[0197] 1, 1A, 1B, 1C, 1D, 1E BMS 10 Battery pack 11 Battery cell 20 Junction box 100 Monitoring circuit 101, 102, 103 CMU (Cell Monitoring Unit) 111, 211, 312 Wireless communication circuit 112 Voltage monitoring circuit 113, 114, 114C, 313 LED 114B, 123, 145, 223, 323, 333, 511, 511B, 512B, 513B Communication interface 114D Coil 114E Speaker 121, 141, 221, 331 Voltage conversion circuit 122, 142, 222, 332 Timer circuit 124, 224, 334 Clock generation circuit 125, 146, 225, 324, 335 Phase synchronization circuit 126, 226, 337 Modulation circuit 127, 227, 338 Transmission circuit 128, 228, 339 Demodulation circuit 129, 229, 340 Reception circuit 131, 231, 341 Communication error determination circuit 132, 232, 342 Startup circuit 133 Pairing circuit 143 Multiplexer 144, 322 AD converter 147, 241, 325, 336 Encryption circuit 148 Switch 200 Management circuit 201 BMU 212 MCU 213, 519 CAN interface 230 Non-volatile memory 242 Identification circuit 243 Table 301 CMU (Current Multimedia Unit) Monitoring Unit) 321 Amplification circuit 311 Current measurement circuit 400 Motor 401 Relay 402 Shunt resistor 405 Power line 501, 501A, 501B, 501C, 501D, 501E Setting circuit 511A Input terminal 511C, 512C, 513C Optical sensor circuit 511D, 512D, 513D Magnetic sensor circuit 511E, 512E, 513E Sound wave sensor circuit 521C, 522C, 523C Optical sensor element 521D, 522D, 523D Hall switch 521E, 522E, 523E Microphone element ANT1, ANT2, ANT3 Communication antenna

Claims

1. A battery management system for managing a battery pack, A management circuit for managing the battery pack; A plurality of monitoring circuits for monitoring the assembled battery; A setting circuit is provided. The management circuit wirelessly transmits a first signal to the plurality of monitoring circuits, the first signal including identification information of one of the plurality of monitoring circuits; Each of the plurality of monitoring circuits has identification information of the monitoring circuit, receives the first signal transmitted by the management circuit, and outputs a second signal when the received first signal matches the identification information of the monitoring circuit; The setting circuit generates and outputs correspondence information that associates position information of one of the plurality of monitoring circuits that outputs the second signal with the identification information included in the first signal transmitted by the management circuit. Battery management system.

2. The one monitoring circuit outputs the second signal as light, The setting circuit acquires an image of the plurality of monitoring circuits including the one monitoring circuit that is outputting the light, and performs image processing on the acquired image to identify position information of the one monitoring circuit, thereby generating and outputting the correspondence information. The battery management system according to claim 1 .

3. The one monitoring circuit outputs the second signal as light, The setting circuit receives position information of the one of the monitoring circuits from a user, and generates and outputs the corresponding information by associating the received position information with the identification information. The battery management system according to claim 1 .

4. The setting circuit includes: a plurality of communication interfaces connected one-to-one to the plurality of monitoring circuits by communication lines, the plurality of communication interfaces corresponding to position information of the connected monitoring circuits; The one monitoring circuit is outputting the second signal to the communication line connected to the setting circuit; The setting circuit includes: generating and outputting the correspondence information using position information associated with one of the plurality of communication interfaces that has received the output second signal; The battery management system according to claim 1 .

5. The communication line includes an element for performing non-contact communication using light. The battery management system according to claim 4.

6. The communication line includes an element for performing non-contact communication using a magnetic field. The battery management system according to claim 4.

7. The communication line includes an element for performing non-contact communication using acoustic waves. The battery management system according to claim 4.

8. The management circuit acquires the correspondence information for each of the plurality of monitoring circuits, and communicates with the plurality of monitoring circuits using the acquired correspondence information to manage the assembled battery. The battery management system according to any one of claims 1 to 7.

9. the plurality of monitoring circuits include a cell monitoring circuit that monitors one or more battery cells that constitute the battery pack, or a current monitoring circuit that measures a current flowing through the battery pack; The battery management system according to any one of claims 1 to 7.