CN217467119U - Fault monitoring device, battery management system and vehicle - Google Patents
Fault monitoring device, battery management system and vehicle Download PDFInfo
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- CN217467119U CN217467119U CN202220770124.8U CN202220770124U CN217467119U CN 217467119 U CN217467119 U CN 217467119U CN 202220770124 U CN202220770124 U CN 202220770124U CN 217467119 U CN217467119 U CN 217467119U
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Abstract
The present disclosure relates to a fault monitoring device, a battery management system, and a vehicle, the fault monitoring device (100) including: the heartbeat signal generating module (1) is arranged on a main controller BMU of the battery management system BMS and is used for generating a heartbeat signal; the transmission modules (2) are arranged on a plurality of cell monitoring Controllers (CMUs) of the BMS in a one-to-one correspondence manner, and each transmission module (2) is used for receiving the heartbeat signal and outputting the heartbeat signal under the condition of receiving an indication signal which is sent by a fault detection module in the corresponding CMU and used for indicating that no cell has fault; and the signal output module (3) is arranged on the BMU and is used for outputting a safety signal under the condition that the heartbeat signals transmitted by the plurality of transmission modules (2) are received within a preset time after the heartbeat signal generation module (1) sends the heartbeat signals, and outputting a fault signal under the condition that the heartbeat signals transmitted by the plurality of transmission modules (2) are not received within the preset time.
Description
Technical Field
The present disclosure relates to the field of batteries, and in particular, to a fault monitoring device, a battery management system, and a vehicle.
Background
In order to meet the cruising requirement of a vehicle, the number of the monomer electric cores connected in series in the power battery pack is more and more. Each single battery cell needs to be equipped with a battery cell monitoring controller to monitor and balance the voltage of the single battery cell. The more the single battery cells connected in series in the power battery pack, the more the battery cell monitoring controllers equipped in the battery management system are, and the greater the possibility that the battery cell monitoring controllers are invalid exists in all the battery cell monitoring controllers. In the related art, the transmission path of the fault information is a bus, and for an abnormal fault of the cell voltage, the cell monitoring controller generally sends out data through the bus.
SUMMERY OF THE UTILITY MODEL
The purpose of the present disclosure is to provide a fault monitoring device, a battery management system and a vehicle, wherein the fault monitoring device can reliably and quickly transmit fault information of a single battery cell.
In order to achieve the above object, the present disclosure provides a fault monitoring device including:
the heartbeat signal generating module is arranged on a main controller BMU of the battery management system BMS and used for generating a heartbeat signal;
the transmission modules are arranged on a plurality of cell monitoring Controllers (CMUs) of the BMS in a one-to-one correspondence manner, and each transmission module is used for receiving the heartbeat signal and outputting the heartbeat signal under the condition of receiving an indication signal which is sent by a fault detection module in the corresponding CMU and used for indicating that no fault exists in a cell;
and the signal output module is arranged on the BMU and used for outputting a safety signal under the condition that the heartbeat signals transmitted by the plurality of transmission modules are received within a preset time after the heartbeat signal generation module sends the heartbeat signals, and outputting a fault signal under the condition that the heartbeat signals transmitted by the plurality of transmission modules are not received within the preset time.
Optionally, the heartbeat signal input end of each transmission module is connected to the heartbeat signal output end of the heartbeat signal generation module or the heartbeat signal output end of the previous transmission module, and the heartbeat signal output end of each transmission module is connected to the heartbeat signal input end of the next transmission module or the heartbeat signal input end of the signal output module.
Optionally, the transmission module includes a first and gate, an optical coupler and a first resistor, a first input of the first and gate is connected to a heartbeat signal input end of the transmission module, a second input of the first and gate is connected to an output end of a fault detection module in a CMU where the transmission module is located, an anode input of the optical coupler is connected to an output end of the first and gate, and an output end of the optical coupler is connected to a heartbeat signal output end of the transmission module and passes through a first resistor ground wire.
Optionally, the heartbeat signal generating module includes a first switch tube and a second resistor, the base of the first switch tube is used for receiving the heartbeat signal and generating the indication signal, the collector of the first switch tube is connected to the power supply, and the emitter of the first switch tube is connected to the heartbeat signal output end of the heartbeat signal generating module and passes through the second resistor ground wire.
Optionally, the signal output module includes a second switch tube and a third resistor, the base of the second switch tube is connected to the heartbeat signal input end of the signal output module, the collector of the second switch tube is connected to the power supply, and the emitter of the second switch tube is connected to the safety signal output end of the signal output module and is connected to the power supply through the third resistor.
Optionally, the signal output module includes a second and gate, a second switch tube and a third resistor, a first input end of the second and gate is connected to the heartbeat signal input end of the signal output module, a second input end of the second and gate is configured to receive a first control signal, an output end of the second and gate is connected to a base of the second switch tube, and an emitter of the second switch tube is connected to the safety signal output end of the signal output module and is connected to the power supply through the third resistor.
Optionally, the signal output module includes an or gate, a second and gate, a second switch tube and a third resistor, the first input end of the or gate is connected to the heartbeat signal input end of the signal output module, the second input end of the or gate is connected to receive a second control signal, the output end of the or gate is connected to the first input end of the second and gate, the second input end of the second and gate is used to receive the first control signal, the output end of the second and gate is connected to the base of the second switch tube, and the emitter of the second switch tube is connected to the safety signal output end of the signal output module and is connected to the power supply through the third resistor.
Optionally, the signal output module further includes a blocking and voltage-stabilizing module, the first input end of the or gate is connected to the heartbeat signal input end of the signal output module through the blocking and voltage-stabilizing module, the blocking and voltage-stabilizing module includes a capacitor and a fourth resistor, the first end of the capacitor is connected to the heartbeat signal input end of the signal output module, the second end of the capacitor is connected to the first input end of the or gate, and the capacitor is connected to the ground through the fourth resistor.
The present disclosure also provides a battery management system, including the above-mentioned fault monitoring device.
The present disclosure also provides a vehicle including the battery management system.
Through the technical scheme, the heartbeat signal generation module and the signal output module are arranged on the main controller of the battery management system, and the transmission module is arranged on each battery cell monitoring controller. The transmission module can transmit the heartbeat signal generated by the heartbeat signal generation module under the condition of receiving an indication signal for indicating that the battery core has no fault. Therefore, when the signal output module receives the heartbeat signal, the single battery cell can be confirmed to have no fault and the battery cell monitoring controller can operate well; confirm that monomer electricity core or electricity core monitoring controller have the trouble when signal output module does not receive the heartbeat signal, output fault signal, fault information is difficult to disturbed or is omitted at the in-process of transmission. That is, the scheme provides to increase hardware failure transmission channel, and each CMU is connected through simple structure's hardwire, makes the fault signal more clear and definite, and transmission speed is faster, and the reliability is higher.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a block diagram of a fault monitoring device provided in an exemplary embodiment of the present disclosure.
Fig. 2 is a circuit diagram of a transmission module provided in an exemplary embodiment of the present disclosure.
Fig. 3 is a circuit diagram of a heartbeat signal generation module provided in an exemplary embodiment of the present disclosure.
Fig. 4 is a circuit diagram of a signal output module provided in an exemplary embodiment of the present disclosure.
Fig. 5 is a circuit diagram of a signal output module provided in yet another exemplary embodiment of the present disclosure.
Fig. 6 is a circuit diagram of a signal output module provided in still another exemplary embodiment of the present disclosure.
Fig. 7 is a circuit diagram of a dc blocking and voltage stabilizing module provided in an exemplary embodiment of the present disclosure.
Fig. 8 is a circuit diagram of a fault monitoring device provided in an exemplary embodiment of the present disclosure.
Description of the reference numerals
1 heartbeat signal generation module, 2 transmission module and 3 signal output module
4 first AND gate 5 opto-coupler 6 first resistor
7a first switch tube 8, a second resistor 9 and a second switch tube
10 third resistor 11 second and gate 12 or gate
13 blocking DC voltage stabilizing module 14, capacitor 15 and fourth resistor
4a first input terminal of the first and gate 4b second input terminal of the first and gate
9a base electrode of the second switch tube 9b emitter electrode of the second switch tube
11a first input terminal of a second and gate 11b second input terminal of the second and gate
12a first input 12b of an or gate or a second input of a gate
14a first terminal of the capacitor 14b second terminal of the capacitor
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
It should be noted that all actions of acquiring signals, information or data in the present disclosure are performed under the premise of complying with the corresponding data protection regulation policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.
Fig. 1 is a block diagram of a fault monitoring device provided in an exemplary embodiment of the present disclosure. As shown in fig. 1, the fault monitoring apparatus 100 includes a heartbeat signal generation module 1, a plurality of transmission modules 2 (two transmission modules 2 are exemplarily shown in fig. 1), and a signal output module 3.
The heartbeat signal generating module 1 is disposed on a main controller (BMU) of a Battery Management System (BMS) and configured to generate a heartbeat signal. The plurality of transmission modules 2 are arranged on a plurality of Cell Monitor Units (CMUs) of the BMS in a one-to-one correspondence manner, and each transmission module 2 is configured to receive a heartbeat signal and output the heartbeat signal when receiving an indication signal, which is sent by a failure detection module in the corresponding CMU and used for indicating that a Cell has no failure, from the Cell. The signal output module 3 is disposed on the BMU, and configured to output a safety signal when receiving the heartbeat signal transmitted by the plurality of transmission modules 2 within a predetermined time period after the heartbeat signal generation module 1 sends the heartbeat signal, and output a failure signal when not receiving the heartbeat signal transmitted by the plurality of transmission modules 2 within the predetermined time period.
The heartbeat signal may be a high level signal, a Pulse Width Modulation (PWM) PWM wave with an adjustable duty ratio, a PWM wave with an adjustable frequency, or a sine wave. The number of transmission modules 2 may be equal to the number of CMUs in the BMS, i.e., one transmission module 2 is disposed on each CMU in the BMS. The fault detection module is a module, which is used on the CMU, for detecting whether a fault exists in a battery cell corresponding to the CMU (for example, whether an overvoltage or an undervoltage condition exists in the battery cell). When no fault exists in the single battery cell, the fault detection module sends an indication signal to the transmission module 2, and the indication signal is a signal for representing that the battery cell has no fault. The transmission module 2 outputs the heartbeat signal when receiving the heartbeat signal output by the heartbeat signal generation module or the heartbeat signal output by the previous transmission module 2, and outputs the heartbeat signal under the condition of receiving the indication signal, otherwise, does not output the heartbeat signal. And the signal output module 3 outputs a safety signal under the condition that the heartbeat signals transmitted by all the transmission modules 2 are received, wherein the safety signal is used for representing that all the single battery cores have no fault. The predetermined time period is preset by a designer, for example, the predetermined time period may be 3 seconds. The fault signal is a signal for indicating that a single battery cell exists in the battery pack or a battery cell monitoring controller has a fault.
Through the technical scheme, the heartbeat signal generation module and the signal output module are arranged on the main controller of the battery management system, and the transmission module is arranged on each battery cell monitoring controller. The transmission module can transmit the heartbeat signal generated by the heartbeat signal generation module under the condition of receiving an indication signal for indicating that the electric core has no fault. Therefore, when the signal output module receives the heartbeat signal, the single battery cell can be confirmed to have no fault, and the battery cell monitoring controller can be confirmed to operate well; confirm that monomer electricity core or electricity core monitoring controller have the trouble when signal output module does not receive the heartbeat signal, output fault signal, fault information is difficult to disturbed or is omitted at the in-process of transmission. That is, the scheme provides to increase hardware failure transmission channel, and each CMU is connected through simple structure's hardwire, makes the fault signal more clear and definite, and transmission speed is faster, and the reliability is higher.
In another embodiment, the heartbeat signal input terminal of each transmission module 2 is connected to the heartbeat signal output terminal of the heartbeat signal generating module 1 or the heartbeat signal output terminal of the previous transmission module 2, and the heartbeat signal output terminal of each transmission module 2 is connected to the heartbeat signal input terminal of the next transmission module 2 or the heartbeat signal input terminal of the signal output module 3.
In this embodiment, when the signal output module receives the heartbeat signal, all the transmission modules 2 participate in transmission of the heartbeat signal and confirm that no fault exists in the cell electric cores corresponding to all the transmission modules 2. When there is the trouble in monomer electricity core, heartbeat signal can not transmit to signal output module 3, and signal output module output fault signal, like this, when monomer electricity core has the trouble, BMU can obtain the information that has monomer electricity core to have the trouble for fault information can not omit in the transmission course, also is difficult to disturbed.
Moreover, the plurality of transmission modules 2 are connected in a 'serial connection' manner, when one of the transmission modules 2 fails to transmit the heartbeat signal due to the failure of the battery cell, the transmission module 2 at the downstream cannot receive the heartbeat signal, and data transmission is not performed any more. In the embodiment, the signal output module only receives one path of signal, and the signal is simple and high in reliability.
Fig. 2 is a circuit diagram of a transmission module provided in an exemplary embodiment of the present disclosure. In another embodiment, as shown in fig. 2, the transmission module 2 includes a first and gate 4, an optical coupler 5 and a first resistor 6, a first input end 4a of the first and gate 4 is connected to a heartbeat signal input end of the transmission module 2, a second input end 4b of the first and gate is connected to an output end of a fault detection module in the CMU where the transmission module 2 is located, an anode input end of the optical coupler is connected to an output end of the first and gate, and an output end 5a of the optical coupler is connected to a heartbeat signal output end of the transmission module 2 and is connected to a ground through the first resistor 6.
In this embodiment, a circuit diagram of the transmission module 2 is specifically shown, and with the use of an and gate circuit and an optocoupler, when the heartbeat signal and the indication signal are received at the same time, that is, when it is determined that the single battery cell corresponding to the transmission module 2 is not faulty, the heartbeat signal is continuously transmitted backward, so that the reliability is high.
Fig. 3 is a circuit diagram of a heartbeat signal generation module provided in an exemplary embodiment of the present disclosure. As shown in fig. 3, the heartbeat signal generating module 1 includes a first switch tube 7 and a second resistor 8, a base of the first switch tube is used for receiving the heartbeat signal generation indication signal, a collector of the first switch tube 7 is connected to the power supply, and an emitter 7a of the first switch tube 7 is connected to the heartbeat signal output end of the heartbeat signal generating module 1 and is grounded through the second resistor.
The first switch tube 7 may be a triode, a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET, referred to as MOS tube for short), or the like. In the embodiment, different types of heartbeat signal generation signals can be input into the base electrode of the electric first switching tube, a simple switching tube and a resistor are used for generating the heartbeat signal meeting the requirement, and the electric first switching tube is simple in structure and high in reliability.
Fig. 4 is a circuit diagram of a signal output module provided in an exemplary embodiment of the present disclosure. As shown in fig. 4, the signal output module 3 includes a second switch tube 9 and a third resistor 10, a base 9a of the second switch tube is connected to the heartbeat signal input terminal of the signal output module 3, a collector of the second switch tube is connected to the power supply (VCC), and an emitter 9b of the second switch tube is connected to the safety signal output terminal of the signal output module 3 and is connected to the power supply (VCC) through the third resistor 10.
The second switch tube 9 may be a triode, a MOS tube, etc. In the embodiment, when the heartbeat signal transmitted by the transmission module 2 is received, the safety signal is output, no fault exists in the single battery cell in the characterization battery pack, the single battery cell or the CMU can be determined to have the fault in time when the BMS does not receive the safety signal, the safety signal is output by utilizing a simple switch tube and a resistor, and the fault signal is output when the heartbeat signal transmitted by the transmission module 2 is not received, so that the structure is simple, and the reliability is high.
Fig. 5 is a circuit diagram of a signal output module provided in yet another exemplary embodiment of the present disclosure. As shown in fig. 5, the signal output module 3 includes a second and gate 11, a second switch tube 9 and a third resistor 10, a first input end 11a of the second and gate is connected to the heartbeat signal input end of the signal output module 3, a second input end 11b of the second and gate is used for receiving the first control signal, an output end of the second and gate is connected to a base of the second switch tube, and an emitter 9b of the second switch tube is connected to the safety signal output end of the signal output module 3 and is connected to a power supply (VCC) through the third resistor 10.
The first control signal may be a control signal generated by a software system in the BMS to indicate whether the software system in the BMS allows the safety signal to be output. In this embodiment, the second and gate 11 is arranged so that the signal output module 3 outputs the safety signal when receiving the signal transmitted from the transmission module 2 in the case where the software system allows the safety signal to be output. Therefore, when the software system of the BMS finds that the single battery cell is abnormal, the fault signal is output.
Fig. 6 is a circuit diagram of a signal output module provided in still another exemplary embodiment of the present disclosure. As shown in fig. 6, the signal output module 3 includes an or gate 12, a second and gate 11, a second switch tube 9 and a third resistor 10, a first input end 12a of the or gate is connected to the heartbeat signal input end of the signal output module 3, a second input end 12b of the or gate is connected to receive the second control signal, an output end of the or gate is connected to a first input end 11a of the second and gate, a second input end 11b of the second and gate is used for receiving the first control signal, an output end of the second and gate is connected to a base of the second switch tube, and an emitter 9b of the second switch tube is connected to the safety signal output end of the signal output module 3 and is connected to the power supply through the third resistor 10.
The second control signal may be a signal generated by the software system of the BMS to mask (ignore) the heartbeat signal transmitted from the transmission module 2. After the second control signal is set to be 1, the or gate 12 always outputs a high level, and at this time, no matter whether the electric core has a fault, the safety signal can be set to be 1. In this embodiment, an or gate 12 is provided in the signal output module 3, and the heartbeat signal can be masked.
Fig. 7 is a circuit diagram of a dc blocking and voltage stabilizing module provided in an exemplary embodiment of the present disclosure. As shown in fig. 7, in another embodiment, the signal output module 3 further includes a dc blocking and voltage stabilizing module 13, and the first input terminal 12a of the or gate is connected to the heartbeat signal input terminal of the signal output module 3 through the dc blocking and voltage stabilizing module; the blocking and voltage stabilizing module 13 comprises a capacitor 14 and a fourth resistor 15, a first end 14a of the capacitor is connected to the heartbeat signal input end of the signal output module 3, a second end 14b of the capacitor is connected to the first input end of the or gate, and the ground wire is connected through the fourth resistor 15.
In this embodiment, the signal output module 3 introduces the blocking and voltage stabilizing module, so that if the heartbeat signal generated by the heartbeat signal generating module 1 is PWM wave, and the heartbeat signal is transmitted to the signal output module 3 through the plurality of transmission modules 2, the blocking and voltage stabilizing module can block and stabilize the heartbeat signal, thereby improving the stability and safety of the transmission process of the heartbeat signal.
Fig. 8 is a circuit diagram of a fault monitoring device provided in an exemplary embodiment of the present disclosure. The connection mode between the components in this embodiment has been described in detail in the above embodiment, and is not described again to avoid necessary repetition.
The present disclosure also provides a battery management system, including the fault monitoring device described in the above embodiment.
The present disclosure also provides a vehicle including the battery management system.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A fault monitoring device, characterized in that the fault monitoring device (100) comprises:
the heartbeat signal generating module (1) is arranged on a main controller BMU of the battery management system BMS and is used for generating a heartbeat signal;
the transmission modules (2) are arranged on a plurality of cell monitoring Controllers (CMUs) of the BMS in a one-to-one correspondence manner, and each transmission module (2) is used for receiving the heartbeat signal and outputting the heartbeat signal under the condition of receiving an indication signal which is sent by a fault detection module in the corresponding CMU and used for indicating that no fault exists in the cell;
the signal output module (3) is arranged on the BMU and is used for outputting a safety signal when the heartbeat signal transmitted by the plurality of transmission modules (2) is received within a preset time after the heartbeat signal generating module (1) sends the heartbeat signal, and outputting a fault signal when the heartbeat signal transmitted by the plurality of transmission modules (2) is not received within the preset time.
2. The fault monitoring device according to claim 1, wherein the heartbeat signal input end of each transmission module (2) is connected with the heartbeat signal output end of the heartbeat signal generating module (1) or the heartbeat signal output end of the previous transmission module (2), and the heartbeat signal output end of each transmission module (2) is connected with the heartbeat signal input end of the next transmission module (2) or the heartbeat signal input end of the signal output module (3).
3. The fault monitoring device according to claim 1, wherein the transmission module (2) comprises a first and gate (4), an optical coupler (5) and a first resistor (6), a first input end (4a) of the first and gate (4) is connected to a heartbeat signal input end of the transmission module (2), a second input end (4b) of the first and gate is connected to an output end of a fault detection module in the CMU where the transmission module (2) is located, a positive input end of the optical coupler is connected to an output end of the first and gate, and an output end (5a) of the optical coupler is connected to a heartbeat signal output end of the transmission module (2) and is grounded through the first resistor (6).
4. The fault monitoring device according to claim 1, wherein the heartbeat signal generating module (1) comprises a first switch tube (7) and a second resistor (8), wherein a base of the first switch tube is used for receiving the heartbeat signal generation indicating signal, a collector of the first switch tube (7) is connected with a power supply, and an emitter (7a) of the first switch tube (7) is connected with a heartbeat signal output end of the heartbeat signal generating module (1) and is connected with a ground wire through the second resistor.
5. The fault monitoring device according to claim 1, characterized in that the signal output module (3) comprises a second switch tube (9) and a third resistor (10), wherein the base (9a) of the second switch tube is connected with the heartbeat signal input end of the signal output module (3), the collector of the second switch tube is connected with the power supply, and the emitter (9b) of the second switch tube is connected with the safety signal output end of the signal output module (3) and is connected with the power supply through the third resistor (10).
6. The fault monitoring device according to claim 1, wherein the signal output module (3) comprises a second and gate (11), a second switch tube (9) and a third resistor (10), a first input end (11a) of the second and gate is connected to a heartbeat signal input end of the signal output module (3), a second input end (11b) of the second and gate is used for receiving a first control signal, an output end of the second and gate is connected to a base electrode of the second switch tube, and an emitter (9b) of the second switch tube is connected to a safety signal output end of the signal output module (3) and is connected to a power supply through the third resistor (10).
7. Fault monitoring device according to claim 1, characterised in that the signal output module (3) comprises an OR gate (12), a second AND gate (11), a second switching tube (9) and a third resistor (10), the first input end (12a) of the OR gate is connected with the heartbeat signal input end of the signal output module (3), the second input end (12b) of the OR gate is connected with the first input end (11a) of the second AND gate for receiving a second control signal, the output end of the OR gate is connected with the first input end (11a) of the second AND gate, a second input end (11b) of the second AND gate is used for receiving a first control signal, the output end of the second AND gate is connected with the base electrode of the second switch tube, and an emitting electrode (9b) of the second switching tube is connected with a safety signal output end of the signal output module (3) and is connected with a power supply through the third resistor (10).
8. The fault monitoring device according to claim 7, wherein the signal output module (3) further comprises a dc blocking and voltage stabilizing module (13), the first input terminal (12a) of the or gate is connected to the heartbeat signal input terminal of the signal output module (3) through the dc blocking and voltage stabilizing module (13), the dc blocking and voltage stabilizing module (13) comprises a capacitor (14) and a fourth resistor (15), the first terminal (14a) of the capacitor is connected to the heartbeat signal input terminal of the signal output module (3), and the second terminal (14b) of the capacitor is connected to the first input terminal of the or gate and is connected to the ground through the fourth resistor (15).
9. A battery management system comprising a fault monitoring device as claimed in any one of claims 1 to 8.
10. A vehicle characterized by comprising the battery management system of claim 9.
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| CN202220770124.8U CN217467119U (en) | 2022-04-02 | 2022-04-02 | Fault monitoring device, battery management system and vehicle |
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| CN202220770124.8U CN217467119U (en) | 2022-04-02 | 2022-04-02 | Fault monitoring device, battery management system and vehicle |
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