Identification method, battery system, energy storage power source and storage medium

Abstract

Disclosed are an identification method, a battery system (10), an energy storage power source (100) and a storage medium. The identification method is used for a battery system (10), wherein the battery system (10) comprises a plurality of battery modules (11), each battery module (11) comprises a battery management system board (111), and the battery management system board (111) comprises an input interface (1111). The identification method comprises: acquiring a level of the input interface (1111) of the battery management system board (111); when the level of the input interface (1111) is a low level, determining that a battery module (11) corresponding to the battery management system board (111) is a master module; and when the level of the input interface (1111) is a high level, determining that the battery module (11) corresponding to the battery management system board (111) is a slave module.

Description

Identification method, battery system, energy storage power supply and storage medium

[0001] Priority information

[0002] The present application claims priority to and the benefit of the filing date of Chinese Patent Application No. 202411263153.5, filed September 9, 2024, and which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of energy storage power supply, and more particularly, to an identification method, a battery system, an energy storage power supply, and a non-volatile computer readable storage medium. BACKGROUND

[0004] In the related art energy storage power supply, when multiple battery modules are connected in parallel or in series, the battery system needs to identify the master module and the slave module, so that the battery system uses the battery management system board of the master module to control the battery management system board of the slave module to enable the slave module to charge and discharge.

[0005] However, the inventors have realized that the material number of the battery management system board installed in the master module is inconsistent with that of the battery management system board installed in the slave module, and when installing the battery management system board of the master module and the battery management system board of the slave module, it is easy to cause installation confusion, which leads to the battery system being unable to distinguish between the master module and the slave module, and reduces the installation efficiency. SUMMARY

[0006] The present application provides an identification method, a battery system, an energy storage power supply, and a non-volatile computer readable storage medium.

[0007] The identification method of the present application is used in a battery system, which includes multiple battery modules, each battery module including a battery management system board, and the battery management system board including an input interface. The identification method includes obtaining the level of the input interface of the battery management system board; in the case that the level of the input interface is a low level, confirming that the module corresponding to the battery management system board is a master module; and in the case that the level of the input interface is a high level, confirming that the module corresponding to the battery management system board is a slave module.

[0008] In the above embodiment, by obtaining the level of the input interface of the battery management system board, it can be determined whether the battery module is a master module or a slave module, without the need to separately provide battery management system boards with different material numbers for each battery module, thereby avoiding confusion during installation, reducing the version management cost of the battery system, and improving the installation efficiency.

[0009] The battery system of the embodiments of the present application comprises a processor, a memory, and a computer program, wherein the computer program is stored in the memory and executed by the processor, and the computer program comprises instructions for executing the above-mentioned identification method.

[0010] The energy storage power supply of the embodiments of the present application comprises an inverter and the above-mentioned battery system, and the inverter is electrically connected to the battery system.

[0011] The embodiments of the present application provide a non-volatile computer readable storage medium comprising a computer program, which, when executed by a processor, causes the processor to execute the above-mentioned identification method.

[0012] Additional aspects and advantages of the embodiments of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0014] Fig. 1 is a structural schematic diagram of an energy storage power supply according to some embodiments of the present application;

[0015] Fig. 2 is a flow schematic diagram of an identification method according to some embodiments of the present application;

[0016] Fig. 3 is a structural schematic diagram of a battery system according to some embodiments of the present application;

[0017] Fig. 4 is a flow schematic diagram of an identification method according to some embodiments of the present application;

[0018] Fig. 5 is a structural schematic diagram of a battery system according to some embodiments of the present application;

[0019] Fig. 6 is a flow schematic diagram of an identification method according to some embodiments of the present application;

[0020] Fig. 7 is a connection state schematic diagram of a non-volatile computer readable storage medium and a processor according to some embodiments of the present application.

[0021] BRIEF DESCRIPTION OF DRAWINGS DETAILED DESCRIPTION

[0022] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as a limitation on the embodiments of the present application.

[0023] The embodiments of the present application provide a recognition method for a battery system 10, please refer to FIG. 2 and FIG. 3, the battery system 10 includes a plurality of battery modules 11, each battery module 11 includes a battery management system board 111, the battery management system board 111 includes an input interface 1111. The recognition method includes:

[0024] Obtaining the level of the input interface 1111 of the battery management system board 111;

[0025] In the case that the level of the input interface 1111 is a first level, confirming that the module corresponding to the battery management system board 111 is a master module 112;

[0026] In the case that the level of the input interface 1111 is a second level different from the first level, confirming that the module corresponding to the battery management system board 111 is a slave module 113.

[0027] Please refer to FIG. 1, which is used as an example to illustrate that the first level is low and the second level is high. The recognition method includes:

[0028] Step 011: obtaining the level of the input interface 1111 of the battery management system board 111;

[0029] Step 012: in the case that the level of the input interface 1111 is low, confirming that the module corresponding to the battery management system board 111 is a master module 112;

[0030] Step 013: in the case that the level of the input interface 1111 is high, confirming that the module corresponding to the battery management system board 111 is a slave module 113.

[0031] It can be understood that in other embodiments, the first level is high and the second level is low.

[0032] In this way, by obtaining the level of the input interface 1111 of the battery management system board 111, it can be distinguished whether the battery module 11 is a master module 112 or a slave module 113, without setting different material numbers of battery management system boards 111 for each battery module 11, avoiding confusion during installation, thereby reducing the version management cost of the battery system 10 and improving the installation efficiency.

[0033] The energy storage power supply 100 is a device capable of storing electrical energy and can be used as a mobile power supply. The energy storage power supply 100 includes a battery system 10 capable of controlling the charging and discharging process of the energy storage power supply 100, controlling the temperature of the energy storage power supply 100, preventing damage to the energy storage power supply 100 caused by overheating or overcooling, controlling the overvoltage, undervoltage, overcurrent and short circuit protection measures of the energy storage power supply 100, and monitoring the state and performance of the energy storage power supply 100 in real time.

[0034] The battery system 10 includes a plurality of battery modules 11 capable of storing and releasing electrical energy, and each battery module 11 includes a battery management system board 111 on which a battery management system (BMS) is disposed, capable of monitoring and managing the charging and discharging process of the battery module 11, ensuring the safety and performance stability of the battery module 11. An input interface 1111 is disposed on the battery management system board 111, which can be used to receive external input signals. For example, the input interface 1111 includes a CAN (Controller Area Network) bus interface, which is a communication protocol used in the automotive and industrial fields, and the battery management system board 111 can exchange data and communicate with other devices through the CAN interface.

[0035] The input interface 1111 includes a high-voltage detection interface for receiving a high-voltage signal of the battery pack for voltage detection and insulation detection.

[0036] The input interface 1111 includes a MODBUS interface, which is a communication protocol for transmitting data between different devices. The battery management system board 111 can exchange data with devices or systems (such as monitoring systems, PLCs, etc.) that support the protocol through the MODBUS interface.

[0037] The input interface 1111 includes an RS485 interface, which is a serial communication protocol suitable for transmitting data over long distances. The battery management system board 111 can exchange data with other RS485 devices through the RS485 interface.

[0038] The input interface 1111 includes an RS232 interface, which is also a serial communication protocol, commonly used for short-distance data transmission. Although RS232 has been gradually replaced by interfaces such as USB in modern automobiles and industrial applications, it may still be used in some old systems or specific applications.

[0039] The input interface 1111 includes an Ethernet interface, through which the battery management system board 111 can be connected to a local area network (LAN) or the Internet with other devices or systems, to realize remote monitoring and data exchange.

[0040] The input interface 1111 includes a Wi-Fi and Bluetooth interface, and some battery management system boards 111 support Wi-Fi and Bluetooth wireless communication protocols, so as to exchange data with other wireless devices and realize remote monitoring.

[0041] The energy storage power supply 100 includes a processor 20 and a memory 30. The processor 20 can be a micro control unit, and the memory 30 can store a computer program 31 containing instructions for executing the identification method, and the processor 20 can execute the computer program 31 containing instructions for executing the identification method.

[0042] Specifically, in the case of installing a plurality of battery modules 11 in the energy storage power supply 100, it is necessary to distinguish the master module 112 and the slave module 113. The master module 112 is used to realize the function of the master battery module 11, and the slave module 113 is used to realize the function of the slave battery module 11, and the functions realized by the two are different. The battery management system board 111 of the master module 112 needs to do the logic algorithm of the whole battery system 10, control the charging and discharging logic of each slave module 113, and communicate with external modules (such as inverter 40, DCDC module, WIFI, Bluetooth) to complete the input and output power control. The battery management system board 111 of the slave module 113 is used to receive the command of the battery management system board 111 of the master module 112 to execute the charging and discharging action of the slave module 113.

[0043] The processor 20 can acquire the level of the input interface 1111 of the battery management system board 111. For example, the processor 20 can be a micro controller unit (MCU). When the plurality of battery modules 11 are installed in the energy storage power supply 100, the processor 20 can send an identification signal to the input interface 1111 of the battery module 11, and enable the processor 20 to actively detect the level of the input interface 1111 of the plurality of battery modules 11. In an embodiment, when the processor 20 detects that the level of the input interface 1111 is low, the processor 20 can confirm that the battery module 11 corresponding to the battery management system board 111 is the master module 112, and the software on the battery management system board 111 can be determined as the master module 112; when the processor 20 detects that the level of the input interface 1111 is high, the processor 20 can confirm that the battery module 11 corresponding to the battery management system board 111 is the slave module 113, and the software on the battery management system board 111 can be determined as the slave module 113. Thus, the master module 112 and the slave module 113 can be distinguished among the plurality of battery modules 11.

[0044] In an embodiment, when the processor 20 detects that the level of the input interface 1111 is high, the processor 20 can confirm that the battery module 11 corresponding to the battery management system board 111 is the master module 112, and the software on the battery management system board 111 can be determined as the master module 112; when the processor 20 detects that the level of the input interface 1111 is low, the processor 20 can confirm that the battery module 11 corresponding to the battery management system board 111 is the slave module 113, and the software on the battery management system board 111 can be determined as the slave module 113. Thus, the master module 112 and the slave module 113 can be distinguished among the plurality of battery modules 11.

[0045] Referring to FIG. 4, in some embodiments, before the step of acquiring the level of the input interface 1111 of the battery management system board 111 in step 011, the identification method comprises:

[0046] Step 014: Control the power-on of the battery system 10, and enable the battery management system board 111 to perform self-checking.

[0047] In this way, by controlling the connection of the power supply to the battery system 10, the power supply can supply power to the battery management system board 111 to start the battery management system, so as to enable the detection of the battery module 11 for identifying the master module 112 and the slave module 113.

[0048] Specifically, after the battery module 11 is installed, the energy storage power supply 100 can control the battery system 10 to power on. For example, an external power supply can be connected to the energy storage power supply 100 and supply power to the energy storage power supply 100, so that the battery module 11 is in a charging state. At the same time, the external power supply can provide power to the battery system 10, so that the battery system 10 starts to run and perform corresponding functions.

[0049] After the battery system 10 is powered on, the processor 20 starts to work, so that the processor 20 can control the battery management system board 111 to perform self-checking. For example, the processor 20 controls the battery management system board 111 to detect at least one of the level of the input interface 1111, the voltage detection of the battery module 11, the current detection of the battery module 11, the temperature detection of the battery module 11, the capacity detection of the battery module 11, and the health state detection of the battery module 11. In one embodiment, the processor 20 controls the battery management system board 111 to detect the level of the input interface 1111, the voltage detection of the battery module 11, the current detection of the battery module 11, the temperature detection of the battery module 11, the capacity detection of the battery module 11, and the health state detection of the battery module 11. It can be understood that the self-checking is not limited to detecting the level of the input interface 1111, the voltage detection of the battery module 11, the current detection of the battery module 11, the temperature detection of the battery module 11, the capacity detection of the battery module 11, and the health state detection of the battery module 11.

[0050] Referring to FIG. 3, in some embodiments, the battery management system board 111 includes a first resistor 1113, and the input interface 1111 is connected to the ground through the first resistor 1113.

[0051] In this way, by connecting the input interface 1111 of the battery management system board 111 to the ground through the first resistor 1113, the input interface 1111 can be designed as a fixed low-level circuit when there is no signal input.

[0052] Specifically, after the battery module 11 is installed in the energy storage power supply 100, the input interface 1111 included in the battery management system board 111 is connected to the ground through the first resistor 1113, so that the input interface 1111 can be pulled down to a ground network in the battery management system board 111. When no identification signal is transmitted to the battery management system board 111, the level at the input interface 1111 can be a fixed low level (such as 0V), and when the identification signal is transmitted to the input interface 1111, the low level can change, and then the master module 112 and the slave module 113 can be determined according to the changed input interface 1111.

[0053] Referring to FIG. 3 and FIG. 5, in some embodiments, the battery management system board 111 comprises a signal conversion circuit 114 and a communication line 115, the communication line 115 is electrically connected to the input interface 1111 through the signal conversion circuit 114, and the level of the input interface 1111 is collected through the communication line 115.

[0054] In this way, by connecting the communication line 115 and the input interface 1111 through the signal conversion circuit 114, the communication line 115 can collect the level of the input interface 1111, so that the level of the input interface 1111 collected by the communication line 115 can be converted, the level of the input interface 1111 is changed, and then the master module 112 and the slave module 113 can be determined according to the changed level.

[0055] Specifically, the battery management system board 111 comprises the signal conversion circuit 114 and the communication line 115. The signal conversion circuit 114 can be used to convert low level to high level, and the signal conversion circuit 114 can be arranged between the communication line 115 and the input interface 1111, so that the identification signal on the communication line 115 enters the input interface 1111 after passing through the signal conversion circuit 114.

[0056] The communication line 115 can be used to connect various components in the energy storage power supply 100 and to transmit various signals and instructions, and the communication line 115 comprises an identification signal line, a CAN communication line 115, an addressing line, etc. so that the level of the input interface 1111 is collected through the communication line 115 and transmitted to the processor 20.

[0057] Referring to FIG. 5, in some embodiments, the battery management system board 111 comprises a second resistor 1114 and a third resistor 1115, one end of the second resistor 1114 is connected to the output interface 1112 and the signal conversion circuit 114, and the other end is connected to the ground, and one end of the third resistor 1115 is connected to the input interface 1111 and the signal conversion circuit 114, and the other end is connected to the ground.

[0058] In this way, by arranging the second resistor 1114 and the third resistor 1115, the level of the input interface 1111 can be controlled, so as to distinguish the master module 112 and the slave module 113.

[0059] Specifically, the battery management system board 111 comprises the second resistor 1114 and the third resistor 1115, one end of the second resistor 1114 is connected to the output interface 1112 and the signal conversion circuit 114, and the other end is connected to the ground, so that a fixed low level signal (such as 0V) can be detected by the signal conversion circuit 114 when there is no input signal in the output interface 1112; when there is an input signal in the output interface 1112, the input signal is divided, and then the divided input signal is transmitted to the signal conversion circuit 114.

[0060] One end of the third resistor 1115 is connected to the output interface and the signal conversion circuit 114, and the other end is connected to the ground. The third resistor 1115 is used to provide a fixed voltage level to the processor 20 of the battery management system board 111 when there is no input signal to the signal conversion circuit 114, and to divide the input signal and transmit the input signal to the processor 20 when there is an input signal.

[0061] Referring to FIG. 3, in some embodiments, the battery management system board 111 includes a fourth resistor 1116, and the output interface 1112 is connected to the power supply end through the fourth resistor 1116.

[0062] In this way, by connecting the output interface 1112 to the power supply end through the fourth resistor 1116, the output interface 1112 can be designed as a fixed high-level circuit when there is no input signal.

[0063] Specifically, after the battery module 11 is installed in the energy storage power supply 100, the output interface 1112 included in the battery management system board 111 is connected to the power supply end through the fourth resistor 1116, so that the output interface 1112 can be pulled up to a high level by the power supply in the battery management system board 111, and when there is no identification signal transmitted to the battery management system board 111, the level at the output interface 1112 can be a fixed high level (such as 3.3V, 5V, or 12V, etc.).

[0064] Referring to FIG. 3, in some embodiments, the output interface 1112 of the master module 112 is connected to the input interface 1111 of the slave module 113 through the communication line 115.

[0065] In this way, the output interface 1112 of the master module 112 is connected to the input interface 1111 of the slave module 113 through the communication line 115, so that the master module 112 can transmit the input signal to the slave module 113 to identify and address the slave module 113.

[0066] Specifically, the output interface 1112 of the master module 112 can be connected to the input interface 1111 of one of the slave modules 113 in the battery system 10 through the communication line 115, so that the master module 112 can transmit the address signal to the slave module 113. And between the adjacent two slave modules 113, the output interface 1112 of one of the slave modules 113 can be connected to the input interface 1111 of the other slave module 113 through the communication line 115, so that the address signal can be transmitted between the adjacent two slave modules 113.

[0067] Thus, by connecting the output interface 1112 of the master module 112 to one of the input interfaces 1111 of the slave modules 113, the input signal can be transmitted to the slave module 113, so that the first slave module 113 can be determined and addressed. Then, the output interface 1112 of the first slave module 113 is connected to the input interface 1111 of another slave module 113, so that the input signal can be transmitted to the another slave module 113, so that the second slave module 113 can be determined and addressed.

[0068] Referring to FIG. 6, in some embodiments, the identification method comprises:

[0069] Step 015: Addressing the master module 112 and the slave modules 113 according to the order of the identified master module 112 and the slave modules 113.

[0070] Thus, by addressing the master module 112 and the slave modules 113 according to the order of the identified master module 112 and the slave modules 113, the instruction length can be shortened, the programming flexibility can be improved, the control logic can be simplified, the pipeline operation can be supported, the debugging and maintenance can be facilitated, and the scalability is good.

[0071] Specifically, after the battery management system board 111 of the battery system 10 is powered on, the processor 20 of all the battery management system boards 111 actively detects the level of the master-slave identification signal of the input interface 1111. When the processor 20 detects that the input interface 1111 is at a low level, this battery management system board 111 can automatically identify as the master module 112; when the processor 20 detects that the input interface 1111 is at a high level, this battery management system board 111 can automatically identify as the slave module 113.

[0072] The battery management system board 111 identified as the master module 112 can send an addressing signal to the next slave module 113 through the addressing line to address the slave module 113. The slave module 113 receiving the addressing signal obtains the addressing information of the slave modules 113 of the entire battery system 10 from the master module 112 through the communication line 115. If the number of the slave modules 113 of the entire battery system 10 is 0, the slave module 113 is automatically addressed as slave module 1, and other slave modules 113 not receiving the addressing signal are on standby.

[0073] After the addressing of the slave module 1 is completed, the master module 112 is informed through the communication line 115 that the addressing is completed. The master module 112 defines the number of the slave modules 113 as 1. Then, the slave module 1 sends an addressing signal to the next slave module 113. The slave module 113 receiving the addressing signal obtains the addressing information of the slave modules 113 of the entire battery system 10 from the master module 112 through the communication line 115. If the number of the slave modules 113 of the entire battery system 10 is 1, the slave module 113 is automatically addressed as slave module 2; other slave modules 113 not receiving the addressing signal are on standby.

[0074] In this way, until the last slave module N is addressed, the address completion instruction is sent to the master module 112 through the communication line 115. After the master module 112 receives the address completion instruction of the slave module N, the number of the slave module 113 is defined as N, and then no address completion instruction of the slave module 113 is received, the number of the slave module 113 of the entire battery system 10 is finally N.

[0075] Please refer to Fig. 1 again, the battery system 10 of the embodiment of the application comprises a processor 20, a memory 30 and a computer program, wherein the computer program is stored in the memory 30 and executed by the processor 20, and the computer program comprises instructions for executing the identification method of any of the above-mentioned embodiments, which will not be described herein again for the sake of brevity.

[0076] Please refer to Fig. 1 again, the energy storage power supply 100 of the embodiment of the application comprises an inverter 40 and the battery system 10 of any of the above-mentioned embodiments, and the inverter 40 is electrically connected to the battery system 10.

[0077] Specifically, the energy storage power supply 100 comprises the inverter 40 and the battery system 10. The inverter 40 can be a converter capable of converting direct current and fixed frequency and fixed voltage or adjustable frequency and adjustable voltage alternating current to each other, for example, the inverter 40 can convert direct current (such as batteries, storage batteries, etc.) into alternating current, or convert alternating current into direct current, or convert low voltage into high voltage, or convert high voltage into low voltage. The battery pack can store a large amount of electric energy and can efficiently deliver the stored electric energy to other electric devices.

[0078] Please refer to Fig. 7, the embodiment of the application further provides a non-volatile computer readable storage medium 300 comprising a computer program 310, and the computer program 310 is executed by a processor 320 to make the processor 320 execute the identification method of any of the above-mentioned embodiments, which will not be described herein again for the sake of brevity.

[0079] In the description of the present specification, the description of the terms "certain embodiments", "in one example", "exemplarily" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above-mentioned terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0080] Any processes or methods described in the flow charts or otherwise described herein can be understood as representing code modules, segments, or portions of code which include one or more executable instructions for implementing specific logic functions (or steps) of the process, and / or that the various processes described herein can be understood as representing executable instructions, code segments, or portions of code which include one or more steps for implementing the functions (or steps) of the processes, and that the various processes described herein can be implemented with or without the use of hardware, software, firmware, or any combination thereof.

[0081] Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above-described embodiments are exemplary only, and that changes, modifications, substitutions and variations can be made therein without departing from the scope of the present application.

Claims

1. A method of identification for a battery system, the battery system comprising a plurality of battery modules, each battery module comprising a battery management system board, the battery management system board comprising an input interface, characterized in that, The identification method comprises: obtaining the level of the input interface of the battery management system board; in the case that the level of the input interface is a first level, confirming that the battery module corresponding to the battery management system board is a master module; in the case that the level of the input interface is a second level different from the first level, confirming that the battery module corresponding to the battery management system board is a slave module.

2. The identification method according to claim 1, characterized in that, The first level is one of a low level and a high level, and the second level is the other of the low level and the high level.

3. The identification method according to claim 1 or 2, characterized in that, Before the step of obtaining the level of the input interface of the battery management system board, the identification method comprises: controlling the battery system to be powered on, and causing the battery management system board to perform self-checking.

4. The identification method according to claim 3, characterized in that, Causing the battery management system board to perform self-checking comprises: controlling the battery management system board to detect the level of the input interface, and to detect at least one of the voltage, the current, the temperature, the capacity and the health status of the battery module.

5. The identification method according to any one of claims 1 to 4, characterized in that, The battery management system board comprises a first resistor, and the input interface is connected to a ground through the first resistor.

6. The identification method according to claim 5, characterized in that, The battery management system board comprises a signal conversion circuit and a communication line, the communication line electrically connects the input interface through the signal conversion circuit, and the level of the input interface is collected through the communication line.

7. The identification method according to claim 6, characterized in that, The battery management system board comprises an output interface, a second resistor and a third resistor, one end of the second resistor is connected to the output interface and the signal conversion circuit, and the other end of the second resistor is connected to a ground, one end of the third resistor is connected to the input interface and the signal conversion circuit, and the other end of the third resistor is connected to the ground.

8. The identification method according to claim 7, characterized in that, The battery management system board comprises a fourth resistor, and the output interface is connected to a power supply end through the fourth resistor.

9. The identification method according to any one of claims 1 to 8, characterized in that, The output interface of the master module is connected to the input interface of a slave module through a communication line.

10. The identification method according to any one of claims 1 to 8, characterized in that, The output interface of the master module is connected to the input interface of one of the slave modules, the output interface of one of the adjacent two slave modules is connected to the input interface of the other slave module.

11. The identification method according to any one of claims 1 to 10, characterized in that, The identification method comprises: addressing the master module and the slave modules according to the order of the identified master module and the slave modules.

12. A battery system characterized by, comprises: a processor, a memory; and a computer program, wherein the computer program is stored in the memory and executed by the processor, and the computer program comprises instructions for executing the identification method of any one of claims 1 to 11.

13. The battery system of claim 12, wherein, The battery management system board comprises a first resistor, and the input interface is connected to a ground through the first resistor.

14. The battery system of claim 12 or 13, wherein, The battery management system board comprises a signal conversion circuit and a communication line, the communication line electrically connects the input interface through the signal conversion circuit, and the level of the input interface is collected through the communication line.

15. The battery system of claim 14, wherein, The battery management system board comprises an output interface, a second resistor and a third resistor, one end of the second resistor is connected to the output interface and the signal conversion circuit, and the other end of the second resistor is connected to a ground, one end of the third resistor is connected to the input interface and the signal conversion circuit, and the other end of the third resistor is connected to the ground.

16. The battery system of claim 15, wherein, The battery management system board comprises a fourth resistor, and the output interface is connected to a power supply end through the fourth resistor.

17. The battery system of any one of claims 12-16, wherein, The output interface of the master module is connected to the input interface of the slave module through a communication line.

18. The battery system of any one of claims 12-16, wherein, The output interface of the master module is connected to the input interface of one of the slave modules, and the output interface of one of the adjacent two slave modules is connected to the input interface of the other slave module.

19. An energy storage power supply, characterized by, The battery system of any one of claims 12-18, further comprising an inverter electrically connected to the battery system.

20. A non-transitory computer readable storage medium embodying a computer program, wherein, The computer program, when executed by a processor, causes the processor to perform the identification method of any one of claims 1-11.

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