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

Abstract

The invention discloses an identification method, a battery system, an energy storage power supply and a storage medium. The identification method is applied to the battery system, the battery system comprises a plurality of battery modules, each battery module comprises a battery management system board, and the battery management system board comprises an input interface. The identification method comprises the following steps: acquiring the level of an input interface of the battery management system board; when the level of the input interface is a low level, determining that the module corresponding to the battery management system board is a main module; and under the condition that the level of the input interface is a high level, determining that the module corresponding to the battery management system board is a slave module. By acquiring the level of the input interface of the battery management system board, whether the battery module is the master module or the slave module can be distinguished, the battery management system boards with different material numbers do not need to be arranged for each battery module, confusion during installation is avoided, the version management cost of the battery system is reduced, and the installation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage power supplies, and more specifically, to an identification method, a battery system, an energy storage power supply, and a non-volatile computer-readable storage medium. Background Art

[0002] In the energy storage power supply of the related art, 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 charge and discharge the slave module.

[0003] However, the material numbers of the battery management system board installed on the main module and the battery management system board installed on the slave module are inconsistent. When installing the battery management system board of the main module and the battery management system board of the slave module, it is easy to cause installation confusion, resulting in the battery system being unable to distinguish between the main module and the slave module, reducing installation efficiency. Summary of the invention

[0004] Embodiments of the present application provide an identification method, a battery system, an energy storage power supply, and a non-volatile computer-readable storage medium.

[0005] The identification method of the embodiment of the present application is used for a battery system, the battery system includes a plurality of battery modules, each battery module includes a battery management system board, and the battery management system board includes an input interface. The identification method includes obtaining the level of the input interface of the battery management system board; when the level of the input interface is low, confirming that the module corresponding to the battery management system board is a master module; when the level of the input interface is high, confirming that the module corresponding to the battery management system board is a slave module.

[0006] In this way, by obtaining the level of the input interface of the battery management system board, it is possible to distinguish whether the battery module is a master module or a slave module. There is no need to set a battery management system board with a different material number for each battery module, so as to avoid confusion during installation, thereby reducing the version management cost of the battery system and improving installation efficiency.

[0007] In certain embodiments, before the step of acquiring the level of the input interface of the battery management system board, the identification method includes controlling the battery system to power on and causing the battery management system board to perform a self-test.

[0008] In this way, by controlling the battery system to connect to the power supply, the power supply can supply power to the battery management system board to start the battery management system, so that the battery module can be detected to identify the master module and the slave module.

[0009] In some embodiments, the battery management system board includes a first resistor, and the input interface is connected to the ground terminal through the first resistor.

[0010] In this way, by connecting the input interface of the battery management system board to the ground terminal through the first resistor, the input interface can be designed as a fixed low-level circuit when there is no signal input.

[0011] In some embodiments, the battery management system board includes a signal conversion circuit and a communication line, the communication line is electrically connected to the input interface through the signal conversion circuit, and the level of the input interface is collected through the communication line.

[0012] In this way, by using a signal conversion circuit to connect the communication line and the input interface, the communication line can collect the level of the input interface, so that the level of the input interface collected by the communication line can be converted, so that the level of the input interface changes, and then the master module and the slave module can be determined according to the changed level.

[0013] In some embodiments, the battery management system board includes 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 is connected to the ground, one end of the third resistor is connected to the input interface and the signal conversion circuit, and the other end is connected to the ground.

[0014] In this way, by setting the second resistor and the third resistor, the level of the input interface can be controlled, thereby distinguishing between the master module and the slave module.

[0015] In some embodiments, the battery management system board includes an output interface and a third resistor, and the output interface is connected to a power supply terminal through the third resistor.

[0016] In this way, by connecting the output interface to the power supply terminal via the third resistor, the output interface can be designed as a fixed high-level circuit when there is no signal input.

[0017] In some embodiments, the output interface of the master module is connected to the input interface of the slave module via a communication line.

[0018] In this way, the output interface of the master module is connected to the input interface of the slave module through a communication line, so that the master module can transmit the input signal to the slave module, identify and address the slave module.

[0019] In some embodiments, the output interface of the master module is connected to the input interface of one of the slave modules, and among two adjacent slave modules, the output interface of one of the slave modules is connected to the input interface of the other slave module.

[0020] In this way, by connecting the output interface of the master module to the input interface of one of the slave modules, the input signal can be transmitted to the slave module, so that the first slave module can be determined and addressed. Then, the output interface of the first slave module is connected to the input interface of another slave module, so that the input signal can be transmitted to the other slave module, so that the second slave module can be determined and addressed.

[0021] In some embodiments, the identification method includes addressing the master module and the slave module according to the identified order of the master module and the slave module.

[0022] In this way, by addressing the master module and the slave module in the order of the identified master module and the slave module, the instruction length can be shortened, the programming flexibility can be improved, the control logic can be simplified, pipeline operation can be supported, debugging and maintenance can be facilitated, and the scalability can be good.

[0023] The battery system of an embodiment of the present application includes 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 includes instructions for executing any one of the identification methods described above.

[0024] The energy storage power supply of the embodiment of the present application includes an inverter and the battery system described above, and the inverter is electrically connected to the battery system.

[0025] The non-volatile computer-readable storage medium of the embodiment of the present application contains a computer program, and when the computer program is executed by a processor, the processor executes any one of the above-mentioned identification methods.

[0026] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 It is a schematic diagram of the structure of an energy storage power supply in some embodiments of the present application;

[0029] Figure 2 is a schematic flow chart of an identification method of certain embodiments of the present application;

[0030] Figure 3 is a schematic diagram of the structure of a battery system of certain embodiments of the present application;

[0031] Figure 4is a schematic flow chart of an identification method of certain embodiments of the present application;

[0032] Figure 5 is a schematic diagram of the structure of a battery system of certain embodiments of the present application;

[0033] Figure 6 is a schematic flow chart of an identification method of certain embodiments of the present application;

[0034] Figure 7 It is a schematic diagram of the connection status of a non-volatile computer-readable storage medium and a processor in certain embodiments of the present application.

[0035] Description of Figure Numbers:

[0036] 100. Energy storage power source; 10. Battery system; 11. Battery module; 111. Battery management system board; 1111. Input interface; 1112. Output interface; 1113. First resistor; 1114. Second resistor; 1115. Third resistor; 1116. Fourth resistor; 112. Main module; 113. Slave module; 114. Signal conversion circuit; 115. Communication line; 20. Processor; 30. Memory; 40. Inverter. DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0038] See also Figure 1 , Figure 2 and Figure 3 The identification method of the embodiment of the present application is used for a battery system 10, the battery system 10 includes a plurality of battery modules 11, each battery module 11 includes a battery management system board 111, and the battery management system board 111 includes an input interface 1111. The identification method includes:

[0039] Step 011: Obtaining the level of the input interface 1111 of the battery management system board 111;

[0040] Step 012: when the level of the input interface 1111 is low, confirm that the module corresponding to the battery management system board 111 is the main module 112;

[0041] Step 013 : when the level of the input interface 1111 is high, confirm that the module corresponding to the battery management system board 111 is the slave module 113 .

[0042] In this way, by obtaining the level of the input interface 1111 of the battery management system board 111, it is possible to distinguish whether the battery module 11 is the main module 112 or the slave module 113. There is no need to set a battery management system board 111 with a different material number for each battery module 11, so as to avoid confusion during installation, thereby reducing the version management cost of the battery system 10 and improving installation efficiency.

[0043] The energy storage power supply 100 is a device that can store electric energy, and it can be used as a mobile power supply. The energy storage power supply 100 includes a battery system 10, which can be used to control the charging and discharging process of the energy storage power supply 100, control the temperature of the energy storage power supply 100, prevent damage to the energy storage power supply 100 due to overheating or overcooling, control the protection measures of abnormal conditions such as overvoltage, undervoltage, overcurrent and short circuit of the energy storage power supply 100, and monitor the status and performance of the energy storage power supply 100 in real time.

[0044] The battery system 10 includes a plurality of battery modules 11, which can store and release electric energy, and each battery module 11 includes a battery management system board 111, on which a battery management system (BMS) is provided, which can be used to monitor and manage the charging and discharging process of the battery module 11, and ensure the safety and stable performance of the battery module 11. In addition, an input interface 1111 is provided on the battery management system board 111, and the input interface 1111 can be used to receive external input signals. For example, the input interface 1111 includes a CAN (Controller Area Network, CAN) 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.

[0045] The input interface 1111 includes a high voltage detection interface for receiving a high voltage signal from a battery pack to perform voltage detection and insulation detection.

[0046] The input interface 1111 includes a MODBUS interface. MODBUS is a communication protocol used to transmit 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.

[0047] The input interface 1111 includes an RS485 interface. RS485 is a serial communication protocol suitable for transmitting data over a long distance. The battery management system board 111 can exchange data with other RS485 devices through the RS485 interface.

[0048] The input interface 1111 includes an RS232 interface, which is also a serial communication protocol, usually used for short-distance data transmission. Although RS232 is 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.

[0049] The input interface 1111 includes an Ethernet interface, and the battery management system board 111 can be connected to a local area network (LAN) or the Internet with other devices or systems through the Ethernet interface to achieve remote monitoring and data exchange.

[0050] The input interface 1111 includes Wi-Fi and Bluetooth interfaces. Some battery management system boards 111 support Wi-Fi and Bluetooth wireless communication protocols to facilitate data exchange and remote monitoring with other wireless devices.

[0051] The energy storage power supply 100 includes a processor 20 and a memory 30. The processor 20 may be a microcontroller unit, the memory 30 may store a computer program 31 including instructions for executing the identification method, and the processor 20 may execute the computer program 31 including instructions for executing the identification method.

[0052] Specifically, when multiple battery modules 11 are installed in the energy storage power supply 100, it is necessary to distinguish the battery modules 11 into a main module 112 and a slave module 113. Among them, the main module 112 is used to realize the function of the main battery module 11, and the slave module 113 realizes the function of the slave battery module 11, and there are differences in the functions realized by the two. The battery management system board 111 of the main module 112 needs to implement the logic algorithm of the entire 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 input and output power control. The battery management system board 111 of the slave module 113 is used to receive commands from the battery management system board 111 of the main module 112 to execute the charging and discharging actions of the slave module 113.

[0053] The processor 20 can obtain the level of the input interface 1111 of the battery management system board 111. For example, the processor 20 can be a microcontroller unit (MCU). When multiple battery modules 11 are installed in the energy storage power supply 100, the processor 20 will send an identification signal to the input interface 1111 of the battery module 11, and enable the processor 20 to actively detect the level at the input interface 1111 of the multiple battery modules 11. 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 main module 112, and the software on the battery management system board 111 can be determined as the main 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 a slave module 113, and the software on the battery management system board 111 can be determined as the slave module 113. Thus, the plurality of battery modules 11 can be distinguished into a master module 112 and a slave module 113 .

[0054] See also Figure 4 In some embodiments, before step 011: obtaining the level of the input interface 1111 of the battery management system board 111, the identification method includes:

[0055] Step 014: Control the battery system 10 to power on, and enable the battery management system board 111 to perform a self-check.

[0056] In this way, by controlling the battery system 10 to connect to the power supply, the power supply can supply power to the battery management system board 111 to start the battery management system, so that the battery module 11 can be detected to identify the master module 112 and the slave module 113.

[0057] 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, the 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 operate and perform corresponding functions.

[0058] 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-test. For example, the processor 20 controls the battery management system board 111 to detect the level of the input interface 1111, as well as 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, the health status detection of the battery module 11, etc.

[0059] See also Figure 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 .

[0060] 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.

[0061] 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 terminal through the first resistor 1113, so that the input interface 1111 can be pulled down by the ground network in the battery management system board 111, and 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). Then, when the identification signal is transmitted to the input interface 1111, the low level can be changed, and then the master module 112 and the slave module 113 can be determined according to the changed input interface 1111.

[0062] See also Figure 3 and Figure 5 In some embodiments, the battery management system board 111 includes 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 .

[0063] In this way, by using the signal conversion circuit 114 to connect the communication line 115 and the input interface 1111, 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, so that the level of the input interface 1111 changes, and then the main module 112 and the slave module 113 can be determined according to the changed level.

[0064] Specifically, the battery management system board 111 includes a signal conversion circuit 114 and a communication line 115. The signal conversion circuit 114 can be used to convert a low level into a 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.

[0065] 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. The communication line 115 includes an identification signal line, a CAN communication line 115, an addressing line, etc. Thus, the level of the input interface 1111 is collected and transmitted to the processor 20 through the communication line 115.

[0066] See also Figure 5 In some embodiments, the battery management system board 111 includes 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.

[0067] In this way, by providing the second resistor 1114 and the third resistor 1115 , the level of the input interface 1111 can be controlled, thereby distinguishing the master module 112 from the slave module 113 .

[0068] Specifically, the battery management system board 111 includes 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. When there is no input signal at the output interface 1112, the signal conversion circuit 114 can detect a fixed low-level signal (such as 0V); when there is an input signal at the output interface 1112, the input signal is divided and then the divided input signal is transmitted to the signal conversion circuit 114.

[0069] One end of the third resistor 1115 is connected to the input interface and the signal conversion circuit 114, and the other end is connected to the ground. The third resistor 1115 detects a fixed level for the processor 20 of the battery management system board 111 when there is no input signal from the signal conversion circuit 114, and divides the input signal when there is an input signal, and then transmits the input signal to the processor 20.

[0070] See also Figure 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 terminal through the fourth resistor 1116 .

[0071] In this way, by connecting the output interface 1112 to the power supply terminal via the fourth resistor 1116 , the output interface 1112 can be designed as a fixed high-level circuit when there is no signal input.

[0072] 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 by the power supply 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 high level (such as 3.3V, 5V or 12V, etc.).

[0073] Please refer to 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 via a communication line 115 .

[0074] In this way, the output interface 1112 of the master module 112 is connected to the input interface 1111 of the slave module 113 via the communication line 115 , so that the master module 112 can transmit the input signal to the slave module 113 , and identify and address the slave module 113 .

[0075] 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 addressing signal to the slave module 113. And among two adjacent slave modules 113, the output interface 1112 of one slave module 113 can be connected to the input interface 1111 of the other slave module 113 through the communication line 115, so that the adjacent slave modules 113 can transmit the addressing signal.

[0076] In this way, by connecting the output interface 1112 of the master module 112 to the input interface 1111 of one 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 other slave module 113, so that the second slave module 113 can be determined and addressed.

[0077] See also Figure 6 In some embodiments, the identification method comprises:

[0078] Step 015: addressing the master module 112 and the slave module 113 according to the identified order of the master module 112 and the slave module 113 .

[0079] In this way, by addressing the master module 112 and the slave module 113 in the order of the identified master module 112 and the slave module 113, it is possible to shorten the instruction length, improve programming flexibility, simplify the control logic, support pipeline operation, facilitate debugging and maintenance, and have good scalability.

[0080] Specifically, after the battery management system board 111 of the battery system 10 is powered on, the processors 20 of all battery management system boards 111 will actively detect 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, the battery management system board 111 can be automatically identified as the master module 112; when the processor 20 detects that the input interface 1111 is at a high level, the battery management system board 111 can be automatically identified as the slave module 113.

[0081] The battery management system board 111 identified as the main module 112 can send an addressing signal to the next slave module 113 for addressing through the addressing line. The slave module 113 that receives the addressing signal obtains the addressing information of the slave modules 113 of the entire battery system 10 from the main module 112 through the communication line 115. If the number of addressed slave modules 113 of the entire battery system 10 is 0, it is automatically addressed as slave module 1, and other slave modules 113 that have not received the addressing signal are on standby.

[0082] After the slave module 1 is addressed, it notifies the master module 112 through the communication line 115 that the addressing is completed, and the master module 112 defines the number of slave modules 113 as 1. Then the slave module 1 sends an addressing signal to the next slave module 113, and the slave module 113 that receives 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 addressed slave modules 113 of the entire battery system 10 is 1, it is automatically addressed as slave module 2; other slave modules 113 that have not received the addressing signal are on standby.

[0083] This is repeated until the last slave module N is addressed and an addressing completion instruction is sent to the master module 112 via the communication line 115. After receiving the instruction that the addressing of the slave module N is completed, the master module 112 defines the number of slave modules 113 as N, and then does not receive any more addressing completion instructions for the slave modules 113. Finally, the number of slave modules 113 in the entire battery system 10 is N.

[0084] Please refer again Figure 1 The battery system 10 of the embodiment of the present application includes 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 includes instructions for executing the identification method of any of the above-mentioned embodiments, which will not be repeated here for the sake of brevity.

[0085] Please refer again Figure 1 The energy storage power supply 100 of the embodiment of the present application includes an inverter 40 and a battery system 10 of any of the above-mentioned embodiments, and the inverter 40 is electrically connected to the battery system 10.

[0086] Specifically, the energy storage power supply 100 includes an inverter 40 and a battery system 10. The inverter 40 can be a converter that can realize the mutual conversion between DC power and constant frequency and voltage or frequency and voltage modulation AC power. For example, the inverter 40 can convert DC power (such as batteries, storage bottles, etc.) into AC power, or convert AC power into DC power, or can convert low voltage into high voltage, and high voltage into low voltage. The battery pack can store a large amount of electrical energy and can efficiently transmit the stored electrical energy to other electrical equipment.

[0087] See also Figure 7 The embodiment of the present application also provides a non-volatile computer-readable storage medium 300 including a computer program 310. When the computer program 310 is executed by the processor 320, the processor 320 executes the identification method of any one of the above-mentioned embodiments. For the sake of brevity, it will not be repeated here.

[0088] In the description of this specification, the descriptions with reference to the terms "certain embodiments", "in an example", "exemplarily", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0089] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0090] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An identification method 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; When the level of the input interface is low, confirm that the battery module corresponding to the battery management system board is the main module; When the level of the input interface is a high level, it is confirmed 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: Before the step of obtaining the level of the input interface of the battery management system board, the identification method includes: The battery system is controlled to be powered on, and the battery management system board is made to perform a self-check.

3. The identification method according to claim 1, characterized in that: The battery management system board includes a first resistor, and the input interface is connected to the ground terminal through the first resistor.

4. The identification method according to claim 3, characterized in that: The battery management system board includes a signal conversion circuit and a communication line. The communication line is electrically connected to the input interface through the signal conversion circuit, and the level of the input interface is collected through the communication line.

5. The identification method according to claim 4, characterized in that: The battery management system board includes 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 is connected to the ground, one end of the third resistor is connected to the input interface and the signal conversion circuit, and the other end is connected to the ground.

6. The identification method according to claim 5, characterized in that: The battery management system board includes a fourth resistor, and the output interface is connected to the power supply terminal through the fourth resistor.

7. The identification method according to claim 1, characterized in that: The output interface of the master module is connected to the input interface of the slave module via a communication line.

8. The identification method according to claim 1, characterized in that: The output interface of the master module is connected to the input interface of one of the slave modules, and among two adjacent slave modules, the output interface of one of the slave modules is connected to the input interface of the other slave module.

9. The identification method according to claim 1, characterized in that: The identification method comprises: The master module and the slave module are addressed according to the identified order of the master module and the slave module.

10. A battery system, characterized in that: include: Processor, memory; and A computer program, wherein the computer program is stored in the memory and executed by the processor, and the computer program includes instructions for executing the identification method according to any one of claims 1 to 9.

11. An energy storage power supply, characterized in that: The invention comprises an inverter and the battery system according to claim 10, wherein the inverter is electrically connected to the battery system.

12. A non-volatile computer-readable storage medium containing a computer program, characterized in that: When the computer program is executed by a processor, the processor is caused to perform the identification method according to any one of claims 1 to 9.

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