Battery cell and data processing method thereof, battery management system and energy storage system

Abstract

This application discloses a battery cell, its data processing method, a battery management system, and an energy storage system. The method, with a data acquisition module integrated into the battery cell, assigns a communication address to the cell to generate a first communication address within the acquisition module. This first communication address, the cell's serial number, and its serial number are then fused to obtain a second communication address. The second communication address is sent to the acquisition module, enabling the battery cell data to be encoded using this address. This improves the accuracy of battery cell data acquisition while maintaining communication efficiency between the cell and the battery management module. It also reduces the data processing performance requirements of the battery management module, lowers its production costs, simplifies battery pack installation, and facilitates component replacement.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cell and its data processing method, a battery management system and an energy storage system. Background Technology

[0002] The slave control board within the battery pack is a crucial component of the Battery Management System (BMS), primarily responsible for monitoring and managing parameters such as voltage, current, and temperature of the battery pack. The slave control board is typically installed near each individual battery cell, collecting voltage and temperature information from the cells and transmitting this information to the main control board in the high-voltage box for further processing.

[0003] However, the above-mentioned data acquisition methods usually rely on wired connections to transmit the voltage and temperature data of the battery cells to the battery management system via a data acquisition harness. Although the above methods are reliable, they have problems such as high cost, heavy weight, complex installation, and low data acquisition accuracy. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides a battery cell and its data processing method, a battery management system, and an energy storage system. This improves the accuracy of battery cell data acquisition, ensures communication efficiency between the battery cell and the battery management module, reduces the difficulty of battery pack installation, and facilitates the replacement of battery pack components.

[0005] In a first aspect, this application provides a data processing method for a battery cell, which is applied to a battery management module located in a battery pack corresponding to the battery cell. The method includes:

[0006] A communication address is assigned to the battery cell to generate the first communication address of the battery cell in the battery cell's acquisition module; wherein, the acquisition module is located on the individual battery cell to form the battery cell; the battery management module and the acquisition module communicate using the first communication address;

[0007] The first communication address, the cell's serial number and serial number are fused to obtain the cell's second communication address; wherein, the serial number includes one or more of the following: the project number where the cell is located, the energy storage system number, the stack number, and the battery pack number;

[0008] Send a second communication address to the acquisition module so that the cell data acquired by the acquisition module is encoded using the second communication address.

[0009] Furthermore, in the data processing method for the battery cell provided in this application, after sending the second communication address to the acquisition module, it further includes:

[0010] The system communicates with the acquisition module based on the first communication address to obtain cell data encoded using the second communication address.

[0011] Based on the communication address of the battery management module, the cell data is sent to the main control module where the battery pack is located.

[0012] Furthermore, in the data processing method for the battery cell provided in this application, after sending the second communication address to the acquisition module, it further includes:

[0013] Send an address reset signal to the acquisition module to generate a first address corresponding to the first communication address in the acquisition module;

[0014] The first address, serial number, and serial number are merged to obtain the second address corresponding to the second communication address;

[0015] Send a second address to the acquisition module so that the cell data is encoded using the second address.

[0016] Secondly, this application also provides a data processing method for a battery cell, which is applied in a data acquisition module of the battery cell; the data acquisition module is located on a single battery cell to form a battery cell, and the method includes:

[0017] Based on the address allocation instructions of the battery management module, the first communication address of the battery cell is generated and stored in the storage module of the acquisition module;

[0018] Send the first communication address and the serial number of the battery cell to the battery management module in the battery pack where the battery cell is located, so as to generate the second communication address of the battery cell in the battery management module;

[0019] Obtain the second communication address and store it in the storage module.

[0020] Furthermore, in the data processing method for the battery cell provided in this application, after storing the second communication address in the storage module, it further includes:

[0021] The cell data collected by the acquisition module is encoded according to the second communication address to obtain the encoded cell data;

[0022] The system communicates with the battery management module based on the first communication address to send coded cell data to the battery management module.

[0023] Furthermore, in the data processing method for the battery cell provided in this application, after storing the second communication address in the storage module, it further includes:

[0024] Based on the address reset instruction of the battery management module, a first address corresponding to the first communication address of the battery cell is generated, and the first address is stored in the storage module;

[0025] The first communication address and the cell serial number are sent to the battery management module so that the second address corresponding to the second communication address is generated in the battery management module.

[0026] Obtain the second address and store it in the storage module.

[0027] Thirdly, this application also provides a data processing method for a battery cell, which is applied in a main control module. The main control module is located in a battery cluster, the battery cluster including at least one battery pack, the battery pack including at least one battery cell, and the battery cell including a data acquisition module and a single battery cell. The data acquisition module is located on the single battery cell to form the battery cell. The method includes:

[0028] Send a data request command to the battery management module of at least one battery pack to obtain cell data sent by the battery management module;

[0029] Based on the communication address of the battery management module, the cell data is summarized to obtain the summarized cell data;

[0030] The aggregated cell data is sent to the central control module for analysis.

[0031] Fourthly, this application provides a battery cell comprising:

[0032] Battery cell body;

[0033] The data acquisition module is electrically connected to both ends of the battery cell body and the battery management module of the battery pack in which the battery cell is located;

[0034] The acquisition module is configured to acquire battery cell data from the battery cell body; the acquisition module is located on the battery cell body to form the battery cell.

[0035] Fifthly, this application also provides a battery management system, which includes at least one acquisition module, at least one battery management module, at least one main control module and a central control module;

[0036] The battery cell and the data acquisition module are mounted on the battery cell to form a battery cell; the data acquisition module executes the data processing method for the battery cell provided in the second aspect, or

[0037] The battery management module executes the cell data processing method provided in the first aspect, or

[0038] The main control module executes the data processing method for the battery cell provided by the third party.

[0039] Sixthly, this application also provides an energy storage system, which includes the battery cell provided in the fourth aspect, or the battery management system provided in the fifth aspect.

[0040] The data processing method for battery cells provided in this application can allocate communication addresses to the battery cell, provided that the battery cell itself has a data acquisition module. This generates a first communication address for the battery cell in the data acquisition module, and the first communication address, the battery cell's serial number, and the serial number can be fused to obtain a second communication address for the battery cell. The second communication address is then sent to the data acquisition module so that the battery cell data is encoded using the second communication address. This improves the accuracy of battery cell data acquisition, ensures the communication efficiency between the battery cell and the battery management module, reduces the data processing performance requirements of the battery management module, reduces the production cost of the battery management module, simplifies the installation of the battery pack, and facilitates the replacement of battery pack components. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the battery cell structure provided in an embodiment of this application;

[0043] Figure 2 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0044] Figure 3 This is a schematic diagram of the structure of the battery cluster provided in an embodiment of this application;

[0045] Figure 4 This is a first flowchart illustrating the data processing method for battery cells provided in an embodiment of this application;

[0046] Figure 5 This is a second flowchart illustrating the data processing method for battery cells provided in an embodiment of this application.

[0047] Figure 6 This is a schematic diagram of the third process of the data processing method for battery cells provided in an embodiment of this application.

[0048] Figure label:

[0049] 10. Battery pack; 100. Battery cell; 110. Battery cell body; 120. Data acquisition module; 121. First module; 122. Second module; 123. Storage module; 130. Temperature sensor; 200. Battery management module; 20. High voltage box. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0052] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0053] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0054] Furthermore, in this application, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific implementation.

[0055] In related technologies, a battery pack includes multiple cells connected in series and a battery management module. The battery management module can be understood as a slave control board, i.e., a battery management unit (BMU), which can collect voltage, current, and temperature data for each cell. Each cell needs to be connected to the slave control board using relatively long acquisition cables. This not only results in numerous acquisition cables within the battery pack, increasing cable costs, but also hinders the improvement of the battery pack's energy density and increases installation time costs. Furthermore, the length and varying lengths of the acquisition cables can affect the accuracy of cell data acquisition.

[0056] Meanwhile, when collecting data, the first cell is usually used as a reference, and data is collected from each cell incrementally. This causes the accuracy of the collected data for each cell to gradually decrease, which in turn affects the subsequent balancing strategy and also leads to a decrease in the consistency of the cells.

[0057] In addition, since the battery cells are directly connected to the battery management module via the acquisition line, the acquisition line at the end of the battery cell will be subjected to a high potential, which is prone to insulation abnormalities. Moreover, the external interfaces of battery management modules from different manufacturers are different. Each time a different battery management module is used, the acquisition line needs to be redesigned, resulting in poor versatility of the battery pack.

[0058] To address this, this application provides a battery cell, its data processing method, a battery management system, and an energy storage system. The battery cell includes a cell body and a data acquisition module. The data acquisition module is electrically connected to the battery management module of the battery pack containing the cell. The data acquisition module is configured to acquire data from the cell body and is located on the cell body to form a cell. Specifically, it can be externally mounted on the cell body to form a cell, thus ensuring that the length of the acquisition wiring harness for each cell within the battery pack is consistent. Compared to traditional acquisition methods, this method uses shorter wiring harnesses and avoids the technical problem of poor acquisition accuracy due to excessively long wiring harnesses. Furthermore, since the acquisition module is mounted on the cell body, it facilitates subsequent installation of the battery pack and makes it easier to replace battery pack components. Additionally, it solves the insulation abnormality problem caused by the acquisition wiring, and the battery management module can use a universal module, avoiding the need to connect a large number of acquisition wires to the battery management module, reducing the difficulty of replacing the battery management module in the field, reducing the structural size of the battery management module, and avoiding the problem of inconsistent battery management module interfaces. It also increases the energy density of the battery pack while maintaining the same battery cell size.

[0059] Embodiments of this application provide a battery cell and its data processing method, a battery management system, and an energy storage system.

[0060] To facilitate understanding, we will first introduce the battery cell, battery pack, battery cluster, and energy storage system, and then explain in detail the data processing methods for the battery cell based on the information provided on the battery cell, battery pack, battery cluster, and energy storage system.

[0061] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of the battery cell 100 provided in an embodiment of this application. Figure 1 As shown,

[0062] This application provides a battery cell 100, which includes:

[0063] Battery cell body 110;

[0064] The data acquisition module 120 is electrically connected to both ends (positive terminal B+ and negative terminal B-) of the cell body 110 and the battery management module 200 of the battery pack 10 where the cell 100 is located.

[0065] The acquisition module 120 is configured to acquire data of the battery cell 100 from the battery cell body 110; the acquisition module 120 is located on the battery cell body 110 to form the battery cell 100.

[0066] In this embodiment, the acquisition module 120 can exist in the form of a PCB (Printed Circuit Board) and be disposed on the cell body 110 to assemble into a separate cell 100. This allows the cell 100 to have data acquisition capabilities. After the cell 100 acquires voltage, current, and temperature data, it can directly send the data to the battery management module 200 in the battery pack 10. The battery management module 200 then summarizes and packages the data before sending it to the main control board in the high-voltage box 20. The main control board then summarizes and packages the data again before sending it to the main control board for analysis.

[0067] Specifically, each cell 100 in the battery pack 10 can be formed by a cell body 110 and a data acquisition module 120. After each cell 100 is connected in series and parallel, the power supply and communication terminals of the data acquisition modules 120 of each cell 100 can be electrically connected to the battery management module 200 after being connected in parallel. At the same time, the control terminals of the data acquisition modules 120 of each cell 100 can be electrically connected to the battery management module 200 after being connected in series, so as to realize the control and communication of the data acquisition modules 120 of each cell 100 by the battery management module 200.

[0068] Meanwhile, since the acquisition module 120 is part of the battery cell 100, there is no acquisition wiring harness between each battery cell 100 and the battery management module 200; only communication wiring harnesses, power supply wiring harnesses, and control wiring harnesses exist. One end of the communication wiring harness and the power supply wiring harness of each battery cell 100 are electrically connected to their respective acquisition modules 120, and the other end of the communication wiring harness of each battery cell 100 can be connected to the battery management module 200. Similarly, the other end of the power supply wiring harness of each battery cell 100 can be connected to the battery management module 200. After the acquisition modules 120 of each battery cell 100 are connected via control wiring harnesses, one acquisition module 120 of one battery cell 100 can be connected to the battery management module 200 to achieve synchronized control of each battery cell 100. Furthermore, the acquisition modules of each battery cell within the battery pack are not interconnected, eliminating the problems of insulation abnormalities and overvoltage of the acquisition chips.

[0069] The battery cell 100 provided in this application includes a battery cell body 110 and a data acquisition module 120. The data acquisition module 120 is electrically connected to the battery management module 200 of the battery pack 10 where the battery cell 100 is located. The data acquisition module 120 is configured to acquire data from the battery cell body 110 and is located on the battery cell body 110 to form the battery cell 100. This ensures that the length of the data acquisition harness of each battery cell 100 in the battery pack 10 is consistent. Compared with the traditional data acquisition method, the harness used is shorter and there is no technical problem of poor data acquisition accuracy due to excessively long data acquisition harness. At the same time, since the data acquisition module 120 is installed on the battery cell body 110, it is easier to install the battery pack 10 in the future and it is also convenient to replace the components of the battery pack 10 in the future. In addition, it can also solve the insulation abnormality problem caused by the acquisition line, and the battery management module 200 can also use a general module, avoiding the problem of needing to connect a large number of acquisition lines to the battery management module 200, reducing the difficulty of replacing the battery management module 200 on site, reducing the structural size of the battery management module 200, reducing the production cost of the battery management module 200, and avoiding the problem of inconsistent interfaces of the battery management module 200. At the same time, it can increase the energy density of the battery pack 10 without changing the size of the battery pack 10.

[0070] In some embodiments, such as Figure 1 As shown, the battery cell 100 also includes a temperature sensor 130; wherein, the acquisition module 120 is provided with a first terminal N+ and a second terminal N-, the first terminal N+ and the second terminal N- are electrically connected to the two ends of the temperature sensor 130 respectively, and the temperature sensor 130 is configured to acquire the temperature of the battery cell body 110.

[0071] In this embodiment, the battery cell 100 is also provided with a temperature sensor 130. The temperature sensor 130 can be located at the battery cell body 110. At the same time, the two ends of the acquisition module 120 are electrically connected to the temperature sensor 130 to obtain the temperature data collected by the temperature sensor 130 on the battery cell body 110.

[0072] The temperature sensor 130 can be a droplet-shaped thermistor, or other types of thermistors, or an infrared temperature sensor 130, etc. The temperature sensor 130 can be selected according to the actual application, and this application does not make specific limitations.

[0073] In some embodiments, such as Figure 1 As shown, the acquisition module 120 includes a first module 121; the first module 121 is configured to acquire voltage data and temperature data of the battery cell body 110.

[0074] In this embodiment, the acquisition module 120 integrates a first module 121. The first module 121 is electrically connected to both ends (positive and negative terminals) of the battery cell body 110, and also electrically connected to a temperature sensor 130, thereby acquiring voltage and temperature data of the battery cell body 110. The temperature sensor 130 can be integrated into the acquisition module 120, or it can be connected to the acquisition module 120 via a data acquisition harness and located on the battery cell body 110. The location of the temperature sensor 130 can be selected according to the actual application, and this application does not impose specific limitations.

[0075] In some embodiments, the first module 121 is further configured to perform equalization on the cell body 110.

[0076] In this embodiment, the first module 121 also has the function of balancing the cell body 110. When the battery management system where the cell 100 is located detects that a certain cell 100 needs to be balanced, it can communicate with the first module 121 in the acquisition module 120 where the cell 100 is located, and use the first module 121 to balance the cell 100, so as to achieve the consistency of each cell 100 in the energy storage system.

[0077] In some embodiments, such as Figure 1 As shown, the acquisition module 120 also includes a second module 122; wherein the second module 122 is integrated with the first module 121 to form the acquisition module 120, and the second module 122 is configured to form at least one of the power supply terminal, communication terminal and control terminal of the acquisition module 120.

[0078] In this embodiment, the second module 122 can be integrated with the first module 121 on a PCB board to form a data acquisition module 120. The first module 121 and the second module 122 are electrically connected. The second module 122 can be equipped with at least one of a power supply terminal, a communication terminal, and a control terminal, thereby enabling the battery management module 200 to communicate, supply power, and control the data acquisition modules 120 of each cell 100 within the battery pack 10. The power supply terminal can include a 24+ power supply terminal and a 24- power supply terminal; the control terminal can include a DO control terminal and a DI control terminal; and the communication terminal can include a CANL communication terminal and a CANH communication terminal.

[0079] In some embodiments, such as Figure 1 As shown, the acquisition module 120 also includes a storage module 123; wherein, the storage module 123 is electrically connected to the first module 121 and the second module 122 respectively, and the storage module 123, the first module 121 and the second module 122 are integrated to form the acquisition module 120.

[0080] In this embodiment, each battery cell 100's acquisition module 120 may also include a storage module 123, i.e., a memory. The storage module 123 is electrically connected to the first module 121 and the second module 122, respectively. The first module 121, the second module 122, and the storage module 123 can be integrated on a PCB board to form the acquisition module 120. Simultaneously, the storage module 123 can store the battery cell 100 data acquired by the acquisition module 120, and can also store the communication address of the battery cell 100, so that individual battery cells 100 can be traced later.

[0081] In addition, the acquisition module of each cell in the battery pack adopts a communication and power supply isolation circuit design, which can further improve the insulation performance and reliability. This can protect the acquisition module from damage by external high voltage and ensure that the acquisition module is not damaged by the battery management system.

[0082] In some embodiments, the battery management module 200 is configured to communicate with the acquisition module 120 and to supply power to the acquisition module 120.

[0083] In this embodiment, the battery management module 200 can be understood as a slave control board within the battery pack 10, namely the battery management unit (BMU). In this application, it does not need to collect data from the cells 100 within the battery pack 10. The battery management module 200 can summarize the data collected by the acquisition modules 120 of each cell 100 within the battery pack 10, and then send it to the main control board of the high-voltage box 20. The main control board of the high-voltage box 20 then summarizes and packages the data again, and sends it to the central control board for data analysis.

[0084] In some embodiments, such as Figure 2 As shown, this application also provides a battery pack 10, which includes:

[0085] At least one battery cell 100 provided in this application;

[0086] Battery management module 200, and data acquisition module 120 electrically connected to battery cell 100.

[0087] In this embodiment, the battery pack 10 may include multiple battery cells 100 connected in series and parallel. After the battery cells 100 are connected in series, the control terminals of the acquisition modules 120 of each battery cell 100 are sequentially electrically connected, and can then be electrically connected to the battery management module 200. At the same time, the communication terminals of the acquisition modules 120 of each battery cell 100 can be electrically connected to the same communication terminal of the battery management module 200, and the power supply terminals of the acquisition modules 120 of each battery cell 100 can be electrically connected to the same power supply terminal of the battery management module 200.

[0088] In some embodiments, such as Figure 3 As shown, this application also provides a battery cluster, which includes:

[0089] At least one battery pack 10 provided in this application;

[0090] The high-voltage box 20 is electrically connected to the positive and negative terminals of the battery pack 10, respectively;

[0091] The high-voltage box 20 is configured to communicate with the battery management system and to supply power to the battery management module 200.

[0092] In this embodiment, the battery cluster may include multiple battery packs 10 connected in series and parallel. After the battery packs 10 are connected in series and parallel, they can be charged and discharged externally through a high-voltage box 20. Simultaneously, the main control board inside the high-voltage box 20 can supply power to the battery management module 200 within each battery pack 10, and the high-voltage box 20 communicates with the battery management module 200 within each battery pack 10.

[0093] In some embodiments, this application provides a battery management system, which includes at least one acquisition module, at least one battery management module, at least one main control module, and a master control module. The acquisition module is disposed on a single battery cell to form a battery cell. The battery management module is disposed in the battery pack of the energy storage system and can communicate with and supply power to the acquisition module. The main control module is disposed in the high-voltage box and can communicate with and supply power to the battery management module. The master control module can be disposed in the combiner cabinet of the energy storage system and can communicate with the main control module.

[0094] In some embodiments, this application provides an energy storage system, which includes the battery cell 100 provided in this application, or the battery pack 10 provided in this application, or the battery cluster provided in this application.

[0095] It is understood that the battery cells, battery packs, battery clusters, and energy storage systems provided in the above embodiments are merely examples. The battery cells, battery packs, battery clusters, and energy storage systems described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of systems and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems. Detailed descriptions will follow.

[0096] It should be noted that the order of description in the following embodiments is not intended to limit the preferred order of the embodiments. The data processing method for the battery cell will now be described in detail. Furthermore, the data processing method for the battery cell provided in this application can be executed by the acquisition module, battery management module, and main control module in the battery management system.

[0097] Please see Figure 4 , Figure 4 This is a first flowchart illustrating the data processing method for a battery cell provided in an embodiment of this application.

[0098] In some embodiments, such as Figure 4 As shown, this application provides a data processing method for a battery cell, which is applied to a battery management module located in the battery pack corresponding to the battery cell. The method includes steps S110, S120 and S130.

[0099] S110. Assign a communication address to the battery cell to generate a first communication address for the battery cell in the battery cell's acquisition module; wherein, the acquisition module is located on the individual battery cell to form the battery cell; the battery management module and the acquisition module communicate using the first communication address;

[0100] S120. The first communication address, the cell's serial number and serial number are fused to obtain the cell's second communication address; wherein, the serial number includes one or more of the following: the project number where the cell is located, the energy storage system number, the stack number, and the battery pack number;

[0101] S130. Send the second communication address to the acquisition module so that the cell data acquired by the acquisition module is encoded using the second communication address.

[0102] In this embodiment, the battery cells are not assigned communication addresses before leaving the factory. After they are assembled into a battery pack and applied to the energy storage system, if the battery management module and the battery cell's acquisition module are powered normally, the battery management module can assign communication addresses to all acquisition modules in the battery pack to generate a first communication address in the acquisition module. At the same time, the acquisition module can store the first communication address in the acquisition module's storage module so that it can communicate with the battery management module using the first communication address in the future.

[0103] Specifically, during the process of allocating communication addresses to the cells within the battery pack, the battery management module can designate one cell as having a first communication address numbered 0001, and then increment the address sequentially to complete the address allocation for all cells in the battery pack. After generating the first communication address, each cell in the battery pack can send the first communication address and its own serial number to the battery management system. Upon receiving the first communication address and serial number sent by the cell, the battery management system can merge the first communication address, serial number, and cell number to form a second communication address. The battery management module can then send the second communication address to the acquisition module, so that when the acquisition module subsequently sends the acquired cell data to the battery management module, it can encode the data based on the second communication address. After the cell data is encoded, it can be sent by the acquisition module to the battery management module, and then by the battery management module to the main control module of the high-voltage box, and finally by the main control module to the central control module of the battery management system for analysis.

[0104] Since each cell has its own acquisition module, the data collected from each cell is in the same format, order, and time. Therefore, it can be directly parsed in the central control module and plotted into tables and graphs to facilitate accurate analysis of the data from each cell in the energy storage system.

[0105] In the process of fusing the first communication address, the cell's serial number, and its serial number, the battery management module can integrate one or more of the cell's project number, energy storage system number, stack number, and battery pack number with the first communication address and the cell's serial number. This allows the central control module to directly display the project number, energy storage system number, stack number, and battery pack number of each cell before analyzing the data, thus achieving rapid and accurate analysis of the cell data. Simultaneously, the second communication address can also serve to trace information throughout the entire lifecycle of the cell.

[0106] In some embodiments, after sending the second communication address to the acquisition module, the method further includes: communicating with the acquisition module based on the first communication address to obtain cell data encoded using the second communication address; and sending the cell data to the main control module where the battery pack is located based on the communication address of the battery management module.

[0107] In this embodiment, after the battery management system sends the second communication address to the acquisition module, the acquisition module can store the second communication address in its storage module. Simultaneously, after acquiring cell data, the acquisition module can encode the cell data using the second communication address. After the cell data encoding is complete, the acquisition module and the battery management system communicate using the first communication address. During this communication, the acquisition module sends the encoded cell data to the battery management module. Upon receiving the encoded cell data, the battery management module can communicate with the main control module based on its own communication address to send the encoded cell data to the main control module.

[0108] Before sending the coded cell data to the main control module, the battery management system can collect and package the cell data of each cell after receiving the coded cell data sent by all cells in the battery pack at the same time, and send it to the main control module in the form of a data packet.

[0109] In some embodiments, after sending the second communication address to the acquisition module, the method further includes: sending an address reset signal to the acquisition module to generate a first address corresponding to the first communication address in the acquisition module; fusing the first address, serial number, and number to obtain a second address corresponding to the second communication address; and sending the second address to the acquisition module so that the cell data is encoded using the second address.

[0110] In this embodiment, when a component in the battery pack is replaced, such as the acquisition module or battery management module of a certain cell or the cell itself, it is necessary to reassign communication addresses to all cells in the battery pack. This allows the acquisition module and the battery management module to communicate using the first address, while the acquisition module uses the second address to encode the cell data, so that the updated cell data can be accurately obtained subsequently.

[0111] Please see Figure 5 , Figure 5 This is a second flowchart illustrating the data processing method for a battery cell provided in an embodiment of this application.

[0112] In some embodiments, such as Figure 5 As shown, this application also provides a data processing method for a battery cell, which is applied in the acquisition module of the battery cell; the acquisition module is located on a single battery cell to form a battery cell, and the method includes steps S210, S220 and S230.

[0113] S210. Based on the address allocation instruction of the battery management module, generate the first communication address of the battery cell and store the first communication address in the storage module of the acquisition module;

[0114] S220. Send the first communication address and the serial number of the battery cell to the battery management module in the battery pack where the battery cell is located, so as to generate the second communication address of the battery cell in the battery management module.

[0115] S230. Obtain the second communication address and store the second communication address in the storage module.

[0116] In this embodiment, after receiving the address allocation instruction from the battery management module, the acquisition module can generate a first communication address for a cell in the battery pack, starting with number 0001, and then incrementing sequentially to complete the address allocation for all cells in the battery pack. After generating the first communication address, each cell in the battery pack can send the first communication address and its own serial number to the battery management system. After receiving the first communication address and serial number sent by the cell, the battery management system can merge the first communication address, serial number, and cell number to form a second communication address. Then, the battery management module can send the second communication address to the acquisition module so that when the acquisition module subsequently sends the acquired cell data to the battery management module, it can encode it based on the second communication address. After the cell data is encoded, it can be sent by the acquisition module to the battery management module, and then by the battery management module to the main control module of the high-voltage box, and finally by the main control module to the overall control module of the battery management system for analysis.

[0117] Once the first and second communication addresses are stored in the acquisition module, if a battery cell fails subsequently, the historical data of the battery cell can be analyzed directly through the battery cell's acquisition module after replacement, thereby playing a role in tracing information throughout the entire life cycle of the battery cell.

[0118] In some embodiments, after storing the second communication address in the storage module, the method further includes: encoding the cell data collected by the acquisition module according to the second communication address to obtain encoded cell data; and communicating with the battery management module based on the first communication address to send the encoded cell data to the battery management module.

[0119] In this embodiment, after address allocation is completed, the acquisition module of each cell in the battery pack can synchronously collect cell data from its respective cell. After the cell data collection is completed, it can be encoded according to its second communication address. After the cell data is encoded, while sending the encoded cell data to the battery management module, the encoded data can also be directly stored in the storage module of its respective acquisition module. This allows for individual data analysis of the cell later, enabling cell data tracking and faster location of problematic cells.

[0120] In some embodiments, after storing the second communication address in the storage module, the method further includes: generating a first address corresponding to the first communication address of the battery cell based on the address reset instruction of the battery management module, and storing the first address in the storage module; sending the first communication address and the serial number of the battery cell to the battery management module to generate a second address corresponding to the second communication address in the battery management module; obtaining the second address and storing the second address in the storage module.

[0121] In this embodiment, when a component in the battery pack is replaced, such as the acquisition module or battery management module of a certain cell or the cell itself, it is necessary to reassign communication addresses to all cells in the battery pack. This allows the acquisition module and the battery management module to communicate using the first address, while the acquisition module uses the second address to encode the cell data, so that the updated cell data can be accurately obtained subsequently.

[0122] Please see Figure 6 , Figure 6 This is a schematic diagram of the third process of the data processing method for battery cells provided in an embodiment of this application.

[0123] In some embodiments, such as Figure 5 As shown, this application also provides a data processing method for a battery cell, which is applied in a main control module. The main control module is located in a battery cluster. The battery cluster includes at least one battery pack, and the battery pack includes at least one battery cell. The battery cell includes a data acquisition module and a single battery cell. The data acquisition module is located on the single battery cell to form a battery cell. The method includes steps S310, S320 and S330.

[0124] S310. Send a data request command to the battery management module of at least one battery pack to obtain cell data sent by the battery management module.

[0125] S320: Based on the communication address of the battery management module, the cell data is summarized to obtain the summarized cell data;

[0126] S330. The summarized cell data is sent to the central control module for analysis.

[0127] In this embodiment, the main control module can send a data request command to the battery management module of each battery pack within the battery cluster. After summarizing and packaging the cell data within their respective battery packs, the battery management module of each battery pack can send the summarized and packaged cell data to the main control module according to the request command. After receiving the cell data sent by all battery packs within the battery cluster, the main control module can summarize and package the cell data again and send it to the central control module in the form of data packets. The central control module can parse the cell data sent by the main control module of each battery cluster in the energy storage system. Since each data packet has the same format, order, and time, the central control module can plot the parsed cell data into tables and graphs to achieve a more comprehensive analysis of the cell data in the energy storage system.

[0128] The data processing method for battery cells provided in this application can allocate communication addresses to the battery cells, provided that the battery cells themselves have a data acquisition module. This generates a first communication address for the battery cells in the data acquisition module, and the first communication address, the serial number, and the serial number of the battery cells can be fused to obtain a second communication address for the battery cells. The second communication address is then sent to the data acquisition module so that the battery cell data is encoded using the second communication address. This improves the accuracy of battery cell data acquisition, ensures the communication efficiency between the battery cells and the battery management module, reduces the difficulty of battery pack installation, and facilitates the replacement of battery pack components.

[0129] In addition, this application sets up a data acquisition module for each battery cell to achieve higher frequency sampling. It also unifies the communication interface and communication protocol of the data acquisition module for each battery cell, which reduces the number of interfaces required by the battery management module, lowers the performance requirements of the battery management module, allows the use of a smaller battery management module, improves the energy density of the battery pack, and the battery management module only performs coarse data processing, reducing the data processing performance requirements of the battery management module and lowering the production cost of the battery management module.

[0130] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A data processing method of a battery cell, characterized by, The method, applied to a battery management module located in a battery pack corresponding to the battery cell, includes: A communication address is assigned to the battery cell to generate a first communication address for the battery cell in the battery cell's acquisition module; wherein, the acquisition module is located on a single battery cell to form the battery cell; the battery management module and the acquisition module communicate using the first communication address; The first communication address, the serial number and the serial number of the battery cell are fused to obtain the second communication address of the battery cell; wherein, the serial number includes one or more of the following: the project number, the energy storage system number, the stack number, and the battery pack number; Send the second communication address to the acquisition module so that the cell data acquired by the acquisition module is encoded using the second communication address; The method further includes, after sending the second communication address to the acquisition module: The acquisition module communicates with the first communication address to obtain cell data encoded using the second communication address. Based on the communication address of the battery management module, the cell data is sent to the main control module where the battery pack is located; the acquisition module is used to store the second communication address in the storage module of the acquisition module, and after acquiring the cell data, the cell data is encoded using the second communication address.

2. The data processing method of the battery cell according to claim 1, wherein, After sending the second communication address to the acquisition module, the method further includes: Send an address reset signal to the acquisition module to generate a first address corresponding to the first communication address in the acquisition module; The first address, the sequence number, and the number are fused together to obtain the second address corresponding to the second communication address; The second address is sent to the acquisition module so that the cell data is encoded using the second address.

3. The data processing method of the battery cell according to claim 1, wherein, The acquisition module is mounted on a single battery cell to form the battery cell, and the method includes: Based on the address allocation instructions of the battery management module, the first communication address of the battery cell is generated and stored in the storage module of the acquisition module; Send the first communication address and the serial number of the battery cell to the battery management module in the battery pack where the battery cell is located, so as to generate the second communication address of the battery cell in the battery management module; Obtain the second communication address and store the second communication address in the storage module; The method further includes, after storing the second communication address in the storage module: The battery cell data collected by the acquisition module is encoded according to the second communication address to obtain encoded battery cell data; the acquisition module is used to store the second communication address in the storage module of the acquisition module, and at the same time, after collecting the battery cell data, the battery cell data is encoded using the second communication address; Based on the first communication address, the system communicates with the battery management module to send coded cell data to the battery management module.

4. The data processing method of the battery cell according to claim 3, wherein, After storing the second communication address in the storage module, the method further includes: Based on the address reset instruction of the battery management module, a first address corresponding to the first communication address of the battery cell is generated, and the first address is stored in the storage module; The first communication address and the serial number of the battery cell are sent to the battery management module so that a second address corresponding to the second communication address is generated in the battery management module. Obtain the second address and store it in the storage module.

5. The data processing method of the battery cell according to claim 1, wherein, The main control module is located within the battery cluster, which includes at least one battery pack, and the battery pack includes at least one battery cell. Each battery cell includes a data acquisition module and a single cell unit. The data acquisition module is located on the single cell unit to form the battery cell. The method includes: A data request instruction is sent to at least one of the battery management modules of the battery pack to obtain cell data sent by the battery management module; the cell data is obtained by encoding the collected cell data using a second communication address; Based on the communication address of the battery management module, the cell data is summarized to obtain the summarized cell data; The aggregated cell data is sent to the central control module for analysis.

6. A battery cell, characterized in that, Data processing is performed using the data processing method for the battery cell described in any one of claims 1-5; the battery cell comprises: Battery cell body; The data acquisition module is electrically connected to both ends of the battery cell body and the battery management module of the battery pack in which the battery cell is located; The acquisition module is configured to acquire battery cell data from the battery cell body; the acquisition module is located on the battery cell body to form the battery cell.

7. A battery management system, characterized by, Data processing is performed using the data processing method for the battery cell as described in any one of claims 1-5; the battery management system includes at least one acquisition module, at least one battery management module, at least one main control module, and a central control module. The battery cell and the acquisition module are disposed on the battery cell to form the battery cell.

8. An energy storage system characterized by, It includes the battery cell of claim 6, or the battery management system of claim 7.

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