Battery cell, battery pack, battery cluster, battery management system, energy storage system, and data processing method for battery cell

Abstract

Provided in the present application are a battery cell, a battery pack, a battery cluster, a battery management system, an energy storage system, and a data processing method for a battery cell. The battery cell comprises a battery cell body and a collection module, wherein the collection module is electrically connected to two ends of the battery cell body and a battery management module of a battery pack where the battery cell is located, and the collection module is configured to collect battery cell data of the battery cell body and is disposed on the battery cell body to form the battery cell.

Description

Data processing methods for battery cells, battery packs, battery clusters, battery management systems, energy storage systems, and battery cells.

[0001] This application claims priority to Chinese patent application No. 202423319878.X, filed with the Chinese Patent Office on December 31, 2024; and,

[0002] This application also claims priority to Chinese patent application No. 202411997823.6, filed with the Chinese Patent Office on December 31, 2024;

[0003] The entire contents of the above applications are incorporated herein by reference. Technical Field

[0004] This application relates to the field of battery technology, specifically to a data processing method for a battery cell, battery pack, battery cluster, battery management system, energy storage system, and battery cell. Background Technology

[0005] 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. Invention Overview

[0006] However, the data acquisition methods of related technologies 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 reliable, this method suffers from high cost, heavy weight, complex installation, and low data acquisition accuracy.

[0007] 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:

[0008] 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 battery cell body to form the battery cell; the battery management module and the acquisition module communicate using the first communication address;

[0009] 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;

[0010] 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.

[0011] 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 disposed on the battery cell body to form a battery cell, and the method includes:

[0012] 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;

[0013] 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;

[0014] Obtain the second communication address and store it in the storage module.

[0015] 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 battery cell body. The data acquisition module is located on the battery cell body to form the battery cell. The method includes:

[0016] 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;

[0017] Based on the communication address of the battery management module, the cell data is summarized to obtain the summarized cell data;

[0018] The aggregated cell data is sent to the central control module for analysis.

[0019] Fourthly, this application provides a battery cell comprising:

[0020] Battery cell body;

[0021] 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;

[0022] 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.

[0023] Fifthly, this application also provides a battery pack comprising:

[0024] At least one battery cell provided by a fourth party;

[0025] Battery management module, data acquisition module for electrical connection to battery cells.

[0026] Sixthly, this application also provides a battery cluster comprising:

[0027] At least one battery pack provided by the fifth aspect;

[0028] The high-voltage box is electrically connected to the positive and negative terminals of the battery pack.

[0029] The high-voltage box is configured to communicate with the battery management system and / or to supply power to the battery management module.

[0030] Seventhly, 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;

[0031] The battery cell body and the data acquisition module are mounted on the battery cell body to form a battery cell; the data acquisition module executes the data processing method for the battery cell provided in the second aspect; or,

[0032] The battery management module executes the cell data processing method provided in the first aspect; or,

[0033] The main control module executes the data processing method for the battery cell provided by the third party.

[0034] Eighthly, 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 seventh aspect. Beneficial effects

[0035] This application provides a battery cell that can reduce the length of the data acquisition harness, improve the accuracy of battery cell data acquisition, reduce the difficulty of battery pack installation, and facilitate the replacement of battery pack components.

[0036] This application provides a battery pack that can reduce the length of the data acquisition harness, improve the accuracy of cell data acquisition, reduce the difficulty of battery pack installation, and facilitate the replacement of battery pack components.

[0037] This application provides a battery cluster that can reduce the length of the acquisition harness, improve the accuracy of cell data acquisition, reduce the difficulty of battery pack installation, and facilitate the replacement of battery pack components.

[0038] This application provides a cell data processing method that improves the accuracy of cell data acquisition, ensures the communication efficiency between the cell and the battery management module, reduces the difficulty of battery pack installation, and facilitates the replacement of battery pack components.

[0039] This application provides a battery management system that improves the accuracy of cell data acquisition, ensures the communication efficiency between the cells and the battery management module, reduces the difficulty of battery pack installation, and facilitates the replacement of battery pack components.

[0040] This application provides an energy storage system that improves the accuracy of cell data acquisition, ensures the communication efficiency between the cells and the battery management module, reduces the difficulty of battery pack installation, and facilitates the replacement of battery pack components. Attached Figure Description

[0041] Figure 1 is a schematic diagram of the structure of the battery cell provided in this application;

[0042] Figure 2 is a schematic diagram of the battery pack provided in this application;

[0043] Figure 3 is a schematic diagram of the structure of the battery cluster provided in this application;

[0044] Figure 4 is a schematic diagram of the first flow of the data processing method for the battery cell provided in this application;

[0045] Figure 5 is a schematic diagram of the second process of the data processing method for the battery cell provided in this application;

[0046] Figure 6 is a schematic diagram of the third process of the data processing method for the battery cell provided in this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] 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. Embodiments of the present invention

[0049] In the description of this application, 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.

[0050] In the description of this application, the terminology used in this specification is not intended to be limiting. 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.

[0051] In the description of this application, the term “and / or” as used in this 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.

[0052] Furthermore, in this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 will be able to understand the specific meaning of the terms in this application based on the specific implementation.

[0053] 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 long acquisition cables, resulting in numerous acquisition cable bundles within the battery pack, increasing cable bundle costs, hindering the improvement of the battery pack's energy density, and increasing the installation time cost. Furthermore, the long and inconsistent lengths of the acquisition cables can affect the accuracy of cell data acquisition.

[0054] Meanwhile, when collecting data, the first cell is usually used as a reference, and data is collected from each cell in turn. 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.

[0055] 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.

[0056] To address this, this application provides a data processing method for a battery cell, battery pack, battery cluster, battery management system, energy storage system, and a battery cell. 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 battery cell. Specifically, it can be externally mounted on the cell body to form a battery cell. This ensures that the length of the data acquisition harness for each cell within the battery pack is consistent. Compared to traditional acquisition methods, this method uses shorter harnesses and avoids the technical problem of poor acquisition accuracy due to excessively long data acquisition harnesses. Furthermore, since the data acquisition module is mounted on the cell body, it facilitates subsequent battery pack installation and replacement of battery pack components. Additionally, it solves the insulation abnormality problem caused by the data acquisition wires, and the battery management module can use a universal module, avoiding the need to connect a large number of data acquisition wires to the battery management module, reducing the difficulty of on-site replacement of the battery management module, 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 without changing the overall battery pack size.

[0057] Embodiments of this application provide a data processing method for battery cells, battery packs, battery clusters, battery management systems, energy storage systems, and battery cells.

[0058] 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 these concepts.

[0059] Please refer to Figure 1, which is a schematic diagram of the structure of the battery cell 100 provided in an embodiment of this application. As shown in Figure 1, this application provides a battery cell 100, which includes:

[0060] Battery cell body 110;

[0061] The 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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 a 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 to avoid insulation abnormalities and overvoltage issues with the acquisition chip.

[0066] 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 avoids the technical problem of poor data acquisition accuracy due to excessively long data acquisition harnesses. 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 facilitates the replacement of 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.

[0067] In some embodiments, as shown in FIG1, the battery cell 100 further 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 respectively electrically connected to the two ends of the temperature sensor 130, and the temperature sensor 130 is configured to acquire the temperature of the battery cell body 110.

[0068] 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.

[0069] 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.

[0070] In some embodiments, as shown in FIG1, 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.

[0071] 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.

[0072] In some embodiments, the first module 121 is further configured to perform equalization on the cell body 110.

[0073] 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.

[0074] In some embodiments, as shown in FIG1, the acquisition module 120 further 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.

[0075] 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.

[0076] In some embodiments, as shown in FIG1, the acquisition module 120 further 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.

[0077] 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.

[0078] 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 insulation performance and reliability. This can protect the acquisition module from damage by external high voltage and also ensure that the acquisition module is not damaged by the battery management system.

[0079] 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.

[0080] 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.

[0081] In some embodiments, as shown in FIG2, this application also provides a battery pack 10, which includes:

[0082] At least one battery cell 100 provided in this application;

[0083] Battery management module 200, and data acquisition module 120 electrically connected to battery cell 100.

[0084] 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.

[0085] In some embodiments, as shown in FIG3, this application also provides a battery cluster comprising:

[0086] At least one battery pack 10 provided in this application;

[0087] The high-voltage box 20 is electrically connected to the positive and negative terminals of the battery pack 10, respectively;

[0088] The high-voltage box 20 is configured to communicate with the battery management system and to supply power to the battery management module 200.

[0089] 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.

[0090] 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 the battery cell body 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.

[0091] 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.

[0092] It is understood that 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 follow.

[0093] The data processing method for the battery cell is described in detail below. 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.

[0094] Please refer to Figure 4, which is a schematic diagram of the first flow of the data processing method for battery cells provided in the embodiments of this application.

[0095] In some embodiments, as shown in FIG4, this application provides a data processing method for a battery cell, which is applied to a battery management module. The battery management module is located in the battery pack corresponding to the battery cell. The method includes steps S110, S120 and S130.

[0096] S110. 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 the battery cell body to form the battery cell; the battery management module and the acquisition module communicate using the first communication address;

[0097] 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;

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] Please refer to Figure 5, which is a second flowchart of the data processing method for battery cells provided in the embodiments of this application.

[0109] In some embodiments, as shown in FIG5, 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 disposed on the battery cell body to form a battery cell, and the method includes steps S210, S220 and S230.

[0110] 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;

[0111] 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.

[0112] S230. Obtain the second communication address and store the second communication address in the storage module.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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 own cell body. After the cell data collection is completed, it can be encoded according to its own 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, so that data analysis can be performed on the cell individually to achieve cell data tracking and more quickly locate the problematic cell.

[0117] 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.

[0118] 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.

[0119] Please refer to Figure 6, which is a schematic diagram of the third process of the data processing method for battery cells provided in the embodiments of this application.

[0120] In some embodiments, as shown in FIG5, 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 battery cell body. The data acquisition module is located on the battery cell body to form the battery cell. The method includes steps S310, S320 and S330.

[0121] 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.

[0122] S320: Based on the communication address of the battery management module, the cell data is summarized to obtain the summarized cell data;

[0123] S330. The summarized cell data is sent to the central control module for analysis.

[0124] 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.

[0125] 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.

[0126] 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 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.

Claims

1. A battery cell (100), comprising: Battery cell body (110); The acquisition module (120) is electrically connected to both ends of the cell body (110) and the battery management module (200) of the battery pack (10) where the cell (100) is located. The acquisition module (120) is configured to acquire battery cell (100) data from the battery cell body (110); the acquisition module (120) is located on the battery cell body (110) to form the battery cell (100).

2. The battery cell (100) according to claim 1, wherein, The battery cell (100) also includes a temperature sensor (130). The acquisition module (120) is further provided with a first end and a second end, which are electrically connected to the two ends of the temperature sensor (130) respectively. The temperature sensor (130) is configured to acquire the temperature of the battery cell body (110).

3. The battery cell (100) according to claim 2, wherein, The temperature sensor (130) includes a droplet-shaped thermistor.

4. The battery cell (100) according to claim 1, wherein, 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).

5. The battery cell (100) according to claim 4, wherein, The first module (121) is also configured to perform equalization on the cell body (110).

6. The battery cell (100) according to claim 4, wherein, The acquisition module (120) also includes a second module (122); 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).

7. The battery cell (100) according to claim 6, wherein, The acquisition module (120) also includes a storage module (123); 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).

8. The battery cell (100) according to any one of claims 1-7, wherein, The battery management module (200) is configured to communicate with the acquisition module (120); or / and, The battery management module (200) is configured to power the acquisition module (120).

9. A battery pack (10), comprising: At least one battery cell (100) according to any one of claims 1-8; A battery management module (200) is electrically connected to a data acquisition module (120) of the battery cell (100).

10. A battery cluster, comprising: At least one battery pack (10) as described in claim 9; The high-voltage box (20) is electrically connected to the positive and negative terminals of the battery pack (10); The high-voltage box (20) is configured to communicate with the battery management system and / or to supply power to the battery management module (200).

11. A data processing method for a battery cell (100), applied to a battery management module (200), the battery management module (200) being disposed in a battery pack (10) corresponding to the battery cell (100), the method comprising: A communication address is assigned to the battery cell (100) to generate a first communication address for the battery cell (100) in the acquisition module (120) of the battery cell (100); wherein the acquisition module (120) is disposed on the battery cell body (110) to form the battery cell (100); the battery management module (200) and the acquisition module (120) communicate using the first communication address; The first communication address, the serial number and number of the battery cell (100) are fused to obtain the second communication address of the battery cell (100); wherein, the number includes one or more of the following: the project number, the energy storage system number, the stack number, and the battery pack (10) number; Send the second communication address to the acquisition module (120) so that the data of the battery cell (100) acquired by the acquisition module (120) is encoded using the second communication address.

12. A data processing method for a battery cell (100), applied in a data acquisition module (120) of the battery cell (100); the data acquisition module (120) is disposed on the battery cell body (110) to form the battery cell (100), the method comprising: Based on the address allocation instruction of the battery management module (200), the first communication address of the battery cell (100) is generated and stored in the storage module (123) of the acquisition module (120); Send the first communication address and the serial number of the battery cell (100) to the battery management module (200) in the battery pack (10) where the battery cell (100) is located, so as to generate the second communication address of the battery cell (100) in the battery management module (200); Obtain the second communication address and store the second communication address in the storage module (123).

13. A data processing method for a battery cell (100), applied in a main control module, the main control module being disposed in a battery cluster, the battery cluster including at least one battery pack (10), the battery pack (10) including at least one of the battery cells (100), the battery cell (100) including a data acquisition module (120) and a battery cell body (110); the data acquisition module (120) being disposed on the battery cell body (110) to form the battery cell (100); the method comprising: Send a data request instruction to at least one of the battery management modules (200) of the battery pack (10) to obtain cell (100) data sent by the battery management module (200); Based on the communication address of the battery management module (200), the data of the battery cell (100) is summarized to obtain the summarized battery cell (100) data; The aggregated cell (100) data is sent to the central control module for analysis.

14. A battery management system, comprising at least one acquisition module (120), at least one battery management module (200), at least one main control module and a central control module; in, The battery cell body (110) and the acquisition module (120) are disposed on the battery cell body (110) to form the battery cell (100); the acquisition module (120) executes the data processing method of the battery cell (100) according to claim 12; or, The battery management module (200) executes the data processing method of the battery cell (100) as described in claim 11; or, The main control module executes the data processing method of the battery cell (100) as described in claim 13.

15. An energy storage system comprising a battery cell (100) as described in any one of claims 1-8, or a battery management system as described in claim 14.

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