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

Abstract

The embodiment of the invention discloses a battery cell and a data processing method thereof, a battery management system and an energy storage system. According to the method, on the premise that a battery cell is provided with an acquisition module, communication address allocation is carried out on the battery cell, so that a first communication address of the battery cell is generated in the acquisition module of the battery cell, and the first communication address and a serial number and a serial number of the battery cell can be fused to obtain a second communication address of the battery cell; and the second communication address is sent to the acquisition module, so that the battery cell data is encoded by adopting the second communication address, the battery cell data acquisition precision can be improved, the communication efficiency between the battery cell and the battery management module can be ensured, the requirement of the data processing performance of the battery management module can be reduced, and the user experience is improved. The production cost of the battery management module is reduced, the installation difficulty of the battery pack can be reduced, and meanwhile, parts of the battery pack can be conveniently replaced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell and a data processing method thereof, a battery management system and an energy storage system. Background Art

[0002] The slave control board in the battery pack is an important part of the battery management system (BMS), which is mainly responsible for monitoring and managing the voltage, current, temperature and other parameters of the battery pack. The slave control board is usually installed near each battery cell in the battery pack, collects the voltage and temperature information of the battery cell, and transmits the collected information to the main control board of the high-voltage box for further processing.

[0003] However, the above-mentioned data collection method usually needs to rely on wired connection to transmit the voltage and temperature data of the battery cell to the battery management system through the data collection harness. Although the above-mentioned method is reliable, it has the problems of high cost, heavy weight, complex installation and low data collection accuracy. Summary of the invention

[0004] In response to the deficiencies in the prior art, the present application provides a battery cell and its data processing method, a battery management system and an energy storage system, which can improve the accuracy of battery cell data collection while ensuring the communication efficiency between the battery cell and the battery management module, and can also reduce the difficulty of battery pack installation and facilitate the replacement of battery pack components.

[0005] In a first aspect, the present application provides a data processing method for a battery cell, which is applied to a battery management module, the battery management module being disposed in a battery pack corresponding to the battery cell, the method comprising:

[0006] Assigning communication addresses to the battery cells to generate first communication addresses of the battery cells in a collection module of the battery cells; wherein the collection module is disposed on the battery cell monomer to form the battery cell; and the battery management module and the collection module communicate using the first communication address;

[0007] The first communication address, the serial number and the number of the battery cell are merged to obtain the second communication address of the battery cell; wherein the number includes one or more of the project number of the battery cell, the energy storage system number, the stack number, and the battery pack number;

[0008] The second communication address is sent 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 of the battery cell provided in the present application, after sending the second communication address to the acquisition module, it also includes:

[0010] Communicate with the acquisition module based on the first communication address to obtain the battery 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 of the battery cell provided in the present application, after sending the second communication address to the acquisition module, it also includes:

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

[0014] Merging the first address, the sequence number and the serial number to obtain a second address corresponding to the second communication address;

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

[0016] In a second aspect, the present application further provides a data processing method for a battery cell, which is applied to a data collection module of the battery cell; the data collection module is arranged on the battery cell monomer to form a battery cell, and the method comprises:

[0017] Generate a first communication address of the battery cell based on the address allocation instruction of the battery management module, and store the first communication address in a storage module of the acquisition module;

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

[0019] A second communication address is obtained, and the second communication address is stored in the storage module.

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

[0021] Encoding the battery cell data collected by the collection module according to the second communication address to obtain the encoded battery cell data;

[0022] Communicate with the battery management module based on the first communication address to send the encoded battery cell data to the battery management module.

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

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

[0025] 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;

[0026] A second address is obtained, and the second address is stored in the storage module.

[0027] In a third aspect, the present application further provides a data processing method for a battery cell, which is applied to a main control module, the main control module is arranged in a battery cluster, the battery cluster includes at least one battery pack, the battery pack includes at least one battery cell, the battery cell includes a collection module and a battery cell monomer; the collection module is arranged on the battery cell monomer to form a battery cell; the method includes:

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

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

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

[0031] In a fourth aspect, the present application provides a battery cell, comprising:

[0032] Battery cell body;

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

[0034] Among them, the acquisition module is configured to collect cell data from the cell body; the acquisition module is arranged on the cell body to form a cell.

[0035] In a fifth aspect, the present 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 general control module;

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

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

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

[0039] In a sixth aspect, the present application further 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 of the battery cell provided in the present application can allocate communication addresses to the battery cell on the premise that an acquisition module is set in the battery cell itself, so as to generate a first communication address of the battery cell in the acquisition module of the battery cell, and can merge the first communication address, the serial number and the number of the battery cell to obtain the second communication address of the battery cell; the second communication address is sent to the acquisition module so that the battery cell data is encoded using the second communication address, thereby improving the accuracy of battery cell data acquisition while ensuring the communication efficiency between the battery cell and the battery management module, reducing the requirements for the data processing performance of the battery management module, reducing the production cost of the battery management module, and reducing the difficulty of installing the battery pack, while also facilitating the replacement of battery pack components. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 A schematic diagram of the structure of a battery cell provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the structure of a battery cluster provided in an embodiment of the present application;

[0045] Figure 4 A first flow chart of a method for processing data of a battery cell provided in an embodiment of the present application;

[0046] Figure 5 A second flow chart of the data processing method for a battery cell provided in an embodiment of the present application;

[0047] Figure 6 A third flow chart of the data processing method for a battery cell provided in an embodiment of the present application.

[0048] Reference numerals:

[0049] 10. Battery pack; 100. Battery cell; 110. Battery cell body; 120. Acquisition module; 121. First module; 122. Second module, 123. Storage module; 130. Temperature sensor; 200. Battery management module; 20. High-voltage box. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work 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 "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

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

[0053] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0054] In addition, in this application, unless otherwise clearly specified or limited in the embodiments, the terms "installed", "connected", "connected" and "fixed" etc. appearing in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that 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 connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific implementation situation.

[0055] In the related art, the battery pack includes multiple battery cells and a battery management module connected in series. The battery management module can be understood as a slave control board, namely a battery management unit (BMU), which can collect voltage, current and temperature of each battery cell. Each battery cell needs to be connected to the slave control board with a long acquisition line, which not only leads to a large number of acquisition harnesses in the battery pack, increasing the harness cost, but also is not conducive to providing the energy density of the battery pack, and increases the installation time cost of the battery pack. Moreover, the acquisition lines are long and of varying lengths, which will also affect the accuracy of the acquisition of the battery cells.

[0056] At the same time, when collecting data, the first battery cell is usually used as a benchmark, and data is collected for the battery cells incrementally, resulting in a gradual decrease in the accuracy of the collected data for each battery cell, which in turn affects the subsequent balancing strategy and also causes the consistency of the battery cells to deteriorate.

[0057] In addition, since the battery cells are directly connected to the battery management module using collection lines, the collection lines at the end cells will be subjected to a higher potential, which may easily lead 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 collection lines need to be redesigned, resulting in poor versatility of the battery pack.

[0058] To this end, the present application provides a battery cell and its data processing method, a battery management system and an energy storage system. The battery cell includes a battery cell body and a collection module, the collection module is electrically connected to the battery management module of the battery pack where the battery cell is located, and the collection module is configured to collect battery cell data from the battery cell body, and is arranged on the battery cell body to form a battery cell. Specifically, it can be externally arranged on the battery cell body to form a battery cell, thereby ensuring that the length of the collection harness of each battery cell in the battery pack is consistent. Compared with the traditional collection method, the harness used is shorter, and there will be no technical problem of poor collection accuracy due to the excessive length of the collection harness. At the same time, since the collection module is installed on the battery cell body, it is easier to install the battery pack later, and it is also convenient to replace the parts of the battery pack later. In addition, the insulation abnormality problem caused by the collection line can also be solved, and the battery management module can also use a universal module, avoiding the problem that the battery management module needs to connect a large number of collection lines, reducing the difficulty of replacing the battery management module on site, reducing the structural size of the battery management module, and avoiding the problem of inconsistent interfaces of the battery management module. At the same time, the energy density of the battery pack can be increased while the battery pack size remains unchanged.

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

[0060] To facilitate understanding, the battery cells, battery packs, battery clusters and energy storage systems are first introduced, and then the data processing method of the battery cells is introduced in detail based on the battery cells, battery packs, battery clusters and energy storage systems.

[0061] See also Figure 1 , Figure 1 Schematic diagram of the structure of the battery cell 100 provided in the embodiment of the present application. Figure 1 As shown,

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

[0063] Battery cell body 110;

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

[0065] The acquisition module 120 is configured to collect data of the battery cell 100 from the battery cell body 110 ; the acquisition module 120 is disposed 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) board and be arranged on the battery cell body 110 to be assembled into a separate battery cell 100, so that the battery cell 100 itself can have the function of data acquisition, and then after the voltage, current and temperature of the battery cell 100 itself are collected, it can be directly sent to the battery management module 200 in the battery pack 10, and after being summarized and packaged by the battery management module 200, it is sent to the main control board in the high-voltage box 20, and the main control board is summarized and packaged again and sent to the main control board for analysis.

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

[0068] At the same time, since the acquisition module 120 is part of the battery cell 100, there is no acquisition harness between each battery cell 100 and the battery management module 200, only a communication harness, a power supply harness and a control harness. While one end of the communication harness and the power supply harness of each battery cell 100 are electrically connected to their respective acquisition modules 120, the other end of the communication harness of each battery cell 100 can be connected to the battery management module 200; the other end of the power supply harness of each battery cell 100 can be connected to the battery management module 200; the acquisition modules 120 of each battery cell 100 are connected by a control harness, and the acquisition module 120 of one of the battery cells 100 can be connected to the battery management module 200 by a control harness, so as to achieve synchronization of control of each battery cell 100. In addition, the acquisition modules of each battery cell in the battery pack are not connected to each other, and there is no problem of insulation abnormality and overvoltage of the acquisition chip.

[0069] The battery cell 100 provided in the present application includes a battery cell body 110 and a collection module 120. The collection module 120 is electrically connected to the battery management module 200 of the battery pack 10 where the battery cell 100 is located. At the same time, the collection module 120 is configured to collect battery cell 100 data for the battery cell body 110, and is arranged on the battery cell body 110 to form the battery cell 100, thereby ensuring that the length of the collection harness of each battery cell 100 in the battery pack 10 is consistent. Compared with the traditional collection method, the harness used is shorter, and there will be no technical problem of poor collection accuracy caused by too long a collection harness. At the same time, since the collection module 120 is installed on the battery cell body 110, it is easier to install the battery pack 10 later, and it is also convenient to replace the components of the battery pack 10 later. In addition, the insulation abnormality problem caused by the acquisition line can also be solved, and the battery management module 200 can also adopt a universal module, avoiding the problem that the battery management module 200 needs to be connected to a large number of acquisition lines, 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, the energy density of the battery pack 10 can also be increased while the size of the battery pack 10 remains unchanged.

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

[0071] In this embodiment, the battery cell 100 is further provided with a temperature sensor 130 , which can be arranged at the battery cell body 110 , and both ends of the acquisition module 120 are electrically connected to the temperature sensor 130 to obtain temperature data collected by the temperature sensor 130 on the battery cell body 110 .

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

[0073] In some embodiments, 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 is integrated with a first module 121, and the first module 121 is electrically connected to both ends (positive and negative) of the battery cell body 110, and is also electrically connected to the temperature sensor 130, so that the voltage data and temperature data of the battery cell body 110 can be obtained. Among them, the temperature sensor 130 can be integrated into the acquisition module 120, or connected to the acquisition module 120 through an acquisition harness and arranged at 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 make specific restrictions.

[0075] In some embodiments, the first module 121 is further configured to balance the battery cell body 110 .

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

[0077] In some embodiments, 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 a power supply end, a communication end, and a control end of the acquisition module 120 .

[0078] In this embodiment, the second module 122 can be integrated with the first module 121 on the PCB board to form the acquisition module 120. The first module 121 and the second module 122 are electrically connected. At the same time, at least one of the power supply terminal, the communication terminal and the control terminal can be set on the second module 122, so that the battery management module 200 can communicate, supply power and control the acquisition module 120 of each battery cell 100 in the battery pack 10. Among them, 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, Figure 1 As shown, 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 .

[0080] In this embodiment, a storage module 123, i.e., a memory, may also be provided in the acquisition module 120 of each battery cell 100. 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 may be integrated on a PCB board to form the acquisition module 120. At the same time, the storage module 123 may store the battery cell 100 data collected by the acquisition module 120, and may also store the communication address of the battery cell 100, so that a separate battery cell 100 may be used for subsequent tracing.

[0081] In addition, the acquisition module of each battery cell in the battery pack adopts a communication and power supply isolation circuit design, which can further improve the insulation performance and reliability. It can not only protect the acquisition module from being damaged by the high voltage of the external power supply, but also ensure that the acquisition module will not be 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 provide power to the acquisition module 120 .

[0083] In this embodiment, the battery management module 200 can be understood as a slave control board in the battery pack 10, that is, a battery management unit (BMU). In this application, it is not necessary to collect data on the battery cells 100 in the battery pack 10. The battery management module 200 can summarize the battery cell 100 data collected by the collection module 120 of each battery cell 100 in the battery pack 10, and then send it to the main control board of the high-voltage box 20, and then summarize and package it again through the main control board of the high-voltage box 20, send it to the main control board, and perform data analysis in the main control board.

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

[0085] At least one battery cell 100 provided by the present application;

[0086] The battery management module 200 is electrically connected to the acquisition module 120 of the battery cell 100 .

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

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

[0089] At least one battery pack 10 provided by the present application;

[0090] The high voltage box 20 is electrically connected to the positive electrode and the negative electrode 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 a plurality of battery packs 10 connected in series and in parallel. After the battery packs 10 are connected in series and in parallel, they can be charged and discharged externally through the high-voltage box 20. At the same time, the main control board in the high-voltage box 20 can supply power to the battery management module 200 in each battery pack 10, and the high-voltage box 20 communicates with the battery management module 200 in each battery pack 10.

[0093] In some embodiments, the present 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 general control module, wherein the acquisition module is arranged on the battery cell to form a battery cell, the battery management module is arranged in the battery pack of the energy storage system, and can communicate with the acquisition module and power the acquisition module, the main control module is arranged in the high-voltage box, and can communicate with the battery management module and power the battery management module, and the general control module can be arranged in the junction cabinet of the energy storage system, and can communicate with the main control module.

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

[0095] It can be 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 intended to more clearly illustrate 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. It is known to those skilled in the art that with the evolution of the system and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems. The following are detailed descriptions.

[0096] It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments. The data processing method of the battery cell is described in detail below. At the same time, the data processing method of 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] See also Figure 4 , Figure 4 A first flow chart of the data processing method for a battery cell provided in an embodiment of the present application.

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

[0099] S110, assigning communication addresses to the battery cells to generate first communication addresses of the battery cells in a collection module of the battery cells; wherein the collection module is disposed on the battery cell monomer to form the battery cell; and the battery management module and the collection module communicate using the first communication address;

[0100] S120, combining the first communication address, the serial number and the number of the battery cell to obtain a second communication address of the battery cell; wherein the number includes one or more of the project number of the battery cell, 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 being assembled into a battery pack and applied to the energy storage system, if the battery management module in the battery pack and the acquisition module of the battery cell are powered normally, the battery management module can assign communication addresses to all the 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 storage module of the acquisition module to facilitate the subsequent use of the first communication address to communicate with the battery management module.

[0103] Specifically, in the process of allocating communication addresses to the battery cells in the battery pack, the battery management module can designate the first communication address generated by one of the battery cells as number 0001, and then increase it sequentially to complete the address allocation to all the battery cells in the battery pack. After generating the first communication address, each battery cell in the battery pack can send the first communication address and the battery cell's own serial number to the battery management system. After receiving the first communication address and serial number sent by the battery cell, the battery management system can merge the first communication address, serial number and battery 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 collected battery cell data to the battery management module, it can be encoded based on the second communication address. After the encoding is completed, the battery cell data 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 then sent to the main control module of the battery management system for analysis via the main control module.

[0104] Since each battery cell is equipped with a separate collection module, the format, sequence and time of the battery cell data collected from each battery cell are the same, so it can be directly analyzed in the master control module and can be directly drawn into tables and graphs to facilitate accurate analysis of the data of each battery cell in the energy storage system.

[0105] Among them, in the process of integrating the first communication address, the serial number and number of the battery cell, the battery management module can integrate one or more of the project number, energy storage system number, stack number, and battery pack number of the battery cell with the first communication address and the serial number of the battery cell, so that before the battery cell data is analyzed in the master control module, the project number, energy storage system number, stack number, and battery pack number of each battery cell data can be directly displayed in the master control module, thereby achieving the purpose of quickly and accurately analyzing the battery cell data. At the same time, the second communication address can also play a role in tracing information during the use of the battery cell throughout its life cycle.

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

[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 the storage module of the acquisition module. At the same time, after collecting the battery cell data, the acquisition module can use the second communication address to encode the battery cell data. After the battery cell data encoding is completed, the acquisition module and the battery management system use the first communication address to communicate, and during the communication process, the encoded battery cell data is sent to the battery management module. After receiving the encoded battery cell data, the battery management module can communicate with the main control module based on its own communication address to send the encoded battery cell data to the main control module.

[0108] Among them, before sending the encoded cell data to the main control module, the battery management system can aggregate and package the cell data of all cells in the battery pack after receiving the encoded 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, it also 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; sending the second address to the acquisition module so that the battery 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 or battery cell of a battery cell is replaced, it is necessary to reallocate communication addresses for all battery cells in the battery pack so that the acquisition module and the battery management module use the first address for communication. At the same time, the acquisition module uses the second address to encode the battery cell data, so that the updated battery cell data can be accurately obtained later.

[0111] See also Figure 5 , Figure 5 A second flow chart of the data processing method for a battery cell provided in an embodiment of the present application.

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

[0113] S210, generating a first communication address of the battery cell based on the address allocation instruction of the battery management module, and storing the first communication address in a storage module of the acquisition module;

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

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

[0116] In this embodiment, after the acquisition module receives the address allocation instruction from the battery management module, a certain battery cell in the battery pack can generate a first communication address with the number 0001, and then increase it sequentially to complete the address allocation of all battery cells in the battery pack. After generating the first communication address, each battery cell in the battery pack can send the first communication address and the battery cell's own serial number to the battery management system. After receiving the first communication address and serial number sent by the battery cell, the battery management system can merge the first communication address, the serial number and the battery 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 collected battery cell data to the battery management module, it can be encoded based on the second communication address. After the encoding is completed, the battery cell data can be sent by the acquisition module to the battery management module, and sent by the battery management module to the main control module of the high-voltage box, and sent to the main control module of the battery management system via the main control module for analysis.

[0117] Among them, after the first communication address and the second communication address are stored in the acquisition module, if a battery cell failure occurs subsequently, the battery cell can be directly analyzed through the battery cell acquisition module after replacement, thereby tracing the information during the entire life cycle of the battery cell.

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

[0119] In the present embodiment, after the address of each battery cell in the battery pack is allocated, the acquisition module of each battery cell in the battery pack can realize the synchronous acquisition of the battery data of its respective battery cell monomer. After the battery data acquisition is completed, it can be encoded according to its respective second communication address. After the battery data encoding is completed, while sending the encoded battery data to the battery management module, the encoded data can also be directly stored in the storage module of the respective acquisition module, so that the data analysis can be performed separately through the battery cell later, so as to realize the tracking of the battery data and locate the battery cell with problems more quickly.

[0120] In some embodiments, after storing the second communication address in the storage module, it also includes: based on the address reset instruction of the battery management module, generating a first address corresponding to the first communication address of the battery cell, 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 or battery cell of a battery cell is replaced, it is necessary to reallocate communication addresses for all battery cells in the battery pack so that the acquisition module and the battery management module use the first address for communication. At the same time, the acquisition module uses the second address to encode the battery cell data, so that the updated battery cell data can be accurately obtained later.

[0122] See also Figure 6 , Figure 6 A third flow chart of the data processing method for a battery cell provided in an embodiment of the present application.

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

[0124] S310, sending a data request instruction to a battery management module of at least one battery pack to obtain battery cell data sent by the battery management module;

[0125] S320, summarizing the cell data based on the communication address of the battery management module to obtain summarized cell data;

[0126] S330: Send the summarized cell data to the master control module so that the cell data is analyzed in the master control module.

[0127] In this embodiment, the main control module can send a data request instruction to the battery management module of each battery pack in the battery cluster. After aggregating and packaging the cell data in each battery pack, the battery management module of each battery pack in the battery cluster can send the aggregated and packaged cell data to the main control module according to the request instruction. After receiving the cell data sent by all battery packs in the battery cluster, the main control module can aggregate and package the cell data again and send it to the general control module in the form of a data packet. The general control module can parse the cell data sent by the main control module in each battery cluster in the energy storage system. Since the format, sequence and time of each data packet are the same, the general control module can draw 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 of the battery cell provided in the present application can assign communication addresses to the battery cell on the premise that an acquisition module is set in the battery cell itself, so as to generate a first communication address of the battery cell in the acquisition module of the battery cell, and can merge the first communication address, the serial number and the number of the battery cell to obtain the second communication address of the battery cell; the second communication address is sent to the acquisition module so that the battery cell data is encoded using the second communication address, thereby improving the accuracy of battery cell data acquisition while ensuring the communication efficiency between the battery cell and the battery management module, and can also reduce the difficulty of installing the battery pack, and also facilitate the replacement of battery pack components.

[0129] In addition, the present application sets up an acquisition module for each battery cell to achieve higher frequency sampling, and also unifies the communication interface and communication protocol of the acquisition module of each battery cell, so that the battery management module requires fewer interfaces, the performance requirements of the battery management module are reduced, and a smaller battery management module can be used, which improves the energy density of the battery pack. The battery management module only plays a rough processing role of the data, which reduces the data processing performance requirements of the battery management module and reduces the production cost of the battery management module.

[0130] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A data processing method for a battery cell, characterized in that: Applied to a battery management module, the battery management module is provided in a battery pack corresponding to the battery cell, the method comprising: Assigning a communication address to the battery cell to generate a first communication address of the battery cell in a collection module of the battery cell; wherein the collection module is provided on a battery cell monomer to form the battery cell; the battery management module and the collection module communicate with each other using the first communication address; The first communication address, the serial number and the number of the battery cell are merged to obtain a second communication address of the battery cell; wherein the number includes one or more of the project number, the energy storage system number, the stack number, and the battery pack number of the battery cell; The second communication address is sent to the acquisition module, so that the cell data acquired by the acquisition module is encoded using the second communication address.

2. The data processing method of the battery cell according to claim 1, characterized in that: After sending the second communication address to the acquisition module, the method further includes: Communicate with the acquisition module based on the first communication address to obtain the cell data encoded using the second communication address; Based on the communication address of the battery management module, the battery cell data is sent to the main control module where the battery pack is located.

3. The data processing method of the battery cell according to any one of claims 1 to 2, characterized in that: 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; Merging the first address, the serial number and the serial number to obtain a 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.

4. A data processing method for a battery cell, characterized in that: Applicable to the acquisition module of the battery cell; The acquisition module is arranged on the battery cell monomer to form the battery cell. The method comprises: Based on the address allocation instruction of the battery management module, generate a first communication address of the battery cell, and store the first communication address in a storage module of the acquisition module; Sending the first communication address and the serial number of the battery cell to a battery management module in a battery pack where the battery cell is located, so as to generate a second communication address of the battery cell in the battery management module; The second communication address is acquired, and the second communication address is stored in the storage module.

5. The data processing method of the battery cell according to claim 4, characterized in that: After storing the second communication address in the storage module, the method further includes: Encoding the battery cell data collected by the collection module according to the second communication address to obtain the encoded battery cell data; Communicate with the battery management module based on the first communication address to send the encoded battery cell data to the battery management module.

6. The data processing method of the battery cell according to claim 5, characterized in that: 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, generate a first address corresponding to the first communication address of the battery cell, and store 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; The second address is obtained, and the second address is stored in the storage module.

7. A data processing method for a battery cell, characterized in that: Applied in a main control module, the main control module is arranged in a battery cluster, the battery cluster includes at least one battery pack, the battery pack includes at least one battery cell, the battery cell includes a collection module and a battery cell monomer; the collection module is arranged on the battery cell monomer to form the battery cell; the method includes: Sending a data request instruction to a battery management module of at least one of the battery packs to obtain the battery cell data sent by the battery management module; Based on the communication address of the battery management module, the battery cell data is aggregated to obtain aggregated battery cell data; The aggregated cell data is sent to the master control module so that the cell data can be analyzed in the master control module.

8. A battery cell, characterized in that: Data processing is performed using the data processing method for a battery cell according to any one of claims 1 to 7; the battery cell comprises: Battery cell body; A collection module, electrically connected to two ends of the battery cell body and a battery management module of the battery pack where the battery cell is located; Wherein, the acquisition module is configured to collect cell data from the cell body; the acquisition module is arranged on the cell body to form the cell.

9. A battery management system, characterized in that: It includes at least one acquisition module, at least one battery management module, at least one main control module and a general control module; Wherein, the battery cell and the acquisition module are arranged on the battery cell to form the battery cell; the acquisition module executes the data processing method of the battery cell according to any one of claims 4 to 6, or The battery management module executes the data processing method of the battery cell according to any one of claims 1 to 3, or The main control module executes the data processing method of the battery cell according to claim 7.

10. An energy storage system, characterized in that: Includes the battery cell as claimed in claim 8, or the battery management system as claimed in claim 9.

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