Battery management system based on near-field wireless communication, battery communication control method, computer-readable storage medium and power battery pack

Abstract

The present invention relates to the field of battery management technology, and specifically discloses a battery management system based on near-field wireless communication, a battery communication control method, a computer-readable storage medium, and a power battery pack. The battery management system includes: a bracket, which is arranged one-to-one on the top of each battery cell, a control circuit board connected to the battery cell is fixedly arranged on the bracket, and a wireless acquisition module is arranged on the control circuit board; a linear antenna, which is arranged at the bottom of the top cover of the battery module, and the linear antenna is arranged in a vertical direction corresponding to the wireless acquisition module; a wireless receiving device, which is arranged at one end of the linear antenna, and is used for wireless communication with the corresponding wireless acquisition module through the linear antenna; a battery management unit, which is electrically connected to at least one wireless receiving device, and is used to perform corresponding communication management operations on the corresponding battery cell through the wireless receiving device. The embodiment of the present invention can optimize the wiring design scheme in the battery pack and improve the active balancing performance of the battery system.

Description

Technical Field

[0001] The present invention relates to the technical field of battery management, and in particular to a battery management system based on near-field wireless communication, a battery communication control method based on near-field wireless communication, a computer-readable storage medium and a power battery pack. Background Art

[0002] With the continuous development of new energy technology, power battery technology has been widely used in various fields of life and production. As one of the basic units of power batteries, the battery pack is composed of multiple battery cells or battery modules. Each battery cell or module is connected in series or parallel to form a battery pack.

[0003] During the application process, in order to clearly control the actual usage status of each battery cell or battery module, so as to accurately control it and improve its service life and safety of use, it is often necessary to configure corresponding data acquisition cables and communication cables for each battery cell or battery module to collect the battery information of each battery cell or module in real time.

[0004] However, in actual application, the above configuration method requires laying a large number of cables in the battery pack, which takes up extra space on the one hand; on the other hand, for new energy engineering equipment, a customized battery system is often required, and the above customized wiring will lead to low work efficiency, and therefore cannot meet the actual needs of the enterprise. Summary of the invention

[0005] In order to overcome the above technical problems existing in the prior art, the embodiment of the present invention provides a battery management system based on near-field wireless communication. Through the configuration of the wireless acquisition module and the linear antenna, the poor contact or signal attenuation problems caused by the traditional wired connection are reduced, and efficient and stable data transmission is achieved. The battery management unit communicates with each battery cell through a wireless receiving device, can monitor the battery status in real time, realize more intelligent battery management, extend the battery life, and actively balance adjacent batteries through the balancing line, thereby achieving an active balancing current of 2-4A.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a battery management system based on near-field wireless communication, which is applied to a power battery pack, wherein the power battery pack includes multiple battery modules, each battery module includes multiple battery cells, and adjacent battery cells are connected in sequence through conductive bars. The battery management system includes: a bracket, which is arranged one-to-one on the top of each battery cell, and a control circuit board connected to the battery cell is fixedly arranged on the bracket, and a wireless acquisition module is arranged on the control circuit board; a linear antenna, which is arranged to pass through the bottom of the battery module top cover, and the linear antenna is arranged corresponding to the wireless acquisition module in the vertical direction; a wireless receiving device, which is arranged at one end of the linear antenna, and is used for wirelessly communicating with the corresponding wireless acquisition module through the linear antenna; a battery management unit, which is electrically connected to at least one wireless receiving device, and is used to perform corresponding communication management operations on the corresponding battery cell through the wireless receiving device.

[0007] Preferably, a cell balancing module is also provided on the control circuit board, and the cell balancing modules of adjacent cells are connected via a balancing line; the cell balancing module is used to collect voltage information of corresponding cells, and perform active balancing operations on corresponding cells via the balancing line based on the voltage information.

[0008] Preferably, the wireless acquisition module is used to: collect parameter data of the corresponding battery cell; perform encryption processing on the parameter data to obtain first encrypted battery cell data; wirelessly transmit the first encrypted battery cell data to the linear antenna; the linear antenna transmits the first encrypted battery cell data to the battery management unit through the wireless receiving device.

[0009] Preferably, the battery management unit is also used to: obtain the current voltage of the current battery cell through the battery cell balancing module, and obtain the adjacent voltage of the battery cell adjacent to the current battery cell; based on the current voltage and the adjacent voltage, determine whether there is an unbalanced condition between the current battery cell and the adjacent battery cell; if so, output a corresponding active balancing control instruction; the battery cell balancing module is also used to: perform a corresponding active balancing operation through the balancing line based on the active balancing control instruction.

[0010] Preferably, the wireless acquisition module is also used to: add random feature quantities to the parameter data; perform encryption operations on the parameter data and the random feature quantities to obtain second encrypted data; the battery management unit is also used to: parse the second encrypted data, determine the target battery cell, obtain the physical position of the target battery cell, and establish a binding relationship between the target battery cell and the physical position.

[0011] Preferably, the battery management unit is further used to: perform a temperature raising operation on each battery cell in turn;

[0012] Based on the temperature raising operation, a battery cell with abnormal temperature is determined; a physical location of the battery cell with abnormal temperature is acquired; and a binding relationship between the battery cell with abnormal temperature and the physical location is established.

[0013] Preferably, performing the temperature raising operation on each battery cell in turn includes: determining a target temperature, and randomly controlling each battery cell in turn to perform a corresponding continuous discharge operation according to the target temperature; or performing a heating operation on each battery cell in turn through a preset heating device.

[0014] Correspondingly, the present invention also provides a battery communication control method based on near-field wireless communication, which is applied to the battery management system described in an embodiment of the present invention. The method includes: collecting parameter data of each battery cell and sending the parameter data based on near-field wireless communication; receiving and storing the parameter data; generating control instructions corresponding to the parameter data; and sending the control instructions to the corresponding battery cell based on near-field wireless communication.

[0015] Accordingly, the present invention further provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the method provided by the embodiment of the present invention is implemented.

[0016] Furthermore, the present invention also provides a power battery pack, wherein the power battery includes a plurality of battery modules, each battery module includes a plurality of battery cells, and the power battery includes the battery management system described in the embodiment of the present invention.

[0017] Through the technical solution provided by the present invention, the present invention has at least the following technical effects:

[0018] In terms of voltage / current acquisition, this solution can cover the voltage acquisition of all cells without adding any wiring harnesses, thereby effectively improving space utilization. In terms of battery balancing, this solution actively balances adjacent batteries through balancing lines to achieve an active balancing current of 2-4A. In terms of module combination, since the splicing between cells is more complete and standardized, any combination can be achieved without being affected by the structural parts on the module. In terms of data storage, this solution can realize distributed independent data storage for each cell, greatly improving data accuracy, and can provide data support for subsequent accurate diagnosis of battery faults and big data analysis. In terms of security, this solution can realize cell-level data encryption and hardware binding, which greatly improves the safety of battery system use, effectively avoids the emergence of pirated battery packs, and improves the company's ability to control the quality of its own products.

[0019] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0021] Figure 1 is a schematic diagram of the structure of a battery management system based on near-field wireless communication provided by an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of a battery management system based on near field wireless communication provided by a second embodiment of the present invention;

[0023] Figure 3 is a schematic structural diagram of a battery management system based on near-field wireless communication provided by a third embodiment of the present invention;

[0024] Figure 4 It is a specific implementation flow chart of the battery communication control method based on near-field wireless communication provided by an embodiment of the present invention.

[0025] Reference numerals:

[0026] Battery module 100 , battery cell 10 , conductive bar 11 , bracket 20 , control circuit board 30 , wireless acquisition module 40 , linear antenna 50 , battery management unit 60 , wireless receiving device 70 , top cover 80 , battery cell balancing module 90 , balancing line 91 . DETAILED DESCRIPTION

[0027] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0028] The terms "system" and "network" in the embodiments of the present invention can be used interchangeably. "Multiple" means two or more than two. In view of this, "multiple" can also be understood as "at least two" in the embodiments of the present invention. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the previous and subsequent associated objects are in an "or" relationship. In addition, it should be understood that in the description of the embodiments of the present invention, the words "first", "second", etc. are only used to distinguish the purpose of description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0029] See also Figure 1-3The embodiment of the present invention provides a battery management system based on near-field wireless communication, which is applied to a power battery pack. The power battery pack includes a plurality of battery modules 100, each battery module 100 includes a plurality of battery cells 10, and adjacent battery cells are sequentially connected through a conductive bar 11. The battery management system includes: a bracket 20, which is arranged on the top of each battery cell 10 in a one-to-one correspondence, a control circuit board 30 connected to the battery cell 10 is fixedly arranged on the bracket 20, and a wireless acquisition module 40 is arranged on the control circuit board 30; a linear antenna 50, which is arranged through the bottom of a top cover 80 of the battery module 100, and the linear antenna 50 is arranged corresponding to the wireless acquisition module 40 in a vertical direction; a wireless receiving device 70, which is arranged at one end of the linear antenna 50, and is used for wireless communication with the corresponding wireless acquisition module 40 through the linear antenna 50; a battery management unit 60, which is electrically connected to at least one wireless receiving device 70, and is used for performing corresponding communication management operations on the corresponding battery cell 10 through the wireless receiving device 70.

[0030] In a possible embodiment, a bracket 20 is provided on the top of each battery cell 10, and the bracket 20 is used to fix the control circuit board 30 to achieve physical connection between the battery cell 10 and the control circuit board 30. The bracket 20 provides a stable installation platform for the control circuit board 30 to ensure reliable connection between the control circuit board 30 and the battery cell 10. Furthermore, a wireless acquisition module 40 is integrated on the control circuit board 30, and the wireless acquisition module 40 can collect the working status of the battery cell 10 in real time, and send the data to the wireless receiving device 70 through wireless communication, so that the battery management unit 60 can monitor the battery status in time. Specifically, the wireless acquisition module 40 sends the collected working status information in the form of short-range wireless data. After the linear antenna 50 receives the short-range wireless data, it transmits it to the wireless receiving device 70. In the embodiment of the present invention, the wireless acquisition module 40 is preferably an RFID sending module, and the distance between the wireless acquisition module 40 and the linear antenna 50 is, for example, 1-3 cm.

[0031] By real-time monitoring of the operating status of the battery cell 10, potential faults can be discovered in advance and the risk of safety hazards such as overheating and short circuit can be reduced. The wireless receiving device 70 is arranged at one end of the linear antenna 50, and is used to receive signals sent by all wireless acquisition modules 40 covered by the linear antenna 50, that is, the linear antenna 50 is equivalent to the communication bus of the covered battery cell. The linear antenna 50 serves as a medium for wireless communication to ensure that the signal transmission between the wireless acquisition module 40 and the wireless receiving device 70 is stable and reliable. The battery management unit 60 is electrically connected to at least one wireless receiving device 70, and is used to receive the signal transmitted by the wireless receiving device 70 and perform corresponding management operations. The wireless receiving device 70 transmits the signal sent by the wireless acquisition module 40 to the battery management unit 60, and the battery management unit 60 performs corresponding management operations according to the received signal. Specifically, multiple wireless receiving devices 70 are connected to the battery management unit 60 through the CAN bus to communicate data with the battery management unit 60. Further, the battery management unit 60 summarizes and analyzes the information received from multiple wireless receiving devices 70 to achieve centralized management of all battery cells 10 and improve management efficiency.

[0032] In actual applications, the multiple cells 10 in the power battery pack may have voltage imbalance during the charging and discharging process due to differences in internal resistance, different degrees of aging, etc. This voltage imbalance will not only affect the overall performance of the battery pack, causing some cells 10 to reach the charging or discharging limit prematurely, but may also cause safety hazards such as overheating, expansion, or even fire.

[0033] In order to solve the above technical problems, in an embodiment of the present invention, a cell balancing module 90 is further provided on the control circuit board 30, and the cell balancing modules 90 of adjacent cell 10 are connected through a balancing line 91; the cell balancing module 90 is used to collect voltage information of the corresponding cell 10, and based on the voltage information, perform active balancing operations on the corresponding cell 10 through the balancing line 91.

[0034] In a possible implementation, each cell balancing module 90 is fixed on the control circuit board 30 and is responsible for collecting the voltage information of the corresponding cell 10. The cell balancing module 90 can monitor the voltage state of the corresponding cell 10 in real time and provide necessary data support for subsequent balancing operations. Adjacent cell balancing modules 90 are connected to each other through balancing lines 91. In a possible implementation, the battery management unit 60 monitors the imbalance between a certain cell and its adjacent cells through the cell balancing module 90. Therefore, based on the collected voltage information, the cell balancing module 90 actively adjusts the voltage through the balancing line 91, for example, actively outputs the current of the cell with a higher voltage to the cell with a lower voltage, so as to achieve the balance of the power between the cells 10 and ensure the performance consistency of the entire battery pack. In the embodiment of the present invention, since the above-mentioned active balancing operation is performed by a dedicated balancing line 91, it is possible to achieve a large current (for example, 2-4A, compared with the 1-300mA of the traditional passive balancing) battery balancing operation, which greatly improves the efficiency of battery balancing.

[0035] Furthermore, by centrally managing multiple equalization modules through the control circuit board 30, the structure of the battery management system is simplified, and the reliability and maintenance convenience of the system are improved. Through active equalization, the capacity difference between the battery cells 10 can be significantly reduced, and the overall performance and efficiency of the battery pack can be improved. And the equalization operation helps to prevent some battery cells 10 from being overcharged and discharged, reduce the aging rate, and thus extend the service life of the battery.

[0036] In actual application, although wireless transmission technology has brought convenience, it is also accompanied by a series of information security risks. For example, data theft may lead to the leakage of sensitive information, tampering will affect the integrity of data, and replay attacks can allow attackers to forge legitimate data for fraud. In addition, denial of service attacks can exhaust system resources, making it impossible for normal users to access services, and identity spoofing may allow attackers to impersonate legitimate users to perform malicious operations. These threats seriously affect the reliability and security of the system.

[0037] In order to solve the above problems, in an embodiment of the present invention, the wireless acquisition module 40 is used to: collect parameter data of the corresponding battery cell 10; perform encryption processing on the parameter data to obtain first encrypted battery cell 10 data; wirelessly transmit the first encrypted battery cell 10 data to the linear antenna 50; the linear antenna 50 transmits the first encrypted battery cell 10 data to the battery management unit 60 through the wireless receiving device 70.

[0038] In a possible implementation, the wireless acquisition module 40 is mounted on the control circuit board 30, connected to the battery cell 10, and is responsible for collecting parameter data of the battery cell 10 and performing encryption processing to ensure the security of data transmission. Through encryption processing, the wireless acquisition module 40 ensures the security of the battery cell 10 data during transmission to prevent the data from being intercepted or tampered with. The wireless acquisition module 40 wirelessly transmits the encrypted battery cell 10 data to the linear antenna 50 without the need for physical connection, thereby improving the flexibility of the system. The linear antenna 50 transmits the encrypted data to the battery management unit 60 through the wireless receiving device 70 for further processing and analysis, thereby realizing the battery management function at the battery cell level. The wireless transmission method reduces communication failures caused by wiring harness problems and improves the reliability of the battery management system. At the same time, wireless communication technology simplifies the wiring of the battery pack, facilitates the maintenance and expansion of the battery pack, and reduces the cost of system upgrades and maintenance.

[0039] Specifically, the parameter data of the battery cell 10 includes but is not limited to: voltage, (input / output) current, temperature, ROC and other data. After the corresponding battery cell 10 number is added through the wireless acquisition module 40, it is transmitted outward in the form of a wireless signal. The parameter data is encrypted before transmission to improve the security of data transmission. The wireless signal is a short-range wireless signal. The wireless acquisition module 40 is a module for wireless communication based on RFID. By adopting this short-range wireless communication, the power consumption during data transmission can be greatly reduced. At the same time, the short-range wireless communication has a higher signal reflection fault tolerance capability than the long-range wireless communication technology.

[0040] By encrypting the collected data, the security of the battery cell 10 parameter data during transmission is ensured to prevent the data from being stolen or tampered with. Wireless transmission technology makes the connection between the battery cell 10 and the management unit no longer rely on physical lines, improves the flexibility of the system layout, and facilitates application in different environments. The system can realize real-time monitoring of the battery cell 10 parameters and quickly respond to changes in battery status, thereby improving the efficiency and safety of battery use.

[0041] In an embodiment of the present invention, the battery management unit 60 is also used to: obtain the current voltage of the current battery cell 10 through the battery cell balancing module 90, and obtain the adjacent voltage of the battery cell 10 adjacent to the current battery cell 10; based on the current voltage and the adjacent voltage, determine whether there is an unbalanced condition between the current battery cell 10 and the adjacent battery cell 10; if so, output a corresponding active balancing control instruction; the battery cell balancing module 90 is also used to: perform a corresponding active balancing operation through the balancing line 91 based on the active balancing control instruction.

[0042] In a possible implementation, the cell balancing module 90 collects the voltage information of the current cell 10 and its adjacent cells 10, and sends it to the battery management unit 60. The battery management unit 60 obtains the current voltage of the cell 10 and the adjacent voltages of the adjacent cells 10 from the cell balancing module 90, and provides necessary data support for determining the voltage balance between the cells 10. Using the acquired voltage data, the battery management unit 60 can analyze the voltage difference between the cells 10 and promptly identify whether there is an unbalanced condition. When an imbalance is detected, the battery management unit 60 sends an active balancing control instruction to the cell balancing module 90, instructing it to perform specific balancing operations to adjust the voltage of the cell 10 and reduce the imbalance. By timely discovering and handling the unbalanced condition of the cell 10, the potential risks of battery overheating, expansion, etc. are reduced, and the safety of the entire battery system is improved. After receiving the control instruction, the cell balancing module 90 discharges or charges the cell 10 through the balancing line 91 to ensure that the voltage between the cells 10 reaches a predetermined balanced state.

[0043] During the installation and factory configuration of the battery pack, the battery cells are randomly fixed in the battery pack. In the prior art, a technician manually confirms the number and physical location of each battery cell and inputs them into the battery management unit 60, which results in low work efficiency. Especially in a customized battery management system, this creates great work pressure on the technicians.

[0044] In an embodiment of the present invention, the wireless acquisition module 40 is also used to: add random feature quantities to the parameter data; perform encryption operations on the parameter data and the random feature quantities to obtain second encrypted data; the battery management unit 60 is also used to: parse the second encrypted data, determine the target battery cell, obtain the physical position of the target battery cell, and establish a binding relationship between the target battery cell and the physical position.

[0045] In a possible implementation, after the battery cell 10 is installed in the battery pack, each battery cell 10 is manually controlled to perform wireless communication through the antenna in turn according to the physical installation position. During communication, the technician can control the wireless acquisition module 40 to add random feature quantities to the acquired parameter data, so that the communication data of the current battery cell is different from the communication data of other battery cells, and then the parameter data and the random feature quantities are encrypted to form the second encrypted data. In the subsequent identification process, after the battery management unit 60 receives the second encrypted data, it performs a decryption operation to extract the original parameter data and random feature quantities from it, and then determines the target battery cell. Once the target battery cell is identified, the battery management unit 60 further obtains the physical position of the battery cell and establishes a binding relationship between the target battery cell and its physical position for subsequent management and monitoring. For example, the current battery pack contains 6 battery cells 10, whose physical positions are AF in sequence, and the IDs of each battery cell 10 are 6, 3, 2, 4, 5, and 1 respectively. When determining the physical position, the battery cell 10 located at position A is first controlled, and the voltage of the battery cell 10 is increased by 1V in the communication information. As a result, the wireless receiving device 70 receives different voltage values ​​uploaded by the battery cell 10, and thus determines that the ID of the battery cell 10: 6 is located at physical position A. Based on the above principle, the physical position of each battery cell 10 can be determined in turn. This achieves rapid and accurate positioning and configuration of the physical position of each battery cell 10, greatly improving the work efficiency of technicians. At the same time, a binding relationship between the battery cell 10 and the physical position is established, so that the battery management system can accurately monitor specific batteries 10, optimize maintenance strategies, and improve management efficiency.

[0046] In actual application, the above configuration method still requires technicians to perform manual operations before leaving the factory to determine the physical position of each battery cell 10 one by one. This process is not only time-consuming and inefficient, but also prone to human errors. In addition, as the scale of battery production expands, relying on manual confirmation will become particularly cumbersome, thereby affecting the production progress and the response speed of the overall system.

[0047] In order to solve the above technical problems, in an embodiment of the present invention, the battery management unit 60 is also used to: perform a temperature increase operation on each battery cell 10 in turn; determine the battery cell with abnormal temperature based on the temperature increase operation; obtain the physical location of the battery cell with abnormal temperature; and establish a binding relationship between the battery cell with abnormal temperature and the physical location.

[0048] Preferably, the performing the temperature raising operation on each battery cell 10 in turn includes: determining a target temperature, and randomly controlling each battery cell in turn to perform a corresponding continuous discharge operation according to the target temperature; or performing a heating operation on each battery cell in turn through a preset heating device.

[0049] In the first embodiment, a technician can use a preset heating device, such as a hot air blower, to perform a heating operation on each battery cell 10 in turn according to the actual physical installation position of the battery cell 10. The battery management unit 60 determines the corresponding physical address for each temperature abnormality battery cell with temperature abnormality in turn according to a predetermined physical position allocation rule, and establishes a corresponding binding relationship, thereby realizing rapid and accurate determination of the physical position of each battery cell 10.

[0050] In the second embodiment, the above technical solution can be further optimized. Specifically, a temperature sensor is pre-configured in the battery pack, and the physical position of each temperature sensor is pre-stored in the battery management unit 60. For example, 2-4 temperature sensors are configured in the battery pack and are set in the corners of the battery pack. Then the target temperature is determined. For example, when the room temperature is 25°C, the target temperature is determined to be 30°C. At this time, each battery cell 10 is randomly controlled in sequence according to the target temperature to perform a continuous discharge operation so that its temperature gradually rises until the target temperature is reached. At this time, the physical position of the battery cell 10 is calculated by the configured temperature sensor until the physical position calculation of all battery cells 10 is completed, and then they are sorted to determine the physical position of each battery cell 10. As a result, the fully automatic physical position determination of the battery cell 10 is realized without any manual operation, thereby greatly improving the work efficiency of the technicians.

[0051] Through temperature increase and abnormality detection, the battery management unit 60 realizes real-time monitoring of the status of the battery cell 10, which helps to detect potential risks in a timely manner. Once the battery cell 10 with abnormal temperature is identified, the battery management unit 60 can issue accurate alarm information based on the physical location of the battery cell 10 to facilitate subsequent maintenance and monitoring work. In subsequent work, technicians can deeply optimize and upgrade the battery pack based on the fault monitoring data at the battery cell level to improve its performance.

[0052] See also Figure 4 Based on the same inventive concept, an embodiment of the present invention provides a battery communication control method based on near field wireless communication, which is applied to the battery management system described in the embodiment of the present invention. The method includes:

[0053] S10) collecting parameter data of each battery cell, and sending the parameter data based on near field wireless communication;

[0054] S20) receiving and storing the parameter data;

[0055] S30) generating a control instruction corresponding to the parameter data;

[0056] S40) sending the control instruction to the corresponding battery cell based on near field wireless communication.

[0057] Furthermore, an embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method described in the embodiment of the present invention is implemented.

[0058] Furthermore, an embodiment of the present invention further provides a power battery pack, wherein the power battery includes a plurality of battery modules 100 , each battery module 100 includes a plurality of battery cells 10 , and the power battery includes the battery management system described in the embodiment of the present invention.

[0059] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, the technical scheme of the embodiments of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific implementation modes can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0060] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a single-chip microcomputer, a chip or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0061] In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. A battery management system based on near-field wireless communication, applied to a power battery pack, the power battery pack comprising a plurality of battery modules (100), each battery module (100) comprising a plurality of battery cells (10), adjacent battery cells (10) being connected in sequence via a conductive bar (11), characterized in that: The battery management system comprises: A bracket (20) is arranged one-to-one on the top of each battery cell (10), a control circuit board (30) connected to the battery cell (10) is fixedly arranged on the bracket (20), and a wireless acquisition module (40) is arranged on the control circuit board (30); A linear antenna (50) is arranged to pass through the bottom of the top cover (80) of the battery module (100), and the linear antenna (50) is arranged corresponding to the wireless acquisition module (40) in the vertical direction; A wireless receiving device (70), arranged at one end of the linear antenna (50), and used for wirelessly communicating with a corresponding wireless acquisition module (40) via the linear antenna (50); A battery management unit (60) electrically connected to at least one wireless receiving device (70) and configured to perform corresponding communication management operations on a corresponding battery cell (10) via the wireless receiving device (70); The battery management unit (60) is also used for: Performing a temperature raising operation on each battery cell (10) in turn; Determining a battery cell with abnormal temperature based on the temperature raising operation; Obtaining the physical location of the battery cell with abnormal temperature; Establishing a binding relationship between the abnormal temperature battery cell and the physical location; The step of performing a temperature raising operation on each battery cell (10) in sequence comprises: determining a target temperature, and randomly controlling each battery cell (10) in sequence to perform a corresponding continuous discharge operation according to the target temperature; or A heating operation is performed on each battery cell (10) in sequence by using a preset heating device.

2. The battery management system according to claim 1, characterized in that: A cell balancing module (90) is also provided on the control circuit board (30), and the cell balancing modules (90) of adjacent cells (10) are connected via a balancing line (91); The battery cell balancing module (90) is used to collect voltage information of the corresponding battery cell (10), and based on the voltage information, perform an active balancing operation on the corresponding battery cell (10) through the balancing line (91).

3. The battery management system according to claim 1, characterized in that: The wireless acquisition module (40) is used for: Collecting parameter data of the corresponding battery cell (10); Performing encryption processing on the parameter data to obtain first encrypted battery cell (10) data; Wirelessly transmitting the first encrypted battery cell (10) data to the linear antenna (50); The linear antenna (50) transmits the first encrypted battery cell (10) data to the battery management unit (60) via the wireless receiving device (70).

4. The battery management system according to claim 2, characterized in that: The battery management unit (60) is also used for: Acquiring the current voltage of the current battery cell (10) and acquiring the adjacent voltages of the battery cells (10) adjacent to the current battery cell (10) through the battery cell balancing module (90); determining whether an unbalanced condition exists between a current battery cell (10) and an adjacent battery cell (10) based on the current voltage and the adjacent voltage; If so, output the corresponding active balance control command; The cell balancing module (90) is further used to: perform a corresponding active balancing operation through the balancing line (91) based on the active balancing control instruction.

5. The battery management system according to claim 3, characterized in that: The wireless acquisition module (40) is also used for: Adding random feature quantities to the parameter data; Performing an encryption operation on the parameter data and the random feature quantity to obtain second encrypted data; The battery management unit (60) is further used to: parse the second encrypted data, determine the target battery cell, obtain the physical location of the target battery cell, and establish a binding relationship between the target battery cell and the physical location.

6. A battery communication control method based on near field wireless communication, applied to a battery management system according to any one of claims 1 to 5, characterized in that: The method comprises: Collecting parameter data of each battery cell (10), and sending the parameter data based on near-field wireless communication; receiving and storing the parameter data; generating a control instruction corresponding to the parameter data; Sending the control instruction to the corresponding battery cell (10) based on near-field wireless communication; The battery management unit (60) is also used for: Performing a temperature raising operation on each battery cell (10) in turn; Determining a battery cell with abnormal temperature based on the temperature raising operation; Obtaining the physical location of the battery cell with abnormal temperature; Establishing a binding relationship between the abnormal temperature battery cell and the physical location; The step of performing a temperature raising operation on each battery cell (10) in sequence comprises: determining a target temperature, and randomly controlling each battery cell (10) in sequence to perform a corresponding continuous discharge operation according to the target temperature; or A heating operation is performed on each battery cell (10) in sequence by using a preset heating device.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to claim 6 is implemented.

8. A power battery pack, the power battery comprising a plurality of battery modules (100), each battery module (100) comprising a plurality of battery cells (10), characterized in that: The power battery comprises a battery management system according to any one of claims 1-5.

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