Battery cell monitoring method and device, electronic equipment and vehicle

Abstract

The invention discloses a battery cell monitoring method and device, electronic equipment and a vehicle, and relates to the technical field of data processing. The method comprises the following steps: collecting compression amount data of deformation sensors arranged in a plurality of preset areas around a battery cell; creating a relation curve of the compression amount and the expansion force according to the compression amount data and the expansion force corresponding to the compression amount data, and determining the real-time expansion force of the battery cell according to the relation curve; and monitoring the real-time expansion force of the battery cell by using an expansion force matrix established for the expansion thicknesses of the plurality of preset areas in advance. According to the method, before the real-time expansion force of the battery cell is calculated, the corresponding expansion force matrix is established according to the expansion thickness of each area of the battery cell, and then the real-time expansion force of the battery cell is obtained by calculating the relation curve of the compression amount and the expansion force in the use process of the battery cell. And the real-time expansion force is monitored through the expansion force matrix, so that the problem that the service life of the battery cell cannot be predicted in real time in the use process of the whole vehicle at present is solved.

Description

Technical Field

[0001] The present application relates to the field of data processing technology, and in particular to a battery cell monitoring method, device, electronic equipment and vehicle. Background Art

[0002] The current traditional battery life warning solution is to estimate the battery life and diving point through a series of calculations based on current, voltage, state of charge, temperature and other signals. However, this method usually calculates based on relevant data after the battery life ends, rather than effectively identifying the expansion problems and expansion risks that are prone to occur during the battery cycle during use. Therefore, there is a problem that the battery life cannot be predicted in real time during the use of the entire vehicle. Summary of the invention

[0003] In view of this, the present application provides a battery cell monitoring method, device, electronic device and vehicle, which can solve the current problem of being unable to predict the battery cell life in real time during the use of the entire vehicle.

[0004] In a first aspect, the present application provides a battery cell monitoring method, comprising:

[0005] Collecting compression data of deformation sensors disposed in a plurality of preset areas around the battery cell; wherein the plurality of preset areas are obtained by pre-dividing the contact surface between the battery cell and the deformation sensor;

[0006] Creating a relationship curve between compression and expansion force based on the compression data and the expansion force corresponding to the compression data, and determining the real-time expansion force of the battery cell through the relationship curve;

[0007] The real-time expansion force of the battery cell is monitored by using an expansion force matrix established in advance for the expansion thicknesses of a plurality of preset areas.

[0008] In a second aspect, the present application provides a battery cell monitoring device, comprising:

[0009] A collection unit is configured to collect compression data of deformation sensors arranged in a plurality of preset areas around the battery cell; wherein the plurality of preset areas are obtained by pre-dividing the contact surface between the battery cell and the deformation sensor;

[0010] a calculation unit configured to create a relationship curve between compression and expansion force based on the compression data and the expansion force corresponding to the compression data, and determine the real-time expansion force of the battery cell through the relationship curve;

[0011] The processing unit is configured to monitor the real-time expansion force of the battery cell by using an expansion force matrix established in advance for the expansion thickness of a plurality of preset areas.

[0012] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the battery cell monitoring method described in the first aspect is implemented.

[0013] In a fourth aspect, the present application provides an electronic device, comprising a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the processor implements the battery cell monitoring method described in the first aspect when executing the computer program.

[0014] In a fifth aspect, the present application provides a vehicle, comprising the battery cell monitoring device as mentioned in the second aspect or the electronic device as mentioned in the fourth aspect.

[0015] By means of the above technical scheme, the present application provides a method, device, electronic device and vehicle for monitoring a battery cell. First, the compression data of the deformation sensor set in multiple preset areas around the battery cell are collected; wherein, these multiple preset areas are obtained by pre-dividing the contact surface between the battery cell and the deformation sensor. Then, based on the compression data of each preset area obtained and the expansion force corresponding to the compression data, the relationship curve between the compression amount and the battery cell expansion force is calculated, and the real-time expansion force of the battery cell is determined through the relationship curve. Then, according to the expansion force matrix established in advance for the expansion thickness of multiple preset areas, the real-time expansion force of the battery cell is monitored. Compared with the related art, the present application establishes a corresponding expansion force matrix according to the expansion thickness of each area of ​​the battery cell before calculating the real-time expansion force of the battery cell. Then, during the use of the battery cell, the real-time expansion force of the battery cell is obtained by calculating the relationship curve between the compression amount and the expansion force, and then the real-time expansion force is monitored through the expansion force matrix, thereby solving the problem that the battery cell life cannot be predicted in real time during the use of the whole vehicle.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of a process flow of a battery cell monitoring method provided in an embodiment of the present application is shown;

[0020] Figure 2 A schematic diagram of a process flow of another battery cell monitoring method provided in an embodiment of the present application is shown;

[0021] Figure 3 A schematic diagram of a preset area of ​​a battery cell provided in an embodiment of the present application is shown;

[0022] Figure 4 A schematic diagram showing the relationship between stress and compression provided in an embodiment of the present application is shown;

[0023] Figure 5 A schematic structural diagram of a battery cell monitoring device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] In order to be able to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In addition, in order to be able to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings, and the attached drawings are only for reference purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided by multiple details. However, in the absence of these details, one or more embodiments can still be implemented. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0025] The battery cell monitoring method provided in this embodiment can be applied to battery cell monitoring devices or electronic devices, such as vehicle-mounted domain controllers, etc. It can be integrated with a device responsible for handling intra-domain / inter-domain communications in the vehicle, or a separate processor can be set. It is not limited to communications within the automotive field, and the battery cell monitoring method provided in this embodiment can be used in the testing process of various hardware devices that need to use application programs.

[0026] In order to solve the problem that it is currently impossible to predict the life of a battery cell in real time during the use of the vehicle, this embodiment proposes a battery cell monitoring method. Figure 1 As shown, the method includes:

[0027] S101, collecting compression data of deformation sensors disposed in a plurality of preset areas around the battery cell.

[0028] First, the deformation sensor can be an aerogel film sensor. In the process of monitoring the battery cell, a thin film sensor with deformation properties, such as aerogel, is usually used to measure the expansion force of the battery cell. It can also be a thin film sensor with a spring expansion function, or a thin film sensor combined with some deformation material to reflect the expansion force of the battery cell through the deformation material or spring expansion. In this embodiment, the compression data refers to the deformation amount of the deformation sensor.

[0029] Furthermore, multiple preset areas are obtained by pre-dividing the contact surface between the battery cell and the deformation sensor. The pre-division method may be, for example, using a certain cross-section as the contact surface and dividing the cross-section into equal parts into the preset areas; or the entire side cross-section of the battery cell and the deformation sensor may be unfolded as the contact surface and the entire side cross-section may be equally divided into the preset areas. The method may be selected according to the specific situation.

[0030] S102, creating a relationship curve between compression amount and expansion force based on the compression amount data and the expansion force corresponding to the compression amount data, and determining the real-time expansion force of the battery cell through the relationship curve.

[0031] Through the compression data (referred to as compression), the expansion force of the battery cell corresponding to the compression can be calculated, and after calculating multiple compression data, the relationship curve between the compression and the expansion force can be obtained, thereby obtaining the real-time expansion force of the battery cell. It should be noted that since the expansion force may change in real time, there may be a slight error in the expansion force of the same compression. Therefore, the relationship curve between the compression and the expansion force can be corrected through subsequent compression sampling points, so that the curve is more accurate and the monitoring of the battery cell is more accurate.

[0032] S103, monitoring the real-time expansion force of the battery cell by using an expansion force matrix established in advance for the expansion thicknesses of a plurality of preset areas.

[0033] The expansion force matrix here refers to the risk data corresponding to the battery cell under various expansion force states. It is established in advance based on a large number of battery cell expansion force and expansion force threshold data experiments after multiple experimental data measurements are performed on other battery cells before monitoring the battery cell. It can provide the maximum expansion force threshold that can be tolerated under a certain expansion force condition and the corresponding risk data, which is used to determine whether the current battery cell has risks during actual battery cell monitoring. The preset area here is consistent with the method of selecting the preset area mentioned above. The expansion force matrix can be established according to a certain side section or the entire side section of the battery cell.

[0034] In this embodiment, the compression data of multiple preset areas around the battery cell are first collected; wherein, these multiple preset areas are obtained by pre-dividing the contact surface between the battery cell and the deformation sensor. Then, based on the compression data of each preset area obtained, the relationship curve between the compression and the battery cell expansion force is calculated, and the real-time expansion force of the battery cell is determined through the relationship curve. Then, according to the expansion force matrix established in advance for multiple preset areas, the real-time expansion force of the battery cell is monitored. Compared with the related art, before calculating the real-time expansion force of the battery cell, this embodiment establishes a corresponding expansion force matrix according to the expansion thickness of each area of ​​the battery cell, and then during the use of the battery cell, the real-time expansion force of the battery cell is obtained by calculating the relationship curve between the compression and the expansion force, and then the real-time expansion force is monitored through the expansion force matrix, thereby solving the current problem that the battery cell life cannot be predicted in real time during the use of the whole vehicle.

[0035] It should be noted that the current traditional battery life warning scheme estimates the battery life and diving point through a series of calculations using signals such as current, voltage, state of charge, and temperature, but the expansion problem and the corresponding risk in the battery cell cycle process cannot be effectively identified by the above signals. Secondly, it is also impossible to predict the battery cell life problem in real time through expansion during the use of the whole vehicle at this stage. This embodiment provides a real-time prediction strategy for the battery cell life by calculating the battery cell expansion amount, and compares it with the expansion thickness change matrix of the battery cell offline stage (the battery cell life ends or is close to end), that is, the expansion force matrix, to analyze the expansion changes during the use of the whole vehicle in real time, and issue an alarm when it exceeds the set threshold, thereby solving the problem that the battery cell life cannot be predicted in real time during the use of the whole vehicle.

[0036] Optionally, compression data of deformation sensors arranged in multiple preset areas around the battery cell are collected, including: using the deformation sensor wrapped around the battery cell, taking a side cross-section of the battery cell and the deformation sensor as the contact surface, dividing the contact surface to obtain multiple preset areas; or using the deformation sensor wrapped around the battery cell, taking the side unfolded surface of the battery cell in contact with the deformation sensor as the contact surface, dividing the contact surface to obtain multiple preset areas.

[0037] Optionally, the deformation sensor is integrated with an aerogel and a thin film sensor.

[0038] In this embodiment, the aerogel and the thin film sensor are integrated and wrapped around the battery cell. Since the compression curve of the aerogel is fixed, the aerogel gradually deforms as the middle part expands after the battery cell is cycled and aged. The amount of expansion force can be known by the deformation. In addition, the aerogel also has a thermal protection function. At the same time, the division of the preset area can include a variety of situations. For example, when the aerogel thin film sensor wraps around the battery cell, one of the side sections is used as a contact surface to divide the side interface to obtain multiple preset areas, that is, to focus on monitoring a single side. It is also possible to select the entire side section in contact with the aerogel thin film sensor as the contact surface, divide the entire side section, and obtain multiple preset areas, so that the monitoring of the expansion force is more comprehensive.

[0039] Optionally, a relationship curve between compression and expansion force is created using compression data and the expansion force corresponding to the compression data, including: obtaining a deformation coefficient of the deformation sensor; calculating the expansion force corresponding to each of multiple preset areas based on the compression data and the deformation coefficient; and creating a relationship curve between compression and expansion force.

[0040] In this embodiment, taking the aerogel film sensor as an example, the deformation coefficient is the deformation coefficient of the aerogel, and then the expansion force corresponding to each of the multiple preset areas is calculated based on the compression data and the deformation coefficient, and based on the relationship between the two, a relationship curve between the compression amount and the expansion force is established to monitor the subsequent expansion force.

[0041] Optionally, the real-time expansion force of the battery cell is monitored using an expansion force matrix pre-established for the expansion thickness of multiple preset areas, including: obtaining an expansion force threshold corresponding to the expansion force corresponding to the current battery cell compression data based on the expansion force matrix; and monitoring the real-time expansion force of the battery cell based on the relationship between the current expansion force and the expansion force threshold.

[0042] In this embodiment, the expansion force matrix is ​​pre-established based on a large number of battery cell expansion force and expansion force threshold data experiments before monitoring the battery cell. It can provide the maximum expansion force threshold that can be tolerated under a certain expansion force condition and the corresponding risk data, which is used to determine whether the current battery cell has risks during actual battery cell monitoring.

[0043] Optionally, obtaining an expansion force threshold corresponding to the expansion force corresponding to the current battery cell compression data based on the expansion force matrix includes: inputting the current battery cell compression data into a pre-established expansion force matrix to obtain the expansion force threshold corresponding to the current battery cell compression data.

[0044] In this embodiment, the maximum expansion force threshold that can be tolerated under a certain expansion force condition and the corresponding risk data can be obtained through the expansion force matrix. That is, during the monitoring process, on the one hand, the expansion force is calculated by the compression through the compression-expansion-force relationship curve; and then the compression (or the corresponding expansion force data) is input into the expansion force matrix to obtain the expansion force threshold corresponding to the compression, and then determine whether the battery cell is at risk based on the relationship between the expansion force and the expansion force threshold.

[0045] Optionally, the real-time expansion force of the battery cell is monitored based on the relationship between the current expansion force and the expansion force threshold, including: when the expansion force corresponding to the current compression of the battery cell is greater than the expansion force threshold, judging the current risk level to be high and issuing a warning; when the expansion force corresponding to the current compression of the battery cell is less than or equal to the expansion force threshold, judging the current risk level to be low and continuing to monitor the battery cell.

[0046] In this embodiment, if the expansion force corresponding to the current battery cell compression is greater than the expansion force threshold, the current risk level is judged to be high, indicating that the battery cell is working abnormally, indicating that there is a risk of excessive local pressure in this area of ​​the battery cell, and this area is very likely to have excessive byproducts or lithium deposition, and it is recommended to report for repair. Otherwise, continue monitoring. This ensures that the battery cell can be monitored in real time when the battery cell is in working condition to ensure safe operation.

[0047] Next, we will take the aerogel film sensor as an example to explain the actual monitoring process. Figure 2 As shown, another battery cell monitoring method provided by this embodiment is shown, including:

[0048] S201, selecting a preset area, and establishing an expansion force matrix based on battery cell expansion force threshold experimental data.

[0049] First, it is necessary to determine the selection of the preset area. In this embodiment, aerogel and thin film sensors are integrated, and then the battery cell is wrapped and covered to detect the deformation. Therefore, a side section of the battery cell and the deformation thin film sensor can be selected as the contact surface, and then the contact surface is divided to obtain multiple preset areas. Alternatively, the side unfolded surface of the battery cell in contact with the deformation thin film sensor is used as the contact surface, and the contact surface is divided to obtain multiple preset areas.

[0050] like Figure 3 The several gray grids on the left half are the expanded view of the entire side section of the contact around the battery cell. The expanded side surface of the battery cell in contact with the deformation film sensor is used as the contact surface, and the contact surface is then divided into several grids to obtain multiple preset areas.

[0051] Further, in Figure 3In FIG. 1 , X and N are respectively taken as two sampling points, wherein the compression amount at X is 6%, and the compression amount at N is 2%, that is, deformation occurs in both. According to the compression amount, the corresponding expansion force can be calculated later.

[0052] S202, using an aerogel film sensor wrapped around the battery cell, collecting compression data of multiple preset areas around the battery cell.

[0053] Then, in each preset area, the corresponding compression data will be collected, and the expansion force of each corresponding area of ​​the battery cell will be further calculated through the compression. The aerogel film sensor has good sealing and deformability, and also has a thermal protection effect. In addition, other materials with deformable materials can also be integrated with the film sensor, not limited to aerogel.

[0054] S203, calculating a relationship curve between compression and expansion force through the compression data, and obtaining real-time expansion force through the relationship curve.

[0055] The relationship curve between compression and expansion force is shown in Figure 4 As shown, the horizontal axis is stress (expansion force), the unit is MPa, and the vertical axis is compression rate (compression data). It can be seen that a one-to-one correspondence is established between the compression and expansion force through the relationship curve between the two, that is, as long as the current compression data is collected, the corresponding expansion force can be obtained.

[0056] It is worth noting that since the expansion force may change in real time, the same compression expansion force may have slight errors. Therefore, the relationship curve between compression and expansion force can be corrected through subsequent compression sampling points, making the curve more precise and the monitoring of the battery cell more accurate.

[0057] S204, inputting the current compression data into the expansion force matrix to obtain the expansion force threshold corresponding to the compression data.

[0058] The expansion force matrix can be used to obtain the maximum expansion force threshold that can be tolerated under a certain expansion force condition and the corresponding risk data. That is, during the monitoring process, on the one hand, the expansion force is calculated by the compression amount through the compression-expansion force relationship curve; and then the compression amount (or the corresponding expansion force data) is input into the expansion force matrix to obtain the expansion force threshold corresponding to the compression amount, and then determine whether the battery cell has a risk based on the relationship between the expansion force and the expansion force threshold.

[0059] S205, judging whether the real-time expansion force is greater than the expansion force threshold. If so, proceed to S2061; if not, proceed to S2062.

[0060] S2061, issues a warning that there is a risk of life span reduction or lithium deposition.

[0061] S2062, no risk, continue monitoring.

[0062] If the expansion force corresponding to the current compression of the battery cell is greater than the expansion force threshold, the current risk level is judged to be high, indicating that the working condition of the battery cell is abnormal, indicating that there is a risk of excessive local pressure in this area of ​​the battery cell, and this area is very likely to have excessive byproducts or lithium precipitation, and it is recommended to report a repair. Otherwise, continue monitoring. Thereby ensuring that the battery cell can be monitored in real time when the battery cell is in working condition to ensure safe operation. Compared with the related art, this embodiment establishes a corresponding expansion force matrix according to the expansion thickness of each area of ​​the battery cell before calculating the real-time expansion force of the battery cell. Furthermore, during the use of the battery cell, the real-time expansion force of the battery cell is obtained by calculating the relationship curve between the compression amount and the expansion force, and then the real-time expansion force is monitored through the expansion force matrix, thereby solving the current problem that the battery cell life cannot be predicted in real time during the use of the whole vehicle.

[0063] Further, as Figures 1 to 4 The specific implementation of the method shown in the embodiment provides a battery cell monitoring device, such as Figure 5 As shown, the device includes: a collection unit 501, a calculation unit 502 and a processing unit 503.

[0064] The collecting unit 501 is configured to collect compression data of deformation sensors arranged in a plurality of preset areas around the battery cell; wherein the plurality of preset areas are obtained by pre-dividing the contact surface between the battery cell and the deformation sensor;

[0065] The calculation unit 502 is configured to create a relationship curve between compression and expansion force based on the compression data and the expansion force corresponding to the compression data, and determine the real-time expansion force of the battery cell through the relationship curve;

[0066] The processing unit 503 is configured to monitor the real-time expansion force of the battery cell by using an expansion force matrix established in advance for expansion thicknesses of a plurality of preset areas.

[0067] In a specific application scenario, the acquisition unit 501 is specifically configured to use a deformation sensor wrapped around the battery cell, take a side cross-section of the battery cell and the deformation sensor as the contact surface, divide the contact surface, and obtain the multiple preset areas; or use a deformation sensor wrapped around the battery cell, take the side unfolded surface of the battery cell in contact with the deformation sensor as the contact surface, divide the contact surface, and obtain the multiple preset areas.

[0068] In a specific application scenario, the calculation unit 502 is further configured to obtain a deformation coefficient of the deformation sensor; calculate the expansion force corresponding to each of the plurality of preset areas based on the compression data and the deformation coefficient; and create a relationship curve between the compression and the expansion force.

[0069] In a specific application scenario, the processing unit 503 is further configured to obtain an expansion force threshold corresponding to the expansion force corresponding to the current battery cell compression data based on the expansion force matrix; and monitor the real-time expansion force of the battery cell based on the relationship between the current expansion force and the expansion force threshold.

[0070] In a specific application scenario, the processing unit 503 is further configured to input the compression data of the current battery cell into the pre-established expansion force matrix to obtain the expansion force threshold corresponding to the compression data of the current battery cell.

[0071] In a specific application scenario, the processing unit 503 is further configured to, when the expansion force corresponding to the current battery cell compression is greater than the expansion force threshold, judge the current risk level to be high and issue a warning prompt; when the expansion force corresponding to the current battery cell compression is less than or equal to the expansion force threshold, judge the current risk level to be low and continue to monitor the battery cell.

[0072] It should be noted that for other corresponding descriptions of the functional units involved in the battery cell monitoring device provided in this embodiment, reference can be made to Figures 1 to 4 The corresponding description in will not be repeated here.

[0073] Based on the above Figures 1 to 4 The method shown in the embodiment also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned Figures 1 to 4 The method shown.

[0074] Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, USB flash drive, mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of the present application.

[0075] Based on the above Figures 1 to 4 The method shown, and Figure 5 In order to achieve the above-mentioned purpose, the embodiment of the present application further provides an electronic device, which can be configured on a computer side or a vehicle side, etc. The device includes a storage medium and a processor; the storage medium is used to store a computer program; the processor is used to execute the computer program to achieve the above-mentioned Figures 1 to 4 The method shown.

[0076] Based on the above electronic device, the embodiment of the present application further provides a vehicle, which may specifically include: Figure 5 The device shown in the figure or the electronic device as described above. The vehicle can be a new energy vehicle or a traditional vehicle.

[0077] Optionally, the above-mentioned physical device may also include a user interface, a network interface, a camera, a radio frequency (RF) circuit, a sensor, an audio circuit, a WI-FI module, etc. The user interface may include a display, an input unit such as a keyboard, etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (such as a WI-FI interface), etc.

[0078] Those skilled in the art will appreciate that the above-mentioned physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or a combination of certain components, or different arrangements of components.

[0079] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the above-mentioned physical device, and supports the operation of the information processing program and other software and / or programs. The network communication module is used to realize the communication between the components inside the storage medium, and the communication with other hardware and software in the information processing physical device.

[0080] Through the description of the above implementation methods, the technicians in this field can clearly understand that the present application can be implemented by means of software plus the necessary general hardware platform, or by hardware. Applying the scheme of this embodiment, first collect the compression data of multiple preset areas around the battery cell; wherein, these multiple preset areas are obtained by pre-dividing the contact surface between the battery cell and the deformation sensor. Then, based on the compression data of each preset area obtained, the relationship curve between the compression and the battery cell expansion force is calculated, and the real-time expansion force of the battery cell is determined by the relationship curve. Then, according to the expansion force matrix established in advance for multiple preset areas, the real-time expansion force of the battery cell is monitored. Compared with the related art, before calculating the real-time expansion force of the battery cell, the present application establishes a corresponding expansion force matrix according to the expansion thickness of each area of ​​the battery cell, and then during the use of the battery cell, the real-time expansion force of the battery cell is obtained by calculating the relationship curve between the compression and the expansion force. Then, the real-time expansion force is monitored by the expansion force matrix, thereby solving the problem that the battery cell life cannot be predicted in real time during the use of the whole vehicle.

[0081] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0082] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features of the present application.

[0083] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0084] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0085] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A battery cell monitoring method, characterized in that: include: Collecting compression data of deformation sensors disposed in a plurality of preset areas around the battery cell; wherein the plurality of preset areas are obtained by pre-dividing the contact surface between the battery cell and the deformation sensor; Creating a relationship curve between compression and expansion force based on the compression data and the expansion force corresponding to the compression data, and determining the real-time expansion force of the battery cell through the relationship curve; The real-time expansion force of the battery cell is monitored by using an expansion force matrix established in advance for the expansion thicknesses of a plurality of preset areas.

2. The method according to claim 1, characterized in that The collecting of compression data of deformation sensors disposed in a plurality of preset areas around the battery cell includes: Using a deformation sensor wrapped around a battery cell, taking a side section of the battery cell and the deformation sensor as the contact surface, dividing the contact surface to obtain the plurality of preset areas; or, By using a deformation sensor wrapped around a battery cell, the side unfolded surface of the battery cell in contact with the deformation sensor is used as the contact surface, and the contact surface is divided to obtain the plurality of preset areas.

3. The method according to claim 1, characterized in that Creating a relationship curve between compression and expansion force using the compression data and the expansion force corresponding to the compression data, including: Obtaining the deformation coefficient of the deformation sensor; Calculating the expansion force corresponding to each of the plurality of preset areas based on the compression data and the deformation coefficient; A curve of the relationship between the compression amount and the expansion force is created.

4. The method according to claim 1, characterized in that: The method of monitoring the real-time expansion force of the battery cell by using an expansion force matrix established in advance for the expansion thicknesses of a plurality of preset areas comprises: According to the expansion force matrix, obtaining an expansion force threshold value corresponding to the expansion force corresponding to the current battery cell compression data; The real-time expansion force of the battery cell is monitored according to the relationship between the current expansion force and the expansion force threshold.

5. The method according to claim 4, characterized in that According to the expansion force matrix, the expansion force threshold corresponding to the expansion force corresponding to the current battery cell compression data is obtained, including: The compression data of the current battery cell is input into the pre-established expansion force matrix to obtain the expansion force threshold value corresponding to the compression data of the current battery cell.

6. The method according to claim 4, characterized in that The monitoring of the real-time expansion force of the battery cell according to the relationship between the current expansion force and the expansion force threshold comprises: When the expansion force corresponding to the current battery cell compression amount is greater than the expansion force threshold, the current risk level is judged to be high, and a warning prompt is issued; When the expansion force corresponding to the current compression amount of the battery cell is less than or equal to the expansion force threshold, it is determined that the current risk level is low, and the battery cell continues to be monitored.

7. A battery cell monitoring device, characterized in that: include: A collection unit is configured to collect compression data of deformation sensors arranged in a plurality of preset areas around the battery cell; wherein the plurality of preset areas are obtained by pre-dividing the contact surface between the battery cell and the deformation sensor; a calculation unit configured to create a relationship curve between compression and expansion force based on the compression data and the expansion force corresponding to the compression data, and determine the real-time expansion force of the battery cell through the relationship curve; The processing unit is configured to monitor the real-time expansion force of the battery cell by using an expansion force matrix established in advance for the expansion thickness of a plurality of preset areas.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

9. An electronic device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 6 is implemented.

10. A vehicle, characterized in that: include: The device as claimed in claim 7 or the electronic device as claimed in claim 9.

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