Formation method, battery, electronic equipment and computer readable storage medium

Abstract

The invention provides a formation method, a battery, electronic equipment and a computer readable storage medium, at least two battery cells are charged respectively, and the charging process comprises at least two charging stages; recording formation process parameters of each battery cell in the target charging stage; based on the formation process parameters, determining a target battery cell with abnormal capacity in the at least two battery cells; and carrying out supplementary charging or discharging on the target battery cell to complete the formation process of the at least two battery cells, so that the efficiency of obtaining the battery cells of which the capacities meet the consistency requirement can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a formation method, a battery, an electronic device and a computer readable storage medium. BACKGROUND

[0002] With the development of science and technology, the requirements for high energy density and long cycle life of lithium batteries are becoming higher and higher. Factors affecting the high energy density and long cycle life of lithium batteries include the consistency of the cells in the battery.

[0003] In order to ensure the consistency of the cells in the battery, the cells are usually screened during the cell capacity matching process to obtain cells whose capacity does not meet the consistency requirements, and the cells whose capacity does not meet the consistency requirements are returned to the formation process for formation, which is low in efficiency. SUMMARY

[0004] Embodiments of the present application provide a formation method, a battery, an electronic device and a computer readable storage medium, which can solve the technical problem of low efficiency in obtaining cells whose capacity meets the consistency requirements.

[0005] In a first aspect, embodiments of the present application provide a formation method, comprising:

[0006] charging at least two cells respectively, wherein the charging process comprises at least two charging stages;

[0007] recording formation process parameters of each of the cells in a target charging stage;

[0008] determining a target cell with abnormal capacity among the at least two cells based on the formation process parameters;

[0009] supplementarily charging or discharging the target cell to complete the formation process of the at least two cells.

[0010] In an embodiment, the formation process parameters include at least one of time consumed in the target charging stage, capacity of the cell and temperature of the target charging stage.

[0011] In an embodiment, the determining of the target cell with abnormal capacity among the at least two cells based on the formation process parameters comprises:

[0012] performing clustering processing on the cells based on the formation process parameters to obtain cell clusters and cells outside the cell clusters;

[0013] determining the cells outside the cell clusters as the target cell with abnormal capacity.

[0014] In an embodiment, the clustering of the battery cells based on the formation process parameters comprises:

[0015] The clustering of the battery cells based on the formation process parameters comprises:

[0016] In an embodiment, the supplementary charging or discharging of the target battery cell comprises:

[0017] obtaining a center battery cell of the battery cell cluster;

[0018] determining a target capacity that needs to be supplemented or released by the target battery cell based on the capacity of the center battery cell of the battery cell cluster and the current capacity of the target battery cell.

[0019] In an embodiment, before the center battery cell of the battery cell cluster is obtained, the method further comprises:

[0020] fitting the formation process parameters of the battery cell cluster;

[0021] determining the center battery cell of the battery cell cluster based on the fitting result.

[0022] In an embodiment, the charging of the at least two battery cells comprises:

[0023] charging the at least two battery cells in a first charging stage at a preset current until the voltage of each battery cell reaches a preset voltage threshold;

[0024] charging each battery cell in a second charging stage at a preset voltage until the time of the second charging stage reaches a preset time.

[0025] In a second aspect, an embodiment of the present application provides a lithium battery, which comprises the battery cell provided by the embodiment.

[0026] In a third aspect, an embodiment of the present application further provides an electronic device, which comprises a memory storing a plurality of instructions; and a processor loading the instructions from the memory to execute any one of the formation methods provided by the embodiments of the present application.

[0027] In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium, which stores a plurality of instructions, and the instructions are adapted to be loaded by a processor to execute any one of the formation methods provided by the embodiments of the present application.

[0028] The embodiments of the present application have the following beneficial effects:

[0029] In the embodiments of the present application, at least two battery cells are charged respectively, the charging process includes at least two charging stages, the formation process parameters of each battery cell in the first charging stage are recorded, the target battery cell with abnormal capacity among the at least two battery cells is determined based on the formation process parameters, and the target battery cell is subjected to supplementary charging or discharging to complete the formation process of the at least two battery cells, so that the battery cells are subjected to supplementary charging or discharging in the formation process, thereby ensuring that the capacities of the battery cells meet the consistency requirement at the end of the formation process, and the battery cells with capacities not meeting the consistency requirement are not found and returned to the formation process until the capacity grading process, the efficiency of obtaining the battery cells with capacities meeting the consistency requirement is improved, and the technical problem of low efficiency of obtaining the battery cells with capacities meeting the consistency requirement is solved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 is a schematic diagram of the formation method provided by the embodiments of the present application;

[0032] Figure 2 is a schematic diagram of the target battery cell provided by the embodiments of the present application;

[0033] Figure 3 is a schematic diagram of the target capacity provided by the embodiments of the present application;

[0034] Figure 4 is a schematic diagram of the target battery cell subjected to supplementary charging or discharging provided by the embodiments of the present application;

[0035] Figure 5 is a schematic diagram of the electronic device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application. In addition, it should be understood that the specific implementation manners described herein are only used for illustrating and explaining the present application, and are not used for limiting the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the drawing plane direction in the drawings; and "inner" and "outer" refer to the contour of the device.

[0037] The following will be described in detail with reference to the drawings. It should be noted that the sequence of the following embodiment descriptions is not used to limit the preferred sequence of the embodiments. Although the logical sequence is shown in the flowcharts, in some cases, the steps shown or described can be performed in different sequences from the sequence shown in the drawings.

[0038] In the present embodiment, a terminal is taken as an example for description, and the present embodiment provides a formation method, as shown in the figure, the specific process of the formation method can be as follows: Figure 1

[0039] 101, charge at least two battery cells respectively, the charging process includes at least two charging stages.

[0040] Wherein, the battery cell is the basic component unit of the battery, which at least includes a positive electrode, a negative electrode, a separator and an electrolyte. The type of the battery can be set according to the actual situation, for example, the battery can be a lithium battery or a lead-acid battery, and the present embodiment does not limit it. The charging process of each battery cell includes at least two charging stages, for example, the charging process of each battery cell can include two charging stages or three charging stages, and the present embodiment does not limit it. When the charging process of each battery cell includes two charging stages, the two charging stages can include a constant current charging stage and a constant voltage charging stage, at this time, the at least two battery cells are charged respectively, including:

[0041] According to the preset current, the first charging stage of the at least two battery cells is charged respectively until the voltage of each battery cell reaches the preset voltage threshold value;

[0042] According to the preset voltage, the second charging stage of each battery cell is charged respectively until the time of the second stage charging reaches the preset time.

[0043] ​The preset current is a preset constant current. The preset voltage is a preset constant voltage. The first charging stage charging is a constant current charging stage, and the second charging stage charging is a constant voltage charging stage. The preset voltage threshold can be set according to actual conditions, and is not limited in the embodiment. The preset time can be set according to actual conditions. Alternatively, when each battery cell is charged in the second charging stage according to the preset voltage, the second charging stage charging can also be stopped when the current of the battery cell decreases to a preset current value.

[0044] In the embodiment, each of the at least two battery cells is charged in the first charging stage according to the preset current until the voltage of each battery cell reaches the preset voltage threshold, and each battery cell is charged in the second charging stage according to the preset voltage until the time of the second stage charging reaches the preset time, so that a stable solid electrolyte interphase (SEI) film is formed on the negative electrode surface of the battery cell, and the stable solid electrolyte interphase film can be formed on the negative electrode surface of the battery cell without a pre-charging stage, and the efficiency of forming the stable solid electrolyte interphase film on the negative electrode surface of the battery cell is improved.

[0045] When the charging process of each battery cell includes three charging stages, the three charging stages can include a pre-charging stage, a constant current charging stage and a constant voltage charging stage. At this time, the at least two battery cells are charged respectively, including:

[0046] The at least two battery cells are charged in the pre-charging stage according to the first preset current until the voltage of each battery cell reaches the first preset voltage threshold;

[0047] The at least two battery cells are charged in the first charging stage according to the second preset current until the voltage of each battery cell reaches the second preset voltage threshold;

[0048] Each battery cell is charged in the second charging stage according to the preset voltage until the time of the second stage charging reaches the preset time.

[0049] The first preset current is less than the second preset current, and the first preset voltage threshold and the second preset voltage threshold can be set according to actual conditions, and are not limited in the embodiment. The preset time can be set according to actual conditions. Alternatively, when each battery cell is charged in the second charging stage according to the preset voltage, the second charging stage charging can also be stopped when the current of the battery cell decreases to a preset current value.

[0050] In the embodiment, the at least two battery cells are charged in the pre-charging phase according to the first preset current until the voltage of each battery cell reaches the first preset voltage threshold, are charged in the first charging phase according to the second preset current until the voltage of each battery cell reaches the second preset voltage threshold, and are charged in the second charging phase according to the preset voltage until the time of the second charging phase reaches the preset time, so that a stable solid electrolyte interface film is formed on the negative electrode surface of the battery cell through the three charging phases, the generation of the solid electrolyte interface film can be more uniformly promoted, and the local overheating risk can be reduced due to the small first preset current.

[0051] Optionally, before the at least two battery cells are charged, the at least two battery cells can be placed in the formation cabinet, and the at least two battery cells are charged by the formation cabinet.

[0052] 102、record the formation process parameters of each battery cell in the target charging phase.

[0053] The target charging phase can be any one of the at least two charging phases. Optionally, the target charging phase can be a charging phase in which the formation process parameters change obviously, such as the temperature rises sharply. For example, the target charging phase can be the first charging phase, or when the pre-charging phase exists, the target charging phase can be the pre-charging phase or the first charging phase. When the target charging phase is the first charging phase, the change of the formation process parameters in the first charging phase is more obvious, so when the target charging phase is the first charging phase, the target battery cell with abnormal capacity determined based on the formation process parameters is more accurate.

[0054] The formation process parameters refer to parameters related to charging of the battery cell in the target charging phase, which can be set according to actual conditions. For example, the formation process parameters include at least one of the time consumed by the target charging phase, the capacity of the battery cell, and the temperature of the target charging phase. The temperature of the target charging phase can be understood as the temperature of the battery cell at the end of the target charging phase, or can also refer to the average temperature of the battery cell in the target charging phase. The capacity of the battery cell refers to the capacity of the battery cell at the end of the target charging phase. Optionally, the formation process parameters can be recorded by the formation cabinet.

[0055] 103、determine a target battery cell with abnormal capacity in the at least two battery cells based on the formation process parameters.

[0056] In the process of charging the at least two battery cells by the formation cabinet, theoretically, the capacity of each battery cell is the same at the end of charging, but due to the difference in equipment points of the formation cabinet or the influence of temperature difference, the capacity of each battery cell at the end of charging may be different. Therefore, it is necessary to repair the battery cell with abnormal capacity to ensure the consistency of the capacity of different battery cells.

[0057] In some embodiments, based on the formation process parameters, the target battery cell with abnormal capacity in the at least two battery cells is determined, including:

[0058] Based on the formation process parameters, the battery cells are clustered to obtain a battery cell cluster and a battery cell outside the battery cell cluster;

[0059] The battery cell outside the battery cell cluster is determined as the target battery cell with abnormal capacity.

[0060] If a battery cell is outside the battery cell cluster, it means that the capacity of the battery cell is abnormal, and the battery cell can be determined as the target battery cell. After clustering the battery cells, a center battery cell can be obtained, and a battery cell with a Euclidean distance greater than or equal to a preset distance from the center battery cell is determined as a battery cell outside the battery cell cluster.

[0061] In the related art, the voltage of the battery cell can be detected, and if the voltage of the battery cell does not meet the preset voltage value, the battery cell is determined as the battery cell with abnormal capacity. However, due to various factors, the detected voltage may be incorrect, resulting in the inability to screen the battery cell with abnormal capacity from the battery cell, and the battery cell with abnormal capacity needs to be returned to the formation process for formation until the battery cell with abnormal capacity is found in other processes, which is low in efficiency.

[0062] In the present embodiment, based on the formation process parameters, the battery cells are clustered to obtain a battery cell cluster and a battery cell outside the battery cell cluster, and the battery cell outside the battery cell cluster is determined as the target battery cell with abnormal capacity, so that the target battery cell with abnormal capacity is obtained by clustering instead of directly detecting the voltage of the battery cell, thereby improving the accuracy of the obtained target battery cell.

[0063] In some embodiments, the way of clustering the battery cells based on the formation process parameters to obtain the battery cell cluster and the battery cell outside the battery cell cluster can be set according to actual conditions. For example, in one possible implementation, the process of clustering the battery cells based on the formation process parameters to obtain the battery cell cluster and the battery cell outside the battery cell cluster can be:

[0064] Each battery cell is regarded as a position point in a three-dimensional space, and the position coordinates of a position point include the formation process parameters of each battery cell;

[0065] Based on the position coordinates of the position points, the position points are clustered to obtain the battery cell clusters and the battery cells outside the battery cell clusters.

[0066] The algorithm for clustering the position points can be selected according to actual conditions, for example, the algorithm for clustering the position points can include a k-means clustering algorithm or a hierarchical clustering algorithm, which is not limited in the embodiment.

[0067] In another possible implementation manner, the process of clustering the battery cells based on the formation process parameters to obtain the battery cell clusters and the battery cells outside the battery cell clusters can be:

[0068] The battery cells are clustered based on the formation process parameters by the clustering model to obtain the battery cell clusters and the battery cells outside the battery cell clusters.

[0069] The clustering model can be a large language model or a self-trained neural network model. When the clustering model is a large language model, the large language model can be directly called for clustering, and the convenience of clustering is improved.

[0070] For example, the formation process parameters include temperature and time, or the formation process parameters include temperature and capacity. The battery cells are clustered by the clustering model to obtain the battery cell clusters and the battery cells outside the battery cell clusters, which can be as shown in Figure 2 Figure 2 The abnormal point is the target battery cell with abnormal capacity. Figure 2 The blue points in the figure represent the battery cells in the battery cell clusters.

[0071] 104. The target battery cell is subjected to supplementary charging or discharging to complete the formation process of at least two battery cells.

[0072] The target battery cell can be subjected to supplementary charging or discharging by the formation cabinet to complete the formation process of at least two battery cells.

[0073] In the related art, when the at least two battery cells are charged, the charging process of each battery cell includes at least two charging stages, and the formation process of the at least two battery cells is completed at the end of the at least two charging stages. However, due to various influences, the capacities of the battery cells can be inconsistent at the end of the at least two charging stages.

[0074] ​Therefore, in the embodiment, the at least two battery cells are charged respectively, the charging process includes at least two charging stages, the formation process parameters of each battery cell in the first charging stage are recorded, the target battery cell with abnormal capacity is determined based on the formation process parameters, the target battery cell is supplemented with charging or discharging to complete the formation process of the at least two battery cells, and the battery cell with insufficient or excessive charging capacity due to equipment point or temperature is supplemented with charging or discharging in the formation process, so that the capacity of each battery cell can meet the consistency requirement at the end of the formation process (the capacity of each battery cell meets the consistency requirement, that is, the difference between the capacities of each battery cell is within a preset difference range), and the battery cell with capacity not meeting the consistency requirement is not found until the capacity grading process and returned to the formation process, thereby improving the efficiency of obtaining the battery cell with capacity meeting the consistency requirement.

[0075] In some embodiments, the target battery cell is supplemented with charging or discharging, including:

[0076] obtaining a center battery cell of the battery cell cluster;

[0077] determining a target capacity to be supplemented or released of the target battery cell based on the capacity of the center battery cell and the current capacity of the target battery cell;

[0078] supplementing the target battery cell with charging or discharging based on the target capacity.

[0079] The capacity of the center battery cell can be subtracted from the current capacity of the target battery cell to obtain the target capacity to be supplemented or released, and then the target time of the supplemented charging or discharging is determined based on the target capacity and the third preset current, and the target battery cell is supplemented with charging or discharging for the target time according to the third preset current. The third preset current and the second preset current can be the same or different, or the third preset current can be the same as or different from the preset current.

[0080] For example, the target capacity can be as shown in Figure 3 , Figure 3 “-3.2535” in the “-3.2535” of the “-3.2535” indicates that the target capacity to be released is 3.2535, Figure 3 “0.2045” in the “0.2045” indicates that the target capacity to be supplemented is 0.2045.

[0081] In the embodiment, the center battery cell of the battery cell cluster is obtained, the target capacity to be supplemented or released of the target battery cell is determined based on the capacity of the center battery cell and the current capacity of the target battery cell, and the target battery cell is supplemented with charging or discharging based on the target capacity, so that the target capacity is determined through the center battery cell, the target battery cell is supplemented with charging or discharging based on the target capacity, the accuracy of the target capacity is improved, and the consistency of the capacity of each battery cell at the end of the formation process is further ensured.

[0082] It can be understood that in some clustering algorithms, the class center can be obtained at the same time as the clustering result, that is, the center cell can be obtained, however, some clustering algorithms cannot obtain the class center when obtaining the clustering result, therefore, after obtaining the clustering result, the class center also needs to be determined, at this time, before obtaining the center cell of the cell cluster, the following steps are further included:

[0083] fitting processing is performed based on the formation process parameters of the cell cluster;

[0084] the center cell of the cell cluster is determined based on the fitting result.

[0085] The fitting processing manner can be set according to actual conditions, for example, the fitting processing manner can include a Euclidean distance manner, a Gaussian mixture model (GMM) or a principal component analysis (PCA), which is not limited in the embodiment.

[0086] For example, as shown in FIG. 1, the time, capacity and temperature of each cell in the first charging stage are obtained, clustering processing is performed on each cell based on the time, capacity and temperature, the cell cluster and the cell outside the cell cluster are obtained, the center cell in the cell cluster is determined based on the capacity of each cell in the cell cluster by the Euclidean distance manner, the target capacity is determined based on the capacity of the center cell and the current capacity of the target cell, and the target cell is supplemented with charging or discharging based on the target capacity, so as to correct the capacity of the target cell. Figure 4

[0087] In the embodiment, fitting processing is performed based on the formation process parameters of the cell cluster, the center cell of the cell cluster is determined based on the fitting result, and the accuracy of obtaining the center cell is improved.

[0088] In some embodiments, the target cell is supplemented with charging or discharging, including:

[0089] fitting is performed on the cell cluster to obtain a fitting curve, the abscissa of the fitting curve includes time and / or temperature, and the ordinate includes capacity;

[0090] the time and / or temperature of the target cell are substituted into the fitting curve to obtain the normal capacity of the target cell;

[0091] the normal capacity is subtracted from the current capacity of the target cell to obtain the target capacity that needs to be supplemented or needs to be released by the target cell;

[0092] the target cell is supplemented with charging or discharging based on the target capacity.

[0093] ​In the embodiment, the cell cluster is fitted to obtain a fitting curve, the abscissa of the fitting curve includes time and / or temperature, and the ordinate includes capacity, the time and / or temperature of the target cell are substituted into the fitting curve to obtain the normal capacity of the target cell, the normal capacity is subtracted by the current capacity of the target cell to obtain the target capacity that needs to be supplemented or needs to be released by the target cell, the target cell is supplemented with charging or discharged based on the target capacity, and the accuracy of the target capacity is improved, so that the consistency of the capacities of the cells at the end of the formation process is further ensured.

[0094] As can be seen from the above, in the embodiment of the application, at least two cells are charged respectively, the charging process includes at least two charging stages, the formation process parameters of each cell in the first charging stage are recorded, the target cell with abnormal capacity is determined based on the formation process parameters among the at least two cells, the target cell is supplemented with charging or discharged to complete the formation process of the at least two cells, and the charging or discharging of the cells in the formation process is realized, so that the consistency requirement of the capacities of the cells at the end of the formation process can be ensured, and the cells with capacities not meeting the consistency requirement are not found until the capacity grading process and returned to the formation process, the efficiency of obtaining the cells with capacities meeting the consistency requirement is improved, and the technical problem of low efficiency of obtaining the cells with capacities meeting the consistency requirement is improved.

[0095] Correspondingly, the embodiment of the application also provides an electronic device, which can be a terminal, and the terminal can be a smart phone, a tablet computer, a notebook computer, a touch screen, a game console, a personal computer (PC), a personal digital assistant (PDA), and the like. The electronic device is connected with the formation cabinet to obtain the formation process parameters from the formation cabinet and control the formation cabinet to charge or discharge the cells. As shown in Figure 5 , Figure 5 The electronic device provided in the embodiment of the application is a structural schematic diagram. The electronic device 500 includes a processor 501 having one or more processing cores, a memory 502 having one or more computer readable storage media, and a computer program stored in the memory 502 and executable on the processor. The processor 501 is electrically connected with the memory 502. Those skilled in the art can understand that the structure of the electronic device shown in the figure does not constitute a limitation on the electronic device, and can include more or fewer components than the figure, or combine certain components, or different component arrangements.

[0096] The processor 501 is the control center of the electronic device 500, connects all parts of the electronic device 500 through various interfaces and lines, executes various functions of the electronic device 500 and processes data by running or loading software programs and / or modules stored in the memory 502 and calling data stored in the memory 502, and thus monitors the whole electronic device 500.

[0097] In the embodiments of the present application, the processor 501 in the electronic device 500 loads the instructions corresponding to the processes of one or more application programs into the memory 502, and runs the application programs stored in the memory 502 by the processor 501, so as to realize various functions, such as:

[0098] charging the at least two battery cells respectively, the charging process including at least two charging stages;

[0099] recording the formation process parameters of each battery cell in the target charging stage;

[0100] determining a target battery cell with abnormal capacity among the at least two battery cells based on the formation process parameters;

[0101] supplementarily charging or discharging the target battery cell to complete the formation process of the at least two battery cells.

[0102] The specific implementation manners and corresponding beneficial effects of the above operations can be referred to the detailed description of the formation method above, and will not be repeated here.

[0103] Optionally, as shown in FIG. 5, Figure 5 The electronic device 500 further includes a touch display screen 503, a radio frequency circuit 504, an audio circuit 505, an input unit 506 and a power supply 507. The processor 501 is electrically connected with the touch display screen 503, the radio frequency circuit 504, the audio circuit 505, the input unit 506 and the power supply 507 respectively. Those skilled in the art can understand that the electronic device structure shown in FIG. 5 does not constitute a limitation on the electronic device, and can include more or fewer components than those shown, or combine certain components, or different component arrangements. Figure 5 The electronic device structure shown in FIG. 5 does not constitute a limitation on the electronic device, and can include more or fewer components than those shown, or combine certain components, or different component arrangements.

[0104] The touch display screen 503 can be used to display a graphical user interface and receive operation instructions generated by user acting on the graphical user interface. The touch display screen 503 can include a display panel and a touch panel. The display panel can be used to display information input by the user or provided to the user and various graphical user interfaces of the electronic device, which can be composed of graphics, text, icons, videos and any combination thereof. Optionally, the display panel can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc. The touch panel can be used to collect touch operations (such as operations of the user using a finger, a stylus or any suitable object or accessory on or near the touch panel) of the user on or near it and generate corresponding operation instructions, and the operation instructions execute corresponding programs. Optionally, the touch panel can include two parts of a touch detection device and a touch controller. The touch detection device detects the touch position of the user and detects the signals brought by the touch operation and transmits the signals to the touch controller; the touch controller receives the touch information from the touch detection device and converts it into touch coordinates and sends it to the processor 501, and can also receive commands from the processor 501 and execute them. The touch panel can cover the display panel, and when the touch panel detects a touch operation on or near it, it transmits to the processor 501 to determine the type of the touch event, and then the processor 501 provides corresponding visual output on the display panel according to the type of the touch event. In the embodiments of the present application, the touch panel and the display panel can be integrated into the touch display screen 503 to realize the input and output functions. However, in some embodiments, the touch panel and the touch panel can realize the input and output functions as two independent components. That is, the touch display screen 503 can also realize the input function as part of the input unit 506.

[0105] The radio frequency circuit 504 can be used to transceive radio frequency signals to establish wireless communication with network devices or other electronic devices.

[0106] The audio circuit 505 can be used to provide an audio interface between the user and the electronic device through the speaker and the microphone. The audio circuit 505 can convert the received audio data into an electrical signal and transmit it to the speaker, which converts it into a sound signal output; on the other hand, the microphone collects the sound signal and converts it into an electrical signal, which is received by the audio circuit 505 and converted into audio data, and then the audio data is output to the processor 501 for processing, and then transmitted to another electronic device through the radio frequency circuit 504, or output to the memory 502 for further processing. The audio circuit 505 can also include an earphone jack to provide communication between the external earphone and the electronic device.

[0107] The input unit 506 can be configured to receive input of numbers, character information, or user feature information (e.g., fingerprint, iris, face information, etc.), and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls.

[0108] The power supply 507 is configured to supply power to various components of the electronic device 500. Optionally, the power supply 507 can be logically connected to the processor 501 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. The power supply 507 can also include one or more than one direct current or alternating current power supply, a recharging system, a power supply fault detection circuit, a power supply converter or inverter, a power supply status indicator, or any other component.

[0109] Although Figure 5 The electronic device 500 can also include a camera, a sensor, a wireless fidelity module, a Bluetooth module, etc., which are not shown in the embodiments and will not be described herein.

[0110] In the above embodiments, the description of each embodiment focuses on different aspects, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0111] Those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructions, or by controlling relevant hardware by the instructions, which can be stored in a computer readable storage medium and loaded and executed by a processor.

[0112] To this end, an embodiment of the present application provides a computer readable storage medium, which stores a plurality of computer programs capable of being loaded by a processor to execute any one of the formation methods provided by the embodiments of the present application. For example, the computer program can execute the following steps:

[0113] Charging the at least two battery cells respectively, the charging process including at least two charging stages;

[0114] Recording formation process parameters of each battery cell in the target charging stage;

[0115] Determining a target battery cell with abnormal capacity among the at least two battery cells based on the formation process parameters;

[0116] Supplementarily charging or discharging the target battery cell to complete the formation process of the at least two battery cells.

[0117] The specific implementation and corresponding beneficial effects of each operation can be referred to the detailed description of the formation method above, which will not be described herein.

[0118] The computer readable storage medium can include a read only memory (ROM), a random access memory (RAM), a magnetic disk, an optical disk, or the like.

[0119] Due to the computer program stored in the computer readable storage medium, any one of the formation methods provided by the embodiments of the present application can be executed, thus achieving the beneficial effects of any one of the formation methods provided by the embodiments of the present application. Details are shown in the foregoing embodiments, which will not be repeated here.

[0120] The embodiments of the present application are described in detail above, and the specific examples are applied to describe the principles and implementation manners of the present application. The above embodiment description is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A chemical formation method, characterized in that: include: Charging at least two battery cells separately, wherein the charging process includes at least two charging stages; Recording the formation process parameters of each battery cell in the target charging stage; Based on the formation process parameters, determining target battery cells with abnormal capacity among at least two of the battery cells; The target battery cells are supplementarily charged or discharged to complete the formation process of at least two of the battery cells.

2. The chemical formation method according to claim 1, characterized in that The formation process parameter includes at least one of a time consumed in a target charging stage, a capacity of the battery cell, and a temperature in the target charging stage.

3. The chemical formation method according to claim 1, characterized in that The determining, based on the formation process parameters, target cells with abnormal capacities among at least two of the cells comprises: Clustering the battery cells based on the formation process parameters to obtain battery cell clusters and battery cells outside the battery cell clusters; The battery cells outside the battery cell cluster are determined as target battery cells with abnormal capacity.

4. The chemical formation method according to claim 3, characterized in that The clustering of the battery cells based on the formation process parameters to obtain a battery cell cluster and battery cells outside the battery cell cluster includes: The battery cells are clustered based on the formation process parameters using a clustering model to obtain battery cell clusters and battery cells outside the battery cell clusters.

5. The chemical formation method according to claim 3, characterized in that The supplementary charging or discharging of the target battery cell includes: Obtaining a central cell of the cell cluster; Determining a target capacity of the target cell that needs to be replenished or released based on the capacity of the central cell and the current capacity of the target cell; Based on the target capacity, the target battery cell is supplementarily charged or discharged.

6. The chemical formation method according to claim 5, characterized in that Before obtaining the central cell of the cell cluster, the method further includes: Performing fitting processing based on the formation process parameters of the battery cell cluster; Based on the fitting results, the central cell of the cell cluster is determined.

7. The chemical formation method according to any one of claims 1 to 6, characterized in that: The charging of at least two battery cells separately includes: Charging at least two battery cells in a first charging stage according to a preset current until the voltage of each battery cell reaches a preset voltage threshold; Each of the battery cells is charged in the second charging stage according to the preset voltage, and the charging process stops when the second charging stage time reaches the preset time.

8. A battery, characterized in that: Comprising the battery cell according to any one of claims 1 to 7.

9. An electronic device, characterized in that: The invention comprises a processor and a memory, wherein the memory stores a plurality of instructions; the processor loads instructions from the memory to execute the chemical formation method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor to execute the chemical formation method according to any one of claims 1 to 7.

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