Laminated battery cell, battery cell manufacturing method, device, system, equipment and medium

Abstract

The invention relates to a laminated battery cell, a battery cell manufacturing method, a device, a system, equipment and a medium. The method comprises the following steps: in response to a battery cell manufacturing instruction, cutting a cathode to be cut, and correspondingly placing the cut cathode pieces on each anode piece on a composite anode to form a laminated battery cell. Wherein isolating membranes are attached to the two sides of the composite anode, and the length of the head anode strip and the length of the tail anode strip are both smaller than the length of the middle anode strip. According to the method, the lengths of the head and tail anode strips in the manufactured laminated battery cell are shortened, the risk that the head and tail anode strips are in contact with the battery cell shell is reduced, and extrusion and damage to the head and tail anode strips due to the fact that external impact acts on the battery cell shell in the subsequent treatment and use process are reduced; therefore, the probability of decarburization and powder falling of the head and tail anode plates is reduced, and the cell quality is improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a laminated battery cell, a cell manufacturing method, a device, a system, equipment and a medium. Background Art

[0002] With the continuous development of new energy technology, the manufacturing technology of battery cells has also developed rapidly.

[0003] According to the different manufacturing processes, the battery cells can be roughly divided into laminated battery cells and wound battery cells. Taking laminated battery cells as an example, laminated battery cells are usually stacked in the order of positive electrode sheet, isolation film and cathode sheet.

[0004] However, in the related art, there is decarbonization at the head and tail anodes of the stacked battery cell, which affects the quality of the battery cell. Summary of the invention

[0005] Based on this, it is necessary to provide laminated battery cells, core manufacturing methods, devices, systems, equipment and media to reduce the probability of decarbonization of the first and last anodes of the laminated battery cells and improve the quality of the battery cells in response to the above technical problems.

[0006] In a first aspect, an embodiment of the present application provides a method for manufacturing a battery cell, the method comprising:

[0007] In response to the cell manufacturing instruction, cutting the cathode to be cut;

[0008] The cut cathode sheets are placed on the anode sheets on the composite anode to form a stacked battery cell; a separator is attached to both sides of the composite anode, and the lengths of the first anode sheet and the last anode sheet are both shorter than the length of the middle anode sheet.

[0009] In the embodiment of the present application, the cathode to be cut is cut in response to the cell manufacturing instruction, and the cut cathode sheets are placed on the corresponding anode sheets on the composite anode to form a laminated cell. Wherein, an isolation film is attached to both sides of the composite anode, and the lengths of the first anode sheet and the tail anode sheet are both shorter than the length of the middle anode sheet. In the above method, the lengths of the first and tail anode sheets in the laminated cell produced are shortened, reducing the risk of the first and tail anode sheets contacting the cell shell, reducing the extrusion and damage to the first and tail anode sheets caused by external impacts on the cell shell during subsequent processing and use, thereby reducing the probability of decarbonization and powdering of the first and tail anode sheets, and improving the quality of the cell.

[0010] In one embodiment, before placing the cut cathode sheets on the respective anode sheets on the composite anode, the method further comprises:

[0011] The first anode sheet and the last anode sheet of the initial composite anode are cut according to the preset cutting length to obtain the composite anode.

[0012] In the embodiment of the present application, before the cut cathode sheets are placed on the corresponding anode sheets on the composite anode, the first anode sheet and the tail anode sheet of the initial composite anode are cut according to a preset cutting length to obtain the composite anode. In the above method, the initial composite anode is cut with a preset cutting length, which improves the cutting accuracy of the initial composite anode and improves the batch cutting efficiency. Moreover, after the first anode sheet and the tail anode sheet of the initial composite anode are cut, the length of the first anode sheet and the tail anode sheet is shortened, the extrusion and damage of the first and tail anode sheets in the subsequent processing process are reduced, the probability of decarbonization and powdering of the first and tail anode sheets is reduced, the quality of the battery cell is improved, and the frequency of corrosion of the battery cell shell caused by decarbonization and powdering is reduced, and the quality and service life of the battery made based on the battery cell are correspondingly improved.

[0013] In one embodiment, cutting the first anode sheet and the last anode sheet of the initial composite anode according to a preset cutting length includes:

[0014] According to the preset cutting length, determining the cutting mark position of the first anode sheet and the cutting mark position of the last anode sheet of the initial composite anode;

[0015] The initial composite anode is cut according to the cutting mark position of the first anode sheet and the cutting mark position of the last anode sheet.

[0016] In the embodiment of the present application, the first anode sheet cutting mark position and the tail anode sheet cutting mark position of the initial composite anode are determined according to the preset cutting length, and then the initial composite anode is cut according to the first anode sheet cutting mark position and the tail anode sheet cutting mark position. In the above method, the first anode sheet cutting mark position and the tail anode sheet cutting mark position determined based on the preset cutting length can provide an accurate cutting position for cutting, thereby improving the cutting accuracy.

[0017] In one embodiment, cutting the cathode to be cut includes:

[0018] Get cathode sheet cutting parameters;

[0019] The cathode to be cut is cut according to the cathode sheet cutting parameters.

[0020] In the embodiment of the present application, the cathode sheet cutting parameters are obtained, and then the cathode to be cut is cut according to the cathode sheet cutting parameters. In the above method, the cathode sheet cutting parameters are used to characterize the cutting requirements, and the cathode to be cut is cut based on the cathode sheet cutting parameters, which improves the matching degree between the cut cathode sheet and the cutting requirements, thereby improving the accuracy of battery cell manufacturing.

[0021] In one embodiment, the cell manufacturing instruction carries the number of cathode sheets and the cutting length of the composite anode, and obtaining the cathode sheet cutting parameters includes:

[0022] According to the number of cathode sheets and the cutting length of the composite anode, the length of each cathode sheet to be cut is determined;

[0023] The length of each cathode sheet and the order of cutting the cathode sheets are used as cathode sheet cutting parameters.

[0024] In the embodiment of the present application, the length of each cathode sheet to be cut of the cathode to be cut is determined according to the number of cathode sheets and the cutting length of the composite anode, and then the length of each cathode sheet and the cutting order of the electrode sheets are used as cathode sheet cutting parameters. In the above method, because there is a length relationship that needs to be satisfied between the anode sheet in the composite anode and the cathode sheet to be cut, and the cutting length of the composite anode affects the length of the anode sheet in the composite anode, it is necessary to comprehensively determine the length of each cathode sheet based on the cutting length of the composite anode and the number of cathode sheets to be cut, so that the dimensional accuracy of each determined cathode sheet can be improved, and the length of each cathode sheet and the cutting order of the electrode sheets are used as cathode sheet cutting parameters, which provides an accurate cutting basis for subsequent cutting, thereby improving the accuracy and cutting efficiency of subsequent cutting.

[0025] In one embodiment, determining the length of each cathode sheet to be cut according to the number of cathode sheets and the cutting length of the composite anode includes:

[0026] According to the cutting length of the composite anode, the length of the first cathode piece and the length of the last cathode piece to be cut of the cathode to be cut are determined; and according to the cutting length of the composite anode, the length of each intermediate cathode piece to be cut of the cathode to be cut is determined.

[0027] In the embodiment of the present application, the length of the first cathode sheet and the length of the last cathode sheet to be cut of the cathode to be cut are determined according to the cutting length of the composite anode; and the length of each intermediate cathode sheet to be cut of the cathode to be cut is determined according to the cutting length of the composite anode. In the above method, the lengths of the first and last cathode sheets and the intermediate cathode sheets of each cathode sheet to be cut of the cathode to be cut are determined based on different information, so as to determine the lengths of different cathode sheets in a targeted manner, thereby improving the accuracy of the determined lengths of each cathode sheet.

[0028] In one embodiment, determining the length of each intermediate cathode sheet to be cut according to the cutting length of the composite anode includes:

[0029] Acquire the number of intermediate cathode pieces, and determine at least one candidate cathode piece for length compensation from among the intermediate cathode pieces according to the number of intermediate cathode pieces;

[0030] The length of each candidate cathode sheet is determined according to the cut length of the composite anode and the preset cathode sheet length, and the length of the remaining cathode sheets in each intermediate cathode sheet is determined to be the preset cathode sheet length.

[0031] In the embodiment of the present application, the number of intermediate cathode sheets is obtained, and at least one candidate cathode sheet for length compensation is determined from each intermediate cathode sheet according to the number of intermediate cathode sheets, and then the length of each candidate cathode sheet is determined according to the cut length of the composite anode and the preset cathode sheet length, and the length of the remaining cathode sheet in each intermediate cathode sheet is determined to be the preset cathode sheet length. In the above method, the length of the candidate cathode sheet compensates for the length required to shorten the first and last cathode sheets. When the length of the first and last cathode sheets is shortened, the sum of the lengths of the intermediate cathode sheets is increased to keep the total length of the cathode sheets unchanged, and the battery capacity made by the laminated battery cell is increased relative to the case where the length of the cathode sheets is not compensated, so as to maintain the stability of the battery capacity.

[0032] In one embodiment, determining the length of each candidate cathode sheet according to the cut length of the composite anode and the preset cathode sheet length includes:

[0033] Determining the compensation length of each candidate cathode piece according to the cut length of the composite anode and the number of each candidate cathode piece;

[0034] For each candidate cathode piece, the sum of the preset cathode piece length and the compensation length is determined as the length of the candidate cathode piece.

[0035] In the embodiment of the present application, the compensation length of each candidate cathode sheet is determined according to the cut length of the composite anode and the number of each candidate cathode sheet, and then for each candidate cathode sheet, the sum of the preset cathode sheet length and the compensation length is determined as the length of the candidate cathode sheet. In the above method, the compensation length of each candidate cathode sheet is accurately determined based on the cut length of the composite anode and the number of each candidate cathode sheet, and then the sum of the preset cathode sheet length and the compensation length is determined as the length of the candidate cathode sheet, which improves the accuracy of the determined length of the candidate cathode sheet, so that the candidate cathode sheet accurately compensates for the shortened length of the first and last cathode sheets, so that the executed battery capacity remains relatively stable, thereby improving the stability of the battery capacity.

[0036] In one embodiment, the cut cathode sheets are placed on the anode sheets on the composite anode to form a stacked battery cell, including:

[0037] The cut cathode sheets are placed alternately on both sides of each anode sheet in the composite anode;

[0038] The composite anode is folded according to the folding mark on the composite anode to form a laminated battery cell; in the laminated battery cell, each anode sheet and each cathode sheet are alternately stacked, and an isolation membrane is located between each anode sheet and each cathode sheet.

[0039] In the embodiment of the present application, the cut cathode sheets are placed alternately on both sides of each anode sheet in the composite anode, and then the composite anode is folded according to the folding mark on the composite anode to form a laminated battery cell in which each anode sheet and each cathode sheet are stacked and arranged alternately, and the isolation membrane is located between each anode sheet and each cathode sheet. In the above method, the cut cathode sheets are placed alternately on both sides of each anode sheet in the composite anode in advance, and the composite anode is subsequently folded directly along the folding mark on the composite anode, which improves the continuity between processes, reduces redundant operations, reduces production time, and correspondingly improves the efficiency of battery cell production.

[0040] In one embodiment, the cut cathode sheets are placed alternately on both sides of each anode sheet in the composite anode, comprising:

[0041] When the composite anode is moved by the transmission device, the placement time of each cathode sheet obtained by cutting is obtained;

[0042] According to the placement time, the cathode sheets are alternately placed on both sides of the anode sheets in the composite anode.

[0043] In the embodiment of the present application, when the transmission device drives the composite anode to move, the placement time of each cathode sheet obtained by cutting is obtained, so that each cathode sheet is sequentially and staggeredly placed on both sides of each anode sheet in the composite anode according to the placement time. In the above method, the transmission device can drive the composite anode to move, so that each cathode sheet is sequentially and staggeredly placed on both sides of each anode sheet in the composite anode by controlling the placement time of the cathode sheet, thereby improving the automation of cutting, saving time, and improving the placement efficiency of the cathode sheet. Based on the correlation between the placement time and the placement position, the placement time can be used to locate the placement position, and the time information can be accurately monitored, thereby improving the accuracy of the placement position located based on the placement time, and further improving the positioning accuracy of sequentially and staggeredly placing each cathode sheet on both sides of each anode sheet in the composite anode.

[0044] In one embodiment, obtaining the placement time of each cathode sheet obtained by cutting includes:

[0045] Obtaining the moving speed of the transmission device;

[0046] The placement time of each cathode sheet obtained by cutting is determined according to the moving speed, the length of each anode sheet on the composite anode and the length of each cathode sheet obtained by cutting.

[0047] In the embodiment of the present application, the moving speed of the transmission device is obtained to determine the placement time of each cathode sheet obtained by cutting according to the moving speed, the length of each anode sheet on the composite anode, and the length of each cathode sheet obtained by cutting. In the above method, the placement time of each cathode sheet obtained by cutting is comprehensively determined based on the moving speed of the transmission device, the length of each anode sheet on the composite anode, and the length of each cathode sheet obtained by cutting, so that the cathode sheet can fall on the corresponding anode sheet in the composite anode, thereby improving the success rate of the cathode sheet falling on the corresponding anode sheet and reducing the risk of the cathode sheet falling on the folding mark between adjacent anode sheets, thereby improving the accuracy and precision of cutting.

[0048] In one embodiment, the placement time of each cathode sheet obtained by cutting is determined according to the moving speed, the length of each anode sheet on the composite anode, and the length of each cathode sheet obtained by cutting, including:

[0049] For any cathode sheet, determining the placement position of the cathode sheet in the target anode sheet according to the length of the cathode sheet and the length of the target anode sheet corresponding to the cathode sheet;

[0050] The placement time of the cathode sheet is determined according to the time when the starting position of the target anode sheet is detected, the moving speed and the placement position of the transmission device.

[0051] In the embodiment of the present application, for any cathode sheet, the placement position of the cathode sheet in the target anode sheet is determined according to the length of the cathode sheet and the length of the target anode sheet corresponding to the cathode sheet, so as to determine the placement time of the cathode sheet according to the moment of detecting the starting position of the target anode sheet, the moving speed of the transmission device and the placement position. In the above method, the placement position of the cathode sheet in the target anode sheet is located in advance based on the length of the cathode sheet and the length of the corresponding target anode sheet, and then the placement time of the cathode sheet is determined with the placement position as a reference, combined with the moment of the starting position of the target anode sheet and the moving speed of the transmission device, so that the placement time matches the placement position, thereby improving the placement accuracy of the cathode sheet.

[0052] In one embodiment, obtaining the placement time of each cathode sheet obtained by cutting includes:

[0053] For any cathode sheet, obtaining a length change of the cathode sheet relative to a preset cathode sheet length;

[0054] Determine the change in placement time based on the change in length and the moving speed of the transmission device;

[0055] According to the change in placement time, the preset placement time of the cathode sheet is adjusted to obtain the placement time of the cathode sheet.

[0056] In the embodiment of the present application, for any cathode sheet, the length change of the cathode sheet relative to the preset cathode sheet length is obtained, so as to determine the placement time change according to the length change and the moving speed of the transmission device, and then adjust the preset placement time of the cathode sheet according to the placement time change to obtain the placement time of the cathode sheet. In the above method, based on the actual change of the length of each cathode sheet, the preset placement time of each cathode sheet is adjusted, so that the placement process of the cathode sheet is adapted to the change of the length of the cathode sheet, so that the cathode sheet after the length change can still fall on the corresponding target anode sheet, which improves the accuracy and the flexibility of placement.

[0057] In a second aspect, the embodiment of the present application further provides a laminated battery cell, comprising: a plurality of anode sheets and a plurality of cathode sheets; a separator is attached to both sides of each anode sheet;

[0058] The anode sheets and the cathode sheets are alternately stacked, and the isolation membrane is located between the anode sheets and the cathode sheets; wherein the lengths of the first anode sheet and the last anode sheet in the stacked battery cell are both shorter than the length of the middle anode sheet.

[0059] In one embodiment, the difference between the total length of the first anode sheet and the last anode sheet and the standard total length of the first and last anode sheets is equal to the difference between the total length of each middle anode sheet and the standard total length of the middle anode sheets;

[0060] Among them, the total standard length of the first and last anode sheets is the sum of the lengths of the first anode sheet and the last anode sheet, which are both preset anode sheet lengths; the total standard length of the middle anode sheets is the sum of the lengths of the preset anode sheet lengths of all the middle anode sheets.

[0061] In one embodiment, each cathode sheet in the laminated battery cell is centrally disposed relative to the corresponding anode sheet.

[0062] In a third aspect, an embodiment of the present application further provides a battery cell manufacturing system, comprising: a control device, a cutting device, and an operating device; wherein the control device communicates with the cutting device and the operating device respectively;

[0063] The control device is used to control the cutting device to cut the cathode to be cut in response to the battery cell manufacturing instruction, and control the operating device to place the cut cathode sheets on each anode sheet on the composite anode accordingly to form a stacked battery cell; an isolation film is attached to both sides of the composite anode, and the lengths of the first anode sheet and the tail anode sheet are both shorter than the length of the middle anode sheet.

[0064] In a fourth aspect, the present application also provides a battery cell manufacturing device, including:

[0065] A cutting execution module, used for cutting the cathode to be cut in response to the cell manufacturing instruction;

[0066] The pole piece folding module is used to place the cut cathode pieces on each anode piece on the composite anode to form a stacked battery cell; an isolation film is attached to both sides of the composite anode, and the lengths of the first anode piece and the tail anode piece are both shorter than the length of the middle anode piece.

[0067] In a fifth aspect, an embodiment of the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps in the battery cell manufacturing method provided in any one of the embodiments of the first aspect are implemented.

[0068] In a sixth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps in the battery cell manufacturing method provided in any one of the embodiments in the first aspect above are implemented.

[0069] In a seventh aspect, an embodiment of the present application further provides a computer program product, including a computer program, which, when executed by a processor, implements the steps in the battery cell manufacturing method provided in any embodiment of the first aspect above.

[0070] 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

[0071] Figure 1 is an internal structure diagram of a computer device in one embodiment;

[0072] Figure 2 A structural block diagram of a battery cell manufacturing system in one embodiment;

[0073] Figure 3 A schematic diagram of a process for manufacturing a battery cell in one embodiment;

[0074] Figure 4 is a schematic diagram of a composite anode in one embodiment;

[0075] Figure 5 is a schematic diagram of a composite anode in another embodiment;

[0076] Figure 6 is a schematic diagram of a composite anode in another embodiment;

[0077] Figure 7 A schematic diagram of a process for cutting an initial composite anode according to an embodiment;

[0078] Figure 8A schematic diagram of a process of cutting a cathode to be cut according to an embodiment;

[0079] Fig. 9 A schematic diagram of a process for obtaining cathode sheet cutting parameters in one embodiment;

[0080] Fig.10 A schematic diagram of a process for determining the length of a cathode sheet in one embodiment;

[0081] Fig.11 A schematic diagram of a process for determining the length of a candidate cathode piece in one embodiment;

[0082] Fig.12 A schematic diagram of a process for determining the length of a candidate cathode piece in another embodiment;

[0083] Fig.13 A diagram showing a process of cutting and placing a cathode sheet in one embodiment;

[0084] Fig.14 A schematic diagram of the structure of a foldable battery cell in one embodiment;

[0085] Fig.15 A schematic diagram of a process for placing a cathode sheet in one embodiment;

[0086] Fig.16 A schematic diagram of a process for obtaining the placement time of a cathode sheet in one embodiment;

[0087] Fig.17 A schematic diagram of a process for determining the placement time of a cathode sheet in one embodiment;

[0088] Fig.18 is a schematic diagram of the positional relationship between the cathode sheet and the anode sheet in one embodiment;

[0089] Fig.19 A schematic diagram of a process for obtaining the placement time of a cathode sheet in another embodiment;

[0090] Fig. 20 A schematic diagram of the structure of a foldable battery cell in another embodiment;

[0091] Fig.21 FIG. 4 is a structural block diagram of a battery cell manufacturing device in one embodiment. DETAILED DESCRIPTION

[0092] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0093] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the term "including" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0094] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0095] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two), unless otherwise clearly and specifically defined.

[0096] In recent years, batteries have been widely used in various electronic devices, involving communications, transportation, aerospace and many other fields. Among them, the battery cell, as the main component of the battery, can be roughly divided into laminated cells and wound cells according to different manufacturing processes. Laminated cells have been increasingly used in production and life due to their good cycle characteristics, high safety and high energy density.

[0097] In actual production, stacked battery cells are mostly formed by alternately placing negative electrode sheets and positive electrode sheets in a separator, and then folding the separator in a Z shape to integrate them. Alternatively, pre-cut anode sheets, separators and cathode sheets are stacked continuously in the order of anode sheets, separators, and cathode sheets.

[0098] However, whether it is a Z-folded or continuously stacked laminated battery cell, one end of the head and tail anode sheets in the battery cell may be in a free state without force. In this way, when the laminated battery cell is impacted by external force, the edges of the head and tail anodes in a free state are easily compressed and damaged by the impact of the external force, which leads to decarbonization and powdering of the edges, affecting the quality of the battery cell. In addition, if the battery cell is decarbonized and powdered, the detached carbon powder will overlap with the battery cell shell (usually an aluminum shell) to form a primary battery, which will corrode the battery cell shell, resulting in the risk of leakage in the manufactured battery, thus affecting the quality of the battery.

[0099] In practical applications, the main reason why the head and tail anodes in stacked battery cells are prone to decarbonization and powdering under external impact is that the size of the head and tail anodes is not appropriate. For example, because the length of the head and tail anodes is relatively long, the probability of the head and tail anodes being squeezed and damaged during subsequent processing and use is increased, which in turn causes decarbonization and powdering, and even leakage. Therefore, in order to fundamentally solve the problem of the head and tail anodes in stacked battery cells being prone to decarbonization and powdering, a stacked battery cell, a battery cell manufacturing method, system, equipment and product are provided in the embodiments of the present application. By shortening the length of the head anode sheet and the tail anode sheet during the battery cell manufacturing process, the squeezing and damage of the head and tail anode sheets during subsequent processing and use are reduced, that is, by shortening the length of the head and tail anodes, the probability of decarbonization and powdering of the head and tail anode sheets is reduced to improve the decarbonization and powdering, thereby improving the quality of the battery cell.

[0100] In one embodiment, a method for manufacturing a battery cell is provided. Figure 1 The computing device in is used as an example for explanation. The computer device may be a terminal, including a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for making a battery cell is implemented. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covered on the display screen, or a button, a trackball or a touchpad provided on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0101] Those skilled in the art will understand that Figure 1 The structure shown in the figure is only a block diagram of a partial structure related to the embodiment of the present application, and does not constitute a limitation on the computer device to which the embodiment of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0102] Before describing the battery cell manufacturing method provided in the embodiment of the present application, an embodiment of a battery cell manufacturing system that can be used in the battery cell manufacturing method is first provided. Figure 2As shown, in one embodiment, a battery cell manufacturing system is provided, including: a control device 100, a cutting device 200 and an operating device 300; wherein the control device 100 communicates with the cutting device 200 and the operating device 300 respectively.

[0103] The control device 100 is used to control the cutting device 200 to cut the cathode to be cut in response to the battery cell production instruction, and control the operating device 300 to place the cut cathode sheets on each anode sheet on the composite anode accordingly to form a stacked battery cell; an isolation film is attached to both sides of the composite anode, and the lengths of the first anode sheet and the tail anode sheet are both shorter than the length of the middle anode sheet.

[0104] The user can operate the control device 100 to trigger the cell manufacturing instruction, and the control device 100 responds to the cell manufacturing instruction accordingly, and controls the cutting device 200 to cut the cathode to be cut according to the preset cutting program. At the same time, the control operation device 300 obtains the pre-processed composite anode, and places the cut cathode on each anode sheet on the composite anode to form a laminated cell.

[0105] In one embodiment, the control device 100 can control the cutting device 200 to cut the first anode sheet and the last anode sheet of the initial composite anode according to a preset cutting length to obtain the composite anode after the above pretreatment.

[0106] In one embodiment, the cutting device 200 is equipped with an image sensor, which can be used to obtain an image of the electrode piece including the initial composite anode.

[0107] The control device 100 determines the cutting mark position, i.e., the cutting mark position of the first anode piece, on the first anode piece in the initial composite anode according to the preset cutting length based on the electrode piece image collected by the image sensor, and determines the cutting mark position, i.e., the cutting mark position of the tail anode piece, on the tail anode piece in the initial composite anode according to the preset cutting length. The cutting device 200 is controlled to perform cutting at the cutting mark position of the first anode piece and the cutting mark position of the tail anode piece, respectively, to obtain the composite anode after pretreatment.

[0108] In one of the embodiments, the battery cell manufacturing system may further include a transmission device, and the transmission device is used to drive the composite anode to move.

[0109] The control device 100 can start the transmission device so that the composite anode moves along a preset direction driven by the transmission device, and control the cutting device 200 to cut the cathode to be cut, so that the cut cathode sheet is placed on the corresponding anode sheet in the composite anode as the composite anode moves, and then control the operating device 300 to fold the composite anode to form a stacked battery cell.

[0110] It should be noted that the above-mentioned battery cell manufacturing system is used to implement the battery cell manufacturing method in any of the following embodiments, and the details can be referred to the specific description in the corresponding embodiment.

[0111] In one embodiment, the present application provides a method for manufacturing a battery cell, which is described by applying the method to a computer device. Figure 3 As shown, this embodiment includes the following steps:

[0112] S310 , in response to the cell manufacturing instruction, cutting the cathode to be cut.

[0113] The cathode to be cut is a large-sized cathode sheet, which can be cut to obtain multiple small-sized cathode sheets. Exemplarily, the cathode to be cut is a whole roll or a whole sheet of cathode sheet. The cell production instruction is used to instruct the cathode to be cut to form a stacked cell.

[0114] The cell production instruction may be triggered based on user operation. For example, the user may press a start switch on the control interface of the computer device to trigger the cell production instruction; the user may also press a start switch on the remote control unit to trigger the cell production instruction and send the cell production instruction to the computer device communicating with the remote control unit.

[0115] Optionally, after the cell manufacturing instruction is triggered, the computer device responds to the cell manufacturing instruction accordingly, and controls the cutting device to cut the cathode to be cut according to a preset cutting program. The preset cutting program includes cutting-related parameters. Exemplarily, the cutting-related parameters may include at least one of the number, size, and cutting order of the cathode sheets to be cut.

[0116] S320, placing the cut cathode sheets on the anode sheets on the composite anode accordingly to form a stacked battery cell.

[0117] Wherein, a separator is attached to both sides of the composite anode, and the lengths of the first anode sheet and the tail anode sheet are both shorter than the length of the middle anode sheet.

[0118] The separators on both sides of the composite anode are continuous, and a plurality of anode sheets are included between the separators. Figure 4 As shown, the anode sheets in the composite anode can be discontinuous, i.e., intermittent, and each anode sheet is an independent anode sheet; Figure 5 As shown, the anode sheet in the composite anode can be continuous, and the continuous anode sheet can be divided into multiple anode sheets based on the folding mark on the composite anode (the dotted line position is the position of the folding mark). The folding mark on the composite anode is used to indicate the folding position, that is, the position to be folded to form a laminated battery cell.

[0119] Optionally, the computer device obtains a pretreated composite anode, in which the lengths of the first anode sheet and the tail anode sheet are both shorter than the length of the middle anode sheet, and then controls the operating device to place the cut cathodes correspondingly on each anode sheet on the composite anode to form a stacked battery cell.

[0120] For example, Figure 5 Taking the composite anode in the example, the computer device can control the operating device to place the cut cathode sheets on the corresponding anode sheets in the composite anode, and cut along the folding mark on the composite anode, so as to stack the cut multiple small cells to form a stacked cell; Figure 3 Taking the composite anode as an example, the computer device can control the operating device to alternately place the cut cathode sheets on both sides of each anode sheet in the composite anode, and fold them in a Z shape along the folding mark on the composite anode to form a stacked battery cell.

[0121] In the embodiment of the present application, the cathode to be cut is cut in response to the cell manufacturing instruction, and the cut cathode sheets are placed on the corresponding anode sheets on the composite anode to form a laminated cell. Wherein, an isolation film is attached to both sides of the composite anode, and the lengths of the first anode sheet and the tail anode sheet are both shorter than the length of the middle anode sheet. In the above method, the lengths of the first and tail anode sheets in the laminated cell produced are shortened, reducing the risk of the first and tail anode sheets contacting the cell shell, reducing the extrusion and damage to the first and tail anode sheets caused by external impacts on the cell shell during subsequent processing and use, thereby reducing the probability of decarbonization and powdering of the first and tail anode sheets, and improving the quality of the cell.

[0122] The composite anode is obtained after pretreatment. Based on this, in one embodiment, before placing the cut cathode sheets on the respective anode sheets on the composite anode, the method further includes:

[0123] The first anode sheet and the last anode sheet of the initial composite anode are cut according to the preset cutting length to obtain the composite anode.

[0124] The preset cutting length is the required cutting length, which can be preset according to the requirements. The initial composite anode is a composite anode of preset specifications, and the size of each anode sheet in the initial composite anode is the same. The first anode sheet and the last anode sheet of the initial composite anode are the anode sheets at both ends of the initial composite anode. For example, Figure 6 As shown, the initial composite anode includes six anode sheets 1 to 6, and the length of each anode sheet is X. Anode sheets 1 and 6 are the first anode sheet and the last anode sheet of the initial composite anode in the figure, respectively.

[0125] Optionally, the computer device receives a preset cutting length input by a user, and cuts the first anode sheet and the last anode sheet of the initial composite anode according to the preset cutting length to obtain a composite anode. The preset cutting length can be the total cutting length or the single-end cutting length.

[0126] For example, when the preset cutting length x is the total cutting length, the computer device can cut the first anode sheet and the last anode sheet of the initial composite anode separately, and set the total cutting length to x, such as cutting the first anode sheet and the last anode sheet by a length of x / 2 respectively; when the preset cutting length x is the single-end cutting length, such as Figure 6 As shown, the computer equipment can cut the first anode sheet and the last anode sheet of the initial composite anode into x lengths respectively.

[0127] In the embodiment of the present application, before the cut cathode sheets are placed on the corresponding anode sheets on the composite anode, the first anode sheet and the tail anode sheet of the initial composite anode are cut according to a preset cutting length to obtain the composite anode. In the above method, the initial composite anode is cut with a preset cutting length, which improves the cutting accuracy of the initial composite anode and improves the batch cutting efficiency. Moreover, after the first anode sheet and the tail anode sheet of the initial composite anode are cut, the length of the first anode sheet and the tail anode sheet is shortened, the extrusion and damage of the first and tail anode sheets in the subsequent processing process are reduced, the probability of decarbonization and powdering of the first and tail anode sheets is reduced, the quality of the battery cell is improved, and the frequency of corrosion of the battery cell shell caused by decarbonization and powdering is reduced, and the quality and service life of the battery made based on the battery cell are correspondingly improved.

[0128] The cutting can be performed based on the cutting mark position. In one embodiment, Figure 7 As shown, the above-mentioned cutting of the first anode sheet and the last anode sheet of the initial composite anode according to the preset cutting length includes:

[0129] S710, determining a first anode sheet cutting mark position and a last anode sheet cutting mark position of an initial composite anode according to a preset cutting length.

[0130] The cutting mark is used to indicate the cutting position. The first anode sheet cutting mark is the cutting position on the first anode sheet in the initial composite anode, and the last anode sheet cutting mark is the cutting position on the last anode sheet in the initial composite anode.

[0131] Optionally, when the initial composite anode is to be cut, the computer device may obtain an image of the pole piece including the initial composite anode according to the image sensor carried by the cutting device, so as to determine the cutting mark position, i.e., the first anode piece cutting mark position, on the first anode piece in the initial composite anode with a preset cutting length based on the pole piece image, and determine the cutting mark position, i.e., the tail anode piece cutting mark position, on the tail anode piece in the initial composite anode according to the preset cutting length.

[0132] Optionally, the starting position and the end position of the initial composite anode are respectively provided with start and end identifiers, and the computer device can determine the starting position and the end position of the initial composite anode in the electrode image by identifying the start and end identifiers, and respectively determine the first anode sheet cutting mark position and the tail anode sheet cutting mark position according to the step length determined based on the preset cutting length, starting from the starting position and the end position. Among them, the distance between the first anode sheet cutting mark position and the starting position, and the distance between the tail anode sheet cutting mark position and the terminal position, are the step lengths determined based on the preset cutting length.

[0133] For example, the start and end identifiers are mark holes. When the preset cutting length x is a single-end cutting length, the computer device can identify the mark hole, and use the center point of the mark hole as the starting position and the end position of the initial composite anode. Then, using the starting position as the beginning and the preset cutting length x as the step length, the first anode sheet cutting mark position is determined. At the same time, using the end position as the beginning and the preset cutting length x as the step length, the tail anode sheet cutting mark position is determined.

[0134] S720, cutting the initial composite anode according to the cutting mark position of the first anode sheet and the cutting mark position of the last anode sheet.

[0135] Optionally, after determining the first anode sheet cutting mark position and the last anode sheet cutting mark position on the initial composite anode, the computer device controls the cutting device to cut at the first anode sheet cutting mark position and the last anode sheet cutting mark position respectively to obtain the pretreated composite anode.

[0136] In the embodiment of the present application, the first anode sheet cutting mark position and the tail anode sheet cutting mark position of the initial composite anode are determined according to the preset cutting length, and then the initial composite anode is cut according to the first anode sheet cutting mark position and the tail anode sheet cutting mark position. In the above method, the first anode sheet cutting mark position and the tail anode sheet cutting mark position determined based on the preset cutting length can provide an accurate cutting position for cutting, thereby improving the cutting accuracy.

[0137] In practical applications, the cathode to be cut can be cut based on the cathode sheet cutting parameters. Figure 8 As shown, the above-mentioned cutting of the cathode to be cut includes:

[0138] S810, obtaining cathode sheet cutting parameters.

[0139] Among them, the cathode sheet cutting parameters are cutting-related parameters used in cutting the cathode sheet, and can be used to characterize cutting requirements.

[0140] Optionally, when cutting the cathode to be cut, the computer device may directly obtain the pre-stored cathode sheet cutting parameters, or determine the cathode sheet cutting parameters based on other information.

[0141] Exemplarily, the cathode sheet cutting parameters include at least one of the number, size, and cutting order of the cathode sheets to be cut. The computer device can determine the number and cutting order of the cathode sheets based on the user's input operation, and can also determine the size of each cathode sheet based on the cutting length of the composite anode, thereby obtaining the cathode sheet cutting parameters.

[0142] S820, cutting the cathode to be cut according to the cathode sheet cutting parameters.

[0143] Optionally, after obtaining the cathode sheet cutting parameters, the computer device may cut the cathode to be cut according to the cathode sheet cutting parameters to obtain a plurality of cathode sheets that meet the cutting requirements.

[0144] In the embodiment of the present application, the cathode sheet cutting parameters are obtained, and then the cathode to be cut is cut according to the cathode sheet cutting parameters. In the above method, the cathode sheet cutting parameters are used to characterize the cutting requirements, and the cathode to be cut is cut based on the cathode sheet cutting parameters, which improves the matching degree between the cut cathode sheet and the cutting requirements, thereby improving the accuracy of battery cell manufacturing.

[0145] The cell manufacturing instruction carries the number of cathode sheets and the cutting length of the composite anode. Based on this, in one embodiment, Fig. 9 As shown, the above-mentioned obtaining of cathode sheet cutting parameters includes:

[0146] S910, determining the length of each cathode sheet to be cut according to the number of cathode sheets and the cutting length of the composite anode.

[0147] Optionally, before pressing the start switch, the user may input in advance the number of cathode sheets to be cut and the cutting length of the composite anode to generate a cell manufacturing instruction carrying the number of cathode sheets and the cutting length of the composite anode. When the computer device obtains the cathode sheet cutting parameters, it parses the cell manufacturing instruction to extract the number of cathode sheets and the cutting length of the composite anode, and determines the length of each cathode sheet to be cut according to the number of cathode sheets and the cutting length of the composite anode.

[0148] S920, taking the length of each cathode sheet and the cutting order of the cathode sheets as cathode sheet cutting parameters.

[0149] The electrode sheet cutting order is the order in which the cathode sheets to be cut need to be cut.

[0150] Optionally, after obtaining the length of each cathode sheet to be cut, the computer device can use the length of each cathode sheet and the cutting order of the cathode sheets as cathode sheet cutting parameters. The cutting order of the cathode sheets can be determined based on the user's input operation and carried in the battery cell manufacturing instruction, or can be determined based on a general cutting order stored in the computer device.

[0151] Exemplarily, in the case where the cell manufacturing instruction also carries the electrode cutting order, the computer device can obtain the electrode cutting order while parsing the cell manufacturing instruction to obtain the number of cathode sheets and the cutting length of the composite anode, and then use the length of each cathode sheet determined based on the number of cathode sheets and the cutting length of the composite anode, and the electrode cutting order as the cathode sheet cutting parameters. In the case where a general cutting order is pre-stored in the computer device, the computer device can obtain the general cutting order to determine the electrode cutting order based on the general cutting order, and then use the length of each cathode sheet determined based on the number of cathode sheets and the cutting length of the composite anode, and the electrode cutting order as the cathode sheet cutting parameters. Among them, the general cutting order can include a short-long-short cutting order, that is, first cutting to obtain a cathode sheet with a relatively short length, then cutting to obtain a cathode sheet with a relatively long length, and finally cutting to obtain a cathode sheet with a relatively short length.

[0152] In the embodiment of the present application, the length of each cathode sheet to be cut of the cathode to be cut is determined according to the number of cathode sheets and the cutting length of the composite anode, and then the length of each cathode sheet and the cutting order of the electrode sheets are used as cathode sheet cutting parameters. In the above method, because there is a length relationship that needs to be satisfied between the anode sheet in the composite anode and the cathode sheet to be cut, and the cutting length of the composite anode affects the length of the anode sheet in the composite anode, it is necessary to comprehensively determine the length of each cathode sheet based on the cutting length of the composite anode and the number of cathode sheets to be cut, so that the dimensional accuracy of each determined cathode sheet can be improved, and the length of each cathode sheet and the cutting order of the electrode sheets are used as cathode sheet cutting parameters, which provides an accurate cutting basis for subsequent cutting, thereby improving the accuracy and cutting efficiency of subsequent cutting.

[0153] According to the cutting order, the cathode sheets to be cut include the first cathode sheet cut first, the last cathode sheet cut last, and the middle cathode sheet cut in the middle. Therefore, in one embodiment, the length of each cathode sheet to be cut according to the number of cathode sheets and the cutting length of the composite anode is determined, including:

[0154] According to the cutting length of the composite anode, the length of the first cathode piece and the length of the last cathode piece to be cut are determined; and according to the number of intermediate cathode pieces and the cutting length of the composite anode, the length of each intermediate cathode piece to be cut is determined.

[0155] Optionally, when determining the length of each cathode sheet to be cut, the computer equipment can respectively determine the length of the first and last cathode sheets in the cathode sheets to be cut, i.e., the length of the first cathode sheet and the length of the last cathode sheet, as well as the length of each middle cathode sheet in the cathode sheets to be cut, i.e., the length of the middle cathode sheet.

[0156] Exemplarily, in the case where the cut length of the composite anode represents the cut length of a single end, the computer device may use the cut length of the composite anode as the length required to shorten the first and last cathode sheets, so as to obtain the first cathode sheet length and the last cathode sheet length by subtracting the required shortened length from the preset cathode sheet length. The preset cathode sheet length is a preset cathode sheet length that matches the preset anode sheet length of each anode sheet in the initial composite anode. For example, the cut length x of the composite anode = the length s required to shorten the first and last cathode sheets, the preset cathode sheet length S, the first cathode sheet length and the last cathode sheet length are Sx or Ss. The length s required to shorten the first and last cathode sheets is determined based on the cut length x of the composite anode, and s≥x.

[0157] Exemplarily, the computer device may determine the length of the first and last cathode sheets that need to be shortened based on the cutting length of the composite anode, and when the cutting length of the composite anode is the length of the first and last cathode sheets that need to be shortened, determine at least one intermediate cathode sheet among the intermediate cathode sheets that need to be cut for cathode length compensation to obtain the length of each intermediate cathode sheet. For example, the cutting length x of the composite anode = the length s that the first and last cathode sheets need to be shortened, and the computer device may select any two intermediate cathode sheets among the intermediate cathode sheets that need to be cut for the cathode to be cut, and for the selected two intermediate cathode sheets, perform x / s length compensation based on the preset cathode sheet length S, and determine that the lengths of the two intermediate cathode sheets are S+x or S+s, and the lengths of the remaining intermediate cathode sheets are S.

[0158] In the embodiment of the present application, the length of the first cathode sheet and the length of the last cathode sheet to be cut of the cathode to be cut are determined according to the cutting length of the composite anode; and the length of each intermediate cathode sheet to be cut of the cathode to be cut is determined according to the cutting length of the composite anode. In the above method, the lengths of the first and last cathode sheets and the intermediate cathode sheets of each cathode sheet to be cut of the cathode to be cut are determined based on different information, so as to determine the lengths of different cathode sheets in a targeted manner, thereby improving the accuracy of the determined lengths of each cathode sheet.

[0159] Since the first and last anode sheets are cut in the composite anode, the length of the first and last cathode sheets is shortened relative to the preset cathode sheet length to fit the first and last anode sheets, thereby reducing the capacity of the manufactured battery. Based on this, in order to increase the battery capacity and maintain the stability of the battery capacity, in one embodiment, as Fig.10 As shown, the above-mentioned method of determining the length of each intermediate cathode sheet to be cut according to the cutting length of the composite anode includes:

[0160] S1010, obtaining the number of intermediate cathode pieces, and determining at least one candidate cathode piece for length compensation from among the intermediate cathode pieces according to the number of intermediate cathode pieces.

[0161] It should be noted that, since the length of the first and last cathode sheets is shortened relative to the preset cathode sheet length, the total length of the cathode sheets in the battery cell made of the first and last cathode sheets and the middle cathode sheets with shortened length is less than the total length of the cathode sheets in the battery cell made of the first and last cathode sheets and the middle cathode sheets with unshortened length, thereby reducing the capacity of the manufactured battery, that is, the reduction in the total length of the cathode sheets reduces the battery capacity. In order to increase the battery capacity and keep the battery capacity from decreasing, the length of the middle cathode sheet can be increased to compensate for the length when the length of the first and last cathode sheets is shortened, so that the total length of the cathode sheets remains unchanged, thereby increasing the battery capacity and keeping the battery capacity from decreasing.

[0162] Optionally, the computer device may determine the number of candidate cathode pieces for candidate supplementation based on the number of intermediate cathode pieces, and determine the intermediate cathode pieces of candidate cathode piece data from the intermediate cathode pieces as candidate cathode pieces. Exemplarily, the computer device may select all intermediate cathode pieces as candidate cathode pieces, that is, the number of intermediate cathode pieces is equal to the number of candidate cathode pieces, or may select some intermediate cathode pieces as candidate cathode pieces, that is, the number of intermediate cathode pieces is greater than the number of candidate cathode pieces.

[0163] Optionally, when selecting some of the intermediate cathode sheets as candidate cathode sheets, the computer device may compare the number of the intermediate cathode sheets with a preset threshold to determine the number of candidate cathode sheets. Exemplarily, when the number of the intermediate cathode sheets is less than or equal to the preset threshold, the computer device may determine that the number of candidate cathode sheets is equal to the number of the intermediate cathode sheets; when the number of the intermediate cathode sheets is greater than the preset threshold, the computer device may determine that the number of candidate cathode sheets is equal to the preset number. The preset number may be pre-set and is less than the number of the intermediate cathode sheets.

[0164] Optionally, in the case of selecting part of the middle cathode pieces as candidate cathode pieces, the computer device may select the middle cathode pieces far from the first and last cathode pieces as candidate cathode pieces, or may select the middle cathode pieces near the first and last cathode pieces as candidate cathode pieces. For example, the number of cathode pieces to be cut is 40, and the number of candidate cathode pieces is 20, which are cathode piece 1, cathode piece 2, ... cathode piece 40 in sequence. The computer device may select the middle cathode pieces 11 to 30 far from the first cathode piece 1 and the last cathode piece 40 as candidate cathode pieces, or may select the middle cathode pieces 2-11 near the first cathode piece 1, and the middle cathode pieces 30-39 near the last cathode piece 40 as candidate cathode pieces.

[0165] S1020, determining the length of each candidate cathode sheet according to the cut length of the composite anode and the preset cathode sheet length, and determining the length of the remaining cathode sheets in each intermediate cathode sheet to be the preset cathode sheet length.

[0166] Optionally, the computer equipment can determine the length that the first and last cathode sheets need to be shortened based on the cutting length of the composite anode, determine the length that each candidate cathode sheet needs to be compensated according to the length that the first and last cathode sheets need to be shortened, and add the required compensation length to the preset cathode sheet length to obtain the length of the candidate cathode sheet, and at the same time, determine the length of the remaining cathode sheets in each intermediate cathode sheet as the preset cathode sheet length.

[0167] In the embodiment of the present application, the number of intermediate cathode sheets is obtained, and at least one candidate cathode sheet for length compensation is determined from each intermediate cathode sheet according to the number of intermediate cathode sheets, and then the length of each candidate cathode sheet is determined according to the cut length of the composite anode and the preset cathode sheet length, and the length of the remaining cathode sheets in each intermediate cathode sheet is determined to be the preset cathode sheet length. In the above method, the length of the candidate cathode sheet compensates for the length required to shorten the first and last cathode sheets. When the length of the first and last cathode sheets is shortened, the sum of the lengths of the intermediate cathode sheets is increased to keep the total length of the cathode sheets unchanged, and the battery capacity made by the laminated battery cell is increased relative to the case where the length of the cathode sheets is not compensated, so as to maintain the stability of the battery capacity.

[0168] The length of the candidate cathode piece is equal to the sum of the preset cathode piece length and the compensation length. Based on this, in one embodiment, if Fig.11 As shown, the above-mentioned method of determining the length of each candidate cathode sheet according to the cut length of the composite anode and the preset cathode sheet length includes:

[0169] S1110 , determining the compensation length of each candidate cathode sheet according to the cut length of the composite anode and the number of candidate cathode sheets.

[0170] The compensation length of the candidate cathode piece is the length that needs to be compensated for the candidate cathode piece, that is, the length that needs to be increased.

[0171] Optionally, in the case where the cutting length of the composite anode is a single-end cutting length, the computer device may directly use the cutting length of the composite anode as the length required to shorten the first and last cathode sheets, and determine the compensation length of each candidate cathode sheet according to the cutting length of the composite anode and the number of each candidate cathode sheet. Exemplarily, the computer device may determine that 2 times the cutting length of the composite anode is the total required compensation length, and evenly divide the total required compensation length to each candidate cathode sheet as the compensation length of each candidate cathode sheet. For example, the cutting length of the composite anode is x, and the number of candidate cathode sheets is n. The computer device may use 2x / n as the compensation length of each candidate cathode sheet. The computer device may non-uniformly divide the cutting length of the composite anode to each candidate cathode sheet as the compensation length of each candidate cathode sheet. For example, the computer device may allocate the compensation length to each candidate cathode sheet in an increasing form in a stacking order, and the sum of the compensation lengths of all candidate cathode sheets is equal to the cutting length of the composite anode.

[0172] S1120. For each candidate cathode piece, determine the sum of the preset cathode piece length and the compensation length as the length of the candidate cathode piece.

[0173] Optionally, after obtaining the compensation length of each candidate cathode sheet, the computer device may obtain the sum of the compensation length of each candidate cathode sheet and the preset cathode sheet length as the length of the corresponding candidate cathode sheet. For example, when the computer device evenly divides the total required compensation length 2x into each candidate cathode sheet as the compensation length L of each candidate cathode sheet, L=2x / n, the preset cathode sheet length S, and the length of each candidate cathode sheet is S+2x / n.

[0174] In the embodiment of the present application, the compensation length of each candidate cathode sheet is determined according to the cut length of the composite anode and the number of each candidate cathode sheet, and then for each candidate cathode sheet, the sum of the preset cathode sheet length and the compensation length is determined as the length of the candidate cathode sheet. In the above method, the compensation length of each candidate cathode sheet is accurately determined based on the cut length of the composite anode and the number of each candidate cathode sheet, and then the sum of the preset cathode sheet length and the compensation length is determined as the length of the candidate cathode sheet, which improves the accuracy of the determined length of the candidate cathode sheet, so that the candidate cathode sheet accurately compensates for the shortened length of the first and last cathode sheets, so that the executed battery capacity remains relatively stable, thereby improving the stability of the battery capacity.

[0175] In order to improve the efficiency of battery cell manufacturing, in one embodiment, as Fig.12 As shown, the cathode sheets obtained by cutting are placed on the anode sheets on the composite anode to form a stacked battery cell, including:

[0176] S1210, placing the cut cathode sheets alternately on both sides of each anode sheet in the composite anode.

[0177] Optionally, the outer sides of the separators on both sides of the composite anode are coated with an adhesive layer, and the computer device can alternately place the cut cathode sheets on both sides of each anode sheet in the composite anode to adhere each cathode sheet to the composite anode through the adhesive layer.

[0178] For example, the computer device can directly control the operating device to alternately place the cut cathode sheets on both sides of the corresponding anode sheets in the composite anode. Fig.13 As shown, the computer device can also place the cut cathode sheets alternately on both sides of the corresponding anode sheets in the composite anode by unwinding and cutting the cathode sheets in a bidirectional manner.

[0179] S1220. Fold the composite anode according to the folding mark on the composite anode to form a stacked battery cell; in the stacked battery cell, each anode sheet and each cathode sheet are alternately stacked, and an isolation membrane is located between each anode sheet and each cathode sheet.

[0180] The folding mark on the composite anode is used to indicate the folding position, that is, the position where folding is required.

[0181] Optionally, after the cathode sheet is placed, the computer device can control the operating device to fold the composite anode in a Z-shape along the thickness direction along the folding mark on the composite anode, so as to wrap the cathode sheet with the composite anode to form a laminated battery cell in which each anode sheet and each cathode sheet are alternately stacked and the isolation film is located between each anode sheet and each cathode sheet. Fig.13 After the composite anode with the cathode sheet set in the middle is folded in a Z shape along the folding mark, the following can be obtained: Fig.14 The stacked cell shown.

[0182] In the embodiment of the present application, the cut cathode sheets are placed alternately on both sides of each anode sheet in the composite anode, and then the composite anode is folded according to the folding mark on the composite anode to form a laminated battery cell in which each anode sheet and each cathode sheet are stacked and arranged alternately, and the isolation membrane is located between each anode sheet and each cathode sheet. In the above method, the cut cathode sheets are placed alternately on both sides of each anode sheet in the composite anode in advance, and the composite anode is subsequently folded directly along the folding mark on the composite anode, which improves the continuity between processes, reduces redundant operations, reduces production time, and correspondingly improves the efficiency of battery cell production.

[0183] In industrial production, the composite anode can be moved by a transmission device, and the cathode sheets cut can be placed alternately on both sides of each anode sheet in the composite anode based on the cooperation between the transmission device and the cutting device. Based on this, in one embodiment, Fig.15 As shown, the above-mentioned cathode sheets obtained by cutting are placed alternately on both sides of each anode sheet in the composite anode, including:

[0184] S1510. When the transmission device drives the composite anode to move, the placement time of each cathode sheet obtained by cutting is obtained.

[0185] It should be noted that if Fig.13 As shown, the composite anode moves along a preset direction driven by the transmission device, and the cutting device cuts the cathode to be cut. The cathode sheet obtained by cutting is placed on the corresponding anode sheet in the composite anode as the composite anode moves. Among them, the placement time of the cathode sheet depends on the cutting time of the cathode sheet. In the above process, the cathode sheet is directly placed on the anode sheet after being cut, and the cutting time is very short and can be ignored. Therefore, the placement time of the cathode sheet is the cutting time of the cathode sheet.

[0186] Optionally, when the transmission device drives the composite anode to move, the computer device can directly obtain the pre-stored placement time of each cathode sheet obtained by cutting, or determine the placement time of each cathode sheet obtained by cutting based on the real-time movement of the composite anode. Exemplarily, the computer device can monitor the initial position of the composite anode placed on the transmission device through an image sensor, obtain the moment when the composite anode moves, use the moment as the placement time of the first cathode sheet obtained by cutting, and use the moment when the folding mark is subsequently monitored as the placement time of the next cathode sheet, until the placement time of the last cathode sheet is obtained.

[0187] S1520, according to the placement time, the cathode sheets are alternately placed on both sides of the anode sheets in the composite anode.

[0188] Optionally, after obtaining the placement time of each cathode sheet, the computer equipment can control the cutting device to use the placement time of the corresponding cathode sheet as the cutting time, and cut the cathode to be cut in combination with the cathode sheet cutting parameters, and based on the division of labor and cooperation between the cutting devices arranged on both sides of the composite anode, the cut cathode sheets can be placed in sequence and alternately on both sides of each anode sheet in the composite anode.

[0189] In the embodiment of the present application, when the transmission device drives the composite anode to move, the placement time of each cathode sheet obtained by cutting is obtained, so that each cathode sheet is sequentially and staggeredly placed on both sides of each anode sheet in the composite anode according to the placement time. In the above method, the transmission device can drive the composite anode to move, so that each cathode sheet is sequentially and staggeredly placed on both sides of each anode sheet in the composite anode by controlling the placement time of the cathode sheet, thereby improving the automation of cutting, saving time, and improving the placement efficiency of the cathode sheet. Based on the correlation between the placement time and the placement position, the placement time can be used to locate the placement position, and the time information can be accurately monitored, thereby improving the accuracy of the placement position located based on the placement time, and further improving the positioning accuracy of sequentially and staggeredly placing each cathode sheet on both sides of each anode sheet in the composite anode.

[0190] In order to place the cut cathode sheets on the anode sheets in the composite anode, in one embodiment, as Fig.16 As shown, the above-mentioned step of obtaining the placement time of each cathode sheet obtained by cutting includes:

[0191] S1610. Obtain the moving speed of the transmission device.

[0192] The moving speed of the transmission device is the speed at which the transmission device drives the composite anode to move.

[0193] Optionally, when obtaining the placement time of each cut cathode sheet, the computer device may obtain the moving speed of the transmission device in advance. Exemplarily, the moving speed of the transmission device may be determined based on the user's input operation, or the currently set transmission speed may be obtained from the transmission device based on the same communication between the computer device and the transmission device.

[0194] S1620, determining the placement time of each cathode sheet obtained by cutting according to the moving speed, the length of each anode sheet on the composite anode, and the length of each cathode sheet obtained by cutting.

[0195] Optionally, after obtaining the moving speed of the transmission device, the computer equipment can determine the placement time of each cut cathode sheet based on the moving speed, the length of each anode sheet on the composite anode, and the length of each cut cathode sheet, so that the cathode sheet is cut at the corresponding placement time and falls on the corresponding anode sheet in the composite anode.

[0196] In the embodiment of the present application, the moving speed of the transmission device is obtained to determine the placement time of each cathode sheet obtained by cutting according to the moving speed, the length of each anode sheet on the composite anode, and the length of each cathode sheet obtained by cutting. In the above method, the placement time of each cathode sheet obtained by cutting is comprehensively determined based on the moving speed of the transmission device, the length of each anode sheet on the composite anode, and the length of each cathode sheet obtained by cutting, so that the cathode sheet can fall on the corresponding anode sheet in the composite anode, thereby improving the success rate of the cathode sheet falling on the corresponding anode sheet and reducing the risk of the cathode sheet falling on the folding mark between adjacent anode sheets, thereby improving the accuracy and precision of cutting.

[0197] In the process of placing the cathode sheet, the placement position of the cathode sheet on the anode sheet can be pre-positioned to determine the corresponding placement time according to the placement position. Based on this, in one embodiment, if Fig.17 As shown, the above-mentioned method of determining the placement time of each cathode sheet obtained by cutting according to the moving speed, the length of each anode sheet on the composite anode and the length of each cathode sheet obtained by cutting includes:

[0198] S1710: For any cathode sheet, determine the placement position of the cathode sheet in the target anode sheet according to the length of the cathode sheet and the length of the target anode sheet corresponding to the cathode sheet.

[0199] The target anode piece corresponding to the cathode piece is the anode piece placed corresponding to the cut cathode piece. For example, for the first cathode piece cut, the corresponding target anode piece is the first anode piece in the composite anode; for the second cathode piece cut, the corresponding target anode piece is the second anode piece in the composite anode… and so on, for the last cathode piece cut, the corresponding target anode piece is the last anode piece in the composite anode.

[0200] It should be noted that the cathode and anode sheets in the battery cell must meet a preset length relationship. Normally, the length of the cathode sheet of the battery cell must be slightly smaller than the length of the corresponding anode sheet. Therefore, the length of the cathode sheet obtained by the above processing is also smaller than the length of the corresponding target anode sheet.

[0201] Optionally, for any cathode sheet obtained by cutting, the computer device may obtain a length difference between the cathode sheet and a corresponding target anode sheet, so as to determine a placement position of the cathode sheet in the target anode sheet according to the length difference.

[0202] During the placement of the cathode sheet, if the cathode sheet is placed close to one end of the corresponding target anode sheet and far away from the other end, it is easy to cause an overhang (OH) defect of the cathode sheet over the corresponding target anode sheet. Therefore, the cathode sheet needs to be placed relatively centered on the corresponding target anode sheet.

[0203] For example, when the length of the cathode sheet is less than the length of the corresponding target anode sheet, the computer device may obtain the length difference between the cathode sheet and the corresponding target anode sheet, and use the position on the target anode sheet that is half the length difference from the starting position as the placement position of the cathode sheet. Fig.18 As shown, the length of the cathode sheet c is 4 mm, and the corresponding length of the target anode sheet a is 6 mm, and the length difference between the two is 2 mm. The computer device uses the position T on the target anode sheet a, which is half the length difference from the starting position O, that is, 1 mm, as the placement position of the cathode sheet c.

[0204] S1720, determining the placement time of the cathode sheet according to the time when the starting position of the target anode sheet is detected, the moving speed and placement position of the transmission device.

[0205] Exemplarily, when the target anode sheet is the first anode sheet, the computer device may use the position where the image sensor first detects the anode sheet as the starting position of the target anode sheet; when the target anode sheet is a non-first anode sheet, the computer device may use the position where the image sensor detects the folding mark on the composite anode as the starting position of the anode sheet after the folding mark.

[0206] Optionally, the computer device can calculate the placement time of the cathode sheet based on the time when the starting position of the target anode sheet is detected, the moving speed of the transmission device, and the placement position. For example, continuing the above example, the time t1 when the starting position of the target anode sheet a is detected, the moving speed v of the transmission device, and the placement position T, the computer device can obtain the distance m between the placement position T and the starting position O of the target anode sheet, and use the distance speed formula to obtain the time △t required for the target anode sheet to move the distance m at the moving speed v, and then obtain t1+△t as the placement time of the cathode sheet c.

[0207] In the embodiment of the present application, for any cathode sheet, the placement position of the cathode sheet in the target anode sheet is determined according to the length of the cathode sheet and the length of the target anode sheet corresponding to the cathode sheet, so as to determine the placement time of the cathode sheet according to the moment of detecting the starting position of the target anode sheet, the moving speed of the transmission device and the placement position. In the above method, the placement position of the cathode sheet in the target anode sheet is located in advance based on the length of the cathode sheet and the length of the corresponding target anode sheet, and then the placement time of the cathode sheet is determined with the placement position as a reference, combined with the moment of the starting position of the target anode sheet and the moving speed of the transmission device, so that the placement time matches the placement position, thereby improving the placement accuracy of the cathode sheet.

[0208] Typically, the cutting device pre-sets a preset cutting time for each cathode sheet determined based on the general cutting parameters, i.e., a preset placement time. When the length of the cut cathode sheet and the length of the anode sheet in the composite anode change, the preset placement time needs to be adjusted. Based on this, in one embodiment, Fig.19 As shown, the above-mentioned step of obtaining the placement time of each cathode sheet obtained by cutting includes:

[0209] S1910. For any cathode plate, obtain a length change of the cathode plate relative to a preset cathode plate length.

[0210] The preset cathode sheet length is the length of the cathode sheet required to be cut and set in the general cutting parameters.

[0211] Optionally, for any cathode sheet obtained by cutting, the computer device can obtain the length change of the cathode sheet relative to the preset cathode sheet length, that is, the length difference obtained by subtracting the preset cathode sheet length from the length of the cathode sheet, and use the length difference as the length change.

[0212] S1920. Determine the change in placement time according to the change in length and the moving speed of the transmission device.

[0213] Among them, among the cut cathode sheets, the first and last cathode sheets are shortened in length, and the corresponding length change is a negative value, while the middle cathode sheet is partially or completely increased in length, and the corresponding length change is a positive value.

[0214] Optionally, for each intermediate cathode sheet, the computer device may determine a change in the placement time of the corresponding intermediate cathode sheet according to a change in the length of the intermediate cathode sheet and a moving speed of the transmission device.

[0215] Exemplarily, in order to make the intermediate cathode sheet still be placed in the center on the corresponding target anode sheet, the computer device may divide the half length change by the moving speed of the transmission device, and use the obtained value as the placement time change of the corresponding intermediate cathode sheet. If the length change of the intermediate cathode sheet is positive, the placement time change of the corresponding intermediate cathode sheet is negative; if the length change of the intermediate cathode sheet is zero, the placement time change of the corresponding intermediate cathode sheet is zero.

[0216] Optionally, for the first cathode sheet, the computer equipment can determine the change in the placement time of the first cathode sheet based on the change in length of the first cathode sheet, the change in length of the first anode sheet, and the moving speed of the transmission device; for the tail cathode sheet, the computer equipment can determine the change in the placement time of the tail cathode sheet based on the change in length of the tail cathode sheet, the change in length of the tail anode sheet, and the moving speed of the transmission device.

[0217] Exemplarily, in order to make the first cathode sheet still be placed in the center of the corresponding target anode sheet, the computer device can use the length change of the first cathode sheet minus the length change of the first anode sheet to obtain the difference in changes, and divide the difference of half of the changes by the moving speed of the transmission device, and use the obtained value as the change in the placement time of the first cathode sheet. Among them, if the difference in the changes is positive, the change in the placement time of the corresponding first cathode sheet is positive; if the difference in the changes is zero, the change in the placement time of the corresponding first cathode sheet is zero; if the difference in the changes is negative, the change in the placement time of the corresponding first cathode sheet is negative. The placement process of the tail cathode sheet is similar and will not be repeated here.

[0218] S1930. Adjust the preset placement time of the cathode sheet according to the change in placement time to obtain the placement time of the cathode sheet.

[0219] Optionally, after obtaining the change in placement time of each cathode sheet, the computer device may use the change in placement time to adjust the preset placement time of the corresponding cathode sheet to obtain the placement time of the cathode sheet.

[0220] It should be noted that the placement time variation can be positive or negative, and the computer device can directly use the preset placement time plus the placement time variation to obtain the placement time of the corresponding cathode sheet. Wherein, when the placement time variation is positive, the preset placement time of the corresponding cathode sheet is delayed to obtain the placement time of the cathode sheet; when the placement time variation is negative, the preset placement time of the corresponding cathode sheet is advanced to obtain the placement time of the cathode sheet.

[0221] In the embodiment of the present application, for any cathode sheet, the length change of the cathode sheet relative to the preset cathode sheet length is obtained, so as to determine the placement time change according to the length change and the moving speed of the transmission device, and then adjust the preset placement time of the cathode sheet according to the placement time change to obtain the placement time of the cathode sheet. In the above method, based on the actual change of the length of each cathode sheet, the preset placement time of each cathode sheet is adjusted, so that the placement process of the cathode sheet is adapted to the change of the length of the cathode sheet, so that the cathode sheet after the length change can still fall on the corresponding target anode sheet, which improves the accuracy and the flexibility of placement.

[0222] In one embodiment, the present application also provides a laminated battery cell, such as Fig. 20 As shown, the laminated battery cell includes a plurality of anode sheets 101 and a plurality of cathode sheets 102 , and a separator 103 is attached to both sides of each anode sheet 101 .

[0223] The anode sheets 101 and the cathode sheets 102 are alternately stacked, and the separator 103 is located between the anode sheets 101 and the cathode sheets 102 .

[0224] Among them, the lengths of the first anode sheet and the tail anode sheet in the stacked battery cell are both shorter than the length of the middle anode sheet.

[0225] Normally, the lengths of the middle anode sheets are the same. In practical applications, the battery cell needs to meet the manufacturing requirement that the length of the cathode sheet is slightly smaller than the length of the corresponding anode sheet. When the length of the first anode sheet and the last anode sheet is shortened relative to the length of the middle anode sheet, the lengths of the first cathode sheet and the last cathode sheet are also shortened adaptively. Accordingly, the lengths of the first cathode sheet and the last cathode sheet are also smaller than the length of the middle cathode sheet.

[0226] In the embodiment of the present application, the length of the first and last anode sheets in the stacked battery cell is smaller than the length of the middle anode sheet, which reduces the extrusion and damage to the first and last anode sheets during subsequent processing and use, thereby reducing the probability of decarbonization and powdering of the first and last anode sheets and improving the quality of the battery cell.

[0227] In one embodiment, the difference between the total length of the first anode sheet and the last anode sheet and the standard total length of the first and last anode sheets is equal to the difference between the total length of each middle anode sheet and the standard total length of the middle anode sheets.

[0228] Among them, the total standard length of the first and last anode sheets is the sum of the lengths of the first anode sheet and the last anode sheet, which are both preset anode sheet lengths; the total standard length of the middle anode sheets is the sum of the lengths of the preset anode sheet lengths of all the middle anode sheets.

[0229] In the embodiment of the present application, the difference between the total length of the first anode sheet and the tail anode sheet and the standard total length of the first and tail is equal to the difference between the total length of each intermediate anode sheet and the standard total length of the intermediate anode sheets. The total length of the intermediate anode sheets compensates for the length that is reduced by the total length of the first anode sheet and the tail anode sheet relative to the standard total length of the first and tail. Compared with the case where the length of the cathode sheet is not compensated, the battery capacity made by the stacked battery cell is increased to maintain the stability of the battery capacity.

[0230] In one embodiment, each cathode sheet 102 in the stacked cell is centrally disposed relative to the corresponding anode sheet 101, thereby reducing the OH failure caused by the cathode sheet being close to one end of the corresponding target anode sheet and away from the other end.

[0231] In one embodiment, Fig.21 As shown, a battery cell manufacturing device is also provided, comprising:

[0232] A cutting execution module 2101 is used to cut the cathode to be cut in response to the battery cell manufacturing instruction;

[0233] The electrode sheet folding module 2102 is used to place the cut cathode sheets on the anode sheets on the composite anode to form a stacked battery cell; isolation films are attached to both sides of the composite anode, and the lengths of the first anode sheet and the last anode sheet are both shorter than the length of the middle anode sheet.

[0234] In one of the embodiments, the battery cell manufacturing device further includes an anode control module;

[0235] The anode control module is used to cut the first anode sheet and the last anode sheet of the initial composite anode according to a preset cutting length to obtain a composite anode.

[0236] In one embodiment, the anode control module includes a marking position submodule and a cutting submodule;

[0237] The marking position submodule is used to determine the first anode sheet cutting mark position and the last anode sheet cutting mark position of the initial composite anode according to the preset cutting length; the cutting submodule is used to cut the initial composite anode according to the first anode sheet cutting mark position and the last anode sheet cutting mark position.

[0238] In one embodiment, the cutting execution module 2101 includes a parameter acquisition module and a cutting control module;

[0239] The parameter acquisition module is used to acquire the cathode sheet cutting parameters; the cutting control module is used to cut the cathode to be cut according to the cathode sheet cutting parameters.

[0240] In one of the embodiments, the cell manufacturing instruction carries the number of cathode sheets and the cutting length of the composite anode, and the parameter acquisition module includes: a length submodule and a parameter submodule;

[0241] The length submodule is used to determine the length of each cathode sheet to be cut according to the number of cathode sheets and the cutting length of the composite anode; the parameter submodule is used to use the length of each cathode sheet and the cutting order of the cathode sheets as cathode sheet cutting parameters.

[0242] In one embodiment, the length submodule includes a first and last length unit and an intermediate length unit:

[0243] The head and tail length units are used to determine the head cathode sheet length and tail cathode sheet length to be cut according to the cutting length of the composite anode; and the middle length unit is used to determine the middle cathode sheet lengths to be cut according to the cutting length of the composite anode.

[0244] In one of the embodiments, the intermediate length unit includes: a candidate subunit and a length subunit;

[0245] The candidate subunit is used to obtain the number of intermediate cathode sheets, and determine at least one candidate cathode sheet for length compensation from each intermediate cathode sheet according to the number of intermediate cathode sheets; the length subunit is used to determine the length of each candidate cathode sheet according to the cutting length of the composite anode and the preset cathode sheet length, and determine the length of the remaining cathode sheets in each intermediate cathode sheet to be the preset cathode sheet length.

[0246] In one embodiment, the candidate subunit is used to:

[0247] According to the cut length of the composite anode and the number of candidate cathode sheets, the compensation length of each candidate cathode sheet is determined; for each candidate cathode sheet, the sum of the preset cathode sheet length and the compensation length is determined as the length of the candidate cathode sheet.

[0248] In one embodiment, the pole piece folding module 2102 includes a pole piece placement module and a pole piece folding module;

[0249] The electrode sheet placement module is used to alternately place the cut cathode sheets on both sides of each anode sheet in the composite anode; the electrode sheet folding module is used to fold the composite anode according to the folding mark on the composite anode to form a stacked battery cell; the anode sheets and cathode sheets in the stacked battery cell are stacked alternately, and the isolation membrane is located between each anode sheet and each cathode sheet.

[0250] In one of the embodiments, the pole piece placement module includes: a time acquisition submodule and a placement execution submodule;

[0251] The time acquisition submodule is used to obtain the placement time of each cut cathode sheet when the transmission device drives the composite anode to move; the placement execution submodule is used to control the operating device 30 to place each cathode sheet in turn on both sides of each anode sheet in the composite anode according to the placement time.

[0252] In one of the embodiments, the time acquisition submodule includes: a speed acquisition unit and a time determination unit;

[0253] The speed acquisition unit is used to acquire the moving speed of the transmission device; the time determination unit is used to determine the placement time of each cut cathode sheet according to the moving speed, the length of each anode sheet on the composite anode and the length of each cut cathode sheet.

[0254] In one of the embodiments, the time determination unit includes: a position subunit and a time subunit;

[0255] The position subunit is used to determine the placement position of any cathode sheet in the target anode sheet based on the length of the cathode sheet and the length of the target anode sheet corresponding to the cathode sheet; the moment subunit is used to determine the placement time of the cathode sheet based on the moment when the starting position of the target anode sheet is detected, the moving speed of the transmission device and the placement position.

[0256] In one embodiment, the time acquisition submodule includes: a change unit, a time unit, and an adjustment unit;

[0257] The variation unit is used to obtain the length variation of any cathode sheet relative to the preset cathode sheet length; the moment unit is used to determine the placement moment variation based on the length variation and the moving speed of the transmission device; the adjustment unit is used to adjust the preset placement moment of the cathode sheet based on the placement moment variation to obtain the placement moment of the cathode sheet.

[0258] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0259] In response to the cell manufacturing instruction, the cathode to be cut is cut; the cut cathode sheets are placed on the anode sheets on the composite anode to form a stacked cell; isolation films are attached to both sides of the composite anode, and the lengths of the first anode sheet and the tail anode sheet are both shorter than the length of the middle anode sheet.

[0260] In one embodiment, the processor implements the following steps when executing the computer program:

[0261] The first anode sheet and the last anode sheet of the initial composite anode are cut according to the preset cutting length to obtain the composite anode.

[0262] In one embodiment, the processor implements the following steps when executing the computer program:

[0263] According to the preset cutting length, the first anode sheet cutting mark position and the tail anode sheet cutting mark position of the initial composite anode are determined; according to the first anode sheet cutting mark position and the tail anode sheet cutting mark position, the initial composite anode is cut.

[0264] In one embodiment, the processor implements the following steps when executing the computer program:

[0265] Acquire cathode sheet cutting parameters; and cut the cathode to be cut according to the cathode sheet cutting parameters.

[0266] In one embodiment, the processor implements the following steps when executing the computer program:

[0267] According to the number of cathode sheets and the cutting length of the composite anode, the length of each cathode sheet to be cut is determined; the length of each cathode sheet and the cutting sequence of the cathode sheets are used as cathode sheet cutting parameters.

[0268] In one embodiment, the processor implements the following steps when executing the computer program:

[0269] According to the cutting length of the composite anode, the length of the first cathode piece and the length of the last cathode piece to be cut of the cathode to be cut are determined; and according to the cutting length of the composite anode, the length of each intermediate cathode piece to be cut of the cathode to be cut is determined.

[0270] In one embodiment, the processor implements the following steps when executing the computer program:

[0271] The number of intermediate cathode sheets is obtained, and at least one candidate cathode sheet for length compensation is determined from each intermediate cathode sheet according to the number of intermediate cathode sheets; the length of each candidate cathode sheet is determined according to the cutting length of the composite anode and the preset cathode sheet length, and the length of the remaining cathode sheets in each intermediate cathode sheet is determined to be the preset cathode sheet length.

[0272] In one embodiment, the processor implements the following steps when executing the computer program:

[0273] According to the cut length of the composite anode and the number of candidate cathode sheets, the compensation length of each candidate cathode sheet is determined; for each candidate cathode sheet, the sum of the preset cathode sheet length and the compensation length is determined as the length of the candidate cathode sheet.

[0274] In one embodiment, the processor implements the following steps when executing the computer program:

[0275] The cut cathode sheets are placed alternately on both sides of each anode sheet in the composite anode; the composite anode is folded according to the folding mark on the composite anode to form a stacked battery cell; the anode sheets and the cathode sheets in the stacked battery cell are stacked alternately, and the isolation membrane is located between each anode sheet and each cathode sheet.

[0276] In one embodiment, the processor implements the following steps when executing the computer program:

[0277] When the composite anode is moved by the transmission device, the placement time of each cathode sheet obtained by cutting is obtained; according to the placement time, each cathode sheet is alternately placed on both sides of each anode sheet in the composite anode.

[0278] In one embodiment, the processor implements the following steps when executing the computer program:

[0279] The moving speed of the transmission device is obtained; and the placement time of each cut cathode sheet is determined according to the moving speed, the length of each anode sheet on the composite anode, and the length of each cut cathode sheet.

[0280] In one embodiment, the processor implements the following steps when executing the computer program:

[0281] For any cathode sheet, the placement position of the cathode sheet in the target anode sheet is determined based on the length of the cathode sheet and the length of the target anode sheet corresponding to the cathode sheet; the placement time of the cathode sheet is determined based on the moment when the starting position of the target anode sheet is detected, the moving speed of the transmission device and the placement position.

[0282] In one embodiment, the processor implements the following steps when executing the computer program:

[0283] For any cathode sheet, obtain the length change of the cathode sheet relative to the preset cathode sheet length; determine the placement time change based on the length change and the moving speed of the transmission device; adjust the preset placement time of the cathode sheet based on the placement time change to obtain the placement time of the cathode sheet.

[0284] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0285] In response to the cell manufacturing instruction, the cathode to be cut is cut; the cut cathode sheets are placed on the anode sheets on the composite anode to form a stacked cell; isolation films are attached to both sides of the composite anode, and the lengths of the first anode sheet and the tail anode sheet are both shorter than the length of the middle anode sheet.

[0286] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0287] The first anode sheet and the last anode sheet of the initial composite anode are cut according to the preset cutting length to obtain the composite anode.

[0288] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0289] According to the preset cutting length, the first anode sheet cutting mark position and the tail anode sheet cutting mark position of the initial composite anode are determined; according to the first anode sheet cutting mark position and the tail anode sheet cutting mark position, the initial composite anode is cut.

[0290] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0291] Acquire cathode sheet cutting parameters; and cut the cathode to be cut according to the cathode sheet cutting parameters.

[0292] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0293] According to the number of cathode sheets and the cutting length of the composite anode, the length of each cathode sheet to be cut is determined; the length of each cathode sheet and the cutting sequence of the cathode sheets are used as cathode sheet cutting parameters.

[0294] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0295] According to the cutting length of the composite anode, the length of the first cathode piece and the length of the last cathode piece to be cut of the cathode to be cut are determined; and according to the cutting length of the composite anode, the length of each intermediate cathode piece to be cut of the cathode to be cut is determined.

[0296] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0297] The number of intermediate cathode sheets is obtained, and at least one candidate cathode sheet for length compensation is determined from each intermediate cathode sheet according to the number of intermediate cathode sheets; the length of each candidate cathode sheet is determined according to the cutting length of the composite anode and the preset cathode sheet length, and the length of the remaining cathode sheets in each intermediate cathode sheet is determined to be the preset cathode sheet length.

[0298] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0299] According to the cut length of the composite anode and the number of candidate cathode sheets, the compensation length of each candidate cathode sheet is determined; for each candidate cathode sheet, the sum of the preset cathode sheet length and the compensation length is determined as the length of the candidate cathode sheet.

[0300] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0301] The cut cathode sheets are placed alternately on both sides of each anode sheet in the composite anode; the composite anode is folded according to the folding mark on the composite anode to form a stacked battery cell; the anode sheets and the cathode sheets in the stacked battery cell are stacked alternately, and the isolation membrane is located between each anode sheet and each cathode sheet.

[0302] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0303] When the composite anode is moved by the transmission device, the placement time of each cathode sheet obtained by cutting is obtained; according to the placement time, each cathode sheet is alternately placed on both sides of each anode sheet in the composite anode.

[0304] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0305] The moving speed of the transmission device is obtained; and the placement time of each cut cathode sheet is determined according to the moving speed, the length of each anode sheet on the composite anode, and the length of each cut cathode sheet.

[0306] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0307] For any cathode sheet, the placement position of the cathode sheet in the target anode sheet is determined based on the length of the cathode sheet and the length of the target anode sheet corresponding to the cathode sheet; the placement time of the cathode sheet is determined based on the moment when the starting position of the target anode sheet is detected, the moving speed of the transmission device and the placement position.

[0308] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0309] For any cathode sheet, obtain the length change of the cathode sheet relative to the preset cathode sheet length; determine the placement time change based on the length change and the moving speed of the transmission device; adjust the preset placement time of the cathode sheet based on the placement time change to obtain the placement time of the cathode sheet.

[0310] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0311] In response to the cell manufacturing instruction, the cathode to be cut is cut; the cut cathode sheets are placed on the anode sheets on the composite anode to form a stacked cell; isolation films are attached to both sides of the composite anode, and the lengths of the first anode sheet and the tail anode sheet are both shorter than the length of the middle anode sheet.

[0312] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0313] The first anode sheet and the last anode sheet of the initial composite anode are cut according to the preset cutting length to obtain the composite anode.

[0314] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0315] According to the preset cutting length, the first anode sheet cutting mark position and the tail anode sheet cutting mark position of the initial composite anode are determined; according to the first anode sheet cutting mark position and the tail anode sheet cutting mark position, the initial composite anode is cut.

[0316] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0317] Acquire cathode sheet cutting parameters; and cut the cathode to be cut according to the cathode sheet cutting parameters.

[0318] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0319] According to the number of cathode sheets and the cutting length of the composite anode, the length of each cathode sheet to be cut is determined; the length of each cathode sheet and the cutting sequence of the cathode sheets are used as cathode sheet cutting parameters.

[0320] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0321] According to the cutting length of the composite anode, the length of the first cathode piece and the length of the last cathode piece to be cut of the cathode to be cut are determined; and according to the cutting length of the composite anode, the length of each intermediate cathode piece to be cut of the cathode to be cut is determined.

[0322] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0323] The number of intermediate cathode sheets is obtained, and at least one candidate cathode sheet for length compensation is determined from each intermediate cathode sheet according to the number of intermediate cathode sheets; the length of each candidate cathode sheet is determined according to the cutting length of the composite anode and the preset cathode sheet length, and the length of the remaining cathode sheets in each intermediate cathode sheet is determined to be the preset cathode sheet length.

[0324] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0325] According to the cut length of the composite anode and the number of candidate cathode sheets, the compensation length of each candidate cathode sheet is determined; for each candidate cathode sheet, the sum of the preset cathode sheet length and the compensation length is determined as the length of the candidate cathode sheet.

[0326] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0327] The cut cathode sheets are placed alternately on both sides of each anode sheet in the composite anode; the composite anode is folded according to the folding mark on the composite anode to form a stacked battery cell; the anode sheets and the cathode sheets in the stacked battery cell are stacked alternately, and the isolation membrane is located between each anode sheet and each cathode sheet.

[0328] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0329] When the composite anode is moved by the transmission device, the placement time of each cathode sheet obtained by cutting is obtained; according to the placement time, each cathode sheet is alternately placed on both sides of each anode sheet in the composite anode.

[0330] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0331] The moving speed of the transmission device is obtained; and the placement time of each cut cathode sheet is determined according to the moving speed, the length of each anode sheet on the composite anode, and the length of each cut cathode sheet.

[0332] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0333] For any cathode sheet, the placement position of the cathode sheet in the target anode sheet is determined based on the length of the cathode sheet and the length of the target anode sheet corresponding to the cathode sheet; the placement time of the cathode sheet is determined based on the moment when the starting position of the target anode sheet is detected, the moving speed of the transmission device and the placement position.

[0334] In one embodiment, the computer program, when executed by a processor, implements the following steps:

[0335] For any cathode sheet, obtain the length change of the cathode sheet relative to the preset cathode sheet length; determine the placement time change based on the length change and the moving speed of the transmission device; adjust the preset placement time of the cathode sheet based on the placement time change to obtain the placement time of the cathode sheet.

[0336] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0337] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0338] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for manufacturing a battery cell, characterized in that: The method comprises: In response to the cell manufacturing instruction, cutting the cathode to be cut; The cut cathode sheets are placed on the anode sheets on the composite anode to form a stacked battery cell; isolation films are attached to both sides of the composite anode, and the lengths of the first anode sheet and the last anode sheet are both shorter than the length of the middle anode sheet.

2. The method according to claim 1, characterized in that Before placing the cut cathode sheets on the respective anode sheets on the composite anode, the method further comprises: The first anode sheet and the last anode sheet of the initial composite anode are cut according to a preset cutting length to obtain the composite anode.

3. The method according to claim 2, characterized in that The method of cutting the first anode sheet and the last anode sheet of the initial composite anode according to the preset cutting length includes: According to the preset cutting length, determining the cutting mark position of the first anode sheet and the cutting mark position of the last anode sheet of the initial composite anode; The initial composite anode is cut according to the first anode sheet cutting mark position and the last anode sheet cutting mark position.

4. The method according to any one of claims 1 to 3, characterized in that The step of cutting the cathode to be cut comprises: Get cathode sheet cutting parameters; The cathode to be cut is cut according to the cathode sheet cutting parameters.

5. The method according to claim 4, characterized in that The cell manufacturing instruction carries the number of cathode sheets and the cutting length of the composite anode, and the obtaining of cathode sheet cutting parameters includes: Determining the length of each cathode sheet to be cut according to the number of cathode sheets and the cutting length of the composite anode; The length of each cathode sheet and the order of cutting the cathode sheets are used as the cathode sheet cutting parameters.

6. The method according to claim 5, characterized in that The step of determining the length of each cathode sheet to be cut according to the number of cathode sheets and the cutting length of the composite anode comprises: According to the cutting length of the composite anode, the length of the first cathode sheet and the length of the tail cathode sheet to be cut of the cathode to be cut are determined; and according to the cutting length of the composite anode, the length of each intermediate cathode sheet to be cut of the cathode to be cut is determined.

7. The method according to claim 6, characterized in that The step of determining the length of each intermediate cathode sheet to be cut according to the cutting length of the composite anode comprises: Acquire the number of intermediate cathode sheets, and determine at least one candidate cathode sheet for length compensation from each of the intermediate cathode sheets according to the number of intermediate cathode sheets; The length of each candidate cathode sheet is determined according to the cut length of the composite anode and the preset cathode sheet length, and the length of the remaining cathode sheets in each intermediate cathode sheet is determined to be the preset cathode sheet length.

8. The method according to claim 7, characterized in that The step of determining the length of each candidate cathode sheet according to the cut length of the composite anode and the preset cathode sheet length comprises: Determining the compensation length of each candidate cathode sheet according to the cut length of the composite anode and the number of each candidate cathode sheet; For each candidate cathode piece, the sum of the preset cathode piece length and the compensation length is determined as the length of the candidate cathode piece.

9. The method according to any one of claims 1 to 8, characterized in that Placing the cut cathode sheets on the anode sheets on the composite anode to form a stacked battery cell, comprising: Placing the cut cathode sheets alternately on both sides of each anode sheet in the composite anode; The composite anode is folded according to the folding mark on the composite anode to form the laminated battery cell; the anode sheets and the cathode sheets in the laminated battery cell are alternately stacked, and the isolation membrane is located between the anode sheets and the cathode sheets.

10. The method according to claim 9, characterized in that The method of placing the cut cathode sheets alternately on both sides of each anode sheet in the composite anode comprises: When the composite anode is moved by the transmission device, the placement time of each cathode sheet obtained by cutting is obtained; According to the placement time, the cathode sheets are alternately placed on both sides of each anode sheet in the composite anode.

11. The method according to claim 10, characterized in that The step of obtaining the placement time of each cathode sheet obtained by cutting includes: Acquire the moving speed of the transmission device; The placement time of each cathode sheet obtained by cutting is determined according to the moving speed, the length of each anode sheet on the composite anode and the length of each cathode sheet obtained by cutting.

12. The method according to claim 11, characterized in that The step of determining the placement time of each cathode sheet obtained by cutting according to the moving speed, the length of each anode sheet on the composite anode, and the length of each cathode sheet obtained by cutting comprises: For any cathode sheet, determining the placement position of the cathode sheet in the target anode sheet according to the length of the cathode sheet and the length of the target anode sheet corresponding to the cathode sheet; The placement time of the cathode sheet is determined according to the time when the starting position of the target anode sheet is detected, the moving speed of the transmission device and the placement position.

13. The method according to claim 10, characterized in that The step of obtaining the placement time of each cathode sheet obtained by cutting includes: For any cathode sheet, obtaining a length change of the cathode sheet relative to a preset cathode sheet length; Determining a change in placement time according to the length change and the moving speed of the transmission device; According to the change in the placement time, the preset placement time of the cathode sheet is adjusted to obtain the placement time of the cathode sheet.

14. A laminated battery cell, characterized in that: The laminated battery cell comprises: a plurality of anode sheets and a plurality of cathode sheets; a separator is attached to both sides of each of the anode sheets; The anode sheets and the cathode sheets are alternately stacked, and the isolation membrane is located between the anode sheets and the cathode sheets; wherein the lengths of the first anode sheet and the last anode sheet in the stacked battery cell are both shorter than the length of the middle anode sheet.

15. The laminated battery cell according to claim 14, characterized in that: The difference between the total length of the first anode sheet and the last anode sheet and the standard total length of the first and last anode sheets is equal to the difference between the total length of each of the middle anode sheets and the standard total length of the middle anode sheets; Among them, the standard total length of the first and last anode sheets is the sum of the lengths of the first anode sheet and the last anode sheet, which are both preset anode sheet lengths; the standard total length of the middle anode sheets is the sum of the lengths of the preset anode sheet lengths of all the middle anode sheets.

16. The laminated battery cell according to claim 14 or 15, characterized in that: Each cathode sheet in the laminated battery cell is centrally arranged relative to the corresponding anode sheet.

17. A battery cell manufacturing system, characterized in that: The system comprises: a control device, a cutting device and an operating device; wherein the control device communicates with the cutting device and the operating device respectively; The control device is used to control the cutting device to cut the cathode to be cut in response to the battery cell production instruction, and control the operating device to place the cut cathode sheets on each anode sheet on the composite anode to form a stacked battery cell; isolation films are attached to both sides of the composite anode, and the lengths of the first anode sheet and the tail anode sheet are both shorter than the length of the middle anode sheet.

18. A battery cell manufacturing device, characterized in that: The device comprises: A cutting execution module, used for cutting the cathode to be cut in response to the cell manufacturing instruction; The pole piece folding module is used to place the cut cathode pieces on each anode piece on the composite anode to form a stacked battery cell; isolation films are attached to both sides of the composite anode, and the lengths of the first anode piece and the tail anode piece are both shorter than the length of the middle anode piece.

19. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 13 are implemented.

20. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 13 are implemented.

21. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 13 are implemented.

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