Battery top cap welding method and system

Abstract

A battery top cap welding method and system. A programmable logic controller is used for: when battery cell press-fitting is performed on the current battery cell (5) and the size of the current battery cell (5) is different from the size of a previous battery cell, controlling a press-fitting device to cause the current battery cell (5) to move to a pre-press-fitting position; controlling the movement of a press-fitting mechanism (8) of the press-fitting device to perform press-fitting on the current battery cell (5) at the pre-press-fitting position; when the press-fitting mechanism (8) stops moving as a pressure value applied to the current battery cell (5) reaches a preset value, acquiring the movement displacement of the press-fitting mechanism (8); and calculating a change value between the movement displacement of the press-fitting mechanism (8) and a preset movement displacement, wherein the change value is used for performing displacement compensation on battery cell press-fitting and processes after the battery cell press-fitting in top cap welding.

Description

Battery top cover welding method and system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on Chinese patent application number 202410120089.9, application date January 29, 2024, and invention name “A method and system for welding a battery top cover”, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this disclosure as a reference. Technical Field

[0003] The present disclosure relates to an automatic mold changing technology during the production process of a battery, and more particularly to a battery top cover welding method and system. Background Art

[0004] At present, in the relevant technology, in the production process of batteries, when different types of battery cells are produced by top cover welding, the battery cells need to be manually re-clamped and positioned after the fixture is replaced. This requires high personnel capabilities and subjective judgment is prone to errors. In addition, the battery cell pressing, gap detection, welding, rolling and post-weld inspection stations are individually clamped and positioned through the collaboration of multiple people. Such adjustments and changes in multiple stations require a lot of manpower and are time-consuming. In particular, the participation of multiple people in the adjustment is prone to uneven quality, which leads to low production efficiency in top cover welding. It can be seen that the existing top cover welding has the technical problem of low production efficiency.

[0005] Summary of the Invention

[0006] The embodiments of the present disclosure provide a battery top cover welding method and system, which can improve the production efficiency of battery cells in top cover welding.

[0007] The technical solution of the present disclosure is achieved as follows:

[0008] The present disclosure provides a battery top cover welding system, including a programmable logic controller and a press-fit device, wherein the programmable logic controller is configured to:

[0009] When the current battery cell is press-fitted and the size of the current battery cell is different from that of the previous battery cell, the press-fitting device is controlled to move the current battery cell to the pre-press-fitting position;

[0010] Control the movement of the pressing mechanism of the pressing equipment to press the current battery cell in the pre-pressing position;

[0011] When the pressure value on the current battery cell reaches a preset value and the pressing mechanism stops moving, the movement displacement of the pressing mechanism is obtained;

[0012] The change value between the movement displacement of the pressing mechanism and the preset movement displacement is calculated; wherein the change value is used to compensate for the displacement of the battery cell pressing and the post-cell pressing process during the top cover welding; the post-cell pressing process includes: gap detection, battery cell pre-welding, battery cell full welding, battery cell rolling and post-rolling detection.

[0013] When pressing the battery cells, the programmable logic controller is used to pre-press the current battery cell, which is determined to be a different size from the previous battery cell, and then press-fit it until the pressure value on the current battery cell reaches a preset value, causing the pressing mechanism to stop moving. The movement displacement of the pressing mechanism is obtained, and the change value between the preset movement displacement and the preset displacement is calculated to perform displacement compensation for the battery cell pressing and post-pressing processes in the top cover welding. In this way, when producing battery cells of different sizes in the top cover welding, different battery cells can be clamped and positioned intelligently, avoiding the time-consuming and labor-intensive manual work and the problem of errors, thereby improving the production efficiency of the battery cells in the top cover welding.

[0014] In an optional embodiment, the programmable logic controller is further configured to:

[0015] Get the batch number of the current battery cell;

[0016] When the batch number of the current battery cell is different from the batch number of the previous battery cell, it is determined that the size of the current battery cell is different from the size of the previous battery cell.

[0017] In this way, the programmable logic controller is used to determine whether the current battery cell is a new battery cell by comparing the batch number of the current battery cell with the batch number of the previous battery cell, and then use the battery top cover welding method proposed in the embodiment of the present disclosure to weld the top cover of the battery cell for the new battery cell, thereby improving the production efficiency of the battery cell in the top cover welding.

[0018] In an optional embodiment, the programmable logic controller is further configured to:

[0019] When the batch number of the current battery cell is the same as the batch number of the previous battery cell, it is determined that the size of the current battery cell is the same as the size of the previous battery cell.

[0020] In this way, the programmable logic controller is used to determine that the two battery cells are the same size when the batch number of the current battery cell is the same as the batch number of the previous battery cell, thereby not triggering the battery top cover welding method of the embodiment of the present disclosure to press-fit the battery cells. Only when they are different, the battery top cover welding method of the embodiment of the present disclosure is used to press-fit the battery cells, which helps to improve the production efficiency of the battery cells in the top cover welding.

[0021] In an optional embodiment, the battery top cover welding system further includes: a feeding device; a programmable logic controller, specifically configured to:

[0022] Get the QR code of the current battery cell from the loading device;

[0023] Determine the batch number of the current battery cell based on the QR code of the current battery cell.

[0024] In this way, the programmable logic controller is used to obtain the batch number of the current battery cell through the QR code of the current battery cell, and then determine whether the current battery cell is a new type of battery cell, which is conducive to improving the production efficiency of the battery cell in the top cover welding.

[0025] In an optional embodiment, the press-fitting device includes: a fixing mechanism; and a programmable logic controller, specifically configured to:

[0026] When the current battery cell is press-fitted, if it is determined that the size of the current battery cell is different from the size of the previous battery cell, the fixing mechanism is controlled to fix the current battery cell and then move the current battery cell to the pre-press-fitting position.

[0027] In this way, the programmable logic controller is used to first fix the current battery cell by controlling the fixing mechanism, and then move the current battery cell to the pre-pressing position. In this way, damage to the current battery cell caused by direct pressing of the current battery cell is prevented, thereby improving the production efficiency of the battery cell during top cover welding.

[0028] In an optional embodiment, the press-fitting mechanism includes: an X-direction press-fitting assembly, a Y-direction press-fitting assembly, and a Z-direction press-fitting assembly; and a programmable logic controller, specifically configured to:

[0029] The X-direction press-fitting assembly, the Y-direction press-fitting assembly and the Z-direction press-fitting assembly are controlled to move respectively so that the X-direction press-fitting assembly, the Y-direction press-fitting assembly and the Z-direction press-fitting assembly press-fit the current battery cell at the pre-press-fitting position.

[0030] In this way, the programmable logic controller is used to press-fit the current battery cell in the pre-pressing position by controlling the movement of the X-axis press-fitting assembly, the Y-axis press-fitting assembly and the Z-axis press-fitting assembly respectively, so that the current battery cell can be further pressurized after the pre-pressing, thereby realizing the press-fitting of the current battery cell, thereby improving the production efficiency of the battery cell in the top cover welding.

[0031] In an optional embodiment, the programmable logic controller is specifically configured to:

[0032] When the pressure value from the X-direction press-fitting assembly on the current battery cell reaches a preset first pressure value so that the X-direction press-fitting assembly stops moving, and the pressure value from the Y-direction press-fitting assembly on the current battery cell reaches a preset second pressure value so that the Y-direction press-fitting assembly stops moving, and the pressure value from the Z-direction press-fitting assembly on the current battery cell reaches a preset third pressure value so that the Z-direction press-fitting assembly stops moving, the movement displacement of the X-direction press-fitting assembly, the movement displacement of the Y-direction press-fitting assembly, and the movement displacement of the Z-direction press-fitting assembly are obtained.

[0033] In this way, the programmable logic controller can know the movement displacement of the press-fitted components in different directions, which helps to determine the change value from the preset movement displacement, thereby helping to improve the production efficiency of the battery cells in the top cover welding.

[0034] In an optional embodiment, the press-fitting mechanism is further provided with a pressure module, wherein the pressure module is configured as follows:

[0035] Collect the pressure value applied by the pressing mechanism to the current battery cell;

[0036] When the pressure value reaches the preset value, a control signal is sent to the servo probe of the press-fitting equipment;

[0037] The servo probe of the press-fitting equipment is used to control the press-fitting mechanism to stop moving according to the control signal.

[0038] In this way, the servo probe is controlled by pressure sensing, and the servo probe controls the press-fitting mechanism to stop moving, so as to stop the press-fitting of the current battery cell in a timely manner, thereby preventing the current battery cell from being damaged during press-fitting.

[0039] In an optional embodiment, the preset movement displacement includes: an X-direction preset displacement, a Y-direction preset displacement, and a Z-direction preset displacement; the programmable logic controller is specifically configured to:

[0040] Calculate the X-direction difference between the X-direction displacement of the press-fit component and the X-direction preset displacement;

[0041] Calculate the Y-direction difference between the Y-direction displacement of the press-fit component and the Y-direction preset displacement;

[0042] Calculate the Z-direction difference between the moving displacement of the Z-direction press-fit component and the Z-direction preset displacement;

[0043] The X-direction difference, the Y-direction difference, and the Z-direction difference are determined as the change value between the movement displacement of the press-fitting mechanism and the preset movement displacement.

[0044] In this way, the time-consuming and labor-intensive problem of large errors caused by clamping and positioning different types of battery cells is avoided, thereby improving the production efficiency of the battery cells in the top cover welding.

[0045] The present disclosure provides a battery top cover welding method, which is applied to a battery top cover welding system. The battery top cover welding system includes: a programmable logic controller and a press-fit device. The method includes:

[0046] When the current battery cell is press-fitted and the size of the current battery cell is different from that of the previous battery cell, the programmable logic controller controls the press-fitting equipment to move the current battery cell to the pre-press-fitting position;

[0047] The programmable logic controller controls the movement of the pressing mechanism of the pressing equipment to press the current battery cell in the pre-pressing position;

[0048] When the pressure value on the current battery cell reaches a preset value and the pressing mechanism stops moving, the programmable logic controller obtains the movement displacement of the pressing mechanism;

[0049] A programmable logic controller calculates a change in displacement between a pressing mechanism and a preset displacement; the change is used to perform displacement compensation for the cell pressing and post-cell pressing processes during top cover welding; the post-cell pressing processes include gap detection, cell pre-welding, cell full welding, cell rolling, and post-rolling detection.

[0050] When pressing the battery cells, the programmable logic controller will pre-press the current battery cell, which is determined to be of a different size from the previous battery cell, and then press-fit it until the pressure value on the current battery cell reaches a preset value, causing the pressing mechanism to stop moving. The movement displacement of the current battery cell in the pressing mechanism is obtained, and the change value between the preset movement displacement and the preset movement displacement is calculated to perform displacement compensation for the battery cell pressing and post-pressing processes in the top cover welding. In this way, when producing battery cells of different sizes in the top cover welding, different battery cells can be clamped and positioned intelligently, avoiding the time-consuming and labor-intensive manual work and the problem of errors, thereby improving the production efficiency of the battery cells in the top cover welding.

[0051] In an optional embodiment, the above method further includes:

[0052] The programmable logic controller obtains the batch number of the current battery cell;

[0053] When the batch number of the current battery cell is different from the batch number of the previous battery cell, the programmable logic controller determines that the size of the current battery cell is different from the size of the previous battery cell.

[0054] In this way, by comparing the batch number of the current battery cell with the batch number of the previous battery cell, it is determined whether the current battery cell is a new battery cell, and then the battery top cover welding method proposed in the embodiment of the present disclosure is used to weld the top cover of the battery cell for the new battery cell, thereby improving the production efficiency of the battery cell in the top cover welding.

[0055] In an optional embodiment, the above method further includes:

[0056] When the batch number of the current battery cell is the same as the batch number of the previous battery cell, the programmable logic controller determines that the size of the current battery cell is the same as the size of the previous battery cell.

[0057] In this way, the programmable logic controller determines that the two battery cells are the same size when the batch number of the current battery cell is the same as the batch number of the previous battery cell, thereby not triggering the battery top cover welding method of the embodiment of the present disclosure to press-fit the battery cells. Only when they are different, the battery top cover welding method of the embodiment of the present disclosure is used to press-fit the battery cells, which helps to improve the production efficiency of the battery cells in the top cover welding.

[0058] In an optional embodiment, the battery top cover welding system further includes: a loading device; and a programmable logic controller obtains the batch number of the current battery cell, including:

[0059] The programmable logic controller obtains the QR code of the current battery cell from the loading device;

[0060] The programmable logic controller determines the batch number of the current battery cell according to the QR code of the current battery cell.

[0061] In this way, the batch number of the current battery cell can be obtained through the QR code of the current battery cell, and then it can be determined whether the current battery cell is a new type of battery cell, which is conducive to improving the production efficiency of the battery cell in the top cover welding.

[0062] In an optional embodiment, the press-fitting device includes: a fixing mechanism; when the current battery cell is press-fitted, if the programmable logic controller determines that the size of the current battery cell is different from the size of the previous battery cell, controlling the press-fitting device to move the current battery cell to a pre-press-fitting position, including:

[0063] When the current battery cell is press-fitted and the size of the current battery cell is different from that of the previous battery cell, the programmable logic controller controls the fixing mechanism to fix the current battery cell and then moves the current battery cell to the pre-press-fitting position.

[0064] In this way, the current battery cell is first fixed by the fixing mechanism, and then the current battery cell is moved to the pre-pressing position, so that the current battery cell is pre-pressed. In this way, damage to the current battery cell caused by direct pressing of the current battery cell is prevented, thereby improving the production efficiency of the battery cell in the top cover welding.

[0065] In an optional embodiment, the press-fitting mechanism includes: an X-direction press-fitting assembly, a Y-direction press-fitting assembly, and a Z-direction press-fitting assembly. The programmable logic controller controls the movement of the press-fitting mechanism of the press-fitting device to press-fit the current battery cell in the pre-press-fitting position, including:

[0066] The programmable logic controller controls the movement of the X-direction press-fitting assembly, the Y-direction press-fitting assembly and the Z-direction press-fitting assembly respectively, so that the X-direction press-fitting assembly, the Y-direction press-fitting assembly and the Z-direction press-fitting assembly press the current battery cell at the pre-pressing position.

[0067] In this way, by controlling the movement of the X-axis press-fitting assembly, the Y-axis press-fitting assembly and the Z-axis press-fitting assembly respectively to press-fit the current battery cell, the current battery cell can be further pressurized after pre-pressing, thereby realizing the press-fitting of the current battery cell in the pre-pressing position, thereby improving the production efficiency of the battery cell in the top cover welding.

[0068] In an optional embodiment, when the pressure value on the current battery cell reaches a preset value and causes the pressing mechanism to stop moving, the programmable logic controller obtains the displacement of the current battery cell in the pressing mechanism, including:

[0069] When the pressure value from the X-direction press-fitting assembly on the current battery cell reaches a preset first pressure value, causing the X-direction press-fitting assembly to stop moving, and the pressure value from the Y-direction press-fitting assembly on the current battery cell reaches a preset second pressure value, causing the Y-direction press-fitting assembly to stop moving, and the pressure value from the Z-direction press-fitting assembly on the current battery cell reaches a preset third pressure value, causing the Z-direction press-fitting assembly to stop moving, the programmable logic controller obtains the movement displacement of the X-direction press-fitting assembly, the movement displacement of the Y-direction press-fitting assembly, and the movement displacement of the Z-direction press-fitting assembly.

[0070] In this way, the movement displacement of the press-fit assembly in different directions can be known, which helps to determine the change value from the preset movement displacement, thereby helping to improve the production efficiency of the battery cell in the top cover welding.

[0071] In an optional embodiment, the press-fitting mechanism is further provided with a pressure module, and the above method further comprises:

[0072] The pressure module collects the pressure value applied to the current battery cell by the pressing mechanism;

[0073] When the pressure value reaches the preset value, the pressure module sends a control signal to the servo probe of the press-fitting equipment;

[0074] The servo probe of the press-fitting device controls the press-fitting mechanism to stop moving according to the control signal.

[0075] In this way, the servo probe is controlled by the pressure module, and the servo probe controls the press-fitting mechanism to stop moving, so as to stop the press-fitting of the current battery cell in a timely manner to prevent the current battery cell from being damaged during the press-fitting.

[0076] In an optional embodiment, the preset displacement includes: an X-direction preset displacement, a Y-direction preset displacement, and a Z-direction preset displacement; the programmable logic controller calculates a change value between the current displacement of the battery cell in the press-fitting mechanism and the preset displacement, including:

[0077] The programmable logic controller calculates the X-direction difference between the movement displacement of the press-fit component in the X-direction and the preset X-direction displacement;

[0078] The programmable logic controller calculates the Y-direction difference between the moving displacement of the press-fit component in the Y-direction and the preset Y-direction displacement;

[0079] The programmable logic controller calculates the Z-direction difference between the moving displacement of the Z-direction press-fit component and the Z-direction preset displacement;

[0080] The programmable logic controller determines the X-direction difference, the Y-direction difference and the Z-direction difference as the change value between the movement displacement of the press-fitting mechanism and the preset movement displacement.

[0081] In this way, the time-consuming and labor-intensive problem of large errors caused by clamping and positioning different types of battery cells is avoided, thereby improving the production efficiency of the battery cells in the top cover welding.

[0082] The present disclosure provides a battery top cover welding method and system, the system comprising: a programmable logic controller and a pressing device, the programmable logic controller being configured to: when pressing a current battery cell, if it is determined that the size of the current battery cell is different from the size of the previous battery cell, control the pressing device to move the current battery cell to a pre-pressing position, control the pressing mechanism of the pressing device to move, and press the current battery cell at the pre-pressing position; when the pressure value on the current battery cell reaches a preset value, causing the pressing mechanism to stop moving, obtain the displacement of the pressing mechanism, calculate the change between the displacement of the pressing mechanism and the preset displacement, and use the change value to perform displacement compensation for the pressing and post-pressing processes of the battery cell in the top cover welding process, the post-pressing process comprising: Gap detection, battery cell pre-welding, battery cell full welding, battery cell rolling and post-rolling detection; that is, in the embodiment of the present disclosure, when pressing the battery cells, the programmable logic controller pre-presses the current battery cell determined to be a different size from the previous battery cell, and then presses it until the pressure value on the current battery cell reaches a preset value, causing the pressing mechanism to stop moving, and obtains the movement displacement of the pressing mechanism, and calculates the change value between the preset movement displacement, so as to perform displacement compensation for the battery cell pressing and post-cell pressing processes in the top cover welding. In this way, when producing battery cells of different sizes in the top cover welding, different battery cells can be intelligently clamped and positioned, avoiding the problem of manual time-consuming and labor-intensive work and errors, thereby improving the production efficiency of the battery cells in the top cover welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] FIG1 is a schematic diagram of a process flow of a top cover welding process in the related art;

[0084] FIG2 is a schematic structural diagram of an optional battery top cover welding system provided in an embodiment of the present disclosure;

[0085] FIG3 is a schematic flow chart of an optional battery top cover welding method provided in an embodiment of the present disclosure;

[0086] FIG4 is a schematic flow chart of an example of an optional battery top cover welding method provided in an embodiment of the present disclosure;

[0087] FIG5 is a schematic structural diagram of an optional press-fitting device provided in an embodiment of the present disclosure, in which a battery cell is currently in a press-fitting position, but an X-direction press-fitting assembly, a Y-direction press-fitting assembly, and a Z-direction press-fitting assembly are not press-fitted;

[0088] FIG6 is a schematic structural diagram of an X-direction press-fitting assembly and a Y-direction press-fitting assembly in an optional press-fitting device provided in an embodiment of the present disclosure;

[0089] FIG7 is a schematic structural diagram of an optional press-fitting device provided in an embodiment of the present disclosure, in which a current battery cell is in a press-fitting position, and an X-direction press-fitting assembly, a Y-direction press-fitting assembly, and a Z-direction press-fitting assembly are press-fitting the current battery cell;

[0090] FIG8 is a schematic structural diagram of an optional press-fitting device provided in an embodiment of the present disclosure, in which a current battery cell is in a press-fitting position, and an X-direction press-fitting assembly and a Y-direction press-fitting assembly are press-fitting the current battery;

[0091] FIG9 is a schematic structural diagram of an optional press-fitting device provided in an embodiment of the present disclosure, in which a current battery cell is in a press-fitting position and a Y-direction press-fitting assembly presses the current battery.

[0092] Reference numerals:

[0093] 5-current battery cell; 6-bracket; 7-fixing mechanism; 71-fixing part; 8-pressing mechanism; 81-X-direction press-fitting assembly; 811-first X-direction driving part; 812-second X-direction driving part; 813-first X-direction press-fitting part; 814-second X-direction press-fitting part; 815-X-direction moving part; 82-Y-direction press-fitting assembly; 821-Y-direction driving part; 822-Y-direction press-fitting part; 823-Y-direction moving part; 83-Z-direction press-fitting assembly; 831-Z-direction driving part; 832-Z-direction press-fitting part; 833-Z-direction moving part. DETAILED DESCRIPTION

[0094] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present disclosure.

[0095] During the production of batteries, it is necessary to perform top cover welding on the battery cells. FIG1 is a schematic diagram of a top cover welding process in the related art. As shown in FIG1 , the top cover welding process may include:

[0096] S101: battery cell loading;

[0097] S102: Battery cell press-fitting;

[0098] S103: gap detection;

[0099] S104: pre-welding of battery cells;

[0100] S105: Battery cells are fully welded;

[0101] S106: cell rolling;

[0102] S107: Post-roll detection.

[0103] That is to say, in the top cover welding, the battery cells are first loaded to obtain the battery cells, and then the battery cells are pressed to obtain the pressed battery cells, and then the gap detection is performed on the pressed battery cells to obtain the battery cells after gap detection, the battery cells after gap detection are pre-welded to obtain the pre-welded battery cells, the pre-welded battery cells are fully welded to obtain the fully welded battery cells, the fully welded battery cells are roll-pressed to obtain the rolled battery cells, and the rolled battery cells are post-roll-detected to obtain the post-roll-detected battery cells. It should be noted that after the above-mentioned post-roll detection, other processes of top cover welding are also included, and the top cover welding process is not limited to this.

[0104] In the related art, during top cover welding, for different types of battery cells, manual clamping and positioning are required in S102-S107, which is time-consuming and labor-intensive, and also affects the production efficiency of the battery cells during top cover welding.

[0105] In order to improve the production efficiency of battery cells in top cover welding, a battery top cover welding method is provided in an embodiment of the present disclosure, and the method is applied to a battery top cover welding system. Figure 2 is a structural schematic diagram of an optional battery top cover welding system provided in an embodiment of the present disclosure. As shown in Figure 2, the battery top cover welding system 200 may include: a programmable logic controller (PLC) 21 and a pressing device 22; wherein the programmable logic controller 21 has a communication connection with the pressing device 22, the programmable logic controller 21 is used to control the pressing device 22, and the pressing device 22 is used to perform the battery cell pressing process under the control of the programmable logic controller 21.

[0106] Based on the battery top cover welding system 200 provided in FIG. 2 , an embodiment of the present disclosure provides a battery top cover welding method. FIG. 3 is a flow chart of an optional battery top cover welding method provided in an embodiment of the present disclosure. As shown in FIG. 3 , the battery top cover welding method may include:

[0107] S301: When the current battery cell is press-fitted and the size of the current battery cell is different from that of the previous battery cell, the programmable logic controller controls the press-fitting device to move the current battery cell to the pre-press-fitting position;

[0108] In S301, for the current battery cell in the top cover welding, the loading equipment first loads the battery cell to obtain the current battery cell, and then the pressing equipment presses the current battery cell. When the current battery cell is press-fitted, the programmable logic controller first determines whether the size of the current battery cell is the same as the size of the previous battery cell. If they are the same, it means that the current battery cell is the same model as the previous battery cell, then there is no need to re-clamp and position in S102-S107, and it is only necessary to perform top cover welding according to the process of the previous battery cell. If they are different, it means that the current battery cell is a different model from the previous battery cell, then it is necessary to re-clamp and position in S102-S107. Here, in order to avoid the impact of manual repositioning on production efficiency, in the embodiment of the present disclosure, when the size of the current battery cell is different from the size of the previous battery cell, the programmable logic controller controls the pressing equipment to move the current battery cell to the pre-pressing position.

[0109] The press-fitting device is provided with a fixed component. Here, the programmable logic controller controls the fixed component of the press-fitting device to move the current battery cell to the pre-press-fitting position.

[0110] S302: The programmable logic controller controls the pressing mechanism of the pressing device to move to press the current battery cell at the pre-pressing position;

[0111] After the programmable logic controller moves the current battery cell to the pre-pressing position through S301, the programmable logic controller controls the movement of the pressing mechanism. Here, the programmable logic controller controls the operation of the pressing mechanism to move the pressing mechanism, thereby realizing the pressing of the current battery cell.

[0112] Among them, the above-mentioned pressing mechanism includes: X-direction pressing assembly, Y-direction pressing assembly and Z-direction pressing assembly. The programmable logic controller controls the movement of the X-direction pressing assembly, Y-direction pressing assembly and Z-direction pressing assembly in the pressing mechanism respectively, thereby realizing the pressing of the current battery cell in the pre-pressing position.

[0113] S303: When the pressure value on the current battery cell reaches a preset value and the pressing mechanism shaft stops moving, the programmable logic controller obtains the movement displacement of the pressing mechanism;

[0114] In S302, the programmable logic controller controls the movement of the pressing mechanism to realize the pressing of the current battery cell in the pre-pressing position. A pressure module installed on the pressing mechanism can be used to detect the pressure value on the current battery cell. Only when the pressure value on the current battery cell reaches a preset value and the pressing mechanism stops moving, the programmable logic controller detects that the pressing mechanism stops moving. The programmable logic controller can obtain the movement displacement of the pressing mechanism. Here, the movement displacement between the initial position and the stop position of the pressing mechanism is obtained.

[0115] The movement displacement of the press-fitting mechanism may include: movement displacement of the press-fitting assembly in the X direction, movement displacement of the press-fitting assembly in the Y direction, and movement displacement of the press-fitting assembly in the Z direction.

[0116] In addition, the preset values ​​may include: a preset first pressure value corresponding to the X-direction press-fitting assembly, a preset second pressure value corresponding to the Y-direction press-fitting assembly, and a preset third pressure value corresponding to the Z-direction press-fitting assembly.

[0117] S304: The programmable logic controller calculates a change value between the movement displacement of the pressing mechanism and a preset movement displacement.

[0118] In S304, after obtaining the movement displacement of the pressing mechanism, the programmable logic controller can calculate the change value between the movement displacement of the pressing mechanism and the preset movement displacement, wherein the change value is used to perform displacement compensation for the battery cell pressing and the process after the battery cell pressing in the top cover welding; wherein the above-mentioned preset movement displacement can be a standard battery cell determined by actual experience, and the standard battery cell is pressed. After pressing into place, the movement displacement of the X-axis pressing component when the standard battery cell is pressed is recorded, the movement displacement of the Y-axis pressing component when the standard battery cell is pressed is recorded, and the movement displacement of the Z-axis pressing component when the standard battery cell is pressed is recorded, that is, (X', Y', Z'), which can be used as the preset movement displacement.

[0119] Among them, the process after the battery cell is pressed includes: gap detection, battery cell pre-welding, battery cell full welding, battery cell rolling and post-rolling detection. That is to say, after calculating the change value between the movement displacement of the pressing mechanism and the preset movement displacement, the change value can be used to perform displacement compensation in S102 to press-fit the subsequent battery cells with the same size as the current battery cell. The change value can also be used to perform displacement compensation in S103-S107 to perform the process after the battery cell is pressed on the battery cell with the same size as the current battery cell, thereby avoiding the time-consuming and labor-intensive problems with large errors caused by manual clamping and positioning, thereby improving the production efficiency of the battery cells in the top cover welding.

[0120] In order to determine whether the size of the current battery cell is the same as the size of the previous battery cell, in an optional embodiment, the method may further include:

[0121] The programmable logic controller obtains the batch number of the current battery cell;

[0122] When the batch number of the current battery cell is different from the batch number of the previous battery cell, the programmable logic controller determines that the size of the current battery cell is different from the size of the previous battery cell.

[0123] It can be understood that the programmable logic controller first obtains the batch number of the current battery cell. The batch number here is generally obtained by identifying the QR code of the current battery cell. Then, after obtaining the batch number of the current battery cell, the batch number of the current battery cell is compared with the batch number of the previous battery cell. When the comparison shows that the batch number of the current battery cell is different from the batch number of the previous battery cell, that is, they do not belong to the same batch of battery cells, it is determined that the size of the current battery cell is different from the size of the previous battery cell, that is, the current battery cell is a new type of battery cell.

[0124] In this way, by comparing the batch number of the current battery cell with the batch number of the previous battery cell, it is determined whether the current battery cell is a new battery cell, and then the battery top cover welding method proposed in the embodiment of the present disclosure is used to weld the top cover of the battery cell for the new battery cell, thereby improving the production efficiency of the battery cell in the top cover welding.

[0125] In an optional embodiment, the above method may further include:

[0126] When the batch number of the current battery cell is the same as the batch number of the previous battery cell, the programmable logic controller determines that the size of the current battery cell is the same as the size of the previous battery cell.

[0127] It can be understood that when the batch number of the current battery cell is the same as the batch number of the previous battery cell after comparison, that is, they belong to the same batch of battery cells, it is determined that the size of the current battery cell is the same as the size of the previous battery cell, that is, the current battery cell is not a new type of battery cell.

[0128] In this way, the programmable logic controller is used to determine that the two battery cells are the same size when the batch number of the current battery cell is the same as the batch number of the previous battery cell, thereby not triggering the battery top cover welding method of the embodiment of the present disclosure to press-fit the battery cells. Only when they are different, the battery top cover welding method of the embodiment of the present disclosure is used to press-fit the battery cells, which helps to improve the production efficiency of the battery cells in the top cover welding.

[0129] Furthermore, in order to obtain the batch number of the current battery cell, in an optional embodiment, the battery top cover welding system may further include: a loading device; the programmable logic controller obtains the batch number of the current battery cell, which may include:

[0130] The programmable logic controller obtains the QR code of the current battery cell from the loading device;

[0131] The programmable logic controller determines the batch number of the current battery cell according to the QR code of the current battery cell.

[0132] It can be understood that in the top cover welding, the battery cell loading is also included before the battery cell is pressed, wherein the battery cell loading is completed by a loading device, wherein, after obtaining the current battery cell, the loading device obtains the QR code of the current battery cell and sends the QR code to the programmable logic controller. After obtaining the QR code of the current battery cell, the programmable logic controller recognizes the QR code and can obtain the batch number of the current battery cell.

[0133] In this way, the batch number of the current battery cell can be obtained through the QR code of the current battery cell, and then it can be determined whether the current battery cell is a new type of battery cell, which is conducive to improving the production efficiency of the battery cell in the top cover welding.

[0134] In order to realize press-fitting of the new battery cell, in an optional embodiment, the press-fitting equipment includes: a fixing mechanism; S301 may include:

[0135] When the current battery cell is press-fitted, the programmable logic controller determines that the size of the current battery cell is different from that of the previous battery cell, controls the fixing mechanism to fix the current battery cell and then moves the current battery cell to the pre-pressing position.

[0136] It can be understood that when the current battery cell is being pressed and installed, the programmable logic controller determines that the size of the current battery cell is different from the size of the previous battery cell, and controls the fixing mechanism to fix the current battery cell. After fixing the current battery cell, the fixing mechanism is controlled to move the current battery cell to the pre-pressing position; in this way, the current battery cell is moved to the pre-pressing position.

[0137] In this way, the current battery cell is first fixed by the fixing mechanism, and then the current battery cell is moved to the pre-pressing position, so that the current battery cell is pre-pressed. In this way, damage to the current battery cell caused by direct pressing of the current battery cell is prevented, thereby improving the production efficiency of the battery cell in the top cover welding.

[0138] After pre-pressing, in order to press-fit the current battery cell, in an optional embodiment, the press-fitting mechanism includes: an X-direction press-fitting assembly, a Y-direction press-fitting assembly, and a Z-direction press-fitting assembly. S302 may include:

[0139] The programmable logic controller controls the movement of the X-direction press-fitting assembly, the Y-direction press-fitting assembly and the Z-direction press-fitting assembly respectively, so that the X-direction press-fitting assembly, the Y-direction press-fitting assembly and the Z-direction press-fitting assembly press the current battery cell at the pre-pressing position.

[0140] It can be understood that after pre-pressing, the programmable logic controller controls the first X-axis drive and the second X-axis drive of the X-axis press-fitting assembly respectively to move the first X-axis press-fitting assembly and the second X-axis press-fitting assembly, controls the Y-axis drive of the Y-axis press-fitting assembly to move the Y-axis press-fitting assembly, and controls the Z-axis drive of the Z-axis press-fitting assembly to move the Z-axis press-fitting assembly. Here, the first X-axis drive, the second X-axis drive, the Y-axis drive and the Z-axis drive can be controlled to move simultaneously to press the current battery cell.

[0141] In this way, by controlling the movement of the X-axis press-fitting assembly, the Y-axis press-fitting assembly and the Z-axis press-fitting assembly respectively, the current battery cell in the pre-pressing position can be press-fitted, so that the current battery cell can be further pressurized after the pre-pressing, thereby realizing the press-fitting of the current battery cell, thereby improving the production efficiency of the battery cell in the top cover welding.

[0142] In order to complete the press-fitting of the current battery cell and intelligently complete the replacement of different battery cells, in an optional embodiment, S303 may include:

[0143] When the pressure value from the X-direction press-fitting assembly on the current battery cell reaches a preset first pressure value, causing the X-direction press-fitting assembly to stop moving, and the pressure value from the Y-direction press-fitting assembly on the current battery cell reaches a preset second pressure value, causing the Y-direction press-fitting assembly to stop moving, and the pressure value from the Z-direction press-fitting assembly on the current battery cell reaches a preset third pressure value, causing the Z-direction press-fitting assembly to stop moving, the programmable logic controller obtains the movement displacement of the X-direction press-fitting assembly, the movement displacement of the Y-direction press-fitting assembly, and the movement displacement of the Z-direction press-fitting assembly.

[0144] It can be understood that for the X-direction press-fitting assembly, when the pressure value from the X-direction press-fitting assembly on the current battery cell reaches the preset first pressure value, the X-direction press-fitting assembly stops moving, and when the pressure value from the Y-direction press-fitting assembly on the current battery cell reaches the preset second pressure value, the Y-direction press-fitting assembly stops moving, and when the pressure value from the Z-direction press-fitting assembly on the current battery cell reaches the preset third pressure value, the Y-direction press-fitting assembly stops moving. At this time, it is determined that the current battery cell has been press-fitted. In order to intelligently complete the replacement of the current battery cell model and to facilitate the top cover welding of the next battery cell of the same model, the programmable logic controller obtains the movement displacement of the press-fitting assemblies in different directions.

[0145] The movement displacements of the press-fit components in different directions may include: movement displacement of the press-fit components in the X direction, movement displacement of the press-fit components in the Y direction, and movement displacement of the press-fit components in the Z direction.

[0146] In this way, the movement displacement of the press-fitted components in different directions can be known, which helps to determine the change value from the preset movement displacement, thereby helping to improve the production efficiency of the battery cells in the top cover welding.

[0147] Furthermore, in order to stop the pressing mechanism from moving when the pressure value of the current battery cell from the pressing mechanism reaches a preset value, in an optional embodiment, the pressing mechanism is further provided with a pressure module, and the above method may further include:

[0148] The pressure module collects the pressure value applied to the current battery cell by the pressing mechanism;

[0149] When the pressure value reaches the preset value, the pressure module sends a control signal to the servo probe of the press-fitting equipment;

[0150] The servo probe of the press-fitting device controls the press-fitting mechanism to stop moving according to the control signal.

[0151] It can be understood that a pressing part is provided on the pressing assembly of the pressing mechanism, and a pressure module is provided on the pressing part, wherein a pressure module corresponding to the X direction, a pressure module corresponding to the Y direction, and a pressure module corresponding to the Z direction, so that the pressure module corresponding to the X direction collects the pressure value applied to the current battery cell in the X direction, the pressure module corresponding to the Y direction collects the pressure value applied to the current battery cell in the Y direction, and the pressure module corresponding to the Z direction collects the pressure value applied to the current battery cell in the Z direction. Then, when the pressure value applied to the current battery cell by the pressure module corresponding to the X direction is greater than a first preset value, and the pressure value applied to the current battery cell by the pressure module corresponding to the Y direction is greater than a second preset value, and the pressure value applied to the current battery cell by the pressure module corresponding to the Z direction is greater than a third preset value, that is, when the pressure value reaches the preset value, the pressure module corresponding to the X direction sends a first control signal to the servo probe of the pressing device for the X direction, the pressure module corresponding to the Y direction sends a second control signal to the servo probe of the pressing device for the Y direction, and the pressure module corresponding to the Z direction sends a third control signal to the servo probe of the pressing device for the Z direction.

[0152] After receiving the first control signal, the X-direction servo probe controls the X-direction servo motor to stop working, so that the X-direction press-fitting assembly stops moving. After receiving the second control signal, the Y-direction servo probe controls the Y-direction servo motor to stop working, so that the Y-direction press-fitting assembly stops moving. After receiving the third control signal, the Z-direction servo probe controls the Z-direction servo motor to stop working, so that the Z-direction press-fitting assembly stops moving.

[0153] In this way, the pressure module controls the servo probe, which controls the servo motor so that the press-fitting mechanism can stop moving, thereby stopping the press-fitting of the current battery cell in a timely manner to prevent the current battery cell from being damaged during press-fitting.

[0154] In order to calculate the change value for displacement compensation in the process of pressing and installing the battery cells in the top cover welding and the process after pressing the battery cells, in an optional embodiment, the preset displacement includes: a preset displacement in the X direction, a preset displacement in the Y direction, and a preset displacement in the Z direction; the programmable logic controller calculates the change value between the displacement of the pressing mechanism and the preset displacement, which may include:

[0155] The programmable logic controller calculates the X-direction difference between the movement displacement of the press-fit component in the X-direction and the preset X-direction displacement;

[0156] The programmable logic controller calculates the Y-direction difference between the moving displacement of the press-fit component in the Y-direction and the preset Y-direction displacement;

[0157] The programmable logic controller calculates the Z-direction difference between the moving displacement of the Z-direction press-fit component and the Z-direction preset displacement;

[0158] The programmable logic controller determines the X-direction difference, the Y-direction difference and the Z-direction difference as the change value between the movement displacement of the press-fitting mechanism and the preset movement displacement.

[0159] It can be understood that after the programmable logic controller obtains the movement displacement of the press-fitting mechanism and pre-stores the preset movement displacement, that is, knows the preset movement displacement, then it can calculate the difference between the movement displacement of the X-direction press-fitting component and the preset X-direction displacement in the preset movement displacement, that is, the X-direction difference, calculate the difference between the movement displacement of the Y-direction press-fitting component and the preset Y-direction displacement, that is, the Y-direction difference, and calculate the difference between the movement displacement of the Z-direction press-fitting component and the preset Z-direction displacement, that is, the Z-direction difference.

[0160] The X-direction difference, Y-direction difference and Z-direction difference are determined as the above-mentioned change values. The change values ​​can be used to change the process of battery cell pressing, and the processes S102-S107 after battery cell pressing can also be changed to achieve displacement compensation for battery cell pressing and the processes after battery cell pressing.

[0161] In this way, the time-consuming and labor-intensive problem of large errors caused by clamping and positioning different types of battery cells is avoided, thereby improving the production efficiency of the battery cells in the top cover welding.

[0162] The following examples are used to describe the battery top cover welding method in one or more of the above embodiments.

[0163] FIG4 is a flow chart of an example of an optional battery top cover welding method provided by an embodiment of the present disclosure. As shown in FIG4 , the battery top cover welding method may include:

[0164] S401: Enter the battery cell press assembly;

[0165] Specifically, when the top cover of the battery cell is welded, the PLC controls the loading equipment to load the battery cell, obtain the current battery cell, and press-fit the battery cell.

[0166] S402: Determine whether it is a new type of battery cell. If not, execute S403; if yes, execute S404;

[0167] S403: Execute the original process.

[0168] Specifically, the PLC identifies the QR code of the current battery cell obtained from the loading equipment to obtain the batch number of the current battery cell, and compares whether the batch number of the current battery cell is the same as the batch number of the previous battery cell. If they are the same, the original process is executed, that is, the process of the same size and model as the previous battery cell is executed. If they are different, the current battery cell is determined to be a new type of battery cell, and S404 is executed.

[0169] S404: The current battery cell quickly reaches the pre-pressing position;

[0170] Specifically, the pressing device is provided with a fixing mechanism, which fixes the current battery cell and then moves the current battery cell to the pre-pressing position.

[0171] S405: X / Y / Z direction synchronous press-fitting;

[0172] Specifically, after the current battery cell moves to the pre-pressing position, the PLC controls the movement of the X-axis press-fitting assembly, while the PLC controls the movement of the Y-axis press-fitting assembly and the PLC controls the movement of the Z-axis press-fitting assembly, so that the X / Y / Z directions are pressed synchronously.

[0173] S406: Determine whether the press-fitting pressure is in place. If yes, execute S407; if no, execute S405.

[0174] S407: The servo probe function triggers the press mechanism to stop;

[0175] Specifically, the PLC determines whether the press-fitting pressure in the X / Y / Z directions is in place, wherein the pressure module corresponding to the X direction determines whether the press-fitting pressure in the X direction reaches a preset first pressure value, the pressure module corresponding to the Y direction determines whether the press-fitting pressure in the Y direction reaches a preset second pressure value, and the pressure module corresponding to the Z direction determines whether the press-fitting pressure in the Z direction reaches a preset third pressure value. If all are in place, the pressure module in each direction sends a control signal to the servo probe in each direction to trigger the servo probe function in each direction to stop the movement of the press-fitting mechanism.

[0176] S408: Recording X / Y / Z displacement;

[0177] S409: Establishing a cell model;

[0178] S410: Determine Δx, Δy, and Δz.

[0179] Specifically, after the pressing mechanism stops, the PLC records the displacement of the pressing mechanism in the X / Y / Z directions, that is, (X1, Y1, Z1), and establishes a cell model based on this. Since the movement displacement of the standard cell after being pressed into place is (X', Y', Z'), then Δx = X1-X', Δy = Y1-Y', Δz = Z1-Z'; based on this, displacement compensation for S102 and S103-S107 is achieved.

[0180] That is to say, in this example, when the new lithium battery enters the top cover welding equipment for the first time, the battery to be pressed at the S101 station enters the S102 battery cell pressing position through the magnetic drive. When the lithium battery at the pressing position stops and stabilizes, the fixing mechanism fixes the battery cell and moves the battery cell to the pre-pressing position. Then, the pressing servo axes in the three directions of X, Y, and Z are pressed synchronously into the slow pressing process. When the pressure modules in the three directions reach the preset pressure values ​​synchronously, the servo probe stop command is triggered, and the program records the movement displacement of the pressing components in each direction. The new lithium battery model is established through the program algorithm, and the change values ​​of the new lithium battery in the three directions of Δx, Δy, and Δz are obtained, and the clamping servo axes of subsequent stations such as S102 and S103-S107 are automatically compensated accordingly.

[0181] The embodiment of the present disclosure provides a battery top cover welding method, the battery top cover welding system includes: a programmable logic controller and a pressing device, the programmable logic controller is used to: when pressing the current battery cell, if it is determined that the size of the current battery cell is different from the size of the previous battery cell, control the pressing device to move the current battery cell to the pre-pressing position, control the pressing mechanism of the pressing device to move, so as to press the current battery cell at the pre-pressing position, when the pressure value on the current battery cell reaches a preset value so that the pressing mechanism stops moving, obtain the movement displacement of the pressing mechanism, calculate the change value between the movement displacement of the pressing mechanism and the preset movement displacement, and the change value is used to perform displacement compensation for the battery cell pressing and the process after the battery cell pressing in the top cover welding, and the process after the battery cell pressing includes Including: gap detection, battery cell pre-welding, battery cell full welding, battery cell rolling and post-rolling detection; that is, in the embodiment of the present disclosure, when the battery cell is pressed, the programmable logic controller pre-presses the current battery cell that is determined to be a different size from the previous battery cell, and then presses it until the pressure value on the current battery cell reaches a preset value so that the pressing mechanism stops moving, obtains the movement displacement of the pressing mechanism, and calculates the change value between the preset movement displacement, so as to perform displacement compensation for the battery cell pressing and post-cell pressing processes in the top cover welding. In this way, when producing battery cells of different sizes in the top cover welding, different battery cells can be clamped and positioned intelligently, avoiding the problem of manual time-consuming and labor-intensive work and the existence of errors, thereby improving the production efficiency of the battery cells in the top cover welding.

[0182] Based on the same inventive concept as the above embodiments, the present disclosure provides a battery top cover welding system, as shown in FIG2 , which may include: a programmable logic controller 21 and a press-fitting device 22 , wherein the programmable logic controller 21 is configured to:

[0183] When the current battery cell is press-fitted and the size of the current battery cell is different from that of the previous battery cell, the press-fitting device 22 is controlled to move the current battery cell to the pre-press-fitting position;

[0184] Controlling the movement of the pressing mechanism of the pressing device 22 to press-fit the current battery cell at the pre-pressing position;

[0185] When the pressure value on the current battery cell reaches a preset value and the pressing mechanism stops moving, the movement displacement of the pressing mechanism is obtained;

[0186] The change between the movement displacement of the pressing mechanism and the preset movement displacement is calculated; the change is used to compensate for the displacement of the cell pressing and the post-cell pressing process during the top cover welding; the post-cell pressing process includes: gap detection, cell pre-welding, cell full welding, cell rolling, and post-rolling detection.

[0187] In an optional embodiment, the programmable logic controller 21 is further configured to:

[0188] Obtain the batch number of the current battery cell; when the batch number of the current battery cell is different from the batch number of the previous battery cell, determine that the size of the current battery cell is different from the size of the previous battery cell.

[0189] In an optional embodiment, the programmable logic controller 21 is further configured to:

[0190] When the batch number of the current battery cell is the same as the batch number of the previous battery cell, it is determined that the size of the current battery cell is the same as the size of the previous battery cell.

[0191] In an optional embodiment, the battery top cover welding system further includes: a feeding device; a programmable logic controller 21, specifically configured to:

[0192] Get the QR code of the current battery cell from the loading device;

[0193] Determine the batch number of the current battery cell based on the QR code of the current battery cell.

[0194] In an optional embodiment, the press-fitting device 22 includes: a fixing mechanism; a programmable logic controller 21, specifically configured to:

[0195] When the current battery cell is press-fitted, if it is determined that the size of the current battery cell is different from the size of the previous battery cell, the fixing mechanism is controlled to fix the current battery cell and then move the current battery cell to the pre-press-fitting position.

[0196] In an optional embodiment, the pressing mechanism includes: an X-direction pressing assembly, a Y-direction pressing assembly and a Z-direction pressing assembly; the programmable logic controller control 21 is specifically used to: respectively control the movement of the X-direction pressing assembly, the Y-direction pressing assembly and the Z-direction pressing assembly of the pressing equipment 22, so that the X-direction pressing assembly, the Y-direction pressing assembly and the Z-direction pressing assembly press the current battery cell in the pre-pressing position.

[0197] In an optional embodiment, the programmable logic controller 21 is specifically configured to:

[0198] When the pressure value from the X-direction press-fitting assembly on the current battery cell reaches a preset first pressure value, causing the X-direction press-fitting assembly to stop moving, and the pressure value from the Y-direction press-fitting assembly on the current battery cell reaches a preset second pressure value, causing the Y-direction press-fitting assembly to stop moving, and the pressure value from the Z-direction press-fitting assembly on the current battery cell reaches a preset third pressure value, causing the Z-direction press-fitting assembly to stop moving, the movement displacement of the X-direction press-fitting assembly, the movement displacement of the Y-direction press-fitting assembly, and the movement displacement of the Z-direction press-fitting assembly are obtained.

[0199] In an optional embodiment, the press-fitting mechanism is further provided with a pressure module, wherein the pressure module is configured as follows:

[0200] Collect the pressure value applied by the pressing mechanism to the current battery cell;

[0201] When the pressure value reaches a preset value, a control signal is sent to the servo probe of the press-fitting device 22;

[0202] The servo probe of the press-fitting device 22 is used to control the press-fitting mechanism to stop moving according to the control signal.

[0203] In an optional embodiment, the preset movement displacement includes: an X-direction preset displacement, a Y-direction preset displacement, and a Z-direction preset displacement; the programmable logic controller 21 is specifically configured to:

[0204] Calculate the X-direction difference between the X-direction displacement of the press-fit component and the X-direction preset displacement;

[0205] Calculate the Y-direction difference between the Y-direction displacement of the press-fit component and the Y-direction preset displacement;

[0206] Calculate the Z-direction difference between the moving displacement of the Z-direction press-fit component and the Z-direction preset displacement;

[0207] The X-direction difference, the Y-direction difference, and the Z-direction difference are determined as the change value between the movement displacement of the press-fitting mechanism and the preset movement displacement.

[0208] The present disclosure also provides a battery pressing device in an embodiment. Referring to Figures 5, 6 and 7, the battery pressing device includes a bracket 6, a fixing mechanism 7 and a pressing mechanism 8. The fixing mechanism 7 and the pressing mechanism 8 are both arranged on the bracket 6. The fixing mechanism 7 is used to fix the current battery cell 5 and move the current battery cell 5 to a pre-pressing position. The pressing mechanism 8 presses the current battery cell 5 located at the pre-pressing position.

[0209] In the embodiment of the present disclosure, the fixing mechanism 7 includes a fixing part 71, which is used to fix the current battery cell 5. The fixing part 71 can be one or more fixing parts 71. When there are multiple fixing parts 71, the multiple fixing parts 71 can fix different positions of the current battery cell 5. Here, it should be supplemented that the embodiment of the present disclosure does not limit the number of fixing parts 71 and the specific position of the current battery cell 5 where the fixing parts 71 act.

[0210] In the embodiment of the present disclosure, when there are multiple fixing members 71, the fixing mechanism 7 also includes an adjusting member, which can adjust the distance between two relative fixing members 71 among the multiple fixing members 71, so that it can adapt to the fixation of current battery cells 5 of different sizes.

[0211] In the embodiment of the present disclosure, the fixing mechanism 7 is used to fix the current battery cell 5 and move the current battery cell 5 to the pre-pressing position. The fixing mechanism 7 includes a moving component. Specifically, the moving component is arranged on the bracket 6, and the fixing part 71 is arranged on the moving component. When the fixing part 71 fixes the current battery cell 5, the moving component moves the fixing part 71 and the current battery cell 5 fixed by the fixing part 71 to the pre-pressing position. Of course, the fixing part 71 can also be moved to the pre-pressing position first and then the current battery cell 5 is fixed. Here, the embodiment of the present disclosure does not limit it. In an implementable method provided by the embodiment of the present disclosure, the fixing part 71 first fixes the current battery cell 5, and then the moving component moves the fixing part 71 and the current battery cell 5 fixed by the fixing part 71 to the pre-pressing position. In this way, it is convenient for the fixing part 71 to fix the current battery cell 5.

[0212] In the embodiment of the present disclosure, the movable component may include a slide rail and a slider. The slide rail extends toward the pre-pressing position, and the slider is set on the fixing part 71. The slider can move relative to the slide rail to drive the fixing part 71 and the current battery cell 5 fixed by the fixing part 71 to reach the pre-pressing position. Here, it should be noted that the movable component can also be implemented in other ways, and the embodiment of the present disclosure does not limit this.

[0213] 5 , 6 , 8 and 9 , in the embodiment of the present disclosure, the pressing mechanism 8 can press-fit the current battery cell 5 located at the pre-pressing position. The pressing mechanism 8 includes an X-direction pressing assembly 81 , a Y-direction pressing assembly 82 and a Z-direction pressing assembly 83. The X-direction pressing assembly 81 is used to press-fit the current battery cell 5 located at the pre-pressing position in the X direction, the Y-direction pressing assembly 82 is used to press-fit the current battery cell 5 located at the pre-pressing position in the Y direction, and the Z-direction pressing assembly 83 is used to press-fit the current battery cell 5 located at the pre-pressing position in the Z direction. In this way, the current battery cell 5 located at the pre-pressing position can be pressed in three directions.

[0214] Among them, the Y direction of the current battery cell 5 is the direction in which the two large surfaces of the current battery cell 5 are relatively set, the X direction of the current battery cell 5 is the direction in which the two side walls of the current battery cell 5 without a top cover are relatively set, and the Z direction of the current battery cell 5 is the direction in which the side wall of the current battery cell 5 with a top cover is set toward the opposite side wall.

[0215] Specifically, in order to press-fit both large surfaces of the current battery cell 5, the press-fitting mechanism 8 includes two Y-direction press-fitting components 82, one Y-direction press-fitting component 82 being arranged on one side of one large surface of the current battery cell 5, and the other Y-direction press-fitting component 82 being arranged on the other side of the other large surface of the current battery cell 5. In this way, both large surfaces of the current battery cell 5 can be press-fitted. It should also be noted that the positions at which the two Y-direction press-fitting components 82 are respectively press-fitted on the two large surfaces of the current battery cell 5 can be exactly the same, partially the same, or completely different, and this is not limited in the embodiments of the present disclosure.

[0216] Taking one of the Y-direction pressing components 82 as an example, the Y-direction pressing component 82 includes a Y-direction pressing component 822 and a Y-direction driving component 821. The Y-direction driving component 821 is connected to the Y-direction pressing component 822, and the Y-direction driving component 821 provides the Y-direction pressing component 822 with power and pressure to move along the Y direction of the current battery cell 5.

[0217] In the embodiment of the present disclosure, the Y-direction driving component 821 provides the Y-direction pressing component 822 with power and pressure for moving along the Y direction of the current battery cell 5. Here, the Y-direction driving component 821 can be a driving motor, which directly provides the Y-direction pressing component 822 with power and pressure for moving along the Y direction of the current battery cell 5; here, the Y-direction driving component 821 can be a hydraulic pump, which directly provides the Y-direction pressing component 822 with power and pressure for moving along the Y direction of the current battery cell 5. It should be noted that the embodiment of the present disclosure does not limit the specific form of the Y-direction driving component 821.

[0218] In the embodiment of the present disclosure, the Y-direction driving member 821 provides the Y-direction pressing member 822 with power and pressure for moving along the Y direction of the current battery cell 5. In order to make the Y-direction pressing member 822 move more smoothly along the Y direction of the current battery cell 5, the Y-direction pressing assembly 82 also includes a Y-direction moving member 823. In an implementable method provided in the embodiment of the present disclosure, the Y-direction pressing member also includes a Y-direction guide rail, which extends along the Y direction toward the current battery cell 5. A Y-direction slider is provided on the Y-direction pressing member 822, and the Y-direction slider is connected to the Y-direction driving member 821 to drive the Y-direction slider to move along the Y direction of the current battery cell 5 relative to the Y-direction guide rail, thereby driving the Y-direction pressing member 822 to move along the Y direction of the current battery cell 5. Of course, the Y-direction pressing component also includes a Y-direction slider. A Y-direction guide rail is provided on the Y-direction pressing component 822. The Y-direction guide rail extends along the Y direction toward the current battery cell 5. The Y-direction slider is connected to the Y-direction driving component 821 to drive the Y-direction slider to move along the Y direction of the current battery cell 5 relative to the Y-direction guide rail, thereby driving the Y-direction pressing component 822 to move along the Y direction of the current battery cell 5. Here, it should be noted that the Y-direction moving component 823 can also be in other forms, and this is not limited to the embodiments of the present disclosure.

[0219] In the embodiment of the present disclosure, the Y-direction press-fitting part 822 can be completely fitted with the large surface of the current battery cell 5, or it can be partially fitted. The Y-direction press-fitting part 822 can be a regular structure such as a square, rectangle, triangle, etc., or it can be an irregular structure. Here, it should be supplemented that the embodiment of the present disclosure does not limit the specific structure of the Y-direction press-fitting part 822.

[0220] It can be seen from the above embodiments that the Y direction of the current battery cell 5 is the direction in which the two large surfaces of the current battery cell 5 are relatively set, the X direction of the current battery cell 5 is the direction in which the two side walls of the current battery cell 5 without a top cover are relatively set, and the Z direction of the current battery cell 5 is the direction in which the side wall of the current battery cell 5 with a top cover is set toward the opposite side wall.

[0221] Specifically, referring to Figures 5, 6, 8 and 9, in order to press-fit both side walls of the current battery cell 5 that are not provided with a top cover, the pressing mechanism 8 includes two X-direction pressing components 81, one X-direction pressing component 81 is arranged on one side of a side wall of the current battery cell 5 that is not provided with a top cover, and the other X-direction pressing component 81 is arranged on one side of another side wall of the current battery cell 5 that is not provided with a top cover, so that both side walls of the current battery cell 5 that are not provided with a top cover can be press-fitted. Here, it should also be noted that the positions where the two X-direction pressing components 81 are respectively pressed on the two opposite side walls of the current battery cell 5 that are not provided with a top cover can be exactly the same, partially the same, or completely different, and this is not limited in the embodiments of the present disclosure.

[0222] Taking one of the X-direction pressing components 81 as an example, the X-direction pressing component 81 includes a first X-direction pressing component 813, a second X-direction pressing component 814 and an X-direction driving component. The X-direction driving component is respectively connected to the first X-direction pressing component 813 and the second X-direction pressing component 814 to drive the first X-direction pressing component 813 and / or the second X-direction pressing component 814 to approach or move away from each other along the X-direction of the current battery cell 5, thereby providing pressure along the X-direction of the current battery cell 5.

[0223] Of course, X-direction pressing assembly 81 includes a first X-direction pressing member 813 and a second X-direction pressing member 814, a first X-direction driving member 811, and a second X-direction driving member 812. The first X-direction driving member 811 is connected to the first X-direction pressing member 813, and the second X-direction driving member 812 is connected to the second X-direction pressing member 814, so as to drive the first X-direction pressing member 813 and the second X-direction pressing member 814 toward or away from each other along the X-direction of the current battery cell 5, thereby providing pressure along the X-direction of the current battery cell 5. In one implementation provided in the embodiment of the present disclosure, the X-direction pressing assembly 81 is provided with two X-direction driving members.

[0224] In the embodiment of the present disclosure, the first X-direction drive 811 is connected to the first X-direction press 813, and the second X-direction drive 812 is connected to the second X-direction press 814, so as to drive the first X-direction press 813 and the second X-direction press 814 toward or away from each other along the X-direction of the current battery cell 5, thereby providing pressure along the X-direction of the current battery cell 5. The first X-direction drive 811 can be a drive motor, and the second X-direction drive 812 can be a drive motor; here, the first X-direction drive 811 can be a hydraulic pump, and the second X-direction drive 812 can be a hydraulic pump; it should be noted that the first X-direction drive 811 can be a drive motor, and the second X-direction drive 812 can be a hydraulic pump. It should be noted that the specific form of the first X-direction drive 811 and the second X-direction drive 812 is not limited in the embodiment of the present disclosure.

[0225] On this basis, the first X-direction pressing component 813 and the second X-direction pressing component 814 approach or move away from each other along the X-direction of the current battery cell 5, thereby providing pressure along the X-direction of the current battery cell 5, but at the same time, when the first X-direction pressing component 813 and the second X-direction pressing component 814 approach or move away from each other along the X-direction of the current battery cell 5, they cannot press-fit the two side walls where no top cover is provided. In other words, the first X-direction pressing component 813 and the second X-direction pressing component 814 need to move along the Y-direction of the current battery cell 5. In an implementable method provided in an embodiment of the present disclosure, the Y-direction driving component 821 can also be simultaneously connected to the first X-direction pressing component 813 and the second X-direction pressing component 814 to drive the first X-direction pressing component 813 and the second X-direction pressing component 814 to move along the Y-direction of the current battery cell 5, so as to accurately press-fit the two side walls where no top cover is provided on the current battery cell 5.

[0226] In the embodiment of the present disclosure, the X-direction pressing assembly 81 further includes an X-direction moving component 815. In one implementation provided by the embodiment of the present disclosure, the X-direction moving component 815 further includes an X-direction guide rail, which extends in the X direction toward the current battery cell 5. The first X-direction pressing component 813 is provided with a first X-direction slider, and the second X-direction pressing component 814 is provided with a second X-direction slider. The first X-direction slider is connected to the first X-direction driving component 811, and the second X-direction slider is connected to the second X-direction driving component 812. The first X-direction pressing component 813 and the second X-direction pressing component 814 move closer to or farther from each other along the X direction of the current battery cell 5, thereby providing pressure along the X direction of the current battery cell 5. It should be noted that the X-direction moving component 815 can also be in other forms, and the embodiment of the present disclosure does not limit this.

[0227] In the embodiment of the present disclosure, the first X-direction press-fitting part 813 and the second X-direction press-fitting part 814 can be completely fitted with the two opposite side walls of the current battery cell 5 where no top cover is provided, or can be partially fitted with them. The first X-direction press-fitting part 813 and the second X-direction press-fitting part 814 can be regular structures such as squares, rectangles, triangles, etc., or can be irregular structures. It should be noted here that the embodiment of the present disclosure does not limit the specific structures of the first X-direction press-fitting part 813 and the second X-direction press-fitting part 814.

[0228] It can be seen from the above embodiments that the Y direction of the current battery cell 5 is the direction in which the two large surfaces of the current battery cell 5 are relatively set, the X direction of the current battery cell 5 is the direction in which the two side walls of the current battery cell 5 without a top cover are relatively set, and the Z direction of the current battery cell 5 is the direction in which the side wall of the current battery cell 5 with a top cover is set toward the opposite side wall.

[0229] Specifically, referring to Figures 5, 6 and 7, in order to press-fit the side wall of the top cover of the current battery cell 5, the pressing mechanism 8 includes a Z-direction pressing assembly 83, the Z-direction pressing assembly 83 includes a Z-direction pressing part 832 and a Z-direction driving part 831, the Z-direction driving part 831 is connected to the Z-direction pressing part 832, and the Z-direction driving part 831 provides the Z-direction pressing part 832 with power and pressure to move along the Z direction of the current battery cell 5.

[0230] In the embodiment of the present disclosure, the Z-direction driving component 831 provides the Z-direction pressing component 832 with power and pressure for moving along the Z direction of the current battery cell 5. Here, the Z-direction driving component 831 can be a driving motor, which directly provides the Z-direction pressing component 832 with power and pressure for moving along the Z direction of the current battery cell 5; here, the Z-direction driving component 831 can be a hydraulic pump, which directly provides the Z-direction pressing component 832 with power and pressure for moving along the Z direction of the current battery cell 5. It should be noted that the embodiment of the present disclosure does not limit the specific form of the Z-direction driving component 831.

[0231] In the embodiment of the present disclosure, the Z-direction driving member 831 provides the Z-direction pressing member 832 with power and pressure for moving along the Z direction of the current battery cell 5. In order to make the Z-direction pressing member 832 move more smoothly along the Z direction of the current battery cell 5, the Z-direction pressing assembly 83 also includes a Z-direction moving member 833. In an implementable method provided in the embodiment of the present disclosure, the Z-direction pressing member also includes a Z-direction guide rail, which extends along the Z direction toward the current battery cell 5. A Z-direction slider is provided on the Z-direction pressing member 832, and the Z-direction slider is connected to the Z-direction driving member 831 to drive the Z-direction slider to move along the Z direction of the current battery cell 5 relative to the Z-direction guide rail, thereby driving the Z-direction pressing member 832 to move along the Z direction of the current battery cell 5. Of course, the Z-direction pressing component also includes a Z-direction slider. A Z-direction guide rail is provided on the Z-direction pressing component 832. The Z-direction guide rail extends along the Z direction toward the current battery cell 5. The Z-direction slider is connected to the Z-direction driving component 831 to drive the Z-direction slider to move along the Z direction of the current battery cell 5 relative to the Z-direction guide rail, thereby driving the Z-direction pressing component 832 to move along the Z direction of the current battery cell 5. Here, it should be noted that the Z-direction moving component 833 can also be in other forms, and this is not limited to the embodiments of the present disclosure.

[0232] In the disclosed embodiment, the Z-direction press-fitting member 832 can be completely or partially aligned with the sidewall of the top cover of the current battery cell 5. The Z-direction press-fitting member 832 can have a regular structure such as a square, rectangle, or triangle, or an irregular structure. It should be noted that the disclosed embodiment does not limit the specific structure of the Z-direction press-fitting member 832. In one implementation provided by the disclosed embodiment, the Z-direction press-fitting member 832 is provided with an avoidance groove to avoid components on the sidewall of the top cover of the current battery cell 5.

[0233] Among them, the computer-readable storage medium can be a magnetic random access memory (FRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory, a magnetic surface storage device, an optical disc, or a compact disc read-only memory (CD-ROM) and other memories.

[0234] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0235] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0236] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0237] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0238] The above description is merely a preferred embodiment of the present disclosure and is not intended to limit the scope of protection of the present disclosure.

Claims

1. A battery top cover welding system, comprising: Programmable logic controller and press-fitting equipment, the programmable logic controller being used for: When pressing a current battery cell, and the size of the current battery cell is different from that of the previous battery cell, controlling the pressing device to move the current battery cell to a pre-pressing position; Controlling the pressing mechanism of the pressing device to move so as to press-fit the current battery cell at the pre-pressing position; When the pressure value on the current battery cell reaches a preset value and causes the pressing mechanism to stop moving, obtaining the movement displacement of the pressing mechanism; Calculate the change value between the movement displacement of the pressing mechanism and the preset movement displacement; wherein the change value is used to perform displacement compensation for the battery cell pressing and post-cell pressing processes in the top cover welding, and the post-cell pressing processes include: gap detection, battery cell pre-welding, battery cell full welding, battery cell rolling and post-rolling detection.

2. The system of claim 1, wherein: The programmable logic controller is further used for: Obtaining the batch number of the current battery cell; When the batch number of the current battery cell is different from the batch number of the previous battery cell, it is determined that the size of the current battery cell is different from the size of the previous battery cell.

3. The system of claim 1 or 2, wherein: The programmable logic controller is further used for: When the batch number of the current battery cell is the same as the batch number of the previous battery cell, it is determined that the size of the current battery cell is the same as the size of the previous battery cell.

4. The system of claim 2 or 3, wherein: The battery top cover welding system further includes: a feeding device; and the programmable logic controller, specifically configured to: Obtaining the QR code of the current battery cell from the loading device; The batch number of the current battery cell is determined according to the QR code of the current battery cell.

5. The system according to any one of claims 1 to 4, wherein: The press-fitting equipment includes: a fixing mechanism; the programmable logic controller is specifically used to: When the current battery cell is press-fitted, if it is determined that the size of the current battery cell is different from that of the previous battery cell, the fixing mechanism is controlled to fix the current battery cell and then move the current battery cell to the pre-press-fitting position.

6. The system of claim 5, wherein: The press-fitting mechanism includes: an X-direction press-fitting assembly, a Y-direction press-fitting assembly, and a Z-direction press-fitting assembly; the programmable logic controller is specifically used to: The X-direction press-fitting assembly, the Y-direction press-fitting assembly, and the Z-direction press-fitting assembly are controlled to move respectively, so that the X-direction press-fitting assembly, the Y-direction press-fitting assembly, and the Z-direction press-fitting assembly press-fit the current battery cell at the pre-press-fitting position.

7. The system of claim 6, wherein: The X-direction press-fitting component includes: a first X-direction press-fitting component and a second X-direction press-fitting component. The programmable logic controller is specifically used to: The first X-direction press-fitting assembly, the second X-direction press-fitting assembly, the Y-direction press-fitting assembly and the Z-direction press-fitting assembly are controlled to move respectively so that the first X-direction press-fitting assembly, the second X-direction press-fitting assembly, the Y-direction press-fitting assembly and the Z-direction press-fitting assembly press-fit the current battery cell in the pre-pressing position.

8. The system of claim 6 or 7, wherein: The programmable logic controller is specifically used for: When the pressure value borne by the current battery cell from the X-direction press-fitting assembly reaches a preset first pressure value, causing the X-direction press-fitting assembly to stop moving, and the pressure value borne by the current battery cell from the Y-direction press-fitting assembly reaches a preset second pressure value, causing the Y-direction press-fitting assembly to stop moving, and the pressure value borne by the current battery cell from the Z-direction press-fitting assembly reaches a preset third pressure value, causing the Z-direction press-fitting assembly to stop moving, the movement displacement of the X-direction press-fitting assembly, the movement displacement of the Y-direction press-fitting assembly, and the movement displacement of the Z-direction press-fitting assembly are obtained.

9. The system according to any one of claims 1 to 8, wherein: The press-fitting mechanism is further provided with a pressure module, wherein the pressure module is configured as follows: collecting a pressure value applied by the pressing mechanism to the current battery cell; When the pressure value reaches the preset value, a control signal is sent to the servo probe of the press-fitting device; The servo probe of the press-fitting device is used to control the press-fitting mechanism to stop moving according to the control signal.

10. The system of claim 8, wherein: The preset displacement includes: an X-direction preset displacement, a Y-direction preset displacement, and a Z-direction preset displacement; the programmable logic controller is specifically used to: Calculating the X-direction difference between the movement displacement of the X-direction press-fitting component and the X-direction preset displacement; Calculating the Y-direction difference between the moving displacement of the Y-direction press-fitting component and the Y-direction preset displacement; Calculating the Z-direction difference between the moving displacement of the Z-direction press-fitting assembly and the Z-direction preset displacement; The X-direction difference, the Y-direction difference, and the Z-direction difference are determined as the change value between the movement displacement of the press-fitting mechanism and the preset movement displacement.

11. A battery top cover welding method, applied to a battery top cover welding system, the battery top cover welding system comprising: Programmable logic controller and press-fitting equipment, the method comprising: When the current battery cell is press-fitted and the size of the current battery cell is different from that of the previous battery cell, the programmable logic controller controls the press-fitting device to move the current battery cell to the pre-press-fitting position; The programmable logic controller controls the pressing mechanism of the pressing device to move so as to press-fit the current battery cell at the pre-pressing position; When the pressure value on the current battery cell reaches a preset value and causes the pressing mechanism to stop moving, the programmable logic controller obtains the movement displacement of the pressing mechanism; The programmable logic controller calculates a change in displacement between the pressing mechanism and a preset displacement; wherein the change is used to perform displacement compensation for the cell pressing and post-cell pressing processes during top cover welding; the post-cell pressing processes include: gap detection, cell pre-welding, cell full welding, cell rolling, and post-rolling detection.

12. The method of claim 11, wherein: The method further comprises: The programmable logic controller obtains the batch number of the current battery cell; When the batch number of the current battery cell is different from the batch number of the previous battery cell, the programmable logic controller determines that the size of the current battery cell is different from the size of the previous battery cell.

13. The method according to claim 11 or 12, wherein: The method further comprises: When the batch number of the current battery cell is the same as the batch number of the previous battery cell, the programmable logic controller determines that the size of the current battery cell is the same as the size of the previous battery cell.

14. The method according to claim 12 or 13, wherein: The battery top cover welding system further includes: a feeding device; the programmable logic controller obtains the batch number of the current battery cell, including: The programmable logic controller obtains the QR code of the current battery cell from the loading device; The programmable logic controller determines the batch number of the current battery cell according to the QR code of the current battery cell.

15. The method according to any one of claims 11 to 14, wherein: The press-fitting device includes: a fixing mechanism; when the current battery cell is press-fitted and the size of the current battery cell is different from the size of the previous battery cell, the programmable logic controller controls the press-fitting device to move the current battery cell to the pre-press-fitting position, including: When the current battery cell is press-fitted, if the programmable logic controller determines that the size of the current battery cell is different from that of the previous battery cell, the programmable logic controller controls the fixing mechanism to fix the current battery cell and then moves the current battery cell to the pre-press-fitting position.

16. The method of claim 15, wherein: The press-fitting mechanism includes: an X-direction press-fitting assembly, a Y-direction press-fitting assembly, and a Z-direction press-fitting assembly; the programmable logic controller controls the movement of the press-fitting mechanism of the press-fitting device to press-fit the current battery cell at the pre-press-fitting position, including: The programmable logic controller controls the movement of the X-direction press-fitting assembly, the Y-direction press-fitting assembly, and the Z-direction press-fitting assembly respectively, so that the X-direction press-fitting assembly, the Y-direction press-fitting assembly, and the Z-direction press-fitting assembly press-fit the current battery cell at the pre-pressing position.

17. The method of claim 16, wherein: The X-direction pressing part includes: a first X-direction pressing part and a second X-direction pressing part. The programmable logic controller controls the pressing mechanism of the pressing device to move to press the current battery cell at the pre-pressing position, including: The first X-direction press-fitting assembly, the second X-direction press-fitting assembly, the Y-direction press-fitting assembly and the Z-direction press-fitting assembly are controlled to move respectively so that the first X-direction press-fitting assembly, the second X-direction press-fitting assembly, the Y-direction press-fitting assembly and the Z-direction press-fitting assembly press-fit the current battery cell in the pre-pressing position.

18. The method according to claim 16 or 17, wherein When the pressure value on the current battery cell reaches a preset value and causes the pressing mechanism to stop moving, the programmable logic controller obtains the movement displacement of the pressing mechanism, including: When the pressure value from the X-direction press-fitting assembly on the current battery cell reaches a preset first pressure value so that the X-direction press-fitting assembly stops moving, and the pressure value from the Y-direction press-fitting assembly on the current battery cell reaches a preset second pressure value so that the Y-direction press-fitting assembly stops moving, and the pressure value from the Z-direction press-fitting assembly on the current battery cell reaches a preset third pressure value so that the Z-direction press-fitting assembly stops moving, the programmable logic The logic controller obtains the movement displacement of the X-direction press-fitting assembly, the movement displacement of the Y-direction press-fitting assembly, and the movement displacement of the Z-direction press-fitting assembly.

19. The method according to any one of claims 11 to 18, wherein: The press-fitting mechanism is further provided with a pressure module, and the method further comprises: The pressure module collects the pressure value applied by the press-fitting mechanism to the current battery cell; When the pressure value reaches the preset value, the pressure module sends a control signal to the servo probe of the press-fitting device; The servo probe of the press-fitting device controls the press-fitting mechanism to stop moving according to the control signal.

20. The method of claim 18, wherein: The preset displacement includes: an X-direction preset displacement, a Y-direction preset displacement, and a Z-direction preset displacement; the programmable logic controller calculates the change value between the displacement of the press-fitting mechanism and the preset displacement, including: The programmable logic controller calculates the X-direction difference between the movement displacement of the X-direction press-fitting component and the X-direction preset displacement; The programmable logic controller calculates the Y-direction difference between the moving displacement of the Y-direction press-fitting component and the Y-direction preset displacement; The programmable logic controller calculates the Z-direction difference between the moving displacement of the Z-direction press-fitting assembly and the Z-direction preset displacement; The programmable logic controller determines the X-direction difference, the Y-direction difference, and the Z-direction difference as the change value between the movement displacement of the press-fitting mechanism and the preset movement displacement.

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