A spot welding device for lithium battery cell processing and production

Abstract

The present application relates to lithium battery cell spot welding technical field, specifically disclose a kind of spot welding device for lithium battery cell processing production, comprising: workbench, the top of workbench is fixed with working stand, the surface of working stand is provided with moving frame, the surface of moving frame is provided with spot welding head, the top of workbench is provided with electric core piece, and the top of electric core piece is uniformly distributed with connecting piece;It further includes: placing assembly and weight monitoring piece, placing assembly is arranged on the surface of workbench, the quantity of electric core piece is judged by monitoring the weight of electric core piece, reach the purpose of monitoring the quantity of electric core piece, the advancing direction and position of spot welding head are detected in advance by pressure monitoring piece, it is convenient to monitor the direction of single row and double row battery pack spot welding, replace artificial observation direction and intelligent numerical control mode, more stable and simple, simultaneously, according to the thickness of connecting piece monitored by abutting and pressing seat, the spot welding pressure required by spot welding head to work is judged, it is beneficial to current penetration material to make welding part reach required melting temperature.

Description

Technical Field

[0001] This invention relates to the field of lithium battery cell spot welding technology, specifically to a spot welding device for lithium battery cell processing and production. Background Technology

[0002] A lithium battery cell spot welding machine is a specialized device for welding lithium battery cells. It mainly utilizes a high instantaneous current passing through the electrodes to generate high heat at the contact points between the cell's tabs and connecting pieces, thereby welding the two together. This welding method can effectively avoid damage to the internal structure of the cell while ensuring the reliability and conductivity of the connection. During the spot welding process, the spot welding machine is started, and the electrodes are pressed onto the tabs and cell electrodes according to the preset pressure and position. At the same time, current passes through the electrodes, tabs, and cell electrodes, generating resistance heat at the contact points. The metals melt and fuse together under the action of heat to form a weld point. During the welding process, it is necessary to ensure that the electrode pressure is stable to ensure the uniformity of the weld point quality. Generally, multiple weld points need to be welded at the connection between the tabs and cell electrodes to enhance the reliability of the connection.

[0003] During the welding process between the connecting piece and the electrode tab, it is necessary to adjust the forward direction of the spot welding head in a timely manner. If operated manually, the operation speed is slow. If identified by CNC, the path needs to be pre-adjusted, which is difficult for inexperienced operators and the path adjustment is cumbersome, increasing the difficulty of operation. Therefore, we propose a spot welding device for lithium battery cell processing and production. Summary of the Invention

[0004] The purpose of this invention is to provide a spot welding device for lithium battery cell processing and production, in order to solve the problems mentioned in the background art, which require timely adjustment of the forward direction of the spot welding head. If operated manually, the operation speed is slow. If identified by CNC, the path needs to be pre-adjusted, which is difficult for unskilled operators and the path adjustment is cumbersome, increasing the difficulty of operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a spot welding device for lithium battery cell processing and production, comprising: a worktable, a work frame fixed on the top of the worktable, a movable frame provided on the surface of the work frame, a spot welding head provided on the surface of the movable frame, a battery cell component provided on the top of the worktable, and connecting pieces evenly distributed on the top of the battery cell component.

[0006] It also includes: a placement component and a weight monitoring component. The placement component is set on the surface of the workbench, and the weight monitoring component is set inside the placement component. The weight of the battery cell is monitored by the placement component and the weight monitoring component. The number of battery cells is determined based on the weight of the battery cell. At the same time, the weight monitoring component adjusts the heating temperature of the spot welding head according to the number of battery cells.

[0007] Position monitoring components are installed on the surface of the work frame to monitor the forward position of the moving frame;

[0008] The rotating component is located on the outer wall of the spot welding head, and the pressure monitoring component is located on the surface of the connecting piece. The pressure monitoring component monitors the position and thickness of the connecting piece to achieve thickness monitoring. At the same time, the position monitoring of the connecting piece is used to determine the forward direction of the spot welding head.

[0009] The device includes an operating component and an adjusting component. The operating component is located within the rotating component, while the adjusting component is located on top of the pressure monitoring component. The operating component allows adjustment of the monitoring angle of the pressure monitoring component, facilitating the monitoring of the forward direction of the spot welding head. The adjusting component allows adjustment of the vertical movement of the pressure monitoring component, facilitating the monitoring of the position and thickness of the connecting piece.

[0010] The placement assembly includes a placement platform fixed to the surface of the workbench, and a limit plate is fixed to the inner wall of the placement platform. The lower end of the battery cell is inserted into the inside of the limit plate, and the bottom of the battery cell presses against the surface of the lifting plate. A spring is fixed to the bottom of the lifting plate, and the bottom of the spring is fixed to the inner wall of the placement platform.

[0011] The weight monitoring component includes a movable plate fixed to the bottom of the lifting plate, a pressure plate 1 fixed to one side of the movable plate surface, and the pressure plate 1 pressing against the surface of the gear switch plate 1. The gear switch plate 1 is fixed to the surface of the fixed plate 1, and the fixed plate 1 is fixed to the inner wall of the placement platform.

[0012] Among them, a second pressing plate is fixed on the other side of the surface of the movable plate, and the second pressing plate presses against the surface of the second gear switch plate. The second gear switch plate is fixed on the surface of the second fixed plate, and the second fixed plate is fixed on the inner wall of the placement platform.

[0013] The position monitoring component includes a connecting plate fixed to the surface of the work frame, and a push switch is fixed to the surface of the connecting plate. A pressing block is pressed against the surface of the push switch, and the pressing block is fixed to the surface of the moving frame.

[0014] The rotating component includes a fixed ring fixed to the surface of the spot welding head, and a rotating ring rotatably connected to the inner wall of the fixed ring. A gear ring is fixed to the bottom of the fixed ring, and a rotating gear meshes with the side of the gear ring. A support frame is fixed to the surface of the rotating ring, and the rotating gear is positioned above the support frame. The bottom of the rotating gear is connected to the motor through an operating component.

[0015] The outer wall of the fixed ring is fixed with a fixed frame, and the center of the rotating gear is fixed with a rotating rod, the top of which is slidably connected to the inside of the fixed frame.

[0016] The operating component includes a metal plate fixed to the bottom of the rotating gear, and an electromagnet is provided at the bottom of the metal plate. The electromagnet is fixed on the rotating rod, and the rotating rod is fixedly connected to the output shaft of the motor.

[0017] The pressure monitoring component includes a pressure seat located above the connecting piece, with a movable ring fixed to the top of the pressure seat. A rod is inserted inside the pressure seat, and a spring is fixed to the top of the movable ring. The spring is connected to the pressure sensor.

[0018] The adjustment assembly includes a threaded cylinder fixed to the surface of the pressure sensor, an output shaft at the bottom of the motor fixedly connected to a screw, a screw threaded to the inside of the threaded cylinder at the lower end of the screw, inserts fixed to both sides of the surface of the pressure sensor, and inserts rods inserted into the inside of the inserts, which are fixed to the surface of the motor. A protective sleeve is fitted over the outside of the pressure sensor, and the top of the protective sleeve is fixed to the motor.

[0019] This invention has at least the following beneficial effects:

[0020] The controller determines the quantity of battery cells by monitoring their weight, and then determines the required thickness range of the connecting pieces based on the number of cells. Pressure monitoring devices determine the actual thickness of the connecting pieces. If the actual thickness does not match the predicted thickness, the controller alerts the operator, ensuring a better match between the number of cells and the thickness of the connecting pieces. This reduces mismatches, facilitates current flow, and allows for adjustment of the welding head's heating temperature based on the connecting piece thickness, reducing manual temperature control. The pressure monitoring device also detects the welding head's direction and position in advance, facilitating the monitoring of welding direction for single-row and double-row battery packs, replacing manual observation. This intelligent CNC mode is more stable and simpler. Furthermore, the controller determines the required welding pressure based on the connecting piece thickness monitored by the pressure seat, ensuring current penetration through the material and reaching the required melting temperature at the welding point. Attached Figure Description

[0021] Figure 1 This is a first three-dimensional schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a second three-dimensional schematic diagram of the structure of the present invention;

[0023] Figure 3 This is a partial structural cross-sectional view of the component placement device of the present invention;

[0024] Figure 4 This is a partial structural schematic diagram of the weight monitoring component of the present invention;

[0025] Figure 5This is a partial structural schematic diagram of the spot welding head and position monitoring component of the present invention;

[0026] Figure 6 This is a partial structural schematic diagram of the position monitoring device of the present invention;

[0027] Figure 7 This is a partial structural schematic diagram of the moving frame and rotating assembly of the present invention;

[0028] Figure 8 This is a partial structural schematic diagram of the rotating component and pressure monitoring element of the present invention;

[0029] Figure 9 This is a partial structural schematic diagram of the pressure monitoring element and adjustment assembly of the present invention;

[0030] Figure 10 This is a partial structural diagram of the rotating component and the operating component of the present invention.

[0031] In the diagram: 11. Workbench; 12. Work frame; 13. Moving frame; 14. Battery cell component; 15. Connecting piece; 16. Spot welding head; 2. Placement assembly; 21. Placement platform; 22. Limiting plate; 23. Lifting plate; 24. Spring 1; 3. Weight monitoring component; 31. Moving plate; 32. Pressing plate 1; 33. Fixing plate 1; 34. Gear switch plate 1; 35. Pressing plate 2; 36. Fixing plate 2; 37. Gear switch plate 2; 4. Position monitoring component; 41. Connecting plate; 42. Push switch; 43. Pressing block 5. Rotating assembly; 51. Fixed ring; 52. Gear ring; 53. Rotating gear; 54. Support frame; 55. Fixed frame; 56. Motor; 57. Rotating ring; 58. Rotating rod one; 6. Operating assembly; 61. Metal plate; 62. Electromagnet; 63. Rotating rod two; 7. Pressure monitoring component; 71. Pressure sensor; 72. Insert rod one; 73. Spring two; 74. Moving ring; 75. Pressure seat; 8. Adjusting assembly; 81. Threaded cylinder; 82. Screw; 83. Insert cylinder; 84. Insert rod two; 85. Protective cylinder. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] Please see Figures 1 to 10The present invention provides a technical solution: a spot welding device for lithium battery cell processing and production, comprising: a workbench 11, a work frame 12 fixed on the top of the workbench 11, a movable frame 13 provided on the surface of the work frame 12, a spot welding head 16 provided on the surface of the movable frame 13, a battery cell component 14 provided on the top of the workbench 11, and connecting pieces 15 evenly distributed on the top of the battery cell component 14.

[0035] It also includes: placement component 2 and weight monitoring component 3. Placement component 2 is set on the surface of workbench 11, and weight monitoring component 3 is set inside placement component 2. The weight of battery cell 14 is monitored by placement component 2 and weight monitoring component 3. The number of battery cell 14 is determined based on the weight of battery cell 14. At the same time, weight monitoring component 3 adjusts the heating temperature of spot welding head 16 according to the number of battery cell 14.

[0036] Position monitoring component 4 is installed on the surface of the work frame 12 and the forward position of the moving frame 13 is monitored by the position monitoring component 4;

[0037] The rotating component 5 is located on the outer wall of the spot welding head 16, and the pressure monitoring component 7 is located on the surface of the connecting piece 15. The pressure monitoring component 7 monitors the position and thickness of the connecting piece 15 to achieve thickness monitoring of the connecting piece 15. At the same time, the position monitoring of the connecting piece 15 by the pressure monitoring component 7 determines the forward direction of the spot welding head 16. The controller predicts the thickness range of the connecting piece 15 based on the quantity signal of the battery cell 14. If the thickness of the placed connecting piece 15 does not meet the standard, a warning needs to be issued.

[0038] The operating component 6 is located in the rotating component 5, and the adjusting component 8 is located on top of the pressure monitoring component 7. The operating component 6 adjusts the monitoring angle of the pressure monitoring component 7 to facilitate the pressure monitoring component 7 in monitoring the forward direction of the spot welding head 16. The adjusting component 8 adjusts the vertical movement of the pressure monitoring component 7 to facilitate the pressure monitoring component 7 in monitoring the position and thickness of the connecting piece 15.

[0039] The placement assembly 2 includes a placement platform 21 fixed to the surface of the workbench 11, and a limit plate 22 is fixed to the inner wall of the placement platform 21. The lower end of the battery cell 14 is inserted into the inside of the limit plate 22, and the bottom of the battery cell 14 presses against the surface of the lifting plate 23. A spring 24 is fixed to the bottom of the lifting plate 23, and the bottom of the spring 24 is fixed to the inner wall of the placement platform 21, which facilitates monitoring the weight of the battery cell 14. The quantity of the battery cell 14 is determined based on the weight of the battery cell 14, thereby achieving the purpose of monitoring the quantity of the battery cell 14.

[0040] The weight monitoring component 3 includes a movable plate 31 fixed to the bottom of the lifting plate 23. A pressing plate 32 is fixed to one side of the surface of the movable plate 31, and the pressing plate 32 presses against the surface of the gear switch plate 34. The gear switch plate 34 is fixed to the surface of the fixed plate 33, and the fixed plate 33 is fixed to the inner wall of the placement platform 21. The downward position of the lifting plate 23 is monitored by the signal of the pressing plate 32 pressing against the gear switch plate 34, which facilitates the determination of the weight of the battery cell 14 and transmits the monitoring signal to the controller. The controller can determine the required thickness of the connecting piece 15 based on the number of battery cells 14, which facilitates the controller to monitor the thickness range of the connecting piece 15 and reduces the phenomenon of mismatch between the number of battery cells 14 and the thickness of the connecting piece 15.

[0041] A second pressure plate 35 is fixed on the other side of the surface of the movable plate 31, and the second pressure plate 35 presses against the surface of the second gear switch plate 37. The second gear switch plate 37 is fixed on the surface of the second fixed plate 36, and the second fixed plate 36 is fixed on the inner wall of the placement platform 21. The more battery cells 14 there are, the thicker the connecting piece 15 needs to be. The thicker the connecting piece 15 is, the higher the heating temperature is required. By pressing the second gear switch plate 37 with the second pressure plate 35, multiple heating temperatures can be switched, which makes it easy to adjust the heating temperature of the spot welding head 16 according to the thickness of the connecting piece 15.

[0042] The battery cells 14 are sequentially inserted into the limiting plate 22. The more battery cells 14 inserted, the greater the pressure exerted by the battery cells 14 on the lifting plate 23, and the greater the descent distance of the lifting plate 23. When the lifting plate 23 moves downward, it drives the moving plate 31 to move downward synchronously. At this time, the spring 1 24 is in a compressed and stored state. The downward movement of the moving plate 31 drives the pressing plate 1 32 and the pressing plate 2 35 to move downward synchronously. When the pressing plate 1 32 moves downward, the position of the pressing plate 1 32 against the surface of the gear switch plate 1 34 changes, realizing the weight monitoring of the battery cells 14. The number of battery cells 14 is determined based on the weight value of the battery cells 14. The more battery cells 14 there are, the greater the weight. The number of battery cells 14 is determined by the pressing position on the surface of the gear switch plate 34. After receiving the signal indicating the number of battery cells 14, the controller adjusts the monitoring range of the thickness of the connecting piece 15 to be spot-welded according to the signal. When the pressing plate 35 moves down, the position of the pressing plate 35 pressing against the surface of the gear switch plate 37 changes, controlling the heating temperature of the spot welding head 16. The surface of the gear switch plate 37 is divided into three gears from top to bottom: the first gear, the second gear, and the third gear. The first gear controls a slightly lower temperature, the second gear controls a medium temperature, and the third gear controls a slightly higher temperature. This makes it easier to adjust the heating temperature of the spot welding head 16 according to the thickness of the connecting piece 15, reducing manual temperature adjustment and making the system more intelligent.

[0043] The position monitoring component 4 includes a connecting plate 41 fixed to the surface of the work frame 12, and a push switch 42 is fixed to the surface of the connecting plate 41. A pressing block 43 is pressed against the surface of the push switch 42, and the pressing block 43 is fixed to the surface of the moving frame 13. The interval between the push switches 42 is the same as the interval between the holes on the surface of the limit plate 22. When the pressing block 43 moves one position with the moving frame 13, the pressing block 43 presses against the adjacent push switch 42, and the controller receives a signal that the moving frame 13 has moved one position.

[0044] The rotating assembly 5 includes a fixed ring 51 fixed to the surface of the spot welding head 16, and a rotating ring 57 rotatably connected to the inner wall of the fixed ring 51. A gear ring 52 is fixed to the bottom of the fixed ring 51, and a rotating gear 53 meshes with the side of the gear ring 52. A support frame 54 is fixed to the surface of the rotating ring 57, and the rotating gear 53 is positioned above the support frame 54. The bottom of the rotating gear 53 is connected to the motor 56 through the operating assembly 6. The operation of the motor 56 can indirectly drive the rotating gear 53 to rotate, which facilitates the angle adjustment of the pressure monitoring element 7, thereby facilitating the detection of the forward direction of the spot welding head 16 by the pressure monitoring element 7.

[0045] A fixing frame 55 is fixed to the outer wall of the fixing ring 51, and a rotating rod 58 is fixed to the center of the rotating gear 53. The top of the rotating rod 58 is slidably connected to the inside of the fixing frame 55. The fixing frame 55 limits the rotation of the rotating rod 58, making the rotation of the rotating rod 58 more stable.

[0046] The operating component 6 includes a metal plate 61 fixed to the bottom of the rotating gear 53, and an electromagnet 62 is provided at the bottom of the metal plate 61. The electromagnet 62 is fixed on the rotating rod 63, which is fixedly connected to the output shaft of the motor 56. The electromagnet 62 is wrapped inside the metal plate 61 to achieve the limiting alignment between the metal plate 61 and the electromagnet 62, and to prevent the electromagnet 62 from intersecting with the metal plate 61.

[0047] When the pressure monitoring element 7 fails to detect the next set of connecting pieces 15, the controller energizes the electromagnet 62. After energization, the electromagnet 62 becomes magnetic, attracting and fixing itself to the metal piece 61. The controller then controls the motor 56 to operate. The motor 56 rotates clockwise, causing the rotating rod 63 to rotate synchronously. The rotating rod 63 then drives the electromagnet 62 to rotate synchronously, which in turn drives the metal piece 61 to rotate synchronously. The metal piece 61 then drives the rotating gear 53 to rotate synchronously. As the rotating gear 53 rotates, the fixed ring 51 is fixedly connected to the gear ring 52. Under the action of the gear ring 52, the rotating gear 53 rotates around the gear ring 52. The rotating gear 53, through the metal piece 61, drives the support frame 54 to rotate synchronously, which in turn drives the rotating ring 57 to rotate synchronously. The rotating ring 57 rotates below the gear ring 52. When the rotating gear 53 rotates clockwise around the gear ring 52... After ten degrees, the motor 56 stops rotating forward. At this time, the pressure monitoring device 7 monitors whether the next set of connecting pieces 15 can be identified. If the pressure monitoring device 7 detects the next set of connecting pieces 15, the signal is transmitted to the controller. The controller controls the spot welding head 16 to change its forward direction. The moving frame 13 drives the spot welding head 16 forward one step. The position monitoring device 4 monitors the forward position of the moving frame 13. After the moving frame 13 moves forward one step, the pressure monitoring device 7 continues to work. If the next set of connecting pieces 15 is not detected, the electromagnet 62 is energized, driving the pressure monitoring device 7 to continue to rotate 90 degrees clockwise, realizing the advance monitoring of the position of the connecting pieces 15 and determining the forward direction of the spot welding head 16. If the pressure monitoring device 7 does not detect the next set of connecting pieces 15, it is determined that the spot welding work of the connecting pieces 15 has been completed, and the spot welding head 16 can stop moving forward, which facilitates the monitoring of the spot welding direction of single-row and double-row battery packs.

[0048] The pressure monitoring component 7 includes a pressure seat 75 disposed above the connecting piece 15, and a movable ring 74 fixed to the top of the pressure seat 75. A first insert rod 72 is inserted inside the pressure seat 75, and a second spring 73 is fixed to the top of the movable ring 74. The second spring 73 is connected to the pressure sensor 71. During operation, when the pressure seat 75 moves downward, it causes the pressure seat 75 to move downward synchronously, pressing against the surface of the connecting piece 15. When the pressure seat 75 moves upward, it causes the movable ring 74 to move upward synchronously. The outer wall of the insertion rod 72 moves, and the moving ring 74 squeezes the spring 73. The spring 73 is in a compressed and stored state. At the same time, the spring 73 presses against the pressure sensor 71. The pressure sensor 71 indirectly monitors the pressure of the pressing seat 75. The thickness of the connecting piece 15 is determined based on the squeezing force of the connecting piece 15 on the pressing seat 75. The thicker the connecting piece 15, the greater the squeezing force of the connecting piece 15 on the pressing seat 75. The pressure sensor 71 indirectly monitors this pressure, and the thickness of the connecting piece 15 can be determined based on the pressure monitoring.

[0049] When the pressure sensor 71 is initially working, the number of battery cells 14 is determined based on the weight monitored by the weight monitoring component 3. When there are many battery cells 14, the thickness of the spot-welded connecting piece 15 needs to be increased in order to allow a large current to pass through. After receiving the signal of the number of battery cells 14, the controller needs to make a basic judgment on the thickness of the connecting piece 15. When the pressure seat 75 indirectly detects that the thickness of the connecting piece 15 does not meet the spot-welding standard range, the controller controls the alarm to work, reminding the staff to replace it with a suitable thickness. When there are many battery cells 14, the impact of internal resistance on the performance of the battery pack will be amplified. A thicker connecting piece 15 can reduce the internal resistance of the battery to a certain extent. In addition, when there are many battery cells 14 in the battery pack, the mutual influence between each battery cell 14 will also increase. When facing abnormal situations such as overcharging, over-discharging, and short circuit, the internal buffering capacity of the battery cell 14 with a thicker connecting piece 15 is relatively stronger.

[0050] Simultaneously, based on the thickness of the connecting piece 15 monitored by the pressure seat 75, the required spot welding pressure of the spot welding head 16 is determined. The controller adjusts the spot welding pressure of the spot welding head 16 according to the thickness of the connecting piece 15. When the connecting piece 15 is thicker, the current needs to penetrate a thicker material to allow the welding part to reach the melting temperature. If the pressure is insufficient, the contact resistance between the connecting piece 15 and the electrode tab of the battery cell 14 will increase, resulting in uneven heat distribution in the welding area. The thicker connecting piece 15 has a relatively large heat capacity and will absorb more heat during the spot welding process. In order to accumulate enough heat in the welding area to melt the metal, a greater pressure needs to be applied to ensure good heat conduction. If the pressure is insufficient, the heat generated by welding will be quickly absorbed and dispersed by the thick electrode sheet, making it difficult for the metal at the welding point to reach the melting point, thus affecting the welding quality. Moreover, in order to maintain its shape stability and avoid deformation under pressure and current during the welding process, a thicker electrode sheet also requires greater pressure.

[0051] Example 2

[0052] The adjusting assembly 8 includes a threaded cylinder 81 fixed to the surface of the pressure sensor 71. The output shaft at the bottom of the motor 56 is fixedly connected to a screw 82. The lower end of the screw 82 is threaded into the inside of the threaded cylinder 81. Inserts 83 are fixed to both sides of the surface of the pressure sensor 71, and insert rods 84 are inserted into the inside of the inserts 83. Insert rods 84 are fixed to the surface of the motor 56. A protective sleeve 85 is fitted over the pressure sensor 71, and the top of the protective sleeve 85 is fixed to the motor 56. The protective sleeve 85 protects the pressure sensor 71 and limits its movement. When the motor 56 rotates forward, it drives the screw 82 to rotate forward. The rotation of the screw 82 causes the threaded cylinder 81 to move downward. The screw 81 moves the pressure sensor 71 downwards synchronously, and the pressure sensor 71 moves the insert 83 downwards. The insert rod 84 slides inside the insert 83. The vertical movement of the pressure sensor 71 is limited by the insert rod 84 and the insert 83, making the movement of the pressure sensor 71 more stable. The downward movement of the pressure sensor 71 moves the pressure seat 75 downwards synchronously. The downward movement of the pressure seat 75 is achieved by the forward rotation of the screw 82, which facilitates the pressure seat 75 to monitor the thickness of the connecting piece 15. When the rotating ring 57 reverses, it drives the screw 82 to reverse, causing the pressure seat 75 to move upwards, realizing the reset operation of the pressure sensor 71, which facilitates the position monitoring of the next set of battery cell components 14.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spot welding device for lithium battery cell processing and production, comprising: A workbench (11) is provided with a work frame (12) fixed on the top of the workbench (11), a movable frame (13) is provided on the surface of the work frame (12), a spot welding head (16) is provided on the surface of the movable frame (13), a battery cell (14) is provided on the top of the workbench (11), and connecting pieces (15) are evenly distributed on the top of the battery cell (14). Its characteristic is that it also includes: Placement component (2) and weight monitoring component (3) are provided. Placement component (2) is placed on the surface of workbench (11), and weight monitoring component (3) is placed inside placement component (2). The weight of battery cell (14) is monitored by placement component (2) and weight monitoring component (3). The number of battery cell (14) is determined based on the weight of battery cell (14). At the same time, weight monitoring component (3) adjusts the heating temperature of spot welding head (16) according to the number of battery cell (14). Position monitoring component (4) is disposed on the surface of the work frame (12) and the forward position of the moving frame (13) is monitored by the position monitoring component (4); The rotating component (5) and the pressure monitoring component (7) are provided. The rotating component (5) is disposed on the outer wall of the spot welding head (16), and the pressure monitoring component (7) is disposed on the surface of the connecting piece (15). The position and thickness of the connecting piece (15) are monitored by the pressure monitoring component (7) to realize the thickness monitoring of the connecting piece (15). At the same time, the forward direction of the spot welding head (16) is determined by monitoring the position of the connecting piece (15) by the pressure monitoring component (7). The operating component (6) and the adjusting component (8) are provided. The operating component (6) is located in the rotating component (5), and the adjusting component (8) is located on the top of the pressure monitoring component (7). The operating component (6) adjusts the monitoring angle of the pressure monitoring component (7) so that the pressure monitoring component (7) can monitor the forward direction of the spot welding head (16). The adjusting component (8) adjusts the vertical movement of the pressure monitoring component (7) so that the pressure monitoring component (7) can monitor the position and thickness of the connecting piece (15). The placement assembly (2) includes a placement platform (21) fixed to the surface of the workbench (11), and a limit plate (22) is fixed to the inner wall of the placement platform (21). The lower end of the battery cell (14) is inserted into the inside of the limit plate (22). The bottom of the battery cell (14) presses against the surface of the lifting plate (23). A spring (24) is fixed to the bottom of the lifting plate (23), and the bottom of the spring (24) is fixed to the inner wall of the placement platform (21). The weight monitoring component (3) includes a movable plate (31) fixed to the bottom of the lifting plate (23), a pressure plate (32) is fixed on one side of the surface of the movable plate (31), and the pressure plate (32) presses against the surface of the gear switch plate (34), the gear switch plate (34) is fixed on the surface of the fixed plate (33), and the fixed plate (33) is fixed to the inner wall of the placement platform (21); A second pressure plate (35) is fixed on the other side of the surface of the movable plate (31), and the second pressure plate (35) presses against the surface of the gear switch plate (37). The second gear switch plate (37) is fixed on the surface of the fixed plate (36), and the second fixed plate (36) is fixed on the inner wall of the placement platform (21).

2. The spot welding device for lithium battery cell processing and production according to claim 1, characterized in that: The position monitoring component (4) includes a connecting plate (41) fixed to the surface of the work frame (12), and a push switch (42) is fixed to the surface of the connecting plate (41). A pressing block (43) is pressed against the surface of the push switch (42), and the pressing block (43) is fixed to the surface of the moving frame (13).

3. The spot welding device for lithium battery cell processing and production according to claim 1, characterized in that: The rotating assembly (5) includes a fixed ring (51) fixed to the surface of the spot welding head (16), and a rotating ring (57) is rotatably connected to the inner wall of the fixed ring (51). A gear ring (52) is fixed to the bottom of the fixed ring (51), and a rotating gear (53) is meshed on the side of the gear ring (52). A support frame (54) is fixed to the surface of the rotating ring (57), and the rotating gear (53) is located above the support frame (54). The bottom of the rotating gear (53) is connected to the motor (56) through the operating assembly (6).

4. The spot welding device for lithium battery cell processing and production according to claim 3, characterized in that: The outer wall of the fixed ring (51) is fixed with a fixed frame (55), and the center of the rotating gear (53) is fixed with a rotating rod (58), and the top of the rotating rod (58) is slidably connected to the inside of the fixed frame (55).

5. The spot welding device for lithium battery cell processing and production according to claim 3, characterized in that: The operating component (6) includes a metal plate (61) fixed to the bottom of the rotating gear (53), and an electromagnet (62) is provided at the bottom of the metal plate (61). The electromagnet (62) is fixed on the rotating rod (63), and the rotating rod (63) is fixedly connected to the output shaft of the motor (56).

6. The spot welding device for lithium battery cell processing and production according to claim 3, characterized in that: The pressure monitoring device (7) includes a pressure seat (75) disposed above the connecting piece (15), and a movable ring (74) is fixed on the top of the pressure seat (75). A first insert rod (72) is inserted inside the pressure seat (75), and a second spring (73) is fixed on the top of the movable ring (74), and the second spring (73) is connected to the pressure sensor (71).

7. The spot welding device for lithium battery cell processing and production according to claim 6, characterized in that: The adjustment assembly (8) includes a threaded cylinder (81) fixed on the surface of the pressure sensor (71), the output shaft at the bottom of the motor (56) is fixedly connected to the screw (82), the lower end of the screw (82) is threadedly connected to the inside of the threaded cylinder (81), inserts (83) are fixed on both sides of the surface of the pressure sensor (71), and insert rods (84) are inserted inside the inserts (83), the insert rods (84) are fixed on the surface of the motor (56), and a protective cylinder (85) is sleeved on the outside of the pressure sensor (71), and the top of the protective cylinder (85) is fixed to the motor (56).

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