Spot welding device for lithium cell processing and production

Abstract

The invention relates to the technical field of lithium cell spot welding, and particularly discloses a spot welding device for lithium cell processing and production, which comprises a workbench, a working frame is fixed on the top of the workbench, a moving frame is arranged on the surface of the working frame, a spot welding head is arranged on the surface of the moving frame, and a cell part is arranged on the top of the workbench. Connecting sheets are uniformly distributed at the top of the battery core piece; the device further comprises a placing assembly and a weight monitoring part, the placing assembly is arranged on the surface of the workbench, the number of the battery cells is judged by monitoring the weight of the battery cells, the purpose of monitoring the number of the battery cells is achieved, the advancing direction and position of the spot welding head are detected in advance through the pressure monitoring part, and monitoring of the spot welding direction of single-row and double-row battery packs is facilitated; manual direction observation and an intelligent numerical control mode are replaced, stability and simplicity are achieved, meanwhile, the spot welding pressure needed by the spot welding head is judged according to the thickness, monitored by the abutting base, of the connecting piece, and current can penetrate through materials to enable the welding portion to reach the needed melting temperature.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery core spot welding, in particular to a spot welding device for lithium battery core processing and production. Background Art

[0002] Lithium battery spot welding machine is a kind of equipment specially used for lithium battery battery welding. It mainly uses instantaneous high current to pass through the electrode to generate high heat at the contact point between the battery tab and the connecting piece, so as to weld the two together. This welding method can effectively avoid damage to the internal structure of the battery cell, while ensuring the reliability and conductivity of the connection. During the spot welding process, the spot welding machine is started to press the electrode on the tab and the battery electrode according to the preset pressure and position. At the same time, the current passes through the electrode, the tab and the battery electrode to generate resistance heat at the contact point. The metal melts and fuses together under the action of heat to form a weld. During the welding process, it is necessary to ensure that the pressure of the electrode is stable to ensure the uniform quality of the weld. Generally, multiple welds are required at the connection between the tab and the battery electrode to enhance the reliability of the connection. During the welding process of the connecting piece and the pole ear, it is necessary to adjust the forward direction of the spot welding head in time. If it is operated manually, the operation speed is slow. If it is identified by CNC, the path needs to be debugged in advance. For unskilled workers, it is difficult and the debugging path is cumbersome, which increases the difficulty of operation. For this reason, we propose a spot welding device for lithium battery processing and production. Summary of the invention

[0003] The purpose of the present invention is to provide a spot welding device for lithium battery cell processing and production, so as to solve the problem that the forward direction of the spot welding head needs to be adjusted in time as proposed in the above background technology. If it is operated manually, the operation speed is slow. If it is identified by numerical control, the path needs to be debugged in advance, which is difficult for unskilled operators, and the debugging path is cumbersome, which increases the difficulty of operation.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spot welding device for processing and producing lithium battery cells, comprising: a workbench, a work frame is fixed on the top of the workbench, a mobile frame is arranged on the surface of the work frame, a spot welding head is arranged on the surface of the mobile frame, a battery cell is arranged on the top of the workbench, and connecting pieces are evenly distributed on the top of the battery cell; It also includes: a placement component and a weight monitoring component, the placement component is arranged on the surface of the workbench, the weight monitoring component is arranged inside the placement component, the weight of the electric core components is monitored by the placement component and the weight monitoring component, the number of the electric core components is determined according to the weight of the electric core components, and at the same time, the weight monitoring component adjusts the heating temperature of the spot welding head according to the number of the electric core components; A position monitoring component is arranged on the surface of the working frame, and the forward position of the moving frame is monitored by the position monitoring component; The rotating component and the pressure monitoring component are arranged on the outer wall of the spot welding head, and the pressure monitoring component is arranged on the surface of the connecting piece. The position and thickness of the connecting piece are monitored by the pressure monitoring component to realize the thickness monitoring of the connecting piece. At the same time, the forward direction of the spot welding head is determined by monitoring the position of the connecting piece by the pressure monitoring component. An operating component and an adjusting component, wherein the operating component is arranged in the rotating component, and the adjusting component is arranged on the top of the pressure monitoring component. The monitoring angle of the pressure monitoring component is adjusted by the operating component to facilitate the pressure monitoring component to monitor the forward direction of the spot welding head. The vertical movement of the pressure monitoring component is adjusted by the adjusting component to facilitate the pressure monitoring component to monitor the position and thickness of the connecting piece.

[0005] Among them, the placement component includes a placement table fixed on the surface of the workbench, and a limiting plate is fixed on the inner wall of the placement table, the lower end of the battery cell is inserted into the inside of the limiting plate, the bottom of the battery cell is pressed against the surface of the lifting plate, and a spring 1 is fixed at the bottom of the lifting plate, and the bottom of the spring 1 is fixed to the inner wall of the placement table.

[0006] Among them, the weight monitoring part includes a movable plate fixed at the bottom of the lifting plate, a pressure plate 1 is fixed on one side of the surface of the movable plate, and the pressure plate 1 presses against the surface of the gear switch plate 1, the gear switch plate 1 is fixed on the surface of the fixed plate 1, and the fixed plate 1 is fixed on the inner wall of the placing table.

[0007] Among them, a pressing plate 2 is fixed on the other side of the surface of the movable plate, and the pressing plate 2 presses on the surface of the gear switch plate 2, the gear switch plate 2 is fixed on the surface of the fixed plate 2, and the fixed plate 2 is fixed on the inner wall of the placement table.

[0008] The position monitoring component includes a connecting plate fixed on the surface of the working frame, a push switch is fixed on the surface of the connecting plate, a pressing block is pressed against the surface of the push switch, and the pressing block is fixed on the surface of the moving frame.

[0009] Among them, the rotating component includes a fixed ring fixed on the surface of the spot welding head, and the inner wall of the fixed ring is rotatably connected to the rotating ring, a gear ring is fixed to the bottom of the fixed ring, and a rotating gear is meshed on the side of the gear ring. A support frame is fixed on the surface of the rotating ring, and the rotating gear is arranged above the support frame. The bottom of the rotating gear is connected to the motor through the operating component.

[0010] A fixing frame is fixed to the outer wall of the fixing ring, a rotating rod 1 is fixed to the center of the rotating gear, and the top of the rotating rod 1 is slidably connected to the inside of the fixing frame.

[0011] The operating assembly includes a metal sheet fixed at the bottom of the rotating gear, and an electromagnet is arranged at the bottom of the metal sheet. The electromagnet is fixed on the second rotating rod, and the second rotating rod is fixedly connected to the output shaft of the motor.

[0012] Among them, the pressure monitoring component includes a pressure seat arranged above the connecting plate, and a movable ring is fixed on the top of the pressure seat, an insertion rod 1 is inserted inside the pressure seat, a spring 2 is fixed on the top of the movable ring, and the spring 2 is connected to the pressure sensor.

[0013] Among them, the adjustment component includes a threaded barrel fixed on the surface of the pressure sensor, the output shaft at the bottom of the motor is fixedly connected to the screw, the lower end of the screw is threadedly connected to the inside of the threaded barrel, insert barrels are fixed on both sides of the surface of the pressure sensor, and an insert rod 2 is inserted inside the insert barrel, and the insert rod 2 is fixed on the surface of the motor, and a protective barrel is provided on the outside of the pressure sensor, and the top of the protective barrel is fixed to the motor.

[0014] The present invention has at least the following beneficial effects: The weight of the battery cells is monitored to determine the number of battery cells, so as to achieve the purpose of monitoring the number of battery cells. The controller determines the required thickness range of the connecting piece according to the number of battery cells, and determines the actual thickness of the connecting piece through pressure monitoring of the pressure monitoring component. If the actual thickness of the connecting piece does not match the predicted thickness of the connecting piece, the staff is alerted, so that the number of battery cells and the thickness of the connecting piece are more matched, reducing the phenomenon of mismatch between the number of battery cells and the thickness of the connecting piece, which is beneficial to the flow of current. Moreover, it is convenient to adjust the heating temperature of the spot welding head according to the thickness of the connecting piece, reducing the operation of manual temperature adjustment, and being more intelligent. The forward direction and position of the spot welding head are detected in advance by the pressure monitoring component, which is convenient for monitoring the spot welding direction of single-row and double-row battery packs, replacing manual observation of direction and intelligent numerical control mode, which is more stable and simple. At the same time, the spot welding pressure required for the spot welding head to work is judged according to the thickness of the connecting piece monitored by the pressure seat, which is beneficial for the current to penetrate the material so that the welding part reaches the required melting temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a first stereoscopic schematic diagram of the structure of the present invention; Figure 2 It is a second stereoscopic schematic diagram of the structure of the present invention; Figure 3 It is a partial structural cross-sectional view of the components placed in the present invention; Figure 4 It is a partial structural schematic diagram of the weight monitoring component of the present invention; Figure 5 It is a partial structural schematic diagram of the spot welding head and the position monitoring component of the present invention; Figure 6 It is a partial structural schematic diagram of the position monitoring component of the present invention; Figure 7 It is a partial structural schematic diagram of the mobile frame and the rotating assembly of the present invention; Figure 8 It is a partial structural schematic diagram of the rotating assembly and the pressure monitoring component of the present invention; Fig. 9 It is a partial structural schematic diagram of the pressure monitoring component and the regulating assembly of the present invention; Fig.10 It is a partial structural schematic diagram of the rotating assembly and the operating assembly of the present invention.

[0016] In the figure: 11, workbench; 12, work rack; 13, mobile rack; 14, battery core; 15, connecting piece; 16, spot welding head; 2, placement component; 21, placement table; 22, limit plate; 23, lifting plate; 24, spring 1; 3, weight monitoring component; 31, mobile plate; 32, pressure plate 1; 33, fixed plate 1; 34, gear switch plate 1; 35, pressure plate 2; 36, fixed plate 2; 37, gear switch plate 2; 4, position monitoring component; 41, connecting plate; 42, press switch; 43, pressure 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 sheet; 62. Electromagnet; 63. Rotating rod two; 7. Pressure monitoring component; 71. Pressure sensor; 72. Insert rod one; 73. Spring two; 74. Moving ring; 75. Pressing seat; 8. Adjusting assembly; 81. Threaded barrel; 82. Screw; 83. Insert barrel; 84. Insert rod two; 85. Protective barrel. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1 See also Figures 1 to 10 The present invention provides a technical solution: a spot welding device for processing and producing lithium battery cells, comprising: a workbench 11, a work frame 12 is fixed on the top of the workbench 11, a mobile frame 13 is arranged on the surface of the work frame 12, a spot welding head 16 is arranged on the surface of the mobile frame 13, a battery cell 14 is arranged on the top of the workbench 11, and connecting pieces 15 are evenly distributed on the top of the battery cell 14; The device further comprises: a placement component 2 and a weight monitoring component 3, wherein the placement component 2 is arranged on the surface of the workbench 11, and the weight monitoring component 3 is arranged inside the placement component 2, and the weight of the electric core components 14 is monitored by the placement component 2 and the weight monitoring component 3, and the number of the electric core components 14 is determined according to the weight of the electric core components 14, and at the same time, the weight monitoring component 3 adjusts the heating temperature of the spot welding head 16 according to the number of the electric core components 14; A position monitoring member 4, which is disposed on the surface of the working frame 12, and monitors the forward position of the moving frame 13 through the position monitoring member 4; The rotating assembly 5 and the pressure monitoring component 7 are arranged on the outer wall of the spot welding head 16, and the pressure monitoring component 7 is arranged 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 controller predicts the thickness range of the connecting piece 15 according to the number signal of the battery core 14. If the thickness of the placed connecting piece 15 does not meet the standard, a warning is required; An operating component 6 and an adjusting component 8, wherein the operating component 6 is arranged in the rotating component 5, and the adjusting component 8 is arranged on the top of the pressure monitoring component 7. The monitoring angle of the pressure monitoring component 7 is adjusted by the operating component 6, so that the pressure monitoring component 7 can monitor the forward direction of the spot welding head 16. The vertical movement of the pressure monitoring component 7 is adjusted by the adjusting component 8, so that the pressure monitoring component 7 can monitor the position and thickness of the connecting piece 15.

[0019] The placement component 2 includes a placement table 21 fixed on the surface of the workbench 11, and a limit plate 22 is fixed on the inner wall of the placement table 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 is pressed 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 table 21, so as to monitor the weight of the battery cell 14 and judge the number of the battery cell 14 according to the weight of the battery cell 14, so as to achieve the purpose of monitoring the number of the battery cell 14.

[0020] 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 on 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 table 21, and 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, so as to facilitate the judgment of the weight of the battery cell 14, and transmit the monitoring signal to the controller, so that the controller can judge the required thickness of the connecting piece 15 according to the number of the battery cell 14, so as to facilitate the controller to monitor the thickness range of the connecting piece 15, and reduce the phenomenon that the number of the battery cell 14 and the thickness of the connecting piece 15 do not match.

[0021] A pressure plate 2 35 is fixed on the other side of the surface of the movable plate 31, and the pressure plate 2 35 presses on the surface of the gear switch plate 2 37, the gear switch plate 2 37 is fixed on the surface of the fixed plate 2 36, and the fixed plate 2 36 is fixed on the inner wall of the placement table 21. The more the number of battery cells 14 is, the thicker the thickness of the connecting piece 15 required is, the thicker the connecting piece 15 is, the higher the required heating temperature is. By pressing the pressure plate 2 35 against the gear switch plate 2 37, switching of multiple groups of heating temperatures is realized, which is convenient for adjusting the heating temperature of the spot welding head 16 according to the thickness of the connecting piece 15.

[0022] The battery cells 14 are put into the limiting plate 22 in sequence. The more battery cells 14 are put in, the greater the pressure of the battery cells 14 on the lifting plate 23, and the greater the descending distance of the lifting plate 23. When the lifting plate 23 moves down, it drives the movable plate 31 to move down synchronously. At this time, the spring 1 24 is in a compressed and force-accumulating state. The movable plate 31 moves downward and 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 where the pressing plate 1 32 presses on the surface of the gear switch plate 1 34 changes, so as to realize the weight monitoring of the battery cells 14. The number of battery cells 14 is judged according to the weight value of the battery cells 14. The more battery cells 14 are, the greater the weight is. According to the position of the pressing plate 1 32 at The number of battery cells 14 is determined by the pressing position on the surface of the gear switch plate 1 34. After receiving the number signal of the battery cells 14, the controller adjusts the monitoring range of the thickness of the connecting piece 15 to be spot welded according to the number signal of the battery cells 14. When the pressing plate 2 35 moves downward, the position at which the pressing plate 2 35 presses on the surface of the gear switch plate 2 37 changes, thereby controlling the heating temperature of the spot welding head 16. The surface of the gear switch plate 2 37 is sequentially distributed as the first gear, the second gear and the third gear from top to bottom. 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 facilitates adjusting the heating temperature of the spot welding head 16 according to the thickness of the connecting piece 15, reduces the operation of manual temperature adjustment, and is more intelligent.

[0023] The position monitoring component 4 includes a connecting plate 41 fixed on the surface of the working frame 12, and a push switch 42 is fixed on the surface of the connecting plate 41, and a pressing block 43 is pressed on the surface of the press switch 42, and the pressing block 43 is fixed on the surface of the moving frame 13. The interval position of the press switch 42 is the same as the interval of the socket on the surface of the limit plate 22. When the pressing block 43 moves one grid following the moving frame 13, the pressing block 43 presses the adjacent press switch 42, and the controller receives a signal that the moving frame 13 has moved a group of positions.

[0024] The rotating assembly 5 includes a fixed ring 51 fixed on the surface of the spot welding head 16, and the inner wall of the fixed ring 51 is rotatably connected to a rotating ring 57, 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, and a support frame 54 is fixed to the surface of the rotating ring 57. The rotating gear 53 is arranged above the support frame 54, and 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 is convenient for the angle adjustment of the pressure monitoring component 7, thereby facilitating the pressure monitoring component 7 to detect the forward direction of the spot welding head 16.

[0025] A fixing frame 55 is fixed to the outer wall of the fixing ring 51, a rotating rod 58 is fixed to the center of the rotating gear 53, and the top of the rotating rod 58 is slidably connected to the inside of the fixing frame 55. The rotating rod 58 is slidably connected to the inside of the fixing frame 55, and the rotating rod 58 is limited by the fixing frame 55, so that the rotation of the rotating rod 58 is more stable.

[0026] The operating component 6 includes a metal sheet 61 fixed at the bottom of the rotating gear 53, and an electromagnet 62 is arranged at the bottom of the metal sheet 61, the electromagnet 62 is fixed on the rotating rod 63, the rotating rod 63 is fixedly connected to the output shaft of the motor 56, and the electromagnet 62 is wrapped inside the metal sheet 61 to achieve limited alignment between the metal sheet 61 and the electromagnet 62, thereby avoiding interlacing between the electromagnet 62 and the metal sheet 61.

[0027] When the pressure monitoring component 7 cannot monitor the next set of connecting plates 15, the controller controls the electromagnet 62 to be energized. After the electromagnet 62 is energized, the electromagnet 62 generates magnetism, and the electromagnet 62 and the metal sheet 61 are adsorbed and fixed to each other. The controller controls the motor 56 to work. The motor 56 rotates forward to drive the rotating rod 2 63 to rotate synchronously. The rotating rod 2 63 drives the electromagnet 62 to rotate synchronously. The electromagnet 62 drives the metal sheet 61 to rotate synchronously. The metal sheet 61 drives the rotating gear 53 to rotate synchronously. The rotating gear 53 rotates, and 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 drives the support frame 54 to rotate synchronously through the metal sheet 61. The support frame 54 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 for nine seconds, the rotating gear 53 rotates clockwise around the gear ring 52 for nine seconds. After ten degrees, the motor 56 stops rotating forward. At this time, the pressure monitoring component 7 monitors whether the next group of connecting pieces 15 can be identified. If the pressure monitoring component 7 detects the next group of connecting pieces 15, the signal is transmitted to the controller, and the controller controls the spot welding head 16 to change the forward direction, and the movable frame 13 drives the spot welding head 16 to move forward one grid, and the forward position of the movable frame 13 is monitored by the position monitoring component 4. When the movable frame 13 moves forward one grid, the pressure monitoring component 7 continues to work. If the next group of connecting pieces 15 is not detected, the electromagnet 62 is energized to drive the pressure monitoring component 7 to continue to rotate clockwise by ninety degrees, so as to realize the advance monitoring of the position of the connecting piece 15 and judge the forward direction of the spot welding head 16. If the pressure monitoring component 7 does not detect the next group of connecting pieces 15, it is judged that the spot welding work of the connecting piece 15 has been completed, and the spot welding head 16 can stop moving forward, which is convenient for monitoring the spot welding direction of single-row and double-row battery packs.

[0028] The pressure monitoring member 7 includes a pressure seat 75 arranged above the connecting piece 15, and a moving ring 74 is fixed on the top of the pressure seat 75, a plug rod 1 72 is inserted inside the pressure seat 75, a spring 2 73 is fixed on the top of the moving ring 74, and the spring 2 73 is connected to the pressure sensor 71. During the operation of the pressure seat 75, the pressure sensor 71 moves downward to drive the pressure seat 75 to move downward synchronously, and the pressure seat 75 presses on the surface of the connecting piece 15, and the pressure seat 75 moves upward to drive the moving ring 74 to move upward synchronously. The outer wall of the insertion rod 1 72 moves, and the moving ring 74 squeezes the spring 2 73. The spring 2 73 is in a compressed and force-storing state. At the same time, the spring 2 73 presses 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 according to the squeezing force of the connecting piece 15 on the pressing seat 75. The thicker the connecting piece 15 is, the greater the squeezing force of the connecting piece 15 on the pressing seat 75 is. The pressure sensor 71 indirectly monitors the pressure, and the thickness of the connecting piece 15 can be determined according to the pressure monitoring. When the pressure sensor 71 is initially working, the number of the battery cells 14 is determined based on the weight monitored by the weight monitoring component 3. When the number of battery cells 14 is large, in order to allow a large current to pass through, the thickness of the connecting piece 15 to be spot-welded also needs to be increased. After the controller receives the number signal of the battery cells 14, it needs to make a basic judgment on the thickness of the connecting piece 15. When the pressure seat 75 indirectly monitors that the thickness of the connecting piece 15 does not reach the spot welding standard range, the controller controls the alarm to work to remind the staff to replace the appropriate thickness. When the number of battery cells 14 is large, the impact of the internal resistance on the performance of the battery pack will be amplified. The thicker connecting piece 15 can reduce the internal resistance of the battery to a certain extent. Moreover, when the number of battery cells 14 in the battery pack is large, the mutual influence between the battery cells 14 will also increase. When the battery cells 14 with thicker connecting pieces 15 face abnormal conditions such as overcharging, over-discharging, short circuit, etc., their internal buffering capacity is relatively strong. At the same time, the spot welding pressure required for the spot welding head 16 to work is determined based on the thickness of the connecting piece 15 monitored by the pressure seat 75, and 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 thicker materials to make the welding part reach the melting temperature. If the pressure is insufficient, the contact resistance between the connecting piece 15 and the pole ear of the battery cell 14 will increase, resulting in uneven heat distribution in the welding area. The thicker connecting piece 15 itself has a relatively large heat capacity and will absorb more heat during the spot welding process. In order to enable the welding area to accumulate enough heat to melt the metal, greater pressure needs to be applied to ensure good heat conduction. If the pressure is insufficient, the heat generated by the 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, thereby affecting the welding quality. Moreover, during the welding process, in order to maintain the stability of the shape of the thicker electrode sheet and avoid deformation under the action of pressure and current, greater pressure is also required.

[0029] Embodiment 2 The adjusting assembly 8 includes a threaded barrel 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 barrel 81, and the two sides of the surface of the pressure sensor 71 are fixed with plug-in barrels 83, and the inside of the plug-in barrel 83 is inserted with a second plug-in rod 84, and the second plug-in rod 84 is fixed to the surface of the motor 56. The outer sleeve of the pressure sensor 71 is provided with a protective barrel 85, and the top of the protective barrel 85 is fixed to the motor 56. The pressure sensor 71 is shielded and protected by the protective barrel 85, and the pressure sensor 71 is limited. When the motor 56 rotates forward, it drives the screw 82 to rotate forward, and the screw 82 rotates forward, so that the threaded barrel 81 is lowered. The threaded tube 81 drives the pressure sensor 71 to move downward synchronously, the pressure sensor 71 drives the insert tube 83 to move downward, the second insert rod 84 slides inside the insert tube 83, and the vertical movement of the pressure sensor 71 is limited by the second insert rod 84 and the insert tube 83, so that the movement of the pressure sensor 71 is more stable, and the downward movement of the pressure sensor 71 drives the pressure seat 75 to move downward synchronously, and the downward movement operation of the pressure seat 75 is realized through the forward rotation operation of the screw rod 82, so that the pressure seat 75 can monitor the thickness of the connecting piece 15. When the rotating ring 57 is reversed, it drives the screw rod 82 to reverse, so that the pressure seat 75 moves up, realizing the reset operation of the pressure sensor 71, which is convenient for the position monitoring of the next group of battery core components 14.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spot welding device for processing and producing lithium battery cells, comprising: A workbench (11), a work frame (12) being fixed on the top of the workbench (11), a movable frame (13) being arranged on the surface of the work frame (12), a spot welding head (16) being arranged on the surface of the movable frame (13), an electric core (14) being arranged on the top of the workbench (11), and connecting pieces (15) being evenly distributed on the top of the electric core (14); It is characterized by: also including: A placement component (2) and a weight monitoring component (3), wherein the placement component (2) is arranged on the surface of a workbench (11), and the weight monitoring component (3) is arranged inside the placement component (2). The weight of the electric core components (14) is monitored by the placement component (2) and the weight monitoring component (3), and the number of the electric core components (14) is determined based on the weight of the electric core components (14). At the same time, the weight monitoring component (3) adjusts the heating temperature of the spot welding head (16) based on the number of the electric core components (14); A position monitoring component (4), wherein the position monitoring component (4) is arranged on the surface of the working frame (12), and the forward position of the moving frame (13) is monitored by the position monitoring component (4); A rotating assembly (5) and a pressure monitoring component (7), wherein the rotating assembly (5) is arranged on the outer wall of the spot welding head (16), and the pressure monitoring component (7) is arranged 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 achieve 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); An operating component (6) and an adjusting component (8), wherein the operating component (6) is arranged in the rotating component (5), and the adjusting component (8) is arranged on the top of the pressure monitoring component (7). The monitoring angle of the pressure monitoring component (7) is adjusted by the operating component (6), so that the pressure monitoring component (7) can monitor the forward direction of the spot welding head (16). The vertical movement of the pressure monitoring component (7) is adjusted by the adjusting component (8), so that the pressure monitoring component (7) can monitor the position and thickness of the connecting piece (15).

2. The spot welding device for lithium battery processing and production according to claim 1 is characterized in that: The placement assembly (2) comprises a placement table (21) fixed on the surface of a workbench (11), and a limit plate (22) is fixed on the inner wall of the placement table (21), the lower end of the battery core (14) is inserted into the interior of the limit plate (22), the bottom of the battery core (14) is pressed against the surface of a lifting plate (23), a spring (24) is fixed on the bottom of the lifting plate (23), and the bottom of the spring (24) is fixed to the inner wall of the placement table (21).

3. The spot welding device for lithium battery processing and production according to claim 2 is characterized in that: The weight monitoring component (3) comprises a movable plate (31) fixed to the bottom of the lifting plate (23), a pressing plate (32) being fixed to one side of the surface of the movable plate (31), and the pressing plate (32) is pressed against the surface of a gear switch plate (34), the gear switch plate (34) is fixed to the surface of a fixed plate (33), and the fixed plate (33) is fixed to the inner wall of the placement table (21).

4. The spot welding device for lithium battery processing and production according to claim 3 is characterized in that: A second pressing plate (35) is fixed on the other side of the surface of the movable plate (31), and the second pressing 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 table (21).

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

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

7. The spot welding device for processing and producing lithium battery cells according to claim 6, characterized in that: A fixing frame (55) is fixed to the outer wall of the fixing ring (51), a rotating rod (58) is fixed to the center of the rotating gear (53), and the top of the rotating rod (58) is slidably connected to the inside of the fixing frame (55).

8. The spot welding device for lithium battery processing and production according to claim 6, characterized in that: The operating assembly (6) comprises a metal sheet (61) fixed to the bottom of the rotating gear (53), and an electromagnet (62) is provided at the bottom of the metal sheet (61), the electromagnet (62) is fixed to a second rotating rod (63), and the second rotating rod (63) is fixedly connected to the output shaft of the motor (56).

9. The spot welding device for lithium battery processing and production according to claim 8, characterized in that: The pressure monitoring component (7) comprises a pressure seat (75) arranged above the connecting piece (15), and a movable ring (74) is fixed on the top of the pressure seat (75), a first insertion rod (72) is inserted into the interior of the pressure seat (75), 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).

10. The spot welding device for lithium battery processing and production according to claim 9, characterized in that: The adjustment assembly (8) comprises a threaded barrel (81) fixed on the surface of the pressure sensor (71); the output shaft at the bottom of the motor (56) is fixedly connected to a screw rod (82); the lower end of the screw rod (82) is threadedly connected to the inside of the threaded barrel (81); an insertion barrel (83) is fixed on both sides of the surface of the pressure sensor (71); a second insertion rod (84) is inserted into the inside of the insertion barrel (83); the second insertion rod (84) is fixed to the surface of the motor (56); a protective barrel (85) is sleeved on the outside of the pressure sensor (71); and the top of the protective barrel (85) is fixed to the motor (56).

Images