Ultrasonic welding equipment for battery tabs
By designing a battery ear ultrasonic welding equipment, the protective cover is used to press the ear and the adapter piece together, the problem of poor welding of the ear and the adapter piece is solved, and the welding quality and the passing rate of the battery product are improved.
Patent Information
- Application Number
- CN202422197036.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-09
AI Technical Summary
During the welding process of the electrode ear and the adapter, the electrode ear ear and the adapter cannot fit effectively, resulting in poor welding and reducing the pass rate of the battery product.
Design a battery pole ear ultrasonic welding equipment. By setting up welding seats, welding shafts, lifting components, welding heads, fixed brackets, movable brackets, limit rods, protective covers and welding grooves, the protective covers are used to press the electrodes and adapters to ensure effective bonding and improve welding quality.
Through the pressure cooperation of the protective cover, the electrode ear and the adapter sheet maintain a good fit during the welding process, which significantly improves the welding quality and the pass rate of the battery product.
Smart Images
Figure CN223012134U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery production, in particular to an ultrasonic welding device for battery tabs. Background Art
[0002] At present, ultrasonic welding technology is used to weld the tab and the adapter plate. Ultrasonic welding technology refers to the use of high-frequency vibration waves transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces of the two objects rub against each other to form a fusion effect between the molecular layers.
[0003] In the related art, a Chinese patent with the authorization announcement number CN107671414A provides a multi-layer laminated battery cell ultrasonic welding device, which includes a battery cell support platform. An ultrasonic welding seat and an ultrasonic welding head are installed on one side of the battery cell support platform, and the ultrasonic welding head is located above the ultrasonic welding seat. The multi-layer laminated battery cell is placed on the battery cell support platform. There are a negative copper tab and a positive aluminum tab on one side of the multi-layer laminated battery cell. The negative copper tab and the positive aluminum tab are located below the ultrasonic welding head. A negative adapter plate and a positive adapter plate are placed on the ultrasonic welding seat. The top of the negative adapter plate contacts the bottom of the negative copper tab, and the negative adapter plate and the negative copper tab are welded together by the ultrasonic welding head and the ultrasonic welding seat. The top of the positive adapter plate contacts the bottom of the positive aluminum tab, and the positive adapter plate and the positive aluminum tab are welded together by the ultrasonic welding head and the ultrasonic welding seat.
[0004] In the process of implementing the present application, the inventor found that there are at least the following problems in this technology: during the welding process of the tab and the adapter plate, the tab and the adapter plate may not be effectively attached, resulting in poor welding of the tab and the adapter plate and reducing the product qualification rate of the battery. Summary of the Utility Model
[0005] In order to improve the welding quality of the tab and the adapter plate, the present application provides an ultrasonic welding device for battery tabs.
[0006] The ultrasonic welding device for battery tabs provided by the present application adopts the following technical solution:
[0007] An ultrasonic welding device for battery tabs includes a welding seat, a welding shaft is arranged on the welding seat, a lifting component is arranged between the welding shaft and the welding seat, and the lifting component is used to drive the welding shaft to move along the height direction of the welding seat. A welding head is fixedly arranged at one end of the welding shaft away from the welding seat. A fixed bracket is arranged on the welding seat, a movable bracket is slidably arranged on the fixed bracket, a limiting rod is arranged between the movable bracket and the welding shaft, the top end of the limiting rod is fixedly connected to the movable bracket, and the bottom end of the limiting rod is used to abut against the welding shaft. A protective cover is fixedly arranged at the bottom of the movable bracket, the protective cover is located below the welding shaft, and a welding groove is penetrated through the protective cover for the welding head to be inserted.
[0008] By adopting the above technical solution, when welding the tab and the adapter plate together, the stacked tab and adapter plate are placed under the protective cover, and then the lifting assembly drives the welding shaft to descend. The welding shaft drives the welding head to approach the tab and the adapter plate. During the descent of the welding shaft, the movable bracket carried on the welding shaft by the limiting rod descends along the fixed bracket, and the movable bracket drives the protective cover to descend. When the protective cover descends onto the tab, the lifting assembly continues to drive the welding shaft to descend, causing the welding shaft to separate from the limiting rod. At this time, the protective cover presses against the tab to apply a downward force on the tab, causing the tab to be pressed onto the adapter plate. When the welding head passes through the welding groove and contacts the tab, the lifting assembly stops, and then the welding head operates to weld the tab and the adapter plate together. After the tab and the adapter plate are welded together, the lifting assembly drives the welding shaft to rise, and the welding shaft drives the welding head to separate from the tab. When the welding shaft rises to abut against the bottom end of the limiting rod, the welding shaft continues to rise to drive the limiting rod and the movable bracket to move upward, and the upward movement of the movable bracket drives the protective cover to separate from the tab. During the welding process of the tab and the adapter plate, the tab and the adapter plate are pressed together by the protective cover, improving the welding quality of the tab and the adapter plate.
[0009] Preferably, a guide seat is fixedly arranged on the fixed bracket, a guide groove is formed in the guide seat, a guide block is slidably arranged in the guide groove, the guide block is fixedly connected to the movable bracket, a clamping groove is formed in the guide groove, a clamping block is slidably arranged in the clamping groove, and the clamping block is fixedly connected to the guide block.
[0010] By adopting the above technical solution, the movable bracket is slidably mounted on the guide seat through the guide block and the clamping block, enabling the movable bracket to move up and down along the direction in which the guide groove is formed.
[0011] Preferably, the lifting assembly includes a lifting motor, a lifting screw rod, and a lifting seat. A lifting groove is formed on one side of the welding seat facing the fixed bracket. The lifting motor is fixedly arranged in the lifting groove. One end of the lifting screw rod is fixedly connected to the output shaft of the lifting motor, and the other end of the lifting screw rod is rotatably connected to the inner wall of the lifting groove. The lifting seat is threadedly connected to the lifting screw rod, the lifting seat is slidably arranged in the lifting groove, and the lifting seat is fixedly connected to the end of the welding shaft away from the welding head.
[0012] By adopting the above technical solution, when the lifting motor starts, it drives the lifting screw rod to rotate. The rotation of the lifting screw rod drives the lifting seat to move along the lifting groove, and the movement of the lifting seat drives the welding shaft to move in the height direction, causing the welding shaft to drive the welding head to lift.
[0013] Preferably, a hoisting roller is arranged above the movable support, a hoisting rope is wound around the hoisting roller, one end of the hoisting rope is fixedly connected to the hoisting roller, a counterweight is arranged at the other end of the hoisting rope, the bottom of the counterweight is used to abut against the top of the movable support, a hoisting motor is fixedly arranged on the fixed support, a hoisting shaft is fixedly arranged on the output shaft of the hoisting motor, and the hoisting shaft is fixedly connected to the hoisting roller.
[0014] By adopting the above technical solution, when the welding shaft descends and separates from the limit rod, the output shaft of the hoisting motor rotates forward to drive the hoisting shaft and the hoisting roller to rotate synchronously, so that the hoisting roller pays out the wire, and then the counterweight descends and abuts against the movable support, increasing the weight of the movable support and increasing the pressure exerted by the protective cover on the tab. When the welding shaft ascends and abuts against the limit rod, the output shaft of the hoisting motor rotates reversely to drive the hoisting shaft to rotate reversely. The output shaft of the hoisting motor rotates reversely to drive the hoisting shaft and the hoisting roller to rotate synchronously, so that the hoisting roller takes in the wire, and then the counterweight ascends and separates from the movable support. By setting the hoisting motor to lift the counterweight, the load for the lifting seat to drive the movable support to ascend is reduced, and the situation of fracture between the movable support and the lifting seat is reduced.
[0015] Preferably, a set of wire retaining rings is sleeved on the hoisting roller, the wire retaining rings are rotatably connected to the hoisting roller, and the hoisting rope is located between the wire retaining rings.
[0016] By adopting the above technical solution, the hoisting rope is restricted between the wire retaining rings, reducing the situation of the hoisting rope slipping off the hoisting roller and causing the counterweight to fall.
[0017] Preferably, a wire retaining rod is fixedly arranged on the wire retaining ring, and the wire retaining rod is fixedly connected to the fixed support.
[0018] By adopting the above technical solution, on the one hand, the wire retaining rod restricts the hoisting rope from slipping off the hoisting roller, and on the other hand, the wire retaining rod provides a supporting force for the hoisting roller through the wire retaining ring, sharing the acting force of the hoisting roller on the hoisting shaft.
[0019] Preferably, a contact switch is arranged at the bottom end of the limit rod, the contact switch is used to abut against the top of the welding shaft, and the contact switch is used to control the start and stop of the hoisting motor.
[0020] By adopting the above technical solution, when the welding shaft descends and separates from the contact switch, the contact switch controls the output shaft of the hoisting motor to rotate forward. When the welding shaft ascends and abuts against the contact switch, the contact switch controls the output shaft of the hoisting motor to rotate reversely.
[0021] Preferably, a pressure sensor is fixedly arranged on the top of the movable support, the pressure sensor is located directly below the counterweight, the pressure sensor is used to abut against the counterweight, and the pressure sensor is used to control the start and stop of the hoisting motor.
[0022] By adopting the above technical solution, during the forward rotation of the hoisting motor, when the counterweight abuts against the pressure sensor, the hoisting motor stops running. During the reverse rotation of the hoisting motor, when the counterweight separates from the pressure sensor, the hoisting motor stops running.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. By providing a welding base, a welding shaft, a lifting assembly, a welding head, a fixed bracket, a movable bracket, a limiting rod, a protective cover and a welding groove, during the welding process of the tab and the adapter plate, the tab and the adapter plate are pressed together by the protective cover, improving the welding quality of the tab and the adapter plate;
[0025] 2. By providing a guiding seat, a guiding groove, a guiding block, a clamping groove and a clamping block, the movable bracket moves up and down along the direction in which the guiding groove is opened;
[0026] 3. By providing a lifting motor, a lifting screw rod, a lifting seat and a lifting groove, the welding shaft drives the welding head to lift. Description of the Drawings
[0027] Figure 1 is a schematic structural diagram of a battery tab ultrasonic welding device in an embodiment of the present application.
[0028] Figure 2 is a cross-sectional view showing the connection relationship between the movable bracket and the fixed bracket in an embodiment of the present application.
[0029] Figure 3 is a cross-sectional view showing the connection relationship between the guiding block and the clamping block in an embodiment of the present application.
[0030] Figure 4 is a cross-sectional view showing the connection relationship between the welding head and the welding base in an embodiment of the present application.
[0031] Figure 5 is a cross-sectional view showing the connection relationship between the counterweight and the fixed bracket in an embodiment of the present application.
[0032] Figure 6 is a schematic diagram showing the contact switch and the pressure sensor in an embodiment of the present application.
[0033] Description of the Reference Numerals: 1, welding base; 11, welding shaft; 12, welding head; 2, lifting assembly; 21, lifting motor; 22, lifting screw rod; 23, lifting seat; 24, lifting groove; 3, fixed bracket; 31, movable bracket; 4, limiting rod; 5, protective cover; 51, welding groove; 6, guiding seat; 61, guiding groove; 62, guiding block; 63, clamping groove; 64, clamping block; 7, hoisting roller; 71, hoisting rope; 72, counterweight; 73, hoisting shaft; 8, rope retaining ring; 81, rope retaining rod; 9, hoisting motor; 91, contact switch; 92, pressure sensor. Specific Embodiments
[0034] The following further elaborates on this application in conjunction with the Figure 1-6 accompanying drawings for a more detailed description.
[0035] An embodiment of this application discloses an ultrasonic welding device for battery tabs. Referring to Figure 1 and Figure 2 , it includes a welding base 1, a welding shaft 11 is horizontally installed on the welding base 1, a lifting assembly 2 is installed between the welding shaft 11 and the welding base 1, and the lifting assembly 2 is used to drive the welding shaft 11 to move along the height direction of the welding base 1. A welding head 12 is installed at one end of the welding shaft 11 away from the welding base 1. A fixed bracket 3 is welded on the welding base 1, a movable bracket 31 is installed on the fixed bracket 3, and the movable bracket 31 can slide along the height direction of the fixed bracket 3. A limiting rod 4 is vertically installed between the movable bracket 31 and the welding shaft 11. The top end of the limiting rod 4 is welded to the movable bracket 31, and the bottom end of the limiting rod 4 is used to abut against the welding shaft 11. A protective cover 5 is installed at the bottom of the movable bracket 31, and the protective cover 5 is located below the welding shaft 11. A welding groove 51 is penetrated through the protective cover 5, and the welding head 12 is inserted into the welding groove 51. When welding the tab and the adapter plate together, the stacked tab and adapter plate are placed below the protective cover 5, and then the lifting assembly 2 drives the welding shaft 11 to descend, and the welding shaft 11 drives the welding head 12 to approach the tab and the adapter plate. During the descent of the welding shaft 11, the movable bracket 31 carried on the welding shaft 11 by the limiting rod 4 descends along the fixed bracket 3, and the movable bracket 31 drives the protective cover 5 to descend. When the protective cover 5 descends onto the tab, the lifting assembly 2 continues to drive the welding shaft 11 to descend, causing the welding shaft 11 to separate from the limiting rod 4. At this time, the protective cover 5 presses against the tab to apply a downward force on the tab, pressing the tab against the adapter plate. When the welding head 12 passes through the welding groove 51 and contacts the tab, the lifting assembly 2 stops, and then the welding head 12 operates to weld the tab and the adapter plate together. After the tab and the adapter plate are welded together, the lifting assembly 2 drives the welding shaft 11 to rise, and the welding shaft 11 drives the welding head 12 to separate from the tab. When the welding shaft 11 rises to abut against the bottom end of the limiting rod 4, the welding shaft 11 continues to rise to drive the limiting rod 4 and the movable bracket 31 to move upward, and the movable bracket 31 moving upward drives the protective cover 5 to separate from the tab. During the welding process of the tab and the adapter plate, the tab and the adapter plate are pressed together by the protective cover 5, improving the welding quality of the tab and the adapter plate.
[0036] In order to enable the movable bracket 31 to move along the height direction, referring to Figures 1 to 3, a guide seat 6 is welded on the fixed bracket 3, and a guide groove 61 is formed in the side of the guide seat 6 away from the fixed bracket 3 along the height direction. A guide block 62 is slidably arranged in the guide groove 61, and the guide block 62 is welded to the movable bracket 31. A clamping groove 63 is formed in the guide groove 61 along the height direction, and a clamping block 64 is slidably arranged in the clamping groove 63, and the clamping block 64 is welded to the guide block 62. The movable bracket 31 is slidably mounted on the guide seat 6 through the guide block 62 and the clamping block 64, so that the movable bracket 31 moves up and down along the direction in which the guide groove 61 is formed.
[0037] In order to make the welding shaft 11 drive the welding head 12 to lift and lower, refer to Figure 1 and Figure 4 , the lifting assembly 2 includes a lifting motor 21, a lifting screw 22 and a lifting seat 23. A lifting groove 24 is formed in the side of the welding seat 1 facing the fixed bracket 3 along the height direction, and the lifting motor 21 is installed in the lifting groove 24. One end of the lifting screw 22 is welded to the output shaft of the lifting motor 21, and the other end of the lifting screw 22 is rotatably connected to the inner wall of the lifting groove 24. The lifting seat 23 is threadedly connected to the lifting screw 22, and the lifting seat 23 is slidably arranged in the lifting groove 24. The lifting seat 23 is welded to one end of the welding shaft 11 away from the welding head 12. When the lifting motor 21 is started, it drives the lifting screw 22 to rotate. The rotation of the lifting screw 22 drives the lifting seat 23 to move along the lifting groove 24, and the movement of the lifting seat 23 drives the welding shaft 11 to move along the height direction, so that the welding shaft 11 drives the welding head 12 to lift and lower.
[0038] In order to facilitate the pressing of the tab on the adapter plate, refer to Figures 1 to 6, a hoisting motor 9 is installed on the fixed support 3, and the output shaft of the hoisting motor 9 penetrates through the fixed support 3. A hoisting shaft 73 is installed on the output shaft of the hoisting motor 9, and a hoisting roller 7 is installed on the hoisting shaft 73. The hoisting roller 7 is located above the movable support 31. A hoisting rope 71 is wound around the hoisting roller 7. One end of the hoisting rope 71 is bolted to the hoisting roller 7, and the other end of the hoisting rope 71 is hung with a counterweight 72. The bottom of the counterweight 72 is used to abut against the top of the movable support 31. A contact switch 91 is installed at the bottom end of the limit rod 4, and the contact switch 91 is used to abut against the top of the welding shaft 11. A pressure sensor 92 is installed on the top of the movable support 31. The pressure sensor 92 is located directly below the counterweight 72, and the pressure sensor 92 is used to abut against the counterweight 72. The contact switch 91, the pressure sensor 92, the hoisting motor 9 and the lifting motor 21 are all connected to the electrical control system, and both the contact switch 91 and the pressure sensor 92 are used to control the start and stop of the hoisting motor 9. When the welding shaft 11 descends and separates from the contact switch 91 at the bottom end of the limit rod 4, the contact switch 91 controls the output shaft of the hoisting motor 9 to rotate forward, so that the hoisting roller 7 pays out the wire, and then the counterweight 72 descends. During the forward rotation of the hoisting motor 9, the counterweight 72 descends. When the counterweight 72 abuts against the pressure sensor 92, the hoisting motor 9 stops running, and then the counterweight 72 is abutted against the movable support 31. Thus, the weight of the movable support 31 is increased, and the pressure exerted by the protective cover 5 on the tab is increased, which is convenient for pressing the tab onto the adapter plate. When the welding shaft 11 rises and abuts against the contact switch 91, the contact switch 91 controls the output shaft of the hoisting motor 9 to rotate reversely, so that the hoisting roller 7 winds up the wire, and then the counterweight 72 rises. During the reverse rotation of the hoisting motor 9, when the counterweight 72 separates from the pressure sensor 92, the hoisting motor 9 stops running, and the counterweight 72 is separated from the movable support 31. By setting the hoisting motor 9 to lift the counterweight 72, the load for the lifting seat 23 to drive the movable support 31 to rise is reduced, and the situation of fracture between the movable support 31 and the lifting seat 23 is reduced.
[0039] To reduce the situation of accidental dropping of the counterweight 72, referring to Figures 1 to 6 , a set of rope retaining rings 8 is sleeved on the hoisting roller 7. The rope retaining rings 8 are rotatably connected to the hoisting roller 7, and the hoisting rope 71 is located between the rope retaining rings 8. A rope retaining rod 81 is installed on the rope retaining ring 8, and the rope retaining rod 81 is welded to the fixed support 3. The hoisting rope 71 is restricted between the rope retaining ring 8 and the rope retaining rod 81, reducing the situation of the counterweight 72 dropping due to the hoisting rope 71 slipping off the hoisting roller 7. At the same time, the rope retaining rod 81 installed on the fixed support 3 provides a supporting force for the hoisting roller 7 through the rope retaining ring 8, sharing the acting force of the hoisting roller 7 on the hoisting shaft 73.
[0040] The implementation principle of an ultrasonic welding device for battery tabs in an embodiment of the present application is as follows: When welding a tab to an adapter plate, the stacked tabs and adapter plate are placed under the protective cover 5, and then the lifting assembly 2 drives the welding shaft 11 to descend. The welding shaft 11 drives the welding head 12 to approach the tabs and the adapter plate. During the descent of the welding shaft 11, the movable bracket 31 carried on the welding shaft 11 by the limit rod 4 descends along the fixed bracket 3, and the movable bracket 31 drives the protective cover 5 to descend. When the protective cover 5 descends onto the tab, the lifting assembly 2 continues to drive the welding shaft 11 to descend, causing the welding shaft 11 to separate from the limit rod 4. At this time, the protective cover 5 presses against the tab to apply a downward force to the tab, pressing the tab onto the adapter plate. When the welding head 12 passes through the welding groove 51 and contacts the tab, the lifting assembly 2 stops, and then the welding head 12 operates to weld the tab to the adapter plate together. After the tab is welded to the adapter plate, the lifting assembly 2 drives the welding shaft 11 to rise, and the welding shaft 11 drives the welding head 12 to separate from the tab. When the welding shaft 11 rises to abut against the bottom end of the limit rod 4, the welding shaft 11 continues to rise to drive the limit rod 4 and the movable bracket 31 to move upward, and the upward movement of the movable bracket 31 drives the protective cover 5 to separate from the tab. During the welding process of the tab and the adapter plate, the tab and the adapter plate are pressed together by the protective cover 5 to improve the welding quality of the tab and the adapter plate.
[0041] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A battery tab ultrasonic welding device, comprising a welding seat (1), a welding shaft (11) being arranged on the welding seat (1), a lifting assembly (2) being arranged between the welding shaft (11) and the welding seat (1), the lifting assembly (2) being used to drive the welding shaft (11) to move along the height direction of the welding seat (1), a welding head (12) being fixedly arranged at one end of the welding shaft (11) away from the welding seat (1), characterized in that: A fixed bracket (3) is arranged on the welding seat (1), a movable bracket (31) is slidably arranged on the fixed bracket (3), a limiting rod (4) is arranged between the movable bracket (31) and the welding shaft (11), the top end of the limiting rod (4) is fixedly connected to the movable bracket (31), the bottom end of the limiting rod (4) is used to abut against the welding shaft (11), a protective cover (5) is fixedly arranged at the bottom of the movable bracket (31), the protective cover (5) is located below the welding shaft (11), a welding groove (51) is penetrated through the protective cover (5), and the welding groove (51) is for inserting the welding head (12).
2. The battery tab ultrasonic welding device according to claim 1, characterized in that: A guide seat (6) is fixedly arranged on the fixed bracket (3), a guide groove (61) is provided in the guide seat (6), a guide block (62) is slidably arranged in the guide groove (61), the guide block (62) is fixedly connected to the movable bracket (31), a clamping groove (63) is provided in the guide groove (61), a clamping block (64) is slidably arranged in the clamping groove (63), and the clamping block (64) is fixedly connected to the guide block (62).
3. The battery tab ultrasonic welding equipment according to claim 1, characterized in that: The lifting assembly (2) comprises a lifting motor (21), a lifting screw (22) and a lifting seat (23); a lifting slot (24) is provided on the welding seat (1) facing the fixed bracket (3); the lifting motor (21) is fixedly arranged in the lifting slot (24); one end of the lifting screw (22) is fixedly connected to the output shaft of the lifting motor (21); the other end of the lifting screw (22) is rotatably connected to the inner wall of the lifting slot (24); the lifting seat (23) is threadedly connected to the lifting screw (22); the lifting seat (23) is slidably arranged in the lifting slot (24); and the lifting seat (23) is fixedly connected to one end of the welding shaft (11) away from the welding head (12).
4. The battery tab ultrasonic welding device according to claim 1, characterized in that: A hoisting roller (7) is arranged above the movable bracket (31), a hoisting rope (71) is wound around the hoisting roller (7), one end of the hoisting rope (71) is fixedly connected to the hoisting roller (7), a counterweight (72) is arranged at the other end of the hoisting rope (71), the bottom of the counterweight (72) is used to abut against the top of the movable bracket (31), a hoisting motor (9) is fixedly arranged on the fixed bracket (3), a hoisting shaft (73) is fixedly arranged on the output shaft of the hoisting motor (9), and the hoisting shaft (73) is fixedly connected to the hoisting roller (7).
5. The battery tab ultrasonic welding equipment according to claim 4, characterized in that: A group of rope blocking rings (8) are sleeved on the hoisting roller (7), the rope blocking rings (8) are rotatably connected to the hoisting roller (7), and the hoisting rope (71) is located between the rope blocking rings (8).
6. The battery tab ultrasonic welding equipment according to claim 5, characterized in that: A rope blocking rod (81) is fixedly arranged on the rope blocking ring (8), and the rope blocking rod (81) is fixedly connected to the fixed bracket (3).
7. The battery tab ultrasonic welding device according to claim 4, characterized in that: A contact switch (91) is arranged at the bottom end of the limit rod (4), and the contact switch (91) is used to abut against the top of the welding shaft (11), and the contact switch (91) is used to control the start and stop of the hoisting motor (9).
8. The battery tab ultrasonic welding device according to claim 4, characterized in that: A pressure sensor (92) is fixedly arranged on the top of the movable bracket (31), and the pressure sensor (92) is located directly below the counterweight block (72). The pressure sensor (92) is used to abut against the counterweight block (72), and the pressure sensor (92) is used to control the start and stop of the hoisting motor (9).
Citation Information
Patent Citations
Lithium ion battery lead ultrasonic welding method and lead welding protection method
CN107671414A