Welding jig for battery piece
By designing a cell welding fixture including a bracket, a first fixture, a second fixture, a drive piece and a laser welding assembly, the problem that traditional press holder fixtures cannot effectively weld the singular cell, and efficient welding of odd and even cell cells is achieved, and production efficiency and quality are improved.
Patent Information
- Application Number
- CN202421481861.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-26
AI Technical Summary
During the battery cell production process, traditional press-holding fixtures cannot effectively solve the problem of the collision between the traction device and press-holding fixture during welding of singular battery cells, resulting in the inability to meet production requirements.
A cell welding fixture including a bracket, a first fixture, a second fixture, a first drive piece, a second drive piece and a laser welding assembly is designed. The first fixture and the second fixture are driven to lift and lower the first and second fixtures to meet the welding requirements of odd and even battery cells.
The welding fixture can effectively avoid the collision between the first fixture and the traction device, meet the welding needs of different numbers of battery cells, and improve production efficiency and welding quality.
Smart Images
Figure CN222754624U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery cell production, in particular to a welding jig for battery cells. Background Art
[0002] During the production process of battery cells, welding wire is welded on the surface of multiple battery cells to complete the series processing of battery cells. When the production requires welding only two adjacent battery cells, there is a need to supply shorter welding wires multiple times, that is, the traction device is required to clamp and pull out the welding wire multiple times and then cut it to form welding wire segments, and then transfer the welding wire to the surface of the battery cell to complete the wire supply demand. At the same time, the specifications of the holding fixture used for welding are relatively small, that is, the welding holding fixture is limited to holding two battery cells, and multiple battery cells inevitably have even and odd numbers. When the number of multiple battery cells is odd, the last welded battery cell is odd. If a traditional holding fixture is used, the holding fixture collides with the traction device, which cannot meet the production requirements and needs to be improved. Summary of the invention
[0003] In order to overcome the problem of collision between the pulling shape of the welding wire and the holding fixture in the prior art, the purpose of the utility model is to provide a welding fixture for battery cells to solve the welding problem of a single battery cell.
[0004] To achieve the above purpose, the technical solution of the utility model is:
[0005] A welding fixture for a battery cell, comprising a bracket, a first fixture, a second fixture, a first driving member, a second driving member and a laser welding assembly;
[0006] The first driving member is arranged on the bracket and drives the first fixture to rise and fall, the second driving member is arranged on the bracket and drives the second fixture to rise and fall, the first fixture and the second fixture are arranged at a distance, and the laser welding assembly is arranged on the bracket;
[0007] The first fixture and the second fixture both include a fixed plate and a plurality of pressure rods, which are arranged on the same side of the fixed plate, one end of each pressure rod is connected to the fixed plate, and the other end of each pressure rod is used to fix the external welding wire on the surface of the external battery cell.
[0008] Furthermore, the first fixture and the second fixture further include a plurality of connecting plates, the connecting plates are spaced apart from the fixing plates, and one connecting plate is connected to a plurality of pressure rods.
[0009] Furthermore, each of the pressure rods includes a shaft sleeve, a movable rod and a reset member, the two ends of the shaft sleeve are respectively connected to the fixed plate and the connecting plate, the movable rod is slidably connected to the shaft sleeve, and the reset member is arranged on the shaft sleeve and drives the movable rod to reset.
[0010] Furthermore, the shaft sleeve is provided with a through hole and a limiting hole, the limiting hole is arranged around the through hole, the movable rod includes a main body and a convex ring convexly arranged on the main body, the main body slides along the through hole, the convex ring and the limiting hole are surrounded by an accommodating cavity, and the reset member is arranged in the accommodating cavity to control the sliding distance of the movable rod.
[0011] Furthermore, the first driving member and the second driving member both include a driving source, a guide rail, a first slide and a mounting plate, the guide rail is arranged on the bracket, the driving source is arranged on the guide rail and drives the first slide to slide along the guide rail, the mounting plate is arranged on the first slide, and the fixing plate is arranged on the mounting plate.
[0012] Furthermore, the battery cell welding fixture also includes a third driving member and a fourth driving member, the third driving member is arranged on the bracket and drives the first driving member to move horizontally, and the fourth driving member is arranged on the bracket and drives the second driving member to move horizontally.
[0013] Furthermore, the third driving member and the fourth driving member each include an adjusting knob and a second slide seat, the adjusting knob is disposed on the bracket and drives the second slide seat to move horizontally, the first driving member is disposed on the second slide seat, and the second driving member is disposed on the second slide seat.
[0014] The beneficial effects of the utility model are as follows: by setting a welding jig for a battery cell composed of a bracket, a first jig, a second jig, a first driving member, a second driving member and a laser welding assembly, the first driving member drives the first jig to rise and fall, and the second driving member drives the second jig to rise and fall, thereby meeting the welding requirements of odd and even battery cells. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0016] Figure 2 This is a schematic diagram of the separation structure of the first driving member and the first fixture of the utility model;
[0017] Figure 3 It is a schematic diagram of the structure of the first fixture, the second fixture and the external battery cell of the utility model;
[0018] Figure 4 This is a three-dimensional cross-sectional view of the first fixture of the utility model;
[0019] Figure 5 It is a schematic diagram of the planar structure of the movable rod and the connecting plate of the utility model;
[0020] Figure 6 It is a schematic diagram of the structures of the first driving member, the second driving member, the third driving member and the fourth driving member of the utility model.
[0021] Reference numerals include:
[0022] 1—bracket 2—first fixture 21—fixing plate
[0023] 22—pressure rod 221—shaft sleeve 222—movable rod
[0024] 223—reset member 224—accommodating cavity 23—connecting plate
[0025] 3—Second fixture 4—First driving member 5—Second driving member
[0026] 41—driving source 42—guide rail 43—first slide
[0027] 44—mounting plate 6—laser welding assembly 7—third driving member
[0028] 8—fourth driving member 71—adjusting knob 72—second slide
[0029] 100—Battery cell. DETAILED DESCRIPTION
[0030] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.
[0031] See also Figures 1 to 6 The utility model discloses a welding fixture for a battery cell, comprising a bracket 1, a first fixture 2, a second fixture 3, a first driving member 4, a second driving member 5 and a laser welding assembly 6;
[0032] The first driving member 4 is disposed on the bracket 1 and drives the first fixture 2 to rise and fall, the second driving member 5 is disposed on the bracket 1 and drives the second fixture 3 to rise and fall, the first fixture 2 and the second fixture 3 are spaced apart, and the laser welding assembly 6 is disposed on the bracket 1;
[0033] The first fixture 2 and the second fixture 3 both include a fixed plate 21 and a plurality of pressure rods 22. The plurality of pressure rods 22 are arranged on the same side of the fixed plate 21. One end of each pressure rod 22 is connected to the fixed plate 21, and the other end of each pressure rod 22 is used to fix the external welding wire on the surface of the external battery cell 100.
[0034] Specifically, in this embodiment, the first driving member 4 and the second driving member 5 are respectively installed on the opposite sides of the bracket 1, the first driving member 4 drives the first fixture 2 to rise and fall, and the second driving member 5 drives the second fixture 3 to rise and fall. When the number of external battery cells 100 to be welded is even, first, the external traction mechanism clamps the welding wire and pulls it out to a preset position, and then the wire cutting mechanism cuts the welding wire to form welding wire segments. The traction mechanism is located obliquely below the first fixture 2, and the first fixture 2 and the second fixture 3 descend at the same time. The external traction mechanism is staggered with the first fixture 2. The first fixture 2 presses the external welding wire segment on the surface of one battery cell 100, and the second fixture 3 presses the same welding wire segment on the surface of another battery cell 100. The laser welding assembly 6 completes the welding process of the welding wire segment and the battery cell 100, that is, the first fixture 2 and the second fixture 3 descend at the same time for several times, and the welding of the battery cells can be completed. When the number of external battery cells 100 to be welded is even, When the quantity is odd, the last battery cell needs to be welded separately. The external traction mechanism clamps the welding wire and pulls it out to the preset position, and then the wire cutting mechanism cuts the welding wire to form a welding wire segment. The traction mechanism is located obliquely below the second fixture 3. The second fixture 3 descends, and the external traction mechanism is staggered with the second fixture 3, that is, the second fixture 3 descends to press the external welding wire segment on the surface of the battery cell 100, and then the laser welding assembly 6 completes the welding process of the welding wire segment and the battery cell. Therefore, the first fixture 2 and the second fixture 3 are independently controlled to lift and lower the structure to meet the different processing requirements of the battery cell number being even or odd, thereby avoiding the phenomenon that the first fixture 2 collides with the external traction mechanism when a single battery cell needs to be welded. Preferably, the first fixture 2 and the second fixture 3 have the same structure and the same working principle. The two adjacent pressure rods 22 are arranged at a distance, and the pressure rod 22 presses the welding wire on the surface of the battery cell, which has a fixing effect and improves the controllability of welding quality.
[0035] By setting up a battery cell welding jig consisting of a bracket 1, a first jig 2, a second jig 3, a first driving member 4, a second driving member 5 and a laser welding assembly 6, the first driving member 4 drives the first jig 2 to rise and fall, and the second driving member 5 drives the second jig 3 to rise and fall, thereby meeting the welding requirements of odd and even battery cells.
[0036] The first fixture 2 and the second fixture 3 also include a plurality of connecting plates 23, which are spaced apart from the fixed plate 21, and one connecting plate 23 is connected to a plurality of pressure rods 22. The connecting plate 23 is located in the middle of the pressure rod 22, and has the purpose of fixing the pressure rod 22 to avoid the deviation of the central axis of the pressure rod 22 during the working process, thereby further ensuring the stability of production quality.
[0037] Each of the pressure rods 22 includes a sleeve 221, a movable rod 222 and a reset member 223. The two ends of the sleeve 221 are respectively connected to the fixed plate 21 and the connecting plate 23. The movable rod 222 is slidably connected to the sleeve 221. The reset member 223 is arranged on the sleeve 221 and drives the movable rod 222 to reset. The reset member 223 adopts a spring structure, so that the movable rod 222 has a rebound force when it touches the upper surface of the external battery cell 100, thereby avoiding the possibility of a large instantaneous pressure acting on the surface of the battery cell 100 to cause a collision with the battery cell 100, thereby improving the battery processing quality.
[0038] The shaft sleeve 221 is provided with a through hole and a limiting hole, the limiting hole is arranged around the through hole, the central axis of the limiting hole coincides with the central axis of the through hole, the limiting hole starts from the lower end surface of the shaft sleeve 221, the movable rod 222 includes a main body and a convex ring protruding from the main body, the central axis of the convex ring coincides with the central axis of the main body, the main body slides along the through hole, the convex ring and the limiting hole are surrounded by an accommodating cavity 224, the reset member 223 is arranged in the accommodating cavity 224 to control the sliding distance of the movable rod 222, when the movable rod 222 contacts the surface of the external battery cell, when the main body slides upward relative to the shaft sleeve 221, the height of the accommodating cavity 224 is compressed, the reset member 223 is compressed to generate elastic force, when the movable rod 222 is separated from the surface of the external battery cell 100, the reset member 223 releases the elastic force, and the movable rod 222 moves downward until it is reset.
[0039] The first driving member 4 and the second driving member 5 both include a driving source 41, a guide rail 42, a first slide 43 and a mounting plate 44. The guide rail 42 is arranged on the bracket 1, the driving source 41 is arranged on the guide rail 42 and drives the first slide 43 to slide along the guide rail 42, the mounting plate 44 is arranged on the first slide 43, and the fixed plate 21 is arranged on the mounting plate 44. The driving source 41 adopts a servo motor driving structure to make the first slide 43 reciprocate along the guide rail 42, thereby ensuring the stability of the fixing plate 21 in the lifting direction, that is, ensuring the stability of the lifting direction of the first fixture 2 and the second fixture 3.
[0040] The welding jig of the battery cell also includes a third driving member 7 and a fourth driving member 8. The third driving member 7 is arranged on the bracket 1 and drives the first driving member 4 to move horizontally. The fourth driving member 8 is arranged on the bracket 1 and drives the second driving member 5 to move horizontally. The third driving member 7 and the fourth driving member 8 are arranged to adjust the horizontal spacing between the first jig 2 and the second jig 3, so as to meet the processing requirements of different specifications of external battery cells 100.
[0041] The third driving member 7 and the fourth driving member 8 both include an adjusting knob 71 and a second slide 72. The adjusting knob 71 is disposed on the bracket 1 and drives the second slide 72 to move horizontally. The first driving member 4 is disposed on the second slide 72. The second driving member 5 is disposed on the second slide 72. The adjusting knob 71 adopts a micrometer structure to adjust the horizontal spatial position of the second slide 72 to meet different processing requirements.
[0042] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.
Claims
1. A welding fixture for a battery cell, characterized in that: It comprises a bracket (1), a first fixture (2), a second fixture (3), a first driving member (4), a second driving member (5) and a laser welding assembly (6); The first driving member (4) is arranged on the support (1) and drives the first jig (2) to move up and down, the second driving member (5) is arranged on the support (1) and drives the second jig (3) to move up and down, the first jig (2) and the second jig (3) are arranged at a distance, and the laser welding assembly (6) is arranged on the support (1); The first fixture (2) and the second fixture (3) both comprise a fixing plate (21) and a plurality of pressure rods (22), wherein the plurality of pressure rods (22) are arranged on the same side of the fixing plate (21), one end of each pressure rod (22) is connected to the fixing plate (21), and the other end of each pressure rod (22) is used to fix the external welding wire on the surface of the external battery cell (100).
2. The battery cell welding jig according to claim 1, characterized in that: The first fixture (2) and the second fixture (3) further include a plurality of connecting plates (23), the connecting plates (23) being spaced apart from the fixing plates (21), and one connecting plate (23) being connected to a plurality of pressure rods (22).
3. The battery cell welding jig according to claim 2, characterized in that: Each of the pressure rods (22) comprises a shaft sleeve (221), a movable rod (222) and a reset member (223); two ends of the shaft sleeve (221) are respectively connected to the fixed plate (21) and the connecting plate (23); the movable rod (222) is slidably connected to the shaft sleeve (221); and the reset member (223) is arranged on the shaft sleeve (221) and drives the movable rod (222) to reset.
4. The battery cell welding jig according to claim 3, characterized in that: The shaft sleeve (221) is provided with a through hole and a limiting hole, the limiting hole is arranged around the through hole, the movable rod (222) comprises a main body and a convex ring convexly arranged on the main body, the main body slides along the through hole, the convex ring and the limiting hole are surrounded by a receiving cavity (224), and the reset member (223) is arranged in the receiving cavity (224) for controlling the sliding distance of the movable rod (222).
5. The battery cell welding jig according to claim 1, characterized in that: The first driving member (4) and the second driving member (5) both comprise a driving source (41), a guide rail (42), a first slide seat (43) and a mounting plate (44); the guide rail (42) is arranged on the bracket (1); the driving source (41) is arranged on the guide rail (42) and drives the first slide seat (43) to slide along the guide rail (42); the mounting plate (44) is arranged on the first slide seat (43); and the fixing plate (21) is arranged on the mounting plate (44).
6. The battery cell welding jig according to claim 1, characterized in that: The battery cell welding fixture further comprises a third driving member (7) and a fourth driving member (8); the third driving member (7) is arranged on the bracket (1) and drives the first driving member (4) to move horizontally; and the fourth driving member (8) is arranged on the bracket (1) and drives the second driving member (5) to move horizontally.
7. The battery cell welding jig according to claim 6, characterized in that: The third driving member (7) and the fourth driving member (8) both comprise an adjusting knob (71) and a second slide seat (72); the adjusting knob (71) is arranged on the bracket (1) and drives the second slide seat (72) to move horizontally; the first driving member (4) is arranged on the second slide seat (72); and the second driving member (5) is arranged on the second slide seat (72).