Welding device for battery cell structure

Abstract

The invention relates to a welding device for a battery cell structure, which comprises a support frame and a rotary table rotationally arranged on the support frame, a bending assembly is arranged above the rotary table, and the bending assembly comprises a motor, a bending plate and a stop lever, and the bending plate and the stop lever are driven by the motor. The motor drives the bending plate to move to the side faces of the tabs of the cell battery and meanwhile drives the blocking rod to move to the side faces of the tabs, the pressing assembly is arranged above the supporting frame, and in the downward pressing process of the pressing assembly, the bending plate is driven to rotate so that the two tabs on the left side in the cell assembly can be bent rightwards, and the two tabs on the right side can be bent leftwards. A vacant site is reserved at the bent position of the tab through a blocking rod, the transfer piece and the tab are driven to press downwards to press the reserved vacant site in the pressing process of the pressing assembly, laser welding is conducted on the tab and the transfer piece through a welding mechanical arm arranged on the side, and the problem that before welding, the tab cannot be completely flattened through a bending block, and the welding efficiency is high is solved. And the bent part is easy to break in the tab bending process, so that the subsequent safety is influenced.

Description

Technical Field

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

[0002] In today's era of the prevalence of new energy, new energy is also constantly developing. In terms of energy storage, the requirements for the volume density of batteries are getting higher and higher. High-capacity batteries are gradually becoming the mainstream today. Common batteries are square, cylindrical and soft-pack. In mainstream batteries, the battery core is a double-roll core, the tabs are bent in a free state, and are ultrasonically welded with the adapter. As a result, the battery needs to free up some space for the tabs and the adapter, and the tabs are easy to break, reducing space utilization and safety.

[0003] A Chinese invention patent with application publication number CN104551675A discloses a battery pole ear bending welding device, including a lower mold base, on which are two left and right clamping molds for clamping the pole group, and serrated pole ear isolation plates for positioning the pole ears are provided on the front and rear sides of the pole group, a busbar plate is fixed above the pole ear isolation plate, and an upper mold is provided above the lower mold base. The pole ear of the pole group has a V-shaped cross-section, including two side wings that can be bent to the left and right sides, and the upper mold is provided with a V-shaped bending block at the corresponding upper position of each pole ear, and a high-temperature heating gun is provided between two adjacent V-shaped bending blocks, which can solve the problems of low welding efficiency, easy to produce cold welding and false welding in traditional manual welding, and the amount of lead wire used is small and the cost is low.

[0004] However, the inventors found that the device has the following problems: the tab cannot be completely flattened by the bending block before welding, which makes it easy for problems to occur during the welding process, and the tab is prone to breakage at the bend during the bending process, affecting subsequent safety. Summary of the invention

[0005] The purpose of the present invention is to invent a welding device for a battery core structure in view of the deficiencies in the prior art, wherein four battery cells are pushed into the turntable accommodating groove through a loading assembly, and when the battery cells are transferred to the next workstation with the battery, a motor drives a bending plate to move toward the battery and drives a shift lever to move the side of the battery pole ear, and during the pressing process of the pressing assembly, the bending plate is driven to rotate to bend the two pole ears on the right side to the left and the two pole ears on the left side to the right, and the bending part of the pole ears is protected by the shift lever, and when it is transferred to the bottom of the pressing assembly after bending, an adapter plate is placed above the pole ear, and the adapter plate is driven downward by the pressing assembly to flatten the pole ear, and at the same time, the pole ear and the adapter plate are laser welded by a welding robot on the side, and finally the unloading is completed by the unloading assembly, thereby solving the problem that the pole ear cannot be completely flattened by the bending block before welding, which leads to problems during the welding process, and the bending part of the pole ear is prone to breakage during the bending process, which affects the subsequent safety.

[0006] In view of the above technical problems, the technical solution adopted by the present invention is as follows: a welding device for a battery core structure, comprising a support frame and a turntable rotatably arranged on the support frame, the surface of the turntable is provided with a plurality of receiving grooves for placing the battery core components along its circumferential direction, the battery core components include four battery cells, a loading assembly for delivering the battery core components to the receiving grooves is provided on the side of the turntable, a bending assembly is provided above the turntable at the next station of the loading assembly, the bending assembly comprises a motor and a bending plate and a gear lever driven by the motor, the motor drives the bending plate to move to While moving the shift lever to the side of the pole ear of the battery cell, a pressing assembly is arranged above the support frame. During the pressing process of the pressing assembly, the bending plate is driven to rotate to bend the two pole ears on the left side of the battery cell assembly to the right and the two pole ears on the right side to the left, and a space is reserved at the bending position of the pole ears through the shift lever. During the pressing process of the pressing assembly, the adapter plate and the pole ear are driven to press down to press the reserved space, and the pole ear and the adapter plate are laser welded by a welding robot arranged on the side. A blanking assembly for blanking the battery cell assembly is arranged on the support frame.

[0007] As a preferred embodiment, the loading assembly includes a conveyor belt arranged on the side of the turntable, the conveyor belt is used to transport the battery cell assembly, a support platform is arranged on the side of the conveyor belt, a loading cylinder is arranged on the support platform, a loading plate is arranged on the output shaft of the loading cylinder, and the loading cylinder drives the loading plate to push the battery cell assembly on the conveyor belt into the receiving groove.

[0008] As a preferred embodiment, a placement plate is provided on the support frame, and a plurality of slide rails corresponding to the battery cells are provided on the placement plate, a slider is slidably provided in the slide rail, a threaded rod is provided on the side of the slider, and the gear rod is provided on the threaded rod, and a gear a meshing with the threaded rod is rotatably provided on the end surface of the slide rail, a synchronous belt a is sleeved between the plurality of gears a, a gear b meshing with the synchronous belt a is provided at the center position of the placement plate, a motor is provided below the placement plate, a gear c is provided on the output shaft of the motor, and a synchronous belt b is sleeved between the gear c and the gear b.

[0009] As a preferred embodiment, a hinged seat is provided on the placement plate, a rotating rod is slidably provided in the hinged seat, a gear d is rotatably provided on the end face of the hinged seat, a clamping block is provided on the surface of the rotating rod, the rotating rod is clamped in the gear d through the clamping block, the bending plate is provided on the rotating rod, a linkage block is provided between the rotating rod and the gear rod, and the linkage block is used to drive the rotating rod and the gear rod to move simultaneously.

[0010] Preferably, a fixed plate is arranged above the support frame, and the pressing assembly includes a pressing cylinder arranged above the fixed plate, a movable plate is arranged on the output shaft of the pressing cylinder, a pressing plate is arranged on the side of the movable plate, the pressing plate is arranged above the accommodating groove, a linkage rod is arranged on the side of the movable plate, and a rack is arranged on the side of the linkage rod. During the descent of the linkage rod, the rotating rod is driven to rotate by the rack, thereby driving the bending plate to rotate to bend the pole ear.

[0011] Preferably, a through hole is opened on the side of the accommodating groove, and the unloading assembly includes a unloading cylinder arranged on the upper end surface of the support frame, and a unloading plate is arranged on the output shaft of the unloading cylinder, and the size of the unloading plate is set to be the same as the through hole, and a unloading belt corresponding to the through hole is arranged on the side of the turntable.

[0012] Preferably, the width of the bending plate is greater than the length of the battery cell tab.

[0013] As a preference, the height of the bending plate is higher than the height of the stop rod, and the distance between the bending plate and the stop rod after being bent is equal to the thickness of the tab.

[0014] As a preferred embodiment, the position of the lever after being extended is in contact with the upper end surface of the battery cell and the surface of the tab at the same time.

[0015] Preferably, a baffle is provided on the side of the support platform, and an end face of the baffle coincides with an end face of the accommodating groove.

[0016] Beneficial effects of the present invention:

[0017] 1. The motor rotates to drive the threaded rod to move, and at the same time, the lever moves toward the pole ear, and at the same time, the bending plate is driven to move together through the linkage block. When the lever is moved to the bottom of the pole ear, the bending plate can be used to bend the pole ear through the lever to protect the pole ear, thereby preventing the pole ear from breaking during the bending process and improving safety.

[0018] 2. By providing bending plates on both sides of the accommodating groove, and bending the pole ears of the two batteries on the left to the right and the pole ears of the two batteries on the right to the left through the two bending plates with different rotation directions, and finally welding them through the adapter, it is avoided that the pole ears are bent in a free state, thereby improving the space utilization.

[0019] 3. A moving plate is arranged on the output shaft of the pressing cylinder, a linkage rod is connected to the moving plate, and a rack is arranged on the side of the linkage rod. When the pressing cylinder drives the moving plate downward, the gear d is driven to rotate through the rack, and the rotating rod is driven to rotate through the block, so that the bending plate bends the pole ear, thereby improving the production efficiency and imitating the manual bending action to make the pole ear bend more smoothly.

[0020] In summary, the equipment has the advantages of large space utilization, good safety, high bending efficiency, etc., and is particularly suitable for the field of battery production technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a welding device for a battery core structure;

[0023] Figure 2 A schematic diagram of the structure of a press-fit assembly of a welding device for a battery core structure;

[0024] Figure 3 It is a partial structural schematic diagram of a welding device for a battery core structure;

[0025] Figure 4 It is a structural schematic diagram of a feeding assembly of a welding device for a battery core structure;

[0026] Figure 5 It is a structural schematic diagram of a blanking assembly of a welding device for a battery core structure;

[0027] Figure 6 It is a partial enlarged view of a welding device for a battery core structure;

[0028] Figure 7 A partial cross-sectional view of a welding device for a battery core structure;

[0029] Figure 8 It is a working state diagram of a welding device for a battery core structure;

[0030] Fig. 9 The figure is a working state diagram of a welding device for a battery core structure.

[0031] Figures marked: 1. Support frame; 2. Turntable; 3. Battery cell assembly; 4. Receiving slot; 5. Battery cell; 6. Loading assembly; 7. Bending assembly; 8. Motor; 9. Bending plate; 10. Gear lever; 11. Pressing assembly; 12. Welding manipulator; 13. Unloading assembly; 21. Conveyor belt; 22. Support table; 23. Loading cylinder; 24. Loading plate; 31. Placement plate; 32. Slide rail; 33. Slider; 34. Threaded rod; 35. Gear a; 36. Synchronous belt a; 37. Gear b; 38. Gear c; 39. Synchronous belt b; 41. Articulated seat; 42. Rotating rod; 43. Gear d; 44. Block; 45. Linkage block; 51. Fixed plate; 52. Pressing cylinder; 53. Moving plate; 54. Pressing plate; 55. Linkage rod; 56. Rack; 61. Through hole; 62. Unloading cylinder; 63. Unloading plate; 64. Unloading belt; 91. Baffle. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0033] Embodiment 1

[0034] like Figures 1 to 9 As shown, a welding device for a battery cell structure comprises a support frame 1 and a turntable 2 rotatably arranged on the support frame 1, wherein the surface of the turntable 2 is provided with a plurality of receiving grooves 4 for placing a battery cell assembly 3 along its circumferential direction, wherein the battery cell assembly 3 comprises four battery cells 5, and a loading assembly 6 for delivering the battery cell assembly 3 to the receiving groove 4 is provided on the side of the turntable 2, and a bending assembly 7 is provided above the turntable 2 at the next station of the loading assembly 6, wherein the bending assembly 7 comprises a motor 8 and a bending plate 9 and a gear lever 10 driven by the motor 8, wherein the motor 8 drives the bending plate 9 to move to the side of the pole ear of the battery cell 5 The shift rod 10 is driven to move to the side of the pole ear. A pressing assembly 11 is arranged above the support frame 1. During the pressing process of the pressing assembly 11, the bending plate 9 is driven to rotate to bend the two pole ears on the left side of the battery cell assembly 3 to the right and the two pole ears on the right side to the left. During the bending process of the pole ears, the shift rod 10 is used to reserve a space at the bending position of the pole ears. During the pressing process of the pressing assembly 11, the adapter plate and the pole ear are pressed down to press the reserved space, and the pole ear and the adapter plate are laser welded by a welding robot 12 arranged on the side. A blanking assembly 13 for blanking the battery cell assembly 3 is arranged on the support frame 1.

[0035] It is worth mentioning here that the turntable is divided into four workstations: loading, bending, welding, and unloading. The four workstations work simultaneously. When the motor drives the bending plate 9 and the gear rod 10 to move toward the pole ear, the pressing assembly 11 presses down at the same time. When the bending plate 9 and the gear rod 10 finish moving, the pressing assembly 11 drives the bending plate 9 to bend the pole ear. After bending, the battery cell assembly 3 is transferred to the welding station. Under the action of the pressing assembly 11, the adapter plate is lowered and pressed against the pole ear. Laser welding is performed by the welding robot. After welding, it is transferred to the unloading station for unloading.

[0036] like Figure 4 As shown, the loading assembly 6 includes a conveyor belt 21 arranged on the side of the turntable 2, and the conveyor belt 21 is used to transport the battery cell assembly 3. A support platform 22 is arranged on the side of the conveyor belt 21, and a loading cylinder 23 is arranged on the support platform 22. A loading plate 24 is arranged on the output shaft of the loading cylinder 23, and the loading cylinder 23 drives the loading plate 24 to push the battery cell assembly 3 on the conveyor belt 21 into the accommodating groove 4.

[0037] It is worth mentioning that after the turntable 2 stops rotating, the loading plate 24 is directly opposite to the receiving groove 4 , and at this time, the loading cylinder 23 pushes the battery cell assembly 3 on the conveyor belt 21 into the receiving groove 4 through the loading plate 24 .

[0038] like Figure 3 , Figure 7 As shown, a placement plate 31 is provided on the support frame 1, and a plurality of slide rails 32 corresponding to the battery cells 5 are provided on the placement plate 31, a slider 33 is slidably provided in the slide rail 32, a threaded rod 34 is provided on the side of the slider 33, the gear rod 10 is provided on the threaded rod 34, a gear a35 meshing with the threaded rod 34 is rotatably provided on the end surface of the slide rail 32, a synchronous belt a36 is sleeved between the plurality of gears a35, a gear b37 meshing with the synchronous belt a36 is provided at the center position of the placement plate 31, the motor 8 is provided below the placement plate 31, a gear c38 is provided on the output shaft of the motor 8, and a synchronous belt b39 is sleeved between the gear c38 and the gear b37.

[0039] It is worth mentioning here that while the synchronous belt a36 drives several gears a35 to rotate, the threaded rod 34 slides to drive the gear lever 10 to move to the bending part of the pole ear, so that the gear lever can protect the bending part when the pole ear is bent to prevent the pole ear from breaking after bending.

[0040] like Figure 3 , Figure 6As shown, a hinge seat 41 is provided on the placement plate 31, a rotating rod 42 is slidably provided in the hinge seat 41, a gear d43 is rotatably provided on the end face of the hinge seat 41, a clamping block 44 is provided on the surface of the rotating rod 42, the rotating rod 42 is clamped in the gear d43 through the clamping block 44, the bending plate 9 is provided on the rotating rod 42, a linkage block 45 is provided between the rotating rod 42 and the gear rod 10, and the linkage block 45 is used to drive the rotating rod 42 and the gear rod 10 to move simultaneously.

[0041] It is worth mentioning here that the surface of the placement plate 31 is provided with hinge seats 41 on both sides of the battery cell assembly 3, and rotating rods 42 are slidably provided on the hinge seats 41 on both sides. The rotating rod 42 can move synchronously with the gear lever 10 driven by the linkage block 45 through the clamping block 44, and can rotate under the action of the gear d43.

[0042] like Figure 2 , Figure 6 As shown, a fixed plate 51 is arranged above the support frame 1, and the pressing assembly 11 includes a pressing cylinder 52 arranged above the fixed plate 51, a movable plate 53 is arranged on the output shaft of the pressing cylinder 52, a pressing plate 54 is arranged on the side of the movable plate 53, and the pressing plate 54 is arranged above the accommodating groove 4, a linkage rod 55 is arranged on the side of the fixed rod 52, and a rack 56 is arranged on the side of the linkage rod 55. During the descent of the linkage rod 55, the rotating rod 42 is driven to rotate through the rack 56, thereby driving the bending plate 9 to rotate to bend the pole ear.

[0043] It is worth mentioning here that the bending directions of the pole ears on both sides of the battery cell assembly 3 are different. The two groups of pole ears on the right are bent to the left, and the two groups of pole ears on the left are bent to the right. Therefore, the pole ear lever bent to the right is in contact with its right side, and vice versa. The pressing cylinder 52 drives the moving plate 53 to be pressed down, which drives the linkage rod 55 to descend, thereby driving the gear d43 to rotate through the rack 56. It is worth mentioning that the teeth of the racks 56 on both sides are arranged facing each other, driving the paper wheels d43 on both sides to rotate in opposite directions, thereby driving the bending plates 9 on both sides to bend toward the middle at the same time, bending the pole ears on both sides toward the middle.

[0044] like Figure 5 As shown, a through hole 61 is opened on the side of the accommodating groove 4, and the unloading component 13 includes a unloading cylinder 62 arranged on the upper end surface of the support frame 1, and a unloading plate 63 is arranged on the output shaft of the unloading cylinder 62. The size of the unloading plate 63 is set to be the same as the through hole 61, and a unloading belt 64 corresponding to the through hole 61 is arranged on the side of the turntable 2.

[0045] It is worth mentioning here that after the turntable 2 stops rotating, the unloading plate 63 is driven by the unloading cylinder 62 to push the welded battery cell assembly 3 onto the unloading belt 64 through the through hole 61 on the accommodating groove 4, and then collected uniformly by the unloading belt 64.

[0046] like Fig. 9 As shown, the width of the bending plate 9 is greater than the length of the tab of the battery cell 5 .

[0047] like Fig. 9 As shown, the height of the bending plate 9 is higher than the height of the shift rod 10, and the distance between the bending plate 9 and the shift rod 10 after bending is equal to the thickness of the tab.

[0048] It is worth mentioning here that by bending the bending plate 9 so that the distance between the bending plate 9 and the shift rod 10 is equal to the thickness of the pole ear, the pole ear can be in a horizontal position after the bending plate 9 is rotated to a horizontal state, which facilitates subsequent tighter pressing with the adapter sheet.

[0049] like Fig. 9 As shown, after the lever 10 is extended, it is in contact with the upper end surface of the battery cell 5 and the surface of the tab at the same time.

[0050] like Figure 4 As shown, a baffle 91 is provided on the side of the support platform 22 , and the end surface of the baffle 91 coincides with the end surface of the accommodating groove 4 .

[0051] It is worth mentioning here that by setting a baffle 91 on the side of the support platform 22, the battery cell assembly 3 stopped on the conveyor belt 21 by the baffle 91 can be exactly corresponding to the receiving groove 4, preventing the loading cylinder 23 from driving the loading plate 24 to load the battery cell assembly 3 and interfering with the receiving groove 4.

[0052] The working process is as follows:

[0053] The worker combines four battery cells 5 into a battery cell assembly 3 and places it on the conveyor belt 21. The conveyor belt 21 drives the battery cell assembly 3 to move to the baffle 91 and stop. When the turntable 2 rotates the receiving groove 4 to be opposite to the loading plate 24, the loading cylinder 23 drives the loading plate 24 to push the battery cell assembly 3 into the receiving groove 4. The turntable 2 drives the battery cell assembly 3 to move to the bending station, and the motor 8 drives the gear c38 to rotate. The gear c38 drives the gear b37 to rotate through the synchronous belt b39. The gear b37 drives the synchronous belt a36 to rotate, thereby driving the plurality of threaded rods 34 to rotate through the synchronous belt a36, driving the gear rod 10 to move to the side of the pole ear, and at the same time drives the rotating rod 42 to move through the linkage block 45, so that the bending plate 9 moves to the side of the pole ear;

[0054] The pressing cylinder 52 drives the movable plate 53 to descend while driving the linkage rod 55 to descend, and drives the gear d43 to rotate through the rack 56 on the side of the linkage rod 55, thereby driving the block 44 to drive the rotating rod 42 to rotate, so that the bending plate 9 bends the pole ears on both sides toward the middle. After the turning is completed, the battery cell assembly 3 is transferred to the welding station with the turntable 2, and the worker uses tools to place the adapter plate on top of the turned pole ear. The pressing cylinder 52 drives the movable plate 53 to continue to descend, so that the pressing plate 54 presses the pole ear and the adapter plate tightly and then welds them through the welding robot 12. After the welding is completed, the battery cell assembly 3 is transferred to the unloading station with the turntable 2, and the unloading plate 63 is driven by the unloading cylinder 62 to push it onto the unloading belt 64 to complete the unloading.

[0055] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front and back", "left and right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0056] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0057] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical prompts of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A welding device for a battery core structure, comprising a support frame (1) and a turntable (2) rotatably arranged on the support frame (1), characterized in that: The surface of the turntable (2) is provided with a plurality of receiving grooves (4) for placing the battery cell assembly (3) along its circumferential direction. The battery cell assembly (3) includes four battery cells (5). A loading assembly (6) for delivering the battery cell assembly (3) to the receiving groove (4) is provided on the side of the turntable (2). A bending assembly (7) is provided above the turntable (2) at a station below the loading assembly (6). The bending assembly (7) includes a motor (8) and a bending plate (9) and a shift lever (10) driven by the motor (8). The motor (8) drives the bending plate (9) to move to the side of the pole ear of the battery cell (5) while driving the shift lever (10). Move to the side of the pole ear, a pressing assembly (11) is arranged above the support frame (1), and during the process of pressing down, the pressing assembly (11) drives the bending plate (9) to rotate to bend the two pole ears on the left side of the battery cell assembly (3) to the right and the two pole ears on the right side to the left, and a space is reserved at the bending position of the pole ears through the shift rod (10), and during the pressing process of the pressing assembly (11), the adapter plate and the pole ear are pressed down to press the reserved space, and the pole ear and the adapter plate are laser welded by a welding robot (12) arranged on the side, and a blanking assembly (13) for blanking the battery cell assembly (3) is arranged on the support frame (1).

2. A welding device for a battery core structure according to claim 1, characterized in that: The loading assembly (6) comprises a conveying belt (21) arranged on the side of the turntable (2), the conveying belt (21) is used to transport the battery cell assembly (3), a support platform (22) is arranged on the side of the conveying belt (21), a loading cylinder (23) is arranged on the support platform (22), a loading plate (24) is arranged on the output shaft of the loading cylinder (23), and the loading cylinder (23) drives the loading plate (24) to push the battery cell assembly (3) on the conveying belt (21) into the containing groove (4).

3. A welding device for a battery core structure according to claim 1, characterized in that: The support frame (1) is provided with a placement plate (31), the placement plate (31) is provided with a plurality of slide rails (32) corresponding to the electric cell batteries (5), a slider (33) is slidably provided in the slide rail (32), a threaded rod (34) is provided on the side of the slider (33), the gear rod (10) is provided on the threaded rod (34), a gear a (35) meshing with the threaded rod (34) is rotatably provided on the end surface of the slide rail (32), a synchronous belt a (36) is sleeved between the plurality of gears a (35), a gear b (37) meshing with the synchronous belt a (36) is provided at the center of the placement plate (31), the motor (8) is provided below the placement plate (31), a gear c (38) is provided on the output shaft of the motor (8), and a synchronous belt b (39) is sleeved between the gear c (38) and the gear b (37).

4. A welding device for a battery core structure according to claim 3, characterized in that: The placement plate (31) is provided with an articulated seat (41), a rotating rod (42) is slidably provided in the articulated seat (41), a gear d (43) is rotatably provided on the end surface of the articulated seat (41), a clamping block (44) is provided on the surface of the rotating rod (42), the rotating rod (42) is clamped in the gear d (43) through the clamping block (44), the bending plate (9) is provided on the rotating rod (42), a linkage block (45) is provided between the rotating rod (42) and the shift rod (10), and the linkage block (45) is used to drive the rotating rod (42) and the shift rod (10) to move simultaneously.

5. A welding device for a battery core structure according to claim 1, characterized in that: A fixed plate (51) is arranged above the support frame (1), and the pressing assembly (11) includes a pressing cylinder (52) arranged above the fixed plate (51), a movable plate (53) is arranged on the output shaft of the pressing cylinder (52), a pressing plate (54) is arranged on the side of the movable plate (53), and the pressing plate (54) is arranged above the accommodating groove (4), a linkage rod (55) is arranged on the side of the movable plate (53), and a rack (56) is arranged on the side of the linkage rod (55). During the descent of the linkage rod (55), the rotating rod (42) is driven to rotate through the rack (56), thereby driving the bending plate (9) to rotate to bend the pole ear.

6. A welding device for a battery core structure according to claim 1, characterized in that: A through hole (61) is provided on the side of the accommodating groove (4); the unloading assembly (13) comprises an unloading cylinder (62) arranged on the upper end surface of the support frame (1); a unloading plate (63) is arranged on the output shaft of the unloading cylinder (62); the size of the unloading plate (63) is set to be the same as the through hole (61); and a unloading belt (64) corresponding to the through hole (61) is arranged on the side of the turntable (2).

7. A welding device for a battery core structure according to claim 1, characterized in that: The width of the bending plate (9) is greater than the length of the tab of the battery cell (5).

8. A welding device for a battery core structure according to claim 1, characterized in that: The height of the bending plate (9) is higher than the height of the shift rod (10), and the distance between the bending plate (9) and the shift rod (10) after being bent is equal to the thickness of the tab.

9. A welding device for a battery core structure according to claim 1, characterized in that: When the lever (10) is extended, it abuts against the upper end surface of the battery cell (5) and the surface of the tab at the same time.

10. The welding device for a battery core structure according to claim 1, characterized in that: A baffle (91) is provided on the side of the support platform (22), and the end surface of the baffle (91) coincides with the end surface of the accommodating groove (4).

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