CN-120772645-B - Positive and negative electrode electric welding equipment for battery pack

Abstract

The invention discloses positive and negative electrode electric welding equipment of a battery pack, which relates to the technical field of tab welding and comprises a supporting table, wherein an anvil block mechanism and a rolling welding mechanism which are distributed left and right are arranged on the supporting table, the rolling welding mechanism is used for welding positive and negative electrodes of a battery and ultra-long tabs, and a rolling mechanism is arranged on the rolling welding mechanism and the anvil block mechanism together. The welding device has the advantages that through the cooperation of the anvil mechanism and the rolling mechanism, the application gap between the current collector and the ultra-long tab is reduced through large-scale rolling from the upper part and large-scale smoothing from the lower part, the phenomenon of cold welding is prevented, the welding quality is improved, the stress from the upper direction and the lower direction is more uniform, the situation of tab fracture is avoided, and through the cooperation of the lower supporting component and the lifting plate, the separation between the welded tab and the anvil stage is facilitated by utilizing the air cooling and anti-adhesion material returning modes, the deformation and tearing caused by manual intervention and stripping are avoided, the welding quality is improved, and the rejection rate is reduced.

Inventors

• YUAN ZHICHAO
• MAO YU
• Zhao Jiuzhong

Assignees

• 扬州天运电力发展有限公司

Dates

Publication Date

20260512

Application Date

20250821

Claims (5)

1. 1. The positive and negative electrode electric welding equipment of the battery pack comprises a supporting table, and is characterized in that an anvil block mechanism and a rolling welding mechanism which are distributed left and right are arranged on the supporting table, the rolling welding mechanism is used for welding positive and negative electrodes and ultra-long electrode lugs of the battery, and a rolling mechanism is also arranged on the supporting table; The anvil mechanism comprises a feeding component arranged on a supporting table, the feeding component is used for feeding and locking the left part of the ultra-long tab, a lower supporting component is arranged on the supporting table and the feeding component, the lower supporting component is used for supporting and smoothing the lower part of the ultra-long tab, a lifting plate is arranged on the supporting table, the bottom wall of the lifting plate is connected with the top wall of the supporting table through an electric push rod, the lifting plate is driven to lift up and down through the output end of the electric push rod, and the lower supporting component is matched with the lifting plate to perform air cooling and anti-adhesion material returning operation; The rolling mechanism comprises an inverted U-shaped sliding frame which is driven by an electric sliding block to be connected to the top wall of the supporting table in a left-right sliding manner, a rolling assembly is arranged on the inverted U-shaped sliding frame and is used for being matched with the lower supporting assembly to roll out ultra-long lugs in a large range simultaneously from the upper direction and the lower direction, and the rolling assembly is locally released when the rolling welding mechanism is used for welding; The feeding assembly comprises a feeding table, the horizontal section top wall of the supporting table is detachably provided with the feeding table, the feeding table consists of a concave seat fixed with the supporting table and a supporting bar fixed on the left part of the top wall of the concave seat, the front side wall and the rear side wall of the concave seat are fixed with ear seats, clamping plates are clamped above the supporting bar through a downward pressing frame in an inverted U shape, and the downward pressing frame is connected with the ear seats through pins; The lower support assembly comprises a support boss, the concave seat is connected with the support boss in a left-right sliding manner, the inside of the support boss is connected with a long cushion block and an anvil seat in a up-down sliding manner, the anvil seat and the long cushion block are overlapped up and down, the top wall of the anvil seat is consistent with the top wall of the support boss in height, and the bottom wall of the long cushion block is consistent with the bottom wall of the support boss in height; the rolling welding mechanism and the supporting table are jointly provided with a locking assembly, the locking assembly comprises a long plate, the front side wall of the rolling welding mechanism is fixedly provided with the long plate which is connected to the top wall of the vertical section of the supporting table in a sliding manner, the front part of the left side wall of the long plate is provided with a telescopic rod, and the rear side wall of the telescopic end of the telescopic rod is fixedly connected with a locking rod; The rolling assembly comprises a connecting frame with the right side wall of the horizontal section of the inverted U-shaped sliding frame fixed, a plurality of connecting rods facing front and back are uniformly distributed on the right side wall of the connecting frame, and double-end torsion spring rods are connected between the adjacent connecting rods; The movable section fixedly connected with of double-end torsion spring pole rolls the piece, rolls the piece and is kept away from the back plate and the back plate that the double-end torsion spring pole is connected and keep away from the roll that rolls that double-end torsion spring pole one side rotated and be connected and constitute, rolls the locating hole that runs through around all having seted up at roller and the back plate middle part, locating hole and locking lever looks adaptation.
2. 2. The positive and negative electrode electric welding equipment for the battery pack according to claim 1, wherein the supporting table is L-shaped, a sliding rail facing front and back is arranged on the top wall of the vertical section of the supporting table, the rolling welding mechanism is driven by the electric sliding block to reciprocate on the sliding rail front and back, and the rolling welding mechanism is used for carrying out ultrasonic rolling welding operation through the disc-shaped rolling welding head.
3. 3. The positive and negative electrode electric welding equipment of the battery pack according to claim 1, wherein the inside of the supporting boss is provided with air guide channels symmetrically left and right by taking the anvil block as a center, and the air guide channels are composed of a main channel facing front and back and branch channels uniformly communicated with the main channel, and the tops of the branch channels are obliquely close to the anvil block.
4. 4. The positive and negative electrode electric welding equipment for the battery pack according to claim 1, wherein the right side wall of the concave seat and the left side wall of the vertical section of the supporting table are connected with lifting plates in a common vertical sliding mode, and the initial top wall height of the lifting plates is consistent with the heights of the top wall of the concave seat and the top wall of the vertical section of the supporting table.
5. 5. The positive and negative electrode electric welding equipment for the battery pack according to claim 1, further comprising a reset assembly, wherein the reset assembly comprises connecting plates, the connecting plates are rotationally connected to the connecting rods on the foremost side and the rearmost side, a baffle is rotationally connected between the two connecting plates together, a motor is mounted on the rear side wall of the front vertical section of the inverted U-shaped sliding frame, and the rear side wall of the output end of the motor is connected with the connecting plates on the front side.

Description

Positive and negative electrode electric welding equipment for battery pack Technical Field The invention relates to the technical field of tab welding, in particular to positive and negative electrode electric welding equipment of a battery pack. Background The electrode lug is a key conductive part for connecting the positive electrode and the negative electrode of the battery pack with an external circuit, and is usually made of metal foil (such as nickel, aluminum and copper), one end of the electrode lug is welded on a battery current collector (positive aluminum foil/negative copper foil), the other end of the electrode lug is connected with a battery shell or an external circuit, an ultrasonic rolling welding mode is adopted for the ultra-long electrode lug at present, high-frequency vibration friction is utilized for generating heat, solid-state combination among metals is realized, the ultra-long electrode lug is fixed on an anvil block through a clamp, and pressure is applied in a rolling mode to realize continuous welding. At present, in the rolling welding process of ultra-long tabs, a gap is formed between the tab and the positive electrode and the negative electrode of a battery during welding, the gap is formed to cause the phenomenon of cold welding, the welding quality is affected, a mode of adjusting the pressure of a welding head or a mode of integrally pressing once is generally adopted to prevent the gap from being overlarge, but because the tab is a softer thin material, the pressure of the welding head is difficult to adjust, and a mode of integrally pressing once is adopted, the problem of the gap is still caused by the fact that part of the tab after the welding time is subjected to welding stress, and secondly, if the pressure of the welding head exceeds the limit of the tab, the tab is seriously broken, the tab is easily adhered to the surface of an anvil under the influence of pressure welding and local high temperature of welding, the tab is required to be manually intervened and peeled off, the welding quality is affected, and the rejection rate is increased. Therefore, in order to improve the welding quality and reduce the rejection rate, the invention provides the positive and negative electrode electric welding equipment of the battery pack. Disclosure of Invention The invention aims to solve the problems in the prior art and provides positive and negative electrode electric welding equipment of a battery pack. In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a positive negative pole electric welding equipment of group battery, includes the brace table, be provided with anvil mechanism and the roll welding mechanism that is the left and right sides and distribute on the brace table, and roll welding mechanism is used for welding positive negative pole of battery and overlength utmost point ear, still is provided with rolling mechanism. The anvil mechanism comprises a feeding component arranged on a supporting table, the feeding component is used for feeding and locking the left part of the ultra-long tab, a lower supporting component is arranged on the supporting table and the feeding component and used for supporting and smoothing the lower part of the ultra-long tab, a lifting plate is arranged on the supporting table, the bottom wall of the lifting plate is connected with the top wall of the supporting table through an electric push rod, the lifting plate drives the lifting plate to lift up and down through the output end of the electric push rod, and the lower supporting component is matched with the lifting plate to perform air cooling and anti-adhesion material returning operation. The rolling mechanism comprises an inverted U-shaped sliding frame which is driven by an electric sliding block to be left and right in sliding connection with the top wall of the supporting table, and a rolling assembly is arranged on the inverted U-shaped sliding frame and is used for carrying out large-range rolling on ultra-long lugs simultaneously in the upper and lower directions in cooperation with the lower supporting assembly, and local release is carried out when the rolling welding mechanism is used for welding. In the positive and negative electrode electric welding equipment of the battery pack, the supporting table is L-shaped, the top wall of the vertical section of the supporting table is provided with the front-back oriented sliding rail, the rolling welding mechanism is driven by the electric sliding block to reciprocate on the sliding rail, and the rolling welding mechanism is used for carrying out ultrasonic rolling welding operation through the disc-shaped rolling welding head. In the positive and negative electrode electric welding equipment of the battery pack, the feeding component comprises a feeding table, the horizontal section top wall of the supporting table is detachably provided with