Sectional type soft package battery laser welding tool

Abstract

The utility model discloses a sectional type soft package battery laser welding tool, belongs to the technical field of battery processing, and aims to overcome the defect that an existing welding tool cannot be used for welding a larger battery. The welding tool comprises a base and a driving part fixed to the base, the driving part is provided with a pressing plate capable of moving up and down relative to the base, the pressing plate is provided with a pressing part, the base is provided with a movable clamp for containing a battery cell, the clamp is provided with a first welding area and a second welding area, and the clamp is provided with a first welding position and a second welding position. When the clamp is located at the first welding position, the first welding area is located under the pressing piece, and when the clamp is located at the second welding position, the second welding area is located under the pressing piece. When the welding of the tab corresponding to the first welding area on the clamp is completed, the second welding area of the clamp is moved to the position under the pressing piece, tab welding treatment can be conveniently and quickly carried out on a large battery, and the production efficiency of the battery is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery processing and relates to a segmented soft-pack battery laser welding tool. Background Art

[0002] A Chinese patent document discloses a soft-pack battery laser welding tool, with the authorization announcement number CN217019024U, which includes an outer frame with a pressure plate, which is driven by a cylinder to achieve lifting and lowering, and a plurality of mounting slots are opened on the pressure plate, each of which is connected to a clamping member; a shell installed in the outer frame, with multiple battery cells built in, the pole ears of the battery cells facing upward, and connected to the adapter plate; the mounting slot includes a through hole that runs through the pressure plate, and an elastic member is provided between the clamping member and the mounting slot, and the clamping member is provided with a through slot that matches the position of the through hole, and when the pressure plate is pressed down, the clamping member clamps the pole ear. This welding tool can only be used to weld smaller batteries, not larger batteries. Summary of the invention

[0003] The utility model proposes a segmented soft-pack battery laser welding tool to solve the problems existing in the prior art, aiming to overcome the defect that the prior welding tool cannot be used for welding larger batteries.

[0004] The utility model is achieved in this way:

[0005] A segmented soft-pack battery laser welding tool comprises a base and a driving member fixed on the base, characterized in that the driving member is provided with a pressure plate that can move up and down relative to the base, the pressure plate is provided with a clamping member, and the base is provided with a movable clamp to accommodate a battery cell, the clamp having a first welding area and a second welding area, and the clamp having a first welding position and a second welding position, so that when the clamp is in the first welding position, the first welding area is located directly below the clamping member, and when the clamp is in the second welding position, the second welding area is located directly below the clamping member.

[0006] The two ends of the base are respectively provided with a first limit block and a second limit block, so that when the clamp is in the first welding position, the first end of the clamp abuts against the first limit block, and when the clamp is in the second welding position, the second end of the clamp abuts against the second limit block.

[0007] The base includes a bottom plate and two limit plates fixed on the bottom plate. The clamp is located on the upper surface of the bottom plate and between the two limit plates. Reinforcing ribs are provided between the outer side of the limit plate and the bottom plate. Both limit plates are provided with driving members, and the two driving members are respectively connected to the two ends of the pressure plate.

[0008] One end of the limiting plate is provided with a guide surface.

[0009] The pressing plate is a wooden plate, and the thickness of the pressing plate is 25-35 mm.

[0010] The pressing plate has a laser incident port, and the diameter of the upper end of the laser incident port gradually decreases from top to bottom.

[0011] A plurality of floating pressing members are arranged on the pressing plate, and an elastic member is arranged between the pressing members and the pressing plate. The elastic force of the elastic member causes the pressing members to tend to move downward relative to the pressing plate.

[0012] The single clamping member has a sink, the diameter of which gradually decreases from top to bottom, the bottom of the sink has a plurality of welding holes, the diameter of the upper end of the welding hole gradually decreases from top to bottom, and the side wall thickness of the clamping member is 1.6 mm.

[0013] The clamping member is provided with a plurality of threaded holes and a concave cavity coaxially arranged with the threaded holes, the lower end of the elastic member is placed in the concave cavity, a guide rod is fixed on the threaded hole, the pressing plate is provided with a guide hole, and the guide rod is inserted into the guide hole.

[0014] The welding tool includes a support member abutting against the upper end of the clamp, the support member has multiple support rods, the support rods are inserted under the adapter plate of the battery, the lower surface of the support member has a first end limit block, a second end limit block and a rear limit block protruding downward, the first end limit block and the second end limit block cooperate with the two side walls of the clamp to constrain the left and right position of the support member relative to the clamp, the rear limit block cooperates with the rear end wall of the clamp, and the upper surface of the rear end of the support member has a handle groove opening upward.

[0015] The utility model provides a segmented soft-pack battery laser welding tool. When the welding of the pole ear corresponding to the first welding area on the fixture is completed, it only needs to move the second welding area of ​​the fixture to just below the clamping member, so that the pole ear welding process of larger batteries can be conveniently and quickly performed, thereby improving battery production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the welding tool when it is equipped with a battery;

[0017] Figure 2 It is a schematic diagram of the local structure of the welding tooling;

[0018] Figure 3 A schematic diagram of the first angle structure of the cooperation between the pressing plate and the pressing member;

[0019] Figure 4 A schematic diagram of the second angle structure of the cooperation between the pressing plate and the pressing member;

[0020] Figure 5It is a structural schematic diagram of the pressing plate;

[0021] Figure 6 This is a schematic diagram of the structure when the fixture is equipped with a battery;

[0022] Figure 7 is a schematic diagram of the structure of the support member;

[0023] Figure 8 Schematic diagram of the structure of the clamping piece.

[0024] Explanation of the accompanying drawings: 100, base; 110, bottom plate; 111, first limit block; 112, second limit block; 120, limit plate; 121, drive member; 122, reinforcing rib; 123, guide surface; 200, pressure plate; 210, laser incident port; 220, guide hole; 300, clamping member; 310, threaded hole; 320, concave cavity; 330, sink groove; 340, welding hole; 400, battery; 410, pole ear; 420, adapter plate; 500, support member; 510, support rod; 520, first end limit block; 530, second end limit block; 540, rear limit block; 550, handle groove; 600, clamp; 610, shell; 620, shell cover. DETAILED DESCRIPTION

[0025] The following will further describe the specific implementation of the utility model in combination with the accompanying drawings of the embodiments, so that the technical solution of the utility model is easier to understand and grasp. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0026] This embodiment provides a laser welding tool for a segmented soft-pack battery 400, such as Figure 1-8 As shown, it includes a base 100 and a driving member 121 fixed on the base 100, the driving member 121 is provided with a pressure plate 200 which can move up and down relative to the base 100, the pressure plate 200 is provided with a clamping member 300, the base 100 is provided with a movable clamp 600 to accommodate the battery cell, the clamp 600 has a first welding area and a second welding area, the clamp 600 has a first welding position and a second welding position, so that when the clamp 600 is in the first welding position, the first welding area is located directly below the clamping member 300, and when the clamp 600 is in the second welding position, the second welding area is located directly below the clamping member 300.

[0027] The driving member 121 of this embodiment is a cylinder, and the pressing plate 200 is fixedly connected to the cylinder shaft of the cylinder. The cylinder drives the pressing plate 200 to move up and down, driving the pressing member 300 to move up and down. Figure 1As shown, the fixture 600 is in the first welding position, and the first welding area of ​​the fixture 600 is located directly below the clamp 300. After the pole lug 410 of the first welding area of ​​the fixture 600 is welded, the fixture 600 is moved, and the second welding area of ​​the fixture 600 is moved to directly below the clamp 300, and the pole lug 410 of the second welding area is welded by laser. This welding tool can handle larger batteries 400, without turning the battery 400 over, and the operation is convenient and fast, and the production efficiency is high. The battery 400 welded by the welding tool of this embodiment is a 4-series and 8-parallel soft-pack battery 400 group, and the pole lugs 410 corresponding to the first welding area and the second welding area are symmetrical. In other optional embodiments, the drive member 121 can be a motor.

[0028] The battery 400 has a symmetrical structure, so a push-pull welding scheme is adopted to split the laser welding process into two welding sections. At the same time, an equidistant limiting method is adopted for the welding tooling. After the welding of the pole ear 410 of the first section of the battery 400 is completed, the push-pull fixture 600 is used to weld the pole ear 410 of the second section of the battery 400, thereby realizing the reuse of the same program and reducing the occurrence of process defects caused by program call errors.

[0029] like Figure 1 , 2 As shown, the two ends of the base 100 are respectively provided with a first stopper 111 and a second stopper 112, so that when the clamp 600 is in the first welding position, the first end of the clamp 600 abuts against the first stopper 111, and when the clamp 600 is in the second welding position, the second end of the clamp 600 abuts against the second stopper 112. In this way, the clamp 600 is conveniently placed in the first welding position and the second welding position.

[0030] like Figure 1 , 2 As shown, the base 100 includes a bottom plate 110 and two limit plates 120 fixed on the bottom plate 110, the clamp 600 is located on the upper surface of the bottom plate 110 and between the two limit plates 120, and a reinforcing rib 122 is provided between the outer side of the limit plate 120 and the bottom plate 110, and the two limit plates 120 are provided with a driving member 121, and the two driving members 121 are respectively connected to the two ends of the pressing plate 200. Each limit plate 120 corresponds to two reinforcing ribs 122, so that the limit plate 120 can support greater pressure and prevent the limit plate 120 from being deformed.

[0031] like Figure 2As shown, one end of the limit plate 120 has a guide surface 123. This makes it easier for the clamp 600 to be inserted between the two limit plates 120, thereby improving assembly efficiency. The pressing plate 200 is a wooden board, and the thickness of the pressing plate 200 is 25-35 mm. The pressing plate 200 of this embodiment is 30 mm. Compared with the 10-20 mm pressing plate 200 of the prior art, 30 mm can better prevent the pressing plate 200 from deforming and arching after being pressed down, and also avoid the pressing plate 200 being too thick and increasing costs.

[0032] like Figure 3 As shown, the pressing plate 200 has a laser incident port 210, and the upper end diameter of the laser incident port 210 gradually decreases from top to bottom. Since the laser is emitted from the welding head in a conical shape, the upper end edge of the laser incident port 210 of the pressing plate 200 is chamfered so that the upper end diameter of the laser incident port 210 gradually decreases from top to bottom, increasing the avoidance space of the upper port, reducing shading, and increasing the strength of the structure, and increasing the adjustable range of the laser welding head and the effective area of ​​laser welding.

[0033] The pressing plate 200 is provided with a plurality of floating pressing members 300, and in this embodiment, there are eight pressing members 300. An elastic member is provided between the pressing member 300 and the pressing plate 200, and the elastic force of the elastic member causes the pressing member 300 to tend to move downward relative to the pressing plate 200. The elastic member is a spring, and the shading phenomenon during the laser welding process is reduced while ensuring the flatness requirements of the tab 410 and the risk of placing a series short circuit. The pressing member 300 has a plurality of threaded holes 310 and a concave cavity 320 coaxially arranged with the threaded hole 310. One pressing member 300 has four threaded holes 310 distributed at the four corners of the pressing member 300, and the lower end of the elastic member is placed in the concave cavity 320. A guide rod is fixed on the threaded hole 310, and the pressing plate 200 has a guide hole 220, and the guide rod is inserted into the guide hole 220. The concave cavity 320 can limit the spring to prevent it from falling out. The guide rod plays a guiding and limiting role for the clamping piece 300 during the downward pressing process of the pressure plate 200. The spring can ensure that the force exerted by the clamping piece 300 on the battery 400 adapter plate 420 is not too large. Because the movement speed of the cylinder is relatively fast, the spring can buffer the downward movement of the pressure plate 200, flatten the pole ear 410 on the adapter plate 420, ensure the welding quality during laser welding, and prevent the pressure plate 200 from damaging the adapter plate 420.

[0034] like Figure 8As shown, a single pressing member 300 has a sink 330, the diameter of the sink 330 gradually decreases from top to bottom, the bottom of the sink 330 has a plurality of welding holes 340, the diameter of the upper end of the welding hole 340 gradually decreases from top to bottom, and the side wall thickness of the pressing member 300 is 1.6 mm. Compared with the side wall thickness of the pressing member 300 of the prior art of 2 mm, the thinner side wall thickness facilitates the formation of a larger gap between adjacent pressing members 300, reducing the risk of short circuit.

[0035] like Figure 1 , 6 As shown in Figures 7 and 8, the welding tooling includes a support member 500 abutting against the upper end of the clamp 600, the support member has a plurality of support rods 510, the support rods 510 are inserted under the adapter plate 420 of the battery 400, the lower surface of the support member 500 has a first end limit block 520, a second end limit block 530 and a rear limit block 540 protruding downward, the first end limit block 520 and the second end limit block 530 cooperate with the two side walls of the clamp 600 to constrain the left and right position of the support member 500 relative to the clamp 600, the rear limit block 540 cooperates with the rear end wall of the clamp 600, and the upper surface of the rear end of the support member 500 has a handle groove 550 opening upward.

[0036] The first end limit block 520 and the second end limit block 530 prevent the support member 500 from being offset to the left or right relative to the clamp 600. The rear limit block 540 is used to confirm whether the support member 500 is inserted into place. The first end limit block 520, the second end limit block 530 and the rear limit block 540 can prevent the support member 500 from being positioned inaccurately, thereby preventing the subsequent poor welding caused by inaccurate positioning.

[0037] If the pressure plate 200 is pressed down and the adapter plate 420 is deformed, the tab 410 will be difficult to be pressed, which will lead to poor subsequent welding. The force transferred to the battery cell will cause the battery cell to be deformed and damaged. The support member 500 can effectively block the pressure from the pressure plate 200, so that the pressure of the pressure plate 200 is transmitted to the clamp 600 through the adapter plate 420 and the support member 500, avoiding deformation of the adapter plate 420 and improving the welding effect. The edges of the support rod 510 are chamfered to prevent the support rod 510 from damaging the battery cell. The handle groove 550 is used on the support member 500 to eliminate the handle protruding from the rear side of the clamp 600 to avoid interference between the handle and the limit plate 120.

[0038] The clamp 600 includes a shell 610 and a shell cover 620. The shell cover 620 can be opened to take out the battery 400. Handles are provided on the left and right ends of the shell 610 to facilitate the switching of the clamp 600 between the first welding position and the second welding position. After the battery 400 is loaded into the fixture 600, the shell cover 620 is pressed and locked on the shell body 610 by the lock, the support member 500 is inserted, and the fixture 600 is inserted between the two limit plates 120, so that the fixture 600 slides on the bottom plate 110 to the first welding position or the second welding position, and the cylinder drives the pressure plate 200 to move downward. After the pressure plate 200 moves down to the position, laser welding is performed. After the welding of the pole ear 410 in the first welding area or the second welding area is completed, the cylinder drives the pressure plate 200 to move up, and then the fixture 600 is moved so that the fixture 600 moves to the second welding position or the first welding position, and the pressure plate 200 is driven down again to complete the welding of the pole ear 410 in the second welding area or the first welding area. After the welding is completed, the pressure plate 200 is moved up, the fixture 600 is taken out, and the welded battery 400 is taken out.

Claims

1. A segmented soft-pack battery laser welding tool, comprising a base (100) and a driving member (121) fixed on the base (100), characterized in that: The driving member (121) is provided with a pressing plate (200) that can move up and down relative to the base (100), the pressing plate (200) is provided with a pressing member (300), the base (100) is provided with a movable clamp (600) for accommodating the battery core, the clamp (600) having a first welding area and a second welding area, the clamp (600) having a first welding position and a second welding position, so that when the clamp (600) is in the first welding position, the first welding area is located directly below the pressing member (300), and when the clamp (600) is in the second welding position, the second welding area is located directly below the pressing member (300).

2. A segmented soft-pack battery laser welding tool according to claim 1, characterized in that: A first limit block (111) and a second limit block (112) are respectively provided at the two ends of the base (100), so that when the clamp (600) is in the first welding position, the first end of the clamp (600) abuts against the first limit block (111), and when the clamp (600) is in the second welding position, the second end of the clamp (600) abuts against the second limit block (112).

3. The laser welding tool for segmented soft-pack batteries according to claim 1, characterized in that: The base (100) comprises a bottom plate (110) and two limiting plates (120) fixed on the bottom plate (110); the clamp (600) is located on the upper surface of the bottom plate (110) and between the two limiting plates (120); reinforcing ribs (122) are provided between the outer sides of the limiting plates (120) and the bottom plate (110); driving members (121) are provided on the two limiting plates (120); and the two driving members (121) are respectively connected to the two ends of the pressing plate (200).

4. The laser welding tool for segmented soft-pack batteries according to claim 3, characterized in that: One end of the limiting plate (120) has a guide surface (123).

5. The laser welding tool for segmented soft-pack batteries according to claim 1, characterized in that: The pressing plate (200) is a wooden board, and the thickness of the pressing plate (200) is 25-35 mm.

6. The laser welding tool for segmented soft-pack batteries according to claim 1, characterized in that: The pressing plate (200) has a laser incident port (210), and the diameter of the upper end portion of the laser incident port (210) gradually decreases from top to bottom.

7. The laser welding tool for segmented soft-pack batteries according to claim 1, characterized in that: A plurality of floating pressing members (300) are provided on the pressing plate (200), and an elastic member is provided between the pressing member (300) and the pressing plate (200), wherein the elastic force of the elastic member causes the pressing member (300) to tend to move downward relative to the pressing plate (200).

8. The laser welding tool for segmented soft-pack batteries according to claim 7, characterized in that: A single pressing piece (300) has a sink (330), the diameter of which gradually decreases from top to bottom, the bottom of the sink (330) has a plurality of welding holes (340), the diameter of the upper end of the welding hole (340) gradually decreases from top to bottom, and the side wall thickness of the pressing piece (300) is 1.6 mm.

9. The laser welding tool for segmented soft-pack batteries according to claim 7, characterized in that: The clamping member (300) is provided with a plurality of threaded holes (310) and a concave cavity (320) coaxially arranged with the threaded holes (310); the lower end of the elastic member is placed in the concave cavity (320); a guide rod is fixed on the threaded hole (310); the pressing plate (200) is provided with a guide hole (220), and the guide rod is inserted into the guide hole (220).

10. A segmented soft-pack battery laser welding tool according to any one of claims 1 to 9, characterized in that: The welding tool comprises a support member (500) abutting against the upper end of the clamp (600), the support member has a plurality of support rods (510), the support rods (510) are inserted under the adapter plate (420) of the battery (400), the lower surface of the support member (500) has a first end limit block (520) protruding downward, a second end limit block (530) and a rear limit block (540), the first end limit block (520) and the second end limit block (530) cooperate with the two side walls of the clamp (600) to constrain the left and right position of the support member (500) relative to the clamp (600), the rear limit block (540) cooperates with the rear end wall of the clamp (600), and the upper surface of the rear end of the support member (500) has a handle groove (550) with an opening facing upward.

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