Clamp for laser welding of lithium battery cover plate

Abstract

The utility model relates to a clamp for laser welding of a lithium battery cover plate. The welding device comprises a welding base, a supporting table, a clamping assembly, a pressing plate located on the upper side of the supporting table and arranged in an up-down sliding mode relative to the supporting table, and a cover plate tool. The cover plate tool comprises a tool base, a horizontal supporting face arranged on the upper side of the tool base, two movable strips elastically installed in the tool base and a plurality of positioning pins arranged on the supporting face, lower grooves are correspondingly formed in the portions, around the positioning pins, of the supporting face, a plurality of positioning grooves are formed in the upper surfaces of the movable strips, and the positioning pins are arranged in the lower grooves. And the pressing plate can press the lithium battery cover plate on the supporting surface. According to the cover plate tool, a plurality of lithium battery cover plates can be clamped and fixed at a time, and after welding is completed and the pressing plate is lifted, the movable strips can automatically bounce upwards and reset, and the lithium battery cover plates on the movable strips are ejected out of the positioning pins, so that the lithium battery cover plates on the cover plate tool can be easily shaken off, and the efficiency of replacing the lithium battery cover plates is improved.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a laser welding clamp for a lithium battery cover. Background Art

[0002] A single lithium battery usually includes a shell with an open top, a battery cell arranged in the shell cavity, and a lithium battery cover plate for blocking the open end of the shell. The lithium battery cover plate generally includes a cover plate body, two electrode seats arranged on the cover plate and relatively protruding, a through hole arranged in the middle of the cover plate, and two electrode holes arranged on the electrode seats. The electrode holes and the through hole areas need to be welded by laser welding to fix the attached metal parts. Since the above-mentioned welding operation space is small and not suitable for manual operation, existing lithium battery manufacturers are increasingly inclined to use welding robots with programmable control to replace manual labor. However, the prior art lacks a battery positioning fixture that cooperates with the welding robot, which makes it easy for welding to deviate, resulting in not only poor welding quality but also low welding efficiency. Summary of the invention

[0003] The utility model provides a fixture for laser welding of lithium battery cover plates, which solves the problem in the prior art that there is a lack of tooling fixtures for batch precise positioning of lithium battery cover plates, resulting in low welding efficiency and poor welding quality.

[0004] The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: a fixture for laser welding of lithium battery cover plates, the lithium battery cover plate comprising a cover plate body, two electrode seats arranged on the cover plate and protruding relatively, a through hole arranged in the middle of the cover plate and two electrode holes arranged on the electrode seats, the fixture comprising a welding seat, a support platform arranged on the welding seat, a clamping assembly arranged on the support platform, a pressing plate located on the upper side of the support platform and sliding up and down relative to the support platform, and a cover plate tooling, the cover plate tooling comprising a tooling seat, a horizontal supporting surface arranged on the upper side of the tooling seat, two movable bars elastically installed in the tooling seat and a plurality of positioning pins arranged on the supporting surface, lower grooves are correspondingly arranged on the supporting surface around the positioning pins, a plurality of positioning grooves are arranged on the upper surface of the movable bar, and the pressing plate can press the lithium battery cover plate on the supporting surface.

[0005] The clamping assembly in the utility model can clamp and fix the cover plate tooling on the support platform. When the clamping assembly is loosened, the cover plate tooling can be removed manually or by a robot, and the lithium battery cover plates can be placed on the cover plate tooling piece by piece manually or by a robot. At this time, the two movable bars on the cover plate tooling are in a state of protruding from the support surface under the action of elastic reset. The two movable bars are parallel to each other and spaced apart, and the maximum width is slightly smaller than the minimum spacing between the two electrode seats on the cover plate body. Each lithium battery cover plate needs to be placed on the two positioning bars of the two movable bars at the same time. The groove is made up of two electrode seats, and the two electrode seats are ensured to be located on the outside of the two movable bars. At this time, each lithium battery cover is roughly positioned, and then the cover tooling is put back on the support table and fixed in a fixed position by the clamping assembly. The pressing plate is pressed down to abut against all lithium battery cover plates, and the movable bar is pressed down simultaneously until the lithium battery cover plate abuts against the support surface. In this process, the two electrode holes on the lithium battery cover plate will be sleeved on the two positioning pins, and the two electrode seats will be lowered into the lower groove. At this time, the utility model completes the clamping and fixation of the lithium battery cover plate, and laser welding can be performed.

[0006] Furthermore, the clamping assembly includes a fixed plate fixed on the support platform, a sliding seat slidably mounted on the support platform, and a clamping cylinder. The fixed plate and the sliding seat are both provided with a plurality of clamping blocks, the clamping blocks are trapezoidal, triangular or arc-shaped, and the tooling seat is provided with a clamping groove adapted to the shape of the clamping blocks. The shape of the clamping blocks can not only enhance the clamping stability, but also play a guiding and positioning effect.

[0007] Furthermore, a concave heat dissipation groove is provided on the support surface corresponding to the position of the through hole on the cover plate body. The heat dissipation groove not only has a heat dissipation effect, but also can be used to avoid burrs because burrs are easily generated on the through hole during the stamping process, so that the lithium battery cover plate can be placed relatively stably on the support surface.

[0008] Furthermore, the pressing plate is provided with a plurality of avoidance windows facing the lithium battery cover plate, and the avoidance windows are used to make room for the laser welding operation area.

[0009] Therefore, compared with the prior art, the utility model has the following characteristics: 1. The utility model can clamp and fix multiple lithium battery cover plates at one time, and after welding is completed, after the pressure plate is lifted, the movable bar can automatically bounce up and reset, and push the lithium battery cover plate on it out of the positioning pin, so that the lithium battery cover plate on the cover plate tooling can be easily shaken off, thereby improving the efficiency of replacing the lithium battery cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 It is a structural schematic diagram of the utility model;

[0011] Attached Figure 2 It is a side view of the utility model;

[0012] Attached Figure 3 It is a top view of the utility model;

[0013] Attached Figure 4 It is a structural schematic diagram of the cover plate tooling;

[0014] Attached Figure 5 It is a structural diagram of the tooling seat;

[0015] Attached Figure 6 Yes Figure 5 Bottom view of

[0016] Attached Figure 7 It is a top view of the cover plate fixture being fixed on the support platform;

[0017] Attached Figure 8 It is a cross-sectional view of the cover tooling. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] Example 1: See Figure 1 , Figure 4 and Figure 5 A fixture for laser welding of lithium battery cover plates, the fixture comprises a welding seat 100, a support platform 110 arranged on the welding seat, a clamping assembly 200 arranged on the support platform, a pressing plate 300 located on the upper side of the support platform and slidingly arranged up and down relative to the support platform, and a cover plate tooling 400, the cover plate tooling comprises a tooling seat 410, a horizontal supporting surface 420 arranged on the upper side of the tooling seat, two movable bars 430 elastically installed in the tooling seat, and 12 positioning pins 440 arranged on the supporting surface, lower grooves 450 are correspondingly arranged on the supporting surface around the positioning pins, 6 positioning grooves 431 are arranged on the upper surface of the movable bar, the groove wall of the positioning groove is outwardly expanded, the bottom width of the positioning groove is slightly larger than the width of the lithium battery cover plate, and the pressing plate can press the lithium battery cover plate onto the supporting surface.

[0021] In this embodiment, the clamping assembly can clamp and fix the cover plate tooling on the support table. When the clamping assembly is loosened, the cover plate tooling can be removed manually or by a robot, and the lithium battery cover plates can be placed on the cover plate tooling piece by piece by manual or mechanical hands. At this time, the two movable bars on the cover plate tooling are in a protruding support surface state under the action of elastic reset. The two movable bars are parallel to each other and spaced apart, and the maximum width is slightly smaller than the minimum spacing between the two electrode seats on the cover plate body. Each lithium battery cover plate needs to be placed in the two positioning grooves of the two movable bars at the same time, and it is ensured that the two electrode seats are located on the outside of the two movable bars. At this time, each lithium battery cover plate is roughly positioned, and then the cover plate tooling is put back on the support table and fixed in a fixed position by the clamping assembly. The pressing plate is pressed down until it abuts against all lithium battery cover plates, and the movable bar is pressed down synchronously until the lithium battery cover plate abuts against the support surface. In this process, the two electrode holes on the lithium battery cover plate will be sleeved on the two positioning pins, and the two electrode seats will drop into the lower groove. At this time, this embodiment completes the clamping and fixing of the lithium battery cover plate, and laser welding can be performed.

[0022] See Figure 1 , Figure 6 and Figure 7 The clamping assembly includes a fixed plate 210 fixed on the support platform, a sliding seat 220 slidably installed on the support platform, and a clamping cylinder 230. The support platform is also provided with two guide rails 240, and the sliding seat is slidably installed on the guide rails. Two clamping blocks 250 are provided on the fixed plate and the sliding seat. The clamping blocks are trapezoidal, and a clamping groove 412 adapted to the shape of the clamping blocks is provided on the tooling seat.

[0023] See Figure 5 and Figure 8 Two mounting grooves 460 are provided on the tooling seat, and the movable bar is slidably installed in the mounting groove. Three to four springs 470 are connected between the movable bar and the bottom of the mounting groove. Two guide columns 480 are vertically arranged upward at the bottom of the mounting groove, and the movable bar is plugged into the guide columns.

[0024] See Figure 5 A concave heat dissipation groove 490 is provided on the support surface at the position of the through hole on the cover body. The heat dissipation groove not only has a heat dissipation effect, but also can be used to avoid burrs because burrs are easily generated in the through hole during the stamping process, so that the lithium battery cover can be placed relatively stably on the support surface.

[0025] See Figure 5 , ear blocks 411 are provided on both sides of the tooling seat.

[0026] See Figure 1 and Figure 2Four vertical guide rods 310 are fixed on the pressure plate, and the guide rods are slidably installed on the support platform. A bottom plate 320 is fixed to the bottom of the four guide rods. An electric cylinder 330 is vertically arranged upward at the bottom of the welding seat, and the telescopic rod of the electric cylinder is fixedly connected to the bottom plate.

[0027] See Figure 1 and Figure 3 The pressing plate is provided with a plurality of avoidance windows 301 facing the lithium battery cover plate, and the avoidance windows are used to make room for the laser welding operation area.

[0028] It is obvious to those skilled in the art that the utility model can be changed in many ways, and such changes are not considered to be out of the scope of the utility model. All such modifications obvious to those skilled in the art will be included in the scope of the claims.

Claims

1. A fixture for laser welding of a lithium battery cover, the lithium battery cover comprising a cover body, two electrode seats provided on the cover and relatively protruding, a through hole provided in the middle of the cover, and two electrode holes provided on the electrode seats, characterized in that: The clamp includes a welding seat, a support platform arranged on the welding seat, a clamping assembly arranged on the support platform, a pressure plate located on the upper side of the support platform and sliding up and down relative to the support platform, and a cover plate tooling, the cover plate tooling includes a tooling seat, a horizontal supporting surface arranged on the upper side of the tooling seat, two movable bars elastically installed in the tooling seat and a plurality of positioning pins arranged on the supporting surface, lower grooves are correspondingly provided on the supporting surface around the positioning pins, and a plurality of positioning grooves are provided on the upper surface of the movable bar, and the pressure plate can press the lithium battery cover plate onto the supporting surface.

2. The laser welding fixture for lithium battery cover according to claim 1, characterized in that: The clamping assembly includes a fixed plate fixed on the support platform, a sliding seat slidably installed on the support platform, and a clamping cylinder. The fixed plate and the sliding seat are both provided with a plurality of clamping blocks, the clamping blocks are trapezoidal, and the tooling seat is provided with clamping grooves adapted to the shape of the clamping blocks.

3. The laser welding fixture for lithium battery cover according to claim 1 or 2, characterized in that: The tooling seat is provided with two installation grooves, and the movable bar is slidably installed in the installation grooves. A plurality of springs are connected between the movable bar and the bottom of the installation groove. The bottom of the installation groove is provided with a plurality of guide columns vertically arranged upwards, and the movable bar is plugged into and matched with the guide columns.

4. The laser welding fixture for lithium battery cover according to claim 1, characterized in that: The support surface is provided with a concave heat dissipation groove at a position corresponding to the through hole on the cover plate body.

5. The laser welding fixture for lithium battery cover according to claim 3, characterized in that: Lug blocks are arranged on both sides of the tooling seat.

6. The laser welding fixture for lithium battery cover according to claim 1, characterized in that: Four vertical guide rods are fixed on the pressure plate, and the guide rods are slidably penetrated and installed on the support platform. A base plate is fixed at the bottom of the four guide rods. An electric cylinder is vertically arranged upward at the bottom of the welding seat, and the telescopic rod of the electric cylinder is fixedly connected to the base plate.

7. The laser welding fixture for lithium battery cover according to claim 6, characterized in that: The pressing plate is provided with a plurality of avoidance windows facing the lithium battery cover plate.

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