Battery module laser welding tool clamp

Abstract

The utility model discloses a battery module laser welding tool clamp which comprises a bottom plate fixed on a circulation clamp through pins, and at least three modules are placed on the upper surface of the bottom plate; the positioning blocks are symmetrically fixed on the two sides of the bottom plate in the length direction; the side edge positioning strips are symmetrically fixed to the two sides of the bottom plate in the width direction and matched with the positioning blocks to limit the module. The pressing mechanisms are arranged at the upper end of the bottom plate at equal intervals, located between every two adjacent modules and used for extruding one sides of the two modules at the same time; the graduated scale is fixed on the side edge positioning strip, is arranged corresponding to the position of the module and is used for detecting the size of the extruded module; according to the battery module laser welding tool clamp, it can be guaranteed that multiple modules are accurately positioned, the chips are placed without deviation, welding accumulated errors are eliminated, and the production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery module laser welding technical field, concretely is a kind of battery module laser welding tool fixture. BACKGROUND

[0002] Current battery module laser welding can only carry out the mode of single module welding with fixture, for the module welding of the thickness thinner battery cell, welding efficiency is low, cannot maximize the advantage of automated production line, if directly increasing length on existing tooling, welding cumulative error, bar sheet placement deviation problem will appear, affect welding quality. SUMMARY

[0003] The utility model solves the technical problems to overcome the defects of prior art, provide a kind of battery module laser welding tool fixture, can ensure that multiple module positioning is accurate, bar sheet is placed without deviation, eliminates welding cumulative error, improves production efficiency, can effectively solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of battery module laser welding tool fixture, comprising:

[0005] Bottom plate is fixed on circulation fixture by dowel, and at least three modules are placed on its upper surface;

[0006] Positioning block is fixed symmetrically on the two sides of the length direction of bottom plate;

[0007] Side positioning strip is fixed symmetrically on the two sides of the width direction of bottom plate, and limit module in cooperation with the positioning block;

[0008] Pressing mechanism is arranged at the upper end of the bottom plate at equal intervals, and is located between adjacent two modules, for simultaneously extruding one side of two modules;

[0009] Caliper is fixed on the side positioning strip, and is set correspondingly to module position, for detecting the size of module after extrusion;

[0010] Bar sheet positioning plate is integrally designed, for placing at the upper end of the module after extrusion, a plurality of placing holes are formed in the bar sheet positioning plate, and bar sheet is placed in the placing hole, the number and position of bar sheet correspond to the number and position required by module.

[0011] As a preferred technical scheme of the utility model, the pressing mechanism is located at the middle position of adjacent modules.

[0012] As a preferred technical scheme of the utility model, the pressing mechanism includes a cylinder, a connecting plate and a top plate, the cylinder is fixed on the bottom plate, both sides of the cylinder are connected with the connecting plate, one side of the connecting plate is connected with the top plate, and the top plate is opposite to the middle position of the module.

[0013] As a preferred technical scheme of the utility model, the zero position on the scale corresponding to the middle module position is located at the middle position of the scale, and the zero position on the scale corresponding to the middle module position at both ends is located at the outer end of the scale.

[0014] As a preferred technical scheme of the utility model, the output force of the cylinder is 50KG.

[0015] Compared with the prior art, the utility model has the beneficial effects that: the battery module laser welding tool clamp is reasonable in design, the module is pressed to the designed size through the pressing mechanism, the relative position of at least three modules is fixed, the cumulative error of welding is eliminated, the same clamp and multiple module welding are realized, and the production efficiency is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view after module positioning.

[0017] Figure 2 It is a structure schematic view of the utility model.

[0018] Figure 3 It is a structure schematic view of the baffle positioning plate.

[0019] In the drawing: 1 bottom plate, 2 positioning block, 3 side edge positioning strip, 4 scale, 5 pressing mechanism, 51 cylinder, 52 connecting plate, 53 top plate, 6 baffle positioning plate, 7 baffle, 8 module, 9 placing hole. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments (for the convenience of description and understanding, the following is described from the top to the bottom). Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model. Figure 1

[0021] Please refer to Figures 1-3 The utility model provides a technical scheme: a battery module laser welding tool clamp, including bottom plate 1, positioning block 2, side edge positioning strip 3, pressing mechanism 5, scale 4 and baffle positioning plate 6.

[0022] ​The base plate 1 is fixed to the transfer fixture by pins, the positioning block 2 is fixed on both sides of the base plate 1 in the length direction, and the side positioning strip 3 is fixed on both sides of the base plate 1 in the width direction to limit the peripheral positioning of the module 8. The following example is three modules 8 placed on the base plate 1.

[0023] The pressing mechanism 5 includes a cylinder 51, a connecting plate 52, and a top plate 53. The cylinder 51 is fixed on the base plate 1. The output ends on both sides of the cylinder 51 are connected to the connecting plate 52. One side of the connecting plate 52 is connected to the top plate 53. The top plate 53 is directly facing the middle of the module 8. The cylinder 51 extends synchronously from both sides to press and position two adjacent modules. The output force of the cylinder 51 meets the requirement of 50KG.

[0024] The bar tablet positioning plate 6 is an integrated design and is placed on the top of the module 8 after the module 8 is extruded. The bar tablet positioning plate 6 is provided with multiple placement holes 9, and bar tablets 7 are placed in the placement holes 9. The number and position of the bar tablets 7 correspond to the required number and position of the module 8, ensuring that the center hole of the pole post and the center hole of the bar tablet are aligned. The error between the two in the width direction of the module 8 is ±0.3mm, and the error in the length direction of the module 8 is ±0.5mm.

[0025] Furthermore, in order to ensure the consistency of the welding position of module 8, that is, to fix the relative position of module 8, a scale 4 is installed on the side positioning strip 3 to check the size of module 8 after extrusion. If any abnormality is found, the consistency of the incoming module is checked in time and adjustments are made.

[0026] Furthermore, in order to facilitate the centering and pressing of modules 8 at different positions, the zero position on the scale 4 corresponding to the middle module position is located at the middle position of the scale 4, and the zero position on the scale 4 corresponding to the middle module positions at both ends is located at the outer end of the scale 4.

[0027] To ensure that the relative positions of modules 8 are fixed, the clamping mechanism 5 is located in the middle of adjacent modules 8.

[0028] In use: Place the three modules on the left, center, and right positions on the base plate, and determine the placement position according to the scale. Through the bidirectional synchronous action of the cylinders 51 in the two pressing mechanisms 5, apply a 50KG constraint force to the three modules 8 simultaneously, compressing the center position to correspond to the zero position of the scale 4 of the module 8. The zero position of the scale 4 at both ends is at the outer end, and the zero position of the scale 4 in the middle is at the middle position. After the module 8 is compressed to the design value, place the pad positioning plate 6 so that the center hole of the pad and the center hole of the battery terminal are aligned, which is convenient for welding.

[0029] After the three modules 8 are extruded, the error does not accumulate. The error of a single module 8 is ±0.5mm. The welding reference point is the relative position of the two end modules 8. The welding error of the bar sheet 7 can be controlled within ±0.5mm, avoiding abnormal problems such as insufficient welding tension, false welding, and broken welding.

[0030] This invention uses a clamping mechanism to compress the modules to the designed size, ensuring that the relative positions of the three modules are fixed, eliminating cumulative welding errors, and realizing welding of "multiple modules with the same fixture", thereby increasing production efficiency by 20%.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser welding fixture for battery modules, characterized in that: include: The base plate (1) is fixed to the transfer fixture by pins, and at least three modules (8) are placed on its upper surface; Positioning blocks (2) are symmetrically fixed on both sides of the base plate (1) along its length. Side positioning strips (3) are symmetrically fixed on both sides of the base plate (1) in the width direction, and cooperate with the positioning block (2) to limit the module (8); The pressing mechanism (5) is equally spaced on the upper end of the base plate (1) and located between two adjacent modules (8) for simultaneously pressing one side of the two modules (8). A scale (4) is fixed on the side positioning strip (3) and is set at the position corresponding to the module (8) to detect the size of the extruded module (8); The bar slice positioning plate (6) is an integral design and is used to place the bar slices (7) on the upper end of the module (8) after the module (8) is extruded. The bar slice positioning plate (6) is provided with multiple placement holes (9), and bar slices (7) are placed in the placement holes (9). The number and position of the bar slices (7) correspond to the required number and position of the module (8).

2. The laser welding fixture for battery modules according to claim 1, characterized in that: The clamping mechanism (5) is located in the middle of the adjacent module (8).

3. A laser welding fixture for battery modules according to claim 1 or 2, characterized in that: The pressing mechanism (5) includes a cylinder (51), a connecting plate (52) and a top plate (53). The cylinder (51) is fixed on the base plate (1). The two output ends of the cylinder (51) are connected to the connecting plate (52). One side of the connecting plate (52) is connected to the top plate (53). The top plate (53) is directly opposite the middle position of the module (8).

4. The laser welding fixture for battery modules according to claim 1, characterized in that: The zero position on the scale (4) corresponding to the position of the middle module is located in the middle of the scale (4), and the zero position on the scale (4) corresponding to the positions of the middle modules at both ends is located at the outer end of the scale (4).

5. A laser welding fixture for battery modules according to claim 3, characterized in that: The cylinder (51) has an output force of 50KG.

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