Laser welding clamp

Abstract

The utility model relates to a laser welding fixture which comprises a rectangular plate-shaped fixture main body, a plurality of groups of welding holes for laser welding are arranged on the upper surface of the fixture main body, each group of welding holes consists of a left hole and a right hole, a rib plate is arranged between the left hole and the right hole, the left hole is L-shaped or T-shaped, and the right hole is a mirror image hole of the left hole relative to the axis of the rib plate; a plurality of groups of welding hole bosses are arranged on the lower surface of the clamp main body, and each group of welding hole bosses consists of a left boss and a right boss; the left hole and the right hole correspond to the left boss and the right boss respectively, the left hole extends towards the left boss to form a through hole, and the right hole extends towards the right boss to form a through hole; a boss groove is formed between the left boss and the right boss. The electrode plate welding fixture is specially used for welding electrode plates of a sampling unit of a lithium battery module, is reasonable in structural design, and is accurately positioned by adjusting the positions of all electrode plates of the sampling unit in place at one time through a plurality of groups of welding holes in the front surface of the fixture main body and a rectangular frame on the back surface of the fixture main body, so that the efficient welding of the electrode plates is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery modules, and particularly relates to a laser welding fixture for welding a sampling unit of a lithium battery module. Background Art

[0002] The lithium battery module is a key component of the power battery pack of an electric vehicle and is very important for the safety monitoring of the electric vehicle. When the power battery pack encounters overcharging, over-discharging and other situations, the service life of each battery cell will be shortened. Sometimes, due to poor contact of the connecting wire or insecure welding of the electrode plate, the battery pack will overheat, and even thermal runaway will occur, endangering the safety of the vehicle and the occupants.

[0003] The lithium battery module monitors and manages the state of the power battery pack through a battery management system (BMS) and a sampling unit. The sampling unit of the lithium battery module generally includes a main board frame in the shape of a plate. Components such as sampling wire harnesses, electrode plates, and temperature measuring sensors are arranged on the surface of the main board frame. The electrode plates include positive electrode plates and negative electrode plates. During the manufacturing process, the connecting pieces of the sampling wire harnesses are usually welded to the electrode plates by laser welding.

[0004] At present, the general welding method for electrode plates in the manufacturing factory of the sampling unit of the lithium battery module is to directly weld them with a laser welding machine. Since there are multiple groups of electrode plates in the sampling unit, this welding method requires positioning each electrode plate one by one first and then welding. Therefore, the workload is large, the time consumption is long, the efficiency is low, and sometimes there is a phenomenon of missed welding of individual electrode plates, which brings potential risks to the product quality and the safety of the battery pack. Content of the Utility Model

[0005] The purpose of the utility model is to provide a laser welding fixture for welding the electrode plates of the sampling unit of the lithium battery module, which can position the positions of all the electrode plates of the sampling unit at one time, so as to realize the efficient welding of the electrode plates of the sampling unit.

[0006] The purpose of the utility model is realized by adopting the following technical solutions:

[0007] A laser welding fixture includes a fixture main body in the shape of a rectangular plate. A plurality of groups of welding holes for laser welding are arranged on the upper surface of the fixture main body. Each group of welding holes is composed of a left hole and a right hole.

[0008] A rib plate is arranged between the left hole and the right hole. The left hole is L-shaped or T-shaped, and the right hole is a mirror image hole of the left hole with respect to the axis of the rib plate.

[0009] A plurality of groups of welding hole bosses are arranged on the lower surface of the fixture main body. Each group of welding hole bosses is composed of a left boss and a right boss.

[0010] The left hole and the right hole respectively correspond to the left boss and the right boss, and the left hole extends towards the left boss to form a through hole, and the right hole extends towards the right boss to form a through hole; a boss groove is provided between the left boss and the right boss.

[0011] As a preferred technical solution of the present utility model, one side of the upper surface of the fixture body is provided with N groups of welding holes, and the other side is provided with N + 1 groups of welding holes.

[0012] As a preferred technical solution of the present utility model, N is equal to 3 or 4.

[0013] As a preferred technical solution of the present utility model, the welding holes, the left hole and the right hole are all set in a rectangular shape; a trapezoidal inclined surface is provided between the welding holes and the upper surface of the fixture body.

[0014] As a preferred technical solution of the present utility model, the upper surface of the rib plate is higher than the plane where the left hole and the right hole are located and lower than the upper surface of the fixture body.

[0015] As a preferred technical solution of the present utility model, a rectangular frame is provided around the lower surface of the fixture body.

[0016] As a preferred technical solution of the present utility model, the two sides of the fixture body are provided with hand-held edges extending outwards.

[0017] As a preferred technical solution of the present utility model, the fixture body is carved from wood or phenolic resin material.

[0018] The beneficial effects of the present utility model: Compared with the prior art, the present utility model is specifically used for welding the electrode sheets of the sampling unit of the lithium battery module. Its structural design is reasonable. Through the multiple groups of welding holes on the front of the fixture body and the rectangular frame on the back, all the electrode sheets of the sampling unit can be positioned at one time, and the positioning is accurate, which helps the laser welding machine to weld each electrode sheet in turn, so as to realize the efficient welding of the sampling unit of the lithium battery module and avoid the phenomenon of missed welding of the electrode sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the front view structural schematic diagram of the present utility model;

[0020] Figure 2 is Figure 1 the A-A cross-sectional structural schematic diagram of

[0021] Figure 3 is Figure 1 the rear view structural schematic diagram of

[0022] In the figure: 1. Fixture body, 2. Left hole, 3. Right hole, 4. Rib plate, 5. Left boss, 6. Right boss, 7. Rectangular frame, 8. Hand-held edge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0024] As Figures 1 to 3 shown, a laser welding fixture includes a fixture body 1 in the shape of a rectangular plate. A plurality of groups of welding holes for laser welding are provided on the upper surface of the fixture body 1. Each group of welding holes consists of a left hole 2 and a right hole 3. A rib plate 4 is provided between the left hole 2 and the right hole 3. The left hole 2 is in an L shape or a T shape, and the right hole 3 is a mirror image hole of the left hole 2 with respect to the axis of the rib plate 4. A plurality of groups of welding hole bosses are provided on the lower surface of the fixture body 1. Each group of welding hole bosses consists of a left boss 5 and a right boss 6. The left hole 2 and the right hole 3 respectively correspond to the left boss 5 and the right boss 6, and the left hole 2 extends towards the left boss 5 to form a through hole, and the right hole 3 extends towards the right boss 6 to form a through hole. A boss groove is provided between the left boss 5 and the right boss 6.

[0025] In this embodiment, N groups of welding holes are provided on one side of the upper surface of the fixture body 1, and N + 1 groups of welding holes are provided on the other side. N in this embodiment is equal to 4. The welding holes, the left hole 2 and the right hole 3 are all in a rectangular shape; a trapezoidal inclined surface is provided between the welding holes and the upper surface of the fixture body 1. The upper surface of the rib plate 4 is higher than the plane where the left hole 2 and the right hole 3 are located and lower than the upper surface of the fixture body 1; a rectangular frame 7 is provided around the lower surface of the fixture body 1; holding edges 8 extending outwards are provided on both sides of the fixture body 1. In this embodiment, the fixture body 1 is carved from wood or phenolic resin material.

[0026] The above embodiments are only limited to explaining the concept and technical features of the present utility model, and are intended to enable those skilled in the art to understand the technical solutions and implementation manners of the utility model, and shall not be used to limit the protection scope of the present utility model accordingly. Any equivalent substitution or equivalent change made according to the technical solutions of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A laser welding fixture, including a fixture main body in the shape of a rectangular plate, characterized in that: The upper surface of the fixture body is provided with multiple groups of welding holes for laser welding. Each group of welding holes consists of a left hole and a right hole. A rib plate is provided between the left hole and the right hole. The left hole is set in an L shape or a T shape, and the right hole is a mirror image hole of the left hole with respect to the axis of the rib plate. The lower surface of the fixture body is provided with multiple groups of welding hole bosses. Each group of welding hole bosses consists of a left boss and a right boss. The left hole and the right hole respectively correspond to the left boss and the right boss, and the left hole extends towards the left boss to form a through hole, and the right hole extends towards the right boss to form a through hole. A boss groove is provided between the left boss and the right boss.

2. The laser welding jig according to claim 1, characterized in that: One side of the upper surface of the fixture body is provided with N groups of welding holes, and the other side is provided with N + 1 groups of welding holes.

3. The laser welding fixture according to claim 2, wherein: The N is equal to 3 or 4.

4. The laser welding jig according to claim 1, characterized in that: The welding holes, the left hole and the right hole are all set in a rectangular shape. A trapezoidal inclined surface is provided between the welding holes and the upper surface of the fixture body.

5. The laser welding jig according to claim 1, wherein: The upper surface of the rib plate is higher than the plane where the left hole and the right hole are located and lower than the upper surface of the fixture body.

6. The laser welding fixture according to claim 1, characterized in that: A rectangular frame is provided around the lower surface of the fixture body.

7. The laser welding fixture according to claim 6, characterized in that: Both sides of the fixture body are provided with hand-held edges extending outwards.

8. The laser welding fixture according to claim 1, characterized in that: The fixture body is carved from wood or phenolic resin material.

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