CN219818452U - Welding fixture - Google Patents

Abstract

The utility model provides a welding fixture capable of improving production efficiency of a battery. The welding fixture comprises a base, two side plates and a cover plate, wherein the two side plates are arranged on the surface of the base and are arranged at intervals along the length direction of the base, each side plate is provided with an elastic piece, and the elastic pieces are attached to the inner sides of the side plates; the cover plate is detachably arranged on one side, away from the base, of the two side plates, a plurality of limiting holes are formed in the cover plate, and the limiting holes penetrate through the cover plate in the thickness direction of the cover plate and are arranged at intervals.

Description

Welding fixture

Technical Field

The utility model relates to the technical field of welding clamps, in particular to a welding clamp.

Background

In the existing battery, a connecting sheet is generally used for welding the poles of two adjacent battery cells so as to electrically connect the battery cells. However, at present, the electrode post and the connecting sheet of the battery core are welded by adopting a manual visual inspection positioning mode, so that production personnel are required to continuously adjust the position of the connecting sheet in the welding process, the accurate welding of the connecting sheet and the electrode post of the battery core is ensured, and the production efficiency of the battery is greatly reduced.

Disclosure of Invention

The embodiment of the utility model provides a welding fixture which can improve the production efficiency of a battery.

The utility model provides a welding fixture which comprises a base, two side plates and a cover plate, wherein the two side plates are arranged on the surface of the base and are arranged at intervals along the length direction of the base, each side plate is provided with an elastic piece, and the elastic pieces are attached to the inner sides of the side plates; the cover plate is detachably arranged on one side, away from the base, of the two side plates, a plurality of limiting holes are formed in the cover plate, and the limiting holes penetrate through the cover plate in the thickness direction of the cover plate and are arranged at intervals.

Wherein the elastic piece is foam.

The welding fixture further comprises a baffle plate, wherein the baffle plate is fixedly arranged on the surface of the base and is connected with the two side plates; the cover plate is detachably arranged on one side, away from the base, of the baffle plate.

The base is provided with a plurality of first mounting holes and a plurality of second mounting holes, the first mounting holes and the second mounting holes penetrate through the base in the thickness direction of the base, and the first mounting holes and the second mounting holes are arranged at intervals in the width direction of the base.

Each side plate is provided with a first assembly hole, and the first assembly holes are communicated with one first mounting hole; the baffle is provided with a plurality of third assembly holes which are arranged at intervals along the length direction of the welding fixture, and each third assembly hole is communicated with one second installation hole; the welding fixture further comprises a plurality of first fasteners and a plurality of second fasteners, each first fastener penetrates through one first mounting hole and stretches into one first mounting hole, and each second fastener penetrates through one second mounting hole and stretches into one third mounting hole.

Each side plate further comprises a first surface and a second surface, and the first surface and the second surface are spaced and arranged back to back along the width direction of the welding fixture; each side plate is further provided with a plurality of second assembly holes, the second assembly holes are arranged at intervals along the height direction of the welding fixture, and the openings of the second assembly holes are positioned on the first surface; the baffle plate further comprises a plurality of third mounting holes, the third mounting holes penetrate through the baffle plate along the thickness direction of the baffle plate, and each third mounting hole is communicated with one second mounting hole; the welding fixture further comprises a plurality of third fasteners, and each third fastener penetrates through one third mounting hole and stretches into one second assembly hole.

The base is further provided with a plurality of fixing holes, the fixing holes penetrate through the base along the thickness direction of the base and are arranged at intervals, and the fixing holes, the first mounting holes and the second mounting holes are arranged at intervals along the width direction of the base; the welding fixture further comprises a plurality of fixing pieces, and each fixing piece penetrates through one fixing hole.

The baffle is further provided with a plurality of heat dissipation holes, and the heat dissipation holes penetrate through the baffle in the thickness direction of the baffle and are arranged at intervals.

Each side plate further comprises a fixing part and an extending part, wherein the fixing part is arranged on the base, the fixing part is provided with the elastic piece, and the elastic piece is attached to the inner side of the fixing part; the extension part is fixedly connected to one side, far away from the base, of the fixing part, extends along the direction far away from the fixing part, and is arranged at intervals with the base along the height direction of the welding fixture.

The cover plate is further provided with two through grooves, the two through grooves and the limiting holes are arranged at intervals, and the two through grooves penetrate through the cover plate in the thickness direction of the cover plate.

The welding fixture provided by the embodiment of the utility model has the advantages of simple structure, convenience in assembly and good portability, is beneficial to improving the working efficiency of operators, and can be used for directly positioning the connecting sheet without manually and visually positioning and repeatedly adjusting the position of the connecting sheet, so that the welding deviation between the connecting sheet and the pole of the battery core can be eliminated, the poor contact between the connecting sheet and the pole of the battery core is avoided, the product quality of the battery is ensured to meet the requirements, and the operators are prevented from being injured due to carelessly starting the laser welding equipment, thereby being beneficial to eliminating the potential safety hazard in the welding operation process. On this basis, through setting up the elastic component in the inboard of curb plate, on the one hand, the elastic component can compress, can give way for the battery, and the welding jig is put into to the battery of being convenient for, and on the other hand, the clearance between battery and the curb plate can be filled to the elastic component, both can avoid curb plate scratch battery, also can guarantee the stability of assembling of battery and welding jig, further reduces the welding deviation between the utmost point post of electric core and the connection piece, guarantees that the product quality of battery is qualified.

Drawings

In order to more clearly describe the technical solution of the embodiments of the present utility model, the following description will explain the drawings required to be used by the embodiments of the present utility model.

Fig. 1 is a schematic structural view of a welding fixture according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the base of the welding fixture of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the base of FIG. 2 taken along line A-A;

FIG. 4 is a schematic view of the side plate of the welding fixture of FIG. 1;

FIG. 5 is a schematic cross-sectional view of the side panel of FIG. 4 taken along line B-B;

FIG. 6 is a schematic view of the structure of a baffle in the welding fixture of FIG. 1;

FIG. 7 is a schematic cross-sectional view of the baffle plate of FIG. 6 taken along line C-C;

FIG. 8 is a schematic view of the structure of a cover plate in the welding fixture of FIG. 1;

fig. 9 is a schematic view of the welding jig shown in fig. 1 assembled with a battery.

Detailed Description

The following description of the embodiments of the present utility model will be made with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a welding fixture 100 according to an embodiment of the utility model. For convenience of description, the length direction of the welding jig 100 is defined as an X-axis direction, the width direction of the welding jig 100 is defined as a Y-axis direction, the height direction of the welding jig 100 is defined as a Z-axis direction, and the X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other.

In this embodiment, the welding fixture 100 is used to limit the connection piece of the battery during welding, so as to facilitate welding the connection piece to the post of the battery. The welding jig 100 is detachably mounted to a holder (not shown) of a battery production apparatus (not shown). Illustratively, the welding fixture 100 is removably mounted to the anchor block by screws.

The welding jig 100 is provided with a receiving cavity 100a, and the receiving cavity 100a may be used to receive a battery. The housing chamber 100a has an opening (not shown). The opening is used to allow the battery to enter the receiving cavity 100a. The welding jig 100 includes a base 10, two side plates 20, a baffle 30, and a cover plate 40. Wherein, the base 10, the two side plates 20, the baffle 30 and the cover plate 40 enclose a receiving cavity 100a.

In the present embodiment, the base 10, the two side plates 20, and the baffle 30 constitute a main body 100b of the welding jig 100. Illustratively, the base 10, side panels 20, and baffle 30 are bakelite plates. Wherein, both the side plates 20 and the baffle 30 are fixedly installed at one side of the base 10. Along the X-axis direction, two side plates 20 are disposed at intervals on opposite sides of the base 10. The baffle 30 is connected between the two side plates 20. The cover 40 is detachably mounted to one side of the main body 100b. In other words, the cover 40 is installed at one side of the two side plates 20 and the baffle 30 away from the base 10, and is disposed opposite to the base 10. Illustratively, the cover 40 is removably mounted to the side of the two side panels 20 and the baffle 30 remote from the base 10.

Referring to fig. 2 and 3 in combination, fig. 2 is a schematic structural view of the base 10 in the welding fixture 100 shown in fig. 1, and fig. 3 is a schematic sectional structural view of the base 10 shown in fig. 2 taken along A-A. Where "cut along A-A" means a cut along a plane along A-A line, similar descriptions will be understood similarly hereinafter.

In the present embodiment, the base 10 has a substantially rectangular plate shape. The chassis 10 may include a first side 11, a second side 12, and two third sides 16. The first side portion 11 and the second side portion 12 are disposed to face each other with a gap therebetween in the width direction (Y-axis direction in the drawing) of the chassis 10. The two third side portions 16 are disposed at intervals and opposite to each other along the longitudinal direction (X-axis direction in the drawing) of the chassis 10. Two third side portions 16 are connected between the first side portion 11 and the second side portion 12.

The base 10 is provided with a plurality of first mounting holes 13, a plurality of second mounting holes 14, and a plurality of fixing holes 15. The plurality of first mounting holes 13, the plurality of second mounting holes 14, and the plurality of fixing holes 15 each penetrate the base 10 in a thickness direction (a Z-axis direction in the drawing) of the base 10, are arranged at intervals from each other, and are disposed around a periphery of the base 10. Wherein the plurality of first mounting holes 13 are located between the plurality of second mounting holes 14 and the plurality of fixing holes 15 and are disposed near the first side 11. The plurality of first mounting holes 13 are arranged at intervals along the X-axis direction. Each of the first mounting holes 13 includes a first stepped portion 131 and a first mounting portion 132, and the first mounting portion 132 is located at a top side of the first stepped portion 131 and communicates with the first stepped portion 131. Wherein the diameter of the first stepped portion 131 is larger than the diameter of the first mounting portion 132. Illustratively, there are two first mounting holes 13. Specifically, each of the first mounting holes 13 is provided at one of the third side portions 16.

The plurality of second mounting holes 14 are provided in the first side portion 11. The plurality of second mounting holes 14 are provided at intervals in the X-axis direction. In this embodiment, the structure of the second mounting hole 14 is the same as that of the first mounting hole 13, and reference is made to the above description about the first mounting hole 13, which is not repeated here. Illustratively, the second mounting holes 14 are four.

In this embodiment, the plurality of fixing holes 15 are disposed at intervals from the plurality of first mounting holes 13 and the plurality of second mounting holes 14 along the width direction (Y-axis direction in the drawing) of the base 10, and are located on one side of the plurality of first mounting holes 13 away from the plurality of second mounting holes 14. Specifically, a portion of the plurality of fixing holes 15 is provided at the second side portion 12, and another portion of the plurality of fixing holes 15 is provided at the third side portion 16. Each of the fixing holes 15 includes a second stepped portion 151 and a second mounting portion 152, and the second mounting portion 152 is located at a bottom side of the second stepped portion 151 and communicates with the second stepped portion 151. Wherein the diameter of the second stepped portion 151 is larger than the diameter of the second mounting portion 152. Illustratively, there are six fixation holes 15. Four fixing holes 15 are provided in the second side portion 12. Along the X-axis direction, four fixing holes 15 are arranged at intervals. Two fixing holes 15 are provided in the third side portion 16. Specifically, each third side portion 16 is provided with a fixing hole 15. In this embodiment, the fixing holes 15 may be used to mount screws to fix the welding jig 100 to a fixing base of the battery production apparatus.

The terms "top" and "bottom" and the like in the present utility model are used for the description of the orientation shown in fig. 1, i.e., to be "top" toward the positive direction of the Z axis and "bottom" toward the negative direction of the Z axis, and are not intended to indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Referring to fig. 4 and 5 together, fig. 4 is a schematic structural view of the side plate 20 in the welding fixture 100 shown in fig. 1, and fig. 5 is a schematic sectional structural view of the side plate 20 shown in fig. 4 taken along the line B-B.

In this embodiment, each side plate 20 is substantially L-shaped. Each side panel 20 includes a first face 21, a second face 22, a third face 28, and a fourth face 29. The first surface 21 and the second surface 22 are spaced apart and disposed opposite to each other in the width direction (Y-axis direction in the drawing) of the welding jig 100. The third surface 28 is spaced apart from and facing away from the fourth surface 29 in the Z-axis direction. The third face 28 and the fourth face 29 are connected between the first face 21 and the second face 22.

Each side plate 20 is provided with a first fitting hole 23 and a plurality of second fitting holes 24, and the plurality of second fitting holes 24 are spaced apart from the first fitting holes 23. That is, the first fitting hole 23 and the second fitting hole 24 do not interfere with each other. Specifically, the opening of the first fitting hole 23 is located on the third surface 28 of the side plate 20, and the first fitting hole 23 is recessed from the third surface 28 in the direction of the fourth surface 29. The first fitting hole 23 communicates with one first mounting hole 13 of the base 10. The plurality of second fitting holes 24 are provided at intervals in the Z-axis direction. The opening of each second fitting hole 24 is located on the first surface 21, and each second fitting hole 24 is recessed from the first surface 21 toward the second surface 22. Illustratively, the first and second mounting holes 23, 24 are threaded holes.

Each side plate 20 is further provided with an elastic member 25, and the elastic member 25 is attached to the inner side of the side plate 20. Illustratively, the elastic member 25 is foam. It can be appreciated that, because the elastic member 25 has elasticity, when the battery is placed in the welding fixture 100, on one hand, the elastic member 25 can be compressed to give way to the battery, thereby being convenient for the battery to be placed in the accommodating cavity 100a of the welding fixture 100, on the other hand, the elastic member 25 can also fill the gap between the battery and the side plate 20, so that the assembly stability of the battery and the welding fixture 100 can be ensured, the gap between two adjacent battery cores of the battery can be eliminated, the welding deviation between the pole post and the connecting piece of the battery core is reduced, and poor contact between the connecting piece and the pole post of the battery core is avoided. In addition, the elastic member 25 is disposed on the inner side of the side plate 20, so as to prevent the side plate 20 from scratching the battery during the assembly process of the battery and the welding fixture 100.

In addition, each side plate 20 may further include a fixing portion 26 and an extension portion 27. The extension portion 27 is fixedly connected to the fixing portion 26. Wherein the elastic member 25 is attached to the inner side of the fixing portion 26. The extension portion 27 is fixedly connected to an end of the fixing portion 26 away from the base 10, and extends in a direction away from the fixing portion 26. Specifically, the fixing portion 26 is fixedly mounted to the base 10 when the side plate 20 is assembled to the base 10. The extension portion 27 is provided at a distance from the base 10 in the height direction (Z-axis direction in the drawing) of the welding jig 100. It will be appreciated that by providing the extension 27 on the side plate 20, portability of the welding jig 100 can be increased, facilitating handling of the welding jig 100 by an operator, and thus contributing to an improvement in the work efficiency of the operator.

Referring to fig. 6 and 7 in combination, fig. 6 is a schematic structural view of the baffle 30 in the welding fixture 100 shown in fig. 1, and fig. 7 is a schematic sectional structural view of the baffle 30 shown in fig. 6 taken along C-C.

In this embodiment, the baffle 30 is used to limit the battery to prevent the battery from sliding out of the welding fixture 100. The baffle 30 includes a first side 34 and a second side 35, and the first side 34 and the second side 35 are spaced apart and disposed opposite to each other in the Z-axis direction. The baffle 30 is provided with a plurality of third fitting holes 31, a plurality of third mounting holes 32, and a plurality of heat dissipation holes 33. The plurality of third fitting holes 31, the plurality of third mounting holes 32, and the plurality of heat dissipation holes 33 are disposed at intervals from each other. In other words, the plurality of third fitting holes 31, the plurality of third mounting holes 32, and the plurality of heat dissipation holes 33 do not interfere with each other. Wherein, a plurality of third mounting holes 32 and a plurality of heat dissipation holes 33 each penetrate the baffle plate 30 in a thickness direction (Y-axis direction in the drawing) of the baffle plate 30.

The openings of the plurality of third fitting holes 31 are all located on the first side 34, and the plurality of third fitting holes 31 are all recessed from the first side 34 toward the second side 35. The plurality of third fitting holes 31 are provided at intervals in the X-axis direction. Each third fitting hole 31 communicates with one second mounting hole 14 of the base 10. Illustratively, the plurality of third mounting holes 31 are all threaded holes.

The plurality of third mounting holes 32 may be divided into two groups, and the two groups of third mounting holes 32 are spaced apart from each other along the X-axis direction on opposite sides of the baffle 30. Each of the third mounting holes 32 communicates with the second mounting hole 24 of one of the side plates 20. The number of third mounting holes 32 is six, for example. The number of third mounting holes 32 in each set is three. Specifically, each of the third mounting holes 32 includes a third stepped portion 321 and a third mounting portion 322. The third mounting portion 322 is located at a side of the third stepped portion 321 facing the inside of the welding jig 100, and communicates with the third stepped portion 321. Wherein the diameter of the third stepped portion 321 is larger than the diameter of the third mounting portion 322.

The plurality of heat dissipation holes 33 are spaced apart from each other at a middle position of the baffle 30 and are located between the two sets of third mounting holes 32. It can be appreciated that during the process of welding the connecting piece and the terminal of the battery core, a large amount of heat is usually released, and the heat in the welding fixture 100 is timely discharged in the external environment by arranging the plurality of heat dissipation holes 33 on the baffle 30, so that the battery is prevented from being in a high-temperature environment for a long time, and the service performance of the battery can be ensured.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a cover plate 40 in the welding fixture 100 shown in fig. 1.

In this embodiment, the cover 40 is made of acrylic material. The cover 40 is provided with a plurality of limiting holes 41 and a plurality of through grooves 42, and the plurality of limiting holes 41 and the plurality of through grooves 42 are each provided to penetrate the cover 40 in a thickness direction (a Z-axis direction in the drawing) of the cover 40 at intervals. Wherein, the limiting hole 41 is arranged at the middle position of the cover plate 40. The limiting hole 41 is used for limiting the connecting sheet. The shape of each limiting hole 41 can be determined according to the shape of the connecting piece.

In this embodiment, there are two through slots 42. Two through grooves 42 are provided at intervals on opposite sides of the cover plate 40 in the X-axis direction. The through groove 42 is used for avoiding the sheet metal part of the battery. It will be appreciated that, the battery will be fixed by the sheet metal part, and then the battery is put into the welding fixture 100, and the sheet metal part can be extended out of the welding fixture 100 by providing the through groove 42 on the cover plate 40, so that the sheet metal part can be prevented from affecting the assembly stability between the welding fixture 100 and the battery, and the universality of the welding fixture 100 can be increased, so that the welding fixture 100 can be suitable for batteries with different structures.

Referring to fig. 9, fig. 9 is a schematic diagram illustrating an assembled structure of the welding fixture 100 and the battery 200 shown in fig. 1.

Firstly, a plurality of battery cells (not shown) of the battery 200 are fixed by using a sheet metal part 220, then the battery cells are put into a main body 100b of a welding fixture 100, a cover plate 40 is mounted on the top side of the main body 100b and covers the battery 200, then a connecting sheet 210 is placed in a limit hole 41 of the cover plate 40, and then the connecting sheet 210 and a pole column of the battery cells are welded and fixed. It can be appreciated that, because the limiting hole 41 of the cover plate 40 can limit the movable space of the connecting piece 210, the connecting piece 210 is positioned, so that an operator can directly weld the connecting piece 210 and the pole of the battery cell, and does not need to manually and visually observe and position the welding position of the connecting piece 210 and the pole of the battery cell, thereby not only improving the production efficiency of the battery 200, but also eliminating the welding deviation between the connecting piece 210 and the pole of the battery cell, avoiding poor contact between the connecting piece 210 and the pole of the battery cell, and further ensuring that the product quality of the battery 200 meets the requirements. Meanwhile, in the production process, operators do not need to repeatedly adjust the position of the connecting sheet 210, and the injuries of the operators caused by carelessly starting the laser welding equipment can be avoided, so that potential safety hazards in the welding operation process can be eliminated.

Please refer to fig. 1 again. Welding fixture 100 also includes a plurality of first fasteners (not shown), a plurality of second fasteners (not shown), and a plurality of third fasteners (not shown). Specifically, each first fastening member is disposed through one of the first mounting holes 13 of the base 10 and extends into the first mounting hole 23, so that the side plate 20 is fixedly mounted to the base 10. Each second fastening member is disposed through a second mounting hole 14 of the base 10 and extends into a third mounting hole 31 of the baffle 30, so that the baffle 30 is fixedly mounted on the base 10. Each third fastener is disposed through a third mounting hole 32 of the baffle 30 and extends into a second mounting hole 24 of the side plate 20 to fix the baffle 30 to the side plate 20. For example, the first plurality of fasteners, the second plurality of fasteners, and the third plurality of fasteners may each be a screw.

In addition, the welding jig 100 may further include a plurality of fixing members (not shown). Each of the fixing members is inserted through one of the fixing holes 15 of the base 10 so that the welding jig 100 is mounted to the fixing base. Illustratively, the plurality of fasteners may each be a screw.

The welding fixture 100 provided by the embodiment of the utility model has the advantages of simple structure, convenience in assembly and good portability, and is beneficial to improving the working efficiency of operators, and on the other hand, the limiting hole 41 of the cover plate 40 can limit the movable space of the connecting sheet 210, so that the welding fixture 100 can realize the positioning of the connecting sheet 210, not only can eliminate the welding deviation between the connecting sheet 210 and the electrode post of the battery cell, but also can avoid the poor contact between the connecting sheet 210 and the electrode post of the battery cell, ensure the product quality of the battery 200 to meet the requirements, and also can avoid the injury of operators due to carelessly starting the laser welding equipment, thereby being beneficial to eliminating the potential safety hazard existing in the welding operation process.

On the basis, through setting up elastic component 25 in the inboard of curb plate 20, on the one hand, elastic component 25 can compress, can give way for the battery, and the battery of being convenient for is put into the holding chamber 100a of welding jig 100, on the other hand, elastic component 25 can fill the clearance between battery 200 and the curb plate 20, both can avoid curb plate 20 scratch battery 200 in the assembly process of battery 200 and welding jig 100, also can guarantee the assembly stability of battery 200 and welding jig 100, further reduce the welding deviation between the utmost point post of electric core and the connection piece 210, avoid connection piece 210 and the utmost point post contact failure of electric core, guarantee that the product quality of battery 200 is qualified.

The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims (10)

1. The welding fixture is characterized by comprising a base, two side plates and a cover plate, wherein the two side plates are arranged on the surface of the base and are arranged at intervals along the length direction of the base, each side plate is provided with an elastic piece, and the elastic pieces are attached to the inner sides of the side plates;

the cover plate is detachably arranged on one side, away from the base, of the two side plates, a plurality of limiting holes are formed in the cover plate, and the limiting holes penetrate through the cover plate in the thickness direction of the cover plate and are arranged at intervals.

2. The welding jig of claim 1 wherein the resilient member is foam.

3. The welding jig of claim 1 or 2, further comprising a baffle fixedly mounted to a surface of the base and connecting the two side plates;

the cover plate is detachably arranged on one side, away from the base, of the baffle plate.

4. The welding jig of claim 3, wherein the base is provided with a plurality of first mounting holes and a plurality of second mounting holes, each of the plurality of first mounting holes and the plurality of second mounting holes penetrating the base in a thickness direction of the base, the plurality of first mounting holes being spaced apart from the plurality of second mounting holes in a width direction of the base.

5. The welding jig of claim 4 wherein each of said side plates is provided with a first mounting hole, said first mounting hole communicating with one of said first mounting holes;

the baffle is provided with a plurality of third assembly holes which are arranged at intervals along the length direction of the welding fixture, and each third assembly hole is communicated with one second installation hole;

the welding fixture further comprises a plurality of first fasteners and a plurality of second fasteners, each first fastener penetrates through one first mounting hole and stretches into one first mounting hole, and each second fastener penetrates through one second mounting hole and stretches into one third mounting hole.

6. The welding jig of claim 5 wherein each of the side plates further comprises a first face and a second face spaced apart and disposed opposite each other along a width of the welding jig;

each side plate is further provided with a plurality of second assembly holes, the second assembly holes are arranged at intervals along the height direction of the welding fixture, and the openings of the second assembly holes are positioned on the first surface;

the baffle plate further comprises a plurality of third mounting holes, the third mounting holes penetrate through the baffle plate along the thickness direction of the baffle plate, and each third mounting hole is communicated with one second mounting hole;

the welding fixture further comprises a plurality of third fasteners, and each third fastener penetrates through one third mounting hole and stretches into one second assembly hole.

7. The welding jig according to claim 4, wherein the base is further provided with a plurality of fixing holes, the plurality of fixing holes penetrating the base in a thickness direction of the base and being spaced apart from each other, the plurality of fixing holes being spaced apart from the plurality of first mounting holes and the plurality of second mounting holes in a width direction of the base;

the welding fixture further comprises a plurality of fixing pieces, and each fixing piece penetrates through one fixing hole.

8. The welding jig of claim 3, wherein the baffle is further provided with a plurality of heat dissipation holes, each penetrating the baffle in a thickness direction of the baffle and being spaced apart from each other.

9. The welding jig according to claim 1 or 2, wherein each of the side plates further comprises a fixing portion and an extending portion, the fixing portion being mounted to the base, the fixing portion being provided with the elastic member, the elastic member being attached to an inner side of the fixing portion;

the extension part is fixedly connected to one side, far away from the base, of the fixing part, extends along the direction far away from the fixing part, and is arranged at intervals with the base along the height direction of the welding fixture.

10. The welding jig according to claim 1 or 2, wherein the cover plate is further provided with two through grooves, the two through grooves are arranged at intervals from the plurality of limiting holes, and the two through grooves penetrate through the cover plate in the thickness direction of the cover plate.