Welding fixture

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a welding fixture. The welding fixture comprises a bottom plate, a first positioning piece and a second positioning piece. A first sliding groove is formed in the bottom plate in the first direction, a second sliding groove is formed in the bottom plate in the second direction, and the first direction is perpendicular to the second direction. The first positioning piece is adjustably arranged in the first sliding groove in the first direction, and the first positioning piece is configured to position a pin connected with the top cover. The second positioning piece is adjustably arranged in the second sliding groove in the second direction, and the second positioning piece is configured to fix the battery cell. Through the arrangement of the bottom plate, the first positioning piece and the second positioning piece, the pin and the battery cell can be positioned at the same time, so that the relative position deviation of the battery cell and the pin is avoided, the welding stability and reliability of the battery cell current collector and the pin are improved, the welding over-current area is increased, the bad phenomenon of pseudo soldering is reduced, the product yield is improved, and the production cost is reduced. The cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a welding fixture. Background Art

[0002] During the manufacturing process of the battery, the current collector of the battery cell needs to be connected to the top cover through pin welding to achieve current transmission. During the welding process of the current collector and pin of the battery cell, the battery cell and the pin need to be positioned at the same time to ensure that the relative position of the battery cell and the top cover is fixed to improve the reliability of welding.

[0003] However, there is no suitable welding fixture in the prior art to simultaneously fix the cell current collector and the pins, which can easily cause the relative position of the cell and the top cover to shift during the welding process, thereby causing a cold weld between the cell current collector and the pins, reducing the flow area between the cell current collector and the pins, and reducing the product yield.

[0004] Therefore, it is urgent to design a welding fixture to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a welding fixture, which can simultaneously realize the positioning of the current collector and the pin of the battery cell, avoid the phenomenon of cold welding, increase the flow area, and improve the product yield.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a welding fixture, comprising:

[0008] A bottom plate, wherein a first slide groove is provided on the bottom plate along a first direction, and a second slide groove is provided on the bottom plate along a second direction, wherein the first direction and the second direction are perpendicular to each other;

[0009] A first positioning member, the first positioning member is adjustably disposed in the first sliding groove along a first direction, and the first positioning member is configured to position a pin connected to the top cover;

[0010] A second positioning member is arranged in the second slide groove in an adjustable manner along a second direction, and the second positioning member is configured to fix the battery cell.

[0011] As an optional technical solution for welding fixtures,

[0012] The end of the first positioning member passing through the first sliding slot and the end of the second positioning member passing through the second sliding slot are both provided with locking members, and the locking members can adjust the position of the first positioning member or the second positioning member on the bottom plate.

[0013] As an optional technical solution for a welding fixture, the locking member includes a bolt, and the bolt includes a stud and a nut. One end of the stud is connected to the first positioning member or the second positioning member, and the other end of the stud is threadedly connected to the nut.

[0014] As an optional technical solution for a welding fixture, the first slide groove and the second slide groove are both provided in two numbers, and each of the first slide grooves is provided with at least one of the first positioning members, and each of the second slide grooves is provided with at least two of the second positioning members.

[0015] As an optional technical solution for a welding fixture, the two first slide grooves are arranged in a collinear manner, and the two second slide grooves are arranged in parallel.

[0016] As an optional technical solution for a welding fixture, a feed opening is also provided on the bottom plate.

[0017] As an optional technical solution for a welding fixture, the number of the feed openings is two, and the two feed openings are arranged opposite to each other along the second direction.

[0018] As an optional technical solution for a welding fixture, a folding portion is provided on one side of the bottom plate close to the top cover, the folding portion is perpendicular to the bottom plate, a groove is provided on the folding portion, and the groove is configured to accommodate the pole on the top cover.

[0019] As an optional technical solution of a welding fixture, the number of the folding parts is two, and the two folding parts are located on the same side of the bottom plate, and the two folding parts are symmetrically arranged relative to the bottom plate along the axis of the second direction.

[0020] As an optional technical solution for a welding fixture, the bottom plate and the folded portion are both metal parts with Teflon coated on the surface, or the bottom plate and the folded portion are both non-metal parts.

[0021] The beneficial effects of the utility model include at least:

[0022] The utility model provides a welding fixture, which includes a base plate, a first positioning member and a second positioning member. A first slide groove is provided on the upper side of the base plate in the first direction, and a second slide groove is provided on the upper side of the base plate in the second direction, and the first direction and the second direction are perpendicular to each other. The first positioning member is adjustably arranged in the first slide groove, and the first positioning member is configured to position a pin connected to a top cover. The second positioning member is adjustably arranged in the second slide groove, and the second positioning member is configured to fix a battery cell. The welding fixture in the utility model can simultaneously realize the positioning of the pin and the battery cell through the arrangement of the base plate, the first positioning member and the second positioning member, thereby avoiding the relative position of the battery cell and the pin from being offset, improving the stability and reliability of the welding between the battery cell collector and the pin, increasing the flow area of ​​the welding, reducing the undesirable phenomenon of cold welding, improving the product yield, and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the battery cell, top cover and welding fixture provided by the utility model after assembly;

[0025] Figure 2 An exploded view of the battery cell, top cover and welding fixture provided by the utility model;

[0026] Figure 3 A schematic diagram of the structure of the welding fixture provided by the utility model;

[0027] Figure 4 A schematic diagram of the structure of the second positioning member provided by the utility model;

[0028] Figure 5 A bottom view of the welding fixture provided by the utility model;

[0029] Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0030] Reference numerals

[0031] 10. Top cover; 11. Pole; 20. Pin; 30. Cell; 31. Current collector; 32. Welding area;

[0032] 100, bottom plate; 110, first slide groove; 120, second slide groove; 130, feed opening; 200, first positioning member; 300, second positioning member; 400, locking member; 410, stud; 420, nut; 500, folding portion; 510, groove. DETAILED DESCRIPTION

[0033] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] In the description of this embodiment, unless otherwise specified, the term "plurality" refers to a quantity of two or more than two.

[0038] Embodiment 1

[0039] This embodiment provides a welding fixture, which can simultaneously realize the positioning of the current collector and the top cover pins of the battery cell, avoid the phenomenon of cold welding, increase the flow area, improve the product yield, and save costs.

[0040] like Figure 1-Figure 3 As shown, the welding fixture mainly includes a base plate 100, a first positioning member 200 and a second positioning member 300. A first slide groove 110 is provided on the base plate 100 along the first direction, and a second slide groove 120 is provided on the base plate 100 along the second direction, and the first direction and the second direction are perpendicular to each other. The first positioning member 200 is adjustably arranged in the first slide groove 110 along the first direction, and the first positioning member 200 is configured to position the pin 20 connected to the top cover 10. The second positioning member 300 is adjustably arranged in the second slide groove 120 along the second direction, and the second positioning member 300 is configured to fix the battery cell 30. It should be noted that the first direction in this embodiment is Figure 3 The X-axis direction in the second direction is Figure 3 The Y-axis direction.

[0041] Based on the above design, the top cover 10 in this embodiment is welded to the pin 20, and a pin 20 is respectively provided on both sides of the top cover 10, the two pins 20 are arranged opposite to each other, and the two pins 20 respectively correspond to the two current collectors 31 on the battery cell 30, and can form a welding area 32 for the operator to perform welding, thereby realizing the electrical connection between the current collector 31 of the battery cell 30 and the top cover 10, which facilitates the transmission of current in the battery cell 30.

[0042] In this embodiment, the first positioning member 200 is provided to achieve the positioning effect on the pin 20, and the position of the first positioning member 200 in the first slide groove 110 can be flexibly adjusted according to the thickness and position of the pin 20, thereby improving flexibility and adaptability. The second positioning member 300 is provided to achieve the positioning effect on the battery cell 30, and the position of the second positioning member 300 in the second slide groove 120 can be flexibly adjusted according to the size of the battery cell 30, thereby enabling the welding fixture to adapt to different types of battery cells 30, thereby improving flexibility and applicability.

[0043] Compared with the prior art, the welding fixture in this embodiment can simultaneously realize the positioning of the pin 20 and the battery cell 30 through the arrangement of the bottom plate 100, the first positioning member 200 and the second positioning member 300, thereby avoiding the relative position of the battery cell 30 and the pin 20 from being offset, improving the stability and reliability of the welding between the collector 31 of the battery cell 30 and the pin 20, increasing the welding flow area, reducing the undesirable phenomenon of cold welding, improving the product yield, and saving costs. At the same time, it can also improve the assembly effect of the top cover 10 and the aluminum shell after the battery cell 30 is put into the shell, reduce the assembly gap between the top cover 10 and the aluminum shell, and improve the welding yield around the aluminum shell.

[0044] Optionally, the base plate 100 in this embodiment may be integrally formed, or may be a plurality of parts connected by splicing or welding.

[0045] like Figure 3-Figure 6 As shown, in this embodiment, a locking member 400 is provided at the end of the first positioning member 200 passing through the first slide groove 110 and the end of the second positioning member 300 passing through the second slide groove 120. The locking member 400 can adjust the position of the first positioning member 200 or the second positioning member 300 on the base plate 100.

[0046] Specifically, when it is necessary to adjust the positions of the first positioning member 200 and the second positioning member 300, the operator can release the locking state of the locking member 400 and the base plate 100, and then adaptively adjust the actual positions of the first positioning member 200 and the second positioning member 300, and then put the locking member 400 and the base plate 100 in a locked state, so that the first positioning member 200 can position the pin 20, and the second positioning member 300 can position the battery cell 30.

[0047] Furthermore, the locking member 400 in this embodiment can be set as a bolt, specifically, the bolt includes a nut 420 and a stud 410, one end of the stud 410 is connected to the first positioning member 200 or the second positioning member 300, and the other end of the stud 410 is screwed to the nut 420, and the screw connection is a threaded connection. The bottom of each first positioning member 200 and the bottom of each second positioning member 300 are each independently equipped with a locking member 400, and the two locking members 400 do not interfere with each other. And the stud 410 can pass through the first slide groove 110 and the second slide groove 120, which is convenient for adjusting the actual position of the first positioning member 200 and the second positioning member 300.

[0048] Specifically, the bolt in this embodiment includes a nut 420 and a stud 410, one end of the stud 410 is connected to the first positioning member 200 or the second positioning member 300, for example, one end of the stud 410 and the first positioning member 200 or the second positioning member 300 can be welded, or can be integrally formed, or can be threaded to achieve a detachable function. The other end of the stud 410 is threaded with the nut 420. In actual operation, the operator inserts the stud 410 into the first slide groove 110, and then places the nut 420 under the base plate 100, and by screwing the nut 420, the nut 420 is pressed against the lower end surface of the base plate 100, thereby achieving the assembly of the first positioning member 200. When it is necessary to adjust the position of the first positioning member 200, the operator can loosen the nut 420 and then move the stud 410 in the first slide groove 110. When the stud 410 and the first positioning member 200 are moved to the appropriate position, the nut 420 is screwed onto the stud 410, so that the locking member 400 and the base plate 100 are in a locked state, thereby achieving the effect of adjustable position of the first positioning member 200.

[0049] It should be noted that the first positioning member 200 and the second positioning member 300 in this embodiment have the same structure, so as to facilitate mass production and save costs.

[0050] like Figure 3 As shown, in this embodiment, the first slide groove 110 and the second slide groove 120 are both provided with two, and at least one first positioning member 200 is provided in each first slide groove 110, and at least two second positioning members 300 are provided in each second slide groove 120. The two first slide grooves 110 are arranged in a collinear manner, specifically, the two first slide grooves 110 are in the same straight line along the first direction, so that the first positioning member 200 in the first slide groove 110 can position the pin 20 easily; the two second slide grooves 120 are arranged in parallel.

[0051] The two first chutes 110 in this embodiment are respectively located on both sides of the two second chutes 120, and the two first chutes 110 are symmetrically arranged relative to the axis of the bottom plate 100 along the second direction, and the two second chutes 120 are symmetrically arranged relative to the axis of the bottom plate 100 along the second direction, so as to improve the stability and reliability of positioning the pins 20 and the battery cells 30. Exemplarily, in this embodiment, two first positioning members 200 may be arranged in each first chute 110 to improve the stability of positioning the pins 20 and avoid the phenomenon of pin 20 shifting during welding; two second positioning members 300 may be arranged in each second chute 120 to improve the stability of positioning the battery cells 30 and avoid the phenomenon of battery cells 30 shifting during welding.

[0052] Optionally, the bottom plate 100, the first positioning member 200 and the second positioning member 300 in this embodiment are all made of metal, such as stainless steel, so as to improve the mechanical strength of the welding fixture and extend the service life. In addition, the surface of the metal material is also plated with Teflon to improve safety performance.

[0053] like Figure 3 As shown, in this embodiment, a feed opening 130 is also provided on the bottom plate 100. Optionally, two feed openings 130 are provided in this embodiment, and the two feed openings 130 are symmetrically arranged relative to the axis of the bottom plate 100. Specifically, the two feed openings 130 are arranged opposite to each other along the second direction. The setting of the feed opening 130 facilitates the removal of the battery cell 30, thereby improving the working efficiency and saving costs. It is understandable that the operator can extend the gripping part of the manipulator into the two feed openings 130 to achieve the transfer of the battery cell 30.

[0054] Embodiment 2

[0055] like Figure 3 As shown, this embodiment provides a welding fixture, which is mainly different from the first embodiment in that: a folding portion 500 is provided on one side of the bottom plate 100 close to the top cover 10 in this embodiment, the folding portion 500 is perpendicular to the bottom plate 100, and the folding portion 500 is located above the bottom plate 100. A groove 510 is provided on the folding portion 500, and the groove 510 is configured to accommodate the pole 11 on the top cover 10, so as to achieve the avoidance effect on the pole 11 and avoid the interference between the pole 11 and the folding portion 500. The groove 510 in this embodiment can also play a certain protective role on the pole 11, reduce or avoid the risk of damage to the pole 11 by foreign matter such as metal chips during the welding process of the pin 20 and the current collector 31, and improve safety.

[0056] Furthermore, in this embodiment, there are two folding portions 500, and the two folding portions 500 are located on the same side of the bottom plate 100, and the two folding portions 500 are symmetrically arranged relative to the axis of the bottom plate 100. Specifically, the two folding portions 500 are symmetrically arranged relative to the axis of the bottom plate 100 along the second direction, so that the two grooves 510 can be used to accommodate the positive electrode column and the negative electrode column on the top cover 10, respectively.

[0057] Optionally, the folding portion 500 in this embodiment is a metal piece with Teflon coated on the surface, for example, it can be made of stainless steel, and the stainless steel surface is coated with Teflon to improve safety performance. The folding portion 500 and the bottom plate 100 can be welded or integrally formed.

[0058] Optionally, the bottom plate 100 and the folding portion 500 are both non-metallic parts, for example, made of engineering plastics, which saves costs and makes the welding fixture lightweight.

[0059] The remaining structures of the welding fixture in this embodiment are the same as those in the first embodiment and will not be described in detail here.

[0060] Obviously, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0061] Note that in the description of this specification, the reference terms "some embodiments", "other embodiments", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A welding fixture, used for welding a current collector (31) of a battery cell (30) and a pin (20) of a top cover (10), characterized in that: include: A bottom plate (100), wherein a first slide groove (110) is provided on the bottom plate (100) along a first direction, and a second slide groove (120) is provided on the bottom plate (100) along a second direction, wherein the first direction and the second direction are perpendicular to each other; A first positioning member (200), the first positioning member (200) being arranged in the first sliding groove (110) in an adjustable manner along the first direction, and the first positioning member (200) being configured to position a pin (20) connected to the top cover (10); A second positioning member (300), the second positioning member (300) is arranged in the second slide groove (120) in an adjustable manner along the second direction, and the second positioning member (300) is configured to fix the battery cell (30).

2. The welding fixture according to claim 1, characterized in that: The end of the first positioning member (200) passing through the first slide groove (110) and the end of the second positioning member (300) passing through the second slide groove (120) are both provided with locking members (400), and the locking members (400) are capable of adjusting the position of the first positioning member (200) or the second positioning member (300) on the base plate (100).

3. The welding fixture according to claim 2, characterized in that: The locking member (400) comprises a bolt, and the bolt comprises a stud (410) and a nut (420), one end of the stud (410) is connected to the first positioning member (200) or the second positioning member (300), and the other end of the stud (410) is threadedly connected to the nut (420).

4. The welding fixture according to claim 1, characterized in that: The first slide groove (110) and the second slide groove (120) are both provided in two numbers, and each of the first slide grooves (110) is provided with at least one of the first positioning members (200), and each of the second slide grooves (120) is provided with at least two of the second positioning members (300).

5. The welding fixture according to claim 4, characterized in that: The two first sliding grooves (110) are arranged in a collinear manner, and the two second sliding grooves (120) are arranged in parallel.

6. The welding fixture according to claim 1, characterized in that: The bottom plate (100) is also provided with a material discharge port (130).

7. The welding fixture according to claim 6, characterized in that: The number of the material discharge openings (130) is two, and the two material discharge openings (130) are arranged opposite to each other along the second direction.

8. The welding fixture according to claim 1, characterized in that: A folding portion (500) is provided on one side of the bottom plate (100) close to the top cover (10), the folding portion (500) and the bottom plate (100) being perpendicular to each other, and a groove (510) is provided on the folding portion (500), and the groove (510) is configured to accommodate a pole (11) on the top cover (10).

9. The welding fixture according to claim 8, characterized in that: The number of the folding portions (500) is two, and the two folding portions (500) are located on the same side of the bottom plate (100), and the two folding portions (500) are symmetrically arranged relative to the bottom plate (100) along the axis of the second direction.

10. The welding fixture according to claim 8, characterized in that: The bottom plate (100) and the folding portion (500) are both metal parts with Teflon coated on the surface, or the bottom plate (100) and the folding portion (500) are both non-metal parts.

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