Battery cell and chip welding tool

Abstract

The utility model discloses a battery cell and chip welding tool, and relates to the technical field of battery production and manufacturing equipment. The welding tool comprises a battery cell clamp, a limiting carrying table and a base. The battery cell clamp comprises a floating bottom plate, an upper fixing part, a stand column and a plurality of first telescopic columns, the stand column and the first telescopic columns are all arranged on the base, the floating bottom plate is arranged at the upper ends of the first telescopic columns, the upper fixing part is arranged at the upper end of the stand column, and the upper fixing part and the floating bottom plate are matched to clamp a battery cell; the floating bottom plate moves up and down through the first telescopic column so as to be matched with the upper fixing piece to adapt to battery cells with different sizes and specifications; the limiting platform deck is used for limiting and arranging the bar piece, and the limiting platform deck is movably and adjustably arranged on the base. According to the battery cell and chip welding tool, the battery cell clamp and the limiting carrying table can be movably adjusted so as to adapt to the battery cells of different specifications and sizes, and the purpose that one welding tool is used for meeting the welding and clamping requirements of the battery cells of different specifications and sizes and the chip is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production and manufacturing equipment technical field especially relates to a kind of welding tool of battery cell and bar sheet. BACKGROUND

[0002] Battery cell needs to pass through strict electric performance test to be able to go on road, so it needs to test the voltage, internal resistance, charge-discharge capacity and DCR of battery cell, currently, it is generally welded together by battery cell positive and negative pole and bar sheet, then relevant test is carried out.But, due to the variety of battery cell model, and the appearance size of different model battery cell is not same, and pole height is not same, it leads to when welding battery cell and bar sheet, for different model battery cell, technician needs to do corresponding specification size welding tool to adapt, high cost, and it is troublesome to change type and prone to error. SUMMARY

[0003] The utility model provides a kind of welding tool of battery cell and bar sheet, battery cell clamp and limit support can be adjusted to adapt to battery cell of different specification size, the purpose of realizing the welding clamping needs of battery cell and bar sheet of different specification size by one welding tool is used to solve the above technical problem.

[0004] The technical scheme for solving the above problems of the utility model is: provide a kind of welding tool of battery cell and bar sheet, the welding tool of battery cell and bar sheet includes battery cell clamp, limit support, pedestal, the battery cell clamp includes floating bottom plate, upper fixed part, stand, a plurality of first telescopic columns, the stand and a plurality of first telescopic columns are all set on pedestal, the floating bottom plate is set on the upper end of a plurality of first telescopic columns, the upper fixed part is set on the upper end of stand, the upper fixed part and floating bottom plate are used to clamp battery cell in upper and lower cooperation, the floating bottom plate is up and down movable by first telescopic column to cooperate upper fixed part to adapt to battery cell of different size specification;The limit support is used for limiting the setting bar sheet, the limit support is movably adjusted and set on pedestal, the limit support is adjusted to make the end of the bar sheet limited to extend and fit to the upper end surface of battery cell of different size specification by movable adjustment.

[0005] Further, the pedestal is equipped with movable adjustment assembly, and the movable adjustment assembly is used for adjusting the position of the limit support;The movable adjustment assembly includes vertical plate and vertical adjusting plate, the vertical plate is fixedly installed on the pedestal, a first slot-shaped mounting hole is vertically formed in the vertical adjusting plate, a first adjusting bolt is arranged in the first slot-shaped mounting hole, the first adjusting bolt is threadedly connected with the vertical plate by penetrating the first slot-shaped mounting hole, to movably adjust and install the vertical adjusting plate on the vertical plate, and the vertical adjusting plate is vertically movable, to adjust the position of the limit support in the height direction.

[0006] Further, the activity adjusting assembly further comprises a horizontal adjusting plate, the horizontal adjusting plate comprises a first plate body unit, a second plate body unit and a third plate body unit, and each of the first plate body unit, the second plate body unit and the third plate body unit is provided with a limiting platform; each end of the first plate body unit is provided with a second strip-shaped mounting hole, and a second adjusting bolt is arranged in the second strip-shaped mounting hole, the second adjusting bolt passes through the second strip-shaped mounting hole and is threadedly connected with the first plate body unit, so that the second plate body unit or the third plate body unit is movably and adjustably mounted to the end of the first plate body unit, and the second plate body unit or the third plate body unit moves relative to the first plate body unit, so that the position of the limiting platform on the second plate body unit or the third plate body unit is adjusted in the horizontal plane.

[0007] Further, the second plate body unit and the third plate body unit are arranged oppositely, and the extension direction of the second strip-shaped mounting hole is the direction in which the second plate body unit moves away from or approaches the battery cell.

[0008] Further, the limiting platform is provided with a limiting groove for accommodating and limiting the baffle, one side of the limiting groove is provided with a gap for the baffle to extend outward, and the directions of the gaps of the limiting grooves of the limiting platforms on the first plate body unit, the second plate body unit and the third plate body unit are different.

[0009] Further, the limiting platform comprises a first platform and a second platform, the limiting groove comprises a groove part on the first platform and a groove part on the second platform, the first platform and / or the second platform is provided with a third strip-shaped mounting hole, a third adjusting bolt is arranged in the third strip-shaped mounting hole, the third adjusting bolt passes through the third strip-shaped mounting hole to be threadedly connected with the horizontal adjusting plate, so that the first platform and / or the second platform is movably and adjustably mounted to the horizontal adjusting plate, and the first platform and the second platform move away from or approach each other to adjust the size of the limiting groove, so that the limiting groove is adapted to limit baffle of different sizes.

[0010] Further, two mutually parallel first strip-shaped mounting holes form a group, at least one group of first strip-shaped mounting holes is arranged on the vertical plate, and the number of first adjusting bolts is not less than the number of first strip-shaped mounting holes; two mutually parallel second strip-shaped mounting holes form a group, at least one group of second strip-shaped mounting holes is arranged at each end of the first plate body unit, and the number of second adjusting bolts is not less than the number of second strip-shaped mounting holes; two mutually parallel third strip-shaped mounting holes form a group, at least one group of third strip-shaped mounting holes is arranged on the first platform and / or at least one group of third strip-shaped mounting holes is arranged on the second platform, and the number of third adjusting bolts is not less than the number of third strip-shaped mounting holes.

[0011] Further, the first telescopic column is an elastic telescopic column, and the first telescopic column comprises a first telescopic sleeve shaft and a first telescopic elastic piece sleeved on the first telescopic sleeve shaft.

[0012] Further, the cell clamp further comprises a side fixing piece oppositely arranged on the floating bottom plate and a floating side plate assembly, the floating side plate assembly comprises a floating side plate, a side fixing seat, and a plurality of second telescopic columns, the plurality of second telescopic columns are arranged on the side fixing seat towards the side fixing piece, the floating side plate is arranged at the end of the plurality of second telescopic columns towards the side fixing piece, and the side fixing piece and the floating side plate are matched with each other to clamp the cell.

[0013] Further, the second telescopic column is an elastic telescopic column, and the second telescopic column comprises a second telescopic sleeve shaft and a second telescopic elastic piece sleeved on the second telescopic sleeve shaft.

[0014] The cell and the tab welding tool have the following beneficial effects:

[0015] 1. The cell clamp can be adjusted in size in the width and height directions to adapt to clamping cells of various types and sizes.

[0016] 2. The limiting support can also be moved in the width and height directions through the movable adjusting assembly to ensure that the tabs on the limiting support can be stably attached and extended to the end surface area to be welded of the cell.

[0017] 3. Three limiting supports are arranged at the left and right front three side positions of the cell, and a technician can select the limiting support on which the tab is placed according to actual welding requirements to adapt to the welding requirements of tabs in different directions.

[0018] 4. The limiting support can also be adjusted to change the size of the limiting groove thereon, thereby adapting to clamping tabs of different widths.

[0019] The cell and the tab welding tool can meet the comprehensive welding requirements of various types of cells, various tabs, and different tab directions, greatly reduce the battery test cost, effectively reduce the probability of errors in test due to incorrect replacement, have high flexibility, and have wide application range. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application. In the drawings:

[0021] Figure 1 It is the overall structural diagram of the welding tool of the embodiment;

[0022] Figure 2 It is the structural diagram of the battery cell clamp of the embodiment;

[0023] Figure 3 It is the structural diagram of the first limiting support of the embodiment;

[0024] Figure 4 It is the structural diagram of the second limiting support of the embodiment;

[0025] Figure 5 It is the structural diagram of the movable adjusting assembly of the embodiment;

[0026] Figure 6 It is the structural explosion diagram of the horizontal adjusting plate of the embodiment;

[0027] 1-battery cell clamp, 11-floating bottom plate, 12-upper fixing part, 13-stand, 14-first telescopic column, 15-side fixing part, 16-floating side plate assembly, 161-floating side plate, 162-side fixing seat, 163-second telescopic column;

[0028] 2-movable adjusting assembly, 21-stand plate, 22-vertical adjusting plate, 23-first bar-shaped mounting hole, 24-horizontal adjusting plate, 241-first plate body unit, 242-second plate body unit, 243-third plate body unit, 244-second bar-shaped mounting hole;

[0029] 3-limiting support, 31-first support, 32-second support, 33-third bar-shaped mounting hole;

[0030] 4-limiting groove, 5-base;

[0031] 6-barrel, 7-battery cell. DETAILED DESCRIPTION

[0032] The orientation terms mentioned or possibly mentioned in the present specification, such as up, down, left, right, front, back, front side, back side, top, bottom, etc., are defined with respect to the structure shown in the drawings, and the words "inner" and "outer" refer to the direction towards or away from the geometric center of a particular component, which are relative concepts, so it is possible to change accordingly according to different positions, different use states. Therefore, these or other orientation terms should not be interpreted as limiting terms.

[0033] Please refer to Figure 1 The utility model discloses a kind of welding tool of battery cell and pad, the welding tool includes battery cell clamp 1, limiting platform 3, pedestal 5, battery cell clamp 1 and limiting platform 3 are all arranged on pedestal 5, battery cell clamp 1 is used to hold the battery cell to be welded, the size of battery cell clamp 1 can be adjusted to adapt to hold the battery cell of different size specifications;Limiting platform 3 is used to limit and accommodate pad, limiting platform 3 is equipped with three, and three limiting platform 3 are respectively arranged from left, front, right three directions, the limiting groove 4 for accommodating and limiting pad is all set on three limiting platform 3, one side of limiting groove 4 is equipped with notch for pad to extend outward, the notch of limiting groove 4 of limiting platform 3 on the first plate body unit 241 is towards rear, the notch of limiting groove 4 of limiting platform 3 on the second plate body unit 242 is towards right side, the notch of limiting groove 4 of limiting platform 3 on the third plate body unit 243 is towards left side, the installation direction of pad limited and accommodated by three limiting platform 3 is different, the end surface area to be welded of battery cell is held by battery cell clamp 1 to extend into the area surrounded by three limiting platform 3, and skilled personnel can selectively place pad on one of limiting platform 3 according to technical requirements, so that pad is in correct direction when welding with battery cell.

[0034] In addition, movable adjusting assembly 2 is provided on pedestal 5, and three limiting platform 3 are all arranged on movable adjusting assembly 2, and three limiting platform 3 can be vertically lifted and moved through movable adjusting assembly 2 to adapt to battery cell of different height.

[0035] Moreover, among the three limiting platform 3, the limiting platform 3 arranged on the front side can be moved itself to widen or narrow along left-right direction to adapt to hold pad of different width size, and the whole body can be moved along left-right direction on movable adjusting assembly 2 to control pad to be in different position in horizontal left-right direction, so that pad can be accurately attached to the welding area of upper end surface of battery cell;The two limiting platform 3 arranged on left side and right side are affected by the setting direction of themselves, in addition to that they can be moved themselves to lengthen or shorten along front-back direction to adapt to hold pad of different width size, they can also be moved along left-right direction through movable adjusting assembly 2 to further accurately attach pad to the welding area of upper end surface of battery cell.

[0036] Please refer to Figure 2 In order to realize the function of adjustable size of the battery cell clamp 1, in the embodiment, the battery cell clamp 1 comprises a floating bottom plate 11, an upper fixing piece 12, a column 13, four first telescopic columns 14, the four first telescopic columns 14 are vertically fixed and arranged on the base 5 and are distributed in a rectangular dot shape on the base 5, the column 13 is vertically fixed and installed on the left rear side of the base 5, the floating bottom plate 11 is fixedly connected with the upper ends of the four first telescopic columns 14, and the upper fixing piece 12 is fixedly installed at the upper end of the column 13; for this, the technician can place the battery cell on the floating bottom plate 11, and then adjust the telescopic length of the four first telescopic columns 14 at the same time to make the floating bottom plate 11 move in the height direction until the upper end surface of the battery cell on it abuts against the upper fixing piece 12, so that the upper fixing piece 12 and the floating bottom plate 11 cooperate to clamp and fix the battery cell.

[0037] In the embodiment, the first telescopic column 14 comprises a first telescopic sleeve shaft and a first telescopic elastic piece sleeved on the first telescopic sleeve shaft, the first telescopic elastic piece is a spring, and the first telescopic sleeve shaft can automatically push up the floating bottom plate 11 under the elastic force of the spring for battery cells of different heights, so that the floating bottom plate 11 automatically pushes up the battery cell on it against the lower side of the upper fixing piece 12 to clamp the battery cell of different height sizes.

[0038] It should be noted that: in other embodiments, the first telescopic column 14 can be a mechanical adjustment telescopic structure; for example, the first telescopic column 14 comprises a shaft sleeve and a shaft body, a clamping bolt is radially and threadedly arranged on the shaft sleeve, and the technician can mechanically adjust the overall length of the first telescopic column 14 by loosening or tightening the clamping bolt to adjust the height position of the floating bottom plate 11; in addition, the number of the first telescopic column 14 is not limited to four, which can be three or five or other numbers, the upper fixing piece 12 can be a square plate or other shaped plate body in addition to a strip-shaped plate, and the first telescopic elastic piece can be other elastic structures.

[0039] In addition, the battery cell clamp 1 further comprises a side fixing piece 15 and a floating side plate assembly 16 oppositely arranged on the floating bottom plate 11. The side fixing piece 15 is an L-shaped plate body, and the side fixing piece 15 is arranged on the left side of the floating bottom plate 11. The floating side plate assembly 16 is oppositely arranged on the right side of the floating bottom plate 11. Part of the plate body of the side fixing piece 15 is in front of the floating bottom plate 11. Moreover, the floating side plate assembly 16 comprises a floating side plate 161, a side fixing seat 162, and four second telescopic columns 163. The side fixing seat 162 is fixedly installed on the right side of the floating bottom plate 11. The four second telescopic columns 163 are all horizontally arranged on the left side of the side fixing seat 162. The floating side plate 161 is fixedly connected with the left ends of the four second telescopic columns 163. Therefore, the technician can place the battery cell on the floating bottom plate 11, and then adjust the telescopic length of the four second telescopic columns 163 at the same time, so that the floating side plate 161 moves to the left and pushes the battery cell on the floating bottom plate 11 to abut against the side fixing piece 15, thereby cooperating with the side fixing piece 15 in the width direction to clamp and fix the battery cell.

[0040] In the embodiment, the second telescopic column 163 comprises a second telescopic sleeve shaft and a second telescopic elastic piece sleeved on the second telescopic sleeve shaft. The second telescopic elastic piece is a spring. For battery cells with different widths, the second telescopic sleeve shaft can automatically push the floating side plate 161 to the left under the elastic force of the spring, so that the floating side plate 161 automatically moves to the left to abut the battery cell against the side fixing piece 15, so that the battery cell clamp 1 can also adapt to clamp battery cells with different widths.

[0041] It should be noted that, in other embodiments, the second telescopic column 163 can also have a mechanical adjustment telescopic structure. For example, the second telescopic column 163 comprises a shaft sleeve and a shaft body. A clamping bolt is arranged on the shaft sleeve in a radial screw thread. The technician can loosen or tighten the clamping bolt to mechanically adjust the overall length of the second telescopic column 163, so as to adjust the horizontal position of the floating side plate 161. In addition, the number of second telescopic columns 163 is not limited to four. It can be three or five or other numbers. In addition to being an L-shaped plate, the side fixing piece 15 can also be a plate body of other shapes.

[0042] Please refer to Figure 3In this embodiment, the movable adjustment component 2 includes a vertical plate 21, a vertical adjustment plate 22, and a horizontal adjustment plate 24. The vertical plate 21 is fixedly installed on the base 5, and the horizontal adjustment plate 24 is fixedly installed on the upper end of the vertical adjustment plate 22. The vertical adjustment plate 22 has two parallel first strip-shaped mounting holes 23, and each of the two first strip-shaped mounting holes 23 is provided with a first adjusting bolt. The vertical plate 21 is provided with a corresponding threaded hole. Each of the two first adjusting bolts passes through one of the first strip-shaped mounting holes 23 and is threadedly connected to the vertical plate 21, so that the vertical adjustment plate 22 can be movably and adjustably installed on the vertical plate 21. In this way, the technician can loosen the two first adjusting bolts to adjust the height of the vertical adjustment plate 22, thereby indirectly adjusting the height position of the limiting platform 3. The technician can also tighten the two first adjusting bolts to lock the vertical adjustment plate 22 to maintain the current height of the limiting platform 3.

[0043] In addition, please see Figure 4 , refer to Figure 1 As shown, the horizontal adjustment plate 24 includes a first plate unit 241, a second plate unit 242, and a third plate unit 243. Each of the first plate unit 241, second plate unit 242, and third plate unit 243 is equipped with a limiting platform 3. The first plate unit 241 is directly fixedly installed on the upper end of the vertical adjustment plate 22. Two second strip-shaped mounting holes 244 are provided at both the left and right ends of the first plate unit 241. All four second strip-shaped mounting holes 244 extend to the left and right. Each of the four second strip-shaped mounting holes 244 contains a second adjusting bolt. The second plate unit 242 and the third plate unit 243 are provided with threaded holes. Two second adjusting bolts each pass through one of the second strip-shaped mounting holes 244 at the left end of the first plate unit 241 to be threadedly connected to the second plate unit 242, allowing the second plate unit 242 to be movably and adjustably positioned at the left end of the first plate unit 241. The other two second adjusting bolts each pass through... Each of the first plate unit 241 has a second strip-shaped mounting hole 244 at its right end for threaded connection with the third plate unit 243, so that the third plate unit 243 is movably and adjustablely positioned at the right end of the first plate unit 241. For this purpose, a technician can loosen the two second adjusting bolts at the left end of the first plate unit 241 to adjust the position of the second plate unit 242 in the front-back direction, thereby adjusting the position of the tabs limited on the second plate unit 242 relative to the battery cell. A technician can also loosen the two second adjusting bolts at the right end of the first plate unit 241 to adjust the position of the second plate unit 242 in the front-back direction, thereby adjusting the position of the tabs limited on the second plate unit 242 relative to the battery cell. Alternatively, a technician can tighten the second adjusting bolts to lock the second plate unit 242 or the third plate unit 243, thereby stabilizing the current position of the tabs on the second plate unit 242 or the third plate unit 243.

[0044] In this embodiment, the limiting platform 3 includes a first platform 31 and a second platform 32, and the limiting groove 4 includes a groove portion located on the first platform 31 and a groove portion located on the second platform 32. Technicians can adaptably install both the first platform 31 and the second platform 32 so that the limiting platform 3 on the first plate unit 241 can move left and right on the horizontal adjustment plate 24 to adjust the position of the contacts on the first plate unit 241 in the left and right directions, ensuring precise alignment between the contacts on the first plate unit 241 and the area to be soldered to the battery cell. Fitting; and because both the second plate unit 242 and the third plate unit 243 can move relative to the first plate unit 241 in the left and right directions to adjust the position of the limiting platform 3 on the second plate unit 242 and the limiting platform 3 on the third plate unit 243 in the horizontal left and right directions respectively, the technician can simply install only the second platform 32 on the second plate unit 242 and the third plate unit 243 so that the limiting platform 3 on the second plate unit 242 and the third plate unit 243 can movably clamp the bar sheets of different widths.

[0045] For details, please refer to Figure 5 , refer to Figure 1 As shown, the limiting platform 3 set on the first plate unit 241 includes a first platform 31 and a second platform 32. Both the first platform 31 and the second platform 32 are provided with two third strip-shaped mounting holes 33. Each third strip-shaped mounting hole 33 contains a third adjusting bolt, which passes through the third strip-shaped mounting hole 33 and is threadedly connected to the first plate unit 241, so that the first platform 31 and the second platform 32 can be movably mounted onto the first plate unit 241 respectively. For this purpose, a technician can screw on the two third adjusting bolts on the first platform 31 or the second platform 32. The technician can tighten the bolts and control the first platform 31 and the second platform 32 to move away from or towards each other, thereby adjusting the size of the limiting groove 4 so that the limiting groove 4 on the first plate unit 241 can accommodate the clamping of bar pieces of different widths. In addition, the technician can also simultaneously tighten the four third adjusting bolts on the first platform 31 and the second platform 32 to control the first platform 31 and the second platform 32 to move together in the left and right direction, so as to adjust the position of the bar piece on the first plate unit 241 in the left and right direction, so that the bar piece on the first plate unit 241 is precisely attached to the welding area of ​​the battery cell.

[0046] Please see Figure 6The limiting table 3 on the second plate unit 242 and the third plate unit 243 has the same structure; taking the limiting table 3 on the second plate unit 242 as an example, the limiting table 3 on the second plate unit 242 also comprises a first table 31 and a second table 32, the limiting groove 4 comprises a groove part on the first table 31 and a groove part on the second table 32, the first table 31 is fixedly installed on the second plate unit 242, the second table 32 is provided with two third strip-shaped mounting holes 33, one third adjusting bolt is arranged in each of the two third strip-shaped mounting holes 33, and the two third adjusting bolts are respectively screwed through one third strip-shaped mounting hole 33 and are in threaded connection with the second plate unit 242, so as to movably install the second table 32 on the second plate unit 242; for this, the two third adjusting bolts on the second table 32 can be screwed, and the second table 32 is controlled to move away from or close to the first table 31, so as to adjust the size of the limiting groove 4, so that the limiting groove 4 on the second plate unit 242 can adapt to clamp the Ba sheet with different width sizes; and the position adjustment of the Ba sheet on the limiting table 3 on the second plate unit 242 in the horizontal plane is realized by movably adjusting the position of the second plate unit 242 relative to the first plate unit 241.

[0047] In the embodiment, the limiting table 3 on the third plate unit 243 is arranged in the same way as the limiting table 3 on the second plate unit 242, and thus is not described again.

[0048] It should be noted that: in other embodiments, two or more adjusting bolts can be arranged in one strip-shaped mounting hole.

[0049] The above-mentioned matters not mentioned are applicable to the prior art.

[0050] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electrode cell and tab welding tool, characterized by, The battery cell and the tab welding tool includes a battery cell clamp (1), a limiting support (3), a base (5), the battery cell clamp (1) includes a floating bottom plate (11), an upper fixing part (12), a stand column (13), a plurality of first telescopic columns (14), the stand column (13) and the plurality of first telescopic columns (14) are arranged on the base (5), the floating bottom plate (11) is arranged on the upper end of the plurality of first telescopic columns (14), the upper fixing part (12) is arranged on the upper end of the stand column (13), the upper fixing part (12) and the floating bottom plate (11) are matched to clamp the battery cell, the floating bottom plate (11) is moved up and down through the first telescopic column (14) to match the upper fixing part (12) to adapt to the battery cell of different size specifications, the limiting support (3) is used for limiting the tab, the limiting support (3) is movably arranged on the base (5), the limiting support (3) is adjusted to make the end of the limited tab extend and adhere to the upper end surface of the battery cell of different size specifications.

2. The welding fixture of claim 1, wherein, The base (5) is provided with an adjustable assembly (2), the adjustable assembly (2) is used for adjusting the position of the limiting support (3), the adjustable assembly (2) includes a vertical plate (21) and a vertical adjusting plate (22), the vertical plate (21) is fixedly installed on the base (5), a first strip-shaped mounting hole (23) is vertically arranged on the vertical adjusting plate (22), a first adjusting bolt is arranged in the first strip-shaped mounting hole (23), the first adjusting bolt is screwed with the vertical plate (21) through the first strip-shaped mounting hole (23) to movably adjust the vertical adjusting plate (22) to the vertical plate (21), the vertical adjusting plate (22) is vertically moved to adjust the position of the limiting support (3) in the height direction.

3. The welding fixture of claim 2, wherein, The adjustable assembly (2) further includes a horizontal adjusting plate (24), the horizontal adjusting plate (24) includes a first plate body unit (241), a second plate body unit (242) and a third plate body unit (243), the first plate body unit (241), the second plate body unit (242) and the third plate body unit (243) are provided with the limiting support (3), both ends of the first plate body unit (241) are provided with a second strip-shaped mounting hole (244), a second adjusting bolt is arranged in the second strip-shaped mounting hole (244), the second adjusting bolt is screwed with the first plate body unit (241) through the second strip-shaped mounting hole (244) to movably adjust the second plate body unit (242) or the third plate body unit (243) to the end of the first plate body unit (241), the second plate body unit (242) or the third plate body unit (243) is moved relative to the first plate body unit (241) to adjust the position of the limiting support (3) on the second plate body unit (242) or the third plate body unit (243) in the horizontal plane.

4. The welding fixture of claim 3, wherein, The second plate body unit (242) and the third plate body unit (243) are oppositely arranged, and the extending direction of the second strip-shaped mounting hole (244) is the direction in which the second plate body unit (242) moves away from or approaches the battery cell.

5. The welding fixture of claim 3, wherein, The limiting concave groove (4) is provided on the limiting platform (3) and is used for accommodating and limiting the bar piece. One side of the limiting concave groove (4) is provided with a gap for the bar piece to extend outward. The gaps of the limiting concave grooves (4) on the limiting platforms (3) on the first plate body unit (241), the second plate body unit (242) and the third plate body unit (243) are oriented differently.

6. The welding fixture of claim 5, wherein, The limiting platform (3) comprises a first platform (31) and a second platform (32). The limiting concave groove (4) comprises a groove part on the first platform (31) and a groove part on the second platform (32). The first platform (31) and / or the second platform (32) is provided with a third strip-shaped mounting hole (33). A third adjusting bolt is arranged in the third strip-shaped mounting hole (33). The third adjusting bolt passes through the third strip-shaped mounting hole (33) to be threadedly connected with the horizontal adjusting plate (24) so as to movably adjustably mount the first platform (31) and / or the second platform (32) on the horizontal adjusting plate (24). The first platform (31) and the second platform (32) move away from or approach each other to adjust the size of the limiting concave groove (4) so as to adapt the limiting concave groove (4) to different sizes of bar pieces.

7. The welding fixture of claim 6, wherein, The two mutually parallel first strip-shaped mounting holes (23) form a group. The vertical plate (21) is provided with at least one group of first strip-shaped mounting holes (23). The number of first adjusting bolts is not less than the number of first strip-shaped mounting holes (23). The two mutually parallel second strip-shaped mounting holes (244) form a group. The two ends of the first plate body unit (241) are each provided with at least one group of second strip-shaped mounting holes (244). The number of second adjusting bolts is not less than the number of second strip-shaped mounting holes (244). The two mutually parallel third strip-shaped mounting holes (33) form a group. The first platform (31) is provided with at least one group of third strip-shaped mounting holes (33) and / or the second platform (32) is provided with at least one group of third strip-shaped mounting holes (33). The number of third adjusting bolts is not less than the number of third strip-shaped mounting holes (33).

8. The welding fixture of claim 1, wherein, The battery cell clamp (1) further comprises a side fixing member (15) and a floating side plate assembly (16) oppositely arranged on the floating bottom plate (11). The floating side plate assembly (16) comprises a floating side plate (161), a side fixing seat (162) and a plurality of second telescopic columns (163). The plurality of second telescopic columns (163) are arranged on the side fixing seat (162) towards the side fixing member (15). The floating side plate (161) is arranged at the end of the plurality of second telescopic columns (163) towards the fixed side. The side fixing member (15) and the floating side plate (161) cooperate to clamp the battery cell. The floating side plate (161) is transversely movable through the second telescopic column (163) to cooperate with the side fixing member (15) to adapt to battery cells of different sizes.

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