CN220636815U - Spot welding fixture - Google Patents

Abstract

The application provides a spot welding fixture relates to lithium cell manufacturing technical field. The spot welding fixture includes: the first positioning plate is arranged on the bottom plate, the first positioning block and the second positioning block are arranged on the first positioning plate, the first positioning block is connected with the first positioning plate through a first sliding platform, and the second positioning block is connected with the first positioning plate through a second sliding platform; the second positioning plate is arranged on the bottom plate, is adjacent to the first positioning plate, is connected with the bottom plate through a third sliding platform and is provided with a positioning assembly for pressing the nickel plate of the protection plate and the battery core lug; the first locating block can move along the first direction, the second locating block can move along the second direction perpendicular to the first direction, and the second locating plate can move in the first direction or the second direction, so that the problem that in the prior art, the clamping assembly of the spot welding fixture needs to be repeatedly debugged, and the spot welding precision of a battery to be welded is low is solved.

Description

Spot welding fixture

Technical Field

The utility model relates to the technical field of lithium battery manufacturing, in particular to a spot welding fixture.

Background

A lithium battery is a battery using a nonaqueous electrolyte solution, with lithium metal or a lithium alloy as a negative electrode material. When the soft package lithium battery is produced, spot welding is needed to be carried out on the soft package lithium battery.

The spot welding fixture is required to be used for clamping during spot welding, the position of the clamping component on the spot welding fixture is continuously adjusted through the positions of the battery core and the protective plate by the existing spot welding fixture, repeated adjustment is required in the adjustment process, the time consumption is long, the clamping component is difficult to reach the ideal clamping position of the battery to be welded, and finally the spot welding precision of the battery is low.

Disclosure of Invention

The embodiment of the utility model aims to solve the technical problem that the spot welding precision of a battery to be welded is low because a clamping component of the spot welding clamp needs to be debugged repeatedly in the prior art.

The embodiment of the utility model provides a spot welding fixture, which comprises: the device comprises a bottom plate, a first positioning plate and a second positioning plate, wherein the first positioning plate is arranged on the bottom plate, a first positioning block and a second positioning block are arranged on the first positioning plate, the first positioning block is connected with the first positioning plate through a first sliding platform, and the second positioning block is connected with the first positioning plate through a second sliding platform; the second positioning plate is arranged on the bottom plate, the second positioning plate is arranged adjacent to the first positioning plate, the second positioning plate is connected with the bottom plate through a third sliding platform, and the second positioning plate is provided with a pressing claw for pressing the nickel sheet of the protection plate and the electrode lug of the battery cell; the first positioning block can move along a first direction, the second positioning block can move along a second direction perpendicular to the first direction, and the second positioning plate can move in the first direction or the second direction.

Further, the first sliding platform comprises a first base and a first connecting piece in sliding connection with the first base, the first base is arranged on the first positioning plate, and the first positioning block is arranged on the first connecting piece; the first base is provided with a first supporting piece, the first connecting piece is provided with a first fixing piece, the first sliding platform further comprises a first differential head arranged on the first supporting piece, and a first telescopic rod of the first differential head is connected with the first fixing piece.

Further, the second sliding platform comprises a second base and a second connecting piece which is in sliding connection with the second base, the second base is arranged on the first positioning plate, and the second positioning block is arranged on the second connecting piece; the second base is provided with a second supporting piece, the second connecting piece is provided with a second fixing piece, the second sliding platform further comprises a second differential head arranged on the second supporting piece, and a second telescopic rod of the second differential head is connected with the second fixing piece.

Further, the third sliding platform comprises a third base, a third connecting piece and a fourth connecting piece, wherein the third connecting piece is in sliding connection with the third base, the third connecting piece moves along the first direction, and the fourth connecting piece moves along the second direction; the third base is provided with a third supporting piece, the third connecting piece is provided with a third fixing piece, the third sliding platform further comprises a third differential head arranged on the third supporting piece, and a third telescopic rod of the third differential head is connected with the third fixing piece; the third connecting piece is provided with a fourth supporting piece, the fourth connecting piece is provided with a fourth fixing piece, the third sliding platform further comprises a fourth differential head arranged on the fourth supporting piece, and a fourth telescopic rod of the fourth differential head is connected with the fourth fixing piece.

Further, a plurality of first sliding grooves and first fasteners corresponding to the first sliding grooves are arranged on the first positioning blocks, the first fasteners penetrate through the first sliding grooves to be connected with the first connecting piece, and the first sliding grooves are long strips extending along the first direction.

Further, a plurality of second sliding grooves and second fasteners corresponding to the second sliding grooves are arranged on the second positioning blocks, the second fasteners penetrate through the second sliding grooves to be connected with the second connecting piece, and the second sliding grooves are long strips extending along the second direction.

Further, the positioning assembly comprises a rotating shaft, a pressing claw and a magnetic attraction piece, the rotating shaft is connected with the second positioning plate in a rotating mode, the pressing claw is arranged on the rotating shaft, the magnetic attraction piece is arranged on the second positioning plate, and the magnetic attraction piece corresponds to the pressing claw.

Further, the second positioning plate is provided with a plurality of accommodating grooves which are arranged at intervals along the first direction, and a third positioning block which is matched with the accommodating grooves.

Further, a third sliding groove is formed in the second positioning plate, a plurality of positioning holes are formed in the third sliding groove and are distributed at intervals along the first direction, a fourth positioning block is further arranged on the second positioning plate, a first long-strip-shaped containing hole extending along the first direction and a third fastening piece penetrating through the first containing hole and being connected with the positioning hole are formed in the fourth positioning block.

Further, the spot welding fixture further comprises a guide post and a guide sleeve sleeved on the guide post, wherein the guide post is arranged on one of the bottom plate or the positioning plate, and the guide sleeve is arranged on the other one of the bottom plate or the positioning plate; the spot welding fixture further comprises a screw and an elastic piece, wherein the elastic piece is arranged between the first positioning plate and the bottom plate, and the screw penetrates through the first positioning plate to be in threaded connection with the bottom plate.

Compared with the prior art, the spot welding fixture has the beneficial effects that the first positioning block and the first positioning plate relatively move in the first direction through the first sliding platform, the second positioning block and the first positioning plate relatively move in the second direction through the second sliding platform, namely, the first positioning block can limit the battery to be welded in the first direction, the second positioning block can limit the battery to be welded in the second direction, then the second positioning plate is matched with the battery to be welded in the first direction and the second direction, and the positioning assembly on the second positioning plate is matched with the movement of the second positioning plate to limit the lug of the battery to be welded. The first positioning block, the second positioning block and the second positioning plate can be moved more simply and conveniently by directly adjusting the first sliding platform, the second sliding platform and the third sliding platform, and the positioning modes of the sliding platforms do not need to repeatedly debug the positioning blocks on the spot welding fixture according to the battery to be welded, so that the distance between the first positioning block, the second positioning buckle and the second positioning plate and the battery to be welded can be adjusted more quickly and conveniently, the positioning accuracy of the battery to be welded can be improved, and the spot welding accuracy of the spot welding fixture is improved.

Drawings

The utility model will now be described in further detail with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic structural view of a spot welding jig according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a first positioning block and a first sliding platform according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a second positioning block and a second sliding platform according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a third sliding platform according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a third sliding platform according to an embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of a second positioning plate according to an embodiment of the present utility model;

FIG. 7 is a schematic cross-sectional view of a spot welding fixture according to an embodiment of the present utility model;

fig. 8 is a schematic structural view of a first reference block and a second reference block according to an embodiment of the present utility model;

fig. 9 is a schematic view showing a structure in which a first reference block and a second reference block are provided in a spot welding jig according to an embodiment of the present utility model.

The accompanying drawings: 1000. a spot welding fixture; 100. a bottom plate; 200. a first positioning plate; 201. a first positioning block; 2011. a first chute; 2012. a first fastener; 202. a first sliding platform; 2021. a first base; 2022. a first connector; 2023. a first differentiating head; 2024. a first support; 2025. a first fixing member; 203. a second positioning block; 2031. a second chute; 2032. a second fastener; 204. a second sliding platform; 2041. a second base; 2042. a second connector; 2043. a second differentiating head; 2044. a second support; 2045. a second fixing member; 300. a second positioning plate; 301. a pressing claw; 302. a rotating shaft; 303. a third sliding platform; 3031. a third base; 3032. a third connecting member; 3033. a fourth connecting member; 3035. a third differentiating head; 3036. a third support; 3037. a third fixing member; 3038. a fourth differentiating head; 3039. a fourth support; 3040. a fourth fixing member; 400. a receiving groove; 401. a third positioning block; 500. a third chute; 501. positioning holes; 502. a fourth positioning block; 503. a third fastener; 504. a first accommodation hole; 600. a guide post; 700. guide sleeve; 800. a screw; 900. an elastic member; 1001. a first reference block; 1002. and a second reference block.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. Preferred embodiments of the present utility model will now be described in detail with reference to the accompanying drawings.

An embodiment of the present utility model provides a spot welding jig 1000, as shown in fig. 1 to 5, the spot welding jig 1000 including: the bottom plate 100, the first positioning plate 200 and the second positioning plate 300, wherein the first positioning plate 200 is arranged on the bottom plate 100, the first positioning plate 200 is provided with a first positioning block 201 and a second positioning block 203, the first positioning block 201 is connected with the first positioning plate 200 through a first sliding platform 202, and the second positioning block 203 is connected with the first positioning plate 200 through a second sliding platform 204; the second positioning plate 300 is arranged on the bottom plate 100, the second positioning plate 300 is arranged adjacent to the first positioning plate 200, the second positioning plate 300 is connected with the bottom plate 100 through a third sliding platform 303, and the second positioning plate 300 is provided with a pressing claw 301 for pressing a nickel sheet of the protection plate and a battery cell tab; wherein the first positioning block 201 is movable in a first direction (as shown in an x direction in fig. 1), the second positioning block 203 is movable in a second direction (as shown in a y direction in fig. 1) perpendicular to the first direction, and the second positioning plate 300 is movable in the first direction or the second direction.

The first positioning block 201 moves relatively to the first positioning plate 200 in the first direction through the first sliding platform 202, the second positioning block 203 moves relatively to the first positioning plate 200 in the second direction through the second sliding platform 204, namely, the first positioning block 201 can limit the battery to be welded in the first direction, the second positioning block 203 can limit the battery to be welded in the second direction, then the second positioning plate 300 is matched with the battery to be welded in the first direction and the second direction, and the positioning assembly on the second positioning plate 300 is matched with the movement of the second positioning plate 300 to limit the tab of the battery to be welded. The positioning plate is directly moved by directly adjusting the first sliding platform 202, the second sliding platform 204 and the third sliding platform 303, so that the first positioning block 201, the second positioning block 203 and the second positioning plate 300 can be moved more simply and conveniently, the spot welding fixture 1000 can adapt to the size of a battery more conveniently and rapidly, and the battery to be welded is limited. Meanwhile, by adjusting the positioning modes of the first sliding platform 202, the second sliding platform 204 and the third sliding platform 303, the first positioning block 201, the second positioning block 203 and the second positioning plate 300 on the spot welding fixture 1000 do not need to be repeatedly debugged according to the battery to be welded, the distance between the first positioning block 201, the second positioning block 203 and the second positioning plate 300 and the battery to be welded can be adjusted more quickly and conveniently, the positioning accuracy of the battery to be welded can be improved, and therefore the spot welding accuracy of the spot welding fixture 1000 is improved.

Specifically, the first positioning block 201, the second positioning block 203 and the second positioning plate 300 controlled by the first sliding platform 202, the second sliding platform 204 and the third sliding platform 303 can all move rapidly, so that the adjustment time of the spot welding fixture 1000 can be shortened in the positioning process of the battery to be welded, and likewise, the first positioning block 201, the second positioning block 203 and the second positioning plate 300 on the spot welding fixture 1000 can also move rapidly in the process of replacing the battery to be welded after the spot welding process is completed on the battery to be welded, so that the time of replacing the battery to be welded is effectively saved, the production cost is saved, and the processing efficiency is improved.

Referring to fig. 2, the first sliding platform 202 includes a first base 2021 and a first connecting member 2022 slidably connected to the first base 2021, the first base 2021 is disposed on the first positioning plate 200, and the first positioning block 201 is disposed on the first connecting member 2022; the first base 2021 is provided with a first supporting member 2024, the first connecting member 2022 is provided with a first fixing member 2025, the first sliding platform 202 further includes a first micro head 2023 disposed on the first supporting member 2024, and a first telescopic rod of the first micro head 2023 is connected to the first fixing member 2025.

In this embodiment, the first base 2021 is slidably connected to the first connecting member 2022, a boss is disposed on the first base 2021, a chute is disposed on the first connecting member 2022, and an extending direction of the boss and the chute is a first direction, so when the first connecting member 2022 moves relatively to the first base 2021 along the first direction, the first slider connected to the first connecting member 2022 also moves relatively to the first positioning plate 200 along the first direction, so that the first sliding platform 202 can quickly and effectively complete the movement in the first direction, and the adjusting time of the first sliding platform 202 can be effectively reduced.

Specifically, the first micro head 2023 is connected to the first fixing member 2025 through the first supporting member 2024, in this embodiment, the first supporting member 2024 on the first base 2021 functions to stabilize the first micro head 2023 and guide the first micro head 2023, when the first positioning block 201 needs to be moved, the first micro head 2023 is adjusted, and the first telescopic rod correspondingly extends or shortens, so as to drive the first connecting member 2022 to move in the first direction relative to the first base 2021. By controlling the first micro head 2023, the movement of the first connecting piece 2022 on the first base 2021 can be accurately controlled, the adjustment of the adjusting part can be normalized and refined, the adjustment can be accurately performed through scales, the accuracy of the control of the first sliding platform 202 is effectively improved, the limit capability of the spot welding fixture 1000 on a battery to be welded is improved, and the control precision of the spot welding fixture 1000 is improved.

In this embodiment, the first sliding platform 202 further includes a fixing structure, where the fixing structure includes a connecting piece disposed on the first base 2021 and a bolt passing through the connecting piece and connected with the first connecting piece 2022, when the first connecting piece 2022 needs to be fixed, the bolt is fixed with the first connecting piece 2022, so that the bolt, the connecting piece and the first connecting piece 2022 are relatively stable, and the connecting piece is fixedly connected with the first base 2021, so that the first connecting piece 2022 is relatively stable with the first base 2021, thereby fixing the first connecting piece 2022.

Referring to fig. 3, the second sliding platform 204 includes a second base 2041 and a second connecting member 2042 slidably connected to the second base 2041, the second base 2041 is disposed on the first positioning plate 200, and the second positioning block 203 is disposed on the second connecting member 2042; wherein the second base 2041 is provided with a second support member 2044, the second connecting member 2042 is provided with a second fixing member 2045, the second sliding platform 204 further comprises a second micro head 2043 arranged on the second support member 2044, and a second telescopic rod of the second micro head 2043 is connected with the second fixing member 2045 _。

In this embodiment, the second base 2041 is slidably connected to the second connecting member 2042, the second base 2041 is provided with a boss, the second connecting member 2042 is provided with a chute, and the extending direction of the boss and the chute is the second direction, so that when the second connecting member 2042 moves relatively to the second base 2041 along the second direction, the second slider connected to the second connecting member 2042 also moves relatively to the first positioning plate 200 along the second direction, so that the second sliding platform 204 can quickly and effectively complete the movement in the second direction, and the adjusting time of the second sliding platform 204 can be effectively reduced.

Specifically, the second micro-head 2043 is connected to the second fixing member 2045 through the second supporting member 2044, in this embodiment, the second supporting member 2044 on the second base 2041 serves to stabilize the second micro-head 2043 and guide the second micro-head 2043, when the second positioning block 203 needs to be moved, the second micro-head 2043 is adjusted, and the second telescopic rod correspondingly extends or shortens, so as to drive the second connecting member 2042 to move in the second direction relative to the second base 2041. By controlling the second micro head 2043, the movement of the second connecting piece 2042 on the second base 2041 can be accurately controlled, the adjustment of the adjusting part can be normalized and refined, the adjustment can be accurately performed through scales, the accuracy of the control of the second sliding platform 204 is effectively improved, the limit capacity of the spot welding clamp 1000 to the battery to be welded is improved, and the control precision of the spot welding clamp 1000 is improved.

In this embodiment, the second sliding platform 204 further includes a fixing structure, where the fixing structure includes a connecting piece disposed on the second base 2041 and a bolt passing through the connecting piece and connected with the second connecting piece 2042, when the second connecting piece 2042 needs to be fixed, the bolt is fixed with the second connecting piece 2042, so that the bolt, the connecting piece and the second connecting piece 2042 are relatively stable, and the connecting piece is fixedly connected with the second base 2041, so that the second connecting piece 2042 and the second base 2041 are relatively stable, and the second connecting piece 2042 is fixed.

Referring to fig. 4 and 5, the third sliding platform 303 includes a third base 3031, a third link 3032 slidably coupled to the third base 3031, and a fourth link 3033 slidably coupled to the third link 3032, the third link 3032 moving in a first direction and the fourth link 3033 moving in a second direction; wherein, the third base 3031 is provided with a third supporting member 3036, the third connecting member 3032 is provided with a third fixing member 3037, the third sliding platform 303 further includes a third differential head 3035 disposed on the third supporting member 3036, and a third telescopic rod of the third differential head 3035 is connected with the third fixing member 3037; the third connecting member 3032 is provided with a fourth supporting member 3039, the fourth connecting member 3033 is provided with a fourth fixing member 3040, the third sliding platform 303 further comprises a fourth differential head 3038 provided on the fourth supporting member 3039, and a fourth telescopic rod of the fourth differential head 3038 is connected with the fourth fixing member 3040 _。

In this embodiment, the third base 3031 is slidably connected to the third connecting member 3032, a boss is disposed on the third base 3031, a chute is disposed on the third connecting member 3032, and the extending direction of the boss and the chute is the first direction, so when the third connecting member 3032 moves relatively to the third base 3031 along the first direction, the second positioning plate 300 connected to the third connecting member 3032 also moves relatively to the bottom plate 100 along the first direction, so that the third sliding platform 303 can quickly and effectively complete the movement in the first direction, and the adjustment time of the third sliding platform 303 can be effectively reduced.

Similarly, the third connecting member 3032 is slidably connected to the fourth connecting member 3033, in this embodiment, the third connecting member 3032 is provided with a boss, the fourth connecting member 3033 is provided with a chute, and the extending direction of the boss and the chute is the second direction, so when the fourth connecting member 3033 moves relatively to the third connecting member 3032 along the second direction, the second positioning plate 300 connected to the fourth connecting member 3033 also moves relatively to the bottom plate 100 along the second direction, so that the third sliding platform 303 can quickly and effectively complete the movement in the second direction, and the adjustment time of the third sliding platform 303 can be effectively reduced.

Specifically, the third differential head 3035 is connected to the third fixing member 3037 by passing through the third supporting member 3036, and in this embodiment, the third supporting member 3036 on the third base 3031 functions to stabilize the third differential head 3035 and guide the third differential head 3035, and when the third positioning block 401 needs to be moved, the third differential head 3035 is adjusted, and the third telescopic rod is correspondingly extended or shortened, so as to drive the third connecting member 3032 to move in the first direction relative to the third base 3031. By controlling the third differential head 3035, the movement of the third connecting member 3032 on the third base 3031 can be accurately controlled, the adjustment of the adjusting part can be normalized and refined, the adjustment can be accurately performed through scales, the accuracy of the control of the third sliding platform 303 is effectively improved, the limit capability of the spot welding fixture 1000 to the battery to be welded is improved, and the control precision of the spot welding fixture 1000 is improved.

Similarly, the fourth differential head 3038 is coupled to the fourth fixed member 3040 by a fourth support member 3039. In this embodiment, the fourth support member 3039 on the third member 3032 serves to stabilize the fourth differential head 3038 and to guide the fourth differential head 3038. When the fourth positioning block 502 needs to be moved, the fourth differential head 3038 is adjusted and the fourth telescopic rod is correspondingly extended or shortened to thereby drive the fourth member 3033 to move relative to the third member 3032 in the second direction. By controlling the fourth differential head 3038, the movement of the fourth connecting member 3033 on the third connecting member 3032 can be precisely controlled, the adjustment of the adjusting portion can be normalized and refined, the adjustment can be accurately performed through the scale, the precision of the control of the third sliding platform 303 is effectively improved, the limit capability of the spot welding fixture 1000 to the battery to be welded is improved, and the control precision of the spot welding fixture 1000 is improved.

Referring to fig. 2, the first positioning block 201 is provided with a plurality of first sliding grooves 2011 and first fasteners 2012 corresponding to the first sliding grooves 2011, the first fasteners 2012 penetrate through the first sliding grooves 2011 to be connected with the first connecting pieces 2022, and the first sliding grooves 2011 are elongated and extend along a first direction.

The setting direction of first spout 2011 is the first direction, and the extending direction of first spout 2011 is the same with the direction of movement of first locating piece 201 promptly, and the shape of first spout 2011 is rectangular shape, then first locating piece 201 can remove in first direction relative first fastener 2012, just so can adjust the position of first locating piece 201 once more after first sliding platform 202 adjusts first locating piece 201 to the specific size and the shape of cooperation battery, effectively improved the movable range of first locating piece 201, effectively improved spot welding clamp 1000 and to the suitability of different size batteries.

In this embodiment, a plurality of first sliding grooves 2011 are provided, the first sliding grooves 2011 and the first fastening members 2012 are arranged in a one-to-one correspondence, and the plurality of first sliding grooves 2011 are provided, so that the first sliding grooves 2011 can be prevented from shifting and swaying when moving relative to the first fastening members 2012, and the plurality of first sliding grooves 2011 can mutually play a guiding role.

Referring to fig. 3, a plurality of second sliding grooves 2031 and second fastening members 2032 corresponding to the second sliding grooves 2031 are provided on the second positioning block 203, the second fastening members 2032 penetrate through the second sliding grooves 2031 to be connected with the second connecting members 2042, and the second sliding grooves 2031 are elongated and extend along the second direction.

The setting direction of the second sliding groove 2031 is the second direction, that is, the extending direction of the second sliding groove 2031 and the moving direction of the second positioning block 203 are two, and the shape of the second sliding groove 2031 is long, so that the second positioning block 203 can move in the second direction relative to the second fastening piece 2032, after the second sliding platform 204 adjusts the second positioning block 203, the position of the second positioning block 203 can be adjusted again, so as to match with the specific size and shape of the battery, effectively improve the movable range of the second positioning block 203, and effectively improve the adaptability of the spot welding fixture 1000 to batteries with different sizes.

In this embodiment, a plurality of second sliding grooves 2031 are provided, the second sliding grooves 2031 are disposed in a one-to-one correspondence with the second fastening members 2032, and the plurality of second sliding grooves 2031 are provided, so that the second sliding grooves 2031 can be prevented from being offset and swaying when moving relative to the second fastening members 2032, and the plurality of second sliding grooves 2031 can mutually play a guiding role.

In the above embodiment, referring to fig. 1, 8 and 9, the spot welding jig 1000 is preliminarily positioned by being engaged with the first positioning block 201 and the second positioning block 203 by the first reference block 1001, respectively, and in the actual spot welding process, the first reference block 1001 is disposed on the first positioning plate 200, one side of the first reference block 1001 close to the first positioning block 201 is engaged with the first positioning block 201, and the first positioning block 201 is moved toward the first reference block 1001 in the first direction by the engagement of the first chute 2011 and the first fastener 2012 until the first positioning block 201 abuts against the first reference block 1001; the side of the first reference block 1001 near the second positioning block 203 is matched with the second positioning block 203, and the second positioning block 203 is matched with the second fastening piece 2032 through the second sliding groove 2031, so that the second positioning block 203 moves towards the first reference block 1001 along the second direction until the second positioning block 203 abuts against the first reference block 1001. After the first positioning block 201 and the second positioning block 203 are fixed, the first micro head 2023 and the second micro head 2043 may be adjusted. Up to this point, the first reference block 1001 has been limited to the first positioning plate 200 in both the first direction and the second direction, and at this time, the first reference block 1001 is removed, and since there is a size and a size difference between the first reference block 1001 and the battery to be welded, and the size of the first reference block 1001 and the battery to be welded is known, the size and the size difference between the first reference block 1001 and the battery to be welded can be calculated. Then, the previously calculated dimensional difference between the first reference block 1001 and the battery to be welded in the first direction is converted into the number of turns of the first micro head 2023 by the scale on the first micro head 2023, and the number of turns required for turning at this time makes the first positioning block 201 move the difference inwards or outwards in the first direction, so as to achieve the purpose of accurate adjustment in the first direction; similarly, the dimensional difference between the first reference block 1001 and the battery to be welded in the second direction calculated previously is converted into the number of turns of the second micro head 2043 by the scale on the second micro head 2043, and the number of turns required for the rotation at this time causes the second positioning block 203 to move the difference in the second direction or outwards, so as to achieve the purpose of accurate adjustment in the second direction, and finally, after the first positioning block 201 and the second positioning block 203 are adjusted, the battery to be welded is placed on the first positioning plate 200. In this way, the accuracy of the positioning of the first positioning block 201 and the second positioning block 203 in the first direction and the second direction of the battery to be welded can be improved, the size difference is converted into the rotation number of turns through the scales on the first micro head 2023 and the second micro head 2043, then the first positioning block 201 and the second positioning block 203 are moved, the situation that the first positioning block 201 and the second positioning block 203 are too tightly or excessively loose in positioning clamping can be prevented, the influence and the damage are caused on the battery to be welded, or the positioning effect cannot be achieved, and the positioning accuracy of the battery to be welded by the spot welding fixture 1000 is higher.

Referring to fig. 6, the positioning assembly includes a rotation shaft 302 rotatably connected to the second positioning plate 300, a pressing jaw 301 provided on the rotation shaft 302, and a magnetic attraction member provided on the second positioning plate 300; wherein the magnetic attraction member corresponds to the pressing claw 301.

The pressing claw 301 is used for limiting and pressing a nickel plate of a protection plate of a battery to be welded and a battery core lug, after the second positioning plate 300 is adjusted to a proper position, the clamping claw can adjust the position of the clamping claw on the rotating shaft 302, after the position of the clamping claw is adjusted to a position capable of pressing the lug of the battery to be welded, the pressing claw 301 is pressed against the nickel plate of the protection plate of the battery to be welded and the lug, and a bolt connected with the rotating shaft 302 and the second positioning plate 300 is fastened to fix the pressing claw 301.

In this embodiment, the second positioning plate 300 is further provided with magnetic attraction pieces, and the magnetic attraction pieces are adjacently arranged along the first direction, and the magnetic attraction pieces are used for attracting the pressing claw 301 and attracting the pressing claw 301, so as to assist the pressing claw 301 to compress the nickel sheet and the tab of the protection plate. Correspondingly, the pressing claw 301 may be provided with a magnetic attraction piece corresponding to the magnetic attraction piece, for example, a magnet, for being matched and positioned with the magnetic attraction piece, or the pressing claw 301 may be a metal piece capable of being magnetically attracted and matched with the magnetic attraction piece so as to compress and position the nickel plate and the tab of the protective plate with the welded battery.

Referring to fig. 6, the second positioning plate 300 is provided with a plurality of receiving grooves 400 spaced apart in the first direction, and third positioning blocks 401 coupled with the receiving grooves 400.

The third sliding platform 303 is used for matching with the protection board nickel piece of the battery to be welded to play a role in positioning and limiting, and the distance between the protection board nickel piece and the battery to be welded can be calculated by reading on the same accommodating groove 400, so that the positioning of the protection board is more accurate, and the accuracy of the whole spot welding fixture 1000 is improved.

In this embodiment, a second reference block 1002 is further provided on the first reference block 1001, where a plane of the second reference block 1002 is perpendicular to a plane of the first reference block 1001 (refer to fig. 8), and the second reference block 1002 is used for providing a positioning reference for the protection plate of the battery to be welded when the battery to be welded is not provided on the spot welding fixture 1000. When the second reference block 1002 follows the first reference block 1001 and is fixed on the first positioning plate 200, the second reference block 1002 is configured to cooperate with the accommodating groove 400 on the second positioning plate 300, firstly, according to the position of the second reference block 1002, the accommodating groove 400 closest to the second reference block 1002 is selected, and then the third micro head 3035 and the fourth micro head 3038 on the third sliding platform 303 are adjusted so that the second positioning plate 300 approaches the second reference block 1002 in the first direction and the second direction, so that the accommodating groove 400 closest to the second reference block 1002 on the second positioning plate 300 accommodates the second reference block 1002. After that, the first reference block 1001 and the second reference block 1002 are removed, and since the dimensions of the second reference block 1002 and the battery protection plate to be welded are known, a dimension difference between the second reference block 1002 and the protection plate in the second direction can be calculated, and then the previously calculated dimension difference between the second reference block 1002 and the protection plate in the first direction is converted into the number of turns of the rotation of the third differential head 3035 and the fourth differential head 3038 by the scales on the third differential head 3035 and the fourth differential head 3038; the required number of turns is rotated so that the second positioning plate 300 is precisely positioned in the first direction and the second direction, and finally the welded battery is placed on the first positioning plate 200. Therefore, the second positioning plate 300 and the positioning effect of the third positioning block 401 on the second positioning plate 300 on the protection plate are more accurate, the positioning precision of the spot welding fixture 1000 to the battery to be welded and the battery protection plate is higher, the protection plate is prevented from being clamped too tightly or too loosely, the protection plate is prevented from being damaged or positioned inaccurately, and the problem that the spot welding precision of the battery to be welded is lower is avoided.

Referring to fig. 6, a third sliding groove 500 is formed on the second positioning plate 300, a plurality of positioning holes 501 are formed in the third sliding groove 500 and are arranged at intervals along the first direction, a fourth positioning block 502 is further formed on the second positioning plate 300, a first elongated accommodating hole 504 extending along the first direction is formed on the fourth positioning block 502, and a third fastening member 503 is connected with the positioning hole 501 through the first accommodating hole 504.

A plurality of positioning holes 501 are arranged in the third chute 500 at intervals along the first direction, when the fourth positioning block 502 moves to the side position of the battery in the first direction, the third fastening piece 503 on the fourth positioning block 502 is matched with the positioning holes 501, so that the fourth positioning block 502 can be fixed at a required position, and the position of the battery in the first direction can be limited according to the specific size of the battery. The direction of the first accommodating hole 504 is the first direction, that is, the direction of the first accommodating hole 504 is consistent with the direction of the third chute 500 and the moving direction of the fourth positioning block 502, and the shape of the first accommodating hole 504 is a long strip, so that the fourth positioning block 502 can move in the first direction relative to the third fastening piece 503, and then after the third fastening piece 503 is matched with the positioning hole 501, the fourth positioning block 502 can be more accurately adjusted to match with the specific size and shape of the battery, the adjustable range of the fourth positioning block 502 is effectively improved, and the suitability of the spot welding fixture 1000 to batteries with different sizes is effectively improved.

It should be noted that, in the above embodiment, the first fastening member 2012, the second fastening member 2032, and the third fastening member 503 may be fastened by fastening bolts.

Referring to fig. 7, the spot welding fixture 1000 further includes a guide post 600 and a guide sleeve 700 sleeved on the guide post 600, wherein the guide post 600 is disposed on one of the bottom plate 100 or the first positioning plate 200, and the guide sleeve 700 is disposed on the other of the bottom plate 100 or the positioning plate; the spot welding jig 1000 further includes a screw 800 and an elastic member 900, the elastic member 900 is provided between the first positioning plate 200 and the bottom plate 100, and the screw 800 is threaded through the first positioning plate 200 to the bottom plate 100.

The guide post 600 and the guide sleeve 700 are elements for precisely positioning and guiding the movement of the positioning plate. Wherein the guide post 600 is a guide member disposed in the base plate 100 or the first positioning plate 200 to guide the stroke of the first positioning plate 200, and is generally cylindrical; the guide sleeve 700 is a mold fitting provided in the other of the first positioning plate 200 or the bottom plate 100 and used together with the guide post 600 to perform a guiding function. The guide post 600 and the guide sleeve 700 are matched with each other to guide the movement of the first positioning plate 200 relative to the bottom plate 100, limit the movement direction of the first positioning plate 200, and effectively improve the movement precision and stability of the first positioning plate 200.

In an alternative embodiment of the present utility model, if the guide post 600 is disposed in the first positioning plate 200, the guide sleeve 700 is disposed in the bottom plate 100, and if the guide post 600 is disposed in the bottom plate 100, the guide sleeve 700 is disposed in the first positioning plate 200. In this embodiment, a linear bearing is disposed between the guide post 600 and the guide sleeve 700, and the linear bearing is a linear motion system for use with a cylindrical shaft in a linear stroke. The bearing ball is in point contact with the bearing sleeve, and the steel ball rolls with minimum friction resistance, so that the linear bearing has small friction, is stable, does not change along with the speed of the bearing, and can obtain stable linear motion with high sensitivity and high precision.

The first positioning plate 200 is connected with the bottom plate 100 through the screw 800, the first positioning plate 200 can relatively move with the bottom plate 100, and the elastic piece 900 can provide elastic supporting force for the positioning plate in the moving process of the positioning plate relative to the bottom plate 100, namely, after the first positioning plate 200 moves in the third direction (as shown in the z direction in fig. 7) relative to the bottom plate 100, the elastic piece 900 is used for providing supporting force for the positioning plate, so that the first positioning plate 200 is stably supported at a certain height or a certain required position, the matching of the spot welding fixture 1000 to batteries with different sizes and thicknesses in the third direction is met, more batteries with different types can be more three-dimensionally and more comprehensively adapted, and the applicability of the spot welding fixture 1000 is further improved. In addition, the threaded connection is widely used detachable fixed connection and has the advantages of high connection strength, stable performance, convenience in installation and the like.

In this embodiment, the elastic member 900 is a spring, the spring is disposed in a groove on the bottom plate 100, the groove on the bottom plate 100 is not only needed to accommodate the screw 800 for threaded connection, but also a certain space needs to be reserved, and when the first positioning plate 200 moves towards the bottom plate 100, the spring is compressed to deform, so that a groove slightly larger than the diameter of the screw 800 is needed to accommodate the spring. One end of the spring is connected with the bottom of the groove, the other end of the spring is propped against the first positioning plate 200, and when the first positioning plate 200 is close to the bottom plate 100, the spring is compressed to deform and generate supporting force for the bottom plate 100 and the first positioning plate 200; when the first positioning plate 200 is far away from the bottom plate 100, the springs are restored to deform to bear against the bottom plate 100 and the first positioning plate 200 to generate supporting force. However, it should be noted that the maximum distance that the first positioning plate 200 moves relative to the bottom plate 100 in the third direction cannot exceed the maximum length of the spring in the non-pressed state, that is, the first positioning plate 200 moves relative to the bottom plate 100 cannot exceed the minimum value that the spring can elastically deform, otherwise, the spring does not provide a supporting force to the first positioning plate 200 and the bottom plate 100.

In this embodiment, the spring is disposed in the groove of the base plate 100, and can deform in the groove when the spring is pressed, so that the first positioning plate 200 is closer to the base plate 100, and the gap between the first positioning plate and the base plate is smaller, so that the moving range of the first positioning plate 200 relative to the base plate 100 is larger. Of course, the springs may be directly disposed between the base plate 100 and the first positioning plate 200, and it is only necessary to pay attention to that the minimum distance between the base plate 100 and the first positioning plate 200 cannot exceed the maximum value of the maximum deformation amount that the springs can withstand. Or, a groove is provided on the first positioning plate 200, one end of the spring abuts against the bottom plate 100, and the other end abuts against the groove top of the groove on the first positioning plate 200.

In this embodiment, the spring is a compression spring, which is a coil spring that is subjected to axial pressure, and the cross section of the material used for the compression spring is generally circular, the springs are generally of equal pitch, and there is a certain gap between the rings of the compression spring, and when the compression spring is subjected to external load, the springs contract and deform, and deformation energy is stored. In addition, the elastic member 900 may select a workpiece such as a spring plate that can be deformed by compression and provide elastic supporting force to the first positioning plate 200 and the bottom plate 100.

Of course, in the present embodiment, the adaptation of the battery to be welded in the third direction is achieved by moving the first positioning plate 200, and the adaptation of the battery to be welded in the third direction may also be achieved by moving the second positioning plate 300 in the third direction at the bottom plate 100.

It should be understood that the foregoing embodiments are merely illustrative of the technical solutions of the present utility model, and not limiting thereof, and that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art; all such modifications and substitutions are intended to be included within the scope of this disclosure as defined in the following claims.

Claims (10)

1. A spot welding fixture, comprising:

a bottom plate;

the first positioning plate is arranged on the bottom plate, a first positioning block and a second positioning block are arranged on the first positioning plate, the first positioning block is connected with the first positioning plate through a first sliding platform, and the second positioning block is connected with the first positioning plate through a second sliding platform;

the second positioning plate is arranged on the bottom plate, is adjacent to the first positioning plate, is connected with the bottom plate through a third sliding platform and is provided with a positioning assembly for pressing the nickel sheet of the protection plate and the electrode lugs of the battery cell;

the first positioning block can move along a first direction, the second positioning block can move along a second direction perpendicular to the first direction, and the second positioning plate can move in the first direction or the second direction.

2. The spot welding fixture of claim 1, wherein: the first sliding platform comprises a first base and a first connecting piece which is in sliding connection with the first base, the first base is arranged on the first positioning plate, and the first positioning block is arranged on the first connecting piece;

the first base is provided with a first supporting piece, the first connecting piece is provided with a first fixing piece, the first sliding platform further comprises a first differential head arranged on the first supporting piece, and a first telescopic rod of the first differential head is connected with the first fixing piece.

3. The spot welding fixture of claim 1, wherein: the second sliding platform comprises a second base and a second connecting piece which is in sliding connection with the second base, the second base is arranged on the first positioning plate, and the second positioning block is arranged on the second connecting piece;

the second base is provided with a second supporting piece, the second connecting piece is provided with a second fixing piece, the second sliding platform further comprises a second differential head arranged on the second supporting piece, and a second telescopic rod of the second differential head is connected with the second fixing piece.

4. The spot welding fixture of claim 1, wherein: the third sliding platform comprises a third base, a third connecting piece and a fourth connecting piece, the third connecting piece is in sliding connection with the third base, the third connecting piece moves along the first direction, and the fourth connecting piece moves along the second direction;

the third base is provided with a third supporting piece, the third connecting piece is provided with a third fixing piece, the third sliding platform further comprises a third differential head arranged on the third supporting piece, and a third telescopic rod of the third differential head is connected with the third fixing piece; the third connecting piece is provided with a fourth supporting piece, the fourth connecting piece is provided with a fourth fixing piece, the third sliding platform further comprises a fourth differential head arranged on the fourth supporting piece, and a fourth telescopic rod of the fourth differential head is connected with the fourth fixing piece.

5. The spot welding fixture of claim 2, wherein: the first positioning block is provided with a plurality of first sliding grooves and first fasteners corresponding to the first sliding grooves, the first fasteners penetrate through the first sliding grooves to be connected with the first connecting piece, and the first sliding grooves are long strips extending along the first direction.

6. A spot welding fixture as defined in claim 3, wherein: the second positioning block is provided with a plurality of second sliding grooves and second fasteners corresponding to the second sliding grooves, the second fasteners penetrate through the second sliding grooves to be connected with the second connecting piece, and the second sliding grooves are long strips extending along the second direction.

7. The spot welding fixture of claim 1, wherein: the positioning assembly comprises a rotating shaft, a pressing claw and a magnetic attraction piece, the rotating shaft is rotationally connected with the second positioning plate, the pressing claw is arranged on the rotating shaft, and the magnetic attraction piece is arranged on the second positioning plate;

wherein, the magnetism is inhaled the piece and is corresponding with the pressure claw.

8. The spot welding fixture of claim 1, wherein: the second positioning plate is provided with a plurality of containing grooves which are arranged at intervals along the first direction, and a third positioning block which is matched with the containing grooves.

9. The spot welding fixture of claim 1, wherein: the second locating plate is provided with a third sliding groove, a plurality of locating holes which are distributed along the first direction at intervals are formed in the third sliding groove, the second locating plate is also provided with a fourth locating block, and the fourth locating block is provided with a first long-strip-shaped containing hole which extends along the first direction, and a third fastener which penetrates through the first containing hole and is connected with the locating hole.

10. A spot welding fixture according to any one of claims 1-9, wherein: the spot welding fixture further comprises a guide post and a guide sleeve sleeved on the guide post, wherein the guide post is arranged on one of the bottom plate or the positioning plate, and the guide sleeve is arranged on the other one of the bottom plate or the positioning plate; the spot welding fixture further comprises a screw and an elastic piece, wherein the elastic piece is arranged between the first positioning plate and the bottom plate, and the screw penetrates through the first positioning plate to be in threaded connection with the bottom plate.