CN214921802U

CN214921802U - Battery pole piece tab shaping assembly, shaping jig and welding equipment

Info

Publication number: CN214921802U
Application number: CN202120452407.3U
Authority: CN
Inventors: 张玉玺; 平丽娜; 吕豪杰
Original assignee: Kunshan Bao Innovative Energy Technology Co Ltd
Current assignee: Kunshan Bao Innovative Energy Technology Co Ltd
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2021-11-30
Anticipated expiration: 2031-03-02

Abstract

The utility model relates to the technical field of batteries, a battery pole piece utmost point ear plastic subassembly, plastic tool and welding equipment is disclosed, battery pole piece utmost point ear plastic subassembly includes a pair of shaping piece, and one side that a pair of shaping piece was faced each other is equipped with the shaping face, and the shaping piece can press in the both sides of the pole piece utmost point ear of electric core, and the shaping face is used for carrying out the pressfitting plastic to pole piece utmost point ear. The shaping surface is a curved surface, and therefore when the shaping surface is pressed against two sides of a pole piece lug of the battery cell, the shaping surface of the curved surface is pressed on the two sides of the pole piece lug, so that the pole piece lug can be bent and deformed. Crooked pole piece utmost point ear possesses certain deformation elasticity, can avoid the fracture through the deformation of itself when receiving external force to effectively avoid electric core in the fracture problem of use pole piece utmost point ear. The shaping jig and the welding equipment with the battery pole piece and lug shaping assembly also have the advantages.

Description

Battery pole piece tab shaping assembly, shaping jig and welding equipment

Technical Field

The utility model relates to a battery technology field especially relates to a battery pole piece utmost point ear plastic subassembly, plastic tool and welding equipment.

Background

At present, after a pole lug of a lithium ion battery and a pole lug of a battery cell are welded, the pole lug is in a straight shape and does not have deformation elasticity, so that the pole lug is easy to break under the action of external force. For example, in the use process of the battery core, the pole piece tabs are broken due to vibration or pole piece expansion, so that the rapid attenuation and performance deterioration of the battery capacity are easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a battery pole piece utmost point ear plastic subassembly can carry out the plastic to pole piece utmost point ear to possess certain deformation elasticity, effectively avoid pole piece utmost point ear fracture. The utility model also provides a plastic tool and a welding equipment that has this plastic tool of this battery pole piece utmost point ear plastic subassembly.

The utility model discloses a battery pole piece pole ear plastic subassembly of first aspect embodiment, including a pair of shaping block, the shaping block can press in the both sides of the thickness direction of the pole piece pole ear of the electric core of waiting to weld; one side of the shaping blocks facing each other is provided with a shaping surface, and the shaping surface is a curved surface and is used for enabling the pole piece tabs to bend and deform.

The utility model discloses battery pole piece utmost point ear plastic subassembly of first aspect embodiment has following beneficial effect at least: a pair of shaping block can press in the both sides of the pole piece utmost point ear of electric core to through the shaping of plastic face pole piece utmost point ear, make pole piece utmost point ear bending deformation, crooked pole piece utmost point ear possesses certain deformation elasticity, can avoid the fracture through the deformation of itself when receiving external force, thereby effectively avoid the fracture problem of electric core pole piece utmost point ear in the use.

According to some embodiments of the invention, the shaping surface is an arc-shaped surface that is convex outward.

According to some embodiments of the invention, the two shaping surfaces are identical in shape.

According to some embodiments of the present invention, the distance between the shaping surfaces is gradually decreased from the proximal end to the distal end of the shaping block relative to the electric core.

The utility model discloses a battery pole piece electrode lug shaping jig of the second aspect embodiment, including the jig body and the battery pole piece electrode lug shaping component of the first aspect embodiment of the utility model, the jig body is used for fixing the electric core to be welded; the shaping component is arranged on one side of the jig body, or the shaping component is arranged on two opposite sides of the jig body respectively.

According to some embodiments of the present invention, the jig body includes a first clamping plate and a second clamping plate, and one of the shaping blocks is connected to the first clamping plate and the other shaping block is connected to the second clamping plate.

According to some embodiments of the utility model, be provided with the locating piece on the first splint and/or the second splint for the location the outer wall of electricity core.

According to some embodiments of the present invention, the first clamping plate has a rectangular structure with four sides, and the shaping block is disposed on two opposite sides of the first clamping plate, wherein: the positioning blocks are arranged on the other two sides; or the positioning blocks are arranged on two side edges on the same side with the shaping block; or the positioning blocks are arranged on the four sides of the first clamping plate.

According to some embodiments of the present invention, the second splint has a rectangular structure with four sides, and the shaping block is disposed on two opposite sides of the second splint, wherein: the positioning blocks are arranged on the other two sides; or the positioning blocks are arranged on two side edges on the same side with the shaping block; or the positioning blocks are arranged on the four sides of the second clamping plate.

The utility model discloses a welding equipment of third aspect embodiment, including the battery pole piece utmost point ear plastic tool of welding set and the embodiment of above-mentioned second aspect, battery pole piece utmost point ear plastic tool is used for the fixed electric core of treating the welding, the shaping piece is used for right the pole piece utmost point ear of electric core carries out the pressfitting plastic, welding set is used for right the pole piece utmost point ear of electric core welds.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is a front view of a battery pole piece tab shaping jig according to an embodiment of the present invention;

FIG. 2 is an exploded view of the embodiment of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 at I;

fig. 4 is a schematic diagram of a battery pole piece tab shaping jig and a to-be-welded battery cell of the embodiment shown in fig. 1;

fig. 5 is a partial schematic view illustrating the pole piece tab shaping jig of the embodiment shown in fig. 1 when shaping the pole piece tab;

fig. 6 is a side view of fig. 4.

Reference numerals:

a jig body 100, a first clamping plate 110, a second clamping plate 120, a positioning block 130, a shaping assembly 200,

shaping block 210, shaping surface 220, cell 300, pole piece tab 310, and cell tab 320.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of meanings are more than one, and the terms above, below, within and the like are understood to include the number. The description to first, second, etc. is only for the purpose of distinguishing technical features, and should not be interpreted as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Fig. 1 is the utility model discloses a battery pole piece utmost point ear plastic tool's of an embodiment elevation view, fig. 2 are the decomposition schematic diagram of the shown embodiment of fig. 1, refer to fig. 1 and fig. 2 simultaneously, the embodiment of the utility model provides a battery pole piece utmost point ear plastic tool for in battery production process, carry out the plastic to the pole piece utmost point ear of electric core. The battery pole piece lug shaping assembly comprises a pair of shaping blocks 210, one side of each pair of shaping blocks 210 facing each other is provided with a shaping surface 220, the shaping blocks 210 can be pressed against two sides of the thickness direction of a pole piece lug of a battery core, and the shaping surfaces 220 are used for performing press-fitting shaping on the pole piece lug. The shaping surface 220 is a curved surface, and therefore, when the shaping surface 220 is pressed against two sides of a pole piece tab of the battery cell, the shaping surface 220 of the curved surface is pressed on the two sides of the pole piece tab, so that the pole piece tab can be bent and deformed. Crooked pole piece utmost point ear possesses certain deformation elasticity, can avoid the fracture through the deformation of itself when receiving external force to effectively avoid electric core in the fracture problem of use pole piece utmost point ear.

Fig. 3 is a partial enlarged view of a position I in fig. 1, referring to fig. 3, in the above embodiment, the shaping surface 220 is an arc-shaped surface protruding outward, and thus, the shaping block 210 is pressed against two sides of the pole piece tab of the battery cell to shape the pole piece tab through the shaping surface 220, so that the pole piece tab is correspondingly curved and deformed in an arc shape, and thus has a certain deformation elasticity, and the arc surface has the characteristic of smoothness, so that the pole piece tab can be curved and deformed, and the surface of the pole piece tab can be effectively prevented from being crushed. The shaping surface 220 of the present embodiment may have only one arc surface, or may be an arc surface formed by a plurality of arc surfaces being connected in a smooth manner.

In specific implementation, the two shaping surfaces 220 have the same shape, so that the pole piece tabs on the two sides can be bent and deformed in the same radian. Of course, the arc shapes of the two shaping surfaces 220 may also be different, for example, the radian of the shaping surface 220 of one of the shaping blocks 210 is greater than the radian of the other shaping surface 220, at this time, the radians of the bending deformations occurring at the two sides of the pole piece tab pressed between the two shaping surfaces 220 are different, which can be adaptively set according to the actual cell structure and the processing requirements, and also can shape the pole piece tab to make it have a certain elasticity of deformation.

The distance between the two shaping surfaces 220 is gradually reduced from side to side on the two shaping blocks 210. Therefore, when the shaping assembly 200 is used, the distance between the two shaping surfaces 220 is gradually reduced from the proximal end to the distal end of the battery cell 300 on the shaping blocks 210, so that after the pair of shaping blocks 210 is pressed against the two sides of the pole piece tab 310, the shaping surfaces 220 can make the pole piece tab 310 bend from one end at the root and close together at the other end, thereby facilitating the welding of the pole piece tab and the battery cell tab 320.

The embodiment of the utility model provides a still provide a battery pole piece utmost point ear plastic tool, including the plastic subassembly 200 of tool body 100 and the arbitrary embodiment of the aforesaid, tool body 100 is used for the fixed electric core of treating welding, and plastic subassembly 200 is used for reshaping the pole piece utmost point ear 310 of being fixed in electric core 300 on tool body 100.

Fig. 4 is a schematic diagram of the battery pole piece tab shaping jig and the to-be-welded electric core in the embodiment shown in fig. 1, and fig. 5 is a partial schematic diagram of the battery pole piece tab shaping jig in the embodiment shown in fig. 1 when shaping a pole piece tab. Referring to fig. 3 to 5, in the battery pole piece tab reshaping jig of the above embodiment, the distance between the two reshaping surfaces 220 on the two reshaping blocks 210 gradually decreases from the near side to the far side of the opposite jig body 100. Therefore, the pole piece tab 310 of the battery cell 300 fixed on the jig body 100 extends from the jig body 100 to one side provided with the shaping blocks 210, and after the two shaping blocks 210 on the side are pressed against the two sides of the pole piece tab 310, the shaping surface 220 can enable the pole piece tab 310 to be bent from the near end of the jig body 100 and be closed at the far end of the jig body 100, so that the welding of the pole piece tab and the battery cell tab 320 is facilitated.

In the battery pole tab shaping jig of some embodiments, referring to fig. 4, the shaping assemblies 200 are respectively disposed on two opposite sides of the jig body 100, so that the pole tabs 310 fixed on two sides of the battery cell 300 of the jig body 100 can be shaped, thereby improving the shaping efficiency. Of course, the shaping assembly 200 may be disposed on only one side of the jig body 100 according to actual positioning and shaping requirements, so that the pole piece tab fixed to one side of the battery cell 300 of the jig body 100 may be shaped.

Referring to fig. 1 to 4, in the battery pole tab reshaping jig of the above embodiment, the jig body 100 includes a first clamping plate 110 and a second clamping plate 120, forming a split structure. One of the pair of shaping blocks 210 is connected to the first clamping plate 110, and the other shaping block 210 is connected to the second clamping plate 120, and the two shaping blocks 210 are connected to the same side of the first clamping plate 110 and the second clamping plate 120, respectively, thereby forming a pair of shaping blocks 210. The first clamping plate 110 and the second clamping plate 120 can clamp two surfaces of the to-be-welded battery cell 300 while being pressed, so that the to-be-welded battery cell 300 is fixed, and the shaping blocks 210 on the first clamping plate 110 and the second clamping plate 120 can press and shape the pole piece tabs 310 of the battery cell 30. The split jig body 100 facilitates fixing and removing the battery cell, and the shaping block 210 can be separately disposed on the first clamping plate 110 and the second clamping plate 120, so that a connecting member or mechanism of the shaping block 210 is omitted, and the jig structure is facilitated to be simplified.

During specific implementation, the jig body 100 may also be an integrated structure (not shown), wherein a cavity for accommodating the battery cell is provided, a pole tab of the battery cell extends out of the jig body 100 from the cavity, the shaping block 210 may be connected through a peripheral connecting member or mechanism, and the two can move relatively to each other to press or open, specifically, the shaping block 210 may be connected through a conventional bidirectional cylinder or other mechanism or member capable of moving the shaping block 210 relatively, and is provided at a pole tab end of the jig body 100, the shaping block 210 is located at two sides of the pole tab, after the battery cell is fixed to the jig body 100, the shaping block 210 is driven to move relatively to the two sides pressed against the pole tab, so as to enable the pole tab to bend and deform, and achieve the purpose of shaping the pole tab.

Referring to fig. 2 and 6, the orientation coordinates in the drawings are used as references for convenience of description of the embodiments, and are based only on the orientation or positional relationship shown in the drawings, and do not indicate a specific orientation limitation. In the above embodiment, the jig body 100 is provided with the plurality of positioning blocks 130 for positioning the outer wall of the battery cell, so that the positions of the tabs and the center distances of the tabs can meet the requirements, the battery cell is prevented from shifting in the welding process, and the requirements on the sizes of the center distances of the positive and negative tabs, the welding positions and the like can be accurately controlled.

The positioning block 130 may be arranged in the following manner: a positioning block 130 is arranged on the first clamping plate 110, or a positioning block 130 is arranged on the second clamping plate 120, or positioning blocks 130 are arranged on both the second clamping plate 120 and the second clamping plate 120, and are used for positioning the outer wall of the battery cell.

In the above embodiment, the first clamping plate 110 has a rectangular structure with four sides, and the two opposite sides of the first clamping plate 110 are provided with the shaping blocks 210, wherein: the positioning blocks 130 are arranged on the other two sides, and can limit the electric core 300 from the two sides; or, the positioning blocks 130 are disposed on two side edges on the same side as the shaping block 210, and can limit the electrical core 300 from the two side edges; or, the positioning blocks 130 are disposed on four sides of the first clamping plate 110, so that the outer wall of the battery cell can be limited from four sides of the battery cell 300. For example, the shaping blocks 210 are disposed on the left and right sides of the first clamping plate 110, the positioning blocks 130 can be disposed on the front and back sides, or the left and right sides of the first clamping plate 110, or the positioning blocks 130 can be disposed on the front, back, left and right sides of the first clamping plate 110. The shaping block 210 and the first clamping plate 110 may be directly connected or indirectly connected through a connecting member, or the shaping block 210 and the first clamping plate 110 may be integrally formed. The positioning block 130 and the first clamping plate 110 may be directly connected, or indirectly connected through a connecting member, or the positioning block 130 and the first clamping plate 110 are integrally formed.

Similar to the first clamping plate 110, the second clamping plate 120 may also be a rectangular structure having four sides, and two opposite sides of the second clamping plate 120 are provided with shaping blocks 210, wherein: the positioning blocks 130 are arranged on the other two sides, and can limit the electric core 300 from the two sides; or, the positioning blocks 130 are disposed on two side edges on the same side as the shaping block 210, and can limit the electrical core 300 from the two side edges; or, the positioning blocks 130 are disposed on four sides of the second clamping plate 120, so that the outer wall of the battery cell can be limited from four sides of the battery cell 300. For example, the shaping blocks 210 are disposed on the left and right sides of the second clamping plate 120, the positioning blocks 130 can be disposed on the front and back sides, or the left and right sides of the second clamping plate 120, or the positioning blocks 130 can be disposed on the front, back, left and right sides of the first clamping plate 110. The shaping block 210 and the second clamping plate 120 may be directly connected or indirectly connected through a connecting member, or the shaping block 210 and the second clamping plate 120 may be integrally formed. The positioning block 130 and the second clamping plate 120 may be directly connected or indirectly connected through a connecting member, or the positioning block 130 and the second clamping plate 120 are integrally formed.

In the above embodiment, the positioning block 130 may be disposed on one of the first clamping plate 110 and the second clamping plate 120, so as to correspondingly limit the battery cell 300 on the clamping plate side, thereby achieving a certain positioning effect. Also can all set up locating piece 130 on first splint 110 and second splint 120 to reinforcing limiting displacement, only need avoid first splint 110 and second splint 120 on locating piece 130 take place to interfere can, in order to avoid influencing the pressfitting of first splint 110 and second splint 120.

By the above, the shaping assembly for the pole lug of the battery can shape the pole lug, so that the pole lug has deformation elasticity after being welded with the pole lug of the battery cell, the problem of pole lug breakage caused by vibration or pole piece expansion in the use process of the battery cell is solved to a certain extent, and the safety and the reliability of the battery are guaranteed. The shaping jig with the shaping assembly further comprises a jig body, so that the battery cell is fixed. In addition, in some embodiments, the jig body 100 is further provided with a positioning block 130 for positioning the battery cell, so that the advantages are provided, and meanwhile, the accuracy of the center distance and the welding position of the positive and negative electrode tabs can be ensured, the accuracy of external dimensions such as the positions of the electrode tabs and the center distance of the electrode tabs is improved, and factors causing the electrode tabs to break in the use process of the battery cell can be reduced to a certain extent, thereby effectively improving the use reliability of the battery.

The embodiment of the utility model provides a welding equipment (not shown in the drawing, some contents can refer to fig. 1 to 6), including the battery pole piece utmost point ear plastic tool of welding set and the above-mentioned arbitrary embodiment, in the battery pole piece utmost point ear plastic tool, tool body 100 is arranged in the fixed electric core of treating welding, shaping block 210 is used for carrying out the pressfitting plastic to the pole piece utmost point ear of electric core, welding set is used for welding the pole piece utmost point ear of electric core, the welding equipment of this embodiment, realize the plastic and the welding of battery pole piece utmost point ear, pole piece utmost point ear has deformation elasticity with the pole piece utmost point ear after the welding of electric core utmost point ear, thereby effectively avoid electric core because of vibrations or the pole piece expansion problem of splitting of pole piece utmost point ear that arouses in the use, battery use reliability has been improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. A battery pole piece lug shaping assembly is characterized by comprising a pair of shaping blocks, wherein the shaping blocks can be pressed against two sides of a pole piece lug of a to-be-welded battery cell in the thickness direction; one side of the shaping blocks facing each other is provided with a shaping surface, and the shaping surface is a curved surface and is used for enabling the pole piece tabs to bend and deform.

2. The battery pole piece tab reshaping assembly of claim 1, wherein the reshaping surface is a convex arc surface.

3. The battery pole piece tab reforming assembly of claim 2 wherein the two reforming faces are identical in shape.

4. The battery pole piece tab shaping assembly of any one of claims 1 to 3, wherein a distance between two of the shaping faces gradually decreases from a proximal end to a distal end of the shaping block relative to the cell.

5. A shaping jig for a pole lug of a battery pole piece is characterized by comprising a jig body and the shaping assembly of any one of claims 1 to 4, wherein the jig body is used for fixing a battery cell to be welded; the shaping component is arranged on one side of the jig body, or the shaping component is arranged on two opposite sides of the jig body respectively.

6. The tool for reshaping the battery pole piece tab of claim 5, wherein the tool body comprises a first clamping plate and a second clamping plate, one reshaping block in the reshaping assembly is connected to the first clamping plate, and the other reshaping block is connected to the second clamping plate.

7. The tool of claim 6, wherein the first clamping plate and/or the second clamping plate are provided with positioning blocks for positioning the outer wall of the battery core.

8. The tool of claim 7, wherein the first clamping plate has a rectangular structure with four sides, and the shaping blocks are disposed on two opposite sides of the first clamping plate, wherein: the positioning blocks are arranged on the other two sides; or the positioning blocks are arranged on two side edges on the same side with the shaping block; or the positioning blocks are arranged on the four sides of the first clamping plate.

9. The tool of claim 7, wherein the second clamping plate has a rectangular structure with four sides, and the shaping blocks are disposed on two opposite sides of the second clamping plate, wherein: the positioning blocks are arranged on the other two sides; or the positioning blocks are arranged on two side edges on the same side with the shaping block; or the positioning blocks are arranged on the four sides of the second clamping plate.

10. Welding equipment is characterized by comprising a welding device and the battery pole piece and lug shaping jig of any one of claims 5 to 9, wherein the battery pole piece and lug shaping jig is used for fixing a battery cell to be welded, the shaping block is used for carrying out press-fitting shaping on a pole piece and lug of the battery cell, and the welding device is used for welding the pole piece and lug of the battery cell.