CN219832953U - Negative electrode switching piece and battery cover plate - Google Patents
Negative electrode switching piece and battery cover plate Download PDFInfo
- Publication number
- CN219832953U CN219832953U CN202320247046.8U CN202320247046U CN219832953U CN 219832953 U CN219832953 U CN 219832953U CN 202320247046 U CN202320247046 U CN 202320247046U CN 219832953 U CN219832953 U CN 219832953U
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- Prior art keywords
- conducting plate
- negative electrode
- plate
- conductive plate
- electrode tab
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 239000010949 copper Substances 0.000 claims abstract description 14
- 230000002787 reinforcement Effects 0.000 claims 2
- 239000000463 material Substances 0.000 description 9
- 238000003466 welding Methods 0.000 description 8
- 210000001503 joint Anatomy 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a negative electrode switching piece, which comprises a first conducting plate and a second conducting plate, wherein the first conducting plate is made of aluminum, and the second conducting plate is made of copper; the first conducting plate is provided with a bulge and/or a clamping groove, the second conducting plate is provided with a clamping groove and/or a bulge, and the first conducting plate is electrically connected with the second conducting plate through the clamping fit of the bulge and the clamping groove. According to the utility model, the first conducting plate and the second conducting plate are provided with the bulges and the clamping grooves, and the first conducting plate and the second conducting plate can be electrically connected by utilizing the clamping connection of the bulges and the clamping grooves, so that the fixing firmness degree of the first conducting plate and the second conducting plate is ensured, and the processing efficiency of the negative electrode switching sheet is improved.
Description
Technical Field
The utility model relates to the technical field of switching pieces, in particular to a negative electrode switching piece and a battery cover plate.
Background
When the battery cover plate is assembled, the lug and the switching piece are connected in an ultrasonic welding mode, then the switching piece is connected with the pole column of the cover plate in a laser welding mode, so that the conduction between the battery core and the pole column is realized, but because the positive pole lug is usually aluminum foil and the negative pole lug is usually copper foil, in order to ensure consistency of welding materials, the negative pole column is required to be made into a copper-aluminum composite pole column, and then the negative pole column is connected with the negative pole switching piece and the negative pole lug which are made of copper in a welding mode, so that the production cost of the pole column is increased, the weight of a top cover is increased, and the use of the battery is influenced.
The utility model of the prior publication number CN217881800U discloses a negative electrode switching piece, and the surface of an aluminum connecting part is provided with a copper connecting part, so that the negative electrode switching piece is provided with copper and aluminum materials simultaneously, the copper material welding of a negative electrode lug and an aluminum negative electrode pole can be realized, the cost of the pole can be reduced, and the weight of a top cover can be reduced.
In the technical scheme, three connection modes are provided for the combination of the copper connection part and the aluminum connection part, namely the modes of spraying, friction welding and riveting of riveting pieces, the fixing firmness of the spraying connection mode is relatively poor, and the layering phenomenon of two materials is easy to occur; the friction welding mode has a complex processing technology, and the processing efficiency of the cathode switching sheet can be reduced; the riveting mode through the riveting piece still needs to use extra riveting work piece, not only can reduce the machining efficiency of change piece, still leads to the fact the influence to the conductivity of change piece easily, and does not set up the circumstances that copper connecting portion and aluminium connecting portion take place the separation easily in the position of riveting piece, influences the conductive properties of negative pole change piece.
Disclosure of Invention
In view of the above, the present utility model provides a negative electrode tab and a battery cover plate, which can firmly connect a first conductive plate and a second conductive plate together rapidly, so as to improve the processing efficiency of the negative electrode tab.
The technical scheme of the utility model is realized as follows: in one aspect, the present utility model provides a negative electrode tab comprising a first conductive plate and a second conductive plate, wherein,
the first conducting plate is made of aluminum, and the second conducting plate is made of copper;
the first conducting plate is provided with a bulge and/or a clamping groove, the second conducting plate is provided with a clamping groove and/or a bulge, and the first conducting plate is electrically connected with the second conducting plate through the clamping fit of the bulge and the clamping groove.
On the basis of the above technical solution, preferably, the second conductive plate is disposed at one side of the first conductive plate.
Still further preferably, the protrusion is integrally disposed on a side of the first conductive plate, which is close to the second conductive plate, and the slot is formed on a side of the second conductive plate, which is close to the first conductive plate.
Still more preferably, the protrusion is a strip structure with a trapezoid end surface, and the clamping groove is a dovetail groove structure.
Still more preferably, the number of the protrusions and the number of the card slots are 1 or more.
On the basis of the above technical solution, preferably, the second conductive plate is disposed at one end of the first conductive plate.
Still more preferably, the connection end surfaces of the first conductive plate and the second conductive plate are both stepped.
Still more preferably, the protrusion is integrally disposed at one end of the first conductive plate near the second conductive plate, and the protrusion has a strip structure with a trapezoidal end surface; the clamping groove is formed in one end, close to the first conducting plate, of the second conducting plate, and is of a dovetail groove-shaped structure.
Still further preferably, a hooking portion is integrally disposed at one end of the first conducting plate, which is close to the second conducting plate, a reinforcing groove is formed at one end of the second conducting plate, which is close to the first conducting plate, and the hooking portion is clamped with the reinforcing groove.
In a second aspect, the present utility model provides a battery cover plate, including the above-described negative electrode tab.
Compared with the prior art, the negative electrode switching sheet and the battery cover plate have the following beneficial effects:
(1) The first conducting plate and the second conducting plate are electrically connected by arranging the bulges and the clamping grooves on the first conducting plate and the second conducting plate and clamping the bulges and the clamping grooves, so that the fixing firmness degree of the first conducting plate and the second conducting plate is ensured, and the processing efficiency of the cathode switching sheet is improved;
(2) By arranging two different connection modes, the first conducting plate and the second conducting plate can be in up-and-down butt joint or left-and-right butt joint according to actual needs, so that the application range of the negative electrode switching sheet is improved;
(3) Through setting the second conduction plate to the copper material the same with the negative pole utmost point ear, set up first conduction plate to the aluminium material the same with the negative pole utmost point post, not only can guarantee welding material's uniformity, still alleviateed the weight of negative pole utmost point post, ensured the normal use of battery.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a perspective view of a first conductive plate and a second conductive plate of a negative electrode tab of the present utility model in a vertically butted mode;
FIG. 2 is a cross-sectional view of a negative electrode tab of the present utility model at A in FIG. 1;
fig. 3 is a perspective view of a first conductive plate and a second conductive plate of a negative electrode tab according to the present utility model;
FIG. 4 is a cross-sectional view of a negative electrode tab of the utility model at B in FIG. 3;
fig. 5 is a perspective view of a battery cover plate according to the present utility model.
Wherein: 1. a first conductive plate; 2. a second conductive plate; 11. a protrusion; 12. a hooking part; 101. a clamping groove; 102. and a reinforcing groove.
Detailed Description
The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.
As shown in fig. 5, a battery cover plate of the present utility model includes a negative electrode tab.
The negative electrode transfer piece plays a role in connecting the negative electrode tab and the negative electrode post, and as shown in fig. 1-4, the negative electrode transfer piece comprises a first conducting plate 1 and a second conducting plate 2.
The first conducting plate 1 is made of aluminum and is used for being electrically connected with a negative electrode post made of aluminum, and the second conducting plate 2 is made of copper and is used for being connected with a negative electrode lug made of copper; the first conducting plate 1 is provided with a bulge 11 and/or a clamping groove 101, the second conducting plate 2 is provided with a clamping groove 101 and/or a bulge 11, and the first conducting plate 1 and the second conducting plate 2 are electrically connected with the clamping groove 101 through the clamping fit of the bulge 11, so that the electric connection between the negative electrode tab and the negative electrode post is realized; the cathode switching piece is of a copper and aluminum composite structure, so that the first conducting plate 1 and the cathode pole are made of the same material, the second conducting plate 2 is made of the same material as the cathode pole lug, the cathode pole is not required to be made of a copper and aluminum composite material, the production cost of the cathode pole is reduced, the weight of the cathode pole is reduced, and the normal use of the battery is ensured; in addition, the connection mode of the clamping connection between the bulge 11 and the clamping groove 101 is utilized, the operation is simple and convenient, the connection strength of the first conducting plate 1 and the second conducting plate 2 can be ensured, and the processing efficiency of the cathode switching sheet can be improved.
For the combination mode of the first conducting plate 1 and the second conducting plate 2, the utility model provides two connecting structures:
the first is vertically butt joint type, the second conducting plate 2 is arranged on one side of the first conducting plate 1, namely, the cathode switching sheet is arranged into a two-layer structure formed by combining the first conducting plate 1 and the second conducting plate 2 in the thickness direction, as shown in fig. 1, the upper side of the first conducting plate 1 is connected with a cathode pole, the second conducting plate 2 is arranged on the lower side of the first conducting plate 1, and the lower side of the second conducting plate 2 is connected with a cathode pole lug; as a preferred embodiment, the protrusion 11 may be integrally disposed on one side of the first conductive plate 1 near the second conductive plate 2, the clamping groove 101 is formed on one side of the second conductive plate 2 near the first conductive plate 1, when the negative electrode switching piece is processed, the protrusion 11 on the first conductive plate 1 corresponds to the clamping groove 101 on the second conductive plate 2, and then the first conductive plate 1 and the second conductive plate 2 are pressed by using a pressing device, so that the first conductive plate 1 and the second conductive plate 2 are fixed; specifically, as shown in fig. 2, the protrusion 11 may be configured as a strip structure with a trapezoidal end surface, the clamping groove 101 may be configured as a dovetail groove structure, and the protrusion 11 with a trapezoidal end surface is pressed into the clamping groove 101 with a dovetail groove shape, so that the separation phenomenon does not occur; furthermore, in this connection structure, since the contact surface between the first conductive plate 1 and the second conductive plate 2 is larger, in order to improve the fixing firmness of the first conductive plate 1 and the second conductive plate 2, more than 1 protrusion 11 and the clamping groove 101 can be provided, and preferably, a plurality of protrusions 11 and the clamping groove 101 are uniformly arranged, so that the connection between the first conductive plate 1 and the second conductive plate 2 is more uniform.
The second type is a left-right butt joint type, the second conducting plate 2 is arranged at one end of the first conducting plate 1, namely, the negative electrode switching sheet is arranged into a two-section structure formed by combining the first conducting plate 1 and the second conducting plate 2 in the length direction, as shown in fig. 3, one section of the first conducting plate 1 on the negative electrode switching sheet is connected with a negative electrode pole, and one section of the second conducting plate 2 on the negative electrode switching sheet is connected with a negative electrode pole lug; in this connection structure, since the contact surface of the first conductive plate 1 and the second conductive plate 2 is small, the arrangement of the protrusion 11 and the card slot 101 on the first conductive plate 1 or the second conductive plate 2 is limited, in order to solve this problem, the connection end surfaces of the first conductive plate 1 and the second conductive plate 2 may be stepped, so as to increase the contact area of the first conductive plate 1 and the second conductive plate 2; as a preferred embodiment, the protrusion 11 may be integrally disposed at one end of the first conductive plate 1 near the second conductive plate 2, the protrusion 11 is preferably disposed in a strip structure with a trapezoidal end surface, correspondingly, the clamping groove 101 is formed at one end of the second conductive plate 2 near the first conductive plate 1, the clamping groove 101 is preferably disposed in a dovetail structure, and as shown in fig. 4, when the first conductive plate 1 and the second conductive plate 2 are butted, the protrusion 11 with a trapezoidal end surface is pressed into the dovetail-shaped clamping groove 101 by using a pressure device; further, because the contact surface of the first conductive plate 1 and the second conductive plate 2 is smaller, the problem that the firmness of the first conductive plate 1 and the second conductive plate 2 is relatively weak can be caused, therefore, the hooking portion 12 can be integrally arranged at one end of the first conductive plate 1, which is close to the second conductive plate 2, the reinforcing groove 102 is formed at one end of the second conductive plate 2, which is close to the first conductive plate 1, and the hooking portion 12 is clamped with the reinforcing groove 102, as shown in fig. 4, the clamping of the hooking portion 12 and the reinforcing groove 102 can effectively resist the tensile force of the first conductive plate 1 and the second conductive plate 2 in the butt joint direction, and the clamping degree of the matching protrusion 11 and the clamping groove 101 is greatly improved.
The application method of the negative electrode switching sheet and the battery cover plate comprises the following steps:
firstly, according to the type of the power battery, the upper and lower butt joint type negative electrode connecting sheets or the left and right butt joint type negative electrode connecting sheets are selected to be used, then the first conducting plate 1 and the negative electrode pole are welded and conducted, and finally the second conducting plate 2 and the negative electrode lug are welded and conducted, so that the connection between the negative electrode pole on the battery cover plate and the negative electrode lug can be realized.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A negative electrode tab, characterized by: comprises a first conducting plate and a second conducting plate, wherein,
the first conducting plate is made of aluminum, and the second conducting plate is made of copper;
the first conducting plate is provided with a bulge and/or a clamping groove, the second conducting plate is provided with a clamping groove and/or a bulge, and the first conducting plate is electrically connected with the second conducting plate through the clamping fit of the bulge and the clamping groove.
2. A negative electrode tab according to claim 1, wherein: the second conducting plate is arranged on one side of the first conducting plate.
3. A negative electrode tab according to claim 2, wherein: the protrusion is integrally arranged on one side of the first conducting plate, which is close to the second conducting plate, and the clamping groove is formed in one side of the second conducting plate, which is close to the first conducting plate.
4. A negative electrode tab according to any one of claims 1 to 3, wherein: the bulges are of a strip-shaped structure with trapezoidal end faces, and the clamping grooves are of a dovetail groove-shaped structure.
5. The negative electrode tab of claim 4, wherein: more than 1 protrusion and more than 1 clamping groove are arranged.
6. A negative electrode tab according to claim 1, wherein: the second conducting plate is arranged at one end of the first conducting plate.
7. The negative electrode tab of claim 6, wherein: the connecting end surfaces of the first conducting plate and the second conducting plate are all in a ladder shape.
8. A negative electrode tab according to any one of claims 1, 6 to 7, wherein: the protrusion is integrally arranged at one end of the first conducting plate, which is close to the second conducting plate, and is of a strip-shaped structure with a trapezoid end face; the clamping groove is formed in one end, close to the first conducting plate, of the second conducting plate, and is of a dovetail groove-shaped structure.
9. The negative electrode tab of claim 8, wherein: the first conduction plate is close to one end integral type of second conduction plate is provided with and colludes the portion that links, the second conduction plate is close to one end of first conduction plate has seted up the reinforcement groove, just colludes the portion with the joint of reinforcement groove.
10. A battery cover plate, characterized in that: comprising the negative electrode tab of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320247046.8U CN219832953U (en) | 2023-02-15 | 2023-02-15 | Negative electrode switching piece and battery cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320247046.8U CN219832953U (en) | 2023-02-15 | 2023-02-15 | Negative electrode switching piece and battery cover plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219832953U true CN219832953U (en) | 2023-10-13 |
Family
ID=88277422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320247046.8U Active CN219832953U (en) | 2023-02-15 | 2023-02-15 | Negative electrode switching piece and battery cover plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219832953U (en) |
-
2023
- 2023-02-15 CN CN202320247046.8U patent/CN219832953U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |