CN219759888U - Battery cell and battery - Google Patents
Battery cell and battery Download PDFInfo
- Publication number
- CN219759888U CN219759888U CN202320193548.7U CN202320193548U CN219759888U CN 219759888 U CN219759888 U CN 219759888U CN 202320193548 U CN202320193548 U CN 202320193548U CN 219759888 U CN219759888 U CN 219759888U
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- Prior art keywords
- pole
- cell
- top cover
- electrode assembly
- fixing part
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- 238000003466 welding Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 16
- 239000012212 insulator Substances 0.000 description 6
- 230000005611 electricity Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a battery cell and a battery, wherein the battery cell comprises: an electrode assembly including an electrode assembly body and a tab extending from the electrode assembly body; the top cover assembly comprises a top cover body and a pole arranged on the top cover body; the electric connecting piece is connected with the electrode lug and the electrode post and is provided with a connecting hole; the pole is provided with a pole body and a fixing part, the fixing part extends from the bottom of the pole body, and the fixing part penetrates through the connecting hole, bends towards the side part of the electric connecting sheet and is fixed at the bottom of the electric connecting sheet. The cell comprises an electrode assembly, a top cover assembly and an electric connecting sheet, wherein a pole is arranged on the top cover assembly, a pole lug is arranged on the electrode assembly, a fixing part on the pole lug is connected with the electric connecting sheet in a riveting mode through bending, the mechanical internal resistance is reduced, the current carrying capacity of the structure is improved, the electric connecting sheet and the pole lug are arranged to be of a split structure, dislocation tolerance between the pole lug and the pole lug is larger, and automatic assembly of the electric connecting sheet and the pole lug is easy.
Description
Technical Field
The present disclosure relates to batteries, and particularly to a battery cell and a battery.
Background
At present, a part of square shell battery core adopts a butterfly welding assembly structure, and the battery core and the pole are electrically connected in a mode of a switching piece. Be provided with the utmost point ear on the electric core, the changeover piece contains utmost point post connecting region and utmost point ear connecting region, and utmost point ear connecting region is connected with utmost point ear electricity, and the whole after the assembly is connected with utmost point post electricity through utmost point post connecting region, accomplishes the assembly at last. The connecting mode is complex in assembly procedure, and the adapter piece is firstly electrically connected with the lug of the battery cell and then is connected onto the pole column in a transferring mode, and is fixed in a welding mode. Among them, in the case of electrical connection of the tab and the post, extremely high positional displacement (in the height direction and the width direction) is required for the tab. If the dislocation of the polar lug is larger, the polar column connecting area is shielded, the polar column connecting operation is affected, and even the connection cannot be realized. Meanwhile, the welding process can cause larger thermal influence on the pole, and the sealing and insulating reliability of the pole is reduced. The other part of the battery cells adopts a connection mode that the pole is free of a rotating sheet, a large bottom plate is formed on the bottom surface of the pole, and the pole lugs of the battery cells are directly electrically connected with the large bottom plate below the pole. However, the pole bottom surface forms integrated into one piece's big bottom plate, and the degree of difficulty is high, and the processing degree of difficulty is big, and the reliability is poor, and is with high costs to because the problem of processing degree of difficulty, the wall thickness of general bottom plate is great, leads to structure weight big, influences the energy density of electric core.
Disclosure of Invention
The utility model aims to overcome the defects of difficult assembly and poor connection effect of a battery cell and a switching piece in the prior art, and provides the battery cell and a battery.
The utility model solves the technical problems by the following technical scheme:
a battery cell, the battery cell comprising:
an electrode assembly including an electrode assembly body and a tab extending from the electrode assembly body;
the top cover assembly comprises a top cover body and a pole arranged on the top cover body;
the electric connection sheet is connected with the electrode lug and the electrode post and is provided with a connection hole;
the pole is provided with a pole body and a fixing part, the fixing part extends from the bottom of the pole body, and the fixing part penetrates through the connecting hole, bends towards the side part of the electric connecting sheet and is fixed at the bottom of the electric connecting sheet.
In this scheme, this electric core includes electrode assembly, top cap subassembly and electric connection piece, is provided with the utmost point post on the top cap subassembly, is provided with the utmost point ear on the electrode assembly, and electric connection piece is with utmost point ear electricity connection in the utmost point post. Specifically, fixed part on the utmost point post is through buckling, with utmost point post and electric connection piece riveting connection, be favorable to reducing mechanical internal resistance, promote structural current-carrying capacity, and, set up electric connection piece and utmost point post into split structure, can be bigger to the dislocation tolerance between utmost point ear and the utmost point post, application scope is wider, also easily the automated assembly of electric connection piece and utmost point post, simultaneously, split structure's electric connection piece and utmost point post, still reducible electric connection piece and the integrative assembly degree of difficulty that sets up of utmost point post, also reduce structural member cost, and can reduce the weight of electric core.
Preferably, the fixing portion extends from a bottom periphery of the pole body.
In this scheme, adopt above-mentioned structure setting, the one end and the top cap body coupling of the utmost point post of being convenient for, the other end and the electric connection piece of utmost point post are connected, also be convenient for fixed with the electric connection piece after the fixed part is buckled, improve connection effect.
Preferably, a plurality of fixing parts extend from the outer circumferential surface of the bottom of the pole body at intervals;
or, the fixing part is an annular flange extending from the outer circumferential surface of the bottom of the pole body.
In this scheme, compare with single fixed part, a plurality of fixed parts can improve the fixed effect of utmost point post and electric connection piece. The fixed part of annular flange can encircle the connecting hole and be connected with the electric connection piece, compares with the fixed part that the separation set up, and its is fixed and electric connection effect is all better.
Preferably, the bottom of the electric connection piece and one side close to the connection hole are further provided with a protruding buckling part, and the fixing part wraps the buckling part.
In this scheme, fixed part cladding lock joint portion prevents that utmost point post and electric connection piece from separating, improves the riveting effect of utmost point post and electric connection piece.
Preferably, the number of the fastening parts is at least two, and at least two fastening parts are arranged at the edge of the connecting hole at intervals.
In this scheme, a plurality of buckling parts can realize the connection of fixed part and buckling part from a plurality of positions, improves the fixed effect of utmost point post and electric connection piece.
Preferably, the fastening part is an annular flanging which is annularly arranged at the edge of the connecting hole.
In this scheme, the annular turn-ups can encircle the connecting hole and be connected with fixed part, compares with the lock joint portion that the separation set up, and electric connection and fixed effect are all better.
Preferably, the electric connection piece is provided with a welding area and a non-welding area, the thickness of the welding area is larger than that of the non-welding area, and the welding area is used for being welded with the tab.
In this scheme, the thickness of non-welding district is less than the thickness of welding district, can alleviate the weight of electric connection piece, also can increase the inner space of electric core, improves the energy density of electric core.
Preferably, the electric connection piece is provided with two welding areas, and the two welding areas are symmetrically arranged relative to the connection hole.
In this scheme, adopt above-mentioned structure setting, be convenient for connect the utmost point ear of two electrode assemblies that symmetry set up on the electric connection piece for the structure of electric core is regular, is convenient for pile up a plurality of electric cores of equipment.
Preferably, the materials of the electric connection sheet and the polar post are the same.
In this scheme, the material of electric connection piece and utmost point post is the same, improves the electric connection effect. Preferably, when the pole is an anode, the electric connection piece and the pole are both made of aluminum. When the pole is a negative electrode, the materials of the electric connection sheet and the pole are copper.
A battery comprising a cell as described above.
In this scheme, this battery includes above-mentioned electric core, because the utmost point post of electric core and electric connection piece are two parts that the components of a whole that can function independently set up and through the riveting, realize quick connect, can be bigger to the dislocation tolerance between utmost point ear and the utmost point post, still can reduce the assembly degree of difficulty that electric connection piece and utmost point post set up integratively, improve the assembly speed of utmost point post and electric connection piece, reduce the structure cost, reduce the weight of electric core.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the utility model.
The utility model has the positive progress effects that: the battery cell comprises an electrode assembly, a top cover assembly and an electric connecting sheet, wherein a pole is arranged on the top cover assembly, a pole lug is arranged on the electrode assembly, and the electric connecting sheet is used for electrically connecting the pole lug with the pole lug. Specifically, fixed part on the utmost point post is through buckling, with utmost point post and electric connection piece riveting connection, be favorable to reducing mechanical internal resistance, promote structural current-carrying capacity, and, set up electric connection piece and utmost point post into split structure, can be bigger to the dislocation tolerance between utmost point ear and the utmost point post, application scope is wider, also easily the automated assembly of electric connection piece and utmost point post, simultaneously, split structure's electric connection piece and utmost point post, still reducible electric connection piece and the integrative assembly degree of difficulty that sets up of utmost point post, also reduce structural member cost, and can reduce the weight of electric core.
Drawings
Fig. 1 is a schematic structural diagram (a) of a battery cell according to a preferred embodiment of the utility model.
Fig. 2 is a schematic structural diagram of a battery cell according to a preferred embodiment of the utility model (ii).
Fig. 3 is an exploded view of a top cap assembly according to a preferred embodiment of the present utility model.
Fig. 4 is a cross-sectional view of a cap assembly (before staking of the post and electrical connection pads) according to a preferred embodiment of the present utility model.
Fig. 5 is a cross-sectional view of a cap assembly (after staking of the post and the electrical connection pads) according to a preferred embodiment of the present utility model.
Fig. 6 is a cross-sectional view of an electrode assembly and a cap assembly according to a preferred embodiment of the present utility model.
Fig. 7 is a schematic structural view of an electrical connection sheet according to a preferred embodiment of the present utility model.
Reference numerals illustrate:
electrode assembly 1
Top cover assembly 2
Top cover body 21
Rivet 211
Upper insulator 212
Cover plate 213
Seal 214
Lower insulator 215
Pole 22
Pole body 221
Fixing portion 222
Electric connecting piece 3
Bonding area 3a
Non-welding area 3b
Connection hole 31
Fastening portion 32
Detailed Description
The utility model will now be more fully described by way of example only and with reference to the accompanying drawings, but the utility model is not thereby limited to the scope of the examples described.
As shown in fig. 1 to 7, the present embodiment discloses a battery cell, which includes an electrode assembly 1, a top cap assembly 2 and an electrical connection sheet 3, wherein the electrode assembly 1 includes an electrode assembly body and a tab (not shown) extending from the electrode assembly body, the top cap assembly 2 includes a top cap body 21 and a tab 22 disposed on the top cap body 21, and the electrical connection sheet 3 connects the tab and the tab 22. The electric connection piece 3 has a connection hole 31, the post 22 has a post body 221 and a fixing portion 222, the fixing portion 222 extends from the bottom of the post body 221, and the fixing portion 222 passes through the connection hole 31, is bent toward the side of the electric connection piece 3, and is fixed to the bottom of the electric connection piece 3.
In this embodiment, the battery cell includes an electrode assembly 1, a top cap assembly 2, and an electrical connection sheet 3, a pole 22 is disposed on the top cap assembly 2, a tab is disposed on the electrode assembly 1, and the electrical connection sheet 3 electrically connects the tab to the pole 22. Specifically, the fixing portion 222 on the pole 22 is bent to rivet the pole 22 with the electric connection piece 3, so that the mechanical internal resistance is reduced, the current carrying capacity of the structure is improved, the electric connection piece 3 and the pole 22 are arranged to be of a split structure, the dislocation tolerance between the pole lug and the pole 22 is larger, the application range is wider, the automatic assembly of the electric connection piece 3 and the pole 22 is easy, meanwhile, the assembly difficulty of the electric connection piece 3 and the pole 22 of the split structure can be reduced, the structural member cost is reduced, and the weight of the battery core can be reduced.
As shown in fig. 3-5, one end of the pole 22 is connected with the top cover body 21, the other end of the pole 22 is connected with the electric connection piece 3, and the fixing portion 222 extends from the bottom periphery of the pole body 221, so that the fixing portion 222 is convenient to be fixed with the electric connection piece 3 after being bent, and the connection effect is improved.
In the present embodiment, the fixing portion 222 is an annular flange extending from the bottom outer peripheral surface of the pole body 221. The fixing portion 222 of the annular flange can be connected with the electric connection piece 3 around the connection hole 31, and compared with the fixing portion 222 which is separately arranged, the fixing and electric connection effects are better.
In other embodiments, the plurality of fixing portions extend from the bottom outer circumferential surface of the pole body at intervals. Compared with a single fixing part, the fixing effect of the pole and the electric connecting sheet can be improved through the fixing parts.
As shown in fig. 4-6, in the present embodiment, the bottom of the electric connection piece 3 and the side close to the connection hole 31 are further provided with a protruding fastening portion 32, and the fastening portion 32 is covered by the fixing portion 222, so as to prevent the pole 22 from being separated from the electric connection piece 3, and improve the riveting effect of the pole 22 and the electric connection piece 3.
In this embodiment, the fastening portion 32 is an annular flange that is annularly disposed at the edge of the connecting hole 31, and the annular flange can be connected with the fixing portion 222 around the connecting hole 31, so that the electrical connection and fixing effects are better than those of the fastening portion 32 that is separately disposed.
In other embodiments, the number of the fastening portions is at least two, and the at least two fastening portions are disposed at intervals at the edge of the connecting hole. The plurality of buckling parts can realize the connection of the fixing part and the buckling parts from a plurality of directions, and the fixing effect of the pole and the electric connecting sheet is improved.
As shown in fig. 7, in the present embodiment, the electric connection sheet 3 has a land 3a and a non-land 3b, the land 3a being for welding with the tab of the electrode assembly 1.
In one embodiment, the thickness of the welding area 3a can be increased, so that the situation that the electric connection sheet is welded through or cracked when being welded with the tab can be avoided, and the welding strength of the welding area is improved.
In another embodiment, the thickness of the non-soldering region 3b may be reduced, the weight of the electrical connection pad 3 may be reduced, the internal space of the cell may be increased, and the energy density of the cell may be increased.
As shown in fig. 7, in the present embodiment, two welding areas 3a are disposed on the electric connection piece 3, and the two welding areas 3a are symmetrically disposed with respect to the connection hole 31, so that the tabs of the two symmetrically disposed electrode assemblies 1 are conveniently connected to the electric connection piece 3, so that the structure of the electric core is regular, and a plurality of electric cores are conveniently stacked and assembled.
In other embodiments, the number of the welding areas may be more than two according to the needs of the user.
In this embodiment, in order to improve the electrical connection effect, the material of the electrical connection piece 3 and the pole 22 are the same. Preferably, when the pole 22 is an anode, the materials of the electric connection piece 3 and the pole 22 are aluminum. When the electrode post 22 is a negative electrode, the materials of the electric connection piece 3 and the electrode post 22 are copper. Of course, in other embodiments, different materials of the electrical connection piece and the pole can be used.
As shown in fig. 3 to 6, in the present embodiment, the top cover body 21 includes a rivet 211, an upper insulator 212, a cover plate 213, a seal 214, and a lower insulator 215, and the pole 22 is fixed to the cover plate 213 by the rivet 211, the upper insulator 212, the seal 214, and the lower insulator 215. The electrode assembly body comprises a winding core and a tab arranged on the winding core.
The embodiment also discloses a battery, which comprises the battery cell. Because the pole 22 and the electric connection piece 3 of the battery core are two components which are arranged in a split mode and are riveted, quick connection is achieved, dislocation tolerance between the pole lug and the pole 22 is larger, assembly difficulty of the electric connection piece 3 and the pole 22 which are integrally arranged can be reduced, assembly speed of the pole 22 and the electric connection piece 3 is improved, structural member cost is reduced, and weight of the battery core is reduced.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.
Claims (10)
1. A battery cell, wherein the battery cell comprises:
an electrode assembly including an electrode assembly body and a tab extending from the electrode assembly body;
the top cover assembly comprises a top cover body and a pole arranged on the top cover body;
the electric connection sheet is connected with the electrode lug and the electrode post and is provided with a connection hole;
the pole is provided with a pole body and a fixing part, the fixing part extends from the bottom of the pole body, and the fixing part penetrates through the connecting hole, bends towards the side part of the electric connecting sheet and is fixed at the bottom of the electric connecting sheet.
2. The cell of claim 1, wherein the securing portion extends from a bottom periphery of the terminal body.
3. The cell of claim 2, wherein a plurality of the fixing portions are extended from the outer circumferential surface of the bottom of the pole body at intervals;
or, the fixing part is an annular flange extending from the outer circumferential surface of the bottom of the pole body.
4. The cell of claim 1, wherein the bottom of the electrical connection piece and a side near the connection hole further have a protruding fastening portion, and the fixing portion wraps the fastening portion.
5. The battery cell of claim 4, wherein the number of the fastening portions is at least two, and at least two fastening portions are disposed at intervals at the edge of the connection hole.
6. The cell of claim 4, wherein the fastening portion is an annular flange disposed around an edge of the connection hole.
7. The cell of claim 1, wherein the electrical connection tab has a weld region and a non-weld region, the weld region having a thickness greater than a thickness of the non-weld region, the weld region being for welding with the tab.
8. The cell of claim 7, wherein two of said lands are disposed on said electrical connection pad, and wherein two of said lands are disposed symmetrically with respect to said connection aperture.
9. The cell of any of claims 1-8, wherein the electrical connection tab and the post are the same material.
10. A battery, characterized in that it comprises a cell according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320193548.7U CN219759888U (en) | 2023-02-13 | 2023-02-13 | Battery cell and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320193548.7U CN219759888U (en) | 2023-02-13 | 2023-02-13 | Battery cell and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219759888U true CN219759888U (en) | 2023-09-26 |
Family
ID=88069993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320193548.7U Active CN219759888U (en) | 2023-02-13 | 2023-02-13 | Battery cell and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219759888U (en) |
-
2023
- 2023-02-13 CN CN202320193548.7U patent/CN219759888U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |