CN219163660U - Battery cell - Google Patents
Battery cell Download PDFInfo
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- CN219163660U CN219163660U CN202320117206.7U CN202320117206U CN219163660U CN 219163660 U CN219163660 U CN 219163660U CN 202320117206 U CN202320117206 U CN 202320117206U CN 219163660 U CN219163660 U CN 219163660U
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- tab
- electrode
- electrode assembly
- connecting portion
- face
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a battery cell, comprising: a housing; the electrode assembly is arranged in the shell and comprises an electrode body and a tab extending from the electrode body; the top cover assembly comprises a top cover body and an electrode terminal arranged on the top cover body, and the top cover body is connected with the shell; a lead member including a terminal connection part connected with the electrode terminal and a tab guide part connected with the tab, the terminal connection part being connected with the tab guide part; and an insulating member disposed between the tab guide portion and the electrode assembly. The insulation piece is arranged between the tab guide part and the electrode assembly, so that the contact between the pin and the battery core can be prevented when the battery core vibrates violently in the actual use process, and the potential safety hazard caused by short circuit is avoided.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to an electric core.
Background
The square battery cell needs to weld the positive electrode pin and the positive electrode lug together, and the negative electrode pin and the negative electrode lug are welded together to form electric connection at the positive electrode and the negative electrode respectively, wherein the positive electrode pin and the negative electrode pin are welded with the positive electrode post and the negative electrode post on the cover plate respectively and extend downwards to two sides of the battery cell, and the positive electrode lug and the negative electrode lug on two sides of the battery cell are connected with the positive electrode pin and the negative electrode pin respectively. In order to avoid the risk of thermal runaway caused by short circuit due to contact between the pins and other parts of the battery core, the pins and the battery core are arranged at intervals at present, namely, the pins and the battery core are kept in a separated state by utilizing a gap. However, in the practical use process, the battery cell can vibrate, and when the pin and the battery cell shake, the pin and the battery cell can be in contact with each other to cause potential safety hazards. In addition, in the vibration process, the lug is welded with the pin together, so that the lug receives larger acting force and is easy to break.
Disclosure of Invention
The utility model aims to overcome the defect that in the prior art, when a battery shakes, a pin and a battery cell are easy to generate short circuit risks.
The utility model solves the technical problems by the following technical scheme:
a battery cell, comprising: a housing; the electrode assembly is arranged in the shell and comprises an electrode body and a tab extending from the electrode body; the top cover assembly comprises a top cover body and an electrode terminal arranged on the top cover body, and the top cover body is connected with the shell; a lead member including a terminal connection part connected with the electrode terminal and a tab guide part connected with the tab, the terminal connection part being connected with the tab guide part; and an insulating member disposed between the tab guide portion and the electrode assembly.
In this scheme, adopt above-mentioned structural style, electrode assembly sets up in the casing, can avoid outside debris to impale, plays the guard action to electrode assembly, in addition, top cap body coupling is on the casing, and the guard effect is better. The tab that the electrode body extends is connected with the tab guide portion of pin part, and the terminal connecting portion of pin part is connected with the electrode terminal of top cap subassembly simultaneously, and the pin part can guide the electric quantity of electrode subassembly to top cap subassembly department promptly, and then carries to outside. The insulation piece is arranged between the tab guide part and the electrode assembly, so that the contact between the pin and the battery core can be prevented when the battery core vibrates violently in the actual use process, and the potential safety hazard caused by short circuit is avoided.
Preferably, the insulating member includes a first face and a second face, the first face being connected to a side of the tab guide portion facing the electrode assembly, the second face facing the electrode assembly; the first face is provided with first connecting portion, tab guiding portion is provided with second connecting portion, first connecting portion with second connecting portion mutually support and connect.
In this scheme, adopt above-mentioned structural style, first face at least partly covers the pin and faces one side of electrode assembly, and the second face faces electrode assembly, and on the one hand, the insulating part can be with pin and electrode assembly physical isolation, and on the other hand is non-electrically conductive between first face and the second face, and the pin can't form the electrical connection with electrode assembly and avoid the emergence of short circuit. The insulating part is matched with the second connecting part of the pin through the first connecting part, so that the insulating part can be prevented from being displaced relative to the pin due to vibration in the use process, the insulating part is prevented from being separated from the position between the lug guide part and the electrode assembly, and the stable and reliable insulating effect is ensured.
Preferably, the first connecting portion protrudes from the first surface, the second connecting portion is recessed from the second surface, and the first connecting portion is clamped at the second connecting portion.
In this scheme, first connecting portion is protruding form, and second connecting portion is sunken form, and first connecting portion card is established in second connecting portion department, simple structure, low in manufacturing cost, and both cooperation modes are reliable stable.
Preferably, the first connection portion is disposed in a strip shape along a length direction of the insulating member.
In this scheme, adopt above-mentioned structural style, first connecting portion is rectangular shape and sets up along the length direction of insulating part for the area of contact of first connecting portion and second connecting portion increases, and frictional force is bigger, difficult slippage.
Preferably, the first connecting part is arranged at the middle position of the insulating piece, and the second connecting part is arranged at the middle position of the tab guiding part; and/or, the first connecting portion is provided with a limiting portion near one end of the top cover assembly, and the maximum width of the limiting portion is wider than that of other parts of the first connecting portion.
In this scheme, adopt above-mentioned structural style, first connecting portion and second connecting portion set up respectively in the intermediate position of insulating part and utmost point ear guiding portion, and both atress are more even, and the cooperation is more firm. In addition, because the one end that the first connecting portion is close to the top cap subassembly is provided with spacing portion, and the maximum width of spacing portion is wider than the width of other positions of first connecting portion, can prevent that first connecting portion from by the lower end wall roll-off of tab guiding portion.
Preferably, the second face is provided with a protrusion, and the protrusion abuts against the electrode assembly.
In this scheme, adopt above-mentioned structural style, owing to have the bulge butt in electrode assembly, the insulating part can play the cushioning effect between pin part and electrode assembly, can avoid the electric core to lead to the utmost point ear fracture because of vibrations in the course of the work.
Preferably, the projection is formed of an elastic material.
In the scheme, the buffer performance of the protruding part formed by the elastic material is better by adopting the structural form.
Preferably, the number of the protruding parts is a plurality, and the plurality of protruding parts are arranged on the second surface at intervals.
In this scheme, a plurality of bulge intervals set up on the second face, and the insulator is provided with buffer structure with electrode assembly looks butt's part comparatively evenly, and the insulator can play better cushioning effect between pin part and electrode assembly.
Preferably, a plurality of the protrusions are disposed obliquely with respect to the second face.
In this scheme, the bulge sets up for the slope of second face, can increase the area of contact of bulge and electrode assembly, improves the stability of insulating piece.
The utility model has the positive progress effects that: the electrode assembly is arranged in the shell, so that external sundries can be prevented from being pierced, the electrode assembly is protected, in addition, the top cover body is connected to the shell, and the protection effect is better. The tab that the electrode body extends is connected with the tab guide portion of pin part, and the terminal connecting portion of pin part is connected with the electrode terminal of top cap subassembly simultaneously, and the pin part can guide the electric quantity of electrode subassembly to top cap subassembly department promptly, and then carries to outside. The insulation piece is arranged between the tab guide part and the electrode assembly, so that the contact between the pin and the battery core can be prevented when the battery core vibrates violently in the actual use process, and the potential safety hazard caused by short circuit is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of a pin member and an insulator according to an embodiment of the present utility model.
Fig. 3 is a schematic structural view of an insulating member according to an embodiment of the present utility model.
Fig. 4 is a schematic view of another structure of an insulating member according to an embodiment of the present utility model.
Fig. 5 is a schematic view of another structure of an insulating member according to an embodiment of the present utility model.
Description of the reference numerals
Electrode assembly 1
Pin member 3
Second connecting portion 321
Insulating member 4
First connecting portion 411
Limiting portion 41111
Detailed Description
The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.
As shown in fig. 1, this embodiment provides a battery cell, including: a housing (not shown); an electrode assembly 1 disposed in the case, the electrode assembly 1 including an electrode body and tabs (not shown) extending from the electrode body; a cap assembly including a cap body 2 and electrode terminals (not shown in the drawings) provided on the cap body 2, the cap body 2 being coupled to the case; a lead member 3, the lead member 3 including a terminal connection part 31 and a tab guide part 32, the terminal connection part 31 being connected to the electrode terminal, the tab guide part 32 being connected to the tab, the terminal connection part 31 being connected to the tab guide part 32; an insulator 4, the insulator 4 being disposed between the tab guide 32 and the electrode assembly 1.
In this embodiment, the electrode assembly 1 is disposed in the case, so that the penetration of foreign matters outside can be avoided, the electrode assembly 1 is protected, and in addition, the top cover body 2 is connected to the case, so that the protection effect is better. The tab extending from the electrode body is connected with the tab guide portion 32 of the lead part 3, and the terminal connection portion 31 of the lead part 3 is connected with the electrode terminal of the cap assembly, that is, the lead part 3 can guide the electric quantity of the electrode assembly 1 to the cap assembly and then to the outside. The insulator 4 is arranged between the tab guide part 32 and the electrode assembly 1, so that the contact between the pins and the battery core can be prevented when the battery core is subjected to intense vibration in the actual use process, and potential safety hazards caused by short circuit can be avoided.
As shown in fig. 2 to 5, as a preferred embodiment, the insulating member 4 is in a sheet shape, and includes a first face 41 and a second face 42, the first face 41 is connected to a side of the tab guide portion 32 facing the electrode assembly 1, the first face 41 at least partially covers an inner side of the tab guide portion 32, and the second face 42 faces the electrode assembly 1; the first surface 41 is provided with a first connection portion 411, the tab guide portion 32 is provided with a second connection portion 321, and the first connection portion 411 and the second connection portion 321 are connected to each other in a fitting manner.
In this embodiment, with the above-mentioned structure, the first surface 41 at least partially covers the side of the lead facing the electrode assembly 1, and the second surface 42 faces the electrode assembly 1, so that, on one hand, the insulator 4 can physically isolate the lead from the electrode assembly 1, and on the other hand, the first surface 41 and the second surface 42 are not conductive, so that the lead cannot be electrically connected with the electrode assembly 1 to avoid shorting. The insulator 4 is matched with the second connecting part 321 of the pin through the first connecting part 411, so that the insulator 4 is prevented from being displaced relative to the pin due to vibration in the use process, the insulator 4 is prevented from being separated from the position between the tab guide part 32 and the electrode assembly 1, and the insulation effect is ensured to be stable and reliable. Of course, in other embodiments, the insulating member 4 may not be in a sheet shape, and may have a certain thickness according to the distance between the tab guide portion 32 and the electrode assembly 1, and the insulating effect may be achieved.
As shown in fig. 3, as a preferred embodiment, the first connecting portion 411 is disposed protruding from the first surface 41, the second connecting portion 321 is disposed recessed from the second surface 42, and the first connecting portion 411 is clamped at the second connecting portion 321.
In the present embodiment, the first connecting portion 411 is convex, the second connecting portion 321 is concave, and the first connecting portion 411 is clamped at the second connecting portion 321, so that the structure is simple, the manufacturing cost is low, and the matching manner of the two is reliable and stable. Of course, in other embodiments, the first connecting portion 411 may be in a groove shape, and the second connecting portion 321 may be a protruding portion with a shape matching the first connecting portion 411, which may be also realized by clamping and connecting the two.
As a preferred embodiment, the first connection portion 411 is provided in a long shape along the length direction of the insulating member 4.
In this embodiment, with the above-mentioned structure, the first connecting portion 411 is in a strip shape and is disposed along the length direction of the insulating member 4, so that the contact area between the first connecting portion 411 and the second connecting portion 321 is increased, the friction force is greater, and the sliding is not easy.
As a preferred embodiment, the first connection part 411 is disposed at the middle position of the insulator 4, and the second connection part 321 is disposed at the middle position of the tab guide part 32. The first connecting portion 411 is provided with a limiting portion 41111 near one end of the top cover assembly, and the maximum width of the limiting portion 41111 is wider than that of other portions of the first connecting portion 411.
In this embodiment, with the above structure, the first connecting portion 411 and the second connecting portion 321 are respectively disposed at the middle positions of the insulating member 4 and the tab guiding portion 32, so that the stress of the two is more uniform and the cooperation is more stable. Of course, in other embodiments, the first connecting portions 411 may be plural and arranged on the first surface 41 at intervals, so as to achieve a more stable connecting effect. In addition, since the first connecting portion 411 is provided with the limiting portion 41111 near one end of the top cover assembly, and the maximum width of the limiting portion 41111 is wider than that of other portions of the first connecting portion 411, the first connecting portion 411 can be prevented from sliding out of the lower end wall of the tab guiding portion 32.
In some embodiments, the end of the limiting portion 41111 away from the top cover is further provided with a recess portion 41112, and the minimum width of the recess portion 41112 is narrower than the width of other portions of the first connecting portion 411, so that the limiting portion 41111 can be further prevented from moving in a direction away from the top cover and sliding out from the lower end wall of the tab guiding portion 32 by the recess portion 41112, thereby improving the connection stability between the first connecting portion 411 and the tab guiding portion 32.
As shown in fig. 4 and 5, as a preferred embodiment, the second face 42 is provided with a protruding portion 421, and the protruding portion 421 abuts against the electrode assembly 1.
In this embodiment, the above structural form is adopted, since the protruding portion 421 abuts against the electrode assembly 1, the insulating member 4 can play a role in buffering between the pin member 3 and the electrode assembly 1, and it is possible to avoid the electrode tab breaking caused by vibration during the operation of the battery cell.
As a preferred embodiment, the protruding portion 421 is integrally formed with the insulating member 4 and is made of an elastic material.
In this embodiment, the above-mentioned structure is adopted, so that the buffer performance of the protruding portion 421 made of the elastic material is better.
As a preferred embodiment, the number of the protrusions 421 is plural, and the plurality of protrusions 421 are uniformly spaced on the second surface 42.
In this embodiment, the plurality of protruding portions 421 are disposed on the second surface 42 at intervals, and the portion of the insulating member 4 abutting against the electrode assembly 1 is relatively uniformly provided with a buffer structure, so that the insulating member 4 can perform a better buffer function between the lead member 3 and the electrode assembly 1.
As a preferred embodiment, the plurality of protrusions 421 are disposed obliquely with respect to the second face 42.
In the present embodiment, the protruding portion 421 is provided obliquely with respect to the second face 42, so that the contact area of the protruding portion 421 with the electrode assembly 1 can be increased, and the stability of the insulating member 4 can be improved.
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:
a housing;
the electrode assembly is arranged in the shell and comprises an electrode body and a tab extending from the electrode body;
the top cover assembly comprises a top cover body and an electrode terminal arranged on the top cover body, and the top cover body is connected with the shell;
a lead member including a terminal connection part connected with the electrode terminal and a tab guide part connected with the tab, the terminal connection part being connected with the tab guide part;
and an insulating member disposed between the tab guide portion and the electrode assembly.
2. The cell of claim 1, wherein the insulating member comprises a first face and a second face, the first face being connected to a side of the tab guide portion facing the electrode assembly, the second face facing the electrode assembly;
the first face is provided with first connecting portion, tab guiding portion is provided with second connecting portion, first connecting portion with second connecting portion mutually support and connect.
3. The cell of claim 2, wherein the first connection portion protrudes from the first surface, the second connection portion is recessed from the second surface, and the first connection portion is clamped at the second connection portion.
4. The cell of claim 3, wherein the first connection portion is disposed in a strip along a length of the insulating member.
5. The cell of claim 3, wherein the second connection portion extends through the tab guide portion.
6. The cell of claim 5, wherein the first connection portion is disposed at an intermediate position of the insulating member, and the second connection portion is disposed at an intermediate position of the tab guide portion;
and/or, the first connecting portion is provided with a limiting portion near one end of the top cover assembly, and the maximum width of the limiting portion is wider than that of other parts of the first connecting portion.
7. The cell of claim 2, wherein the second face is provided with a protrusion that abuts the electrode assembly.
8. The cell of claim 7, wherein the protrusion is comprised of an elastomeric material.
9. The cell of claim 7, wherein the number of protrusions is a plurality, and wherein the plurality of protrusions are spaced apart on the second face.
10. The cell of claim 7, wherein a plurality of the protrusions are disposed obliquely with respect to the second face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320117206.7U CN219163660U (en) | 2023-01-16 | 2023-01-16 | Battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320117206.7U CN219163660U (en) | 2023-01-16 | 2023-01-16 | Battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219163660U true CN219163660U (en) | 2023-06-09 |
Family
ID=86640164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320117206.7U Active CN219163660U (en) | 2023-01-16 | 2023-01-16 | Battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219163660U (en) |
-
2023
- 2023-01-16 CN CN202320117206.7U patent/CN219163660U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |