CN219917350U - Top cover structure and square secondary battery - Google Patents
Top cover structure and square secondary battery Download PDFInfo
- Publication number
- CN219917350U CN219917350U CN202321437427.9U CN202321437427U CN219917350U CN 219917350 U CN219917350 U CN 219917350U CN 202321437427 U CN202321437427 U CN 202321437427U CN 219917350 U CN219917350 U CN 219917350U
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- China
- Prior art keywords
- pole
- cover plate
- hole
- bending part
- sealing ring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005452 bending Methods 0.000 claims abstract description 64
- 238000007789 sealing Methods 0.000 claims abstract description 44
- 230000006835 compression Effects 0.000 abstract description 22
- 238000007906 compression Methods 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a top cover structure and a square secondary battery. The top cover structure comprises a cover plate, a pole assembly and a sealing ring. The cover plate is provided with a pole hole, the cover plate is provided with a bending part, the bending part is positioned in the pole hole, the bending part and the cover plate have a preset angle, the bending part is provided with a mounting hole, the mounting hole is communicated with the pole hole, the pole assembly sequentially penetrates through the mounting hole and the pole hole, the pole assembly is abutted to the cover plate, and the sealing ring is positioned in the pole hole and is abutted to the bending part. The bending part is obliquely arranged on the cover plate, and when the cover plate is assembled and connected with the pole assembly, the bending part can reduce or offset the deformation of the cover plate in the assembly process, so that the compression of the sealing ring abutted with the cover plate is uniform during the assembly.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a top cover structure and a square secondary battery.
Background
In the lithium battery production process, when a common square battery is assembled with a pole, a sealing ring is required to be sleeved between the pole and the cover plate so as to ensure the tightness between the pole and the cover plate and prevent electrolyte from flowing out of a gap.
For example, the application number is: chinese patent CN201720648386.6 discloses a high-tightness top cover of a power battery, which comprises a top cover plate, a positive electrode post, a negative electrode post and a sealing ring; the top cover sheet comprises a top surface, a bottom surface and two mounting holes penetrating from the top surface to the bottom surface, the positive pole comprises a positive pole column body and a positive pole bottom plate, the negative pole column comprises a negative pole column body and a negative pole bottom plate, and the peripheries of the positive pole column body and the negative pole column body are respectively sleeved with a sealing ring; the positive electrode bottom plate and the negative electrode bottom plate are respectively provided with a first annular positioning groove matched with the sealing ring, and the sealing ring is positioned in the first annular positioning grooves; when the positive pole column body/the negative pole column body is penetrated in the corresponding mounting hole, one surface of the sealing ring is abutted against the bottom surface of the top cover plate, and the other surface is abutted against the positive pole bottom plate/the negative pole bottom plate. According to the utility model, the annular locating grooves are additionally arranged on the positive and negative pole posts and the top cover plate to locate the sealing ring, so that the sealing ring can be effectively prevented from deforming in the injection molding process, the yield and the production efficiency of the top cover are improved, and the air tightness of the product is improved.
However, the structural design of the power battery top cover has the following problems in the use process:
above-mentioned power battery top cap exists the atress and takes place the deformation when the top cap piece equipment for cup joint the sealing washer compression volume on the apron is difficult control in the equipment process, leads to sealing washer everywhere compression volume inconsistent easily, and the sealing washer compression volume is not enough probably to lead to the gas tightness poor, and the excessive influence life of sealing washer compression volume.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a top cover structure and a square secondary battery with uniform compression quantity of a sealing ring, and better battery tightness.
The aim of the utility model is realized by the following technical scheme:
a roof structure comprising:
the device comprises a cover plate, a pole assembly and a sealing ring, wherein a pole hole is formed in the cover plate, a bending part is arranged on the cover plate, the bending part is located in the pole hole, a preset angle exists between the bending part and the cover plate, a mounting hole is formed in the bending part, the mounting hole is communicated with the pole hole, the pole assembly sequentially penetrates through the mounting hole and the pole hole, the pole assembly is abutted to the cover plate, and the sealing ring is located in the pole hole and abutted to the bending part.
In one embodiment, the predetermined angle is 10 ° -20 °.
In one embodiment, the bending part is obliquely arranged on the cover plate downwards.
In one embodiment, the bending portion and the cover plate are integrally formed.
In one embodiment, the bending portion is annular.
In one embodiment, the pole assembly comprises an upper plastic part and a pole, the pole is connected with the upper plastic part, the upper plastic part is in butt joint with the cover plate, the pole sequentially penetrates through the mounting hole and the pole hole, and the pole is used for being connected with the battery cell.
In one embodiment, the pole is provided with an annular clamping groove, and the upper plastic part is positioned in the annular clamping groove and connected with the pole.
In one embodiment, the pole further comprises a mounting groove, the mounting groove is respectively communicated with the pole hole and the mounting hole, and the sealing ring is located in the mounting groove, so that the sealing ring is clamped and abutted between the bending part and the pole.
In one embodiment, the top cover structure further comprises a lower plastic part, wherein the lower plastic part is connected with the cover plate, and the lower plastic part is abutted with the pole.
The square secondary battery comprises a shell, a battery core and the top cover structure in any embodiment, wherein the shell is connected with the cover plate, a containing cavity is formed in the shell, the battery core is located in the containing cavity, and the battery core is connected with the pole assembly.
Compared with the prior art, the utility model has at least the following advantages:
foretell top cap structure, the post hole has been seted up to the apron, and the protruding inner peripheral wall in post hole of locating of portion of bending, and the portion of bending has preset angle with the apron, and the portion slope of bending sets up in the apron promptly, when the apron is carrying out the equipment with the post subassembly and is connected, the portion of bending can reduce or offset the deformation volume of apron in the equipment process for with the sealing washer of apron butt after the equipment compression volume even, avoided the local compression volume of sealing washer not enough or the interference compression condition, and then make the battery leakproofness better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a top cover structure according to an embodiment;
FIG. 2 is a cross-sectional view of the top cover structure shown in FIG. 1;
FIG. 3 is an enlarged partial schematic view of the roof structure at A shown in FIG. 2;
FIG. 4 is another schematic view of the top cover structure shown in FIG. 1;
FIG. 5 is a cross-sectional view of the top cover structure shown in FIG. 4;
FIG. 6 is an enlarged partial schematic view of the roof structure at B of FIG. 5;
fig. 7 is a schematic structural view of a square secondary battery according to an embodiment;
fig. 8 is a structural sectional view of the square secondary battery shown in fig. 7.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The utility model provides a top cover structure which comprises a cover plate, a pole assembly and a sealing ring, wherein a pole hole is formed in the cover plate, a bending part is arranged in the pole hole, a preset angle exists between the bending part and the cover plate, a mounting hole is formed in the bending part, the mounting hole is communicated with the pole hole, the pole assembly sequentially penetrates through the mounting hole and the pole hole, the pole assembly is abutted to the cover plate, and the sealing ring is positioned in the pole hole and abutted to the bending part.
Foretell top cap structure, the post hole has been seted up to the apron, and the protruding inner peripheral wall in post hole of locating of portion of bending, and the portion of bending has preset angle with the apron, and the portion slope of bending sets up in the apron promptly, when the apron is carrying out the equipment with the post subassembly and is connected, the portion of bending can reduce or offset the deformation volume of apron in the equipment process for with the sealing washer of apron butt after the equipment compression volume even, avoided the local compression volume of sealing washer not enough or the interference compression condition, and then make the battery leakproofness better.
In order to better understand the technical scheme and beneficial effects of the present utility model, the following describes the present utility model in further detail with reference to specific embodiments:
as shown in fig. 1 to 6, the top cover structure 10a of an embodiment includes a cover plate 100, a pole assembly 200, and a sealing ring 300, where the cover plate 100 is provided with a pole hole 110, the cover plate 100 is provided with a bending portion 400, the bending portion 400 is located in the pole hole 110, the bending portion 400 and the cover plate 100 have a preset angle, that is, the bending portion 400 is obliquely disposed on the cover plate 100, the bending portion 400 is provided with a mounting hole 410, and the mounting hole 410 is communicated with the pole hole 110. Further, the pole assembly 200 sequentially penetrates through the mounting hole 410 and the pole hole 110, the pole assembly 200 abuts against the cover plate 100, and the seal ring 300 is located in the pole hole 110 and abuts against the bending portion 400.
As shown in fig. 6, in the present embodiment, the bending portion 400 and the cover plate 100 have a predetermined angle, that is, the bending portion 400 is obliquely disposed on the cover plate 100, and when the pole assembly 200 is assembled and connected with the cover plate 100, the obliquely disposed bending portion 400 can reduce or offset the deformation of the cover plate 100, so that the compression of the seal ring 300 abutting on the cover plate 100 is uniform.
The top cover structure 10a, the cover plate 100 is provided with the pole hole 110, the bending part 400 is convexly arranged on the inner peripheral wall of the pole hole 110, and the bending part 400 and the cover plate 100 are arranged at a preset angle, namely, the bending part 400 is obliquely arranged on the cover plate 100, when the cover plate 100 is assembled and connected with the pole assembly 200, the bending part 400 can reduce or offset the deformation of the cover plate 100 in the assembling process, so that the compression of the sealing ring 300 abutted with the cover plate 100 is uniform after the assembly, the condition that the partial compression of the sealing ring 300 is insufficient or interference compression is avoided, and further, the battery tightness is better.
In one embodiment, the predetermined angle is 10 ° -20 °, so that the bending portion 400 is obliquely disposed on the cover plate 100.
As shown in fig. 6, in one embodiment, the bending portion 400 is disposed obliquely downward on the cover plate 100. It can be appreciated that the bending portion 400 is connected to the cover plate 100 in an inclined manner toward the sealing ring 300, so as to reduce or counteract the deformation of the cover plate 100 during assembly, and further make the compression of the sealing ring 300 uniform.
In one embodiment, the bending portion 400 and the cover plate 100 are integrally formed. It can be appreciated that the bending portion 400 and the cover plate 100 are integrally injection molded, so as to improve the structural strength of the bending portion 400 and the cover plate 100.
In one embodiment, as shown in fig. 4, the bending portion 400 has a ring shape. It can be understood that the bending portion 400 abuts against the sealing ring 300, the sealing ring 300 is in an annular structure, and the bending portion 400 is also in an annular structure, that is, the shape of the sealing ring 300 is adapted to the shape of the bending portion 400, so as to ensure that the compression amount of the sealing ring 300 is uniform.
As shown in fig. 3, in one embodiment, the pole assembly 200 includes an upper plastic member 210 and a pole 220, the pole 220 is connected to the upper plastic member 210, the upper plastic member 210 is abutted to the cover plate 100, the pole 220 sequentially penetrates through the mounting hole 410 and the pole hole 110, and the pole 220 is connected to the battery cell 700. It can be understood that the pole 220 is sequentially inserted through the mounting hole 410 and the pole hole 110 and then connected to the battery cell 700, so as to realize the conducting function of the battery. Further, the upper plastic member 210 is abutted between the pole 220 and the cover plate 100, so as to ensure the insulation of the cover plate 100.
As shown in fig. 3, in one embodiment, the pole 220 is provided with an annular clamping groove 221, and the upper plastic member 210 is located in the annular clamping groove 221 and connected with the pole 220, so that the upper plastic member 210 is clamped and abutted between the pole 220 and the cover plate 100, thereby ensuring the insulation of the cover plate 100, and meanwhile, the upper plastic member 210 is clamped on the cover plate 100, so as to have a certain supporting and fixing effect on the pole 220.
As shown in fig. 3, in one embodiment, the pole 220 is further provided with a mounting groove 222, the mounting groove 222 is respectively connected with the pole hole 110 and the mounting hole 410, and the seal ring 300 is located in the mounting groove 222, so that the seal ring 300 is clamped and abutted between the bending portion 400 and the pole 220.
It can be appreciated that the sealing ring 300 is clamped and abutted between the bending portion 400 and the polar post 220, and the bending portion 400 obliquely arranged on the cover plate 100 can reduce or offset the deformation amount of the cover plate 100, so that the compression amount of the sealing ring 300 is uniform, the sealing performance between the polar post 220 and the cover plate 100 is good, and the electrolyte inside the battery is prevented from flowing out of the gap.
As shown in fig. 3, in one embodiment, the top cover structure 10a further includes a lower plastic member 500, where the lower plastic member 500 is connected to the cover plate 100, and the lower plastic member 500 abuts against the pole 220. It can be appreciated that the lower plastic member 500 further ensures the insulation of the cap plate 100, preventing the battery from being shorted.
As shown in fig. 7 and 8, the present utility model further provides a square secondary battery 10, which includes a housing 600, a battery cell 700, and a top cover structure 10a according to any of the foregoing embodiments, wherein the housing 600 is connected to the cover plate 100, the housing 600 is provided with a receiving cavity 610, the battery cell 700 is located in the receiving cavity 610, and the battery cell 700 is connected to the pole assembly 200, so as to achieve a conducting function of the battery.
Compared with the prior art, the utility model has at least the following advantages:
foretell top cap structure, the post hole has been seted up to the apron, and the protruding inner peripheral wall in post hole of locating of portion of bending, and the portion of bending has preset angle with the apron, and the portion slope of bending sets up in the apron promptly, when the apron is carrying out the equipment with the post subassembly and is connected, the portion of bending can reduce or offset the deformation volume of apron in the equipment process for with the sealing washer of apron butt after the equipment compression volume even, avoided the local compression volume of sealing washer not enough or the interference compression condition, and then make the battery leakproofness better.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The top cover structure comprises a cover plate, a pole assembly and a sealing ring, wherein the cover plate is provided with a pole hole,
the cover plate is provided with a bending part, the bending part is positioned in the pole hole, a preset angle exists between the bending part and the cover plate, the bending part is provided with a mounting hole, the mounting hole is communicated with the pole hole, the pole assembly sequentially penetrates through the mounting hole and the pole hole, the pole assembly is abutted to the cover plate, and the sealing ring is positioned in the pole hole and abutted to the bending part.
2. The roof structure of claim 1, wherein the predetermined angle is 10 ° -20 °.
3. The roof structure of claim 1, wherein the bent portion is disposed obliquely downward on the cover plate.
4. The roof structure of claim 1, wherein the fold is integrally formed with the cover plate.
5. The roof structure of claim 1, wherein the bent portion has a ring shape.
6. The top cover structure according to claim 1, wherein the pole assembly comprises an upper plastic part and a pole, the pole is connected with the upper plastic part, the upper plastic part is abutted with the cover plate, the pole sequentially penetrates through the mounting hole and the pole hole, and the pole is used for being connected with the battery cell.
7. The top cover structure according to claim 6, wherein the pole is provided with an annular clamping groove, and the upper plastic part is located in the annular clamping groove and connected with the pole.
8. The top cover structure according to claim 6, wherein the pole further comprises a mounting groove, the mounting groove is respectively communicated with the pole hole and the mounting hole, and the sealing ring is located in the mounting groove, so that the sealing ring is clamped and abutted between the bending portion and the pole.
9. The top cover structure of claim 6, further comprising a lower plastic piece, wherein the lower plastic piece is connected to the cover plate, and wherein the lower plastic piece abuts the pole.
10. A square secondary battery characterized by comprising a shell, a battery cell and the top cover structure of any one of claims 1-9, wherein the shell is connected with the cover plate, a containing cavity is formed in the shell, the battery cell is located in the containing cavity, and the battery cell is connected with the pole assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321437427.9U CN219917350U (en) | 2023-06-06 | 2023-06-06 | Top cover structure and square secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321437427.9U CN219917350U (en) | 2023-06-06 | 2023-06-06 | Top cover structure and square secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219917350U true CN219917350U (en) | 2023-10-27 |
Family
ID=88468509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321437427.9U Active CN219917350U (en) | 2023-06-06 | 2023-06-06 | Top cover structure and square secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219917350U (en) |
-
2023
- 2023-06-06 CN CN202321437427.9U patent/CN219917350U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |