CN219959205U - Battery cover plate and battery - Google Patents
Battery cover plate and battery Download PDFInfo
- Publication number
- CN219959205U CN219959205U CN202321492224.XU CN202321492224U CN219959205U CN 219959205 U CN219959205 U CN 219959205U CN 202321492224 U CN202321492224 U CN 202321492224U CN 219959205 U CN219959205 U CN 219959205U
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- CN
- China
- Prior art keywords
- insulating
- sealing
- polar plate
- plate
- piece
- Prior art date
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 133
- 230000002093 peripheral effect Effects 0.000 claims abstract description 40
- 238000005260 corrosion Methods 0.000 claims abstract description 29
- 230000007797 corrosion Effects 0.000 claims description 17
- 238000005536 corrosion prevention Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 5
- 238000004026 adhesive bonding Methods 0.000 description 4
- 239000000565 sealant Substances 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 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
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a battery cover plate and a battery, wherein the battery cover plate comprises a first polar plate, a second polar plate and an insulating sealing component, the insulating sealing component comprises an insulating connecting piece, a waterproof sealing piece and an insulating corrosion-proof piece, and the insulating connecting piece is arranged between the first polar plate and the second polar plate so as to insulate the first polar plate from the second polar plate; through holes exposing the second polar plate are respectively arranged on the first polar plate and the insulating connecting piece; the waterproof sealing piece is arranged in the through hole, and the inner peripheral surfaces of the first polar plate and the insulating connecting piece are respectively connected with the waterproof sealing piece; the insulating anti-corrosion part is respectively connected with the second polar plate and the outer peripheral surface of the first sealing part, and one end of the insulating anti-corrosion part, which faces the first polar plate, is connected with the first polar plate. The battery cover plate solves the problem of insufficient sealing reliability of the existing battery cover plate by arranging the waterproof sealing piece and the insulating anti-corrosion piece.
Description
Technical Field
The utility model relates to the technical field of battery cover plates, in particular to a battery cover plate and a battery.
Background
Currently, the casing of the button-type lithium ion battery often adopts a riveting structure formed by combining a cover plate and a casing, or a welding structure formed by combining the cover plate and the casing to complete the packaging of the lithium ion battery, wherein the riveting structure comprises a traditional riveting structure, a lamination adhesive bonding structure and the like. The traditional laminated adhesive structure is simpler, but the sealing effect is completely dependent on the material and the adhesive bonding process of the sealant, in the traditional laminated adhesive structure, the adhesive layer is used as the sealant and also is used as the structural adhesive, in order to reduce the overall thickness of the cover plate, the space occupied by the adhesive layer is usually sacrificed, the adhesive layer is generally thinner, the electrolyte is contacted with the adhesive layer and soaked, the adhesive layer composite strength is weakened, so that the sealing performance is weakened, in addition, the traditional sealant layer is not waterproof, water vapor has the risk of entering the battery, and the long-term sealing reliability is further influenced.
Disclosure of Invention
The utility model aims to provide a battery cover plate and a battery, aiming at the problem of insufficient sealing reliability of the conventional battery cover plate.
In one aspect, the utility model provides a battery cover plate comprising a first polar plate, a second polar plate and an insulating sealing assembly, wherein the insulating sealing assembly comprises an insulating connecting piece, a waterproof sealing piece and an insulating corrosion prevention piece, and the insulating connecting piece is arranged between the first polar plate and the second polar plate so as to insulate the first polar plate from the second polar plate; through holes exposing the second polar plate are respectively arranged on the first polar plate and the insulating connecting piece; the waterproof sealing piece is arranged in the through hole, and the inner peripheral surfaces of the first polar plate and the insulating connecting piece are respectively connected with the waterproof sealing piece; the insulating anti-corrosion part is respectively connected with the second polar plate and the outer peripheral surface of the insulating connecting part, and one end of the insulating anti-corrosion part, which faces the first polar plate, is connected with the first polar plate.
Optionally, the waterproof sealing element is a three-proofing glue; the insulating corrosion prevention piece is fluororubber.
Optionally, a first through hole is formed in the first polar plate, a second through hole is formed in the insulating connecting piece, and projection of the inner edge of the insulating connecting piece in the direction of the first polar plate is located in the first through hole area;
the waterproof sealing piece comprises a first sealing part and a second sealing part, the outer peripheral surface of the first sealing part is in sealing connection with the inner peripheral surface of the first polar plate, and one surface of the first sealing part facing the insulating connecting piece is in sealing connection with the insulating connecting piece; one end of the second sealing part is connected with the first sealing part, and the outer peripheral surface of the second sealing part is connected with the inner peripheral surface of the insulating connecting piece in a sealing way.
Optionally, a projection of the outer edge of the insulating connecting piece in the direction of the first polar plate is located on the first polar plate, and a projection of the outer edge of the second polar plate in the direction of the insulating connecting piece is located on the extension surface of the insulating connecting piece;
the insulating anti-corrosion piece comprises a third sealing part and a fourth sealing part, the inner peripheral surface of the third sealing part is in sealing connection with the outer peripheral surface of the insulating connecting piece, and one surface of the third sealing part facing the first polar plate is in sealing connection with the first polar plate; one end of the fourth sealing part is connected with the third sealing part, and the inner peripheral surface of the fourth sealing part is connected with the outer peripheral surface of the second polar plate in a sealing way.
Optionally, the insulating corrosion protection element is an elastic sealing element, and the third sealing portion is formed by compression of the insulating corrosion protection element under the extrusion of the second pole plate.
Optionally, a pole is disposed on the second polar plate, the pole is disposed in the through hole, and the pole protrudes from one surface of the second polar plate, facing the first polar plate, in a direction away from the second polar plate.
The periphery of the pole is in sealing connection with the inner peripheral surface of the waterproof sealing piece, and the thickness of the waterproof sealing piece is smaller than or equal to that of the pole.
Optionally, the cross section of utmost point post is circular, the utmost point post orientation the one side of through-hole is provided with the constant head tank, the constant head tank with the utmost point post concentric setting.
Optionally, the positioning groove is a conical groove or a cylindrical groove.
On the other hand, the utility model also provides a battery, which comprises the battery cover plate.
According to the utility model, the battery cover plate is sealed by arranging the waterproof sealing piece and the insulating anti-corrosion piece, the waterproof sealing piece is respectively connected with the inner peripheral surfaces of the first polar plate and the insulating connecting piece while the insulating connecting piece is connected between the first polar plate and the second polar plate, and the insulating anti-corrosion piece is respectively connected with the outer peripheral surfaces of the second polar plate and the insulating connecting piece, so that the connection strength and the integral sealing performance of the first polar plate and the second polar plate are further improved, the sealing reliability is improved, the integral height of the sub battery cover plate is reduced, and the space is saved. Through setting up waterproof sealing spare, the steam in the isolated air prevents that steam from getting into inside the battery. Through setting up insulating anticorrosive spare for keep apart the electrolyte in the battery, prevent that electrolyte from corroding insulating connecting piece.
Drawings
FIG. 1 is a schematic top view of a battery cover plate according to an embodiment of the present utility model;
fig. 2 is a schematic cross-sectional view of a battery cover plate according to an embodiment of the utility model.
Reference numerals in the drawings of the specification are as follows:
1. a first plate;
2. a second polar plate; 21. a pole; 22. a positioning groove;
3. an insulating connector;
4. a waterproof seal; 41. a first sealing part; 42. a second sealing part;
5. an insulating corrosion protection member; 51. a third sealing part; 52. and a fourth sealing part.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that terms such as "front", "rear", "vertical", "horizontal", "upper", "lower", "inner", "outer", and the like are used solely with reference to the drawings in which the present utility model is used, and are not intended to be limiting in any way.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "connected" should be interpreted broadly, and for example, it may be a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In order to illustrate the technical scheme of the utility model, the following description is made by specific examples.
As shown in fig. 1 and 2, a battery cover plate according to an embodiment of the present utility model includes a first electrode plate 1, a second electrode plate 2, an insulating connector 3, and an insulating sealing member, wherein the insulating connector 3 is disposed between the first electrode plate 1 and the second electrode plate 2 to insulate the first electrode plate 1 from the second electrode plate 2. Through holes (not shown) exposing the second electrode plate 2 are respectively arranged on the first electrode plate 1 and the insulating connecting piece 3.
The insulating sealing assembly comprises a waterproof sealing piece 4 and an insulating corrosion prevention piece 5, the waterproof sealing piece 4 is arranged in the through hole, and the inner peripheral surfaces of the first polar plate 1 and the insulating connecting piece 3 are respectively connected with the waterproof sealing piece 4. The insulating and corrosion preventing piece 5 is respectively connected with the outer peripheral surfaces of the second polar plate 2 and the insulating and corrosion preventing piece 3, and one end of the insulating and corrosion preventing piece 5, which faces the first polar plate 1, is connected with the first polar plate 1.
Specifically, the first polar plate 1 is a positive polar plate, the second polar plate 2 is a negative polar plate, the insulating connecting piece 3 is sealant, and the insulating connecting piece 3 realizes the connection of the first polar plate 1 and the second polar plate 2 through injection molding or thermal compounding. The waterproof sealing element 4 can be in sealing connection with the inner peripheral surfaces of the first polar plate 1 and the insulating connecting element 3 in an injection molding or gluing mode, and the insulating anti-corrosion element 5 can be in sealing connection with the outer peripheral surfaces of the second polar plate 2 and the insulating connecting element 3 in an injection molding, gluing or glue coating mode.
In this embodiment, seal the battery cover plate through setting up waterproof sealing spare 4 and insulating anticorrosive spare 5, when insulating connecting piece 3 connects between first polar plate 1 and second polar plate 2, waterproof sealing spare 4 is connected with the inner peripheral face of first polar plate 1 and insulating connecting piece 3 respectively, insulating anticorrosive spare 5 is connected with the outer peripheral face of second polar plate 2 and insulating connecting piece 3 respectively, further improved the joint strength and the holistic sealing performance of first polar plate 1 and second polar plate 2, improve sealed reliability, be favorable to reducing the whole height of sub-battery cover plate simultaneously, save space. Through setting up waterproof sealing spare 4, the steam in the isolated air prevents that steam from getting into inside the battery. By providing the insulating corrosion preventing member 5 for isolating the electrolyte in the battery, the electrolyte is prevented from corroding the insulating connecting member 3.
In some embodiments of the present utility model, the waterproof sealing member 4 is made of materials such as a three-proofing adhesive, and the main component of the three-proofing adhesive is modified polyurethane resin, and is used for isolating water vapor in air. The insulating corrosion prevention piece 5 is made of fluororubber and the like and is used for isolating electrolyte in the battery and preventing the electrolyte from corroding the insulating connecting piece 3.
As shown in fig. 2, in an embodiment of the present utility model, a first through hole is provided on the first polar plate 1, a second through hole is provided on the insulating connecting member 3, and a projection of an inner edge of the insulating connecting member 3 in a direction of the first polar plate 1 is located in a region of the first through hole. That is to say, the sizes of the through holes exposing the second pole plate 2 on the first pole plate 1 and the insulating connecting piece 3 are different.
The waterproof sealing member 4 comprises a first sealing portion 41 and a second sealing portion 42, wherein the outer peripheral surface of the first sealing portion 41 is in sealing connection with the inner peripheral surface of the first polar plate 1, one surface of the first sealing portion 41 facing the insulating connecting member 3 is in sealing connection with the insulating connecting member 3, and connection reliability of the first sealing portion 41 is improved. One end of the second sealing portion 42 is connected to the first sealing portion 41, and an outer peripheral surface of the second sealing portion 42 is connected to an inner peripheral surface of the insulating connector 3 in a sealing manner. Specifically, the end of the second seal portion 42 remote from the first seal portion 41 is in sealing connection with the first electrode plate 1.
Here, the first sealing portion 41 may be in sealing connection with the inner peripheral surface of the first electrode plate 1, or may cover the first electrode plate 1, that is, when the thickness of the first sealing portion 41 is higher than that of the first electrode plate 1, a portion of the first sealing portion 41 higher than the first electrode plate 1 extends to the surface of the first electrode plate 1.
As shown in fig. 2, in some embodiments of the present utility model, a projection of the outer edge of the insulating connector 3 in the direction of the first electrode plate 1 is located on the first electrode plate 1, and a projection of the outer edge of the second electrode plate 2 in the direction of the insulating connector 3 is located on the extension surface of the insulating connector 3.
The insulating corrosion protection member 5 includes a third sealing portion 51 and a fourth sealing portion 52, an inner circumferential surface of the third sealing portion 51 is in sealing connection with an outer circumferential surface of the insulating connection member 3, and a surface of the third sealing portion 51 facing the first electrode plate 1 is in sealing connection with the first electrode plate 1. One end of the fourth sealing portion 52 is connected to the third sealing portion 51, and an inner peripheral surface of the fourth sealing portion 52 is connected to an outer peripheral surface of the second electrode plate 2 in a sealing manner. The third sealing part 51 is provided between the first electrode plate 1 and the second electrode plate 2, and increases the strength of the battery cover plate while increasing the connection strength of the insulating corrosion preventing member 5.
As shown in fig. 2, in some embodiments of the present utility model, the insulating and corrosion preventing member 5 is an elastic sealing member, and the third sealing portion 51 is formed by compressing the insulating and corrosion preventing member 5 under the compression of the second electrode plate 2, so as to facilitate the installation of the second electrode plate 2. The compressed part of the insulating corrosion protection member 5, namely the third sealing part 51 plays a main sealing role, the compression amount of the insulating corrosion protection member 5 is 25-35%, and the thickness of the insulating connecting member 3 is 25-35% of the thickness of the insulating corrosion protection member 5 before being compressed.
As shown in fig. 2, in some embodiments of the present utility model, a pole 21 is disposed on the second polar plate 2, the pole 21 is disposed in the through hole, and the pole 21 protrudes from a surface of the second polar plate 2 facing the first polar plate 1 in a direction away from the second polar plate 2, so as to facilitate connection with an external device.
As shown in fig. 2, in some embodiments of the present utility model, the outer periphery of the pole 21 is in sealing connection with the inner peripheral surface of the waterproof sealing member 4, specifically, an interference fit is formed between the pole 21 and the waterproof sealing member 4, so as to increase the sealing performance between the pole 21 and the waterproof sealing member 4. And the thickness of the waterproof sealing member 4 is smaller than or equal to the thickness of the pole 21, so that the thickness of the battery cover plate is prevented from being increased.
As shown in fig. 2, in some embodiments of the present utility model, the cross section of the pole 21 is circular, a positioning groove 22 is disposed on a surface of the pole 21 facing the through hole, and the positioning groove 22 is disposed concentric with the pole 21. The positioning groove 22 is used for ensuring concentricity of the pole column 21 and the first pole plate 1 and facilitating positioning during subsequent pin angle welding.
In some embodiments of the utility model, the positioning groove 22 is a conical groove or a cylindrical groove, as shown in fig. 2.
On the other hand, an embodiment of the present utility model further provides a battery, including the battery cover plate according to any one of the embodiments.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents. Such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (10)
1. The battery cover plate is characterized by comprising a first polar plate, a second polar plate and an insulating sealing assembly, wherein the insulating sealing assembly comprises an insulating connecting piece, a waterproof sealing piece and an insulating corrosion-resistant piece, and the insulating connecting piece is arranged between the first polar plate and the second polar plate so as to insulate the first polar plate from the second polar plate; through holes exposing the second polar plate are respectively arranged on the first polar plate and the insulating connecting piece; the waterproof sealing piece is arranged in the through hole, and the inner peripheral surfaces of the first polar plate and the insulating connecting piece are respectively connected with the waterproof sealing piece; the insulating anti-corrosion part is respectively connected with the second polar plate and the outer peripheral surface of the insulating connecting part, and one end of the insulating anti-corrosion part, which faces the first polar plate, is connected with the first polar plate.
2. The battery cover of claim 1, wherein the waterproof seal is a tri-proof gel; the insulating corrosion prevention piece is fluororubber.
3. The battery cover plate according to claim 2, wherein a first through hole is formed in the first polar plate, a second through hole is formed in the insulating connecting piece, and a projection of the inner edge of the insulating connecting piece in the direction of the first polar plate is located in the first through hole area;
the waterproof sealing piece comprises a first sealing part and a second sealing part, the outer peripheral surface of the first sealing part is in sealing connection with the inner peripheral surface of the first polar plate, and one surface of the first sealing part facing the insulating connecting piece is in sealing connection with the insulating connecting piece; one end of the second sealing part is connected with the first sealing part, and the outer peripheral surface of the second sealing part is connected with the inner peripheral surface of the insulating connecting piece in a sealing way.
4. The battery cover plate of claim 1, wherein a projection of an outer edge of the insulating connector in the direction of the first plate is located on the first plate, and a projection of an outer edge of the second plate in the direction of the insulating connector is located on an extension surface of the insulating connector;
the insulating anti-corrosion piece comprises a third sealing part and a fourth sealing part, the inner peripheral surface of the third sealing part is in sealing connection with the outer peripheral surface of the insulating connecting piece, and one surface of the third sealing part facing the first polar plate is in sealing connection with the first polar plate; one end of the fourth sealing part is connected with the third sealing part, and the inner peripheral surface of the fourth sealing part is connected with the outer peripheral surface of the second polar plate in a sealing way.
5. The battery cover plate of claim 4, wherein the insulating corrosion protection member is an elastic sealing member, and the third sealing portion is formed by compression of the insulating corrosion protection member under the pressing of the second electrode plate.
6. The battery cover plate according to claim 1, wherein a post is provided on the second electrode plate, the post is provided in the through hole, and the post protrudes from a face of the second electrode plate toward the first electrode plate in a direction away from the second electrode plate.
7. The battery cover plate according to claim 6, wherein an outer periphery of the pole is in sealing connection with an inner peripheral surface of the waterproof seal, and a thickness of the waterproof seal is less than or equal to a thickness of the pole.
8. The battery cover plate according to claim 6, wherein the cross section of the pole is circular, a positioning groove is formed in one surface of the pole facing the through hole, and the positioning groove is concentric with the pole.
9. The battery cover plate of claim 8, wherein the positioning groove is a conical groove or a cylindrical groove.
10. A battery comprising a battery cover as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321492224.XU CN219959205U (en) | 2023-06-12 | 2023-06-12 | Battery cover plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321492224.XU CN219959205U (en) | 2023-06-12 | 2023-06-12 | Battery cover plate and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219959205U true CN219959205U (en) | 2023-11-03 |
Family
ID=88554919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321492224.XU Active CN219959205U (en) | 2023-06-12 | 2023-06-12 | Battery cover plate and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219959205U (en) |
-
2023
- 2023-06-12 CN CN202321492224.XU patent/CN219959205U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |