CN219892341U - Battery case and battery - Google Patents
Battery case and battery Download PDFInfo
- Publication number
- CN219892341U CN219892341U CN202320302584.2U CN202320302584U CN219892341U CN 219892341 U CN219892341 U CN 219892341U CN 202320302584 U CN202320302584 U CN 202320302584U CN 219892341 U CN219892341 U CN 219892341U
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- Prior art keywords
- explosion
- proof groove
- battery
- proof
- cover plate
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- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000004880 explosion Methods 0.000 claims description 27
- 239000003792 electrolyte Substances 0.000 abstract description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a battery shell and a battery, wherein the battery shell comprises a shell, and two axial ends of the shell are open; the positive cover plate and the negative cover plate are respectively connected to two ends of the shell in the axial direction so as to respectively block the two open openings of the shell, one of the positive cover plate and the negative cover plate is provided with a liquid injection hole, the other is an explosion-proof plate, and the outer surface of the other is provided with a first explosion-proof groove and a second explosion-proof groove. According to the battery shell, the first explosion-proof groove and the second explosion-proof groove are separated from the liquid injection hole, so that the problems that the first explosion-proof groove and the second explosion-proof groove rust and corrode and the like are caused when electrolyte is injected into the battery, the first explosion-proof groove and the second explosion-proof groove are stable in structure, the influence on the performance of the battery is reduced, the pressure release area of the battery is increased, and the safety of the battery is improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery shell and a battery.
Background
With the continuous development of technology, the requirements of users on new energy batteries are getting higher. In order to improve the safety performance of the battery cell, a pressure relief mechanism is usually arranged on the battery cell, and when the battery cell runs abnormally and generates gas inside, the gas can be discharged through the pressure relief mechanism, so that a large safety accident is avoided. At present, when the battery is assembled, the risk that electrolyte corrodes a pressure relief structure exists during liquid injection, and the battery performance is seriously influenced.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the battery shell, which ensures that the first explosion-proof groove and the second explosion-proof groove are stable in structure, reduces the influence on the performance of the battery, increases the pressure release area of the battery and improves the safety of the battery.
The utility model also provides a battery, which comprises the battery shell.
According to an embodiment of the present utility model, a battery case includes: a housing having both axial ends open; the positive cover plate and the negative cover plate are respectively connected to two ends of the shell in the axial direction so as to respectively block the two open openings of the shell, one of the positive cover plate and the negative cover plate is provided with a liquid injection hole, the other is an explosion-proof plate, and the outer surface of the other is provided with a first explosion-proof groove and a second explosion-proof groove.
According to the battery shell provided by the embodiment of the utility model, the first explosion-proof groove and the second explosion-proof groove are arranged and are separated from the liquid injection hole on the anode cover plate and the cathode cover plate, so that the first explosion-proof groove and the second explosion-proof groove are separated from the liquid injection hole, electrolyte can be prevented from flowing into the first explosion-proof groove and the second explosion-proof groove when electrolyte is injected into the battery, the problems of rust corrosion and the like of the first explosion-proof groove and the second explosion-proof groove are caused, the structures of the first explosion-proof groove and the second explosion-proof groove are stable, the influence on the battery performance is reduced, the pressure release area of the battery is increased, and the safety of the battery is improved.
In some embodiments of the present utility model, the liquid injection hole is disposed on the negative electrode cover plate, the positive electrode cover plate is an explosion-proof plate, and the first explosion-proof groove and the second explosion-proof groove are disposed on the positive electrode cover plate.
In some embodiments of the present utility model, the first explosion-proof groove and the second explosion-proof groove extend in the same direction, and in the width direction of the first explosion-proof groove, the first explosion-proof groove and the second explosion-proof groove are opposite and spaced apart.
In some embodiments of the utility model, the first and second explosion proof grooves each extend in a circumferential direction of the explosion proof panel and are spaced apart in a center-to-edge direction of the explosion proof panel, the first explosion proof groove being disposed proximate a center of the explosion proof panel relative to the second explosion proof groove.
In some embodiments of the utility model, the first explosion-proof groove is an open loop shape with a first opening, and the second explosion-proof groove is an open loop shape with a second opening, and the first opening and the second opening are opposite.
In some embodiments of the present utility model, the first explosion-proof groove is in an open loop shape with a first opening, the second explosion-proof groove is in an annular shape, or the first explosion-proof groove is in an annular shape, and the second explosion-proof groove is in an annular shape with a second opening.
In some embodiments of the utility model, the first and second openings have a width a times the thickness of the vent panel, the a satisfying: a is more than or equal to 0.8.
In some embodiments of the utility model, the positive cover plate is riveted to the housing and the negative cover plate is welded to the housing.
In some embodiments of the utility model, the housing is cylindrical.
The battery according to the embodiment of the utility model comprises the battery shell.
According to the battery provided by the embodiment of the utility model, the first explosion-proof groove and the second explosion-proof groove are formed in the battery shell, and the first explosion-proof groove and the second explosion-proof groove are separated from the liquid injection hole and are formed in the positive electrode cover plate and the negative electrode cover plate, so that the first explosion-proof groove and the second explosion-proof groove are separated from the liquid injection hole, electrolyte can be prevented from flowing into the first explosion-proof groove and the second explosion-proof groove when the electrolyte is injected into the battery, and the problems of rust corrosion and the like of the first explosion-proof groove and the second explosion-proof groove are caused, so that the structures of the first explosion-proof groove and the second explosion-proof groove are stable, the influence on the performance of the battery is reduced, the pressure release area of the battery is increased, and the safety of the battery is improved.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic view of a battery according to an embodiment of the present utility model;
fig. 2 is a top view of a battery according to an embodiment of the present utility model;
fig. 3 is a cross-sectional view of a battery according to an embodiment of the present utility model;
fig. 4 is an enlarged view at a in fig. 3.
Reference numerals:
100. a battery;
10. a battery case;
1. a housing; 11. an open mouth;
2. a positive electrode cover plate; 21. a first explosion-proof groove; 211. a first opening; 22. a second explosion-proof groove; 221. a second opening;
3. a negative electrode cover plate; 31. and a liquid injection hole.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; 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 will be understood in specific cases by those of ordinary skill in the art.
A battery case 1 according to an embodiment of the present utility model is described below with reference to fig. 1 to 4.
As shown in fig. 1, a battery case 1 according to an embodiment of the present utility model includes a case 1, a positive electrode cap plate 2, and a negative electrode cap plate 3.
Specifically, referring to fig. 3 and 4, the axial ends of the case 1 are opened, and the case 1 serves to protect the internal structure of the battery 100. The positive electrode cover plate 2 and the negative electrode cover plate 3 are respectively connected to two ends of the shell 1 in the axial direction so as to respectively block two open openings 11 of the shell 1, one of the positive electrode cover plate 2 and the negative electrode cover plate 3 is provided with a liquid injection hole 31, the liquid injection hole 31 is used for injecting electrolyte into the battery 100 when the battery 100 is assembled, and the other is an explosion-proof plate, and the outer surface of the other is provided with a first explosion-proof groove 21 and a second explosion-proof groove 22.
It can be appreciated that, since the thicknesses of the explosion-proof plates at the first explosion-proof groove 21 and the second explosion-proof groove 22 are relatively smaller than those of other parts of the explosion-proof plates, when the internal air pressure of the battery 100 rises due to abnormal conditions such as heating inside the battery 100, the air can break the bottom walls of the first explosion-proof groove 21 and the second explosion-proof groove 22, thereby playing a role in pressure relief.
Further, when the battery 100 is assembled, the first explosion-proof groove 21 and the second explosion-proof groove 22 are arranged on the positive electrode cover plate 2 and the negative electrode cover plate 3 separately from the liquid injection hole 31, so that the first explosion-proof groove 21 and the second explosion-proof groove 22 are separated from the liquid injection hole 31, and electrolyte can be prevented from flowing into the first explosion-proof groove 21 and the second explosion-proof groove 22 when electrolyte is injected into the battery 100, thereby causing the problems of rust corrosion and the like of the first explosion-proof groove 21 and the second explosion-proof groove 22, ensuring that the first explosion-proof groove 21 and the second explosion-proof groove 22 are stable in structure, and reducing the influence on the performance of the battery 100.
In addition, set up first explosion-proof recess 21 and second explosion-proof recess 22 for setting up an explosion-proof recess on the explosion-proof board, increased the area of battery 100 pressure release, prevent because of the pressure when releasing, the pressure is too concentrated and lead to explosion, promoted the security of battery 100.
According to the battery case 1 of the embodiment of the utility model, by arranging the first explosion-proof groove 21 and the second explosion-proof groove 22 and arranging the first explosion-proof groove 21 and the second explosion-proof groove 22 on the positive electrode cover plate 2 and the negative electrode cover plate 3 separately from the liquid injection hole 31, the first explosion-proof groove 21 and the second explosion-proof groove 22 are separated from the liquid injection hole 31, and electrolyte can be prevented from flowing into the first explosion-proof groove 21 and the second explosion-proof groove 22 when electrolyte is injected into the battery 100, so that the problems of rust corrosion and the like of the first explosion-proof groove 21 and the second explosion-proof groove 22 are caused, the structures of the first explosion-proof groove 21 and the second explosion-proof groove 22 are stable, the influence on the performance of the battery 100 is reduced, the pressure release area of the battery 100 is increased, and the safety of the battery 100 is improved.
In some embodiments of the present utility model, as shown in fig. 3 and 4, the liquid injection hole 31 is provided on the negative electrode cap plate 3, the positive electrode cap plate 2 is an explosion-proof plate, and the first explosion-proof groove 21 and the second explosion-proof groove 22 are provided on the positive electrode cap plate 2. It will be appreciated that, since the important structures such as the polar columns exist at the positive electrode cover plate 2, the liquid injection holes 31 are formed in the negative electrode cover plate 3, so that the important structures such as the polar columns are not affected. The first explosion-proof groove 21 and the second explosion-proof groove 22 are arranged on the anode cover plate 2 and can be separated from the liquid injection hole 31, so that the problems of rust, corrosion and the like of the first explosion-proof groove 21 and the second explosion-proof groove 22 are reduced, and the structures of the first explosion-proof groove 21 and the second explosion-proof groove 22 are more stable.
In some embodiments of the present utility model, as shown in fig. 2, the first and second explosion-proof grooves 21 and 22 extend in the same direction, and the first and second explosion-proof grooves 21 and 22 are opposite to and spaced apart from each other in the width direction of the first explosion-proof groove 21. Thereby, the phenomenon that the pressure cannot be concentrated due to the communication of the first explosion-proof groove 21 and the second explosion-proof groove 22 is prevented, so that the battery 100 can normally release pressure, and the safety of the battery 100 is improved.
In some embodiments of the present utility model, as shown in fig. 2, the first explosion prevention groove 21 and the second explosion prevention groove 22 each extend in the circumferential direction of the explosion proof plate (e.g., the positive electrode cap plate 2) and are spaced apart in the center-to-edge direction of the explosion proof plate (e.g., the positive electrode cap plate 2), and the first explosion prevention groove 21 is disposed close to the center of the explosion proof plate (e.g., the positive electrode cap plate 2) with respect to the second explosion prevention groove 22. Therefore, the pressure of the battery 100 is uniformly released in the circumferential direction, the occurrence of explosion caused by pressure concentration is reduced, the safety of the battery 100 is improved, and the performance of the battery 100 is stable.
In some embodiments of the present utility model, as shown in fig. 2, the first explosion-proof groove 21 has an open ring shape having a first opening 211, and the second explosion-proof groove 22 has an open ring shape having a second opening 221, with the first opening 211 and the second opening 221 being opposite.
It will be appreciated that if the first explosion-proof groove 21 and the second explosion-proof groove 22 are both annular, when the pressure is released, the bottom walls of the first explosion-proof groove 21 and the second explosion-proof groove 22 are broken, so that a portion of the explosion-proof plate (such as the positive electrode cover plate 2) between the first explosion-proof groove 21 and the second explosion-proof groove 22 is sprung off along with the pressure release of the battery 100, thereby causing injury to the user. Therefore, by forming the first explosion-proof groove 21 and the second explosion-proof groove 22 in an open-loop shape having an opening, it is possible to prevent a portion of the explosion-proof plate (e.g., the positive electrode cap plate 2) between the first explosion-proof groove 21 and the second explosion-proof groove 22 from being sprung off as the battery 100 is depressurized, thereby improving the safety of the battery 100. In addition, the portions opposite to the first and second explosion-proof grooves 21 and 22 may be sprung up, increasing the pressure relief area, improving the efficiency of pressure relief, and further improving the safety of the battery 100.
In some embodiments of the present utility model, the first explosion proof groove 21 is an open ring shape having a first opening 211, and the second explosion proof groove 22 is a ring shape, or the first explosion proof groove 21 is a ring shape, and the second explosion proof groove 22 is a ring shape having a second opening 221.
It can be appreciated that, because one of the explosion-proof grooves is an open ring with an opening, and the other explosion-proof groove is a ring, the explosion-proof plate (such as the positive electrode cover plate 2) between the first explosion-proof groove 21 and the second explosion-proof groove 22 can be prevented from being sprung out but not sprung off along with the pressure release of the battery 100, thereby improving the safety of the battery 100, and simultaneously increasing the pressure release area of the battery 100, thereby improving the pressure release efficiency and further improving the safety of the battery 100.
In some embodiments of the present utility model, as shown in fig. 2, the width of the first opening 211 and the second opening 221 is a times the thickness of the explosion-proof plate (e.g., the positive electrode cap plate 2), and a satisfies: a is more than or equal to 0.8, and A can be 0.8, 0.9, 1.0 or 1.2, etc. It can be appreciated that A.gtoreq.0.8 can make the first opening 211 and the second opening 221 have enough widths, so that the explosion-proof plate (such as the positive electrode cover plate 2) between the first explosion-proof groove 21 and the second explosion-proof groove 22 is not easy to be sprung off along with the pressure release of the battery 100, thereby improving the safety of the battery 100.
In some embodiments of the present utility model, as shown in fig. 1 and 3, the positive electrode cap plate 2 is riveted to the case 1, and the negative electrode cap plate 3 is welded to the case 1. Therefore, the positive electrode cover plate 2 and the negative electrode cover plate 3 are firmly connected with the shell 1, and the reliability of plugging the opening 11 is improved.
In some embodiments of the present utility model, as shown in fig. 1, the case 1 is cylindrical and the battery 100 is a cylindrical battery. Thus, the shape of the case 1 in the present utility model is not limited to a cylindrical shape, and the shape of the case 1 may be a polygonal prism shape, a tapered shape, or the like as required for the production of the battery 100 of a different shape.
A battery 100 according to an embodiment of the present utility model is described below with reference to fig. 1.
As shown in fig. 1, a battery 100 according to an embodiment of the present utility model includes the above-described battery case 1.
According to the battery 100 of the embodiment of the utility model, by arranging the battery housing 1 and arranging the first explosion-proof groove 21 and the second explosion-proof groove 22 on the positive electrode cover plate 2 and the negative electrode cover plate 3 separately from the liquid injection hole 31, the first explosion-proof groove 21 and the second explosion-proof groove 22 are separated from the liquid injection hole 31, and when electrolyte is injected into the battery 100, the electrolyte can be prevented from flowing into the first explosion-proof groove 21 and the second explosion-proof groove 22, so that the problems of rust corrosion and the like of the first explosion-proof groove 21 and the second explosion-proof groove 22 are caused, the structures of the first explosion-proof groove 21 and the second explosion-proof groove 22 are stable, the influence on the performance of the battery 100 is reduced, the pressure release area of the battery 100 is increased, and the safety of the battery 100 is improved.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A battery case, comprising:
a housing having both axial ends open;
the positive cover plate and the negative cover plate are respectively connected to two ends of the shell in the axial direction so as to respectively block the two open openings of the shell, one of the positive cover plate and the negative cover plate is provided with a liquid injection hole, the other is an explosion-proof plate, and the outer surface of the other is provided with a first explosion-proof groove and a second explosion-proof groove.
2. The battery case of claim 1, wherein the liquid injection hole is formed in the negative electrode cover plate, the positive electrode cover plate is an explosion-proof plate, and the first explosion-proof groove and the second explosion-proof groove are formed in the positive electrode cover plate.
3. The battery case according to claim 1, wherein the first explosion-proof groove and the second explosion-proof groove extend in the same direction, and are arranged opposite to and at an interval from each other in the width direction of the first explosion-proof groove.
4. The battery housing of claim 3, wherein the first explosion proof groove and the second explosion proof groove each extend in a circumferential direction of the explosion proof plate and are spaced apart in a center-to-edge direction of the explosion proof plate, the first explosion proof groove being disposed proximate a center of the explosion proof plate relative to the second explosion proof groove.
5. The battery housing of claim 4, wherein the first explosion-proof groove is an open loop shape having a first opening, and the second explosion-proof groove is an open loop shape having a second opening, the first opening and the second opening being opposite.
6. The battery housing of claim 4, wherein the first explosion-proof groove is in an open loop shape having a first opening, the second explosion-proof groove is in an annular shape,
or, the first explosion-proof groove is annular, and the second explosion-proof groove is annular with a second opening.
7. The battery housing of claim 5, wherein the first and second openings have a width a times the thickness of the explosion proof panel, the a satisfying: a is more than or equal to 0.8.
8. The battery case of claim 1, wherein the positive cover plate is riveted to the housing and the negative cover plate is welded to the housing.
9. The battery case according to claim 1, wherein the housing is cylindrical.
10. A battery comprising the battery case according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320302584.2U CN219892341U (en) | 2023-02-23 | 2023-02-23 | Battery case and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320302584.2U CN219892341U (en) | 2023-02-23 | 2023-02-23 | Battery case and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219892341U true CN219892341U (en) | 2023-10-24 |
Family
ID=88409877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320302584.2U Active CN219892341U (en) | 2023-02-23 | 2023-02-23 | Battery case and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219892341U (en) |
-
2023
- 2023-02-23 CN CN202320302584.2U patent/CN219892341U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |