CN219917474U - Explosion-proof piece line of support structure and lithium cell - Google Patents
Explosion-proof piece line of support structure and lithium cell Download PDFInfo
- Publication number
- CN219917474U CN219917474U CN202321017992.XU CN202321017992U CN219917474U CN 219917474 U CN219917474 U CN 219917474U CN 202321017992 U CN202321017992 U CN 202321017992U CN 219917474 U CN219917474 U CN 219917474U
- Authority
- CN
- China
- Prior art keywords
- explosion
- lithium battery
- score line
- proof sheet
- support structure
- 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.)
- Active
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 50
- 238000003466 welding Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 15
- 230000009172 bursting Effects 0.000 claims 2
- 238000004880 explosion Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 9
- 238000007789 sealing Methods 0.000 description 7
- 230000037303 wrinkles Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to the field of batteries, in particular to a support structure for a explosion-proof sheet and a lithium battery. The technical problem that a scribing position of an explosion-proof piece of a lithium battery without a top cover model is easy to damage or break in the prior art is solved.
Description
Technical Field
The utility model relates to the field of lithium batteries, in particular to an explosion-proof sheet scribing supporting structure and a lithium battery.
Background
When the lithium battery without the top cover model is assembled, the welding area of the explosion-proof piece (the welding area is arranged at the circle center plane of the explosion-proof piece) is required to be welded, and when the welding is carried out, a certain force is generated to enable the welding area to deform downwards under the stress, so that the gap generated when an external die assembly is welded with the explosion-proof piece is overlarge, the welding is not carried out, the scribing line of the explosion-proof piece is used as a weak point of a product, and the battery performance is damaged or broken easily when the welding is stressed, so that the battery is scrapped even.
Disclosure of Invention
In order to solve the technical problem that a scribing line of an explosion-proof piece of a lithium battery without a top cover model is easy to damage or break in the prior art, the utility model provides an explosion-proof piece scribing support structure and the lithium battery, and the technical problem is solved.
The technical scheme adopted for solving the technical problems is as follows:
in one aspect, the present utility model provides a burst disk score line support structure for a lithium battery, comprising: the support ring is formed by overturning and folding the outer edge of the explosion-proof piece towards the inside of the lithium battery, and is paved on one side of the score line so as to block the deformation path of the explosion-proof piece; and the scribing line is formed on the periphery of the welding area of the explosion-proof piece, and the opening of the scribing line faces the interior of the lithium battery.
Further, the outer edge of the explosion-proof sheet is provided with annular containing grooves for containing the supporting rings which are gradually narrowed in the overturning and folding process.
Further, one end of the accommodating groove is opened.
Further, a gap is reserved between the support ring and the explosion-proof sheet.
Further, the score line is wide at the opening side and gradually narrowed inward.
The utility model further provides a lithium battery, which comprises the explosion-proof sheet scribing support structure.
Further, a seal is included that directly envelops the rupture disc and the support ring.
Further, a housing is included that envelops the seal.
Further, a distance is left in the radial direction between the inner most part of the housing and seal envelope onto the rupture disc and the support ring and the score line.
Based on the technical scheme, the utility model has the following technical effects:
according to the explosion-proof sheet scribing support structure, the outer edge of the explosion-proof sheet is turned and folded towards the inside of the lithium battery to form the support ring, the support ring is paved on one side of the scribing line and is blocked on the deformation path of the explosion-proof sheet, the scribing line is formed on the periphery of the welding area of the explosion-proof sheet, the opening of the scribing line faces the inside of the lithium battery, the scribing line formed on the periphery of the welding area can enable deformation of the explosion-proof sheet to be predictable, namely, deformation starts from the scribing line, when an external module is welded with the explosion-proof sheet, the welding area of the explosion-proof sheet is stressed, deformation of the explosion-proof sheet starts from the scribing line towards the inside of the lithium battery, the support ring is blocked on the deformation path of the explosion-proof sheet to support and limit the explosion-proof sheet which is about to deform excessively, and further deformation of the explosion-proof sheet is prevented, so that the technical problem that the scribing line of the explosion-proof sheet of the lithium battery without a top cover in the prior art is easy to damage or break is solved.
According to the scribing supporting structure of the explosion-proof sheet, the outer edge of the explosion-proof sheet is provided with the containing grooves which are distributed annularly so as to contain the supporting rings which are gradually narrowed in the overturning and folding process. Specifically, the larger the radial length of the supporting ring is, the larger the straight edge height of the outer edge of the explosion-proof sheet before overturning is required, the material part of the outer edge of the explosion-proof sheet is easy to be fed when the supporting ring is overturned and folded, namely, the redundant volume of material can move in other directions, so that the inner ring of the supporting ring cannot form a whole circle and is uneven, wrinkles appear, or the diameter of the outermost ring of the outer edge of the explosion-proof sheet before overturning is large, and the largest outer ring of the outer edge of the explosion-proof sheet after overturning and folding is formed into the innermost ring of the supporting ring with obviously smaller diameter, so that overlapping wrinkles of the material can be inevitably generated, the processing of subsequent procedures is not facilitated, and the service life of the lithium battery is influenced. The outer edge of the explosion-proof sheet is provided with the containing grooves which are annularly distributed, so that materials which are overlapped and folded originally are contained in the containing grooves in the overturning and folding process, namely, the supporting ring which is gradually narrowed in the overturning and folding process is contained, and the technical problem that the outer edge of the explosion-proof sheet can form folds on the supporting ring after overturning and folding is solved.
In the lithium battery, a certain distance is reserved between the part, which is enveloped by the shell and the sealing piece, of the innermost ring on the explosion-proof piece and the supporting ring and the score line in the radial direction. Specifically, the shell of the lithium battery needs to be enveloped and sealed, and the innermost ring of the shell and the innermost ring of the supporting ring have certain damage to the scribing line, so that the damage is reduced, and the innermost ring of the shell and the innermost ring of the supporting ring can not act on the position of the scribing line in the whole process of enveloping and sealing the shell of the lithium battery, so that the scribing line is prevented from being damaged.
Drawings
FIG. 1 is a schematic view of the overall structure of the burst disk score line support structure of the present utility model;
FIG. 2 is a bottom view of the burst disk score line support structure of the present utility model;
fig. 3 is a schematic view of a portion of the structure of the lithium battery of the present utility model.
Wherein: 1-explosion-proof sheets, 11-supporting rings, 12-score lines, 13-welding areas and 14-accommodating grooves; 2-a seal; 3-a shell.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
As shown in fig. 1-2, the present utility model provides a supporting structure for a rupture disc, which is particularly suitable for a lithium battery without a top cover, and comprises a supporting ring 11 and a score line 12, wherein the supporting ring 11 is formed by overturning and folding the outer edge of the rupture disc 1 towards the interior of the lithium battery, the supporting ring 11 is laid on one side of the score line 12 so as to block the deformation path of the rupture disc 1, the score line 12 is formed at the periphery of a welding area 13 of the rupture disc 1, and the opening of the score line 12 faces the interior of the lithium battery.
According to the explosion-proof sheet scribing support structure, the outer edge of the explosion-proof sheet 1 is turned and folded towards the inside of the lithium battery to form the support ring 11, the support ring 11 is paved on one side of the scribing line 12 and is blocked on a deformation path of the explosion-proof sheet 1, the scribing line 12 is formed on the periphery of the welding area 13 of the explosion-proof sheet 1, an opening of the scribing line 12 faces the inside of the lithium battery, the scribing line 12 formed on the periphery of the welding area 13 can enable deformation of the explosion-proof sheet 1 to be predictable, namely, the deformation starts from the scribing line 12, when an external die assembly is welded with the explosion-proof sheet 1, the welding area 13 of the explosion-proof sheet 1 is stressed, the explosion-proof sheet 1 starts to deform towards the inside of the lithium battery from the scribing line 12, the support ring 11 is blocked on the deformation path of the explosion-proof sheet 1 to support and limit the explosion-proof sheet 1 to be deformed excessively, and further deformation of the explosion-proof sheet 1 is prevented, so that the technical problems that the position of the scribing line 12 of the explosion-proof sheet 1 of the lithium battery without a top cover model in the prior art is easy to damage or fracture are solved, the technical scheme is low in cost, the process is simple, no new components are added, the lithium battery is required, the lithium battery service life is prolonged, and the service life is not prolonged.
It should be noted that the present utility model is mainly aimed at the lithium battery without top cover model, for the lithium battery with top cover model, only the top cover is welded during the welding of the lithium battery, the problem that the explosion-proof sheet 1 deforms due to the welding on the explosion-proof sheet 1 does not exist, meanwhile, for the lithium battery with top cover model, a separation sheet is configured between the explosion-proof sheet 1 and the connecting sheet, the separation sheet is used for separating the explosion-proof sheet 1 and the connecting sheet, and the separation sheet is made of plastic material, the hardness is not enough, and even if the gasket is at the position of the score line 12, the gasket cannot bear the acting force when the explosion-proof sheet 1 made of metal material deforms.
In a preferred embodiment of the utility model, the outer edge of the rupture disc 1 is provided with annularly distributed receiving grooves 14 for receiving the support ring 11 which narrows during the flip-over folding. Specifically, the larger the radial length of the supporting ring 11 is, the larger the straight edge height of the outer edge of the explosion-proof sheet 1 before turning is required, the material part of the outer edge of the explosion-proof sheet 1 is easy to be moved during turning and folding, namely, the redundant volume of material can move in other directions, so that the inner ring of the supporting ring 11 cannot form a whole circle and is uneven, wrinkles appear, or the diameter of the outermost ring of the outer edge of the explosion-proof sheet 1 before turning is large, and the largest outer ring of the outer edge of the explosion-proof sheet 1 after turning and folding is formed into the innermost ring of the supporting ring 11 with obviously smaller diameter, so that overlapping wrinkles of the material can be inevitably generated, the processing of the subsequent procedures is not facilitated, and the service life of the lithium battery is influenced. The outer edge of the explosion-proof sheet 1 is provided with the containing grooves 14 which are annularly distributed, so that materials which are overlapped and folded originally are contained in the containing grooves 14 in the process of overturning and folding, namely, the supporting ring 11 which is gradually narrowed in the process of overturning and folding is contained, and the technical problem that the outer edge of the explosion-proof sheet 1 can form folds on the supporting ring 11 after overturning and folding is solved.
Further, one end of the accommodating groove 14 is opened to facilitate feeding.
In one embodiment of the utility model, a gap is left between the support ring 11 and the rupture disk 1 to allow a theoretical space for the roll-over folding process to fit reality, so as to prevent the support ring 11 from being excessively pressed against the rupture disk 1, so as not to cause deformation of the rupture disk 1 toward the outside of the lithium battery.
In one embodiment of the present utility model, the score 12 is wide at the open side and tapers inwardly to provide pressure relief protection in the event of excessive internal pressure in the lithium battery.
As shown in fig. 3, another aspect of the present utility model further provides a lithium battery, including the above-mentioned explosion-proof sheet scribe line support structure.
Further, the lithium battery of the utility model further comprises a sealing element 2, and the sealing element 2 is directly enveloped on the explosion-proof sheet 1 and the supporting ring 11 to play a role of sealing and isolating.
Further, the lithium battery of the present utility model further comprises a case 3, and the case 3 is enveloped on the sealing member 2.
In a preferred embodiment of the utility model, the part of the housing 3 and the seal 2 that envelops the innermost ring on the rupture disc 1 and the support ring 11 is at a distance in the radial direction from the score line 12. Specifically, the casing 3 of the lithium battery needs to be enveloped and sealed, and the innermost ring of the casing 3 and the innermost ring of the supporting ring 11 have certain damage to the score line 12, so that the damage is reduced, and in the whole process of enveloping and sealing the casing 3 of the lithium battery, the innermost ring of the casing 3 and the innermost ring of the supporting ring 11 cannot act on the position of the score line 12, so as to prevent the score line 12 from being damaged.
It should be understood that the above-described specific embodiments are only for explaining the present utility model and are not intended to limit the present utility model. Obvious variations or modifications which extend from the spirit of the present utility model are within the scope of the present utility model.
Claims (9)
1. An explosion proof piece score line bearing structure for lithium cell, its characterized in that includes:
the support ring (11) is formed by overturning and folding the outer edge of the explosion-proof sheet (1) towards the inside of the lithium battery, and the support ring (11) is paved on one side of the score line (12) so as to block the deformation path of the explosion-proof sheet (1);
and the scribing line (12) is formed on the periphery of the welding area (13) of the explosion-proof sheet (1), and the opening of the scribing line (12) faces the interior of the lithium battery.
2. The support structure of the bursting disc score line according to claim 1, characterized in that the outer edge of the bursting disc (1) is provided with annularly distributed receiving grooves (14) for receiving the supporting ring (11) which narrows gradually during the overturning and folding process.
3. The rupture disc score line support structure of claim 2, wherein the receiving slot (14) is open at one end.
4. The rupture disc score line support structure according to claim 1, characterized in that a gap is left between the support ring (11) and the rupture disc (1).
5. The rupture disc score line support structure of claim 1, wherein the score line (12) is wide on the open side and tapers inwardly.
6. A lithium battery comprising the burst disk score line support structure of any one of claims 1-5.
7. The lithium battery according to claim 6, further comprising a seal (2), said seal (2) being directly enveloped on the rupture disc (1) and the support ring (11).
8. The lithium battery according to claim 7, further comprising a housing (3), said housing (3) enveloping said seal (2).
9. Lithium battery according to claim 8, characterized in that the casing (3) and seal (2) envelop to the explosion-proof disc (1) and the innermost part of the support ring (11) with a distance in the radial direction from the score line (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321017992.XU CN219917474U (en) | 2023-04-29 | 2023-04-29 | Explosion-proof piece line of support structure and lithium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321017992.XU CN219917474U (en) | 2023-04-29 | 2023-04-29 | Explosion-proof piece line of support structure and lithium cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219917474U true CN219917474U (en) | 2023-10-27 |
Family
ID=88465040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321017992.XU Active CN219917474U (en) | 2023-04-29 | 2023-04-29 | Explosion-proof piece line of support structure and lithium cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219917474U (en) |
-
2023
- 2023-04-29 CN CN202321017992.XU patent/CN219917474U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4191806A (en) | Pressure vent for a sealed primary cell | |
| JP3241483U (en) | Power battery can and power battery | |
| EP3223333B1 (en) | Rechargeable battery | |
| CN102549802A (en) | Double-sealed cap assembly and cylindrical secondary battery comprising same | |
| CN219917474U (en) | Explosion-proof piece line of support structure and lithium cell | |
| US6346342B1 (en) | Battery having pressure relief mechanism formed in container | |
| CN102386358B (en) | Bursting disc and lithium ion battery with same | |
| CN114278772A (en) | Electrochemical energy storage device safety valve | |
| CN214411340U (en) | Lithium battery and electronic equipment thereof | |
| US3070446A (en) | Food package | |
| JP3244025U (en) | Battery cover for new cylindrical lithium battery and new cylindrical lithium battery | |
| US3839092A (en) | Electro-chemical, gasproof button cell | |
| CN112002861A (en) | Battery explosion-proof valve | |
| CN219917475U (en) | Explosion-proof piece line-marking structure and battery cap body | |
| EP2768042B1 (en) | Electrochemical cell | |
| CN112290160A (en) | Explosion-proof structure of cylindrical battery | |
| CN201112445Y (en) | Columned secondary battery cover component and battery using the same | |
| CN221239734U (en) | Battery pack and apparatus | |
| CN210794225U (en) | Positioning easy-to-tear bottle cap | |
| JPH0350611Y2 (en) | ||
| CN213401433U (en) | Explosion-proof structure of cylindrical battery | |
| JPH04269449A (en) | Battery | |
| CN219216001U (en) | Easy-to-open combined bottle cap | |
| US9493138B2 (en) | Obturating element, gas generator provided with the latter and method for manufacturing same | |
| US20230323973A1 (en) | Emergency degassing valve apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |