CN204632837U - Lithium cell core pressure relief - Google Patents
Lithium cell core pressure relief Download PDFInfo
- Publication number
- CN204632837U CN204632837U CN201520259987.9U CN201520259987U CN204632837U CN 204632837 U CN204632837 U CN 204632837U CN 201520259987 U CN201520259987 U CN 201520259987U CN 204632837 U CN204632837 U CN 204632837U
- Authority
- CN
- China
- Prior art keywords
- cushion rubber
- region
- film
- lithium cell
- cell core
- 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.)
- Withdrawn - After Issue
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
A kind of lithium cell core pressure relief, be located on the top board on a lithium cell core housing top, top board is provided with the undertaking region to lower recess, and accept region and have an annular bottom surface, annular bottom surface is positioned at the top perimeter of an air vent hole.Once on cushion rubber, a film, cushion rubber and a retainer plate are from bottom to top laminated in undertaking region, and lower cushion rubber and upper cushion rubber can be out of shape and the sticking cushion rubber of tool after being heated.Whereby, can after the heating, following cushion rubber and upper cushion rubber adhesive film and retainer plate, and following cushion rubber be bonded in accept region annular bottom surface above, make the top board of film and lithium cell core form close adhesion, to be covered on the top of air vent hole.
Description
Technical field
The utility model is relevant a kind of lithium cell core pressure relief, espespecially a kind of pressure relief that can make the top board close adhesion of the housing of explosion-proof film and lithium cell core.
Background technology
The structure of current lithium cell core mainly comprises a housing, built-in positive plate, barrier film and the negative plate being placed with electrolyte solution and adopting lamination or winding assembling mode to assemble of housing.Wherein, each positive plate respectively with positive pole ear welding, then is welded on the bottom of positive terminal of housing simultaneously, and each negative plate respectively with negative lug welding, then is welded on the bottom of negative terminal of housing simultaneously.And the top of positive terminal and negative terminal is respectively equipped with external screw thread, so as to after screwing togather a nut respectively, fix different binding posts respectively, with outside output power.
Wherein, when charge and discharge state, easily allow the electrolyte solution temperature in housing rise, and produce gas.And in order to prevent the rapid expanding because of gas from making case fragmentation, the top board of current lithium cell core housing can iron the explosion-proof film of last layer mostly, or in spot welding mode, explosion-proof film point is welded on top board, with closed explosionproof hole, so as to when gas rapid expanding, break through the obstruct of explosion-proof film, to reach the object of pressure release.
But be welded on top board in spot welding mode by explosion-proof film point, the watt level because of spot welding machine is difficult to adjust, so that easily wear out explosion-proof film because power is too high during spot welding, or cause rosin joint phenomenon because power is too little, make product quality be difficult to control.And if utilize a heater directly to be ironed on top board by explosion-proof film in the mode of heating, pressurization, then explosion-proof film only can be allowed to sink to form the combination of wire with top board, and it is not in conjunction with quality being also very reliable.Thus, when explosion-proof film and top board do not have complete closely sealed time, not only easily allow electrolyte solution leak, and can gas pressure in housing not too high time allow explosion-proof film pop, make the housing of lithium cell core cannot re-use and shorten the useful life of product.
Utility model content
In view of this, in order to provide a kind of structure being different from prior art, and improve above-mentioned shortcoming, inventor amasss experience for many years and constantly researches and develops improvement, then has generation of the present utility model.
An object of the present utility model providing more than one, lower cushion rubber clamps a film, relend and can be out of shape after being heated and the sticking characteristic of tool by upper and lower cushion rubber, to make the lithium cell core pressure relief of film and top board close adhesion, the existing explosion-proof film of enable solution bad and electrolyte solution is leaked and the problem that pops ahead of time of explosion-proof film in conjunction with quality, and effectively can improve product quality, when making the gas pressure in housing arrive preset pressure, explosion-proof film is allowed to pop, reduce production cost to avoid the waste of product, and extend the useful life of product.
For reaching the object of above-mentioned utility model, a kind of lithium cell core pressure relief set by the utility model, be located on the top board on a lithium cell core housing top, top board has an air vent hole, air vent hole covers a film; Its main technical characterstic is: top board is provided with the undertaking region to lower recess, accepts region and is communicated with air vent hole, accept region and have annular bottom surface, and annular bottom surface is positioned at the top perimeter of air vent hole; Once to be out of shape after being heated and the sticking lower cushion rubber of tool is placed in and accepts in region, and be bonded in the top of annular bottom surface; One film is placed in be accepted in region, and is bonded in the top of lower cushion rubber; Once to be out of shape after being heated and the sticking upper cushion rubber of tool is placed in and accepts in region, and be bonded in the top of film; And a retainer plate is bonded in the top of cushion rubber.
During enforcement, undertaking region is circular recess, and air vent hole is circular port, and the diameter of circular recess is greater than the diameter of air vent hole.
During enforcement, the outer peripheral edges shape of lower cushion rubber is greater than the outer peripheral edges shape of film, and the outer peripheral edges shape of upper cushion rubber is also greater than the outer peripheral edges shape of film.
During enforcement, the bottom surface of upper cushion rubber has annular region in the first external annular region and first, and the end face of lower cushion rubber has annular region in the second external annular region and second, and the first external annular region is bonded in the top of the second external annular region.
During enforcement, accept region and have annular facade, retainer plate has circular periphery, and the outer peripheral edges of the end face of upper cushion rubber are provided with vertical ring, and vertical ring is folded between annular facade and circular periphery.
The beneficial effects of the utility model are:
Lithium cell core pressure relief of the present utility model, a film is clamped with upper and lower cushion rubber, relend and can be out of shape after being heated and the sticking characteristic of tool by upper and lower cushion rubber, to make film and top board close adhesion, the bad and electrolyte solution is leaked and the problem that pops ahead of time of explosion-proof film in conjunction with quality of existing explosion-proof film can be solved, and effectively can improve product quality, when making the gas pressure in housing arrive preset pressure, explosion-proof film is allowed to pop, reduce production cost to avoid the waste of product, and extend the useful life of product.
For ease of having a better understanding the utility model, hereby describe in detail as after.
Accompanying drawing explanation
Fig. 1 is the element exploded view of the first embodiment of the present utility model.
Fig. 2 is the three-dimensional appearance schematic diagram of the first embodiment of the present utility model.
Fig. 3 is the a-a ' profile of Fig. 2.
Fig. 4 is the partial enlarged drawing of Fig. 3 A part.
Fig. 5 is the combination generalized section of the second embodiment of the present utility model.
[main element symbol description]
Lithium cell core pressure relief 1 top board 2
Accept region 21 annular bottom surface 211
Annular facade 212 air vent hole 22
Lower cushion rubber 3 second external annular region 31
Annular region 32 film 4 in second
Upper cushion rubber 5 first external annular region 51
In first, annular region 52 founds ring 53
Retainer plate 6 circular periphery 61.
Embodiment
The utility model is a kind of lithium cell core pressure relief, wherein, lithium cell core has a housing, the top of housing is provided with a top board, and top board has an end face and a bottom surface, and pressure relief is incorporated on top board, with closed vent hole, during so as to the gas rapid expanding in housing to the pressure set, break through the obstruct of explosion-proof film, to reach the object of pressure release.
Refer to shown in Fig. 1 ~ Fig. 4, it is the first embodiment of the utility model lithium cell core pressure relief 1, comprises from bottom to top sequentially stacked and is contained in cushion rubber 5 and a retainer plate 6 on cushion rubber once 3, film 4, in the undertaking region 21 of top board 2.Wherein, lower cushion rubber 3, upper cushion rubber 5 and retainer plate 6 are respectively an annular slab, and film 4 is the sheet metal of aluminium foil and so on.
Air vent hole 22 on top board 2 is a circular port, accepting region 21 for diameter is greater than the circular groove of round vent 22 diameter, accept region 21 with air vent hole 22, there is same axle center and to be upper and lowerly communicated with, accept region 21 and have an annular bottom surface 211, annular bottom surface 211 is positioned at the top perimeter of air vent hole 22.During enforcement, air vent hole 22 also can be square hole, or is other geometries, and accepts region 21 and also can be square indentations, or is the groove of other geometries.
Lower cushion rubber 3 and upper cushion rubber 5 are respectively and can be out of shape and the sticking cushion rubber of tool after being heated, such as: the cushion rubber of PUR and so on.The end face of lower cushion rubber 3 has annular region 32 in the second external annular region 31 and second, and the bottom surface of upper cushion rubber 5 has annular region 52 in the first external annular region 51 and first.Film 4 is folded between lower cushion rubber 3 and upper cushion rubber 5, and the outer peripheral edges diameter of lower cushion rubber 3 is greater than the diameter of film 4, and the outer peripheral edges diameter of upper cushion rubber 5 is greater than the diameter of film 4.During enforcement, the outer peripheral edges shape of lower cushion rubber 3 and upper cushion rubber 5 also can be other geometries, and the outer peripheral edges shape of lower cushion rubber 3 and upper cushion rubber 5 is greater than the outer peripheral edges shape of film 4 respectively.
Instantly cushion rubber 3, film 4, upper cushion rubber 5 and retainer plate 6 are from bottom to top sequentially stacked and be contained in the undertaking region 21 of top board 2, and when the bottom surface of lower cushion rubber 3 is contacted with the annular bottom surface 211 accepting region 21, via pressurization, the program of heating, namely lower cushion rubber 3 and upper cushion rubber 5 can be made to melt, the bottom surface of lower cushion rubber 3 is bondd with the annular bottom surface 211 accepting region 21, lower cushion rubber 3 end face second in annular region 32, second external annular region 31 respectively with the bottom surface of film 4 and the first outer ring 51 area bonded of upper cushion rubber 5 bottom surface, in the end face of film 4 and first of upper cushion rubber 5 bottom surface, annular region 52 bonds, the end face of upper cushion rubber 5 is then the bottom surface being bonded in retainer plate 6.
Refer to shown in Fig. 5, it is the second embodiment of the utility model lithium cell core pressure relief, itself and the first embodiment difference are: accept region 21 and have an annular facade 212, retainer plate 6 has a circular periphery 61, the outer peripheral edges of the end face of upper cushion rubber 5 are provided with a vertical ring 53, this vertical ring 53 is upwards extended by the outer peripheral edges of the end face of upper cushion rubber 5 and forms, and vertical ring 53 is sandwiched and be bonded between annular facade 212 and circular periphery 61.Whereby, can comprehensive to lower cushion rubber 3, film 4, upper cushion rubber 5 and retainer plate 6 be bonded in the undertaking region 21 of top board 2, with complete closed vent hole 22.
Therefore, the utility model has following advantage:
1, film energy tight bond of the present utility model is in the undertaking region of top board, when gas pressure in housing arrives preset pressure, film just can be allowed to pop, therefore, effectively can avoid the product waste caused because explosion-proof film pops ahead of time, and extend the useful life of product.
2, the utility model can be out of shape after being heated with upper and lower cushion rubber and the sticking characteristic of tool with make each element formed tight bond, therefore, not only easy to process, quick, can production cost be reduced, and effectively can improve product quality.
In sum, according to content disclosed above, the utility model really can reach the object of expection, there is provided one that film and top board can not only be made to be formed to bond closely, can make easy to process, quick to reduce production cost, and effectively can improve product quality to extend the lithium cell core pressure relief in product useful life, have the value that industry utilizes, whence proposes utility application in accordance with the law.
Claims (6)
1. a lithium cell core pressure relief, be located on the top board on a lithium cell core housing top, this top board has an air vent hole, this air vent hole covers a film; It is characterized in that:
This top board is provided with one to the undertaking region of lower recess, and this undertaking region is communicated with this air vent hole, and this undertaking region has an annular bottom surface, and this annular bottom surface is positioned at the top perimeter of this air vent hole;
Once to be out of shape after being heated and the sticking lower cushion rubber of tool is placed in this undertaking region, this lower cushion rubber is bonded in the top of this annular bottom surface;
One film is placed in this undertaking region, and this film is bonded in the top of this lower cushion rubber;
Once to be out of shape after being heated and the sticking upper cushion rubber of tool is placed in this undertaking region, on this, cushion rubber is bonded in the top of this film; And
One retainer plate, is bonded in the top of cushion rubber on this.
2. lithium cell core pressure relief as claimed in claim 1, it is characterized in that: this undertaking region is circular recess, this air vent hole is circular port, and the diameter of this circular recess is greater than the diameter of this air vent hole.
3. lithium cell core pressure relief as claimed in claim 1, is characterized in that: the outer peripheral edges shape of this lower cushion rubber is greater than the outer peripheral edges shape of this film.
4. lithium cell core pressure relief as claimed in claim 1 or 2, is characterized in that: on this, the outer peripheral edges shape of cushion rubber is greater than the outer peripheral edges shape of this film.
5. lithium cell core pressure relief as claimed in claim 1 or 2, it is characterized in that: on this, the bottom surface of cushion rubber has annular region in one first external annular region and one first, the end face of this lower cushion rubber has annular region in one second external annular region and one second, and this first external annular region is bonded in the top of this second external annular region.
6. lithium cell core pressure relief as claimed in claim 1, it is characterized in that: this undertaking region has an annular facade, this retainer plate has a circular periphery, and on this, the outer peripheral edges of the end face of cushion rubber are provided with a vertical ring, and this vertical ring is folded between this annular facade and this circular periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520259987.9U CN204632837U (en) | 2015-04-27 | 2015-04-27 | Lithium cell core pressure relief |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520259987.9U CN204632837U (en) | 2015-04-27 | 2015-04-27 | Lithium cell core pressure relief |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204632837U true CN204632837U (en) | 2015-09-09 |
Family
ID=54051834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520259987.9U Withdrawn - After Issue CN204632837U (en) | 2015-04-27 | 2015-04-27 | Lithium cell core pressure relief |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204632837U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552253A (en) * | 2016-01-31 | 2016-05-04 | 谢振华 | Explosion-proof valve structure for lithium battery and processing technology for explosion-proof valve structure |
| CN106159156A (en) * | 2015-04-27 | 2016-11-23 | 迪吉亚节能科技股份有限公司 | Lithium cell core pressure relief |
| EP3772120A1 (en) * | 2019-07-30 | 2021-02-03 | Contemporary Amperex Technology Co., Limited | Battery module, secondary battery and cap plate assembly thereof |
-
2015
- 2015-04-27 CN CN201520259987.9U patent/CN204632837U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159156A (en) * | 2015-04-27 | 2016-11-23 | 迪吉亚节能科技股份有限公司 | Lithium cell core pressure relief |
| CN106159156B (en) * | 2015-04-27 | 2018-07-27 | 迪吉亚节能科技股份有限公司 | Lithium cell core pressure relief |
| CN105552253A (en) * | 2016-01-31 | 2016-05-04 | 谢振华 | Explosion-proof valve structure for lithium battery and processing technology for explosion-proof valve structure |
| EP3772120A1 (en) * | 2019-07-30 | 2021-02-03 | Contemporary Amperex Technology Co., Limited | Battery module, secondary battery and cap plate assembly thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150909 Effective date of abandoning: 20180727 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150909 Effective date of abandoning: 20180727 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |