CN106159156A - Lithium cell core pressure relief - Google Patents
Lithium cell core pressure relief Download PDFInfo
- Publication number
- CN106159156A CN106159156A CN201510204308.2A CN201510204308A CN106159156A CN 106159156 A CN106159156 A CN 106159156A CN 201510204308 A CN201510204308 A CN 201510204308A CN 106159156 A CN106159156 A CN 106159156A
- Authority
- CN
- China
- Prior art keywords
- cushion rubber
- region
- thin 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.)
- Granted
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
Abstract
A kind of lithium cell core pressure relief, is located on the top board on a lithium cell core housing top, and top board is provided with the undertaking region of concave downward, accepts region and has an annular bottom surface, and annular bottom surface is positioned at the top perimeter of a passage.Once cushion rubber, a thin film, in cushion rubber and a ring for fixing are from bottom to top laminated in undertaking region on one, and lower cushion rubber and upper cushion rubber are for deforming and have sticking cushion rubber after being heated.Whereby, can after the heating, following cushion rubber and upper cushion rubber adhesive film and ring for fixing, and following cushion rubber is bonded in above the annular bottom surface accepting region, makes the top board of thin film and lithium cell core form close adhesion, to be covered on the top of passage.
Description
Technical field
The present invention is relevant a kind of lithium cell core pressure relief, a kind of pressure relief that can make explosion-proof thin film and the top board close adhesion of the housing of lithium cell core.
Background technology
The structure of lithium cell core mainly includes a housing at present, and housing is built-in is placed with electrolyte solution and the positive plate, isolating membrane and the negative plate that use lamination or winding assembling mode to assemble.Wherein, each positive plate welds with positive pole ear respectively, then is welded on the bottom of the positive terminal of housing simultaneously, and each negative plate welds with negative lug respectively, then is welded on the bottom of the 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 from making case fragmentation because of the rapid expanding of gas, the explosion-proof thin film of last layer mostly can be ironed at present on the top board of lithium cell core housing, or in spot welding mode, explosion-proof film point is welded on top board, to close explosionproof hole, so as to when gas rapid expanding, break through the obstruct of explosion-proof thin film, to reach the purpose of pressure release.
But, in spot welding mode, explosion-proof film point is welded on top board, because the watt level of mash welder is difficult to adjust, so that easily wear out explosion-proof thin film during spot welding because power is the highest, or causes rosin joint phenomenon because power is the least, make product quality be difficult to control.And if utilize a heater directly to be ironed on top board by explosion-proof thin film in the way of heating, pressurization, then be only capable of allowing explosion-proof thin film sink the combination to form wire with top board, it is not the most the most reliable in quality combining.Thus, when explosion-proof thin film and top board do not have complete closely sealed time, the most easily allow electrolyte solution leak, and explosion-proof thin film can be allowed when the gas pressure in housing is the most too high to pop, make the housing of lithium cell core cannot re-use and shorten the service life of product.
Summary of the invention
In view of this, in order to provide a kind of structure being different from prior art, and improving above-mentioned shortcoming, inventor amasss experience for many years and constantly researches and develops improvement, then has the generation of the present invention.
The main object of the present invention provide more than one, lower cushion rubber clamp a thin film, relend and can be deformed and have sticking characteristic after being heated by upper and lower cushion rubber, so that thin film and the lithium cell core pressure relief of top board close adhesion, the problem that the combination quality of the enable existing explosion-proof thin film of solution is bad and makes electrolyte solution leakage and explosion-proof thin film pop ahead of time, and product quality can be effectively improved, when making the gas pressure in housing arrive preset pressure, explosion-proof thin film is allowed to pop, reduce production cost to avoid the waste of product, and extend the service life of product.
In order to achieve the above object, a kind of lithium cell core pressure relief set by the present invention is located on the top board on a lithium cell core housing top, and top board has a passage, and passage covers a thin film；Its main technical characterstic is: top board is provided with the undertaking region of concave downward, accepts region and connects with passage, accepts region and has annular bottom surface, and annular bottom surface is positioned at the top perimeter of passage；Can deform and have sticking lower cushion rubber after being heated to be placed in undertaking region, and be bonded in the top of annular bottom surface；One thin film is placed in undertaking region, and is bonded in the top of lower cushion rubber；Can deform and have sticking upper cushion rubber after being heated to be placed in undertaking region, and be bonded in the top of thin film；And a ring for fixing is bonded in the top of cushion rubber.
During enforcement, undertaking region is circular trough, and passage is circular port, and the diameter of circular trough is more than the diameter of passage.
During enforcement, the outer peripheral edge shape of lower cushion rubber is more than the outer peripheral edge shape of thin film, and the outer peripheral edge shape of upper cushion rubber is also more than the outer peripheral edge shape of thin film.
During enforcement, the bottom surface of upper cushion rubber has the first external annular region and the first annular region, and the end face of lower cushion rubber has the second external annular region and the second annular region, and the first external annular region is bonded in the top of the second external annular region.
During enforcement, accepting region and have annular facade, ring for fixing has circular periphery, and the outer peripheral edge of the end face of upper cushion rubber is provided with vertical ring, and vertical ring is folded between annular facade and circular periphery.
For further appreciating that the present invention, below lift preferred embodiment, coordinate graphic, figure number, the concrete constitution content of the present invention and effect of being reached thereof are described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the element exploded view of the first embodiment of the present invention.
Fig. 2 is the three-dimensional appearance schematic diagram of the first embodiment of the present invention.
Fig. 3 is the a-a ' profile of Fig. 2.
Fig. 4 is the partial enlarged drawing of a part of Fig. 3.
Fig. 5 is the combination generalized section of the second embodiment of the present invention.
[main element symbol description]
Lithium cell core pressure relief 1
Top board 2
Accept region 21
Annular bottom surface 211
Annular facade 212
Passage 22
Lower cushion rubber 3
Second external annular region 31
Second annular region 32
Thin film 4
Upper cushion rubber 5
First external annular region 51
First annular region 52
Vertical ring 53
Ring for fixing 6
Circular periphery 61.
Detailed description of the invention
The present invention 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, to close passage, during so as to the gas rapid expanding in housing to the pressure set, break through the obstruct of explosion-proof thin film, to reach the purpose of pressure release.
Referring to shown in Fig. 1 ~ Fig. 4, it is the first embodiment of lithium cell core pressure relief 1 of the present invention, including the most sequentially stacking and be contained in cushion rubber 5 and a ring for fixing 6 on cushion rubber once 3, thin film 4, accepted in region 21 of top board 2.Wherein, lower cushion rubber 3, upper cushion rubber 5 and ring for fixing 6 are respectively an annular slab, and thin film 4 is the sheet metal of aluminium foil etc.
Passage 22 on top board 2 is a circular port, accept region 21 and be more than the circular groove of round vent 22 diameter for diameter, accept region 21 there is with passage 22 same axle center and upper and lower connect, accepting region 21 and have an annular bottom surface 211, annular bottom surface 211 is positioned at the top perimeter of passage 22.During enforcement, passage 22 can be also square hole, or is other geometries, and accepting region 21 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 deform and have sticking cushion rubber after being heated, such as: the cushion rubber of PUR etc.The end face of lower cushion rubber 3 has the second external annular region 31 and the second annular region 32, and the bottom surface of upper cushion rubber 5 has the first external annular region 51 and the first annular region 52.Thin film 4 is folded between lower cushion rubber 3 and upper cushion rubber 5, and the outer peripheral edge diameter of lower cushion rubber 3 is more than the diameter of thin film 4, and the outer peripheral edge diameter of upper cushion rubber 5 is more than the diameter of thin film 4.During enforcement, the outer peripheral edge shape of lower cushion rubber 3 and upper cushion rubber 5 also can be other geometries, and the outer peripheral edge shape of lower cushion rubber 3 and upper cushion rubber 5 is respectively greater than the outer peripheral edge shape of thin film 4.
Instantly cushion rubber 3, thin film 4, upper cushion rubber 5 and ring for fixing 6 the most sequentially stacking in being contained in the undertaking region 21 of top board 2, and when making the bottom surface of lower cushion rubber 3 contact with the annular bottom surface 211 accepting region 21, via pressurization, the program of heating, lower cushion rubber 3 and upper cushion rubber 5 i.e. can be made to melt, the bottom surface making lower cushion rubber 3 bonds with the annular bottom surface 211 accepting region 21, second annular region 32 of lower cushion rubber 3 end face, second external annular region 31 respectively with the bottom surface of thin film 4 and the first outer ring 51 area bonded of upper cushion rubber 5 bottom surface, the end face of thin film 4 bonds with the first annular region 52 of upper cushion rubber 5 bottom surface, the end face of upper cushion rubber 5 is then the bottom surface being bonded in ring for fixing 6.
Refer to shown in Fig. 5, it is the second embodiment of lithium cell core pressure relief of the present invention, it is with first embodiment difference: accepts region 21 and has an annular facade 212, ring for fixing 6 has a circular periphery 61, the outer peripheral edge of the end face of upper cushion rubber 5 is provided with one and founds ring 53, this vertical ring 53 is upwardly extended by the outer peripheral edge of the end face of upper cushion rubber 5 and forms, and vertical ring 53 is sandwiched and is bonded between annular facade 212 and circular periphery 61.Whereby, can be by the undertaking region 21 being bonded in top board 2 comprehensive to lower cushion rubber 3, thin film 4, upper cushion rubber 5 and ring for fixing 6, with completely enclosed passage 22.
Therefore, the present invention has the advantage that
1, the thin film energy tight bond of the present invention is in the undertaking region of top board, when gas pressure in housing arrives preset pressure, thin film just can be allowed to pop, therefore, the product waste caused because explosion-proof thin film pops ahead of time can be prevented effectively from, and extend the service life of product.
2, the present invention can deform and have sticking characteristic with upper and lower cushion rubber so that each element forms tight bond after being heated, therefore, the most easy to process, quick, can reduce production cost, and can be effectively improved product quality.
In sum, according to content disclosed above, the present invention really can reach intended purpose, there is provided one that thin film and top board can not only be made to form bonding closely, can make easy to process, quickly to reduce production cost, and product quality can be effectively improved to extend the lithium cell core pressure relief in product service life, the value that great industry utilizes, whence proposes application for a patent for invention in accordance with the law.
Claims (6)
1. a lithium cell core pressure relief, is located on the top board on a lithium cell core housing top, and this top board has a passage, and this passage covers a thin film；It is characterized in that:
This top board is provided with the undertaking region of a concave downward, and this undertaking region connects with this passage, and this undertaking region has an annular bottom surface, and this annular bottom surface is positioned at the top perimeter of this passage；
Can deform and have sticking lower cushion rubber after being heated to be placed in this undertaking region, this lower cushion rubber is bonded in the top of this annular bottom surface；
One thin film is placed in this undertaking region, and this thin film is bonded in the top of this lower cushion rubber；
Can deform and have sticking upper cushion rubber after being heated to be placed in this undertaking region, on this, cushion rubber is bonded in the top of this thin film；And
One ring for fixing, is bonded in the top of cushion rubber on this.
2. lithium cell core pressure relief as claimed in claim 1, it is characterised in that: this undertaking region is circular trough, and this passage is circular port, and the diameter of this circular trough is more than the diameter of this passage.
3. lithium cell core pressure relief as claimed in claim 1, it is characterised in that: the outer peripheral edge shape of this lower cushion rubber is more than the outer peripheral edge shape of this thin film.
4. lithium cell core pressure relief as claimed in claim 1 or 2, it is characterised in that: on this, the outer peripheral edge shape of cushion rubber is more than the outer peripheral edge shape of this thin 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 one first external annular region and one first annular region, the end face of this lower cushion rubber has one second external annular region and one second annular region, 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 ring for fixing has a circular periphery, and on this, the outer peripheral edge of the end face of cushion rubber is provided with one and founds 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 |
|---|---|---|---|
| CN201510204308.2A CN106159156B (en) | 2015-04-27 | 2015-04-27 | Lithium cell core pressure relief |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510204308.2A CN106159156B (en) | 2015-04-27 | 2015-04-27 | Lithium cell core pressure relief |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106159156A true CN106159156A (en) | 2016-11-23 |
| CN106159156B CN106159156B (en) | 2018-07-27 |
Family
ID=57347161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510204308.2A Expired - Fee Related CN106159156B (en) | 2015-04-27 | 2015-04-27 | Lithium cell core pressure relief |
Country Status (1)
| Country | Link |
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| CN (1) | CN106159156B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022069562A1 (en) * | 2020-09-30 | 2022-04-07 | Hugo Benzing Gmbh & Co. Kg | Burst protection cover for a container |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201673952U (en) * | 2010-05-20 | 2010-12-15 | 东莞市科锐机电设备有限公司 | Dual safety explosion-proof device of power lithium battery |
| KR20110100473A (en) * | 2010-03-04 | 2011-09-14 | 주)제원 Csc | Glass gasket for electric double layer capacitor, method of manufacturing a glass gasket, electric double layer capacitor using a glass gasket, and method of manufacturing a electric double layer capacitor |
| CN202308122U (en) * | 2011-09-29 | 2012-07-04 | 力神迈尔斯动力电池系统有限公司 | Aluminum membrane type explosion-proof valve of high-capacity lithium ion battery |
| CN202797128U (en) * | 2012-09-20 | 2013-03-13 | 迪吉亚节能科技股份有限公司 | Lithium battery core with explosion-proof structure |
| CN204632837U (en) * | 2015-04-27 | 2015-09-09 | 迪吉亚节能科技股份有限公司 | Lithium cell core pressure relief |
-
2015
- 2015-04-27 CN CN201510204308.2A patent/CN106159156B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110100473A (en) * | 2010-03-04 | 2011-09-14 | 주)제원 Csc | Glass gasket for electric double layer capacitor, method of manufacturing a glass gasket, electric double layer capacitor using a glass gasket, and method of manufacturing a electric double layer capacitor |
| CN201673952U (en) * | 2010-05-20 | 2010-12-15 | 东莞市科锐机电设备有限公司 | Dual safety explosion-proof device of power lithium battery |
| CN202308122U (en) * | 2011-09-29 | 2012-07-04 | 力神迈尔斯动力电池系统有限公司 | Aluminum membrane type explosion-proof valve of high-capacity lithium ion battery |
| CN202797128U (en) * | 2012-09-20 | 2013-03-13 | 迪吉亚节能科技股份有限公司 | Lithium battery core with explosion-proof structure |
| CN204632837U (en) * | 2015-04-27 | 2015-09-09 | 迪吉亚节能科技股份有限公司 | Lithium cell core pressure relief |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022069562A1 (en) * | 2020-09-30 | 2022-04-07 | Hugo Benzing Gmbh & Co. Kg | Burst protection cover for a container |
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| Publication number | Publication date |
|---|---|
| CN106159156B (en) | 2018-07-27 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |