CN105811011A - Molding method for explosion-proof structure of lithium battery core - Google Patents
Molding method for explosion-proof structure of lithium battery core Download PDFInfo
- Publication number
- CN105811011A CN105811011A CN201410840890.7A CN201410840890A CN105811011A CN 105811011 A CN105811011 A CN 105811011A CN 201410840890 A CN201410840890 A CN 201410840890A CN 105811011 A CN105811011 A CN 105811011A
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- China
- Prior art keywords
- top board
- elastic film
- lithium cell
- cell core
- forming method
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention relates to a molding method for an explosion-proof structure of a lithium battery core. The molding method comprises the following steps: molding an air vent in a metal top board located at the top of a shell of the lithium battery core, wherein the air vent penetrates the top surface and the bottom surface of the top board; molding a carrying area at the periphery of the top of the air vent; then placing an elastic film made of a same metal material used for preparation of the top board in the carrying area; and electrically connecting one electrode with the elastic film, electrically connecting another electrode with the top board and allowing the periphery of the bottom surface of the elastic film to be completely fused on the top board by using high current. Thus, the elastic film is allowed to be closely fused together with the top board of the shell of the lithium battery core and covers over the air vent.
Description
Technical field
The present invention is related to the forming method of a kind of lithium cell core blast resistance construction, the method that the top board of espespecially a kind of housing that can make explosion-proof elastic film and lithium cell core closely fuses.
Background technology
The structure of current lithium cell core mainly includes a housing, and housing is built-in is placed with electrolyte solution and the positive plate, isolating membrane and the negative plate that adopt lamination or winding assembling mode to assemble.Wherein, after each positive plate welds with positive pole ear respectively, then being welded on the bottom of the positive terminal of housing, each negative plate welds with negative lug respectively, then is welded on the bottom of the negative terminal of housing simultaneously simultaneously.The top of positive terminal and negative terminal is then be respectively equipped with external screw thread, so as to, after screwing togather a nut respectively, fixing different binding posts respectively, with outside output power respectively.
Wherein, when charge and discharge state, it is easy to 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 top board of current lithium battery casing can iron last layer rupture pressure disc mostly, or in spot welding mode, rupture pressure disc is welded on top board, to close explosionproof hole, so as to when gas rapid expanding, break through the obstruct of rupture pressure disc, to reach the purpose of pressure release.
But, in spot welding mode, rupture pressure disc being welded on top board, because the watt level of mash welder is difficult to adjust, so that easily wearing out rupture pressure disc because power is too high during spot welding, or causing 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 rupture pressure disc in the way of heating, pressurization, then be only capable of allowing rupture pressure disc sink the combination to form wire with top board, it is not as reliable on bond quality.Consequently, it is possible to when rupture pressure disc and top board do not have complete closely sealed time, not only easily allow electrolyte solution leak, and rupture pressure disc can be allowed to pop when the gas pressure in housing is not too high, make the housing of lithium cell core to re-use and shorten service life of product.
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.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide the forming method of a kind of lithium cell core blast resistance construction, with high electric current welding elastic film and top board, so that elastic film and top board closely fuse, the bond quality solving existing rupture pressure disc is bad and the problem that makes electrolyte solution leakage and rupture pressure disc pop ahead of time.
Technical scheme is as follows:
The forming method of a kind of lithium cell core blast resistance construction comprises the following steps: that a. molding one on a top board runs through the passage of this top board end face and bottom surface；B. on top board, region is accepted in molding one, accepts region and is positioned at the top perimeter of passage；C. being placed in by an elastic film in undertaking region, elastic film and top board are identical metal；And d. is respectively with an electrode electric connection resilient thin film, electrically connects top board with another electrode, and utilize high electric current to make the bottom surface periphery of elastic film be fused to completely on top board.
During enforcement, the present invention more includes a step e, after Step d, protects adhesive tape to be attached on top board by one, and makes protection adhesive tape be positioned at the top accepting region and elastic film.
During enforcement, elastic film and top board are identical aluminum metal or copper metal.
The invention have the benefit that with high electric current welding elastic film and top board, so that elastic film and top board closely fuse, the problem that the bond quality solving existing rupture pressure disc is bad and makes electrolyte solution leakage and rupture pressure disc pop ahead of time, product quality can be effectively improved, when making the gas pressure in housing arrive preset pressure, allow rupture pressure disc pop, to avoid the waste of product and to reduce production cost, and extend the service life of product.
Accompanying drawing explanation
Fig. 1 is the perspective view of molding one passage on the top board of presently preferred embodiments of the present invention.
Fig. 2 is the perspective view that on the top board of presently preferred embodiments of the present invention, region is accepted in molding one.
Fig. 3 is the perspective view accepted in region in conjunction with an elastic film of presently preferred embodiments of the present invention.
Fig. 4 is the perspective view of laminating one protection adhesive tape on the top board of presently preferred embodiments of the present invention.
Fig. 5 is the perspective view of another embodiment of presently preferred embodiments of the present invention.
Wherein:
Top board 1 passage 11
Accept region 12 annular bottom surface 121
Elastic film 2 protects adhesive tape 3.
Detailed description of the invention
The present invention is the forming method of a kind of lithium cell core blast resistance construction, wherein, this lithium cell core has a housing, the top of housing is provided with the top board of a metal material, and this top board has an end face and a bottom surface, and this blast resistance construction is incorporated on top board, to close explosionproof hole, during so as to the gas rapid expanding in housing to the pressure set, break through the obstruct of rupture pressure disc, to reach the purpose of pressure release.
Referring to shown in Fig. 1 ~ Fig. 4, it is the preferred embodiment of forming method of lithium cell core blast resistance construction of the present invention, and it comprises the following steps:
A. the passage 11 of one end face running through top board 1 of molding and bottom surface on top board 1；
B. on top board 1, region 12 is accepted in molding one, accepts region 12 and is positioned at the top perimeter of passage 11；
C. an elastic film 2 is placed in undertaking region 12；
D. respectively with an electrode electric connection resilient thin film 2, electrically connect top board 1 with another electrode, and after two electrifying electrodes, utilize high electric current to make the bottom surface periphery of elastic film 2 be fused to completely on top board 1；And
E. protect adhesive tape 3 to be attached on top board 1 by one, and make protection adhesive tape 3 be positioned at the top accepting region 12 and elastic film 2.
Wherein, the passage 11 of step a is circular port, and the region 12 of accepting of step b is the diameter circular groove more than round vent 11, and this undertaking region 12 has an annular bottom surface 121.Elastic film 2 and the top board 1 of step c is identical aluminum metal, and elastic film 2 has the telescopic resilience of certain limit, and elastic film 2 and top board 1 are alternatively identical copper metal or ferrous metal.During enforcement, this passage 11 and undertaking region 12 can as it is shown in figure 5, passage 11 is square hole, or be also the hole of other geometry；This undertaking region 12 is square indentations, or is the groove of other geometry.
In step d, when two electrifying electrodes are with after producing high current DC electricity, the bottom surface periphery of elastic film 2 and the annular bottom surface 121 accepting region 12, namely the contact surface of elastic film 2 and top board 1 namely can because of high hot melt solution, and owing to elastic film 2 and top board 1 are identical metal, can make the bottom surface periphery of elastic film 2 comprehensive be fused on top board 1, with completely enclosed passage 11.
And in step e; when to protect adhesive tape 3 to be attached on top board 1; and when making protection adhesive tape 3 be positioned at the top accepting region 12 and elastic film 2; then can form effective protection on the surface of elastic film 2; prevent elastic film 2 from causing elastic change because being scraped off, to guarantee that elastic film 2 can reach the function that expection is explosion-proof.
Therefore, the present invention has the advantage that
1, the bottom surface periphery of the elastic film of the present invention can be combined closely completely with the annular bottom surface accepting region of top board, when gas pressure in housing arrives preset pressure, rupture pressure disc just can be allowed to pop, therefore, the product waste caused because rupture pressure disc pops ahead of time can be prevented effectively from, and extend the service life of product.
2, the present invention is with the annular bottom surface accepting region of the bottom surface periphery of high electric current welding elastic film with top board, therefore, not only easy to process, quick, and 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 not only easy to process, quick, and production cost can be reduced, and product quality can be effectively improved, to extend the forming method of the lithium cell core blast resistance construction in product service life.
Above-described embodiment is only for clearly demonstrating the invention example, and is not the restriction to the invention detailed description of the invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.All any apparent changes extended out within the spirit and principles in the present invention or variation are still among the protection domain of present claims.
Claims (4)
1. a forming method for lithium cell core blast resistance construction, lithium cell core has a housing, and the top of this housing is provided with the top board of a metal material, and this top board has an end face and a bottom surface, it is characterised in that forming method comprises the following steps:
A. on top board, molding one runs through the passage of this top board end face and bottom surface；
B. on top board, region is accepted in molding one, and this undertaking region is positioned at the top perimeter of this passage；
C. being placed in by an elastic film in this undertaking region, this elastic film and this top board are identical metal；And
D. electrically connect this elastic film with an electrode respectively, electrically connect this top board with another electrode, and utilize high electric current to make the bottom surface periphery of this elastic film be fused to completely on this top board.
2. the forming method of lithium cell core blast resistance construction as claimed in claim 1, it is characterised in that after Step d, also include a step e: protect adhesive tape to be attached on this top board by, and make this protection adhesive tape be positioned at the top of this undertaking region and this elastic film.
3. the forming method of lithium cell core blast resistance construction as claimed in claim 1 or 2, it is characterised in that this elastic film and this top board are identical aluminum metal.
4. the forming method of lithium cell core blast resistance construction as claimed in claim 1 or 2, it is characterised in that this elastic film and this top board are identical copper metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410840890.7A CN105811011A (en) | 2014-12-29 | 2014-12-29 | Molding method for explosion-proof structure of lithium battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410840890.7A CN105811011A (en) | 2014-12-29 | 2014-12-29 | Molding method for explosion-proof structure of lithium battery core |
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| Publication Number | Publication Date |
|---|---|
| CN105811011A true CN105811011A (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410840890.7A Pending CN105811011A (en) | 2014-12-29 | 2014-12-29 | Molding method for explosion-proof structure of lithium battery core |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001266827A (en) * | 2000-03-21 | 2001-09-28 | Yuasa Corp | Sealed battery |
| CN102035037A (en) * | 2009-09-28 | 2011-04-27 | 深圳市比克电池有限公司 | Battery and cap structure thereof |
| CN202019008U (en) * | 2011-05-09 | 2011-10-26 | 温州市民扬电池新材料有限公司 | Explosion-proof cover plate of lithium battery |
| CN202067846U (en) * | 2010-12-13 | 2011-12-07 | 深圳市比克电池有限公司 | Explosion-proof cover plate of lithium ion battery |
| CN102437293A (en) * | 2011-12-20 | 2012-05-02 | 刘立文 | Anti-explosion cover plate of lithium ion battery |
| CN204045660U (en) * | 2014-09-16 | 2014-12-24 | 浙江中泽电气有限公司 | A kind of lithium battery anti-explosion valve structure |
-
2014
- 2014-12-29 CN CN201410840890.7A patent/CN105811011A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001266827A (en) * | 2000-03-21 | 2001-09-28 | Yuasa Corp | Sealed battery |
| CN102035037A (en) * | 2009-09-28 | 2011-04-27 | 深圳市比克电池有限公司 | Battery and cap structure thereof |
| CN202067846U (en) * | 2010-12-13 | 2011-12-07 | 深圳市比克电池有限公司 | Explosion-proof cover plate of lithium ion battery |
| CN202019008U (en) * | 2011-05-09 | 2011-10-26 | 温州市民扬电池新材料有限公司 | Explosion-proof cover plate of lithium battery |
| CN102437293A (en) * | 2011-12-20 | 2012-05-02 | 刘立文 | Anti-explosion cover plate of lithium ion battery |
| CN204045660U (en) * | 2014-09-16 | 2014-12-24 | 浙江中泽电气有限公司 | A kind of lithium battery anti-explosion valve structure |
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Application publication date: 20160727 |