CN1632967A - Lithium battery combined cover plate and lithium battery comprising the same - Google Patents
Lithium battery combined cover plate and lithium battery comprising the same Download PDFInfo
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- CN1632967A CN1632967A CNA2003101176099A CN200310117609A CN1632967A CN 1632967 A CN1632967 A CN 1632967A CN A2003101176099 A CNA2003101176099 A CN A2003101176099A CN 200310117609 A CN200310117609 A CN 200310117609A CN 1632967 A CN1632967 A CN 1632967A
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- cover plate
- lithium battery
- matrix
- rupture pressure
- pressure disc
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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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Abstract
This invention discloses a lithium battery combination cover plate and its lithium batter with it. The lithium battery combination cover plate comprises inner cover plate and cover cap, wherein the inner cover plate comprises metal cover plate base with explosion proof holes and explosion proof film with the holes. The said explosion proof film is tightly connected with the cover base. The said cover cap comprises metal pas and covers the cover plate through isolation part with air exit holes.
Description
Technical field
The present invention relates to the explosion-proof technology of lithium battery.
Background technology
Along with being extensive use of of mobile communication product, lithium battery the field should be arranged also in continuous expansion, the core of lithium battery then is electric core, electric core then is made up of shell, electrode slice, electrolyte, barrier film.
The voltage height, the life-span is long, energy density is high, characteristics such as light are the advantage places of lithium battery, but its fatal weakness is that its fail safe is poorer than other secondary cells, existing both at home and abroad many claim incidents that cause because of the lithium battery blast, Canadian certain company is more because the blast of lithium battery and announcement of bankruptcy.Therefore, fail safe becomes all productions and uses one of problem of the maximum that lithium battery runs into.
At present, prevent that the method for battery explosion from having: 1) in combination plate, be provided with lead foil, aluminium foil, constitute pressure relief safety valve (Chinese patent CN1200199, CN1138753A); 2) adopt Sheet Metal Forming Technology on cover plate or housing, to go out the indentation of certain depth, in the hope of reaching the purpose of explosion under certain pressure; 3) blast hole of on Aluminum cover, setting up defences, and outside explosionproof hole vacuum cold welding aluminium foil.The safety valve structure complexity of method 1, the manufacturing cost height; Method 2 punch press precision are difficult to guarantee that add the wearing and tearing and the distortion of upper punch, the consistency of the degree of depth of indentation is difficult to control, and reliability is too poor in the batch production process.Method 3 is not only to the required precision height of process equipment, system complex, and the manufacturing cost height, and because rupture pressure disc places electric core outside, very easily artificial damaged.
Summary of the invention
The technical problem to be solved in the present invention is the defective that overcomes prior art, propose a kind of make easy, cost is low, the high lithium battery cover plate of stability, and proposes a kind of new lithium battery on this basis.
Lithium battery combination plate among the present invention comprises inner cover plate and block, and described inner cover plate comprises metal cover board matrix that has explosionproof hole and the rupture pressure disc that covers explosionproof hole, and is closely affixed between described rupture pressure disc and the cover plate matrix; Described block comprises sheet metal and by insulator described cover plate is covered, have bleeder port on described insulator.
Insulator in the such scheme can be plastics or plastic cement.
Matrix in the cover plate in the such scheme can be stainless steel, Ni sheet or plating Ni steel disc, and rupture pressure disc can be Copper Foil, Ni paper tinsel, aluminium foil or lead foil.
Can welding between rupture pressure disc and the cover plate matrix.Welding can be with welding as scolder with nickel chromium triangle borosilicate alloy.
Lithium battery among the present invention, with above-mentioned combination plate as battery cover board.Can use a closely affixed utmost point as battery of cover plate matrix and shell, described sheet metal passes described cover plate matrix by the conductive connecting piece insulation and is connected with another utmost point of battery.Described closely affixed can be laser welding.
The battery that adopts the battery cover board among the present invention to make, when cell internal pressure reaches Initiation Pressure, rupture pressure disc will be out of shape, and break, and pressure is released, and can avoid the generation of security incident.Because the thickness of rupture pressure disc is easy to control, the consistency of Initiation Pressure is very high.Simultaneously, the protective effect to rupture pressure disc is also played in the existence of block.In addition, this kind structure also is convenient to and electrical appliance between spot welding.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the battery among the present invention;
Capping structure schematic diagram among the embodiment of the combination plate among Fig. 2 the present invention;
Fig. 3 is the inner cover plate structural representation among the embodiment of the combination plate among the present invention;
Fig. 4 is the vertical view of Fig. 2;
Fig. 5 is the vertical view of Fig. 3.
Embodiment
Below in conjunction with embodiment the present invention is specifically described.
Fig. 1 is the structural representation of an embodiment of the battery among the present invention.Among the figure, the 1st, battery case, interior loading electrolyte, electrode etc. are sealed battery as battery cover board with the combination plate among the present invention.Can cover plate base 2 and battery container 1 be welded by the mode of laser welding.
Combination plate among the present invention comprises inner cover plate shown in Figure 3 and block shown in Figure 2.Wherein, the 2nd, the cover plate matrix of inner cover plate can be stainless steel, Ni sheet or plating Ni steel disc etc., has explosionproof hole on the cover plate matrix 2, this explosionproof hole is covered by rupture pressure disc 3.Rupture pressure disc 3 can be Copper Foil, Ni paper tinsel, aluminium foil or lead foil etc.Weld between cover plate matrix and the rupture pressure disc.In one embodiment, cover plate matrix 2 is used stainless steel material, about thickness 0.5mm, goes out an explosionproof hole thereon, and explosionproof hole can adopt square, circle or ellipse garden type etc., and present embodiment adopts runway shape, and is shown in Figure 5.Proportional because of rupture pressure disc pressure and explosionproof hole area, therefore, the explosionproof hole area is big more, opens quick-friedly easily more, adopts the run-track shaped space that makes full use of cover plate, improves and opens quick-fried effective area.Rupture pressure disc 3 adopts Copper Foil, can be rolled copper foil, and shape is identical with explosionproof hole, and area is more bigger than explosionproof hole.Adopt solder to weld between rupture pressure disc and the explosionproof hole, as Copper Foil is overlayed on the explosionproof hole, scolder is washed into identical with rupture pressure disc shape, overlay between matrix and the Copper Foil, under the environment of vacuum furnace, melt solder links together base material and Copper Foil.Scolder can be with nickel chromium triangle borosilicate alloy.
The thickness of rupture pressure disc can be got 0.01～0.02mm, and is very easily artificial damaged because of its mechanical strength is lower, causes battery to scrap, so block is covered on the cover plate, plays the protective effect to rupture pressure disc.Block comprises sheet metal 4 and around the insulator 6 of sheet metal, described cover plate is covered, have bleeder port 5 on described insulator 6.In one embodiment, block is made up of stainless steel substrates and plastics, and about the thick 0.05mm of stainless steel substrates, the center raises up, last convex surface and the parallel electrode as battery of convex surface not.Around stainless steel substrates, make inserts with plastics, the cast moulding is contained in stainless steel substrates in the moulding, opens bleeder port 5 near the stainless steel substrates place in working of plastics, shown in Fig. 2 and 4.Bleeder port can be one, also can be a plurality of, and the embodiment that provides as Fig. 4 adopts three bleeder ports.
Claims (7)
1, a kind of lithium battery combination plate is characterized in that, comprises inner cover plate and block, and described inner cover plate comprises metal cover board matrix (2) that has explosionproof hole and the rupture pressure disc (3) that covers explosionproof hole, and is closely affixed between described rupture pressure disc (3) and the cover plate matrix (2); Described block comprises sheet metal (4) and by insulator (6) described cover plate is covered, have bleeder port (5) on described insulator (6).
2, the described lithium battery combination plate of claim 1 is characterized in that, described insulator (6) is plastics or plastic cement.
3, the described lithium battery combination plate of claim 1 is characterized in that, described cover plate matrix (2) is stainless steel, Ni sheet or plating Ni steel disc, and described rupture pressure disc (3) is Copper Foil, Ni paper tinsel, aluminium foil or lead foil.
4, the described lithium battery combination plate of claim 3 is characterized in that, welding between described rupture pressure disc (3) and the cover plate matrix (2).
5, the described lithium battery combination plate of claim 4 is characterized in that, welds as scolder with nickel chromium triangle borosilicate alloy between described rupture pressure disc (3) and the cover plate matrix (2).
6, a kind of lithium battery comprises shell (1), electrode, electrolyte, it is characterized in that, uses the described lithium battery combination plate of the arbitrary claim of claim 1 to 4 as battery cover.
7, the described lithium battery of claim 6 is characterized in that, the described cover plate matrix (2) and the tight affixed utmost point of shell as battery, and described sheet metal (4) passes described cover plate matrix (2) by conductive connecting piece (7) with insulating and is connected with another utmost point of battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101176099A CN1632967A (en) | 2003-12-22 | 2003-12-22 | Lithium battery combined cover plate and lithium battery comprising the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101176099A CN1632967A (en) | 2003-12-22 | 2003-12-22 | Lithium battery combined cover plate and lithium battery comprising the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1632967A true CN1632967A (en) | 2005-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101176099A Pending CN1632967A (en) | 2003-12-22 | 2003-12-22 | Lithium battery combined cover plate and lithium battery comprising the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1632967A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800299A (en) * | 2010-04-13 | 2010-08-11 | 天津三合意电子有限公司 | Explosion-proof membrane on cover plate of power lithium ion battery electrode and welding method thereof |
| CN102403467A (en) * | 2011-11-10 | 2012-04-04 | 深圳市豪鹏科技有限公司 | Explosion-proof secondary battery |
| CN102414879A (en) * | 2009-04-27 | 2012-04-11 | 加拿大巴斯姆有限公司 | Electrode and electrode material for lithium electrochemical cells |
| CN101304078B (en) * | 2007-05-09 | 2012-05-23 | 深圳市比克电池有限公司 | Explosion-proof battery |
| CN106058133A (en) * | 2016-08-15 | 2016-10-26 | 系统电子科技（镇江）有限公司 | Nickel-plated steel sheet for battery module |
| CN108515263A (en) * | 2018-03-29 | 2018-09-11 | 东莞市力星激光科技有限公司 | Laser welding method for explosion-proof sheet of aluminum-shell battery cover plate |
-
2003
- 2003-12-22 CN CNA2003101176099A patent/CN1632967A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101304078B (en) * | 2007-05-09 | 2012-05-23 | 深圳市比克电池有限公司 | Explosion-proof battery |
| CN102414879A (en) * | 2009-04-27 | 2012-04-11 | 加拿大巴斯姆有限公司 | Electrode and electrode material for lithium electrochemical cells |
| CN102414879B (en) * | 2009-04-27 | 2015-04-15 | 加拿大巴斯姆有限公司 | Electrodes and electrode material for lithium electrochemical cells |
| CN101800299A (en) * | 2010-04-13 | 2010-08-11 | 天津三合意电子有限公司 | Explosion-proof membrane on cover plate of power lithium ion battery electrode and welding method thereof |
| CN102403467A (en) * | 2011-11-10 | 2012-04-04 | 深圳市豪鹏科技有限公司 | Explosion-proof secondary battery |
| CN106058133A (en) * | 2016-08-15 | 2016-10-26 | 系统电子科技（镇江）有限公司 | Nickel-plated steel sheet for battery module |
| CN106058133B (en) * | 2016-08-15 | 2018-09-21 | 系统电子科技（镇江）有限公司 | A kind of battery modules nickel plating steel disc |
| CN108515263A (en) * | 2018-03-29 | 2018-09-11 | 东莞市力星激光科技有限公司 | Laser welding method for explosion-proof sheet of aluminum-shell battery cover plate |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |