CN103296227A - Power type lithium ion battery cover and welding process thereof - Google Patents
Power type lithium ion battery cover and welding process thereof Download PDFInfo
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- CN103296227A CN103296227A CN201310184326XA CN201310184326A CN103296227A CN 103296227 A CN103296227 A CN 103296227A CN 201310184326X A CN201310184326X A CN 201310184326XA CN 201310184326 A CN201310184326 A CN 201310184326A CN 103296227 A CN103296227 A CN 103296227A
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- pad
- pressure disc
- rupture pressure
- upper cap
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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
Abstract
The invention relates to a power type lithium ion battery cover and a welding process thereof. An upper cover, a gasket and an anti-explosion film are embedded into a sealing ring; a pore plate and the anti-explosion film are subjected to laser spot welding; more than two downward convex welding points are uniformly arranged on the lower surface of the edge of the upper cover, and the convex height of the welding points is greater than the thickness of the gasket; the upper cover is sequentially in resistance welding with the gasket and the bottom surfaces in a cavity of the anti-explosion film through the more than two convex welding points; the bottom face of the anti-explosion film is provided with an annular pressure-relief notching groove; the wall of an inner hole of the gasket corresponds to the annular pressure-relief notching groove. The upper cover is sequentially in resistance welding with the gasket and the bottom surfaces in the cavity of the anti-explosion film along the downward convex welding points, is matched with the inner hole of the gasket and corresponds to the anti-explosion film with the annular pressure-relief notching groove in the bottom face, so as to reduce the inner resistance of the whole battery cover and stabilize anti-explosion pressure relief. The power type lithium ion battery cover is simple in connection structure, stable in connection, low in deformation and malposition possibility and low in whole inner resistance; by adoption of the power type lithium ion battery cover, the battery has high performance, stable anti-explosion performance, high safety performance and long service life.
Description
Technical field
The present invention relates to the lithium ion battery field, is a kind of lithium ion power-type battery cap and welding procedure thereof specifically.
Background technology
Lithium ion battery cover is the critical component of lithium ion battery, and reliability, useful life, amount of capacity, producers and consumers that it is directly connected to lithium ion battery produce use safety.The internal resistance size of lithium ion power-type battery cap directly influences the useful life of lithium ion battery and overcharges, crosses and put performance, and more big its self discharge of lithium ion battery internal resistance is just more big, thereby influences the capacity of whole battery.The method of existing reduction lithium ion battery cover internal resistance is laser welding and ultrasonic bonding, its shortcoming is: the processing cost height, and upper cap coating destructible causes getting rusty, and solder joint fusion area is little or not prison welding solid, when being subjected to sealing convergent force, easily break, thereby make the interior resistive of block big.
Summary of the invention
Reduce the drawback that exists in the lithium ion battery cover internal resistance in the prior art in order to solve, the invention provides that a kind of to take into account block internal resistance reduction and capping structure stable, guarantee the battery anti-explosion stable performance, produce the lithium ion power-type battery cap that uses safety, its welding procedure is simple, cost is low, Welding Metallurgy is in conjunction with firm, the internal resistance no change.
The technical solution used in the present invention is: a kind of lithium ion power-type battery cap, comprise upper cap, rupture pressure disc, orifice plate, pad and sealing ring, upper cap, pad and rupture pressure disc are flush-mounted in the sealing ring, the bottom surface of sealing ring is packed with orifice plate, orifice plate and rupture pressure disc laser spot welding, upper cap is provided with a plurality of pores, its technical characterstic is that described upper cap shade lower surface evenly is provided with more than two the solder joint to lower convexity, the solder joint height of projection is greater than spacer thickness, upper cap through the solder joint of projection more than two successively with pad, rupture pressure disc cavity inner bottom surface resistance welded; The bottom surface of described rupture pressure disc is provided with annular pressure release cutting, and the endoporus hole wall of pad is corresponding with annular pressure release cutting.
The inside bending of annular body of wall of described sealing ring superscribes block, pad and rupture pressure disc.
The welding procedure of lithium ion power-type battery cap may further comprise the steps:
(1) by dimensional requirement punching out upper cap, pad, rupture pressure disc, orifice plate, pad and sealing ring, and on upper cap, process 2-4 solder joint of lower surface by the downward punching out of upper surface, and spot size is less than 0.8mm, and solder joint height is greater than spacer thickness, pressing product nickel plating, thickness of coating are the 5-7 micron;
(2) ultrasonic wave cleans and electroplates good upper cap, pad, rupture pressure disc, orifice plate, pad and sealing ring in cleaning fluid, ultrasonic oscillation 4-5 minute, uses clear water rinsing 2-3 time again, heating, drying after the rinsing;
(3) welding upper cap, pad and rupture pressure disc, cylinder precompressed upper cap solder joint contacts with pad, utilize both self-resistances to lead to heavy-current discharge, make the solder joint contact site produce high temperature melt pad and rupture pressure disc, reach solder joint, pad and rupture pressure disc metallurgical binding, welding charging voltage 600V, cylinder precompressed air pressure 0.35-0.45Mpa, squeeze time 4-6S, weld time, 2-3S welded dwell time 8-10S; The rupture pressure disc body of wall bending of welding back superscribes the block shade;
(4) rupture pressure disc that will be welded with upper cap is flush-mounted in the sealing ring, at rupture pressure disc central circular jig bottom surface laser spot welding, finishes the welding of lithium ion power-type battery cap.
Adopt above technical scheme, the invention has the beneficial effects as follows:
1, the corresponding pad endoporus of the annular pressure release cutting hole wall of rupture pressure disc, in the inside battery pressure-bearing, when temperature raises, the rupture pressure disc pressurized outwards is turned to rupture pressure disc and pops in the process, pad pushes against rupture pressure disc annular pressure release cutting periphery all the time, when the rupture pressure disc pressurized, rupture pressure disc annular pressure release cutting periphery is played position-limiting action, guarantee the upwards upset of rupture pressure disc shape pressure release cutting inner round portion, and by pad endoporus hole wall the annular pressure release cutting of rupture pressure disc is played cutting action, guarantee that effectively the rupture pressure disc upset pops in annular pressure release cutting place fracture, make the inside battery pressure release, improve the battery usage safety performance, no hidden peril of explosion;
2, upper cap shade lower surface evenly is provided with the solder joint of projection more than two, more than two the projection solder joint successively with pad, rupture pressure disc inner chamber bottom surface resistance welded, the heat that the resistance of workpiece itself produces by big electric current partial discharge is with the local metallurgical binding of each workpiece, thereby reduce the internal resistance of whole lithium ion power-type battery cap, be conducive to improve the finished product battery capacity, increase the number of times that discharges and recharges capable of circulation, improve the battery serviceability; The bending of rupture pressure disc sealing ring body of wall superscribes block, pad and explosion-proof desert, and the integral installation structure is firm, further improves security performance and useful life.
The present invention adopt under the upper cap shade projection welding point successively with pad, rupture pressure disc inner chamber bottom surface resistance welded, the corresponding setting of rupture pressure disc of tie spacer endoporus and bottom surface band shape pressure release cutting, realize the reduction of whole internal resistance and stablizing of explosion-proof relief, its syndeton is simple, connects stable, not yielding, dislocation, whole internal resistance is low, the battery performance height, and explosion-proof performance is stable, the security performance height, long service life.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is A place enlarged drawing among Fig. 1.
Among the figure: upper cap 1, solder joint 11, pad 2, rupture pressure disc 3, annular pressure release cutting 31, circular weld platform 32, orifice plate 4, sealing ring 5, bending body of wall 51.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1, shown in 2, a kind of lithium ion power-type battery cap comprises upper cap 1, pad 2, rupture pressure disc 3, orifice plate 4 and sealing ring 5, upper cap 1 is provided with a plurality of pores, upper cap 1, pad 2 and rupture pressure disc 3 are flush-mounted in sealing ring 5 outer rings by bending body of wall 51 parcels of sealing ring 5, the bottom surface of the inner ring of sealing ring 5 is packed with orifice plate 4, circular weld platform 32 laser spot weldings of orifice plate 4 and rupture pressure disc 3, upper cap 1 shade lower surface evenly is provided with more than two the solder joint 11 to lower convexity, solder joint 11 heights of projection are greater than pad 2 thickness, upper cap 1 through the solder joint 11 of projection more than two successively with pad 2, rupture pressure disc 3 cavity inner bottom surface resistance welded; The bottom surface of rupture pressure disc 3 is provided with annular pressure release cutting 31, and the endoporus hole wall of pad 2 is corresponding with annular pressure release cutting 31.
Welding procedure of the present invention may further comprise the steps:
(1) by dimensional requirement punching out upper cap, pad, rupture pressure disc, orifice plate, pad and sealing ring, and on upper cap, process 2-4 solder joint of lower surface by the downward punching out of upper surface, and spot size is less than 0.8mm, and solder joint height is greater than spacer thickness, pressing product nickel plating, thickness of coating are the 5-7 micron;
(2) ultrasonic wave cleans and electroplates good upper cap, pad, rupture pressure disc, orifice plate, pad and sealing ring in cleaning fluid, ultrasonic oscillation 4-5 minute, uses clear water rinsing 2-3 time again, heating, drying after the rinsing;
(3) welding upper cap, pad and rupture pressure disc, cylinder precompressed upper cap solder joint contacts with pad, utilize both self-resistances to lead to heavy-current discharge, make the solder joint contact site produce high temperature melt pad and rupture pressure disc, reach solder joint, pad and rupture pressure disc metallurgical binding, welding charging voltage 600V, cylinder precompressed air pressure 0.35-0.45Mpa, squeeze time 4-6S, weld time, 2-3S welded dwell time 8-10S; The rupture pressure disc body of wall bending of welding back superscribes the block shade;
(4) rupture pressure disc that will be welded with upper cap is flush-mounted in the sealing ring, at rupture pressure disc central circular jig bottom surface laser spot welding, finishes the welding of lithium ion power-type battery cap.
Claims (3)
1. lithium ion power-type battery cap, comprise upper cap, rupture pressure disc, orifice plate, pad and sealing ring, upper cap, pad and rupture pressure disc are flush-mounted in the sealing ring, sealing ring bottom surface setting-in orifice plate, orifice plate and rupture pressure disc laser spot welding, upper cap is provided with a plurality of pores, it is characterized in that: described upper cap shade lower surface evenly is provided with more than two the solder joint to lower convexity, the solder joint height of projection is greater than spacer thickness, upper cap through the solder joint of projection more than two successively with pad, rupture pressure disc cavity inner bottom surface resistance welded; The bottom surface of described rupture pressure disc is provided with annular pressure release cutting, and the endoporus hole wall of pad is corresponding with annular pressure release cutting.
2. lithium ion power-type battery cap according to claim 1, it is characterized in that: the inside bending of annular body of wall of described sealing ring superscribes block, pad and rupture pressure disc.
3. the welding procedure of the described lithium ion power-type of claim 1 battery cap is characterized in that may further comprise the steps:
(1) by dimensional requirement punching out upper cap, pad, rupture pressure disc, orifice plate, pad and sealing ring, and on upper cap, process 2-4 solder joint of lower surface by the downward punching out of upper surface, and spot size is less than 0.8mm, and solder joint height is greater than spacer thickness, pressing product nickel plating, thickness of coating are the 5-7 micron;
(2) ultrasonic wave cleans and electroplates good upper cap, pad, rupture pressure disc, orifice plate, pad and sealing ring in cleaning fluid, ultrasonic oscillation 4-5 minute, uses clear water rinsing 2-3 time again, heating, drying after the rinsing;
(3) welding upper cap, pad and rupture pressure disc, cylinder precompressed upper cap solder joint contacts with pad, utilize both self-resistances to lead to heavy-current discharge, make the solder joint contact site produce high temperature melt pad and rupture pressure disc, reach solder joint, pad and rupture pressure disc metallurgical binding, welding charging voltage 600V, cylinder precompressed air pressure 0.35-0.45Mpa, squeeze time 4-6S, weld time, 2-3S welded dwell time 8-10S;
(4) rupture pressure disc that will be welded with upper cap is flush-mounted in the sealing ring, and the bending of sealing ring body of wall superscribes block, at rupture pressure disc central circular jig bottom surface laser spot welding orifice plate, finishes the welding of lithium ion power-type battery cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310184326XA CN103296227A (en) | 2013-05-20 | 2013-05-20 | Power type lithium ion battery cover and welding process thereof |
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| CN201310184326XA CN103296227A (en) | 2013-05-20 | 2013-05-20 | Power type lithium ion battery cover and welding process thereof |
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| CN103296227A true CN103296227A (en) | 2013-09-11 |
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| CN201310184326XA Pending CN103296227A (en) | 2013-05-20 | 2013-05-20 | Power type lithium ion battery cover and welding process thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769780A (en) * | 2013-12-26 | 2014-05-07 | 合肥国轩高科动力能源股份公司 | Method for welding lithium ion battery stainless steel head cover and copper sheet |
| CN105428560A (en) * | 2015-12-30 | 2016-03-23 | 泰兴市振兴电子有限公司 | Power-type lithium battery low-resistance cover cap |
| CN105470418A (en) * | 2015-12-30 | 2016-04-06 | 泰兴市振兴电子有限公司 | Cylindrical lithium battery cap |
| CN108886122A (en) * | 2016-03-25 | 2018-11-23 | 三洋电机株式会社 | Cylindrical battery |
| CN109807461A (en) * | 2019-03-20 | 2019-05-28 | 江阴海虹精密机械有限公司 | The Friction Stir Welding line and its welding procedure of complicated water runner water-cooled plate |
| CN110253142A (en) * | 2019-07-03 | 2019-09-20 | 伊欧激光科技（苏州）有限公司 | The automatic assembling device of cylindrical lithium ion cell cap |
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| CN201532972U (en) * | 2009-09-25 | 2010-07-21 | 天津佰特瑞电子有限公司 | Lithium ion power battery cover for preventing internal resistance from drifting |
| CN101807674A (en) * | 2010-04-13 | 2010-08-18 | 天津三合意电子有限公司 | Lithium ion power battery cap and welding method thereof |
| CN101814589A (en) * | 2010-05-06 | 2010-08-25 | 熊辉 | Explosion-proof cap of micro-resistance cylindrical lithium ion battery |
| CN203242679U (en) * | 2013-05-20 | 2013-10-16 | 泰兴市振兴电子有限公司 | Lithium-ion power type battery cover cap |
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2013
- 2013-05-20 CN CN201310184326XA patent/CN103296227A/en active Pending
Patent Citations (4)
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| CN201532972U (en) * | 2009-09-25 | 2010-07-21 | 天津佰特瑞电子有限公司 | Lithium ion power battery cover for preventing internal resistance from drifting |
| CN101807674A (en) * | 2010-04-13 | 2010-08-18 | 天津三合意电子有限公司 | Lithium ion power battery cap and welding method thereof |
| CN101814589A (en) * | 2010-05-06 | 2010-08-25 | 熊辉 | Explosion-proof cap of micro-resistance cylindrical lithium ion battery |
| CN203242679U (en) * | 2013-05-20 | 2013-10-16 | 泰兴市振兴电子有限公司 | Lithium-ion power type battery cover cap |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769780A (en) * | 2013-12-26 | 2014-05-07 | 合肥国轩高科动力能源股份公司 | Method for welding lithium ion battery stainless steel head cover and copper sheet |
| CN105428560A (en) * | 2015-12-30 | 2016-03-23 | 泰兴市振兴电子有限公司 | Power-type lithium battery low-resistance cover cap |
| CN105470418A (en) * | 2015-12-30 | 2016-04-06 | 泰兴市振兴电子有限公司 | Cylindrical lithium battery cap |
| CN108886122A (en) * | 2016-03-25 | 2018-11-23 | 三洋电机株式会社 | Cylindrical battery |
| US11069916B2 (en) | 2016-03-25 | 2021-07-20 | Sanyo Electric Co., Ltd. | Cylindrical battery |
| CN109807461A (en) * | 2019-03-20 | 2019-05-28 | 江阴海虹精密机械有限公司 | The Friction Stir Welding line and its welding procedure of complicated water runner water-cooled plate |
| CN109807461B (en) * | 2019-03-20 | 2021-07-09 | 江阴海虹精密机械有限公司 | Friction stir welding line of water-cooling plate with complex flow channel and welding process thereof |
| CN110253142A (en) * | 2019-07-03 | 2019-09-20 | 伊欧激光科技（苏州）有限公司 | The automatic assembling device of cylindrical lithium ion cell cap |
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Application publication date: 20130911 |