CN108340062A - A kind of bipolar ear welding method of lithium ion battery improving the solder bar service life - Google Patents
A kind of bipolar ear welding method of lithium ion battery improving the solder bar service life Download PDFInfo
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- CN108340062A CN108340062A CN201810088754.5A CN201810088754A CN108340062A CN 108340062 A CN108340062 A CN 108340062A CN 201810088754 A CN201810088754 A CN 201810088754A CN 108340062 A CN108340062 A CN 108340062A
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- Prior art keywords
- lug
- solder bar
- welding
- lithium ion
- ion battery
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- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 61
- 229910000679 solder Inorganic materials 0.000 title claims abstract description 50
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 14
- 239000010935 stainless steel Substances 0.000 claims abstract description 14
- 238000005452 bending Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 5
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 5
- 230000005405 multipole Effects 0.000 description 5
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 5
- 210000005069 ears Anatomy 0.000 description 4
- 239000011800 void material Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000368 destabilizing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
- B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/34—Preliminary treatment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention provides a kind of bipolar ear welding methods of lithium ion battery improving the solder bar service life, include the following steps：（1）Handle lug I, lug II：The depth for increasing intensive coining and coining on lug I is consistent, and lug II is not processed, and then places lug I, II metod for level press bending of lug, stacking；（2）Tab welding：By step（1）In lug I, the lug II handled well be positioned between solder bar and lower solder bar, place Stainless Steel Shell between the lug II and lower solder bar, then carry out spot welding precompressed, welding.It is an advantage of the invention that it is simple for process, it is easy to operate, in the case of ensureing welding quality, the service life of solder bar can be improved, and then improve production efficiency, reduce cost.
Description
Technical field
The present invention relates to technical field of lithium ion more particularly to a kind of lithium ion batteries improving the solder bar service life
Bipolar ear welding method.
Background technology
With the development of society, and demand of the people to high power capacity cylindrical lithium ion battery, inevitably cause
The lengthening of inside battery pole piece then increases internal resistance, increases heat production, and there are apparent security risks；Mostly use multipole at present
Ear structure designs to reduce the internal resistance of cell, especially in the majority with the design of Double-pole lug.However multi pole ears are welded to electrode knot together
It is problem on structure, rosin joint easily occurs, fall off or the excessively firm unbalanced phenomenon of the another layer tab welding of single layer lug rosin joint, influence to weld
Connect quality and battery performance.Situation is welded for adjustment, increasing welding parameter or changing welding manner becomes improvement direction,
In, increase welding parameter, the decaying in solder bar service life can be caused, increases cost, influence efficiency；Change welding manner, can increase
Other carrier, complex process easily cause the destabilizing factor that multiple welding, manufacturing cost are high, introducing is new.
Patent CN 202549967U《A kind of connection type of lithium-ion-power cell multi pole ears and cover board》, which will
Multiple lugs are respectively welded at the longer lug top of a length, solve the problems, such as multiple tab welding rosin joints, caducous,
But multiple welding is easily caused, complex process, efficiency is low, of high cost, is influenced, is difficult to control by the welding of multiple junior units.
Patent CN103500844A《Cylindrical multi-lug lithium ion battery and preparation method thereof》, the patent is by multiple lugs
When being welded on a boss, improve welding row yielding, but not considering to take into account the welding situation of multiple lugs simultaneously, need compared with
Big welding energy can cause the life time decay of solder bar and weld unbalanced situation.
Invention content
The object of the present invention is to provide a kind of bipolar ear welding method of lithium ion battery improving the solder bar service life, technique letters
It is single, it is easy to operate, in the case of ensureing welding quality, the service life of solder bar can be improved, and then improve production efficiency, reduce cost.
The technical solution adopted by the present invention is as follows：
A kind of bipolar ear welding method of lithium ion battery improving the solder bar service life, includes the following steps：
（1）Handle lug I, lug II：The depth for increasing intensive coining and coining on lug I is consistent, and lug II, which is not done, to be located
Reason then places lug I, II metod for level press bending of lug, stacking；
（2）Tab welding：By step（1）In lug I, the lug II handled well be positioned between solder bar and lower solder bar,
Stainless Steel Shell is placed between the lug II and lower solder bar, then carries out spot welding precompressed, welding.
Preferably, the step（1）In, the coining on lug I is intensive, and the center spacing each imprinted is 0.2-0.6mm,
Depth >=the 0.08-0.12mm each imprinted, wherein coining convex surface facing lug II.
Preferably, the step（2）In, the voltage of spot welding is 3.8-6.0V, and the pressure of electrode is：12-45N, when precompressed
Between be：10-40ms, weld interval be：3.5-6ms.
Preferably, the step（2）In, Stainless Steel Shell is an electrode of cylindrical lithium ion battery.
The advantage of the invention is that：
1, simple for process, in the case where not increasing other carriers, primary welding can be by multiple tab weldings on the electrode；
2, the welding energy required is low, in the case of ensureing welding quality, the service life of solder bar can be improved, and then improve production effect
Rate reduces cost；
3, density is imprinted by increasing lug, spot-welded reduces multi pole ears stacking welding energy, to improve solder bar
Service life, method is simple.
Description of the drawings
Fig. 1 is a kind of implementation process signal of bipolar ear welding method of lithium ion battery improving the solder bar service life of the present invention
Figure.
In figure：1, lug I, 2, lug II, 3, Stainless Steel Shell, 4, upper solder bar, 5, lower solder bar.
Specific implementation mode
The bipolar ear welding method of lithium ion battery for improving the solder bar service life a kind of to the present invention is made further detailed below
Description.
Embodiment 1
A kind of bipolar ear welding method of lithium ion battery improving the solder bar service life, includes the following steps：
（1）Handle lug I 1, lug II 2：The depth for increasing intensive coining and coining on lug I 1 is consistent, and lug II 2 is not
It processes, then places lug I 1, II 2 metod for level press bending of lug, stacking；
（2）Tab welding：By step（1）In lug I 1, the lug II 2 handled well be positioned over solder bar 4 and lower solder bar 5 it
Between, Stainless Steel Shell 3 is placed between the lug II 2 and lower solder bar 5, then carries out spot welding precompressed, welding.
Preferably, the step（1）In, the coining on lug I is intensive, and the center spacing each imprinted is 0.2-0.6mm,
Depth >=the 0.08-0.12mm each imprinted, wherein coining convex surface facing lug II.
Preferably, the step（2）In, the voltage of spot welding is 3.8-6.0V, and the pressure of electrode is：12-45N, when precompressed
Between be：10-40ms, weld interval be：3.5-6ms.
Preferably, the step（2）In, Stainless Steel Shell 3 is an electrode of cylindrical lithium ion battery.
Embodiment 2
（1）It chooses cylindrical lithium ion battery to be tested, Stainless Steel Shell 3 is as the negative electrode of cylindrical lithium ion battery, place
Manage lug I 1, lug II 2：The depth for increasing intensive coining and coining on lug I 1 is consistent, and lug II 2 is not processed, with
Lug I 1, II 2 metod for level press bending of lug, stacking are placed afterwards；Wherein, the center spacing each imprinted be 0.3mm, and imprint depth
Degree is 0.1mm；
（2）Tab welding：By step（1）In lug I 1, the lug II 2 handled well be positioned over solder bar 4 and lower solder bar 5 it
Between, Stainless Steel Shell 3 is placed between the lug II 2 and lower solder bar 5, then carries out spot welding precompressed, welding；
（3）Solder bar welding 500pcs, 1000pcs, 1500pcs are observed and recorded, when 2000pcs, 2500pcs, burn-through, void
Weld phenomenon and solder bar surface condition.
Such as table one：
Embodiment 3
（1）It chooses cylindrical lithium ion battery to be tested, Stainless Steel Shell 3 is as the negative electrode of cylindrical lithium ion battery, place
Manage lug I 1, lug II 2：The depth for increasing intensive coining and coining on lug I 1 is consistent, and lug II 2 is not processed, with
Lug I 1, II 2 metod for level press bending of lug, stacking are placed afterwards；Wherein, the center spacing each imprinted is 0.45mm, and imprint
Depth is 0.1mm；
（2）Tab welding：By step（1）In lug I 1, the lug II 2 handled well be positioned over solder bar 4 and lower solder bar 5 it
Between, Stainless Steel Shell 3 is placed between the lug II 2 and lower solder bar 5, then carries out spot welding precompressed, welding；
（3）Solder bar welding 500pcs, 1000pcs, 1500pcs are observed and recorded, when 2000pcs, 2500pcs, burn-through, void
Weld phenomenon and solder bar surface condition.
Such as table two：
Embodiment 4
（1）It chooses cylindrical lithium ion battery to be tested, Stainless Steel Shell 3 is as the negative electrode of cylindrical lithium ion battery, place
Manage lug I 1, lug II 2：The depth for increasing intensive coining and coining on lug I 1 is consistent, and lug II 2 is not processed, with
Lug I 1, II 2 metod for level press bending of lug, stacking are placed afterwards；Wherein, the center spacing each imprinted be 0.6mm, and imprint depth
Degree is 0.1mm；
（2）Tab welding：By step（1）In lug I 1, the lug II 2 handled well be positioned over solder bar 4 and lower solder bar 5 it
Between, Stainless Steel Shell 3 is placed between the lug II 2 and lower solder bar 5, then carries out spot welding precompressed, welding；
（3）Solder bar welding 500pcs, 1000pcs, 1500pcs are observed and recorded, when 2000pcs, 2500pcs, burn-through, void
Weld phenomenon and solder bar surface condition.
Such as table three：
Interpretation of result：In experiment, the center spacing of the coining of embodiment 2 is 0.3mm, and the center spacing of the coining of embodiment 3 is
The center spacing of 0.45mm, the coining of embodiment 4 are 0.6mm, in conjunction with table one, table two, table three it can be seen that ensureing depth one
Under the conditions of cause, increase coining closeness, when lug 2 is not processed, the big solder bar of coining closeness lasts a long time, and without appearance
Easily there is rosin joint and fall off, welding energy is turned up, declines in rosin joint, burn-through bad phenomenon, effective solution multi pole ears stacking welding
Subtract the solder bar service life, the problem for causing weldering disconnected improves production qualification rate and efficiency, obtained in addition combined with table one, table two, table three
The coining closeness that center spacing is 0.3mm is preferred coining closeness.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc. made by within refreshing and principle should all include within protection scope of the present invention.
Claims (4)
1. a kind of bipolar ear welding method of lithium ion battery improving the solder bar service life, it is characterised in that：Include the following steps：
Handle lug I, lug II：The depth for increasing intensive coining and coining on lug I is consistent, and lug II is not processed,
Then lug I, II metod for level press bending of lug, stacking are placed；
Tab welding：By step（1）In lug I, the lug II handled well be positioned between solder bar and lower solder bar, it is described
Stainless Steel Shell is placed between lug II and lower solder bar, then carries out spot welding precompressed, welding.
2. a kind of bipolar ear welding method of lithium ion battery improving the solder bar service life according to claim 1, feature
It is：The step（1）In, the coining on lug I is intensive, and the center spacing each imprinted is 0.2-0.6mm, is each imprinted
Depth >=0.08-0.12mm, wherein coining convex surface facing lug II.
3. a kind of bipolar ear welding method of lithium ion battery improving the solder bar service life according to claim 1, feature
It is：The step（2）In, the voltage of spot welding is 3.8-6.0V, and the pressure of electrode is：12-45N, squeeze time are：10-
40ms, weld interval be：3.5-6ms.
4. a kind of bipolar ear welding method of lithium ion battery improving the solder bar service life according to claim 1, feature
It is：The step（2）In, Stainless Steel Shell is an electrode of cylindrical lithium ion battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810088754.5A CN108340062A (en) | 2018-01-30 | 2018-01-30 | A kind of bipolar ear welding method of lithium ion battery improving the solder bar service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810088754.5A CN108340062A (en) | 2018-01-30 | 2018-01-30 | A kind of bipolar ear welding method of lithium ion battery improving the solder bar service life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108340062A true CN108340062A (en) | 2018-07-31 |
Family
ID=62961509
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810088754.5A Pending CN108340062A (en) | 2018-01-30 | 2018-01-30 | A kind of bipolar ear welding method of lithium ion battery improving the solder bar service life |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366359A (en) * | 2001-01-17 | 2002-08-28 | 日本电气移动能株式会社 | Joint structure of battery conductive contact |
| JP2002260628A (en) * | 2001-03-06 | 2002-09-13 | Toshiba Battery Co Ltd | Positive electrode for alkaline secondary battery, manufacturing method of positive electrode for the alkaline secondary battery, and the alkaline secondary battery |
| JP2007273258A (en) * | 2006-03-31 | 2007-10-18 | Sanyo Electric Co Ltd | Battery |
| CN201369367Y (en) * | 2009-02-26 | 2009-12-23 | 宁波伊司达锂电池有限公司 | Power lithium battery bare cell with double-tab structure |
| CN201498546U (en) * | 2009-03-19 | 2010-06-02 | 江海洋 | Structure used for welding pole piece and pole lug by planar welding column and used for rechargeable battery |
| CN102290554A (en) * | 2011-08-01 | 2011-12-21 | 曙鹏科技（深圳）有限公司 | Negative lug and battery |
| WO2012147425A1 (en) * | 2011-04-28 | 2012-11-01 | 日立マクセルエナジー株式会社 | Cylindrical lithium ion secondary battery and manufacturing method therefor |
| CN103531741A (en) * | 2013-09-24 | 2014-01-22 | 北京鼎能开源电池科技股份有限公司 | Lithium ion battery negative electrode tab component, manufacturing method thereof and lithium ion battery |
| CN107170948A (en) * | 2017-02-21 | 2017-09-15 | 深圳市比克动力电池有限公司 | A kind of Double-pole lug cylindrical lithium ion battery and preparation method thereof |
-
2018
- 2018-01-30 CN CN201810088754.5A patent/CN108340062A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366359A (en) * | 2001-01-17 | 2002-08-28 | 日本电气移动能株式会社 | Joint structure of battery conductive contact |
| JP2002260628A (en) * | 2001-03-06 | 2002-09-13 | Toshiba Battery Co Ltd | Positive electrode for alkaline secondary battery, manufacturing method of positive electrode for the alkaline secondary battery, and the alkaline secondary battery |
| JP2007273258A (en) * | 2006-03-31 | 2007-10-18 | Sanyo Electric Co Ltd | Battery |
| CN201369367Y (en) * | 2009-02-26 | 2009-12-23 | 宁波伊司达锂电池有限公司 | Power lithium battery bare cell with double-tab structure |
| CN201498546U (en) * | 2009-03-19 | 2010-06-02 | 江海洋 | Structure used for welding pole piece and pole lug by planar welding column and used for rechargeable battery |
| WO2012147425A1 (en) * | 2011-04-28 | 2012-11-01 | 日立マクセルエナジー株式会社 | Cylindrical lithium ion secondary battery and manufacturing method therefor |
| CN102290554A (en) * | 2011-08-01 | 2011-12-21 | 曙鹏科技（深圳）有限公司 | Negative lug and battery |
| CN103531741A (en) * | 2013-09-24 | 2014-01-22 | 北京鼎能开源电池科技股份有限公司 | Lithium ion battery negative electrode tab component, manufacturing method thereof and lithium ion battery |
| CN107170948A (en) * | 2017-02-21 | 2017-09-15 | 深圳市比克动力电池有限公司 | A kind of Double-pole lug cylindrical lithium ion battery and preparation method thereof |
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Application publication date: 20180731 |