CN102513670A - Method for lowering cathode rosin joint rate of lithium ion battery - Google Patents
Method for lowering cathode rosin joint rate of lithium ion battery Download PDFInfo
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- CN102513670A CN102513670A CN2011103660438A CN201110366043A CN102513670A CN 102513670 A CN102513670 A CN 102513670A CN 2011103660438 A CN2011103660438 A CN 2011103660438A CN 201110366043 A CN201110366043 A CN 201110366043A CN 102513670 A CN102513670 A CN 102513670A
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- lug
- electric core
- cathode
- lithium ion
- cover plate
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Abstract
The invention discloses a method for lowering the cathode rosin joint rate of a lithium ion battery. The method comprises the following steps of: trimming lugs of the anode and cathode of a three-in-one electric core of the lithium ion battery till the lengths of the lugs are 12-15 millimeters when measured from a non-bending position; inserting a cover plate lug of the lithium ion battery between two cathode lugs of the three-in-one electric core, and aligning; clamping the cover plate lug and the lugs of the three-in-one electric core with a clamp, and performing resistance welding on the cover plate lug and the cathode lugs of the three-in-one electric core between two hollowed positions, wherein the clamp comprises an upper splint and a lower splint, oblong-shaped hollowed positions are formed in the middles of the upper and lower splints, and a through hole is formed between the two hollowed positions; welding eight welding spots between the cathode lug of the cover plate and the cathode lug of the three-in-one electric core; and measuring whether the lengths of the anode and cathode lugs of the three-in-one electric core are 13 millimeters when measured from a non-bending position. Due to the adoption of the method, the rosin joint rate of the cathode of the electric core is lowered, the result of increase in the internal resistance of the battery caused by rosin joint is avoided, and the welding tightness between each cathode lug and the cover plate lug is ensured simultaneously.
Description
Technical field
The present invention relates to battery and make the field, specifically is a kind of method that reduces lithium ion battery negative rosin joint rate.
Background technology
One big technical problem of lithium-ion-power cell development is exactly cell cathode ear pole and cover plate Welding Problems.A main link is exactly to adopt electric resistance welding that the negative lug of electric core and the negative lug of cover plate are welded together in the lithium-ion-power cell production process; When welding, lean on the staff location between the cover plate negative lug of present lithium ion and the electric core negative lug fully; The phenomenon that cover plate negative lug and electric core negative lug occur not lining up easily when welding causes rosin joint, solder joint is not enough and weldering is inclined to one side, causes the internal resistance of cell to increase.
Summary of the invention
The purpose of this invention is to provide a kind of method that reduces lithium ion battery negative rosin joint rate, overcome in when welding because cause rosin joint during the phenomenon that not lining up appears in cover plate negative lug and electric core negative lug, solder joint is not enough and weld inclined to one side problem.
Technical scheme of the present invention is following:
A kind of method that reduces lithium ion battery negative rosin joint rate is characterized in that: include following steps:
(1), three and the positive and negative electrode lug of electric core of lithium ion battery are pruned, make the length of lug never be measured as 12 mm to 15mm in the crook.
(2), with the cover plate lug of lithium ion battery insert three and two negative lug of electric core between and alignment;
(3), with clamp clamps cover plate lug and three and two negative lug of electric core; Anchor clamps include lower plate; Respectively have between square hollow out place of a director and the two hollow out places in the middle of the last lower plate to be provided with through hole, to the cover plate lug between the two hollow out places with three also the negative lug of electric core carry out electric resistance welding.
The negative lug of cover plate and three and the negative lug of electric core between be welded with eight solder joints.
Three and the length of the positive and negative electrode lug of electric core never be measured as 13mm in the crook.
Through to the three also prunings of electric core both positive and negative polarity lug length, appear at lug than position intermediate with eight solder joints that guarantee the negative pole electric resistance welding; With the cover plate lug of lithium ion battery insert three and two negative lug of electric core between guaranteed welding firmly; Adopt clamp clamps negative lug and cover plate lug to weld the rosin joint rate that reduces electric core negative pole.
Beneficial effect of the present invention:
The present invention has reduced the rosin joint rate of electric core negative pole, has avoided because the result that the internal resistance of cell that rosin joint causes increases has guaranteed the fastness of welding between negative lug and the cover plate lug simultaneously.
Description of drawings
Fig. 1 is the side view of the present invention three and electric core and cover plate.
Fig. 2 is the side view of anchor clamps of the present invention.
Fig. 3 is the vertical view of anchor clamps of the present invention.
The specific embodiment
A kind of method that reduces lithium ion battery negative rosin joint rate includes following steps:
(1), three and the positive and negative electrode lug of electric core of lithium ion battery are pruned, make the length of lug never be measured as 13mm in the crook;
(2), with the cover plate lug of lithium ion battery 1 insert three and first lug 2 of the negative pole of electric core and second lug 3 between and alignment;
(3), with clamp clamps cover plate lug 1 and three and the negative lug of electric core; Anchor clamps include lower plate 4,5; Respectively there are square hollow out place 6 of a director and two hollow out places to be provided with through hole 7 in the middle of the last lower plate 4,5; To the cover plate lug 1 between the two hollow out places 6 and three and the negative lug of electric core carry out electric resistance welding, be welded with eight solder joints.
Claims (3)
1. method that reduces lithium ion battery negative rosin joint rate is characterized in that: include following steps:
(1), three and the positive and negative electrode lug of electric core of lithium ion battery are pruned, make the length of lug never be measured as 12 mm to 15mm in the crook;
(2), with the cover plate lug of lithium ion battery insert three and two negative lug of electric core between and alignment;
(3), with clamp clamps cover plate lug and three and two negative lug of electric core; Anchor clamps include lower plate; Respectively have between square hollow out place of a director and the two hollow out places in the middle of the last lower plate to be provided with through hole, to the cover plate lug between the two hollow out places with three also the negative lug of electric core carry out electric resistance welding.
2. a kind of method that reduces lithium ion battery negative rosin joint rate as claimed in claim 1 is characterized in that: the negative lug of cover plate and three and the negative lug of electric core between be welded with eight solder joints.
3. a kind of method that reduces lithium ion battery negative rosin joint rate as claimed in claim 1 is characterized in that: three and the length of the positive and negative electrode lug of electric core never be measured as 13mm in the crook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103660438A CN102513670A (en) | 2011-11-18 | 2011-11-18 | Method for lowering cathode rosin joint rate of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103660438A CN102513670A (en) | 2011-11-18 | 2011-11-18 | Method for lowering cathode rosin joint rate of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102513670A true CN102513670A (en) | 2012-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103660438A Pending CN102513670A (en) | 2011-11-18 | 2011-11-18 | Method for lowering cathode rosin joint rate of lithium ion battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN102513670A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728068A (en) * | 2017-09-24 | 2018-02-23 | 合肥国轩高科动力能源有限公司 | A kind of short-circuit resistance method of testing |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10146679A (en) * | 1996-11-13 | 1998-06-02 | Denso Corp | Electric resistance welding method for different kinds of materials |
| CN1730228A (en) * | 2005-08-22 | 2006-02-08 | 天津力神电池股份有限公司 | Method for improving welding strength of lithium ion rectangular cell negative electrode lug |
| CN2814679Y (en) * | 2005-06-24 | 2006-09-06 | 深圳市比克电池有限公司 | Positioning device especially used for welding lithium ion battery electrode ear |
| JP2007184184A (en) * | 2006-01-10 | 2007-07-19 | Sanoh Industrial Co Ltd | Method for welding connection plate in battery pack |
| CN201146208Y (en) * | 2007-12-31 | 2008-11-05 | 比亚迪股份有限公司 | Clamp for welding pole piece and pole ear of lithium ion battery |
| CN201249341Y (en) * | 2008-08-19 | 2009-06-03 | 天津力神电池股份有限公司 | Electrode clip for welding tabs of lithium ion battery |
| CN101685886A (en) * | 2008-09-28 | 2010-03-31 | 江苏双登电源有限公司 | Assembling method of flexible packing lithium ion battery |
| CN201997846U (en) * | 2011-03-07 | 2011-10-05 | 重庆永通信息工程实业有限公司 | Positioning clamp for spot welding of pole tab of lithium ion battery |
-
2011
- 2011-11-18 CN CN2011103660438A patent/CN102513670A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10146679A (en) * | 1996-11-13 | 1998-06-02 | Denso Corp | Electric resistance welding method for different kinds of materials |
| CN2814679Y (en) * | 2005-06-24 | 2006-09-06 | 深圳市比克电池有限公司 | Positioning device especially used for welding lithium ion battery electrode ear |
| CN1730228A (en) * | 2005-08-22 | 2006-02-08 | 天津力神电池股份有限公司 | Method for improving welding strength of lithium ion rectangular cell negative electrode lug |
| JP2007184184A (en) * | 2006-01-10 | 2007-07-19 | Sanoh Industrial Co Ltd | Method for welding connection plate in battery pack |
| CN201146208Y (en) * | 2007-12-31 | 2008-11-05 | 比亚迪股份有限公司 | Clamp for welding pole piece and pole ear of lithium ion battery |
| CN201249341Y (en) * | 2008-08-19 | 2009-06-03 | 天津力神电池股份有限公司 | Electrode clip for welding tabs of lithium ion battery |
| CN101685886A (en) * | 2008-09-28 | 2010-03-31 | 江苏双登电源有限公司 | Assembling method of flexible packing lithium ion battery |
| CN201997846U (en) * | 2011-03-07 | 2011-10-05 | 重庆永通信息工程实业有限公司 | Positioning clamp for spot welding of pole tab of lithium ion battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728068A (en) * | 2017-09-24 | 2018-02-23 | 合肥国轩高科动力能源有限公司 | A kind of short-circuit resistance method of testing |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 230000 Yaohai Industrial Park, Anhui, Hefei No. D weft Road, No. 7 Applicant after: Hefei Guoxuan High-Tech Power Energy Co., Ltd. Address before: 230000 Yaohai Industrial Park, Anhui, Hefei No. D weft Road, No. 7 Applicant before: Hefei Guoxuan High-Tech Power Energy Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: HEFEI GUOXUAN HIGH-TECH POWER ENERGY CO., LTD. TO: HEFEI GUOXUAN HIGH-TECH POWER ENERGY CO., LTD. |
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Application publication date: 20120627 |