CN103042313A - Welding method of current collators for high-capacity lithium ion power batteries - Google Patents
Welding method of current collators for high-capacity lithium ion power batteries Download PDFInfo
- Publication number
- CN103042313A CN103042313A CN2012105737617A CN201210573761A CN103042313A CN 103042313 A CN103042313 A CN 103042313A CN 2012105737617 A CN2012105737617 A CN 2012105737617A CN 201210573761 A CN201210573761 A CN 201210573761A CN 103042313 A CN103042313 A CN 103042313A
- Authority
- CN
- China
- Prior art keywords
- welding
- ultrasonic bond
- lithium ion
- capacity lithium
- ion power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the technical field of manufacture of lithium ion batteries, in particular to a welding method of current collators for high-capacity lithium ion power batteries. The method includes the steps of firstly, performing ultrasonic welding to a current collector part; and secondly, performing additional laser welding to non-ultrasonic-welding spot areas on a surface textured by ultrasonic welding. The two welding techniques are applied perfectly, welding strength and contact area of connections of the current collector for high-capacity lithium ion power batteries are increased, advantages of the two welding techniques are integrated, and the defects caused by single ultrasonic welding or single laser welding are made up or eliminated. The two welding techniques are harmonically unitized for production of the high-capacity power batteries, various safety problems such as poor quality and subsequent using problems caused by poor quality in traditional single ultrasonic welding or laser welding are avoided, and reject ratio, scrappage and safety hazards are decreased.
Description
Technical field
The present invention relates to the manufacturing technology field of lithium ion battery, relate in particular to a kind of high-capacity lithium-ion power battery collector welding method.
Background technology
Along with the energy crisis in the global range and problem of environmental pollution are day by day serious, seek Green Sustainable new forms of energy oneself become the main development direction of energy field.Electric automobile is developed rapidly as a kind of new forms of energy vehicles of energy-conserving and environment-protective, lithium ion battery because of have the energy density height, have extended cycle life, the advantage such as green non-pollution, make it become one of electrical source of power that gets most of the attention.The welding sequence of collector parts has become the most important thing of battery assembling process, failure welding produces various quality problems easily herein, in the situation such as vibration, extruding, suddenly temperature rise, electric current be excessive, the problems such as sealing-off, internal short-circuit, spontaneous combustion appear, battery has and catches fire even explosion danger, brings potential safety hazard to the user.Therefore the stability and the security that improve the reason ion battery are the main directions of electrokinetic cell research always.
At present, the general using ultrasound solder technology of the assembling of high-capacity lithium-ion power battery collector parts in the industry, that the ultrasonic bond welding has is low to the solder side surface requirements, bonding area large, without plurality of advantages such as heat affected area, the low pollutions of environmental protection.But the ultrasonic bond weld strength is subjected to the factor affecting such as the wearing and tearing of thickness of workpiece, welding machine and the non-linear reduction of power output, quality control check difficulty are complicated, is difficult to fully up to expectations at the welding effect of high capacity cell collector always.
Industry small part manufacturing enterprise collector parts use laser weld, laser weld has the weld strength height, is not subject to environmental disturbances, to the advantage such as workpiece is contactless, but, simple high capacity cell collector Laser Welding welding shortcoming is also comparatively outstanding, shows as that single-point energy is higher to cause that welding efficiency is lower, the less overcurrent poor-performing etc. that causes of bonding area.
In summary it can be seen, after the collector parts carry out the welding of simple ultrasonic bond or simple Laser Welding welding, all there is some specific defects, the Integrated using performances such as overcurrent performance, high rate performance, stretching resistance performance are difficult to take into account, and are difficult to reach get large electric current, the contour performance requirement of low-temperature-rise in the actual use of large capacity battery core.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned technology, and a kind of high-capacity lithium-ion power battery collector welding method be provided, satisfy technological requirement, reduce to produce bad in, reduced the potential safety hazard of in the future using.
The present invention for achieving the above object, by the following technical solutions:
A kind of high-capacity lithium-ion power battery collector welding method is characterized in that: may further comprise the steps:
Step 1 is carried out the ultrasonic bond welding at the collector parts first;
Step 2, the Laser Welding welding that adds in the non-ultrasonic bond spot area of textured surface of ultrasonic bond welding again.
Described ultrasonic bond stand-off height is more than or equal to the spot diameter of Laser Welding welding.
The spot pitch of described ultrasonic bond is more than or equal to 0.8mm.
The invention has the beneficial effects as follows: the present invention can perfectly use two kinds of solder technology, increase weld strength and the contact area of high-capacity lithium-ion power battery collector connecting portion, integrate the advantage of two kinds of welding, and remedy and eliminate the defective that single ultrasonic bond or single Laser Welding welding manner cause.Make two kinds of welding manners carry out harmony in great-capacity power battery production, avoid because the various quality that in the past single ultrasonic bond welding or Laser Welding failure welding cause are bad and the safety problem of follow-up use.Reduce bad, scrap and potential safety hazard.
Take the bonding area of 25 millimeters of 8 millimeters * of great-capacity power battery collector as example:
1. after the collector parts carried out the composite welding of ultrasonic bond and Laser Welding, weld strength was higher, and vertically the stretching resistance test reaches more than 500 newton, and laterally resistance to tension reaches more than 800 newton;
2. after the collector parts carried out the composite welding of ultrasonic bond and Laser Welding, the connector contact area increased, and conventional charging and discharging currents can reach 500A, and instantaneous charging and discharging currents can reach 1000A;
3. after the collector parts carried out the composite welding of ultrasonic bond and Laser Welding, area of passage increased, and 10C discharges and recharges the battery average temperature rising and can be controlled in 50 degrees centigrade.
The specific embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with preferred embodiment, a kind of high-capacity lithium-ion power battery collector welding method may further comprise the steps:
Step 1 is carried out the ultrasonic bond welding at the collector parts first; The power battery current collector parts are positioned on the specific frock of ultrasonic bond welding bench fixingly, ultrasonic bond bonding machine parameter is in the process parameter control scope, and the soldering tip of control ultrasonic bond bonding machine presses down the ultrasonic bond welding of finishing the collector parts.
Step 2, the Laser Welding welding that adds in the non-ultrasonic bond spot area of textured surface of ultrasonic bond welding again.The collector parts of finishing the ultrasonic bond welding are fixed on the Laser Welding welding bench, confirm that (zone has specificity at the Laser Welding welding region in a Laser Welding outgoing position, need and be necessary for non-ultrasonic bond spot area), the control Laser Welding is finished laser weld.At this moment, the ultrasonic bond of the whole collector parts composite welding that adds Laser Welding is finished.
Laser energy can change with focal length variations when welding because of Laser Welding, described ultrasonic bond stand-off height affects the focal length that follow-up Laser Welding welding produces to reduce the solder joint convex-concave deformation that causes at surface of the work after the excusing from death welding more than or equal to the spot diameter of Laser Welding welding.Preferably, the spot pitch of described ultrasonic bond is more than or equal to 0.8mm, can be on the same level face to satisfy follow-up Laser Welding welding focus, guarantee that Laser Welding welds the uniformity of each Frequency point laser energy.
When continuous production or mass production, can a certain collector parts be that benchmark is installed positioning tool, reaching the accurate location of ultrasonic bond between the collector parts, and then the accurate location of bond pad locations during the improving laser weldering, reduce producers' labour intensity, improving production efficiency.
The present invention can perfectly use two kinds of solder technology, increase weld strength and the contact area of high-capacity lithium-ion power battery collector connecting portion, integrate the advantage of two kinds of welding, and remedy and eliminate the defective that single ultrasonic bond or single Laser Welding welding manner cause.Make two kinds of welding manners carry out harmony in great-capacity power battery production, avoid because the various quality that in the past single ultrasonic bond welding or Laser Welding failure welding cause are bad and the safety problem of follow-up use.Reduce bad, scrap and potential safety hazard.
Take the bonding area of 25 millimeters of 8 millimeters * in great-capacity power battery collector place as example:
| Solder joint | Single solder joint area | The solder joint number | The effective contact area of overcurrent | |
| Ultrasonic bond | 1.5 1.5 millimeters of millimeter * | 2.25 square millimeter | 40 | 2.25*40=90 square millimeter |
| Laser Welding | 1.2 millimeters of diameter phi | 1.13 square millimeter | 40 | 1.13*40=45.2 square millimeter |
After the collector position was added with Laser Welding, effective contact area can increase over half, can promote greatly overcurrent, the high rate performance of battery.
1. after the collector parts carried out the composite welding of ultrasonic bond and Laser Welding, weld strength was higher, and vertically the stretching resistance test reaches more than 500 newton, and laterally resistance to tension reaches more than 800 newton;
2. after the collector parts carried out the composite welding of ultrasonic bond and Laser Welding, the connector contact area increased, and conventional charging and discharging currents can reach 500A, and instantaneous charging and discharging currents can reach 1000A;
3. after the collector parts carried out the composite welding of ultrasonic bond and Laser Welding, area of passage increased, and 10C discharges and recharges the battery average temperature rising and can be controlled in 50 degrees centigrade.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. high-capacity lithium-ion power battery collector welding method is characterized in that: may further comprise the steps:
Step 1 is carried out the ultrasonic bond welding at the collector parts first;
Step 2, the Laser Welding welding that adds in the non-ultrasonic bond spot area of textured surface of ultrasonic bond welding again.
2. high-capacity lithium-ion power battery collector welding method according to claim 1 is characterized in that: the spot diameter that described ultrasonic bond stand-off height is welded more than or equal to Laser Welding.
3. high-capacity lithium-ion power battery collector welding method according to claim 2, it is characterized in that: the spot pitch of described ultrasonic bond is more than or equal to 0.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210573761.7A CN103042313B (en) | 2012-12-26 | 2012-12-26 | High-capacity lithium-ion power battery collector welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210573761.7A CN103042313B (en) | 2012-12-26 | 2012-12-26 | High-capacity lithium-ion power battery collector welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103042313A true CN103042313A (en) | 2013-04-17 |
| CN103042313B CN103042313B (en) | 2015-09-23 |
Family
ID=48055298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210573761.7A Expired - Fee Related CN103042313B (en) | 2012-12-26 | 2012-12-26 | High-capacity lithium-ion power battery collector welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103042313B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015136731A (en) * | 2014-01-24 | 2015-07-30 | 日本アビオニクス株式会社 | welding equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100469293B1 (en) * | 2001-12-21 | 2005-02-02 | 재단법인 포항산업과학연구원 | Welding metnod utilizing combination of ultrasonic and laser power |
| CN101364644A (en) * | 2007-08-10 | 2009-02-11 | 深圳市比克电池有限公司 | Lithium battery current collecting body, high capacity cylindrical lithium ionic cell and preparation |
| CN102306777A (en) * | 2011-08-30 | 2012-01-04 | 广州市云通磁电有限公司 | Positive electrode sheet of lithium iron phosphate type lithium ion battery, and preparation method thereof |
| KR20120039216A (en) * | 2010-10-15 | 2012-04-25 | 한국과학기술원 | Laser processing method and apparatus using ultrasonic wave |
| CN102447093A (en) * | 2011-12-23 | 2012-05-09 | 天津力神电池股份有限公司 | Lithium ion battery |
| CN102800870A (en) * | 2012-08-29 | 2012-11-28 | 浙江谷神能源科技股份有限公司 | Cylindrical power lithium-ion battery and preparation method |
| CN202585660U (en) * | 2012-02-20 | 2012-12-05 | 宁德新能源科技有限公司 | Power battery with winding structure |
-
2012
- 2012-12-26 CN CN201210573761.7A patent/CN103042313B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100469293B1 (en) * | 2001-12-21 | 2005-02-02 | 재단법인 포항산업과학연구원 | Welding metnod utilizing combination of ultrasonic and laser power |
| CN101364644A (en) * | 2007-08-10 | 2009-02-11 | 深圳市比克电池有限公司 | Lithium battery current collecting body, high capacity cylindrical lithium ionic cell and preparation |
| KR20120039216A (en) * | 2010-10-15 | 2012-04-25 | 한국과학기술원 | Laser processing method and apparatus using ultrasonic wave |
| CN102306777A (en) * | 2011-08-30 | 2012-01-04 | 广州市云通磁电有限公司 | Positive electrode sheet of lithium iron phosphate type lithium ion battery, and preparation method thereof |
| CN102447093A (en) * | 2011-12-23 | 2012-05-09 | 天津力神电池股份有限公司 | Lithium ion battery |
| CN202585660U (en) * | 2012-02-20 | 2012-12-05 | 宁德新能源科技有限公司 | Power battery with winding structure |
| CN102800870A (en) * | 2012-08-29 | 2012-11-28 | 浙江谷神能源科技股份有限公司 | Cylindrical power lithium-ion battery and preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015136731A (en) * | 2014-01-24 | 2015-07-30 | 日本アビオニクス株式会社 | welding equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103042313B (en) | 2015-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110948111B (en) | Composite welding method for tab of soft package lithium ion battery | |
| CN107234329B (en) | Method for welding tab of soft-packaged battery cell | |
| KR20120076020A (en) | Battery module and tab ultrasonic wave welding method | |
| US20120226373A1 (en) | Multi-mode ultrasonic welding control and optimization | |
| CN205542998U (en) | High power wet process cellulose non -woven fabrics diaphragm paper structure aluminum hull lithium ion secondary cell | |
| CN104117776A (en) | Laser welding method for high-reflection metal parts | |
| CN204966575U (en) | Lithium cell edge weld utmost point ear piece that converges | |
| CN203003335U (en) | Foil pole lug lithium ion battery pole lug prewelding head | |
| CN104409768B (en) | Lithium battery | |
| CN203466249U (en) | Electrode plate structure and battery module | |
| CN105810875B (en) | Round current collecting plates for lithium ion battery | |
| CN103042313B (en) | High-capacity lithium-ion power battery collector welding method | |
| CN207386806U (en) | A kind of Laser Welding connection structure of battery pole ear | |
| CN110571400A (en) | power battery module bus bar and welding method thereof | |
| CN106271079A (en) | A kind of dual wavelength complex welding method in battery liquid-filling hole | |
| CN209936227U (en) | Full utmost point ear battery ultrasonic welding is with anchor clamps | |
| CN215065705U (en) | Structure for testing welding strength of first lithium battery part | |
| CN204029921U (en) | A kind of secondary cell current-collecting device | |
| CN207690904U (en) | A kind of improved soft package battery module | |
| CN207690897U (en) | A kind of improved battery busbar structure | |
| CN210092145U (en) | Wire-bonding combined cap for lithium battery | |
| KR101297398B1 (en) | Battery Cell and Welding Method for Welding electrode lead of Battery Cell | |
| Yang et al. | Exploration on Automatic Welding Methods for Battery Pack of New Energy Automobiles | |
| CN205985165U (en) | Connection structure of power battery cell assembly | |
| CN219286609U (en) | Strip-shaped tab welding sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20151226 |
|
| EXPY | Termination of patent right or utility model |