CN103464851A - Series-parallel connection precise thermocompression bonding process for soft-packing cell lug of lithium battery pack - Google Patents
Series-parallel connection precise thermocompression bonding process for soft-packing cell lug of lithium battery pack Download PDFInfo
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- CN103464851A CN103464851A CN2012102021944A CN201210202194A CN103464851A CN 103464851 A CN103464851 A CN 103464851A CN 2012102021944 A CN2012102021944 A CN 2012102021944A CN 201210202194 A CN201210202194 A CN 201210202194A CN 103464851 A CN103464851 A CN 103464851A
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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
The invention discloses a series-parallel connection precise thermocompression bonding process for a soft-packing cell lug of a lithium battery pack. The process comprises the steps of shaping and bending the lug ends of the soft-packing cells to be in proper connecting states, performing virtualization series-parallel connection between the bending part of each soft-packing cell and a tin plate, and then performing point-oriented pressurizing on a virtualized series-parallel connection region through a precise hot pressure welding machine and instantly heating the virtualized series-parallel connection region at high temperature, and finally cooling and solidifying the virtualized series-parallel connection region through cooling gas. By adopting the once soldering forming process, the series-parallel connection precise thermocompression bonding process can be simplified to be operated, the lugs can not be burnt out, contact resistors serially connected with the lugs can be reduced, and the reliability of lug connection can be improved.
Description
Technical field:
The invention belongs to the power battery technology field, particularly relate to a kind of soft pack cell connection in series-parallel precision hot pressing welding procedure of lithium battery group.
Background technology:
Current high-energy, high power type lithium battery group are a kind of power battery pack that the connection in series-parallel by lug forms by a plurality of monomer soft pack cells, and the lug connection in series-parallel of each monomer soft pack cell mainly contains two kinds of modes at present: the one, adopt repeatedly laser weld or ultrasonic bonding mode, be to weld once between every two lugs, during welding along the perimeter line spot welding of lug, when a plurality of lug connection in series-parallel is arranged, need multiple welding; Maybe need to be connected by confluence copper bar, complex process so not only, operate loaded down with trivial detailsly, and is easy to burn out lug, affects the soft pack cell performance; The 2nd, adopt mechanical crimping mode, being about to need series-parallel a plurality of lug to intersect is superimposed, then by a compressing piece, be fixed, though this mode is relatively convenient, but on the one hand can be because out-of-flatness and the microcosmic air gap of two contact-making surfaces, increase the series-parallel contact resistance of lug, affect the efficiency for charge-discharge of soft pack cell, the reliability of crimping is poor on the other hand, crimping is processed bad can the existence and is vibrated rear loosening hidden danger, and the compressing piece distortion also can affect compacting, and causes heavy-current discharge, produce amount of heat damage soft pack cell.
Summary of the invention:
Goal of the invention of the present invention is to overcome the deficiency of above-mentioned prior art, a kind of soft pack cell lug connection in series-parallel precision hot pressing welding procedure of lithium battery group is provided, and it is simplified operation both, does not burn out lug, can reduce again the series-parallel contact resistance of lug, and improve the reliability that lug connects.
For achieving the above object, the present invention has adopted following technical scheme:
A kind of soft pack cell lug connection in series-parallel precision hot pressing welding procedure of lithium battery group, first the lug end shaping bending of each soft pack cell extremely is applicable to connection status, again by the bending part of each soft pack cell lug and the virtual connection in series-parallel of tin sheet, then with the precision hot pressing welding machine, this virtual connection in series-parallel zone is looked for and a little exerted pressure and carry out the moment high-temperature heating, finally with refrigerating gas, cooling curing is carried out in this virtual connection in series-parallel zone.
Described virtual connection in series-parallel refers to the bending part of each soft pack cell lug is intersected and is superimposed, and the tin sheet is placed in to the upper surface of the cross facet of each bending part.
The cross facet length of the bending part of described each soft pack cell lug is 5mm～10mm.
The initiating terminal of the bending part of described each soft pack cell lug is reserved with certain circular arc degree.
Be 2～5 seconds the heat time heating time of high-temperature heating described moment, and the heat applied should guarantee that on lug root and soft pack cell, the sealing part temperature is no more than 100 ℃ within the unit interval.
The present invention has following advantage with respect to prior art:
At first, a soldering moulding of the soft pack cell lug that the present invention is superimposed to intersection by the precision hot pressing welding machine, thereby greatly simplified technique, and facilitated operation, also can avoid lug to be burned simultaneously, guaranteed the soft pack cell performance.Secondly, the present invention realizes the connection in series-parallel of soft pack cell lug by soldering, can effectively reduce the series-parallel contact resistance of lug, improves the efficiency for charge-discharge of soft pack cell, and also can increase the reliability connected between each lug, avoid occurring the many undesirable elements that bring because of loosening.
The accompanying drawing explanation:
Fig. 1 is the series-parallel schematic diagram of soft pack cell lug of the present invention.
The specific embodiment:
Referring to Fig. 1, as a kind of embodiment of the present invention, the soft pack cell connection in series-parallel precision hot pressing welding procedure of this lithium battery group comprises: first the 1 end shaping bending of the lug of each soft pack cell extremely is applicable to connection status, again by the bending part of each soft pack cell lug 1 11 and the virtual connection in series-parallel of tin sheet 2, then with the precision hot pressing welding machine, this virtual connection in series-parallel zone 3 is looked for and a little exerted pressure and carry out the moment high-temperature heating, be 2～5 seconds the heat time heating time of high-temperature heating moment, the heat applied should guarantee that on lug root and soft pack cell, sealing part temperature (being in each time of moment high-temperature heating) within the unit interval is no more than 100 ℃, finally with refrigerating gas, cooling curing is carried out in this virtual connection in series-parallel zone 3.Evenly full after 2 fusings of tin sheet, lug and the compacting of lug interlayer, thickness≤0.05mm, tearing strength >=50N.
Virtual connection in series-parallel refers to the bending part of each soft pack cell lug 1 11 intersected and is superimposed, and tin sheet 2 is placed in to the upper surface of the cross facet of each bending part 11, and the cross facet length of the bending part 11 of each soft pack cell lug 1 is 5mm～10mm.
The initiating terminal of the bending part 11 of each soft pack cell lug 1 is reserved with certain circular arc degree, can avoid like this bending part 11 of soft pack cell lug 1 to occur snapping when soldering.
Above-described embodiment is used for illustrative purposes only; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be limited by each claim.
Claims (5)
1. the soft pack cell connection in series-parallel precision hot pressing welding procedure of a lithium battery group, it is characterized in that: first the lug end shaping bending of each soft pack cell extremely is applicable to connection status, again by the bending part of each soft pack cell lug and the virtual connection in series-parallel of tin sheet, then with the precision hot pressing welding machine, this virtual connection in series-parallel zone is looked for and a little exerted pressure and carry out the moment high-temperature heating, finally with refrigerating gas, cooling curing is carried out in this virtual connection in series-parallel zone.
2. a kind of soft pack cell connection in series-parallel precision hot pressing welding procedure of lithium battery group according to claim 1, it is characterized in that: described virtual connection in series-parallel refers to the bending part of each soft pack cell lug is intersected and is superimposed, and the tin sheet is placed in to the upper surface of the cross facet of each bending part.
3. the soft pack cell connection in series-parallel precision hot pressing welding procedure of a kind of lithium battery group according to claim 2, it is characterized in that: the cross facet length of the bending part of described each soft pack cell lug is 5mm～10mm.
4. the soft pack cell connection in series-parallel precision hot pressing welding procedure of a kind of lithium battery group according to claim 1, it is characterized in that: the initiating terminal of the bending part of described each soft pack cell lug is reserved with certain circular arc degree.
5. the soft pack cell connection in series-parallel precision hot pressing welding procedure of a kind of lithium battery group according to claim 1, it is characterized in that: be 2～5 seconds the heat time heating time of high-temperature heating described moment, and the heat applied should guarantee that on lug root and soft pack cell, the sealing part temperature is no more than 100 ℃ within the unit interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102021944A CN103464851A (en) | 2012-06-06 | 2012-06-06 | Series-parallel connection precise thermocompression bonding process for soft-packing cell lug of lithium battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102021944A CN103464851A (en) | 2012-06-06 | 2012-06-06 | Series-parallel connection precise thermocompression bonding process for soft-packing cell lug of lithium battery pack |
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| CN103464851A true CN103464851A (en) | 2013-12-25 |
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| CN2012102021944A Pending CN103464851A (en) | 2012-06-06 | 2012-06-06 | Series-parallel connection precise thermocompression bonding process for soft-packing cell lug of lithium battery pack |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271019A (en) * | 2016-08-31 | 2017-01-04 | 连云港正道电池技术有限公司 | The module welding procedure of flexible operation |
| CN106735953A (en) * | 2016-12-06 | 2017-05-31 | 浙江超威创元实业有限公司 | The indirect welding mechanism and its welding method of a kind of lithium ion battery |
| CN111687525A (en) * | 2020-06-12 | 2020-09-22 | 深圳市拓邦锂电池有限公司 | Method for welding tab of soft package lithium ion battery |
| CN112002868A (en) * | 2020-09-08 | 2020-11-27 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
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| US4015098A (en) * | 1970-11-23 | 1977-03-29 | General Motors Corporation | Apparatus for making intercell connectors by an extrusion-fusion technique |
| CN1289154A (en) * | 1999-09-21 | 2001-03-28 | 松下电器产业株式会社 | Cell and its making method |
| CN1898054A (en) * | 2003-12-24 | 2007-01-17 | 麦斯韦尔技术股份公司 | Brazing method for achieving mechanical and electrical connection between two pieces |
| JP2008123800A (en) * | 2006-11-10 | 2008-05-29 | Sanyo Electric Co Ltd | Connection structure and connection method for battery |
| CN102315407A (en) * | 2010-07-01 | 2012-01-11 | 通用汽车环球科技运作有限责任公司 | The battery fin connects and manufacturing approach |
| CN102332611A (en) * | 2011-09-23 | 2012-01-25 | 深圳市格瑞普电池有限公司 | Lithium ion battery pack and soldering method for single batteries therein |
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2012
- 2012-06-06 CN CN2012102021944A patent/CN103464851A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4015098A (en) * | 1970-11-23 | 1977-03-29 | General Motors Corporation | Apparatus for making intercell connectors by an extrusion-fusion technique |
| CN1289154A (en) * | 1999-09-21 | 2001-03-28 | 松下电器产业株式会社 | Cell and its making method |
| CN1898054A (en) * | 2003-12-24 | 2007-01-17 | 麦斯韦尔技术股份公司 | Brazing method for achieving mechanical and electrical connection between two pieces |
| JP2008123800A (en) * | 2006-11-10 | 2008-05-29 | Sanyo Electric Co Ltd | Connection structure and connection method for battery |
| CN102315407A (en) * | 2010-07-01 | 2012-01-11 | 通用汽车环球科技运作有限责任公司 | The battery fin connects and manufacturing approach |
| CN102332611A (en) * | 2011-09-23 | 2012-01-25 | 深圳市格瑞普电池有限公司 | Lithium ion battery pack and soldering method for single batteries therein |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271019A (en) * | 2016-08-31 | 2017-01-04 | 连云港正道电池技术有限公司 | The module welding procedure of flexible operation |
| CN106735953A (en) * | 2016-12-06 | 2017-05-31 | 浙江超威创元实业有限公司 | The indirect welding mechanism and its welding method of a kind of lithium ion battery |
| CN111687525A (en) * | 2020-06-12 | 2020-09-22 | 深圳市拓邦锂电池有限公司 | Method for welding tab of soft package lithium ion battery |
| CN112002868A (en) * | 2020-09-08 | 2020-11-27 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
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Application publication date: 20131225 |