CN205335338U - Power lithium cell electricity core and header connection structure - Google Patents
Power lithium cell electricity core and header connection structure Download PDFInfo
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- CN205335338U CN205335338U CN201521121184.3U CN201521121184U CN205335338U CN 205335338 U CN205335338 U CN 205335338U CN 201521121184 U CN201521121184 U CN 201521121184U CN 205335338 U CN205335338 U CN 205335338U
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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 utility model provides a power lithium cell electricity core and header connection structure. Belong to lithium ion power batteries technical field. It mainly is a problem of solving current flexible coupling reliability. Its leading features is: electric core and top cap including the dispersion, the electric core that disperses on average divides into the electric core of first group, the electric core of second group, and the utmost point ear outside difference spot welding of first group electricity core, the electric core of second group forms first group prewelding plane, second group prewelding plane, first group prewelding plane, second group prewelding plane and the direct laser welding of the utmost point styletable face of top cap. The utility model has the characteristics of simple process welds the good reliability, is favorable to the production of follow -up equipment and notes liquid process, mainly used has multipolar ear structure and rolls up being connected of utmost point intercolumniation on core and the top cap.
Description
Technical field
This utility model belongs to lithium-ion-power cell technical field, is specifically related to the attachment structure of the internal core of a kind of lithium-ion-power cell parts, particularly lithium-ion-power cell and housing cover pole。
Background technology
Lithium-ion-power cell is generally made up of multiple core, and the circuit path of each core needs effectively to be connected with the pole on battery container cover plate, requires that circuit connects reliable, durable, can bear mechanical shock, and can bear high current charge-discharge in use procedure。For this, the lug 2 of battery core 1 uses deformable and has the sheet 5 that is flexible coupling of certain conductive capability before being connected with the pole between the pole of top cover 6, and adopt repeatedly prewelding & ultra-sonic welded 3, laser weld 4 and detection to ensure connection reliability, as shown in Figure 1 and Figure 2。In design in the past, first sheet 5 Laser Welding that is flexible coupling is welded on the pole of top cover 6, the lug 2 of battery core 1 then uses closely-pitched soldering tip to carry out prewelding, again the lug 2 welded in advance is carried out large power supersonic weldering with the sheet 5 that is flexible coupling, often the prewelding of lug 2 causes welding effect bad with soldering tip para-position deviation when being in large power supersonic weldering, large power supersonic welding technology is immature simultaneously, the soldering tip life-span only has 5 ~ 80,000 times, additionally need to avoid top cover 5 during ultrasonic horn welding interfere and roll over lug (zigzag bending) position can not at weld, so being flexible coupling, sector-meeting is longer when taking fluid injection, and electrolyte space causes battery to need secondary fluid injection when producing。Need for this to adopt new design to replace the existing mode being flexible coupling, ensureing on the basis of battery performance, reduce technology difficulty, improve battery quality。
Summary of the invention
This utility model provides a kind of and has, for overcoming the defect of prior art, power lithium cell electric core and the top cover connecting structure that connection is reliable, easy to produce。
Technical solution of the present utility model is: a kind of power lithium cell electric core and top cover connecting structure, including scattered battery core and top cover, it is characterized in that: described scattered battery core is divided into first group of battery core, second group of battery core, first group of battery core, second group of battery core lug outside respectively means of spot welds form first group of prewelding plane, second group of prewelding plane；First group of prewelding plane, second group of prewelding plane are welded with the pole end face Direct Laser of top cover。
The area of first described in technical solution of the present utility model group prewelding plane, second group of prewelding plane and pole end face is 2:1。
This utility model owing to being divided into first group of battery core, second group of battery core by scattered for dynamic lithium battery battery core, first group of battery core, second group of battery core lug outside respectively means of spot welds form first group of prewelding plane, second group of prewelding plane, plane formula prewelding is for ease of follow-up battery core and the laser weld of pole on top cover, first group of prewelding plane, second group of prewelding plane are welded with the pole end face Direct Laser of top cover, constitute the Novel electric core and pole attachment structure of cancelling the existing sheet that is flexible coupling, use Laser Welding to replace ultrasonic bond to have the reliable feature of Weldability。The simple soldering reliability of technique is strong, is conducive to the feature of the production of follow-up assembling and fluid injection operation。This utility model is mainly used in the connection having lithium ion power battery core with pole。
Accompanying drawing explanation
Fig. 1 is the attachment structure schematic diagram of existing battery core and top cover pole。
Fig. 2 is the folding extreme ear structure schematic diagram of existing battery core and top cover pole。
Fig. 3 is the attachment structure schematic diagram of this utility model battery core and top cover pole。
Fig. 4 is folding extreme ear structure schematic diagram of the present utility model。
In figure: 1, battery core, 2, lug, 3, prewelding & ultra-sonic welded, 4, laser weld, 5, be flexible coupling sheet, 6, top cover, 7, first group of battery core, 8, lug, 9, the pre-welding position of laser weld &, 10, lug, 11, second group of battery core。
Detailed description of the invention
As shown in Figure 3, Figure 4。This utility model power lithium cell electric core and top cover connecting structure include scattered battery core and top cover 6, scattered battery core is divided into 7, second group of battery core 11 of first group of battery core, outside the lug 8,10 of 7, second group of battery core 11 of first group of battery core, the mode of a small amount of means of spot welds and plane compaction forms high-quality first group of prewelding plane, second group of prewelding plane respectively, mode is ultrasonic bonding or big pressure hot weld, can carry out Laser Welding by pole directly and on top cover 6。The area of first group of prewelding plane, second group of prewelding plane and pole end face is 2:1。First group of prewelding plane, second group of prewelding plane are welded with the pole end face Direct Laser of top cover 6。
This utility model cancels the sheet 5 that is flexible coupling, and cancels Laser Welding Processes and apparatus between the pole in the direct battery core and top cover that are flexible coupling, and folding lug technique reduces zigzag bending, uses Laser Welding to replace ultrasonic bond to have the reliable feature of Weldability。This utility model simplifies structure and makes battery in process of production, and welding performance is stable, and laser welding head far above ultrasonic bond, improves battery up to life-span of 20,000,000 times。
Claims (2)
1. a power lithium cell electric core and top cover connecting structure, including scattered battery core and top cover, it is characterized in that: described scattered battery core is divided into first group of battery core, second group of battery core, first group of battery core, second group of battery core lug outside respectively means of spot welds form first group of prewelding plane, second group of prewelding plane；First group of prewelding plane, second group of prewelding plane are welded with the pole end face Direct Laser of top cover。
2. a kind of power lithium cell electric core according to claim 1 and top cover connecting structure, it is characterised in that: the area of first group of described prewelding plane, second group of prewelding plane and pole end face is 2:1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521121184.3U CN205335338U (en) | 2015-12-31 | 2015-12-31 | Power lithium cell electricity core and header connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521121184.3U CN205335338U (en) | 2015-12-31 | 2015-12-31 | Power lithium cell electricity core and header connection structure |
Publications (1)
| Publication Number | Publication Date |
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| CN205335338U true CN205335338U (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521121184.3U Active CN205335338U (en) | 2015-12-31 | 2015-12-31 | Power lithium cell electricity core and header connection structure |
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| CN (1) | CN205335338U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108933222A (en) * | 2018-07-09 | 2018-12-04 | 东莞塔菲尔新能源科技有限公司 | A kind of preparation method of the secondary lithium battery of multi pole ears |
| CN109148806A (en) * | 2018-07-18 | 2019-01-04 | 湖北锂诺新能源科技有限公司 | The cell polar ear and top cover connection method and connection structure of power battery |
| CN109860496A (en) * | 2018-12-18 | 2019-06-07 | 江苏塔菲尔新能源科技股份有限公司 | A kind of welding method and device of battery pole ear |
| CN112453735A (en) * | 2020-10-09 | 2021-03-09 | 湖北亿纬动力有限公司 | Tab welding method, battery manufacturing method and battery |
| CN112652865A (en) * | 2020-07-15 | 2021-04-13 | 中航锂电（洛阳）有限公司 | Battery and battery manufacturing method |
| CN113458635A (en) * | 2020-03-31 | 2021-10-01 | 比亚迪股份有限公司 | Method for welding tab and cover plate and battery assembly |
| CN114284647A (en) * | 2021-12-17 | 2022-04-05 | 上海瑞浦青创新能源有限公司 | Connecting structure of lithium battery non-isopolar lug and polar column |
-
2015
- 2015-12-31 CN CN201521121184.3U patent/CN205335338U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108933222A (en) * | 2018-07-09 | 2018-12-04 | 东莞塔菲尔新能源科技有限公司 | A kind of preparation method of the secondary lithium battery of multi pole ears |
| CN108933222B (en) * | 2018-07-09 | 2019-05-28 | 东莞塔菲尔新能源科技有限公司 | A kind of preparation method of the secondary lithium battery of multi pole ears |
| CN109148806A (en) * | 2018-07-18 | 2019-01-04 | 湖北锂诺新能源科技有限公司 | The cell polar ear and top cover connection method and connection structure of power battery |
| CN109860496A (en) * | 2018-12-18 | 2019-06-07 | 江苏塔菲尔新能源科技股份有限公司 | A kind of welding method and device of battery pole ear |
| CN113458635A (en) * | 2020-03-31 | 2021-10-01 | 比亚迪股份有限公司 | Method for welding tab and cover plate and battery assembly |
| CN112652865A (en) * | 2020-07-15 | 2021-04-13 | 中航锂电（洛阳）有限公司 | Battery and battery manufacturing method |
| CN112453735A (en) * | 2020-10-09 | 2021-03-09 | 湖北亿纬动力有限公司 | Tab welding method, battery manufacturing method and battery |
| CN114284647A (en) * | 2021-12-17 | 2022-04-05 | 上海瑞浦青创新能源有限公司 | Connecting structure of lithium battery non-isopolar lug and polar column |
| CN114284647B (en) * | 2021-12-17 | 2023-12-05 | 上海瑞浦青创新能源有限公司 | Connection structure of unequal tab and pole of lithium battery |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |