CN212136495U - Cylindrical battery tab connecting structure - Google Patents
Cylindrical battery tab connecting structure Download PDFInfo
- Publication number
- CN212136495U CN212136495U CN202021119478.3U CN202021119478U CN212136495U CN 212136495 U CN212136495 U CN 212136495U CN 202021119478 U CN202021119478 U CN 202021119478U CN 212136495 U CN212136495 U CN 212136495U
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- China
- Prior art keywords
- positive
- cover plate
- negative
- negative pole
- ear
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- 238000003466 welding Methods 0.000 claims abstract description 33
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 32
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000005452 bending Methods 0.000 claims description 3
- 238000003698 laser cutting Methods 0.000 claims description 2
- 210000005069 ears Anatomy 0.000 claims 6
- 230000005611 electricity Effects 0.000 abstract description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 abstract 1
- 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 abstract 1
- 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 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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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
-
- 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
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a cylinder battery tab connection structure, the positive negative pole ear of lithium cell electricity core respectively with the current collection dish welded fastening of positive negative pole apron structure, the pole piece convolutes into cylindrical structure, positive negative pole ear distributes in cylindrical structure's both ends, the positive negative pole ear at every circle of pole piece both ends is buckled to cylindrical structure's centre of a circle department and is made the tip of the positive negative pole ear at cylindrical structure both ends overlap in cylindrical structure's centre of a circle department, thereby the overlap section mutual welding of positive negative pole ear forms lithium cell electricity core, the one end of current collection dish corresponds with the overlapping weld part of the positive negative pole ear of lithium cell and welds, the other end of current collection dish welds with the internal surface of positive negative pole apron. The utility model discloses lithium battery core's utmost point ear welds the back in advance, and lithium battery core is along with the current collector dish an organic whole arrange the casing in, and it is poor to improve the internal resistance uniformity that cylindrical battery caused because of laser welding effectively, the great problem of internal resistance, and the rosin joint that produces when also having avoided welding simultaneously, welds harmfully such as overwelding.
Description
Technical Field
The utility model relates to a power battery field specifically is a cylinder battery utmost point ear connection structure.
Background
At present, the connection mode of a cover plate and a lug of a lithium battery is connected in a welding mode, and the transmission function of conducting current and finishing charging and discharging of the battery is achieved. And cylindrical lithium ion battery because its electric core structure for full utmost point ear, the apron comes to carry out spot welding with utmost point ear through current collecting disc and is connected, and the area of overflowing is less relatively to there is following problem: the battery has large internal resistance and poor consistency, poor welding such as cold joint and over-welding exists during welding, and certain safety risk exists.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a cylinder battery utmost point ear connection structure to reduce the defective rate that the welding caused, improve the relatively poor shortcoming of battery internal resistance uniformity, improve the security performance of electric core.
The technical scheme of the utility model is that:
a cylindrical battery tab connection structure comprises a lithium battery cell and positive and negative electrode cover plate structures, wherein positive and negative electrode tabs of the lithium battery cell are respectively welded and fixed with current collecting discs of the positive and negative electrode cover plate structures, the positive and negative electrode tabs are respectively arranged at two ends of a pole piece, the pole piece is wound into a cylindrical structure, the positive and negative electrode tabs are distributed at two ends of the cylindrical structure, the positive and negative electrode tabs at two ends of each circle of the pole piece are bent towards the circle center of the cylindrical structure so that the end parts of the positive electrode tabs or the negative electrode tabs at one end of the cylindrical structure are overlapped at the circle center of the cylindrical structure, the overlapped parts of the positive electrode tabs are welded with each other, the overlapped parts of the negative electrode tabs are welded with each other to form a lithium battery cell, one end of the current collecting disc of the positive electrode cover plate structure is welded with the overlapped welding part, the size of one end of the current collecting disc is matched with the size of the positive and negative electrode lugs, the other end of the current collecting disc of the positive cover plate structure is welded with the inner surface of the positive cover plate structure, and the other end of the current collecting disc of the negative cover plate structure is welded with the inner surface of the negative cover plate structure.
The bending angle of the positive and negative electrode lugs at the two ends of the most inner ring of the pole piece of the lithium battery cell is 90 degrees, and the positive electrode lug or the negative electrode lug on each circle of the pole piece from inside to outside is respectively overlapped on the positive electrode lug or the negative electrode lug of the adjacent inner ring.
The pole piece adopts the mode of laser cutting utmost point ear to cut out positive and negative pole ear.
The overlapped parts of the positive electrode lugs are mutually subjected to ultrasonic welding, and the overlapped parts of the negative electrode lugs are mutually subjected to ultrasonic welding.
The one end of positive cover plate structure current collector plate and the overlapping weld part of the positive ear of lithium battery cell carry out ultrasonic welding, the current collector plate one end of negative cover plate structure and the overlapping weld part of the negative ear of lithium battery cell carry out ultrasonic welding, the other end of positive cover plate structure current collector plate and the internal surface of positive cover plate structure carry out laser welding, the other end of negative cover plate structure current collector plate and the internal surface of negative cover plate structure carry out laser welding.
The utility model has the advantages that:
the utility model discloses the utmost point ear of lithium cell electricity core coiling pole piece both ends is folding earlier and makes utmost point ear gather together through the mode of ultrasonic welding, carries out prewelding earlier promptly for the utmost point ear is in the follow-up welding time, makes the utmost point ear keep an organic whole; after the lugs of the lithium battery cell are prewelded, the lithium battery cell is integrally arranged in the shell along with the current collecting disc, the problems of poor internal resistance consistency and large internal resistance of the cylindrical battery caused by laser welding can be effectively solved by the connection mode, and poor welding such as insufficient welding, over welding and the like during welding is also avoided.
Drawings
Fig. 1 is the structure schematic diagram of the lithium battery cell pole piece of the present invention.
Fig. 2 is a schematic diagram of a structure of a lithium battery cell of the present invention.
Fig. 3 is the utility model discloses lithium cell electric core utmost point ear and current collection dish welded structure schematic diagram.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, a cylindrical battery tab connection structure comprises a lithium battery cell and positive and negative electrode cover plate structures, wherein a positive and negative electrode tab 2 is cut from a pole piece 1 of the lithium battery cell by a laser tab cutting method, the positive and negative electrode tabs 2 of the lithium battery cell are respectively welded and fixed with a current collecting disc 3 of the positive and negative electrode cover plate structures, the positive and negative electrode tabs 2 are respectively arranged at two ends of the pole piece 1, the pole piece 1 is wound into a cylindrical structure, the positive and negative electrode tabs 2 are distributed at two ends of the cylindrical structure, the positive and negative electrode tabs 2 at two ends of each circle of the pole piece 1 are bent towards the center of the cylindrical structure so that the end parts of the positive or negative electrode tab at one end of the cylindrical structure are overlapped at the center of the cylindrical structure, the bending angle of the positive and negative electrode tabs 2 at two ends of the pole piece 1 at the innermost circle of the lithium battery cell is 90 degrees, the, the overlapped parts of the positive lugs are mutually subjected to ultrasonic welding, and the overlapped parts of the negative lugs are mutually subjected to ultrasonic welding, so that a lithium battery cell is formed; one end of the current collecting disc 3 of the positive cover plate structure is ultrasonically welded with the overlapping welding part of the positive lug of the lithium battery cell, one end of the current collecting disc of the negative cover plate structure is ultrasonically welded with the overlapping welding part of the negative lug of the lithium battery cell, the size of one end part of the current collecting disc 3 is matched with the size of the positive lug and the negative lug 2, the other end of the current collecting disc 3 of the positive cover plate structure is laser welded with the inner surface of the positive cover plate structure, the other end of the current collecting disc 3 of the negative cover plate structure is laser welded with the inner surface of the negative cover plate structure, and the size of the other end part of the.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a cylinder battery utmost point ear connection structure which characterized in that: the lithium battery comprises a lithium battery cell and positive and negative pole cover plate structures, wherein positive and negative pole ears of the lithium battery cell are respectively welded and fixed with current collecting discs of the positive and negative pole cover plate structures, the positive and negative pole ears are respectively arranged at two ends of a pole piece, the pole piece is wound into a cylindrical structure, the positive and negative pole ears are distributed at two ends of the cylindrical structure, the positive and negative pole ears at two ends of each circle of the pole piece are bent towards the circle center of the cylindrical structure, so that the end parts of the positive pole ear or the negative pole ear at one end of the cylindrical structure are overlapped at the circle center of the cylindrical structure, the overlapped parts of the positive pole ears are mutually welded, the overlapped parts of the negative pole ears are mutually welded to form the lithium battery cell, one end of the current collecting disc of the positive pole cover plate structure is welded with the overlapped, the size of one end of the current collecting disc is matched with the size of the positive and negative electrode lugs, the other end of the current collecting disc of the positive cover plate structure is welded with the inner surface of the positive cover plate structure, and the other end of the current collecting disc of the negative cover plate structure is welded with the inner surface of the negative cover plate structure.
2. The cylindrical battery tab connection structure as claimed in claim 1, wherein: the bending angle of the positive and negative electrode lugs at the two ends of the most inner ring of the pole piece of the lithium battery cell is 90 degrees, and the positive electrode lug or the negative electrode lug on each circle of the pole piece from inside to outside is respectively overlapped on the positive electrode lug or the negative electrode lug of the adjacent inner ring.
3. The cylindrical battery tab connection structure as claimed in claim 1, wherein: the pole piece adopts the mode of laser cutting utmost point ear to cut out positive and negative pole ear.
4. The cylindrical battery tab connection structure as claimed in claim 1, wherein: the overlapped parts of the positive electrode lugs are mutually subjected to ultrasonic welding, and the overlapped parts of the negative electrode lugs are mutually subjected to ultrasonic welding.
5. The cylindrical battery tab connection structure as claimed in claim 1, wherein: the one end of positive cover plate structure current collector plate and the overlapping weld part of the positive ear of lithium battery cell carry out ultrasonic welding, the current collector plate one end of negative cover plate structure and the overlapping weld part of the negative ear of lithium battery cell carry out ultrasonic welding, the other end of positive cover plate structure current collector plate and the internal surface of positive cover plate structure carry out laser welding, the other end of negative cover plate structure current collector plate and the internal surface of negative cover plate structure carry out laser welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021119478.3U CN212136495U (en) | 2020-06-16 | 2020-06-16 | Cylindrical battery tab connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021119478.3U CN212136495U (en) | 2020-06-16 | 2020-06-16 | Cylindrical battery tab connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212136495U true CN212136495U (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021119478.3U Active CN212136495U (en) | 2020-06-16 | 2020-06-16 | Cylindrical battery tab connecting structure |
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| CN (1) | CN212136495U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649684A (en) * | 2021-08-24 | 2021-11-16 | 江西迪比科股份有限公司 | Ultrasonic welding equipment and process for bottom welding of cylindrical lithium ion battery cathode |
| CN114759317A (en) * | 2022-04-13 | 2022-07-15 | 广州小鹏汽车科技有限公司 | Utmost point ear structure, cylinder electricity core and vehicle |
| CN115548421A (en) * | 2022-07-29 | 2022-12-30 | 江苏正力新能电池技术有限公司 | Preparation method of cylindrical battery, cylindrical battery and electric device |
| CN116315034A (en) * | 2022-11-02 | 2023-06-23 | 南京工业大学 | Electrodeless lug aging-resistant polygonal prism lithium ion battery |
| WO2023206949A1 (en) * | 2022-04-29 | 2023-11-02 | 宁德时代新能源科技股份有限公司 | Cylindrical electrode assembly, battery cell, battery, electrical device, and manufacturing method |
-
2020
- 2020-06-16 CN CN202021119478.3U patent/CN212136495U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649684A (en) * | 2021-08-24 | 2021-11-16 | 江西迪比科股份有限公司 | Ultrasonic welding equipment and process for bottom welding of cylindrical lithium ion battery cathode |
| CN114759317A (en) * | 2022-04-13 | 2022-07-15 | 广州小鹏汽车科技有限公司 | Utmost point ear structure, cylinder electricity core and vehicle |
| CN114759317B (en) * | 2022-04-13 | 2024-09-03 | 广州小鹏汽车科技有限公司 | Tab structure, cylindrical battery cell and vehicle |
| WO2023206949A1 (en) * | 2022-04-29 | 2023-11-02 | 宁德时代新能源科技股份有限公司 | Cylindrical electrode assembly, battery cell, battery, electrical device, and manufacturing method |
| CN115548421A (en) * | 2022-07-29 | 2022-12-30 | 江苏正力新能电池技术有限公司 | Preparation method of cylindrical battery, cylindrical battery and electric device |
| CN116315034A (en) * | 2022-11-02 | 2023-06-23 | 南京工业大学 | Electrodeless lug aging-resistant polygonal prism lithium ion battery |
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| GR01 | Patent grant | ||
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