CN214489211U - Welding needle suitable for resistance welding of full-lug cylindrical lithium ion battery - Google Patents
Welding needle suitable for resistance welding of full-lug cylindrical lithium ion battery Download PDFInfo
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- CN214489211U CN214489211U CN202120290429.4U CN202120290429U CN214489211U CN 214489211 U CN214489211 U CN 214489211U CN 202120290429 U CN202120290429 U CN 202120290429U CN 214489211 U CN214489211 U CN 214489211U
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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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- 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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Abstract
The utility model relates to a battery welding technology field, concretely relates to be suitable for welding needle that full utmost point ear cylinder lithium ion battery resistance welded, include from last syringe needle section, linkage segment and the tail section of rigid coupling extremely down in proper order, the diameter of linkage segment is less than the diameter of tail section, and the syringe needle section is provided with two at least syringe needle bodies of erectting the setting and independent each other. In the resistance welding process of the cathode current collecting disc and the steel shell of the cylindrical lithium ion battery, the welding of the application can improve the capacity of large-current charging and discharging, reduce the heat generated due to large welding impedance, meet the performance of the battery such as multiplying power performance, high-power charging and discharging, quick charging and the like, and the welding pin can greatly improve the strength and stability of resistance welding and improve the qualification rate.
Description
Technical Field
The utility model relates to a battery welding technology field, concretely relates to be suitable for welding needle that full utmost point ear cylinder lithium ion battery resistance welded.
Background
In the field of cylindrical ion battery manufacturing, resistance welding is still the mainstream technology for the negative electrode tab and the bottom of a steel shell, but with the continuous improvement of the requirements of battery multiplying power performance, high-power charging and discharging, quick charging and the like, the cylindrical lithium ion battery with a full tab and current collecting disc laser welding structure is more and more concerned, but the existing full tab cylindrical lithium ion battery mostly adopts a cover plate with a connecting sheet and an aluminum shell to carry out laser welding sealing packaging, and the packaging structural member cost and the manufacturing cost of the full tab cylindrical lithium ion battery are far higher than those of cylindrical batteries with steel shell rolling grooves and button type sealing structures.
In order to increase the capacity of a large current passing through a resistance welding spot of a cathode current collecting disc of a battery with a steel shell structure and the bottom of a steel shell, the diameter of a welding needle is increased in the prior art, so that a welding spot with a larger diameter is obtained, and the current conducting area is increased; however, the increase in the diameter of the welding pin disperses the welding current in resistance welding, and it is difficult to obtain good welding strength and stability, and if the current strength is increased to obtain a better welding effect, it is easy to cause over-welding, poor appearance, and poor welding effect.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the not enough among the prior art, and provide a weld needle that welds effectually and be suitable for full utmost point ear cylinder lithium ion battery resistance to weld.
The purpose of the utility model is realized through the following technical scheme: the application provides a be suitable for welding needle that resistance of full utmost point ear cylinder lithium ion battery welded, include from last syringe needle section, linkage segment and the tail section of extremely lower rigid coupling in proper order, the diameter of linkage segment is less than the diameter of tail section, and the syringe needle section is provided with two at least syringe needle bodies of erectting the setting and independent each other.
Wherein the end of the tail section facing the connection section is provided with a first frustum portion.
Wherein, the end of the connecting section towards the needle head section is provided with a second conical part.
Wherein, the root of each syringe needle body all outwards forms third frustum portion.
Wherein, the diameter of the needle body is 1mm-3 mm.
Wherein the diameter of the tail section is 3mm-8 mm.
Wherein, the needle head section, the connecting section or the tail section is made of one or the combination of more than two of red copper, chromium zirconium copper, aluminum copper oxide and tungsten copper.
Wherein the length of the welding needle is 100mm-300 mm.
The utility model has the advantages that: the welding pin suitable for resistance welding of the full-lug cylindrical lithium ion battery can improve the capacity of large-current charging and discharging, reduce heat generated due to large welding impedance, meet the performances of multiplying power performance, high-power charging and discharging, quick charging and the like of the battery, greatly improve the strength and stability of resistance welding and improve the qualification rate by adopting the welding pin in the resistance welding process of a negative current collecting disc and a steel shell of the cylindrical lithium ion battery; in addition, the negative electrode current collecting disc and the steel shell are in sealed connection by adopting the welding pin of the application to perform resistance welding, and the packaging is not required to be performed by laser welding, so that the packaging material and the manufacturing cost are greatly saved.
Drawings
The present invention is further explained by using the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the following drawings without any inventive work.
Fig. 1 is a schematic structural view of a welding pin in the present embodiment.
Fig. 2 is an exploded view of the welding pin of the present embodiment.
Fig. 3 is an enlarged view of a point a in fig. 1.
Description of the drawings: a tail section 1, a first frustum part 11, a connecting section 2, a second frustum part 21, a needle body 3 and a third frustum part 31.
Detailed Description
The invention will be further described with reference to the following examples.
The utility model discloses a be suitable for full utmost point ear cylinder lithium ion battery resistance welding's welding needle's concrete implementation mode, as shown in fig. 1 to fig. 3, include from last to needle head section, linkage segment 2 and the tail section 1 of rigid coupling in proper order down, the diameter of linkage segment 2 is less than the diameter of tail section 1, and tail end 1 forms pole portion with linkage segment 2, and the cross sectional area of pole portion from tail end 1 to linkage segment 2 reduces gradually, is favorable to gathering of electric current when welding, improves welding strength, reinforcing stability. The needle head section is provided with at least two vertically arranged and mutually independent needle head bodies 3, specifically, the diameter of the needle head body 3 is 1mm-3mm, the needle head bodies 3 are small and respectively independent, the current is concentrated and is not easy to disperse during welding, the welding appearance is good, and therefore the welding quality is improved.
In this embodiment, syringe needle body 3 is provided with threely, and the design of many syringe needles, welding strength is high, and the combined area is big, and the ability reinforce overflows, and gained battery multiplying power performance is good.
In the present embodiment, the end of the tail section 1 facing the connection section 2 is provided with a first frustum portion 11. The end of the connecting section 2 facing the needle section is provided with a second conical land portion 21. The peripheral side surface of the first frustum portion 11 and the peripheral side surface of the first frustum portion 21 are smooth surfaces, so that a smooth transition region is formed, a welding needle is more smoothly inserted into a center hole of a battery, and the insertion injury of the battery can be prevented.
In the present embodiment, as shown in fig. 3, the root of each needle body 3 is outward to form a third frustum portion 31, and the cross-sectional area of the third frustum portion 31 is gradually reduced, which is beneficial to the collection of current during welding, improves the welding strength, and enhances the stability. The outer peripheral side surface of the third tapered portion 31 is also a smooth surface, so that the insertion of the welding pin into the center hole of the battery can be made smoother, and the insertion of the battery can be prevented.
In the embodiment, the needle head section, the connecting section 2 or the tail section 1 is made of one or a combination of more than two of red copper, chromium zirconium copper, aluminum oxide copper and tungsten copper.
In this embodiment, the diameter of the needle body 3 may be 1mm to 3 mm; the diameter of the tail section 1 can be 3mm-8mm, which can provide enough strength and is beneficial to welding of batteries with higher size. The length of the welding pin can be prepared to be 100mm-300 mm. In the present embodiment, a welding pin having a maximum diameter of 6mm and a length of 145mm is exemplified. The diameter of the tail section 1 is 6mm, the length of the tail section is 70mm, the diameter of the top surface of the first conical table part 11 is 5mm, and the tail section 1 is made of aluminum oxide copper; the diameter of the connecting section 2 is 5mm, the length is 60mm, and the diameter of the top surface of the second cone-shaped table part 21 is 5 mm; the connecting section 2 is made of tungsten copper; the total length of the needle body 3 is 10mm, wherein the length of the third conical part 31 is 3mm, the needle body is 7mm, the diameter of the needle body is 1.5mm, and the needle head section is made of tungsten copper.
The welding pin for resistance welding of the cylindrical lithium ion battery with the full tabs adopts a three-section structure, and in a resistance welding process of a negative current collecting disc and a steel shell of the cylindrical lithium ion battery, the welding pin can improve the capacity of heavy current charging and discharging, reduce heat generated by large welding impedance, and meet the performances of multiplying power performance, high-power charging and discharging, quick charging and the like of the battery; in addition, the negative electrode current collecting disc and the steel shell are in sealed connection by adopting the welding pin of the application to perform resistance welding, and the packaging is not required to be performed by laser welding, so that the packaging material and the manufacturing cost are greatly saved.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. Be suitable for welding needle that full utmost point ear cylinder lithium ion battery resistance welded, its characterized in that: include from last syringe needle section, linkage segment and the tail section of extremely down rigid coupling in proper order, the diameter of linkage segment is less than the diameter of tail section, the syringe needle section is provided with two at least and erects setting and independent syringe needle body each other.
2. The welding needle suitable for resistance welding of the full-lug cylindrical lithium ion battery according to claim 1, characterized in that: the end of the tail section facing the connecting section is provided with a first frustum portion.
3. The welding needle suitable for resistance welding of the full-lug cylindrical lithium ion battery according to claim 1, characterized in that: the end of the connecting section facing the needle section is provided with a second conical table portion.
4. The welding pin suitable for resistance welding of the full-lug cylindrical lithium ion battery according to any one of claims 1 to 3, wherein: the root of each needle body is outward to form a third frustum part.
5. The welding needle suitable for resistance welding of the full-lug cylindrical lithium ion battery according to claim 1, characterized in that: the diameter of the needle body is 1mm-3 mm.
6. The welding needle suitable for resistance welding of the full-lug cylindrical lithium ion battery according to claim 1, characterized in that: the diameter of the tail section is 3mm-8 mm.
7. The welding needle suitable for resistance welding of the full-lug cylindrical lithium ion battery according to claim 1, characterized in that: the needle head section, the connecting section or the tail section is made of one or the combination of more than two of red copper, chromium zirconium copper, aluminum oxide copper and tungsten copper.
8. The welding needle suitable for resistance welding of the full-lug cylindrical lithium ion battery according to claim 1, characterized in that: the length of the welding needle is 100mm-300 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120290429.4U CN214489211U (en) | 2021-02-01 | 2021-02-01 | Welding needle suitable for resistance welding of full-lug cylindrical lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120290429.4U CN214489211U (en) | 2021-02-01 | 2021-02-01 | Welding needle suitable for resistance welding of full-lug cylindrical lithium ion battery |
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| CN214489211U true CN214489211U (en) | 2021-10-26 |
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| CN202120290429.4U Active CN214489211U (en) | 2021-02-01 | 2021-02-01 | Welding needle suitable for resistance welding of full-lug cylindrical lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117620392A (en) * | 2023-12-15 | 2024-03-01 | 东莞市创明电池技术有限公司 | Resistance welding jig and method for columnar battery |
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2021
- 2021-02-01 CN CN202120290429.4U patent/CN214489211U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117620392A (en) * | 2023-12-15 | 2024-03-01 | 东莞市创明电池技术有限公司 | Resistance welding jig and method for columnar battery |
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