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Anode aluminum alloy nut cap for cylindrical lithium ion battery

A lithium-ion battery, cylindrical technology, applied to battery pack parts, circuits, electrical components, etc., can solve problems such as increased internal resistance of welding points, low bonding strength of spot welding, and affecting battery pack service life, etc., to achieve easy mechanical Improvement of sealing, series and parallel reliability, and effect of improving reliability

Inactive Publication Date: 2011-02-02
杭州海孚新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional series and parallel connections of battery packs are usually connected with the battery by spot welding, but the thicker copper spot welding has low bonding strength, and long-term use may increase the internal resistance of the welding point and affect the service life of the battery pack.

Method used

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  • Anode aluminum alloy nut cap for cylindrical lithium ion battery
  • Anode aluminum alloy nut cap for cylindrical lithium ion battery
  • Anode aluminum alloy nut cap for cylindrical lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The positive electrode of the cylindrical lithium-ion battery is a cold-rolled 3003 aluminum alloy cap, the height of the top of the stud from the upper surface of the cover is 12 mm, and the outer diameter of the stud is 5 mm. The diameter of the upper and lower ends of the central hole of the stepped cylinder is 2mm, and the diameter of the central hole is 1mm. The upper diameter of the circumferential cover is 32 mm, the thickness is 0.5 mm, and the lower diameter of the circumferential cover is 31 mm.

Embodiment 2

[0014] The positive electrode of the cylindrical lithium-ion battery is a cold-rolled 3003 aluminum alloy cap, the height of the top of the stud from the upper surface of the cover is 15 mm, and the outer diameter of the stud is 8 mm. The diameter of the upper and lower ends of the central hole of the stepped cylinder is 3mm, and the diameter of the central hole is 1.5mm. The upper diameter of the circumferential cover is 40 mm, the thickness is 0.8 mm, and the lower diameter of the circumferential cover is 38.4 mm.

Embodiment 3

[0016] The positive electrode of the cylindrical lithium-ion battery is a cold-rolled 3003 aluminum alloy cap, the height of the top of the stud from the upper surface of the cover is 25 mm, and the outer diameter of the stud is 12 mm. The diameter of the upper and lower ends of the central hole of the stepped cylinder is 4mm, and the diameter of the central hole is 2mm. The upper diameter of the circumferential cover is 60 mm, the thickness is 1.0 mm, and the lower diameter of the circumferential cover is 58 mm.

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Abstract

The invention discloses an anode aluminum alloy nut cap for a cylindrical lithium ion battery. The anode aluminum alloy nut cap is a stepped cylinder, the upper part of the cylinder is provided with a stud, and the lower part of the cylinder is provided with a cover plate; a step is arranged between the cover plate and the stud; the stepped cylinder is provided with a liquid-filling central bore, bore diameters of upper and lower ends of the central bore are greater those of the middle part of the central bore, and the diameter of the upper part of the circumferential cover plate is greater than that of the lower part to form an annular step. A high-capacity lithium ion battery shell assembled by the anode nut cap of the aluminum alloy lithium ion battery has the advantages of improving the reliability of connection among the batteries along with high mechanical strength, good heat dissipation, safety and voltage withstanding.

Description

technical field [0001] The invention relates to a positive electrode cap of a lithium ion battery. Background technique [0002] The development of electric vehicles requires lithium-ion power batteries to have higher energy density and power density. The traditional series and parallel connection of battery packs usually uses spot welding to connect the connecting piece to the battery, but the bonding strength of thick copper spot welding is low, and long-term use may increase the internal resistance of the welding point and affect the service life of the battery pack. The high-strength and lightweight aluminum alloy shell can effectively reduce the weight of the battery and improve the heat dissipation performance of the battery. A reasonable battery structure design is conducive to the assembly, manufacture and use of the battery, and ensures the reliability and safety of the battery pack during use. Contents of the invention [0003] The purpose of the present invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01M50/152H01M50/627
CPCY02E60/10
Inventor 张文魁梁文明叶张军吴志川胡纯利涂江平
Owner 杭州海孚新能源科技有限公司
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