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High-sealing lithium ion battery cap and manufacturing method thereof

A lithium-ion battery, high-sealing technology, applied in the direction of battery cover/end cover, sealing material, battery pack components, etc., can solve problems such as liquid leakage, decreased sealing ability, and impact on battery output voltage

Pending Publication Date: 2022-05-27
安徽捷创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing lithium-ion battery cap sealing ring is usually made of non-metallic materials such as plastics. After long-term storage or use, due to the decline in sealing ability, liquid leakage will occur, which will not only damage the battery itself, but also cause leakage of the battery. The liquid is highly corrosive and will cause harm to electronic products and users
In addition, the lithium battery caps on the market are more or less insufficient in safety, and the internal resistance is large, which affects the output voltage of the battery and causes the battery to fail to charge and discharge normally.

Method used

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  • High-sealing lithium ion battery cap and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] Preferably, the preparation method of the allyltrimethoxysilane / N-(4-cyano-3-trifluoromethylphenyl)methacrylamide / isobornyl acrylate copolymer comprises: mixing allyl Trimethoxysilane, N-(4-cyano-3-trifluoromethylphenyl)methacrylamide, isobornyl acrylate, and initiator were added to a high-boiling solvent, in an inert gas atmosphere, 50-65 The reaction was stirred at ℃ for 3-5 hours, then precipitated in water, washed with ethanol for 2-6 times, and finally placed in a vacuum drying oven at 85-95 ℃ to dry to constant weight to obtain allyltrimethoxy Silane / N-(4-cyano-3-trifluoromethylphenyl)methacrylamide / isobornyl acrylate copolymer.

[0025] Preferably, the mass ratio of allyltrimethoxysilane, N-(4-cyano-3-trifluoromethylphenyl)methacrylamide, isobornyl acrylate, initiator and high boiling point solvent is (0.5-0.8):(3-5):(0.8-1.2):(0.05-0.07):(25-35).

[0026] Preferably, the initiator is azobisisobutyronitrile; the high boiling point solvent is dimethyl sulfoxide,...

Embodiment 1

[0037] Embodiment 1 provides a high-sealing lithium-ion battery cap, which is characterized in that it includes a top cover 1 and a base 2 arranged in sequence from top to bottom; the top cover 1 and the base 2 are connected by bolts 3; The base 2 is fixedly connected; an explosion-proof cavity 5 is formed between the top cover 1 and the base 2 ; the base 2 is machined with an annular explosion-proof notch 4 that ruptures under a specific pressure; A sealing ring 6 is provided; the sealing ring 6 and the outer wall of the explosion-proof cavity 5 are bonded by an adhesive; the sealing ring 6 is made of the following components by weight: 80 parts of nitrile rubber, olefin 15 parts of propyltrimethoxysilane / N-(4-cyano-3-trifluoromethylphenyl)methacrylamide / isobornyl acrylate copolymer, 2 parts of sodium polydithiodipropane sulfonate, five parts 0.5 part of phosphorus oxide, 0.1 part of polyphosphoric acid, 3 parts of vulcanizing agent, 2 parts of anti-aging agent, and 20 parts ...

Embodiment 2

[0045] Example 2 provides a high-sealing lithium-ion battery cap, which is basically the same as Example 1, except that the sealing ring 6 is made of the following components in parts by weight: nitrile rubber 85 parts, 17 parts of allyltrimethoxysilane / N-(4-cyano-3-trifluoromethylphenyl)methacrylamide / isobornyl acrylate copolymer, 2.3 parts of sodium polydithiodipropanesulfonate parts, 0.7 parts of phosphorus pentoxide, 0.2 parts of polyphosphoric acid, 4 parts of vulcanizing agent, 3 parts of anti-aging agent, and 23 parts of filler; the allyl trimethoxysilane, N-(4-cyano-3-trimethoxysilane) The mass ratio of fluoromethylphenyl) methacrylamide, isobornyl acrylate, initiator, and high boiling point solvent is 0.6:3.5:0.9:0.06:28.

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Abstract

The invention discloses a high-sealing-performance lithium ion battery cap and a manufacturing method thereof. The high-sealing-performance lithium ion battery cap comprises a top cover and a base which are sequentially arranged from top to bottom, the top cover and the base are connected through bolts; the bottom of the bolt is fixedly connected with the base; an anti-explosion cavity is formed between the top cover and the base; an annular anti-explosion notch nick which is broken under specific pressure is processed on the base; a sealing ring is arranged on the outer wall of the explosion-proof cavity; the sealing ring is bonded with the outer wall of the explosion-proof cavity through an adhesive; the sealing ring is prepared from the following components in parts by weight: 80 to 100 parts of nitrile rubber, 15 to 25 parts of allyltrimethoxysilane / N-(4-cyano-3-trifluoromethylphenyl) methacrylamide / isobornyl acrylate copolymer, 2 to 3 parts of sodium dithiodipropane sulfonate, 0.5 to 1 part of phosphorus pentoxide, 0.1 to 0.4 part of polyphosphoric acid, 3 to 6 parts of vulcanizing agent and 2 to 5 parts of anti-aging agent. And 20-30 parts of a filler. The high-sealing-performance lithium ion battery cap disclosed by the invention is sufficient in use safety, small in internal resistance and high in sealing performance.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a cap of a lithium ion battery with high sealing properties and a manufacturing method thereof. Background technique [0002] With the development of the economy and the continuous improvement of people's living standards, various mobile electronic devices, such as mobile phones, digital cameras, notebook computers, etc., have been greatly popularized in the society. These portable digital electronic products usually rely on lithium-ion batteries to work, thus creating a large demand for lithium-ion batteries. Lithium-ion battery is a new type of green and environmentally friendly energy storage battery. Because of its high energy density, long service life, high operating voltage, long cycle life, small self-discharge, no memory effect, and high environmental protection, it is more and more popular. favor. [0003] Among the many components of lithium-ion batteries, ...

Claims

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Application Information

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IPC IPC(8): H01M50/147H01M50/171
CPCH01M50/147H01M50/171Y02E60/10
Inventor 昝向明
Owner 安徽捷创科技有限公司