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Plastic shell lithium ion battery and its making method

A technology of lithium-ion batteries and plastic casings, which is applied in the manufacture of electrolyte batteries, secondary batteries, battery pack components, etc., can solve the problems of ion battery leakage, liquid leakage, unsatisfactory service life and safety performance, and achieve Enhance the sealing effect and ensure the effect of precision

Active Publication Date: 2008-09-17
CHENGDU ZHONGKE LAIFANG POWER SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the plastic itself, the thickness of the plastic case of the existing plastic case battery is more than 10mm to prevent battery leakage and liquid leakage. Therefore, in order to ensure its service life and safety performance, the existing plastic case battery only has a smaller volume large square battery
For the small-volume batteries of various portable appliances, especially cylindrical batteries, the use of plastic shells will cause air and liquid leakage of ion batteries, which cannot meet the service life and safety performance, so only metal shells can be used.

Method used

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  • Plastic shell lithium ion battery and its making method
  • Plastic shell lithium ion battery and its making method
  • Plastic shell lithium ion battery and its making method

Examples

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preparation example Construction

[0029] The preparation method of the plastic case battery case of the present invention comprises the following steps:

[0030] ① Prepare the battery core; prepare the metal isolation layer (8);

[0031] A corrosion-resistant layer (6) with full openings on the periphery, bottom and upper part is injection-molded from engineering plastics, and a through hole is provided at the bottom;

[0032] A protective layer (7) with full openings on the periphery, bottom and upper part is injection-molded from engineering plastic material, and a metal insert as a negative pole (9) is inlaid at the bottom;

[0033] An upper cover plate with a positive pole (2), a liquid injection hole (3) and a vacuum hole (4) is injection-molded from engineering plastics;

[0034] ② Put the battery core (10) into the corrosion-resistant layer (6), and the negative electrode tab (12) of the battery core passes through the through hole at the bottom of the corrosion-resistant layer (6);

[0035] ③ Wrap the ...

Embodiment 1

[0058] Embodiment 1 Preparation of plastic case battery of the present invention

[0059] Taking the national standard battery size of 18650 as an example, the specific preparation method of the plastic case battery of the present invention is as follows:

[0060] 1. Injection molded from ABS material into a cylindrical shell with a thickness of 1mm, full opening at the top, and a through hole with a diameter of 9-10mm at the bottom, and a nickel metal insert with a diameter of 9-10mm is embedded in the shell, and the nickel metal insert and the shell The bottom through hole is closely matched; the outer diameter is Ф18mm and the height is 62.5mm.

[0061] Injection molded from PP material into a cylindrical inner shell with a thickness of 0.5mm, an upper opening with a 0.5mm outer edge, and a 45mm diameter through hole at the bottom; the outer diameter is φ17mm or φ25mm, and the height is 62.5mm.

[0062] The upper cover plate with positive pole, liquid injection hole and va...

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Abstract

The invention relates to a new type plastic shell lithium-ion battery and the preparation method, the invention belongs to the filed of lithium-ion battery technology. The plastic shell battery provided by the invention comprises a battery core and a shell, wherein a positive pole and a negative pole are set on the plastic shell, the invention has the advantages that the shell comprises a corrosion-resistant layer which is the inner layer, a protective layer which is the outer layer and a metal isolation layer which is set between the corrosion-resistant layer and protective layer. The invention uses unique battery structure, thus enhancing sealing effect of the plastic shell, and providing a small size plastic shell battery which is safe, reliable, cheap and easy to get for the filed of the lithium-ion battery, the invention can replace the existing metal shell battery.

Description

technical field [0001] The invention relates to a novel plastic shell lithium ion battery and a preparation method thereof, belonging to the technical field of lithium ion batteries. technical background [0002] Due to its high energy density, long life, small size, and no pollution, lithium-ion batteries are widely used in electric vehicles, aerospace, communication equipment, and various portable appliances. They are the most ideal mobile power sources. Currently, there are three main types of lithium-ion batteries on the market: [0003] 1. Lithium-ion batteries with metal casings are mainly stainless steel casings and aluminum casings. Batteries with these two metal casings account for the vast majority of the lithium-ion battery market. The advantage of this lithium-ion battery with a metal casing is that the airtightness of the assembled battery is relatively reliable; the casing has a certain mechanical strength and can withstand appropriate mechanical shocks; and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/06H01M2/04H01M2/30H01M2/26H01M10/38H01M10/40H01M10/0525H01M10/058H01M50/121H01M50/124H01M50/145H01M50/183
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 邓正华潘中来陈勉忠汪沣熊俊威秦华陈国忠索继栓
Owner CHENGDU ZHONGKE LAIFANG POWER SCI & TECH CO LTD
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