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Anti-explosion nickel battery and anti-explosion ball and preparation method thereof

A technology of explosion-proof balls and nickel batteries, which is applied in the manufacture of nickel batteries, alkaline batteries, alkaline batteries, etc. It can solve the problems of explosion-proof balls that are too late to deflate, battery internal pressure rises, and battery explosions to prevent pressure explosions and thermal explosions. Effect

Active Publication Date: 2010-10-20
HUNAN GREPOOW NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature of the battery rises sharply, the highest temperature can reach 220 degrees, the internal pressure of the battery rises sharply, and the explosion-proof ball is too late to deflate, which may cause the battery to explode due to excessive pressure or cause a thermal explosion of the battery because the heat cannot be dissipated in time

Method used

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  • Anti-explosion nickel battery and anti-explosion ball and preparation method thereof
  • Anti-explosion nickel battery and anti-explosion ball and preparation method thereof
  • Anti-explosion nickel battery and anti-explosion ball and preparation method thereof

Examples

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Effect test

Embodiment 1

[0018] A method for manufacturing an explosion-proof ball for a cylindrical nickel-hydrogen battery. Firstly, EPDM rubber is weighed in proportion, and masticated at a temperature of 150°C. After adding carbon black and zinc dimethyl dithiocarbamate (PZ, the same below), the process of rolling, extrusion, vulcanization, molding and other processes is completed. Wherein the content of EPDM rubber is 86%, carbon black is 13.5%, PZ is 0.2%, sulfur (vulcanizing agent) is 0.3%, and the contents of the above components are percentages by weight. Match the prepared AA explosion-proof ball with cold-rolled carbon steel plate to make AA cap. Use the cap made by the present invention to compare the performance of the cap made without using the present invention.

Embodiment 2

[0020] A method for manufacturing an explosion-proof ball for a cylindrical nickel-hydrogen battery. Firstly, EPDM rubber is weighed in proportion, and masticated at a temperature of 180°C. After adding carbon black and PZ, kneading, calendering, extrusion, vulcanization, molding and other processes to complete the production. Wherein the content of EPDM rubber is 86%, carbon black is 13.5%, PZ is 0.2%, sulfur (vulcanizing agent) is 0.3%, and the contents of the above components are percentages by weight. Match the prepared AA explosion-proof ball with cold-rolled carbon steel plate to make AA cap. Use the cap made by the present invention to compare the performance of the cap made without using the present invention.

Embodiment 3

[0022] The invention discloses a manufacturing method of an explosion-proof ball for a cylindrical nickel-hydrogen battery. Firstly, EPDM rubber is weighed in proportion, and plasticized at a temperature of 200°C. After adding carbon black and PZ, kneading, calendering, extrusion, vulcanization, molding and other processes to complete the production. Wherein the content of EPDM rubber is 86%, carbon black is 13.5%, PZ is 0.2%, sulfur (vulcanizing agent) is 0.3%, and the contents of the above components are percentages by weight. Match the prepared AA explosion-proof ball with cold-rolled carbon steel plate to make AA cap.

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Abstract

The invention provides an anti-explosion nickel battery, an anti-explosion ball and a preparation method thereof. The anti-explosion battery comprises a battery body and a cover cap. A sealing ring is arranged in the battery body. The anti-explosion ball is arranged in the cover cap. The sealing ring is formed by molding polypropylene and assistant. EPDM is plasticated at 150 to 200 degrees centigrade, mixed with the assistant, calendered, extruded, vulcanized and molded to prepare the anti-explosion ball. According to the anti-explosion nickel battery, when the failure of the battery, as a short circuit, raises the interior temperature to 80 degrees centigrade, the pressure of the anti-explosion ball starts to decline or even loses efficacy, which is favorable for the discharge of gas generated by the short circuit, consequently the battery explosion caused by the overlarge interior pressure is prevented. If the temperature in the battery rises to 160 degrees centigrade, the sealing ring made of PP melts in time, which is favorable for the discharge of the generated gas and large quantities of heat, consequently the pressure explosion and heat explosion of the battery is prevented.

Description

technical field [0001] The invention relates to a nickel battery and a preparation method thereof, in particular to an explosion-proof nickel battery, an explosion-proof ball used therein and a preparation method thereof. Background technique [0002] Since the 1990s, the emergence of a large number of new and portable electronic products has not only promoted the development of the nickel battery industry, but also put forward higher requirements for the safety performance of nickel batteries, especially the explosion-proof performance. In order to improve the safety performance of the battery, a cap (also called a safety valve assembly) is usually provided on the battery case. The cover cap comprises an upper cover provided with an air vent, a bottom cover and an anti-explosion ball arranged between the two. When the battery has an accident such as a short circuit, the temperature of the battery rises sharply, the cap is activated, and the gas generated is discharged thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/30H01M2/08H01M2/12H01M10/28H01M50/184H01M50/193H01M50/30
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 刘淼贾红杰胡彦庆
Owner HUNAN GREPOOW NEW ENERGY CO LTD
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