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Safety device for a watertight accumulator

A technology of a safety device and a storage battery, applied in the field of safety devices

Active Publication Date: 2011-11-16
萨弗特公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, people try to prevent this runaway of the core which causes a violent reaction and causes the emission of electrolyte vapor which is harmful to the environment

Method used

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  • Safety device for a watertight accumulator
  • Safety device for a watertight accumulator

Examples

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Embodiment Construction

[0028] The invention is described below with preferred embodiments given by way of example.

[0029] The accompanying drawing shows, in longitudinal cross-section, a sealed accumulator of the lithium-ion type in the form of a cylinder, equipped with a safety device according to the invention. It should be understood that the present invention is applicable to any other type and form of sealed electrochemical cells.

[0030] The accumulator 1 comprises a container with a cylindrical wall 2 closed at one end by a base 3 and open at the other end 4 . A cover 5 is arranged on the open end. The cover supports current output terminals 6 and 7 . One of the current output terminals (positive terminal 6 in this example) is welded to the cover. The other current output terminal, in this example the negative terminal 7, passes through the cover. The other current output terminal may be fixed to the cover by any means such as screwing or crimping. The seal 8 electrically insulates th...

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Abstract

The invention relates to a safety device for a watertight electro-chemical accumulator (1), comprising a circuit breaker (13) which is actuated by an overpressure inside a container (2) of the accumulator, and a gas generator (20) which is activated when the temperature in the generator exceeds a predetermined threshold value. The safety device can be used for quickly interrupting the current flowthrough the accumulator in case of malfunction and before electrolyte vapours are generated.

Description

technical field [0001] The invention relates to a safety device for a sealed battery. Background technique [0002] A sealed battery or sealed electrochemical generator (the two terms are equivalent and the term battery will be used in the description of this application) per se is known to include an electrochemical bundle comprising Alternating positive and negative electrodes on either side of the separator; this electrochemical bundle constitutes the core of the battery. Each electrode consists of a metal current collector supporting an electrochemically active material on at least one face thereof. The electrodes are electrically connected to a current output device which ensures electrical continuity between the electrodes and an external application associated with the battery. The electrode bundle is arranged in a container closed in a sealed manner by a lid. [0003] The present invention relates to sealed batteries of any type, and in particular to batteries of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/00H01M10/34H01M10/42H01M50/583
CPCH01M2/34H01M2200/00H01M10/4235H01M2/1241Y02E60/12H01M10/34Y02E60/10H01M50/3425H01M50/583
Inventor G·里戈贝尔
Owner 萨弗特公司