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Bursting element and galvanic cell with bursting element

A technology of primary batteries and components, applied in the direction of electrical components, secondary batteries, battery components, etc.

Active Publication Date: 2014-11-12
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem with this rupture element is that the rupture element is produced in such a way that it ruptures under the desired internal pressure of the battery

Method used

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  • Bursting element and galvanic cell with bursting element
  • Bursting element and galvanic cell with bursting element
  • Bursting element and galvanic cell with bursting element

Examples

Experimental program
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Embodiment Construction

[0032] figure 1 An embodiment for a rupture element 1 configured as a rupture membrane is depicted in . The rupture element 1 comprises a substantially planar base body which is constructed in multiple layers. In this case, the rupture element 1 has a first layer 4 of a first metal and a second layer 5 of a second metal, wherein the first metal has a coefficient of linear expansion that is at least 5% greater than the second metal. The first layer 4 of the rupture element 1 can consist of aluminum, for example, and the second layer 5 of the rupture element 1 can consist of zinc. The first layer 4 and the second layer 5 of the rupture element 1 are connected to each other by a firm joint, preferably by means of cold welding.

[0033] figure 1 The rupture element 1 depicted in has a rupture point 6 . This breaking point is preferably embossed after the firmly bonded connection of the first layer 4 and the second layer 5 . The rupture behavior of the rupture element 1 is adv...

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PUM

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Abstract

A bursting element and a galvanic cell with the bursting element. The invention relates to a bursting element (1) for protecting a galvanic cell from injurious excess pressure (3) comprising an essentially flatly designed basic body, wherein the base body has a multilayer structure. A first layer (4) of the base body is made of a first metal and a second layer (5) of the base body is made of a second metal. Upon heating of the bursting element (1), the bursting element (1) bulges due to the different metals, so that the bursting element is biased when heated. The present invention further relates to a galvanic cell (2) with a pressure release opening (8) and the bursting element (1) according to the invention arranged in the pressure release opening (8).

Description

technical field [0001] The invention relates to a rupture element for protecting a galvanic cell against harmful overvoltages, comprising a substantially planar base body. [0002] Furthermore, the invention relates to a galvanic cell having a pressure relief opening and a rupture element inserted into the pressure relief opening. A primary cell within the meaning of the present invention is especially a battery cell, a battery cell or a fuel cell, particularly preferably a lithium-ion cell. Background technique [0003] Rupture elements comprising a substantially planar base body for protecting galvanic cells against harmful overvoltages are known in the prior art, in particular as rupture membranes or rupture discs. Such rupture elements act as pressure insurance and are used in particular in the case of battery cells, such as lithium-ion cells, to protect the battery cells against harmful overvoltages. In this case, the rupture element is a kind of breaking point in the...

Claims

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Application Information

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IPC IPC(8): H01M2/12
CPCH01M10/0525H01M50/3425Y02E60/10
Inventor M·科尔贝尔格
Owner ROBERT BOSCH GMBH
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