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Safety device for an accumulator cell

A safety device and storage battery technology, applied to secondary batteries, battery pack components, battery boxes/coats, etc., can solve problems such as damage, damage to battery packs or battery modules, damage to battery covers, etc., to achieve favorable structures and eliminate overloading , the effect of simple cost

Active Publication Date: 2014-07-09
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the prior art is that such elastic cell covers expand due to the resulting overpressure when the volume of the accumulator changes (for example gas generation as described above) compared to rigid metal cylinders
But this expansion occurs under uncontrolled pressure build-up, which is necessary to trigger the above-mentioned safety device, and may damage or destroy the battery cover, and thus damage or destroy the electric or subordinate battery pack or battery module.

Method used

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  • Safety device for an accumulator cell
  • Safety device for an accumulator cell
  • Safety device for an accumulator cell

Examples

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no. 1 example

[0031] According to the first exemplary embodiment, the support frame 125 is fastened to the battery cover 114 with a surface 141 facing the battery 110 , which surface 141 is referred to below for simplicity as the bottom surface. The bottom surface 141 is preferably glued to the battery cover 114 here. But it should also be pointed out that as long as the battery cover 114 can be avoided from being damaged when the safety device 120 is installed, other fixing methods are also suitable.

[0032] figure 2 shows the press figure 1 According to the device 100, the safety device 120 has been installed on the storage battery 110 in the initial position or in the locked position, the locking part 140 is arranged between the holders 132, 134 in said position, and is fixed by the protrusion 135 on the one hand, and on the other hand Holds in notch 133 on the one hand. In this starting position, the locking element 140 locks the first electrical contact 251 and the second electric...

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PUM

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Abstract

In the case of a safety device for an accumulator cell, which has an electrode assembly disposed in an elastic cell sheath and at least one electrical connector, a blocking element is provided which blocks at least a first electrical contact associated with the electrical connector with at least a second electrical contact in a releasable electrical connection, the blocking element being configured for the purpose of releasing the releasable electrical connection when the cell sheath expands as a result of a change in volume of the accumulator cell during operation. A separation of the second contact from the first contact is thereby made possible.

Description

technical field [0001] The invention relates to a safety device for an accumulator having an electrode assembly disposed in an elastic battery envelope and at least one electrical connection. Background technique [0002] A battery pack usually consists of a plurality of batteries of any type, such as NiCd, NiMh and Li-Ion, which are connected together in groups or modules, and are therefore also called battery packs or battery modules. Accumulators with Li-Ion cells are in particular widely used due to their characteristic high power and their particularly high internal energy. Li-Ion batteries (used, for example, in power tools) are usually designed as round batteries with a solid metal cylinder, which is closed by means of a cover, which forms the poles of the battery. Because when such a Li-Ion round battery is working, an overvoltage may be generated due to the gas generated by the electrochemical process inside the battery (eg, electrical overload), so the Li-Ion batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/34H01M10/0565H01M50/126H01M50/574
CPCH01M2/345H01M2/34H01M10/0565H01M2/0275Y02E60/10H01M50/578H01M50/126H01M50/574H01M10/4235H01M10/445H01M50/3425
Inventor W·马赛厄斯
Owner ROBERT BOSCH GMBH