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Pressure compensation device for a housing of an electrochemical device

a technology of electrochemical devices and pressure compensation devices, which is applied in the direction of cell components, lighting and heating apparatus, heating types, etc., can solve the problems of large internal volume of closed containers, thin walls that cannot be completely hermetically sealed relative to external walls, etc., and achieve reliable bursting protection, simple construction, and reliable pressure compensation

Inactive Publication Date: 2013-02-07
ELRINGKLINGER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a pressure compensation device for an electrochemical device. This device ensures reliable pressure compensation and also protects the device from excess internal pressure. It uses a stable, porous membrane and a protective degassing element to achieve these goals. The spacing between the membrane and the degassing element can be adjusted to control the bursting pressure. The device also includes a sealing element and a protection element to prevent uncontrolled gas exchange and protect the membrane from damage. Overall, this device is simple to use and cost-effective.

Problems solved by technology

Closed containers with a large internal volume and a thin wall cannot be completely hermetically sealed relative to the external wall.

Method used

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  • Pressure compensation device for a housing of an electrochemical device
  • Pressure compensation device for a housing of an electrochemical device
  • Pressure compensation device for a housing of an electrochemical device

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Embodiment Construction

[0058]An electrochemical device, designated as a whole by 100 and shown schematically as a whole in FIGS. 1 to 7 and, in particular, in FIG. 6 comprises a closed housing 102, in the interior 104 of which a plurality of electrochemical cells 106 are arranged, which may be electrically connected, for example, in series or in parallel.

[0059]The housing 102 comprises a housing wall 108, with a, for example, substantially circular, recess 110, which is closed by a pressure compensation device designated as a whole by 112.

[0060]As can be seen in particular from the sectional views of FIGS. 2 and 3, the pressure compensation device 112 comprises a carrier element 114, with which the pressure compensation device 112 abuts in the assembled state on the housing wall 108; a membrane element 116, which rests on a membrane element seat 118 of the carrier element 114; a clamping element 120, which is connected to the carrier element 114 and abuts with a clamping region 122 on the side of the memb...

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Abstract

A pressure compensation device for compensating an internal pressure in a housing of an electrochemical device is provided, including at least one gas through-opening and at least one membrane element with a gas-permeable membrane, which is deformable depending on a change in the internal pressure and by which the gas through-opening is blocked, and a protective degassing element, which is configured and arranged in such a way that when a critical deformation of the membrane is reached, it damages the membrane in such a way that the membrane at least partially opens the gas through-opening for protective degassing of the housing. The pressure compensation device allows both reliable pressure compensation between the interior of the housing and the exterior of the housing of an electrochemical device during normal operation of the electrochemical device and also ensures reliable bursting protection in the event of excess internal pressure in the housing.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority from, and the benefit under 35 U.S.C. §119, of German Patent Application No. 10 2011 080 325.4, filed Aug. 3, 2011, which is incorporated herein by reference in its entirety and for all purposes.FIELD OF DISCLOSURE[0002]The present invention relates to a compensation device for compensating an internal pressure in a housing of an electrochemical device, the pressure compensation comprising at least one gas through-opening and at least one membrane element with a gas-permeable membrane, which is deformable depending on a change in the internal pressure and by which the gas through-opening is blocked.BACKGROUND OF THE INVENTION[0003]Closed containers with a large internal volume and a thin wall cannot be completely hermetically sealed relative to the external wall. In order to prevent the housing of the container bursting or bulging, a continuous air exchange with the environment is necessary. Nevertheless, t...

Claims

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Application Information

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IPC IPC(8): F24D19/08
CPCH01M2/1241F16K17/16H01M2/1264Y10T137/3084Y10T137/0396Y02E60/10H01M50/394H01M50/3425
Inventor HEIM, FRANKGROSHERT, JANSTRAU L, THOMAS
Owner ELRINGKLINGER AG
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