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Pressure equalizing device

A technology of balancing device and pressure, applied in the direction of balancing valve, valve device, exhaust plug device, etc., can solve problems such as functional failure, and achieve the effect of low cost

Active Publication Date: 2017-07-28
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, malfunctions can occur in battery cells, such as lithium-ion cells, in which case several liters of gas and smoke are released within a few seconds

Method used

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Examples

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Embodiment Construction

[0029] exist figure 1 A pressure equalization device 10 according to a first embodiment of the present invention is schematically shown for the space 101, 101' in the housing 100 for the battery pack 103 and said housing Pressure equalization between 100's of environments. exist figure 1 The pressure equalization device shown in has a cylindrical hollow body 20 with a first opening 21 capable of fluid connection with the spaces 101 , 101 ′, a second opening 21 capable of fluid connection with the environment of said housing 100 . Two openings 22 and a cover 23 . Arranged in the hollow body 20 is a piston 30 which, by means of a seal 40 or two sealing rings 41 , 42 , bears positively against the inner side of the hollow body 20 or its outer casing 23 . The piston 30 is supported in the hollow body 20 in such a way that it can be moved by the pressure difference between the space 101, 101' and the environment.

[0030] The first opening 21 is formed partly in the housing 23 ...

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Abstract

The invention relates to a pressure equalizing device for pressure equalization between a space inside a shell of a battery pack and the environment of the shell. The device is provided with a cylindrical hollow body and a piston, wherein the cylindrical hollow body comprises a first opening capable of fluid connection with the space, a second opening capable of fluid connection with the environment of the shell and an outer cover; the piston is arranged in the cylindrical hollow body in a shape matching manner, and can move in the cylindrical hollow body through a pressure difference between the space and the environment; the first opening and / or the second opening is at least partially configured in the outer cover of the cylindrical hollow body; the piston can be at least partially moved to a position above the first opening and / or the second opening at a direction transverse to the opening direction of the first opening and / or the second opening, and therefore a fluid can flow through the cylindrical hollow body between the space and the environment. In addition, the invention relates to a battery system provided with the pressure equalizing device.

Description

technical field [0001] The invention relates to a pressure balance device. Background technique [0002] Batteries are currently frequently used as electrical energy stores both in purely electrically driven vehicles and in hybrid vehicles with an internal combustion engine and an electric motor. In principle, the requirements here differ from those of accumulators for mobile phones or notebook computers. Particularly high demands are placed on such accumulators or corresponding vehicle battery systems with respect to available energy capabilities, discharge power, charging / discharging efficiency, service life and reliability. For this purpose, larger battery systems or housings for them are produced, which have a relatively large air-filled space, the so-called dead volume, in the housing. Currently manufactured battery systems have a dead volume of 10 to 60 l. [0003] The operating conditions of the battery system specify a temperature change course from -35°C to +50°C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/12H01M50/30H01M50/308
CPCH01M50/30H01M50/308H01M2220/20F16K3/24F16K3/316F16K17/18Y02E60/10H01M50/317
Inventor B.克里格
Owner ROBERT BOSCH GMBH
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