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Gas release from a battery cell

A battery cell and gas technology, applied in the direction of electrical components, secondary batteries, battery pack components, etc., can solve water sensitivity and other problems

Inactive Publication Date: 2012-04-11
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As battery technology has developed, batteries have become larger per unit of weight, but modern batteries are also sensitive to water

Method used

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  • Gas release from a battery cell
  • Gas release from a battery cell
  • Gas release from a battery cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] In the following description, like reference numerals denote like elements.

[0063] Although the invention has been described below in terms of a number of example embodiments, various changes may be made therein without departing from the spirit and scope of the invention as described in the appended claims.

[0064] figure 1 An isometric view of an example battery cell 100 according to one embodiment of the invention is shown. The battery unit includes a case 110 , an air hole 120 for releasing battery gas, and an attachment 130 . Accessory 130 may include a connector for connecting the battery unit to a host device, such as a portable device (eg, a mobile phone). Alternatively or in addition, accessory 130 may include a processor or chip configured to monitor battery cell usage and / or control operation of air vent 120 . Accessories can be attached to the case 110 .

[0065] figure 2 show figure 1 Schematic side view of a battery cell. figure 2 The details f...

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PUM

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Abstract

A lithium-ion or polymer-ion battery or generally a battery with electrolyte that is incompatible with water. The battery has a battery cell and a gas-tight casing around the battery cell. A vent is arranged in the casing and configured to allow exit of gases from the battery cell. The vent contains a body with a circumferential wall defining an external surface and a space within the body. The external surface provides a sealing surface configured for hermetic sealing the vent to the casing. The vent further contains a gas separation element for passing through gases from the battery cell and for substantially inhibiting electrolyte of the battery cell from passing through, configured to divide a given portion of the space defined by the circumferential wall into a first chamber and a second chamber. The vent also contains a water separation element within the second chamber, which water separation element further defines the second chamber and substantially prevents entry of water as liquid or humid air through the second chamber to the gas separation element. The vent is configured to enable release of gases from within the battery cell while preventing access of water into the battery cell.

Description

technical field [0001] The present invention generally relates to gas release from battery cells. The present invention relates particularly, but not exclusively, to releasing gas from batteries of portable devices. Background technique [0002] Batteries are required to store chemical energy for subsequent use in different portable devices such as mobile phones. As battery technology has developed, batteries have become larger per unit of weight, but modern batteries are also sensitive to water. For example, lithium-ion (Li-ion) batteries can burn violently if the interior of the battery comes into contact with water. Even traces of water can damage the properties of the battery, so fabrication should be performed in very dry air (eg 1.5% relative humidity). [0003] Lithium-ion battery manufacturing typically involves covering the contents of the cells in a case with metal walls. The use of lithium-ion batteries emits some gases (mainly hydrogen and carbon dioxide). S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/12H01M50/30H01M50/202H01M50/24
CPCY02E60/12H01M2/1094H01M10/0525H01M2/1022H01M10/0565Y10T29/49108Y10T29/4911Y02E60/10H01M50/24Y02P70/50H01M50/202
Inventor J·米斯塔卡利奥
Owner NOKIA CORP