Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 25, 2007
Patent Application Number
10742931
Date Filed
December 23, 2003
Patent Primary Examiner
Patent abstract
The invention provides a battery including a power generating element container, a positive electrode mixture, and a hydrogen gas permeable sheet provided in an opening of the power generating element container, the hydrogen gas permeable sheet having a water repellence of 2 kPa or more and a He gas permeability at 30° C. in a range of 2×10−6 to 10000×10−6 (cm3 (STP) cm/sec·cm2·cmHg), wherein a distance between the positive electrode mixture and the hydrogen gas permeable sheet gradually decreases toward a side wall of the power generating element container.
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