Safety valve and manufacturing method thereof, sealed battery and manufacturing method thereof, vehicle, and battery mounting device
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United States of America Patent
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Apr 30, 2013
Grant Date -
Nov 3, 2011
app pub date -
May 26, 2009
filing date -
Jan 27, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A safety valve of the invention including a cleavable groove is provided in a battery case of a sealed battery containing a power generating element inside. The cleavable groove is partly formed with a measuring groove having a width wider than other portions. Even if other portions of the cleavable groove have fairly small groove width, a groove width of the cleavable groove can be obtained and determined the quality by measuring a groove width of the measuring groove. Thereby, a safety valve and a manufacturing method thereof, a sealed battery and a manufacturing method thereof, a vehicle, and a battery mounting device are provided to achieve less variation of valve opening pressure and stable product quality, as well as reliably assure the good quality.
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