Safety valve and manufacturing method thereof, sealed battery and manufacturing method thereof, vehicle, and battery mounting device

摘要

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.