A battery including a gas discharge mechanism that discharges when a gas pressure in a battery container reaches a predetermined value. The gas discharge mechanism includes a first gas discharge passage connected to an inner portion side of the battery con...

A secondary battery includes: an electrode assembly including a first electrode plate, a second electrode plate, and a separator; a case accommodating the electrode assembly, and including an open first side-surface and an open second side-surface that are...

A prismatic power storage device includes a case having a case body and a rectangular plate-shaped lid, an electrode body housed in the case, a positive terminal member extending out through a positive-electrode insert hole provided in the lid, and a negat...

Ignition and other accidents can be prevented with a high accuracy by reliably cutting off an electric current when the cell internal pressure increases, and the increase in the resistance due to permeation of an electrolyte can be limited. In order to acc...

A simplified, pressure-variation preventing tank structure capable of preventing pressure variations in a gas phase portion resulting from temperature variations, without bringing stored liquid into contact with air. This pressure-variation preventing stru...