Secondary Battery
AssigneeHitachi Vehicle Energy, Ltd.
InventorsYutaka SATO, Takuro Tsunaki, Ryuji Kohno, Takashi Sasaki
Life of this patent
Estimating the term…
Abstract
A secondary battery includes a gas release valve located at a battery container housing a power generating element, wherein: the gas release valve includes a valve disk caused to expand outward by internal pressure in the battery container; wherein a plurality of grooves are formed at the valve disk in order that a plurality of valve element pieces become fractured along the grooves when the valve disk expands due to the internal pressure; and a scatter-deterring portion is formed at the valve disk in order to prevent the fractured valve element pieces along the grooves from scattering away from the valve disk.
Claims10
A secondary battery comprising a gas release valve located at a battery container housing a power generating element, wherein:
- the gas release valve includes a valve disk caused to expand outward by internal pressure in the battery container;
- wherein
- a plurality of grooves are formed at the valve disk in order that a plurality of valve element pieces become fractured along the grooves when the valve disk expands due to the internal pressure;
- and
- a scatter-deterring portion is formed at the valve disk in order to prevent the fractured valve element pieces along the grooves from scattering away from the valve disk.
Dependencies are inferred from the claim text.