Secondary battery
AssigneePanasonic EV Energy Co., Ltd.
InventorsTakashi Asahina, Shinji Hamada, Toyohiko Eto
Life of this patent
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Abstract
A secondary battery comprises a power generating element, a battery case including a gas release hole, and a valve safety device configured to close the gas release hole and release gas out of the battery case when inner pressure in the battery case exceeds a predetermined value. The safety valve device comprises a valve member and a holding member. The valve member includes a sealing portion hermetically making contact with a sealed surface around the gas release hole, and the holding member is fixed to the battery case to elastically press the sealing portion by its elastic deformation.
Claims15
A secondary battery comprising:
- a power generating element;
- a battery case storing the power generating element and including a gas release hole;
- and
- a safety valve device configured to close the gas release hole and release gas out of the battery case through the gas release hole when inner pressure in the battery case exceeds a predetermined value,
- wherein the safety valve device comprises:
- a valve member closing the gas release hole;
- and
- a holding member holding the valve member on the battery case,
- the valve member includes a sealing portion separably making contact with a sealed surface located around the gas release hole of an outer surface of the battery case, and
- the holding member is fixed to the battery case and elastically presses the sealing portion by its elastic deformation.
Dependencies are inferred from the claim text.