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US 2019/0334146 A1Published application
Protection device for battery, battery, battery pack, and vehicle
AssigneeBYD Company Limited
InventorsQing LAI, Zhiwei TONG, Yan ZHU, Jianhua ZHU
Life of this patent
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Abstract
A protection device includes a casing assembly, a sealing film, and a temperature-sensitive actuating piece. A receiving chamber for receiving an inert gas is defined in the casing assembly. One end of the receiving chamber is provided with an opening. The sealing film is disposed at the opening to seal the receiving chamber. The actuating piece is disposed in the receiving chamber, and the actuating piece is provided with a piercing protrusion. When the actuating piece is deformed, the piercing protrusion pierces the sealing film.
Claims18
A protection device for a battery, comprising:
- a casing assembly, wherein a receiving chamber for receiving inert gas is defined in the casing assembly, one end of the receiving chamber is provided with an opening;
- a sealing film, disposed at the opening to seal the receiving chamber;
- and
- a temperature-sensitive and deformable actuating piece, disposed in the receiving chamber and provided with a piercing protrusion, wherein
- when the actuating piece is deformed in response to a temperature change of the battery, the piercing protrusion is driven to pierce the sealing film.
2 more elements
Dependencies are inferred from the claim text.