Patent ID: 11949119
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 6:
7. A secondary battery, comprising:
a case comprising an opening;
an electrode assembly received in the case; and
a cover assembly, the cover assembly covering the opening of the case, wherein the cover assembly comprises:
a cover plate comprising a gas vent;
a gas exhaust valve configured to seal the gas vent, wherein when a temperature inside of the case exceeds a melting point, the gas exhaust valve is configured to melt to a state of unsealing the gas vent, thereby allowing gas inside of the secondary battery to exhaust through the melted gas exhaust valve;
a protective part at least partially covering the gas vent and having a gas permeability coefficient smaller than a gas permeability coefficient of the gas exhaust valve to keep external moisture from entering the secondary battery, and to allow gas to exit the melted gas exhaust valve and the protective part,
wherein the cover assembly further comprising a pressing block, the pressing block is provided with a center hole opposite to the gas vent, a first protrusion is provided on a surface of the cover plate facing the gas exhaust valve, and the first protrusion presses against the gas exhaust valve;

wherein a second protrusion is provided on a surface of the pressing block facing the gas exhaust valve, the second protrusion presses against the gas exhaust valve, and the second protrusion is located at a side of a connection portion of the protective part facing away from the gas vent.