Explosion-proof valve used for top covers of secondary batteries, top cover assembly, secondary battery, and automobile

• Main Authors: XING CHENGYOU, WANG PENG, LI XIANG, CAI RULAI
• Format: Patent
• Language: Chinese; English
• Published: 21.08.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to an explosion-proof valve used for top covers of secondary batteries, a top cover assembly, a secondary battery, and an automobile. The explosion-proof valve comprises a flat base part and a protrusion part protruding outward relative to the flat base part; the protrusion part is provided with a transverse straight nick, and a branched nick connected with one end of the transverse straight nick; the angle between the transverse straight nick and the branched nick is not zero. The explosion-proof valve comprises the protrusion part protruding outward with relative to theflat base part, and the protrusion part is provided with the transverse straight nick, and the branched nick connected with the transverse straight nick, so that when the pressure in a housing is increased to be too high, stress concentration of gas is generated at the protrusion part, and tearing of the explosion-proof valve is caused at the transverse straight nick and the branched nick, gas inthe housing is released,