EXPLOSION-PROOF VALVE, BATTERY TOP COVER AND LITHIUM BATTERY

Disclosed are an explosion-proof valve, a battery top cover and a lithium battery. The explosion-proof valve specifically includes an explosion-proof valve cover (10) and an explosion-proof valve seat (30), the explosion-proof valve seat (30) being provided with a valve hole; the explosion-proof valve seat (30) includes a first inner ring part (31) and a first outer ring part (32), the explosion-proof valve cover (10) being connected to the first inner ring part (31) in a non-welded manner and sealing the valve hole, wherein the explosion-proof valve cover (10) deforms at a temperature higher than a preset temperature control threshold, and a crack or a gap is formed between the deformed explosion-proof valve cover (10) and the explosion-proof valve seat (30); therefore, high-temperature gas is discharged from the crack or the gap to avoid accidents caused by thermal runaway of the lithium battery; the explosion-proof valve seat (30) is welded to the battery top cover and other components, and the explosion-proof valve seat (30) is connected to the explosion-proof valve cover (10) in a non-welded manner, so that the influence of the welding temperature on the explosion-proof valve cover (10) may be reduced, it is ensured that the explosion-proof valve cover (10) has no phase change when the explosion-proof valve is welded to the battery top cover and other components, and the explosion-proof effect is ensured.