The WCB Lithium Battery Valve is a safety valve specifically designed for lithium-ion batteries. Its primary purpose is to release excess pressure or gas buildup that occurs inside the battery during extreme conditions such as overcharging, overheating, or internal short-circuiting. If this pressure is not relieved, it can cause the battery to swell, rupture, or even explode. The WCB valve acts as a fail-safe, automatically opening when the internal pressure exceeds a certain threshold, allowing gas to escape safely. Once the pressure normalizes, the valve closes again, ensuring the battery remains sealed and protected.