Abstract: Addressing the current issue of electrical explosion protection design for battery rooms, this paper reviews relevant provisions in domestic and international standards and specifications, and analyzes the working characteristics of valve-regulated lead-acid batteries. Based on current standards and engineering cases, it calculates the time required for hydrogen gas released from valve-regulated lead-acid batteries to reach the explosion concentration limit under extreme conditions. Furthermore, it discusses the classification of explosion hazard zones in valve-regulated lead-acid battery rooms and provides relevant countermeasures.