GB/T 19751-2005

This standard specifies safety requirements for the design, construction, and testing of hybrid electric vehicles (HEVs) to protect occupants and first responders from electrical shock, battery hazards, and unintended vehicle movement. It applies to the type approval and production conformity of passenger cars and light-duty vehicles that combine an internal combustion engine with an electric propulsion system, operating in China. The standard covers high-voltage component isolation, energy storage system protection, and emergency response protocols for vehicles sold or used in the Chinese market.