Measurement of Hydrogen Gas Emission from Battery-Powered Passenger Cars and Light Trucks During Battery Charging(Cancelled Nov 2008) J1718_200811

DOI: https://doi.org/10.4271/J1718_200811

Issuing Committee: Hybrid - EV Committee

Publisher: SAE International

Pages: 12

Rationale:This Recommended Practice defines a procedure for measuring gaseous hydrogen emissions from the aqueous battery system of a battery-powered passenger car or light truck. The purpose of this procedure is to determine what concentrations of hydrogen gas an electric vehicle together with its charger will generate while being charged in a residential garage. Hydrogen is generated from lead-acid (Pb/A) batteries (usually VRLA) during charge. Today's use of Pb/A is limited to Neighborhood Electric Vehicles or special military vehicles. J1718 is not relevant to the new fleet of general purpose electric or hybrid electric vehicles that are being developed with advanced battery technology, which are sealed battery systems with a different chemistry that does not produce hydrogen on charge. Pb/A doesn't have sufficiently high energy density or specific energy to be competitive with today's advanced battery technologies that will be used in the new vehicles under development. Furthermore, procedures that address hydrogen safety in fuel cell vehicles are addressed elsewhere.