The fuel cell stack uses a solid polymer, as in the previous Mirai, but has been made smaller and has fewer cells (330 instead of 370). Its weight bas been brought down from 56 to 52 kg. As well as achieving savings in size and weight, it also sets a new record for specific power density at 5.4 kW/l (4.4 kW/l excluding end plates). Maximum power from the FC stack has consequently been increased from 155 DIN hp/114 kW to 174 DIN hp/128 kW. Cold weather performance has been improved with start-up now possible at temperatures from as low as -30˚C.
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