density of stored energy from batteries innovative
For reference, the new batteries from NEC have capacity of 350 Wh / liter, corresponding to 140 Wh / kg , versus 150 Wh / liter ( 50 Wh / kg ) of nickel / cadmium and 40 Wh / kg of those lead-sulfuric acid. As you can see, we have obtained an improvement by a factor of about 3.5 on the energy density than lead-acid batteries. It is undoubtedly a significant step towards the possibility of having a storage system appropriate to the range of a vehicle. In any case, you should always keep in mind as a reference that:
energy density of gasoline
The energy density of petrol is placed around 12,400 Wh / kg , still far a factor of 33 than that of the new lithium batteries, having considered the differential d ' end-use efficiency ( 30% for the internal combustion engine and 80% for the batteries + electric motor ).
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