Can you ever make a reasonable comparison? You compare a full EV...

Can you ever make a reasonable comparison? You compare a full EV battery bank to a mild hybrid which has much lower power requirements. How is that worth anything? Google NiMH VS Li. Read about NiMH memory problems. Read about WH capacity vs Weight and Volume. NiMH does have some real advantages like cost / WH Number of cycles lifetime. Li has a much higher charge range that they can be operated at. Can sustain much higher Charge and discharge currents with out damage. Something that is critical in both EVs and Hybrids. NiMH cost 5 to 10 times more to support the same peck charge and discharge currents at same voltage. It is about 25% to 30% cheaper per WH stored The array would be 6 to 12 times bigger in WH so it would last 6 to 12 times longer as well. Be care full when looking at battery capacity. Many NiMH will talk about their much higher AH per cell capacity, it is higher but to move a car or store brake energy it takes Peek Watts and Watt hours. So if you see cell AH make sure you multiply that times cell voltage to obtain WH, 1.7 for NiMH and 3.7 for Li.


I always thought you were a performance person. If you want a car that is very fast off line and can store the most energy from heavy braking go with Li. If you want a slow car both acceleration and top speed, that goes far then NiMH is the right one for you.

One more thing for you to think about. One wiring standard in the US is THHN. A 14 AWG wire rated at 15 amps 600 volts can supply the same amount of power as a 10 AWG rated at 30 amps 300 volts. The 14 AWG weighs 16LBS / 1000FT the 10 AWG Weighs 38 LBS / 1000 Ft. at Home depot the 14 AWG is $0.25 / Ft. the 10AWG is $0.51. To deliver the same power. The lower voltage system wire costs and weighs 2X more. Running voltages higher always has major impact on cost and weight. From the simple things like wire to more complex like motors, to the very complex like SS control. One exception is inside a device like a microprocessor lower voltages are used for higher speeds. Lower voltage lowers problems with stray capacitance

20 or 30 years ago there was a major push to up car voltage from 12volt. America and Japan wanted 36 Volt and EU wanted 48 volt. Both would have reduced weight and costs. I liked 48 volts. They gave up because they could not agree. Large boats and small planes have always used higher voltages. 24, 48 ,72 are all used.