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A leaf battery pack easily puts out 80kw. A NiMH battery the same voltage and same amp hours worth of cells would struggle to put out 80kw and would weigh about twice as much.
Oh and forget about quick charging. NiMH like to be charged slow.
Self discharge is high.
No one owns NiMH they have been around since the 1970s or 1980s.
The early hybrid cars used them.
Looks like the most important NiMH patent was owned by a now bankruptcy chevron subsidiary 20 years ago. The last significant NiMH patent expired around 2010.
It looks like when Toyota and honda started making their hybrids the price of nickel shot up from a few dollars a pound to nearly $30 per pound.
We don't use them because they are heavy, expensive, inefficient.
The only advantage I can think of is they have over lithium is NiMH are highly recyclable.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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