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I am trying to change out the NiMH battery in my 2002 RAV4 EV to lithium ion. The current configuration is 24 NiMH batteries that are not made anymore. With the BMS wires between every 12V cell, plus one at the beginning and an extra one for the other side of the cutoff plug. 26 BMS wires in total.

Data Sheet for the OG battery: http://www.evnut.com/rav_battery_data_sheet.html

I would like to convert the battery to Nissan Leaf Gen2 Battery. However the voltages do not match up perfectly as the Nissan Leaf batteries are 8V each. Any ideas on other battery options? Should I build a bunch of 3S 7P 18650 battery cells? Ivan looking to possibly have to change the charger unless I can find something to mimic the Lithium ion battery as a NiMH.

I've placed the Nissan Leaf batteries within the pack and found that I could fit 66 cells, but would need to run is as 48S with the Toyota orginal BMS wires between every 2 cells, 14V between every BMS wire.

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Z W
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    You should **edit** your question with additional details instead of adding them as comments. What is an OG battery? – JYelton Aug 23 '23 at 20:42
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    @JYelton Original gangster? – winny Aug 23 '23 at 21:08
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    Does the original BMS monitor every 8 V stack of batteries? If yes, this will be tricky as you would have to break out a signal from every other cell in your Leaf batteries. Perhaps someone has already solved it as EV conversions aren’t too rare these days. – winny Aug 23 '23 at 21:11
  • @JYelton JYelton OG: original battery, OEM – Z W Aug 25 '23 at 23:36
  • @winny The BMS is for every 12V cell, plus the 0V beginning, and additional BMS wire for the other side of the battery cutoff plug. 26 BMS voltage points. – Z W Aug 25 '23 at 23:38

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