Main Traction Battery Upgrade i-MiEV

[AlcidesR]

Your task is simple: Make an exact copy of the LEV50/LEV50N battery cell in every dimension but with newer chemistry. This includes perfectly copying the terminal base plates and 8mm terminal studs. Make it a direct swap for the stock Yuasa cells with no other parts needed. Use a chemistry with little or no silicone so swelling will be reduced at EOL. Sell IR matched sets of 93 cells (5 spares). Confirm quality with high grade equipment to measure IR and include a report with every set. Crate them up and you will get orders. $3500 per set plus sea freight.

I'm so surprised that this hasn't already been done. Seems like there are tons of generic "Catl 94Ah" cells of various dimensions close to but not including 171/44/98. Make an exact copy and you will be off to the races! I have OE Yuasa cells to send you if you need a template.

that would be a cherry on top of the cake! i would order 90 cells (just in case) on the next day!
I'm still trying to find out to "fool" the CAN to make the bateries fit the spec!

 

[CeeJay09]

that would be a cherry on top of the cake! i would order 90 cells (just in case) on the next day!
I'm still trying to find out to "fool" the CAN to make the bateries fit the spec!

I ordered 8 of these SVolt cells and tested them recently. The test was between 4.1v-3.3v to measure the capacity in an imiev with no CAN bridge. the cells ranged from 68.5AH to 71AH at a constant 30A load. I am in discussion with the suppliers to have these cells fitted with lazer welded tabs that mimick the cell tabs on the imiev. I will upload the files for the 3d printing files for the spacings and any clamping methods I come up with for these cells. I hope that I can get someone to assist me with accessing the remaining capacity from 4.35v-2.75v once this is completed

 

[CeeJay09]

I ordered 8 of these SVolt cells and tested them recently. The test was between 4.1v-3.3v to measure the capacity in an imiev with no CAN bridge. the cells ranged from 68.5AH to 71AH at a constant 30A load. I am in discussion with the suppliers to have these cells fitted with lazer welded tabs that mimick the cell tabs on the imiev. I will upload the files for the 3d printing files for the spacings and any clamping methods I come up with for these cells. I hope that I can get someone to assist me with accessing the remaining capacity from 4.35v-2.75v once this is completed

I am in the process of testing the full voltage range capacity and will post those results once complete

 

[MickeyS70]

I hope that I can get someone to assist me with accessing the remaining capacity from 4.35v-2.75v once this is completed

There are several good reasons why EVs don’t use the full cell voltage, safety and cell longevity to name a few…