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[S10-EV] 1997 S10 EV PbA -> 2004 EV Bones NiMH -> 2021 Lithium Conversion?
Hi all, *TLDR: I am seeking advice for getting lithium batteries into an S10 EV.* *Here is a collection of S10 EV resources I've collected (manuals, flyers,
etc.)*
https://drive.google.com/drive/folders/1tptiS5aXI0pcZ87QZGznfIPPXqHC641- My name is Billy and I live in Saratoga, CA. I own a few EVs including a
1994 US Electricar Geo Prizm and a 1999 Solectria Force. I picked up Gregg Bowman's 1997 S10 in Berkeley, CA this past summer. I'm a
big fan of the EV1 so this is sort of a dream come true. After getting a
new title, and doing my research I've come to the following thinking about
how to get the car back up and running while preserving its originality and
coolness: The car currently has NiMH batteries which were upgraded by EV Bones in the
early 2000s. Gregg drove it for a few years and after a trip away from home
for a few weeks, the car would no longer take a charge. It sat in the
carport for 10+ years. Today the Tech 2 reads 0 volts on every battery. 2 wall mount Magne Chargers were included. Both turn on when plugged in
when the paddle is removed. They are in great condition. I attached one to
a small dolly. I plan on attaching a J1772 inlet to the other. Clearly the truck will need new batteries to work. I'd like to go ahead
with a Lithium conversion while preserving the Magne Charge and original
BPCM for battery management and charging. *Original BPCM*
The original BMS was set up to track 26 batteries (either PbA @ 12v or NiMH
@ 13.2v) and the total voltage (either PbA @ 312 v or NiMh @ 343v). The PbA were rated at 48Ah and the NiMh were rated at 85Ah. There are two original charging profiles for the BPCM. It appears the PBA
profile is better for charging LiFePO4 cells since they do not dip in
voltage when nearing a full charge. See here <http://www.tzev.com/1998_s10e_BPCM_reverse_engineering.html> for
more on BPCM *New Batteries* Ideally all batteries can fit in the box. Does anyone have precise internal
dimensions? (or a CAD rendering)? I am willing to cut the box and install a
bed lift. For a lithium upgrade, it seems like there are two straightforward ways to
move forward: 1) 108 x CALB 3.2v cells = 345.6v We can fool the BMS into thinking groups of 4 CALB cells are a 13.2v
module. 60AH and 85Ah are small enough to fit in the box, but 100Ah looks tight. What would the max Amp Hour be here that we could install in the truck?
What is the max amp draw? The cells are rated at 2c. 2) 4 x BMW i3 Modules (See the full conversion here
<https://www.diyelectriccar.com/threads/chevrolet-s-10-ev-battery-upgrade-to-bmw-i3-modules.204290/>
) Does anyone have any advice or recommendations? Best,
Billy
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etc.)*
https://drive.google.com/drive/folders/1tptiS5aXI0pcZ87QZGznfIPPXqHC641- My name is Billy and I live in Saratoga, CA. I own a few EVs including a
1994 US Electricar Geo Prizm and a 1999 Solectria Force. I picked up Gregg Bowman's 1997 S10 in Berkeley, CA this past summer. I'm a
big fan of the EV1 so this is sort of a dream come true. After getting a
new title, and doing my research I've come to the following thinking about
how to get the car back up and running while preserving its originality and
coolness: The car currently has NiMH batteries which were upgraded by EV Bones in the
early 2000s. Gregg drove it for a few years and after a trip away from home
for a few weeks, the car would no longer take a charge. It sat in the
carport for 10+ years. Today the Tech 2 reads 0 volts on every battery. 2 wall mount Magne Chargers were included. Both turn on when plugged in
when the paddle is removed. They are in great condition. I attached one to
a small dolly. I plan on attaching a J1772 inlet to the other. Clearly the truck will need new batteries to work. I'd like to go ahead
with a Lithium conversion while preserving the Magne Charge and original
BPCM for battery management and charging. *Original BPCM*
The original BMS was set up to track 26 batteries (either PbA @ 12v or NiMH
@ 13.2v) and the total voltage (either PbA @ 312 v or NiMh @ 343v). The PbA were rated at 48Ah and the NiMh were rated at 85Ah. There are two original charging profiles for the BPCM. It appears the PBA
profile is better for charging LiFePO4 cells since they do not dip in
voltage when nearing a full charge. See here <http://www.tzev.com/1998_s10e_BPCM_reverse_engineering.html> for
more on BPCM *New Batteries* Ideally all batteries can fit in the box. Does anyone have precise internal
dimensions? (or a CAD rendering)? I am willing to cut the box and install a
bed lift. For a lithium upgrade, it seems like there are two straightforward ways to
move forward: 1) 108 x CALB 3.2v cells = 345.6v We can fool the BMS into thinking groups of 4 CALB cells are a 13.2v
module. 60AH and 85Ah are small enough to fit in the box, but 100Ah looks tight. What would the max Amp Hour be here that we could install in the truck?
What is the max amp draw? The cells are rated at 2c. 2) 4 x BMW i3 Modules (See the full conversion here
<https://www.diyelectriccar.com/threads/chevrolet-s-10-ev-battery-upgrade-to-bmw-i3-modules.204290/>
) Does anyone have any advice or recommendations? Best,
Billy
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