yes, i have already done so, but didnt post the damn pic lol.

edit: oh ya you want the data lines not the voltage block signals. those are in CAN on this prius ecu, but will take out my gs 450h ecu and report back in a few!

this is my first test, driving out, voltage block 11 looks to be .2 volts lower at times then the rest, so i will charge up the battery by holding the pedals and then see what the difference is at the cell level, by removing the battery and taking off the top and bottom and if one cell is found very ...

amazing work! really this is one step closer to simulating the hybrid battery computer and thus achieaving the goals.

I have continue pursuing the other direction keeping the battery ecu and lying to it or modifying its firmware.

this is my 20ah(can do 100a , 150a for 5 second) 70 cell lipofe4 ...

my LiitoKala 20ah have arrived, now i will build maybe a 70s (5 cells per block) first, but may just shoot for the 84 pack with 6 cells per block.

this is 24s for my gokart that pulls 100a, exactly there rated max.

the ford fusion cells were my first experience with bolting cells together. heres ...

so i took my solar array and wired all 12 panels together and hooked them up, charged up the 288v cap that is part of the buck/ boost on top of the gs450h inverter.
it was 385v so i added another panel and reached: Screenshot_20250122_134448_Gallery[1].jpg

so 120 lifepo4 sells will make 420v at 3 ...

Great. I was about to say that I can test 88s li-ion battery in the next week but it is still only 360v. Nowhere close to your 420v. Great news. Do you have real time reading of this new battery stats from its BMS and therefore can tell us how car behaves with it?

Wait, I think I did not ...

18.5 is just a guess, but id be willing to disect and test a battery ecu, to find out its limit.


Screenshot_20250107_104746_Gallery[1].jpg

so 6 lifepo4 cells at 3.5v limited by the bms in to each voltage block starting at 21v and ending at 15v if cells taken down to 2.5v. likely only taken ...

Are you sure that car throws an error code when voltage is higher than 18,5v or is it just an assumption? If you're satisfied with Man in the middle behind BMS then apart from soc spoofing you would probably be able to filter error codes that come from BMS too. If not then spoof voltages sent to ...

I can confirm this part is reasonably doable. You will need complete harness, computers, and main accessories such as the brake booster with its stroke sensor.

On the gs450h, the brake stroke simulator is ran thru the skid ecu, is it the same on the prius? Did u bring the skid ecu over and not ...

ah ha! that is what i am missing so behind the 30kw dc dc it will have to be.


Hi, this may give some insight
operating a factory Gs450h, with 98 Lipo4, switched parallel to the Nimh 288v, judicially when voltages are acceptably matched.
The Boost converter limits the available power to 37kw.
This ...

50kw is just the desire. i guess the thought was if there was someway of running the toyota ecu without the buck converter. you have to by pass it for the zombie, but the zombie still talks to the regular firmware from toyota inside the hybird controller. so thats why i think by passing the dc dc to ...

So all you want to do is keep EV mode and replace the NMIH cells and corresponding monitoring circuit with Lithium cells and circuits to tell the Hybrid controller what to do?

Or are you proposing something else? As this will lock you into all the Lexus limits of the EV mode ect. Only difference ...

Abstract: The goal of this project is pretty clear, keeping the hybrid a hybrid, but swapping to bigger higher voltage batteries. 3 outcomes become possible:
1. upgrading existing toyota/lexus hybrids from NIMH to lithium and increasing the usage of the electric system for high MPG in mixed use mode ...