Tesla Model 3 Battery: Difference between revisions

Revision as of 23:08, 7 February 2023

hv controller connector

pinout from HV controller

model 3/y battery uses custom versions of the LTC6812 chips for voltage sensing dubed "batman"

bms boards talk via a modified version of isospi

Damien Maguire has developed 2 different unfished approaches to communicating directly with the cell level boards:

broken isospi connector

the HV controller located in the penthouse controls the PCS, contactors, pyro fuse, talks to the bms boards, etc

reading cell voltages and controlling contactors can be done by talking to the HV controller over CANbus

you can read cell temps and voltages with scanmytesla and hooking up a obd connector to the hv controller canbus

the HV matting connector is:

Sumitomo TS Sealed Series

useful links:

Arduino sketch for due based boards:

libraries needed:

make a s folder named "msgid6f2" in ardunio/libraries and put these two files there:

some of these ids are found on ether charge port (cp) can or vehicle can

ID 0x401 is cell voltages. done via multiplexing (cp can)

ID 0x332 is min/max (vehicle can)

ID 0x3D2 is total charge/discharge kwh (both)