Tesla 16v li-ion battery: Difference between revisions

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== Charging: ==
== Charging: ==
if the battery is in a lock out state and will not take a charger, the cover needs to be removed to charge the battery directly.  
If the battery is in a lock out state and will not take a charge, the cover needs to be removed to charge the battery directly.  


'''disconnect the cell taps from the bms''', and then connect a 16v power supply to the cell tabs on the bms board. The BMS will need its eeprom/firmware reset  
'''disconnect the cell taps from the bms''', and then connect a 16v power supply to the cell tabs on the bms board. The BMS will need its eeprom/firmware reset  

Revision as of 13:08, 22 January 2025

tesla moved from lead acid 12v batteries to a li-ion 16v battery year 2022-current for model 3 and Y. and the model S plaid

hackig thread: https://openinverter.org/forum/viewtopic.php?p=78964#p78964

info:

  • CATL prismatic Cells
  • 1p4s
  • 99 Wh
  • 4 lbs / 1.8 kg
  • 16v internally
  • LINBUS for vehicle coms on voltage, soh, crash events, etc
  • internal BMS: monitors temp, controls charge and discharge rates
  • part number 1598486-99-D


its theorized that the CATL cells are the following specs:

  • NMC
  • 6.9 Ah
  • 3.7 V nominal (4.2 V max charge voltage, 2.75 V minimum)
  • charging temperatures: from -10°C to +45°C
  • discharging temperatures: from -20°C to +60°
  • max charging: 10C
  • max peak discharging: 50C
  • cycle life: >2,000 cycles (80% of initial capacity at 3C rate)


the brains of the operation is the: mm9z1_638

part of the S12Z family of processors


The battery locks out in a crash event, and may even begin bleeding the cells to 0v for safety.

Connectors

tesla service manual info: https://service.tesla.com/docs/ModelX/ElectricalReference/prog-55/connector/x001/

housing:

EVL1-P2TJ-25WA

current pins:

85562302-01

signal/ linbus pin:

857111838-01

Charging:

If the battery is in a lock out state and will not take a charge, the cover needs to be removed to charge the battery directly.

disconnect the cell taps from the bms, and then connect a 16v power supply to the cell tabs on the bms board. The BMS will need its eeprom/firmware reset

Cover removal:

Removing the cover is required to recharge and re-flash:

remove the 4 bolts that hold cover to the the sealed connector

using a blow torch or heat gun along the edges of lid, this will soften the epoxy sealing the lid in place.

start prying with a flat head screw driver, while applying heat. the lid should release and now be free.

Software:

To reuses the battery, it needs to be reset by dumping the eeprom and re-flashing cleared firmware.

there are a few methods to go about this:

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