Tesla Model 3 Battery - Revision history

Bratitude at 02:56, 16 October 2025

2025-10-16T02:56:04Z

← Older revision		Revision as of 02:56, 16 October 2025
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	ID 0x401 cell voltages		ID 0x401 cell voltages. each parallel group is labeled as a "brick"
	[[File:Tesla shunt.jpg\|thumb\|tesla shunt polarity]]		[[File:Tesla shunt.jpg\|thumb\|tesla shunt polarity]]
	ID 0x332 min/max		ID 0x332 min/max
Line 107:		Line 107:

	ID 0x352 soc		ID 0x352 soc

			* BMS_energy status
			** BMS_energySatusIndex:
			** BMS_nominalFullPackEnergy:
			** BMS_nominalEnergyRemaning:
			** BMS_idealEnergyRemaning:

	ID 0x20A contactor state		ID 0x20A contactor state

2025-10-11T18:54:20Z

← Older revision		Revision as of 18:54, 11 October 2025
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	https://www.evbmw.com/index.php/evbmw-webshop/tesla-boards/tesla-model-3-bms-batman		https://www.evbmw.com/index.php/evbmw-webshop/tesla-boards/tesla-model-3-bms-batman


			there are a few differnt types of modules used

			NCA

			- 60(?)kWh "short" modules. most of these packs contain 24s modules that are about 51in long. pack with known short modules are: 1104428-00-''R, 1137378-01-'', 1522118-*''-'', 1104428-00-P, 1104426-00-'', 1104428-0L-'', 1104426-00-P.


			-75kWh

			-90kWh

			LFP

			-60kWh

	[[File:Broken isospi.gif\|thumb\|broken isospi connector]]		[[File:Broken isospi.gif\|thumb\|broken isospi connector]]

2024-12-20T16:30:11Z

2023-02-24T19:12:30Z

reading canbus data

← Older revision		Revision as of 19:12, 24 February 2023
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	https://openinverter.org/forum/download/file.php?id=20709		https://openinverter.org/forum/download/file.php?id=20709


			apps:

			[https://www.scanmytesla.com/home scanmytesla]

			[https://www.teslax.app/ teslax] - load custom dbc files!

2023-02-24T03:38:28Z

← Older revision		Revision as of 03:38, 24 February 2023
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	ID 0x20A contactor state		ID 0x20A contactor state


			=== cell balancing ===
			its theorized (according to collin kidder)

			"The biggest things needed seem to be not being in drive (won't balance while you're driving), not heavily charging or discharging (seemingly less than 20A?), and detecting that the pack is out of balance. It seems this imbalance will need to be larger than 0.005V to trigger balancing. You might need to send messages that let it know it's currently "idling" and not "driving" but I think it will probably default to thinking it's not driving so no CAN traffic might be OK. Before balancing it will, however, check that it could enable the balancing resistors. So, my assumption would be that if you don't have all four modules hooked up it would find that it couldn't enable some balance resistors and then refuse to work.

			However, I don't have a full Model 3 pack to test with so this is all just the result of dark arts and guessing. And, of course, the firmware version of your pack might make a difference. However, the good news is that it sure looks to me like the BMS will automatically do balancing based on the pack being in a good state to do so and the modules being out of balance."
	[[Category:OEM]] [[Category:Tesla]] [[Category:Battery]]		[[Category:OEM]] [[Category:Tesla]] [[Category:Battery]]

2023-02-08T17:48:22Z

← Older revision		Revision as of 17:48, 8 February 2023
Line 75:		Line 75:

	ID 0x401 cell voltages		ID 0x401 cell voltages
			[[File:Tesla shunt.jpg\|thumb\|tesla shunt polarity]]
	ID 0x332 min/max		ID 0x332 min/max

	ID 0x3D2 total charge/discharge kwh		ID 0x3D2 total charge/discharge kwh

2023-02-08T04:43:55Z

reading canbus data

← Older revision		Revision as of 04:43, 8 February 2023
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	https://openinverter.org/forum/download/file.php?id=15866		https://openinverter.org/forum/download/file.php?id=15866

			or https://openinverter.org/forum/download/file.php?id=21585 (dose not require msgid6f2)

	libraries needed:		libraries needed:

2023-02-08T00:40:02Z

IDs

← Older revision		Revision as of 00:40, 8 February 2023
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	ID 0x401 is cell voltages~~. done via multiplexing (cp can)~~
			ID 0x401 cell voltages

	ID 0x332 min/max		ID 0x332 min/max

2023-02-08T00:39:45Z

IDs

← Older revision		Revision as of 00:39, 8 February 2023
Line 73:		Line 73:
	ID 0x401 is cell voltages. done via multiplexing (cp can)		ID 0x401 is cell voltages. done via multiplexing (cp can)

	ID 0x332 is min/max ~~(vehicle can)~~		ID 0x332 min/max

			ID 0x3D2 total charge/discharge kwh

			ID 0x132 battery amps/volts

			ID 0x352 soc

			ID 0x20A contactor state

	~~ID 0x3D2 is total charge/discharge kwh (both)~~
	[[Category:OEM]] [[Category:Tesla]] [[Category:Battery]]		[[Category:OEM]] [[Category:Tesla]] [[Category:Battery]]

2023-02-07T23:08:36Z

← Older revision		Revision as of 23:08, 7 February 2023
Line 65:		Line 65:


			=== IDs ===


			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)
	[[Category:OEM]] [[Category:Tesla]] [[Category:Battery]]		[[Category:OEM]] [[Category:Tesla]] [[Category:Battery]]

← Older revision		Revision as of 16:30, 20 December 2024
Line 101:		Line 101:

	However, I don't have a full Model 3 pack to test with so this is all just the result of dark arts and guessing. And, of course, the firmware version of your pack might make a difference. However, the good news is that it sure looks to me like the BMS will automatically do balancing based on the pack being in a good state to do so and the modules being out of balance."		However, I don't have a full Model 3 pack to test with so this is all just the result of dark arts and guessing. And, of course, the firmware version of your pack might make a difference. However, the good news is that it sure looks to me like the BMS will automatically do balancing based on the pack being in a good state to do so and the modules being out of balance."
	~~[[Category:OEM]]~~ [[Category:Tesla]] [[Category:Battery]]		[[Category:Tesla]] [[Category:Battery]]