Nissan Leaf BMS - Revision history

Tom91: Categories

2024-12-20T16:51:44Z

2024-10-24T10:35:02Z

Connectors

2024-10-23T06:29:15Z

← Older revision		Revision as of 06:29, 23 October 2024
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	The earlier version has only white input headers while the later version has ONE black HV header and a grey low voltage header. We call the first version the "white" BMS and the later version the "grey" BMS.		The earlier version has only white input headers while the later version has ONE black HV header and a grey low voltage header. We call the first version the "white" BMS and the later version the "grey" BMS.

			The BMS cannot limit anything, it only measures voltage and current and it will balance the cells 24/7 as long as it receives +12V on pin 5 (BAT) of the round connector, which is wired to pin 12 of the LB11 connector.
			The BMS will only communicate when there is 12V on either IGN (pin 4 round connector, pin 6 or 7 of LB11, for old/new BMS) or CHG IGN (Charging) which is located on pin 21 or 31 (old/new battery type), pin 5 of LB11.
	Treated as a black box the main differences are:		Treated as a black box the main differences are:
	* Interlock is between Pin 8 and Pin 21 on white BMS as opposed to Pin 8 and Pin 6 on grey BMS		* Interlock is between Pin 8 and Pin 21 on white BMS as opposed to Pin 8 and Pin 6 on grey BMS

2024-10-23T06:19:52Z

← Older revision		Revision as of 06:19, 23 October 2024
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	* Supposedly the current sensors GND is on Pin 7 but I found Pin 7 internally unconnected and left GND on Pin 15		* Supposedly the current sensors GND is on Pin 7 but I found Pin 7 internally unconnected and left GND on Pin 15
	So if you have a "grey" wiring loom but a white LBC you need to move Pin 6 over to Pin 21 and Pin 7 to Pin 6.		So if you have a "grey" wiring loom but a white LBC you need to move Pin 6 over to Pin 21 and Pin 7 to Pin 6.

			PDF for HV wiring;
			https://www.diyelectriccar.com/threads/re-using-complete-leaf-drive-system-w-vcm.151458/page-11?post_id=871121#post-871121

	To mitigate the missing temperature sensor you need to bridge the two input internally behind the input stage. Therefor remove R59. Then Find R62 and bridge it over to the adjacent channel 4. If you want you can use the resistor you just removed.		To mitigate the missing temperature sensor you need to bridge the two input internally behind the input stage. Therefor remove R59. Then Find R62 and bridge it over to the adjacent channel 4. If you want you can use the resistor you just removed.

2024-08-31T20:44:16Z

← Older revision		Revision as of 20:44, 31 August 2024
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	https://docs.google.com/spreadsheets/d/1EHa4R85BttuY4JZ-EnssH4YZddpsDVu6rUFm0P7ouwg/edit#gid=7		https://docs.google.com/spreadsheets/d/1EHa4R85BttuY4JZ-EnssH4YZddpsDVu6rUFm0P7ouwg/edit#gid=7

			Dalas repository of CAN
			https://github.com/dalathegreat/leaf_can_bus_messages

	=== Different Versions ===		=== Different Versions ===

2023-06-13T09:22:43Z

← Older revision		Revision as of 09:22, 13 June 2023
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	=== Extending Sensing Wires ===		=== Extending Sensing Wires ===
	People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much on a 40kWh pack as this can cause a variety of issues [https://openinverter.org/forum/viewtopic.php?t=2737]		People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much on a 40kWh pack as this can cause a variety of issues [https://openinverter.org/forum/viewtopic.php?t=2737]

			[[Category:OEM]] [[Category:Nissan]] [[Category:BMS]] [[Category:Battery]]

2022-12-01T14:55:03Z

Extending Sensing Wires

← Older revision		Revision as of 14:55, 1 December 2022
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	=== Extending Sensing Wires ===		=== Extending Sensing Wires ===
	People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much on a 40kWh pack as this can cause a variety of issues ~~with the 40kWh LeafBMS~~ [https://openinverter.org/forum/viewtopic.php?t=2737]		People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much on a 40kWh pack as this can cause a variety of issues [https://openinverter.org/forum/viewtopic.php?t=2737]

2022-12-01T14:53:06Z

Extending Sensing Wires

← Older revision		Revision as of 14:53, 1 December 2022
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	=== Extending Sensing Wires ===		=== Extending Sensing Wires ===
	People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much/on a 40kWh pack as this can cause a variety of issues with the 40kWh LeafBMS [https://openinverter.org/forum/viewtopic.php?t=2737]		People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much on a 40kWh pack as this can cause a variety of issues with the 40kWh LeafBMS [https://openinverter.org/forum/viewtopic.php?t=2737]

2022-12-01T14:52:52Z

Extending Sensing Wires

← Older revision		Revision as of 14:52, 1 December 2022
Line 455:		Line 455:

	=== Extending Sensing Wires ===		=== Extending Sensing Wires ===
	People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much/on a 40kWh pack as this can cause a variety of issues with the 40kWh LeafBMS [https://openinverter.org/forum/viewtopic.php?t=2737~~&start=25~~]		People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much/on a 40kWh pack as this can cause a variety of issues with the 40kWh LeafBMS [https://openinverter.org/forum/viewtopic.php?t=2737]

2022-12-01T14:52:32Z

← Older revision		Revision as of 14:52, 1 December 2022
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	It uses a daisy chain of MAX17823B for sensing cell voltages.		It uses a daisy chain of MAX17823B for sensing cell voltages.
	[[File:40kwh Nissan Leaf BMS.jpg\|thumb]]		[[File:40kwh Nissan Leaf BMS.jpg\|thumb]]

			=== Extending Sensing Wires ===
			People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much/on a 40kWh pack as this can cause a variety of issues with the 40kWh LeafBMS [https://openinverter.org/forum/viewtopic.php?t=2737&start=25]

← Older revision		Revision as of 16:51, 20 December 2024
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	=== Extending Sensing Wires ===		=== Extending Sensing Wires ===
	People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much on a 40kWh pack as this can cause a variety of issues [https://openinverter.org/forum/viewtopic.php?t=2737]		People have succesfully extended sensing wires on a 30kWh pack, beware of extending them too much on a 40kWh pack as this can cause a variety of issues [https://openinverter.org/forum/viewtopic.php?t=2737]
			[[Category:Nissan]] [[Category:BMS]] [[Category:Battery]]
	~~[[Category:OEM]]~~ [[Category:Nissan]] [[Category:BMS]] [[Category:Battery]]