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Can RJ45 Cat 6 cable wires be used to extend the BMS for a Nissan Leaf? [SOLVED]
Posted: Tue Oct 22, 2024 11:33 am
by maiks
Hello,
I'm working on the BMS for a Nissan Leaf and would like to know if Cat 6 cable wires can be used for this purpose
Re: Can RJ45 Cat 6 cable wires be used to extend the BMS for a Nissan Leaf?
Posted: Tue Oct 22, 2024 1:29 pm
by johu
The 40 kWh (and probably 62 kWh) BMS runs higher balancing currents than the 24 and 30 kWh BMS. So for the latter two Cat6 may work current wise, for the former two it will skew the voltage readings.
Also keep in mind the isolation between the individual wires is important because you are running rather high voltages. If the skinny isolation of Ethernet cable rubs through you'll have a fire hazard.
Re: Can RJ45 Cat 6 cable wires be used to extend the BMS for a Nissan Leaf?
Posted: Wed Oct 23, 2024 4:47 am
by maiks
I'm building a 62 kWh battery pack using CATL modules, each with a capacity of 180 Ah, a voltage of 14.8V, a weight of 11.9 kg, and configured in a 4S arrangement. I'm currently using a Nissan Leaf BMS, which I believe is rated for around 40 kWh; it has three temperature sensors, one black high-voltage header, and one grey low-voltage header. To read data from the BMS, I'm using Leaf Spy along with a Bluetooth OBD2 scanner. My plan is to separate the battery pack into two boxes: one with 8 modules in the front and another with 16 modules in the rear.
What have so far achieved
I've successfully connected the BMS to the OBD2 scanner, but Leaf Spy isn’t displaying any data. I suspect this is because l have not yet connected modules
As a newbie, I’ve done most of my research online, and I would greatly appreciate any guidance, suggestions, or advice on how to proceed. Thank you!