Bern101 wrote:My battery don't have the cold weather package.
I can have a 2015 battery from a scap yard
This battery have the cold weather package (and I need it)
Can I install it in my 2011 Nissan Leaf ?
The battery modules you can remove from the 2015 battery (you will need to cut open the shell as it is glued shut) and remove the modules, then also open the 2011 shell (which is bolted, so much easier to open), remove the old modules and replace the 3 sub-packs with the new modules, but you *have to* also move the wiring from the old to the new modules so that you can use the old BMS (which is paired with the car).
The cold weather package (the white plastic covers on top of the modules) cannot work in your 2011 for 2 reasons:
- the car does not have the wiring and contactor to power the heaters
- the 2011 battery shell does not have the connector (or even the opening) to connect the heaters to.
In theory it is really simple to make the heaters work even without all the provisions in the car, when you are making changes in the battery box anyway, but it requires that you find some space for:
1) termerature sensor (thermostat type)
2) high voltage relay
Instead of connecting the heaters to the (absent) 3rd connector, you hook it up to the *output* of the main contactors (the back side of the large high voltage plug) and you insert the extra high voltage relay in one of these two extra wires. (NOTE that high voltage relays can be polarized, so you need to check in which wire / in which direction you best insert it and it needs to be connected on the "car" side of the contactors, not the battery side so the heater cannot run the battery flat when the car if off!)
The 12V power for the extra high voltage relay's coil is taken from one of the two main contactor relay coil power wires, one wire run through the thermostat so the extra relay coil can only receive power and close to power the heaters when the temperature is low enough to make the thermostat close.
Hope this helps,