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I-miev winter package

Posted: Tue Nov 17, 2020 3:13 pm
by Tiborx8

I am preparing for the cold days, so here is my setup:

1. upgrading the driver seat heating: I added heating panel also to the backrest, and connected both heaters to a thermostat for better heat comfort (not on/off every 5 min. like the factory setting.
2. I also added seat heating to the passenger seat ( seat+backrest), also with thermostat control.
3. heated steering wheel: it works fine in our nissan leaf, and it is doable in the miev. I ordered the heating pad, will start the project as soon as it arrives.
4. legroom: I installed 12v infrared heating film (220w/nm) under the front carpets - with insulation. It turns on together with the seat heating and controlled with a thermostat.
5. upper body: I also installed 12v infrared heating film under the front door panels - they also turn on with the seat heating, also has a thermostat control.

Total energy consumption: 25A.

The bigger project: I bought a bmw cabin pre-heater (it works in the BMW X3 diesels and in BMW Minis and preheats the coolant till the engine warms up so the cabin heating starts immediately). It works from 12v but takes about 40A - I did not measure it yet. Originally it is CAN controlled, but it is quite easy to connect the heating elements to 12v directly. To make it more effective, I bought the heating valve from a Ford fiesta - it opens/closes the cabin radiator according to the engine temperature. It is practically a 12v solenoid valve which closes down two pipes and enables the flow of coolant to another two pipes when powered. I plan to use it to shorten the coolant line in case I use the BMW cabin heater, so the coolant does not travel to the car`s main heater - however, when the battery needs to be warmed, the factory heater gets priority together with the factory coolant lines. This way I aim to somewhat temperate the cabin during the drive. I may use it for some kind of pre-heating but for that I need to upgrade to a larger 12v battery (the BMWx3 has a 150Ah battery, but the BMW Mini only has 55Ah, if I am not mistaken). Currently there is a 40Ah battery in my little car...

All above projects are are quite cheap as I am using salvage parts or new parts mostly from Aliexpress...:) the BMW pre-heater (used) was less than 10 USD, including shippment... unbelievable.

Re: I-miev winter package

Posted: Thu Nov 19, 2020 10:29 am
by ed5000
Where are you putting the switches for all this? You will have a very cozy car this winter. 8-)

Re: I-miev winter package

Posted: Thu Nov 19, 2020 2:24 pm
by Tiborx8
actually I plan to use only a few switches:

1. factory seat heating switch for the driver seat will also turn on: the steering wheel heating, the legroom heating on the driver`s side, the infrared heating in both doors.
2. the passenger seat heating switch (under the center console) also turns on: the legroom heating on the passenger side, the two infrared heating in both doors.

The thermostats are/will be hidden - I set the temperature and they remain like that until further notice.:)

There will be only one more switch for the cabin heating with the coolant pre-heater, but that I haven`t decided yet.

I like the simple dashboard solutions of the car, would not like to have 54 switches and thermostats everywhere...