arnis
Posts: 903
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: Contantly cooling while charging and driving

Mon Jul 02, 2018 10:42 am

BrockWI wrote:At what approx temps should the cooling fan come on while charging on level 2? It was in the mid 90F here and I was driving a lot and charging a lot. I can hear and feel the coolant pump running and the radiator is warm, the top of the stack is too hot to touch, the laser thermometer has it at 130F with the coolant lines going to the radiator about about the same. Shouldn't that fan be running?

The pack temp was 110F via Leafspy.

Granted this is unusually warm for us, I know in winter I am lucky if it is 10F above ambient in the garage at 30F and the stack at 40F while charging.


Pump is activated when coolant is slightly above freezing.
Fan is activated when coolant is above 57*C (or 60*C).

Cheap (not special) over the counter electronics are fine up to 80*C. That means coolant can be 65-70*C, depending on thermal compound etc.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

GerryAZ
Gold Member
Posts: 1845
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Contantly cooling while charging and driving

Mon Jul 02, 2018 7:38 pm

BrockWI wrote:At what approx temps should the cooling fan come on while charging on level 2? It was in the mid 90F here and I was driving a lot and charging a lot. I can hear and feel the coolant pump running and the radiator is warm, the top of the stack is too hot to touch, the laser thermometer has it at 130F with the coolant lines going to the radiator about about the same. Shouldn't that fan be running?

The pack temp was 110F via Leafspy.

Granted this is unusually warm for us, I know in winter I am lucky if it is 10F above ambient in the garage at 30F and the stack at 40F while charging.



Your experience sounds normal. I have not looked at the service manual, but I measured 130 F with my Fluke infrared thermometer and confirmed (as best as possible) with a thermocouple thermometer without having the fan(s) turn on. The fan(s) will turn on if the coolant temperature gets high enough because I have heard them while charging, but I don't know the exact set point. Also, in my climate the discharge temperature of the cooling air from the fans can be 125 F or higher with the air conditioner on so I see no benefit to trying to run the fans for air flow over the battery.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

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