Strange things with quick charging

[Gencis]

What is the treshold value of max allowed battery temperature? I had longer journey and used fast chargers. Max temperature I got was 41,7 C (107 F). The cooling system turned off when car reached 71 percent of charge.

 

[kiev]

The temperature sensor measurement range is -30 to +85 C.

If the sensor detects > 60 C, then it causes the cooling fan to turn on and run for 10 minutes. This is considered an abnormal high temperature condition and will throw a DTC to the EV-ECU and a MIL to the dash.

During level 1 or 2 charging the pack fan is used to circulate air to keep temperature below the control limit.

During level 3 charging the AC system is added in to circulate chilled air and provide additional pack cooling.

Maybe with canion you can discover these temperature limit values.

 

[Gencis]

I made some notes during my travel. Distances between charging were 50-65 km. I was driving in the highway 70-85 km/h
Starting temp.: 23,8 C
After first charge: 27,1C
-
Before second charge: 28,5C
After second charge 34,8C
-
Before 3rd charge: 34C
After 3rd charge 39C
-
Before 4th charge: 38,3C
After 4th charge 41,7C
-
After 5th charge 41,1C

If I undestand soccectly that when battery temperature is bellow 39C, car AC system shuts down at 60 percent of charge.
Above shuts down at 71 percent

 

[rnlcarlov]

My AC system never shuts down during QC. It runs all the way to 90-95%, when the car charges no more on Chademo.
The highest temperature I observed on a single cell was around 47º, and a pack average of 38ºC. This was after multiple QC and highway speeds of 95-100km/h.
Since I made the trick to direct A/C to the battery during regular driving, this prevented temperatures from rising even more. If I set A/C to max I even get a significant temperature reduction between each QC.

 

[Gencis]

To: rnlcarlov
Your solution is very interesting.
Could you give some more information how you directed A/C system and how it works?

 

[Aerowhatt]

I don't use QCDC very much. Just don't need to in general. Recently I did use a different one than I had in the past. Same unit but a different location. The one I used to use occasionally has been out of order for 6-7 months (really). The old one would deliver 125amps this other one seems to be throttled back to about 12kW ~36 amps. Anyway pertinent to this thread at the lower charge rate the AC does not run at all even though battery cell temps are on par with previous summers. :roll:

Thinking there must be some charge rate cut off for incorporating the AC like PV1 has postulated.

Aerowhatt

 

[rnlcarlov]

Anyway pertinent to this thread at the lower charge rate the AC does not run at all even though battery cell temps are on par with previous summers. :roll:

Thinking there must be some charge rate cut off for incorporating the AC like PV1 has postulated.

Aerowhatt

Only on some cars, probably. If I start a charge at 80%, the charge rate is quite low, but if the battery is hot enough, the A/C comes on.