Chevy Bolt EV Forum banner

1221 - 1234 of 1234 Posts

·
Registered
Joined
·
1,343 Posts
Looks like I definitely didn't win the good battery pack lottery in my 2020. 187.85 Ah and estimated capacity of 60.11 kWh.

I ran it a few miles after hitting 1 bar and flashing battery symbol. Then charged it up to 100% and this is what I'm showing. I'm down from 194.83 Ah and 62.35 kWh just 2 1/2 months ago. I guess I should start regularly checking and keep track of the trend.
 

·
Moderator
Joined
·
1,619 Posts
Looks like I definitely didn't win the good battery pack lottery in my 2020. 187.85 Ah and estimated capacity of 60.11 kWh.

I ran it a few miles after hitting 1 bar and flashing battery symbol. Then charged it up to 100% and this is what I'm showing. I'm down from 194.83 Ah and 62.35 kWh just 2 1/2 months ago. I guess I should start regularly checking and keep track of the trend.
I seem to recall battery temps might also play a role. Anything above or below 70F may show lower figures? Track it and note battery temp as well when you take the readings.
 

·
Registered
Joined
·
1,343 Posts
I seem to recall battery temps might also play a role. Anything above or below 70F may show lower figures? Track it and note battery temp as well when you take the readings.
Overnight low was right around 70F and I checked it first thing this morning. So I can only expect it to get worse. Great. :(
 

·
Registered
Joined
·
351 Posts
Looks like I definitely didn't win the good battery pack lottery in my 2020. 187.85 Ah and estimated capacity of 60.11 kWh.

I ran it a few miles after hitting 1 bar and flashing battery symbol. Then charged it up to 100% and this is what I'm showing. I'm down from 194.83 Ah and 62.35 kWh just 2 1/2 months ago. I guess I should start regularly checking and keep track of the trend.
I read 169.74 Ah after 5000 miles 2020 winter.....201.46 Ah now with weather 75°F or better...but I can actually use 63.4 kWh and that is what infotainment system shows ( 97.74% true state of charge down to 2.46% ....but considering energy recovery while coast and regen I assume real number with losses from battery ....inverter and motor are around 59-60 kWh...
What other have posted this is all over the board depending on temperature and other things.
Another thing to note when you charge full 100% ... it is actually 97.43 on my scanner true state of charge.
Once you go down to limp mode it is still usable battery but BMS is not letting you deep down more.
It is tough to explain how Bolt BMS measures .
Keep tires at 40-42 psi and don't worry to much about it. If you follow my posts you will find that I actually on purpose put my Bolt to many extreme scenarios and I have not been disappointed so far.
Also Ah will fluctuate if you constantly charge to set % less than 70% .
I do Once every couple months 100% charge and drive all the way down to 3-5%... just so BMS can relearn. But even if you don't it will give you more energy than what infotainment system is telling you.
Easiest way to see if BMS is drifting away is to keep battery % after driving and recheck after you are about to drive again. But temperature is the biggest part on how much BMS is thinking is still left in the pack.
 

·
Registered
2019 Chevy Bolt LT, Cajun Red
Joined
·
575 Posts
have we discovered a PID for “Hybrid / EV battery Voltage Sensors Average”?
 

·
Registered
Joined
·
8,205 Posts
Any PID to know if battery conditioning is being done? Cooling, specifically.
If the AC is on, and the battery coolant pump is on, you will quickly see the battery coolant temperature drop, followed by the drop in module temperatures. The 50 rpm you see here is a default reading. When actually on, it runs 2-3K rpm.

!Cabin - AC - Measured W,AC Comp,(Signed(A)*256+B),0,6500,W,7E4
!Battery - Coolant Pump Speed,Batt Pump Speed,22435A,(A*25),0,6500,RPM,7E4
!Battery - Coolant Temp F,Batt Coolant,2241A4,((A-40)*9/5)+32,-40,180,F,7E4
*Battery - Module Temp - 1 F,Batt Mod 1,2240D7,((A-40)*9/5)+32,-40,150,F,7E7
*Battery - Module Temp - 2 F,Batt Mod 2,2240D9,((A-40)*9/5)+32,-40,150,F,7E7
*Battery - Module Temp - 3 F,Batt Mod 5,2240DB,((A-40)*9/5)+32,-40,150,F,7E7
*Battery - Module Temp - 4 F,Batt Mod 6,2240DD,((A-40)*9/5)+32,-40,150,F,7E7
*Battery - Module Temp - 5 F,Batt Mod 8,2240DF,((A-40)*9/5)+32,-40,150,F,7E7
*Battery - Module Temp - 6 F,Batt Mod 10,2240E1,((A-40)*9/5)+32,-40,150,F,7E7


Battery and Cabin screen.jpg
 

·
Registered
Joined
·
186 Posts
sorry to hear about your possible less than perfect battery MisterJJ since mine came from same dealer and same time frame I wonder about it. But have only had mine below half a couple of times and charge to 95% (one bar down). It pretty much lives on the charger and I'm at home most of the time. I do really enjoy driving it - it is too much fun so I'm sure I dont have the best efficiency but maybe I'm having the most fun on 4 wheels :)
 

·
Registered
Joined
·
1,343 Posts
Yesterday it was 99 F and I drove home, picked up wife, and drove to restaurant. In parking lot I noticed that I was getting -4 to -5 kW, so I thought that maybe it was doing conditioning for the first time. Sure enough, I saw 1% used for battery conditioning on the display so I fired up Torque. Bat Pump Speed was at 2250, Batt Avg was at 95.0 F and Batt Coolant was at 98.4 F and dropping. This worried me a bit because if it takes 4+ kW to condition the battery, that does not bode well for a trip to Vegas at 115 F.

Today it was 103 F when leaving work. Bat Avg was at 95.0 F but no conditioning. After about 10 minutes, the conditioning starts and I discover that the pump runs at 3150 when moving but 2250 when stopped. I suppose it's better to run the pump faster when forward motion contributes to the effectiveness of A/C system. But oddly, it wasn't pulling 4 kW of power this time. It was only at 1 or 2 kW at a stop. No idea why it would be so different.

The conditioning stopped when I got home and turned the car off. I had read that it allows the battery to get hotter before conditioning when not plugged in so I plugged in, expecting the conditioning to start up again but it did not. I have not seen it mentioned if the conditioning temperature used when driving is the same as the unplugged or the plugged-in temperature.

In other news, battery capacity is down to 186.37 Ah and 59.64 kWh. I suppose the higher temps could now be impacting these numbers.
 
1221 - 1234 of 1234 Posts
Top