SparkEVPilot
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Location: Manteca, California

Re: Hot Garage

Wed Jul 19, 2017 4:26 pm

SparkEVPilot wrote:
jeff3948 wrote:

To quote from the 2015 Spark EV owners manual, "Do not allow the vehicle to remain in temperature extremes for long periods without being driven or plugged in. It is recommended that the vehicle be plugged in when temperatures are below 32 deg. F and above 90 deg. F to maximize high voltage battery life". My point is that I found that the charging mode for a Spark EV must be [has to be] set to the IMMEDIATE mode for this to work. Other modes act like the car is disconnected until the timed set point to connect to the power is reached.

Note: Page 231 of The 2017 Chevy Bolt Owners Manual states, "Plug-In Charging - This section explains the process for charging the high voltage battery. Do not allow the vehicle to remain in temperature extremes for long periods without being driven or plugged in. It is recommended that the vehicle be plugged in when temperatures are below 0 °C (32 °F) and above 32 °C (90 °F) to maximize high voltage battery life." Sounds very familiar to me.

If you so choose, you can keep the battery fresher longer or shorten the battery's life more quickly - Your choice!

gpsman
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Re: Hot Garage

Wed Jul 19, 2017 11:02 pm

"Battery Conditioning" applies mainly to "high power loads".

Either high output (foot deeply on the go pedal, or perlonged uphill climb) or high regen (going down a steep hill, stopping quickly from highway speeds), or Level 3 DCFC.

Charging at Level 1 ( 1kw ) or Level 2 ( 6kw ) does not produce very much heat. The batteries will stay close to ambient. At 1kw to 6kw of charge rate, there will be only a few tens of watts of heat to dissipate.

SparkE
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Re: Hot Garage

Fri Jul 21, 2017 2:52 am

It's not the charging that is the heat problem in my case/example. The problem was the 104 degree heat - the ambient temperature. At my house. Three days ago. Hotter in the garage. I left my EV plugged in all day, and yes, it consumed power even though the battery was 'full' (and had been full since halfway through the night). The 'conditioning' was keeping the battery cooler than the 104+ air. Just like when I drove to Walnut Creek last month (temp 106) and the energy display showed that 4% of the energy used was for 'conditioning' (even though I didn't charge).

SparkEVPilot
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Re: Hot Garage

Fri Jul 21, 2017 3:17 am

SparkE wrote:It's not the charging that is the heat problem in my case/example. The problem was the 104 degree heat - the ambient temperature. At my house. Three days ago. Hotter in the garage. I left my EV plugged in all day, and yes, it consumed power even though the battery was 'full' (and had been full since halfway through the night). The 'conditioning' was keeping the battery cooler than the 104+ air. Just like when I drove to Walnut Creek last month (temp 106) and the energy display showed that 4% of the energy used was for 'conditioning' (even though I didn't charge).


This is exactly what I see with my 2015 Spark EV in hot weather. For some reason, my 2014 Spark EV has never shown any % for battery conditioning. Yet, when I plug it in at night, and after the battery is fully charged, if it is hot enough in my garage, power will be consumed to keep the battery cool. If my garage is cooler than 90 deg. F, no power will be consumed.

flamaest
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Re: Hot Garage

Fri Jul 21, 2017 11:12 pm

gpsman wrote:Think about EVERY PARKED BOLT IN THE SUN.


Exactly.

WetEV
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Re: Hot Garage

Sat Jul 22, 2017 2:33 pm

SparkEVPilot wrote:The problem was the 104 degree heat - the ambient temperature. At my house. Three days ago.


The difference between the Northwest and California.

I drove 160 miles in my Leaf yesterday in normal NW summer temperatures, and the battery never got over 30C/86F. The hottest I've ever seen the battery get in the three and a half years I've owned the car was 36C/96F.

If I buy a Bolt, I suspect I'll rarely if ever see battery conditioning power use for cooling.
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devbolt
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Re: Hot Garage

Sat Jul 22, 2017 4:28 pm

WetEV wrote:
SparkEVPilot wrote:The problem was the 104 degree heat - the ambient temperature. At my house. Three days ago.


The difference between the Northwest and California.

I drove 160 miles in my Leaf yesterday in normal NW summer temperatures, and the battery never got over 30C/86F. The hottest I've ever seen the battery get in the three and a half years I've owned the car was 36C/96F.

If I buy a Bolt, I suspect I'll rarely if ever see battery conditioning power use for cooling.


Even in 90+ degree weather down in SoCal, and doing DC Fast charging, I haven't seen the battery temp get above 32C. And I have yet to see any power drawn for battery conditioning while not plugged in...

Normally the Bolt lives in Northern California on the coast by San Francisco, but we decided to take a road trip down to SoCal and visit family.

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Re: Hot Garage

Sat Jul 22, 2017 5:25 pm

jeff3948 wrote:I'm having serious doubts about buying a Bolt now knowing that it has to be continually plugged in in temperatures over 90°F.


If you own the car and plan to keep the car for the long term...You live in the desert. Your doubts may be justified.

If you're leasing the car, drive more / worry less...If the battery gets cooked, it's GM's problem - not yours. At this point, it's anyone's guess as to how the Bolt's battery pack will withstand heat.

Google "Nissan lizard battery". It would be reasonable to assume GM has learned from Nissan's experience and engineered the battery to withstand desert heat. With that said, it's also reasonable to assume that the battery also has it's limits - which is why they are clearly stated in the owner's manual and warranty statement. It's stated for two reasons:

1.) Best practices for the long term health of the battery.
2.) Releasing GM from the liability of replacing the battery under warranty should it be determined that the cause of battery failure is abuse. Subjecting the battery to temperatures beyond what is stated in the owner's manual (and warranty statement) are examples of abuse.
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jeff3948
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Re: Hot Garage

Sun Jul 23, 2017 3:13 pm

Does anyone know if the Bolt uses the air conditioner (or some other method) to cool the battery cooling fluid when in extreme heat while plugged in? If that is the case than my worries would be over storing it in a hot garage while plugged in.

SparkE
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Location: SF Bay Area

Re: Hot Garage

Sun Jul 23, 2017 3:38 pm

jeff3948 wrote:Does anyone know if the Bolt uses the air conditioner (or some other method) to cool the battery cooling fluid when in extreme heat while plugged in? If that is the case than my worries would be over storing it in a hot garage while plugged in.


Yes, the Bolt will cool the battery if it gets 'too hot' while driving, or when it is plugged in for charging. (It *may* not cool if delayed charging is set and it isn't charging - somebody said something along those lines.)

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