New consulting relationship with GreenTecAuto begins
What actually goes wrong with the batteries????
A look at todays Hybrid and EV battery packs
Battery packs exposed
Keeping Warm In New England
Plugging into the SUN
Making a small solar concentrator
Building MIMA and the plug in adapters
Converting a telephone truck to electric
DIY dual pulse Capacitor Discharge Spotwelder
Chevy Bolt EV joins the family
Battery conditioning
Better look at the drive unit
Bottom cover
Drive unit
EV meetup
First test
free solar charging
Getting deeper into winter
Goodby to the batmobile
How it lookes
Huge amount of things need to be disconnected
Hypermiling the Bolt EV
Installing a trailer hitch on my Bolt
Keeping the batteries warm in winter
Last look at my car collection
Making the trailer lights work
Very different than a gas car
One complaint/ future modification?
Transmission leak?
Getting in shape while making electricity
Replacing gasoline with solar electric lawn equipment
What is Genesis One?
How to stop the aging process DIY
MIMA Install Day 2005 a Big Success!
Building a hybrid car grid charger
Tapping into the Wind
Expanding MIMA with the Distribution board ( users projects )

Keeping the batteries warm in winter

Keeping the batteries warm in winter
Cold night battery conditioning

Winter temps are finally here so it is time to learn a bit more
About how often the conditioning kicks in and how much power is consumed
To keep the batteries warm
Test was started with the pack that only needed 12 kWh
To get to the hilltop reserve point
A lower current warming cycle is applied after the main charge completed
The temp was in the 20 degree zone during the test.
My juiceBox pro40 evse has a nice datalogging
Mode where it shows what is happening
At about 6 hour intervals
The charging ran for about 30 minutes at a peak rate of ~ 2kw
I let the car sit in the plugged in condition and saw a second conditioning at another 6 hour interval
I expect
That under colder conditions both the interval and length of conditioning
Will get more aggressive
So 1/2 hour at 2kw is only 1kwh used each 6 hours
Not as bad as I had expected.