Toyota Rav4 EV Forum
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Winter range extender by heating coolant
http://www.myrav4ev.com/forum/viewtopic.php?f=9&t=2460
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Author:  chrisspy [ Tue Apr 21, 2020 2:46 pm ]
Post subject:  Winter range extender by heating coolant

1. plug into (timed?) 120V 15A. This means there's 2 plugs going into your car: 1 for charging, 2nd for this gizmo.
2. warm battery fluid
3. enjoy heat, full regen from start, full battery with longer range, improved battery lifespan

This upgrade has a long history of use. I'm shocked Tesla doesn't offer it as a cold weather option (not block heater).

Examples may be
https://phillipsandtemro.com/wp-content ... -kW-LR.pdf TSG 6012011000MC
https://www.etrailer.com/Vehicle-Heater ... 13100.html

What kind of improvement have others realized? Has anyone done this? Group buy for those who want to?

Author:  Weekdayskier [ Wed Apr 22, 2020 5:17 pm ]
Post subject:  Re: Winter range extender by heating coolant

I may be wrong, but Doesn’t pre-heating or cooling while plugged in do the same thing?

Author:  chrisspy [ Wed Apr 22, 2020 7:17 pm ]
Post subject:  Re: Winter range extender by heating coolant

Weekdayskier wrote:
I may be wrong, but Doesn’t pre-heating or cooling while plugged in do the same thing?

Yes.
It may be easier to find 120V when running errands & battery is cooling, not plugged in.
Look at Plugshare filter 120V only & ask when you're doing errands locally. Keeping the battery warm during winter would give summer time range & other benefits.
https://insideevs.com/news/408521/combu ... ge-sweden/

Author:  geo [ Tue Apr 28, 2020 4:56 pm ]
Post subject:  Re: Winter range extender by heating coolant

chrisspy wrote:
It may be easier to find 120V when running errands & battery is cooling, not plugged in.
Look at Plugshare filter 120V only & ask when you're doing errands locally. Keeping the battery warm during winter would give summer time range & other benefits.
https://insideevs.com/news/408521/combu ... ge-sweden/


Can't you just use the 120v EVSE that comes with the car to pre-heat?

Author:  chrisspy [ Tue Apr 28, 2020 6:46 pm ]
Post subject:  Re: Winter range extender by heating coolant

I thought 120V EVSE would only charge battery at slow rate, then have efficiency losses. I thought Level 2 6.6+kW was needed for preheat without using big battery.

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