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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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01-21-2020, 06:52 AM | #1 |
Gone Wild
Join Date: Oct 2012
Location: Southwestern Pa.
Posts: 6,204
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Keeping batteries warm --???
I use my cart for hunting in the northeast. It gets cold here at times and the cold really effects the batteries in a negative way.
My lithium pack is in a box that while not airtight, I may be able to keep it warmer than say.....the current temps of 12-degrees. So....my thoughts are "what if" I mounted a compact 12-V heater to the box? I found this heater https://www.amazon.com/Constant-Temp...a-524195392761 that may work. I would connect this up to my separate 12-V marine battery that I currently use for my winch's and lights. Any thoughts on this matter? |
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01-21-2020, 01:59 PM | #2 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Keeping batteries warm --???
Is your cart parked in someplace warm when not in use, or does it sit outside?
What I'm thinking is 150W might be enough to keep warm batteries warm, but not enough to warm up cold batteries. ---------- The heater will draw about 13A, you need your wench for safety reasons on the return trip and the 12V FLA battery is adversely effected by cold also and only has about 50% of rated capacity at 0°F. ----------- Do Lithium batteries outgas? If not, a more airtight enclosure could be built. |
01-21-2020, 02:06 PM | #3 | |
Gone Wild
Join Date: Oct 2012
Location: Southwestern Pa.
Posts: 6,204
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Re: Keeping batteries warm --???
Quote:
Maybe build a bon-fire in the bag well????? |
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01-21-2020, 04:18 PM | #4 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Keeping batteries warm --???
It is battery temperature rather than air temperature that determines the battery's performance and while not as heavy as lead-acid, Li batteries still have a considerable thermal mass and heat/cool slowly. If you have a way to measure battery temperature while in the heated garage before the trip and after the trip along with some spot checks during the trip, we'd have a better idea of how much heat loss occurs and there ought to be a way to calculate how many BTU's are needed to keep them warm.
Along the same vein as building a bonfire in the bag-well , it might be possible to mount a flame-less propane heater back there and use a fan to blow warm air into an air chamber the Li pack is in. Maybe even exhaust the warm air on the accessory battery. Perhaps a small propane fired boiler can be found and pump hot water to radiators in the battery boxes. |
01-21-2020, 04:24 PM | #5 |
Gone Wild
Join Date: Oct 2012
Location: Southwestern Pa.
Posts: 6,204
|
Re: Keeping batteries warm --???
You mean like this?? I do have a temp sensor in the center of the lithium pack. It's hooked into the BMS incase charging temps reach to high a number....then charging quits. I never tested it....really don't want to. But I can monitor temps before, during and after. |
01-21-2020, 05:16 PM | #6 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Keeping batteries warm --???
Overkill is underrated, but the steam boiler for a Stanley might be more of an overkill than needed.
Thinking more along the lines of a small tankless propane water for a RV. |
06-16-2021, 03:14 AM | #7 | |
Not Yet Wild
Join Date: Dec 2019
Posts: 3
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Re: Keeping batteries warm --???
Quote:
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06-16-2021, 03:37 AM | #8 |
Gone Wild
Join Date: Jul 2015
Location: Central South Carolina
Posts: 928
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Re: Keeping batteries warm --???
Clearly you folks need to move south ......
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