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2017 Chevrolt Bolt EV
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Discussion Starter · #1 ·
I think I have finally found a solution for winter snow/ice build up in the wheel wells...Uses 7Watts ..highest temp is 140 Degrees F

I'll also wrap it in aheat resistant waterproof tape

Sleeve Font Slope Office supplies Screenshot
 

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As an avid RVer I have some experience with these.
I have an exposed holding tank on the rear bathroom that uses these heating pads and they do work but the intent is to prevent freezing.
You might want to verify the claim of 140F before you get too far into it.
 
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Discussion Starter · #3 ·
Thinking this tape to wrap..

Automotive tire Tire Tread Synthetic rubber Camera accessory

As an avid RVer I have some experience with these.
I have an exposed holding tank on the rear bathroom that uses these heating pads and they do work but the intent is to prevent freezing.
You might want to verify the claim of 140F before you get too far into it.
Thanks Bob....a reviewer posted that 140 was the to temp he measured. Should really only need above 50 degrees to keep ice from building up.

Also thought I had seen another reviewer say they used 50watts at high temp..still within easy range what 12volt battery can handle.

Ordered 2 of those, tape and switch.
 

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Discussion Starter · #6 ·
Hillbilly approach
I'm curious to see your setup. Please show us how you did it with pics
Thanks
Oh I will..

And If I can find someone ..thinking a small Body shop then I'm also going to do what I wanted to do that last couple winters... attach heat pads to battery.

Less than 5amps !

Something like this ..

Font Line Parallel Technology Electronic device




Snow Automotive tire Motor vehicle Freezing Slope





So have the Body shop fabricate a encloser for it made of Aluminum..something like this..
Rectangle Font Output device Screenshot Electronic device



So the heatpad would adhere to the aluminum sheet ..protecting the heatpad for rock chips, also an extra a layer of insulation and will all also radiate heat from the pad .

My battery was 44.7 this morning at 22F ...terrible for range and charging..
 

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Discussion Starter · #8 ·
Yes, the Battery's steel case will act like a radiator encapsulating and warming the battery ..barrier between the outside temps.

Think your heated car seat heating your backside while using just 25watts..
 

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Not thinking that it is not a good idea, it might be, but the battery already has a thermal management system that is more directly heating the cell (no metal casing in between or in the way).
Do you plan to turn on your system while the car is parked for the night so the battery is warm when you use the car? or do you plan to activate this while driving?
 

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Discussion Starter · #10 ·
The bolts thermal heating is junk. At 22 degrees f the battery is just 44 degrees f.

While driving at those just those temps the battery does not warm more than 2 degrees.
 

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Discussion Starter · #11 ·
Not thinking that it is not a good idea, it might be, but the battery already has a thermal management system that is more directly heating the cell (no metal casing in between or in the way).
Do you plan to turn on your system while the car is parked for the night so the battery is warm when you use the car? or do you plan to activate this while driving?
So finch what is your concern? over heating?

We can moniter battery temps
Product Font Technology Gadget Machine


Plus higly unlikey going to raise temps too high anyway as then the Bolts thermal management would be cooling .

The Thermal management cares not where the heat or cold comes from ...all it is doing is REACTING to to whatever temps it is registering.
 

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My concerne is that it will not be very effective, think of all the mass you are trying to heat with only 25w worth of heat. If I understand correctly you will stick the heat pads on the battery metal shell then you will cover those with an other metallic shell? all this metal material around the pads will dissipate the so little heat so rapidly especially when driving because air will pass under the car stealing the heat just like a heatsink. It will be hard to retain the heat there. The energy that the thing will consume just to keep the battery warm will affect negatively the range and you are trying to achieve the opposite, add some range in cold weather. Also you will add an other layer under and it will lower your ground clearance.
 

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Discussion Starter · #13 · (Edited)
My concerne is that it will not be very effective, think of all the mass you are trying to heat with only 25w worth of heat. If I understand correctly you will stick the heat pads on the battery metal shell then you will cover those with an other metallic shell? all this metal material around the pads will dissipate the so little heat so rapidly especially when driving because air will pass under the car stealing the heat just like a heatsink. It will be hard to retain the heat there. The energy that the thing will consume just to keep the battery warm will affect negatively the range and you are trying to achieve the opposite, add some range in cold weather. Also you will add an other layer under and it will lower your ground clearance.
total watts will be higher 60 per mat ..2 of those ..120 watts..more than enough to prevent the cold from getting to battery ..and raising the temp ..

Look at the mass it is heating

48551



Every use these mats before? Peel it up on a 5 below zero Minnesota winter and your walk is warm and steaming and no ice or snow ..
 

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total watts will be higher 60 per mat ..2 of those ..120 watts..more than enough to prevent the cold from getting to battery ..and raising the temp ..

Every use these mats before? Peel it up on a 5 below zero Minnesota winter and your walk is warm and steaming and no ice or snow ..
ok 120w but it is still insignificant for all the mass that is there. It might be good enough for melting a thin layer of snow on the side walk but on a moving car I'm not so sure. the passing air will do its job just like a fan does its job on a heatsink. How many Watts does the stock battery heater pulls? Im sure at least 10 times more and the heat is touching directly the cells, way more effective. Again you won't get free energy by doing this cuz the energy you waist on the heat pads, you loose miles...

As for the heat pads in the wheel wells, the goal of this is kinda useful especially for me in Quebec because I remember last winter the snow/ice buildup in there was terrible.
 

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Discussion Starter · #16 ·
and as far as "WIND"

Not impacted
Right away that tells us inanimate objects, such as cars and trucks, are not impacted by the wind chill because we are not actually cooling those objects down to the "wind chill" temperature. Naturally, those same inanimate objects don't have "feeling" like we do. However, you can experience wind chill while riding inside your vehicle.
Does the wind chill effect a car or truck? | wqad.com
 

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and as far as "WIND"

Not impacted
Right away that tells us inanimate objects, such as cars and trucks, are not impacted by the wind chill because we are not actually cooling those objects down to the "wind chill" temperature. Naturally, those same inanimate objects don't have "feeling" like we do. However, you can experience wind chill while riding inside your vehicle.
Does the wind chill effect a car or truck? | wqad.com
I know an objet does not feel chill effect and that is not what I am talking about, but wind or rather air do take away the heat away from an objet emitting that said heat, like a fan on a heatsink, a fan on a radiator, a fan in the hvac system. etc I don't think this phenomena is debatable.
 

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Discussion Starter · #19 ·
Well for the wheel wells ened up with these ...oh yeah 150 watts and Upto 375 degrees will make short work of wheel well Ice dams..

Font Organism Audio equipment Personal protective equipment Screenshot




Liquid Fluid Font Material property Measuring instrument




With the high watts I wont be able to run them full time with my 1000 watt PTC heater... but thats ok , I just need to run them for a couple minutes at 350 degrees to melt off the built up ice/snow

plugs right into my dc/ac invertor ..have a remote in the car to turn on/off
 

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