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Re: Batteries in the passenger compartment?
by Lee Hart
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Randy Eckert wrote:
> God I am glad some one has the time to tell about how they did it first.
> Thanks for all the good info. There is always time for great design!
Roland is a great source for very thorough robust design ideas. I'm not
quite as conservative as he is, but have built a number of successful
EVs. Here are some guidelines that I follow.
Lead acid batteries won't burn, so a "firewall" isn't exactly needed.
The purpose of a battery box is mainly:
- To keep them contained in case of a crash. Batteries are heavy,
and if they get loose and fly around in an accident, they can
inflict serious injury!
- To protect against electrical shocks. You don't leave the cover
off your home's electrical panel; likewise, you need to enclose
the batteries and their connections well enough so no one can
accidentally touch them (that includes kids, pets, mice, etc.)
- To keep them clean. Rain, snow, mud, dust, bugs, and the like
can create partial short circuits (leakage currents) that can
run down your batteries, prevent proper charging, or even create
shock hazards.
- To prevent accumulation of hydrogen. *All* batteries (flooded or
sealed) will vent hydrogen if overcharged. Floodeds of course
vent the most. A battery box needs to be ventilated to route
hydrogen outside (i.e. *not* let it collect in the interior of
the car)!
It isn't particularly difficult to meet these requirements. It's a lot
easier than safely containing (say) gasoline. The main things to avoid are:
- DON'T leave the battery terminals exposed, where anyone can touch
them.
- DON'T put them in a sealed space, like the trunk or inside the car
unless there is a fan or other source of ventilation.
- DON'T leave them loose to slide around in an accident. Mount them
well enough so if the car rolled in an accident, they would all
stay put!
- DON'T bury them so you can't get at them to test or replace.
--
Ring the bells that still can ring
Forget the perfect offering
There is a crack in everything
That's how the light gets in -- Leonard Cohen
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
> God I am glad some one has the time to tell about how they did it first.
> Thanks for all the good info. There is always time for great design!
Roland is a great source for very thorough robust design ideas. I'm not
quite as conservative as he is, but have built a number of successful
EVs. Here are some guidelines that I follow.
Lead acid batteries won't burn, so a "firewall" isn't exactly needed.
The purpose of a battery box is mainly:
- To keep them contained in case of a crash. Batteries are heavy,
and if they get loose and fly around in an accident, they can
inflict serious injury!
- To protect against electrical shocks. You don't leave the cover
off your home's electrical panel; likewise, you need to enclose
the batteries and their connections well enough so no one can
accidentally touch them (that includes kids, pets, mice, etc.)
- To keep them clean. Rain, snow, mud, dust, bugs, and the like
can create partial short circuits (leakage currents) that can
run down your batteries, prevent proper charging, or even create
shock hazards.
- To prevent accumulation of hydrogen. *All* batteries (flooded or
sealed) will vent hydrogen if overcharged. Floodeds of course
vent the most. A battery box needs to be ventilated to route
hydrogen outside (i.e. *not* let it collect in the interior of
the car)!
It isn't particularly difficult to meet these requirements. It's a lot
easier than safely containing (say) gasoline. The main things to avoid are:
- DON'T leave the battery terminals exposed, where anyone can touch
them.
- DON'T put them in a sealed space, like the trunk or inside the car
unless there is a fan or other source of ventilation.
- DON'T leave them loose to slide around in an accident. Mount them
well enough so if the car rolled in an accident, they would all
stay put!
- DON'T bury them so you can't get at them to test or replace.
--
Ring the bells that still can ring
Forget the perfect offering
There is a crack in everything
That's how the light gets in -- Leonard Cohen
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
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