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05-23-2007 02:52 PM  13 years ago
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gmebey

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Fort Collins, CO

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LiPo charging?
I’m just wondering what others do to reduce the risk of LiPo fires while charging. I have head about the LiPo Sac, the LiPo bunker and many other ways people charge their batteries.

I’m still torn between charging them in the house or outside since I’m a bit unsure of the safety devices that are provide actually preventing the spread of fire.

What are some of the opinions on safely charging LiPo batteries and has any had the experience of LiPo fire where their method did it’s job?

.
"Once you are in RC you are in for life. You may go away but it will draw you back." By an
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05-23-2007 03:15 PM  13 years ago
Wingman77

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Pulaski Tennessee

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what charger do you use? that can make a big difference.
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05-23-2007 03:28 PM  13 years ago
gmebey

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Fort Collins, CO

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I use several kinds!

Schultz 330
CellPro Balancing charger
Triton
E-Tec 2020

This question should be independent of the charger……I was looking for information of what to do with battery to maintain a safe environment.

You are not the first persion that has implied that the charger makes a difference. It may as long the battery is not the failure or the charger itself dose not have a failure. Here is a good example of the charger being the cause of the failure, which in turn could lead to over charging the LiPo….fire!

While plugging in the battery the user accidentally zaps the output jacks with a static discharge (ESD), and this caused the output control MOSFET to fail in the “ON” state. Now the charger is not able to turn off the output, and the user unaware of the issue walks away.

I know it sounds like a ling shot, but it isn’t. A MOSFET can be damages with an ESD pulse of less than 100V….you feel the ones in the 20k or higher range.

So back to the question what to do with the battery while charging?

.
"Once you are in RC you are in for life. You may go away but it will draw you back." By an
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05-23-2007 04:18 PM  13 years ago
helimatt

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Lafayette, IN

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You may not get much response because, except for those using the precautions you mention others may not take much special precaution and may not want to admit it.

So I will... I charge in my house, i put the lipo in the stainless bar sink (doesn't get used much) set the charge and WALK AWAY. In the outside chance that the charger mafunctions, I may have a fire in the sink, possibly smoke damage to the room.

I also do field recharging in my trunk off the car battery (2100mAh, 3 and 4S sized). I may even drive around with the lipo charging...

I think the risk is very very low. The house is full of electronics, I have cans of gasoline and solvents in the attached garage I am more worried about.

I suppose the first time one of my lipos unexpectedly goes up in flames I will change my practices, if that ever happens. For now, I am not worried.

Best to use a container or the sack, and if you are worried always be "attending" the charge process. Can't go wrong there.
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05-23-2007 04:30 PM  13 years ago
gmebey

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Fort Collins, CO

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I do agree that the probability of a charge failure leading to a LiPo fire is rather low, but (read on). I have been flying LiPo batteries for about 4 years and never had a failure that scared me. I have had packs wear out, two puff, but no fires.

My charging practices in the past have been rather lax, but I just recently had a battery fail to charge, and was warmer than normal. My thoughts were I was luck it was on a good charger that has an auditable alarm, and that I should take better precautions.

I have done some research on the LiPo Sac and Battery Bunker, and think they may work. So before investing in a $30 commercial product I thoughts I would see what others are doing and what from experience what works best.
"Once you are in RC you are in for life. You may go away but it will draw you back." By an
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05-23-2007 07:10 PM  13 years ago
airboss

rrElite Veteran

OC ,california

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dont
dont charge indoors,thats silly,only charge outside or garage,and place lipo in fire proof container,i use wifes old cookware it costs nothing and comes with a lid in many sizes.be safe not ignorant.
Urukay HPS3 KSE 700 HPS3
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05-24-2007 12:47 AM  13 years ago
stockracing

rrNovice

Bay Area, CA

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For the ones that charges inside a safe, sack or bunker, how do you manage to connect to the balancer. Charging leads are long but balance leads are kinda short.
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05-24-2007 01:55 AM  13 years ago
airboss

rrElite Veteran

OC ,california

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big enough
make sure you buy or borrow a container that fits both,cookware comes in many sizes.mines an old corningware dish with lid 16"-8"-4".
Urukay HPS3 KSE 700 HPS3
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