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Battery explosion


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#16 Texas Deere and Horse OFFLINE  

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Posted August 28, 2016 - 09:17 PM

There is a short piece of solid wire that is mounted on the main disconnect, they say it's rated at 250 amps ???
All the battery power goes through that wire or fuse.


So Doug, is that a fussable link then? If it is, you have to replace it with the same amperage fussable lunk and not just a solid piece of wire.

#17 MH81 ONLINE  

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Posted August 28, 2016 - 09:26 PM

Glad you're ok, hope you find the trouble.
Years ago, I was experimenting with hydrogen o2 generation for increasing MPG in cars. The experiments were promising in miniature, but I had a spark at the wrong time and the container went off like a shotgun. I had to fix 4" hole in the ceiling in the kitchen and promise my wife I was done "effing around"
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#18 WHdbJD ONLINE  

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Posted August 29, 2016 - 06:14 AM

Thanks for all the replies and good advice, my friends!    I knew my first electric tractor would be a learning experience.

 

I'll check everything out and be super careful.



#19 Alc ONLINE  

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Posted August 29, 2016 - 07:34 AM

I wonder if this is what caused the explosion . Copied for this site

http://www.pacificpo...q/carfaq14.html

 

 

Recharging a wet lead-acid battery normally produces hydrogen and oxygen gasses. While spark retarding vent caps help prevent battery explosions, they occur when jumping, connecting or disconnecting charger or battery cables, and starting the engine. While not fatal, battery explosions cause thousands of eye and burn injuries each year.

When battery explosions occur when starting an engine, here is the usual sequence of events: One or more cells had a high concentration of hydrogen gas (above 4.1%) because the vent cap was clogged or a defective valve did not release the gas. The electrolyte levels fell below the top of the plates due to high under hood temperatures, overcharging, or poor maintenance. A low resistive bridge or "treeing" formed between the top of the plates such that when the current started to flow, it caused an arc or spark in one of the cells. That combination of events ignites the gas blows the battery case cover off and spatters electrolyte all over the engine compartment. The largest number of battery explosions while starting an engine occurs in hot climates.

When an explosion happens, thoroughly rinse the engine compartment with water, and then wash it with a solution of one-pound baking soda to one gallon of warm water to neutralize the residual battery acid. Then thoroughly rewash the engine compartment with water. Periodic preventive maintenance (please see Section 3), working on batteries in well-ventilated areas or using Valve Regulated Lead Acid (AGM or gel cell) type batteries can significantly reduce the possibility of battery explosions.

 


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#20 WHdbJD ONLINE  

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Posted August 29, 2016 - 08:02 AM

great article, thanks Alc !



#21 Billy M OFFLINE  

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Posted August 29, 2016 - 08:25 AM

I've seen it happen before.  A friend of mine was charging his Wheel Horse A-60 electric...with the seat down.  That's a no-no.  Always charge with your hood and seat up on your Elec-Traks.  The A-60 has it's batteries under the seat.  If enough gasses build up, an arc on a battery terminal or from a charger component can make things go BOOM. 

 

Between our scissor lifts at work and all of my electric toys at home, I've had plenty of batteries short internally and it has always just resulted in a bad battery.  I would lean towards this being gassing related.  I'm glad there were no injuries.

 

Billy


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#22 toppop52 OFFLINE  

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Posted August 29, 2016 - 10:48 AM

First thing I'd do is check for continuity where it doesn't belong, using a multi meter or a powered test light, with no batteries connected. Sounds like a dead short!


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#23 Billy M OFFLINE  

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Posted August 29, 2016 - 02:24 PM

I found the pics of the explosion I referred to.  Pretty nasty!

 

 

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#24 larrybl ONLINE  

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Posted August 29, 2016 - 03:01 PM

Had my issues with batteries at work, these had to be pried out of the cabinet.

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#25 WNYTractorTinkerer OFFLINE  

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Posted August 29, 2016 - 03:05 PM

My neighbor's blew so bad all that was left was the plates and some of the bottom..  Sounds just like a gun going off!..  

 

Scary as hell



#26 DH1 OFFLINE  

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Posted August 29, 2016 - 05:50 PM

So Doug, is that a fussable link then? If it is, you have to replace it with the same amperage fussable lunk and not just a solid piece of wire.

 

Yes fusible link that is part of the main disconnect switch assembly.


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#27 DH1 OFFLINE  

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Posted August 29, 2016 - 05:52 PM

Had my issues with batteries at work, these had to be pried out of the cabinet.

 

Those batteries look like there were either over charged or completely discharged and froze in the cold.



#28 CRFarnsworth ONLINE  

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Posted August 29, 2016 - 06:27 PM

I've seen it happen before.  A friend of mine was charging his Wheel Horse A-60 electric...with the seat down.  That's a no-no.  Always charge with your hood and seat up on your Elec-Traks.  The A-60 has it's batteries under the seat.  If enough gasses build up, an arc on a battery terminal or from a charger component can make things go BOOM. 

 

 

 

 

 

Looks as if I'll be charging my Elec-Trak with the hood and seat up.  Had not done it before but it makes good sense to do it that way from now on.

Thanks for the advice.   Rick


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#29 MH81 ONLINE  

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Posted August 30, 2016 - 08:26 PM

Had my issues with batteries at work, these had to be pried out of the cabinet.


UPS system?
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#30 larrybl ONLINE  

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Posted August 30, 2016 - 08:37 PM

UPS system?

Yep, 25 kva, downgraded to 10 kva. 10 vs. 25 batteries.


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