Installing 2 new 300AH Chins clones - Dropped a wrench and ZAP. Any chance to recover?

[liamlunchtray]

I got a quick shower of sparks and now I'm not seeing any voltage from either battery. Is there any chance that there is a resettable breaker inside these things? Luckily nothing else was connected yet - I was just tying the 2 batteries together. I know the battery cases are like sealed - Is there anything that can be done? They're brand new but I'm not so sure I would be able to get a replacement from the vendor for something this stupid. UGH.

 

[400bird]

Some of the BMS'S need charging voltage applied to wake them back up after a fault (like an overcurrent fault)

If that doesn't wake them up and the vendor isn't helpful, you could cut the case open, find the damage (probably the BMS) and repair/replace as needed

Got any pics of the carnage?

 

[liamlunchtray]

Not much in the way of carnage - A melted spot on the terminal bolt and my wrench and thats about it. I was totally stupid for using a wrench with a metal handle.It's dark out now (It's in an RV) but I will try applying some charging current tomorrow and see how it goes.

 

[crossy]

Yeah, certainly try a conventional (non-smart) charger or power supply to see if the beasts will awaken.

Then get sone nice big heatshrink to put on your tools!

 

[liamlunchtray]

Yeah, certainly try a conventional (non-smart) charger or power supply to see if the beasts will awaken.

Then get sone nice big heatshrink to put on your tools!

The charger in my rig is a Victron Multiplus 12/3000 - I assume that would be too "smart" for this purpose? Would a cheapie lead acid charger work ok? something like this guy https://www.harborfreight.com/autom...ntrolled-automatic-battery-charger-57015.html

 

[corn18]

The goal to wake up a BMS is to apply a voltage higher than the sum of the cells. So you need something that can do 13.6V or higher. I use the cheapo bench power supply if the battery is out of the camper or I use the solar if it is installed and the sun is out. My Multiplus II won't apply a charge to my battery if it is in protect mode.

 

[crossy]

The charger in my rig is a Victron Multiplus 12/3000 - I assume that would be too "smart" for this purpose? Would a cheapie lead acid charger work ok? something like this guy https://www.harborfreight.com/autom...ntrolled-automatic-battery-charger-57015.html

Yeah, the cheapest of the cheap lead-acid charger is the tool for this job. Just apply long enough to wake the BMS.

Any DC power supply of about 15V should do the trick.

 

[liamlunchtray]

A quick bloop from a dumb jump pack and we are back up and running. Hooray!

 

[crossy]

A quick bloop from a dumb jump pack and we are back up and running. Hooray!

Result!!

Now have you ordered that heatshrink? You may not be so fortunate next time!

 

[BatteryNut]

Not much in the way of carnage - A melted spot on the terminal bolt and my wrench and thats about it. I was totally stupid for using a wrench with a metal handle.It's dark out now (It's in an RV) but I will try applying some charging current tomorrow and see how it goes.

You managed to melt a part of your wrench? Post a pic please.