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GlennWest

LG Lithium Ion battery pk

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47 minutes ago, jcussen said:

While there was some battery fires on early Tesla's, over 300000 model 3's have been produced with no reports of a battery caused fire.

That's raises a question. How many car fires were started by standard car batteries?

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Ok, got more info on battery on Craig's list. It is a new battery supplied by Nissan. He is buying them form them. So this is a great deal.

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3 hours ago, GlennWest said:

Ok, got more info on battery on Craig's list. It is a new battery supplied by Nissan. He is buying them form them. So this is a great deal.

Yes it is.

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Thanks. Interesting. He stress one thing I hear conflicts about. Float charging. Charge to projected safe level and stop all charging. 

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I called BattleBorn about charging my batteries, they said bulk to 14.4 volts, no absorb time, then to float at 13.6. While on solar anyway, controller will stay in float mode and handle any loads on system until load increases enough for battery  voltage to fall to 13.2 or so, when bulk starts again. This may not apply to all lithiums though.

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Thing that concerns me about float means some charge going in. Say at night when little is going out of batteries, could this overcharge them? Overcharging hurts Lithium. I would set to bulk and then stop. Set upper stop voltage and lower start voltage. Bulk until reached. stanby until lower voltage is reached. 

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Actually when charger goes into float at 13.6 float voltage, my lithium batteries are still above that voltage. So no chance of overcharging. Not sure of other batteries, but BB has a built in BMS which protects them from overcharge anyway.  My regular start battery 3 stage charger will bulk, absorb, then to float voltage, which just maintains that voltage and puts no current into battery unless it falls below that set voltage.  

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So BMS prevents overcharging. Agree. What if BMS fails? Not saying it likely or ever will. I just like to have all bases covered. I intend to set mine at no float. Shut down. Think I will go with the REC bms. And also set to bulk and standby.

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Charger can fail too, and just keep on charging. My chargers both solar and Victron charger will charge to 14.4 volts, then go to float and stay at 13.6 until voltage drops below that. Of course you cannot overcharge a 14.4 volt battery with 13.6 volts, so I feel pretty safe. But do not know about your battery

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batteries I am looking at are 36v min. 50.4 max. No need for me to go past 48v. 

Edited by GlennWest

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1 hour ago, GlennWest said:

So BMS prevents overcharging. Agree. What if BMS fails? Not saying it likely or ever will. I just like to have all bases covered. I intend to set mine at no float. Shut down. Think I will go with the REC bms. And also set to bulk and standby.

Your bms is the last line of protection, your charging sources are the first line of protection and be set to stop charging or lower voltage which ever way you go.

If your battery bms fails it should shut your system down.

Edited by Itinerant1

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