Charging Li-Ions batteries

garyhaupt wrote:
Reading up some on the topic and charging a bank seems to be an issue. Is anyone familiar with this application in the RV world? and or sail boats?

A bit of backstory...my S-I-L is planning to build a bank for his sailboat...to power his electric motor. He is offering to build me a bank for my RV and I have been 'encouraged' by one of our members, to do a bunch of research. So..doing that as well as asking here.

I don't think there is any issue with charging a lithium battery to a set voltage to match the required specification.

The real issue is the BMS to balance the cells, limit charging current, limit discharge current, limit high and low voltage, etc. All of which changes based on temperature.

I think most RVers use drop in batteries although a few roll their own.

Are you building a battery from individual cells and connecting your own BMS/controller?

I'm looking forward to seeing what Gary and his SIL are planning to do.

Are you interested in charging 'lithium-ion' batteries (ie 18650 cylindrical cells, lithium polymer cells or laptop/cellphone batteries) or are you interested in charging LiFePO4 batteries (what most folks are using to power their RVs)?

While they both have lithium in their name, they are different chemistries and have very different charging and use requirements.

garyhaupt wrote:

Thanks...can you tell me what kind of charging system you have? I am reading about them and there seems to be quite a bit of concern...

https://community.particle.io/t/how-to-get-a-li-ion-battery-to-charge-faster/10178/3?fbclid=IwAR30RHR8Kb1lF-ff8jyIWBylQQUlypYasPgUzbPWBDl3NeZOugtvpjS5cFU


Gary

Your link appears to be talking about very small batteries, not what we use in RVs.

Solar, Outback controller. 2 Schauer chargers in parallel, modified to charge Li. In case you don't know, I have a 48v 100ah Li pack.

Li's will take a monster charge and don't need absorbtion. The only caveat I'm aware of is the BMS will not allow charging if the batteries are too cold.

2oldman wrote:
Mine charge just fine.

Lithium in subject posts

Thanks...can you tell me what kind of charging system you have? I am reading about them and there seems to be quite a bit of concern...

https://community.particle.io/t/how-to-get-a-li-ion-battery-to-charge-faster/10178/3?fbclid=IwAR30RHR8Kb1lF-ff8jyIWBylQQUlypYasPgUzbPWBDl3NeZOugtvpjS5cFU


Gary

Mine charge just fine.

Lithium in subject posts