[RE-wrenches] Goal of charge regulation FLA vs LiFePo

2020-05-29 Thread Mark Frye
Folks, A few questions: When charging a FLA battery, even though we use a three stage charging regime controlling voltage/current, is it not true that the real goal is to avoid excess temperature rise inside the cell generally? Do we worry that excess current will cause localized excess heati

Re: [RE-wrenches] Goal of charge regulation FLA vs LiFePo

2020-05-29 Thread Dave Angelini Offgrid Solar
The only time I worry about temperature in a FLA is during a corrective EQ as opposed to a preventative EQ. If the cells are really way off I just EQ at the recommended V for 5+ hours and then measure SG. I have no worries unless the temp is outside the max recommendation. At that point I would te

Re: [RE-wrenches] Goal of charge regulation FLA vs LiFePo

2020-05-29 Thread Jerry Shafer
Wrenches. Mark Any good Lithium ion phosphate tech battery has a BMU that protects the battery from over charge and over temp, different brands may have different ways and values, In most cases the inverter battery temp sensor is not used on a LFP batteries and the BMU will control both battery int