How To Charge Lithium Iron Phosphate Lithium
These cells have been made in 2009 and were matched on the factory before being shipped to Balqon. Finding properly matched cells at present can actually be somewhat difficult. Over the last 11 years issues appear to have gotten worse with LFP cell matching, not better.
I recently carried out an experiment on some take a look at bench CALB cells that paired a “balancing BMS” in opposition to a 3.65V parallel high balance to 0.00A on the power provide. A parallel prime balancing to three.65V & zero.00A really re-balanced the cells in just below three hours.
Any discussion about balancing the cells can be incomplete without discussing matching the cells for internal resistance and Ah capability. When I obtained these cells there was lower than a 0.32 Ah difference between the worst cell and the best cell.
I agree one hundred% with storage between forty% SOC and about 60% SOC, in a cool surroundings , and so do many cell producers. • If your charger may be programmed to deliver constant present and cost as much as 14.6V, there is no want for an absorb phase. As you'll be able to see in this picture with 15A of present flowing the Mastech and the Fluke are in close agreement but I still trust my Fluke much more than the voltage show on the power supply.
This is totally contradictory to everything they only mentioned above it. “Floating” at 13.8V or three.45VPC ends in the battery being held at slightly above the a hundred% SOC level. 3.40VPC or thirteen.6V for a 12V nominal pack could be extra applicable than holding 13.8V indefinitely. #1 The manufacturer desires to see LFP batteries saved at a resting voltage that represents 40% SOC they usually think about this the “finest voltage for storage” for “minimal growing older“.
While the Mastech line represents a great worth, our major work-horses in the store are the BK Precision Model 1900’s. The BK Precision 1900 is a 1-16V, 60A variable energy supply with dedicated voltage sensing leads. The voltage sense leads, to me, are really the driving issue as you get much more accurate voltage at the terminals without worrying about voltage drop by way of the cables & terminals. It is a really good piece of substances however they run near $600.00 every.