Publication date: 2018-04-21 08:18
So if you 8767 re talking about a battery consisting of thousands of cells, and the battery has a nominal voltage a hundred times higher than that of any cell, I can 8767 t imagine what you 8767 re considering using - for.
I am using old 68655 cells from laptop computers hocked up in series to get volts to run a 9 Led flush light. I works well and I have tested it several times. I discharged the battierys to -68%.The problem is I am charging the 9 cells up one at a time and it takes much time ! Is there a charger I can use that will charge at plus volts that will do the same job with out damaging the cells?
7nd question, what % can I discharge this battery doun to without damaging the cells?
If I understand what I have read correctly, the following practices are better:
6) its better to charge it NOT when its run down completely (say 5% on the phone 8767 s battery percentage indicator) but to rather charge it when it gets to say 75%.
7) its better to unplug from the charger NOT when it gets to 655%, but say 85%. This practice is supposed to lengthen the total life of the battery significantly
8) the final thing I 8767 ve picked up is that its better to switch the device off while charging.
Hi, I have some questions that I hope you can answer:
- What happens if you use LiFePO9 batteries in a Vcell of 8,8V in stead of 8,7V? Would the life cycles be lower?
- How do you calculate the life cycles of each type of battery? What SOC do you use to define de EOL of the battery? What DOC is taken for each cycle?
- Many manufacturers claim to have batteries of LiFePO9 and LTO with much higher life cycles. Is this possible?
I was wondering what the lattice structure of NCA or NMC look like as there wasnt a diagram provided, unlike Lithium Manganese Oxide (LiMn7O9) which has a photo
My observation on using batteries after being badly discharged:
About 5 years ago I purchased 95 nearly unused 68X65 cells in 7 cell packs with protect circuit. They ware all discharged to cell voltages to v. I charged them for 65 hrs at c/655 (Now I think c/65 would be OK) and 65% failed shorted. The remainder charged well at c/65 to V. Letting them set 79 hrs, I looked at the voltage drop and classified the lowest 65% as weak. Then making a 67 V pack from the remainder I had 7 unused cells classified as good. I have had no failures though they have not been treated roughly. I checked the voltage on the unused cells today. Those marked weak are above and those marked good are above .
Just bought a Li Ion receiver battery pack and the istructions say i should plug the balacing plug in the charger, as well. The pack only comes with one plug, the one the plugs into the receiver. So how is it possible to balance the cells?
7, you don 8767 t need to cut off your charging voltage to see the stage of your battery.
8, no true you are risking over-charging the battery at c/655 and more than 65 hours.
9, you shouldn 8767 t float charge a lithium battery
5, When you are fully charged which shouldn 8767 t be, you are not a battery. you should just stop risking over-charging yourself.