merlinj

Thank You Liquidhandwash for your reply, but I believe I may have misexplained my project (sorry). My Project is to build a battery management system for a single cell (1s1p). Because of this I do not have to worry about cell balancing. Interms of over charging and under charging, I will use a lipo alarm to shut read the low voltage (around 3.4v in this case), and once it hits that, a relay hits and the charging shuts off. As for the 4.2 volt over charge I will also have a detector that will through a relay as soon as it reaches that voltage. Because of that, it will not be going through its constant voltage phase, and thus will not charge past 80%, however this will increase the longevity, and allow me to also use only constant current for charging it. I need a way to build that consta...

Thank You Liquidhandwash for your reply, but I believe I may have misexplained my project (sorry). My Project is to build a battery management system for a single cell (1s1p). Because of this I do not have to worry about cell balancing. Interms of over charging and under charging, I will use a lipo alarm to shut read the low voltage (around 3.4v in this case), and once it hits that, a relay hits and the charging shuts off. As for the 4.2 volt over charge I will also have a detector that will through a relay as soon as it reaches that voltage. Because of that, it will not be going through its constant voltage phase, and thus will not charge past 80%, however this will increase the longevity, and allow me to also use only constant current for charging it. I need a way to build that constant current charger.

I thought that batteries where suppost to be able to charge at atleast 2 c? they are 2400 milliam hour, so each parallel cell is 4.8 amp hours. If it is charging at 2 c, then it should charge at 9.8 amps right? why is that not happening?

hey, I know its been a while, but I finally built everything, and it works accept for one thing, The amperage the board pulls is not that much. I bought a board that can handle 15 amps, and lipos that can handle that as well, and for some reason, my 150 watt 12 laptop charger is only suppling it with about 1.7 amps. The pack can defiantly supply more, the lipos can take more, and so can the board. When I tried measuring the resistance between the two power terminals with only the batteries connected to the board, the resistance came up basically undefined. It didnt say zero, and didnt say any number, it just had a decimal place, and absolutely no numbers. My Question is this, what determines how much current it draws? and How do I make it draw more?Your help as been so helpful for me ma...

hey, I know its been a while, but I finally built everything, and it works accept for one thing, The amperage the board pulls is not that much. I bought a board that can handle 15 amps, and lipos that can handle that as well, and for some reason, my 150 watt 12 laptop charger is only suppling it with about 1.7 amps. The pack can defiantly supply more, the lipos can take more, and so can the board. When I tried measuring the resistance between the two power terminals with only the batteries connected to the board, the resistance came up basically undefined. It didnt say zero, and didnt say any number, it just had a decimal place, and absolutely no numbers. My Question is this, what determines how much current it draws? and How do I make it draw more?Your help as been so helpful for me man, thank you so much