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Thank you! I have a 1min rest before the discharge cycle start, can i thus take the rest voltage just before the discharge cycle start and then use the 5th voltage measurement into the discharge cycle as my loaded voltage and current?

Hi Everyone I bought 200 unmatched brand new 100Ah Lifepo4 cells...long story. Anyway, I then brought all of them to my university and hooked them up the 18650 matching machine and started doing a capasity test at 0.1C / 10A , due to the fact that this is the max current per channel for this...

Thank you so much! But does unmatched Cells cause a decrease in lifecycle of battery pack?

Thank you so much! But does unmatched Cells cause a decrease in lifecycle of battery pack?

Thank you! What is the easiest way to determin IR?

Hi Everyone I am building a couple of Lifepo4 48V 100Ah solar storage banks. I bought 160 x 100Ah cells that are not matched. Is it necessary to match them by internal resistances after top balancing them?

Thank you @RCinFLA I will be discharging @ 100A max( 60A Continuously) and charging @ 40A max from inverter. Thus I will be pulling 30A continuously from both batteries and charging them each at 20A max. So what would happen if battery1 hits 3.65V 2 minutes before battery2? Do I have to...

Thank you @Steve_S. Here is my diagram and idea. Please can someone comment on it.

@Steve_S could you please give me advice in my other thread? I hacked the ANT-BMS completely and can control every single function separately using a micro controller. https://diysolarforum.com/threads/ant-bms-in-parallel-configuration.11317/

Thank you so much for detailed explanation! I know right!!!Crazy amount of force. Anyway, do you suggest we compress from both sides or just the side with the larger area?

Hi Everyone I would like to know if anyone has successfully connected two 16S ANT BMS's ( 48V100Ah System) in parallel? Cells are from same batch in both batteries. We ask the seller and he said: " For Parallel, our bms do not support that. the parallel bms have hardware DCDC to avoid large...

Hi Everyone I purchased a bunch of cells from a reputable supplier. The supplier suggest I should compress cells from both sides (500-1000kg of force) to unsure a long cycle life. He mentioned that the cells are a "rolled" technology and that's why they should be compressed. Please see attached...

I mean ill discharge them manually and them connect them in parallel and connect the power supply set at 3.65V. No BMS connected tight now

Thanks No cells are connected to each other at the moment. I wil discharge those two cells a bit and then connect all of them in parrallel?

And my bench power supply can supply 5A max

I will make sure power supply is at 3.65 using my fluke. Most cells are at 3.337V and two cells are at 3.5V

Can I leave the power supply unattended at set voltage 3.65V overnight?

Thank you so much for the thorough explanation! Any suggestions if i need to top balance a lot of cells? Should I discharge them all to 2.5 and then just connect them in a 16cell pack and let the BMS top balance them for me? Im using ANT bms

Thank you! Make sense. Sorry for the stupid question. Okay but last, what is the fastest and most effective way to top balance cells? Im using ANT bms

All the research I done suggested bottom balancing for solar. Cell supplier also recommended it.

Hi Everyone I have a question regarding bottom balancing. Here is my question/hypothesis: Lets say I buy 16 LiFePo4 100Ah brand new cells from a supplier. After purchasing I hook them up to a DIY discharger that uses a 100W resistor and an arduino to measure when voltage reach 2.5V, when it...