PeteW
New Member
No BMS as yet (More on this below.), so I'm doing some top balancing 4, 280Ah cells at a time (As opposed to building 12V batteries and pre-charging). If you see this I'd be interested in your opinions on this.
I began doing some top balancing 4 cells at a time yesterday. I only did them for an hour per set of 4 cells. I did two sets yesterday and two sets today, 4 cells per set, 16 cells altogether. I did take notes about cell voltages before, during and after. I took notes on PS and multimeter voltages during and PS amperage reading at the beginning and end of each top balance session. I was pretty conservative. I turned the amperage up to 10A approximately, but kept the voltage at 3.55V. I numbered each cell when I first received them, so I've kept a log. I checked the voltage of each cell before starting so I could have something to reference. I won't get into a long explanation, preferring to wait for questions. I mostly want to make sure I'm not doing any harm. This is mostly a learning exercise for me. When I began the voltage ranges between my 16 cells were 3.271V - 3.290V. Current resting voltage between 4, 4 cell banks is 3.291 and 3.294.
I began doing some top balancing 4 cells at a time yesterday. I only did them for an hour per set of 4 cells. I did two sets yesterday and two sets today, 4 cells per set, 16 cells altogether. I did take notes about cell voltages before, during and after. I took notes on PS and multimeter voltages during and PS amperage reading at the beginning and end of each top balance session. I was pretty conservative. I turned the amperage up to 10A approximately, but kept the voltage at 3.55V. I numbered each cell when I first received them, so I've kept a log. I checked the voltage of each cell before starting so I could have something to reference. I won't get into a long explanation, preferring to wait for questions. I mostly want to make sure I'm not doing any harm. This is mostly a learning exercise for me. When I began the voltage ranges between my 16 cells were 3.271V - 3.290V. Current resting voltage between 4, 4 cell banks is 3.291 and 3.294.
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