Thanks for reading and providing feedback on this. I have learned a lot but finally at a very long road on a project that got delayed by a year.
So I have a couple hundred 18650 that i am looking to make a 24v 7S. I am shooting for around a 28P but i am almost done with testing the batteries so that go up or down when i get them all changed.
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UPDATE. Broke down the cells from laptops and other packs to individuals cells. I then charged them up to 4.1 to 4.19 and noted it on each cell. I put them into storage to let them set but didnt get a chance to get back to them until about a week ago. I went back and check to make sure they were holding pretty close to the noted voltage and separated all that was not. I set up the capacity checking station, i have about 18 cells testing during the day. So at the point, most of them are capacity checked and documented on the cell. I also put them into different boxes, 500 to 1500, 1600 to 1900 and 2000+ . My way of testing is at 1 amp and I round down to the lowest whole number. example would be 2001 to 2099 would be listed at 2000.
I was going to start charging after i get everything tested, easier for me to do the one stage to the next at a time to keep from getting interrupted and loosing track. I have about a day left and then i can start the charging but wanted to know if it was better to charge on the pack level, cell back to a pack or done at the one on one level. I was going to use the tp4056 and the tester I have to charge the cells at a slow rate vs just pushing them hard. I have a LiitoKala Lii-500, 5 imax b6 and hand full of tp4056 to get them back up and going to back to correct voltage for use/building.
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Main point that I have not been able to (funny err opps) fully understand or need help with is, to charge the cells or packs.
My educated guess is to charge in cells so that you can identify any problem cells and help eliminate anyone that could be labeled a burner.
Any feedback or good reference point of reading/watching, is greatly appreciated. If I have left something out that should be needed to help with making a recommendation, please say so I will try my best to answer any question I can to help.
CB
Goal of having some on-grid living with the working to being self reliant.... =P
So I have a couple hundred 18650 that i am looking to make a 24v 7S. I am shooting for around a 28P but i am almost done with testing the batteries so that go up or down when i get them all changed.
+++++++++++
UPDATE. Broke down the cells from laptops and other packs to individuals cells. I then charged them up to 4.1 to 4.19 and noted it on each cell. I put them into storage to let them set but didnt get a chance to get back to them until about a week ago. I went back and check to make sure they were holding pretty close to the noted voltage and separated all that was not. I set up the capacity checking station, i have about 18 cells testing during the day. So at the point, most of them are capacity checked and documented on the cell. I also put them into different boxes, 500 to 1500, 1600 to 1900 and 2000+ . My way of testing is at 1 amp and I round down to the lowest whole number. example would be 2001 to 2099 would be listed at 2000.
I was going to start charging after i get everything tested, easier for me to do the one stage to the next at a time to keep from getting interrupted and loosing track. I have about a day left and then i can start the charging but wanted to know if it was better to charge on the pack level, cell back to a pack or done at the one on one level. I was going to use the tp4056 and the tester I have to charge the cells at a slow rate vs just pushing them hard. I have a LiitoKala Lii-500, 5 imax b6 and hand full of tp4056 to get them back up and going to back to correct voltage for use/building.
+++++++++++
Main point that I have not been able to (funny err opps) fully understand or need help with is, to charge the cells or packs.
My educated guess is to charge in cells so that you can identify any problem cells and help eliminate anyone that could be labeled a burner.
Any feedback or good reference point of reading/watching, is greatly appreciated. If I have left something out that should be needed to help with making a recommendation, please say so I will try my best to answer any question I can to help.
CB
Goal of having some on-grid living with the working to being self reliant.... =P