Thanks to all who readily share their experience and knowledge. I have a couple of pack design questions. After reviewing hundreds of video and forum posts, I have decided initially on creating 4 system packs consisting of 7S10P using new Samsung 30Q cells (3000ma @ 3.6v and Max continuous discharge current of 15A). I will then parallel these system packs together for what I believe to be a 30A at 25.2v. = 756Wh/pack x 4 packs = 3024Wh per entire system. The system will need to provide 30A max power for short periods but primarily the system will be only supplying <10A continuous for the application I have in mind.
First question I have is, I would like to know if fusing individual cells to nickel strips (.2mm x 8mm) instead of copper wire bus bars will be a problem for the load and size mentioned above. I realize the IR of nickel and cost is not as good as copper but its easier to work with for me.
Second question I have is, how to calculate the C rating for the cells in my application defined above. I believe the C rating of the cells above would be C5. How do I determine what the amp load each cell is going to be subjected to? I am thinking this is the way it would work but maybe Im wrong.
30A Load / 4 parallel system packs = 7.5A per system pack / 10 cells in parallel per pack= .75A per cell. Would this equate to a C .15 rating for each cell?
Thanks in advance for any comments and suggestions.
First question I have is, I would like to know if fusing individual cells to nickel strips (.2mm x 8mm) instead of copper wire bus bars will be a problem for the load and size mentioned above. I realize the IR of nickel and cost is not as good as copper but its easier to work with for me.
Second question I have is, how to calculate the C rating for the cells in my application defined above. I believe the C rating of the cells above would be C5. How do I determine what the amp load each cell is going to be subjected to? I am thinking this is the way it would work but maybe Im wrong.
30A Load / 4 parallel system packs = 7.5A per system pack / 10 cells in parallel per pack= .75A per cell. Would this equate to a C .15 rating for each cell?
Thanks in advance for any comments and suggestions.