I am planning to build a 24v battery with 16 Grade-A Frey cells to make a 24V 200A battery (4.8 kWh). The cells will be put together in pairs to create "one cell" with busbars and then in a series (S8). Do the connections in a series need to be equal length? Can you use a cable to link some of the paired cells and bus bars with others as shown in attached images?
Battery cell arrangement/series
- Thread starter Jet
- Start date
Ampster
Renewable Energy Hobbyist
There will be a subtle increase in resistance due to the longer length bus bar or the different materials. Increasing bus bar or interconnect size can reduce that. a good BMS can account for that. I have a similar issue with a 3P16S battery I am configuring. I hope by rearranging cells to keep almost all bus bars the same length.
Would it be better to use extra long (and thicker/rated for twice the current) bus bars (image 3b) or cable (image 3)? Would the extra long bus bar setup put extra draw/load on cells marked as 4 and 5, 8 and 9, 12 and 13, and an uneven load to the the outside cells in those connections?
