For battery packs assembled from pouch cells, we can adjust the pack size to suit customer requirement, by put cells in different arrangement.
For example, to make a 24V50Ah LiFePO4 battery pack, we use 16 of 3.2V 25Ah LiFePO4 cells for assembling, the pack structure will be 8S2P, it means every 2 cells in parallel and 8 of them in series config. We always use 3V for calculation, but the real pack volt is 8*3.2=25.6V. The 3.2V 25Ah pouch cell have the size of 140*8.5*240mm (L*W*H, without tab), when we put 16 cells in stack as all 16 cells in one row, and use some extra foam for protection, the new size will be:
Length: (140mm +2mm tolerance) + 2mm*2 (foams) +1mm*2 (PVC sheets)+ 0.5mm*2 (shrink film) = 147mm
Width: (8.5mm+0.5mm tolerance) * 16 pcs + +1mm*2 (PVC sheets)+ 0.5mm*2 (shrink film) = 147mm
Height: (240mm +2mm tolerance) + 20mm (cell tab and welding etc) + 2mm*2 (foams) +1mm*2 (PVC sheets)+ 0.5mm*2 (shrink film) = 267mm.
The finished shrink film cell pack will have the size of 147*147*267mm.
If we build the BMS into this battery pack, assume BMS thickness is 12mm, necessary foam is 3mm, when put BMS at length direction, length will be increased to 147mm+12mm+3mm=162mm. The new pack size will be 162*147*267mm.
If put the BMS at height direction, the new height will be 267mm+12mm+3mm=282mm. The new pack size will be 147*147*282mm.
When built into metal case, please consider the reasonable space for holding the shrink film battery pack. For bigger battery packs, please consider to directly use the battery module structure.
Above steps will give customer a general idea of how our batteries packaged. For the exact size calculate, please contact us and we can help you well.
LiFePO4 battery, or LFP battery, the full name is the lithium iron phosphate battery, which belongs to one kind of rechargeable lithium batteries, battery takes LiFePO4 as cathode materials.
For original LiFePO4 have low electric conductivity, many battery manufacturers make efforts on improving original LiFePO4 materials, like nano-technology, metal-doping, carbon-coating etc. Bestgo-Power takes metal-doping and carbon-coating to update original LiFePO4 materials for battery manufacturing.
“ We were able to do some testing with some of the modules today, the 80Ah pack worked well in our walk behind model! Those Bestgo Packs made our mowers perform so much better it was just like a brand new machine! “