For our go-kart project have we chosen 27 40Ah Thunder Sky batteries.
The weight of the batteries is total 43 kg. The maximum peak discharge current is 800A in 5 seconds within 1 minute. And can handle a continues discharge of 120A within 15 minutes.
Each cell operating in the area of 2,8V to 4,0V and have a nominal operating voltage of 3,2V. The cells are damaged if the voltage drops below 2,5V and above 4,2V. So its wise to fit a BMS system to protect the cells.
When LiPo cells are charged and discharged with high current the cells can swell. To avoid swelling the batteries have to be squeezed together.
Summary
+ Low weight (1,6 kg/cell)
+ High discharge current (800A max.)
+ High charge current (120A with temperature monitor and 30A without)
+ Easy to handle and mount.
– High price.
– The cell needs to be squeezed together to avoid damage to the cell pouch in extreme use.
