Quote:
Originally Posted by zeropointbug
Found an article on A123's next gen cell, a 20Ah prismatic. They also said some 4, 6, and 8Ah cells are due to be produced as well? That would be nice for us RCers. It says cost will be drasticall reduced, power density has doubled  and energy density has gone up as well, 50%, on par or higher than LiPo apparently. The 26650 is 100Wh/kg, so 150Wh/kg vs. 140 Wh/kg for Lipo?
The prismatic cell features an increased energy density through new anode and cell designs. New materials provide increased cycle life and energy density. On the cathode side, A123Systems has scaled up its efforts to reduce costs through improved and more efficient processes, and continues to expand cathode development to improve both capacity and energy.
At the cell level, the energy density (Wh/kg) of the new 20Ah cell is 50% greater than that of the old 26650 cylindrical cell (from 2007), while the module level energy density increased by 30%. |
Looks cool, I'd really like to see some new A123s come out.
Nice ebikes guys. Question tho, is there any other ways other than the twist-grip unit to interface w/ a esc using PWM?
Basically I'm starting another project, but its going to be a ride-on power wheels for my son. They just use relays to control on/off power supply from the motor to cheap johnson electric motors. I can use a number of old brushed controllers just fine (even inexpensive BL controllers) but I'm trying to figure out a way to interface the foot pedal to the esc using PWM.