Switch with OptiMOS 3 series MOSFET
Switch with OptiMOS 3 series MOSFET, they have extremely low on-resistance, conduction losses arising from negligible. Each cell block consists of Infineon's 8-bit microcontroller XC886CLM control, the controller has Flash and 32KB data memory; two CAN interfaces support hardware using ordinary cars Controller Area Network (CAN) bus protocol for communication, reducing the processor load; hardware multiplication and division algorithm unit (MDU) to improve the operation speed. As long as the battery pack out of the current is less than the average balance current, the vehicle can continue driving until the battery runs out the last one.
Since the transformer can be used in both directions, we can balance the situation in two different ways. First of all individually control circuit detects the battery voltage, calculate the average, and then find the maximum deviation from the mean voltage of the battery. If the battery voltage is lower than the average, the use of lower equilibrium (bottom-balancing) method; if the voltage is higher than the average, then the upper balance (top-balancing) method. In one of the battery state of charge reaches the lower limit, the lower limit equilibrium method can extend the working hours of the battery pack.
Primary winding switch is closed, Then switch off the main winding, secondary winding of the corresponding switch is closed (in this case the primary winding 2 of the switch), the energy stored in the transformer to the addressed cell.Each cycle consists of two active pulse and an interval components. In this case the period of 40ms, The design of the transformer frequency should be higher than 20kHz, A possible solution is to use a differential amplifier array, in order to prevent the magnetic core of the transformer noise is generated by the elasticity. the energy fed into the main winding through a large battery pack.
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