Cell voltage equalizing control method using dynamic reference
A voltage equalization control and voltage technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of short equalization time, increased overall charging equalization time, large equalization error, etc. Simple structure and long balanced effect
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[0032] see figure 2, BT1, BT2..., BTn are battery cells in the series battery pack, and the charger is connected to the series battery pack in parallel to charge the series battery pack. A DC / DC module and a voltage-dividing sampling resistor are connected in parallel between the positive and negative electrodes of each battery cell BT1, BT2..., BTn. The voltage-dividing sampling resistors corresponding to the battery cells BT1, BT2..., BTn are sampling Resistors S1, S2..., Sn. The resistance value of each voltage-dividing sampling resistor is equal to the number of battery cells. The voltage-dividing sampling resistor is used to sample the total output voltage of the battery pack in real time, and the total output voltage is the average cell voltage.
[0033] The DC / DC module can be a power conversion module of various topologies such as forward type, flyback type, and BUCK-BOOST (boost-boost converter). While the charger is charging the battery pack, each voltage-dividin...
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