Equalization circuit and realization method based on buck-boost transformation and bidirectional lc resonant transformation
A technology of resonant transformation and equalization circuit, applied in charge equalization circuits, circuit devices, battery circuit devices, etc., can solve the problems of slow equalization speed and low efficiency, achieve large equalization voltage difference, reduce energy waste, and zero switching loss. Effect
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[0085] Such as figure 1 As shown in , it is assumed that the battery pack includes 4 battery cells, and it is assumed that B21 is the battery cell with the lowest voltage in the battery pack.
[0086] The microcontroller of the equalization circuit adopts digital signal processing DSP (TMS320F28335), which has high-precision AD sampling and PWM output; the multi-channel strobe switch adopts CD4051, which is a single 8-channel digital control analog electronic switch, with A, B and C three Binary control inputs and A total of 4 inputs, with low on-resistance and very low cut-off leakage current; the voltage detection circuit uses Linear Technology's LTC6803-1 dedicated voltage measurement chip to measure the voltage of each battery in the battery pack in real time.
[0087] The selector switch module selects a relay with a pair of normally open contacts, its model is HJR 1-2C L-05V, figure 1 Medium (S i1 , S i2 ) (i=1, 2, 3..., n) are a pair of normally open switches. The...
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