Electronic switch type equalizing circuit of power battery management system
A technology for electronic switching and balancing circuits, applied in battery circuit devices, circuit devices, current collectors, etc., can solve problems such as low stability of relays, improve driving power and electromagnetic interference, long service life, and solve common mode problems. Effects of voltage problems
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[0028] The present invention will be further described below in conjunction with the drawings.
[0029] This circuit is used in conjunction with the voltage detection and control circuit of the battery management system.
[0030] Since the power battery is in an open circuit, there is a certain relationship between the state of charge (SOC) of the single battery and the open circuit voltage (OCV). Here, it is believed that the voltage equalization of the single battery can achieve the balanced battery pack state of charge ( SOC) effect.
[0031] The precise detection circuit detects the voltage of each battery, and the MCU determines the number of single cells whose voltage is lower than the average voltage, and the time and current that need to be balanced.
[0032] The MCU gives a control signal, selects the equalizing branch corresponding to the single battery, and controls the voltage and current of the equalizing power supply, so that the single battery can be balanced.
[0033] T...
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