Charging control method and device, energy storage system and electronic equipment

Abstract

This invention provides a charging control method, device, energy storage system, and electronic device, relating to the field of energy storage system technology. The method includes: generating a first duty cycle control signal based on photovoltaic input voltage, photovoltaic input current, battery voltage, battery current, and the inductor current of a first converter; calculating an estimated photovoltaic charging current based on the inductor current and the duty cycle of the first output bridge arm; obtaining an estimated grid charging current based on the battery current and the estimated photovoltaic charging current; generating a second duty cycle control signal based on the battery voltage, battery current, and the estimated grid charging current; and adjusting the duty cycle of the output bridge arm based on the duty cycle control signal to adjust the battery voltage and / or battery current. This invention's technical solution eliminates the need for a portion of the sampling circuitry, enabling precise control of the energy storage battery charging process while considering cost, thus ensuring the stable operation of the energy storage system.

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