Power supply management device and method based on field-programmable gate array

The invention provides a power supply management device and method based on a field-programmable gate array. The method comprises the following steps that: a voltage conversion and charging control module converts a first voltage signal from a power battery into a second voltage signal with a voltage value different from that of the first voltage signal; when the current voltage of the power battery is greater than the working threshold voltage of the power battery and the current voltage of the storage battery is not greater than the charging threshold voltage of the storage battery, the voltage conversion and charging control module is controlled to transmit a second voltage signal to the storage battery; and the storage battery voltage is sampled through the field-programmable gate array, the optimal charging current of the storage battery is obtained through calculation, and the voltage conversion and charging control module is controlled to adjust the charging current of the storage battery, so that the