FAULT DETECTION METHOD, SYSTEM, ELECTRONIC DEVICE AND MEDIUM

A fault detection method includes: sequentially transmitting a first control signal to control chips corresponding to each of the plurality of battery switches after detecting a reverse feeding fault, when the plurality of battery switches are turned on and the plurality of utility power switches are turned off, causing a corresponding battery switch to be turned off; and detecting a difference between a front and a back terminal voltage of each of the plurality of utility power switches connected to the corresponding battery switch when the corresponding battery switch is turned off, where each of the plurality of utility power switches is off; determining that the plurality of utility power switches are short-circuited when a difference between the front terminal voltage and the back terminal voltage of at least one of the plurality of utility power switches is greater than or equal to a preset threshold; otherwise, determining that the plurality of utility power switches are normal.