Hot spot current protective device of photovoltaic module

A hot spot current protective device of a photovoltaic module is composed of an N-type VDMOS and an integrated control circuit. The integrated control circuit is connected between the grid electrode and the source electrode of the N-type VDMOS and used for collecting current/voltage signals of a solar battery string, when the solar battery string works normally, the integrated control circuit controls the N-type VDMOS to be connected, and when the solar battery string works abnormally, the integrated control circuit controls the N-type VDMOS to be disconnected. When the module is shielded, each local solar battery piece is in a resistance-type state, so that the power loss of the entire battery string is borne, and thus the battery string can generate abnormal current/voltage change. By means of the hot spot current protective device of the photovoltaic module, the N-type VDMOS in the circuit can be turned off, the currents of the battery string can be cut off, and therefore the phenomenon that the battery pieces give out excessive heat so that hot spots can be formed is avoided.