The invention provides a compact all-weather photovoltaic-thermoelectric
coupling device and a working method thereof, and relates to the technical field of solar
photovoltaic power generation, the compact all-weather photovoltaic-thermoelectric
coupling device comprises a thermoelectric power generation module, an optical splitter module and a photovoltaic
cell module; the thermoelectric power generation module is of a vertical structure, is perpendicular to the placement plane of the
coupling device, and sequentially comprises a
radiation refrigeration layer, a thermoelectric device and a
solar heat collection layer. The optical splitter module comprises a cold-end optical splitter on the same side as the cold end of the thermoelectric device and a hot-end optical splitter on the same side as the hot end of the thermoelectric device, the cold-end optical splitter and the hot-end optical splitter are separately arranged on the two sides of the thermoelectric power generation module and are obliquely arranged, the cold-end optical splitter and the
radiation refrigeration layer form an included angle of a set angle, and the hot-end optical splitter and the
solar heat collection layer form an included angle of a set angle; and the photovoltaic
cell module comprises two photovoltaic cells which are parallel to the placement plane of the coupling device and are connected with the lower end of the optical splitter. According to the invention, full-spectrum-range utilization of
solar energy, all-weather power generation and stability of
system power generation are ensured.