Power module, power supply system, vehicle and photovoltaic system

The invention provides a power module, a power supply system, a vehicle and a photovoltaic system, the power module comprises a first metal layer-coated substrate, a plurality of chips and a first connecting sheet, a first electrode of each chip is electrically connected with a first metal layer of the first metal layer-coated substrate, the first connecting sheet comprises a first main body part and a plurality of first contact parts, and the first main body part is electrically connected with the plurality of first contact parts. The second electrode of each chip in the plurality of chips is in contact with at least one first contact part, and a part of the first main body part is arranged between at least one pair of adjacent first contact parts. Current flowing out of the chips can directly flow into the first main body part through the first contact parts, current flowing paths are reduced, the chips are connected in parallel through the first connecting pieces, the parasitic inductance of the power modu