Unmanned aerial vehicle power supply device

The invention provides an unmanned aerial vehicle power supply device which is suitable for the field of power supplies. The device comprises a power supply module, a digital steering engine voltage module, two constant voltage output modules and a variable voltage module, wherein the power supply module adopts lithium battery multipath output and independent filtration and respectively provides stable power supply for GPS (Global Positioning System) self-driving equipment and image/data equipment; the digital steering engine voltage module realizes double-path power supply voltage stabilizing filter output by using a double-combined voltage reducing chip and provides working voltage for a digital steering engine; the two constant voltage output modules directly supply power to airborne equipment by a filter circuit; and the variable voltage module provides voltage demands meeting different kinds of airborne equipment by the voltage reducing chip. In the invention, voltage is reduced by utilizing a single battery pack through associated integrated chips so as to meet different equipment demands, thereby the cost is reduced and the reliability is improved; by adopting the latest technology lithium ion battery, the weight is reduced, and the effective flight load of an unmanned aerial vehicle is increased. By adopting dual-redundant power supply, the reliability is improved.