The invention discloses a novel phase-change cooling and heating integrated structure for power batteries. The novel phase-change cooling and heating integrated structure comprises 
power battery module fixtures, a temperature sensor and a 
control unit. Blowup aluminum uniform heating plates are closely arranged in gaps in two sides of each 
cylindrical power battery, the 
cylindrical power batteriesare longitudinally arrayed, the shapes of the blowup aluminum uniform heating plates are matched with the outer contours of cylindrical cells, the blowup aluminum uniform heating plates are in clinging contact with curved surfaces of the various 
cylindrical power batteries, blowup aluminum uniform heating slabs and heat exchange 
copper flat pipes are sequentially arranged at the tops and the bottoms of 
power battery modules in an overlaid manner, the corresponding blowup aluminum uniform heating slabs and the corresponding heat exchange 
copper flat pipes are in 
heat transfer contact with heatconduction planes at two ends of each blowup aluminum uniform heating plate, and heating films wrap the heat exchange 
copper flat pipes positioned at the bottoms of the 
power battery modules. The novel phase-change cooling and heating integrated structure has the advantages that heat can be efficiently dissipated for power battery packs under diversified 
charge and discharge working conditions, or the power battery packs can be efficiently heated under the various 
charge and discharge working conditions, the temperatures of the cells can be controlled, 
temperature difference between the different cells can be effectively reduced, accordingly, the integral power battery packs can work in reasonable temperature ranges, and heat of the cylindrical power battery modules which are densely arranged can be effectively managed.