NOVELTY - A solar vanadium-titanium electric bike electricity-generating device comprises electric bike generating device, niobium-titanium battery and three-dimensional paint solar battery. The vanadium-titanium solar battery comprises light-heat transforming part and heat-electric transforming part connected in series; the light-heat transforming part comprising vanadium slag mixed with ceramic raw material, 35 wt.% vanadium slag mixed with fiber material and molded by rolling or half dry rolling.    USE - Solar vanadium-titanium electric bike electricity-generating device.    ADVANTAGE - The stroke of the electric bike is increased, thus prolonging service life of the chargeable battery.    DETAILED DESCRIPTION - A solar vanadium-titanium electric bike electricity-generating device comprises electric bike generating device, niobium-titanium battery and three-dimensional paint solar battery. The central position of front wheel of the electric bike is provided with large-power generator for use of automobile, gear transmission device and switch power source; generator comprising rotor gear of generator, gear installed in rotor of generator, and provided with direct-current-high-frequency square wave transforming circuit for transforming 12 V direct current into high-frequency square wave; high-frequency transformer for transforming high-frequency square wave into 38 V voltage; two-stage bridge rectifying circuit for rectifying current of gear at the inner edge of the front wheel to gear of generator rotor of 1:20. The vanadium-titanium solar battery comprises light-heat transforming part and heat-electric transforming part connected in series; the light-heat transforming part comprising vanadium slag mixed with ceramic raw material, 35 wt.% vanadium slag mixed with fiber material and molded by rolling or half dry rolling until thickness of 3.2 mm, blank plate with projection area not less than 0 m2 dried and sintered at 1100 degrees C as vanadium-titanium ceramic black flat plate, the two flat plates having certain distance, the two ends provided with inlet and outlet passage ports and end cap plates, joint parts of the four sides and middle lining plates closely connected with bonding material with temperature lower than that of vanadium-titanium ceramic black plate by adhesive to form large-size vanadium-titanium ceramic black hollow plate via curing or sintering, glass flat plate with less larger size than hollow plate placed on heat resisting concave mold for heating, glass plate recessed downwards with mold by pressurization, hollow plate placed on glass via pre-heating, temperature and pressure regulated such that glass plate is closely connected with hollow plate, or glass plate is molded firstly and then sealed, the space formed by the glass plate and the hollow plate is vacuumized and closed. The heat-electric transforming part comprises easily obtained strontium titanate, precise and superthin film. The preparation of niobium-citric diethanolamine solution involves putting niobium oxide in hydrofluoric acid, agitating at 76 degrees C to fully dissolve niobium oxide to form niobium oxide solution, dripping ammonia into solution to form white niobium hydroxide precipitate, standing solution for 5.5 hours; after filtration, washing precipitate by 3.5% dilute ammonia, dehydrating and drying precipitate in vacuum; and dissolving dried precipitate at 71 degrees C in citric diethanolamine water solution, and fully agitating solution to obtain niobium-citric diethanolamine solution. The preparation of prodromous liquid of strontium titanate adulterated with niobium comprises weighing strontium acetate, tetrabutyl titanate and niobium-citric diethanolamine solution; dissolving strontium acetate in acetic acid to form solution A; dripping diacetone with ion mol ratio of more than 0.95 times titanium (Ti(4+)) into tetrabutyl titanate, and dripping glycol methyl ether solvent to form mixed solution; adding glycol and glycerol into mixed liquid, with ratio of glycol to glycerol of 3.5:1, the total amount of glycol and glycerol should make concentration of the solution at 0.15-0.4 M of strontium (Sr(2+)), agitating solution uniformly to form prodromous liquid of strontium titanate adulterated with niobium; coating prodromous liquid of strontium titanate adulterated with niobium obtained in step b on a base sheet, after heat decomposing, sintering prodromous liquid of strontium titanate adulterated with niobium; clamping super thin strontium titanate film with generated electrons and having thickness of 0.4 nm in middle of two insulators of two strontium titanate insulators to form structure like sandwich such that the electrons can be kept, of 3-5 film layers. The input end of the power chargeable battery is connected with solar battery, and the anode output end is connected with diode in series. The three-dimensional paint solar battery formed by optical fiber and nanometer wire comprises optical fiber and zinc oxide nanometer array vertically growing on surface of optical fiber; the incident light is reflected many times during transmission, the incident light will interact with the paint adhered to the surface by zinc oxide nanometer line to increase light absorption and delivery efficiency of light electron.    DESCRIPTION OF DRAWING(S) - The drawing shows cross-sectional view of the solar vanadium-titanium electric bike electricity-generating device.