Manufacturing method of radioactive isotope battery

Abstract

The invention provides a manufacturing method of a radioactive isotope battery. The method comprises the steps that the inner wall of a transparent container is coated with a powdery luminescent material, a radioactive material is put into the container, rays generated by decay of the radioactive material excite the luminescent material to emit radiation light to the outside of the container, theradiation light irradiates a photoelectric conversion device, and energy in the radiation light is converted into electric energy. By using the technical scheme of the invention, gaseous tritium isotope or solid tritiated titanium powder is selected as a radioactive material, widely exists in earth atmosphere and nature, and is convenient to store and transport, so that the manufacturing process of the radioactive isotope battery is greatly simplified, the output voltage of the electric energy generated through conversion of the radiation material can reach 0.8 V, the high voltage can be provided through the series connection and parallel connection of a plurality of modules, the output energy is stable, the service life of the radioactive isotope battery is prolonged, the manufacturing cost is reduced, and a foundation is laid for wide commercial application of the radioactive isotope battery.

Description

technical field [0001] The invention relates to the technical field of radioisotope batteries, in particular to a manufacturing method of radioisotope batteries. Background technique [0002] "Radioisotope battery" is also called "nuclear battery". It is manufactured by using semiconductor transducers to continuously emit energetic rays during the decay process of isotopes and convert the decay energy into electrical energy. Nuclear batteries have been successfully used as power supplies for spacecraft, pacemaker power supplies, and some special military applications. A nuclear battery is a device that uses the decay of radioactive isotopes to emit energetic particles (such as alpha particles, beta particles and gamma rays) and convert their energy into electrical energy. According to the level of voltage provided, nuclear batteries can be divided into high-voltage type (hundreds to several thousand V) and low-voltage type (tens of mV-1V or so). According to the energy conv...

AI Technical Summary

Problems solved by technology

However, at present, there is no commercial radioisotope battery production capacity in China.

The international commercial radioisotope batteries mainly include isotope thermoelectric batteries and radiation batteries, but isotope thermoelectric batteries are difficult to miniaturize, and the only miniaturized nuclear isotope batteries are radiation batteries.

In the current research, there are three main problems in the production of radioisotope batteries. One is that the output power is very low, generally in the range of tens of nanowatts, and the other is that the battery life is lower than the expected life, which is much shorter than the half-life of radioisotopes. ; The third is that the energy conversion efficiency of the battery is also very low, usually less than 2%

The above factors seriously restrict the popularization and application of radioisotope batteries. At the same time, the existing production methods of radioisotope batteries are relatively difficult, and there is an urgent need to simplify the process.

Images