Radioisotope batteries based on gaseous radioactive sources

Abstract

The invention discloses a radioisotope cell based on a gaseous radioactive source. The radioisotope cell comprises a glass container filled with the gaseous radioactive source, a light emitting layer deposited on the inner wall of the glass container and a photovoltaic conversion unit arranged on the outer wall of the glass container. The glass container is filled with gaseous radioisotopes which can perform spontaneous decay and emit radioactive particles. The light emitting layer is used for absorbing the radioactive particles and converting energy of the radioactive particles into optical energy. The photoelectric conversion unit is used for converting light emitted by the light emitting layer into electric energy. The radioisotope cell is reasonable in design, long in service life, high in energy density, low in maintenance cost and strong in anti-jamming capability, and provides the basis for producing commercial radioisotope cells.

Description

technical field [0001] The invention relates to a radioisotope battery, in particular to a radioisotope battery based on a gaseous radioactive source. Background technique [0002] 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. [0003] In the current research, there are three main problems with radiant voltaic batteries. First, the output power is very low, in the range of tens of nw; second, the battery life is much lower than the expected life, much shorter than the half-life of radioisotopes; The energy conversion efficiency is also very low, usually less than 2%. The above factors have led to a very limited range of applications. In the past 10 years, some research...

AI Technical Summary

Problems solved by technology

Although there are foreign technologies that use solid-state radioactive sources to excite inert gases to emit light, and then use photovoltaic devices to convert light energy into electrical energy, due to the high self-absorption effect of solid-state radioactive sources, the film thickness of solid-state radioactive sources usually does not exceed 5um, resulting in The loading of radioisotope is very low, the output power of the battery is very low

At the same time, the luminous intensity of the inert gas is relatively weak, and the photovoltaic device can only work in the low-efficiency range, so the overall energy conversion efficiency of the isotope cell is not high.

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