A direct collection-photoelectric-thermoelectric compound isotope battery and its preparation method

Abstract

The invention discloses a direct collecting-photoelectric-thermoelectric combined isotope battery, which comprises a radiation source and an energy conversion structure. The isotope battery has a columnar structure, and two ends of the energy conversion structure are equipped with a battery positive electrode and a battery negative electrode respectively; the energy conversion structure comprises a metal substrate, a vacuum cavity, a transparent charge collecting plate, a photoelectric assembly and a thermoelectric assembly; the radiation source is arranged on the side surface of the columnar metal substrate, the transparent charge collecting plate is arranged in the periphery of the side surface of the radiation source, the vacuum cavity is arranged between the two, and the outer side surface of the transparent charge collecting plate is sequentially provided with a first transparent insulating substrate, the photoelectric assembly, a second transparent insulating substrate and the thermoelectric assembly; two ends of the photoelectric assembly and the thermoelectric assembly are provided with first electrical output electrodes and second electrical output electrodes respectively; and the surface of the energy conversion structure, and the positive electrode and the negative electrode of the battery are coated with a cushion, and the outer surface of the cushion is provided with an inner packaging cooling layer and an outer packaging cooling layer. The battery has the advantages of high energy conversion efficiency, large output power, strong environmental applicability, good work stability and long service life.

Description

Technical field [0001] The invention belongs to the technical field of isotope batteries, and specifically relates to a direct collection-photoelectric-thermoelectric composite isotope battery; the invention also relates to a method for preparing a direct collection-photoelectric-thermoelectric composite isotope battery. Background technique [0002] The composition (or energy state) of the nucleus changes spontaneously, and the isotope that emits radiation is called a radioisotope. Radioisotope battery, abbreviated as isotope battery, uses a transducer device to convert the energy of radiation emitted when the radioisotope decays into electrical energy output, so as to achieve the purpose of power supply. Because isotope batteries have the advantages of long service life, strong environmental adaptability, good working stability, no maintenance, and miniaturization, they have been widely used in important fields such as military defense, aerospace and navigation, polar explorati...

AI Technical Summary

Problems solved by technology

[0004] The research results of the above four types of isotope batteries show that the low energy conversion efficiency is still the common feature of current isotope batteries

The development of static thermoelectric isotope batteries mainly benefits from the research and development at the national level, especially the design and manufacture of thermoelectric isotope batteries (radioisotope thermoelectric generators, RTG). The energy conversion efficiency is low. Even the enhanced multi-mission radioisotope thermoelectric generators (eMMRTG) recently reported by NASA has a conversion efficiency of less than 10% (http: / / www.jpl.nasa.gov / news / news.phpfeature=6646), so its scope of use is very limited, and the process of civilian use is relatively difficult

Radiation voltaic effect isotope batteries use semiconductor materials as energy conversion units, which can realize the miniaturization of isotope battery devices, expand the application range of isotope batteries, and have achieved certain research results with the rapid development of material science, but radiant volta There is a problem of performance degradation of semiconductor materials under long-term radiation irradiation, which reduces the service life of radiation-volt effect isotope batteries

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