A hydrogen-absorbing low-strain metal hydride hydrogen storage tank

Abstract

The invention belongs to the hydrogen storage technology in the hydrogen energy field and particularly relates to a hydrogen-absorption low-strain metal hydride hydrogen storage tank. The hydrogen storage tank mainly comprises a tank body, a metal hydride hydrogen storage alloy bed body and an elastic buffer layer. The elastic buffer layer is arranged between the tank body and the metal hydride hydrogen storage alloy bed body. A heat exchange pipe is communicated with the interior of the metal hydride hydrogen storage alloy bed body and used for guiding heat generated in the hydrogen absorption and release processes of the metal hydride hydrogen storage alloy bed body out. A hydrogen valve is installed on an outlet of the tank body and meanwhile a hydrogen filter is welded to the outlet end of the tank body. The hydrogen-absorption low-strain metal hydride hydrogen storage tank is simple in structure and easy to obtain, the destructive effect on the tank body due to the fact that the metal hydride hydrogen storage alloy bed body expands after absorbing hydrogen can be relieved effectively, and the use safety of the hydrogen storage tank is improved.

Description

technical field [0001] The invention belongs to the hydrogen storage technology in the field of hydrogen energy, in particular to a hydrogen-absorbing low-strain metal hydride hydrogen storage tank. Background technique [0002] With the intensification of the energy crisis and the strengthening of environmental protection awareness, the utilization of hydrogen energy has attracted more and more attention. In the practical process of hydrogen, the storage of hydrogen has always been the focus of research by scientists. Commonly used hydrogen storage technologies mainly include: high-pressure gaseous hydrogen storage, low-temperature liquid hydrogen storage, and solid-state hydrogen storage using hydrogen storage materials as the medium. [0003] The main disadvantage of high-pressure gaseous hydrogen storage is the low volume hydrogen storage density, and the volume hydrogen storage density of a 70MPa high-pressure gaseous hydrogen storage tank is only 28kg H 2 / m 3 , whi...

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Problems solved by technology

However, metal hydride hydrogen storage materials will cause particle pulverization due to volume expansion and contraction during the cycle of hydrogen absorption and desorption, and the accumulated fine powder will generate a huge internal stress during the hydrogen absorption process. Acting on the inner wall of the hydrogen storage tank will cause stress and strain on the tank wall; if the strain is too large, the container will be deformed or even ruptured, causing safety accidents

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