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It is understood that the high-pressure hydrogen storage tank adopts a three-layer structure, the inner layer is a resin lining that seals hydrogen, the middle layer is a carbon fiber reinforced resin (CFRP) layer to ensure compressive strength, and the surface layer is a glass fiber reinforced resin layer
that protects the surface.
Through lightweight technology, the high-pressure hydrogen storage tank equipped with Toyota's "MIRAI" fuel cell vehicle uses 40%
less carbon fiber.
The storage performance of high-pressure hydrogen storage tanks is measured by the weight of hydrogen storage divided by the weight of the tank to obtain weight efficiency, and by reducing the amount of CFRP by 40%, the weight efficiency is improved by 20% to the world's highest level of 5.
7wt.
%.
The lightweight of MIRAI's hydrogen storage tanks is aimed at the middle layer
.
The middle layer uses a filament winding process
in which carbon fibers impregnated with resin are tensioned to roll up and laminate.
There are three winding methods: ring winding of the reinforced cylinder, high-angle spiral winding of the reinforced edge and low-angle spiral winding of the reinforced bottom, all of which reduce the number of
winding turns.
In addition, for the very strict local fire test newly designed in accordance with the global technical rules of high-pressure hydrogen storage tanks, the method of protecting the impact-resistant polyurethane shield that absorbs falling impact with a fire-resistant polyurethane sheet containing expanded graphite is adopted to ensure fire resistance
.
In this way, even if fire resistance is added, it is possible to balance both fall resistance and fire resistance without changing the original tank state
.
It is understood that the high-pressure hydrogen storage tank adopts a three-layer structure, the inner layer is a resin lining that seals hydrogen, the middle layer is a carbon fiber reinforced resin (CFRP) layer to ensure compressive strength, and the surface layer is a glass fiber reinforced resin layer
that protects the surface.
Through lightweight technology, the high-pressure hydrogen storage tank equipped with Toyota's "MIRAI" fuel cell vehicle uses 40%
less carbon fiber.
The storage performance of high-pressure hydrogen storage tanks is measured by the weight of hydrogen storage divided by the weight of the tank to obtain weight efficiency, and by reducing the amount of CFRP by 40%, the weight efficiency is improved by 20% to the world's highest level of 5.
7wt.
%.
The lightweight of MIRAI's hydrogen storage tanks is aimed at the middle layer
.
The middle layer uses a filament winding process
in which carbon fibers impregnated with resin are tensioned to roll up and laminate.
There are three winding methods: ring winding of the reinforced cylinder, high-angle spiral winding of the reinforced edge and low-angle spiral winding of the reinforced bottom, all of which reduce the number of
winding turns.
In addition, for the very strict local fire test newly designed in accordance with the global technical rules of high-pressure hydrogen storage tanks, the method of protecting the impact-resistant polyurethane shield that absorbs falling impact with a fire-resistant polyurethane sheet containing expanded graphite is adopted to ensure fire resistance
.
In this way, even if fire resistance is added, it is possible to balance both fall resistance and fire resistance without changing the original tank state
.
