The patent under discussion pertains to a hydrogen gas storage tank equipped with several safety features.
The invention aims to enhance the safety and efficiency of hydrogen gas storage by incorporating mechanisms that regulate gas discharge and prevent accidental releases during high-temperature scenarios. Filed on December 5, 2024, by Toyota Jidosha Kabushiki Kaisha, this innovation focuses on improving the reliability of hydrogen storage systems, which are crucial for applications such as fuel cell vehicles.
A key feature of this hydrogen gas storage tank is the inclusion of a self-closing valve. This valve is integral to the system as it controls the start and stop of hydrogen gas discharge from the container. By automating the opening and closing of the valve, the storage system ensures that hydrogen gas is released only when needed, thereby minimizing the risk of leakage and enhancing operational safety.
Another critical component of the design is the fusible plug. This plug is engineered to open when a predetermined temperature threshold is reached, enabling the release of gas from the tank to prevent over-pressurization. Such a safety feature is vital in scenarios where the tank may be exposed to high temperatures, reducing the risk of catastrophic failure and contributing to overall system safety.
The patent describes the implementation of a mechanism to manage heat transfer within the storage system. Specifically, the design includes a member that delays heat transfer to the self-closing valve and/or promotes heat transfer to the fusible plug. When the hydrogen cartridge experiences heating, this differential heat transfer strategy ensures that the self-closing valve remains unaffected by heat-induced expansion of hydrogen gas for as long as possible, while the fusible plug responds promptly to prevent pressure build-up.
Hydrogen storage solutions with enhanced safety features are critical for advancing fuel cell technologies and hydrogen-powered vehicles. This patent offers a practical approach to mitigate risks associated with hydrogen storage, aligning with industry trends toward safer and more efficient energy solutions.
