A hydrogen generator is a device that produces hydrogen through the process of water electrolysis. Common electrolytic hydrogen production processes include alkaline electrolysis (ALK), proton exchange membrane electrolysis (PEM), anion exchange membrane electrolysis (AEM), and high-temperature solid oxide electrolysis (SOEC). The hydrogen produced by the hydrogen generator is of high purity (up to 99.999%), and the entire process is pollution-free, making it an environmentally friendly method of hydrogen production. It is widely used in laboratories, industrial, and energy fields.