Green battery refers to a kind of high performance and pollution-free battery which has been put into use or is being developed in recent years. At present, metal hydride nickel storage batteries, lithium ion storage batteries and mercury-free alkaline zinc-manganese primary batteries and rechargeable batteries are widely used, as well as lithium or lithium-ion plastic storage batteries and fuel cells that are being researched and developed. In addition, solar cells (also known as photovoltaic power generation), which have been widely used and use solar energy for photoelectric conversion, can also be included in this category.