The voltage of the nickel-hydrogen battery is 1.2V. The idea was put forward in the 1970s. A lot of research was concentrated in the 1980s. Industrial production began in the early 1990s. Ni-MH batteries were originally a substitute for nickel-cadmium batteries. The toxic element cadmium was no longer used and the environmental pollution hazards caused by heavy metal elements were eliminated. Ni-MH batteries have 30% more power reserve than nickel-cadmium batteries, lighter than nickel-cadmium batteries, and have a longer service life. It can reduce the memory effect in nickel-cadmium batteries to a certain extent, so that nickel-hydrogen batteries can be more widely used. The application scope includes the following aspects. Power supply for portable electronic devices: Since the commercialization of lithium-ion batteries in the 1990s, in the following ten years, lithium-ion batteries have replaced nickel-hydrogen batteries and occupied portable electronics Equipment market; in the communications field, nickel-metal hydride batteries are also forced to basically withdraw. However, the current price of nickel-metal hydride batteries is lower than that of lithium-ion batteries, and the safety performance is also superior to that of lithium batteries. Therefore, some notebook computers have begun to use nickel-hydrogen batteries again, Because of these two advantages, nickel-metal hydride batteries have also begun to partly return in the fields of power tools, digital cameras, electric vehicles, mobile phones and mobile power supplies. In terms of applicability, nickel-metal hydride batteries have superior low-temperature performance and are also suitable for high-current discharge. , So it is often assembled into nickel-metal hydride battery pack
s to meet the needs of portable electronic equipment. The application fields in this area cover almost all walks of life. Such as: portable printers, mobile tools, digital products; medical equipment, telecommunication equipment, LCD TVs ;Communication equipment, laser equipment, instrumentation and electric toys, etc.).u003cpu003eu003c/pu003e Power battery: Ni-MH battery's high energy density, high power, pollution-free and other comprehensive characteristics also make it suitable for use as a power battery Some nickel-metal hydride battery factories have developed the use of nickel-metal hydride batteries for power cars, electric motorcycles and electric bicycles. This feature has also been extended to the military field and used in communication backup power supplies, space technology, robots and submarines. In China, nickel-metal hydride batteries have achieved rapid development. In 2006, China produced 1.3 billion nickel-metal hydride batteries, surpassing Japan to become the largest producer. This is because China has 70% of the world’s rare earth reserves, and the rare earth is nickel hydrogen. The main raw material of battery negative electrode hydrogen storage alloy. In the above-mentioned application fields, the use of nickel-metal hydride batteries is reflected in the Chinese market. The main directions are mobile communications, laptops, power tools and automotive battery packs.u003c/pu003e
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