Button batteries must have been seen by everyone, a small one does not occupy the place, but also durable.
It is generally used in backup power supplies for various electronic products, such as computer motherboards, electronic watches, electronic dictionaries, electronic scales, remote controls, electric toys, pacemakers, electronic hearing aids, counters, cameras and other microelectronic products.
Button batteries are also divided into chemical batteries and physical batteries, and their chemical battery applications are the most common. They are composed of an anode (positive electrode), a cathode (negative electrode), an electrolyte thereof, and the like. As shown on the right. Its appearance is stainless steel, and it is used as a positive electrode. Its negative electrode is a stainless steel circular cover. The positive and negative electrodes are insulated by a sealing ring. The sealing ring is made of nylon. The sealing ring can prevent electrolyte leakage in addition to insulation. . There are many types of button batteries, most of which are named after materials used, such as silver oxide batteries, lithium batteries, and alkaline manganese batteries.
At present, the button type is also adopted in the capacitor. At present, the common one is the button-flange capacitor, which has a wide working temperature limit. Since the adsorption and desorption rates of ions in the supercapacitor do not change much at low temperatures, their capacity changes are much smaller than those of batteries. Commercial supercapacitors have an operating temperature range of -40°C to +80°C.
Maintenance free can be achieved. The supercapacitor has high charging and discharging efficiency, has a certain tolerance to overcharge and overdischarge, and can stably charge and discharge repeatedly, and theoretically, maintenance is not required.
And green. Supercapacitors do not use heavy metals and other harmful chemicals in the production process, and have a long life span, so they are a new type of green power source.