source:Industry News
release time:2023-06-14
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Lead-acid batteries
The application of lead -acid batteries has a long history and mature technology. It is a battery with a low cost and price, which has achieved mass production. Among them, the valve -controlled sealing lead -acid battery (VRLA) once became an important vehicle power battery, which is applied to EV and HEV developed by many European and American car companies. Electric vehicles, etc.
However, lead -acid batteries are lower than energy, shorter battery life, high self -discharge rate, and low circulation life; the weight of the main raw materials is large, and the environmental pollution of heavy metals may be generated during production and recovery. Therefore, the current lead -acid battery is mainly used for the ignition device when the car starts, as well as small equipment such as electric bicycles.
NiMH batteries
Power battery manufacturers say that nickel -metal hydride (NI/MH) batteries have good overcoming and over -release capabilities. There is no problem of heavy metal pollution, and the electrolyte increase or decrease will not occur during the work process. maintain. Compared with lead -acid batteries and nickel -cadmium batteries, nickel -metal hydride batteries have high energy, ratio and cycle life. The disadvantage is that the memory effect of the battery has a poor memory effect, and as the charging and discharge cycle is carried out, the hydrogen storage alloy gradually loses the catalytic capacity, the internal voltage of the battery will gradually increase, affecting the use of the battery. In addition, the more expensive price of nickel metals also leads to higher costs.
In terms of key materials, nickel -metalized batteries are mainly composed of positive electrode, negative electrode, septum and electrolyte, and the positive nickel electrode (Ni (OH) 2); the negative electrode generally uses metal hydrogen (MH); the electrolyte is mainly liquid, and the main ingredient is hydrogen Potassium oxide (KOH). At present, the research of nickel -metal hydride batteries is mainly on positive and negative materials, and its technology research and development is more mature.
Vehicle nickel -hydride batteries have achieved mass production and use. It is a car battery type that is used in hybrid vehicles.
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