Why do old batteries for electric vehicles need to be recycled?

Everyone should know that when the battery of an electric vehicle is replaced, the old battery is generally recycled. So why do manufacturers recycle old batteries? Because electric vehicle waste batteries have the following three hazards: 　　 (1) The battery is damaged due to long-term exposure to the environment through corrosion, resulting in leakage of heavy metals, acids, alkalis, etc., and electrochemical corrosion. The role of the battery is more concentrated, the corrosion of stacked battery shells and the leakage of pollutants accelerate the penetration of electrolyte into the soil environment or groundwater.　　 (2) The battery 'pouring acid' phenomenon exists in the recycling of batteries. Small recycled lead plants generally only purchase lead-containing battery panels, which causes individual recyclers to dump the waste acid in the battery directly into the soil and urban sewage pipes. The average lead content of the soil contaminated by this waste acid is 1~50C In the range of /kg, it seriously exceeds the background value of lead content in the soil. Soil organic matter is destroyed, fertility is reduced, and crops cannot grow normally. The heavy metal salts, acids and alkalis contained in the waste batteries of electric bicycles are hazardous wastes, and the pollution caused by them has the characteristics of long cycle, large concealment, and serious impact. Waste batteries contain heavy metals such as mercury, lead, cadmium, nickel, and electrolyte solutions such as acids and alkalis, which are harmful to the human body and the ecological environment to varying degrees.　　(3) Waste batteries contain heavy metals such as mercury, lead, cadmium, nickel, and electrolyte solutions such as acids and alkalis, which are harmful to the human body and the ecological environment to varying degrees. These toxic substances enter the human body through various channels, and long-term accumulation is difficult to eliminate. They will damage the human nervous system, hematopoietic function and bones, interfere with renal function, reproductive function, and easily cause chronic poisoning, paralysis, and even cancer. Prev: How much electricity does an electric vehicle battery need for one charge?