The battery is generally considered to be free of any heavy metals and rare metals (Ni-MH batteries require rare metals), non-toxic (SGS certified), non-polluting, in line with European RoHS regulations, is an absolute green battery certificate. Therefore, the reason why lithium batteries are favored by the industry is mainly environmental considerations. Therefore, the battery has been included in the "863" national high-tech development plan during the "10th Five-Year Plan" period, and has become a national key support and encouragement development project. With China's accession to the WTO, the export volume of electric bicycles in China will increase rapidly, and electric bicycles entering Europe and the United States have been required to be equipped with non-polluting batteries.
However, some experts said that the environmental pollution caused by lead-acid batteries mainly occurs in the production process and recycling process of enterprises. In the same way, lithium batteries are good in the new energy industry, but it can not avoid the problem of heavy metal pollution. Lead, arsenic, cadmium, mercury, chromium, etc. in the processing of metal materials may be released into dust and water. The battery itself is a chemical substance, so there may be two kinds of pollution: one is the process waste pollution in the production process; the other is the battery pollution after the scrap.
Lithium iron phosphate batteries also have their disadvantages: for example, poor low temperature performance, low tap density of the positive electrode material, and a lithium iron phosphate battery having a capacity of more than lithium cobalt oxide, and thus have no advantage in terms of a micro battery. When used in a power battery, a lithium iron phosphate battery, like other batteries, needs to face battery consistency problems.