Are LifePO4 batteries toxic?
LifePO4 batteries are certainly toxic. In addition, the pollution is small compared with the lead-acid battery, because it does not use heavy metals and belongs to a light pollution industrial project, but the production should also pay attention to the following aspects:
1.Powder material is non-toxic, but inhalation protection is required.
2.SBR has a certain toxicity to prevent inhalation;NMP has mild toxicity, but no obvious effect, and needs to be done to prevent strong corrosion in contact with the body.
3.Electrolytes have some toxicity, Excessive inhalation and corrosiveness should be prevented.
What are the raw materials of LifePO4 battery?
There are four main raw materials for LifePO4 battery packs, which are anode material, cathode material, electrolyte and diaphragm.
1.Among the cathode materials, the most commonly used materials are lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate and ternary materials (the polymer of nickel-cobalt-manganese). Positive electrode materials occupy a large proportion (the mass ratio of positive and negative cathode materials is 3:1~4:1), because the performance of cathode materials directly affects the performance of lithium battery pack, and its cost directly determines the cost of the battery.
2.Among the cathode materials, the cathode materials are mainly natural graphite and artificial graphite. As one of the four component materials of the lithium iron phosphate battery pack, the cathode material plays an important role in improving the capacity and cycle performance of the battery, and is in the core link of the middle reaches of the lithium battery industry.
3.Market diaphragm materials are mainly polyethylene, polypropylene mainly polyolefin diaphragm. In the structure of lithium battery, the diaphragm is one of the key inner layer components. The performance of the diaphragm determines the interface structure and internal resistance of the battery, which directly affects the capacity, circulation and safety performance of the lithium battery pack. The excellent diaphragm plays an important role in improving the comprehensive performance of the battery.
4.Electrolytes are generally made of high purity organic solvent, electrolyte lithium salts, necessary additives and other raw materials, under certain conditions, according to a certain proportion. Electrolyte plays the role of conducting ions between the positive and negative electrodes of lithium batteries, which is the guarantee of high voltage and high specific energy of lithium iron phosphate batteries.
Safety of LifePO4 batteries
LifePO4 battery is the safest cathode material of lithium ion battery at present. Oxyis difficult to precipitate in its olivine structure, which improves the stability of the material.LifePO4 battery packs have been rigorously safety tested not to explode even in traffic accidents.
When LifePO4 battery is charged and discharged, because the oxidation capacity is not strong, it will not release oxygen, it is difficult to redox with the electrolyte, which makes the charging and discharge process of LifePO4 battery in a safe environment.The P-O bond in lithium iron phosphate crystal is stable and difficult to decompose. Even at high temperature or overcharge, the structure will not collapse and heat or form strong oxide. Therefore, LifePO4 battery has good safety.