Is lithium iron phosphate battery really safe?

Nowadays, people objectively have to choose between the two technologies of lithium iron phosphate battery and ternary lithium battery when purchasing new energy vehicles. Industry insiders tell us that the ternary system should be chosen for battery life and vehicle lightness, and the lithium iron phosphate system should be chosen for safety. Consumers urgently hope that industry insiders can provide a practical answer from a technical perspective: Is lithium iron phosphate batteries safe? This question needs to be answered from three aspects: material/structural stability, production process, and charge discharge characteristics.

1. Lithium iron phosphate is currently the safest positive electrode material for lithium-ion batteries, which does not contain any harmful heavy metal elements to the human body. Its olivine structure makes it difficult for oxygen to precipitate, improving the stability of the material.

2. The production process of lithium iron phosphate batteries is generally the same as other lithium battery varieties, with core processes including ingredients, coating, rolling, slicing, and winding. In the ingredient process, the conductivity of lithium iron phosphate material is relatively poor, so the particles are generally made smaller. The objective effect of this is that the internal arrangement is more uniform, which promotes the formation of a balanced voltage platform and can maintain the stability of the battery during operation.

3. Charging and discharging are two basic working states of lithium batteries. When lithium iron phosphate batteries are charged and discharged, due to the weak oxidation ability of iron ions, oxygen will not be released, making it difficult to undergo redox reactions with the electrolyte. This makes the charging and discharging process of lithium iron phosphate batteries in a safe environment. Moreover, lithium iron phosphate batteries are difficult to undergo drastic redox reactions during high rate discharge and even overcharging and discharging processes. At the same time, after lithium is deintercaled, the lattice change causes the final volume of the crystal cell (the smallest constituent unit of the crystal) to shrink, which precisely offsets the increased volume of the carbon negative electrode in the reaction. Therefore, during charging and discharging, lithium iron phosphate batteries can maintain the stability of their physical structure, eliminating the hidden danger of battery explosion caused by volume increase.

The safety of the battery mentioned above is explained using a single unit as an example for convenience. When put into use, lithium iron phosphate batteries need to provide a rated voltage and capacity suitable for electrical appliances. At this time, it is necessary to carry out lithium iron phosphate battery grouping work, that is, to equip the single lithium iron phosphate battery into a practical lithium battery group through series/parallel/series parallel connection. The most important thing to pay attention to in this combination work is the consistency of each individual battery. Usually, it also comes with a balanced management system that ensures the safety of lithium battery use through key parameter control, which is a common feature of various types of lithium battery packs.

Guangzhou Battsys Co., Ltd (NEEQ:837375), was founded in 2006, which is a join-stock high-tech enterprise engaging in ODM and OEM , specially for customized and diverse research&production of lithium-ion battery，BATTSYS annual production capacity is tens of millions battery cells. The products are exported to dozens of countries & regions such as Europe, America & Asia etc.