3.2v 60ah lifepo4 battery.Working principle of iron lithium batteries

　　Working principle of iron lithium batteries

　　The full name of iron lithium battery is lithium iron phosphate lithium-ion battery, which is also called "lithium iron power battery" due to its particularly suitable performance for power applications. (hereinafter referred to as "lithium iron battery")

　　Working principle of lithium iron batteries (LiFePO4)

　　The internal structure of LiFePO4 battery is shown in Figure 1. On the left is LiFePO4 with a olivine structure as the positive electrode of the battery, connected by aluminum foil to the positive electrode, and in the middle is a polymer separator that separates the positive and negative electrodes. However, lithium ion Li+can pass through while electron e - cannot. On the right is the negative electrode of the battery composed of carbon (graphite), connected by copper foil to the negative electrode of the battery. The electrolyte of the battery is located between the upper and lower ends, and the battery is enclosed in a metal shell.

　　During charging of LiFePO4 batteries, the lithium ion Li+in the positive electrode migrates to the negative electrode through a polymer separator; During the discharge process, the lithium ion Li+in the negative electrode migrates to the positive electrode through the separator. Lithium ion batteries are named after the migration of lithium ions during charging and discharging.

　　Main performance of LiFePO4 batteries

　　The nominal voltage of LiFePO4 batteries is 3.2 V, the termination charging voltage is 3.6 V, and the termination discharging voltage is 2.0 V. Due to differences in the quality and process of positive and negative electrode materials and electrolyte materials used by various manufacturers, there may be some differences in their performance. For example, for the same model (standard batteries in the same packaging), there is a significant difference in battery capacity (10%~20%).

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