Discharge characteristics of Lithium iron phosphate power battery.lithium boat batteries

　　As a kind of iron battery, Lithium iron phosphate power battery (hereinafter referred to as lithium iron battery) has been widely concerned by friends in the industry (some people also said that lithium iron battery is actually a kind of lithium ion battery). In terms of iron batteries, they can be divided into high-speed iron batteries and iron lithium batteries. Today, we will take the iron lithium battery model STL18650 as an example to specifically explain the discharge characteristics and lifespan of iron lithium batteries.

　　The discharge characteristics of STL18650 lithium-iron battery (with a capacity of 1100mAh) at different discharge rates are shown in Figure 2. The minimum discharge rate is 0.5C, and the maximum discharge rate is 10C. Five different discharge rates form a set of discharge curves. From Figure 1, it can be seen that regardless of the discharge rate, the voltage during the discharge process is very flat (i.e. the discharge voltage is stable and remains basically unchanged), and the curve only bends downwards when it reaches the termination discharge voltage (after the discharge amount reaches 800mAh, the curve bends downwards). Within the discharge rate range of 0.5-10C, the output voltage mostly varies within the range of 2.7-3.2V. This indicates that the battery has good discharge characteristics.

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