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Cycle performance of lithium iron phosphate battery (experimental result graph)

by:dcfpower     2021-03-05
The data chart obtained through the experimental research of the previous article is shown in Figure 1, and we will analyze the cycle performance of the lithium iron phosphate battery. u003cpu003eFigure 1 Cycle performance of 20Ah lithium iron phosphate battery 1 Cycling of 20 Ah LiFePO4 batteryu003c/pu003e As one of the key components of electric vehicles, the battery's cost has even accounted for half of that of electric vehicles. Therefore, the battery life directly determines the cost of electric vehicles. Due to the stable chemical properties of the anode and cathode materials of lithium iron phosphate power batteries, the volume and stress changes during charging and discharging are very small, so its cycle life is very long. Figure 1 shows that a 2O Ah lithium iron phosphate power battery is charged to 3.65 V with a 1 C rate current, and then converted to a constant voltage until the current drops to 0.02 C; the discharge current is 1 c, and the cut-off voltage is 2.0 V (charge and discharge depth 100 %) Cycle life under conditions. It can be seen from Figure 1 that the remaining capacity of the battery is still more than 80% of the initial capacity after cycling more than 1600 times. Although the current cost of lithium iron phosphate power batteries is still relatively high, the longer battery life will significantly reduce the use and maintenance costs of electric vehicles. u003c/pu003e
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