The energy density of canode materials for lithium-ion batteries has a major impact on the driving range of electric vehicles. In\norder to study the charge-discharge characteristics and application feasibility of Li-NiMnCo lithium-ion batteries for vehicles, a\nseries of charge and discharge experiments were carried out with different rates of Li-NiMnCo lithium-ion batteries (the ratio of\nnickel, cobalt, and manganese was 5 : 2 : 3) in constant-current-constant-voltage mode. Firstly, a set of charge-discharge\nexperiments were performed on different types of single-cell lithium-ion batteries. The results show that, under temperature\nconditions, the charge and discharge voltage-capacity curves of the four different types of Li-NiMnCo lithium batteries\nmentioned in the paper are not much different, and the charge-discharge characteristic curves are similar, indicating that\ndifferent types of batteries with the same material composition have similar charge and discharge characteristics.\nSubsequently, a series of charge and discharge tests with different rates were conducted on such ternary lithium batteries.\nThe characteristic curves with different charge-discharge rates indicate that this new type of ternary lithium battery has\nhigh current charge and discharge capability and is suitable for use in new energy electric vehicles. In addition, by\nanalyzing the voltage-SOC curve under different magnification conditions, it is known that there is an approximate linear\nrelationship between the battery voltage value and the SOC within a certain SOC range. The SOC value can be evaluated\nby the battery voltage, which should be controlled within a reasonable range to avoid overcharge or overdischarge of\nbattery, thereby, causing permanent damage to the battery.
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