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Advantages and disadvantages of lithium-ion batteries

(1) Advantages of lithium-ion batteries

1) The energy density is high, and its volumetric energy density and mass energy density can reach 450W. h/dm3 and 150W. h/kg, respectively, and are constantly increasing.

2) The average output voltage is high (about 3.6V), which is three times that of Ni Cd and Ni l batteries.

3) High output power.

4) Low self discharge, below 10% per month, less than half of Ni Cd and Ni Mol.

5) Without the same memory effect as Ni Cd and Ni MH batteries, the cycling performance is superior.

6) It can be charged and discharged quickly, with a capacity of over 80% of the nominal capacity when charging at 1C.

7) High charging efficiency, basically 100% after the first cycle.

8) The working temperature range is wide, ranging from -30 to+45 ℃. With the improvement of electrolyte and positive electrode, it is expected to be expanded to

-40~+70 ℃, low temperature may expand to -60 ℃.

9) No maintenance required.

10) Environmentally friendly, it is called a green battery.

11) Long service life, 100% DOD charging and discharging can reach more than 900 times; When using shallow depth (30% DOD) charging and discharging, the number of cycles has exceeded 5000.

(2) Disadvantages of lithium-ion batteries

1) High cost, especially the high price of positive electrode material LiC002. With the continuous development of positive electrode technology, LiMn204, LiFeP04 and other materials can be used as positive electrodes, which is expected to greatly reduce the cost of lithium-ion batteries;

2) Special protective circuits must be installed to prevent overcharging or over discharging;

3) Poor compatibility with regular batteries, as lithium-ion batteries can only be used as a replacement when three regular batteries (3.6V) are used.

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