What are the advantages and disadvantages of lithium battery cells?

著者：Iflowpower – ຜູ້ຜະລິດສະຖານີພະລັງງານແບບພົກພາ

The lithium ion battery has the following advantages: 1) high voltage, the operating voltage of the monomer battery is as high as the Ni-Cd, the Ni-H battery 3 times 2) is larger than energy, and the actual ratio energy that can be achieved is 100-125WH / kg and 240-300Wh / L (2 times in Ni-CD, 1.5 times in Ni-MH) Both can reach more than 500 times, or even more than 1000 times. For small current discharge electrical appliances, the battery life will compete between multipliers.

4) Good safety, no public hazard, no memory effect. Battery, due to metallic lithium to form a short circuit, which reduces its application: Li-iON contains no cadmium, lead, mercury, etc., the environment contains contaminated elements: part of the process (such as sintered) Ni-CD battery existence A major illusion is "memory effect", which is severely bound by battery, but Li-Ion does not exist in this area.

5) Small self-discharge, Li-iON storage of charged charge at room temperature 1 month is about 10%, which is much lower than 25-30%, Ni, MH of Ni, MH, 50-35% below Ni-CD. 6) The quick charge and discharge, 1C charging is capacity to reach more than 80% of the nominal capacity. 7) High operating temperature range, operating temperature is -25 ~ 45 ¡ã C, with the improvement of electrolytes and positive electrodes, expectation to -40 ~ 70 ¡ã C.

Lithium-ion battery also has a certain disadvantage 1) battery cost is higher. Mainly manifested in the high price of the positive electrode material LiCoO2 (less resources in Co), and the electrolyte system is difficult to purify. 2) Do not discharge high current.

Because of the reasons such as organic electrolyte systems, the internal resistance of the battery is large with other batteries. Therefore, the smaller discharge current density is required, and the general discharge current is 0.5c or less, which is only suitable for electrical use of small and medium currents.

3) Require protection line control. A, overcharge protection: battery overcharge will damage the positive structure and affect performance and life; at the same time, the electrolyte is decomposed, the internal pressure is too high, and the leakage is caused; so it must be under 4.1V-4.

2V constant pressure Charging; B, overprote protection: overlapping can lead to difficulties in restoration of active substances, so it also needs to protect line control. 4) Charging battery definition charging battery is also known: battery, secondary battery, battery can be repeatedly charged. Common: lead-acid batteries (used for automotive, commonly known as "battery"), cadmium nickel battery, hydrogen nickel battery, lithium ion battery.

5) The rated capacity of the rated capacity battery of the battery refers to the amount of electricity that is discharged when the battery is discharged to the cutoff voltage under certain discharge conditions. The IEC standard specifies that nickel-cadmium and nickel-hydrogen batteries are charged with 0.2C to 1.

0V at 0.2c to 1.0V at a rated capacity of the battery at 0.

1c to 1.0V at 0.1C.

AH, MAH in uni.