What are the advantages of lithium batteries

1. The working voltage is high. The working standard voltage of the single rechargeable battery is 3 times that of the Ni-Cd and Ni-H rechargeable batteries.

2. Energy density: the specific energy density that can be achieved at this stage is 100-125wh/kg and 240-300wh/l (twice Ni Cd and Ni MH). With the technical development trend in the future, the energy density can reach 150wh/kg and 400wh/l.

3. The cycle system has a long life, which is generally more than 500 times or even 1000 times For household appliances with small current charge and discharge, the service life of rechargeable batteries will double the competitiveness of household appliances.

4. Good safety factor, no pollution, no memory effect As the original name of Li ion, lithium battery is very easy to cause short-circuit fault due to twinning of metal lithium, which reduces its application scope: the key defect of Li ion is not that it contains cadmium, lead, mercury and other elements that pollute the natural environment; some processing (such as calcination) Ni Cd rechargeable batteries have "practical memory effect", which seriously limits the application of rechargeable batteries, However, Li ion has no problems in these aspects.

5. The lithium battery has small self discharge. After one month of storage, the lithium battery life rate of liquid lithium filled with electricity at normal temperature is about 10%, which is far less than 25-30% Ni Cd, 30-35% Ni, MH.

6. Charge the battery quickly, and the 1C battery can achieve more than 80% of the short-circuit capacity.

7. The operating temperature range is very large, reaching -25~45 ° C. with the improvement of lithium battery electrolyte and battery cathode materials, it can be expanded to -40~70 ° C.

In addition, lithium batteries also have some disadvantages, such as:

1、 The cost of rechargeable batteries is higher. The key reason is that the price of battery cathode material LiCoO2 is high (less co resources), and the electrolyte solution management system cannot be purified.

2、 It is not easy to cause large current charging and discharging. The internal resistance of lithium battery pack is larger than that of other types of lithium battery packs, including electromechanical solute solution system software. Therefore, the regulations on charge and discharge current intensity are relatively small. Generally, the charge and discharge current flow is below, which is only applicable to small and medium-sized household appliances.

3、 Route manipulation must be maintained. Overcharge maintenance: overcharge of rechargeable battery will destroy the positive structure, endanger the characteristics and service life; In addition, overcharging will dissolve the electrolyte of lithium battery, and the internal working pressure is too high, resulting in problems such as liquid leakage; Therefore, the battery must be charged under the constant current source; B. Power loss maintenance: excessive discharge will cause the active substance to be irreparable, so it must be operated by the maintenance line.