Li-ion battery (Li-ion) is a lithium-evolved. Therefore, introducing the Li-ion, before introducing lithium batteries. For example, previously used button batteries inside the camera belongs to Li-ion battery. Lithium battery cathode material is manganese dioxide, or thionyl chloride, lithium anode. After the completion of the battery assembly that is the battery voltage, without charge. Such cells may also be charged, but the cycle performance is not good, in the charge-discharge cycle, the easier the formation of lithium dendrite, causing internal short-circuit the battery, so under normal circumstances in which such the battery charging is prohibited. Later, Japan’s Sony Corporation has come to carbon materials as the anode, lithium-containing compounds in order to make positive, in the charge-discharge process, there is no lithium metal, and only lithium-ion, which is lithium-ion battery. When charging the battery when the battery on the positive lithium ion generation, resulting lithium-ion movement through the electrolyte to the cathode. As the carbon anode layered structure, it has a lot of micro, to lithium-ion on the anode embedded in porous carbon layer, the embedded lithium-ion the more the higher the charge capacity.
Similarly, when the battery discharge (ie, the process we use the battery), embedded in the carbon cathode layer of lithium-ion extrusion, but also movement back to positive. Back to the cathode of lithium-ion the more the higher discharge capacity. We usually say that the battery capacity is the discharge capacity. In the Li-ion charge-discharge process, lithium-ion transition from the positive → negative → positive moves in space. Li-ion is like a rocking chair, rocking chair at both ends of the battery poles, while the lithium-ion rocking back and forth as players do run. Therefore, also known as Li-ion rocking chair dell 75uyf battery,dell c1295 battery.
2. Lithium-ion battery cells which of these parts?
(1) battery cover from top to bottom
(2) positive - active substances for the lithium cobalt oxide
(3) diaphragm - a special kind of composite membrane
(4) negative - active substances for the carbon
(5) Organic electrolyte
(6) Battery shell (divided into two kinds of steel and aluminum)
3. Lithium-ion Battery What are benefits? What disadvantages?
Lithium-ion battery has the following advantages:
1) The single cell voltage of up to 3.6-3.8V:
2) than the energy larger than the present to achieve real energy 100-115Wh/kg and 240-253Wh / L (2 times the Nl-Cd, 1.5 times the Ni-MH), the future, as technological development, specific energy can be Up to 150Wh/kg and 400 Wh / L
3) The long cycle life in general can reach more than 500 times, or even 1000 times. For small electrical current discharge, the dell gd761 battery,dell kd476 battery will double the lifespan of electrical appliances competitiveness.
4) The safety performance is good, pollution-free, no memory effect. As the predecessor of Li-ion batteries, due to the formation of lithium dendrite easy to short-circuit, reducing its application areas: Li-ion does not contain cadmium, lead, mercury, etc. elements of the environment pollution: Some processes (such as sintered) and Ni-Cd batteries there is a major drawback for the “memory effect”, seriously hindered the use of batteries, but Li-ion does not exist at this problem.
5) The self-discharge of small
Room temperature, full power Li-ion storage a month after the self-discharge rate of about 10%, much lower than Ni-Cd of 25-30%, Ni, MH 30-35%. Lithium-ion dell td347 battery,dell u4873 battery also exist some disadvantages, such as:
1) The high cost of batteries. Mainly reflected in the price of LiCoO2 high (Co resources to small), electrolyte purification system difficult.
2) can not be high-current discharge. As the organic electrolyte system, and other reasons, the battery internal resistance compared to other type of batteries big. Therefore, I demand a smaller discharge current density, the discharge current at 0.5C below normal, only suitable for small and medium-current electrical use.
3) The need to protect the line control.
A, overcharge protection: Battery over charge would undermine the positive structure, which affects the performance and life; the same time, the overcharge to the electrolyte decomposition, excessive internal pressure caused by leakage and other problems; and therefore must be under constant pressure 4.1V-4.2V charge;
B, over-discharge protection: over-discharge recovery of active substances will lead to difficulties, they also need protection circuit control. dell d5318 battery,dell g5266 battery.
