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The main advantages and defects on lithium-ion batteries

by:Vglory      2020-12-07
Source: 2020 - 04 - 19:45, 14 hits: the main advantage of the lithium ion battery now, we can see the reason of the lithium ion battery in many areas, it has the following advantages: 1. The working voltage of high voltage: single lithium ion battery up to 3. 7 v even higher, and common nickel cadmium battery and the working voltage of nimh battery is only 1. 2v。 2. High specific energy: compared with other battery, equivalent mass or volume of lithium ion battery can provide higher energy. With the progress of human science and technology, there are some lithium ion battery can release the energy when more than 500 watts per kilogram, which makes them are more powerful than conventional batteries. 4. No memory effect, other rechargeable batteries, in use process, if want to charge, to the rest of the battery discharge, this is very troublesome, also seriously affect the use effect of the battery. Lithium ion battery can be charge, however, shows its advantage. 5. The cycle of good performance, such as lithium iron phosphate can reach more than 2000 times, and other common rechargeable battery is 300 - 600 times. So if you use lithium ion battery, will greatly increase the electric battery life of small discharge current, multiplied improve the competitiveness of the electrical appliances. 5. No memory effect, other rechargeable batteries, in use process, if want to charge, to the rest of the battery discharge, this is very troublesome, also seriously affect the use effect of the battery. Lithium ion battery can be charge, however, shows its advantage. 6. Low self-discharge: in the same storage conditions, under the same power, the lithium ion battery can keep much more power. 7. Working temperature range, the working temperature of lithium ion battery is in commonly - Between 30 ~ + 60 ℃, under high temperature and low temperature has good work performance. As the electrolyte and the improvement of the positive electrode, is expected to widen to - 40~+70℃。 8. It is a kind of environmentally friendly lithium-ion batteries, generally do not contain harmful substances. Lithium ion batteries some shortcomings at present, people have developed all sorts of lithium ion battery, there are many kinds of lithium ion battery, there are many kinds of classification of lithium ion battery, we can be classified according to the positive pole of the battery. Of course, due to the importance of lithium ion battery electrolyte and diversity, they are classified according to the electrolyte. The first is a liquid lithium ion battery, it is made of liquid electrolyte materials. The second is polymer lithium ion battery, which is composed of polymer and solid electrolyte materials. According to the previous article listed the advantages of lithium ion battery, you can see it has many obvious advantages, but also found some problems in research and application, mainly include the following: 1. Ageing: lithium ion battery capacity attenuation problem, but the attenuation has nothing to do with cycles, mainly related to the storage temperature. If the storage temperature is exorbitant, lithium ion battery will have more power attenuation. 2. Thermal safety problems: with the lithium ion battery in large capacity is more and more widely in the field of application of lithium ion battery in high temperature, short circuit and overcharge, vibration, impact extrusion, such as working conditions, easy to produce smoke, fire or explosion. Thermal safety of lithium ion battery has caused the attention of people, on the thermal security of lithium-ion battery research also more and more, more and more deeply. Compared with outstanding performance advantages, of course, these problems will not affect the wide use of lithium ion battery, people will increase to the problem of lithium ion battery and material performance improvement research
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