Lithium battery is currently the main market is the application of portable terminal equipment, which makes high-capacity lithium battery development has become the main direction, but in the electric car and large-scale storage equipment under the background of the full development of lithium-ion battery research and development of the main direction also The trend of diversification.

Traditional mobile terminal markets, such as cell phones and laptops, require high capacity because they often need to be charged once for a long time. Swept the world's Apple iphone and ipad and so on because of a charge after the use of time is not long and was criticized by consumers, therefore, in the new release of the new ipad, the original 6500mAh capacity lithium battery to use 14000mAh large capacity lithium battery. This matter can be seen as a portable terminal with a rechargeable battery research and development in the direction of high-capacity proof, for this, even at the expense of life to achieve high capacity, and the requirements of life is generally about 2 years.

However, in the era of electric vehicles, lithium-ion battery research and development direction has changed, and now the electric car mainly includes hybrid, plug-in hybrids and pure electric vehicles three types. For hybrids, large power exchanges are required for acceleration and deceleration, so high power batteries are ideal. On the contrary, pure electric vehicles because only powered lithium battery to provide electricity, so the need for large capacity support, plug-in hybrid is between the two. This can be concluded: in the high-power lithium battery requirements, hybrids> plug-in hybrids> pure electric vehicles; and in the large-capacity lithium battery requirements on the contrary, pure electric vehicles> plug-in hybrids > Hybrid cars. Of course, this is the comparison between different electric vehicles, on the whole, the lithium battery for electric vehicles in the capacity and power requirements than the portable terminal several times higher, but also requires a higher life and safety, in addition to It can not enter the industrialization stage.

Fixed device use of large-scale energy storage facilities compared to the performance requirements of electric vehicles is also increased a number of times, from the security alone, for the building power storage system and household power storage system, must have a fire will not burn " High "safety performance, and electric vehicles and portable terminals with lithium batteries obviously do not have this requirement. Fixed storage facilities within the energy storage facilities can also be divided within the different major demands. In the case of grid power used to convert the peak power during the daytime daytime discharge, the battery is required to have a large capacity, such as a lithium battery for energy storage facilities for building systems. For photovoltaic power generation and wind power generation, it is necessary to use high-power batteries with high resistance to changes in output power. Because of the great influence of natural factors, the output power of these two power generation devices changes greatly.

With the lithium battery to large-scale application of the transition and change, making the lithium battery itself to solve the fundamental problem has been inadequate, resulting in a combination of lithium-ion battery and traditional double-layer capacitor advantages of lithium-ion capacitors, but also the development of new redox flow battery The new technology is in the synchronous development phase.

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