Since the birth of the first battery, the battery application area is more and more broad, from small electronic products gradually to large, more large areas of application development. The current large-scale applications are mainly focused on electric vehicles, the future may be in the energy storage power station, electric vehicles and energy storage power stations are batteries used in power batteries, power batteries are classified as lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries.

Lead-acid batteries are mainly used in automobile starting and daily power supply, but there is a tendency to be replaced by secondary batteries, nickel-metal hydride batteries in the power, self-discharge rate and memory effects and other shortcomings, it must be a transitional nature Products, the transition period may be only 10 years, and the trend is more and more obvious.

Lithium-ion battery is the latest new energy vehicle power supply, it was originally used in small appliances, at present, in the mobile phone and notebook computer market has been completed the process of dominating the country, the most lively application of topics focused on the field of power vehicles. However, power lithium battery large-scale applications have many problems need to be a substantial breakthrough, especially technical bottlenecks.

First, from the pilot effect, large-scale application of poor results. According to the China Association of Automobile Manufacturers statistics, last year the national new energy vehicle production for the 8368, sold 8159, of which private car less than 1/10, which shows that the new energy vehicles do not agree with the general national. As early as 2009, the national four ministries and commissions to start a new energy vehicle "ten city 1000" promotion project, plans to use three years each year to develop 10 cities, each city launched 1000 new energy vehicle demonstration run, but last year In October, the promotion target was only about 38%. As the results are not satisfactory, in 2012 the country will not add new pilot cities.

Second, because the concept of lithium battery heat diminished, although the private consumer market is not mature, but there are some companies with venture capital and limb backdoor listing, making the power lithium battery overcapacity, chaos ringing. According to market research, a mobile phone lithium battery production line of enterprises to build about 1 billion, while the same power battery business at least 2 billion, the result is really little money, most of the start-up enterprises are aimed at the future market. Some low-level production line construction can recover the cost as scheduled, to achieve the target is a problem.

Third, the most fundamental problem is the difficulty of technological breakthroughs, the market and investment problems can actually be attributed to the extension of this problem, here is divided into four small problems: 1, lack of power, power car demand power The battery is very strong, so the power of lithium battery energy density must reach 250 ~ 350Wh / kg, in order to achieve large-scale industrialization, but the actual energy density of the current domestic can only do 100Wh / kg or so; 2, power is not enough from research and development power 3, the main performance indicators, especially in terms of safety and reliability is not yet mature; 4, the standard is not uniform, the detection is not the same as the shortcomings of the key materials and equipment level, not to do long-term planning, science.

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