I 'll give you some basic knowledge of batteries.

Overview of Battery Industry Development

(1) Overview of Battery Industry

The power supply device can be divided into physical power supply and chemical power supply. In the general sense, batteries mainly refer to chemical power sources, that is, the use of active substances to store energy, and then use their chemical reactions to release electrical energy. According to the nature and use of chemical power storage active substances, they can be divided into:

1 primary batteries(primary batteries): Batteries in which the active substance can only be used once. Such as zinc manganese batteries, alkaline manganese batteries, silver zinc batteries, lithium manganese batteries and so on.

Secondary Battery(Battery): Battery that can be recycled after charging after discharge. Such as lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, lithium ion batteries and so on.

3 Fuel cell: Battery in which the active substance is continuously supplied to the electrode from the outside.

The secondary battery is a kind of chemical power supply widely used in the world. It has stable voltage, safe and reliable, low price, wide range of application, and rich raw materials

The advantages of high recycling efficiency are that it is the most productive and widely used type of battery in the world. There are many types of secondary batteries and different properties. According to electrode materials, they can be divided into lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and lithium-ion batteries.

Primary batteries: Small, portable electrical appliances, such as home appliances, cameras and other digital products, generally have a capacity of less than 2Ah, easy to use, do not need to charge. Batteries can only be used once. After the power is consumed, it is abandoned. The cost of use is relatively high. Waste batteries can not be recycled and cause pollution to the environment.

Nickel-cadmium battery: high reliability, good recycling life, but high cost, mainly used in power tools, due to cadmium metal highly toxic, to the environment, production of workers 'bodies

Serious hazard, this series of batteries have been basically banned.

Nickel hydride batteries: green products developed on the basis of nickel-cadmium batteries, the basic characteristics of which are similar to cadmium nickel batteries. Applied to electric tools, etc., used in hybrid vehicles in recent years. The disadvantage is that the cost is high and the low temperature performance is poor. If it is used outdoors in winter, the capacity is greatly reduced, which limits the scope of application.

Common lithium-ion batteries: high monomer voltage, high volume and weight ratio, green environmental protection, is a high-end product in secondary batteries. Widely used in mobile phones, digital products, notebook computers,special models and so on. Its disadvantages are poor safety, easy fire and explosion, can only produce small batteries, can not make large-capacity batteries, large-capacity batteries are prone to fire, explosion.

lithium iron phosphate batteries: Lithium batteries with significant improvements in safety can produce large-capacity batteries for automobiles, energy storage, etc.. They can replace lead-acid batteries and nickel-metal hydride batteries in terms of function and performance, but the cost is much higher than lead-acid batteries. Similar to nickel-metal hydride batteries, it is currently only used on some high-end products and has a narrow application surface.

Fuel cell: It is considered to be the most advanced battery. It is extremely oxygen in the air. The negative electrode uses hydrogen or other materials that can produce hydrogen. The main product in operation is water, no pollution, and high conversion efficiency; However, the technology is not yet mature and it is not expected to be used for 15 years. In addition, the battery system is complex and can only be built as a large power station and can not be miniaturized.

Lead acid batteries: the lowest cost, wide range of applicable temperatures, recharging, and stable voltage platforms are the most widely used secondary batteries, such as vehicles such as automobiles, spare batteries for communications and power systems, solar and wind energy storage batteries, Electric car batteries. Small battery for emergency lighting, field systems. Used batteries can be recycled and raw materials can be recycled. Waste batteries, if properly recovered, treatment, will not cause harm to the environment.

(2) Overview of Battery Industry Development

During the "Eleventh Five-Year Plan" period, China's battery industry has achieved remarkable development and gradually established the status of the world's largest battery production country. The classification of battery industry in China's industrial economy has evolved from a small to a medium-sized industry, and is playing an increasingly important role in China's national economic construction.

China has gradually developed into the world's chemical and physical power production, processing and trade center. According to the statistics of the China Chemical and Physical Power Industry Association, during the "Eleventh Five-Year Plan" period, the average growth rate of chemical and physical power supply in China reached 30 %, the growth rate of chemical power supply exports was close to 15 %, and the output and export volume of solar cells averaged more than doubled each year. The speed of growth. In 2009, there were about 4,000 chemical and physical power production enterprises in China, and the total number of employees in the industry exceeded 1 million.

The total output of chemical batteries in 2009 was about 33.5 billion, more than half of the total global battery production. The total output of solar cells is about 4,000 MW, which is 40 % of the total global production; The total output value of chemical and physical power sources in the country exceeded 190 billion yuan, and the total export volume exceeded 13.8 billion U.S. dollars.

In 2010, under the influence of global economic recovery and a series of policies to stimulate economic growth in China, the economic development of the battery industry in China has shown a good performance. Although the domestic stimulus economic policy gradually withdrew and the foreign European debt crisis continued to spread, the domestic battery market grew rapidly and the foreign battery market recovered. The overall economic environment remained positive. According to the "China Battery Industry Development Study Report(2010)" issued by the China Light Industry Federation and China Light Industry Information Center, the National battery industry production and sales grew rapidly in 2010, and enterprises above designated size completed an industrial output value of 459.208 billion yuan, an increase of 49.70 % year-on-year; The industrial sales output value was 449.725 billion yuan, an increase of 52.1 % year-on-year, and the production and sales rate reached 97.93 %; The value of export deliveries was 163.097 billion yuan, up 52.91 % year-on-year, and the proportion of exports in sales reached 36.26 %.

According to the statistics of the China Battery Industry Association, in 2011, the National battery industry completed a total industrial output value of 5,645.35 billion yuan, an increase of 37.49 % year-on-year; China's battery-manufacturing industry enterprises above designated size have achieved a revenue of 536.19 billion yuan, an increase of 33.20 % year-on-year; The total profit reached 31.778 billion yuan, an increase of 11.48 % year-on-year. According to the statistics of the Ministry of Industry and Information Technology, the total industrial sales output value of the battery industry in China increased by 18.86 % year-on-year in 2012; In 2013, the accumulated revenue of the main business of battery manufacturers above designated size increased by 11.4 % year-on-year, and the total profit fell by 0.5 % year-on-year. From January to May 2014, the accumulated revenue of the main business of battery manufacturers above designated size nationwide increased by 4.8 % year-on-year, and the total profit increased by 27.1 % year-on-year.

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