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The key to reducing energy storage costs lies in solving the problems of energy storage battery safety and cycle life. To well-off pointed out that the breakthrough of these technologies is the premise of energy storage to achieve industrialization, but the battery technology may still need to mature for many years, pessimistic to see more than ten years.
Zhangbei demonstration project using lithium battery technology can represent the future direction of energy storage technology is still controversial. Yang Yunsheng, a fellow of the Chinese Academy of Engineering, believes that although lithium ion batteries have the advantages of high specific energy, high specific power, high energy conversion efficiency and long cycle life, the current price is higher and, more importantly, the safety is still poor. However, For the power system is the most important safety. He introduced that China Southern Power Grid's demonstration project of lithium-ion batteries smoked 22 times.
A wide range of energy storage battery technology, according to incomplete statistics, according to different needs of energy storage has 12 different technology routes. It is understood that Zhangbei 20MW energy storage demonstration project in addition to using 14 megawatts of lithium-ion battery technology, there are 2MW flow battery system, and the remaining 4MW of energy storage using what kind of battery technology, the current national network has not yet been conclusive . It is reported that 4MW of energy storage was originally left to Japan's sodium-sulfur battery technology, the technology accounted for more than 65% of global energy storage applications. However, according to Yang Yu-sheng introduction, sodium-sulfur batteries, although with high specific energy, high conversion rate, long life advantages, but not safe, the use of sodium-sulfur battery technology in Japan stored energy station in 2011 twice fire.
"Which energy storage technology is not the key." To well-to-do, Zhangbei energy storage demonstration project aims to provide storage companies with the future direction of development, that is, high safety and long life.
There are not many related domestic companies currently engaged in energy storage. According to Yu Zhenhua introduction, and energy storage related businesses include a variety of battery manufacturers, control inverter manufacturers, application solution providers, engineering companies, the current lead-acid battery manufacturers, lithium battery manufacturers, inverter manufacturers and control of some key materials Manufacturers are relatively mature, in addition to other energy storage technology has not yet formed the scale.
Due to the lack of core raw materials research and development technology, the domestic battery companies are mainly in the processing stage. According to industry sources engaged in lithium, due to the lack of domestic scale of energy storage, the domestic battery companies in the procurement of raw materials upstream can not form a bargaining power, so the battery core raw material prices much higher than foreign counterparts, and finally only through the purchase of domestic parts to Reduce the price of energy storage system.
To well-to-do, most domestic battery companies start from the OEM, even if the scale of energy storage is difficult to really benefit. To open downstream space and improve bargaining power, R & D investment needs to be increased in the direction of high safety, long life and low cost, rather than building more product lines. The current global energy storage industry has just started, domestic enterprises involved at this stage is not too late.
Wuxi Huanawell Metal Manufacturing Co., Ltd. , https://www.hnwmetal.com