NiMH No.7 batteries

　　A new direction in the research and development of NiMH No.7 batteries powered by water is expected to be mass-produced in three to five years

　　Lithium batteries have another research direction. Wu Yuping, a professor at the New Energy and Materials Laboratory of Fudan University, said that simulated batteries have been made using hydrolithium batteries, but the capacity is still very small.

　　Generally, the battery capacity of smartphones is 1,000 mAh. The current NiMH No.7 batteries developed are only a few mAh and are still in the laboratory research and development stage. However, Wu Yuping pointed out that if companies are willing to invest, mass production is expected in three to five years.

　　According to reports, the research team led by Wu Yuping used a composite film to coat lithium metal, placed it in an aqueous solution with a neutral pH value, and assembled it with the traditional cathode material in NiMH No.7 batteries to create a battery with an average charging voltage of 4.2V. A new type of water lithium battery with a discharge voltage of 4.0V.

　　Hydrolithium battery is one of the frontiers and directions of current lithium battery research and development. The core issue is how to prevent lithium ions and water from reacting at low potential. Ceramic separators have become the key to technology. Theoretically, hydrolithium batteries have high energy density and energy efficiency of up to 95%. Electric vehicles equipped with hydrolithium batteries can travel up to 400 kilometers when fully charged, and the charging time is very short. In addition, NiMH No.7 batteries are less likely to get hot during use and have higher safety performance.

　　It is understood that Fudan University began to explore the field of hydrolithium batteries in 2005, and made significant progress in 2007. Its research results and scientific research level are in the world's leading position.

　　Analysts believe that this technology increases energy density and is expected to solve the current problems of high battery cost, short battery life, and long charging time for electric vehicles. However, the research and development of this technology has only achieved a breakthrough in principle and has been verified in the laboratory. Moreover, the battery capacity currently developed is too small. Only the successful development of large-capacity batteries will be of substantial significance.

　　According to news from the website of the Ministry of Science and Technology in early July, a major breakthrough has been made in the technological development of functional separators for high-safety power batteries supported by the National High-Tech Research and Development Program (863 Program), jointly undertaken by Xiamen University and AVIC Lithium Battery (Luoyang) Co., Ltd. .

　　AVIC Lithium Battery is a subsidiary of Chengdu Aircraft Integration Co., Ltd. It began to invest in the construction of an industrialization test line for ceramic functional diaphragm technology in early 2012, with a total investment of 10 million yuan. As of June 2013, the pilot line has been initially built, and relevant formula solidification, slurry mixing, coating, and cutting process technology development have been completed, forming an annual production capacity of 3 million square meters of ceramic functional separators. On this basis, the design, trial production and testing of ceramic diaphragm batteries have been carried out. Currently, 4 functional diaphragm products of different specifications have been developed, and a certain series of products has been put into use in a variety of metal shell batteries. AVIC Lithium Battery plans to use self-produced functional separators for its own battery production to improve battery safety performance.

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