26650 battery

　　Fast-charging 26650 battery help electric vehicles have good market prospects

　　In the new energy vehicle industry, technical problems such as difficulty in charging and long charging time have always been one of the obstacles to the promotion of electric vehicles. When charging facilities cannot fully meet demand, the core problem in all this is that the charging technology of electric vehicles is not up to standard and cannot meet the requirements for fast charging. Power vehicles that can meet fast charging have become an obvious demand in the industry.

　　However, new market demands will inevitably lead to the emergence of new technological innovations and products, and this is true in all walks of life.

　　The second-generation fast-charging lithium battery we released this time can shorten the charging time to 15 minutes. At the 2013 Third China (Shenzhen) Public Transport Urban Development Forum, Zheng Zhuoqun, director of the Technology Center of Weihong Power Systems Co., Ltd., introduced that the industry needs to make changes when the current common charging technology for new energy vehicles cannot meet the requirements for fast charging.

　　Advanced power battery technology

　　According to Tong Ming, general manager of Micromacro Power (Huzhou) System Co., Ltd., Micromacro Power’s first-generation fast-charging battery products have been operated on more than 900 buses for more than 60 million kilometers, and the third generation released this time has While the second-generation products still retain the characteristics of fast charging capabilities and long cycle life of more than 10,000 times, their energy density and economy have been significantly improved compared to the previous generation products, providing better options for pure electric buses in public transportation operations. Energy solutions.

　　The cycle life of a single multi-composite lithium battery cell at room temperature at 6C rate is still more than 10,000 times, which is twice that of the best lithium iron phosphate battery products in the world. After being assembled into a group, it can meet the charging rate of 4C, which means that the battery pack can be fully charged in 15 minutes. Zheng Zhuoqun introduced that the weight energy density of multi-composite 26650 battery has also reached 120Wh/kg, exceeding lithium titanate and lithium iron phosphate batteries. The discharge capacity of multi-composite 26650 battery at low temperatures (minus 20 degrees Celsius) can reach 78% of that at normal temperature, and has good low-temperature performance.

　　The launch of multi-composite lithium battery products makes up for the shortcomings of fast-charging lithium titanate batteries with low energy density and energy-type lithium iron phosphate and ternary batteries that cannot be charged quickly, providing pure electric vehicle products with the ability to truly meet the actual needs of bus operations. innovative, more feasible and more economical solutions.

　　Improvements in product performance originate from the research and development of basic raw materials. Tongming Ming told reporters that the multi-composite lithium battery uses porous composite carbon with Micromacro's patented technology as the negative electrode material. The biggest feature is that its specific surface area is revolutionary, more than 20 times that of traditional graphite, and the increased specific surface area and pores have also increased significantly. The migration of lithium ions and the number of insertion channels enable lithium ions to be inserted and extracted quickly and stably. This solves the technical bottleneck that has long hindered the rapid charging of high-energy-density graphite anode lithium battery products, and greatly extends the battery life.

　　This technology also greatly improves battery safety compared with traditional graphite negative electrode 26650 battery. The multi-component composite lithium battery pack has passed the mandatory inspection of the National Passenger Vehicle Quality Supervision and Inspection Center. The inspection test includes 9 safety tests including short circuit, overcharge, over-discharge, heavy object impact, drop, extrusion, acupuncture, height simulation, heating, etc., which fully complies with the national QC/T743-2006 Lithium-ion for Electric Vehicles Battery safety standards.

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