26650 battery

　　Foreign universities have made breakthroughs in 26650 battery technology, which can be fully charged in 10 minutes

　　Anyone interested in electric vehicles knows that the most common problems faced by this type of vehicle include long charging times, limited driving range, charging station availability, etc. In an effort to make electric vehicles more palatable to U.S. consumers, Penn State researchers have achieved a breakthrough that reduces the charging time of lithium-ion batteries to just 10 minutes.

　　The first author Yang Xiaoguang (transliteration) and his colleagues compiled the above research results into a report and published it in "Joule" magazine, a journal focusing on sustainable energy science. While there are still some hurdles to overcome, the long-held dream of practical electric vehicles rivaling the convenience of gasoline-powered versions may be closer to reality than people think, although there are still some hurdles to overcome.

　　In a home charging environment with a standard 120-volt power outlet, an electric car can charge 2 to 5 miles of electricity per hour; while charging with a more powerful 240-volt power outlet, it can charge 2 to 5 miles of electricity per hour. Allows the vehicle to travel 10 to 20 miles.

　　Current fast charging stations charge much faster, providing a vehicle with 60-80 miles of additional range in 20 minutes. However, fast charging can cause damage to the lithium plating (the metallic lithium formed around the positive electrode of the battery), which has greatly hindered the progress of fast charging research.

　　According to a report written by Yang Xiaoguang and his colleagues, the key to solving the above problem is to quickly heat the battery to 140 degrees Fahrenheit (60 degrees Celsius) within 30 seconds and maintain this temperature during the charging process. The specific measure is to install a cheap nickel foil on the battery. The charging process only takes a short time (such as 10 minutes) in a higher temperature environment. During this process, the nickel foil can prevent the formation of lithium plating on the battery.

　　The researchers found that after the above measures were deployed, the test battery still retained 91.7% of its power even after charging up to 2,500 times, which is equivalent to a vehicle range of 500,000 miles. At the same time, the vehicle charging time is no longer than that of a fuel vehicle. It takes a long time.

　　Still, there are many obstacles to bringing this technology to the public. First, heating the battery to a certain temperature and maintaining it for a period of time can cause environmental concerns. If batteries overheat, they can degrade or even explode in rare cases. But if the battery temperature is too low, lithium plating will occur.

　　Secondly, the implementation of the above technologies requires the investment in new fast charging stations or the upgrading of existing charging stations. Eventually all battery manufacturers will have to incorporate nickel foil plating standards into their designs. Of course, given the rapid development of current technology, it is entirely possible that these problems can be solved within a reasonable time.

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