People who are interested in electric vehicles understand that the most common problems of this type of model include long charging time, limited mileage, usability of charging station, etc.. In order to make electric cars more popular in American consumers, the researchers of Pennsylvania State University have achieved a breakthrough, shortening the charging time of lithium-ion batteries to 10 minutes.
. The first author Yang Xiaoguang (transliteration) and his colleagues prepared the above research results into a report published in “Joe” magazine, a journal focused on sustainable energy science. It is point to point out that although there is still an obstacle to overcome some obstacles, people have long been comparable to the convenience of practical electric vehicles to be comparable to gasoline dynamic cars, which may be more close to people.
. In a household charging environment with 120 volts standard power outlets, electric vehicles are filled with electricity per hour, can support them 2 to 5 miles; and more powerful 240 volt supply sockets are charged, electric energy charged per hour Can let the vehicle drift 10 to 20 miles. At present, the charging speed of the fast charging station is much faster, and the charging can be charged for the vehicle to supply 60-80 miles of an additional endurance mileage.
. However, the rapid charging will damage the lithium-plating layer (metal lithium formed around the positive electrode), which greatly hinders the progress of rapid charging research..
According to the report written by Yang Xiaoguang and colleagues, the key to solving the above problems is to quickly heat the battery to 140 degrees (60 degrees Celsius) in 30 seconds, and maintain this temperature during charging.. Specific measures are to install a cheap nickel foil on the battery.
. The charging process in a higher temperature environment is only a short time (such as 10 minutes), and the nickel foil can prevent the formation of the battery lithium coating during this process..
The researchers found that after the above initiatives are deployed in place, even if the number of charging is up to 2500, the test battery still has a capacity of 91.7%, which is equivalent to the vehicle’s battery life to reach 500,000 miles, while the time of the vehicle is not cheering than the fuel cart. Time spent.
Despite this, this technology will be promoted to the public level and facing many obstructions.. First, heat the battery to a certain temperature and maintained a period of time.
. If the battery is overheating, they may have a downgrade, even in a very small number of cases exploded..
But if the battery temperature is too low, lithium plating phenomenon occurs.. Second, the opening of the above technology should be put into a new fast charging station, or upgrade existing charging stations.
All battery manufacturers must integrate nickel foil plating standard into their design links. Of course, in view of the rapid development of the current technology, these problems are all possible in a reasonable time.