Scientists have developed a new design of a lithium-ion battery for a car, which allows it to accumulate 400 kW of energy in 10 minutes without deteriorating performance.
One of the main problems of electric vehicles is their long charge, and against the background of the growth of their popularity, scientists began to actively look for ways to solve it. It is known that the process can be accelerated by increasing the temperature of the battery, but due to this, the anode can be covered with a metal liter, significantly reducing the service life.
However, researchers from the University of Pennsylvania found that the problem can be solved if the battery is charged at 60 ° C, and then discharged at a lower temperature. This allows not only to speed up the process, but also to avoid degradation.
To do this, they equipped the lithium-ionic device with a nickel structure, which independently heated in less than 30 seconds. During the experiments, they increased the temperature of the batteries up to 40, 49 and 60 ° C and experienced various cooling strategies to maintain a constant temperature, which coal indicators with a control sample that is permanently operating at 20 ° C.
The command found that the device previously heated to 60 ° C can withstand an extremely fast charging process for 1,700 cycles, while the control device has grown only 60 cycles. They determined that when charging in the interval between 49 and 60 ° C, lithium coating is not formed. The researchers also noticed that elevated charging temperature reduced the cooling required to maintain the initial temperature of the element.
Technology can be easily implemented in existing production, since no internal changes are required for modification, and the nickel foil increases the cost of the design by 0.47%, but saves on additional heating modules.
Recently, scientists from Skoltech offered
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