US university proposes not to use fast-charged methods to charge automotive battery charging research and development new charging method

　　Author ：Iflowpower – Portable Power Station Supplier

According to foreign media reports, engineers from the University of California, Riverside said that commercial fast charging stations will allow electric vehicle batteries in high temperatures, high-resistance environments, and such environments can cause battery to break, leak and lose Storage capacity. In order to solve this problem, the researchers have developed a way to charge the battery at lower temperatures, thereby reducing the risk of catastrophic damage and storage capacity loss. (: California University Riverside Division) Electrical and Computer Engineering Professor Mihriozkan and Marlanandrosemarybourns School of Mechanical Engineering, Cengizozkan, leading a group, using the fast charging pile of highway installation as the Panasonic NCR18650B cylindrical lithium in Tesla Motor Ion battery charging.

They also use a fast charging algorithm based on battery internal resistance, which interferes with the flow of electrons. The internal resistance of the battery varies with changes in temperature, charging state, battery life, etc., during the charging process, there is a problem with high internal blocking.

California University Riverside Branch Battery Team is a self-adaptive system that can learn to battery by checking the internal resistance of battery charging. When the internal resistance is used, the charging method will stop working, so that the battery does not lose charging capacity. (: California University Riverside Division) In the first 13 charging cycles, the battery storage capacity caused by the two charging technologies remain similar.

Then, fast charging techniques can cause battery capacity faster, after 40 charging cycles, the battery can only maintain a storage capacity of 60%. However, the battery is charged for the battery, and the battery can still maintain more than 80% or more when the battery is charged. Keeping 80% of the capacity has declared that the rechargeable lithium-ion battery has reached the service life and cannot be used in most uses.

Battery with fast charging techniques for charging this state after 25 charging cycles, and battery charging according to the internal resistance charging method reaches this state after 36 charging cycles. Worse, after 60 charging cycles, battery shells charged by fast charging method will break, electrodes and electrolytes will be exposed to air, and the risk of fire or explosion has been added. 60 degrees Celsius / 140 Fahrenheit high temperature will speed up the battery damage and the risk of fire / explosion, but the internal blocking charge will cause the battery temperature to be lower, eliminating damage.

At present, the researchers have applied for a patent for the adaptive internal resistance fast charging algorithm, which may authorize the battery and automakers. At the same time, California University Riverside Branch Battery Team proposes to minimize the use of commercial fast charging piles, charging before the battery is exhausted, and overcharge over. .