While Tesla’s technology and overcharging network have allowed electric car users to enjoy a convenient green ride, the biggest short board in the EV industry is still reflected in the power battery. The good news is that chemical engineers at Pennsylvania State University have just introduced their new EV-powered battery prototype. By simply heating it to 140 degrees F (60 degrees C) and then cooling quickly to ambient temperature, it can be recharged in 10 minutes.
(Photo from: Chao-Yang Wang / Penn State)
It is reported that the current lithium-ion battery for smartphones, laptops, cars and trucks and other fields have been widely used. But over time, the battery will encounter a series of problems, especially the formation of branches that can cause the cell to break.
On the other hand, the ambient temperature when the battery is charged is also important. If too cold, lithium ions will be spiked on the battery prototype (also known as Lithium Plating / lithium plating), causing the battery to degrade and increase the risk of use.
While charging at higher temperatures is more effective, there are also concerns about battery degradation. Chao-Yang Wang, a professor of chemical and material engineering science at Pennsylvania State University, says:
Operating at extreme temperatures of 60 degrees C is strictly prohibited by the battery industry. This not only poses a risk to the material, but also significantly reduces the life of the battery. The good news is that they’ve found a new way to charge hot temperatures fast.
This new, designed EV-powered battery prototype can be heated in just 10 minutes to reach 60 degrees C (140 degrees F) and then cool down to ambient temperature.
Study drawings (from: Joule)
It is achieved by a thin nickel, with one end of the foil connected to the negative alt and the other extending beyond the battery, forming a third end. The electrons flow through the foil to heat the battery in as little as 30 seconds.
For subsequent cooling, the team also thought of a number of ways. This includes a fan that charges and cools quickly in temperatures ranging from 49 to 60 degrees C (120 to 140 degrees F) to avoid lithium plating.
As a result, it is able to quickly charge and discharge in 1700 cycles. In contrast, a regular EV battery can only be heated to 20 degrees C (68 degrees F) for 60 cycles.
They proved that they can recharge electric vehicles for 200 to 300 miles (320 to 480 kilometers) in 10 minutes and maintain 2,500 charging cycles, equivalent to 500,000 miles (800,000 kilometers), Wang said.
However, much remains to be done before it can be put into practical use, such as determining that the battery is fully scalable and even further shortening the time required for high-temperature fast charging. Details of the study have been published in the recently published journal Joule.