New battery technology extends life span and heat resistance

According to Huawei, the Watt lab, an organization affiliated to the institute's Central Research Institute, has announced a major breakthrough in the study of graphite-based lithium-ion battery technology . This material helps to extend battery life and increase heat resistance.

Accordingly, the new graphene-based heat-resistant technology allows lithium-ion batteries to maintain their function in temperatures as high as 60 degrees Celsius, which is 10 degrees Celsius above the thermal limit. current level. Longevity of graphite-based li-ion batteries can also double as conventional lithium batteries.

Graphene battery technology is not new, but Huawei has developed it to outperform the previous record by 10 degrees Celsius.

Dr. Yangxing Li, Scientific Director at Watt Laboratories, points out: There are 3 important technologies that make this breakthrough. Specifically, a special additive in the electrolyte can remove water and prevent the electrolyte from evaporating at high temperatures. In addition, a material called NMC has been adapted to use and improve the thermal stability of the cathode. Finally, graphene material helps to cool more effectively for lithium batteries.

"We have performed charging and discharging experiments in a high temperature environment." Experiments show that, when the operating parameters are the same, the lithium-ion battery is 5 degrees C cooler than the battery. Graphene batteries remain more than 70% of their capacity after being charged 2,000 times at 60 degrees Celsius, and only less than 13% of their capacity after being kept in a temperature environment. 60 degrees Celsius for 200 days, " Li said.

According to Huawei, the results of their research will re-shape the storage system of mobile base station (BTS). In high-temperature areas, outdoor lithium-ion-powered BTS stations may have a service life of more than four years. These batteries also ensure that electric vehicles run longer distances on each charge at higher temperatures. They can also ensure safe operation of unmanned aerial vehicles - which often generate significant amounts of heat.

Earlier this week, at the 56th annual symposium on battery technology, which will be held in Japan in 2015, Watt Labs unveiled a fast charging technology that will charge 48% of a 3,000mAh battery in just 5 years. minute. Huawei has commercialized the fast rechargeable battery and will use it in a super-fast charging smartphone, scheduled for release in late December.