Scientist Wins European Inventor Award 2023 for Safer Lithium-ion Battery Technology

The European Patent Office (EPO) has revealed that Chinese scientist Kai Wu and his team are winners in the ‘Non-EPO countries’ category of the European Inventor Award 2023. Out of more than 600 candidates, Wu and his team were recognized for their development of a Lithium-ion battery technology with a special top cover that helps prevent battery safety issues. This invention is particularly important for ensuring the safety of vehicles that use lithium-ion (Li-ion) batteries containing a flammable electrolyte.

 

 

 

“It is a great honour to win such a prestigious award, which will shine a path forward to further innovation efforts for me and CATL. What is more, electric vehicles powered by our advanced and safe batteries are enabling more people to embrace a sustainable lifestyle, contributing to the global energy transition. I hope that young inventors around the world adhere to the philosophy of learning more, doing more and asking more, to develop more innovations for the benefit of mankind,” says Kai Wu.

Safety Mechanism

To address the risk of overcharging Li-ion batteries, Wu and his team developed a safety short circuit device (SSD) that is integrated into the top cover of the battery cell. They conducted systematic research on gas and heat generation patterns that lead to battery failure. The SSD is triggered by gas pressure inside the cell caused by overcharging, and it stops the battery from charging, thus eliminating the risk of battery failure due to overcharging.

Li-ion batteries are considered more sustainable due to their lighter weight, faster charging capabilities, and lower heat generation, which ultimately contribute to cleaner energy. However, overcharging Li-ion batteries has been a longstanding issue in the car industry. Wu and his team successfully provided a solution to a leading car manufacturer in just two and a half years.

According to Wu, lithium-ion battery technology has broader applications and development potential, benefiting markets focused on reducing carbon emissions and pursuing smart development. Lithium-ion batteries offer extensive possibilities for use and growth in the energy storage industry.

Wu is the Chief Scientist and Co-president of CATL and the Co-president of the CATL Future Energy Research Institute. He began his career as a lecturer before moving into industry to work on magnetic recording. In 2002, he accepted a post as a technical director of a company that manufactures lithium batteries. Wu joined CATL in 2012 and has been a key figure in the company’s success.