Japanese researchers working on tech to generate electricity from inside tyres

by Autocar Pro News Desk , 26 Jul 2019


A new technology that could see tyres generate electricity whilst driving is being developed by engineers in Japan. The research is being undertaken by Falken Tyre's parent company, Sumitomo Rubber Industries, together with Professor Hiroshi Tani of Kansai University.

The team has developed a 'Energy Harvester' that takes advantage of the build up of static electricity, known as frictional charging, to produce power efficiently as the tyre turns.

Inside the Energy Harvester are two layers of rubber each covered in an electrode, along with a negatively charged film that interfaces with a positively charged film. When fixed to the inside of a conventional tyre carcass it generates electricity as the tyre deforms during rotation.

The company says the research engineers believe the Energy Harvester could lead to practical applications as a power source for sensors used in TPMS (Tyre Pressure Monitoring Systems) and other automotive devices without the need for batteries.

The concept was created as part of Sumitomo’s R&D programme to develop technologies that target improvements in safety and environmental performance. Now, the research has been selected by the Japan Science and Technology Agency, a national research and development agency as a Type FS* Seed Project under A-STEP (Adaptable and Seamless Technology Transfer Program through Target-Driven R&D). Sumitomo Rubber Industries will now advance this research with support from the Japan Science and Technology Agency.

*A programme supporting research and development projects undertaken jointly by academia and enterprise in order to perform feasibility and application studies based on the results of academic research related to technological 'seeds,' with the ultimate aim of producing new core technologies.