Electrostatic power generation technology for tires

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last updated：Dec 21, 2021

Successful development of battery-less tire peripheral sensors! Introducing tire internal power generation technology using static electricity.

A joint development by Sumitomo Rubber Industries, Ltd. and Kansai University has been undertaken to realize the "tire internal power generation technology." We have successfully extracted the charge generated by the friction electrification phenomenon occurring between positively and negatively charged films as electrical power within the tire. By incorporating a power control circuit, we have added the functionality to charge power from the power generation device. This enables power supply to sensors that require batteries, such as batteries. Additionally, the tire internal power generation technology could be one solution to the battery life issue of external sensor devices. 【Features】 ■ Generates power through tire rotation ■ Charges the power control circuit and confirms power supply to external sensors ■ Enables sensing without batteries ■ Ensures durability to withstand harsh environments within the tire ■ Enables power supply to sensors that require batteries *For more details, please refer to the PDF document or feel free to contact us.

Related Link - https://www.srigroup.co.jp/newsrelease/2021/sri/20…

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【Other Features】 ■ Successfully extracted power from the movement of charges generated by the friction charging phenomenon between positively and negatively charged films within the tire. ■ Optimized the structure and materials related to friction charging to maximize power generation. ■ Added a function to charge power from the power generation device by incorporating a power control circuit. ■ Developed a system that charges the power control circuit from the power generation device to supply and operate external sensors. ■ Confirmed a power generation of over 800μW at a tire speed of 50 km/h, successfully activating external sensors and achieving continuous BLE communication. ■ The tire-based power generation technology could be one solution to battery life issues in external sensor devices. *For more details, please refer to the PDF document or feel free to contact us.