Toyota and Mazda Join Forces to Pioneer Grid-Scale Battery Storage Solutions with Used EV Batteries
TOKYO, JAPAN – August 21, 2025 – Toyota Motor Corporation and Mazda Motor Corporation have announced the commencement of a groundbreaking demonstration project focused on building a robust battery ecosystem, leveraging used electric vehicle (EV) batteries for grid-scale energy storage. This initiative, detailed in a recent announcement, marks a significant step towards sustainable energy management and the circular economy within the automotive industry.
The collaborative project aims to explore the potential of second-life EV batteries, a crucial element in maximizing the value of these high-capacity energy storage units beyond their initial automotive application. By repurposing batteries that have reached the end of their service life in vehicles, Toyota and Mazda intend to create an environmentally conscious and economically viable solution for stabilizing power grids and supporting renewable energy sources.
The core of the demonstration involves the development of a “sweep” or grid-scale stationary storage system. This system will utilize the capacity of used EV batteries to store surplus electricity generated from renewable sources, such as solar and wind power, during periods of low demand. Subsequently, this stored energy can be discharged to meet peak demand, thereby enhancing grid stability and reducing reliance on fossil fuel-based power generation.
This pioneering effort aligns with the growing global imperative to address climate change and transition towards cleaner energy solutions. The automotive sector, at the forefront of electrification, has a unique opportunity to contribute to this transition by managing the lifecycle of its most critical components, namely batteries.
Toyota and Mazda’s joint endeavor underscores a shared commitment to innovation and sustainability. By pooling their expertise and resources, the two Japanese automakers are poised to make a substantial contribution to the development of advanced energy storage technologies. The success of this demonstration project could pave the way for broader adoption of similar systems, fostering a more resilient and sustainable energy infrastructure for the future.
Further details regarding the technical specifications of the sweep storage system and the projected timelines for the demonstration will likely be released as the project progresses. This initiative by Toyota and Mazda represents a forward-thinking approach to battery management, promising to unlock new value streams while contributing to a greener planet.
トヨタとマツダ、電池エコシステムの構築に向け、車載用電池を活用したスイープ蓄電システムの実証実験を開始
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トヨタ自動車 published ‘トヨタとマツダ、電池エコシステムの構築に向け、車載用電池を活用したスイープ蓄電システムの実証実験を開始’ at 2025-08-21 04:30. Please write a detailed article about this news in a polite tone with relevant information. Please reply in English with the article only.