City-Level Potentialof Echelon Utilization of ElectricVehicle Batteries to Meet Wind and Solar Storage Demand in China
中国における風力・太陽光発電の貯蔵需要を満たすための電気自動車バッテリーのカスケード利用の都市レベルの可能性 (AI 翻訳)
Yihao Guo, Xin Chen (14149), Tong Zhang (103827), Zhi Cao (614116)
🤖 gxceed AI 要約
日本語
本研究は、中国の都市レベルでEV用バッテリーの二次利用（カスケード利用）が風力・太陽光発電の大規模貯蔵需要にどの程度貢献できるかを2010～2060年について定量評価した。高電化シナリオでは、2040年代半ばまでに二次利用バッテリーで全国の再エネ貯蔵需要を満たせ、リチウム・コバルト消費を50％以上削減可能と示した。
English
This study develops a city-level modeling framework to quantify the potential of echelon utilization of retired EV batteries for stationary renewable energy storage in China from 2010 to 2060. Under a high electrification scenario, second-life batteries can fully satisfy national wind and solar storage requirements by the mid-2040s, reducing lithium and cobalt demand by over 50% compared to new batteries alone.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本でもEVバッテリーの二次利用や再生可能エネルギー貯蔵の政策が進む中、本論文の都市別アプローチは日本の地域別需給分析や資源循環戦略の参考になる。
In the global GX context
This paper provides a city-level, long-term assessment of retired EV battery reuse for renewable integration, offering a transferable methodology for countries with growing EV fleets and renewable targets.
👥 読者別の含意
🔬研究者:The integrated modeling framework linking vehicle stocks, battery degradation, and storage demand is novel and can be applied or adapted to other regions.
🏢実務担当者:Battery recyclers and energy storage developers can use the quantification to plan investments in second-life battery systems and material recovery.
🏛政策担当者:The results highlight the importance of coordinating EV adoption with battery reuse policies to enhance resource security and renewable integration.
📄 Abstract（原文）
The rapid expansion of wind and photovoltaic power is intensifying demand for large-scale electricity storage, while the transition to electric vehicles (EVs) is accelerating consumption of critical materials. Retired EV batteries are increasingly considered for echelon utilization in stationary energy storage, yet their long-term system-level potential remains poorly quantified, particularly at fine spatial resolution. Here we develop an integrated, city-level modeling framework that couples vehicle stock projections, climate-sensitive battery degradation modeling, renewable energy storage demand estimation, and dynamic material flow analysis to assess the role of echelon utilization of retired EV batteries in China from 2010 to 2060. We show that under conservative EV penetration pathways, second-life batteries remain insufficient to meet renewable storage demand. Yet, under a high electrification scenario aligned with China’s decarbonization goals, echelon-utilized batteries can fully satisfy national wind and solar storage requirements by the mid-2040s, despite persistent regional disparities. Large-scale echelon utilization substantially reduces cumulative demand for critical materials, lowering lithium and cobalt consumption by more than 50% compared with reliance on new batteries alone. These results demonstrate that reuse of EV batteries can enable renewable energy integration while enhancing resource security, underscoring the importance of coordinating transport electrification, energy storage deployment, and circular economy strategies.
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