EV電池設計のためのトレードオフ評価手法を開発(Mapping Trade-Offs to Help Build Better EV Batteries)

2026-06-29 ミシガン大学

ミシガン大学の研究チームは、電気自動車(EV)向けリチウムイオン電池の設計において、エネルギー密度、充電速度、寿命、安全性など相反する性能要件(トレードオフ)を体系的に評価する新たな解析手法を開発した。次世代電池では、高容量化を図ると寿命や安全性が低下するなど、性能間のバランスが課題となっている。研究では、電池材料やセル設計、充放電条件に関する膨大なデータをモデル化し、各設計要素が性能へ及ぼす影響を可視化することで、用途に応じた最適な設計領域を提示した。その結果、単一性能の最大化ではなく、用途に応じた最適な性能バランスを選択することが、EV用電池の実用性向上につながることが示された。本成果は、電池開発期間の短縮や設計効率の向上に加え、航続距離、急速充電性能、耐久性を高いレベルで両立する次世代EV電池の開発を支援する技術として期待される。

<関連情報>

電気自動車用バッテリーの持続可能なライフサイクル管理のための枠組みと推進要因 Framework and drivers for sustainable life cycle management of electric vehicle batteries

Christian Hitt, Elliot Busta, Timothy J. Wallington, Hyung Chul Kim, Gregory Keoleian
Journal of Energy Storage  Available online: 16 June 2026
DOI:https://doi.org/10.1016/j.est.2026.123094

EV電池設計のためのトレードオフ評価手法を開発(Mapping Trade-Offs to Help Build Better EV Batteries)

Highlights

  • A framework was developed to guide sustainable battery management decisions.
  • Technology, market, policy, cost, behavior drivers of sustainability are identified.
  • Economic, environmental, and social trade-offs across chemistries are highlighted.
  • Battery industry stakeholder insights were leveraged to construct the framework.
  • Sustainability principles and enablers shape design and life-cycle-based solutions.

Abstract

Electric vehicle (EV) adoption is projected to raise global battery demand and pose sustainability challenges driven by the demand for critical minerals, energy-intensive and costly production, and end-of-life infrastructure requirements. A broad array of stakeholders and decision-makers are responsible for, or impacted by, battery life cycle management decisions that influence sustainability outcomes. We present a framework spanning the full battery life cycle and identify consequences and sustainability trade-offs for stakeholders. We identify 17 key drivers that determine the life cycle sustainability performance of batteries. The framework is designed to help decision-makers assess trade-offs and avoid unintended consequences across life cycle stages, stakeholders, and impact categories. Its development was informed by a critical review of the battery sustainability literature and stakeholder interviews across different sectors and fields of expertise. We highlight information transparency, infrastructure investment, systems-based policy and solutions, and multi-stakeholder collaboration as key enablers for sustainable battery life cycle management. Insights from the framework provide guidance for current and future battery management. To remain competitive, the U.S. automotive industry must manage costs as well as environmental and social impacts – this framework provides guidance across all three pillars of sustainability. The framework encourages a holistic assessment of the battery life cycle as an integral part of management decisions and reinforces the need to consider the diverse range of sustainable development goals.

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