Development of dynamic models for lithium-ion battery = Contribution to battery control technology during load fluctuations =

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04031
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21010:Power engineering-related
• Research Institution: Kanazawa Institute of Technology
• Principal Investigator: Kono Akihiko 金沢工業大学, 工学部, 教授 (40597689)
• Co-Investigator(Kenkyū-buntansha): 藤田 洋司 金沢工業大学, 工学部, 教授 (40720222) ; 漆畑 広明 金沢工業大学, 電気・光・エネルギー応用研究センター, 教授 (40723367)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: リチウムイオン電池 / モデル化 / 充放電シミュレーション

Outline of Final Research Achievements

In in-vehicle applications of lithium-ion batteries (LIBs), such as electric vehicles and hybrid electric vehicles, large-current discharge may be required during rapid vehicle acceleration. However, as large-current charging/discharging is a special type of use, it is difficult to predict the output of LIBs, and analyses have conventionally been carried out on a demonstration test basis. In this study, a simulation model for output prediction was developed and the technology for precise experimental measurement for the characteristics of LIBs was upgraded, with the aim of forming the basic technology for theoretically predicting the output of LIBs during large-current charging/discharging.

Free Research Field

蓄電デバイス工学

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した出力予測シミュレーションモデルでは，LIBの出力電圧を正確に予測できるとともに，急加速時を除く常用走行負荷レベルでのLIBの温度も予測することができる。さらに，開発モデルでは，LIB内部の計測不可能な化学反応の様子も計算により可視化することが可能である。したがって，開発モデルは，車載電池パックの設計や充放電制御設計，LIBの劣化の原因解析等に活用でき，車載用途でLIBを賢く効率的に使いこなすためのツールとして活用が期待できる。