| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Outline of Final Research Achievements |
A prediction model for capacity degradation of Lithium-ion secondary battery (LiB) under practical use conditions was developed based on two degradation mechanisms, which are cycle stress and calendar stress, and their interaction.
Multiple physical and chemical reactions in the LiBs that contribute to the capacity degradation were observed with the experiment. By modeling the capacity degradation with the power law as the fixed effects and modeling the individual variations as the random effects, the linear mixed effect model can be applied to the prediction obtaining a highly accurate prediction.
Proposed model can give the highly accurate predictions corresponding to changes in use conditions under long-term usages.
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