METHOD, DEVICE, AND PROGRAM FOR PREDICTING STATE OF DEGRADATION

To accurately predict the state of degradation of a secondary battery.SOLUTION: The present invention relates to a method for predicting the state of degradation which calculates a cause-by-cause degradation state 25 and predicts a degradation state 26 of a secondary battery 1 from a plurality of degradation states 25 for various different causes. The cause-by-cause degradation states 25 is calculated on the basis of a previous cause-by-cause degradation state 21 as a cause-by-cause degradation state 25 an arbitrary first time before the current cause-by-cause degradation state and a unit cause-by-cause degradation state as the degradation for one hour in consideration of a time dependency which is different according to cause of degradation and is according to a power method for the passage of time of the cause-by-cause degradation state 25 and the rate of degradation which is different by causes of degradation and is determined by the usage condition 22 at the time of prediction.SELECTED DRAWING: Figure 1 【課題】二次電池の劣化状態を精度良く予測することを目的とする。【解決手段】劣化原因毎に原因別劣化状態２５を算出し、複数の原因別劣化状態２５から二次電池１の劣化状態２６を予測する劣化状態予測方法であって、それぞれの原因別劣化状態２５は、任意の第１時間だけ前の原因別劣化状態２５である事前原因別劣化状態２１と、第１時間の間に劣化する単位原因別劣化状態とに基づいて、劣化原因によって異なり原因別劣化状態２５の経過時間に対するべき乗則に則った時間依存性と、劣化原因によって異なり予測時の使用条件２２によって決定される劣化速度とを考慮して算出される。【選択図】図１