To accurately estimate a deterioration state of a battery even when a sufficient number of sampling values of the battery voltage in the initial period of a suspension period is not available in a technology for estimating the deterioration state of the battery using voltage characteristics in the suspension period after charge/discharge of the battery.SOLUTION: A battery state estimation device identifies a baseline voltage of a battery voltage in a period after a predetermined time elapses from the start of a suspension period, estimates a time derivative of the battery voltage within the predetermined time according to a difference between the baseline voltage and the battery voltage, and estimates a deterioration state of the battery using the time derivative.SELECTED DRAWING: Figure 1
【課題】本発明は、電池の充放電後の休止期間における電圧特性を用いて電池の劣化状態を推定する技術において、休止期間初期における電池電圧のサンプリング値を十分な個数得られない場合であっても、電池の劣化状態を精度よく推定することを目的とする。【解決手段】本発明に係る電池状態推定装置は、休止期間が開始してから所定時間経過後の期間における電池電圧のベースライン電圧を特定し、前記ベースライン電圧と前記電池電圧との間の差分にしたがって、前記所定時間内の前記電池電圧の時間微分を推定し、前記時間微分を用いて電池の劣化状態を推定する。【選択図】図1
BATTERY STATE ESTIMATION DEVICE, BATTERY SYSTEM, AND BATTERY STATE ESTIMATION METHOD
電池状態推定装置、電池システム、電池状態推定方法
2023-09-29
Patent
Electronic Resource
Japanese
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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