To enable the current characteristic value of a battery to be estimated with good accuracy, even when there is a large deviation between the battery temperature at previous degradation determination time and the current battery temperature.SOLUTION: Hereunder, a characteristic value D corresponding to a temperature T which a battery the degradation level of which is equivalent to a prescribed first reference point of time tb has, is defined as a first reference value Db, and a characteristic value D corresponding to a temperature T which a battery the degradation level of which is equivalent to a second reference point of time te following the first reference point of time tb has, is defined as a second reference value De. A detection unit detects degradation information α that indicates the degradation state of the battery, on the basis of a characteristic value D1 at a prescribed first point of time t1 and both reference values Db, De at a battery temperature T1 at the first point of time t1. An estimation unit estimates a characteristic value D2 at a second point of time t2 on the basis of the detected degradation information α and the temperature T2 of a battery 10 at a prescribed second point of time t2 following the first point of time t1.SELECTED DRAWING: Figure 3
【課題】前回の劣化判定時の電池の温度と、現在の電池の温度との乖離が大きくても、現在の電池の特性値を精度よく推定できるようにする。【解決手段】以下、所定の第1基準時点tb相当の劣化の電池が有する、温度Tに応じた特性値Dを、第1基準値Dbとし、第1基準時点tbよりも後の第2基準時点te相当の劣化の電池が有する、温度Tに応じた特性値Dを、第2基準値Deとする。 検出部は、所定の第1時点t1における特性値D1と、第1時点t1での電池の温度T1における両基準値Db,Deとに基づいて、電池の劣化状態を示す情報である劣化情報αを検出する。推定部は、検出された劣化情報αと、第1時点t1よりも後の所定の第2時点t2での電池10の温度T2とに基づいて、第2時点t2における特性値D2を推定する。【選択図】図3
BATTERY CHARACTERISTIC DETECTOR
電池特性検知装置
2020-10-08
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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