PROBLEM TO BE SOLVED: To provide a charge rate estimation method with which it is possible to improve the accuracy of estimating a charge rate even more.SOLUTION: Provided is a method for estimating the charge rate of a battery, there being a significant hysteresis occurring in part of a charge rate range of the battery, that the open-circuit voltage value relative to its charge rage after a continuous charge and after a continuous discharge differs by a given amount or more, the battery having a hysteresis area that represents a charge rate range where the significant hysteresis occurs and a non-hysteresis area that represents a charge rate range where the significant hysteresis does not occur, the method comprising: a charge rate estimation step for estimating a control charge rate used for control on the basis of a current-derived charge rate estimated by referring to an integral current value obtained by integration of detected current values of the battery and a voltage-derived charge rate estimated by referring to the detected voltage value of the battery; and a correction step for correcting the current-derived charge rate on the basis of the voltage-derived charge rate estimated when the charge rate of the battery is in the non-hysteresis area.SELECTED DRAWING: Figure 8
【課題】充電率の推定精度をより向上できる充電率推定方法を提供する。【解決手段】電池の充電率推定方法であって、前記電池は、その充電率に対する開放電圧値が、充電継続後と放電継続後とで一定以上異なる有意なヒステリシスが一部の充電率範囲で生じており、前記有意なヒステリシスが生じる充電率範囲であるヒス領域と前記有意なヒステリシスが生じない充電率範囲であるノンヒス領域とを有しており、前記電池の検出電流値を積算した電流積算値を参照して推定された充電率である電流由来充電率と、前記電池の検出電圧値を参照して推定された充電率である電圧由来充電率と、に基づいて、制御に用いる制御充電率を推定する充電率推定ステップと、前記電池の充電率が前記ノンヒス領域内にあるときに推定された前記電圧由来充電率に基づいて、前記電流由来充電率を補正する補正ステップと、を備える。【選択図】図8
CHARGE RATE ESTIMATION METHOD AND ONBOARD BATTERY SYSTEM
充電率推定方法および車載の電池システム
2018-11-22
Patent
Elektronische Ressource
Japanisch
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / 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 |