PROBLEM TO BE SOLVED: To provide a battery state estimation device for estimating the state of a battery for driving an electric vehicle, with which it is possible to estimate the capacity retention rate of the battery for drive with high accuracy when charging it at home, etc.SOLUTION: Provided is a battery state estimation device for estimating the state of a battery for driving an electric vehicle, the battery state estimation device being characterized by comprising a charge rate change amount calculation unit 19, a charge amount calculation unit 21, a full charge amount calculation unit 23, and a capacity retention rate calculation unit 25, and by further including a repeat computation unit 27 which, with the capacity retention rate calculated by the capacity retention rate calculation unit using an SOC-OCV table 17 for initial state capacity retention rates defined as a next capacity retention rate, performs computation until the capacity retention rates are converged by repeated calculations of further next retention rates by the retention rate calculation unit using an SOC-OCV table for next capacity retention rates.SELECTED DRAWING: Figure 2
【課題】本発明の少なくとも一実施形態は、電動車両の駆動用バッテリの状態を推定するバッテリ状態推定装置において、自宅等で充電する際に精度よく駆動用バッテリの容量維持率を推定することができるバッテリ状態推定装置を提供することを目的とする。【解決手段】電動車両の駆動用バッテリの状態を推定するバッテリ状態推定装置において、SOC−OCVテーブル17と、充電率変化量算出部19と、充電量算出部21と、満充電容量算出部23と、容量維持率算出部25と、を備え、初期状態の容量維持率のSOC−OCVテーブルを用いて容量維持率算出部によって算出された容量維持率を次の容量維持率とし、次の容量維持率のSOC−OCVテーブルを用いて容量維持率算出部によってさらに次の容量維持率を算出するように繰り返して容量維持率を収束するまで演算する繰返演算部27を備えることを特徴とする。【選択図】図2
BATTERY STATE ESTIMATION DEVICE
バッテリ状態推定装置
2018-10-11
Patent
Electronic Resource
Japanese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / 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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