BATTERY SYSTEM

To accurately calculate full charge capacity of a battery.SOLUTION: A battery pack 40 comprises a battery ECU 43 for calculating full charge capacity of a battery 41 when the battery 41 is being charged with fixed current. The battery ECU 43 calculates the full charge capacity of the battery 41 on t...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	UCHIDA YOSHIHIRO, NAGAI HIROYOSHI, HAMAGUCHI HIROSHI, KUZUHA MITSUHIRO, ONISHI KENTA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TESTING
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	To accurately calculate full charge capacity of a battery.SOLUTION: A battery pack 40 comprises a battery ECU 43 for calculating full charge capacity of a battery 41 when the battery 41 is being charged with fixed current. The battery ECU 43 calculates the full charge capacity of the battery 41 on the basis of an integrated value of current detected by a current sensor 422 in a period in which voltage detected by a voltage sensor 421 rises from lower limit voltage to upper limit voltage in a CCV section corresponding to a predetermined OCV section after a charging time with the fixed current of the battery 41 exceeds a predetermined time. In the OCV section, a variation in a ratio of an OCV variation with respect to the battery 41's SOC following deterioration of the battery 41 is within a predetermined amount.SELECTED DRAWING: Figure 4 【課題】電池の満充電容量を高精度に算出する。【解決手段】電池パック４０は、バッテリ４１が一定電流で充電されている場合にバッテリ４１の満充電容量を算出する電池ＥＣＵ４３とを備える。電池ＥＣＵ４３は、バッテリ４１が一定電流での充電時間が所定時間を超えた後に、電圧センサ４２１により検出される電圧が所定のＯＣＶ区間に対応するＣＣＶ区間の下限電圧から上限電圧まで上昇する期間中に電流センサ４２２により検出される電流の積算値に基づいて、バッテリ４１の満充電容量を算出する。上記ＯＣＶ区間は、バッテリ４１のＳＯＣに対するＯＣＶの変化の割合のバッテリ４１の劣化に伴う変化が所定量以内に収まる区間である。【選択図】図４