CHARGING DEVICE FOR SECONDARY BATTERY UNIT

• Main Authors: ENDO EIJI, TARIKI AKIHIRO, INOUE MASAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 26.09.2019
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

To provide a charging device for a secondary battery unit for charging efficiently the secondary battery unit composed of a plurality of secondary batteries.SOLUTION: The charging device for a secondary battery unit for charging a battery pack 20 configured by connecting a plurality of secondary batteries 4 in series comprises: a charge/discharge control unit 6 for charging and discharging the plurality of secondary batteries 4 independently; a voltage sensor 7 for measuring the voltage of each of the plurality of secondary batteries 4; a charge capacity calculation unit 16 for estimating the chargeable capacity of the plurality of secondary batteries 4; a charge/discharge command unit 17 that, when charging the secondary battery unit 20, estimates the chargeable capacity of each of the plurality of secondary batteries 4 by the charge capacity calculation unit 16 and charges and discharges the secondary batteries 4 by the charge/discharge control unit 6 so as to reduce the difference in chargeable capacity of the plurality of secondary batteries 4.SELECTED DRAWING: Figure 4 【課題】複数の二次電池で構成される二次電池ユニットを効率よく充電する二次電池ユニットの充電装置を提供する。【解決手段】複数の二次電池４を直列に接続して構成された電池パック２０を充電する二次電池ユニットの充電装置であって、複数の二次電池４を独立して充放電させる充放電制御部６と、複数の二次電池４の夫々の電圧を測定する電圧センサ７と、複数の二次電池４の充電可能容量を推定する充電容量算出部１６と、二次電池ユニット２０を充電する際に、充電容量算出部１６により複数の二次電池４の充電可能容量を夫々推定し、複数の二次電池４の充電可能容量の差を減少させるように充放電制御部６によって二次電池４を充放電する充放電指令部１７と、を備える。【選択図】図４