BATTERY MANAGEMENT SYSTEM

To provide a battery management system capable of reflecting a situation in which a secondary battery is placed and capable of improving accuracy of estimating a degree of deterioration, with regard to estimation of battery temperature data of the secondary battery during a parking period.SOLUTION:...

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Bibliographische Detailangaben
Hauptverfasser:	NAGASHIMA SHO, YAMAMOTO HIROYOSHI, SOKI TAKAHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERATION INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTEDFOR SPECIFIC APPLICATION FIELDS MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PERFORMING OPERATIONS PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY TESTING TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	To provide a battery management system capable of reflecting a situation in which a secondary battery is placed and capable of improving accuracy of estimating a degree of deterioration, with regard to estimation of battery temperature data of the secondary battery during a parking period.SOLUTION: A battery management system 1 comprises: a secondary battery 25; a battery temperature detection unit 28; an environmental temperature detection unit 29; and a deterioration estimation unit 51b. The deterioration estimation unit 51b estimates a degree of deterioration of the secondary battery, using information related to a battery temperature of the secondary battery in a target period including an operation period and a parking period. The deterioration estimation unit has a temperature estimation unit 51c, and estimates the degree of deterioration of the secondary battery in the target period using the battery temperature in the operation period detected by the battery temperature detection unit 28 and the battery temperature in the parking period estimated by the temperature estimation unit 51c. The temperature estimation unit 51c estimates the battery temperature of the secondary battery in the parking period using: the battery temperature detected by the battery temperature detection unit 28 in the operation period; an environmental temperature in the parking period; and heat resistance characteristics of the secondary battery.SELECTED DRAWING: Figure 6 【課題】二次電池における駐車期間の電池温度データの推定に関して、二次電池がおかれている状況を反映すると共に、劣化度の推定精度の向上を図ることができる電池管理システムを提供する。【解決手段】電池管理システム１は、二次電池２５、電池温度センサ２８、環境温度センサ２９、劣化推定部５１ｂを有している。劣化推定部５１ｂは、運行期間及び駐車期間を含む履歴対象期間における二次電池の電池温度に関する情報を用いて、二次電池の劣化度を推定する。劣化推定部は温度推定部５１ｃを有し、電池温度センサ２８で検出された運行期間における電池温度と、温度推定部５１ｃで推定された駐車期間における電池温度を用いて、対象期間における二次電池の劣化度を推定する。温度推定部５１ｃは、運行期間にて電池温度センサ２８で検出された電池温度と、駐車期間における環境温度と、二次電池の熱抵抗特性を用いて、駐車期間における電池温度を推定する。【選択図】図６