BATTERY CONTROL DEVICE

• Main Author: YOKOTA TAKAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 20.05.2024
• Subjects: 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; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL

To provide a battery control device which can properly activate regeneration brake at the time of downhill traveling when a battery is degraded.SOLUTION: A battery control device 10 controlling discharge and charge of a battery 22 mounted on a battery electric vehicle 20 comprises the steps of: predicting vacant capacity of the battery 22 as a pocket capacity CPpt required for activation of regeneration brake at the time of downhill traveling when the battery 22 is charged by an external power source; calculating an upper limit charge rate capable of securing the pocket capacity CPpt as a corrected upper limit charge rate SOCup# based on the pocket capacity CPpt and a degradation rate SOH of the battery 22; and controlling charging from the external power source so that the charge rate SOC of the battery 22 is the corrected upper limit charge rate SOCup# or less.SELECTED DRAWING: Figure 2 【課題】バッテリが劣化しても、降坂走行時に回生ブレーキを適正に作動させることができるバッテリ制御装置を提供する。【解決手段】バッテリ電気自動車２０に搭載されたバッテリ２２の充放電を制御するバッテリ制御装置１０は、前記バッテリ２２を外部充電する際に、今後、発生する降坂走行時に回生ブレーキを作動させるために必要な前記バッテリ２２の空き容量をポケット容量ＣＰｐｔとして予測し、前記ポケット容量ＣＰｐｔと、前記バッテリ２２の劣化率ＳＯＨと、に基づいて、前記ポケット容量ＣＰｐｔが確保可能な上限充電率を、修正上限充電率ＳＯＣｕｐ＃として算出し、前記バッテリ２２の充電率ＳＯＣが前記修正上限充電率以下ＳＯＣｕｐ＃となるように前記外部充電を制御する。【選択図】図２