BATTERY CONTROL DEVICE OF ELECTRIC VEHICLE

• Main Author: MIZUI TOSHIFUMI
• Format: Patent
• Language: English; Japanese
• Published: 07.07.2016
• Subjects: 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; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To provide a battery control device of an electric vehicle using only a battery as a driving source, that can prevent unnecessary stopping of the electric vehicle during travelling.SOLUTION: A battery control device of an electric vehicle using only a battery 1 as a driving source and driving a motor 2 to travel, is constituted of: a high-voltage circuit C connecting the battery 1 and the motor 2; a main contactor 3 switching between connection and cut-off of the high-voltage circuit C; voltage sensors 6l-6n detecting voltages of plural battery cells 1l-1n that constitute the battery 1; and a battery management unit 4 cutting off the high-voltage circuit C by the main contactor 3 when the cell voltage detected by the voltage detection sensors 6l-6n is higher than an overvoltage detection threshold X for detecting overcharge of the battery cells 1l-1n. The overvoltage detection threshold X is set to a value larger than a limp-home mode transition determining threshold Y and a full charge threshold Z.SELECTED DRAWING: Figure 1 【課題】バッテリのみを駆動源とする電気自動車の、走行中における不要な停車を防止することを可能とした電動車両のバッテリ制御装置を提供する。【解決手段】バッテリ１のみを動力源としてモータ２を駆動し走行する電動車両のバッテリ制御装置を、バッテリ１とモータ２との間を接続する高電圧回路Ｃと、高電圧回路Ｃの接続と遮断を切り替えるメインコンタクタ３と、バッテリ１を構成する複数の電池セル１１〜１ｎの電圧を検出する電圧センサ６１〜６ｎと、電圧検出センサ６１〜６ｎが検出したセル電圧が電池セル１１〜１ｎの過充電を検出するための過電圧検出しきい値Ｘよりも大きい場合に、メインコンタクタ３により高電圧回路Ｃを遮断するバッテリマネジメントユニット４とから構成し、過電圧検出しきい値Ｘを、リンプホームモード移行判定しきい値Ｙおよび満充電しきい値Ｚよりも大きい値に設定した。【選択図】図１