PROBLEM TO BE SOLVED: To provide an electric-vehicular current monitor apparatus provided with an excessive current monitor function, an SOC calculation function and a system abnormality detection function, at a low system cost.SOLUTION: Bus bars 16, 17 are inserted into a DC power line 7 that connects a motor-driving inverter 6 to a high-voltage battery 3, thus forming parallel first and second conduction paths 18, 19, and their resistance ratio is set at 1:1, thus applying the same current. A first current sensor 12 is disposed on the DC power line 7, with a second current sensor 13 disposed on the second conduction path 19, and the first current sensor is set at a wide detection zone capable of detecting an excessive current, with a detection zone of the second current sensor 13 narrow down to 1/2 of that of the first current sensor 12, thus improving detection accuracy. Based on a detection value of the first current sensor 12, an excessive current is determined; based on 2 times of a detection value of the second current sensor 13, an SOC of a high-voltage battery 3 is calculated; and based on a comparison between 2 times of the detection value and the detection value of the first current sensor 12, a sensor failure is determined.SELECTED DRAWING: Figure 2
【課題】安価なシステムコストにより過電流の監視機能、SOCの算出機能及びシステム異常の検出機能を兼ね備えた電動車両の電流監視装置を提供する。【解決手段】高圧バッテリ3とモータ駆動用のインバータ6とを接続する直流電力ライン7にバスバー16,17を介装して並列関係の第1及び第2導通路18,19を形成し、その抵抗比を1:1として同一電流を流す。直流電力ライン7上に第1電流センサ12を、第2導通路19上に第2電流センサ13を配設し、第1電流センサ12を過電流の検出が可能な広い検出領域に設定し、第2電流センサ13の検出領域を第1電流センサ12の1/2まで狭めて検出精度を高める。第1電流センサ12の検出値に基づき過電流を判定し、第2電流センサ13の検出値の2倍に基づき高圧バッテリ3のSOCを算出すると共に、検出値の2倍と第1電流センサ12の検出値とを比較してセンサ故障を判定する。【選択図】図2
ELECTRIC-VEHICULAR CURRENT MONITOR APPARATUS
電動車両の電流監視装置
2018-11-01
Patent
Electronic Resource
Japanese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |