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 first conduction path 18, with a second current sensor 13 disposed on the second conduction path 19, so that a detection range of both current sensors 12, 13 is narrowed down by 1/2 relative to a possible detection range of an excessive current flowing on the DC power line 7, thus improving the detection accuracy. Based on a value produced by adding detection values I1, I2 of the first and second current sensors 12, 13, an excessive current is determined and an SOC is calculated, thus a sensor failure is determined on the basis of comparison of the detection values I1, I2.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。第1導通路18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、直流電力ライン7を流れる過電流を検出可能な検出領域に対して両電流センサ12,13の検出領域を1/2まで狭めて検出精度を高める。第1及び第2電流センサ12,13の検出値I1,I2を加算した値に基づき過電流の判定及びSOCの算出を行い、検出値I1,I2の比較に基づき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 |