PROBLEM TO BE SOLVED: To accurately perform SMR welding detection.SOLUTION: A welding detection device comprises a measurement part 14c and a determination part 14d. A vehicle comprises a power source, a capacitor, a load circuit, a switch for connecting the power source and the load circuit, and a body earth of the vehicle. The measurement part 14c measures a first voltage of the capacitor which is charged by connecting the power source, the capacitor, and the body earth in series, in a state of controlling the switch in the first state. The measurement part 14c measures a second voltage of the capacitor which is charged by connecting the power source, the capacitor, and the body earth in series in a state of controlling the switch in the second state at a prescribed timing as a momentum. The determination part 14c performs welding determination of whether or not a state is a welding state in which the switch is turned on, when a voltage difference between the first and second voltages is equal to or less than a prescribed threshold, and determines that the switch is not in the welding state when the voltage difference exceeds the prescribed threshold.SELECTED DRAWING: Figure 1
【課題】SMR溶着検知を精度よく行う。【解決手段】溶着検知装置は、計測部14c、判定部14dを有する。車両は、電源、キャパシタ、負荷回路、電源と負荷回路を接続するスイッチ、車両のボディ接地を含む。計測部14cは、スイッチを第1の状態に制御した状態で、電源、キャパシタ及びボディ接地を直列接続させて充電されるキャパシタの第1の電圧を計測する。また、計測部14cは、スイッチを第2の状態に制御した状態で、所定タイミングを契機として、電源、キャパシタ及びボディ接地を直列接続させて充電されるキャパシタの第2の電圧を計測する。判定部14dは、第1の電圧及び第2の電圧の電圧差が所定閾値以下である場合、スイッチがオンでの溶着状態であるか否かの溶着判定を行い、電圧差が所定閾値を超える場合、スイッチが溶着状態でないと判定する。【選択図】図1
WELDING DETECTION DEVICE AND WELDING DETECTION METHOD
溶着検知装置及び溶着検知方法
10.08.2017
Patent
Elektronische Ressource
Japanisch
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01H Elektrische Schalter , ELECTRIC SWITCHES |
POWER SUPPLY CONTROL DEVICE, WELDING DETECTION METHOD AND RELAY WELDING DETECTION DEVICE
Europäisches Patentamt | 2018
|Europäisches Patentamt | 2018
|