A battery includes an output terminal, an electric storage device, a relay connected to the output terminal and the electric storage device, and a monitoring apparatus including a detector and a controller, the detector being configured to detect a variation value corresponding to an amount of charge of the electric storage device, the controller receiving an engine activation signal and switching a state of the relay to a closed state. If an engine is not started, the controller switches the state of the relay to an open state.

The present invention relates to a system for diagnosing a fault of relays for a vehicle. According to the exemplary embodiments of the present invention, it is possible to diagnose the fault of the relays for the vehicle with the simple device configuration.

Operation for performing diagnostics, such as vehicle diagnostics including short circuit and low impedance diagnostics during a high-voltage (HV) battery pre-charging a power-net of the vehicle and including insulation resistance monitoring diagnostics for measuring an insulation resistance between the power-net and another power-net, with reduced processing time includes measuring a physical parameter (voltage or current signal) as the parameter is being generated by a device-under-test to which the diagnostic process pertains. The diagnostic process requires a stable value of the parameter. The parameter variates while being generated during a beginning time and is stable while being generated during an ending time. While the parameter is being generated during the beginning time, a stable value of the parameter which the parameter will have during the ending time is predicted. The stable value of the parameter is predicted based on variation of measured values of the parameter during the beginning time.

A system for monitoring electrical contacts for an overhead trolley line may include a wear sensor arranged such that an electrical contact on a vehicle or work machine for contacting the overhead trolley line is continually or periodically in its line of sight. The wear sensor may be configured to capture spatial data defining the surface profile of the electrical contact. The system may also include a data processing module configured to receive the spatial data and identify a defect in the electrical contact based on the spatial data.

An electronic control unit of an electric vehicle is configured to, in a case of making a welding diagnosis of a charging relay with an external power supply device not being connected to a charging inlet, start the welding diagnosis when a vehicle speed becomes equal to or higher than a first vehicle speed, interrupt the welding diagnosis when the vehicle speed becomes equal to or lower than a second vehicle speed during the welding diagnosis, and resume the welding diagnosis when the vehicle speed becomes equal to or higher than the first vehicle speed during the interruption of the welding diagnosis. The second vehicle speed is equal to or lower than the first vehicle speed.

A diagnostic having an analog-to-digital converter that is electrically coupled to an output port of a first analog multiplexer and an output port of a second analog multiplexer is provided. The analog-to-digital converter receives the high side voltage level signal and the low side current level signal at first and second times, respectively, and outputs a high side voltage value and a low side current value, respectively, based on the high side voltage level signal and the low side current level signal, respectively, that are received by a microcontroller. The microcontroller commands a high side driver circuit and a low side driver circuit to transition a contact of the contactor to an open operational position when the first analog multiplexer is malfunctioning based on the high side voltage value.

A current detector and a detection unit are provided. The current detector is connected to at least one of drive current lines of a rotary machine. The detection unit performs an orthogonal detection on a main frequency detected by the current detector, and extracts a magnitude of a sideband wave. Then, a state of the rotary machine is diagnosed from the magnitude of the extracted sideband wave.

A lease management method of an electric power motion apparatus includes: checking idle time periods of the electric power motion apparatus at a lease station via a lease application and reserving lease of the electric power motion apparatus; unlocking the electric power motion apparatus via the lease application; acquiring lease information, a battery state and location information of the electric power motion apparatus, calculating time for replacing a battery of the electric power motion apparatus, determining a location for replacing the battery of the electric power motion apparatus, and notifying the electric power motion apparatus whose battery needs to be replaced, and the time and location for replacing the battery to a manager of the lease station via the lease application; and when the user returns the electric power motion apparatus via the lease application, enabling the electric power motion apparatus to self check, and terminating the lease.

The present invention relates to a power circuit of an inverter for an electric vehicle, and, more specifically, to a power circuit supplying a high voltage direct current from a high voltage power source to a drive circuit for driving an AC motor for the electric vehicle. In one case, the present invention provides a method of detecting an IGBT short circuit failure or an IGBT open circuit failure during electric vehicle key ON and charging conditions. The method includes the steps of: a) receiving information that a vehicle key has been turned on; b) detecting whether there is an IGBT short circuit failure; c) initiating vehicle failure action if an IGBT short circuit failure is detected, but detecting whether there is an IGBT open circuit failure if IGBT short failure is not detected; d) determining that the vehicle is ready to drive if IGBT short failure was not detected.

A verification procedure is performed when a tracking device is newly installed in a vehicle. The procedure involves transmitting a command to the tracking device to either disable or enable the vehicle starter. The installer is then prompted to engage the starter to start the vehicle. The tracking device then monitors the voltages on the vehicle's ignition wire and starter disable and starter enable wires going to a starter relay. The tracking device also monitors the state of a starter relay control wire. Measurement of the proper voltages on these wires provides verification that the tracking device has been connected properly. Continuing to monitor these voltages after installation provides an indication when a driver engages the starter in an attempt to start the vehicle.