A vehicle may include a vehicle charging system having an alternator operatively coupled to an engine and a controller. The controller may be programmed to output a warning indicative of a vehicle charging system fault in response to a quotient of a voltage drop associated with the alternator and an output current of the alternator exceeding a threshold value while the alternator is operating in a steady state condition.

Provided is a conversion device which can determine the presence/absence of a failure in a detection unit for detecting AC or DC voltage or current. A conversion device, including an AC-DC conversion circuit, a DC-DC conversion circuit for converting DC voltage output from the AC-DC conversion circuit and a detection unit for detecting AC or DC voltage or current, comprises an obtaining part for obtaining information indicating whether or not AC voltage is applied to the AC-DC conversion circuit, and a power supply fault determination part for determination presence/absence of a power supply fault or an open fault in the detection unit if the obtained information indicates that AC voltage is not applied to the AC-DC conversion circuit.

A power management system is disclosed for managing power in a vehicle. The system may include a power distribution unit (PDU) communicably coupled to a power controller unit located in the vehicle. The power controller unit comprises a microcontroller configured to: receive, from the PDU, a temperature value that indicates a temperature of the PDU, one or more voltage values from the one or more voltage sensors, or one or more current values from the one or more current sensors, perform a determination that the temperature value, the one or more voltage values, or the one or more current values are below one or more of their respective pre-determined threshold values, and send, after the determination, a health status message to a computer located in the vehicle, where the health status message indicates that the PDU is operating in a safe operating condition.

A charging function inspection device for eco-friendly vehicles is provided. The charging function inspection device includes an inspection connector connectable to a vehicle to supply a communication signal and a power signal to the vehicle, and an inspection controller configured to determine whether a charging function of a high-voltage battery of the vehicle is operated normally based on the connection of the inspection connector.

The electric leakage detection method disclosed herein includes: total voltage measurement of measuring a total voltage V.sub.t which is an electrical potential difference between a total positive terminal open to be connectable with an external device and a total negative terminal open to be connectable with the external device; electric leakage voltage measurement of measuring an electric leakage voltage V.sub.L which is an electrical potential difference between a reference terminal (the total negative terminal) and the electric leakage occurring position (the third single battery); and an electric leakage occurring position determination of determining the electric leakage occurring position by calculating a ratio (V.sub.L/V.sub.t) of the electric leakage voltage V.sub.L to the total voltage V.sub.t. This allows the number of single batteries between the reference terminal and the electric leakage occurring position to be estimated, and a detailed electric leakage occurring position to be determined.

An electrified vehicle includes an electric motor configured to output power for traveling, an electric power storage device configured to supply electric power to the electric motor, and a control device configured to set an input limit as a maximum value of a charging current in charging the electric power storage device using electric power from an external power supply. The control device is configured to set a greater value as the input limit when a vehicle use ratio as a proportion of a use index indicating a degree of cumulative use of the vehicle to a prescribed maximum value of the use index is large than when the vehicle use ratio is small.

An over-discharge diagnosing method includes, among other things, evaluating concurrently, a voltage behavior of a battery pack, a current behavior of the battery pack, and a temperature behavior of the battery pack. The method further includes detecting an over-discharge based on the evaluating, and communicating an over-discharge notification in response to the detecting.

A fault simulation system that has a simulation unit comprising an ECU model including an element fault model made to have a fault by a time setting or external command and all or a portion of a sensor model, actuator model, vehicle model, and driver model and can evaluate vehicle behavior at the time of an element fault according to driving operation based on a set travel scenario, wherein the passage time, vehicle behavior, driving operation, and the like, at each point on a course are determined through non-fault simulation and on the basis of that information, an element fault is inserted according to a fault time setting or fault command for the element fault model.

The invention relates to a circuit assembly (10) for fault detection in an ungrounded high-voltage system (20) having a connected inverter (4) and having at least one resistor (5) between a high-voltage potential (7a, 7b) of the high-voltage system (20) and a reference potential (8), the circuit assembly (10) comprising: a sensing circuit (1), which is designed to tap a voltage from the resistor (5), to generate a first measurement value therefrom and to provide the first measurement value at an output (1c, 1d); and an evaluation device (2), which is connected to the output (1c, 1d) of the sensing circuit (1), the evaluation device (2) being designed to compare the first measurement value with a first limit value and to output a first signal if the first measurement value exceeds the first limit value.

Provided is a battery degradation detection device that detects the degradation state of a battery installed on a vehicle. The battery degradation detection device includes: a flag setting unit that sets, each time the vehicle is started, a flag indicating a sign of degradation of the battery on the basis of a voltage value of the battery at the start of the vehicle; a flag storage unit that stores the flag; a sign-of-degradation determination unit that determines whether or not the battery shows a sign of degradation on the basis of the number of times the flag has been stored in the past; and a degradation determination unit that determines whether or not the battery is in a degradation state on the basis of the voltage value of the battery when it is determined by the sign-of-degradation determination unit that the battery shows a sign of degradation.