A charging circuit, charging method, and system for an energy storage capacitor are disclosed. The charging circuit includes a current regulation module and a feedback control module. The feedback control module is configured to (i) determine a current measurement result, wherein the current measurement result is used to indicate the magnitude of the present charging current output by the current regulation module to the energy storage capacitor, and (ii) output a control signal to the current regulation module based on the current measurement result, the present voltage of the energy storage capacitor, and the input voltage received by the current regulation module, wherein the control signal corresponds to a target charging current. The current regulation module is configured to output the target charging current based on the control signal and the input voltage.

A control device for a load in a vehicle with a first on-board network operated using a first voltage and a second on-board network operated using a second voltage, wherein the first voltage is greater than the second voltage, the control device comprising a reference voltage generating unit configured to provide a reference voltage; a signal voltage limiting unit configured to receive a bus signal from the second on-board network und to limit a voltage of the bus signal to at most the reference voltage; a bus signal receiving unit configured to receive the voltage-limited bus signal from the signal voltage limiting unit; and a supply voltage generating unit configured to generate, according to the voltage-limited bus signal, a supply voltage for the load based on the first voltage.

A first processing circuit of a power supply system can selectively perform: a first process of pre-charging a smoothing capacitor provided in a first load device by supplying electric power from a first power storage device to the first load device via a precharge resistor provided in the first processing circuit; a second process of discharging, via the precharge resistor, electric charges accumulated in the smoothing capacitor; and a third process of discharging, via the precharge resistor, electric charges accumulated in the first power storage device.

The object of the present invention is to achieve redundancy of a power supply function by a simple configuration, to ensure operational continuity in case of failure. A power grid (1) comprises: a first power supply path (20-1) that is connected to a main engine-driving power source (100-0) of a vehicle via a power conversion device (101) and to loads (40-1, 41, 42-1) ; and a second power supply path (20-2) that is connected to a power source (100-2) different from the main engine-driving power source (100-0), to loads (40-2, 41, 42-2), and to the first power supply path (20-1) via a switch SW0. The switch SW0 is closed when the first power supply path (20-1) and the second power supply path (20-2) are normal, and is opened when the first power supply path (20-1) or the second power supply path (20-2) is abnormal.

Described are various embodiments of a system and method for utilizing excess generated or supplied electrical power from an electrical storage device for powering an electrical energy consuming device.

A control device includes: a control section that, on the basis of a first supplied electric power maximum value computed in accordance with a radiation amount with respect to an electric power supplying device, and a second supplied electric power maximum value computed from temporal deterioration of the electric power supplying device, determines an electric power supply maximum value that is a maximum value of electric power to be supplied from the electric power supplying device to at least one external device.

An in-vehicle network system includes a plurality of control devices connected to a communication bus and configured to communicate with each other. The plurality of control devices includes at least one upper control device and a plurality of lower control devices. The upper control device turns on and off a plurality of relay circuits provided in a power supply line, receives a network management message, instructs the power management unit to turn on the relay circuit, sets the lower control device, detects a power supply state and a communication state, and determines an abnormality occurrence location.

An energy supply management system for a vehicle, includes at least one energy supply system with at least one energy supply unit and at least one load unit which can be supplied with energy by the at least one energy supply system in order to be supplied with energy. The energy supply management system is configured so as to determine the availability of functions of the at least one load unit, an energy requirement based on the determined availability of functions of the at least one load unit, and the energy which can be provided by the at least one energy supply unit in order to cover the energy requirement.

An example system includes a first battery; a second battery; a switch coupled to the first battery and the second battery, the switch configured to, based on a control signal, connect or disconnect at least one of the first battery from a load or the second battery from a load; and a current sensor to generate the control signal, the current sensor including a first sensor input terminal and a second sensor input terminal; and an amplifier configured to operate as an amplifier to determine an amount of current between the first sensor input terminal and the second sensor input terminal; and operate as a comparator to determine a direction of the current between the first sensor input terminal and the second sensor input terminal, the control signal corresponding to at least one of the amount of current or the direction of the current.

The first control device is connected to a power supply. The second control device is connected to the first control device via a power supply line and operates with power supplied from the first control device via the power supply line. The switch switches whether or not to make the power supply and the power supply line conductive to each other. The power supply unit is configured to supply power to a power supply line. When the switch is in the conduction state, power is supplied from the power supply to the power line at a first voltage. When the switch is in a non-conductive state, power is supplied from the power supply unit to the power supply line at a second voltage. The first controller switches a switch to transmit the pulse signal to the second control device via a power supply line.