A redundant power source ECU detects for failure of a power source of a primary system from a first DC-to-DC converter. In cases in which a failure has been detected during autonomous driving, the redundant power source ECU performs control to cause operation by a sub battery of a predetermined secondary system component that draws an inrush current, regardless of whether or not operation has been requested.

A battery module includes a housing, a plurality of battery cells disposed in the housing, and a printed circuit board (PCB) assembly disposed in the housing. The PCB assembly includes a PCB and a shunt disposed across a first surface of the PCB. A second surface of the shunt directly contacts the first surface of the PCB, and the shunt is electrically coupled between the battery cells and a terminal of the battery module.

A control method for a power supply, in which a link capacitor is connected between an external load and a power relay assembly (PRA) that includes a precharge resistor to control a power flow between a battery and the external load, the control method including: initiating precharge; after the initiating of the precharge, measuring voltages of the link capacitor by measuring a first voltage V1 of the link capacitor at a first time T1, measuring a second voltage V2 of the link capacitor at a second time T2, and measuring a third voltage V3 of the link capacitor at a third time T3, the first time T1, the second time T2, and the third time T3 each being different times; calculating a capacitance C of the link capacitor using the first voltage V1, the second voltage V2, and the third voltage V3; and terminating the precharge.

The invention relates to a circuit assembly, to a system and to a method for switching a high-voltage battery (201) and to a vehicle having such a circuit assembly and such a system. The circuit assembly comprises a transistor for conducting a current from the battery (201) to a load and comprises a diode (202) for conducting a return current into the battery (201). The circuit assembly is configured to provide a pre-charging current by means of the pulsed switching of the transistor (203).

An energy storage apparatus includes: an external terminal connected to an energy storage device; a current cut-off device disposed on a current path connecting the energy storage device and the external terminal to each other; a voltage applying circuit that applies a voltage to the external terminal using the energy storage device or another circuit as a power source; and a control device. The control device is configured to perform: current cut-off processing for cutting off flowing of a current into the energy storage device by bringing the current cut-off device into an OPEN state; detecting processing for detecting a voltage of the external terminal to which a voltage is applied by the voltage applying circuit during a period in which the flowing of the current is cut off by the current cut-off processing; and determining processing for determining a presence or a non-presence of a short-circuiting object.

The present disclosure relates to battery system having a plurality of battery modules and a battery management system. The plurality of battery modules are arranged in series to define a battery string. Each of the plurality of battery modules comprises a supervisory circuit, one or more cell packs, and one or more switches to electrically connect the one or more cell packs to the battery string. The battery management system to selectively switch, for each of the plurality of battery modules, the one or more switches between a first position that electrically places the one or more cell packs in series with the battery string and a second position that electrically bypasses the one or more cell packs from the battery string. The battery management system is configured to electrically couple the battery string with a battery bus via a string switch.

A semiconductor device includes a first terminal for a battery, a second terminal for an inverter circuit, and a transistor. The semiconductor device is configured to control a voltage applied to a control terminal of the transistor to allow supply of a current from the first terminal to the second terminal and allow supply of a current from the second terminal to the first terminal. A withstand voltage between the first terminal and the second terminal is greater than or equal to a voltage between the battery and the inverter circuit.

A semiconductor unit is arranged between a motor and an inverter circuit that controls the motor. The semiconductor unit includes a transistor and a controller. The transistor is arranged between the inverter circuit and a positive electrode of a battery that supplies power to the inverter circuit, and controls supplying of power from the battery to the inverter circuit. The controller is connected to a control terminal of the transistor, and controls a control voltage that is a voltage applied to the control terminal. When power starts to be supplied from the battery to the inverter circuit, the controller controls the control voltage to intermittently operate the transistor and also decreases the control voltage, which is applied to the control terminal of the transistor, to be lower than the control voltage at which the transistor is fully activated.

A controller includes a voltage increasing unit and a pre-charge controlling unit. The voltage increasing unit stops a voltage increasing operation of a converter based on a converter controlling signal delivered from the pre-charge controlling unit. After the charged voltage of the capacitor shifts from an increase to a decrease in response to stopping of the voltage increasing operation of the converter, the pre-charge controlling unit refrains from switching a relay when a charged voltage of a capacitor is out of a target voltage range, and establishes an electrical connection of the relay when the charged voltage of the capacitor becomes a value within a target voltage range.

A switching device for a supply line for supplying electrical loads with electricity includes a power input, a power output, a controlled switching element, and a regulated resistance. The controlled switching element is disposed electrically between the power input and the power output and is configured to electrically couple the power input to the power output in a controlled manner. The regulated resistance is disposed electrically parallel to the controlled switching element. The regulated resistance is configured to electrically connect the power input to the power output during opening of the controlled switching element and occurring of voltage spikes between the power input and the power output. A voltage supply system, a method, and a manufacturing method are provided.