A power supply system includes: a first power circuit having a first battery, a second power circuit having a second battery, a voltage converter which converts voltage between the first power circuit and the second power circuit, a power converter which converts power between the first power circuit and the drive motor, a power control unit which controls charge/discharge of the first and second batteries by operating the voltage converter and the power converter, a first voltage parameter acquisition unit which calculates an effective value for the closed circuit voltage of the first battery as a first voltage parameter, a second voltage parameter acquisition unit which calculates the static voltage of the second battery as a second voltage parameter, in which the power control unit causes power to discharge from the second battery so that the second voltage parameter becomes no more than the first voltage parameter.

An electrical power supply device is configured to communicate with a start-stop controller that automatically shuts down and restarts an internal combustion engine in a vehicle. The device includes a DC-DC power convertor and a device controller. The DC-DC power convertor is configured to produce a first voltage or a second voltage that is less than the first voltage. The device controller causes the DC-DC power convertor to produce the first voltage in response to a first signal from the start-stop controller indicating that the input voltage will remain equal to or greater than the threshold voltage and also causes the DC-DC power convertor to produce the second voltage in response to a second signal from the start-stop controller indicating that the input voltage may become less than the threshold voltage.

Systems and methods for charging electric vehicles and for quantitative and qualitative load balancing of electrical demand are provided.

The present disclosure includes an automotive battery system that uses switching devices to increase operational performance and reliability. The battery system includes a battery cell, a primary switching device electrically coupled to a terminal of the battery cell, and a secondary switching device electrically coupled to the terminal of the battery cell and in parallel with the primary switching device. The primary switching device includes an electromechanical switching device that enables charging or discharging of the battery and generates a boosted voltage. A secondary switching device includes a solid-state switching device and a diode, electrically coupled in series, which detect short circuit conditions in a power-efficient manner and remove the short circuit condition by using the boosted voltage to actuate the armature. Furthermore, parallel switching devices work together to deliver appropriate amounts of power as required by an electrical device, increasing the performance, reliability, and life-span of a battery system.

Systems and methods for charging electric vehicles utilizing Graphical User Interface (GUI) elements.

A method for determining state of health of a battery on a vehicle comprises identifying a SOH testing segment on which the battery can be charged at a known charging rate for a time duration and determining an increase in voltage based on the charging rate, the time duration, an internal resistance of the battery, and/or a battery temperature differential over the time duration.

Apparatus (102) for providing an operating energy (110) for an auxiliary drive (106) for an electric vehicle (100). The apparatus (102) has a battery interface (112) for connecting the apparatus (102) to a vehicle battery (104), a bidirectional inverter (114) having a first terminal for connecting the inverter (114) to the battery interface (112) and a second terminal. The inverter (114) is formed to convert a DC voltage into an AC voltage and back. A switch with a terminal which the switch to the second terminal, to an auxiliary interface (116) for connecting the apparatus (102) to the auxiliary drive (106) and to a charge interface (212) for feeding electrical energy (214) into the apparatus (102). The switch connects the charge interface to the switch and to the auxiliary interface (116). The apparatus (102) has a control device for providing the boost signal and the charge signal.

Systems and methods for charging electric vehicles and for bi-directional, reverse, and cooperative charging of electric vehicles.

A vehicle electricity storage device includes a capacitor unit for supplying stored electric power to an electronically controlled system, and a microcomputer including a memory. The memory stores a plurality of thresholds (internal resistance limit values) different from each other. Each of the plurality of thresholds is to be compared with an electrical characteristic value (internal resistance value) related to the capacitor unit for determining a deterioration state of the capacitor unit. The each of the plurality of thresholds is stored in association with an identification ID for identifying the electronically controlled system. The microcomputer acquires the identification ID from the electronically controlled system. And the microcomputer selects, from the plurality of thresholds, a threshold associated with the identification ID acquired. Then the microcomputer determines the deterioration state of the capacitor unit by using the electrical characteristic value and the threshold selected.

When the state of charge of a battery is greater than or equal to a lower limit value and less than or equal to an upper limit value, an electronic control unit calculates a charging electric energy transferred between a motor-generator and the battery such that the battery is neither charged nor discharged. When the state of charge is less than the lower limit value, a required torque of the engine is calculated based on the charging electric energy, a power consumption of an auxiliary device, and a driving torque. When the state of charge is greater than or equal to the lower limit value and less than or equal to the upper limit value, the required torque is calculated based on the charging electric energy and the driving torque, without taking the power consumption into consideration.