An on-vehicle network system includes, for each of a plurality of zones defined in a vehicle, a zone control unit, a power distributor connected to an on-board battery, and a plurality of electronic devices supplied with power from the power distributor via a common power supply line. Each of individual relays is interposed between one of the electronic devices and a body ground of the vehicle to individually turn on and off connection between the one of electronic device and the body ground based on a control signal from the zone control unit.

An arrangement includes: a direct current power network with a plus pole and a minus pole; two series capacitors, a first outer tap being connected to the plus pole via a first power line, a second outer tap being connected to the minus pole via a second power line and a middle tap is connected to ground; a circuit switch arranged in at least one of the first and the second power line; a circuit switch control unit for opening the circuit switch upon overcurrent and/or upon manual intervention; a switchable high ohmic path in at least one of the first and the second power line, which bypasses a) a switchable low ohmic path in the least one of the first and the second power line or b) the circuit switch; and a load control unit for measuring a total voltage of the two series capacitors.

In one embodiment, an apparatus includes a power supply operable to output power to a load along with at least one other power supply, a sensing component for identifying a load level, and a control component for switching the power supply from a full power mode to a power saving mode based on the identified load level. The power supply shares current with the other power supply at a lower current and generally the same voltage as the other power supply while in the power saving mode.

A scalable DC power distribution and control system suitable for commercial buildings includes one or more power and control hubs. Each DC power and control power hub provides power and control for any suitable distributed DC loads such as light-fixtures. AC power from the electric utility is applied to the power and control hub and is converted to DC power for distribution to DC loads within the space using low-voltage cables.

A scalable DC power distribution and control system suitable for commercial buildings includes one or more power and control hubs. Each DC power and control power hub provides power and control for any suitable distributed DC loads such as light-fixtures. AC power from the electric utility is applied to the power and control hub and is converted to DC power for distribution to DC loads within the space using low-voltage cables.

A power supply assembly including a load supply converter system and energy saving transfer route both connected electrically to a load connection. The energy saving transfer route bypasses the load supply converter system, and includes a bypass switch system having a first bypass switch and second bypass switch connected in series. A control system of the power supply assembly is adapted to provide a system diagnostic operation including providing a diagnostic state for the bypass switch system by controlling the first bypass switch into a non-conducting state, and controlling the second bypass switch into a conducting state, generating a diagnostic voltage in an output of the load supply converter system, and detecting a short circuit incident if an electric current flowing through the bypass switch system exceeds a predetermined short circuit threshold value.

The present invention is generally directed to a Sleep Manager Module (“SLM”). In one case, the present invention provides a stand-alone Sleep Manager Module. The Sleep Manager Module is capable of optimizing electric vehicle power consumption based on external temperature. It has one or more interfaces that are electrically connected to a microcontroller. The microcontroller is operably connected to memory, and the one or more interfaces is selected from a group of interfaces consisting of a fast charge connector, a level II Electric Vehicle Supply Equipment, and temperature/battery voltage sensors. The microcontroller is connected to a Vehicle Integration Manager through a Wake-Up line and Vehicle Communication Line.

The present invention is generally directed to a Sleep Manager Module (“SLM”). In one case, the present invention provides a stand-alone Sleep Manager Module. The Sleep Manager Module is capable of optimizing electric vehicle power consumption based on external temperature. It has one or more interfaces that are electrically connected to a microcontroller. The microcontroller is operably connected to memory, and the one or more interfaces is selected from a group of interfaces consisting of a fast charge connector, a level II Electric Vehicle Supply Equipment, and temperature/battery voltage sensors. The microcontroller is connected to a Vehicle Integration Manager through a Wake-Up line and Vehicle Communication Line.

A method for operating a vehicle that includes a DC/DC converter is described. In one example, the method includes adjusting an output voltage of the DC/DC converter after the DC/DC converter is used to crank an engine. The output voltage of the DC/DC converter may be adjusted responsive to a state of charge of an ultra-capacitor.

The present disclosure relates to a control method, a load and a power grid system. The method includes: detecting (S102) a voltage change parameter on a power supply side; analyzing (S104) a load control strategy corresponding to the voltage change parameter; controlling (S106) an operation of the load according to the load control strategy. The solution solves the problem of inadequate communication facilities in the DC micro-grid, the DC home communication can be completed without or with less dedicated communication circuits, accordingly the system cost is reduced.