Power distribution and circuit protection for a mobile application having a high efficiency inverter
A power electronics assembly for a mobile application includes a first power electronics component selectively coupled to a high source on a first side and coupled to a high voltage battery on a second side, a second power electronics component selectively coupled to one of a low load or a low voltage battery on a first side and coupled to the high voltage battery on a second side; and a controller, including an operating mode circuit structured to determine a discharge operating mode for the mobile application, a power electronics configuration circuit structured to provide a switch state value for the first power electronics component and the second power electronics component in response to the discharge operating mode, and wherein the first power electronics component and the second power electronics component are responsive to the switch state value to coupled selected ones of the high source, low load, and low voltage battery to the high voltage battery.
1. A system for power distribution in a mobile electric application, comprising:
a high voltage energy storage device;
a low voltage energy storage device;
an alternating current (AC) external interface configured to selectively couple a plurality of AC load/source components, wherein the AC external interface comprises a switch having a first position that electrically couples the plurality of AC load/source components to the high voltage energy storage device, and a second position that electrically isolates the plurality of AC load/source components from the high voltage energy storage device, wherein the second position of the switch comprises a closed position, and wherein the closed position of the switch bypasses a coupling inductor between the high voltage energy storage device and the AC external interface.
2. The system of claim 1 , wherein the plurality of AC load/source components comprise a grid connection and an AC load connection.
3. The system of claim 2 , wherein the grid connection comprises a charging connection.
4. The system of claim 2 , wherein the grid connection comprises a 3-phase AC connection.
5. The system of claim 2 , wherein the AC load connection comprises a consumer AC access.
6. The system of claim 1 , wherein the switch in the second position electrically couples the high voltage energy storage device to the low voltage energy storage device.
7. A method, comprising:
operating a mobile electric application having a high voltage energy storage device, a low voltage energy storage device, and an alternating current (AC) external interface;
selectively operating a switch between:
a first position that electrically couples the high voltage energy storage device to the AC external interface and electrically isolates the high voltage energy storage device from the low voltage energy storage device; and
a second position that electrically couples the high voltage energy storage device to the low voltage energy storage device and electrically isolates the high voltage energy storage device from the AC external interface, wherein the operating comprises a charging mode by selectively operating the switch to the second position, and controlling charging from the AC external interface to the high voltage energy storage device.
8. The method of claim 7 , wherein the operating comprises a driving mode by selectively operating the switch to the first position, and controlling direct current DC-DC conversion between the high voltage energy storage device and the low voltage energy storage device.
9. The method of claim 8 , further comprising controlling the DC-DC conversion by powering a controller with the high voltage energy storage device.
10. The method of claim 8 , further comprising controlling the DC-DC conversion by powering a controller with the low voltage energy storage device.
11. The method of claim 7 , further comprising controlling the charging by powering a controller with the low voltage energy storage device.
12. The method of claim 11 , further comprising controlling the charging by pausing the charging in response to the low voltage energy storage device having a state-of-charge below a threshold state-of-charge, operating the switch in the second position to charge the low voltage energy storage device, and returning to the charging in response to the low voltage energy storage device having a state-of-charge exceeding a second threshold state-of-charge.
13. A method, comprising:
operating a mobile electric application having a high voltage energy storage device, a low voltage energy storage device, and an alternating current (AC) external interface;
selectively operating a switch between:
a first position that electrically couples the high voltage energy storage device to the AC external interface and electrically isolates the high voltage energy storage device from the low voltage energy storage device; and
a second position that electrically couples the high voltage energy storage device to the low voltage energy storage device and electrically isolates the high voltage energy storage device from the AC external interface, wherein the operating comprises a discharging mode by selectively operating the switch to the second position, and controlling discharging from the high voltage energy storage device to the AC external interface.
14. The method of claim 13 , further comprising controlling the discharging by synchronizing the discharging to a grid coupled to the AC external interface.
15. The method of claim 13 , further comprising controlling the discharging by providing power to at least one of a grid or an AC load coupled to the AC external interface.
16. A controller, comprising:
a mobile application circuit structured to interpret an electrical distribution mode;
a distribution switch circuit structured to provide a switch position command in response to the electrical distribution mode; and
a switch configured to be responsive to the switch position command, wherein the switch comprises:
a first position that electrically couples a high voltage energy storage device to an AC external interface and electrically isolates the high voltage energy storage device from a low voltage energy storage device; and
a second position that electrically couples the high voltage energy storage device to the low voltage energy storage device and electrically isolates the high voltage energy storage device from the AC external interface.
17. The controller of claim 16 , wherein the electrical distribution mode comprises at least one mode selected from the modes consisting of: a discharging mode providing power from the high voltage energy storage device to the AC external interface; a charging mode providing power from the AC external interface to the high voltage energy storage device; and a low voltage charging mode providing power from the high voltage energy storage device to the low voltage energy storage device.
18. The controller of claim 16 , wherein the electrical distribution mode comprises a discharging mode providing power from the high voltage energy storage device to the AC electrical interface, the controller further comprising a power configuration circuit structured to synchronize power provided from the high voltage energy storage device with a grid electrically coupled to the AC external interface.