Electrical power system including energy storage modules and shared system controller
AssigneeHamilton Sundstrand Corporation
InventorsMatthew L. Wilhide, William S. Heglund
Life of this patent
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Abstract
An example electrical power system includes a bus current controller configured to adjust a direct current (DC) provided on a DC bus, and a plurality of energy storage modules (ESMs). Each ESM includes at least one energy storage device, and includes a DC/DC converter configured to control charging of the at least one energy storage device from the DC bus and discharging of the at least one energy storage device onto the DC bus. A shared system controller is configured to control the bus current controller and the plurality of DC/DC converters. A method of controlling an electrical power system is also disclosed.
Claims20
An electrical power system, comprising:
- a direct current (DC) bus including a positive rail configured to provide a positive DC voltage, a negative rail configured to provide a negative DC voltage, and a ground rail;
- a bus current controller configured to adjust a DC provided on the DC bus;
- and
- a plurality of energy storage modules (ESMs), each comprising at least one energy storage device and a DC/DC converter configured to control charging of the at least one energy storage device from the DC bus and discharging of the at least one energy storage device onto the DC bus;
- wherein the plurality of ESMs includes a first ESM and a second ESM connected in a series stacked configuration such that the DC/DC converter of the first ESM and the DC/DC converter of the second ESM are connected to each other through a first path separate from the DC bus, the first ESM is configured to charge from and discharge onto the positive rail, and the second ESM is configured to charge from and discharge onto the negative rail.
A method of controlling an electrical power system for a vehicle, comprising:
- providing direct current (DC) on a DC bus, such that a positive voltage is provided on a positive rail of the DC bus and a negative DC voltage is provided on a negative rail of the DC bus, the DC bus also including a ground rail;
- selectively charging a plurality of energy storage devices of respective energy storage modules (ESMs) from the DC bus;
- selectively discharging the energy storage devices of the respective ESMs onto the DC bus to power one or more DC loads, wherein each ESM includes a respective DC/DC converter,
- wherein the plurality of ESMs includes a first ESM and a second ESM connected in a series stacked configuration such that the DC/DC converter of the first ESM and the DC/DC converter of the second ESM are connected to each other through a path separate from the DC bus, the first ESM charges from and discharges onto the positive rail, and the second ESM charges from and discharges onto the negative rail.
Dependencies are inferred from the claim text.