System, method of controlling a system, and vehicle comprising a system

Patent metadata

Field	Value
Publication number	US-2023290978-A1
Application number	US-202318116368-A
Country	US
Kind code	A1
Filing date	Mar 2, 2023
Priority date	Mar 11, 2022
Publication date	Sep 14, 2023
Grant date	—

Abstract

An energy management system for a vehicle comprising a fuel cell system having at least one fuel cell with an anode side and a cathode side, an air inlet conduit connected to an inlet end of the cathode side for supplying air to the cathode side of the at least one fuel cell, and further having an air compressor arrangement disposed in the air inlet conduit and in fluid communication with the cathode side; wherein the energy management system further comprises an air-cooled brake resistor in fluid communication with the air compressor arrangement, and a control system in communication with the air compressor arrangement and with a controllable valve assembly arranged and configured to control supply of compressed air from the air compressor arrangement to any one of the at least one fuel cell and the air-cooled brake resistor via a first fluid conduit and a second fluid conduit, respectively.

First claim

1 . An energy management system for a vehicle, comprising:
a fuel cell system having at least one fuel cell with an anode side and a cathode side, an air inlet conduit connected to an inlet end of the cathode side for supplying air to the cathode side of the at least one fuel cell, and further having an air compressor arrangement disposed in the air inlet conduit and in fluid communication with the cathode side; an air-cooled brake resistor in fluid communication with the air compressor arrangement; and a control system in communication with the air compressor arrangement and further in communication with a controllable valve assembly, the controllable valve assembly being arranged and configured to control supply of compressed air from the air compressor arrangement to any one of the at least one fuel cell and the air-cooled brake resistor via a first fluid conduit and a second fluid conduit, respectively; wherein the control system is configured to control distribution of compressed air to any one of the air-cooled brake resistor and the at least one fuel cell by operating the air compressor arrangement and controlling the controllable valve assembly responsive to a need for dissipating energy.

2 . The energy management system of claim 1 , wherein the control system is configured to control distribution of compressed air to any one of the air-cooled brake resistor and the at least one fuel cell by controlling the controllable valve assembly in response to a control signal containing data indicative of a need for dissipating energy due to a braking demand of the vehicle.

3 . The energy management system of claim 2 , wherein the control system is configured to determine the need for dissipating energy due to the braking demand of the vehicle by determining an amount of possible energy from a regenerative braking event of the vehicle.

4 . The energy management system of claim 1 , wherein the control system is configured to control distribution of compressed air to any one of the air-cooled brake resistor and the at least one fuel cell by controlling the controllable valve assembly in response to a control signal further containing data indicative of a fuel cell system load.

5 . The energy management system of claim 1 , wherein the control system is configured to control the controllable valve assembly to direct compressed air to the air-cooled brake resistor in response to the need for dissipating energy and to control the controllable valve assembly to vary the level of distribution of compressed air to the at least one fuel cell in response to a change in the fuel cell system load.

6 . The energy management system of claim 4 , wherein the control system is configured to prioritize distributing compressed air to the at least one fuel cell on the basis of the data indicating the fuel cell system load.

7 . The energy management system of claim 4 , wherein the controllable valve assembly is controlled to distribute a substantial amount of produced compressed air to the at least one fuel cell if the fuel cell system load is above a threshold value and distribute any remaining produced compressed air to the air-cooled brake resistor.

8 . The energy management system of claim 1 , wherein the control system is configured to determine a maximum operational state of the air compressor arrangement and control the controllable valve assembly to limit the distribution of compressed air to the air-cooled brake resistor if the air compressor arrangement reaches its maximum operational state.

9 . The energy management system of claim 1 , wherein the control system is configured to deactivate the air compressor arrangement in response to a non-braking demand and no fuel cell system load.

10 . The energy management system of claim 1 , wherein the control system is configured to control distribution of compressed air to any one of the air-cooled brake resistor and the at least one fuel cell by operating the air compressor arrangement and controlling the controllable valve assembly responsive to the need for dissipating energy and when the vehicle is at stand-still.

11 . The energy management system of claim 1 , wherein the controllable valve assembly comprises a set of individual flow control valves, each one of the individual flow control valves being configured to regulate any one of a flow rate and pressure of the compressed air being supplied from the air compressor arrangement.

12 . The energy management system of claim 11 , wherein one of the individual flow control valves is disposed in the first fluid conduit and arranged to regulate the flow rate or pressure of the compressed air to the at least one fuel cell.

13 . The energy management system of claim 11 , wherein one of the individual flow control valves is disposed in the second fluid conduit and arranged to regulate the flow rate or pressure of compressed air to the air-cooled brake resistor.

14 . The energy management system of claim 1 , wherein the controllable valve assembly is a three-way flow control valve device.

15 . A vehicle comprising the energy management system of claim 1 .

16 . A method for controlling an energy management system of a vehicle, the energy management system comprising:
a fuel cell system having at least one fuel cell with an anode side, an air compressor arrangement in fluid communication with the cathode side via a first fluid conduit; an air-cooled brake resistor in fluid communication with the air compressor arrangement via a second fluid conduit; and a control system having a controller in communication with the air compressor arrangement and further in communication with a controllable valve assembly for controlling supply of compressed air from the air compressor arrangement to any one of the at least one fuel cell and the air-cooled brake resistor via the first fluid conduit and the second fluid conduit, respectively; the method comprising:
receiving a control signal containing data indicative of need for dissipating energy; and
in response to the received control signal, controlling distribution of compressed air to any one of the air-cooled brake resistor and the at least one fuel cell by controlling the air compressor arrangement and the controllable valve assembly.

Assignees

• Volvo Truck Corp

Inventors

• Audhav Tove
• Rahm Fredrik

Classifications

• B60L7/22 Primary

  Dynamic electric resistor braking, combined with dynamic electric regenerative braking · CPC title

• B60L58/30

  for monitoring or controlling fuel cells · CPC title

• B60L1/003

  to auxiliary motors, e.g. for pumps, compressors · CPC title

• B60L2200/40

  Working vehicles · CPC title

• B60L50/71

  Arrangement of fuel cells within vehicles specially adapted for electric vehicles · CPC title