Fuel cell vehicle system and method of controlling the same

Patent metadata

Field	Value
Publication number	US-10793020-B2
Application number	US-201815997288-A
Country	US
Kind code	B2
Filing date	Jun 4, 2018
Priority date	Nov 22, 2017
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A fuel cell vehicle system is provided. The system includes a fuel cell and a first motor that is connected to the fuel cell via a first bus terminal and driven by power supplied from the fuel cell and that provides power to driving wheels of the vehicle. A high voltage battery stores or supplies power by charging or discharging. Additionally, a second motor is connected to the high voltage battery via a second bus terminal and driven by power supplied from the high voltage battery and provides power to the driving wheels of the vehicle.

First claim

What is claimed is:

1. A method of controlling a fuel cell vehicle system, comprising:
a fuel cell;
a first motor connected to the fuel cell via a first bus terminal and driven by power supplied from the fuel cell and configured to provide power to driving wheels of the vehicle;
a high voltage battery configured to store or supply power by charging or discharging;
a second motor connected to the high voltage battery via a second bus terminal and driven by power supplied from the high voltage battery and configured to provide power to the driving wheels of the vehicle;
a bidirectional direct current-direct current (DC/DC) converter positioned between the first bus terminal and the high voltage battery; and
a controller configured to operate the bidirectional DC/DC converter to adjust a transmission of power between the first bus terminal and the high voltage battery, the method comprising:
diagnosing, by the controller, a failure state of the fuel cell vehicle system; and
operating, by the controller, a driving wheel of the fuel cell vehicle in a driving mode selected based on the diagnosed failure state,
wherein when the fuel cell is diagnosed as having failed, the driving wheel is operated in a driving mode in which a first motor or a second motor is driven with the power of the high voltage battery, and
wherein when the second motor is diagnosed as having failed, the bidirectional DC/DC converter is operated to supply the power of the high voltage battery to a first bus terminal to operate the driving wheel in a driving mode in which the first motor is driven.

2. The method of claim 1 , wherein when the high voltage battery is diagnosed as having failed, the driving wheel is operated in a driving mode in which the first motor or the second motor is driven with the power of the fuel cell.

3. The method of claim 2 , wherein when the first motor is diagnosed as having failed, the bidirectional DC/DC converter is operated to provide the power of the first bus terminal to a second inverter to drive the second motor.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Lee Seung Hwan
• Jeon Soon Il

Classifications

• B60L15/20

  for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed · CPC title

• B60L3/0061

  relating to electrical machines · CPC title

• B60L7/10

  Dynamic electric regenerative braking (B60L7/22 takes precedence) · CPC title

• Y02E60/50

  Fuel cells · CPC title

• B60L2260/00

  Operating Modes · CPC title