Electric vehicle

Patent metadata

Field	Value
Publication number	US-11325502-B2
Application number	US-201816644190-A
Country	US
Kind code	B2
Filing date	Sep 20, 2018
Priority date	Sep 25, 2017
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

An electric vehicle includes first to fourth motors respectively mounted to individually rotate right and left wheels in the front and rear of the vehicle, first to fourth fuel cell stack modules independently connected to the respective motors so as to supply power to the first to fourth motors, a battery pack for supplying power to the first to fourth motors, a main control part for controlling the first to fourth motors, the first to fourth fuel cell stack modules and the battery pack and a tank for supplying hydrogen gas to the first to fourth fuel cell stack modules.

First claim

The invention claimed is:

1. An electric vehicle comprising:
a first motor, a second motor, a third motor and a fourth motor mounted to individually rotate a first wheel, a second wheel, a third wheel and a fourth wheel of the vehicle, respectively;
a first fuel cell stack, a second fuel cell stack, a third fuel cell stack and a fourth fuel cell stack independently connected to a respective motor so as to supply power to the first motor, the second motor, the third motor and the fourth motor, respectively;
a battery pack for supplying power to the first motor, the second motor, the third motor and the fourth motor;
a main controller for controlling the first motor, the second motor, the third motor and the fourth motor, the first fuel cell stack, the second fuel cell stack, the third fuel cell stack and the fourth fuel cell stack and the battery pack; and
a tank for supplying hydrogen gas to the first to fourth fuel cell stacks,
wherein an inverter, a motor controller and a fuel cell stack controller are independently provided for each wheel, and
wherein the main controller is provided to integrally control each of the motor controller and the fuel cell stack controller.

2. The electric vehicle according to claim 1 , wherein each of the motor controllers and the fuel cell stack controllers is synchronized with the main controller.

3. The electric vehicle according to claim 1 , wherein each motor is supplied with main power from one of the fuel cell stacks and selectively supplied with power from the battery pack.

4. The electric vehicle according to claim 3 , wherein the main controller is provided to supply power to each motor through the battery pack when a fast load response is required or when supply of peak power is required.

5. The electric vehicle according to claim 3 , wherein the battery pack comprises a high voltage battery used for driving the motor and a low voltage battery for supplying power to peripheral devices.

6. The electric vehicle according to claim 1 , wherein the main controller is provided to perform charging of the battery pack through the fuel cell stacks when a charged amount of the battery pack falls below a predetermined value.

7. The electric vehicle according to claim 1 , wherein the main controller is provided to perform charging of the battery pack by regenerative braking of each motor when a charged amount of the battery pack falls below a predetermined value.

8. The electric vehicle according to claim 1 , wherein the main controller is provided to individually adjust the output of the first motor, the second motor, the third motor and the fourth motor.

9. The electric vehicle according to claim 8 , wherein the main controller is provided to individually adjust the output of the first motor, the second motor, the third motor and the fourth motor according to driving situations and road environments.

10. The electric vehicle according to claim 8 , wherein the main controller is provided to individually adjust the output of the first motor, the second motor, the third motor and the fourth motor so that the efficiency of the fuel cell stacks is maximized and the fuel consumption is minimized.

Assignees

• Lg Chemical Ltd

Inventors

• Kong Chang Sun
• Yang Jae Choon

Classifications

• B60K1/02

  comprising more than one electric motor · CPC title

• B60L2220/44

  Wheel Hub motors, i.e. integrated in the wheel hub · CPC title

• B60K7/0007

  the motor being electric · CPC title

• B60L2240/547

  Voltage · CPC title

• B60L50/75

  using propulsion power supplied by both fuel cells and batteries · CPC title