Fuel cell system with connector welding prevention
First Claim
1. A fuel cell system, comprising:
- a fuel cell that receives fuel gas and oxidation gas and generates electric power through electrochemical reaction of the fuel gas and the oxidation gas;
a storage section capable of charging with the electric power generated at the fuel cell;
an electric power consumption device that consumes electric power from the fuel cell and the storage section;
a first voltage converter disposed between the fuel cell and the electric power consumption device;
a second voltage converter disposed between the storage section and the electric power consumption device;
a connector that connects or disconnects a path, the path supplying electric power from the first voltage converter to the electric power consumption device and coupling the first voltage converter and the second voltage converter; and
a controller that is programmed to control connection or disconnection of the path supplying electric power by the connector,wherein when the system starts, the controller is further programmed to compare an output voltage difference between the first voltage converter and the second voltage converter with a predetermined value that is set as a value at which welding of the connector occurs, andwherein the controller is further programmed to maintain the output voltage difference equal to or less than the predetermined value, and to subsequently connect the path,wherein the controller is further programmed to control the output voltage difference to be a predetermined value or less by boosting an output voltage of the first voltage converter.
1 Assignment
0 Petitions
Accused Products
Abstract
Weld of a relay provided on an electric power supply path can be suppressed. When a fuel cell system starts, a controller sets an output voltage of a Bat converter at an open circuit voltage of a battery and sets an output voltage of a FC converter at an open circuit voltage of a fuel cell. When the output voltage of the FC converter is lower than the output voltage of the Bat converter, the controller controls to boost the output voltage of the FC converter to the output voltage of the Bat converter. On the other hand, when the output voltage of the FC converter is the output voltage of the Bat converter or more, the controller controls to boost the output voltage of the Bat converter to the output voltage of the FC converter. When the output voltage difference between the FC converter and the Bat converter is a predetermined value or less capable of turning the FC relays ON without causing welding of the FC relays, the controller turns the FC relays ON.
-
Citations
4 Claims
-
1. A fuel cell system, comprising:
-
a fuel cell that receives fuel gas and oxidation gas and generates electric power through electrochemical reaction of the fuel gas and the oxidation gas; a storage section capable of charging with the electric power generated at the fuel cell; an electric power consumption device that consumes electric power from the fuel cell and the storage section; a first voltage converter disposed between the fuel cell and the electric power consumption device; a second voltage converter disposed between the storage section and the electric power consumption device; a connector that connects or disconnects a path, the path supplying electric power from the first voltage converter to the electric power consumption device and coupling the first voltage converter and the second voltage converter; and a controller that is programmed to control connection or disconnection of the path supplying electric power by the connector, wherein when the system starts, the controller is further programmed to compare an output voltage difference between the first voltage converter and the second voltage converter with a predetermined value that is set as a value at which welding of the connector occurs, and wherein the controller is further programmed to maintain the output voltage difference equal to or less than the predetermined value, and to subsequently connect the path, wherein the controller is further programmed to control the output voltage difference to be a predetermined value or less by boosting an output voltage of the first voltage converter. - View Dependent Claims (2, 3, 4)
-
Specification