# US 2018/0026282 A1 · Restarting system, controller and restarting method for fuel cell vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0026282 A1 - Document ID: US20180026282A1 - Status: Published application - Kind: A1 - Application number: 15/335,338 - Filed: 2016-10-26 - Published: 2018-01-25 - Earliest claimed: 2016-07-21 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Kyu Il Lee; Gun Hyung Park; Sung Gone Yoon - Web page: https://patentgrep.com/patent/US20180026282A1 ## CPC - H01M 8/04552: {of the individual fuel cell} - H01M 8/04303: applied during shut-down - H01M 8/04873: {of the individual fuel cell} - H01M 8/04955: Shut-off or shut-down of fuel cells - H01M 8/04992: characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence - H01M 16/006: {of fuel cells with rechargeable batteries} - H01M 2250/20: Fuel cells in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - Y02E 60/50: Fuel cells - Y02T 90/40: Application of hydrogen technology to transportation, e.g. using fuel cells - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A restarting system, a controller, and a restarting method for a fuel cell vehicle are provided. The restarting system includes a consumption resistor connected in parallel to a high voltage line that connects between a fuel cell and a high voltage battery and a relay that adjusts the connection between the consumption resistor and the high voltage line. A controller operates the relay and when a shutdown request signal of the vehicle is input, charges the high voltage battery with residual generated power of the fuel cell or connects the relay to the consumption resistor to consume the residual generated power as the consumption resistance. When a starting request signal of the vehicle is input, the controller is reset when an output voltage of the fuel cell is reduced to be equal to or less than a required voltage and then output a starting permission signal of the vehicle. ## Claims ### Claim 1 A restarting system for a fuel cell vehicle, comprising: a consumption resistor connected in parallel to a high voltage line that connects between a fuel cell and a high voltage battery; a relay configured to adjust the connection between the consumption resistor and the high voltage line; and a controller configured to operate the relay, when a shutdown request signal of the vehicle is input, charge the high voltage battery with residual generated power of the fuel cell or connect the relay to the consumption resistor to consume the residual generated power as the consumption resistance, and when a starting request signal of the vehicle is input, perform a reset when an output voltage of the fuel cell is reduced to be equal to or less than a required voltage and output a starting permission signal of the vehicle. ### Claim 2 (depends on 1) The restarting system of claim 1, wherein the consumption resistor is connected in parallel between the fuel cell and the high voltage battery. ### Claim 3 (depends on 1) The restarting system of claim 1, wherein the relay is configured of a large-capacity switch and a low-capacity switch. ### Claim 4 (depends on 3) The restarting system of claim 3, wherein the large-capacity switch is an open switch and the low-capacity switch is a close switch. ### Claim 5 (depends on 4) The restarting system of claim 4, wherein the controller is configured to maintain both of the large-capacity switch and the low-capacity switch in an open state in a starting state of the vehicle and operate the large-capacity switch to be in a closed state and the low-capacity switch to be in an open state when an ending signal is input. ### Claim 6 (depends on 5) The restarting system of claim 5, wherein the low-capacity switch is closed during the reset of the controller in the open state and then is opened again. ### Claim 7 (depends on 1) The restarting system of claim 1, wherein when an air amount in the fuel cell is reduced to be equal to or less than a required air amount when the starting request signal of the vehicle is input, the controller is reset and then configured to output the starting permission signal of the vehicle. ### Claim 8 (depends on 1) The restarting system of claim 1, wherein when an energy amount in the fuel cell is reduced to be equal to or less than a required energy amount when the starting request signal of the vehicle is input, the controller is reset and then configured to output the starting permission signal of the vehicle. ### Claim 9 (depends on 1) The restarting system of claim 1, wherein the high voltage battery is connected to the high voltage line via a converter, the controller is configured to operate the converter in a buck mode when the shutdown request signal of the vehicle is input to charge the high voltage battery with the residual generated power of the fuel cell to decrease the output voltage of the fuel cell. ### Claim 10 A restarting method of a restarting system for a fuel cell vehicle, comprising: when a shutdown request signal of the vehicle is input, charging, by a controller, a high voltage battery with residual generated power of the fuel cell or connecting a relay to a consumption resistor to consume the residual generated power as the consumption resistance; recognizing, by the controller, a starting request signal of the fuel cell vehicle; and when an output voltage of the fuel cell is reduced to be equal to or less than a required voltage, resetting the controller and outputting, by the controller, a starting permission signal of the fuel cell vehicle. ### Claim 11 A restarting method of a restarting system for a fuel cell vehicle, comprising: when a shutdown request signal of the fuel cell vehicle is input, decreasing, by a controller, an output voltage of a fuel cell by operating a converter in a buck mode to charge a high voltage battery with residual generated power of the fuel cell; recognizing, by the controller, a starting request signal of the fuel cell vehicle; when the output voltage of the fuel cell is greater than a required voltage or a shutdown request signal is input and then a starting request signal is input within a predetermined time, connecting, by the controller, a relay to a consumption resistor to consume the residual generated power of the fuel cell as the consumption resistance; and when the output voltage of the fuel cell is reduced to be equal to or less than the required voltage, resetting the controller and outputting, by the controller, a starting permission signal of the fuel cell vehicle. ### Claim 12 A controller for a restarting system of a fuel cell vehicle in which a relay and a consumption resistor are connected in parallel to a high voltage line connecting between a fuel cell and a high voltage battery, wherein the controller is configured to: operate the relay, when a shutdown request signal of the vehicle is input; charge the high voltage battery with residual generated power of the fuel cell or connect the relay to the consumption resistor to consume the residual generated power as the consumption resistance; and when a starting request signal of the vehicle is input, reset when an output voltage of the fuel cell is reduced to be equal to or less than a required voltage and then output a starting permission signal of the vehicle.