Solid oxide fuel cell device and fuel cell vehicle

Patent metadata

Field	Value
Publication number	US-2023275242-A1
Application number	US-202118005582-A
Country	US
Kind code	A1
Filing date	Sep 13, 2021
Priority date	Sep 16, 2020
Publication date	Aug 31, 2023
Grant date	—

Abstract

A solid oxide fuel cell device comprises a fuel cell stack, with a fuel tank which is connected to the fuel cell stack at the anode side by an anode supply line, being associated with a jet pump into which an anode recirculation line empties, having a compressor which is connected to the fuel cell stack at the cathode side by a cathode supply line, being associated with an air preheater, through which a cathode exhaust gas line is led for the transfer of heat from the cathode exhaust gas. In the anode supply line, upstream from a driving nozzle of the jet pump, there is arranged a heat exchanger, which is integrated with the jet pump, to which heat from the cathode exhaust gas can be supplied by an exchanger line. A fuel cell vehicle having a solid oxide fuel cell device is also provided.

First claim

1 . A solid oxide fuel cell device, comprising:
a fuel cell stack, with a fuel tank which is connected to the fuel cell stack at an anode side by an anode supply line, being associated with a jet pump into which an anode recirculation line empties, having a compressor which is connected to the fuel cell stack at the cathode side by a cathode supply line, being associated with an air preheater, through which a cathode exhaust gas line is led for the transfer of heat from the cathode exhaust gas, wherein, in the anode supply line, upstream from a driving nozzle of the jet pump, there is arranged a heat exchanger, which is integrated with the jet pump, to which heat from the cathode exhaust gas can be supplied by an exchanger line.

2 . The solid oxide fuel cell device according to claim 1 , wherein the exchanger line is formed as part of the cathode exhaust gas line.

3 . The solid oxide fuel cell device according to claim 1 , wherein the exchanger line branches off from the cathode exhaust gas line upstream from the air preheater and once again empties into the cathode exhaust gas line downstream from the air preheater.

4 . The solid oxide fuel cell device according to claim 1 , wherein the exchanger line branches off from the cathode exhaust gas line downstream from the air preheater and once again empties into the cathode exhaust gas line downstream from the air preheater.

5 . The solid oxide fuel cell device according to claim 1 , wherein the heat exchanger is formed by a heat transfer element situated in front of the driving nozzle, in which at least one fuel duct is formed and which stands in thermal connection with the cathode exhaust gas.

6 . The solid oxide fuel cell device according to claim 5 , wherein at least one cathode exhaust gas duct is formed in the heat transfer element.

7 . The solid oxide fuel cell device according to claim 5 , wherein the heat transfer element is configured with heat transfer fins and/or heatpipes, which stand in thermal connection with the cathode exhaust gas.

8 . A fuel cell vehicle having a solid oxide fuel cell device according to claim 1 .

Assignees

• Audi Ag
• Volkswagen Ag

Inventors

• Lucas Christian
• Heinrich Harald

Classifications

• H01M8/04029

  Heat exchange using liquids · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M8/04014 Primary

  Heat exchange using gaseous fluids; Heat exchange by combustion of reactants · CPC title

• H01M8/04097

  with recycling of the reactants (H01M8/04119, H01M8/04104 take precedence) · CPC title

• H01M2250/20

  Fuel cells in motive systems, e.g. vehicle, ship, plane · CPC title