US 12,412,911 B2
Fuel cell system having energy recuperation
Jochen Braun, Heimsheim (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 18/837,274
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Feb. 21, 2023, PCT No. PCT/EP2023/054283
§ 371(c)(1), (2) Date Aug. 9, 2024,
PCT Pub. No. WO2023/165847, PCT Pub. Date Sep. 7, 2023.
Claims priority of application No. 10 2022 202 175.4 (DE), filed on Mar. 3, 2022.
Prior Publication US 2025/0140882 A1, May 1, 2025
Int. Cl. H01M 8/04111 (2016.01); F01D 15/10 (2006.01); H01M 8/04007 (2016.01); H01M 8/04082 (2016.01)
CPC H01M 8/04111 (2013.01) [F01D 15/10 (2013.01); H01M 8/04067 (2013.01); H01M 8/04201 (2013.01); F05D 2220/76 (2013.01); H01M 2250/20 (2013.01); H01M 2250/402 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A fuel cell system (2, 62, 70, 72) comprising:
at least one fuel cell stack (6, 8) each having an anode inlet (40), an anode outlet (42), a cathode inlet (10), and a cathode outlet (12),
a turbine arrangement (14), and
an oxidant supply means for supplying an oxidant to the respective cathode inlet (10),
wherein the turbine arrangement (14) is arranged downstream of the respective cathode outlet (12) of at least one of the at least one fuel cell stack (6, 8, 64) and can be coupled to the cathode outlet (12),
wherein the turbine arrangement (14) comprises a shaft, at least one turbine (16, 18) which is connected to the shaft, and a generator (22) which is connected to the shaft (20),
wherein the oxidant supply means and the turbine arrangement (14) can be operated independently of each other,
wherein the generator (22) of the turbine arrangement (14) is configured as a motor/generator unit and drives the at least one turbine (16, 18) of the turbine arrangement (14) in an emergency operating mode in an event of failure of the oxidant supply means, by supplying an electrical voltage to the generator (22), and
wherein the at least one turbine (16, 18) is configured to supply air in a reverse flow direction to at least one of the at least one fuel cell stack (6, 8, 64) in a driven state.