US 12,412,910 B2
Thermal transfer in the cathode path of a fuel cell system by means of the evaporation/condensation of product water
Jochen Braun, Heimsheim (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 18/012,332
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Jun. 17, 2021, PCT No. PCT/EP2021/066493
§ 371(c)(1), (2) Date Dec. 22, 2022,
PCT Pub. No. WO2021/259767, PCT Pub. Date Dec. 30, 2021.
Claims priority of application No. 10 2020 207 747.9 (DE), filed on Jun. 23, 2020.
Prior Publication US 2023/0307670 A1, Sep. 28, 2023
Int. Cl. H01M 8/04 (2016.01); H01M 8/04007 (2016.01); H01M 8/04014 (2016.01); H01M 8/04082 (2016.01); H01M 8/04111 (2016.01)
CPC H01M 8/04059 (2013.01) [H01M 8/04014 (2013.01); H01M 8/04111 (2013.01); H01M 8/04201 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fuel cell system (100), comprising:
at least one fuel cell (101),
and a cathode path (10) for providing the at least one fuel cell (101) with an oxygen-containing reactant in the form of supply air (L1),
wherein the cathode path (10) comprises
a supply air line (11) for providing the at least one fuel cell (101) with the supply air (L1),
and an exhaust air line (12) for discharging exhaust air (L2) from the at least one fuel cell (101),
and wherein at least one heat exchanger (20) is provided between the supply air line (11) and the exhaust air line (12) of the cathode path (10) to transfer thermal energy from the supply air (L1) to the exhaust air (L2),
characterized in that
the heat exchanger (20) is configured to transfer the heat by evaporation and condensation of product water (H2O) and by means of a plurality of streams (M1, M2) of the supply air (L1) through the heat exchanger (20) to a stream (M3) of the exhaust air (L2) through the heat exchanger (20).