US 12,074,351 B2
Refuelling unit for refuelling fuel cell of hearing aid
Michael Frydendal Larssen, Veksoe (DK); Per Kokholm Sorensen, Virum (DK); Thorvaldur Oli Bodvarsson, Copenhagen S (IS); and Boris Valnert, Copenhagen V (DK)
Assigned to WIDEX A/S, Lynge (DK)
Appl. No. 17/257,420
Filed by WIDEX A/S, Lynge (DK)
PCT Filed Jul. 4, 2019, PCT No. PCT/EP2019/067976
§ 371(c)(1), (2) Date Dec. 31, 2020,
PCT Pub. No. WO2020/007972, PCT Pub. Date Jan. 9, 2020.
Claims priority of provisional application 62/694,629, filed on Jul. 6, 2018.
Claims priority of application No. PA 2018 00325 (DK), filed on Jul. 4, 2018.
Prior Publication US 2021/0280882 A1, Sep. 9, 2021
Int. Cl. H01M 8/04082 (2016.01); H01M 8/1011 (2016.01); H04R 25/00 (2006.01)
CPC H01M 8/04208 (2013.01) [H01M 8/1011 (2013.01); H04R 25/602 (2013.01); H01M 2250/30 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A refueling unit for refueling a fuel cell, said refueling unit comprising
a fuel cell receiving section having a fuel outlet adapted for being fluidly connected to an inlet of a fuel reservoir of a fuel cell, and waste inlet adapted for being fluidly connected to an outlet of said fuel reservoir of said fuel cell;
a cartridge receiving section having a fuel inlet adapted for being fluidly connected with an outlet of a cartridge comprising a fuel for refuelling said fuel cell;
wherein said refuelling unit is configured to receive through said waste inlet a waste fluid stored in the fuel reservoir of the fuel cell connected to said fuel cell receiving section,
wherein said refuelling unit further comprises an intermediate fuel reservoir for storing fuel, said intermediate fuel reservoir being fluidly connected to said fuel inlet of said cartridge receiving section and said fuel outlet of said fuel cell receiving section,
wherein said refuelling unit is configured to firstly receive in said intermediate fuel reservoir a predetermined amount of fuel from the cartridge connected to said cartridge receiving section and secondly empty said intermediate fuel reservoir and guide said fuel stored therein out of said fuel outlet of said fuel cell receiving section and into the fuel reservoir of the fuel cell connected to said fuel cell receiving section-,
wherein said refuelling unit further comprises an intermediate waste reservoir and a waste outlet,
wherein said intermediate waste reservoir is fluidly connected to said waste inlet of said fuel cell receiving section and said waste outlet, and
wherein said refueling unit is configured to receive the waste fluid through said waste inlet from the fuel reservoir of the fuel cell connected to said fuel cell receiving section by firstly receiving in said intermediate waste reservoir said waste fluid and secondly empty said intermediate waste reservoir and guide said waste fluid stored therein out of said waste outlet.