US 12,074,352 B2
System for refuelling a hearing aid fuel cell
Per Kokholm Sorensen, Virum (DK); Boris Valnert, Frederikssund (DK); Thorvaldur Oli Bodvarsson, Copenhagen S (DK); Drew Rosskelly, Farum (DK); Michael Frydendal Larssen, Vekso (DK); and Rune Aarup Due, Copenhagen S (DK)
Assigned to Widex A/S, Lynge (DK)
Appl. No. 17/295,515
Filed by Widex A/S, Lynge (DK)
PCT Filed Dec. 2, 2019, PCT No. PCT/EP2019/083272
§ 371(c)(1), (2) Date May 20, 2021,
PCT Pub. No. WO2020/114953, PCT Pub. Date Jun. 11, 2020.
Claims priority of provisional application 62/776,229, filed on Dec. 6, 2018.
Prior Publication US 2022/0006108 A1, Jan. 6, 2022
Int. Cl. H01M 8/04082 (2016.01); H01M 8/1011 (2016.01)
CPC H01M 8/04208 (2013.01) [H01M 8/1011 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A system for refuelling a fuel cell, the system comprising
a cartridge having a first reservoir for storing fuel;
a refuelling unit adapted to receive a waste liquid from a fuel reservoir of the fuel cell and provide fuel from the first reservoir of the cartridge to the fuel reservoir of the fuel cell;
wherein the system further comprises a second reservoir for storing the waste liquid from the fuel cell, wherein the second reservoir comprises at least one evaporation opening connected to the surroundings, and is adapted to allow the waste liquid to evaporate from the second reservoir to the surroundings, and
wherein the second reservoir further comprises a filter medium configured to absorb the waste liquid, and wherein the waste liquid evaporates from the filter medium; and
a cover at least partly covering the evaporation opening, and adapted to prevent a user from coming into contact with the filter medium.