US 11,942,654 B2
Dual electrolyte electrochemical cells, systems, and methods of manufacturing the same
Ricardo Bazzarella, Woburn, MA (US); and Junzheng Chen, Concord, MA (US)
Assigned to 24M Technologies, Inc., Cambridge, MA (US)
Filed by 24M Technologies, Inc., Cambridge, MA (US)
Filed on Mar. 10, 2023, as Appl. No. 18/120,029.
Application 18/120,029 is a continuation of application No. 16/913,734, filed on Jun. 26, 2020, granted, now 11,631,920.
Claims priority of provisional application 62/867,306, filed on Jun. 27, 2019.
Prior Publication US 2023/0369719 A1, Nov. 16, 2023
Int. Cl. H01M 50/30 (2021.01); H01M 10/0587 (2010.01); H01M 50/183 (2021.01); H01M 50/20 (2021.01); H01M 50/502 (2021.01)
CPC H01M 50/394 (2021.01) [H01M 10/0587 (2013.01); H01M 50/183 (2021.01); H01M 50/20 (2021.01); H01M 50/502 (2021.01)] 22 Claims
OG exemplary drawing
 
1. A method of degassing an electrochemical cell stack, comprising:
placing an electrochemical cell stack on a bottom pouch, the electrochemical cell stack including a plurality of electrochemical cells, each electrochemical cell comprising an anode, a cathode, an anode degassing port fluidically coupled to the anode, and a cathode degassing port fluidically coupled to the cathode;
joining a top pouch to the bottom pouch to form a cased electrochemical cell stack, the top pouch including a stack compartment and at least two degassing compartments, the stack compartment encasing the electrochemical cell stack;
sealing around a perimeter of the cased electrochemical cell stack to fluidically isolate the anode of each electrochemical cell from the cathode of each electrochemical cell;
applying a vacuum to the cased electrochemical cell stack, the vacuum operable to (a) draw gas from the anode of each electrochemical cell into a first degassing compartment of the at least two degassing compartments, and (b) draw gas from the cathode of each electrochemical cell into a second degassing compartment of the at least two degassing compartments;
applying a seal between each electrochemical cell and the first degassing compartment and between each electrochemical cell and the second degassing compartment; and
removing the at least two degassing compartments from the cased electrochemical cell stack to form a degassed electrochemical cell stack.