US 11,894,517 B2
Acid stratification mitigation, electrolytes, devices, and methods related thereto
Daniel Wandera, Corvallis, OR (US); Robert Waterhouse, Lebanon, OR (US); Wyatt Self, Albany, OR (US); Eric B. Hostetler, Corvallis, OR (US); and Richard W. Pekala, Corvallis, OR (US)
Assigned to Amtek Research International LLC, Lebanon, OR (US)
Filed by AMTEK RESEARCH INTERNATIONAL LLC, Lebanon, OR (US)
Filed on Nov. 9, 2020, as Appl. No. 17/093,470.
Application 17/093,470 is a continuation of application No. PCT/US2019/031630, filed on May 9, 2019.
Claims priority of provisional application 62/726,856, filed on Sep. 4, 2018.
Claims priority of provisional application 62/726,854, filed on Sep. 4, 2018.
Claims priority of provisional application 62/669,076, filed on May 9, 2018.
Claims priority of provisional application 62/669,090, filed on May 9, 2018.
Prior Publication US 2021/0265660 A1, Aug. 26, 2021
Int. Cl. H01M 10/0565 (2010.01); H01M 50/417 (2021.01); H01M 50/446 (2021.01); H01M 10/0567 (2010.01); H01M 10/0569 (2010.01); H01M 50/449 (2021.01); H01M 50/414 (2021.01); H01M 50/42 (2021.01); H01M 50/423 (2021.01); H01M 50/457 (2021.01); H01M 50/491 (2021.01)
CPC H01M 10/0565 (2013.01) [H01M 10/0567 (2013.01); H01M 10/0569 (2013.01); H01M 50/414 (2021.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/423 (2021.01); H01M 50/446 (2021.01); H01M 50/449 (2021.01); H01M 50/457 (2021.01); H01M 50/491 (2021.01); H01M 2300/0011 (2013.01); H01M 2300/0091 (2013.01)] 20 Claims
 
1. A method of reducing acid stratification in a battery, the method comprising:
introducing an acid-soluble and acid-stable polymer into an aqueous electrolyte of a battery, to thereby increase the viscosity of the aqueous electrolyte;
wherein the acid-soluble and acid-stable polymer comprises at least one of:
polyvinyl pyrrolidone;
polyacrylamide;
copolymers comprising at least one of polyvinyl pyrrolidone or polyacrylamide; or
mixtures comprising at least one of polyvinyl pyrrolidone or polyacrylamide.