US 12,080,903 B2
Pressure management device for battery pack
Mark Kotik, Rochester Hills, MI (US); Adam Bisaro, Shelby Township, MI (US); Kevin Mitchell Lynk, Phoenix, AZ (US); Anthony Albert Heaton, Chandler, AZ (US); and Sebastian Schoch, Ingersheim (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE); and Nikola Corporation, Phoenix, AZ (US)
Appl. No. 17/600,022
Filed by Robert Bosch GmbH, Stuttgart (DE); Nikola Corporation, Phoenix, AZ (US); Mark Kotik, Rochester Hills, MI (US); Adam Bisaro, Shelby Township, MI (US); Kevin Mitchell Lynk, Phoenix, AZ (US); Anthony Albert Heaton, Chandler, AZ (US); and Sebastian Schoch, Ingersheim (DE)
PCT Filed Mar. 29, 2020, PCT No. PCT/US2020/025604
§ 371(c)(1), (2) Date Sep. 29, 2021,
PCT Pub. No. WO2020/214389, PCT Pub. Date Oct. 22, 2020.
Claims priority of provisional application 62/834,174, filed on Apr. 15, 2019.
Claims priority of provisional application 62/959,597, filed on Jan. 10, 2020.
Prior Publication US 2022/0255170 A1, Aug. 11, 2022
Int. Cl. H01M 50/209 (2021.01); H01M 50/271 (2021.01); H01M 50/317 (2021.01); H01M 50/572 (2021.01)
CPC H01M 50/209 (2021.01) [H01M 50/271 (2021.01); H01M 50/317 (2021.01); H01M 50/572 (2021.01); H01M 2220/20 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A battery pack comprising:
a battery pack housing having a lid joined to an open end via a fluid-impermeable seal;
a battery module disposed within the battery housing and comprising a plurality of electrochemical cells; and
a pressure compensation device positioned within the battery pack housing, the pressure compensation device comprising a first bladder fluidly coupled to a second bladder by a primary fitting,
wherein the battery pack housing is filled with a dielectric fluid, and
wherein the pressure compensation device comprises a second fluid.