US 12,341,364 B2
Flash charging parallel battery packs separated by a high resistance interconnect
Julian Arlo Binder, Redwood City, CA (US); Brian Jonathan Loh, San Francisco, CA (US); and Meera Radhakrishnan, Mountain View, CA (US)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Mar. 24, 2022, as Appl. No. 17/703,144.
Prior Publication US 2023/0307926 A1, Sep. 28, 2023
Int. Cl. H02J 7/00 (2006.01); G02B 27/01 (2006.01)
CPC H02J 7/0018 (2013.01) [H02J 7/0042 (2013.01); H02J 7/0048 (2020.01); H02J 7/00714 (2020.01); G02B 27/017 (2013.01); H02J 2207/20 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A multi-battery flash charging system configured to reduce a power charging loss at a battery-operated device that includes multiple, distributed batteries, where reducing the power charging loss at the battery-operated device is achieved by generating a charge voltage at a charge voltage regulator, which is located externally relative to a housing of the battery-operated device, and by transmitting the charge voltage over a high resistance wire that couples the charge voltage regulator to the battery-operated device, said multi-battery flash charging system comprising:
a battery-operated device comprising:
a first linear charger collocated with and coupled to a first battery unit of the battery-operated device; and
a second linear charger collocated with and coupled to a second battery unit of the battery-operated device,
wherein the second battery unit is separated from the first battery unit within a housing of the battery-operated device such that the first battery unit and the second battery unit are distributed relative to one another in the housing of the battery-operated device;
a flash charger comprising a charge voltage regulator, wherein the flash charger is pluggable into a power grid to provide a rapid charging voltage to the battery-operated device to rapidly charge the first battery unit and the second battery unit, and wherein the flash charger, which includes the charge voltage regulator, is located externally relative to the housing of the battery-operated device; and
a high resistance wire that is detachable from the battery-operated device and that, when attached to the battery-operated device, is coupled to (i) the first linear charger, (ii) the second linear charger, and (iii) the charge voltage regulator, and wherein the rapid charging voltage is delivered from the externally located charge voltage regulator to the first linear charger and to the second linear charger via the high resistance wire.