US 12,476,479 B2
Hybrid battery system
Ramkumar Krishnan, Gilbert, AZ (US); and Shawn Fink, Mesa, AZ (US)
Assigned to FORM ENERGY, INC., Somerville, MA (US)
Filed by FORM ENERGY, INC., Somerville, MA (US)
Filed on Dec. 11, 2023, as Appl. No. 18/535,643.
Application 18/535,643 is a continuation of application No. 18/307,355, filed on Apr. 26, 2023, granted, now 12,191,702.
Application 18/307,355 is a continuation of application No. 16/332,431, granted, now 11,670,954, issued on Jun. 6, 2023, previously published as PCT/IB2017/055535, filed on Sep. 3, 2017.
Claims priority of provisional application 62/395,112, filed on Sep. 15, 2016.
Prior Publication US 2024/0396362 A1, Nov. 28, 2024
Int. Cl. H01M 10/46 (2006.01); H02J 7/00 (2006.01); H02J 7/34 (2006.01); H02J 7/35 (2006.01); H02J 9/06 (2006.01)
CPC H02J 7/34 (2013.01) [H02J 7/0013 (2013.01); H02J 7/0025 (2020.01); H02J 7/0048 (2020.01); H02J 7/0063 (2013.01); H02J 7/0071 (2020.01); H02J 7/00712 (2020.01); H02J 7/35 (2013.01); H02J 9/061 (2013.01); H02J 2300/24 (2020.01); H02J 2300/28 (2020.01); H02J 2310/12 (2020.01)] 18 Claims
 
1. A battery system comprising:
a first rechargeable battery unit having a first battery chemistry;
a second rechargeable battery unit having a second battery chemistry, the first and second battery chemistries different from each other;
a power supply voltage sensor operable to detect an operating voltage applied to a load from a power source; and
a control system configured for
selectively coupling the first rechargeable battery unit and the second rechargeable battery unit to the load for delivery of electrical energy from the battery system to the load during discharging,
selectively coupling the first rechargeable battery unit and the second rechargeable battery unit to the power source for charging of the battery system during charging,
receiving the operating voltage from the power supply voltage sensor,
selectively charging and discharging the first rechargeable battery unit and the second rechargeable battery unit based on the operating voltage,
determining whether the operating voltage is within a charge range and below a first charge threshold, and
charging the first rechargeable battery unit in response to determining that the operating voltage is within the charge range and below the first charge threshold.