US 11,745,619 B2
Multiple chemistry battery systems for electric vehicles
Richard Edward Botts, Griffin, GA (US); Blakely Lane Fabiani, Auburn, AL (US); and David S. Merrill, Macon, GA (US)
Assigned to PREMERGY, INC, Macon, GA (US)
Filed by Premergy, Inc., Macon, GA (US)
Filed on Apr. 17, 2020, as Appl. No. 16/851,388.
Application 16/851,388 is a continuation of application No. 16/172,300, filed on Oct. 26, 2018, granted, now 10,661,679.
Prior Publication US 2020/0247269 A1, Aug. 6, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H02P 1/00 (2006.01); B60L 58/19 (2019.01); H01M 10/0525 (2010.01); H02J 7/00 (2006.01); B60L 58/12 (2019.01); H01M 10/48 (2006.01)
CPC B60L 58/19 (2019.02) [B60L 58/12 (2019.02); H01M 10/0525 (2013.01); H01M 10/48 (2013.01); H02J 7/0042 (2013.01); H02J 7/0068 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electric drive system comprising:
a first drive motor configured to impart motion to one or more wheels of the electric drive system;
a second drive motor configured to impart motion to one or more wheels of the electric drive system;
a plurality of batteries configured to power the first drive motor and the second drive motor, the plurality of batteries comprising:
a first battery comprising a first cell having a first chemistry; and
a second battery comprising a second cell having a second chemistry different from the first chemistry; and
one or more controllers configured to:
cause the first battery and the second battery to power the first drive motor at a first instance;
cause the first battery and the second battery to power the second drive motor at a second instance;
cause the first battery to power the first drive motor and the second drive motor at a third instance; and
cause the second battery to power the first drive motor and the second drive motor at a fourth instance; and
one or more switches or transistors electrically coupled to the first battery and the second battery, the one or more switches or transistors configured to transition between a first state in which the one or more switches or transistors form a series connection between the first battery and the second battery and a second state in which the one or more switches or transistors form a parallel connection between the first battery and the second battery.