US 12,266,953 B1
Dual chemistry rechargeable battery system for use in electric APU-equipped commercial trucks
Bruno Balocco, Long Beach, CA (US); and Kennon Guglielmo, San Antonio, TX (US)
Filed by EControls, LLC, San Antonio, TX (US)
Filed on Aug. 17, 2021, as Appl. No. 17/404,539.
Claims priority of provisional application 63/066,811, filed on Aug. 17, 2020.
Int. Cl. B60L 58/21 (2019.01); B64D 41/00 (2006.01); G01R 19/165 (2006.01); H02J 7/00 (2006.01)
CPC H02J 7/0014 (2013.01) [B60L 58/21 (2019.02); B64D 41/00 (2013.01); G01R 19/16566 (2013.01); B64D 2041/002 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An auxiliary electric battery system to be used with a vehicle having a primary electric battery system for powering at least the engine ignition system of the vehicle, wherein it is desirable for the primary electric battery system to retain a reserve ignition voltage in said primary electric battery system in order to enable engine ignition, said auxiliary battery system serving to help carry the electrical load carried by the primary electric battery system, wherein:
a. said auxiliary electric battery system comprises one or more electric batteries configured to provide a nominal voltage between a positive terminal and a negative terminal, the nominal voltage between said positive and negative terminals being comparable to the nominal voltage of the primary electric battery system;
b. said auxiliary electric battery system is electrically connected such that said positive and negative terminals are connected in parallel to said primary electric battery system;
c. said one or more electric batteries having an electric charge storing chemistry that enables a higher current draw than said primary electric battery system when connected in parallel to said primary electric battery system, thereby enabling preferential discharge of said one or more electric batteries relative to said primary electric battery system over a voltage range somewhere between the reserve ignition voltage for said primary electric battery system and the nominal voltage of said primary electric battery system, wherein said preferential discharge is enabled without the use of an isolator switch to cause the preferential discharge of said one or more electric batteries relative to said primary electric battery system; and
d. said primary electric battery is charged fully before charging said one or more electric batteries during a recharge cycle of said auxiliary electric battery system.