US 12,003,132 B2
Hybrid electric secondary power and battery charging architecture and control system
Todd A. Spierling, Rockford, IL (US); and Robert A. Bayles, Belvidere, IL (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on May 17, 2022, as Appl. No. 17/746,570.
Prior Publication US 2023/0378796 A1, Nov. 23, 2023
Int. Cl. H02J 7/00 (2006.01); B60L 53/20 (2019.01); B64D 27/24 (2006.01); H02J 7/02 (2016.01); B64D 27/02 (2006.01)
CPC H02J 7/007182 (2020.01) [B60L 53/20 (2019.02); B64D 27/24 (2013.01); H02J 7/0048 (2020.01); H02J 7/02 (2013.01); B60L 2210/30 (2013.01); B64D 27/026 (2024.01); H02J 2207/20 (2020.01)] 19 Claims
OG exemplary drawing
 
1. An aircraft hybrid electrical system comprising:
an electric power generating system in signal communication with a thermal combustion engine, the electric power generating system comprising:
a motor generator configured to generate an alternating current (AC) voltage;
a motor controller and rectifier configured to rectify the AC voltage to generate a direct current (DC) voltage;
a battery system including a battery in signal communication with the electric power generating system to receive the DC voltage and in signal communication with the secondary power system to deliver a DC battery voltage, the battery system configured to interchange the battery of a first type with a second battery of a second type different from the battery of the first type;
a secondary power system in signal communication with the electric power generating system and the battery system, the secondary power system configured to convert at least one of the DC voltage and the DC battery voltage into a converted DC voltage configured to drive an aircraft load; and
a system controller in signal communication with the electric power generating system, the secondary power system, and the battery, the system controller configured to monitor the DC voltage, the DC battery voltage, and the converted DC voltage, and to control the motor controller and rectifier to adjust a voltage of the DC voltage,
wherein the system controller is configured to store a first charging profile corresponding to the battery of the first type and a second charging profile different corresponding to the second battery of the second type, the system controller configured to monitor a charge capacity of the battery and selectively operate in a current charge mode and a voltage charge mode to charge the battery of the first type according to the first charging profile,
wherein the system controller is configured to invoke the current charge mode in response to detecting the charge capacity falls below a charge capacity threshold and is configured to transition into the voltage charge mode in response to detecting the charge capacity reaches a target value to maintain the battery at a constant target cell voltage,
wherein the controller is configured to detect that the battery of the first type is interchanged with the second battery of the second type, and is configured to selectively operate in a current charge mode and a voltage charge mode to charge the second battery of the second type according to the second charging profile.