公开(公告)号：US20240100990A1

公开(公告)日：2024-03-28

申请号：US17950545

申请日：2022-09-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Sangam Rawat ,  Davis H. Rossman ,  Yanyan Zhang ,  Kris Sevel ,  Chetan Powar

IPC: B60L58/12 ,  B60L50/60 ,  B60L53/00 ,  B60L58/26 ,  H02J7/00

CPC classification number: B60L58/12 ,  B60L50/60 ,  B60L53/00 ,  B60L58/26 ,  H02J7/0048 ,  H02J7/007192

Abstract: A method, system, and motor vehicle for controlling a direct-current fast-charging process of a battery system are provided that significantly improves performance of the direct-current fast-charging process and minimizes condensation issues by utilizing lower coolant temperature for a short duration when a rechargeable energy storage system cell temperature is greater than a specific temperature threshold. The rechargeable energy storage system cell temperature, a rechargeable energy storage system state of charge a rechargeable energy storage system voltage, and a rechargeable energy storage system direct-current fast-charging current are utilized to determine when to utilize the lower coolant temperature when the rechargeable energy storage system cell temperature is greater than a specific temperature threshold instead of using a lower coolant temperature from the beginning of the direct-current fast-charging process.