公开(公告)号：US20250128641A1

公开(公告)日：2025-04-24

申请号：US18490957

申请日：2023-10-20

Applicant: Caterpillar Inc.

Inventor： Timothy Beetler ,  Jose D. Miranda

IPC: B60L58/18 ,  B60L53/20 ,  H01M10/46 ,  H01M10/48 ,  H01M50/204 ,  H01M50/51 ,  H02J7/00

Abstract: A battery system includes a load bus to connect to a DC link, a single pre-charge circuit connected to the load bus, multiple battery packs, and a control circuit. Each battery pack includes multiple battery strings that include battery cells connected in series, a positive contactor to connect the battery string to the load bus, and a pre-charge contactor to connect the battery string to the pre-charge circuit. The control circuit selects a battery string to pre-charge the DC link, closes the pre-charge contactor of the battery string to connect the selected battery string to the pre-charge circuit, and opens the pre-charge contactor of the selected battery string to disconnect the battery string from the pre-charge circuit and close the positive contactor of the selected battery string to connect the battery string to the load bus when the DC link is pre-charged.

公开(公告)号：US20250132577A1

公开(公告)日：2025-04-24

申请号：US18490936

申请日：2023-10-20

Applicant: Caterpillar Inc.

Inventor： Timothy Beetler ,  Brian R. Bell ,  Jose D. Miranda ,  C. Brahm Landis

IPC: H02J7/00 ,  H01M10/42 ,  H01M50/51 ,  H02J7/14

Abstract: Various control systems and methods are discussed including a method of controlling a battery pack id disclosed, the method optionally including: providing a plurality of battery strings each having an identical construction, each battery string including a plurality of battery cells connected in series, wherein each of the plurality of battery strings is connected to a respective pair of contactors; providing a sensor configured to measure at least one of a voltage and a current of each of the plurality of battery strings, wherein respective sensor is electrically connected to an electronic controller; and selectively controlling individually ones of the plurality of battery strings to meet a requirement with the electronic controller based upon measurement from each sensor.