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.

公开(公告)号：US20240012059A1

公开(公告)日：2024-01-11

申请号：US17859193

申请日：2022-07-07

Applicant: Caterpillar Inc.

Inventor： Jose D. Miranda ,  Jason Lee Miller

IPC: G01R31/385 ,  H02M3/07 ,  B60R16/033 ,  G01R31/36 ,  H01M10/42 ,  H01M10/48

CPC classification number: G01R31/385 ,  H02M3/071 ,  B60R16/033 ,  G01R31/3644 ,  H01M10/425 ,  H01M10/482 ,  H01M2010/4271 ,  H01M2220/20

Abstract: A battery management system configured to couple to at least one battery module, the battery management system includes a contact configured to couple between the at least one battery module and a machine, a sensor configured to sense an electrical parameter of the at least one battery module, and a control circuit configured to receive an output of the sensor and determine a value of the electrical parameter. The sensor includes an inverting charge pump coupled to receive a positive supply voltage and generate a negative supply voltage, and a differential amplifier coupled to the at least one battery module and supplied by the positive supply voltage and the negative supply voltage, the differential amplifier configured to generate an output representing the electrical parameter.