Broadcast of discharge current based on state-of-health imbalance between battery packs

    公开(公告)号:US11588334B2

    公开(公告)日:2023-02-21

    申请号:US17830140

    申请日:2022-06-01

    发明人: William Tenorio

    摘要: Systems and methods are described for managing charging and discharging of battery packs. In one or more aspects, a system and method are provided to minimize overcharging of battery cells of specific battery chemistries while still enabling fast charging cycles. In other aspects, a buck converter may be used to reduce a voltage of power used to charge the cells. In further aspects, a fast overcurrent protection circuit is described to address situations involving internal short circuits of a battery cell or battery pack. In yet further aspects, a bypass circuit is provided in series-connected battery packs to improve the charging of undercharged battery packs while also increasing the efficiency of the overall charging process. In other aspects, a circuit is provided that permits a controller to determine a configuration of battery packs. In yet further aspects, a system may determine a discharge current for a collection of battery packs based on each battery pack's state of health (SOH) and forward that determination to an external device.

    Large-Format Battery Managment System

    公开(公告)号:US20210376629A1

    公开(公告)日:2021-12-02

    申请号:US17395987

    申请日:2021-08-06

    摘要: A battery system with a large-format Li-ion battery powers attached equipment by discharging battery cells distributed among a plurality of battery packs. The discharging of the battery cells is controlled in an efficient manner while preserving the expected life of the Li-ion battery cells. Each battery pack internally supports a battery management system and may have identical components, thus supporting an architecture that easily scales to higher power/energy. Battery packs may be added or removed without intervention with a user, where one of battery packs serves as a master battery pack and the remaining battery packs serve as slave battery packs. When the master battery pack is removed, one of the slave battery packs becomes the master battery pack. Charging and discharging of the battery cells is coordinated by the master battery pack with the slave battery packs over a communication channel such as a controller area network (CAN) bus.

    BATTERY PACK POWER CONNECTOR
    4.
    发明公开

    公开(公告)号:US20240170807A1

    公开(公告)日:2024-05-23

    申请号:US18141592

    申请日:2023-05-01

    摘要: A medium- and/or large-format (M/L), rechargeable battery pack used for powering attached equipment may include features to protect the battery pack from external fire. For example, the features may protect the battery pack due to exposure to fire from outside of the end device, e.g., a vehicle, due to a fuel spill. According to another aspect of the embodiments, the M/L rechargeable battery pack may include a high current terminal/power connector for the battery pack. The embodiment optimizes the battery pack output power connector assembly, improves and solves poor connection designs that can cause fire hazards from sparks, and provides water ingress protection.

    Large-format battery management system with configuration list for master-slave battery packs

    公开(公告)号:US10944278B1

    公开(公告)日:2021-03-09

    申请号:US16937931

    申请日:2020-07-24

    摘要: A battery system with a large-format Li-ion battery powers attached equipment by discharging battery cells distributed among a plurality of battery packs. The discharging of the battery cells is controlled in an efficient manner while preserving the expected life of the Li-ion battery cells. Each battery pack internally supports a battery management system and may have identical components, thus supporting an architecture that easily scales to higher power/energy. Battery packs may be added or removed without intervention with a user, where one of battery packs serves as a master battery pack and the remaining battery packs serve as slave battery packs. When the master battery pack is removed, one of the slave battery packs becomes the master battery pack. Charging and discharging of the battery cells is coordinated by the master battery pack with the slave battery packs over a communication channel such as a controller area network (CAN) bus.