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    Diode fault detection
    2.
    发明授权
    Diode fault detection 有权

    公开(公告)号：US11239841B1

    公开(公告)日：2022-02-01

    申请号：US17193883

    申请日：2021-03-05

    Applicant: Wisk Aero LLC

    Inventor： Hongxia Chen ,  Rui Gao ,  Lewis Romeo Hom ,  Geoffrey Alan Long

    IPC: G01R31/26 ,  G01R31/40 ,  G01R19/12 ,  G01R19/165 ,  H03K17/74 ,  H03K17/082

    Abstract: A power delivery system includes a controller, configured to receive a voltage indication signal indicating a measured voltage of a battery management system and to determine whether first and second diodes of the battery management system are faulty based on the voltage indication signal. The controller is also configured to respectively receive first and second current indication signals from first and second current sensors of the battery management system and to determine whether the first and second diodes of the first battery management system are faulty based on the first and second current indication signals.

    Cell matching across multiple characteristics during battery assembly
    4.
    发明授权
    Cell matching across multiple characteristics during battery assembly 有权

    公开(公告)号：US11467216B2

    公开(公告)日：2022-10-11

    申请号：US16287882

    申请日：2019-02-27

    Applicant: Wisk Aero LLC

    Inventor： Lewis Romeo Hom ,  Thomas P. Muniz ,  Patrick K. Herring

    IPC: G01R31/367 ,  H01M10/42 ,  H01M6/50 ,  H01M10/48 ,  G06F7/08 ,  G01R31/396 ,  H01M10/04

    Abstract: For each cell in a plurality of cells from a same manufacturing run, a first and a second cell characteristic are received in order to obtain a plurality of cell characteristics. For each cell, a batch compatibility number that is associated with a number of compatible cells that that cell is compatible with is determined based at least in part on the plurality of cell characteristics. The plurality of cells is sorted according to the batch compatibility numbers to obtain a sorted list of cells. A plurality of compatible cells to include in a battery is selected from the plurality of cells, including by evaluating the plurality of cells according to the order of the sorted list of cells and beginning with the lowest batch compatibility number.

    POWER DISTRIBUTION CIRCUITS FOR ELECTRICALLY POWERED AIRCRAFT
    5.
    发明申请
    POWER DISTRIBUTION CIRCUITS FOR ELECTRICALLY POWERED AIRCRAFT 有权

    公开(公告)号：US20220127011A1

    公开(公告)日：2022-04-28

    申请号：US17202855

    申请日：2021-03-16

    Applicant: Wisk Aero LLC

    Inventor： Geoffrey Alan Long ,  Lewis Romeo Hom

    IPC: B64D31/00 ,  B64D27/24 ,  B60L50/60 ,  H02J4/00

    Abstract: A power distribution circuit for an electrically powered aircraft includes a plurality of batteries and a plurality of electric propulsion systems. A plurality of isolated power distribution circuits each couple a battery of the plurality of batteries to two or more electric propulsion systems. The plurality of electric propulsion systems are positioned on the aircraft to apply balanced forces to the aircraft such that in the event of a failure, the aircraft remains stable and only experiences a loss in altitude or speed.

    INTER-MODULE BATTERY BALANCING USING VOLTAGES TO SELECT BATTERY SUB-MODULES TO POWER LOADS
    6.
    发明申请
    INTER-MODULE BATTERY BALANCING USING VOLTAGES TO SELECT BATTERY SUB-MODULES TO POWER LOADS 有权

    公开(公告)号：US20220014028A1

    公开(公告)日：2022-01-13

    申请号：US17395391

    申请日：2021-08-05

    Applicant: Wisk Aero LLC

    Inventor： Scott Furman ,  Lewis Romeo Hom

    IPC: H02J7/00

    Abstract: One or more battery sub-modules are selected by obtaining at least one voltage from each battery sub-module and selecting based at least in part on the obtained voltages. The battery sub-modules are electrically connected in series in order to provide power to a primary load. Each battery sub-module includes a plurality of cells electrically connected in series and each battery sub-module further includes a battery management system that monitors the cells in that battery sub-module. Those battery management systems in the selected sub-modules are turned off so that the battery management systems in the selected sub-modules do not consume power at least temporarily from the cells in the selected sub-modules while (1) the battery sub-modules are not providing power to the primary load and (2) the battery sub-modules are not being charged.

    Estimation of self discharge rate as a measure of battery health
    10.
    发明授权
    Estimation of self discharge rate as a measure of battery health 有权

    公开(公告)号：US11721847B1

    公开(公告)日：2023-08-08

    申请号：US17534401

    申请日：2021-11-23

    Applicant: Wisk Aero LLC

    Inventor： Lewis Romeo Hom ,  Dhruv Rathi

    IPC: H01M10/48 ,  G01R31/36 ,  G01R31/3828 ,  G01R31/3842 ,  H01M10/42

    CPC classification number: H01M10/48 ,  G01R31/3648 ,  G01R31/3828 ,  G01R31/3842 ,  H01M10/425

    Abstract: Various embodiments of a technique to estimate and monitor a self-discharge rate for use as a measure of battery health are described herein. In some embodiments, the technique includes a system including a processor and a memory coupled with the processor. The memory is configured to provide the processor with instructions that when executed cause the processor to receive a plurality of snapshots obtained by monitoring a battery system in a quiescent state at a plurality of times. Each snapshot includes a plurality of cell state values at one of the plurality of times. The memory is further configured to provide the processor with instructions that when executed cause the processor to estimate a self-discharge indicator using at least one snapshot in the plurality of snapshots, compare the self-discharge indicator to a threshold, and recommend a remedy for the battery system in response to the self-discharge indicator exceeding the threshold.

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