POWER SUPPLY DEVICE, ELECTRIC VEHICLE PROVIDED WITH POWER SUPPLY DEVICE, AND POWER STORAGE DEVICE

    公开(公告)号:US20230150397A1

    公开(公告)日:2023-05-18

    申请号:US17758967

    申请日:2020-09-15

    CPC classification number: B60L58/22 B60L58/14 B60L58/26

    Abstract: A power supply device connects a plurality of battery modules (10) including a plurality of battery cells (1) by power line (42). Battery module (10) includes cell monitor circuit (6) that detects battery information, and a plurality of cell monitor circuits (6) provided in each battery module (10) are cascade-connected via communication line (44). Cell monitor circuit (6) includes communication interface (48) including connection parts (43) formed by connecting communication line (44), and communication interface (48) sets a withstand voltage applied to connection part (43) to be higher than an output voltage of the power supply device.

    ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY IN BATTERY MANAGEMENT SYSTEMS

    公开(公告)号:US20170219660A1

    公开(公告)日:2017-08-03

    申请号:US15328866

    申请日:2015-07-17

    Abstract: The invention pertains to a method of determining the State of Health (SoH) and/or State of Charge (SoC) of a rechargeable battery during use of said battery, the method comprising the steps of: generating a first excitation signal within a first selected frequency range, generating a second excitation signal within a second selected frequency range, applying said first and second excitation signals on said rechargeable battery, measuring the response signal for each of said two excitation signals, and then calculate the Electrochemical Impedance (EI) as the ratio between the excitation signals and respective response signals, and then determine the SoH and/or SoC of the rechargeable battery by comparing the calculated EI to a circuit model for the battery and/or determining the SoH and/or SoC of the rechargeable battery by directly evaluating characteristics of the EI. The invention also pertains to a battery management system configured for executing the steps of the method according to the invention.

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