An energy management unit (EMU) that integrates an on-board charger (OBC) and a battery management system (BMS), and optionally a DC-DC, to appear like a laboratory-based electrochemical impedance spectroscopy (EIS) device. A new high bandwidth charge control scheme and a new high voltage system architecture are disclosed. During vehicle AC charging, the OBC outputs a current that scans across various frequencies (typically 0.1 Hz to 10 kHz), while the BMS samples the voltage and current to create a Nyquist map of cell parameters (real impedance versus virtual impedance) without high frequency cell voltage sampling (which is not cost feasible for mobile and energy storage applications).

    一种能量管理单元(EMU),其集成了车载充电器(OBC)和电池管理系统(BMS)以及可选的DC‑DC,以表现得像基于实验室的电化学阻抗谱(EIS)装置。公开了新的高带宽充电控制方案以及新的高压系统架构。在车辆AC充电期间,OBC输出跨各种频率(典型地0.1Hz至10kHz)扫描的电流,同时BMS对电压和电流进行采样以创建电池单元参数的奈奎斯特图(真实阻抗对比虚拟阻抗),而没有高频电池单元电压采样(这对于移动和能量储存应用不是成本可行的)。


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    Title :

    Techniques for detecting battery cell degradation and impending battery pack failure using battery charger and battery management system


    Additional title:

    使用电池充电器和电池管理系统来检测电池单元劣化和即将发生的电池组故障的技术


    Contributors:

    Publication date :

    2024-11-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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