Enphase Energy has been granted a patent for a method and system for AC battery operation. The technology involves determining the state of charge of the battery and communicating it between the battery management unit and power converter. This innovation aims to enhance battery performance and efficiency. GlobalData’s report on Enphase Energy gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Enphase Energy, Smart energy mgmt systems was a key innovation area identified from patents. Enphase Energy's grant share as of February 2024 was 80%. Grant share is based on the ratio of number of grants to total number of patents.
Ac battery operation method with bias control voltage communication
A recently granted patent (Publication Number: US11909246B2) discloses a method for AC battery operation that involves determining an equivalent series resistance estimation by analyzing ripple voltage and current in a battery management unit (BMU) connected to an AC battery system. This estimation helps in understanding the state of charge (SOC) process of the battery system. The BMU's bias control module then communicates this estimation to the power converter without the need for a control area network, providing information on the battery's state of health (SoH) or degradation. The method also involves adjusting current based on the battery's voltage levels and estimated ESR, synchronizing SOC values, and balancing voltage across all battery cells.
Furthermore, the patent claims detail additional features such as regulating battery output voltage, indicating fault conditions or readiness to charge, disconnecting the battery from the power converter when SOC is below a threshold, and attempting periodic reconnections. The method also involves using a bidirectional inverter as the power converter. The patent also covers an AC battery system comprising a rechargeable battery, a BMU for ESR estimation, and features for estimating actual battery voltage and observing battery voltage. These claims highlight the innovative approach to managing AC battery systems efficiently and ensuring optimal performance and longevity through advanced monitoring and control mechanisms.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
