FreeWire Technologies. has filed a patent for a method to control charging current in electric vehicles. The technology involves transitioning between operational modes based on trigger events to efficiently transfer power from a source battery to a target battery using a buck converter and a boost converter. GlobalData’s report on FreeWire Technologies 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 FreeWire Technologies, Battery management systems was a key innovation area identified from patents. FreeWire Technologies's grant share as of January 2024 was 56%. Grant share is based on the ratio of number of grants to total number of patents.

Electric vehicle charging current control method

Source: United States Patent and Trademark Office (USPTO). Credit: FreeWire Technologies Inc

The patent application (Publication Number: US20240025296A1) describes a method and system for controlling the charging current while transferring energy from a source battery to a target battery in an electric vehicle (EV). The method involves operating a buck converter at a fixed switching frequency in the first operational mode and transitioning to a variable switching frequency in response to trigger events. Additionally, a boost converter is activated in the third operational mode to regulate the charging current and compensate for any discrepancies between the desired and actual current levels.

Furthermore, the system includes a circuit with a buck converter, boost converter, and control circuitry to facilitate the energy transfer process. The control circuitry is designed to detect trigger events such as voltage differentials and duty cycle thresholds to switch between operational modes effectively. By deactivating the buck converter when no current flows through it, the system optimizes the energy transfer process in the electric vehicle. Overall, the method and system outlined in the patent application aim to enhance the efficiency and control of charging current during energy transfer between batteries in an electric vehicle, ultimately improving the performance and reliability of the EV system.

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