Lear has patented an on-board charger that efficiently converts AC voltage to DC voltage to charge a battery. The processor adjusts the voltage based on battery levels, ensuring optimal charging. The system maintains a constant voltage when AC voltage exceeds 140 Volts. GlobalData’s report on Lear 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 Lear, Battery management systems was a key innovation area identified from patents. Lear's grant share as of January 2024 was 64%. Grant share is based on the ratio of number of grants to total number of patents.

On-board charger for electric vehicles

Source: United States Patent and Trademark Office (USPTO). Credit: Lear Corp

A recently granted patent (Publication Number: US11878600B2) discloses an innovative on-board charger designed to efficiently convert alternating current (AC) voltage from an external power supply to a direct current (DC) voltage for charging batteries. The charger includes a first stage for initial conversion, a capacitor for providing a DC-Link voltage, a second stage for boosting the voltage to charge the battery, and a processor programmed to regulate the DC-Link voltage based on the AC voltage and battery voltage values. The processor adjusts the voltage between setpoints and sets it to a constant value when the AC voltage exceeds a threshold of 140 Volts AC, ensuring optimal charging performance.

Furthermore, the patent details a method for adjusting the DC-Link voltage in the on-board charger, emphasizing the progressive increase of voltage based on the battery voltage value. The method involves setting the voltage to a constant value when the AC voltage surpasses 140 Volts AC and adjusting it between setpoints according to the battery voltage level. The processor is programmed to respond to low and high-voltage thresholds by setting the voltage to specific setpoints, ensuring efficient and safe charging of batteries in various conditions. Overall, the patented technology aims to enhance the charging process for electric vehicles and other applications requiring reliable battery charging solutions.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

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.