BMW has been granted a patent for a control unit for an energy accumulator that detects and analyzes charging/discharging events to determine discharge depth distribution. The unit adjusts the operating strategy based on this data, optimizing the performance of the energy accumulator. GlobalData’s report on Bayerische Motoren Werke 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 Bayerische Motoren Werke, Battery management systems was a key innovation area identified from patents. Bayerische Motoren Werke's grant share as of January 2024 was 39%. Grant share is based on the ratio of number of grants to total number of patents.

Control unit for energy accumulator monitoring and management

Source: United States Patent and Trademark Office (USPTO). Credit: Bayerische Motoren Werke AG

A recently granted patent (Publication Number: US11888339B2) discloses a control unit for an energy accumulator that is configured to monitor and analyze different discharging/charging events of the energy accumulator during operation. The control unit detects event data related to discharge depths, determines discharge depth distributions, and calculates state data based on this information. It can predict future discharge depth distributions, adapt operating strategies, and classify events into discharge depth groups. Additionally, the control unit can identify when the number of events in a specific range of discharge depths exceeds a maximum permissible number and adjust the operating strategy accordingly to reduce this occurrence.

Furthermore, the control unit can control the energy accumulator to decrease the distance measure between the discharge depth distribution and the discharge depth characteristic curve over time. The state data provided by the control unit includes information on the residual service life of the energy accumulator, the amount of maximum anticipated loading already used, and the expiration time for the duration of service. The control unit also applies weighting to events based on discharge depth to determine full-cycle-equivalent events and considers factors such as climatic conditions and user behavior in its analysis. Overall, the control unit offers a comprehensive approach to monitoring and optimizing the performance of energy accumulators, potentially extending their service life and efficiency.

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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.