Samsung SDI has been granted a patent for a vehicle system that includes a battery, electric motor, switch, inertial sensor, controller, and switch driving circuit. The controller outputs a pulse width modulation (PWM) signal based on the acceleration magnitude, and the switch driving circuit generates a control current to control the switch. The patent also specifies that the duty ratio of the PWM signal decreases monotonically with acceleration magnitude within a certain range. GlobalData’s report on Samsung SDI 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 Samsung SDI, Hydrogen storage alloys was a key innovation area identified from patents. Samsung SDI's grant share as of September 2023 was 43%. Grant share is based on the ratio of number of grants to total number of patents.
Patent granted for vehicle acceleration control using pwm signal
A recently granted patent (Publication Number: US11772497B2) describes a vehicle and battery pack system with improved control over the switch between the battery and electric motor. The system includes an inertial sensor that measures acceleration and a controller that generates a pulse width modulation (PWM) signal based on the acceleration magnitude.
In the vehicle, the controller outputs a PWM signal with a duty ratio that decreases monotonically as the acceleration magnitude increases. The duty ratio ranges from a minimum value required to keep the switch closed to 100% when the acceleration magnitude is below a certain threshold. When the acceleration magnitude exceeds a second threshold but is below a third threshold, the controller sets a specific duty ratio greater than the minimum but less than 100%. If the acceleration magnitude is below the second threshold, the controller outputs a 100% duty ratio to close the switch, and if it exceeds the third threshold, a 0% duty ratio is output to open the switch. Additionally, in response to a collision signal from a collision sensor, the controller outputs a 0% duty ratio to open the switch.
The battery pack system operates similarly to the vehicle system. The battery controller receives the acceleration signal from the vehicle and generates a PWM signal with a duty ratio that decreases monotonically with increasing acceleration magnitude. The duty ratio ranges from the minimum required to keep the switch closed to 100% when the acceleration magnitude is below a first threshold. When the acceleration magnitude falls between a second and third threshold, the battery controller sets a specific duty ratio greater than the minimum but less than 100%. If the acceleration magnitude is below the second threshold, a 100% duty ratio is output to close the switch, and if it exceeds the third threshold, a 0% duty ratio is output to open the switch. In response to a collision information signal from a collision sensor, the battery controller outputs a 0% duty ratio to open the switch.
The patent also describes a vehicle that incorporates the battery pack system and an electric motor. The switch is connected between the battery and the electric motor, allowing the motor to be powered by the battery. The battery controller in the battery pack system receives the acceleration signal from the vehicle and generates a PWM signal with a duty ratio based on the acceleration magnitude of the longitudinal and lateral acceleration signals. The duty ratio is set to a specific value when either the longitudinal or lateral acceleration magnitude falls between a first and second threshold.
Overall, this patent presents a system for controlling the switch between a battery and electric motor in a vehicle or battery pack. The control is based on the acceleration magnitude, allowing for optimized performance and safety in various driving conditions.
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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.
