Mazda Motor had 43 patents in batteries during Q4 2023. Mazda Motor Corp filed patents for a smoothing capacitor discharge system, a battery unit temperature management device with a changing structure for heat transfer capacity, a cooling system for an electric vehicle with a bypass route, and a battery unit temperature management device for multiple battery units with changing structures to reduce temperature differences. GlobalData’s report on Mazda Motor gives a 360-degreee view of the company including its patenting strategy. Buy the report here.
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Mazda Motor grant share with batteries as a theme is 55% in Q4 2023. Grant share is based on the ratio of number of grants to total number of patents.
Recent Patents
Application: Forced discharge control system for smoothing capacitor provided to inverter (Patent ID: US20230387713A1)
The patent filed by Mazda Motor Corp describes a forced discharge control system for a smoothing capacitor in a vehicle. The system includes components such as a drive battery, inverter, step-down converter, high-voltage circuit, and power supply switch. The system is designed to initiate first discharge control to consume electric charges of the smoothing capacitor by an in-vehicle component via a DC/DC converter when the battery is disconnected from the high-voltage circuit. Subsequently, second discharge control is executed to forcibly discharge the electric charges in an active discharge circuit once the voltage of the smoothing capacitor reaches a specified threshold. Additionally, delay control is implemented to postpone the execution timing of the second discharge control in cases of continuous forced discharge.
Furthermore, the system includes features such as a main resistor and energization switch in the active discharge circuit, a controller to manage the various components, and a passive discharge circuit with a sub-resistor. The delay control is activated after a specified number of repeated forced discharges or in case of abnormality detection in the step-down converter or cooling mechanism of the inverter. The system also allows for concurrent execution of first and second discharge controls, with the first discharge control being maintained even after the voltage of the smoothing capacitor reaches a certain limit. Additionally, the system is designed to operate efficiently in various vehicle configurations, such as with an engine in the front portion and a drive motor in the tunnel section of the floor panel.
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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.
