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公开(公告)号：US20250042283A1
公开(公告)日：2025-02-06
申请号：US18228092
申请日：2023-07-31
Applicant: Rivian IP Holdings, LLC
Inventor： Puneeth Srikanta Murthy , Lixiang Wei , Steven Schulz
Abstract: Systems and methods for operating a PEM including control circuitry are provided herein. The operation includes detecting, using the control circuitry, a drop in output current of the PEM, detecting, using the control circuitry, an increase in output voltage of the PEM, and in response to detecting the drop in output current and detecting the increase in output voltage, turning off the PEM using the control circuitry. Turning off the PEM may protect circuitry of the PEM from an interruption of a continuous power flow.
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公开(公告)号：US20230182586A1
公开(公告)日：2023-06-15
申请号：US17546146
申请日：2021-12-09
Applicant: Rivian IP Holdings, LLC
Inventor： Ming Li , Yang Liu , Tyler Erikson , Lixiang Wei , Steven E. Schulz
Abstract: A direct current fast charge (DCFC) system and associated method that lower standby power dramatically when the DCFC system is not in operation, and that provide a reset capability for communication needs. The DCFC system utilizes an appropriate load disconnection switch and an associated control and communication circuit, timer circuit, and automatic turn on system. This improves the reliability of the electronics by removing voltage stress during the standby mode. The DCFC system prevents energy waste, and therefore provides a “green” alternative to conventional DCFC systems.
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3.发明公开公开(公告)号：US20240190271A1
公开(公告)日：2024-06-13
申请号：US18062880
申请日：2022-12-07
Applicant: Rivian IP Holdings, LLC
Inventor： Ming Li , Lixiang Wei , Steven Schulz , Puneeth Kumar Srikanta Murthy
Abstract: Aspects of this technical solution can a first direct-current (DC) circuit to couple with a DC battery of an electric vehicle, a capacitor of the first DC circuit configured to charge to a capacitance that satisfies a threshold of activation of a second DC circuit, and the first DC circuit to transmit, in response to a determination that the capacitor satisfies the threshold of activation of the second DC circuit, DC power between the battery of the electric vehicle and the second DC circuit.
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4.发明公开公开(公告)号：US20230198393A1
公开(公告)日：2023-06-22
申请号：US17554938
申请日：2021-12-17
Applicant: Rivian IP Holdings, LLC
Inventor： Zahra Mohajerani , Lixiang Wei , Shenli Zou
Abstract: Systems, methods, and computer-readable media for controlling a dual active bridge converter to distribute switching losses are disclosed herein. A plurality of switch control signals are provided to a plurality of switches, respectively, of at least one bridge of a dual active bridge converter. The plurality of switches comprises top switches and bottom switches. Control circuitry causes the plurality of switch control signals to switch according to a switching sequence comprising a plurality of stages. During at least one of the plurality of stages, the top switches are enabled concurrently with one another or the bottom switches are enabled concurrently with one another.
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Patent Agency Ranking
公开(公告)号：US20230064783A1
公开(公告)日：2023-03-02
申请号：US17749492
申请日：2022-05-20
Applicant: RIVIAN IP HOLDINGS, LLC
Inventor： Shenli Zou , Zahra Mohajerani , Maziar Mobarrez , Lixiang Wei
Abstract: Systems and methods for controlling a dual active bridge converter are disclosed herein. Switch control signals are provided to respective switches of at least one bridge of a dual active bridge converter. Control circuitry causes the switch control signals to switch according to a first switching sequence. After causing the switch control signals to switch according to the first switching sequence, the control circuitry causes the switch control signals to switch according to a second switching sequence, distinct from the first switching sequence, to distribute switching losses among the switches.
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公开(公告)号：US12107507B2
公开(公告)日：2024-10-01
申请号：US17749492
申请日：2022-05-20
Applicant: RIVIAN IP HOLDINGS, LLC
Inventor： Shenli Zou , Zahra Mohajerani , Maziar Mobarrez , Lixiang Wei
CPC classification number: H02M3/33573 , H02M1/0054 , H02M3/33576
Abstract: Systems and methods for controlling a dual active bridge converter are disclosed herein. Switch control signals are provided to respective switches of at least one bridge of a dual active bridge converter. Control circuitry causes the switch control signals to switch according to a first switching sequence. After causing the switch control signals to switch according to the first switching sequence, the control circuitry causes the switch control signals to switch according to a second switching sequence, distinct from the first switching sequence, to distribute switching losses among the switches.
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公开(公告)号：US20240186885A1
公开(公告)日：2024-06-06
申请号：US18060733
申请日：2022-12-01
Applicant: Rivian IP Holdings, LLC
Inventor： Puneeth Kumar Srikanta Murthy , Ming Li , Lixiang Wei , Steven Schulz , Walter Axel Franck
CPC classification number: H02M1/10 , B60L53/22 , B60L53/62 , B60L53/66 , H02M1/0006 , H02M1/32 , H02M1/36
Abstract: Energy conversion is provided. An energy conversion device can include one or more power delivery interfaces. The energy conversion device can include a pre-charge circuit configured to charge a capacitor to an operating voltage. The energy conversion device can include a user accessible interface configured to provide energy to the pre-charge circuit. The pre-charge circuit can charge the capacitor associated with the one or more power delivery interfaces. The user-accessible interfaces can include a direct current (DC) input. The user-accessible interfaces can include an alternating current (AC) input.
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公开(公告)号：US20240154534A1
公开(公告)日：2024-05-09
申请号：US17984092
申请日：2022-11-09
Applicant: Rivian IP Holdings, LLC
Inventor： Yanjun Shi , Zahra Mohajerani , Lixiang Wei , Mohammad Nanda R. Marwali
IPC: H02M3/335
CPC classification number: H02M3/33584 , H02M3/3353
Abstract: Systems and methods for controlling a dual active bridge converter are disclosed herein. A bus voltage of a dual active bridge (DAB) converter is detected and a first duty ratio of a primary bridge and a second duty ratio of a secondary bridge are determined, at least one of the first duty ratio and the second duty ratio are modified by adjusting at least one of a differential mode (DM) adjustment variable and a common mode (CM) adjustment variable based on the detected bus voltage. A plurality of switch control signals, which are provided to respective switches of the primary bridge and the secondary bridge, are caused to switch according to a time-based switching sequence based on the first duty ratio and the second duty ratio.
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公开(公告)号：US20240109448A1
公开(公告)日：2024-04-04
申请号：US17955747
申请日：2022-09-29
Applicant: Rivian IP Holdings, LLC
Inventor： Aashiv Vij , Steven Schulz , Ming Li , Lixiang Wei
CPC classification number: B60L53/62 , B60L53/14 , G01R1/203 , G01R1/28 , H02J7/0031
Abstract: Monitoring isolation resistance to validate vehicle charger functionality is provided. A system can include a first one or more resistors connected to a first terminal of a first direct current bus of a charger. The charger can be configured to deliver power to a first electric vehicle. The system can include a controller comprising circuitry. The controller can be configured to determine a resistance at the first one or more resistors. The controller can control delivery of power to the first electric vehicle responsive to a comparison of the resistance at the first one or more resistors with a threshold.
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