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公开(公告)号:US11203267B2
公开(公告)日:2021-12-21
申请号:US16579124
申请日:2019-09-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Rashmi Prasad , Chandra S. Namuduri
Abstract: A dual-voltage charging station system for an alternating current (“AC”) power supply and a mobile platform having a charging port includes a charge coupler, an AC-to-DC conversion stage, a cable, and a controller. The charge coupler has AC pins and direct current (“DC”) pins configured to engage with respective AC and DC receptacles of the charging port. The conversion stage is connected to the charge coupler and the AC power supply, converts the supply voltage to a DC charging voltage, and relays an appropriate AC or DC accessory voltage. The cable connects to the charge coupler such that the AC pins receive the accessory voltage and the DC pins receive the DC charging voltage. The controller simultaneously delivers the accessory voltage and the DC voltage to the mobile platform via the AC pins and the DC pins, respectively.
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公开(公告)号:US11171571B2
公开(公告)日:2021-11-09
申请号:US16674576
申请日:2019-11-05
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Rashmi Prasad , Chandra S. Namuduri
IPC: H02M5/293 , H01L27/06 , H01L25/07 , H01L23/52 , H02M3/28 , H02M1/42 , G01R1/04 , H01L29/772 , H01L25/065
Abstract: An AC electronic solid-state switch includes an electrically insulating and thermally conductive layer, a first electrically conductive trace, a second electrically conductive trace, and a plurality of semiconductor dies each electrically connected to the first electrically conductive trace and the second electrically conductive trace. Each of the plurality of semiconductor dies forms a MOSFET, IGBT or other types of electronically controllable switch. The AC electronic solid-state switch further includes a common drain conductor that is electrically connected to each drain terminal of the plurality of semiconductor dies. The AC electronic solid-state switch is configured to block between 650 volts and 1700 volts in the off-state in a first direction and a second direction, the second direction being opposite the first direction, and the AC electronic solid-state switch is configured to carry at least 500 A continuously in the on-state with a voltage drop of less than 2V.
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公开(公告)号:US11071225B2
公开(公告)日:2021-07-20
申请号:US16656084
申请日:2019-10-17
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Chandra S. Namuduri , Rashmi Prasad
Abstract: An integrated smart relay assembly includes a case and an electronic solid-state switch disposed inside the case and a gate driver circuit electrically connected to the electronic solid-state switch. The gate driver circuit is configured to drive the electronic solid-state switch with a predetermined gate voltage and a predetermined gate current. The relay assembly further includes a protection circuit electrically connected to the gate driver circuit. The protection circuit is configured to protect the electronic solid-state switch against over-voltage, short circuit, and overheating. The relay assembly further includes a communication interface integrated with the electronic solid-state switch. Each of the protection circuit, electronic solid-state switch, and the communication interface is disposed inside the case.
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公开(公告)号:US10665398B1
公开(公告)日:2020-05-26
申请号:US16579103
申请日:2019-09-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Chandra S. Namuduri , Rashmi Prasad
Abstract: A switch assembly includes a case and a direct current (DC) electronic solid-state switch coupled to the case. The case covers the DC electronic solid-state switch, and the DC electronic solid-state switch has an on-state and off-state. The DC electronic solid-state switch blocks between 650 volts and 1200 volts in a single direction in an off-state. The DC electronic solid-state switch continuously carries at least 400 amperes direct current with a voltage drop of less than one volt. The DC electronic solid-state switch also includes a plurality of semiconductor dies each forming a MOSFET. The DC electronic solid-state switch also includes a plurality of signal conductors.
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公开(公告)号:US20190357386A1
公开(公告)日:2019-11-21
申请号:US15981190
申请日:2018-05-16
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Anthony M. Coppola , Alireza Fatemi , Rashmi Prasad
Abstract: A vascular polymeric assembly is provided which includes a heat source, a polymeric substrate configured to enclose and protect at least a portion of the heat source; and a channel defined in the polymeric substrate configured to transfer a heat flow away from the heat source via a channel coolant flow.
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公开(公告)号:US20250158553A1
公开(公告)日:2025-05-15
申请号:US18506454
申请日:2023-11-10
Applicant: GM Global Technology Operations LLC
Inventor: Rashmi Prasad , Chandra S. Namuduri , Junghoon Kim , Yilun Luo , Khorshed Mohammed Alam
IPC: H02P27/08 , B60L15/00 , B60L50/40 , B60R16/033
Abstract: A vehicle system includes a first battery pack connected to a second battery pack via a flying capacitor multi-level inverter. The fling capacitor inverter has multiple inverter legs, with each inverter leg being arranged in a flying capacitor topology. A three phase motor is connected to the inverter. A controller connected to the motor and the inverter. The controller includes a memory storing instructions configured to cause the controller to control the inverter as a direct current (DC)-DC converter such that a circulating current passes through the motor, the first battery pack and the second battery pack.
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公开(公告)号:US20250107051A1
公开(公告)日:2025-03-27
申请号:US18474637
申请日:2023-09-26
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Yilun Luo , Ronald O. Grover, JR. , Sanjeev M. Naik , Chandra S. Namuduri , Rashmi Prasad , Junghoon Kim , Peng Peng
IPC: H05K7/20
Abstract: Embodiments of the present disclosure are directed to power module cooling systems. In particular, some embodiments of the present disclosure relate to power module cooling systems with structures to generate three-dimensional swirling and tumbling in liquid coolant flowing within a chamber of the cooling system. Other embodiments may be disclosed or claimed.
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公开(公告)号:US20240429713A1
公开(公告)日:2024-12-26
申请号:US18339606
申请日:2023-06-22
Applicant: GM Global Technology Operations LLC
Inventor: Chandra S. Namuduri , Rashmi Prasad , Suresh Gopalakrishnan , Yilun Luo , Khorshed Mohammed Alam , Minh-Khai Nguyen
Abstract: An electric vehicle includes a drive system that performs a method of transferring power between a vehicle and an external location. The drive system includes a battery, a rectifier, and a processor. The rectifier is one of a two-level rectifier and a multi-level rectifier. The processor is configured to connect the rectifier between an alternating current (AC) port of an outlet of an external location and the battery. The rectifier is configured to convert between an AC power at the AC port on an external side of the rectifier and a direct current (DC) power at a vehicle side of the rectifier in order to transfer power bi-directionally between the external location and the battery.
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公开(公告)号:US20240339990A1
公开(公告)日:2024-10-10
申请号:US18296478
申请日:2023-04-06
Applicant: GM Global Technology Operations LLC
Inventor: Chandra S. Namuduri , Rashmi Prasad , Muhammad Hussain Alvi
CPC classification number: H03K3/017 , H02J7/0029 , H02J7/0047 , H02J7/0063 , H02M1/0009 , H02J2207/20
Abstract: Power converters on a vehicle may provide electrical power to propulsion and non-propulsion vehicle systems from a battery source. Power converters may include DC link capacitors. An electronically resettable fuse may pass electric current between the battery source and the power converters through a switch module. The switch module may be controlled in a pre-charge mode and a circuit protection mode, wherein the pre-charge mode limits a rate of charging of the DC link capacitor by controlling the electric current with the switch module.
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公开(公告)号:US20240162727A1
公开(公告)日:2024-05-16
申请号:US17988000
申请日:2022-11-16
Applicant: GM Global Technology Operations LLC
Inventor: Chandra S. Namuduri , Suresh Gopalakrishnan , Lei Hao , Venkata Prasad Atluri , Rashmi Prasad
CPC classification number: H02J7/00304 , B60L50/60 , B60L53/14 , B60L53/60 , H01M10/425 , H01M10/441 , H01M50/583 , H02J7/0013 , H02J7/0063 , H02J7/0068 , H01M2200/103 , H01M2220/20
Abstract: An electric vehicle includes an electrical system and performs a method of charging the electric vehicle. The electrical system includes a first battery subpack, a second battery subpack, wherein the first battery subpack, the second battery subpack, and an electrical load of the electric vehicle are connected in parallel, and a processor. The processor is configured to control a first connection between the first battery subpack and a first charge port and a second connection between the second battery subpack and a second charge port to charge each of the first battery subpack and the second battery subpack while providing power to the electrical load.
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