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公开(公告)号：US20240243596A1
公开(公告)日：2024-07-18
申请号：US18096592
申请日：2023-01-13
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rashmi PRASAD , Mohamed Ahmed Kamel AHMED , Chandra S. NAMUDURI , Jun-mo KANG
CPC classification number: H02J7/0063 , B60L50/60 , H02M3/003 , H05K7/20845 , B60L2210/10 , H02J2207/20
Abstract: A battery system for a vehicle includes multiple battery cells each configured to store charge for powering an electric vehicle, a high voltage bus electrically coupled with the multiple battery cells to provide power to an electric motor, and multiple cell monitoring modules each coupled with a corresponding one of the multiple battery cells, each cell monitoring module including a controller configured to monitor operation parameters of the corresponding one of the multiple battery cells. The system includes multiple DC-DC converters in a converter housing, each DC-DC converter electrically coupled with a corresponding one of the multiple battery cells outside of the converter housing, and a low voltage bus electrically connected between the multiple DC-DC converters in the converter housing and at least one vehicle electrical component outside of the converter housing. The low voltage bus is configured to provide low voltage power to at least one vehicle electrical component.
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12.发明公开公开(公告)号：US20240239236A1
公开(公告)日：2024-07-18
申请号：US18097379
申请日：2023-01-16
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. NAMUDURI , Mohamed Ahmed Kamel AHMED , Muhammad Hussain ALVI , Suresh GOPALAKRISHNAN
IPC: B60L58/18
CPC classification number: B60L58/18 , B60L2210/10 , B60L2240/525 , B60L2240/527 , B60L2240/529
Abstract: An energy storage system includes a plurality of batteries coupled in series, a plurality of DC-DC power converters each having first and second sides, a DC bus coupled to the second sides of the DC-DC power converters, and at least one controller coupled to at least one DC-DC power converter. Each of the DC-DC power converters is configured to operate in a plurality of operating modes. The at least one controller configured to receive a plurality of operating characteristics of the at least one DC-DC power converter and a plurality of setpoints, select an operating mode of the plurality of operating modes for the at least one DC-DC power converter, and control the at least one DC-DC power converter to operate in the selected operating mode based on at least one of the operating characteristics and at least one of the setpoints.
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公开(公告)号：US20230344293A1
公开(公告)日：2023-10-26
申请号：US17729216
申请日：2022-04-26
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rashmi PRASAD , Chandra S. NAMUDURI , Lei HAO , Suresh GOPALAKRISHNAN
Abstract: A method includes: selectively actuating switches of an inverter module and first, second, third, and fourth switches of a motor; and charging a battery with power from a charger using at least one of first, second, and third stator windings of the motor, the battery having a first voltage and being electrically connected in parallel with the inverter module, and the charger having a second voltage that is less than the first voltage.
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公开(公告)号：US20210111648A1
公开(公告)日：2021-04-15
申请号：US16597098
申请日：2019-10-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Lei HAO , Chandra S. NAMUDURI
Abstract: A system includes a position sensor configured to detect positions of a rotor of a starter motor relative to the position sensor and to output signals indicating the detected positions and a controller configured to rotate the rotor to a plurality of predetermined positions relative to a stator of the starter motor, determine sensed positions of the rotor based on the signals output by the position sensor, and calculate an initial detected position of the rotor based on relationships between the determined sensed positions of the rotor and an expected angular distance between adjacent ones of the predetermined positions.
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公开(公告)号：US20180258900A1
公开(公告)日：2018-09-13
申请号：US15452312
申请日：2017-03-07
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. NAMUDURI , Lei HAO , Thomas W. NEHL
IPC: F02N11/08
CPC classification number: F02N11/0848 , F02N11/08 , F02N11/0862 , F02N15/023 , F02N15/067 , F02N2011/0896 , F02N2200/041 , F02N2200/044 , F02N2200/047 , F02N2300/108
Abstract: A vehicle propulsion system includes an engine configured to be selectively activated to provide torque to propel the vehicle and a starter module coupled to the engine and configured to start the engine from an inactive state. The starter module includes a brushless electric machine to generate an output torque to crank start the engine. The starter motor also includes a pinion gear coupled to the electric machine, where the pinion gear is actuatable to selectively engage a cranking input of the engine. A controller assembly is programmed to cause actuation of the pinion gear to engage the cranking input of the engine and transfer a cranking torque to activate the engine.
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Patent Agency Ranking
公开(公告)号：US20170033716A1
公开(公告)日：2017-02-02
申请号：US14810738
申请日：2015-07-28
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. NAMUDURI , Suresh GOPALAKRISHNAN
Abstract: A generator system includes an AC machine including a plurality of armature coils and a rectifier circuit electrically coupled to the armature coils. The rectifier circuit includes a plurality of switches. The generator system additionally includes a sensor device electrically coupled to a control circuit. The sensor device is configured to determine a rotor position of the AC machine. The control circuit determines a desired phase angle between a phase current and an induced voltage of the AC machine and provides a control signal to the rectifier circuit to switch the switches on and off to convert an AC signal to a DC signal and to control the rotor position of the AC machine to achieve the desired phase angle.
Abstract translation: 发电机系统包括AC电机，其包括多个电枢线圈和电耦合到电枢线圈的整流器电路。 整流电路包括多个开关。 发电机系统还包括电耦合到控制电路的传感器装置。 传感器装置被配置成确定AC电机的转子位置。 控制电路确定相电流和交流电机的感应电压之间的期望的相位角，并向整流电路提供控制信号以开关和接通开关，以将交流信号转换为直流信号并控制转子 交流电机的位置实现所需的相位角。
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公开(公告)号：US20140081509A1
公开(公告)日：2014-03-20
申请号：US14017126
申请日：2013-09-03
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David P. KOCH , Chandra S. NAMUDURI , Jeffrey James HOORN , Nikhil L. HOSKERI , Mark C. HOINKA
IPC: G07C5/08
CPC classification number: G07C5/0808 , B60R16/0232
Abstract: A method for operating a diagnostic system of a vehicle including a fail operational power system (FOPS) module and a fail operational system (FOS) module includes the FOS module requesting a microcontroller of the FOPS module to generate a diagnostic control signal. The FOS module receives the diagnostic information from a component module of the FOPS module based on the diagnostic control signal generated by the microcontroller. The FOS module executes isolator diagnostics based on the received diagnostic information.
Abstract translation: 一种用于操作包括故障操作电源系统（FOPS）模块和故障操作系统（FOS））模块的车辆的诊断系统的方法包括：请求FOPS模块的微控制器的FOS模块产生诊断控制信号。 FOS模块基于由微控制器产生的诊断控制信号从FOPS模块的组件模块接收诊断信息。 FOS模块根据接收到的诊断信息执行隔离器诊断。
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公开(公告)号：US20230378776A1
公开(公告)日：2023-11-23
申请号：US17749215
申请日：2022-05-20
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rashmi PRASAD , Chandra S. NAMUDURI
CPC classification number: H02J7/0031 , H01H71/12 , B60L53/11 , H02J7/0068
Abstract: A battery system includes a battery pack configured to be selectively connected to an output terminal of the battery system and a DCFC receptacle, a first contactor that is connected between the DCFC receptacle and a first terminal of the battery pack, and a first SSR connected in series with the first contactor between the DCFC receptacle and the first terminal of the battery pack. The first SSR has an open state where current from the DCFC receptacle to the battery pack is interrupted and a dosed state where current flows from the DCFC receptacle to the battery pack, the first SSR is configured to transition from the dosed state to the open state prior to the first contactor, and current only flows from the DCFC receptacle to the battery pack when both the first contactor and the first SSR are in the closed state.
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公开(公告)号：US20230361591A1
公开(公告)日：2023-11-09
申请号：US17739341
申请日：2022-05-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Srikanth ARISETTY , Venkata Prasad ATLURI , Charles W. WAMPLER, II , Chandra S. NAMUDURI , Raghunathan K
CPC classification number: H02J7/00712 , H02J7/0013 , H02J7/0048 , H01M10/425 , H01M4/386 , H01M4/505 , H01M4/583 , H01M4/525 , H01M10/441 , H01M2010/4271
Abstract: A battery pack includes: first battery modules, the first battery modules each including first battery cells having a first battery cell chemistry and not including second battery cells having a second battery cell chemistry that is different than the first battery cell chemistry; second battery modules, the second battery modules each including the second battery cells having the second battery cell chemistry and not including the first battery cells having the first battery chemistry; switches; and a switch control module configured to actuate the switches and control charging and discharging of the first and second battery modules.
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公开(公告)号：US20230299695A1
公开(公告)日：2023-09-21
申请号：US17699261
申请日：2022-03-21
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad Hussain ALVI , Chandra S. NAMUDURI , Suresh GOPALAKRISHNAN , Chunhao J. LEE , Lei HAO , Yue-Yun WANG , Rashmi PRASAD
CPC classification number: H02P5/74 , H02J7/0063 , H02J7/0013 , H02P23/14
Abstract: A power control system comprises a battery system including N battery packs. A plurality of contactors selectively connects N battery packs of a battery system in a first configuration supplying a first voltage level, a second configuration supplying a second voltage level, and a disconnected configuration. M power inverters connect the battery system to M electric machines, respectively. A controller is configured to determine when to transition between the first configuration and the second configuration. The controller is configured to transition between the first configuration and the second configuration by causing one of a positive torque transient and a negative torque transient to be generated by at least one of the M electric machines, transitioning the battery system from one of the first configuration and the second configuration to the disconnected configuration, and transitioning from the disconnected configuration to the other one of the first configuration and the second configuration.
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