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公开(公告)号：US20240234238A1
公开(公告)日：2024-07-11
申请号：US18150379
申请日：2023-01-05
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. Namuduri , Rashmi Prasad
IPC: H01L23/373 , H01L21/48 , H01L23/15 , H01L23/38 , H01L23/498
CPC classification number: H01L23/3735 , H01L21/4846 , H01L21/4882 , H01L23/15 , H01L23/38 , H01L23/49833 , H01L23/49844 , H01L24/32
Abstract: Aspects of the disclosure include a power module having enhanced thermal management. An exemplary power module can include a direct bond copper (DBC) substrate having a top copper layer, a bottom copper layer, and a dielectric layer between the top copper layer and the bottom copper layer. The power module includes a thin-film thermoelectric cooler (TFTEC) having a thermoelectric film positioned between a top insulator and a bottom insulator. One or more dies are positioned over the DBC substrate and the TFTEC and a controller is configured to adjust a thermoelectric device current of the TFTEC responsive to a temperature of the one or more dies.
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公开(公告)号：US20240204284A1
公开(公告)日：2024-06-20
申请号：US18085050
申请日：2022-12-20
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Shuonan Xu , Neeraj S. Shidore , Robert D. Schmidt , Steven Earl Muldoon , Chandra S. Namuduri , Robert D. Drexler , Antonio Duaine Ulisse
IPC: H01M10/615 , G01R31/389 , H01M10/48 , H01M10/63 , H01M10/657
CPC classification number: H01M10/615 , G01R31/389 , H01M10/486 , H01M10/63 , H01M10/657
Abstract: A device for thermal control of a battery system includes a heating control module configured to generate an alternating current (AC) heating current and heat the battery system to a desired temperature by applying the AC heating current to the battery system over a selected heating time duration. The heating control module is configured to monitor a rate of increase of a temperature of the battery system during the applying, during the heating time duration, perform a periodic impedance measurement, the periodic impedance measurement including application of a measurement signal having a selected frequency range to the battery system for a measurement period, a length of the measurement period select to minimize a difference between a desired rate of increase and the monitored rate of increase, and adjust the AC heating current during the applying based on the temperature and the impedance measurement.
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公开(公告)号：US20240181928A1
公开(公告)日：2024-06-06
申请号：US18072911
申请日：2022-12-01
Applicant: GM Global Technology Operations LLC
Inventor： Chandra S. Namuduri , Madhusudan Raghavan
CPC classification number: B60L58/20 , B60L53/16 , B60L53/62 , H02J7/0024
Abstract: An apparatus and method for charging an electrified vehicle through a charge port selectively configures a plurality of battery packs including battery packs having a voltage N with a plurality of controllable switches into one of several charging configurations which may include presenting the charge port with voltage N, 2N or 3N.
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公开(公告)号：US11999263B2
公开(公告)日：2024-06-04
申请号：US17982775
申请日：2022-11-08
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Orgun A. Guralp , Suresh Gopalakrishnan , Chandra S. Namuduri , Chunhao J. Lee , Muhammad Hussain Alvi
Abstract: A system for controlling propulsion in a vehicle includes a switching system connected to a battery system and a propulsion system. The battery system includes a first battery assembly and a second battery assembly, the propulsion system includes a first drive unit and a second drive unit, and the switching system includes a first switching device configured to selectively connect the first drive unit to the battery system and a second switching device configured to selectively connect the second drive unit to the battery system. The first switching device and the second switching device are independently operable. The system also includes a controller configured to operate the switching system to vary a voltage applied to at least one of the first drive unit and the second drive unit during vehicle propulsion.
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15.发明授权公开(公告)号：US11962173B2
公开(公告)日：2024-04-16
申请号：US17718362
申请日：2022-04-12
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Lei Hao , Yue-Yun Wang , Suresh Gopalakrishnan , Chandra S. Namuduri , Rashmi Prasad , Madhusudan Raghavan
CPC classification number: H02J7/0019 , B60L53/18 , B60L53/24 , B60W10/08 , B60L2240/423
Abstract: A system for use with a direct current fast-charging (DCFC) station includes a controller and battery system. The battery system includes first and second battery packs, and first, second, and third switches. The switches have ON/OFF conductive states commanded by the controller to connect the battery packs in a parallel-connected (P-connected) or series-connected (S-connected) configuration. An electric powertrain with one or more electric machines is powered via the battery system. First and second charge ports of the system are connectable to the station via a corresponding charging cable. The first charge port receives a low or high charging voltage from the station. The second charge port receives a low charging voltage. When the station can supply the high charging voltage to the first charge port, the controller establishes the S-connected configuration via the switches, and thereafter charges the battery system solely via the first charge port.
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Patent Agency Ranking
公开(公告)号：US20240113711A1
公开(公告)日：2024-04-04
申请号：US17957116
申请日：2022-09-30
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad Hussain Alvi , Khorshed Mohammed Alam , Yilun Luo , Chandra S. Namuduri , Suresh Gopalakrishnan , Junghoon Kim , Mohamed Kamel
IPC: H03K17/687 , H03K17/04 , H03K17/16
CPC classification number: H03K17/6877 , H03K17/0406 , H03K17/168
Abstract: A system includes an electronic device including a circuit having a semiconductor switch, and a switching control system operably connected to the semiconductor switch. The switching control system is configured to control a switching speed of the semiconductor switch based on a received voltage by altering at least one of a gate resistance and a gate capacitance of the semiconductor switch.
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公开(公告)号：US20240072703A1
公开(公告)日：2024-02-29
申请号：US17895366
申请日：2022-08-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. Namuduri , Suresh Gopalakrishnan , Norman K. Bucknor , Alireza Fatemi , Thomas W. Nehl
CPC classification number: H02P23/02 , B60L15/2045 , H02P23/14 , B60L2240/12 , B60L2240/423
Abstract: A method of controlling an electric motor of a vehicle includes monitoring torque command signals from a vehicle system to the electric motor, each torque command signal configured to cause the electric motor to output a commanded torque, and monitoring a speed of the vehicle and an output torque of the electric motor, the output torque responsive to a drive signal generated based on the torque command signals. The method also includes, based on the output torque and the vehicle speed indicating a low motor efficiency condition, modulating the drive signal between a first torque value and a second torque value that is less than the first torque value, the first torque value greater than the commanded torque and selected to increase an efficiency of the electric motor.
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公开(公告)号：US20240030726A1
公开(公告)日：2024-01-25
申请号：US17868379
申请日：2022-07-19
Applicant: GM Global Technology Operations LLC
Inventor： Mohamed Kamel , Chandra S. Namuduri , Muhammad Hussain Alvi , Jun-mo Kang , Dongxu Li
CPC classification number: H02J7/0019 , B60L58/13 , H01M10/441 , H01M10/425 , H02J7/0049 , H01M2010/4271 , H01M2220/20
Abstract: In one exemplary embodiment, a system in a vehicle includes two or more battery packs. Each of the two or more battery packs corresponds with a battery monitoring system (BMS) that monitors a charge and voltage of the battery pack. The system also includes three or more switches coupled to the two or more battery packs and a vehicle controller to control the three or more switches for operation in multiple modes. In one of the multiple modes, the three or more switches are controlled by the vehicle controller to charge only one of the two or more battery packs with a charger external to the vehicle to equalize the voltage among the two or more battery packs.
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公开(公告)号：US20240022178A1
公开(公告)日：2024-01-18
申请号：US17866995
申请日：2022-07-18
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad Hussain Alvi , Chandra S. Namuduri
CPC classification number: H02M7/003 , H02M7/48 , H02M1/0029 , H02M1/15
Abstract: A power conversion device includes an inverter configured to receive direct current (DC) power and convert the DC power to alternating current (AC) power, at least one capacitor having a first capacitance, and a busbar assembly electrically connected to the inverter and configured to electrically connect the inverter to a power source. The busbar assembly includes a positive busbar and a negative busbar, and a first capacitor layer disposed between the positive busbar and the negative busbar. The first capacitor layer is configured provide an amount of capacitance in addition to the first capacitance.
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公开(公告)号：US11865945B2
公开(公告)日：2024-01-09
申请号：US17839769
申请日：2022-06-14
Applicant: GM Global Technology Operations LLC
Inventor： Mohamed Kamel , Chandra S. Namuduri , Rashmi Prasad , Muhammad Hussain Alvi , Lyall Kenneth Winger
CPC classification number: B60L58/22 , B60L53/60 , B60L58/18 , H02J1/102 , H02J7/0019 , H02M1/007 , H02M1/0074 , H02M7/537 , B60L2210/10 , B60L2210/40 , H02J2310/48
Abstract: A rechargeable energy storage system may include a series arrangement of a plurality of batteries coupled to a first DC bus at a first DC voltage. A DC to DC converter may include a multi-input DC input stage coupled to a multi-output DC output stage. The multi-input DC input stage may include multiple distributed DC inputs, each distributed DC input being coupled to a respective one of the plurality of batteries. The multi-output DC output stage may include multiple aggregated DC outputs. At least one controllable switch may couple one or more of the multiple aggregated DC outputs to one or more other DC buses.
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