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公开(公告)号：US11762028B2
公开(公告)日：2023-09-19
申请号：US17669486
申请日：2022-02-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chaitanya Sankavaram , Garrett Michael Seeman , Zining Zhang , Calvin Wang
IPC: G01R31/389 , G01R31/396 , B60L58/12 , G01R31/374 , G01R31/3842
CPC classification number: G01R31/389 , B60L58/12 , G01R31/374 , G01R31/3842 , G01R31/396
Abstract: A current measuring circuit measures a charging current of a battery comprising a plurality of cell groups while the battery is being charged using one of a plurality of charging systems. A voltage measuring circuit measures voltages of the cell groups. A controller defines a plurality operating regions in a charging current profile of the battery during a charging cycle, filters the charging current and the voltages measured in the operating regions, calculates internal resistances of the cell groups in the operating regions based on the filtered current and voltages, generates at least one of statistical values and distance metrics based on the internal resistances of the cell groups, and determines whether one or more of the cell groups is faulty based on the at least one of the statistical values and the distance metrics irrespective of the plurality of charging systems used to charge the battery.
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Patent Agency Ranking
公开(公告)号：US10857854B2
公开(公告)日：2020-12-08
申请号：US16380518
申请日：2019-04-10
Applicant: GM Global Technology Operations LLC
Inventor： Shiming Duan , Christopher H. Knieper , Calvin Wang
Abstract: A method of identifying air flow faults within a cooling system of an automobile comprises measuring the temperature of coolant entering a heat exchanger for the cooling system, measuring the temperature of coolant leaving the heat exchanger, and measuring the temperature of ambient air that is flowing into the heat exchanger, calculating Actual Delta T by subtracting the temperature of coolant leaving the heat exchanger from the temperature of coolant entering the heat exchanger, calculating Expected Delta T, wherein Expected Delta T is a pre-determined value of an expected difference between the temperature of the coolant entering the heat exchanger and the temperature of the coolant leaving the heat exchanger, calculating Effective Delta T by subtracting Expected Delta T from Actual Delta T, and identifying a fault in the air flow through the heat exchanger based on the value of Effective Delta T.
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公开(公告)号：US12210067B2
公开(公告)日：2025-01-28
申请号：US17516223
申请日：2021-11-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chaitanya Sankavaram , Calvin Wang , Ciro A. Spigno , Garrett Michael Seeman
IPC: G01R31/392 , B60L58/10 , G01R31/3842 , G01R31/389
Abstract: A system for monitoring a battery of a vehicle includes a current measuring circuit to measure a current of the battery comprising a plurality of cell groups connected to each other. A voltage measuring circuit is to measure voltages of the cell groups. A controller is configured to define a plurality operating regions in a current profile of the battery during a drive cycle of the vehicle. The controller is configured to filter the current and the voltages measured in the operating regions and calculate internal resistances of the cell groups in the operating regions based on the filtered current and voltages. The controller is configured to generate statistical values based on the internal resistances of the cell groups and determine whether one or more of the cell groups is faulty based on differences between maximum and minimum values of one of the statistical values across the cell groups.
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公开(公告)号：US10996134B2
公开(公告)日：2021-05-04
申请号：US16427889
申请日：2019-05-31
Applicant: GM Global Technology Operations LLC
Inventor： Shiming Duan , Paul E. Krajewski , Christopher H. Knieper , Calvin Wang
Abstract: A method of diagnosing a leak in a coolant system of an automobile includes repeatedly measuring the coolant level within the coolant system at a pre-determined time interval, calculating a short term leak rate, wherein the short term leak rate is the rate of coolant leakage over a first pre-determined length of time, calculating a long term leak rate, wherein the long term leak rate is the rate of coolant leakage over a second pre-determined length of time, further wherein the second pre-determined length of time is longer than the first pre-determined length of time, identifying a coolant system leakage state based on a current coolant level within the coolant system, the short term leak rate, and the long term leak rate, and providing notification of the coolant system leakage state to an operator of the vehicle.
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公开(公告)号：US20200378863A1
公开(公告)日：2020-12-03
申请号：US16427889
申请日：2019-05-31
Applicant: GM Global Technology Operations LLC
Inventor： Shiming Duan , Paul E. Krajewski , Christopher H. Knieper , Calvin Wang
Abstract: A method of diagnosing a leak in a coolant system of an automobile includes repeatedly measuring the coolant level within the coolant system at a pre-determined time interval, calculating a short term leak rate, wherein the short term leak rate is the rate of coolant leakage over a first pre-determined length of time, calculating a long term leak rate, wherein the long term leak rate is the rate of coolant leakage over a second pre-determined length of time, further wherein the second pre-determined length of time is longer than the first pre-determined length of time, identifying a coolant system leakage state based on a current coolant level within the coolant system, the short term leak rate, and the long term leak rate, and providing notification of the coolant system leakage state to an operator of the vehicle.
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公开(公告)号：US20200324619A1
公开(公告)日：2020-10-15
申请号：US16380518
申请日：2019-04-10
Applicant: GM Global Technology Operations LLC
Inventor： Shiming Duan , Christopher H. Knieper , Calvin Wang
IPC: B60H1/00
Abstract: A method of identifying air flow faults within a cooling system of an automobile comprises measuring the temperature of coolant entering a heat exchanger for the cooling system, measuring the temperature of coolant leaving the heat exchanger, and measuring the temperature of ambient air that is flowing into the heat exchanger, calculating Actual Delta T by subtracting the temperature of coolant leaving the heat exchanger from the temperature of coolant entering the heat exchanger, calculating Expected Delta T, wherein Expected Delta T is a pre-determined value of an expected difference between the temperature of the coolant entering the heat exchanger and the temperature of the coolant leaving the heat exchanger, calculating Effective Delta T by subtracting Expected Delta T from Actual Delta T, and identifying a fault in the air flow through the heat exchanger based on the value of Effective Delta T.
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