Gm Global Technolgoy Operations, Inc.

Jeffrey S Piasecki

Wende Zhang

Jinsong Wang

Kent S Lybecker

Ryan M Frakes

Garrett M Seeman

Travis S Hester

Yue-Yun Wang

Bakhtiar Brian Litkouhi

Brian James Koch

Charles A Green

Lei Hao

Brian A Welchko

Charles W Wampler, Ii

Azeem Sarwar

Anno Yoo

Jing Gao

Charles Weldon Wampler, Ii

Alfred Zhang

Justin Bunnell

Xiangxing Lu

Ciro A Spigno

Debbie E Nachtegall

Ryan B Moulliet

Justin R McDade

Andrew J Cornelli

Jeffrey A Bednar

Margaux LeBlanc

Gus Hatoum

James Clem

Xiumei Guo

A propulsion system for a device includes an electric motor configured to generate torque to propel the device. The electric motor includes a stator and a rotor with one or more permanent magnets. A controller is in communication with the electric motor and has recorded instructions for a method for minimizing demagnetization in the one or more permanent magnets. The controller is adapted to select a starting point and an intermediate point on a current trajectory in a stator current graph. The controller is adapted to obtain a final point on the stator current trajectory based on a comparison of the intermediate point and a predetermined voltage limit. A demagnetized torque capability is generated based on the final point on the current trajectory.

System and method for minimizing demagnetization in rotor magnets

A method for battery capacity estimation is provided. The method includes monitoring a sensor, collecting a plurality of data points including a voltage-based state of charge value and an integrated current value, defining within the data points a first data set collected during a first time period and a second data set collected during a second time period, determining an integrated current error related to the second data set, comparing the integrated current error related to the second data set to a threshold integrated current error. When the error related to the second data set exceeds the threshold, the method further includes resetting the second data set based upon an integrated current value from the first time period. The method further includes combining the data sets to create a combined data set and determining a voltage slope capacity estimate as a change in integrated current versus voltage-based state of charge.

Method and system for battery capacity estimation using voltage slope capacity and dynamic anchors

Powerflow of a rechargeable energy storage system (RESS) is managed according to a method. The RESS has series-connected first and second battery elements with different characteristics. Each element, e.g., a pack, has a corresponding maximum or minimum voltage or current limit. Currents are predicted for each of the first and second battery elements via a controller using a corresponding voltage limit. A requested operating mode of the RESS is used to select a current for the elements. A voltage across the elements is predicted using the selected current and a corresponding battery state space model. The method predicts a total power capability of the RESS over a prediction horizon using the selected current to generate predicted power capability values. The requested operating mode is controlled over the horizon using the power capability values. A powertrain system includes the RESS, an inverter, an electric machine, and the controller.

Power prediction for reconfigurable series-connected battery with mixed battery chemistry

A distributed battery power system having a battery pack and a battery controller. The battery pack has: a plurality of cells configured to generate a plurality of cell voltages; a voltage current temperature module electrically connected to the plurality of cells; and a plurality of isolation switch sets electrically connected between the plurality of cells. The battery controller is in communication with the voltage current temperature module, and operable to: send a status request to the voltage current temperature module; receive the plurality of cell voltages from the voltage current temperature module in response to the status request; determine if the plurality of cells includes one or more problem cells in response to the plurality of cell voltages; and perform an action in response to determining that the one or more problem cells are present to prevent damage to the one or more problem cells.

Distributed battery power estimation with weaker cell monitoring

Management system for a rechargeable energy storage device in an electric vehicle and corresponding method is disclosed. The rechargeable energy storage device has one or more battery packs each having a plurality of modules with one or more respective cells. A respective module management unit is embedded in each of the plurality of modules through respective microcircuits and configured to determine one or more local parameters. A supervisory controller is configured for two-way communication with the respective module management unit. The supervisory controller is configured to receive the local parameters, determine one or more global pack parameters based in part on the local parameters and transmit the global pack parameters back to the respective management unit. The supervisory controller is configured to control operation of the rechargeable energy storage device based in part on the global pack parameters and the local parameters.

Management system with supervisory control for rechargeable energy storage device in electric vehicle

Powerflow is managed using a method, e.g., in a powertrain system having a multi-pack rechargeable energy storage system (RESS) with parallel battery packs. Each pack has a corresponding maximum electrical (current or voltage) limit. The method includes predicting a corresponding terminal voltage for each pack using the corresponding maximum electrical limit. The method includes selecting a terminal voltage as a selected voltage based on a requested operating mode, including selecting a maximum of the terminal voltages when the requested operating mode is a discharging mode and a minimum of the same when the requested operating mode is a charging mode. A pack current through each pack is predicted using the selected voltage and a corresponding battery state space model. A total power capability of the RESS is predicted over a predetermined prediction horizon using the selected voltage, with the operating mode controlled over the prediction horizon via the controller.

Power management of high-current fast-charging battery

System and method of controlling operation of a device having a rechargeable energy storage pack with a plurality of cells, based on propulsion loss assessment. A controller is configured to obtain a state of charge data and an open circuit voltage of the rechargeable energy storage pack. The controller is configured to obtain a state of charge disparity factor (dSOC) from a selected dataset. The state of charge disparity factor (dSOC) is defined as a difference between a minimum value of the state of charge and an average value of the state of charge of the plurality of cells. The controller is configured to control operation of the device based in part on the state of charge disparity factor (dSOC) and a plurality of parameters (P), including raising one or more of a plurality of flags each transmitting respective information to a user.

Controlling operation of device with rechargeable energy storage pack based on propulsion loss assessment

A system and method for determining when to display frontal curb view images to a driver of a vehicle, and what types of images to display. A variety of factors&#x2014;such as vehicle speed, GPS/location data, the existence of a curb in forward-view images, and vehicle driving history&#x2014;are evaluated as potential triggers for the curb view display, which is intended for situations where the driver is pulling the vehicle into a parking spot which is bounded in front by a curb or other structure. When forward curb-view display is triggered, a second evaluation is performed to determine what image or images to display which will provide the best view of the vehicle's position relative to the curb. The selected images are digitally synthesized or enhanced, and displayed on a console-mounted or in-dash display device.

Enhanced front curb viewing system

A system and method for creating an enhanced virtual top-down view of an area in front of a vehicle, using images from left-front and right-front cameras. The enhanced virtual top-down view not only provides the driver with a top-down view perspective which is not directly available from raw camera images, but also removes the distortion and exaggerated perspective effects which are inherent in wide-angle lens images. The enhanced virtual top-down view also includes corrections for three types of problems which are typically present in de-warped images&#x2014;including artificial protrusion of vehicle body parts into the image, low resolution and noise around the edges of the image, and a 'double vision' effect for objects above ground level.

Enhanced top-down view generation in a front curb viewing system

A system and method for creating an enhanced perspective view of an area in front of a vehicle, using images from left-front and right-front cameras. The enhanced perspective view removes the distortion and exaggerated perspective effects which are inherent in wide-angle lens images. The enhanced perspective view uses a camera model including a virtual image surface and other processing techniques which provide corrections for two types of problems which are typically present in de-warped perspective images&#x2014;including a stretching effect at the peripheral area of a wide-angle image de-warped by rectilinear projection, and double image of objects in an area where left-front and right-front camera images overlap.

Enhanced perspective view generation in a front curb viewing system

A vehicle imaging system includes an image capture device capturing an image exterior of a vehicle. The captured image includes at least a portion of a sky scene. A processor generates a virtual image of a virtual sky scene from the portion of the sky scene captured by the image capture device. The processor determines a brightness of the virtual sky scene from the virtual image. The processor dynamically adjusts a brightness of the captured image based the determined brightness of the virtual image. A rear view mirror display device displays the adjusted captured image.

Dynamic rearview mirror adaptive dimming overlay through scene brightness estimation

An apparatus for capturing an image includes a plurality of lens elements coaxially encompassed within a lens housing. A split-sub-pixel imaging chip includes an IR-pass filter coating applied on selected sub-pixels. The sub-pixels include a long exposure sub-pixel and a short-exposure sub-pixel for each of a plurality of green blue and red pixels.

Split sub-pixel imaging chip with IR-pass filter coating applied on selected sub-pixels

Method for applying super-resolution to images captured by a camera device of a vehicle includes receiving a plurality of image frames captured by the camera device. For each image frame, a region of interest is identified within the image frame requiring resolution related to detail per pixel to be increased. Spatially-implemented super-resolution is applied to the region of interest within each image to enhance image sharpness within the region of interest.

Image super-resolution for dynamic rearview mirror

An apparatus for capturing an image includes a plurality of lens elements coaxially encompassed within a lens housing. One of the lens elements includes an aspheric lens element having a surface profile configured to enhance a desired region of a captured image. At least one glare-reducing element coaxial with the plurality of lens elements receives light subsequent to the light sequentially passing through each of the lens elements. An imaging chip receives the light subsequent to the light passing through the at least one glare-reducing element. The imaging chip includes a plurality of green, blue and red pixels.

Camera hardware design for dynamic rearview mirror

A method for generating a glare-reduced image from images captured by a camera device of a subject vehicle includes obtaining a short-exposure image and a long-exposure image and generating a resulting high dynamic range image based on the short-exposure and long-exposure images. Pixel values are monitored within both the short- and long-exposure images. A light source region is identified within both the short- and long-exposure images based on the monitored pixel values. A glaring region is identified based on the identified light source region and one of calculated pixel ratios and calculated pixel differences between the monitored pixel values of the long- and short-exposure images. The identified glaring region upon the resulting high dynamic range image is modified with the identified light source region within the short-exposure image. The glare-reduced image is generated based on the modified identified glaring region upon the resulting HDR image.

Growing community of inventors

Rochester, MI, United States of America

Jeffrey S Piasecki