Gm Global Technolgoy Operations, Inc.

Charles Weldon Wampler, Ii

Mark William Verbrugge

Brian James Koch

Douglas Martin Linn

Alfred Zhang

Pei-chung Wang

Peter C Sun

Justin Bunnell

Justin R McDade

Yue-Yun Wang

James W Wells

Muhammad E Abdallah

Shuoqin Wang

Raffaello Ardanese

James R Salvador

Bob Ross Powell

Ryan Curtis Sekol

Debejyo Chakraborty

Dmitriy Bruder

Jing Gao

Sean R Wagner

Patricia M Laskowsky

Thomas A Yersak

Garrett M Seeman

Jeffrey S Piasecki

Ronald Michael Lesperance

Gerald C Rieck

Houchun Xia

Jeff E Nasca

Daniel R Baker

Luan Vu

Thanh-Son Dao

Jeffrey A Bednar

Meixian Wang

Kevin U Carriere

Xiumei Guo

Bryan T Campbell

Patrick Kroner

Richard Nietz

Nagarajan Sivashanmugam

A method of analyzing the quality of a battery cell includes performing a high-throughput quality check on the battery cell with a quality control system, assessing a quality score to the battery cell, with quality score identifying the battery cell as low-quality or high-quality, and performing a comprehensive quality check on the battery cell if identified as low-quality. The method further includes assessing an enhanced quality score to the battery cell superseding the quality score of the quality control system identifying the battery cell as confirmed low-quality or confirmed high-quality and providing revised production instructions for manufacturing successive battery cells if confirmed low-quality.

Method of analyzing the quality of a battery cell by performing a comprehensive quality check on battery cells assessed as low-quality from a high-throughput quality check

A wiper system for use with a windshield includes a track guide, a wiper assembly, a drive mechanism and a wipe mechanism. The wiper assembly has a wiper arm attached at a first end thereof to a rotor rotatably disposed on a wiper carrier, wherein the wiper carrier is engaged with the track guide and is configured for translation therealong. The drive mechanism is connected with the wiper carrier and is configured for positioning the wiper carrier along the track guide. The wipe mechanism is connected with at least one of the rotor and the wiper carrier and is configured to cause the rotor to rotate, thereby causing the wiper arm to produce a wiping motion.

Track-guided wiper system and method

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

An apparatus and method for tracking a battery cell is disclosed, for a device having one or more sensors and a controller with a processor and tangible, non-transitory memory. The method includes obtaining respective sensor data relative to an anode and a cathode. A predicted anode capacity and predicted cathode capacity are determined based on the respective sensor data. The predicted anode capacity and predicted cathode capacity each have a respective variance value. An updated set of variables and updated respective variance values are generated based in part on the predicted anode capacity, the predicted cathode capacity and a measured equilibrium voltage, via a Kalman filter module executed by the controller. The updated set of variables include an updated anode capacity and an updated cathode capacity. Operation of the device is controlled based in part on the updated set of variables and updated respective variance values.

Apparatus and method for tracking electrode capacity

A method for estimating a state of a battery pack using a controller having battery state estimator (BSE) logic includes receiving or delivering a constant baseline current via the battery pack. Current oscillations having time-variant frequency content are selectively injected into the baseline current via the controller in response to a predetermined condition. The baseline current and the current oscillations combine to form a final current. The method includes estimating a battery parameter via the BSE logic concurrently with the current oscillations to generate an estimated battery parameter, and estimating the present state of the battery pack via the controller using the estimated battery parameter. An electrical system includes a rotary electric machine that is electrically connected to and driven by the battery pack, and a controller configured to execute the method.

Battery state estimation using injected current oscillation

A method for battery capacity estimation is provided. The method includes, within a computerized processor, monitoring a sensor operable to gather data regarding a battery, determining a voltage-based state of charge for the battery based upon the data from the sensor, determining a capacity degradation value for the battery based upon the data from the sensor, determining an integrated current value through Coulomb counting based upon the data from the sensor, determining a predicted battery state of charge for the battery based upon the capacity degradation value and the integrated current value, processing the voltage-based state of charge and the predicted battery state of charge using a Kalman filter to generate an updated overall battery capacity estimate, and using the updated overall battery capacity estimate to control management of the battery.

Method and system for battery capacity estimation

A method and system for monitoring a charge capacity of a battery includes determining a predicted charge capacity and a first uncertainty parameter based upon the current, voltage, and temperature of the battery, wherein the predicted charge capacity is determined by executing a charge capacity degradation model. A measured charge capacity and an associated second uncertainty parameter of the battery are also determined, by executing a charge capacity update routine. A charge capacity estimate for the battery is determined based upon the predicted charge capacity and the measured charge capacity, and an updated uncertainty parameter for the charge capacity estimate is determined based upon the first and the second uncertainty parameters. An estimated covariance parameter, and a covariance ratio are determined based upon the updated uncertainty parameter and the estimated covariance parameter. A remedial battery management operation is commanded based upon the uncertainty parameter for the charge capacity estimate.

Method and apparatus for monitoring a battery state estimator

A number of variations may include products and methods for estimating the state of an energy system. At least one sensor may monitor a voltage and a current of the energy storage system. An electronic controller may be communicatively coupled with the energy storage system and may receive input from the sensor. A circuit may be representative of the energy storage system and may be appropriately defined in the electronic controller. The circuit may estimate a state of the energy storage system from a reading of the voltage and the current.

State estimation of an energy system

Disclosed are battery management systems with control logic for battery state estimation (BSE), methods for making/using/assembling a battery cell with a reference electrode, and electric drive vehicles equipped with a traction battery pack and BSE capabilities. In an example, a battery cell assembly includes a battery housing with an electrolyte composition stored within the battery housing. The electrolyte composition transports ions between working electrodes. A first working (anode) electrode is attached to the battery housing in electrochemical contact with the electrolyte composition. Likewise, a second working (cathode) electrode is attached to the battery housing in electrochemical contact with the electrolyte composition. A reference electrode is interposed between the first and second working electrodes, placed in electrochemical contact with the electrolyte composition. The reference electrode and one or both working electrodes cooperate to output a half-cell voltage signal that is indicative of a battery state of the battery cell assembly.

Battery state estimation control logic and architectures for electric storage systems

Systems and methods are disclosed for estimating a state of a battery system such as a current-limited state of power and/or a voltage-limited state of power using a battery system model incorporating a nonlinear resistance element. Parameters of elements included in a battery cell model associated with a nonlinear resistance of a battery cell may be directly parameterized and used in connection with state estimation methods. By accounting for the nonlinear effect, embodiments of the disclosed systems and methods may increase available battery power utilized in connection with battery system control and/or management decisions over a larger window of operating conditions.

Battery state estimation systems and methods using a nonlinear resistance element

A number of illustrative variations may include a method, which may include obtaining terminal voltage data of a electrochemical device; determining an equivalent circuit model which operates in a manner approximating the terminal voltage data comprising an open circuit voltage Vcomprising a constant voltage source Vand a voltage Vacross a capacitor C, in series with an overpotential circuit comprising an overpotential voltage V; determining at least one of the power capabilities of the equivalent circuit model; and, estimating at least one of the power capabilities of the electrochemical device based upon the determined power capabilities of the equivalent circuit model.

Electrochemical device power estimator and methods of making and using the same

A positioner for use in a tooling apparatus, the positioner including a tool, at least one servo-motor for actuating said tool, a controller for controlling the servo-motor, nonvolatile memory in the controller, and a calibration stored in the nonvolatile memory, the calibration including compensation parameters for the build variance of the positioner.

Programmable adaptable assembly system

A pogo welding apparatus especially for spot welding metal sheets at selected locations spaced away from their edges wherein the sheets are held in a temporary assembly with the selected locations engaged and separate programmable positioners move a primary (pogo) electrode and a backup electrode sequentially against opposite sides of the selected locations to spot weld the sheets at the selected locations in sequence. Various alternative programmable positioners, including robots of varying types, may be used to carry the electrodes. A multi head back-up electrode is adapted for efficient use of the apparatus and method in difficult to reach workpiece locations.

Programmable pogo welding apparatus and method

A pogo welding apparatus especially for spot welding metal sheets at selected locations spaced away from their edges wherein the sheets are held in a temporary assembly with the selected locations engaged and separate programmable positioners move a primary (pogo) electrode and a backup electrode sequentially against opposite sides of the selected locations to spot weld the sheets at the selected locations in sequence. Various alternative programmable positioners, including robots of varying types, may be used to carry the electrodes.

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Birmingham, MI, United States of America

Charles Weldon Wampler, Ii