Gm Global Technolgoy Operations, Inc.

Michael J Gielniak

Damon R Frisch

Brian James Koch

Jian Lin

Wei Liu

Xidong Tang

Joseph M Lograsso

Xiaodong Zhang

Methods and systems are provided for characterizing a battery. A property of the battery is measured. A dynamic characteristic of the battery is determined from a second order linear dynamic model.

Method and system for characterizing a battery

Methods and systems for determining a state of charge of a battery exhibiting a transient response are provided. At least one property of the battery is measured. The state of charge of the battery is determined based on the at least one measured property and a transient response of the battery.

Method and system for determining a state of charge of a battery based on a transient response

A computer implemented method of facilely releasing a BSE software module adapted for execution by an electronic control unit having an update model of the BSE software and a controller having an embedded desktop model of the BSE software, includes a plurality of autonomously performed steps resulting in the compiling of a plurality of c-files into a library file. A single keyword activated preferred embodiment is disclosed in a MatLab&#xae;/Simulink&#xae;/Real-Time Workshop&#xae; environment.

Computer-implemented method of releasing battery state estimation software

Methods and systems for determining a state of charge of a battery are provided. A first component of the state of charge is calculated based on a first property of the battery. A second component of the state of charge is calculated based on a second property of the battery. The first component of the state of charge is weighted based on a rate of change of the first property relative to a change of the state of charge. The second component of the state of charge is weighted based on a rate of change of the second property relative to a change of the state of charge. The state of charge is determined based on the first and second weighted components.

Method and system for determining a state of charge of a battery

A method for rapidly determining an initial diffusion voltage (V)as a starting point in calculating a diffusion voltage in an electro-chemical cell (e.g., a battery used in an automotive vehicle) includes obtaining a time difference tbetween a time when the cell was last turned-OFF and a time when the cell was next turned-ON, selecting a starting diffusion voltage (V)based on t, determining a trial diffusion voltage Vbased on a diffusion circuit model and (V), calculating an error voltage V=(V)&#x2212;|V&#x2212;V| where Vand Vare cell voltages at turn-OFF and turn-ON respectively, repeating the foregoing determining and calculating steps using for each iteration (V)=(V)+Vuntil Vis less than or equal to a first predetermined tolerance amount &#x3b5;, storing in a memory a value of Vcorresponding to the condition V&#x2266;&#x3b5;, and setting (V)equal to the just stored value of V. A further diffusion voltage Vis then determined using the same diffusion circuit model and the just obtained (V)and is advantageously used by a controller in an electric propulsion vehicle to determine a state of charge of the propulsion battery.

Fast search algorithm for finding initial diffusion voltage in electro-chemical systems

A method for determining the state of charge (SOC) of a lithium ion battery is provided. The method leverages a circuit model of the lithium ion battery, and generates four battery parameters from which the SOC is derived.

Dynamically adaptive method for determining the state of charge of a battery

A system for and method of estimating the state-of-age of a secondary cell utilizing an adaptive group filter algorithm, includes battery current, voltage, and temperature sensors, a communication device, and a controller communicatively coupled to the sensors and device, configured to filter data by analyzing only sample data points from instantaneous charge or discharge events, selecting only a sample of n instantaneous points for further regression, including n/2 charge event points and n/2 discharge event points, and separately averaging the charge and discharge event points, and further configured to determine the state-of-age by determining a resistance slope based on the rate of current and voltage change between the averages of the points, and matching the slope to a calibrated scalar or relational database.

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Atlanta, GA, United States of America

Michael J Gielniak