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Jon Petter Christophersen

from Moscow, ID
Age ~46
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Also known as:
Jon P Christophersen, Jon P Christopher, Jon P Christophers, Jon Christopersen
Phone and address:
1139 Leepike Ct, Moscow, ID 83843
Related to:
Kari A Christophers, 49Benjamin Doty, 32Ivor J Vaz, 61Jonathan Crapuchettes, 39Antoinette Vaz
Connected to:
Alex ChristofalosAllan L Christman, 31Allyn D Christopher, 48Amanda ChristosAndrea Christmas, 45Anita S Christon, 69Ann R Christoffel, 63Arthur F Christofersen, 98Bonnie J Christopherson, 58Brandon L Christman, 35

Jon Christophersen Phones & Addresses

  • 1139 Leepike Ct, Moscow, ID 83843
  • 2368 Arborcrest Rd, Moscow, ID 83843 (208) 882-4842
  • 3790 Briar Creek Cir, Idaho Falls, ID 83406 (208) 529-2407
  • 553 Ruth Ave, Idaho Falls, ID 83401 (208) 529-2407
  • Ammon, ID

Work

Company: Dynexus technology, inc. Dec 2016 Position: Chief scientist

Education

Degree: Doctorates, Doctor of Philosophy School / High School: Montana State University - Bozeman 2008 to 2011 Specialities: Electrical Engineering

Skills

Batteries • Testing • Simulations • Design of Experiments • R&D • Analysis • Characterization • Energy Storage • Systems Engineering • Program Management • Matlab • Labview • Materials Science • Engineering Management • Sensors

Industries

Electrical/Electronic Manufacturing

Resumes

Resumes

Jon Christophersen Photo 1

Chief Scientist

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Location:
1512 Lanny Ln, Moscow, ID 83843
Industry:
Electrical/Electronic Manufacturing
Work:
Dynexus Technology, Inc.
Chief Scientist
Sel Jun 2015 - Nov 2016
Lead Research Engineer
Idaho National Laboratory Feb 2000 - Jun 2015
Research Engineer and Senior Scientist
Education:
Montana State University - Bozeman 2008 - 2011
Doctorates, Doctor of Philosophy, Electrical Engineering University of Idaho 2001 - 2005
Master of Science, Masters, Electrical Engineering
Skills:
Batteries
Testing
Simulations
Design of Experiments
R&D
Analysis
Characterization
Energy Storage
Systems Engineering
Program Management
Matlab
Labview
Materials Science
Engineering Management
Sensors

Publications

Us Patents

Method Of Detecting System Function By Measuring Frequency Response

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US Patent:
8150643, Apr 3, 2012
Filed:
Jun 30, 2008
Appl. No.:
12/217013
Inventors:
John L. Morrison - Butte MT, US
William H. Morrison - Manchester CT, US
Jon P. Christophersen - Idaho Falls ID, US
Assignee:
Battelle Energy Alliance, LLC - Idaho Falls ID
Montana Tech of the University of Montana - Butte MT
Qualtech Systems, Inc. - East Hartford CT
International Classification:
G01R 23/00
G06F 11/00
US Classification:
702 75, 702 79, 702117, 324603
Abstract:
Real-time battery impedance spectrum is acquired using a one-time record. Fast Summation Transformation (FST) is a parallel method of acquiring a real-time battery impedance spectrum using a one-time record that enables battery diagnostics. An excitation current to a battery is a sum of equal amplitude sine waves of frequencies that are octave harmonics spread over a range of interest. A sample frequency is also octave and harmonically related to all frequencies in the sum. The time profile of this signal has a duration that is a few periods of the lowest frequency. The voltage response of the battery, average deleted, is the impedance of the battery in the time domain. Since the excitation frequencies are known and octave and harmonically related, a simple algorithm, FST, processes the time record by rectifying relative to the sine and cosine of each frequency. Another algorithm yields real and imaginary components for each frequency.

Method Of Detecting System Function By Measuring Frequency Response

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US Patent:
8352204, Jan 8, 2013
Filed:
May 3, 2010
Appl. No.:
12/772880
Inventors:
John L. Morrison - Butte MT, US
William H. Morrison - Butte MT, US
Jon P. Christophersen - Idaho Falls ID, US
Chester G. Motloch - Idaho Falls ID, US
Assignee:
Battelle Energy Alliance, LLC - Idaho Falls ID
International Classification:
G01R 23/00
G01R 27/28
G01R 31/00
US Classification:
702 75, 702 79, 702117
Abstract:
Methods of rapidly measuring an impedance spectrum of an energy storage device in-situ over a limited number of logarithmically distributed frequencies are described. An energy storage device is excited with a known input signal, and a response is measured to ascertain the impedance spectrum. An excitation signal is a limited time duration sum-of-sines consisting of a select number of frequencies. In one embodiment, magnitude and phase of each frequency of interest within the sum-of-sines is identified when the selected frequencies and sample rate are logarithmic integer steps greater than two. This technique requires a measurement with a duration of one period of the lowest frequency. In another embodiment, where selected frequencies are distributed in octave steps, the impedance spectrum can be determined using a captured time record that is reduced to a half-period of the lowest frequency.

Method And Apparatus For In-Situ Characterization Of Energy Storage And Energy Conversion Devices

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US Patent:
20070257681, Nov 8, 2007
Filed:
May 4, 2006
Appl. No.:
11/381689
Inventors:
Jon Christophersen - Idaho Falls ID, US
Chester Motloch - Idaho Falls ID, US
John Morrison - Butte MT, US
Weston Albrecht - Layton UT, US
International Classification:
G01N 27/416
US Classification:
324426000
Abstract:
Disclosed are methods and apparatuses for determining an impedance of an energy-output device using a random noise stimulus applied to the energy-output device. A random noise signal is generated and converted to a random noise stimulus as a current source correlated to the random noise signal. A bias-reduced response of the energy-output device to the random noise stimulus is generated by comparing a voltage at the energy-output device terminal to an average voltage signal. The random noise stimulus and bias-reduced response may be periodically sampled to generate a time-varying current stimulus and a time-varying voltage response, which may be correlated to generate an autocorrelated stimulus, an autocorrelated response, and a cross correlated response. Finally, the autocorrelated stimulus, the autocorrelated response, and the cross correlated response may be combined to determine at least one of impedance amplitude, impedance phase, and complex impedance.

Method Of Estimating Pulse Response Using An Impedance Spectrum

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US Patent:
20100332165, Dec 30, 2010
Filed:
Jun 11, 2010
Appl. No.:
12/813750
Inventors:
John L. Morrison - Butte MT, US
William H. Morrison - Manchester CT, US
Jon P. Christophersen - Idaho Falls ID, US
Chester G. Motloch - Idaho Falls ID, US
International Classification:
G01R 23/16
G01R 31/36
G06F 19/00
US Classification:
702 63, 702 77
Abstract:
Electrochemical Impedance Spectrum (EIS) data are used directly to predict the pulse performance of an energy storage device. The impedance spectrum of the EIS is obtained in-situ using pre-existing techniques. A simulation waveform is configured such that the period of the pulse is greater than or equal to the lowest frequency of the impedance measurement. If the pulse is assumed to be periodic for analysis purposes, the complex Fourier series coefficients can be obtained. The number of harmonic constituents are selected so as to appropriately resolve the response, but the maximum frequency should be less than or equal to the highest frequency of the impedance measurement. In some cases, the measured frequencies of the impedance spectrum do not match the corresponding harmonic components of the simulated pulse wave. This is resolved by estimating the impedance measurements at the desired frequencies using linear interpolation, cubic spline fits, or other comparable methods. Using a current pulse as an example, the Fourier coefficients of the pulse are multiplied by the impedance spectrum at the corresponding frequency to obtain the Fourier coefficients of the voltage response to the desired pulse. The Fourier coefficients of the response are then summed reassemble to obtain the overall time domain estimate of the voltage using the Fourier series analysis. Thus, the response of an energy storage device to an anticipated or desired pulse can be estimated using low-level, charge neutral impedance measurements combined with Fourier series analysis.

In-Situ Real-Time Energy Storage Device Impedance Identification

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US Patent:
20110270559, Nov 3, 2011
Filed:
May 3, 2011
Appl. No.:
13/100170
Inventors:
Jon P. Christophersen - Idaho Falls ID, US
John L. Morrison - Butte MT, US
William H. Morrison - Manchester CT, US
Chester G. Motloch - Idaho Falls ID, US
Assignee:
BATTELLE ENERGY ALLIANCE, LLC - Idaho Falls ID
International Classification:
G06F 19/00
G01R 27/28
G01R 35/00
US Classification:
702 65, 324601, 324649
Abstract:
An impedance analysis system for characterizing an energy storage device (ESD) includes a signal vector assembler to generate a signal vector from a composition of one or more waveforms and a signal generator for generating a stimulus signal responsive to the signal vector. A signal measurement device measures a response signal indicative of a response of the ESD substantially simultaneously with when the stimulus signal is applied to the energy storage device. A load variation monitor monitors load variations on the energy storage device due to operational circuitry coupled thereto. An analyzer is operably coupled to the response signal and analyzes the response signal relative to the signal vector to determine an impedance of the energy storage device.

Crosstalk Compensation In Analysis Of Energy Storage Devices

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US Patent:
20120032688, Feb 9, 2012
Filed:
May 3, 2011
Appl. No.:
13/100184
Inventors:
Jon P. Christophersen - Idaho Falls ID, US
John L. Morrison - Butte MT, US
William H. Morrison - Manchester CT, US
Chester G. Motloch - Idaho Falls ID, US
David M. Rose - Mountlake Terrace WA, US
Assignee:
BATTELLE ENERGY ALLIANCE, LLC - Idaho Falls ID
International Classification:
G01R 27/28
US Classification:
324612
Abstract:
Estimating impedance of energy storage devices includes generating input signals at various frequencies with a frequency step factor therebetween. An excitation time record (ETR) is generated to include a summation of the input signals and a deviation matrix of coefficients is generated relative to the excitation time record to determine crosstalk between the input signals. An energy storage device is stimulated with the ETR and simultaneously a response time record (RTR) is captured that is indicative of a response of the energy storage device to the ETR. The deviation matrix is applied to the RTR to determine an in-phase component and a quadrature component of an impedance of the energy storage device at each of the different frequencies with the crosstalk between the input signals substantially removed. This approach enables rapid impedance spectra measurements that can be completed within one period of the lowest frequency or less.

Method, System And Computer-Readable Media For Measuring Impedance Of An Energy Storage Device

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US Patent:
20120262186, Oct 18, 2012
Filed:
Apr 3, 2012
Appl. No.:
13/438741
Inventors:
John L. Morrison - Butte MT, US
William H. Morrison - Butte MT, US
Jon P. Christophersen - Idaho Falls ID, US
Chester G. Motloch - Idaho Falls ID, US
Assignee:
BATTELLE ENERGY ALLIANCE, LLC - Idaho Falls ID
International Classification:
G01R 23/00
G01R 27/02
US Classification:
324603
Abstract:
Real-time battery impedance spectrum is acquired using a one-time record. Fast Summation Transformation (FST) is a parallel method of acquiring a real-time battery impedance spectrum using a one-time record that enables battery diagnostics. An excitation current to a battery is a sum of equal amplitude sine waves of frequencies that are octave harmonics spread over a range of interest. A sample frequency is also octave and harmonically related to all frequencies in the sum. A time profile of this sampled signal has a duration that is a few periods of the lowest frequency. A voltage response of the battery, average deleted, is an impedance of the battery in a time domain. Since the excitation frequencies are known and octave and harmonically related, a simple algorithm, FST, processes the time profile by rectifying relative to sine and cosine of each frequency. Another algorithm yields real and imaginary components for each frequency.

Cross Spectral Impedance Assessment For Cell Qualification

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US Patent:
20230091066, Mar 23, 2023
Filed:
Nov 23, 2022
Appl. No.:
17/993359
Inventors:
- Loveland CO, US
Jon P. Christophersen - Moscow ID, US
Assignee:
Dynexus Technology, Inc. - Loveland CO
International Classification:
G01R 31/389
G01R 31/396
Abstract:
A method for screening and matching cells for qualification and binning can include conducting a first and second impedance-based measurement of a cell separated by a rest interval of the cell and analyzing change/shift in the impedance spectrum obtained before and after the rest interval to afford algorithms to match, categorize, or group cells within a plurality of cells (C. . . C) that have the same, substantially the same, or fall within a range of structural or functional parameters based on the impedance change/shift in the impedance spectrum.
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Jon Petter Christophersen from Moscow, ID, age ~46 Get Report