MIDTRONICS Advancing Battery Management

Innovative Technologies

Midtronics is founded on innovation and technical expertise. The company's nearly 30-year history has resulted in a significant portfolio of patents and other intellectual property that are at the heart of new products and technologies for effective battery management. Further, the Midtronics engineering staff continually seeks to expand the technology related to battery testing and charging. This continued creativity and diligence in creating and improving our core technology will help to maintain our leadership position in battery testing. Following is our list of U.S. patents. Many of these are also covered in patents and patent applications globally.

3,873,911
Electronic battery testing device
Inventor: Keith S. Champlin

3,909,708
Electronic battery testing device
Inventor: Keith S. Champlin

4,322,685
Automatic battery analyzer including apparatus for determining presence of single bad cell
Inventors: Charles E. Frailing, Thomas Dougherty, Richard Johnson

4,816,768
Electronic battery testing device
Inventor: Keith S. Champlin

4,825,170
Electronic battery testing device with automatic voltage scaling
Inventor: Keith S. Champlin

4,881,038
Electronic battery testing device with automotive voltage scaling to determine dynamic conductance
Inventor: Keith S. Champlin

4,912,416
Electronic battery testing device with state-of-charge compensation
Inventor: Keith S. Champlin

5,140,269
Electronic tester for assessing battery / cell capacity
Inventor: Keith S. Champlin

5,343,380
Method and apparatus for suppressing time-varying signals in batteries undergoing charging or discharging
Inventor: Keith S. Champlin

5,469,043
Method for optimizing the charging of lead-acid batteries and an interactive charger
Inventors: Jing-Yih Cherng, James K. Klang

5,572,136
Electronic battery testing device
Inventor: Keith S. Champlin

5,574,355
Method and apparatus for detection and control of thermal runaway in a battery under charge
Inventors: Stephen J.McShane, Mark Hlavac, Kevin I. Bertness

5,583,416
Apparatus and method for step-charging batteries to optimize charge acceptance
Inventor: James K. Klang

5,585,728
Electronic battery tester with automatic compensation for low state-of-charge
Inventor: Keith S. Champlin

5,589,757
Apparatus and method for step-charging batteries to optimize charge acceptance
Inventor: James K. Klang

5,592,093
Electronic battery testing device loose terminal connection detection via a comparison circuit
Inventor: August G. Klingbiel

5,598,098
Electronic battery tester with very high noise immunity
Inventor: Keith S. Champlin

5,656,920
Method and apparatus for charging a lead-acid battery
Inventors: Jing-Yih Cherng, James K. Klang

5,757,192
Method and apparatus for detecting a bad cell in a storage battery
Inventors: Stephen J. McShane, Kevin I. Bertness

5,821,756
Electronic battery tester with tailored compensation for low state-of-charge
Inventors: Stephen J. McShane, Kevin I. Bertness, Keith S. Champlin

5,831,435
Battery tester for JIS standard
Inventor: Michael E. Troy

5,871,858
Anti-theft battery
Inventors: Jes Thomsen, Tore Rehnberg

5,914,605
Electronic battery tester
Inventor: Kevin I. Bertness

5,945,829
Midpoint battery monitoring
Inventor: Kevin I. Bertness

6,002,238
Method and apparatus for measuring complex impedance of cells and batteries
Inventor: Keith S. Champlin

6,037,751
Method and apparatus for charging batteries
Inventor: James K. Klang

6,037,777
Method and apparatus for determining battery properties from complex impedance / admittance
Inventor: Keith S. Champlin

6,051,976
Method and apparatus for auditing a battery test
Inventor: Kevin I. Bertness

6,081,098
Method and apparatus for charging a battery
Inventors: Kevin I. Bertness, Stephen J. McShane

6,091,245
Method and apparatus for auditing a battery test
Inventor: Kevin I. Bertness

6,104,167
Method and apparatus for charging a battery
Inventors: Kevin I. Bertness, Stephen J. McShane

6,137,269
Method and apparatus for electronically evaluating the internal temperature of an electrochemical cell or battery
Inventor: Keith S. Champlin

6,163,156
Electrical connection for electronic battery tester
Inventor: Kevin I. Bertness

6,172,483
Method and apparatus for measuring complex impedance of cells and batteries
Inventor: Keith S. Champlin

6,172,505
Electronic battery tester
Inventor: Kevin I. Bertness

6,222,369
Method and apparatus for determining battery properties from complex impedance / immittance
Inventor: Keith S. Champlin

6,225,808
Test counter for electronic battery tester
Inventors: Philip Varghese, Michael Cable, Michael E. Troy, David Lewis

6,249,124
Electronic battery tester with internal battery
Inventor: Kevin I. Bertness

6,259,254
Apparatus and method for carrying out diagnostic tests on batteries and for rapidly charging batteries
Inventor: James K. Klang

6,262,563
Method and apparatus for measuring complex immittance of cells and batteries
Inventor: Keith S. Champlin

6,294,896
Method and apparatus for measuring complex self-immittance of a general electrical element
Inventor: Keith S. Champlin

6,294,897
Method and apparatus for electronically evaluating the internal temperature of an electrochemical cell or battery
Inventor: Keith S. Champlin

6,304,087
Apparatus for calibrating electronic battery tester
Inventor: Kevin I. Bertness

6,310,481
Electronic battery tester
Inventor: Kevin I. Bertness

6,313,607
Method and apparatus for evaluating stored charge in an electrochemical cell or battery
Inventor: Keith S. Champlin

6,313,608
Method and apparatus for charging a battery
Inventors: Phillip Varghese, Kevin I. Bertness, Stephen J. McShane

6,316,914
Testing parallel strings of storage batteries
Inventor: Kevin I. Bertness

6,323,650 B1
Electronic battery tester
Inventors: Kevin I. Bertness, Jamey L. Butteris

6,329,793
Method and apparatus for charging a battery
Inventors: Kevin I. Bertness, Stephen J. McShane

6,331,762
Energy management system for automotive vehicle
Inventor: Kevin I. Bertness

6,332,113
Electronic battery tester
Inventor: Kevin I. Bertness

6,351,102
Automotive battery charging system tester
Inventor: Michael E. Troy

6,359,441
Electronic battery tester
Inventor: Kevin I. Bertness

6,363,303
Electronic battery tester
Inventor: Kevin I. Bertness

6,377,031
Intelligent switch for power management
Inventors: Samy Karuppana, Aly Jetha, Jes Thomsen

6,392,414
Electronic battery tester
Inventor: Kevin I. Bertness

6,417,669
Suppressing interference in AC measurements of cells, batteries and other electrochemical measurements
Inventor: Keith S. Champlin

6,424,158
Apparatus and method for carrying out diagnostic tests on batteries and for rapidly charging batteries
Inventor: James K. Klang

6,437,957
System and method for providing surge, short and reverse polarity connection protection
Inventors: Samy Karuppana, Aly Jetha, Jes Thomsen

6,441,585
Apparatus and method for testing rechargeable energy storage batteries
Inventor: Kevin I. Bertness

6,445,158
Vehicle electrical system tester with encoded output
Inventors: Kevin I. Bertness, Michael E. Troy

6,456,045
Integrated conductance and load test based electronic battery tester
Inventors: Michael E. Troy, Kevin I. Bertness

6,465,908
Intelligent power management system & head lamp life extender with daytime running light control
Inventors: Samy Karuppana, Aly Jetha, Jes Thomsen

6,466,025
Alternator tester
Inventor: James K. Klang

6,466,026
Programmable current exciter for measuring AC immittance of cells and batteries
Inventor: Keith S. Champlin

6,469,511
Battery clamp with embedded environment sensor
Inventors: David J. Vonderhaar, Kevin I. Bertness

6,495,990
Method and apparatus for evaluating stored charge in an electrochemical cell or battery
Inventor: Keith S. Champlin

6,497,209
System and method for protecting a cranking subsystem
Inventors: Samy Karuppana, Aly Jetha, Jes Thomsen

6,507,196
Battery charge indicator
Inventors: Jes Thomsen, Tore Rehnberg

6,534,993
Electronic battery tester
Inventor: Kevin I. Bertness

6,544,078
Battery clamp with integrated current sensor
Inventors: A.J. Palmisano, Kevin I. Bertness

6,556,019
Electronic battery tester
Inventor: Kevin I. Bertness

6,566,883
Electronic battery tester
Inventors: Kevin I. Bertness, David J. Vonderhaar

6,586,941
Battery tester with databus
Inventors: Kevin I. Bertness, Stephen J. McShane

6,597,150
Method of distributing jump start booster packs
Inventors: Kevin I. Bertness, Ronald J. Ortiz

6,621,272
Programmable current exciter for measuring AC immittance of cells and batteries
Inventor: Keith S. Champlin

6,621,314
Kelvin clamp for electrically coupling to a battery contact
Inventors: Kevin I. Bertness, Jamey L. Butteris, Daniel C. Cox

6,633,165
In-vehicle battery monitor
Inventor: Kevin I. Bertness

6,635,974
Self-learning power management system and method
Inventors: Aly Jetha, Samy Karuppana, Jes Thomsen

6,696,819
Battery charge control device
Inventor: Kevin I. Bertness

6,707,303
Electronic battery tester
Inventors: Kevin I. Bertness, Jamey L. Butteris

6,871,151
Electronic battery tester with network communication
Inventor: Kevin I. Bertness

6,885,195
Method and apparatus for auditing a bettery test
Inventor: Kevin I. Bertness

6,906,522
Battery tester with battery replacement output
Inventors: Kevin I. Bertness, William G. Sampson

6,906,523
Method and apparatus for testing cells and batteries embedded in series / parallel systems
Inventors: Kevin I. Bertness, Keith S. Champlin

6,909,287
Energy management system for automotive vehicle
Inventor: Kevin I. Bertness

6,913,483
Cable for electronic battery tester
Inventors: Harvey A. Restaino, Edward J. Amato

6,914,413
Alternator tester with encoded output
Inventors: Kevin I. Bertness, Michael E. Troy

6,930,485
Electronic battery tester with battery failure temperature determination
Inventor: Kevin I. Bertness

6,933,727
Electronic battery tester cable
Inventor: Kevin I. Bertness

6,941,234
Query-based electronic battery tester
Inventor: Kevin I. Bertness

7,081,755
Battery tester capable of predicting a discharge voltage/discharge current of a battery
Inventors: James K. Klang, Gregory P. Fang

7,106,070
Broadband low-conductance cables for making kelvin connections to electrochemical cells and batteries
Inventors: Kevin I. Bertness, Keith S. Champlin

7,154,276
Method and apparatus for measuring a parameter of a vehicle electrical system
Inventor: Kevin I. Bertness