Cambridge EnerTech’s

Optimizing Battery Management Systems & Charging Strategies

Lithium-Ion Battery Engineering Leading to Safer Batteries and Faster Charging

October 24, 2019


Optimizing battery management systems and charging are vital to successful battery integration. Creating versatile and well-designed battery management systems in a fast charge battery is one of the top hurdles battery engineers face. Hear from expert scientists as they provide insight on how to extend the life of their battery packs and decrease charging time.


7:00 am Registration

7:30 Continental Breakfast Breakout Discussion Groups*


8:30 Chairperson’s Remarks

Rengaswamy (Srini) Srinivasan, PhD, MD, Applied Physics Laboratory, The John Hopkins University

8:35 Validation of BMS Functional Safety by Means of Virtual Failure Injection and Hardware-in-the-Loop

Stefan Butzmann, PhD, Associate Professor, Faculty of Engineering, University of Wuppertal

With increasing share of electromobility and renewable energies, Functional Safety of BMS will become even more important than it is already today. Due to the rising complexity of battery systems, the design and validation of BMS regarding Functional Safety will also require higher effort. The presented tool helps to minimize these efforts without losing validity.

9:05 Impedance-Based Battery Management System for Safety Monitoring of Lithium-Ion Batteries

Rengaswamy (Srini) Srinivasan, PhD, MD, Applied Physics Laboratory, The John Hopkins University

This BMS ensures battery safety and efficiency by tracking and acting on emerging mismatches and electrical and thermal abnormalities in each individual cell without adding cost, volume, weight or power, compared to conventional BMS. Predicting a mismatch is essential for a battery’s safety and efficiency. Data for batteries with intentionally calendar-aged and over-discharged cells convincingly demonstrate that such BMS cannot identify cell mismatches and emerging failures. In contrast, the multifrequency impedance-based BMS tracks identify and act on changes in the internal state of each cell continuously in real time, including battery charging, discharging, and at rest.

9:35 Safety Behaviors of Lithium-Ion Battery Upon Mechanical Abusive Loading

Jun Xu, PhD, Professor, Mechanical Engineering and Engineering Science, University of North Carolina Charlotte

This talk presents an overview of a series of our recent work on safety behaviors of lithium-ion battery upon mechanical abusive loading from experiment, multiphysics modeling, and simulation. The proposed multiphysics model, as well as development methodology, lay a solid foundation towards design, evaluation, monitoring, and protection of lithium-ion batteries.

10:05 Coffee Break in the Exhibit Hall with Poster Viewing


10:35 Lithium Plating: A Critical Side Reaction in Lithium-Ion Cells

Thomas Waldmann, PhD, Accumulators Materials Research, ZSW

This presentation will detail the following: How lithium plating affects lifetime and safety; how to predict lithium plating; how to avoid lithium plating; and how to select charging protocols to avoid lithium plating.

11:05 Chemical and Mechanical Degradation and Mitigation Strategies for Si Anodes

Partha Mukerjee, PhD, Associate Professor, Mechanical Engineering, Purdue University

Atomistic and mesoscopic models are used to analyze cracking and stresses produced during charge of Si nanoparticles covered by a thin SEI film. Mechanical stresses coupled to chemical effects are investigated with classical molecular dynamics simulations and with a mesoscopic model. Rupture of the surface film is the main cause of capacity fade and damage evolution is strongly influenced by the structure of the solid film.

11:35 Battery Management Systems Toward Safer Batteries

Thomas Hoeger, Naval Surface Warfare Center

12:05 pm Sponsored Presentation (Opportunity Available)

12:35 Luncheon Presentation (Sponsorship Opportunity Available) or Enjoy Lunch on Your Own

1:05 Session Break


2:00 Chairperson’s Remarks

Naoki Matsumura, Senior Technologist, Intel Corporation

2:05 Special Considerations in Battery Management for Industrial Application

Yevgen Barsukov, PhD, Head of Algorithm Development, Battery Management Systems, Texas Instruments, Inc.

This presentation will cover these topics: SOH, SOC, degradation, and lifespan, as well as introduce new Texas Instruments gauge and protector devices that support up to 7 serial cells and are especially suitable for high-power industrial applications.

2:35 Power Electronic-Based Active Battery Energy Management Solutions for E-Transportation and Autonomous E-Mobility

Sheldon Williamson, PhD, Professor, University of Ontario

Fundamental topologies of power electronic converters, specifically utilized for bidirectional current flow in cell balancing applications, will be discussed. The design, implementation, and testing/validation of an active cell equalization circuit for a traction Li-ion battery pack will also be presented.


3:05 Battery Cycle Life Extension by Charging Algorithm

Naoki Matsumura, Senior Technologist, Intel Corporation

IOT devices expect Li-ion batteries to have a long cycle life because they may be used in areas where battery replacement is not easy. This session talks about a method to extend battery cycle life through a battery charging algorithm. This is expected to reduce the cost of ownership as it enables less battery replacement.

3:35 Refreshment Break in the Exhibit Hall. Last Chance for Poster Viewing.

4:15 Fast Charging of Lithium-Ion Batteries at All Temperatures

Chao-Yang Wang, PhD, William E. Diefenderfer Chair Professor, Director, Electrochemical Engine Center (ECEC), Co-Director, Battery & Energy Storage Technology (BEST) Center, The Pennsylvania State University

Range anxiety is a key reason that consumers are reluctant to embrace electric vehicles (EVs). To be truly competitive with gasoline vehicles, EVs should allow drivers to recharge quickly anywhere in any weather, like refueling gasoline cars. However, none of today’s EVs allow fast charging in cold or even cool temperatures due to the risk of lithium plating, the formation of metallic lithium that drastically reduces battery life and even results in safety hazards. Here, we present an approach that enables 15-minute fast charging of Li-ion batteries in any temperatures (even at −50 °C) while still preserving remarkable cycle life (4,500 cycles, equivalent to >12 y and >280,000 miles of EV lifetime), thus making EVs truly weather-independent.

4:45 How a Sustainable Charging Infrastructure Can be Built

Uwe Kirchner, Senior Expert, PMM ATV Application Engineering, Infineon Technologies Austria AG

This talk will cover key aspects that must be covered to build a successful charging infrastructure.

5:15 Close of Optimizing Battery Management Systems & Charging and Dinner Workshop Registration

5:308:30 Dinner Workshop*

W3: Active Battery Energy Management Systems & Charging

Sheldon Williamson, PhD, Professor and NSERC Canada Research Chair in Electric Energy Storage Systems for Transportation Electrification, Department of Electrical, Computer and Software Engineering, University of Ontario

This tutorial will give attendees an overview of battery systems design. More closely it will cover key aspects of successful battery management systems and charging.

*Separate registration required.

* The program is subject to change without notice, due to unforeseen reason.

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