Electric car charging
Product Update

Improving the Accuracy of Battery Models Using the Open-Circuit-Voltage (OCV) Curve

April 8, 2024

The OCV is a key element in electric models of lithium-ion batteries and describes the thermodynamic voltage at equilibrium. In this article, we describe how considering OCV aging is vital when designing and manufacturing electric cars.

Electric car charging
from TWAICE
Download the content
No items found.

twaicetech

TWAICE helped me to learn more about: read article here:

www.twaice.com/article/

#thinktwaice

Improving the Accuracy of Battery Models Using the Open-Circuit-Voltage (OCV) Curve

The OCV is a key element in electric models of lithium-ion batteries and describes the thermodynamic voltage at equilibrium. It refers to the voltage of the battery when it is not connected to a load or a charging device.

Unfortunately, the change of this OCV curve over aging is often neglected in battery modeling, resulting in challenges regarding accuracy of battery models over battery lifetime.

In this article, we describe how considering OCV aging is vital when designing and manufacturing electric cars:

  • How the OCV curve can be used for estimating State of Charge
  • How the OCV curve can help manufacturers ensure the correct battery size
  • Integrating OCV aging into battery modeling

Download the article
Webinar

Product Webinar: What’s New with TWAICE Energy Analytics (Spring '25 Edition)

Join our next product webinar and discover the latest features designed to support BESS owners and operators, improve performance, ensure warranty compliance, and maximize revenue.

View Webinar
Recent Posts:

Related Resources

System-level RTE
PRODUCT UPDATE

Track Warranty Contracts and Optimize Performance Using Roundtrip Efficiency (RTE)

Roundtrip Efficiency (RTE), one of the most important BESS KPIs, can now be tracked in TWAICE Energy Analytics. TWAICE calculates it based on the battery, inverters and transformers efficiencies, helping asset owners & operators track warranty contracts more accurately.
TWAICE usable and recoverable energy KPIs
PRODUCT UPDATE

Optimize BESS Performance by Recovering Lost Energy

TWAICE's newest features, Usable and Recoverable Energy, help asset owners and operators to improve system availability and performance. In this article, we explore how and why.
Fast charging EV
PRODUCT UPDATE

Unlock Next Generation Fast Charging with TWAICE Anode Potential Model

Fast charging is a key differentiator for OEMs, but avoiding lithium plating remains a fundamental challenge in lithium-ion battery system design. Lithium plating can lead to capacity loss and severe safety risks—until now.