P1-063
The electrolyte solution inside a battery plays a crucial role in both performance and longevity. Its volatile nature and limited quantity make it difficult to examine—especially in heavily aged commercial cells. This method focuses on such cells but is designed to be broadly compatible with other formats and future battery types. To analyze the electrolyte, […]
P5-047_Mueller
Will be delivered soon.
P4-012
This work will demonstrate the performance of a battery energy storage system (BESS) designed for long duration energy storage thorough time-shifting photovoltaic (PV) power production in Nordic climate. The BESS has an energy capacity of 300kWh, a power capacity of 100kW, and the cells are of NMC-type in pouch-format. All components are installed in a […]
P3-058
This work aims to take a deeper look at the feasibility of using pulses to estimate the impedance spectrum of a battery module, which consists of several battery cells in series. Regarding the existing literature, there are two main aspects we wanted to explore. One is to have high speed voltage and current measurements with […]
P3-026
To maintain losses and cooling efforts of growing capacity and power rating of battery energy storage systems the battery system voltage will have to be increased significantly. Hence novel high voltage battery energy storage systems (HV-BESS) are the subject of development in various cases with high power demands in mobile and static applications. In contrast […]
ZSW
Accurate determination of the Coulomb Efficiency (CE) is essential for reliable assessment of battery aging. In this paper, we present a highly accurate measurement system developed at ZSW that minimises errors caused by mechanical, electromagnetic and thermal interferences. By implementing strict cycling protocols, optimised shunt design and zero offset compensation, our method provides more accurate […]
P4-011
Typical behind-the-meter (BTM) services leave unused flexibility. Literature lacks applicable methods to activate additional revenue streams while still delivering BTM applications. This work presents a real-time controller to identify available flexibility during BTM operation and models an interface to a trading entity. We quantify revenue potentials based on order book data and load measurement from […]
P1-037
LiFePO₄ (LFP) cathode is one of the most widely used cathode materials in commercial lithium-ion batteries due to its excellent thermal stability, long cycle life, and safety. However, its relatively low specific capacity limits the energy density of cells utilizing this material. To address this limitation, replacing the conventional graphite anode with prelithiated silicon oxide […]
P4-010
The current transformation of the automotive sector, particularly through electrification, poses numerous challenges. In particular, the availability of a skilled workforce and thus the qualification of employees will be a key challenge for industry. This transformation could result in an estimated 300,000 to 1 million jobs in Europe by 2030 in the areas of battery […]
P3-068
Ultrasonic measurements offer insights into cell behavior and aging during cycling. For the Graphite/NMC cell tested, the ToF consistently increased during charging and decreased during discharging likely due to changes in density and Young’s modulus of the graphite anode. A two-week cycling pause at cycle 100 led to a temporary drop in ToF, followed by […]