01.06.2022 by Aileen Sammler

About the Efficiency of Charging and Discharging Processes in Lithium-Ion Accumulators

Energy storage has never been so important due to the climate change and the enormous increase in energy demand.

Energy storage has never been so important due to the climate change and the enormous increase in energy demand. A good battery capacity is a key factor here. This can be investigated by means of thermal analysis. By detecting the heat loss during charging and discharging, it is possible to evaluate the performance of a battery.

The NETZSCH Multiple Module Calorimeter (MMC)A multiple mode calorimeter device consisting of a base unit and exchangeable modules. One module is prepared for accelerating rate calorimetry (ARC), the ARC-Module. A second one is used for scanning tests (Scanning Module) and a third one is related to battery testing for coin cells (Coin Cell Module).Multiple Module Calorimeter (MMC) 274 Nexus® offers three different measurement modules. The Accelerating Rate Calorimetry (ARC)The method describing isothermal and adiabatic test procedures used to detect thermally exothermic decomposition reactions.ARC® Module can be used for so-called heat-wait-search (Heat-Wait-Search (HWS)Heat-Wait-Search is a measurement mode used in calorimeter devices according to accelerating rate calorimetry (ARC).HWS) tests or Thermal runawayA thermal runaway is the situation where a chemical reactor is out of control with respect to temperature and/or pressure production caused by the chemical reaction itself. Simulation of a thermal runaway is usually carried out using a calorimeter device according to accelerated rate calorimetry (ARC).thermal runaway tests; the Scanning ModuleA calorimeter module being part of the Multipe Module Calorimeter (MMC) allowing for scanning test of a sample. This procedure can serve as a screening test in order to detect a thermal hazard potential within a reasonably short measurement time.Scanning Module is suited for such applications as the evaluation of EndothermicA sample transition or a reaction is endothermic if heat is needed for the conversion.endothermic or ExothermicA sample transition or a reaction is exothermic if heat is generated.exothermic Phase TransitionsThe term phase transition (or phase change) is most commonly used to describe transitions between the solid, liquid and gaseous states.phase transitions as well as thermal hazard screening; and the Coin Cell ModuleA calorimeter module being part of the Multiple Module Calorimeter (MMC) allowing for scanning and isothermal tests of complete coins of variable size. The DSC-like twin design gives a differential signal of the heat signature during a heating ramp or charging and discharging of batteries.Coin Cell Module is specialized for the investigation of batteries.

 

Learn more about

  • Determination of the battery status and its influential factors
  • Illustration by means of the “ton model”
  • Energy losses during charging and discharging
  • Evaluation of the measurement results with the NETZSCH Proteus® software