Trident™ Application Highlight: Specific Heat Capacity Characterization of Battery Cells Using the TPS Cp Utility
This document highlights the use of the Transient Plane Source (TPS) Cp Utility for non-destructive measurement of specific heat capacity (Cp) in lithium-ion pouch and cylindrical battery cells.
Specific heat capacity (Cp) is the amount of thermal energy a battery cell can absorb before its temperature rises appreciably. In a battery system, this property governs the thermal buffer available during high-rate charge and discharge events: cells with higher Cp can absorb more heat before approaching critical temperature thresholds, improving safety margins and cycle life under demanding conditions.
Figure 1: Battery cells generating heat during operation.
Measurements were performed using the Trident Instrument equipped with the Transient Plane Source (TPS) sensor Cp Utility. Both a 3.8 V Li-ion pouch cell and a 21700 Li-ion cylindrical cell were tested at room temperature.
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