Thermophysical Parameter Measurements for Lithium-Ion Batteries: A Review

Thermophysical parameters of lithium-ion batteries are the basis for building battery thermal models and one of core factors to determine model performance. The lumped parameter method depends on constitutions, structures, dimensions, techniques, and etc. so that the calculated battery specific heat capacity and themal conducticity have bad accuracies and adaptabilities. Hence, measurements and factors of thermophysical parameters of lithium-ion batteries are generalized and analysized through literature investigation. Results show that battery specific heat capacity and themal conductivity measurements were conducted seperatedly, of which methologies are categorised as the standard instrument (program) method and self-made test apparatuse mehtod. Their measurement costs, complexities, and errors are different. Furthermore, these battery thermophysical parameter values are influenced by kinds of factors such as cell materials, shapes, capacities, SOCs, SOHs, and temerpatures. The specific heat capacity is closely related to battery shapes, and the themal conductivity significantly changes with battery SOHs. In summary, to measure battery thermophysical parameters should be scaled, small, simple, adaptable, and low cost. © 2019 Journal of Mechanical Engineering.