How to measure the specific heat capacity of lithium-ion batteries?

4. conclusion ARC is the most widely used device for measuring the specific heat capacity of lithium-ion batteries. But measurement result of aluminum block shows an error of 9% when the air in the heat chamber is not pumped out. If the gas in the heat chamber is pumped out, the pressure would be too low and the relief valve may break.

How do you calculate the heat generation of a battery cell?

Therefore, the heat generation term is absorbed by the heat capacity term; in other words, the heat generation of the battery cell can be calculated via the rising temperature of the heat capacity term and the heat loss of the connectors.

What is the specific heat capacity of a battery?

The specific heat capacity of the battery is an essential parameter for the establishment of the thermal model, and it is affected by many factors (such as SOC, temperature, etc.). The scientific purpose of this paper is to collect, sort out and compare different measurement methods of specific heat capacity of battery.

Are empirical fitting methods suitable for calculating heat generation law of batteries?

It is a typical multi-parameter problem and traditional empirical fitting methods are not suitable. In this paper, based on the analysis of existing methods for calculating HGR of batteries, experiments were carried out on the heat generation law of 18 650 lithium batteries.

How is heat absorbed by a battery measured?

The heat power P absorbed by the battery is measured by the thermoelectric reactor. By this method, the specific heat capacity of the electric core at different SOC and temperature was studied. 2.2.3.

What determines a battery model's temperature?

The model’s temperature depends on the heat generated by losses in the battery cell (primarily Ohmic, activation, and mass transfer/concentration losses), the thermal mass of the battery cell, and the heat transfer to the environment.