Thermal transfer battery

How does a battery thermal management system work?

Convection heat transfer between the air entering the system and the battery cells is the primary method of heat transfer in the active air-cooled battery thermal management system. Cold air is introduced at the beginning of the airflow, where it absorbs and removes the heat produced by the battery by exchanging heat with the battery cells.

Are battery thermal management systems effective?

Deploying an effective battery thermal management system (BTMS) is crucial to address these obstacles and maintain stable battery operation within a safe temperature range. In this study, we review recent developments in the thermal management and heat transfer of Li-ion batteries to offer more effective, secure, and cost-effective solutions.

How effective is heat transfer between a battery cell and a PCM?

The effectiveness of heat transfer between the battery cell and the PCM relies heavily on the thermal conductivity of the PCM itself. However, PCMs often exhibit suboptimal heat transfer performance due to their inherently low thermal conductivity.

Are two-phase heat transfer strategies effective in battery thermal management?

Besides, other two-phase heat transfer strategies have been put forward, such as water evaporation, vapor chamber and dew-point evaporation. Although these approaches have good performance in battery thermal management, their applicability require further exploration in terms of experimental and numerical aspects.

How to reduce heat transfer rate in battery cells?

The heat transfer rate can be reduced by including PCM, heat pipes, or other cooling technologies to decelerate or postpone thermal runaway propagation in battery cells. Insulating the inner case of the battery cell can also help. Download: Download high-res image (547KB)

Why does the heat transfer coefficient of a battery change with temperature?

The main reason is that with the increase in battery temperature, the heat transfer coefficient of the boiling heat transfer process gradually changes, necessitating an analysis of the heat transfer characteristics at the battery interface.