Meaning
Thermal management in electrochemical power systems uses power-consuming auxiliary devices to drive heat exchange. This process, referred to as active cooling, involves pump-driven liquid loops or fan-driven air channels to transport thermal energy away from the cell faces. The method maintains cell surface temperatures within safe boundaries during heavy charge or discharge.
Cooling Method
Heat dissipation by mechanical means provides precise temperature control. Systems designed with active cooling can adjust pump speeds based on temperature sensors distributed throughout the pack. This control loop helps prevent localized thermal runaways.
Thermal Regulation
Liquid glycol mixtures are often circulated through internal cooling plates to draw thermal energy away from the core of the module. Such active cooling designs provide higher heat transfer coefficients than passive thermal pads or natural air currents. Heat is transferred from these integrated plates to an external heat exchanger, which allows the pack to maintain a highly uniform temperature profile during rapid-charging operations and helps to prevent accelerated differential aging between series-connected cells.
Integration Cost
System complexity increases with the addition of valves and pumps. Implementing active cooling demands higher upfront manufacturing expenditure but extends battery life under severe cycles. It remains a standard choice for high-power electric vehicle battery packs.
