The LVFU ess 261kWh thermal management system in this energy storage cabinet consists of a liquid cooling unit, a liquid cold plate, and a liquid cooling pipeline. Specifically, the liquid cooling unit actively dissipates heat and ensures precise temperature control for the energy storage equipment by circulating the cooling medium.

Liquid Cooling Parameters

Rated flow rate of liquid-cooled unit	30L/min
Maximum flow rate of liquid-cooled unit	50L/min
Cooling medium	50% ethylene glycol aqueous solution

The main functions include

The system supports four operating modes. In refrigeration mode, the compressor refrigeration cycle actively lowers the temperature of the cooling medium. When heating is required, a built-in electric heater directly warms the cooling medium. Alternatively, in self-circulation mode, only the water pump is activated, with no cooling or heating taking place. Finally, auto mode automatically switches between cooling and heating based on the set temperature, ensuring stable and consistent temperature control.

Workflow

Refrigeration cycle

• The refrigerant (R410A) absorbs the heat of the cooling medium in the evaporator and vaporizes into a cryogenic gas.
• The compressor compresses the gas into a high-temperature and high-pressure state and delivers it to the condenser for heat dissipation and liquefaction.
• The liquid refrigerant is throttled and depressurized by the expansion valve before re-entering the evaporator cycle.

Cooling medium circulation

• The water pump drives the glycol mixture to flow through the evaporator for cooling and conveying it to the energy storage device to absorb heat.
• The high-temperature cooling medium is returned to the unit and cooled again to form a closed loop.

Control process

• After setting the target temperature, the unit automatically adjusts the operation of the compressor, water pump and heater.
• Real-time monitoring of liquid temperature, pressure, flow rate and other parameters, trigger alarm or shutdown protection when abnormal.