Why Is A Liquid Cooling Temperature Control System So Important For Lithium Ion Battery?
Liquid cooling temperature control system is important for lithium ion battery life. If the battery exceeds its normal operating temperature, it may experience chemical runaway, which not only leads to a decrease in the battery’s cycle life and calendar life, but may even cause more serious safety accidents.
HOW TO IMPROVE BATTERY PERFORMANCE
For energy storage systems, it is extremely important to keep battery cells within the proper temperature range at all times. An effective temperature control system not only ensures safety and longevity, but also improves performance and efficiency.
Energy storage temperature control technology solutions are mainly divided into two types: air-cooled and liquid-cooled.
Air-cooling is a simple structure that uses low-temperature air as the medium and natural wind or fans to generate thermal convection with the battery cells, thereby lowering the battery temperature.
In contrast, the liquid cooling programme uses coolant such as water, ethanol, refrigerant, etc., which is in indirect contact with the battery cells through the uniformly distributed guide grooves on the liquid-cooled plate, which is close to the heat source, has a high heat exchange efficiency, consumes low energy, and ensures the consistency of the temperature of the battery cells.
In this process, we need to focus on two issues.
Control the surface temperature and humidity of individual cells
(1) Maintaining the optimal working temperature and humidity is the basis of temperature control. The first shift requires the working temperature of the point and to be +15 ℃ ~ +35 ℃; relative humidity between 5% ~ 95%, no condensation.
(2)Avoid local hot spots in the battery system,the temperature difference between the batteries should not be more than 3 ℃, in order to avoid local hot spots; At present, the temperature control method of the energy storage temperature control system is gradually shifting to liquid cooling.
COMPOSITION OF ENERGY STORAGE LIQUID COOLING TEMPERATURE CONTROL SYSTEM
Data shows that the heat dissipation capacity of liquid is 3000 times that of air, and the thermal conductivity is 25 times that of air. Compared with air cooling technology, the use of liquid cooling technology can realise rapid heat dissipation and conduction, which can improve the efficiency of temperature control, reduce thermal runaway, and make the temperature transfer faster and better. The liquid cooling temperature control system manages the battery through the steps of energy storage, discharge, heat dissipation and temperature control.
The refrigerant releases the heat absorbed by the cold plate of the battery through the evaporator and enters the cold plate again to absorb the heat generated by the equipment by using the power generated by the water pump; the heat absorbed by the evaporator from the refrigerant circulating system is absorbed and compressed through the evaporation of the refrigerant, and then it enters the condenser to release the heat to the surroundings of the air environment. The condensed refrigerant returns to the evaporator through the expansion valve; then evaporates again, and so on.
Energy Storage Battery Cooling Plate
Liquid Cooling Plate for Energy Storage Batteries is a heat dissipation technology for energy storage batteries, which can effectively control the temperature of the battery and improve the service life and safety of the battery. The liquid cooler absorbs the heat generated by the battery through liquid circulation, thus lowering the battery temperature.
Working Principle of Liquid Cooling Plate
The principle is to use non-conductive liquid as a cooling medium to achieve uniform heat dissipation within the battery pack. Sensors detect the temperature of the battery pack and the temperature control system regulates the temperature of the coolant to ensure that the temperature of the battery pack remains consistent. It effectively reduces the temperature rise of the battery pack, prevents hot spots from arising, reduces the temperature gradient, and extends the service life of the battery.
Overall, the temperature control of the storage battery is very important, it not only affects the life of the battery, in some areas, it is even an indispensable part of some families, there is no doubt about the safety of the choice of a self-regulating battery temperature control will be the formation of the trend of home energy storage system.
LeferEss’ liquid cooled battery feature car-level safety ratings and are more cost-effective compared to the Tesla powerwall, making them a great choice for setting up your home energy storage system.