World First Grid Scale Liquid Air Energy Storage

Does liquid-cooling reduce the temperature rise of battery modules?

Under the conditions set for this simulation, it can be seen that the liquid-cooling system can reduce the temperature rise of the battery modules by 1.6 K and 0.8 K at the end of charging and discharging processes, respectively. Fig. 15.

Can lithium-ion batteries be used as energy storage systems?

As electric vehicles (EVs) are gradually becoming the mainstream in the transportation sector, the number of lithium-ion batteries (LIBs) retired from EVs grows continuously. Repurposing retired EV LIBs into energy storage systems (ESS) for electricity grid is an effective way to utilize them.

Can liquid cooling system reduce peak temperature and temperature inconsistency?

The simulation results show that the liquid cooling system can significantly reduce the peak temperature and temperature inconsistency in the ESS; the ambient temperature and coolant flow rate of the liquid cooling system are found to have important influence on the ESS thermal behavior.

What is the temperature difference between battery modules?

The temperature field distribution of different modules is basically the same, and the temperature consistency between the battery modules is good. For no liquid cooling, from the initial temperature, the maximum temperature rise of the modules is 3.6 K at the end of the charging process and 3 K at the end of discharging process.

How does coolant cooling affect battery temperature?

With the coolant cooling system on, the battery temperature decreases first, and then increases when the DOD reaches about 0.55. The reason for this trend is that at the beginning of the discharge the LIBs have endothermic entropic reaction. As the flow rate of coolant increases, the temperature of the battery decreases more.

Which heat transfer mode is considered inside a battery?

Only heat conduction is considered inside the battery, while other heat transfer modes are neglected. The thermal conductivity of the battery is anisotropic, different directions have different thermal conductivity values. iv.