Maintaining batteries at proper temperatures is critical to ensure the long life of the battery and to avoid premature degradation. Our cooling solution is a combined liquid / air cooling system. Cold water is used to cool the air in the battery room. Fans blow the air through each module, directly cooling the surfaces of the cells so as to ensure a uniformly cooled system.
The control system manages all the battery racks and offers a single interface to the ship Power Management System, as well as an HMI and operator panel showing full battery status. Remote monitoring can be enabled.
Each sub-system comes with bus bars and electronics and specific safety features including fuses, circuit breakers and emergency shut-down systems.
To prevent humid, salty air coming in contact with the batteries’ modules, the BESS is housed in an unventilated, air-tight room. Nidec’s design of a closed-loop dual heating and cooling system uses an air-to-water heat exchanger to maintain the battery’s internal temperature within the prescribed range of 18°C to 28°C. This project was developed together with ZEM using LG Chem batteries.
This is not the first time the two companies have collaborated together to deliver world class energy storage systems in the maritime sector.