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What's in the energy storage container?


Many people are curious, what exactly is inside the energy storage container?

First of all, a complete electrochemical energy storage system (ESS) is mainly composed of battery, battery management system (BMS), energy management system (EMS), power conversion system (PCS) and other electrical equipment. Among them, the battery is the most important component of the energy storage system, and it is also the part with the largest cost.


Let's look at the battery first. ESS, like photovoltaics, also has an industrial chain. The battery is in the midstream of ESS. Its role is mainly to monitor, evaluate, protect, and balance batteries. But how much does it cost?

In the composition of the ESS, the battery, which accounts for 60% of the cost, is undoubtedly the component with the biggest cost. Leading battery companies such as CATL and BYD have obvious advantages in this.

The second place is the power storage converter (PCS), which is the core component of the energy storage system, accounting for about 20% of the cost. Its function is mainly to control the charging and discharging process of the energy storage battery, and to convert AC to DC.

The third is the energy management system (EMS), which is mainly responsible for data collection, network monitoring and energy scheduling.


In addition, how does the energy storage system avoid fire? It is also a topic of great concern to everyone.

The fire protection system is also very important, yes, don’t underestimate this container, there is also a fire protection system inside. Some people have their doubts: Since there is a fire protection system, why are there so many fire in the news?

In fact, the fire of the energy storage battery should be detected and controlled earlier. Once an accident occurs, the fire should be controlled within a certain range as much as possible. This is the main function of the fire protection system, to avoid spreading to the surroundings and causing the accident to expand.

As mentioned above, the energy storage system adopts a walk-in design. What is "walk-in"? Generally speaking, there is an escape door that can be accessed, and the aisle where people can walk in the middle.


Someone said: "I have seen energy storage containers without doors, just one box."

Yes, since there are "walk-in", there are also "non-walk-in". What are the design features of containers with non-walk-in design? First of all, the temperature difference between the battery clusters is small; the external maintenance safety of each component of the container is higher; in this way, the safe escape space is saved, and the space utilization rate of the container is improved.

Regarding the design of the energy storage system container, some factories can even provide customization (but the cost is higher), and the internal structure does not necessarily have to be exactly the same. But in order to be more intuitive, we asked Amensolar, a mature energy storage solution provider in the industry, to take a 0.5MW/1MWh energy storage system as an example, and attach a configuration list for your reference.