2.1 Introduction the to system
Our 20C series of BESS adopts 20-foot standard shipping containers, with AC and DC integrated, 100% pre-install and factory tested, which is convenient for transportation and on-site installation. The rated power of the system is 1200kW and the electric quantity is 2256kwh.
The interior of the container contains a lithium iron phosphate battery system, battery management system, energy storage bidirectional conversion, energy management system, environmental control system, fire protection system and other subsystems.
Main features of energy storage products:
High system integration, space saving, rapid installation and deployment.
20 foot TEU provides up to 1.2MW/2.25MWh capacity;
DC modular design, linearly expandable battery unit.
High voltage series PCS module design, with independent inverters for each battery string.
Decoupling between battery strings, high capacity utilization.
Advanced battery management system, providing perfect measurement and protection functions.
Fault classification processing mechanism to respond to preset fault scenarios.
Automatic exit mechanism of fault branch to ensure the stable operation of the whole system.
Plug and play at delivery, low installation, operation and later maintenance costs.
690Vac output, which can meet customers' different grid needs through external step-up and step-down transformer cabinets.
This energy storage product can be used in new energy power stations to stabilize fluctuations and absorb power, peak shaving, frequency modulation and voltage regulation at the power grid side, peak shaving and at the industrial and commercial user side, load fluctuation stabilization, photovoltaic + energy storage + EV charging integrated power station and other application fields.
Figure 2-1 Schematic diagram of energy storage system
As shown in Figure 2-1, the 20C2H1200K energy storage system consists of energy storage batteries, GPC box, air conditioners, firefighting, auxiliary equipment, etc. (the equipment in the gray dotted box is provided by Supplier, and the transformer is provided by the customer).
PCS supplies AC power to the load via the insulated transformer. The system can change the output power and charge discharge period according to the actual project requirements and corresponding operation strategies.
GPC controller is the control core of the Energy storage system, which controls the energy flow of the whole Energy storage products to ensure safe, reliable, and smooth operation of the system.
2.2. Working Mode
The energy storage system has two operating modes: Constant AC power mode and Stop mode.
Figure 2-2 Operation mode setting interface
Table 2-1 Description of system operation mode
Model | Description |
Constant AC power | Running state: positive number is discharge, negative number is charging In charging state, the system converts alternating current from the grid into chemical energy stored in the battery In discharge state, the system converts chemical energy in the battery into electric energy and discharges it to the grid Failure occurrence When the system detects a fault signal, it switches to shutdown mode Receive stop order When the system receives stop instruction, it will switch to stop mode |
Stop | System stop working |
2.3. Model Definition
The 20C2H1200K, 20C2H1000K are energy storage products, their rated power is up to 1,200 kW and the nominal capacity up to 2,256kWh. The 20ft Energy storage product container external dimension is indicated as below:
Figure 2-3 System appearance
2.4. Nameplate
Note: The technical specification on the nameplates have different Nominal Battery Energy, Power Input and Output and Current Input and Output based on the model.
SN | Sign | Description |
1 | System name | |
2 | Major technical specifications | |
3 |
| The equipment is electrified. Do not touch it |
4 |
| The system is a power electronic product and has potential risks, especially after it is powered on. It must be operated by professional personnel with safety protection measures taken. |
5 |
| When the system is running, the surface (especially the radiator part) has a high temperature. Do not touch it directly to avoid burns. |
6 |
| To Reduce the Risk of Injury, read all instructions |
2.5. Technical Data
Item | Energy storage system |
Model | 20C2H1200K | 20C2H1000K |
Battery string type | LPF Lithium-ion S407-24P16 |
Battery capacity | 2,256kWh | 1,880kWh |
Rated battery voltage | 1,222.8Vdc |
Battery voltage range | 1,075.2Vdc-1,363.2Vdc |
Standard charging method manufacturer | Constant power |
AC rated voltage | 690Vac@3W+PE |
AC rated voltage frequency | 50/60Hz |
AC rated voltage power | 1200kW | 1000kW |
AC rated voltage current | 167.35A(Each String) |
Operating temperature range | -35℃ ~+ 40℃ |
Storage temperature range | -30℃ ~+60℃ |
Operating humidity range | ≤95% |
Altitude | 3,000m |
Cooling | Air cooling |
Fire fighting system | HFC-227ea gas or FK-5-1-12 gas fire fighting system |
Communication interface | Ethernet |
Communication protocol | Modbus TCP |
Protective Class | IP54 |
Size（W*D*H） | 6,058*2,438*2,591 mm |
Weight | < 26.5t |
Meet certification standards | UL9540, UN3536 |
2.6. Appearance Description
Table 2-2 System appearance description
NO | Name | Description |
1 | Modular PCS | AC/DC converter module, each module is 200kW, the system is equipped with 6 groups of modules. |
2 | Battery rock | The battery string contains a battery PACK and the BMU, which are connected in series and output by a pair of positive and negative polarizers. |
3 | Industrial air conditioning | It is the main heat dissipation device in the battery room. It can adjust the indoor temperature and humidity and provide heating function in the extremely low temperature environment. |
4 | Exhaust equipment | When combustible gas exceeds the concentration threshold, open the fans and blinds to accelerate the air flow in the container, and use it with the air intake equipment to form a complete air exchange system |
5 | Containers share the ground point | Containers share the ground point |
6 | Pressure relief valve | When the internal pressure reaches the pressure threshold, will be opened to discharge excess pressure inside the container |
7 | Air inlet window | When combustible gas exceeds the concentration threshold, open the fans and blinds to accelerate the air flow in the container, and use it with the air intake equipment to form a complete air exchange system |
8 | Running indicator light | The system running status is Ready, RUN, or Fault |
9 | Alarm bell and bleed inductor light | Fire alarm bell and extinguishing agent release indicator light |
10 | Emergency stop button, fire manual/automatic switch box and fire bleed stop button | Emergency Stop button: Press this button in case of emergency, and the system will stop. Fire manual/automatic switch box: can switch fire control to manual mode. Fire bleed stop button: Fire is triggered by other reasons other than container fire |
2.7. System layout
The system is divided into three areas: battery room, electrical room and PCS room.
Figure 2-4 System layout
Table 2-3 System layout description
NO | Name | Description |
1 | PCS room | It mainly includes modular PCS |
2 | Electrical room | It mainly includes GPC controller, distribution box, auxiliary transformer, high voltage unit, fire control controller, fire cylinder, etc |
3 | Battery room | Mainly contains lithium iron phosphate battery string, air conditioning, ventilation system |
2.7.1. Battery room
SFigure 2-5 battery room layout
Table 2-4 Battery room component description
NO | Name | Picture | Description |
1 | Smoke sensor |
| Fire smoke sensor |
2 | Lighting |
| Battery room lighting device |
3 | Lighting switch |
| Battery room lighting device lighting switch |
4 | Temperature sensor |
| Fire temperature sensor |
5 | Hydrogen sensor |
| H2 detection unit |
6 | Exhaust fan |
| Ventilation system exhaust device |
7 | Precision air conditioner |
| 5kW precision air conditioner |
8 | Ventilation system control module |
| Ventilation system exhaust device control unit |
9 | Temperatur and humidity |
| System environment temperature and humidity detection unit |
10 | Ground block |
| The system shares the ground block |
2.7.2. Electrical Room
Figure 2-6 Electrical room layout
Table 2-5 Electrical room components
NO | Name | Picture | Description |
1 | Data box |
| System equipment parts with the information |
2 | GPC box |
| System GPC controller, including the running logic control, HMI, etc |
3 | Lighting equipment |
| Lighting equipment for electrical room |
4 | Travel switch |
| Electrical room lighting switch |
5 | Acousto-optic alarm |
| Fire alarm |
6 | Alarm bell |
| Alarm bell |
7 | Gas release indicator |
| Fire extinguishing agent release light |
8 | Fire gas release emergency stop button |
| Fire extinguishing agent release emergency stop button |
9 | Manual fire gas release device |
| The fire extinguishing agent manual release device of the fire fighting system, pull down the manual release handle, and the fire fighting system will release the fire extinguishing agent, which is not allowed to be used in non emergency situations. |
10 | Fire gas release disable switch |
| Fire agent release disable switch |
11 | Container emergency stop button |
| Fire control system controller |
12 | Fire control system controller |
| Fire control system controller |
13 | Distribution box |
| BESS system distribution box |
14 | Auxiliary transformer |
| BESS system auxiliary transformer (690V/400V, power supply for internal equipment) |
2.7.3. PCS room
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Figure 2-7 PCS room layout
Table 2-6 PCS room components
NO | Name | Picture | Description | Remarks |
|---|---|---|---|---|
1 | Modular PCS |
| 1# Modular PCS system | Hidden in the figure |
2 | 2# Modular PCS system | Hidden in the figure | ||
3 | 3# Modular PCS system | As shown in the picture above | ||
4 | 4# Modular PCS system | As shown in the picture above | ||
5 | 5# Modular PCS system | As shown in the picture above | ||
6 | 6# Modular PCS system | As shown in the picture above |
2.8. Primary schematic diagram
Figure 2-8 is a primary circuit diagram of the 20C2H1200K. After the battery energy is Inverted by PCS , it supplies power to users through transformer. Detailed wiring drawings can be referred to the device drawing section of the Device Drawing file. The symbols are interpreted in Table 2-7 .
Figure 2-8 Primary schematic diagram Table 2-7 Symbol Interpretation:
Symbol | Explain |
BP | Battery pack |
QF6 | Battery string DC circuit breaker |
FU6 | Battery string DC fuse |
KM6 | Battery string DC contactor |
CT0 | Current transformer |
DC/AC | Modular power conversion system EH-0200-HA-M |
QFBK | AC power switch of control transformer |
T | Control transformer(690V/400V) |
Transformer | Transformer (Not included in the container, which needs to be configured separately by the user) |
S407-24P16 | Serial number of battery string |
L1 | System AC output busbar L1 |
L2 | System AC output busbar L2 |
L3 | System AC output busbar L3 |