20C1600K Datasheet

20C1600K-DST-01_V3

Datasheet for 20C1600K BESS container

1. Product specifications

1.1. BESS container overview

Each BESS 20C1600K is assembled in one 20 feet container

1.2. BESS container architecture

The BESS container has a modular architecture with:

- Liquid cooled battery packs made with LFP cells and a Battery Management Unit (BMU).

- Battery strings with a String Controller (CMU).

- Separate AC/DC Inverters (PCS) for each battery string.

- Liquid temperature control system and HVAC dehumidifier.

- Firefighting system, auxiliary power.

- BESS controller (GPC) to handle safety, automatic operation and data and control communication with external BESS and EMS SCADA.

The 20C1600K system uses a customized container with a stronger load-bearing case and reinforcement steel frames in the middle while maintaining the same dimensions as a 20ft HC container. Anti-corrosion materials are used for the paint of the container shell to improve the anti-corrosion performance of the container.

The shell interlayer is installed with 50mm thermal insulation rock wool to improve the thermal insulation performance of the system.

In the battery compartment, there are battery Strings, liquid cooling unit, air conditioners for dehumidification and cable slots, etc. Battery Strings are installed on both sides of the battery container, lighting, thermal sensors, smoke sensors, firefighting pipe and other equipment are installed above the side aisle.

In the electrical compartment, there are PCS, GPC, Firefighting Control System, power distribution system ，air conditioner and auxiliary power supply.

1.3. System Architecture

1.4. System Main Technical Specifications

AC Side

DC Side

BESS General

1.5. BESS Container Key features

• 314 Ah LFP cells from one of the world’s largest suppliers of LFP cells for ESS. Rated for 10,000 full cycles at 70% of initial capacity at 0.5P 25°C.

• AC/DC all-in-one integrated design in one 20’ container, 1500Vdc platform

• High efficiency string PCS.

• Active balancing BMS, Pack and rack level optimization design.

• Compact design, one 20’ container provides more energy but smaller size to save space.

• 100% pre-installed, plug-play upon delivery.

• FAT and commissioning done before shipping.

• <31T total weight allows most kind of transportations and liftings.

• 690Vac output ready to connect grid through additional step-up transformer.

• C5M corrosion classification as per ISO12944 for use in harsh weather and coastal areas

1.6. Main Components List

Battery System

Electrical Control and Distribution System

Container and Auxiliary System

Power Conversion System

1.7. Operating Environment

• Maximum Operating temperature: -35～+45℃;

• Storage temperature: -30～+55℃ (Short-term storage: 1 month), 0℃~35℃ (long-term storage: 1 year)

• Relative humidity: No more than 95%, non-condensing;

• No explosive media shall be allowed in the place of use;

• No strong acid or alkali and other highly polluting substances that can be adhered to or inhaled by the equipment shall be allowed in the place of use;

• The container must be horizontally installed on a hardened foundation, with cable slots on the ground for easy routing;

• Do not install the equipment in low-lying areas to avoid flooding;

• The container must be placed in a well-ventilated area. No obstacles are allowed within 300mm of the air inlet and outlet.

• The area around the equipment should be protected according to local requirements to prevent non-professional personnel access.

• Lightning protection measures should be placed around the equipment according to local or international standards and lightning protection requirements of the building or power plant equipment.

1.8. Electromagnetic Characteristics

1.9. Main Circuit Diagram

The system topology is shown in the figure below: (The gray dotted box is the standard supply scope of SUPPLIER)

Figure 1-2 System Main Circuit Diagram

Figure 1-3 Electrical Schematic Diagram

1.10. Certifications

The 20C1600K is fully certified according to UL and CE latest safety standards and thermal runaway tested as per UL9540A:

• UL9540 certified

• UL9540A thermal runaway tested

• UL1973 certified

• IEC 62619 certified

• CE-LVD and CE-EMC

• UL1741, IEC 62477, EN 50549-1&-2, LVD for PCS

• UN38.3, UN3536, etc.

• Fingrid SJV2019 certified by TUV for PCS

2.Subsystems

2.1. Lithium Iron Phosphate Battery Specifications

2.2. Battery Pack Integration

In the 20C1600K system, each battery pack contains 48 battery cells - the smallest unit in the battery system. The battery pack is standardized, easy to install and maintain, and features high energy density, consistency, reliability, and stability. The battery pack is designed with independent liquid cooling ducts inside, which provides good heat dissipation. The battery management unit (BMU), voltage sensors, and thermal sensors are also integrated in the pack to ensure the cells' stable performance.

• BMU on-board, Active balance also

• Liquid cooling

• Multi-communication

• UL9540A tested

Battery Pack Specifications:

LP47 Battery Pack

2.3. Battery string Integration

The battery string consists of 8 battery packs connected in series and mounted on 1 battery rack. The String is designed with battery module slots, CMU, DC power distribution space, fans and air ducts.

Each battery pack is equipped with a battery monitoring unit (BMU). The 8 BMUs are connected to the battery string management system (CMU) through CANBUS. The CMU manages the battery string and control the String's DC contactor. The CMU uploads battery information and DC switch status to the dispatch control terminal via Ethernet and receives control commands from the GPC.

• Comprehensive monitoring of battery operating status

• Reliable charge and discharge

• Built-in multi-level protection

• Modular design with high scalability

• Full metal frame

• UL9540A tested

• UL1973/IEC62619 certificated

Battery string Specifications:

2.4. Battery System Integration

The whole battery system comprises 8 battery strings connected. Each String's DC power distribution and battery management system are also integrated inside the cabinet and are modularly designed to be easy to install and maintain. The total capacity of the battery system is 3,008kWh.

Specifications are shown as below:

2.5. Power Conversion System (PCS)

The energy storage bidirectional power conversion system enables the bidirectional energy conversion between batteries and the grid AC power. Its core part is an inverter composed of power electronic components with embedded control software.

• Three-level topology, up to 99% conversion efficiency, better power quality

• Integrated cluster-level battery management function, high battery availability

• Intelligent multi-stage fan speed regulation, wide temperature operation capacity, 50 °C no derating

• Support constant power, constant current, constant voltage control, with a frequency modulation, VSG, and other functions

• Support IEC61850 protocol, with MS-level responsiveness

• IP66 protection, outdoor can be installed vertically and horizontally

Main specifications are shown as below：

3. Battery Management System (BMS)

The battery management System BMS is composed of Battery Module management unit BMU and battery string management unit CMU which is connected to the BESS Controller.

BMS system has the functions of high-precision detection and reporting of analog signals, fault alarm, upload and storage, battery protection, parameter setting, passive equalization, Battery Module SOC calibration and information interaction with other equipment. Main features of battery management system.

• Carry out comprehensive detection of battery operation status, including voltage, current, temperature, etc.;

• High accuracy of single battery voltage detection: ± 5mv, ensuring the reliability of system data analysis;

• Multi point temperature monitoring to avoid battery thermal runaway and ensure system safety;

• Passive equalization mode, effectively delaying battery life;

• Modular design, strong scalability;

• Complete and reliable battery protection function;

3.1. BMS Specifications

The technical specifications of BMU and CMU are shown in the table below:

BMU

CMU

GPC

3.2. BESS Controller

Grid Point Controller

The GPC is the BESS system core to realize the whole system Comprehensive logical control, operation model switch control, DC incoming control, blocking, protection and data communication and exchange.

All-around signal collection:

• State-of-charge and fault signal of each Battery String; PCS fault signal; system emergency stop signal; AC & DC circuit breaker position signal; DC contactor position signal; air conditioning operation signal; gas fire extinguishing system alarm signal;

• Total DC current and voltage, DC current and voltage of each Battery String, grid access point active power, demand power, and container ambient temperature signal;

Intelligent Communication:

• PCS, BMS, air conditioning, fire protection, third-party platform.

Comprehensive logical control:

• Monitor the DC voltage level difference between Battery Strings, and block the DC busbar connection to avoid circulating current due to large voltage difference;

• Monitor battery temperature and container ambient temperature, automatically start fan and air conditioner in battery cabinet to meet the battery working environment requirements;

• Adaptive adjustment of the charge/discharge power of the PCS;

• Automatically disconnect the fault Battery String, without affecting the charging and discharging of other racks;

Multiple protection includes:

• Overload protection in charging: monitor the transformer load status at the grid access point busbar in charging, and adjust the charging power or stop charging when overloading;

• Reverse power protection in discharging: monitor the transformer load status at the grid access point busbar in discharging and adjust the discharging power or stop discharging when there’s reverse power.

Human machine interaction:

• 10-inch touch screen providing comprehensive monitoring of BESS status,

• Real-time data query, alarm event query,

• Parameter values setting, and operating strategy query.

Multiple interfaces:

• RS485 interface for connection to SCADA control servers or third-party platforms.

• Support for ModBus TCP/IP and IEC8150 GOOSE communication for rapid grid switching.

• Optional 4G and satellite IP communication gateway for critical communications backup.