20C2500K BESS container
description: 20C2500K-INF-01-V1-Brochure for 20C2500K BESS containerArchitecture #h_6796ab5534#h_6796ab5534
The 20C2500K BESS container has modular architecture with:
- Liquid cooled battery packs made with LFP cells and a Battery Management Unit (BMU).
- Battery cluster / strings with a Controller (CMU).
- Separate AC/DC Inverters (PCS) for each battery string.
- Liquid temperature control system and HVAC dehumidifier.
- Firefighting system, backup power.
- BESS controller (GPC) to handle safety, automatic operation and data and control communication with external BESS and EMS SCADA
Container description #h_687572a075#h_687572a075
The 20C2500K 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, BESS controller with 24h back up power, air conditioner and auxiliary power supply distribution system.
Independent string inverters #h_ca29cefa31#h_ca29cefa31
We use independent string inverters. Independent string inverters provide better capacity protection compared to central inverters. By comparison, with central inverters, over time, charge and discharge performance of parallel battery racks will vary due to divergences in the internal resistance of the cells.
Tests have shown that capacity loss increases by up to 2 % per year when eight racks are connected in parallel with a central inverter compared to non-parallel connections with independent inverters. Batteries connected in parallel can also lead to current loops and barrel effects due to voltage differences, resulting in a reduction in the usable capacity of the system.
Tests data also show that when two battery racks are connected in parallel to a central inverter, and the SOC differs by 8%, after a complete charge-discharge cycle, the total discharge capacity of the energy storage system with independent PCS inverters (ACDC or DCDC) is increased by up to 7%. So independent string inverters offer the best long term performance.
Specifications #h_84aa093101#h_84aa093101
AC side #h_7b338de3da#h_7b338de3da
Nominal capacity | 2,580kW/5,015kWh |
|---|---|
Rated AC output power | 2,580kW |
Max. AC output power | 2,838kVA |
Rated output voltage | 690V |
Output voltage range | 586.5~759Vac (Optional) |
Rated frequency | 50/60Hz |
Rated output current | 2,158Aac |
Adjustable power factor | 0.1~1 leading or lagging (Controllable) |
THDi | <1.5% (at rated power) |
Max efficiency | 98.7% |
Output wiring | 3 phase 3 wire |
DC side
Rated voltage | 1,331.2Vdc |
|---|---|
Lower voltage limit | 1,164.8Vdc |
Upper voltage limit | 1,476.8Vdc |
Rated current | 2,158A |
Battery cell capacity | 314Ah |
Total number of cells | 4,992 |
Cells per battery module | 52 in series |
Battery modules per string | 8 in series |
Strings per container | 12 in parallel |
Actual capacity | 5,015 kWh |
General #h_83d40c8a54#h_83d40c8a54
BESS Container dimensions | W6,058xD2,438xH2,896mm |
|---|---|
BESS weight | < 42.3T |
IP protection | IP54 |
Operating temperature range | Normal: -35~45℃ |
Relative humidity | 0~95% (non-condensing) |
Max working altitude | 2,000m/6,562ft |
BESS cooling | Liquid cooling & air conditioner |
Control system communication | Modbus TCP |
Certifications | UL9540, IEC62619, EN 50549-2, IEC 61000-2&-4, IEC 62477, UL 1973, EN50549-2, IEEE 1547, FCC, UN3536 |
BESS capacity over project life #h_28698bd994#h_28698bd994
The evaluation point is on MV transformer POC output point, considering the auxiliary electrical loss and internal consumption.
Cells are rated to 10,000 full cycles (0.5P 25°C 100% DOD) to > 70% of initial capacity. In normal operating conditions, BESS is rated at 10,000 full cycles over 12 to 15 years to > 70% of initial capacity (see below degradation curves).
Most likely scenario:
1 full cycle per day or about 365 full cycles per year over 15 years at 0.5P rate.
High usage scenario:
up to 2 full cycles per day (about 730 full cycles per year) over 15 years at 0.5P rate.
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Certifications #h_234c464010#h_234c464010
The 20C2500K and its active components are fully certified according to UL and CE latest safety standards and thermal runaway tested as per UL9540A:
- UL9540A thermal runaway certified.
- 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 SJV2024 certified by TUV for PCS.