Grid Scale Battery Storage System

3.2MWh Containerized Battery Energy Storage System (BESS)

Technical Product Specification & Engineering Overview

Our containerized Grid-Scale Battery Energy Storage System is engineered for utility-scale power networks, renewable energy integration (Solar/Wind), and industrial peak load management. Built within a standardized 20-foot ISO high-cube container, the system integrates high-density lithium iron phosphate (LiFePO4) battery racks, a multi-tier Battery Management System (BMS), an integrated Power Conversion System (PCS), liquid-cooled thermal management, and an NFPA-compliant aerosol/gas fire suppression system.

Designed for modular expansion, multiple units can be deployed in parallel to scale from megawatt-hour (MWh) to gigawatt-hour (GWh) capacities, providing fast-response frequency regulation, voltage support, and energy shifting.

High-Performance LiFePO4 Cell Technology
The system utilizes automotive-grade or heavy-duty stationary-grade LiFePO4 prismatic cells. This chemistry is selected due to its crystalline structure stability under frequent high-rate cycling, minimizing thermal runaway risks compared to ternary lithium alternatives.

Thermal Stability: Cell thermal runaway threshold temperature exceeds 200°C.

Efficiency: Round-trip efficiency (RTE) >= 88% at the system level (including PCS losses).

Multi-Tier Battery Management System (BMS)
To prevent overcharging, over-discharging, and cell imbalance, the system operates on a decentralized, three-tier master-slave BMS architecture:
Slave BMS (Pack/Module Level): Continuously monitors individual cell voltages, module temperatures, and balances active currents.

Master BMS (Rack Level): Aggregates rack data, calculates real-time State of Charge (SOC) and State of Health (SOH), and interfaces directly with the PCS.

Central BMS (System Level): Coordinates overall container safety interlocks, insulation monitoring, and communicates operational parameters to the Energy Management System (EMS).

Liquid-Cooling Thermal Management
Unlike conventional forced-air systems that suffer from internal temperature gradients, our liquid-cooling solution uses a glycol-water mixture circulated through cooling plates between cells.

Temperature Uniformity: Maintains cell temperature variance within +/- 2°C across the entire rack.

Parasitic Loss Reduction: Intelligent variable-speed pumps and chillers reduce auxiliary power consumption, maximizing net project yield.

Comprehensive Fire Safety Design
To meet strict utility compliance requirements, safety is partitioned into four distinct defense layers:
Cell Level: Aerogel insulation barriers between cells to prevent thermal propagation.

Module Level: Built-in pressure relief valves and off-gas detection sensors.

Container Level: Integrated Aerosol or Novec 1230 clean-agent fire suppression system coupled with combustible gas detectors (H2, CO).

Structural Level: Fire-rated partition walls separating the battery compartment from the electrical/PCS compartment.

Renewable Energy Integration (Solar & Wind): Absorbs excess generation during high-output/low-demand hours, mitigating curtailment and smoothing out ramp rates to meet grid interconnection codes.

Ancillary Services & Grid Stabilization: Delivers sub-second response times for primary frequency response, spinning reserve substitution, and dynamic voltage regulation.

Industrial & Commercial Microgrids: Deployed at heavy manufacturing plants or data centers for peak shaving (reducing demand charges) and seamless uninterrupted backup during utility outages.

Every containerized system undergoes rigorous factory acceptance testing (FAT) prior to dispatch:

Electrical Integrity: High-potential (Hi-Pot) insulation testing and busbar torque verification.

BMS Functionality: Simulated fault injection tests for over-voltage, short-circuit, and communication loss.

Thermal & Performance: Full-load thermal cycling and capacity calibration tests in climate-controlled chambers.