Lithium energy storage system esGrid

lithium-ioncontainerizedhigh-capacity

Product overview
The esGrid utility-scale energy storage system uses lithium batteries, a cluster-control architecture and an all-in-one containerized design to perform functions such as smoothing renewable output fluctuations, frequency regulation, capacity leasing, load shifting and standby power supply, thereby improving grid stability.

Key highlights

• Cluster-controlled architecture: Prevents circulation currents between clusters, increasing available system capacity by ~15% and improving efficiency by ~2%.
• Standard container design for overseas transport: All-in-one layout with side-by-side mirror configuration reduces overall project footprint by ~30% compared with conventional solutions.
• 3D thermal management: Ensures cell-to-cell temperature difference ≤ 2°C, contributing to significantly extended cycle life.
• "4+1" safety concept: Cell-level insulation, pack liquid electrical isolation, cluster electrical isolation, physical segregation within the container and station-wide intelligent alarms to mitigate fire and safety risks.

Standards and certification
Complies with relevant IEC standards and international certifications, including IEC 62619, IEC 63056, IEC 62477, IEC 61000 and UL9540A.

Technical specifications

• Rated energy: >3 MWh
• Rated voltage: 690 V
• Rated frequency: 50/60 Hz
• Power factor / regulation range: >0.99 @ rated power / 0.8 leading ~ 0.8 lagging
• Voltage ratio: User-defined MV level / 0.69 kV
• Rated charge / discharge rate: 0.25C / 0.5C / 1C
• Operating temperature range: -30 ~ 50 °C (derating >45 °C)
• Operating humidity range: 0–100% RH, non-condensing
• Operating altitude: Max 5000 m (derating >4000 m)
• Thermal management system: Intelligent liquid cooling
• Container IP rating: IP54
• Communication protocols: Modbus, IEC 104, IEC 61850, etc.
• Dimensions (without transformer): 2 × 6058 (W) × 2438 (D) × 2896 (H) mm
• Operation modes: Frequency regulation, price arbitrage, peak shaving, energy market participation, etc.