What’s Inside a 125kW/261kWh Liquid-Cooled Outdoor Cabinet?

• Three-level four-bridge arm topology

• Fourth bridge arm dedicated to neutral line current, effectively addressing three-phase imbalance

• Ensures stable waveform in applications with uneven load distribution (e.g., factories with mixed equipment)

05 Liquid Cooling Unit

• Communicates with EMU via RS485, real-time coordination

• Cell temperature control range: 25±5°C

• Overall cabinet temperature difference ≤2.5°C – extends battery cycle life

06 Liquid Cooling Piping

• Thermal insulation, anti-condensation design

• Equipped with non-return valves and check valves to prevent backflow

• Uniform flow distribution to each battery cluster for consistent heat dissipation

07 Fire Protection – Two-Level Protection

• Level 1: Aerosol fire suppression device inside each battery pack

• Level 2: Perfluorohexanone fire suppression system for whole cabinet, plus smoke and temperature sensors

• Water firefighting interface reserved, rear pressure relief valve for thermal runaway gas venting

08 Dehumidifier

• Prevents condensation caused by large temperature swings between day and night

• Protects electrical components from moisture, short circuits, and corrosion – especially critical in humid climates

09 Water Immersion Sensor

• Installed at the lowest point of the cabinet

• Real-time monitoring of water or coolant leakage; triggers alarm in case of flooding or pipe leakage

10 Access Control System

• Password or key-based entry, only accessible to authorized personnel

• Prevents unauthorized operation and accidental contact with live parts

11 Structural Design

• Outdoor-grade anti-corrosion coated steel

• IP54 minimum protection rating – dust-proof and water-resistant

• Physically separated battery compartment and electrical compartment for safe maintenance

• Reinforced frame for transport, lifting, and seismic performance

• Fully integrated system with door seals, access control, pressure relief valve, immersion sensor, and dehumidifier