latest company case about Wespc (Dongguan) Tech Co., Ltd. Certifications

With the rapid development of China’s new energy industry and accelerated energy transition, commercial and industrial power users at charging stations face growing challenges:  1.Surging electricity demand driven by charging station expansion strains existing distribution infrastructure; 

2.Traditional transformer capacity upgrades suffer from high investment costs, lengthy approval cycles, and increased base electricity fees.

Against this backdrop, an integrated “Liquid-Cooled ESS + Smart Charging” solution based on dynamic capacity expansion has emerged. By deploying five 215kWh liquid-cooled energy storage cabinets (total capacity: 1,075kWh) in parallel on the low-voltage side (400V) of the transformer, an elastic power expansion system is established. It not only resolves transformer overload issues but also generates continuous revenue through peak-valley arbitrage, offering an innovative energy management model for high-load charging scenarios.

The project’s innovation lies in its high-performance liquid-cooled ESS technology, featuring:  

Modular Design: Five 215kWh cabinets (total capacity: 1,075kWh; total output: 625kW) enable flexible power allocation via intelligent parallel control.  

Liquid Cooling Advantages: ±5°C temperature differential control (vs. air cooling), extending cycle life and boosting energy density (footprint: 1.6 sq.m/cabinet).  

Multi-Layer Safety: Integrated perfluorohexanone fire suppression, tertiary BMS, and real-time environmental monitoring (temperature/smoke/gas).  

Wide-Temperature Operation: Stable performance across -20°C to 50°C environments.

The ESS connects via a dual-circuit design: The main circuit links to transformer’s low-voltage bus for charge/discharge. The control circuit integrates with smart EMS for real-time dispatch. The ESS will automatically charge when transformer load is less than threshold during off-peak periods. It will instantly respond and discharge when load exceeds limits, enabling “elastic capacity expansion”.

An additional advantage of this system is inter-temporal energy transfer: By charging during nighttime off-peak periods (¥0.37/kWh) and discharging during daytime peak hours (¥1.10/kWh), it not only achieves dynamic power capacity expansion but also generates significant revenue through price spread arbitrage. Operational data demonstrates that in peak load shifting mode (charging: 00:00-07:00; discharging: 16:00-24:00), the system achieves 85% daily cycle depth.