Views: 0 Author: Site Editor Publish Time: 2025-12-31 Origin: Site
In a battery rack liquid cooling circuit, a water or water–glycol mixture circulates through cold plates or cooling channels integrated within the battery modules. The coolant absorbs heat generated during charging and discharging cycles and then flows to a dry cooler, where the heat is transferred to ambient air through finned coils and axial fans.
This closed-loop system ensures:
Stable battery operating temperatures
Uniform temperature distribution across racks
Electrical isolation and leak-free operation
Dry coolers help maintain battery temperatures within the optimal range, minimizing thermal gradients that can accelerate cell degradation.
Unlike evaporative cooling systems, dry coolers operate in 100% dry mode, eliminating water usage, scaling, and biological growth risks.
With simple mechanical components and robust design, dry coolers are well suited for unattended and remote BESS sites.
Dry coolers can be easily matched to rack-based cooling loops, supporting modular expansion as BESS capacity grows.
Designed for use with glycol mixtures, dry coolers ensure safe operation in both high-ambient and sub-zero environments.
Cooling medium: Water / water–glycol
Circuit type: Closed-loop liquid cooling
Dry cooler coils: Finned tube heat exchangers
Fans: EC axial fans with variable speed control
Control interface: Integrated with BMS / EMS
Installation: Outdoor, container roof, or ground-mounted
Optional features include N+1 fan redundancy, low-noise fan packages, and corrosion-resistant coil coatings.
Dry coolers supporting battery rack liquid cooling circuits are commonly used in:
Containerized lithium-ion battery systems
Utility-scale grid energy storage plants
Renewable energy + storage projects
Fast EV charging stations with on-site storage
Data center and telecom battery backup systems
When selecting a dry cooler for battery rack cooling circuits, key parameters include:
Total heat rejection per rack and per container
Supply and return coolant temperatures
Maximum ambient air temperature
Flow rate and pressure drop limitations
Redundancy and uptime requirements
Noise and environmental constraints
Proper sizing ensures stable operation even during peak charging and discharging cycles.
Enhanced battery safety and thermal stability
Extended battery life and reduced degradation rates
Lower operational and maintenance costs
Simplified system architecture
Compliance with sustainability and water conservation goals
Dry coolers used in battery rack liquid cooling circuits are a critical component of modern BESS thermal management strategies. By delivering efficient, water-free heat rejection with high reliability, dry coolers help maintain optimal battery temperatures, protect system assets, and support long-term energy storage performance.
