Battery Energy Storage Systems (BESS) are becoming essential for renewable energy plants, EV charging infrastructure, industrial facilities, and utility grids. However, internal heat is a challenge that remains constant as lithium-ion battery technology advances.
Every charging and discharging cycle generates heat. If left unmanaged, it can reduce battery performance, shorten service life, and increase safety risks. That is why thermal management has become a critical part of modern BESS design.
Industrial cooling systems, particularly air-cooled scroll chillers, help maintain stable operating temperatures. These units ensure long-term efficiency, safety, and reliable performance of BESS.
Battery Energy Storage Systems (BESS) are becoming essential for renewable energy plants, EV charging infrastructure, industrial facilities, and utility grids.
Every charging and discharging cycle generates heat. If left unmanaged, it can reduce battery performance, shorten service life, and increase safety risks
Industrial cooling systems, particularly air-cooled scroll chillers, help maintain stable operating temperatures.
Tempcon’s Advanced Industrial Cooling Reinforces India’s Iron and Steel Industry
Reasons Why Battery Thermal Management Is Critical
Here are the reasons why thermal management is essential for BESS.
Batteries Generate Heat During Every Charge and Discharge
Lithium-ion batteries naturally produce heat during normal operation. Heat generation increases under:
- Charging
- Discharging
- High current loads
- Fast charging
- Continuous charge-discharge cycles
- High ambient temperatures
Without proper cooling, this heat quickly accumulates inside battery enclosures. Over time, excessive temperatures affect battery chemistry and reduce the overall reliability of the energy storage system.
Temperature Differences Between Cells Matter
Even small temperature differences can cause uneven charging and discharging. Such differences force the battery management system (BMS) to work harder.
This leads to faster ageing of certain cells and reduced performance. The lifespan of the entire battery pack takes a hit. Uniform cooling helps every cell operate under similar conditions, improving overall system reliability.
What Happens When a Battery Storage System Overheats?
Excessive heat adversely affects both battery performance and the BESS infrastructure as a whole
- Accelerates battery degradation
- Causes gradual capacity loss
- Reduces charging efficiency
- Increases internal resistance
- Creates uneven cell ageing
- Raises maintenance requirements
- Damages power electronics and control systems
- Increases the risk of thermal runaway
- Lowers overall return on investment (ROI)
Heat is the single biggest factor that shortens battery life.
| Without Proper Cooling | With Industrial Cooling |
|---|---|
| Higher battery temperature | Stable operating temperature |
| Faster battery ageing | Longer battery life |
| Uneven cell temperatures | Uniform thermal distribution |
| Frequent maintenance | Lower maintenance needs |
| Reduced efficiency | Improved energy efficiency |
| Increased downtime | Reliable 24×7 operation |
Components Inside a BESS That Need Cooling
Cooling in a BESS extends well beyond the battery cells. Several critical components rely on stable temperatures for reliable operation.
- Battery Modules – Prevent overheating, improve battery life, and maintain performance.
- Battery Management System (BMS) – Protects sensitive monitoring and balancing electronics.
- Inverters – Remove heat generated during DC-to-AC power conversion.
- Power Conversion System (PCS) – Ensures efficient power transfer without overheating.
- PLC Panels – Maintain dependable automation and control functions.
- Power Electronics – Prevent thermal damage to switches, converters, and controllers.
- Communication Equipment – Supports uninterrupted monitoring and remote communication.
- Electrical Enclosures – Protect sensitive electrical components from excessive heat.
Protecting the entire system, not just the batteries, improves operational reliability and extends equipment life.
How Industrial Cooling Systems Improve BESS Performance
Industrial cooling systems reduce BESS hotspots that accelerate battery degradation. Stable enclosure conditions also improve the reliability of electronic components such as inverters, PLCs, and communication equipment.
Modern industrial cooling systems designed for BESS provide precise temperature control, continuous 24×7 operation, and reliable performance even in harsh outdoor environments.
Many systems use a closed-loop glycol-water circuit, maintain coolant temperatures within ±1°C, and support remote monitoring via industrial communication protocols to ensure dependable operation.
The result is better energy efficiency, lower maintenance costs, reduced downtime, and significantly longer battery life.
How to Select the Right Cooling System for Your BESS
Use the following checklist when evaluating a cooling solution:
- Cooling capacity suitable for battery size
- Battery technology compatibility
- Local ambient temperature conditions
- Enclosure size and airflow design
- IP-rated protection for outdoor installations
- High energy efficiency
- Redundancy requirements for critical applications
- Reliable service and technical support
- Easy maintenance access
- Future expansion capability
Select a cooling system that can accommodate future battery expansion instead of sizing it only for current capacity.
Why Air-Cooled Scroll Chillers Are an Excellent Choice for BESS
High Cooling Efficiency
Air-cooled scroll chillers continuously remove heat from battery enclosures using a closed-loop refrigeration cycle, ensuring reliable temperature control even during heavy operating loads.
Precise Temperature Control
Maintaining consistent battery temperatures is essential for performance. Modern industrial chillers can regulate coolant temperatures with an accuracy of ±1°C, helping minimise thermal stress on batteries.
Reliable 24×7 Operation
Battery storage systems often operate around the clock. Industrial chillers are designed for continuous duty, making them suitable for critical energy storage applications.
Low Maintenance
Scroll compressors contain fewer moving parts than many alternative compressor designs, reducing wear and lowering maintenance requirements.
Designed for High Ambient Temperatures
BESS installations are frequently located outdoors. Industrial air-cooled chillers can operate across wide ambient temperature ranges, making them suitable for demanding weather conditions.
Energy-Efficient Performance
Efficient refrigeration systems reduce overall energy consumption while maintaining optimal battery temperatures, improving system efficiency.
Easy Scalability
Air-cooled scroll chillers can be selected or expanded to match increasing battery storage capacity without major infrastructure changes.
How the Cooling Process Works
The scroll compressor circulates refrigerant through the system, where heat is absorbed through a plate heat exchanger. A glycol-water coolant carries heat away from the battery enclosure, while condenser fans reject it into the surrounding air. The cooled fluid then returns to the BESS, creating a continuous cooling cycle.
Suitable Applications
Industrial air-cooled scroll chillers are ideal for:
- Renewable energy plants
- Solar + Battery Storage
- Wind farms
- EV charging infrastructure
- Industrial energy storage
- Microgrids
- Utility-scale BESS
Tempcon designs industrial air-cooled scroll chiller solutions for reliable thermal management in demanding BESS applications.
Maximise Battery Life with Tempcon’s Reliable BESS Cooling Solutions
Tempcon’s industrial air-cooled scroll chillers provide dependable cooling that improves system reliability, extends battery lifespan, and supports continuous operation. Maximise the performance and longevity of your BESS by letting us provide accurate cooling solutions.
Contact us today for your BESS cooling requirements.
