Thermal management solutions for battery energy storages (BESS)

Unlocking the Power of Renewable Energy
with Customized cooling and Efficiency

In the rapidly evolving landscape of battery energy storage, Lumikko stands at the forefront of developing and deploying robust thermal management systems for Battery Energy Storage Systems (BESS). These systems are crucial for stabilizing the electric grid and integrating renewable energy sources, thus playing a vital role in the shift towards more sustainable energy practices.

Temperature regulation

Why thermal management matters in Battery Energy Storage Systems

Optimal thermal management is critical in maintaining battery efficiency and longevity. Battery cells, irrespective of their chemistry are sensitive to temperature fluctuations. Different battery chemistries have varying ideal operational temperature ranges, which are critical to maintain for efficiency and longevity. Temperatures above or below this range can dramatically reduce battery life and efficiency. For instance, at 30°C, a lithium-ion battery’s life expectancy reduces by 20%, and at 40°C, the degradation accelerates, cutting the lifespan by up to 40%. Our cooling systems are designed to be adaptable, providing optimal thermal management for a wide range of battery chemistries including but not limited to lithium-ion, lead-acid, and solid-state batteries

Cooling solutions

To address the heat generated during high-intensity operations such as rapid charging or discharging, Lumikko offers sophisticated cooling systems tailored to the needs of BESS (Battery Energy Storage Systems). High C-rate applications, which involve fast energy transfer rates, are particularly susceptible to overheating. In these scenarios, liquid cooling systems are preferred due to their efficiency in dissipating large amounts of heat and maintaining uniform temperatures across the battery pack. These systems can prevent thermal hotspots and mitigate the risk of thermal runaway, ensuring safety and performance under high load conditions .

For less intense applications, air-cooling systems may suffice. These systems are advantageous for their lower cost and simplicity. They work effectively by isolating the internal environment from external conditions, recirculating cooled air within the enclosure, and are particularly suited for environments where ambient temperatures are consistently below the desired internal temperature.

Warming Solutions

In colder climates, maintaining a minimum operational temperature is crucial to prevent the battery’s efficiency from dropping due to sluggish ion transport within the electrolyte. Lumikko’s thermal management systems include internal heaters that help preserve battery life by maintaining a stable temperature, even in the winter months.


for needs

At Lumikko, we don’t believe in one-size-fits-all solutions. Our team of experts collaborates closely with clients to understand their unique requirements. Whether it’s optimizing cooling for various battery chemistries or ensuring energy storage reliability, we tailor our designs to fit specific applications. As battery technology evolves, so do our thermal management solutions. We continuously adapt our systems to handle the latest advancements in battery chemistries, ensuring top performance and extended lifespans regardless of the specific technology employed

Integration and Customization

Each BESS installation has unique requirements based on its location, scale, and the specific energy storage technology employed. Lumikko specializes in providing customized solutions that include both modular and compact units, which can be scaled and adapted to different configurations. These solutions not only meet the technical requirements of each project but also comply with global standards, ensuring reliability and efficiency across all operation.


As a leader in thermal management solutions, Lumikko Oy is dedicated to enhancing the performance, safety, and lifespan of BESS installations worldwide. By continuously advancing our technology to meet the diverse and evolving needs of the energy sector, we ensure that our clients can leverage the full potential of their energy storage systems, contributing to a more sustainable and efficient energy future.

Thermal Management of BESS Power Electronics

In addition to battery cells, power electronics such as inverters, converters, and chargers are integral components of Battery Energy Storage Systems (BESS) that also require effective thermal management. These components are responsible for the efficient conversion and flow of electrical energy, which inherently generates heat during operation.

Challenges in Power Electronics Cooling

The heat generated by power electronics can significantly impact their performance and durability. Excessive heat can lead to thermal stress, reduced efficiency, and premature aging of components. Therefore, it’s essential to manage the temperature of these devices to maintain system reliability and efficiency. The optimal operating temperature for power electronics typically ranges between 25°C and 45°C; exceeding these limits can result in decreased performance and potential failure.

Thermal Management Solutions

Lumikko Oy addresses these challenges by incorporating advanced cooling technologies specifically designed for power electronics within BESS. One effective solution is the use of liquid cooling systems, which are particularly adept at handling the higher heat flux generated by power electronics. These systems utilize coolants that directly absorb heat from the components before being cycled away to a heat exchanger, thus maintaining a controlled temperature environment.

For applications where space and complexity need to be minimized, air cooling might be employed. This method involves using ambient air or forced air systems to dissipate heat. While not as efficient as liquid cooling in high-power scenarios, air cooling offers a simpler and more cost-effective solution for lower power applications.

Innovative Approaches and Customization

Lumikko’s engineering team also explores innovative approaches such as heat pipes and phase change materials for more passive cooling options. These technologies are advantageous in scenarios where noise reduction and energy efficiency are prioritized.

Each solution from Lumikko is tailored to the specific needs of the installation, taking into account the environmental conditions and operational demands. This customization ensures that the thermal management system not only protects the power electronics but also optimizes the overall efficiency and longevity of the BESS.


Ensuring System Longevity and Efficiency

By integrating these sophisticated thermal management solutions, Lumikko Oy ensures that both the batteries and power electronics in BESS operate within their ideal temperature ranges, enhancing system efficiency and longevity. This approach is critical for the success of energy storage systems, particularly as the demand for renewable energy solutions continues to grow.

With Lumikko’s expertly designed systems, clients can expect a reliable and durable BESS setup that supports the continuous, efficient, and safe operation of power electronics, even under the most demanding conditions.

Do you want to discuss about thermal management solutions for your need? Give us a message.

Enhancing Battery Performance

All-Weather Perfomance

Energy storage systems face extreme conditions—whether it’s scorching summers or freezing winters. Lumikko Oy’s thermal management solutions optimize battery performance across the spectrum. Our designs maintain optimal operating temperatures, ensuring consistent output even in challenging environments.

Prolonging Battery Lifespan

Heat is the enemy of battery longevity. Our cooling systems dissipate excess heat, preventing premature degradation. Longer battery life means fewer replacements, reducing waste and conserving resources.


Energy Transition and Sustainability

Our solutions align seamlessly with global efforts to combat climate change. By enabling the use of renewable energy technologies, we contribute to reducing greenhouse gas emissions. Lumikko Oy’s thermal management systems play a crucial role in decarbonizing power systems and promoting a cleaner energy landscape.

Life Cycle Assessment (LCA)

We take a holistic approach to sustainability. Our products undergo rigorous life cycle assessments (LCAs) to evaluate their environmental impact from production to end-of-life. By adhering to best practices in LCA, we ensure transparency, comparability, and informed decision-making.


Environmental Stewardship

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