Driven by the global energy transition and the "dual carbon" strategy, the installed capacity of electrochemical energy storage in China has grown rapidly. According to relevant data statistics, by the end of 2024, the cumulative installed capacity of power energy storage in China's energy storage industry has exceeded the gigawatt mark, reaching 137GW. However, frequent safety accidents have become a pain point in the industry. According to relevant statistics, there will be over 80 fire accidents in global energy storage power stations in 2024, among which thermal runaway accounts for 75% of the main cause.

The traditional temperature control system for energy storage has significant drawbacks. The heat dissipation efficiency of air cooling is low, and the temperature difference between battery cells is generally between 5 and 8 degrees Celsius, which easily leads to the degradation of battery performance. Although liquid cooling can control the temperature difference within 2-3℃, it is difficult to prevent heat diffusion. In addition, the existing fire protection systems respond slowly. Most of them take more than 10 seconds from the trigger of thermal runaway to the activation of fire suppression, which easily leads to missing the best fire suppression opportunity and increasing the risk of explosion and fire.

Against this industry backdrop, Qualtech, with its outstanding technical strength and acute industry insight, has launched a thermal and dissipation integrated immersion liquid-cooled energy storage product, including immersion liquid-cooled series commercial and industrial storage/large-scale storage solutions, etc. This innovative solution precisely addresses the pain points of the industry and provides a brand-new solution for the safe and efficient development of the energy storage industry.

Thermal dissipation integrated immersion liquid cooling technology: Reconstructing the safety baseline of energy storage

The heat dissipation integrated immersion liquid cooling energy storage product of Qualtech adopts the immersion liquid cooling system with the highest safety at present. This system integrates cooling and heating, intelligent control, and fire safety. Through physical isolation and digital monitoring, it achieves all-round security guarantees. The energy storage cells are directly immersed in the coolant, completely isolated from air, moisture, etc., fundamentally eliminating the possibility of battery combustion and explosion. Even in the event of thermal runaway, it can prevent fire, explosion and smoke, greatly reducing safety risks.

In terms of performance, this product integrates the immersion temperature control system with the BMS management system, achieving precise temperature control and intelligent adjustment. With the help of optimized cooling technology, the temperature difference between the battery cells is strictly controlled within 1.5℃, and the top and bottom temperatures are ≤2℃. This effectively enhances the consistency of the operating temperature, not only helping to extend the available capacity and cycle life of the battery and reduce the operating cost of the energy storage system, but also supporting higher rate (> 1C) charging and discharging requirements, fully meeting the strict high-performance requirements of modern energy storage systems. In terms of thermal performance, at a 1C charge and discharge rate, the temperature difference of the PACK-level cells is less than 1.5℃, and the maximum temperature of the cells does not exceed 38℃, providing strong support for the consistency of the cells and the long-term stable operation of the system.

In addition, the product has significant application advantages and can adapt to harsh environments such as extremely cold, high temperature, high altitude, and strong wind and sand. It is suitable for scenarios with high safety requirements such as energy storage power stations, ships, mines, and data centers, and can provide reliable guarantees for energy storage and management in all industries. In terms of application scenarios, it also demonstrates wide applicability, covering thermal energy storage frequency regulation, new energy storage allocation, independent energy storage on the power side, large industrial and commercial parks, data centers /AI intelligent computing, photovoltaic storage charging stations and other scenarios. Whether it is the traditional energy field or emerging fields such as intelligent computing and new energy vehicle charging, it can provide high-quality energy storage and management solutions. Empower different industries.

Innovative system architecture: Efficient collaboration empowers all-scenario applications

The plan builds an efficient energy storage system through six core features.

1. Thermal fire integrated immersion PACK: Utilizing self-developed fluorinated liquid insulating fire-fighting liquid, it is 100% safe and reliable. The application of enhanced convection immersion technology has led to a reduction of up to 80% in liquid volume, ensuring safety while significantly lowering the system's cost.

2. Energy storage battery cells: Compatible with various battery cells such as 280Ah/314Ah, and supports customized configurations ranging from 1P48S to 60S, which can meet the needs of different customers.

3. Intelligent liquid cooling system: It adopts dual modes of pressure machine cooling and natural cooling, integrating an intelligent algorithm model. It features high cooling efficiency and significant energy-saving effects, with an energy-saving rate as high as 80%.

4. Battery Management System (BMS) : Adopting a 2+1 level architecture, it offers an integrated solution for intelligent data collection, analysis, and diagnosis, and collaborates with safety protection technologies to comprehensively ensure the safety and stability of the battery system.

5. Energy Storage PCS: High-performance modular energy storage PCS that integrate AC and DC power distribution, are plug-and-play, have high power conversion efficiency, and are easy to operate.

6. 4S Integrated Control: By integrating PCS, BMS, EMS and TMS, 4S control integration is achieved, enhancing the overall performance and collaborative efficiency of the system.

Three self-developed core technologies: Building a differentiated competitive barrier

Qualtech can achieve dual advantages in cost and performance through breakthroughs in underlying technologies:

1. Self-developed fluorinated liquid route: This fluorinated liquid not only has excellent insulation performance but also outstanding fire-fighting performance, providing a solid guarantee for the safe operation of energy storage systems.

2. High-efficiency liquid-cooled immersion Pack: The top of the immersion Pack is filled with liquid, which can preferentially cool local hot spots such as the tabs of the battery cells, optimizing the cooling efficiency. Meanwhile, by adopting the highly efficient enhanced convection cooling technology, the amount of coolant used has been reduced by 80%, significantly enhancing the cost advantage of the system.

3. Dual-mode immersion cooling unit: The design of the compressor and natural cooling system in coordination enables the liquid to support up to 30℃+ liquid inlet, increases the natural cooling time by 80%, reduces the refrigeration power consumption by 80%, and improves the system operation efficiency by 2%, making it highly competitive in the industry.

Full-stack self-developed capabilities: An intelligent closed loop from hardware to the cloud

The heat dissipation integrated immersion liquid-cooled energy storage products of Qualtech have significant advantages. The product has achieved a breakthrough in 4S + C full-stack self-research and development. From the construction of hardware infrastructure to the in-depth development of software systems, from the overall planning of the system to the precise control links, all have been repeatedly refined and optimized to comprehensively ensure the high performance and high reliability of the energy storage system, stably output power, and meet the energy storage needs of multiple scenarios.

Its independently developed EMS energy management system and cloud platform deeply integrate electrochemical dynamic detection technology and equation analysis method, and with the help of AI self-learning neural network technology and multi-dimensional modeling methods, achieve precise management of the entire life cycle of batteries, including initial state assessment, operation performance monitoring and service life prediction. Moreover, the platform has a powerful zero-code compatibility capability with peripheral systems, and can expand functions according to user needs and changes in application scenarios, adding impetus to intelligent management and operation and maintenance.

In addition, through the coordination of advanced AI prediction models and multi-level defense measures, the safety and reliability of energy storage systems have been significantly enhanced. In terms of safety monitoring, it can issue early warnings for abnormal temperatures, gas leaks and other situations, and give an alarm 5 to 30 minutes in advance. In emergency response, the liquid cooling/aerosol fire extinguishing system can be quickly activated to slow down the heat diffusion rate by at least 50%. It can also urgently isolate and cut off the electrical connection of the faulty module. Practical application data shows that it can reduce losses by more than 80%, building a solid safety line for the stable operation of the energy storage system.

Industry prospects: Immersion liquid cooling technology leads the TWh era

The energy storage industry is now standing at the threshold of the TWh era. Safety is no longer merely a technical indicator but also the ethical bottom line for the development of the industry. In the wave of green energy transformation driven by the "dual carbon" strategy, Gaotai Haoneng's thermal energy dissipation integrated immersion liquid-cooled energy storage products have emerged with advantages in safety performance, operational efficiency, technical design and application scenarios, laying a solid foundation for the safe and efficient operation of energy storage systems and contributing to the sustainable development of various industries.

In the crucial competition for global energy security, Chinese enterprises represented by Qualtech are redefining the next-generation energy storage safety standards through technological breakthroughs, continuously enhancing China's influence and say in the global energy storage field. The practice of Qualtech has powerfully demonstrated that by breaking the "impossible triangle" through underlying innovation, not only can the safety of every kilowatt-hour of green electricity be guaranteed, but also the civilized paradigm of energy utilization can be reshaped, contributing Chinese wisdom to the global energy transition. In the future, Qualtech will continue to be market demand-oriented and technological innovation-driven, and is committed to providing customers with efficient, safe and reliable new smart energy system solutions, continuously contributing to the high-quality development of the energy storage industry.