What are the key technologies that need to be addressed in mobile lithium-ion battery energy storage systems? The emergency power supply system of a mobile lithium-ion battery energy storage station uses lithium iron phosphate batteries, which have excellent safety, long lifespan, and high energy density, as the energy storage power source. At the same time, it combines the design concept of online UPS to achieve seamless switching between mains power and energy storage power, meeting the needs of emergency power supply and uninterrupted power supply for important loads, and making the power supply more flexible and reliable.
What are the key technological challenges to overcome in mobile lithium-ion battery energy storage systems?
Mobile energy storage systems are energy storage devices that integrate energy storage battery systems, battery management systems, energy management systems, and transportation platforms. They are characterized by their mobility, rapid response, and ease of maintenance. They are widely used in power supply security, emergency communications, important events, disaster relief, special command, and field exploration.
In some application areas, such as ensuring power supply to key facilities in a short period of time and adjusting load curves in seasonal areas, mobile energy storage systems are required. Mobile lithium-ion battery energy storage systems have significant demand in various multi-dimensional scenarios, including flexible deployment of energy storage power stations, seasonal load power supply, and roadside assistance for electric vehicles. The diversity of application scenarios and the complexity of the environment place higher demands on the overall performance of mobile energy storage systems.
1. Key technology quality and safety
When it comes to quality and safety, we must first talk about lithium-ion batteries. Currently, there are many systems, types, and manufacturers of battery cells, and different manufacturers have different models. Overall, there are several issues regarding safety and quality. Safety protection includes uniform thermal field, heat insulation and flame retardancy, and fire extinguishing. These two key aspects are reflected in our entire electrical system, structure, and heat dissipation.
2. Battery Selection
Currently, the lithium iron phosphate batteries we use most often vary greatly from manufacturer to manufacturer, resulting in differences in product performance and potential battery misuse. Furthermore, while there are national standards for energy storage technology, some standards are not strictly enforced, which can lead to significant differences in lithium-ion battery performance and even poor consistency. Therefore, the selection of high-quality batteries is crucial.
3. Battery Management
There is a problem with the management of the entire battery installation cycle: the information collection is currently inaccurate. In addition, regarding state assessment, SOC, SOH, voltage and temperature data collection, as well as analog data collection, affect the operation of the entire system. Therefore, achieving a high-precision, long-term stable lithium-ion battery management system is also a key to the safe application of mobile energy storage.
4. Uniform thermal field, thermal design and thermal simulation
We uniformly cover the thermal field throughout the entire system, inside a vehicle. Thermal field simulation requires a full-scale platform for this. Therefore, the entire battery thermal field simulation, as we understand it, involves electrochemical performance, which has extremely high temperature requirements. The management of the entire thermal system is also a key aspect of the safe and efficient operation of energy storage.
5. Safety Protection
Currently, regarding safety protection, if a lithium-ion battery experiences thermal runaway, the addition of a separator to isolate the heat presents two problems. First, there is currently no isolation between batteries, and even with excessive protection, this issue persists. One problem is the design of the heat insulation, and the other is the accumulation of heat due to the use of different excessive protection methods. Therefore, the current approach requires a robust, reliable heat dissipation, and comprehensive protection strategy, which is also the guarantee of safety in mobile energy storage.
6. Firefighting
While lithium iron phosphate batteries are generally considered safe, they still pose a fire hazard. Current safety research focuses on two aspects: fire suppression and reignition prevention, which are essential safety measures for mobile energy storage.
Features of Mobile Lithium-ion Battery Energy Storage Systems
●High energy density and good cell consistency;
● Modular design, high maintainability
● It has a clean and comfortable control room
● Graphical human-machine interface, easy to operate
● A secure and reliable BMS management system
●A good thermal management system
● The equipment is mobile and has a wide range of applications.
●Long cycle life, green and environmentally friendly, with no heavy metals, noise, or exhaust pollution, and does not consume primary energy.
●In addition to emergency power supply, it can save on peak and off-peak electricity prices during normal times, benefiting the entire life cycle.
The new generation of intelligent mobile lithium-ion battery energy storage system vehicles truly realizes the integrated system of multiple applications, including peak shaving and valley filling, power supply guarantee, emergency response, backup, capacity expansion, intelligent charging and sales, and mobile rescue. In addition to providing power supply for emergency repairs of sudden accidents such as earthquakes, ice storms, and mine disasters, as well as power supply for major political events, it can also provide emergency backup power for big data centers, hospitals, airports, and communications, provide temporary power supply during line maintenance, remove ice from icy lines, adjust peak and valley electricity loads in islands, mountainous areas, and urban commercial areas, and charge electric vehicles in cities.
Mobile lithium battery energy storage systems can be widely used in power system transmission, distribution and utilization as well as distributed new energy fields. Their modular design makes them easy to move to meet the reliability requirements of power supply loads. They have good social benefits and development prospects in terms of improving power supply service satisfaction, expanding the scope of energy services, improving the utilization rate of renewable energy, and promoting ecological and environmental protection.
