Stockage d'énergie par batterie: Application Industries, Scenarios and Future Trends

Against the backdrop of global energy structure transformation and the “dual carbon” goal, battery energy storage, as a core technology to solve the instability of renewable energy power generation and optimize the efficiency of power supply and demand, has become a key support for the high-quality development of the new energy industry. It connects the links of power generation, transmission, distribution and consumption, and plays an irreplaceable role in promoting energy conservation, emission reduction and energy security. ECO Electronics, with profound technical accumulation in the field of new energy supporting products, closely focuses on the application needs of battery energy storage in various industries, provides high-reliability supporting solutions for battery energy storage systems, and helps the global energy transition process.

1. Core Application Industries

Battery energy storage, as a flexible and efficient energy storage method, covers multiple fields such as new energy power generation, power grid operation, industrial production and daily life. Its development is closely linked to the upgrading of downstream industries and policy guidance. The core application industries are as follows:

1. Renewable Energy Power Generation Industry

Renewable energy such as photovoltaic and wind power has the characteristics of randomness, intermittency and volatility, which easily leads to problems such as grid instability and “abandoned wind and abandoned light” during power generation. Battery energy storage can store the surplus electric energy generated by photovoltaic and wind power when the power generation is high, and release it when the power generation is insufficient or the power demand is peak, effectively solving the problem of power generation fluctuation and improving the utilization rate of renewable energy. According to relevant data, the global energy storage matching rate of photovoltaic and wind power projects will reach 15% by 2025, and the demand for battery energy storage in this field will maintain a compound annual growth rate of more than 28%[2]. The upstream core materials of battery energy storage, such as positive electrode materials, negative electrode materials, electrolyte and diaphragm, directly determine the core performance of energy storage batteries, among which the cost of positive electrode materials accounts for about 42% of the total battery cost.

2. Power Grid Industry

In the power grid system, battery energy storage undertakes important functions such as peak shaving, valley filling, frequency modulation, voltage regulation and emergency backup, which is crucial to improving the stability and flexibility of the power grid. With the large-scale grid connection of renewable energy and the rapid development of new power systems, the demand for battery energy storage in the power grid field is increasing. It can alleviate the pressure of power grid peak load, reduce the investment in power grid transformation, and ensure the safe and stable operation of the power grid. The battery energy storage system in the power grid field is mainly composed of battery packs and “3S” systems (EMS, PCS, BMS), among which PCS (energy storage converter) has the highest technical barrier and relatively larger profit space.

3. Industrial and Commercial Industry

Industrial and commercial enterprises have large power consumption and obvious peak-valley differences in power use, and battery energy storage can help enterprises achieve peak-valley price arbitrage, reduce electricity costs. At the same time, it can provide emergency power supply for enterprises, avoid economic losses caused by power outages, and ensure the normal operation of production equipment. In addition, industrial and commercial battery energy storage can also participate in the demand response of the power grid, obtain relevant policy subsidies, and further reduce the operation cost of enterprises. For high-energy-consuming industries such as manufacturing and chemical industry, battery energy storage has become an important means to optimize energy allocation and reduce energy consumption.

4. Residential Energy Storage Industry

With the popularization of household photovoltaic systems and the improvement of residents’ awareness of energy conservation and environmental protection, residential battery energy storage has gradually entered thousands of households. It can store the electric energy generated by household photovoltaic panels for daily use, reduce the dependence on the public power grid, and save electricity bills. At the same time, in the case of power grid blackout, it can provide emergency power supply for household electrical appliances, improving the reliability of household power supply. In European and American countries, the penetration rate of residential energy storage has exceeded 10%, and the market scale in China is also growing rapidly, showing broad development prospects.

5. Transportation Industry

In the transportation field, battery energy storage is mainly used in new energy vehicles, rail transit, ships and other fields. For new energy vehicles, the power battery itself is a kind of energy storage device, and the supporting energy storage charging and swapping facilities can solve the problems of long charging time and insufficient charging piles, improving the convenience of using new energy vehicles. For rail transit and ships, battery energy storage can provide auxiliary power supply and energy recovery, reducing energy consumption and environmental pollution. In addition, the retired power batteries of new energy vehicles can be applied to energy storage and backup power through echelon utilization, which improves the resource utilization rate and reduces the cost.

6. Emergency and Special Scenarios Industry

Battery energy storage has the characteristics of fast response, flexible deployment and easy installation, and is widely used in emergency power supply scenarios such as natural disasters, public emergencies and remote areas. For example, in areas affected by earthquakes, floods and other disasters, battery energy storage can provide temporary power supply for rescue work, medical equipment and residents’ lives. In remote areas without grid coverage, battery energy storage can be combined with photovoltaic and wind power to form an off-grid power supply system, solving the problem of electricity use for residents and infrastructure.

1. Typical Application Scenarios

Different application industries have different requirements for battery energy storage systems, such as energy density, cycle life, safety performance and environmental adaptability. According to the characteristics of different industries, the typical application scenarios of battery energy storage are as follows:

1. Renewable Energy Power Generation Scenarios

• Photovoltaic supporting energy storage: It is mainly used in large-scale photovoltaic power stations and distributed photovoltaic projects. When the sunlight is sufficient, the surplus electric energy generated by the photovoltaic system is stored in the battery energy storage system; when the sunlight is insufficient or at night, the stored electric energy is released to the power grid or the load side, ensuring the continuous and stable power supply of the photovoltaic system. The battery energy storage system needs to have good cycle life and charge-discharge efficiency, and adapt to the outdoor harsh environment (high temperature, low temperature, strong ultraviolet radiation). The “3S” system cooperates with the battery pack to complete the energy storage and release process, among which EMS is responsible for overall decision-making, PCS is responsible for charge-discharge execution, and BMS is responsible for battery safety monitoring.
• Wind power supporting energy storage: It is used in onshore and offshore wind farms. Due to the instability of wind speed, the power generated by wind turbines fluctuates greatly. Battery energy storage can smooth the power output, avoid the impact of power fluctuation on the power grid, and improve the grid connection capacity of wind power. Offshore wind power supporting energy storage needs to have good corrosion resistance and waterproof performance to adapt to the marine environment.

2. Power Grid Operation Scenarios

• Peak shaving and valley filling: During the peak period of power consumption (such as morning and evening peak), the battery energy storage system releases electric energy to the power grid to alleviate the peak load pressure of the power grid; during the valley period of power consumption (such as late night), it absorbs the surplus electric energy of the power grid for storage, improving the utilization rate of power grid resources. This scenario requires the battery energy storage system to have large capacity and fast charge-discharge speed.
• Frequency modulation and voltage regulation: The battery energy storage system can quickly respond to the frequency and voltage changes of the power grid, adjust the charge-discharge power in real time, maintain the stability of the power grid frequency and voltage, and improve the power quality of the power grid. Compared with traditional frequency modulation methods, battery energy storage has the advantages of fast response speed and low operation cost.
• Emergency backup power supply: When the power grid fails or has a blackout, the battery energy storage system can quickly start to provide emergency power supply for key loads (such as hospitals, power stations, communication hubs), ensuring the normal operation of key infrastructure.

3. Industrial and Commercial Application Scenarios

• Peak-valley price arbitrage: Industrial and commercial enterprises charge the battery energy storage system during the valley period of electricity price (low price) and discharge it during the peak period of electricity price (high price), reducing the electricity cost of enterprises. This scenario requires the battery energy storage system to have high charge-discharge efficiency and long cycle life to ensure the economic benefits of arbitrage.
• Emergency power supply for production: For enterprises with high requirements for power supply reliability (such as electronic manufacturing, precision processing), the battery energy storage system can provide uninterrupted power supply when the power grid is cut off, avoiding production interruption and economic losses caused by power outages.
• Demand response: Enterprises participate in the demand response program of the power grid through the battery energy storage system, adjust the power consumption load according to the dispatch requirements of the power grid, and obtain policy subsidies, further reducing the operation cost.

4. Residential and Emergency Scenarios

• Household photovoltaic energy storage integration: The household battery energy storage system is connected with the household photovoltaic panel, storing the surplus electric energy generated by the photovoltaic panel for daily use of household appliances, and the excess electric energy can be connected to the grid to obtain income. The system is small in size, easy to install, and has high safety performance, which is suitable for household use.
• Emergency power supply for special scenarios: In natural disasters (earthquakes, floods, typhoons) and other emergency scenarios, the mobile battery energy storage system can be quickly deployed to provide temporary power supply for rescue equipment, medical devices, communication equipment and residents’ daily life. The system has the characteristics of flexible movement and fast response, which can effectively guarantee the smooth progress of emergency rescue work.

III. Future Development Trends

Driven by policy support, technological innovation and market demand, the battery energy storage industry is entering a period of rapid development, showing the development trends of high safety, high efficiency, intelligence, greenization and integration. The key development trends are as follows:

1. Continuous Improvement of Safety Performance

Safety is the core premise of the development of battery energy storage. In the future, with the continuous progress of battery technology, the safety performance of battery energy storage systems will be further improved. New battery materials (such as solid-state batteries, sodium-ion batteries) will gradually replace traditional lithium-ion batteries, reducing the risks of fire and explosion. At the same time, the optimization of battery management system (BMS) and the improvement of safety monitoring technology will realize real-time monitoring of battery temperature, voltage, current and other parameters, timely warning and handling of potential safety hazards, ensuring the safe and stable operation of the system. The technical improvement of key links such as diaphragms (the link with the highest technical barrier in upstream materials) will also further enhance the safety of energy storage batteries.

2. Improvement of Energy Density and Charge-Discharge Efficiency

Improving energy density and charge-discharge efficiency is the key direction of battery energy storage technology innovation. On the one hand, the research and development of new battery materials and the optimization of battery structure will effectively improve the energy density of the battery, reduce the volume and weight of the energy storage system, and reduce the construction cost. On the other hand, the upgrading of charge-discharge control technology and the optimization of the “3S” system will improve the charge-discharge efficiency of the system, increase the utilization rate of electric energy, and enhance the economic benefits of battery energy storage. It is expected that by 2030, the energy density of power batteries for energy storage will double compared with the current level, and the charge-discharge efficiency will exceed 95%.

3. Intelligent and Digital Development

The integration of intelligent technologies such as the Internet of Things, big data, artificial intelligence and digital twin with battery energy storage systems will become an inevitable trend. The intelligent battery energy storage system can realize real-time monitoring, remote operation and maintenance, and intelligent scheduling, reducing manual intervention and improving the operation efficiency of the system. Digital twin technology can simulate the operation state of the energy storage system, predict potential faults, and provide a basis for the optimization of the system. At the same time, the integration of battery energy storage with smart grids and microgrids will realize the intelligent allocation of energy and improve the overall efficiency of the energy system. The intelligent upgrading of the “3S” system will further promote the digital transformation of the battery energy storage industry.

4. Green and Low-Carbon Development

Guided by the global “dual carbon” goal, green and low-carbon has become the core direction of the development of the battery energy storage industry. On the one hand, the research and development and application of environmentally friendly battery materials (such as recyclable battery materials, biodegradable electrolytes) will reduce environmental pollution during the production, use and disposal of batteries. On the other hand, the echelon utilization of retired power batteries and the recycling of waste batteries will realize the recycling of resources, reduce resource waste, and promote the green cycle development of the industry. In addition, the optimization of the energy storage system will reduce energy loss during the charge-discharge process, further improving the energy conservation and emission reduction effect. The echelon utilization of retired power batteries will become an important part of the green development of the industry, which can not only save costs but also improve resource utilization efficiency.

5. Integration and Diversification Development

The integration of battery energy storage with renewable energy (photovoltaic, wind power), smart grid, microgrid and other fields will become more close, forming a comprehensive energy system integrating power generation, storage and consumption. At the same time, the application scenarios of battery energy storage will be more diversified, expanding from traditional power generation, power grid and other fields to transportation, emergency rescue, military and other fields. In addition, the form of battery energy storage will also be more flexible, including centralized energy storage, distributed energy storage, mobile energy storage and other forms, to meet the needs of different scenarios. The integration of the upstream, middle and downstream industrial chains of battery energy storage will be further strengthened, forming a complete industrial ecosystem from core materials to system integration and operation services.

6. Reduction of Cost and Industrial Concentration Improvement

With the large-scale production of battery materials, the maturity of technology and the intensification of market competition, the cost of battery energy storage will continue to decline, which will further promote the popularization and application of battery energy storage. It is expected that by 2028, the cost of battery energy storage systems will drop by more than 50% compared with the current level. At the same time, the industry integration will be accelerated, small and medium-sized enterprises with backward technology and low competitiveness will gradually withdraw from the market, and leading enterprises will expand their advantages through technological innovation and resource integration, and the industry concentration will be further improved. The concentration of key links such as diaphragms in the upstream industry is already relatively high, and this trend will continue to spread to the entire industrial chain.

1. ECO Electronics’ Layout and Practice

In response to the development trends of the battery energy storage industry, ECO Electronics relies on its professional technical team and strict quality management system, focusing on the R&D and production of high-reliability supporting products for battery energy storage systems. We provide customized supporting solutions for battery energy storage systems in renewable energy, power grid, industrial and commercial, residential and other fields, including high-precision connectors, customized cable assemblies and other core supporting products, which are compatible with various battery energy storage systems and meet the requirements of high safety, high efficiency and environmental adaptability. We strictly control the product R&D, production and testing processes, select high-quality materials, and ensure that the products meet international stringent standards, providing reliable support for the stable operation of battery energy storage systems. In the future, ECO Electronics will continue to increase R&D investment, track the latest technological trends in the industry, deeply integrate with the battery energy storage industry, break through core technical bottlenecks, and contribute professional strength to the global energy transition and green low-carbon development.