Commercial Energy Storage VS Large-Scale Storage
Industrial and commercial energy storage systems typically have smaller capacities and simpler system functionalities compared to large-scale storage facilities；
The requirements for system control in industrial and commercial energy storage are lower than those in energy storage power stations. Additionally, some Power Conversion System (PCS) products in this category also incorporate Battery Management System (BMS) functionality；
Regarding Energy Management Systems (EMS), industrial and commercial energy storage systems only require the configuration of charge and discharge times to achieve energy management, with lower functional demands compared to energy storage power stations.
Batteries
In the realm of industrial and commercial energy storage, there exists a relatively lower demand for rapid response times, influenced by factors such as cost, cycle life, and response time. Consequently, these applications predominantly employ energy-type batteries.
Conversely, energy storage power stations utilize power-type batteries for frequency regulation. While many also use energy-type batteries, the necessity to provide auxiliary power services in frequency-regulation power stations imposes higher requirements on cycle life and response time, necessitating the selection of power-type batteries.
Battery Management System (BMS)
In the realm of industrial and commercial energy storage, the Battery Management System (BMS) for batteries offers the following functions:
1.Overcharging, overdischarging, overcurrent, overtemperature, undervoltage, short-circuit protection.
2.Voltage balancing during the charging process.
3.Parameter configuration and data monitoring through backend software.
Integration with various types of Power Conversion Systems (PCS) for intelligent management of the energy storage system.
Battery Management System (BMS)
In the realm of industrial and commercial energy storage:
1. Overcharging, overdischarging, overcurrent, overtemperature, undervoltage, short-circuit protection.
2. Voltage balancing during the charging process.
3. Parameter configuration and data monitoring through backend software.Integration with various types of Power Conversion Systems (PCS) for intelligent management of the energy storage system.
For Energy Storage Power Stations:
1. Hierarchical and stratified unified management, resulting in a more complex structural hierarchy.
2. Analyzing and computing various battery parameters and operational statuses based on the characteristics of each layer and level. This enables effective management, ensuring balance, triggering alarms, and providing protection mechanisms. The goal is to achieve uniform power output across all battery groups, thereby guaranteeing the system operates at its optimal state for the longest possible duration.
3. Furnishing precise and efficient battery management information. Through battery balancing management, it significantly enhances battery energy utilization efficiency and optimizes load characteristics. Simultaneously, it extends battery lifespan to the greatest extent possible, ensuring the stability, safety, and reliability of the energy storage system.
Power Conversion System (PCS)
In the context of industrial and commercial energy storage, the PCS exhibits relatively straightforward functionality, coupled with a high degree of adaptability:
1.It is based on bidirectional power conversion, offering a compact form factor that allows for flexible scalability according to specific needs. This adaptability facilitates seamless integration with battery systems.
2.It boasts an exceptionally wide voltage range spanning from 150 to 750V, making it capable of accommodating the series and parallel connection requirements of various types of batteries.
3.The PCS operates in unidirectional charge and discharge mode, making it compatible with a diverse range of photovoltaic inverters.
On the other hand, for energy storage power stations, the PCS assumes the additional role of grid support:
1.The converter’s DC-side voltage range is broader, allowing it to operate at full load with voltages up to 1500V.
2.Beyond its core converter functions, it also possesses grid support capabilities, such as primary frequency regulation and rapid source-grid-load scheduling. This enhances its adaptability to the grid, enabling swift power response times (<30ms).
Energy Management System (EMS)
In the realm of industrial and commercial energy storage, the majority of applications do not require grid dispatch, which leads to a relatively basic functionality requirement for EMS systems. The primary focus is on local energy management:
1.Support for battery balancing within the energy storage system to ensure safe operations.
2.Capable of millisecond-level rapid response, enabling integration management of energy storage subsystems and centralized control.
Conversely, energy storage power stations necessitate grid dispatch, demanding more comprehensive functionalities from the EMS system. In addition to fundamental energy management features, these requirements include:
1.The capability to provide grid dispatch interfaces and energy management functions for microgrid systems.
2.Support for multiple communication protocols, incorporating standard power dispatch interfaces.
3.Proficiency in managing and monitoring energy for applications such as energy transfer, microgrids, and power frequency regulation.
4.Support for monitoring multiple-energy complementary systems, including sources, grids, loads, and storage.
Battery Thermal Management
Industrial and commercial energy storage systems focuses on relatively smaller capacities and typically employs simplified thermal control strategies to maintain suitable operating temperatures for ensuring basic performance. In contrast, the battery thermal management in large-scale energy storage systems is more intricate due to their higher capacity and power requirements, necessitating more precise thermal control and heat dissipation design to ensure temperature uniformity, safety, and longevity of the battery packs.
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