With the widespread application of electric vehicles (EVs) and the continuous development of battery energy storage systems (BESS), integrating the two into the distribution system has become an important direction for future energy management. This paper summarizes the energy management strategy of electric vehicle and battery energy storage system, analyzes its key technologies, and discusses the current situation and development prospect in this field in China.

in recent years, rising global energy demand, the traditional energy supply pressure, environmental pollution is becoming more and more serious. To address these challenges, electric vehicles and battery energy storage systems have received a lot of attention. Electric vehicles are clean, efficient and convenient, and are considered to be the mainstream of the future transportation field. The battery energy storage system can effectively regulate power supply and demand, improve the operation efficiency of the power grid, and help achieve a high proportion of new energy access. The integration of electric vehicles and battery energy storage systems into the distribution system can achieve optimal allocation of energy, improve energy utilization efficiency, and reduce energy costs.

1. Distribution system energy management strategy integrated with electric vehicles and battery energy storage system

1.1 Overview of energy management strategy

Distribution system energy management strategy integrated with electric vehicles and battery energy storage system mainly includes the following aspects:

(1) Demand response: By adjusting the charging strategy of electric vehicles, participate in the peak-valley regulation of the power grid, reduce the peak load of the power grid and improve the operation efficiency of the power grid.

(2) Energy optimization configuration: According to the real-time power demand and the status of the battery energy storage system, optimize the charging power of electric vehicles and the charging and discharging strategy of the battery energy storage system to achieve efficient use of energy.

(3) Fault handling and recovery: When the power grid fails, the electric vehicle and the battery energy storage system work together to ensure the stability of the power supply.    

1.2 key technology

(1) electric vehicle charging control technology: By monitoring the charging demand and grid load of electric vehicles in real time, the charging power can be adjusted to realize the coordination between electric vehicle charging and grid load.

(2) Battery energy storage system control technology: according to the demand of the power grid and the state of the battery, optimize the charge and discharge strategy of the battery, improve the efficiency and life of the battery.

(3) Energy management platform technology: Build an energy management platform integrated with electric vehicles and battery energy storage systems to achieve real-time monitoring, remote control and data analysis and other functions.

2. China's current situation and development prospects

In recent years, China's electric vehicle industry has developed rapidly and has become the world's largest electric vehicle market. At the same time, the government has given strong support to the development and application of battery energy storage systems. However, the integration of electric vehicles and battery energy storage systems into the distribution system still faces many challenges, such as inconsistent technical standards, insufficient policy support, and imperfect industrial chain.

In the future, China should increase policy support to promote the development and application of electric vehicles and battery energy storage system integration technology. In addition, it is also necessary to strengthen the cooperation between upstream and downstream enterprises in the industrial chain, establish a sound energy management service system, and improve the application efficiency of electric vehicles and battery energy storage systems in the distribution system.

3. Key technical challenges and solutions

3.1 key technical challenge and

in the electric car and battery energy storage system integration of power distribution system, the following key technical challenges:

(1) EV charging demand forecasting: Accurately forecasting EV charging demand is a challenge due to uncertainties in when, where and how many EVs will be charged.

(2) Health status management of battery energy storage system: the performance and life of battery energy storage system are affected by factors such as charge and discharge cycle, temperature, charge and discharge rate, and how to extend battery life and maintain its high performance is a key issue.

(3) Energy management and optimization: how to optimize the charging plan of electric vehicles and the charging and discharging strategy of battery energy storage system while ensuring the stability of power supply, so as to achieve efficient use of energy.

3.2 solution

(1) set up the electric car charge demand forecasting models: By collecting historical charging data, weather forecasts, traffic flow and other information, machine learning models are built to predict the charging needs of electric vehicles. (2) Develop a battery health monitoring and management system: adopt advanced battery management technology to monitor the charging and discharging status, temperature and other parameters of the battery in real time, optimize the charging and discharging strategy, and extend the battery life.

(3) Design energy management and optimization algorithms: design intelligent optimization algorithms based on real-time power demand, battery energy storage system status and electric vehicle charging demand to achieve efficient energy management and optimization.

4. Policy and market to promote

4.1 policies to promote

the government in the field of electric vehicles and battery energy storage system integration role is crucial.

(1) Develop uniform technical standards and specifications to ensure the compatibility and interoperability of electric vehicles and battery energy storage systems.

(2) Provide financial subsidies and tax incentives to encourage businesses and consumers to invest in and implement electric vehicles and battery energy storage systems.

(3) Strengthen regulation and enforcement to ensure the safe, environmentally friendly and reliable operation of electric vehicles and battery storage systems.

4.2 market promote the

market promotion is the key to the success of the electric car and battery energy storage system integration. The following are some market driving directions:

(1) Establish a sound charging infrastructure, provide convenient charging services, and attract more consumers to choose electric vehicles.

(2) Cultivate battery energy storage system service providers, provide battery rental, operation and maintenance services, and reduce the entry barrier of enterprises.

(3) Develop value-added services, such as V2G (Vehicle-to-Grid) services, to enable electric vehicles to act not only as energy consumers, but also as energy suppliers, improving the flexibility and reliability of the grid.

Distribution system energy management strategy integrated with electric vehicles and battery energy storage systems is a complex and important research area. The high efficiency of energy utilization and the stability of power supply can be achieved through the strategies of demand response, energy optimal allocation, fault handling and recovery. Critical technological challenges require the development of advanced predictive models, health monitoring systems, and energy management and optimization algorithms. At the same time, government policies and market promotion are crucial for the widespread application of electric vehicles and battery energy storage systems. By strengthening research and development, formulating policies and cultivating the market, China is expected to make important breakthroughs in the field of energy management of distribution systems integrated with electric vehicles and battery energy storage systems.