The development of a multifunctional household energy storage power supply system based on lithium iron phosphate batteries is a self-developed project by Voltoffer, which is an optional project.
1. Application fields and principles
The multifunctional household energy storage power supply system based on lithium iron phosphate batteries is mainly used in conjunction with photovoltaic access for household energy storage, emergency backup power for commercial operations, temporary power for emergency rescue and disaster relief, field exploration power, field power for national defense construction, emergency power supply, leisure camping and other backup power products.
The power supply system mainly includes a battery module and a control system, with two input ports corresponding to the mains input and photovoltaic input. The mains input charges the battery pack through the AC input module, while the photovoltaic input charges the battery pack through the photovoltaic input module. The AC output module provides 220V AC power, while the DC output module provides 5V/1A DC output for user load use.
2. Performance indicators
① Total system capacity: 2.5kWh;
② System conversion efficiency: ≥ 88%;
③ Has AC220V input;
④ Maximum inverter efficiency: ≥ 93%;
⑤ Maximum charging efficiency: ≥ 95%;
⑥ Has a photovoltaic input voltage of 30V to 100V;
⑦ Equipped with 2 5V USB output interfaces;
⑧ Equipped with thermal management function;
⑨ Equipped with uninterrupted power supply function.
3. Comparison with similar technologies at home and abroad
Compared with the performance indicators of existing systems at home and abroad, the multifunctional household energy storage power supply system based on lithium iron phosphate batteries has complete functions, with photovoltaic mains input function and a wide range of photovoltaic input. Compared with similar domestic products, it has added a mains power input function, which can ensure uninterrupted power supply to the load and expand the application range of the system. Equipped with multiple communication outputs, suitable for different regions, improving the scope of promotion and application. Merge DC USB output to expand the application range of the system; Portable design, lightweight, superior performance, small size, high energy to mass ratio density, has a significant competitive advantage. In terms of performance, the main advantage is reflected in the coordinated control between photovoltaic access, lithium iron phosphate charging, and load power supply, effectively improving the overall efficiency of the machine. Simultaneously designing a high-frequency intelligent charging system for lithium batteries, achieving a charging efficiency of over 95%. The output conversion efficiency of the system can reach 88%, effectively improving the utilization efficiency of solar energy and mains electricity.
4. Creativity and progressiveness of achievements
The creativity and progressiveness technology of multi-functional household energy storage power supply system based on lithium iron phosphate battery are mainly shown in the following aspects:
(1) A highly integrated multifunctional household lithium iron phosphate battery energy storage power supply that integrates market power access, photovoltaic access, inverter output, and DC output, and is coordinated and controlled by a central control system for the entire power system. The power supply is equipped with two charging input interfaces, with photovoltaic input and mains input capabilities, and a maximum photovoltaic input power of 1000Wp; Equipped with two types of power output interfaces, including a three hole socket for AC output, a two hole socket, and a USB interface for DC 5V output.
(2) A household energy storage power supply system based on full monitoring of voltage and temperature for all individual lithium iron phosphate batteries, and a four fold protection function combined with software and hardware coordination control based on BMS, control center, distribution circuit, and fuse. The control system has a battery management system and a charging and discharging control circuit, which have functions of overcharging, discharging, and overload protection for the battery pack. At the same time, it is equipped with a display screen and charging and discharging indicator lights, allowing users to intuitively understand the operation of the energy storage power supply. Equipped with photovoltaic input and mains input conversion switches, users can choose the charging power source according to their needs.
(3) A multifunctional household lithium iron phosphate battery energy storage power supply system based on electric shock protection safety regulations and hidden input wiring protection design.
5. Significance of action
The implementation of this project has positive significance for promoting the application of our company’s household energy storage power supply system. In the future, its industrialization can effectively enhance the brand image of Voltoffer, enhance the competitiveness of Voltoffer products in domestic and international markets, and bring new economic growth points to enterprises.
According to the national plan for the development of new energy, the rapid development of photovoltaic energy storage and other related fields in the coming years will pose a huge demand for household energy storage. The relevant policies for home appliance grid connection have also assisted the development of household photovoltaic power sources, and more households will use energy storage systems for spontaneous self use. According to the sales situation in the international market, the sales of household energy storage backup power sources are good, so the market prospects are very optimistic and have great economic benefits. Lithium iron phosphate batteries do not contain lead and sulfuric acid. The production, use, and recycling of lithium batteries do not cause any heavy metal and acid pollution to the environment, making them truly green and environmentally friendly rechargeable batteries. In the 12th Five Year Plan, the country regards energy conservation and emission reduction as an important task and requires all sectors of society to conscientiously implement it. The research and development of this project has responded to the policies and requirements of national energy development, and has made important contributions to the development and utilization of new pollution-free energy and environmental protection issues, playing a positive role in promoting. It has made outstanding contributions in effectively utilizing peak and valley electricity, supplying remote mountainous areas, emergency power supply, and other occasions. Therefore, the multifunctional household energy storage power supply system based on lithium iron phosphate batteries has enormous economic and social benefits.