Nanoporous gold (NPG) was prepared on Ni foam through electrodeposition of Au-Sn alloy and chemical dealloying. MnO2 was electrodeposition NPG/Ni foam to obtain the MnO2@NPG/Ni foam electrode material. The surface morphology and composition of the MnO2@NPG/Ni foam electrode were characterized by means of scanning electron microscopy (SEM)，energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The as-prepared electrode was employed as the supercapacitor electrode material, and its charge-discharge characteristics and cyclic stability were tested. The results show that the MnO2@NPG/Ni foam electrode exhibits a greatly enhanced specific capacitance, better rate capability and cyclic stability compared to the MnO2@Ni foam electrode. The MnO2@NPG/Ni foam composite electrode provides a specific capacitance of 377.9 F·g1 at a current density of 1 A·g1. The capacitance retention of the MnO2@NPG/Ni foam composite electrode remains 99% after 2500 cycles at a scan rate of 50 mV·s1.

PLC communication will be interfered by harmonics in the charging circuit for the electric vehicle based on the power line carrier, thus, affecting system stability. Regarding harmonic currents in three-phase four-wire uncontrollable rectifier and high-frequency power conversion, active and passive filters with the specified sub-harmonic control strategy can be adopted to change the n times of harmonics in the detected load current signal to DC value through the synchronous rotating reference frame. Current. And current PI control is conducted upon extracted by the low-pass filter to achieve the purpose of eliminating the specified harmonics. Both the theoretical analysis and simulation experiment showed that the method can effectively filter the current harmonics to ensure the sinusoidal characteristics of the current waveform, providing a theoretical reference for the upcoming PLC communication construction of the electric vehicle charging station.

With the development of electric vehicles (EVs) and hybrid electric vehicles (HEVs), the high-power lithium-ion battery is urgently needed. Nowadays, the commercial anode material is still mainly occupied by graphite. When charging in high-rate, the diffusion of lithium is greatly restricted because of the small interlayer distance (0.335 nm) of graphite, leading to a inferior high-rate charge performance. Therefore, the preparation and evaluation of fast-charging graphite will promote the application of lithium-ion battery in the EVs or HEVs. In this paper, a kind of artificial graphite with a diameter~6.7 μm is modified by coated with hard carbon to improve the fast-charging performances. The physical properties of uncoated and coated materials are characterized by SEM and BET. And the initial charge/discharge, rate, EIS and GITT were applied to evaluate the impact of hard carbon layer on the fast-charging performances.

 The SiO/C composites were synthesized via a simple stirring and following pyrolysis of silicon monoxide and pitch mixture. Then Al2O3-SiO/C composites were prepared by water bath heating and the thermal decomposition using SiO/C composites, aluminium nitrate, ammonia solution, urea as raw materials. The phase composition, morphology and structure of the samples were characterized by XRD, SEM, specific surface area and laser particle analyzer. As a result, the electrochemical performance indicated the Al2O3-SiO/C composites with the urea had the best electrochemical performance and exhibited the reversible capacity of 1436.4 mA·h·g1 and 74.81% coulombic efficiency in the initial cycle.

Ni-MH battery is a high-capacity, high-power, pollution-free battery, and widely used in the field of electric vehicles and power storage areas. It is necessary to understand the basic characteristics of NiMH batteries for subsequent modeling, SOC estimation and in the application of its advantages. Therefore, the test on the battery, including charge and discharge characteristics, efficiency characteristics, internal resistance characteristics. According to the test results, draw the corresponding curve and analysis. Test and analysis results show that nickel-metal hydride batteries act the best performance in the SOC of 0.2—0.8.

Ni-MH battery has been widely used, because its advantages of high security, over-charge, over-discharge in the field of energy storage systems and electric vehicles. In order to ensure that the energy storage battery can be safe and efficient operation, and to extend the battery life, battery management system (BMS) must be needed. According to the characteristics of the battery in the energy storage system, this paper developed the energy storage battery management system based on Freescale S12X series microprocessor MC9S12XEG128 and power management chip LTC6803, this system can achieve 12-channel voltage and 8-channel temperature data acquisition and processing. This paper presents the overall architecture of the energy storage management system, emphasizing on the hardware design circuit and the software processing method of voltage and temperature sampling. Experiments were carried out by LTC6803 and AD7280A two dedicated chips and commonly used distributed sampling scheme for battery module voltage measurement data comparison. Experiments verify the LTC6803 power management chip in the energy storage management system advantages.

As the utilization of fossil fuels and coal leads to climate changes and global warming, the renewable energy generation such as PV and wind power has been developing at a fast pace. However the renewable energy resources which are influenced by nature factors are mostly with randomness and intermittency. When the photovoltaic plant is connected to grid, it will be confronted with reliability problem. This paper takes grid-connected photovoltaic plant as a study subject and the output power smoothing as a target. The model allocates the energy storage system based on Discrete Fourier transform theory and the fluctuation constraint is always satisfied while translating the time window when optimization is finished. In this way the impact of traditional photovoltaic plant on the grid is reduced effectively. The method adapted in this paper is easy to satisfy different fluctuation constraints and be applied in practice. Finally the proposed method is verified on a photovoltaic plant in the case study section.

 This paper first analyzes the electric power industry of substation VRLA battery discharge online have not been promoted the reason which leads to the necessity of grid connected inverter; remote discharge this remote discharge mode, a discharge of the nuclear capacity is to save cost, release maintenance manpower; two is the discharge process of full free heat, safe and reliable, the three is to adapt to the automation of electric power system the requirements, effectively avoid the risk of nuclear operation capacity of artificial discharge; four is the national energy conservation policy; five is the micro grid development requirements; and then introduces the safety guarantee measures of inverter discharge, inverter grid connected remote discharge technology maturity is the prerequisite of ensuring the safety of the battery remote discharge system and describes the one-way diode; automatic switching technology and circuit can effectively protect the battery always online, so as to guarantee the safety of substation substation far; The discharge process of inverter power is small, does not affect the public grid; various national compulsory certification standards, requirements of inverter equipment should be verified by third party certification body meets the specification can be put into use before using these security measures to guarantee the safety of the inverter discharge, for inverter remote discharge system applied in Substation.

The organic carbonates are widely used as solvent of Li-ion battery electrolyte, but few papers discussed their chemical reaction with acids and bases. Here we summarize the chemical reaction between organic carbonates and some most-used acids and bases, provideing some necessary information for researching on solvent stability and handling of disposed electrolyte.

 Energy storage industry is China's emerging industries, but the current slow development. In this paper, through the comparative analysis of the commonality of energy storage system and sponge city function, it is found that the technical theory system of the two systems has the same effect as "the same", and from the point of view of urban planning, the feasibility of integrating the energy storage system into the theoretical system of sponge city Can support the development of industry, as soon as possible to start energy storage system planning research work recommendations.

 The source of smog and air pollutants, the status quo and development forecast of photovoltaic and wind power in 2020 were expounded. The development forecast of new energy and primary energy consumption ratio in the European Union and China in 2050, the heating of coal to electricity, the relationship between household energy storage and carbon emission on air pollutants were also elaborated.

 This paper briefly introduces the background of the Shenzhen pumped-storage power station low-carbon intensive construction, analyzes the facilities which can be low-carbon intensive constructed of pumped-storage power station, introduces five measures for power station low-carbon intensive construction and selection for the relevant indicators; by contrasting the construction scale with other domestic pumped-storage power station to demonstrate the rationality and progressiveness of the Shenzhen pumped-storage power station low-carbon intensive construction.

In this paper, we studied the distribution patents and the technology development of solid-polymer electrolyte lithium-ion battery. The patent information in this paper was collected from Derwent Innovations Index database and Patent Analysis Online System of Chinese Academy of Science. We analyzed the application year, technological distribution, main countries or regions, key applicants of related patents by using Thomson Data Analyzer (TDA) and Microsoft Excel, and importantly focused on the patents applied in China. Based on the analysis, we got the international and national situations and development trends of solid-polymer electrolyte lithium-ion battery in order to provide some reference for development of this area in China.

In order to provide advices about technology innovation and industrialization of lithium-sulfur battery for our country, relevant patents applied in China were retrieved from the incoPat platform. The patent profiles were then analyzed with respect to application trend, countries of applicants, main applicants, types of applicants, patent values of main applicants, technical distribution of patents and technical structure of patents. Subsequently, patent portfolio and technical route of important foreign applicants were specifically addressed. Based on the analysis, advices with respect to R&D, patent application and protection of lithium-sulfur battery technology were lay out.