Keynote Speakers:

Gwomei Wu.jpg

Prof. Gwomei Wu


Institute of Electro-Optical Engineering, Chang Gung University, Taiwan, China


Title: Metal-Air Battery Technology and Its New Development


AbstractNew metal-air battery has high energy density, and can be used in many ways. It is composed of three parts, including oxidation-reduction double catalyst and porous air cathode for rechargeable lithium-air battery; aprotic/aqueous electrolytes, high ionic-conducting lithium ion conducting membrane and solid electrolytes; and liquid-flowing battery design, manufacturing, assembly and evaluation/testing. However, the discharge product can block the porous air cathode and hinder oxygen diffusion and degrade the electrochemical efficiency, leading to battery failure. The mixed electrolyte battery uses aqueous electrolyte and ion conducting membrane, so that it can directly consume oxygen and avoid the air cathode blockage by precipitates. On the other hand, the LiOH can precipitate at the saturated concentration of 5.3 M. An alkaline environment will cause corrosion. They all create problems for the long term stability of metal-air battery. We integrate fuel cell and liquid-flowing battery to develop mixed electrolyte energy storage system that can be constantly supplied with unsaturated electrolyte solutions. The ultimate goal will be to increase new battery cycle life with high energy density for electrochemical applications.

Oral Presentation:

1.孙荣利 - 重庆三峡学院

Lirong Sun - Chongqing Three Gorges University, China

Title: A New Method for Charging and Repairing Lead-acid Batteries

Abstract: With the rapid development of China's electric vehicle industry, the demand for vehicle-mounted lead-acid batteries is increasing, and higher requirements are put forward for their safety and reliability. There are some problems in lead-acid batteries, such as short service life and decreasing capacity. In this paper, a new method of charging and repairing lead-acid batteries is proposed. Firstly, small pulse current is used to activate and protect the batteries in the initial stage; when the current approaches the optimal current curve, the phase constant current charging is used instead, when the voltage is low. When the value is in stable state, the polarization and vulcanization phenomena of batteries in the earlier stage can be eliminated by using the composite resonant pulse repair technology. When the vulcanization and polarization phenomena are eliminated successfully, the REFLEXYM charging method is carried out immediately to protect the batteries, and the batteries can be controlled by intermittent charging at this stage. The phenomenon of temperature rise is helpful to prolong the life of the battery. Finally, it enters the floating charging stage, providing a very small trickle current to compensate for the self-loss of the battery, so that the battery can remain fully charged.

This new charging and repairing method can not only eliminate the polarization and vulcanization of the battery, but also control the temperature rise of the battery, which can extend the service life of the battery. This paper gives the specific methods to solve the polarization and vulcanization of batteries and the working principle of each charging stage.

2.彭宇豪 - 大连理工大学

Yuhao Peng - Dalian University of Technology

Title: Numerical Modelling on the Performance of a Rolling-type Wave Energy Converter with Mooring System

Abstract: This paper presents the performance results of the numerical study on the three-dimensional rolling-type wave energy converter with the mooring system. The novel device combines an established and reliable mooring system, making it suitable for deeper sea utilisation. The shape of the device is based on the renowned Salter’s Duck, which is capable for converting wave energy into mechanical energy through rolling back and forth. The results are obtained using the Panel Element Method package AQWA, based on linear wave theory and potential flow theory. The hydrodynamic behaviour of the device is assessed in the frequency domain, including the additional mass, the radiation damping and the wave exciting force. In the time domain, the coupling of the device motion and the dynamic response of the mooring system is performed, allowing comparisons with experimental work on a 1:16 scale model. The tension of the anchor chain is reported in detail. The relative capture width of the device under different wave conditions is also examined.

3.彭丽媛 - 国家电投集团电站运营技术(北京)有限公司

Liyuan Peng - SPIC Power Plant Operation Technology(Beijing) CO.,LTD

Title: Research on energy supply of intelligent energy system with energy storage

Abstract: The coordinated intelligent energy supply should consider the characteristics of the energy supply equipment,  load characteristics and user needs. As a special energy supply equipment, water energy storage system has two-way controllability, which can storage and release energy. Using its energy supply characteristics, combined with the system characteristics such as peak valley electricity price difference, it is helpful to achieve peak load reduction, balance load and save energy supply cost of the system. In this paper, an enterprise park is taken as an example to study on the energy supply of intelligent energy system with water energy storage. An energy supply strategy is proposed. An energy supply model is established. At last, the simulation verifies the advantages of intelligent energy system with water energy storage.

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