Papers by Keyword: Formation

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Authors: Liang Han, Feng Xiao, Xin Pan Chu, Jun Feng Xue, Qi Biao Chen, Min Lei, Lei Xiang Zhang
Abstract: Li-ion battery is used widely in many industrial areas, and formation is a necessary process in battery manufacture. After formation, the performance of Li-ion power batteries can be activated. In the process of production, the key technology in the formation has been changed. The technology of formation and holding independently for each battery is turning into the formation after being clamped and then holding now. Therefore, the design of the automatic production line must base on the battery groups after being clamped. This text will introduce a new production line for the formation of Li-ion battery, mainly discuss the formation of clamped batteries, and how to realize the automation of the production line. The line uses the three-dimensional multi-layer frameworks, speed-fold chains and stoppers. The speed-fold chain is a new type of conveyor chain, and known as "flexible manufacturing unit". The battery groups can be stopped in the manufacturing line by the stoppers, and then they can be charged or discharged. The line can be connected by the lifting machine.
Authors: Liang Han, Feng Xiao, Lu Zhou
Abstract: The automation level has a great influence on the consistency of batteries. By now, an improvement of formation process has proposed new requirements for the formation equipment. This paper brings forward the application of double plus chain mechanism to formation equipment. The chain running at a low speed, the batteries on it move quickly and smoothly. The stopper can stop them for some specific operations without blocking other battery packs. PLC cooperating with signal input and receiving units makes it easy to meet the control requirements. If process changes, we only need to adjust the location of detection devices and execution units. Thus, the control system is very flexible and adaptive.
Authors: Ke Tang, Chang An Wang, Ai Guo Zhou, Li Feng Wu, X.L. Xu, Yong Huang
Authors: Liang Han, Feng Xiao, Yuan An Li
Abstract: Li-ion power battery which has a broad prospect of application in many industry fields is a new type of high power battery. The formation is a necessary process in battery manufacture. Every battery should be charged and discharged several times. On account of the current li-ion power battery’s problem of great amount of energy waste for using conventional techniques in the process of formation, two schemes about formation energy recycling are proposed. One of the schemes is to transfer energy from discharging batteries to charging batteries. It uses energy balance control strategy, and the efficiency can reach to 98%. The other one which uses PWM rectifier is energy feedback to grid scheme. The efficiency can reach to 95%.
Authors: Han Liang, Xiao Feng, Yuan An Li
Abstract: Li-ion power battery which has a broad prospect of application in many industry fields is a new type of high power battery. The formation-testing and sorting-packing are necessary processes in battery manufacture. Currently the process of formation almost takes the way of monomer battery, then sorting and packing by measuring the parameters of its internal resistance, voltage and capacity. The operation is complicated and the amount of data is huge. On account of the problem, we propose a new process of battery modularization. It can greatly reduce the workload of the parameter testing when using the optimized process. And batteries can get a good consistency, which is favor of sorting-packing and production automation.
Authors: Feng Xiao, Liang Han, Xin Pan Chu, Jun Feng Xue, Qi Biao Chen, Min Lei, Lei Xiang Zhang
Abstract: Li-ion power battery which has a broad prospect of application in many industry fields is a new type of high power battery. The formation is a key process in battery manufacture. After formation, the active materials of anode and cathode in the battery can be activated. Consequently, the charge-discharge performance, self-discharge performance, reserve performance and some other comprehensive performances can be improved. Only after formation can batteries achieve the best performance. With the change of formation process, the formation and holding for a single battery has been changed to for a group. Therefor, a new type of battery parameter testing equipment needs to be designed, which can test a group of batteries automatically. This paper will introduce the design of this equipment thoroughly.
Authors: Liang Han, Feng Xiao, Jia Wen Chen
Abstract: This article introduces two manipulator design schemes which can be applied in lithium battery formation process. According to the actual production conditions, we chose the second design scheme and successfully made a manipulator. In order to achieve effective gripping of the lithium battery, flexible shift and precise placement, the manipulator uses the pneumatic drive which is controlled by a computer to achieve the rotation movement, vertical offset and the gripper of the manipulator closing and opening operations. The manipulator can be completely able to meet the production line demand and the efficiency is much higher than manual work, which is proved by practice.
Authors: Jin Gui Huang, Juan Huang, Cheng Yang, Gui Cheng Wang
Abstract: A three-dimensional model of micro-turning using the finite element method (FEM) is created in this paper to analyzed the formation mechanism and influencing factors of feed-direction burr in micro-turning. According to the simulation and analysis result, in micro-turning,the deformation of the workpiece feed direction end is the combined action of the plastic bending deformation and shear slip deformation, and plastic bending deformation influences burr height and shear slip deformation affects the burr root thickness. Meanwhile, due to the amount of material involved in different deformation actions is changed, compared with conventional scale cutting, the various influencing factors have significant differences effect on the size of burr.
Authors: Zhan Qu, Xiao Zeng Wang, Yi Hua Dou
Abstract: With the prolonged production term and the stimulation of the oil well in oil-field, the load which results from the in-situ stress is one of the main reasons to the casing damage. Taking the casing in Cementing section, the cement and the rock surrounding the cement into consideration, a mechanical model is established, while analytical solutions of displacement and stress distribution is obtained. The finite element method is adopted to obtain the numerical solutions of the mechanics model. The result shows that analytical solutions and finite element solutions are approximate. Finite element model of casing/cement/formation which is established in the paper can be used to analyze the load and stress distribution of worn casing with non-uniform in-situ stress.
Authors: Si Chen
Abstract: Fashion styles are closely related to their social and cultural background. Clothing is a product of materials and ideas. Clothing satisfies people physically and psychologically. Androgynous style is not a recent development; it was, is and will continue to be popular, which is special in fashion history. Androgynous style is prevailing currently. Despite its appearance, androgynous style is closely connected to social and cultural influences, for example, mass media, lifestyles and improvements in production methods in the clothing industry. In this paper, there is a deep examination of androgynous style, the significance of and reasons for its popularity with societies from the past up to today.
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