scholarly journals PSO-based optimization for constant-current charging pattern for li-ion battery

2019 ◽  
Vol 5 (2) ◽  
pp. 72-78 ◽  
Author(s):  
Yixiao Wang ◽  
Yong Li ◽  
Li Jiang ◽  
Yuduo Huang ◽  
Yijia Cao
Keyword(s):  
Constant Current ◽  
Li Ion Battery ◽  
Li Ion ◽  
Constant Current Charging

Optimization of multi-stage constant current charging pattern based on Taguchi method for Li-Ion battery

2020 ◽  
Vol 259 ◽  
pp. 114148 ◽  
Author(s):  
Li Jiang ◽  
Yong Li ◽  
Yuduo Huang ◽  
Jiaqi Yu ◽  
Xuebo Qiao ◽  
...  
Keyword(s):  
Taguchi Method ◽  
Constant Current ◽  
Li Ion Battery ◽  
Multi Stage ◽  
Li Ion ◽  
Constant Current Charging

THE DESIGN OF A LI-ION BATTERY CHARGER BASED ON MULTIMODE LDO TECHNOLOGY

2009 ◽  
Vol 18 (05) ◽  
pp. 947-963 ◽  
Author(s):  
CHIA-CHUN TSAI ◽  
CHIN-YEN LIN ◽  
YUH-SHYAN HWANG ◽  
TRONG-YEN LEE
Keyword(s):  
Power Efficiency ◽  
Input Voltage ◽  
Constant Current ◽  
Voltage Regulator ◽  
Cmos Process ◽  
Li Ion Battery ◽  
Battery Charger ◽  
Charging Current ◽  
Li Ion ◽  
A Current

In this paper, we design a CMOS Li-Ion battery charger using the multimode low dropout (LDO) voltage regulator associated with a current sense to supply trickle current, constant current, and constant voltage for charging the battery in order. The protections from over charging and discharging are also considered by monitoring the charging current, reverse voltage, and battery temperature. The whole charger has been verified by HSPICE with TSMC 0.35 μm 2P4M CMOS process. The charger provides the trickle current of 150 mA, maximum charging current of 312 mA, and charging voltage of 4.2 V at the input voltage of 4.5 V. The power efficiency of 72.3% is acceptable under the power consumption of 1.28 W. The chip occupies an area of 1.78 mm × 1.77 mm including 2955 transistors.

scholarly journals Establishment of transition point in operating mode for Constant Current Constant Voltage (CC-CV) charging of Li-ion batteries

2021 ◽  
Vol 3 (1) ◽  
pp. 072-083
Author(s):  
Amit Kumar De ◽  
Shobhana Dey
Keyword(s):  
Transition Point ◽  
Operating Mode ◽  
Constant Current ◽  
Li Ion Batteries ◽  
Constant Voltage ◽  
Long Run ◽  
Charging Mode ◽  
Li Ion ◽  
Constant Current Charging ◽  
Safety Considerations

The present-day Li-ion batteries when operated, needs precise monitoring of the charging voltage. Several charging techniques have been tested so far with varying degrees of success. One of the most widely used charging techniques is the CC-CV (constant current constant voltage) charging. When performing this, the safety considerations must be maintained with respect to over voltage charging which is a very common problem during constant current charging. In order to prevent over voltage charging, the charging mode must be then shifted from CC to CV mode. So, this transition point of the charging mode from CC to CV is very crucial for the safe operation and health of the battery in the long run. The problem is that, this transition point doesn’t remain the same for the battery. So, in this paper the factors on which it depends are discussed and a Li-ion battery was charged in a few different charging rates using the CC-CV technique to demonstrate the process.

Fabrication and Characterization of Nanocrystalline NiO Prepared by Sol-Gel Process

2011 ◽  
Vol 194-196 ◽  
pp. 476-479
Author(s):  
Yu Cai ◽  
Zhao Yang Wu ◽  
Shen Li Zhao ◽  
Ji Ne Zhu
Keyword(s):  
Crystal Structure ◽  
Sol Gel ◽  
Chelating Agent ◽  
Constant Current ◽  
Treatment Technology ◽  
Sol Gel Process ◽  
Stable Performance ◽  
Li Ion ◽  
Constant Current Charging

The nano-NiO powder was prepared by sol-gel method combining heat treatment technology and its structure and morphology were explored. In addition, the NiO powder electrochemical properties were tested by constant current charging and discharging. The results show that the stable performance sol can be composed by nickel acetate as source of nickel and PAA as chelating agent. Nano-NiO powder of crystal structure integrity, particle uniformity can be prepared by the sol. The gel decomposes completely and gradually forms nanocrystal at 430οC. Its grain size is gradually increasing when the annealing temperature rise. The nano-NiO powder sintered at 600°C exhibits uniform particle, integrity crystal structure, low aggregation and superior electrochemistry performance and may be used in Li-ion battery as the anode material.

A Formation System of Large-Capacity Power Li-Ion Battery

2013 ◽  
Vol 446-447 ◽  
pp. 796-801
Author(s):  
Lai Jie Wu ◽  
Liang Huang ◽  
Bin Ma ◽  
Xue Bing Li
Keyword(s):  
Large Scale ◽  
Current Control ◽  
Constant Current ◽  
Li Ion Battery ◽  
Large Capacity ◽  
Working Principle ◽  
Li Ion ◽  
High Control ◽  
Upper Computer ◽  
Formation System

This paper designed a large-capacity Li-ion battery formation system, and illustrated its composition and working principle. The formation system uses a programmable voltage-limiting and constant-current control circuit with voltage-limiting protection function to prevent Li-ion battery over-charge and over-discharge. The system consists of a upper computer (server) and a number of lower computers (formation units) linked with 485 bus. The server can monitor formation process and record formation data in real-time. By testing, the system has good characteristics, such as large charge and discharge current, high control accuracy, multiple-step programming, etc., and it can meet the needs of a large-scale power Li-ion battery formation.

scholarly journals A new high speed charge and high efficiency Li-Ion battery charger interface using pulse control technique

2022 ◽  
Vol 12 (2) ◽  
pp. 1168
Author(s):  
Mustapha El Alaoui ◽  
Karim El Khadiri ◽  
Rachid El Alami ◽  
Ahmed Tahiri ◽  
Ahmed Lakhssassi ◽  
...  
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Control Technique ◽  
Constant Current ◽  
Li Ion Battery ◽  
Pulse Control ◽  
Battery Charger ◽  
Small Surface ◽  
Charging Mode ◽  
Li Ion

A new Li-Ion battery charger interface (BCI) using pulse control (PC) technique is designed and analyzed in this paper. Thanks to the use of PC technique, the main standards of the Li-Ion battery charger, i.e. fast charge, small surface area and high efficiency, are achieved. The proposed charger achieves full charge in forty-one minutes passing by the constant current (CC) charging mode which also included the start-up and the constant voltage mode (CV) charging mode. It designed, simulated and layouted which occupies a small size area 0.1 mm2 by using Taiwan Semiconductor Manufacturing Company 180 nm complementary metal oxide semi-conductor technology (TSMC 180 nm CMOS) technology in Cadence Virtuoso software. The battery voltage VBAT varies between 2.9 V to 4.35 V and the maximum battery current IBAT is 2.1 A in CC charging mode, according to a maximum input voltage VIN equal 5 V. The maximum charging efficiency reaches 98%.

Li-ion battery shut-off at high temperature caused by polymer phase separation in responsive electrolytes

2015 ◽  
Vol 51 (25) ◽  
pp. 5448-5451 ◽  
Author(s):  
Jesse C. Kelly ◽  
Nicholas L. Degrood ◽  
Mark E. Roberts
Keyword(s):  
Phase Separation ◽  
High Temperature ◽  
Constant Current ◽  
Li Ion Battery ◽  
Polymer Phase ◽  
Discharge Characteristics ◽  
Current Discharge ◽  
Thermally Responsive ◽  
Li Ion

Schematic of LTO/LFP battery with a thermally responsive electrolyte. The constant current discharge characteristics are shown at low and high temperature. The insets show the phase of the polymer in the cell at each temperature.

Effects of Mg2+ Doping on Performance of Anode Material Li4Ti5O12

2013 ◽  
Vol 779-780 ◽  
pp. 307-310
Author(s):  
Neng Wei Wang ◽  
Zai Chun Huang ◽  
Xu Mei Cui ◽  
Zhao Yu Wu
Keyword(s):  
Anode Material ◽  
Room Temperature ◽  
Lithium Titanate ◽  
Raw Material ◽  
Constant Current ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
X Ray ◽  
Li Ion ◽  
Scanning Electron

Anode material Li4Ti5O12 was prepared by the method of solid-state reaction at high temperature. In the experiment, it was utilized by undoping and a small amount of Mg2+ doping with raw material respectively. The morphology of powder was observed by scanning electron microscopy (SEM), the phase analysis was done by X-ray diffraction analysis (XRD), and the charging and discharging tests with constant current were also carried out at room temperature. The results showed that little effect was on the particle size by a small amount of Mg2+ doping, the change of the structure of the powder material was not caused, but the conductivity of Li4Ti5O12 anode material was increased, the capacity and stability of the charging and discharging cycles were raised. It fully proved that Mg2+ doping was relatively effective. Keywords: Li-ion battery;lithium titanate (Li4Ti5O12); doping;charging and discharging.

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