Multiplexed Voltage Measurement for Serial Connected Power Li-Ion Battery String

2015 ◽  
Vol 742 ◽  
pp. 229-233
Author(s):  
Lin Yang Liu ◽  
Han Xin Shen ◽  
Wen Zhang Zhu
Keyword(s):  
Lithium Battery ◽  
High Accuracy ◽  
Measurement Precision ◽  
Li Ion Battery ◽  
Simple Circuit ◽  
Measurement Circuit ◽  
Voltage Measurement ◽  
Temperature Drift ◽  
Factors Affecting ◽  
Li Ion

This paper proposes a new method of multiplexed voltage measurement for serial connected power lithium battery string. The method has some advantages such as simple circuit, the simultaneous measurement and high accuracy. The principle of the voltage measurement circuit is analyzed in this paper, and proposes the solution to the factors affecting the measurement precision of the circuit. Experiments show that this circuit leakage current and temperature drift is small, and also have high precision.

A facile and fast electrochemical route to produce functional few-layer graphene sheets for lithium battery anode application

2014 ◽  
Vol 2 (37) ◽  
pp. 15298-15302 ◽  
Author(s):  
Farid Ouhib ◽  
Abdelhafid Aqil ◽  
Jean-Michel Thomassin ◽  
Cédric Malherbe ◽  
Bernard Gilbert ◽  
...  
Keyword(s):  
Lithium Battery ◽  
Simple Approach ◽  
Graphene Sheets ◽  
Functionalized Graphene ◽  
Li Ion Battery ◽  
Layer Graphene ◽  
Li Ion ◽  
Few Layer Graphene ◽  
Battery Anode

We report a simple approach for the production of polymer functionalized graphene for Li-ion battery anodes.

Research of Li-Ion Battery’s Equalizer Circuit Based on TL431

2014 ◽  
Vol 651-653 ◽  
pp. 1056-1059
Author(s):  
Hao Ming Zhang ◽  
Hong Li ◽  
Lian Soon Peh
Keyword(s):  
System Performance ◽  
Lithium Battery ◽  
Li Ion Battery ◽  
Discharge Time ◽  
Large Power ◽  
Power Battery ◽  
New Type ◽  
Li Ion ◽  
The Difference ◽  
Lower Voltage

Li-ion battery, as a new type of energy storage equipment, has small size, large power density, high individual voltage, low rate of self-discharging and small self-resistance etc. It substitutes the traditional power battery in AGV.In practical process, due to the difference of battery cells, after a period of charge-discharge time, the upper and lower voltage limits of every unit of batteries become various, seriously affecting the system performance. The idea of upper and lower equalizer is released for this case. Then, a further research is made on the equalizer circuit of li-ion battery. The experiment result proves the correctness of design on several types of lithium battery equalizer circuit.

scholarly journals A High Efficiency Li-Ion Battery LDO-Based Charger for Portable Application

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Youssef Ziadi ◽  
Hassan Qjidaa
Keyword(s):  
High Efficiency ◽  
Cmos Technology ◽  
High Accuracy ◽  
Constant Current ◽  
Li Ion Battery ◽  
Constant Voltage ◽  
Battery Charger ◽  
Charging Current ◽  
Li Ion ◽  
Simulation Results

This paper presents a high efficiency Li-ion battery LDO-based charger IC which adopted a three-mode control: trickle constant current, fast constant current, and constant voltage modes. The criteria of the proposed Li-ion battery charger, including high accuracy, high efficiency, and low size area, are of high importance. The simulation results provide the trickle current of 116 mA, maximum charging current of 448 mA, and charging voltage of 4.21 V at the power supply of 4.8–5 V, using 0.18 μm CMOS technology.

Design of Intelligent Li-Ion Battery Charger

2013 ◽  
Vol 303-306 ◽  
pp. 1878-1882
Author(s):  
Ye Li ◽  
He Chen
Keyword(s):  
Lithium Battery ◽  
Pulse Width Modulation ◽  
Li Ion Battery ◽  
Battery Charger ◽  
Charging System ◽  
Charging Time ◽  
Fast Charging ◽  
Modulation Signal ◽  
Li Ion ◽  
Current Detection

To achieve fast charging of lithium battery, based on MSP430 microcontroller, an intelligent Li-ion battery charging system was designed with voltage and current detection function. By collecting voltage and current values and making judgment on charging states of batteries, Pulse Width Modulation signal (PWM) was adjusted to realize high-precision charging control. The unit modules and their driving software flow chart were presented. The experiment results show that the charging system takes only 1 hour for a lithium battery to be charged. The system is faster than ordinary chargers which need 2-3 hours to finish charging. So the charging system shortens the charging time effectively.

Online DC Voltage Measurement by Using DC-to-DC Converters

2011 ◽  
Vol 211-212 ◽  
pp. 97-101
Author(s):  
Jin Long Ni ◽  
An Ding Zhu
Keyword(s):  
High Stability ◽  
Supply Voltage ◽  
Input Voltage ◽  
High Accuracy ◽  
Lead Acid Battery ◽  
Measurement Circuit ◽  
Voltage Measurement ◽  
Dc Voltage ◽  
Terminal Voltage ◽  
Accuracy Of Measurement

In order to measure the terminal voltage of a lead-acid battery online, a DC-to-DC converter – MC34063 is used to convert the D.C. input voltage to the supply voltage of measurement circuit. A three-terminal adjustable regulator of TL431A is used to generate a standard reference voltage for the A/D converter of the Microchip MCU – PIC16F873A. This D.C. voltage meter takes advantage of high accuracy of measurement and high stability.

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