scholarly journals Contactless power transfer system for sealed lead acid battery charging

2017 ◽  
Vol 5 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Gautam Rituraj ◽  
Brijesh Kumar Kushwaha ◽  
Praveen Kumar
Keyword(s):  
Constant Current ◽  
Optimum Operating ◽  
Transfer System ◽  
Control Parameters ◽  
Power Transfer ◽  
Constant Voltage ◽  
Lead Acid Battery ◽  
Battery Bank ◽  
Contactless Power Transfer ◽  
Lead Acid

In this paper, an experimental study is carried out while charging the sealed lead acid battery bank using a series-parallel (SP) compensated contactless power transfer (CPT) system. Constant current (CC) and constant voltage (CV) modes are used for charging the battery bank. An expression of optimum operating frequency is derived to maintain the maximum compensated coil efficiency throughout the load variation in charging process. An experimental setup of SP compensated CPT system is built for charging the battery bank. The variation of compensated coil efficiency and the load phase angle with respect to different operating frequencies in CC and CV modes is verified with the measurement. Based on the analysis, the control parameters are identified.

scholarly journals A Heterogeneous Inductive Power Transfer System for Electric Vehicles with Spontaneous Constant Current and Constant Voltage Output Features

Electronics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1978
Author(s):  
Jing Zhou ◽  
Pengzhi Yao ◽  
Kan Guo ◽  
Pengju Cao ◽  
Yao Zhang ◽  
...  
Keyword(s):  
Coupling Coefficient ◽  
Characteristic Curve ◽  
Load Resistance ◽  
Transmission Efficiency ◽  
Constant Current ◽  
Transfer System ◽  
Power Transfer ◽  
Constant Voltage ◽  
Loosely Coupled ◽  
Voltage Output

An inductively coupled wireless power transfer system is proposed in this paper, which is designed to comply with the battery’s load characteristics. A loosely coupled transformer with high coupling coefficient is proposed. A heterogeneous compensation topology is proposed which is able to switch between constant current and constant voltage output mode according to the load resistance. The output characteristic curve agrees with the charging curve of the battery in a whole cycle. The proposed topology has a misalignment range of 300 mm where the coupling coefficient is 0.2. A 3 kW experimental platform is established to verify the theoretical analysis, and the experimental results show that the proposed loosely coupled transformer has high coupling coefficient and high power transmission efficiency (95.2% in aligned position) within a large misalignment range, which agrees with the charging scenario of the electric vehicle.

Fast Charging Lead-Acid Battery Technology Theory Analysis

2014 ◽  
Vol 1070-1072 ◽  
pp. 525-529
Author(s):  
Kuang Cheng Li ◽  
Zheng Liu ◽  
Ya Long Liu ◽  
Yan Liu
Keyword(s):  
Raw Materials ◽  
Pulse Discharge ◽  
Active Material ◽  
Constant Current ◽  
Constant Voltage ◽  
Lead Acid Battery ◽  
Current Limit ◽  
Fast Charging ◽  
Battery Technology ◽  
Lead Acid

Lead-acid battery has perfect characteristics, such as good performance, rich raw materials and low prices, it plays an important role as starting power and auxiliary power in vehicles, Because of inadequate understanding internal active material in physical or chemistry reaction in charging process or technical conditions of limit ,the charging methods mainly contents the constant voltage ,constant voltage the current limit, constant current .These methods fail to damages such as overcharging ,short-charging, gas chromatography and high electrolyte temperature. So, this paper analyzes concentration polarization and electrochemical polarization in fast charging based on the MAS theorems. However, pulse discharge technology can change the concentration of ions near the electrode, which speeds up the electrochemical reaction rate and increase the energy into the chemical energy efficiency.

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