scholarly journals The Research on Characteristics of Li-NiMnCo Lithium-Ion Batteries in Electric Vehicles

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Sujuan Chen ◽  
Zhendong Zhao ◽  
Xinyan Gu
Keyword(s):  
Lithium Ion Batteries ◽  
Electric Vehicles ◽  
Lithium Batteries ◽  
Lithium Ion ◽  
Constant Current ◽  
Battery Voltage ◽  
Discharge Characteristics ◽  
Characteristic Curves ◽  
Different Types ◽  
Charge Discharge

The energy density of canode materials for lithium-ion batteries has a major impact on the driving range of electric vehicles. In order to study the charge-discharge characteristics and application feasibility of Li-NiMnCo lithium-ion batteries for vehicles, a series of charge and discharge experiments were carried out with different rates of Li-NiMnCo lithium-ion batteries (the ratio of nickel, cobalt, and manganese was 5 : 2 : 3) in constant-current-constant-voltage mode. Firstly, a set of charge-discharge experiments were performed on different types of single-cell lithium-ion batteries. The results show that, under temperature conditions, the charge and discharge voltage-capacity curves of the four different types of Li-NiMnCo lithium batteries mentioned in the paper are not much different, and the charge-discharge characteristic curves are similar, indicating that different types of batteries with the same material composition have similar charge and discharge characteristics. Subsequently, a series of charge and discharge tests with different rates were conducted on such ternary lithium batteries. The characteristic curves with different charge-discharge rates indicate that this new type of ternary lithium battery has high current charge and discharge capability and is suitable for use in new energy electric vehicles. In addition, by analyzing the voltage-SOC curve under different magnification conditions, it is known that there is an approximate linear relationship between the battery voltage value and the SOC within a certain SOC range. The SOC value can be evaluated by the battery voltage, which should be controlled within a reasonable range to avoid overcharge or overdischarge of battery, thereby, causing permanent damage to the battery.

Measurement and Prediction of Decomposed Energy Efficiencies of Lithium Ion Batteries With Two Charge Models

2021 ◽  
Vol 18 (3) ◽  
Author(s):  
Yuhao Huang ◽  
Yan Su ◽  
Akhil Garg
Keyword(s):  
Lithium Ion Batteries ◽  
Open Circuit Voltage ◽  
Prediction Method ◽  
Lithium Ion ◽  
Open Circuit ◽  
Constant Current ◽  
New Process ◽  
Artificial Neural Network Ann ◽  
Cv Model ◽  
Charge Discharge

Abstract A new process decomposed calculation method is developed to compare the cycle based charge, discharge, net, and overall energy efficiencies of lithium-ion batteries. Multi-cycle measurements for both constant current (CC) and constant current to constant voltage (CC-CV) charge models have been performed. Unlike most conventional efficiency calculation methods with one mean open-circuit voltage (OCV) curve, two OCV curves are calculated separately for the charge and discharge processes. These two OCV curves help to clarify the intra-cycle charge, discharge, net, and overall energy efficiencies. The relationships of efficiencies versus state of charge, state of quantity, and scaled stresses are demonstrated. Efficiency degradation patterns versus cycle numbers and scaled stresses are also illustrated with the artificial neural network (ANN) prediction method. The decaying ratios of the overall efficiencies are about 2% and 0.3% in the first 30 cycles, for CC and CC-CV, respectively. Hence, efficiencies of the CC-CV model are more stable compared with the CC model, which are shown by both experimental and ANN prediction results.

scholarly journals Твердотельный литий-ионный аккумулятор: структура, технология и характеристики

2020 ◽  
Vol 46 (5) ◽  
pp. 15
Author(s):  
А.С. Рудый ◽  
А.А. Мироненко ◽  
В.В. Наумов ◽  
А.М. Скундин ◽  
Т.Л. Кулова ◽  
...  
Keyword(s):  
Thin Film ◽  
Solid State ◽  
Fermi Level ◽  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Test Results ◽  
Lithium Ions ◽  
Discharge Characteristics ◽  
Charge Discharge

The design description and test results of an all solid-state thin-film lithium-ion battery are provided. It is shown that the features of its charge-discharge characteristics are associated with a change in the Fermi level of the electrodes and are caused by a change in the concentration of lithium ions in the course of the charge-discharge. The specific capacitive characteristics of the layout are determined, which are comparable with the characteristics of industrial solid-state lithium-ion batteries.

scholarly journals The Effect of Ratio LiBOB:TiO2 of Electrolyte Polymer Sheets as separators on the Electrochemical Performance of LTO-Based Lithium-Ion Batteries

2019 ◽  
Vol 22 (4) ◽  
pp. 136-142
Author(s):  
Agriccia Pangestica Saputry ◽  
Titik Lestariningsih ◽  
Yayuk Astuti
Keyword(s):  
Lithium Ion Batteries ◽  
Work Stress ◽  
Lithium Batteries ◽  
Electrochemical Impedance ◽  
Lithium Ion ◽  
Electrolyte Solutions ◽  
Battery Voltage ◽  
Battery Cell ◽  
Polymer Sheets ◽  
Eis Analysis

LTO anode-based Ion-Lithium batteries with artificial polymer electrolyte sheets consisting of PVdF-HFP, TiO2, and LiBOB as well as commercial sheets and with electrolyte solutions LiTFSI and LiPF6 have been made by assembling method. The changing variables in this study were the ratio between TiO2 and LiBOB for separator sheets and types of electrolytes used, namely, LiTFSI and LiPF6. Some characterizations were undertaken to determine battery performance including battery voltage determination, Cyclic Voltammetry (CV) testing to measure battery cell performance, and Electrochemical Impedance Spectrometry (EIS) analysis to measure battery conductivity values. The results showed that the presence of LiBOB and TiO2 at the separator in the battery can improve the performance of LTO-based lithium batteries. Artificial separator sheets with a composition ratio of TiO2: LiBOB of 5:25 with electrolyte solution LiPF6 which produces work stress, potential difference, and ionic conductivity of 3.06 V; 0.3 V; and 1.486x10-6 Scm-1 is the best possible to be applied to lithium-ion batteries.

Synthesis of Carbons Added LiFePO4 Powders by Two-Fluid Nozzle Spray Pyrolysis and Measurement the Charge-Discharge Properties

2013 ◽  
Vol 582 ◽  
pp. 123-126
Author(s):  
Takahiro Nakamura ◽  
Takayuki Kodera ◽  
Ryoma Minami ◽  
Takashi Ogihara
Keyword(s):  
Lithium Ion Batteries ◽  
Spray Pyrolysis ◽  
Active Material ◽  
Ultrasonic Spray Pyrolysis ◽  
Lithium Ion ◽  
Carbon Powder ◽  
Ultrasonic Spray ◽  
Different Types ◽  
Two Fluid ◽  
Charge Discharge

LiFePO4/C powders were synthesized by ultrasonic spray pyrolysis using carbon powder instead of organic substances as the carbon source. LiFePO4 (LFP) powders containing different types of carbon powders were prepared and used as cathode active materials in lithium ion batteries. The charge-discharge properties of lithium ion batteries with LFP, LFP/AB, and LFP/CNT powders as the cathode material were worse than those of the battery with LFP/sucrose powder as the cathode active material.

Study on the Lithium-Ion Batteries Performance of Electric Vehicles

2014 ◽  
Vol 986-987 ◽  
pp. 1869-1872 ◽  
Author(s):  
Jun Min Lu ◽  
Xiao Kan Wang
Keyword(s):  
Lithium Ion Batteries ◽  
Electric Vehicle ◽  
Electric Vehicles ◽  
Lithium Batteries ◽  
Lithium Ion ◽  
Technical Support ◽  
Discharge Performance ◽  
Lead Acid Batteries ◽  
Comprehensive Comparison ◽  
Lead Acid

By comprehensive analyzing the lead-acid batteries development situation of electric vehicle at first, and making a comprehensive comparison for the performances and features of the lead-acid batteries, nickel hydrogen batteries and lithium-ion batteries, then studying the charge and discharge performance of the lithium batteries which provides technical support and references for the application and popularization of lithium-ion batteries in electric vehicles.

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