Effects of Size of Microchannels on Thermo-Electrical Performance of an Internally Cooled Li-Ion Battery Cell

2016 ◽  
Vol 13 (4) ◽  
Author(s):  
Shahabeddin K. Mohammadian ◽  
Yuwen Zhang
Keyword(s):  
Electrical Performance ◽  
Maximum Temperature ◽  
Width Ratio ◽  
Inlet Temperature ◽  
Internal Cooling ◽  
Temperature Uniformity ◽  
Li Ion Battery ◽  
Electrolyte Flow ◽  
Battery Cell ◽  
Li Ion

Thermal management of Li-ion batteries utilizing internal cooling method is the promising way to keep these batteries in an appropriate temperature range and to improve the temperature uniformity. In this study, three-dimensional transient thermal analysis was carried out to investigate the effects of size of embedded microchannels inside the electrodes on the thermal and electrical performances of a Li-ion battery cell. Based on the ratio of the width of microchannels to the width of the cell, different cases were designed; from the ratio of 0 (without any microchannels) to the ratio of 0.5. The results showed that increasing the size of the microchannels from the width ratio of 0 to the width ratio of 0.5 can reduce the maximum temperature inside the battery cell up to 11.22 K; it can also improve the temperature uniformity inside the battery cell. Increasing the electrolyte flow inlet temperature from 288.15 K to 308.15 K can enhance the temperature uniformity inside the battery and the cell voltage up to 33.20% and 2.79%, respectively. Increasing the electrolyte flow inlet velocity from 1 cm/s to 10 cm/s can reduce the maximum temperature inside the battery cell up to 8.09 K.

Thermoelectric Effects of Size of Microchannels on an Internally Cooled Li-Ion Battery Cell

2016 ◽  
Author(s):  
Shahabeddin K. Mohammadian ◽  
Yuwen Zhang
Keyword(s):  
Cell Voltage ◽  
Maximum Temperature ◽  
Width Ratio ◽  
Inlet Temperature ◽  
Temperature Uniformity ◽  
Thermoelectric Effects ◽  
Electrolyte Flow ◽  
Battery Cell ◽  
Internally Cooled ◽  
Li Ion

Thermoelectric effects of size of microchannels on an internally cooled Li-ion battery cell is investigated in this paper. The liquid electrolyte was flowed as the coolant through rectangular microchannels embedded in the positive and negative electrodes. The effects of size of microchannels on the thermal and electrical performances of a Li-ion (Lithium-ion) battery cell were studied by carrying out 3D transient thermal analysis. Six different cases were designed according to the ratio of the width of the microchannels to the width of the cell from 0 to 0.5. The effects of inlet velocity of electrolyte flow, inlet temperature of electrolyte flow, and size of the microchannels were studied on the temperature uniformity inside the battery cell, maximum temperature inside the battery cell, and cell voltage. The results showed that increasing the size of the microchannels enhances the thermal performance of the battery cell; however, it causes slight decrease on the cell voltage (less than 2%). Comparison between the case with width ratio of 0.5 (Case 6) with the case without microchannel (Case 1) showed that this internal cooling method can decrease the maximum temperature of the battery up to 11.22K, 9.36K, and 7.86K for the inlet temperature of electrolyte flow of 288.15K, 298.15K, and 308.15K, respectively. Furthermore, the case with width ratio of 0.5 (Case 6) has up to 77% better temperature uniformity compare with the case with width ratio of 0.1 (Case 2). Increasing the inlet temperature of electrolyte flow enhances the temperature uniformity up to 33% and increases the cell voltage up to 3%, but it keeps the battery on higher temperatures. Furthermore, increasing the inlet velocity of electrolyte flow from 0.01m/s to 0.01m/s enhances the thermal management of the battery cell by decreasing the temperature inside the battery up to 8.09K, 6.75K, and 5.67K for the inlet temperature of electrolyte flow of 288.15K, 298.15K, and 308.15K respectively. Furthermore, it improves the temperature uniformity up to 89% and decreases the voltage less than 1%.

scholarly journals Transient Thermal Analysis of a Li-Ion Battery Module for Electric Cars Based on Various Cooling Fan Arrangements

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2387
Author(s):  
Van-Thanh Ho ◽  
Kyoungsik Chang ◽  
Sang Wook Lee ◽  
Sung Han Kim
Keyword(s):  
Temperature Difference ◽  
Cooling System ◽  
Maximum Temperature ◽  
Clear Understanding ◽  
Li Ion Battery ◽  
Discharge Condition ◽  
Battery Cell ◽  
Electric Cars ◽  
Li Ion ◽  
Battery Module

This paper presents a three-dimensional modeling approach to simulate the thermal performance of a Li-ion battery module for a new urban car. A single-battery cell and a 52.3 Ah Li-ion battery module were considered, and a Newman, Tiedemann, Gu, and Kim (NTGK) model was adopted for the electrochemical modeling based on input parameters from the discharge experiment. A thermal–electrochemical coupled method was established to provide insight into the temperature variations over time under various discharge conditions. The distribution temperature of a single-battery cell was predicted accurately. Additionally, in a 5C discharge condition without a cooling system, the temperature of the battery module reached 114 °C, and the temperature difference increased to 25 °C under a 5C discharging condition. This condition led to the activation of thermal runaway and the possibility of an explosion. However, the application of a reasonable fan circulation and position reduced the maximum temperature to 49.7 °C under the 5C discharge condition. Moreover, accurate prediction of the temperature difference between cell areas during operation allowed for a clear understanding and design of an appropriate fan system.

Real-Time Estimation of Lithium-Ion Concentration in Both Electrodes of a Lithium-Ion Battery Cell Utilizing Electrochemical–Thermal Coupling

2017 ◽  
Vol 139 (3) ◽  
Author(s):  
Satadru Dey ◽  
Beshah Ayalew
Keyword(s):  
Real Time ◽  
Unscented Kalman Filter ◽  
Lithium Ion ◽  
Time Estimation ◽  
Li Ion Battery ◽  
Battery Cell ◽  
Thermal Dynamics ◽  
Estimation Scheme ◽  
Real Time Estimation ◽  
Li Ion

This paper proposes and demonstrates an estimation scheme for Li-ion concentrations in both electrodes of a Li-ion battery cell. The well-known observability deficiencies in the two-electrode electrochemical models of Li-ion battery cells are first overcome by extending them with a thermal evolution model. Essentially, coupling of electrochemical–thermal dynamics emerging from the fact that the lithium concentrations contribute to the entropic heat generation is utilized to overcome the observability issue. Then, an estimation scheme comprised of a cascade of a sliding-mode observer and an unscented Kalman filter (UKF) is constructed that exploits the resulting structure of the coupled model. The approach gives new real-time estimation capabilities for two often-sought pieces of information about a battery cell: (1) estimation of cell-capacity and (2) tracking the capacity loss due to degradation mechanisms such as lithium plating. These capabilities are possible since the two-electrode model needs not be reduced further to a single-electrode model by adding Li conservation assumptions, which do not hold with long-term operation. Simulation studies are included for the validation of the proposed scheme. Effect of measurement noise and parametric uncertainties is also included in the simulation results to evaluate the performance of the proposed scheme.

Development of the Li-ion Battery Cell for Hybrid Vehicle

2016 ◽  
Author(s):  
Hiroki Nagai ◽  
Masahiro Morita ◽  
Koichi Satoh
Keyword(s):  
Hybrid Vehicle ◽  
Li Ion Battery ◽  
Battery Cell ◽  
Li Ion

A New Methodology for Evaluating the High-Power Behavior of a Li-Ion Battery Cell

2019 ◽  
Vol 25 (36) ◽  
pp. 253-262 ◽  
Author(s):  
Andreas Nyman ◽  
Tommy G. Zavalis ◽  
Ragna Elger ◽  
Maårten Behm ◽  
Göran Lindbergh
Keyword(s):  
High Power ◽  
Li Ion Battery ◽  
Battery Cell ◽  
Li Ion

scholarly journals Investigation of Electrochemical, Thermal and Electrical Performance of 3D Lithium-Ion Battery Module in a High -Temperature Environment

2020 ◽  
Vol 9 (2) ◽  
pp. 151-157
Author(s):  
Snigdha Sharma ◽  
Amrish Kumar Panwar ◽  
Madan Mohan Tripathi
Keyword(s):  
Thermal Properties ◽  
Lithium Ion Battery ◽  
Simulation Study ◽  
Lithium Ion ◽  
Open Circuit ◽  
Electrical Performance ◽  
Li Ion Battery ◽  
Peak Voltage ◽  
Simulation And Optimization ◽  
Li Ion

In the present time, the rechargeable lithium-ion battery is being commercialized to meet the sustained market’s demands. To design a more reliable, safe, and efficient Li-ion battery, a 3-D simulation study has been presented in this paper. In this study, a lithium-ion coin-cell is proposed which has LiFePO4 as a positive electrode with a thickness of 1.76 µm, carbon as a negative electrode with a thickness of 2.50 µm and Celgard 2400 polypropylene sheet as a separator between the electrodes with a thickness of 2 µm. The proposed Li-ion battery has been designed, analyzed, and optimized with the help of Multiphysics software. The simulation study has been performed to analyze the electrochemical properties such as cyclic voltammetry (CV) and impedance spectroscopy (EIS). Moreover, the electrical and thermal properties at the microscopic level are investigated and optimized in terms of surface potential distribution, the concentration of electrolyte, open circuit, and surface temperature with respect to time. It has been noticed that the peak voltage, 3.45 V is observed as the temperature distribution on the surface varies from 0 OC to 80 OC at a microscopic scale with different C-rates. The analysis of simulation results indicates a smoother electrode surface with uniform electrical and thermal properties distribution resulting in improved reliability of the battery. The performed simulation and optimization are helpful to achieve control over battery performance and safe usage without any degradation of the environment.©2020. CBIORE-IJRED. All rights reserved.

Heat generation in high power prismatic Li-ion battery cell with LiMnNiCoO2cathode material

2014 ◽  
Vol 38 (11) ◽  
pp. 1424-1437 ◽  
Author(s):  
Yasir Abdul-Quadir ◽  
Tomi Laurila ◽  
Juha Karppinen ◽  
Kirsi Jalkanen ◽  
Kai Vuorilehto ◽  
...  
Keyword(s):  
Heat Generation ◽  
High Power ◽  
Li Ion Battery ◽  
Battery Cell ◽  
Li Ion

Experimental and Simulation Studies of Thermal Distribution on Modified Connector of Li-Ion Battery for Electric Vehicles Application

2016 ◽  
Vol 6 (5) ◽  
pp. 2064
Author(s):  
Agus Risdiyanto ◽  
Umar Khayam ◽  
Noviadi A. Rachman ◽  
Maulana Arifin
Keyword(s):  
Contact Resistance ◽  
Contact Area ◽  
Fire Hazard ◽  
Lithium Ion ◽  
Maximum Temperature ◽  
Silver Coating ◽  
Li Ion Battery ◽  
Steady State Condition ◽  
Li Ion ◽  
Dc Current

<p>One of the several failure cases in electric vehicle could be occured at the Lithium-ion (Li-ion) battery connectors when loaded by high current. This failure caused by bad contact of connectors so that the contact resistance increase and lead to high power losses, overheating, and it can even cause a fire hazard. This paper presents a thermal distributions of  Li-ion battery connectors on different coating material in relation to the value of contact resistance. There were two test samples of modeled: copper connection without coating and copper connection with silver coating. Each sample was loaded by the DC current of 350A, and temperature at the connection was measured until steady state condition reached and simulated by Solidwork software. The results show that the temperature at the inside contact area was higher than the outside contact area of connection that appears caused by higher of the contact resistance. Both measurement and simulation results have same tendency that copper connection with silver coating having lower contact resistance, lower maximum temperature, and lower losses about 32 % than copper connection without  coating. Silver coating can be considered as other alternative to prevent overheating, high losses, and failure in Li-ion battery connector.</p>

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