scholarly journals Multi-Scale Multi-Field Coupled Analysis of Power Battery Pack Based on Heat Pipe Cooling

Processes ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 696
Author(s):  
Ye Liu ◽  
Tao Jiang ◽  
Yanping Zheng ◽  
Jie Tian ◽  
Zheshu Ma
Keyword(s):  
Heat Pipe ◽  
Temperature Difference ◽  
Battery Pack ◽  
Dynamics Simulation ◽  
Maximum Temperature ◽  
Inlet Temperature ◽  
Multi Scale ◽  
Field Coupling ◽  
Air Inlet ◽  
Power Battery

Based on the study of the relationship between micro and macro parameters in the actual microstructure of the electrodes, a new multi-scale multi-field coupling model of battery monomer is established and the heat generation rate of the battery is obtained by detailed numerical simulation. According to the parameters of a certain electric vehicle and battery selected, the structure of the power battery pack and heat pipe cooling system is designed. Through multi-field coupling computational fluid dynamics simulation, the temperature difference of the battery pack is gained. By changing the fin spacing, the cooling scheme of the heat pipe is optimized, which ensures that the temperature difference is less than 5 K and the maximum temperature of the battery system is 306.26 K. It is found that increasing the discharge rate, the temperature difference increases rapidly. Increasing the air inlet velocity can improve the thermal uniformity of the battery pack, but changing the air inlet temperature only determines the range of temperature, it cannot improve the thermal uniformity. The method proposed and results gained can provide a reference for the research of heat management systems with heat pipe of lithium-ion power battery pack for vehicles.

scholarly journals Enhancement on the thermal behavior using heat pipe arrays in battery thermal management compared to cooper rods

2020 ◽  
Vol 24 (5 Part B) ◽  
pp. 3329-3336
Author(s):  
Chaoyi Wan
Keyword(s):  
Thermal Behavior ◽  
Heat Pipe ◽  
Thermal Management ◽  
Cooling System ◽  
Heat Pipes ◽  
Input Power ◽  
Maximum Temperature ◽  
Inlet Temperature ◽  
Battery Thermal Management ◽  
Power Battery

In the present study, the thermal behavior of a power battery cooling structure employing copper rods, and heat pipes was compared. The influences of flow rate and inlet temperature of coolant, as well as input power were discussed by numerical methods. The numerical computation results showed that heat pipe could significantly augment the heat transfer of the battery cooling system than the copper rod. Within the scope of this study, the heat pipe reduced the maximum temperature by 41.6-60.9%. The distributions of temperature ratios on the battery surface, together with the heat flux as soon as streamlines around the heat pipe condenser was also illustrated.

Performance Simulations of a Gas Turbine Disk-Blade Assembly Employing Miniature Radially Rotating Heat Pipes

2012 ◽  
Vol 134 (5) ◽  
Author(s):  
Yiding Cao ◽  
Jian Ling
Keyword(s):  
Heat Pipe ◽  
Numerical Investigation ◽  
Gas Turbines ◽  
Heat Pipes ◽  
Turbine Disk ◽  
Maximum Temperature ◽  
Material Strength ◽  
Inlet Temperature ◽  
Pipe Length ◽  
Blade Assembly

With a substantially increased gas inlet temperature in modern gas turbines, the cooling of turbine disks is becoming a challenging task. In order to reduce the temperature at the disk rim, a new turbine disk incorporating radially rotating heat pipes has been proposed. The objective of this paper is to conduct a numerical investigation for the cooling effectiveness of the rotating heat pipe. One of the major tasks of this paper is to compare the performance between a proposed disk-blade assembly incorporating radially rotating heat pipes and a conventional disk-blade assembly without the heat pipes under the same heating and cooling conditions. The numerical investigation illustrates that the turbine disk cooling technique incorporating radially rotating heat pipes is feasible. The maximum temperature at the rim of the proposed disk can be reduced by more than 100 °C in comparison with that of a conventional disk without heat pipes. However, the average temperature at the blade airfoil surface can be reduced by only about 10 °C. In addition, both the heat pipe length and diameter have an important effect on the turbine disk cooling. Under the permission of material strength, a longer heat pipe or a larger heat pipe diameter will produce a lower temperature at the disk rim.

scholarly journals Thermal Analysis and Improvements of the Power Battery Pack with Liquid Cooling for Electric Vehicles

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3045 ◽  
Author(s):  
Xia ◽  
Liu ◽  
Huang ◽  
Yang ◽  
Lai ◽  
...  
Keyword(s):  
Thermal Management ◽  
Electric Vehicles ◽  
Thermal Performance ◽  
Lithium Ion ◽  
Battery Pack ◽  
Maximum Temperature ◽  
Design Solution ◽  
Liquid Cooling ◽  
Power Battery ◽  
Reference Design

In order to ensure thermal safety and extended cycle life of Lithium-ion batteries (LIBs) used in electric vehicles (EVs), a typical thermal management scheme was proposed as a reference design for the power battery pack. Through the development of the model for theoretical analysis and numerical simulation combined with the thermal management test bench, the designed scheme could be evaluated. In particular, the three-dimensional transient thermal model was used as the type of model. The test result verified the accuracy and the rationality of the model, but it also showed that the reference design could not reach the qualified standard of thermal performance of the power battery pack. Based on the heat dissipation strategy of liquid cooling, a novel improved design solution was proposed. The results showed that the maximum temperature of the power battery pack dropped by 1 °C, and the temperature difference was reduced by 2 °C, which improved the thermal performance of the power battery pack and consequently provides guidance for the design of the battery thermal management system (BTMS).

scholarly journals Simulation Study on Liquid Cooling of Lithium-ion Battery Pack with a Novel Pipeline Structure

2021 ◽  
Vol 2125 (1) ◽  
pp. 012062
Author(s):  
Chao Lv ◽  
Tianyuan Xia ◽  
Hongxin Yin ◽  
Minghe Sun
Keyword(s):  
Lithium Ion Battery ◽  
Flow Rate ◽  
Temperature Difference ◽  
Heat Dissipation ◽  
Lithium Ion ◽  
Battery Pack ◽  
Maximum Temperature ◽  
Coolant Temperature ◽  
Temperature Uniformity ◽  
Liquid Cooling

Abstract Lithium-ion battery is widely used as the mainstream power source of electric vehicles owing to its high specific energy and low self-discharge rate. However, the performance of the lithium-ion battery is largely hindered by its heat dissipation issue. In this paper, lithium-ion battery pack with main channel and multi-branch channel based on liquid cooling sys-tem is studied. Further, numerical simulation was used to analyze the effects of coolant temperature and flow rate on cooling performance. Based on the original pipeline structure, a new pipeline structure was proposed in the present work. The results show that increasing the cool-ant flow rate not only reduces the maximum temperature of the battery pack, but also reduces the temperature difference. Lowering the coolant temperature could largely decrease the maximum temperature of the battery pack, but it tends to widen the temperature difference and worsen the temperature uniformity. Up-on comparison, maximum temperature is found to be decreased by 0.44K, whereas, the temperature difference of the battery decreased and the temperature uniformity is improved.

Numerical Simulation of Oscillating Heat Pipe Heat Exchanger

2010 ◽  
Vol 6 (1) ◽  
Author(s):  
Benyin Chai ◽  
Min Shao ◽  
Xuanyou Li ◽  
Shenjie Zhou ◽  
Yongchun Shi
Keyword(s):  
Numerical Simulation ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Heat Pipe ◽  
High Efficiency ◽  
Inlet Temperature ◽  
Oscillating Heat Pipe ◽  
Air Inlet ◽  
Hot Air ◽  
Pipe Heat

Oscillating heat pipe is a new type high efficiency heat-transfer element. Its development and design attract increasing attention. This paper describes a numerical simulation for investigating on the flow and heat exchange performance of an oscillating heat pipe heat exchanger. The influences of the arrangement of heat pipe, the inlet temperature and the flux of hot air were explored. The results show that the heat exchange of staggered arrangement is more efficient than the aligned one. The influence of temperature difference on the heat exchanger by hot air flux is more than hot air inlet temperature.

CFD Analysis of Scramjet Combustor with Non-Premixed Turbulence Model Using Ramp Injector

2014 ◽  
Vol 555 ◽  
pp. 18-25 ◽  
Author(s):  
Krishna Murari Pandey ◽  
Sukanta Roga
Keyword(s):  
Supersonic Combustion ◽  
Maximum Temperature ◽  
Combustion Model ◽  
Inlet Temperature ◽  
Reacting Flow ◽  
Complete Combustion ◽  
Scramjet Combustor ◽  
Air Inlet ◽  
Fuel Jet ◽  
Combustion Of Hydrogen

This paper presents the supersonic combustion of hydrogen using strut injector along with two-dimensional turbulent non-premixed combustion model with air inlet temperature of 750 0k and vitiated Mach number of 2. In this process, a PDF approach is created and this method needs solution to a high dimensional PDF transport equation. As the combustion of hydrogen fuel is injected from the strut injector, it is successfully used to model the turbulent reacting flow field. It is observed from the present work that, the maximum temperature of 2096 0k occurred in the recirculation area which is produced due to shock wave-expansion and the fuel jet losses concentration and after passing successively through such areas, temperature decreased slightly along the axis. From the maximum mass fraction of OH, it is observed that there is very little amount of OH around 0.0017 were found out after combustion. By providing strut injector, expansion wave is created which causes the proper mixing between the fuel and air that results in complete combustion.

scholarly journals Thermal Simulation of Power Lithium-ion Battery Module

2021 ◽  
Vol 233 ◽  
pp. 01028
Author(s):  
Fancong Zeng ◽  
Zhijiang Zuo ◽  
Han Li ◽  
Libo Pan
Keyword(s):  
Temperature Distribution ◽  
Lithium Ion Battery ◽  
Thermal Management ◽  
Lithium Ion ◽  
Maximum Temperature ◽  
Inlet Temperature ◽  
Design And Optimization ◽  
Air Inlet ◽  
Cfd Method ◽  
Battery Module

Thermal management of power lithium-ion battery modules is very important to avoid thermal problems such as overheating and out of control, the study of thermal behavior of battery modules can provide guidance for the design and optimization of modules and thermal management. In this paper, a 3d thermal model of the power lithium-ion battery module is established based on STARCCM+ by using computational fluid dynamics (CFD) method, and a grid independence simulation test is used to determine the number of grids, the temperature distribution is analyzed under the condition of 1C charge current. The research results show that the internal temperature rises gradually with the charge going on, the temperature distribution of the cells is basically symmetrical. When the heat transfer coefficient is 5W/(m2⋅K) and the natural convective air inlet temperature is 300K, the module temperature uniformity is good. But because of the maximum temperature slightly higher than the temperature of thermal runaway, additional cooling methods need to be considered to cool the battery.

Experimental Investigation on the Feasibility of Heat Pipe-Based Thermal Management System to Prevent Thermal Runaway Propagation

2019 ◽  
Vol 16 (3) ◽  
Author(s):  
Shuoqi Wang ◽  
Languang Lu ◽  
Dongsheng Ren ◽  
Xuning Feng ◽  
Shang Gao ◽  
...  
Keyword(s):  
Heat Pipe ◽  
Thermal Management ◽  
Management System ◽  
Heat Dissipation ◽  
High Heat ◽  
Thermal Runaway ◽  
Battery Pack ◽  
Maximum Temperature ◽  
Safety Level ◽  
Thermal Management System

Thermal management system (TMS) plays an essential part in improving the safety and durability of the battery pack. Prior studies mainly focused on controlling the maximum temperature and temperature difference of the battery pack. Little attention has been paid to the influence of the TMS on thermal runaway (TR) prevention of battery packs. In this paper, a heat pipe-based thermal management system (HPTMS) is designed and investigated to illustrate both the capabilities of temperature controlling and TR propagation preventing. Good thermal performance could be achieved under discharge and charge cycles of both 2 C rate and 3 C rate while the equivalent heat dissipation coefficient of the HPTMS is calculated above 70 W/(m2·K). In the TR propagation test triggered by overcharge, the surface temperature of the battery adjacent to the overcharged cell can be controlled below 215 °C, the onset temperature of TR obtained by the adiabatic TR test of a single cell. Therefore, TR propagation is prevented due to the high heat dissipation of the HPTMS. To conclude, the proposed HPTMS is an effective solution for the battery pack to maintain the operating temperature and improve the safety level under abuse conditions.

Thermal Management System Design and Simulation of Battery Pack for Electric Vehicles

2014 ◽  
Vol 494-495 ◽  
pp. 100-103 ◽  
Author(s):  
Jian Wang ◽  
Xiao Ping Yang
Keyword(s):  
Thermal Management ◽  
Electric Vehicles ◽  
Battery Pack ◽  
High Rate ◽  
Thermal Dissipation ◽  
Maximum Temperature ◽  
Maximum Temperature Difference ◽  
Element Analysis ◽  
Power Battery ◽  
Temperature Equilibrium

Power battery pack under high-rate discharge conditions produces thermal aggregation phenomena. Generated heat during charging and discharging that distributes in battery pack affects performance of battery and so that shortens its life. So the battery pack thermal management is necessary to electric vehicles. In this paper, an ideal thermal management solution is put forward with a battery pack temperature equilibrium approach and a battery pack overall thermal dissipation structure by finite element analysis. Theoretical analysis result shows that the thermal management solution can effectively cool the battery pack to the ideal working temperature range 25~40°C and improve the battery pack temperature uniformity with the maximum temperature difference which is below 5°C, which enhance the cycle life of power battery pack for electric vehicle applications.

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