Design and parametric optimization of thermal management of lithium-ion battery module with reciprocating air-flow

Summary Due to the requirement of the battery for the thermal management system, based on the coupling relationship between the velocity field and the thermal flow field of the field synergy principle, the flow paths of the forced air cooling system for different battery packs were analyzed. First, the thermodynamic parameters of the battery were collected through experiments and verified by simulation. Secondly, based on the collected thermodynamic parameters of the battery, the heat generation model of the battery, the heat conduction model of the gas, and the coupled heat dissipation model of the battery and air were established. Determine the boundary conditions, calculation methods and evaluation indicators required for simulation; Finally, based on four different driving conditions, the forced air cooling performance of the double “U” shape duct and double “1” type duct is simulated. Through the analysis of the results, the dual “U” air ducts have a more heat dissipation effect on the battery pack than the double “1” shape duct. The results conform to the definition of the field synergy principle for the coupling relationship between the velocity field and the heat flow field. Then research provide references for the design of battery packs and matching of cooling systems.

Section: Numerical Computation Methodologymentioning

confidence: 99%

“…Applying the standard model is currently the main method to solve the flow and heat transfer. 21,22 The equation is also called the turbulent pulsation kinetic equation:…”

Section: Battery Heat Generation Modelmentioning

confidence: 99%

The forced air cooling heat dissipation performance of different battery pack bottom duct

Tang

et al. 2018

“…The flow of coolant in the liquid‐cooled plate can be considered incompressible flow. Considering the high liquid flow rate and the separation phenomenon caused by the complex flow channel, it should be processed according to the turbulent model and iterated by the SIMPLE pressure correction method . The method uses a multistep correction method to coordinate the temperature field and the velocity field, and takes into account the influence of the correction value of the adjacent point on the calculated point velocity correction value to ensure that the algorithm has better convergence.…”

Section: Numerical Computation Methodologymentioning

confidence: 99%

Heat dissipation analysis of double-layer battery pack under coupling heat transfer of air, liquid, and solid

Zhao

Zhu

et al. 2018

Summary Due to the sensitivity of the electrochemical performance of lithium‐ion batteries to temperature, the thermal management system becomes an essential component of pure electric vehicles. This paper selects a liquid‐cooled double‐layer battery pack for a certain car as the research object, determines the heating power of the battery cell through experiments, considers the existence of air domain in the battery pack to establish a battery pack thermal management system model, and analyzes the effects of different discharge rates, inlet flow rates, and inlet flow directions on the thermal performance of the double‐layer battery pack. The results show that the temperature of the upper module of the double‐layer battery pack is higher than that of the lower module at the same discharge rates and inlet flow rate; the maximum temperature of the upper module can be effectively reduced by increasing the liquid intake flow of the upper module. When the inlet flow rate of the upper module and the lower module is 550 and 500 L/hour respectively, the temperature distribution difference between the upper and lower modules of the double‐layer battery pack is the smallest, and the heat dissipation performance of the battery pack is the better. The conclusion can provide reference for structural design and optimization of thermal management system of the liquid‐cooled double‐layer battery pack.

“…Applying the standard model is currently the main method to solve the flow and heat transfer. 26,27 The equation is also called the turbulent pulsation kinetic equation:…”

Section: Mathematical Modelmentioning

confidence: 99%

Battery module thermal management based on liquid cold plate with heat transfer enhanced fin

2019

Summary Battery, as the main energy storage element, directly affects the performance of electric vehicle. Battery thermal management research is required as the battery performance influenced by temperature obviously. This article selects liquid cold plate with different heat transfer enhanced fins as the research object. The angle and length of fins are chosen as the variables. Computational fluid dynamics (CFD) methods and experiments are used in this research. The fin angle of 15°, 30°, and 45° and fin length of 8, 10, 12 mm are selected to compose enhanced fins. The results indicate that heat transfer fins inside liquid cold plate can significantly decrease the highest temperature of battery module and temperature difference among cells. Otherwise, different fin angle and fin length can achieve different heat dissipation performance, which is not positive correlation. Then the design reference of heat transfer enhanced fin in liquid cold plate is offered.