Experimental investigation on an integrated thermal management system with heat pipe heat exchanger for electric vehicle

Abstract

13An integrated thermal management system combining a heat pipe battery 14 cooling/preheating system with the heat pump air conditioning system is presented to 15 fulfill the comprehensive energy utilization for electric vehicles. A test bench with 16 battery heat pipe heat exchanger (HPHE) and heat pump air conditioning for a regular 17 five-chair electric car is set up to research the performance of this integrated system 18 under different working conditions. The investigation results show that as the system 19 is designed to meet the basic cabinet cooling demand, the additional parallel branch of 20 battery chiller is a good way to solve the battery group cooling problem, which can 21 supply about 20% additional cooling capacity without input power increase. Its 22 coefficient of performance( COP) for cabinet heating is around 1.34 at -20℃ out-car 23 temperature and 20℃ in-car temperature. The specific heat of the battery group is 24 tested about 1.24 kJ/kg•℃. There exists a necessary temperature condition for the 25 HPHE to start action. The heat pipe heat transfer performance is around 0.87 W/℃ 26 on cooling mode and 1.11 W/℃ on preheating mode. The gravity role makes the heat 27 transfer performance of the heat pipe on preheating mode better than that on cooling 28 mode. 29 30

Experimental investigation on mini-channel cooling-based thermal management for Li-ion battery module under different cooling schemes

“…The thermal management of Li-ion batteries remains a crucial and challenging topic. 4,5 The performance of Li-ion batteries is closely related to the operating temperature. Low temperature reduces the battery capacity, while high temperature shortens cycle life and leads to degradation, or even thermal runaway.…”

“…However, there are many problems in the application of Li‐ion batteries. The thermal management of Li‐ion batteries remains a crucial and challenging topic . The performance of Li‐ion batteries is closely related to the operating temperature.…”

A review on battery management system from the modeling efforts to its multiapplication and integration

“…Because the mechanism and process of two phase flow in heat pipe are complex to model, studies are primarily based on experiment. Zou et al developed an integrated thermal management structure that incorporates a heat pipe type BTMS with an air‐conditioning system to fulfill the comprehensive heat domination for EVs. Notably, some researchers have also proposed new BTMSs, such as jet cooling and boiling cooling .…”

Advances in Integrated Vehicle Thermal Management and Numerical Simulation

“…Thus, it is necessary to conduct thermal management for battery cooling/pre-heating [87] with consideration of the number of cells, geometry and vehicle mass distribution [88]. It is generally wellknown that considering the different cooling media, the battery thermal management (BTM) approaches can be summarized as follows: air cooling, liquid cooling, heat pipes and PCM cooling [89][90][91][92][93][94]. Different BTM methods each have their limitations and merits [93].…”