电动汽车电池冷板微小通道结构优化研究

为对车用电池微小通道冷板结构进行优化,探究冷板流道中流场和温度场的相互作用机理,本文中首先采用正交试验得到了冷板整体的最优布局。使用面向中心的中心复合设计响应面法(FCCCD)研究发现,当波纹通道振幅为1 mm、周期数为4时,波纹通道的综合热力水力性能达到最大,相对平直通道的增幅为17.4%。CFD分析表明,场协同角和通道努塞尔数一致的变化规律证明了场协同理论可以用于解释微小通道内的强化换热。波纹通道曲率的存在导致的流道内的对流混乱大大增强了流体的混合,并破坏了剪切层。该剪切层在流道内分离了主体流和再循环流,因而导致了传热的增强。

Research on Microchannel Structure Optimization ofElectric Vehicle Battery Cold Plate

In order to optimize the structure of the cold plate of the micro channel of the vehicle battery and explore the interaction mechanism between the flow field and the temperature field in the cold plate flow channel,the optimal layout of the cold plate is first obtained using orthogonal experiments in this paper.By using the Face-Centered Central Composite Design(FCCCD),it is found that when the wavy channel amplitude is 1 mm and the number of cycles is 4,the overall thermal-hydraulic performance of the wavy channel reaches the maximum,which increases by 17.4%compared to the straight channel.According to CFD analysis,the consistency of the field synergy angle and the channel Nusselt number proves that the field synergy angle theory can be used to explain the enhanced heat transfer in the micro channel.The chaotic advection in the flow channel caused by the curvature of the wavy channel greatly enhances the convective fluid mixing and destroys the shear layer,which separates the main flow and the recirculating flow in the channel,resulting in a heat transfer enhancement.