在浸入式冷却中添加新型翅片的混合电池热管理系统

doi:10.11985/2022.04.012

摘要/Abstract

摘要：

为了有效地控制电池的最高温和温差，设计一种冷却系统，采用创新型的螺旋翅片，将其和浸入式冷却系统结合，在该系统下研究了翅片宽度、螺旋圈数、冷却介质流速对电池散热的影响。结果表明增加翅片宽度和螺旋圈数都可以使电池温度得到有效降低，翅片宽度从2 mm增加到8 mm时，电池的最高温下降了1.33 ℃。在此基础上继续讨论螺旋圈数的影响，当圈数从2 Q增加到8 Q时，电池的最高温下降了0.84 ℃。在翅片宽度为8 mm、螺旋圈数为6 Q时，继续研究冷却介质流速对电池温度的影响，当流速为0.064 m/s时，电池的最高温仅为28.64 ℃，当流速超过0.024 m/s时，电池的温差呈先上升后下降的趋势，且都小于5 ℃，压降范围为10.96~93.73 Pa。上述发现为油浸式电池冷却系统提供了更多见解，证明在系统中加入翅片可以有效降低电池的最高温和温差，为强化系统的传热设计提供了参考。

关键词: 锂离子电池, 热管理, 浸入式系统, 螺旋翅片

Abstract:

In order to effectively control the maximum temperature and temperature difference of the battery, a cooling system is designed, which adopts an innovative spiral fin and combines it with an immersion cooling system. The effects of fin width, spiral number and flow rate of cooling medium on battery heat dissipation are studied. The results show that the temperature of the battery can be effectively reduced by increasing the fin width and spiral number. When the fin width increases from 2 mm to 8 mm, the maximum temperature of the battery decreases by 1.33 ℃. On this basis, the influence of the number of helical turns is further discussed. When the number of helical turns increases from 2 Q to 8 Q, the maximum temperature of the battery decreases by 0.84 ℃. When the fin width is 8 mm and the spiral number is 6 Q, the influence of the flow rate of cooling medium on the temperature of the battery is further studied. When the flow rate is 0.064 m/s, the maximum temperature of the battery is only 28.64 ℃. When the flow rate is more than 0.024 m/s, the temperature difference of the battery increases first and then decreases, both of which are less than 5 ℃. The pressure drop range is 10.96-93.73 Pa. The above findings provide more insights into the cooling system of oil-immersed batteries, and prove that the addition of fins in the system can effectively reduce the maximum temperature difference between the battery and the temperature difference, which provides a reference for enhancing the heat transfer design of the system.

Key words: Lithium-ion battery, thermal management, immersion system, spiral fin

中图分类号:

TM912

刘家豪, 马晴雯. 在浸入式冷却中添加新型翅片的混合电池热管理系统[J]. 电气工程学报, 2022, 17(4): 113-121.

LIU Jiahao, MA Qingwen. Hybrid Battery Thermal Management System with New Fins Added to Immersion Cooling[J]. Journal of Electrical Engineering, 2022, 17(4): 113-121.

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特性	电池	铝合金	ABS	矿物油
尺寸/mm	38×120	—	—	—
密度ρ/(kg/m³)	2 700	2 719	1 215	1 098.72-0.712t
热容量c_p/[J/(kg·K)]	998	871	1 300	807.163+3.58t
导热系数λ/[W/(m·K)]	7	202.4	0.17	0.1509-7.101×10^-5t
动黏滞度µ/(Pa·s)	—	—	—	0.0846 7-0.000 4t+5×10^-7t²