Cylindrical battery fixing support and hybrid battery thermal management method
A thermal management technology for cylindrical batteries and batteries, applied to secondary batteries, battery pack components, circuits, etc., can solve problems such as battery axial temperature differences, achieve weight reduction, reduce adverse effects, and improve temperature consistency Effect
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Embodiment 1
[0037] In order to further explain the active hybrid battery thermal management scheme, a thermal management structure of a battery is selected for description, such as figure 2 shown. It mainly includes a cylindrical battery 1, an upper fixing bracket 2, a lower fixing bracket 3, a gas jet tube 15, a liquid cooling unit 26, etc., wherein the liquid cooling unit 26 mainly includes a double-layer jacket 22 and a buckle 23. The liquid cooling unit 26 is divided into upper and lower parts. The double-layer jacket 22 can be made of aluminum, etc., and the buckle 23 can be made of rubber.
[0038] When the temperature of the battery is lower than a reasonable temperature range, the heat medium fluid medium enters from the inlet of each buckle 23 and flows out from the outlet of the buckle. For the liquid cooling unit on the upper side, the heat medium liquid medium enters the inner layer of the jacket from the bottom buckle and flows from bottom to top, passes through the top buc...
Embodiment 2
[0040] Such as image 3 As shown, Embodiment 2 is a fixed bracket with an airflow channel. The four corners of the fixing bracket are provided with through holes, and the through holes are provided with a number of airflow channels along the radial direction. Compared with the lithium-ion battery, the inner hole of the fixing bracket is larger, and there is a certain gap between them. When the inner diameters of the fixing brackets are 9.1mm, 9.2mm, 9.3mm and 9.4mm respectively, the lithium-ion battery thermal management unit is as follows: Figure 4 As shown, it can be seen that as the inner diameter of the fixing bracket gradually increases, the gap between the fixing bracket and the battery gradually increases. Under certain simplified conditions, the mass flow rate at the coolant inlet is 3×10 -4 kg / s and the air inlet flow rate is 3m / s, under the conventional fixed bracket, the inner diameter of the fixed bracket is 9.1mm (marked as hybrid thermal management-Case1), th...
Embodiment 3
[0042] Such as Figure 6 As shown, in order to increase the air jet impingement heat transfer convective heat transfer area, more throttle holes 27 can be opened in the circumferential direction of the inner diameter of the fixing bracket. The air inlets of the throttling holes are provided on the sides of the four corners of the fixed bracket, and the fixed bracket is provided with an airflow channel 28 inside. Two fixed bracket structures such as Figure 7 As shown, a fixed bracket arranges four rows of throttling holes along the circumference as shown in Figure 7 (a), a fixed bracket arranges eight rows of throttling holes along the circumferential direction, such as Figure 7 (b). Under the arrangement of four rows of throttle holes (marked as CaseA) and the arrangement of eight rows of throttle holes (marked as CaseB), the maximum temperature and The temperature difference curve is as Figure 8 As shown, it can be seen that with the increase of the number of throttl...
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