Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
The effect of heat barrier layer of cold plate on the heat dissipation uniformity of li battery modules
| DOI: | 10.11809/bqzbgcxb2024.09.015 |
| Keywords: | cold plate heat barrier layer; temperature consistency; liquid cooling plate; numerical simulation; lithium battery module |
| Abstract: | The large temperature difference between lithium battery modules leads to inconsistent charging, discharging, and aging rates between batteries, resulting in poor performance. In order to further reduce the working temperature difference of lithium battery modules, a new type of cold plate with a thermal barrier layer is proposed, which increases thermal resistance by adding a thermal barrier layer between the cooling liquid inlet of the cold plate and the lithium battery, suppresses heat exchange between the lithium battery and the cold plate, and improves its heat dissipation uniformity. The lithium ion battery module discharging with 3C cooled by these new type cold plate was simulated. Three cold plates with different flow channels, including parallel flow channels, parallel serpentine flow channels, and forked flow channels, were analyzed. The effect of adding a heat barrier layer to the cold plate on the uniformity of discharge heat dissipation of lithium ion battery module, as well as the influence of the thermal conductivity, thickness, and coverage area of the heat barrier layer on the uniformity of cooling and heat dissipation of lithium ion battery module were analyzed. The results show that adding a heat barrier layer can effectively reduce the working temperature difference of lithium battery modules for the three different cold plates. As the thermal conductivity of the thermal barrier material decreases, the maximum temperature and temperature difference of the lithium battery module first decrease and then increase. As the thickness and coverage area of the thermal barrier layer increase, the maximum operating temperature and temperature difference of the lithium battery module first decrease and then increase. Using a thermal conductive silicone pad with a length of 80 mm, width of 80 mm, and thickness of 1 mm, the lithium battery module is cooled by a bifurcated channel cold plate with a 3C discharge temperature and temperature difference reduced to 306.55 K and 4.89 K.ξ |
| Published: | 2024-09-30 |