This paper focus on the direct cooling plate with serpentine flow channels, the
effects of heat load power, compressor speed, fan speed, and types of heating
plates on the temperature field of the cold plate were investigated respectively
based on the direct cooling thermal management system.The experimental results
show that as the heating power decreases, both the overall temperature and
temperature difference of the cold plate decrease synchronously. The temperature
distribution along the flow channel is non-monotonic, with the highest
temperature at the first elbow (T2/T3) and the lowest temperature at the outlet
(T12), which is lower than the inlet temperature.A study on the T4-T11 region
reveals that when the fan speed is low, with the increase of compressor speed,
both Tmax and Tmin first decrease and then increase, while ΔT decreases. When
the fan speed is constant at medium or high levels, as the compressor speed
increases from low to medium, Tmax and Tmin decrease and ΔT also decreases; when
the compressor speed increases from medium to high, Tmax and Tmin remain
basically unchanged, while ΔT continues to decrease.The PID automatic control
strategy was introduced to adjust the rotational speed, and a comparison was
made between the silicone heating plate and the metal heating plate. The results
indicate that the heating uniformity of the silicone heating plate is better
than that of the metal heating plate. Moreover, when the compressor operates at
approximately 60% load and the fan operates at around 30%~40% load, this working
condition can not only effectively cool the battery to maintain its temperature
within the range of 15°C~20°C in most cases but also control the temperature
difference in the T4-T11 region within 5.5°C. Under such operating conditions,
the system exhibits excellent cooling performance and temperature
uniformity.