It was shown that for the ambient and initial cell temperature of −30°C, a single heating system based on MHPA could heat the battery pack to 0°C in 20 min, with a uniform temperature distribution in the battery pack, a maximum temperature difference of less than 3.03°C, and a good temperature rise rate.
Temperature distribution in battery thermal management systems under different cold plate structures are researched. Effects of key operating parameters on battery thermal management system are analysed. A new stereoscopic cooling plate structure is put forward. Influences of new cooling plate structure on battery thermal management are clarified.
Despite progress in reducing maximum battery pack temperature and improving thermal uniformity, effectively enhancing heat dissipation, and minimizing coolant pressure drop in the thermal management system of Li-ion battery packs under harsh high-temperature conditions remains a challenge.
The placement strategies of traditional straight-channel cooling plates significantly affect the temperature distribution of the battery pack. When compared with the BCP design, multi-cooling plates result in reduced coolant flow rates in each plate, leading to less effective thermal management of the battery pack.
Under the BCP design, the temperature of the battery pack gradually increases along the coolant flow direction. As the cooling plate is positioned at the bottom of the battery pack, localized overheating occurs at the top of the battery pack on the outlet side of the cooling plate.
Pulsating heat pipes have low thermal resistance and high thermal conductivity, and they can respond quickly at high heat fluxes. Chen’s team utilized a nanofluid to mix nanoparticles with a traditional work mass (e.g., ethanol) as a new work mass and used the pulsating heat pipe to heat the power battery.