A direct refrigerant battery cooling system is proposed in this study in order to derive an approach to face the rising energy density and solve the thermal dissipation of batteries during the fast-charge or over-charge process. A novel honeycomb shaped single-sided roll-bond aluminum sheet was designed and introduced under a power battery to serve as a cooling plate. Refrigerant is boiled in the novel channel and the latent heat of vaporization is utilized to satisfy the thermal management demand of the power battery in the direct refrigerant battery cooling system. A silicon rubber heating board was used to simulate the thermal demand of the power battery module according to the state of charge data of the power battery. An experimental bench was built to test the performance of the system under the environmental temperature of the UDDS condition. The experimental results show that the system can respond to the thermal management requirements quickly in approximately 150 seconds under the maximum heat generation

i.e.

6 kW

which shows fast response characteristics. The average temperature of the surface of the cooling plates can be controlled between the appropriate temperature range of 15 to 20 ℃ and meet the temperature uniformity requirement of 4 ℃ under the given conditions. At the same time

the COP of the system is above 2.8 under the given conditions.