Power battery pack of automobile start-stop system

The invention relates to a power battery pack of an automobile start-stop system, comprising a box body and a battery pack arranged in the box body. The box body is provided with a plug connector. A box cover in screw fit with the box body is arranged on the upper end of the box body. The battery pack includes an electrical core component, a tray and a relay. The box body is provided with a fixingdevice inside. The electrical core component and the relay are connected with the fixing device by screws. The tray is fixed at the upper end of the electrical core component. The box cover is provided with gaps matching the positive and negative poles of the battery pack. The electrical core component is provided with insulating end plates at the two ends thereof, and the electrical core component is provided with heat conducting silica gel pads on the other two sides and at the bottom thereof. The types of materials are reduced, and cost is saved. The power battery pack has the advantages of more simple and compact