Printed circuit board fixing structure for battery pack, battery pack and electric automobile

The utility model relates to a printed circuit board fixing structure for a battery pack, the battery pack and an electric automobile. The printed circuit board fixing structure comprises a substrate, the substrate is provided with a first side face and a second side face which extend in the length direction of the substrate and are opposite to each other, the first side face is suitable for being fixed to a printed circuit board of the battery pack, and the second side face is suitable for being fixed to a battery cell of the battery pack. The lower end part of the substrate is also provided with an extension part which vertically extends outwards by a preset height from the first side surface, and the preset height is greater than the thickness of the printed circuit board. According to the printed circuit board fixing structure for the battery pack, the printed circuit board can be fixed to the side of a battery cell in the battery pack so as to collect the voltage and temperature of the battery cell. When