Battery monomer, battery, power utilization device and protection structure

The utility model relates to a battery monomer, a battery, a power utilization device and a protection structure, an electrode assembly is coated with a protection main body, the protection main body protects the electrode assembly, and the protection main body and the electrode assembly are arranged in a shell together. As the guide piece is positioned on one side of the bottom surface of the electrode assembly and is obliquely arranged relative to the bottom surface before entering the shell, when entering the shell, the guide piece in an inclined state is preferentially contacted with the end part of the shell, and the electrode assembly and the protection main body are gradually guided into the shell by virtue of the inclined state of the guide piece, so that an effective guide effect is achieved; therefore, the electrode assembly can accurately enter the shell. Therefore, the probability of structural damage caused by influence of positioning deviation, cell manufacturing process size fluctuation and the