Composite material modular battery structure, device and preparation method

The invention discloses a composite material modular battery structure and device and a preparation method. The battery structure comprises a shell and a battery cell, the shell comprises a first wall plate, a second wall plate, a third wall plate, a fourth wall plate, an upper wall plate and a lower wall plate, the first wall plate and the second wall plate are correspondingly arranged, the third wall plate and the fourth wall plate are correspondingly arranged, the upper wall plate is sunken inwards to form a first groove, and three mounting holes are formed in the first groove; the lower wall plate is sunken inwards to form a second groove, and two mounting holes are formed in the second groove; the battery cell comprises a positive electrode plate, a negative electrode plate and a diaphragm, the diaphragm is arranged between the positive electrode plate and the negative electrode plate, and the positive electrode plate, the diaphragm and the negative electrode plate are laminated in an M shape to form the