Battery, electric equipment and preparation method thereof

The invention discloses a battery, electric equipment and a preparation method of the battery. The battery comprises a shell, and a first end cover and a second end cover are arranged at the two opposite ends of the shell respectively; the battery cell assembly is packaged in the shell, the battery cell assembly comprises more than two battery cell monomers which are mutually stacked, and each battery cell monomer is provided with a first tab and a second tab which are opposite to each other; wherein at the first end of the battery cell assembly, the first tabs of the battery cell monomers are respectively connected with the first pole columns of the first end cover before the battery cell assembly is inserted into the shell; and at the second end of the battery cell assembly, the second tab of each battery cell monomer is used for being connected with the second pole of the second end cover after the battery cell assembly is inserted into the shell. According to the scheme, the volume energy density of the b