The invention discloses a preparation method of an
electric bicycle battery, which overcomes the problems that in the prior art, a working
voltage platform of a
lithium manganate battery is high, the
voltage of the battery drops quickly under a low charge state, and an
electric bicycle is instantly powered off, and comprises the following steps of mixing a
solvent, a
lithium iron phosphate main material, a conductive agent and a binder according to a certain
mass ratio to form
slurry A, mixing a
solvent, a
lithium manganate main material, a conductive agent and a binder according to a certain
mass ratio to form
slurry B, uniformly mixing the
slurry A and the slurry B according to a certain
mass ratio,
coating a
current collector with the mixture, and then performing
drying, rolling and
die cutting, winding or laminating the manufactured
pole piece, and carrying out tab
welding, top side sealing, baking and
liquid injection to obtain a
battery cell, performing high-temperature pressurization formation on the finished
battery cell, and carrying out vacuumizing sealing, capacity grading and group matching on the formed
battery cell. The high temperature of lithium
manganate is improved, the battery performance is improved, and meanwhile, the situation that an
electric vehicle is suddenly powered off under low SOC and
low voltage is improved.