The invention discloses a bitter agent
coating for preventing mistaken eating of a button
cell and a preparation method thereof, the bitter agent
coating is prepared from a
solvent, a food-grade thickener, a bitter agent, an
electrolyte and a coloring agent, and the bitter agent
coating is dispensed on the surface of a negative
electrode of the button
cell in a dispersed dotted form to form array distribution. The point-like discrete array point coating mode avoids the
contact position of the central
electrode of the negative
electrode of the battery, so that the influence of the electrical insulation characteristic of the coating on the
discharge performance of the battery during use can be avoided, and meanwhile, the coating of the high-bitterness coating is facilitated. The discrete
dot array bitter agent coating on the surface of the battery can be quickly dissolved and release a large amount of
bitter taste after being in contact with
saliva, and the coloring agent can leave marks on the lips and other parts of children. When a child mistakenly eats the button
cell containing the coating, the child can feel strong bitterness stimulation and actively spits the button cell, so that the
swallowing behavior of the child is stopped, and the trace left by the coloring agent can be convenient for a guardian to timely perceive the mistaken
eating behavior of the child.