This creation provides a fireproof cover applied to a battery. The battery includes a positive electrode and a negative electrode. A fireproof cover is provided on the positive electrode of the battery, and a fireproof material is provided inside the fireproof cover. When the battery is damaged, fire is emitted from the positive electrode. During a fire, the fireproof material in the fireproof cover will expand by heat and generate a carbon dioxide. The carbon dioxide generated by the fireproof material is used to extinguish the fire.本創作提供一種應用於電池上的防火罩，電池包括一正極及一負極，一防火罩設置在電池的正極上，且防火罩的內部設置有一防火材料，當電池受損而從正極處發出燃火時，防火罩中的防火材料將會受熱膨脹且產生一二氧化碳，利用防火材料產生的二氧化碳來滅掉燃火。
