A novel lithium Fe battery and its making technology

Abstract

The invention relates to a novel lithium-iron battery and the manufacture process thereof, and belongs to the field of batteries. A septum is arranged between an anode and a cathode, and the outermost ring of a pole assembly is of the anode. The cathode is packed inside the pole assembly. The anode is characterized in that the both sides of a metal ribbon material basal body are overlaid with active materials, one section of the metal basal body is not overlaid along an axis, and the length without overlay is 1-25percent of the length of the metal basal body. One side without overlay of the basal body at the end of the anode is directly contacted with a shell. A cathode liquid collecting body is welded with a nut cap, and an opening is sealed to form molding. The invention has simple process, reduced welding working procedure of the anode and easy control and operation. An anode liquid collecting body is directly contacted with the shell, and the safe hidden trouble caused by the elevation of the temperature at the inner part of the lithium-iron battery is reduced. The direct contact area of the anode and the shell is increased; the electrical conductivity is strengthened; the dosage of the cathode is reduced; the safe hidden trouble caused by the incomplete reaction of the cathode is avoided.

Description

technical field [0001] The invention discloses a novel lithium-iron battery and a manufacturing process thereof, belonging to the field of batteries, and in particular relates to a manufacturing process of a lithium-iron battery. Background technique [0002] The positive electrode sheet of the lithium-iron battery is welded to the upper cover through the welded tab, and the surface of the negative electrode is welded to the bottom of the casing after the tab is glued. Not only does it need to be welded many times, but the lugs welded on the positive electrode sheet are generally made of nickel-plated steel, stainless iron and other materials, which have problems such as corrosion at the welding place and weak spot welding; in addition, when welding the bottom of the negative electrode tab, it is necessary Spot welding at the bottom of the battery may easily cause problems such as internal short circuit or micro short circuit of the battery. In addition, conventional lithiu...

AI Technical Summary

Problems solved by technology

After the battery is fully discharged, the lithium negative electrode in the outermost ring fails to react because there is no positive electrode corresponding to it, and there is a surplus, which is not conducive to battery safety.

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