Cylindrical lithium battery sealing mold

Abstract

The invention discloses a cylindrical lithium battery sealing mold. The cylindrical lithium battery sealing opening mold comprises three upper sealing molds and one lower sealing mold, wherein each upper sealing opening mold comprises a connecting part and a fixed sleeve; the upper sealing molds are provided with through mold holes which penetrate through the whole upper sealing molds; the through holes comprise a first step hole, a second step hole and a third step hole; the first step hole comprises a first turning edge and a second turning edge which are formed when the outer surface of the fixed sleeve is concave inward; the first turning edge is a straight edge and the second turning edge is a 1 / 4 circular edge. According to the cylindrical lithium battery sealing opening mold, sealing is finished through three steps; the lower sealing mold is matched with the first upper sealing mold so that the sealing opening is bent to form a round edge with the radius of 1.9mm; then the lower sealing opening mold is matched with the second upper sealing opening mold so that the sealing opening is bent to form a round edge with the radius of 1.3mm; finally, the lower sealing opening mold is matched with the third upper sealing opening mold so that the sealing opening is bent to form a round edge with the radius of 0.7mm, so that the sealing opening is finished; the sealing opening is finished through the three steps, so that the sealing opening has good sealing property and high yield and the sealing opening has a smooth and beautiful appearance.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a cylindrical lithium battery sealing mold. Background technique [0002] Lithium batteries refer to batteries containing lithium (including metal lithium, lithium alloys, lithium ions, and lithium polymers) in the electrochemical system. Lithium batteries can be roughly divided into lithium metal batteries and lithium ion batteries. Among them, a lithium metal battery is a type of battery that uses lithium alloy or lithium metal as the negative electrode material and uses a non-aqueous electrolyte solution, and is usually not rechargeable. Lithium-ion batteries are generally made of lithium alloy metal oxide as the positive electrode material, graphite as the negative electrode material, and a battery using a non-aqueous electrolyte. Lithium-ion batteries do not contain metallic lithium and are rechargeable. [0003] Since lithium-ion batteries do not contain any prec...

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Problems solved by technology

[0005] At present, in the production of cylindrical batteries, batteries with poor appearance such as pinching and stepping often occur in the sealing process, and the sealing upper mold is easily damaged and needs to be remade. However, the production of the sealing upper mold is time-consuming and laborious, and the pass rate of production molding is low. It can't guarantee the quality very well, which will eventually affect the appearance of the battery and affect the qualified rate of battery sealing.

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