Anode lug bending and sealing body press-in device for cylindrical lithium battery

Abstract

The invention discloses an anode lug bending and sealing body press-in device for a cylindrical lithium battery, which is characterized by comprising an anode lug bending mechanism and a press-in mechanism, wherein the press-in mechanism is positioned right above a sealing port to be pressed in; the anode lug bending mechanism comprises a limiting assembly and an ejecting and pressing rod; the limiting assembly is positioned at one side of an anode lug; the ejecting and pressing rod is positioned at the other side of the anode lug; the limiting assembly is provided with a space for accommodating the bent anode lug; the space is provided with an opening which is towards the anode lug; and in the bending process, the anode lug is ejected and pressed by the ejecting and pressing rod to generate bending deformation and the bent anode lug enters the space from the opening. The anode lug bending and sealing body press-in device for the cylindrical lithium battery has the advantages that the device has good controllability; after the anode lug is bent and the sealing body is pressed into a steel shell of the battery, the anode lug is generally of an S shape; the battery leakage phenomenon caused by the case the anode lug is clamped between the steel shell of the battery and a sealing ring is avoided; the anode lug has a good current collecting effect; discharge capacity of the lithium battery can be effectively ensured; and the produced lithium battery has good sealing performance.

Description

technical field [0001] The invention relates to an assembly device for a cylindrical lithium battery, in particular to a device for bending a positive tab of a cylindrical lithium battery and pressing a sealing body. Background technique [0002] The positive tab of the lithium battery is the current collector of the positive electrode of the battery. After welding with the battery sealing body, it is located under the sealing body. It needs to be bent in a certain shape and pressed into the battery steel case together with the sealing body. Inside the seal ring, the seal ring sits on top of the steel case of the battery. [0003] There are two main methods of bending the positive tab of the lithium battery and pressing the sealing body into the steel case of the battery: one is manual bending and manual pressing of the sealing body. This method has poor controllability and low efficiency. ; The second is to use one side bending method, which will easily cause the tabs to b...

AI Technical Summary

Problems solved by technology

[0003] There are two main methods of bending the positive tab of the lithium battery and pressing the sealing body into the steel case of the battery: one is manual bending and manual pressing of the sealing body. This method has poor controllability and low efficiency. ; The second is to use one side bending method, which will easily cause the tabs to be stuck between the steel shell of the battery and the sealing ring, making the steel shell of the battery poorly sealed, resulting in battery leakage

Therefore, the current way of bending the positive tab of the lithium battery and pressing the sealing body into the steel case of the battery is poor in controllability and low in efficiency. The current collecting effect of the tabs is not good, which reduces the discharge capacity of the lithium battery; at the same time, it is easy to cause direct contact between the sealing body and the steel shell of the battery. Once the lug is stuck into the sealing ring, it will cause damage to the sealing ring and the sealing body, reduce the sealing performance of the battery steel case, and easily lead to the consequences of battery leakage

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