Combined lithium battery tab kneading method

A lithium battery and combined technology, which is applied to battery pack parts, circuits, electrical components, etc., can solve problems affecting tab welding, false welding or over-welding, and potential safety hazards, so as to reduce welding defect rate and improve flatness degree of effect

Inactive Publication Date: 2020-01-21
国轩新能源(庐江)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The flattening method of lithium battery tabs plays an important role in the battery manufacturing process; for all-tab batteries, the blank areas of the positive and negative electrodes are located at both ends of the battery. It performs tab welding; at present, the flattening method of all-tab batteries is generally ultrasonic kneading, but the flatness of the end surface of the ultrasonic kneading battery is insufficient, which affects the subsequent welding of the tabs, resulting in virtual welding or over-welding, causing safety hazards

Method used

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  • Combined lithium battery tab kneading method
  • Combined lithium battery tab kneading method
  • Combined lithium battery tab kneading method

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with specific embodiment:

[0025] Such as figure 1 The lithium battery 1, the blank foil of the positive electrode sheet and the blank foil of the negative electrode sheet of the lithium battery 1 are respectively used as the positive electrode conductive tab 2 and the negative electrode conductive tab 3 of the lithium battery 1, and the two conductive tabs are respectively located in the lithium battery. 1 at both ends.

[0026] In this embodiment, the combined flattening method of firstly ultrasonically flattening and then mechanically flattening is adopted for the conductive ears of the two ends of the lithium battery 1. Knead the negative pole flat.

[0027] Specifically, kneading mainly includes the following steps:

[0028] First, if figure 2 As shown, the ultrasonic kneading head 21 moves closer to the positive end of the lithium battery 1, and ultrasonically kneads the positive electrode ...

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Abstract

The invention relates to a combined lithium battery tab kneading method, which comprises the following steps: a positive conductive tab is ultrasonically kneaded to a fixed depth, and a negative conductive tab is not kneaded; the positive conductive tab subjected to ultrasonic kneading is mechanically leveled to a depth required by the process, and the negative conductive tab is not leveled; the negative conductive tab is ultrasonically kneaded to a certain depth; and the negative conductive tab subjected to ultrasonic kneading is mechanically leveled to a depth required by the process. According to the invention, the lithium battery tabs are kneaded in a combined manner through ultrasonic kneading and then mechanical leveling, so that the situation in which the end faces of the battery tabs are uneven due to the adoption of ultrasonic kneading only is avoided, the flatness of the end faces of the battery tabs is improved, and the welding reject ratio of the lithium battery tabs is reduced.

Description

technical field [0001] The invention relates to the field of lithium battery manufacturing, in particular to a combined flattening method of lithium battery tabs. Background technique [0002] The flattening method of lithium battery tabs plays an important role in the battery manufacturing process; for all-tab batteries, the blank areas of the positive and negative electrodes are located at both ends of the battery. It performs tab welding; at present, the flattening method of all-tab batteries is generally ultrasonic kneading, but the flatness of the end surface of the ultrasonic kneading battery is insufficient, which affects the subsequent welding of the tabs, resulting in virtual welding or over-welding, causing safety hazards. Contents of the invention [0003] The object of the present invention is to provide a combined flattening method of lithium battery tabs, which can improve the flatness of the end faces of battery tabs and reduce the rate of defective welding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26B21D1/00
CPCB21D1/00H01M50/531Y02E60/10
Inventor 马建欣赵肖媛代红进
Owner 国轩新能源(庐江)有限公司
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