Lithium battery and tab cutting device

A lithium battery, cutting technology, applied in the manufacture of lithium batteries, non-aqueous electrolyte batteries, electrolyte batteries, etc., can solve the problems of affecting battery safety performance, easy to puncture, etc., achieve smooth transition, avoid the effect of safety performance

Active Publication Date: 2015-11-25
SHENZHEN GEESUN INTELLIGENT TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the corners of the tabs 111 are sharp, the sharp corners of the tabs 111 of the cells 11 are easy to pierce the diaphragms of other cells during the subsequent production process and storage and transportation of the cells 11, thereby affecting the safety performance of the cells

Method used

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  • Lithium battery and tab cutting device
  • Lithium battery and tab cutting device
  • Lithium battery and tab cutting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Please refer to Figure 2-4 , In the first embodiment, the lithium battery tab cutting device includes a machine base 1, a cylinder 2, an upper mold base 3, a lower mold base 4, an upper knife mold 5, a lower knife mold 6, and a mold base connecting plate 7.

[0034] The air cylinder 2 is installed on the machine base 1, and the air cylinder 2 drives the upper mold base 3 and the upper knife mold 5 to move back and forth on a cutting path as a power mechanism. The power output end 21 of the cylinder 2 is fixedly connected with the upper mold base 3, and the fixed connection includes a direct fixed connection and an indirect fixed connection. In the first embodiment, the upper mold base 3 is fixedly connected to the power output end 21 of the cylinder 2 through the mold base connecting plate 7. Specifically, please refer to figure 2 , the upper part of the die base connecting plate 7 is fixedly connected with the power output end 21 of the cylinder 2, and the lower par...

Embodiment 2

[0044] The second embodiment provides a lithium battery, which includes a positive electrode sheet, a negative electrode sheet, a diaphragm and other components, and tabs are provided on both the positive electrode sheet and the negative electrode sheet. In the second embodiment, the tab is cut by the cutting device described in any of the embodiments of the present application. After cutting, the tab has an arc-shaped outer edge, which is convenient for the subsequent processing and transportation of the battery cell.

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Abstract

The application discloses a lithium battery pole lug cutting device and a lithium battery. The lithium battery pole lug cutting device includes a power mechanism, an upper die base, an upper cutting die, a lower die base and a lower cutting die, wherein the upper die base is connected with the power output end of the power mechanism; the upper cutting die is fixedly mounted on the upper die base, and is provided with at least one arc-shaped cutting part for cutting the pole lug; the power mechanism controls the upper die seat and the upper cutting die to move back and forth in a cutting path; the lower die base is fixedly arranged corresponding to the upper die base; and the lower cutting die is fixed on the lower die base, and is provided with a cutting hole corresponding to the arc-shaped cutting part. Under the driving of the power mechanism, the upper cutting die can cut the outer edge of the pole lug so as to enable the outer edge of the pole lug to be arc-shaped; and compared with the outer edge of the pole lug being cuspidal and convex in the prior art, the pole lug with arc-shaped edge has more smooth transition and can avoid damage to membranes on other battery cells in the subsequent processes of processing and transportation of a battery cell.

Description

technical field [0001] The present application relates to the field of lithium battery manufacturing, in particular to the shape of lithium battery tabs and a cutting device for cutting the tabs. Background technique [0002] Lithium battery (Lithium battery) refers to a battery containing lithium (including metal lithium, lithium alloy, lithium ion, lithium polymer) in the electrochemical system. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium battery is a rechargeable battery that mainly relies on lithium ions to move between positive and negative electrodes to work. During charging and discharging, lithium ions intercalate and deintercalate back and forth between the two electrodes: when charging the battery, lithium ions are deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M10/052B21D28/02B21D28/14B21D37/12
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 张修冲阳如坤
Owner SHENZHEN GEESUN INTELLIGENT TECHNOLOGY CO LTD
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