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Technique for making lithium battery pole ear

A manufacturing process and technology of lithium batteries, which are applied to battery pack parts, circuits, electrical components, etc., can solve problems such as battery failure, battery cell blowing, and insufficient bonding force between metal strips and sealants

Active Publication Date: 2009-05-20
厦门宝龙工业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the tabs of lithium batteries are made of aluminum strips, nickel strips, and copper strips directly hot-pressed with the sealant, but the bonding force between the metal strip and the sealant of the tab substrate is insufficient, so that the tabs have electrolysis in the battery cell. In liquid and charged environments, the contact interface is prone to rapid deterioration, which will cause the battery to blow out and cause the battery to fail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. First cut the aluminum strip of the lug base material into sections;

[0020] b. Ultrasonic cleaning of the cut aluminum strip in a copper solvent;

[0021] c. Dry the cleaned aluminum strip in an environment with a temperature of 30-80°C for 3 to 5 hours;

[0022] d, pretreatment, the aluminum strip after cleaning is cleaned 3-5 minute with the potassium hydroxide of 0.1-0.3mol concentration;

[0023] e. Preparation of treatment solution, NaF: 0.8-2g / l, CrO3: 4-6g / l, K2Cr207: 0.8-2g / l, solvent is deionized water;

[0024] f. Surface treatment of the pretreated aluminum strip in the treatment solution for 10 seconds to 2 minutes;

[0025] g, the aluminum strip after the surface treatment is rinsed 2-5 times with deionized water;

[0026] h. Dry the rinsed aluminum strip in an environment with a temperature of 50-100°C for 3-5 hours;

[0027] i. Use PET and double-sided tape to fix the sealant (Sealant) and the aluminum strip after pretreatment and surface treatme...

Embodiment 2

[0032] a. First, cut the copper strip of the lug substrate into sections;

[0033] b. Ultrasonic cleaning of the cut copper strip in acetone solvent;

[0034] c. Dry the cleaned copper strip in an environment with a temperature of 30-80°C for 3 to 5 hours;

[0035] d. Pretreatment, the cleaned copper strip is cleaned with 0.1-0.3mol dilute hydrochloric acid for 3-10 minutes, and then rinsed with deionized water;

[0036] e. Preparation of treatment solution, NaF: 0.8-2g / l, CrO3: 4-6g / l, K2Cr207: 0.8-2g / l, solvent is deionized water;

[0037] f. Surface treatment of the pretreated copper strip in the treatment solution for 10 seconds to 2 minutes;

[0038] g, the copper strip after the surface treatment is rinsed 2-5 times with deionized water;

[0039] h, drying the rinsed copper strip in an environment with a temperature of 50-100°C for 3-5 hours;

[0040] i. Use PET and double-sided tape to fix the sealant (Sealant) with the copper strip after pretreatment and surface tr...

Embodiment 3

[0045] a. First cut the nickel strip of the lug base material into sections;

[0046] b. Ultrasonic cleaning the sectioned nickel strip in acetone solvent;

[0047] c. Dry the cleaned nickel strip in an environment with a temperature of 30-80°C for 3 to 5 hours;

[0048] d. Preparation of treatment solution, NaF: 0.8-2g / l, CrO3: 4-6g / l, K2Cr207: 0.8-2g / l, solvent is deionized water;

[0049] e. Surface treatment of the dried nickel strip in the treatment solution for 10 seconds to 2 minutes;

[0050] f. Rinse the surface-treated nickel strip with deionized water for 2-5 times;

[0051] g, drying the nickel strip after rinsing in an environment with a temperature of 50-100°C for 3-5 hours;

[0052] h. Use PET and double-sided tape to fix the sealant (Sealant) with the surface-treated copper strip to ensure that the size meets the requirements;

[0053] i. Use a flat press to hot-press the fixed full-page semi-finished product. The hot-press temperature is controlled between...

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PUM

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Abstract

The invention discloses a method for manufacturing a lithium cell electrode tab, which comprises the following steps: a, cutting a metal strip of an electrode tab substrate into sections; b, performing ultrasonic cleaning; c, drying; d, performing surface treatment on the metal strip in a treating fluid; e, rinsing the metal strip by using deionized water; f, drying; g, fixing a sealant with the metal strip by PET and a double faced adhesive tape to ensure that the dimension reaches requirements; h, hot pressing, i, cooling at room temperature; and j, cutting a side-layer material into a single electrode tab. Due to the addition of the pretreatment and the surface treatment of the electrode tab base material metal strip or the surface treatment of the electrode tab base material metal strip, oxides on the surface of the metal strip can be removed effectively, and the surface activity of the metal strip is enhanced, so that the binding strength between the metal surface and the sealant is improved, the capability for resisting electrolyte attack is strengthened, the sealing property of battery cells is improved, and the service life of the lithium cell is prolonged from 3 to 6 months to 3 years.

Description

technical field [0001] The invention relates to a manufacturing process of lithium battery tabs. Background technique [0002] Lithium batteries have the advantages of light weight, large capacity, and no memory effect, so they have been widely used. Many digital devices now use lithium batteries as power sources. The energy density of lithium-ion batteries is very high, its capacity is 1.5-2 times that of nickel-metal hydride batteries of the same weight, and it has a very low self-discharge rate; in addition, lithium batteries have almost no "memory effect" and no toxic substances, etc. The advantages are also an important reason for its wide application. The service life of lithium batteries is a common concern in the industry, and one of the reasons that affects the service life of lithium batteries is caused by the ear. [0003] At present, the tabs of lithium batteries are made of aluminum strips, nickel strips, and copper strips directly hot-pressed with the sealant...

Claims

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Application Information

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IPC IPC(8): H01M2/30H01M50/531
CPCY02E60/12Y02E60/10
Inventor 蔡亨江李清晖
Owner 厦门宝龙工业股份有限公司
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