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A kind of manufacturing method of anti-vibration lithium-ion battery

A technology of lithium-ion batteries and manufacturing methods, applied in secondary battery manufacturing, electrolyte storage battery manufacturing, secondary batteries, etc., can solve problems such as failure to meet long-term high-frequency vibration, failure to meet the requirements of new multi-functional tools, battery failure, etc.

Active Publication Date: 2016-08-31
江苏海四达动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although ordinary power lithium-ion batteries can meet the requirements of general standards, they cannot meet the requirements of long-term high-frequency vibration, especially longitudinal vibration at a frequency above 250Hz. After several times of use, the battery is prone to failure and cannot meet the requirements of new multi-function tools. requirements

Method used

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  • A kind of manufacturing method of anti-vibration lithium-ion battery
  • A kind of manufacturing method of anti-vibration lithium-ion battery
  • A kind of manufacturing method of anti-vibration lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Comparison of batteries with different folding endurance:

[0024] 4 × 0.1mm aluminum lugs with a folding resistance of 2, 3, and 5 were selected respectively, and the positive electrode was selected with a bipolar lug design to prepare a 18650 power lithium-ion battery. The battery is fully charged, and the vibration frequency is 250Hz, the amplitude is 0.1mm, and the continuous vibration time is 8h. Test 50 batteries.

[0025] Table 1. Tab test comparison data of different folding endurance: (made into nickel-cobalt-manganese-lithium 18650-1300 power lithium-ion battery for testing)

[0026] Table 1 Number of failed batteries after tab vibration with different folding endurance Unit: stick

[0027]

Embodiment 2

[0029] Manufacturing method of positive electrode sheet:

[0030] The positive electrode material nickel cobalt lithium manganese oxide, the conductive agent Super "P", the binder PVDF, and the solvent NMP are synthesized into a slurry in a weight ratio of 100:2.5:3.5:33, and coated on a 0.02mm thick aluminum foil. Cut the positive electrode sheet into a long shape with a width of 56 mm: an uncoated aluminum foil is left at the proper position of the electrode sheet, and an aluminum tab will be spot-welded on its surface in the subsequent process.

[0031] Manufacturing method of negative electrode sheet:

[0032] Negative electrode material graphite, conductive agent, binder, and solvent were synthesized into a slurry in a weight ratio of 100:7:6:52, and coated on a 0.01 mm thick copper foil. Cut the negative electrode strip into a long shape with a width of 58 mm: an uncoated copper foil is left at the proper position of the pole piece, and a nickel tab will be spot-welded ...

Embodiment 3

[0040] After the cell of Example 2 is put into the case, it is processed by a special machine, with a frequency of 15 Hz and 75 Hz, and a displacement of 0.5 mm for 10 min.

[0041] Take 50 batteries, use the test method of Example 1 to test the batteries, and use the battery of Example 2 to conduct a comparative test.

[0042] Table 3 Number of battery failures at different rotation frequencies Unit: branch

[0043]

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Abstract

The patent of the present invention provides a method for manufacturing a vibration-resistant lithium-ion battery. The cylindrical lithium-ion battery includes a positive electrode, a negative electrode, a diaphragm and an electrolyte. Corresponding technical measures have been taken during the design improvement process. The positive electrode sheet of the battery adopts aluminum tabs with a folding resistance ≥ 5 times, and the positive electrode tab is designed in the middle of the electrode sheet. When the battery is assembled, the terminal tape is removed from the wound electrode group. , after the pole group is put into the shell, it is processed by professional machinery for 5-30 minutes under the condition of rotation frequency 20-55Hz and displacement 0.2-1.0mm, and is made into a vibration-resistant Lithium Ion Battery.

Description

【Technical field】 [0001] The invention relates to a manufacturing method of a vibration-resistant lithium ion battery. 【Background technique】 [0002] In 1990, SONY took the lead in launching LiCoO 2 It is a lithium-ion secondary battery that is a cathode material, and it began to be industrialized in 1991. Over the past ten years, lithium-ion secondary batteries have developed rapidly. With their advantages such as high specific energy, long cycle life, small self-discharge, high output voltage, green and pollution-free, the technology has developed rapidly. The rate of increase in product market share is unmatched by any chemical battery so far, and it has become the most popular battery product in the world battery market. According to statistics, the global sales of lithium-ion batteries have exceeded the sum of nickel-metal hydride and nickel-cadmium batteries. [0003] At present, the field of electric tools is developing rapidly, from single-function electric tools...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M2/26H01M50/531
CPCH01M10/0431H01M10/0587H01M10/0525H01M50/538Y02E60/10Y02P70/50
Inventor 沈涛王兴威唐琛明黄钟琪夏树强陈睿张建忠张勤黄卫琴张慕容
Owner 江苏海四达动力科技有限公司