Vacuum sealing method of lithium ion battery

A lithium-ion battery, vacuum sealing technology, applied in non-aqueous electrolyte battery, electrolyte battery manufacturing, sustainable manufacturing/processing and other directions, can solve the problem of not being able to take into account the electrolyte not being drawn out, and meet product quality requirements and process parameters. Reasonable setting and the effect of reducing environmental impact

Inactive Publication Date: 2018-06-22
HEBEI YINLONG NEW ENERGY +1
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the defect that the existing vacuum sealing method for batteries cannot take into account the defects that the electrolyte is not pumped out and the gas in the battery can be completely discharged, and further provides a method that can not only completely discharge the gas in the battery, but also ensure that the electrolyte is not exhausted. Extracted battery vacuum sealing method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The battery vacuum sealing method provided in this embodiment includes:

[0023] Clamp the battery to be sealed in an airtight container, evacuate until the vacuum degree reaches -40KPa, let it stand for 15 minutes, and then use sealing equipment to seal the liquid injection hole of the battery in the vacuum environment;

[0024] The battery in this embodiment is a cylindrical lithium-ion battery with an aluminum shell that has undergone chemical conversion treatment, which uses a ternary material as the positive electrode material, and lithium titanate as the negative electrode material.

Embodiment 2

[0026] The battery vacuum sealing method provided in this embodiment includes:

[0027] Clamp the battery to be sealed in an airtight container, evacuate until the vacuum degree reaches -60KPa, let it stand for 5 minutes, and then use sealing equipment to seal the liquid injection hole of the battery in the vacuum environment;

[0028] The battery in this embodiment is a three-dimensional annular lithium-ion battery with an aluminum shell that has undergone chemical conversion treatment. The ternary material is used as the positive electrode material, and lithium titanate is used as the negative electrode material.

Embodiment 3

[0030] The battery vacuum sealing method provided in this embodiment includes:

[0031] 36 batteries of the same composition and size were clamped in a closed container at a temperature of 25°C, and then vacuumed at a pressure of -50KPa, so that the pressure gauge reached -50KPa, and stood for 10 minutes, and then under the vacuum degree Use sealing equipment to seal the battery;

[0032] The battery in this embodiment is a cylindrical lithium-ion battery with an aluminum shell that has undergone chemical conversion treatment, which uses a ternary material as the positive electrode material, and lithium titanate as the negative electrode material.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of battery manufacturing, and discloses a vacuum sealing method of a battery. According to the method, a battery to be sealed is placed in a vacuum environment of (-40)-(-60) KPa for at least 5 minutes and then is sealed, thus, gas in the battery can be enabled to be completely discharged on the premise that an electrolyte is not pumped out of the battery, highly-uniform pressure in the battery can be maintained, the retention quantity of the electrolyte in the battery is increased, the capacity of the battery is ensured, the service lifetime of thebattery is ensured, and meanwhile, the shape of the battery also can be enabled not to be changed. Moreover, the method is reasonable in process parameter setting, the environmental influence can beeffectively reduced in the vacuum environment, the method is simple and convenient to operate, the sealed environment can be rapidly optimized, the method is suitable for mass production, and a basisis provided for sealing a single battery as well as the product quality requirement is ensured.

Description

technical field [0001] The invention belongs to the technical field of battery manufacturing, and in particular relates to a vacuum sealing method for a lithium ion battery. Background technique [0002] Lithium-ion batteries have become the preferred power source for electric vehicles due to their high energy density, high power density, long cycle life, good reliability, high safety, small size, and light weight. The core of the lithium battery is the battery cell, which is composed of electrodes, electrolyte, etc., and the exterior of the battery cell is shaped and protected by the shell, cover plate, etc. [0003] Lithium batteries currently on the market generally adopt a rectangular structure, and the casing is usually flat, and the casing material is mostly stainless steel or aluminum. However, since lithium batteries with aluminum casings have a larger capacity than batteries with steel casings, the The development trend of lithium batteries is rectangular aluminum ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 刘金良高峰张要枫孔明娇杨小花
Owner HEBEI YINLONG NEW ENERGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap