Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for testing encapsulation effect of soft pack battery

A soft-pack battery and inspection method technology, applied in measuring devices, using stable tension/pressure to test material strength, instruments, etc., can solve the problem of not being able to reflect whether there are pores at the microscopic level, whether the bond is firm, unobservable, unable to Effectively reflect and other problems to achieve the effect of balanced force, saving time and labor, and high operability

Active Publication Date: 2019-02-19
CHINA AUTOMOTIVE BATTERY RES INST CO LTD
View PDF14 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recorded value of the tensile force is the maximum value, and the peel strength of the defective package that is prone to leakage should be lower than the normal package strength, and the recorded maximum value cannot effectively reflect this.
The latter two methods can only make a rough judgment, and cannot reflect whether there are pores at the microscopic level or whether the combination is firm
Direct visual inspection can only be judged by whether there are dead folds on the surface. The peeled surface after peeling is the layer with the weakest bond. After the dry-process aluminum-plastic film is peeled off, the aluminum layer and the PP layer are often peeled off directly. There is a gap between the two PP layers. Possible gaps are basically invisible

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for testing encapsulation effect of soft pack battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) inject 100g of water into the battery intermediate product after primary packaging;

[0037] (2) Carry out secondary encapsulation directly to it;

[0038] (3) if figure 1 As shown, two transparent PC boards 002 and 003 are used to stick to the top and bottom of the battery under test 001, and the two PC boards 002 and 003 are fixed with six pairs of bolts and nuts 004, and the distance between the two boards is 11mm;

[0039] (4) Put the battery clamped by the splint into the oven and start heating from room temperature (25°C) at a heating rate of 5°C / min. After heating to 100°C, it becomes heat preservation, and the temperature in the oven is kept at 100±2°C;

[0040] (5) Record the time from the start of oven insulation to the thermal expansion breach of the battery. If the time is greater than 8 minutes, it is qualified. If it is lower than this value, the packaging is unqualified. Record the position of the breach and give feedback to improve the packaging pro...

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

PropertyMeasurementUnit
heat deflection temperatureaaaaaaaaaa
elastic modulusaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for testing the encapsulation effect of a soft pack battery. The method comprises the following steps: (1) injecting a quantity of water into an intermediate batteryafter primary encapsulation; (2) directly performing a secondary encapsulation on it; (3) using two rectangular plates to fit the upper and lower surfaces of the tested battery, and putting the testedbattery into an oven for baking after fixing; (4) baking the battery in high temperature until the water vaporization in the battery boosts and leads to the rupture of an aluminium plastic film, andrecording the cracking time and the positions of the cracks on the battery. The testing method replaces an electrolyte with water or alcohol, which is more environmentally friendly, and has higher operability. The encapsulation failure of the battery during actual use is quickly simulated by heating, and then the process parameters is changed or the equipment is adjusted according to the results.

Description

technical field [0001] The invention relates to a packaging effect inspection method of a soft pack battery, which belongs to the technical field of lithium ion battery manufacturing. Background technique [0002] In recent years, the replacement of electronic products is getting faster and faster, especially the life cycle of consumer electronic products such as mobile phones and notebook computers is gradually shortening, so the demand for soft-pack lithium batteries used is also increasing. At present, the vast majority of soft-pack lithium batteries are packaged with aluminum-plastic film, which is mainly composed of nylon layer, aluminum layer and PP layer. After the positive and negative electrodes are transferred from the production area to the assembly area, the positive and negative electrodes and the separator together form a battery core package. After the core package and tabs are welded, they are placed in an aluminum-plastic film for primary packaging, and then...

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): G01N25/72G01N3/12
CPCG01N3/12G01N25/72G01N2203/0003G01N2203/0019G01N2203/0044G01N2203/0067
Inventor 赵元宇李翔王曦
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com