Method for rapidly judging poor insulation of soft package lithium ion battery aluminium-plastic film

A lithium-ion battery and ion battery technology, which is applied in the direction of testing dielectric strength, material breakdown voltage, etc., can solve the problem of long detection period, poor insulation of aluminum-plastic film, unfavorable heat-sealing parameters or optimization and adjustment of heat-sealing equipment operating conditions, etc. problems, to achieve the effect of convenient operation, guaranteed stability, and simple steps

Active Publication Date: 2015-02-04
WANXIANG 123 CO LTD
View PDF8 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the aluminum-plastic film detection method in the prior art cannot quickly detect the heat-sealing effect of the aluminum-plastic film, the detection period is long, and the specific location where the aluminum-plastic film is corroded cannot be determined, which is not conducive for technicians to timely check the heat-sealing parameters. Or the problem of optimizing and adjusting the operating conditions of heat-sealing

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 rapidly judging poor insulation of soft package lithium ion battery aluminium-plastic film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Take a heat-sealed soft-pack lithium-ion battery 2. The aluminum-plastic film used to pack the soft-pack battery 2 is the aluminum-plastic film of DNP company in Japan, the model is D-EL40H. The packaged lithium-ion battery is placed at 30°C for 5 hours, and the probe 1 is pierced into any edge 3 of the soft-packed lithium-ion battery 2 (see figure 1 ), make the probe 1 contact with the aluminum layer in the aluminum-plastic film of the sealing side 3, and then connect the probe 1 and the positive ear 5 of the soft-packed lithium-ion battery to the two poles of the adjustable voltage DC power supply 7 through the wire 4, The voltage of the adjustable voltage DC power supply 7 is 400V.

[0025] (2) Turn on the power supply. If the edge 3 of the soft-pack lithium-ion battery 2 leaks, breaks down or smokes, it means that the aluminum-plastic film at this position on the edge 3 is poorly insulated. The heat-sealing parameters of the plastic film or the operating condit...

Embodiment 2

[0028] (1) Take a heat-sealed soft-packed lithium-ion battery. The aluminum-plastic film used to pack the soft-packed battery cell is the aluminum-plastic film of DNP Company in Japan, the model is D-ND405. First, heat-seal the soft-packed lithium-ion battery Place the ion battery at 45°C for 3 hours, and pierce the probe 1 into any edge 3 of the soft-pack lithium-ion battery 2 (see figure 1 ), make the probe 1 contact with the aluminum layer in the aluminum-plastic film of the sealing edge 3, and then connect the probe 1 and the negative ear 6 of the soft-packed lithium-ion battery to the two poles of the adjustable voltage DC power supply 7 through the wire 4, The voltage of the adjustable voltage DC power supply 7 is 500V.

[0029] (2) Turn on the power supply. If the edge 3 of the soft-pack lithium-ion battery 2 leaks, breaks down or smokes, it means that the aluminum-plastic film at this position on the edge 3 is poorly insulated. The heat-sealing parameters of the plast...

Embodiment 3

[0032] (1) Take a heat-sealed soft-packed lithium-ion battery. The aluminum-plastic film used to pack the soft-packed battery cell is the aluminum-plastic film of DNP company in Japan, the model is D-ND408. First, heat-seal the soft-packed lithium-ion battery. Place the ion battery at 50°C for 1 hour, and pierce the probe 1 into any edge 3 of the soft-packed lithium-ion battery 2 (see figure 1 ), make the probe 1 contact with the aluminum layer in the aluminum-plastic film of the sealing side 3, and then connect the probe 1 and the positive ear 5 of the soft-packed lithium-ion battery to the two poles of the adjustable voltage DC power supply 7 through the wire 4, The voltage of the adjustable voltage DC power supply 7 is 700V.

[0033] (2) Turn on the power supply. If the edge 3 of the soft-pack lithium-ion battery 2 leaks, breaks down or smokes, it means that the aluminum-plastic film at this position on the edge 3 is poorly insulated. The heat-sealing parameters of the pla...

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 discloses a method for rapidly judging poor insulation of a soft package lithium ion battery aluminium-plastic film. The method comprises the following steps: 1) enabling a probe to be pierced into any seal edge of a soft package lithium ion battery to enable the probe to make contact with an aluminium layer of the aluminium-plastic film, and then, enabling the probe and the positive electrode lug or negative electrode lug of the soft package lithium ion battery to be connected with the two electrodes of an adjustable voltage DC power source through wires respectively, wherein the voltage of the adjustable voltage DC power source is equal to or larger than 400V; and 2) starting the power source, if the seal edge of the soft package lithium ion battery has liquid leakage, breakdown or smoking phenomenon, judging that the aluminium-plastic film insulation is poor at the seal edge place; and if the seal edge of the soft package lithium ion battery does not have liquid leakage, breakdown or smoking phenomenon, judging that the aluminium-plastic film insulation at the seal edge of the soft package lithium ion battery is good. With the method, the insulation state of the soft package lithium ion battery can he judged quickly, and meanwhile, the specific position of microdefect in the aluminum-plastic film can be determined, so that technicists are allowed to carry out optimization adjustment on the operation state of heat-seal equipment or heat-seal parameters in time conveniently.

Description

technical field [0001] The invention relates to the technical field of detection of lithium-ion batteries, in particular to a method for quickly judging the poor insulation of the aluminum-plastic film of a soft-pack lithium-ion battery. [0002] Background technique [0003] The laminated battery in the soft-pack lithium-ion battery needs to use aluminum-plastic film as the packaging film to package the bare cell. During the packaging process, the tab side is first heat-sealed, and then the side and bottom are heat-sealed. Therefore, the aluminum-plastic film forms an airtight packaging body, so the heat-sealing quality of the aluminum-plastic film is crucial to the safety of the battery. [0004] At present, the most conventional method to test the heat sealing quality of aluminum-plastic film is to test the thickness of aluminum-plastic film edge sealing and heat-sealing tensile strength, but in the actual production process, there are often indicators such as aluminum-p...

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
IPC IPC(8): G01R31/12G01N27/92
Inventor 董峰吴赛舟
Owner WANXIANG 123 CO LTD
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