CN113466033A - Lithium battery tab welding tension testing method - Google Patents
Lithium battery tab welding tension testing method Download PDFInfo
- Publication number
- CN113466033A CN113466033A CN202110594651.8A CN202110594651A CN113466033A CN 113466033 A CN113466033 A CN 113466033A CN 202110594651 A CN202110594651 A CN 202110594651A CN 113466033 A CN113466033 A CN 113466033A
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- current collector
- tab
- welding
- tension
- lithium battery
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- 238000003466 welding Methods 0.000 title claims abstract description 75
- 238000012360 testing method Methods 0.000 title claims abstract description 41
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000002390 adhesive tape Substances 0.000 claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 15
- 239000000853 adhesive Substances 0.000 claims abstract description 9
- 230000001070 adhesive effect Effects 0.000 claims abstract description 9
- 238000010998 test method Methods 0.000 claims abstract description 6
- 239000003292 glue Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000004513 sizing Methods 0.000 claims 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 11
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 230000002411 adverse Effects 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 description 4
- 238000009864 tensile test Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a lithium battery tab welding tension test method, which comprises the following steps: welding a tab on the first surface of the current collector; cutting the current collector to enable the current collector to be a first preset width; pasting adhesive paper with a second preset width on the second surface of the current collector; and clamping the lug by using one manipulator of the tension tester, clamping the overlapped part of the current collector and the adhesive tape by using the other manipulator, and carrying out tension test on the lug. The method for testing the welding tension of the lithium battery tab can effectively test the actual tension of the tab welding position, monitor the welding effect of the tab of the soft package lithium ion battery cell, prevent the tab from being insufficiently welded and flowing out, improve the performance of the soft package lithium ion battery cell and reduce the adverse cost.
Description
Technical Field
The invention relates to the technical field of battery testing, in particular to a method for testing welding tension of a lithium battery tab.
Background
Among the prior art, along with soft packet of lithium ion battery gets into fields such as cell-phone, bluetooth headset, electron cigarette, in lithium ion battery film-making production process, utmost point ear welding effect has very big influence to the performance effect of electric core, for example, when utmost point ear welding rosin joint, the big internal resistance of IMP that the back process detected directly influences electric core quality, causes certain loss of cost and unrestrained. Therefore, the welding tension testing method is an indispensable link, the welding effect can be controlled, and the quality of the battery cell is improved.
In the existing tab welding tension test method, when an actual tab and a current collector are subjected to equal and opposite forces of a tension device, the thinner the current collector is, the tensile resistance of the current collector is smaller than that of a welding position, and when the welding tension is tested, the current collector is directly broken at the current collector instead of the welding position, so that the welding tension cannot be actually measured. There is the tensile test unqualified, leads to utmost point ear welding tensile test unqualified, is unfavorable for soft packet of lithium ion battery utmost point ear welding effect's management and control, easily causes the rosin joint of mass to flow, makes soft packet of lithium ion battery performance bad, has greatly reduced soft packet of lithium ion battery's quality.
Disclosure of Invention
The embodiment of the invention provides a method for testing welding tension of a lithium battery tab, which aims to solve the problem that the control effect of the tab welding effect of a soft-package lithium battery is poor due to unqualified tab welding tension test when the tab is subjected to the welding tension test in the prior art.
The application provides a lithium battery tab welding tension test method in a first aspect, the lithium battery tab welding tension test method includes:
welding a tab on the first surface of the current collector;
cutting the current collector to enable the current collector to be a first preset width;
pasting adhesive paper with a second preset width on the second surface of the current collector;
and clamping the lug by using one manipulator of the tension tester, clamping the overlapped part of the current collector and the adhesive tape by using the other manipulator, and carrying out tension test on the lug.
Further, the welding of utmost point ear on the first face of mass flow body includes:
and performing high-frequency vibration on the second surface of the current collector under a preset pressure by using ultrasonic waves to weld a tab on the first surface of the current collector, wherein the first surface is opposite to the second surface.
Further, the cutting the current collector to make the current collector be a first preset width includes:
sticking tab glue on the tab;
cutting the current collector to enable the current collector to be a preset width, and the method comprises the following steps:
and cutting the current collector to enable the width of the current collector to be larger than that of the tab glue.
Further, paste the adhesive tape of the second preset width on the second surface of the mass flow body, include:
and pasting gummed paper on the second surface of the current collector, wherein the width of the gummed paper is greater than the width of the welding on the second surface.
Further, the bottom end of the gummed paper is coincided with the bottom end of the current collector.
Further, carry out tensile test to utmost point ear, include:
and testing the welding tension of the tab by using equal tension and opposite tension.
Furthermore, a micro air bag is arranged below the gummed paper.
Furthermore, the gas in one part of the micro air bags and the impregnating compound in the other part of the micro air bags are filled with the impregnating compound.
The invention provides a lithium battery tab welding tension test method, which comprises the following steps: welding a tab on the first surface of the current collector; cutting the current collector to enable the current collector to be a first preset width; pasting adhesive paper with a second preset width on the second surface of the current collector; and clamping the lug by using one manipulator of the tension tester, clamping the overlapped part of the current collector and the adhesive tape by using the other manipulator, and carrying out tension test on the lug. The method for testing the welding tension of the lithium battery tab can effectively test the actual tension of the tab welding position, monitor the welding effect of the tab of the soft package lithium ion battery cell, prevent the tab from being insufficiently welded and flowing out, improve the performance of the soft package lithium ion battery cell and reduce the adverse cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a flowchart of a method for testing a welding tension of a tab of a lithium battery according to an embodiment of the present invention;
fig. 2 is a schematic front view of a lithium battery tab welding tension testing device according to an embodiment of the present invention;
fig. 3 is a schematic reverse side view of a lithium battery tab welding tension testing device according to an embodiment of the present invention;
fig. 4 is a testing schematic diagram of a lithium battery tab welding tension testing device provided by an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a method for testing the welding tension of a lithium battery tab, which is applied to the lithium battery tab, and as shown in fig. 1, the method for testing the welding tension of the lithium battery tab comprises a step S101, a step S102, a step S103 and a step S104, and the method comprises the following specific steps:
and S101, welding a tab on the first surface of the current collector.
As an embodiment, welding a tab to a first surface of a current collector includes:
and performing high-frequency vibration on a second surface of the current collector under a preset pressure by using ultrasonic waves to weld a tab on a first surface of the current collector, wherein the first surface is opposite to the second surface.
The specific method for welding the tab to the current collector comprises the following steps: the method is characterized in that an automatic sheet making machine is utilized, ultrasonic welding is used in the automatic sheet making machine, the ultrasonic welding is used on the surfaces of a lug and a current collector under certain pressure by ten thousands of high-frequency vibration actions for one second, the lug and the current collector are mutually rubbed, atomic layers of the lug and the current collector are mutually permeated and fused, the purpose of welding the lug and the current collector by intermolecular firmness is achieved, and meanwhile, the automatic sheet making machine is controlled to enable heat not to reach the melting point of the lug and the current collector.
And S102, cutting the current collector to enable the current collector to be a first preset width.
And cutting the current collector according to the preset width because the width of the current collector does not meet the preset specification.
Further, cutting the current collector to enable the current collector to be a first preset width, and the method comprises the following steps:
and sticking tab glue on the tab, wherein the width of the tab glue is greater than that of the tab.
Cut out the mass flow body and make the mass flow body for predetermineeing the width, include:
and cutting the current collector to enable the width of the current collector to be larger than that of the tab glue.
When the welding of the lug and the current collector is finished, the current collectors on two sides of the welding position are cut off in the length direction of the current collector, and the lug glue length is kept slightly larger than the width.
And S103, pasting adhesive paper with a second preset width on the second surface of the current collector.
Further, paste the adhesive tape of the width that predetermines of second on the second surface of mass flow body, include:
and pasting gummed paper on the second surface of the current collector, wherein the width of the gummed paper is greater than the width of the welding mark on the second surface.
Furthermore, one end of the adhesive tape is overlapped with the bottom end of the welding seal, the other end of the adhesive tape is overlapped with the bottom end of the current collector, and the adhesive tape can be covered to the bottom end of the current collector from the bottom end of the welding seal.
And S104, clamping the lug by using one manipulator of the tension tester, clamping the overlapped part of the current collector and the adhesive tape by using the other manipulator, and carrying out tension test on the lug.
Further, carry out the tensile test to utmost point ear, include:
and testing the welding tension of the tab by using equal tension and opposite tension.
The embodiment provides a method for testing welding tension of a lithium battery tab, which comprises the following steps: welding a tab on the first surface of the current collector; cutting the current collector to enable the current collector to be a first preset width; pasting adhesive paper with a second preset width on the second surface of the current collector; and clamping the lug by using one manipulator of the tension tester, clamping the overlapped part of the current collector and the adhesive tape by using the other manipulator, and carrying out tension test on the lug. The method for testing the welding tension of the lithium battery tab can effectively test the actual tension of the tab welding position, monitor the welding effect of the tab of the soft package lithium ion battery cell, prevent the tab from being insufficiently welded and flowing out, improve the performance of the soft package lithium ion battery cell and reduce the adverse cost.
Furthermore, a plurality of micro air bags are arranged below the adhesive tape, the micro air bags are arranged at intervals, the distance between the micro air bags is large enough to enable the adhesive tape to be adhered to a current collector, the current collector is prevented from being damaged by a mechanical arm through the micro air bags, a puncturing mechanism for puncturing the air bags is arranged beside a part of the air bags, an impregnating compound is filled in the air bags, the puncturing mechanism comprises a pillar with the lower end connected with the upper end of the release paper, and a tip part connected with the upper end of the pillar, when the mechanical arm extrudes the adhesive tape, the micro air bags can be extruded, the puncturing mechanisms puncture the air bags, the impregnating compound in the air bags can dissolve glue on the adhesive tape, and a user can tear off the adhesive tape conveniently.
Taking fig. 2 to 4 as an example, the testing device includes a tab 10, a tab adhesive 20, a current collector 30, and a gummed paper 40, and ultrasonic welding is used in an automatic sheet making machine to apply a high frequency vibration action on the surfaces of the tab 10 and the current collector 30 ten thousand times per second under a certain pressure, so that the tab 10 and the current collector 30 rub against each other, and atomic layers of the tabs permeate and fuse with each other, thereby achieving the purpose of firmly welding the tab 10 and the current collector 30 between molecules, but not reaching the melting point of the tab 10 and the current collector 30. After the tab glue 20 is pasted on the tab 10, the current collectors 30 on both sides of the welded part are cut off in the length direction of the current collectors 30, and the width is kept slightly larger than the length of the tab glue 20, as shown in fig. 2. And then pasting gummed paper 40 on the back of the welding position of the tab 10, wherein the pasting requirements are as follows: the adhesive tape 40 is greater than the width of the solder mark in the length direction of the current collector 30, and the adhesive tape 40 overlaps with the lower edge of the solder mark and the lower edge of the current collector in the width direction of the current collector 30, referring specifically to fig. 3. And finally, clamping the lug by using a manipulator 61 of the tension tester, clamping the overlapped part of the current collector and the adhesive tape by using another manipulator 62, and forbidding clamping the lug welding part. And then testing the welding tension of the electrode lugs by using equal tension and opposite tension, and particularly referring to fig. 4.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (8)
1. The method for testing the welding tension of the lithium battery tab is characterized by comprising the following steps of:
welding a tab on the first surface of the current collector;
cutting the current collector to enable the current collector to be a first preset width;
pasting adhesive paper with a second preset width on the second surface of the current collector;
and clamping the lug by using one manipulator of the tension tester, clamping the overlapped part of the current collector and the adhesive tape by using the other manipulator, and carrying out tension test on the lug.
2. The method for testing the welding tension of the lithium battery tab according to claim 1, wherein the welding the tab to the first surface of the current collector comprises:
and performing high-frequency vibration on the second surface of the current collector under a preset pressure by using ultrasonic waves to weld a tab on the first surface of the current collector, wherein the first surface is opposite to the second surface.
3. The method for testing the welding tension of the lithium battery tab according to claim 1, wherein the cutting the current collector to a first preset width comprises:
sticking a tab glue on a tab, wherein the width of the tab glue is larger than that of the tab;
cutting the current collector to enable the current collector to be a preset width, and the method comprises the following steps:
and cutting the current collector to enable the width of the current collector to be larger than that of the tab glue.
4. The method for testing the welding tension of the lithium battery tab according to claim 1, wherein the attaching of the adhesive paper with a second preset width on the second surface of the current collector comprises:
and pasting gummed paper on the second surface of the current collector, wherein the width of the gummed paper is greater than the width of the welding on the second surface.
5. The method for testing the welding tension of the lithium battery tab according to claim 4, wherein one end of the adhesive tape coincides with the bottom end of the welding mark, and the other end of the adhesive tape coincides with the bottom end of the current collector.
6. The lithium battery tab welding tension test method as claimed in claim 1, wherein the performing tension test on the tab comprises:
and testing the welding tension of the tab by using equal tension and opposite tension.
7. The method for testing the welding tension of the lithium battery tab according to claim 1, wherein a micro air bag is disposed under the adhesive paper.
8. The method for testing the welding tension of the lithium battery tab as claimed in claim 7, wherein a part of the micro air bags are filled with gas, and the other part of the micro air bags are filled with a sizing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110594651.8A CN113466033A (en) | 2021-05-28 | 2021-05-28 | Lithium battery tab welding tension testing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110594651.8A CN113466033A (en) | 2021-05-28 | 2021-05-28 | Lithium battery tab welding tension testing method |
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| CN113466033A true CN113466033A (en) | 2021-10-01 |
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| CN202110594651.8A Pending CN113466033A (en) | 2021-05-28 | 2021-05-28 | Lithium battery tab welding tension testing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935541A (en) * | 2022-07-25 | 2022-08-23 | 楚能新能源股份有限公司 | Lithium ion battery lug welding effect evaluation method |
| CN117538153A (en) * | 2023-11-14 | 2024-02-09 | 东莞市创明电池技术有限公司 | Method for testing welding tension at bottom of cylindrical battery |
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