CN116086959A - Adhesive bonding strength testing method - Google Patents
Adhesive bonding strength testing method Download PDFInfo
- Publication number
- CN116086959A CN116086959A CN202211734055.6A CN202211734055A CN116086959A CN 116086959 A CN116086959 A CN 116086959A CN 202211734055 A CN202211734055 A CN 202211734055A CN 116086959 A CN116086959 A CN 116086959A
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- Prior art keywords
- test
- adhesive
- auxiliary
- piece
- sample
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- 238000012360 testing method Methods 0.000 title claims abstract description 142
- 238000004026 adhesive bonding Methods 0.000 title claims abstract description 8
- 230000001070 adhesive effect Effects 0.000 claims abstract description 59
- 239000000853 adhesive Substances 0.000 claims abstract description 58
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- 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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
-
- 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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention belongs to the technical field of batteries, and discloses a method for testing the bonding strength of an adhesive, which comprises the following steps: s100, respectively cutting an auxiliary sample and a test sample on the side wall of the battery shell, wherein the auxiliary sample and the test sample are provided with test ends; s200, coating an adhesive on the inner concave surface of the auxiliary sample wafer test end; s300, adhering the outer convex surface of the test sample piece testing end to the position where the auxiliary sample piece is coated with the adhesive, and placing the auxiliary sample piece and the test sample piece in a staggered manner so as to respectively reserve clamping ends on the auxiliary sample piece and the test sample piece; s400, forming a gluing area at the overlapping position of the auxiliary sample and the test sample, and pressing the auxiliary sample and the test sample to uniformly distribute the adhesive in the gluing area; s500, solidifying the adhesive, and fixing the auxiliary sample and the test sample to form a test piece; s600, respectively clamping the auxiliary sample piece and the clamping end of the test sample piece, and carrying out a tensile shear test on the test piece. The method for testing the bonding strength of the adhesive has accurate testing result.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a method for testing the bonding strength of an adhesive.
Background
Gluing is a common connection mode in the battery production and preparation process. Before using the adhesive, it is often necessary to evaluate the adhesive strength.
In the prior art, a sample wafer adopted for adhesive bonding strength evaluation of the square-shell battery cell module is of a sheet-shaped structure which is the same as a battery shell processing mode, the size of the sample wafer is determined according to national standard GB-T7124, and the sample wafer is convenient to manufacture. However, in the production and preparation of cylindrical batteries, the adhesive strength evaluation method used for square batteries is still inherited, and the steel shell of the square battery is a plane, so that the sample wafer is generally in a plane structure, and the shape of the sample wafer is inconsistent with that of the steel shell due to the arc-shaped side wall of the cylindrical steel shell, so that the adhesive effect verification of the cylindrical battery is not intuitive and has larger error.
Therefore, it is needed to provide an adhesive strength testing method to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a method for testing the bonding strength of an adhesive, which has accurate testing results.
To achieve the purpose, the invention adopts the following technical scheme:
the method for testing the bonding strength of the adhesive comprises the following steps:
s100, respectively cutting an auxiliary sample and a test sample on the side wall of a battery shell, wherein the auxiliary sample and the test sample are provided with test ends;
s200, coating an adhesive on the inner concave surface of the auxiliary sample wafer testing end;
s300, adhering an outer convex surface of a test end of the test sample piece to a position where the auxiliary sample piece is coated with the adhesive, and placing the auxiliary sample piece and the test sample piece in a staggered manner so as to respectively reserve clamping ends on the auxiliary sample piece and the test sample piece;
s400, forming a glue area at the overlapping position of the auxiliary sample piece and the test sample piece, and pressing the auxiliary sample piece and the test sample piece to uniformly distribute the adhesive in the glue area;
s500, solidifying the adhesive, and fixing the auxiliary sample and the test sample to form a test piece;
s600, respectively clamping the auxiliary sample piece and the clamping end of the test sample piece, and carrying out a tensile shear test on the test piece.
Optionally, when the auxiliary sample piece and the test sample piece are cut, cutting is performed along the height direction of the battery case.
Optionally, the tensile shear test is performed using a universal tensile machine.
Optionally, the method for testing the bonding strength of the adhesive further comprises the following steps: s210, placing a steel wire on the inner concave surface of the auxiliary sample wafer testing end for limiting the thickness of the gluing area.
Optionally, the auxiliary sample sheet and the test sample sheet are pressed together by a clip.
Optionally, the curing mode of the adhesive is high-temperature curing or normal-temperature curing.
Optionally, the method for testing the bonding strength of the adhesive further comprises the following steps:
and flattening the clamping ends of the auxiliary sample wafer and the test sample wafer.
Optionally, the chord length of the auxiliary sample wafer is 10-40 mm.
Optionally, the chord length of the test sample piece is 10-40 mm.
Optionally, the lengths of the auxiliary sample piece and the test sample piece are equal to the height of the side wall of the battery shell.
The beneficial effects are that:
the method for testing the bonding strength of the adhesive provided by the invention directly intercepts the auxiliary sample wafer and the test sample wafer on the prepared battery shell to test the bonding strength of the adhesive, thereby eliminating test result errors caused by different shapes or processing technologies of the sample wafer and the actual battery shell. The method is particularly suitable for cylindrical batteries, and the auxiliary sample piece and the test sample piece cut from the battery shell can keep the shape of the original battery shell, so that the test result is accurate and reliable.
Drawings
FIG. 1 is a flow chart of an adhesive bond strength test method provided by the invention;
FIG. 2 is a schematic diagram of the sampling process of the auxiliary sample or test piece provided by the invention;
fig. 3 is a schematic structural view of a test piece provided by the present invention.
In the figure:
10. a test end; 20. a clamping end; 100. auxiliary sample pieces; 200. a test specimen; 300. an adhesive; 1000. a test piece; 2000. and a battery case.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
Referring to fig. 1 to 3, the present embodiment provides a method for testing the bonding strength of an adhesive 300, which includes the following steps:
s100, cutting an auxiliary sample piece 100 and a test sample piece 200 on the side wall of the battery shell 2000 respectively, wherein the auxiliary sample piece 100 and the test sample piece 200 are provided with a test end 10;
s200, arranging a coating area on the inner concave surface of the test end 10 of the auxiliary sample wafer 100, and coating an adhesive 300 on the coating area;
s300, adhering the outer convex surface of the testing end 10 of the test sample piece 200 to the position where the auxiliary sample piece 100 is coated with the adhesive 300, and placing the auxiliary sample piece 100 and the test sample piece 200 in a staggered manner so as to respectively reserve the clamping ends 20 on the auxiliary sample piece 100 and the test sample piece 200;
s400, forming a glue area at the overlapping position of the auxiliary sample 100 and the test sample 200, and pressing the auxiliary sample 100 and the test sample 200 to uniformly distribute the adhesive 300 in the glue area;
s500, solidifying the adhesive 300, and fixing the auxiliary sample wafer 100 and the test sample wafer 200 to form a test piece 1000;
s600, clamping the auxiliary sample 100 and the clamping end 20 of the test sample 200, respectively, and performing a tensile shear test on the test piece 1000.
The method for testing the bonding strength of the adhesive 300 is to directly intercept the auxiliary sample wafer 100 and the test sample wafer 200 on the prepared battery shell 2000 to test the bonding strength of the adhesive 300, so that the test result errors caused by different shapes or processing processes of the sample wafer and the actual battery shell 2000 can be eliminated. The method is particularly suitable for cylindrical batteries, and the auxiliary sample piece 100 and the test sample piece 200 cut from the battery shell 2000 can keep the shape of the original battery shell 2000, so that the test result is accurate and reliable.
Referring to fig. 2, further, when the auxiliary coupon 100 and the test coupon 200 are cut, cutting is performed in the height direction of the battery case 2000. Alternatively, prior to cutting, the battery case 2000 may be positioned by scoring the surface with steel scissors along the positioning lines. The lengths of the auxiliary sample 100 and the test sample 200 may be identical to the height of the side wall of the battery case 2000, thereby enabling convenient cutting.
Further, the chord length a of the auxiliary sample piece 100 may be 10 to 40mm, alternatively, may be 10mm, 15mm, 20mm, 25mm, 30mm, 35mm or 40mm, etc., depending on the actual test requirements.
Further, the chord length b of the test piece 200 is 10 to 40mm, alternatively, may be 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm or the like, depending on the actual test requirements.
Alternatively, the dimensions of the auxiliary sample 100 and the dimensions of the test sample 200 may be the same or different.
Further, the method for testing the bonding strength of the adhesive further comprises the following steps: s210, placing a steel wire on the inner concave surface of the test end 10 of the auxiliary sample wafer 100 for limiting the thickness of the adhesive area. When the auxiliary sample 100 and the test sample 200 are bonded later, the steel wire is clamped between the auxiliary sample and the test sample, so that the thickness of the adhesive 300 and the diameter of the steel wire are kept uniform. The thickness is typically limited by using a steel wire with a diameter of 0.2mm placed along the length of the auxiliary coupon 100.
Further, the method for testing the bonding strength of the adhesive 300 further comprises pressing the auxiliary sample wafer 100 and the test sample wafer 200 by using the clips. After the auxiliary sample wafer 100 and the test sample wafer 200 are adhered, the auxiliary sample wafer 100 and the test sample wafer 200 are clamped and fixed by the clamp, so that the positions of the auxiliary sample wafer and the test sample wafer are prevented from moving, and the consistency of the areas of the adhesive areas of different test pieces 1000 is ensured, so that the test results are convenient to process.
Further, the curing mode of the adhesive 300 is high temperature curing or normal temperature curing. After the test piece is clamped and fixed, the adhesive 300 needs to be cured, and the curing mode can be selected according to the use requirement, which is not particularly limited herein.
Further, after the preparation of the test piece 1000 is completed or after the cutting of the auxiliary sample wafer 100 and the test sample wafer 200 is completed, the clamping end 20 can be flattened, so that the clamping is convenient and stable, and the clamping end 20 is prevented from loosening in the stretching or shearing process, so that the test process and the test result are prevented from being influenced.
Further, after the test piece 1000 was prepared, a tensile shear test was performed using a universal tensile machine. The test parameters are referred to national standard GB-T7124.
Since the purpose of the test is to evaluate the adhesion of the adhesive 300 to the battery case 2000, the evaluation should be based on the failure of the adhesion of the outer surface of the test piece 200 (i.e., the adhesive remains on the outer surface of the test piece 200) or cohesive failure of the adhesive layer, and the rest should be omitted. In processing the test results, the formula is used: tensile shear strength σ=tensile force F/adhesive area S. The adhesive area S can be chord length multiplied by width, or arc length multiplied by width, and parameters of a plurality of control groups are kept consistent.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. The method for testing the bonding strength of the adhesive is characterized by comprising the following steps of:
s100, cutting an auxiliary sample piece (100) and a test sample piece (200) on the side wall of a battery shell (2000), wherein the auxiliary sample piece (100) and the test sample piece (200) are respectively provided with a test end (10);
s200, coating an adhesive (300) on the inner concave surface of the test end (10) of the auxiliary sample wafer (100);
s300, adhering an outer convex surface of a test end (10) of the test sample piece (200) to the position where the auxiliary sample piece (100) is coated with the adhesive (300), wherein the auxiliary sample piece (100) and the test sample piece (200) are placed in a staggered mode, so that clamping ends (20) are reserved on the auxiliary sample piece (100) and the test sample piece (200) respectively;
s400, forming an adhesive area at the overlapping position of the auxiliary sample sheet (100) and the test sample sheet (200), and pressing the auxiliary sample sheet (100) and the test sample sheet (200) to uniformly distribute the adhesive (300) in the adhesive area;
s500, solidifying the adhesive (300), and fixing the auxiliary sample (100) and the test sample (200) to form a test piece (1000);
s600, respectively clamping the auxiliary sample piece (100) and the clamping end (20) of the test sample piece (200) and performing a tensile shear test on the test piece (1000).
2. The method for testing the adhesive strength according to claim 1, wherein the auxiliary sample (100) and the test sample (200) are cut in the height direction of the battery case (2000).
3. The method of claim 1, wherein the tensile shear test is performed using a universal tensile machine.
4. The method for testing adhesive bond strength of claim 1, further comprising the steps of: and S210, placing a steel wire on the inner concave surface of the test end (10) of the auxiliary sample wafer (100) for limiting the thickness of the gluing area.
5. The method for testing adhesive strength according to claim 4, wherein the auxiliary sample sheet (100) and the test sample sheet (200) are pressed together by a clip.
6. The method for testing adhesive strength according to claim 5, wherein the adhesive (300) is cured at a high temperature or at a normal temperature.
7. The method for testing adhesive bond strength of claim 1, further comprising:
flattening the clamping ends (20) of the auxiliary sample piece (100) and the test sample piece (200).
8. The method for testing adhesive bond strength according to claim 1, wherein the auxiliary coupon (100) has a chord length of 10 to 40mm.
9. The method for testing adhesive bond strength according to claim 1, wherein the test piece (200) has a chord length of 10 to 40mm.
10. The method for testing adhesive bond strength according to claim 1, wherein the auxiliary coupon (100) and the test coupon (200) are each equal in length to the height of the side wall of the battery case (2000).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211734055.6A CN116086959A (en) | 2022-12-30 | 2022-12-30 | Adhesive bonding strength testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211734055.6A CN116086959A (en) | 2022-12-30 | 2022-12-30 | Adhesive bonding strength testing method |
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| Publication Number | Publication Date |
|---|---|
| CN116086959A true CN116086959A (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202211734055.6A Pending CN116086959A (en) | 2022-12-30 | 2022-12-30 | Adhesive bonding strength testing method |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735311A (en) * | 2023-06-12 | 2023-09-12 | 西安交通大学 | Manufacturing method and testing method of tensile shear sample |
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2022
- 2022-12-30 CN CN202211734055.6A patent/CN116086959A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735311A (en) * | 2023-06-12 | 2023-09-12 | 西安交通大学 | Manufacturing method and testing method of tensile shear sample |
| CN116735311B (en) * | 2023-06-12 | 2024-04-16 | 西安交通大学 | Manufacturing method and testing method of tensile shear sample |
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