CN214472679U - Testing mechanism for peeling strength of lithium ion battery pole piece - Google Patents
Testing mechanism for peeling strength of lithium ion battery pole piece Download PDFInfo
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- CN214472679U CN214472679U CN202120195443.6U CN202120195443U CN214472679U CN 214472679 U CN214472679 U CN 214472679U CN 202120195443 U CN202120195443 U CN 202120195443U CN 214472679 U CN214472679 U CN 214472679U
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Abstract
A testing mechanism for the peeling strength of a lithium ion battery pole piece comprises a tensile testing machine and a substrate combination, wherein the substrate combination comprises a steel plate and an adhesive layer; one end of the battery pole piece is adhered to the substrate assembly, the other end of the battery pole piece is connected with one action end of the tensile testing machine, and the steel plate is connected with the other action end of the tensile testing machine; the bonding layer comprises an adhesive layer adhered to the surface of the steel plate and a double-sided adhesive layer adhered to the outer surface of the adhesive layer; and an auxiliary material layer at one end of the battery pole piece is adhered to the outer surface of the double-sided adhesive layer. The utility model discloses on can test the average peel strength of dressing layer and mass flow body, test dressing layer and mass flow body and freely peel off peak value peel strength's in the twinkling of an eye basis, effectively prevent to peel off the in-process and lead to its cracked condition to take place owing to damage the pole piece, peel off the test and accomplish the back, steel sheet surface adheres to glue and is clear easily, is convenient for use repeatedly, improves measuring accuracy and efficiency.
Description
Technical Field
The utility model relates to a lithium ion battery technical field especially relates to a peel strength accredited testing organization of lithium ion battery pole piece.
Background
The lithium ion battery has the outstanding advantages of high energy density, small environmental pollution, large power density, long service life, wide application range, small self-discharge coefficient and the like, is one of the most widely applied batteries in the world nowadays, and is also an important component part for new energy development. The lithium ion battery is obtained by filling a shell with electrolyte after a battery core is formed by positive and negative pole pieces and an isolating film; the positive and negative pole pieces also contain active substances, conductive agents, binders, collectors and other substances. The pole piece is of a sandwich structure, powder, namely a dressing layer, is coated on two sides, and an aluminum foil current collector is arranged in the middle. The binder is used for mutually binding the active substance playing a capacity role and the conductive agent playing a conductive role together and simultaneously binding the active substance playing a capacity role and the conductive agent on the current collector, so that the active substance and the conductive agent do not excessively expand or separate from the current collector in the processing process and the circulating process to cause the failure of the battery.
At present, few effective methods for measuring the adhesion between a powder material and a current collector are available, effective data cannot be provided for the design of a lithium ion battery, and the common method for measuring the peel strength between the powder and a base material comprises the following steps: fixing the front surface of a dressing layer of a lithium ion battery pole piece on a steel plate, pre-stripping the dressing layer of the lithium ion battery pole piece and the initial stripping end of a current collector, and then directly stripping the dressing layer by adopting a tensile testing instrument for testing.
The common stripping test mechanism mainly comprises a tensile test machine and a substrate combination, wherein the substrate combination comprises a steel plate and an adhesive layer; one end of the battery pole piece is adhered to the substrate assembly, the other end of the battery pole piece is connected with one action end of the tension tester, the steel plate is connected with the other action end of the tension tester, 180-degree stripping of the pole piece is realized by the action end fixed with the pole piece after the tension tester is started, the pole piece is directly adhered to the surface of the steel plate through the double-sided adhesive layer because the traditional adhesive layer is the double-sided adhesive layer, after stripping, the double-sided adhesive is adhered to the surface of the steel plate and is difficult to clear, and the precision of next stripping test is influenced.
The utility model discloses a to the technical defect who mentions in the background art, provide a lithium ion battery pole piece peel strength's accredited testing organization.
The utility model adopts the technical proposal that: a testing mechanism for the peeling strength of a lithium ion battery pole piece comprises a tensile testing machine and a substrate combination, wherein the substrate combination comprises a steel plate and an adhesive layer; one end of the battery pole piece is adhered to the substrate assembly, the other end of the battery pole piece is connected with one action end of the tensile testing machine, and the steel plate is connected with the other action end of the tensile testing machine; the bonding layer comprises an adhesive layer adhered to the surface of the steel plate and a double-sided adhesive layer adhered to the outer surface of the adhesive layer; and an auxiliary material layer at one end of the battery pole piece is adhered to the outer surface of the double-sided adhesive layer.
The middle upper part of the steel plate is a thick plate body, and the thickness of the thick plate body is 6 mm; the lower part of the steel plate is an extended thin plate body, and the thickness of the thin plate body is 2 mm.
The thick plate body and the thin plate body are in inclined surface transition, and the inclined angle of the inclined surface is 135-150 degrees.
The adhesive layer is a high-temperature adhesive tape layer.
The middle upper part of an adhesive layer in the adhesive layer is attached to the steel plate; the lower part of the adhesive layer is attached to the inclined plane.
The shape of the double-sided adhesive layer in the adhesive layer is matched with that of the adhesive layer.
Compared with the prior art, the utility model discloses on can test the average peel strength of dressing layer and mass flow body, test the dressing layer and the mass flow body is freely peeled off peak value peel strength's in the twinkling of an eye basis, effectively prevent to peel off the in-process and lead to its cracked condition to take place owing to damage the pole piece, peel off the test and accomplish the back, steel sheet surface adheres to the glue and is clear easily, is convenient for use repeatedly, improves measuring accuracy and efficiency.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a partial enlarged view of the present invention.
In the figure: the steel plate comprises a steel plate 1, a double-sided adhesive layer 2, an adhesive layer 3 and a pole piece 4.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1-2, the peel testing mechanism disclosed in the present invention comprises a tensile testing machine and a substrate assembly, wherein the substrate assembly comprises a steel plate and an adhesive layer, and the main improvement of the present invention is the substrate assembly. One end of the battery pole piece is adhered to the substrate assembly, the other end of the battery pole piece is connected with one action end of the tension tester, and the steel plate is connected with the other action end of the tension tester; the steel plate is characterized in that the bonding layer comprises an adhesive layer adhered to the surface of the steel plate and a double-sided adhesive layer adhered to the outer surface of the adhesive layer; and an auxiliary material layer at one end of the battery pole piece is adhered to the outer surface of the double-sided adhesive layer.
As a preferred technical scheme, as shown in figure 2, the middle upper part of the steel plate is a thick plate body, and the thickness of the thick plate body is 6 mm; the lower part of the steel plate is an extended thin plate body, and the thickness of the thin plate body is 2 mm. The thick plate body and the thin plate body are in inclined surface transition, and the inclined angle of the inclined surface is 135 plus 150 degrees. The internal angle of the modified 304 stainless steel plate is 150 degrees compared with other stripping methods. The inclined plane transition part ensures that a pole piece coating and a base material are not damaged when the pole piece is turned over for 180 degrees and stripped instantly, and effectively prevents the pole piece from being broken due to the fact that the instantaneous peak value of the pole piece is too large at the beginning.
According to the preferable technical scheme, the adhesive layer is a high-temperature adhesive tape layer, and after the peeling test is finished, the adhesive layer is easily removed by heating the steel plate. The middle upper part of an adhesive layer in the adhesive layer is attached to the steel plate; the lower part of the adhesive layer is attached to the inclined plane. The shape of the double-sided adhesive layer in the adhesive layer is matched with that of the adhesive layer.
The procedure for the peel test was as follows:
firstly, sticking a high-temperature adhesive tape 3 on a steel plate 1, and then sticking one surface of the double-sided adhesive tape 2 on the adhesive tape 3;
then the dressing layer of the lithium ion battery pole piece 3 is adhered to the other side of the double-sided adhesive tape 2;
rolling the dressing layer with the rubber roller for 10 times;
one end of a steel plate 1 is fixed at one working end of a tensile testing machine, and one end of the lithium ion battery pole piece length is fixed at the other working end of the tensile testing machine;
and starting a tensile testing machine to test to obtain the average peel strength of the maximum peel strength. Wherein, the pole piece 4 is peeled off at 180 degrees by the tensile testing instrument, and the peeling speed of the tensile testing instrument is 200 mm/min.
Claims (6)
1. A testing mechanism for the peeling strength of a lithium ion battery pole piece comprises a tensile testing machine and a substrate combination, wherein the substrate combination comprises a steel plate and an adhesive layer; one end of the battery pole piece is adhered to the substrate assembly, the other end of the battery pole piece is connected with one action end of the tensile testing machine, and the steel plate is connected with the other action end of the tensile testing machine; the steel plate is characterized in that the bonding layer comprises an adhesive layer adhered to the surface of the steel plate and a double-sided adhesive layer adhered to the outer surface of the adhesive layer; and an auxiliary material layer at one end of the battery pole piece is adhered to the outer surface of the double-sided adhesive layer.
2. The mechanism for testing the peeling strength of the lithium ion battery pole piece according to claim 1, wherein the middle upper part of the steel plate is a thick plate body, and the thickness of the thick plate body is 6 mm; the lower part of the steel plate is an extended thin plate body, and the thickness of the thin plate body is 2 mm.
3. The mechanism of claim 2, wherein the thick plate and the thin plate are in a slope transition, and the slope angle of the slope is 135-150 °.
4. The mechanism of claim 1, wherein the adhesive layer is a high temperature adhesive tape layer.
5. The mechanism for testing the peel strength of a lithium ion battery pole piece according to claim 3, wherein the middle upper part of the adhesive layer in the adhesive layer is attached to the steel plate; the lower part of the adhesive layer is attached to the inclined plane.
6. The mechanism for testing the peel strength of a lithium ion battery pole piece according to claim 5, wherein the shape of the double-sided adhesive layer in the adhesive layer is matched with the shape of the adhesive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120195443.6U CN214472679U (en) | 2021-01-25 | 2021-01-25 | Testing mechanism for peeling strength of lithium ion battery pole piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120195443.6U CN214472679U (en) | 2021-01-25 | 2021-01-25 | Testing mechanism for peeling strength of lithium ion battery pole piece |
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| CN214472679U true CN214472679U (en) | 2021-10-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184544A (en) * | 2021-12-24 | 2022-03-15 | 江苏锋芒复合材料科技集团有限公司 | Sample piece for testing peel strength of paper-based material, manufacturing method and testing method |
| CN114199760A (en) * | 2021-12-21 | 2022-03-18 | 星恒电源股份有限公司 | Method for testing peeling strength of lithium ion battery pole piece |
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2021
- 2021-01-25 CN CN202120195443.6U patent/CN214472679U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199760A (en) * | 2021-12-21 | 2022-03-18 | 星恒电源股份有限公司 | Method for testing peeling strength of lithium ion battery pole piece |
| CN114184544A (en) * | 2021-12-24 | 2022-03-15 | 江苏锋芒复合材料科技集团有限公司 | Sample piece for testing peel strength of paper-based material, manufacturing method and testing method |
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