CN214503312U

CN214503312U - Structure for rapidly evaluating adhesive force of adhesive

Info

Publication number: CN214503312U
Application number: CN202023080205.5U
Authority: CN
Inventors: 屈仁杰; 李洋
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-10-26
Anticipated expiration: 2030-12-18

Abstract

The utility model discloses a structure for aassessment binder adhesion fast, including the substrate layer, be fixed with first foil layer on the substrate layer, the coating has the binder coating on the first foil layer, the binder coating coats and is stamped the second foil layer, has solved the problem that the loaded down with trivial details binder membrane of test procedure that prior art exists is broken easily.

Description

Structure for rapidly evaluating adhesive force of adhesive

Technical Field

The utility model relates to a in lithium ion battery detection area, concretely relates to a structure for aassessment binder adhesion fast.

Background

The lithium battery pole piece generally comprises four materials, namely an electrode active substance, a conductive agent, a binder and a foil current collector, wherein the binder mainly serves to bind the active substance, the conductive agent and the foil current collector, and the active substance and the conductive agent are guaranteed not to fall off from the foil current collector in the charging and discharging processes. The performance of the battery is directly affected by the binder, so that the screening of the binder is very important.

When the adhesive is primarily screened, whether the adhesive force can meet the requirement is usually firstly seen, and the evaluation of the adhesive force in the prior art is usually to coat after pulping, roll and then take a pole piece to test the stripping force. In the binder primary screening stage, the testing process is complicated, manpower, materials and resources are wasted, and the binder film is easily broken when the binder film is simply pulled.

SUMMERY OF THE UTILITY MODEL

The utility model provides a structure for aassessment binder adhesion fast has solved the problem that the loaded down with trivial details binder membrane of test process that prior art exists was broken easily.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides a structure for aassessment binder power fast, includes the substrate layer, be fixed with first foil layer on the substrate layer, the coating has the binder coating on the first foil layer, the binder coating coats and is stamped the second foil layer.

Preferably, the thickness of the binder coating is 50-600 μm.

Preferably, the thickness of the adhesive coating is 400-500 μm.

Preferably, the binder of the binder coating is a mixture of one or more of CMC, PAA, NaPAA, sodium alginate, PVDF, LiPAA, PTFE and SBr.

Preferably, the substrate layer is a flat plate-shaped material.

Preferably, the substrate layer is a glass plate.

Preferably, the length of the first foil layer and the second foil layer is 5-100 cm, and the width of the first foil layer and the second foil layer is 0.5-30 cm.

Preferably, the first and second foil layers are 10cm in length and 10cm in width.

Preferably, the first foil layer and the second foil layer are selected from one of carbon-coated copper foil, carbon-coated aluminum foil or aluminum foil.

Preferably, the first foil layer is bonded and fixed on the substrate layer.

When the structure for rapidly evaluating the adhesive force of the adhesive is prepared, firstly, a glass plate is taken, two foils are cut, water, ethanol and other liquid are sprayed on the glass plate, one foil is absorbed on the glass plate, and the periphery of the foil is bonded with the glass plate by blue gel to prepare a first foil layer; placing a film scraper at the front end of the first foil layer, slightly pulling down the film scraper by both hands at a constant speed according to both sides of the film scraper, and coating a layer of adhesive coating on the first foil layer; the thickness of the coating is 50-600um, preferably 400-500um, and another foil is covered on the adhesive coating after the coating is finished to obtain a second foil layer. Rolling from top to bottom by a manual rolling roller, wherein the weight of the rolling roller is 2-6Kg, preferably 4-5Kg, so that the first foil layer and the second foil layer are fully adhered by the adhesive coating, pressing the upper foil layer by a glass plate after the completion, and testing the peeling force of the cut-parts after the intermediate adhesive is fully dried.

Compared with the prior art, the utility model, have following advantage:

the first foil layer, the second foil layer and the adhesive coating of the cutting piece are subjected to a peeling experiment, so that the peeling force between the first foil layer and the second foil layer is obtained, the testing method is simple and convenient, the adhesive is screened at the initial stage of battery development, and a certain guiding effect is provided for product development and battery formula design;

the method can measure the adhesive force between the adhesive and different substrates, and the double-sided foil layer can also effectively avoid the problem that the film is broken when the adhesive film is simply pulled.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Reference numbers and corresponding part names in the drawings:

1. a substrate layer; 2. a first foil layer; 3. a binder coating; 4. a second foil layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail with reference to the following embodiments, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not intended as limitations of the present invention.

Examples

As shown in fig. 1, a structure for rapidly evaluating the adhesive force of an adhesive is that a glass plate is taken as a substrate layer 1, two foils are cut, liquids such as water, ethanol and the like are sprayed on the glass plate, one foil is absorbed on the glass plate, and the periphery of the foil is bonded with the glass plate by blue gel to prepare a first foil layer 2; placing a film scraper at the front end of the first foil layer 2, slightly pulling down the film scraper by both hands at a constant speed according to both sides of the film scraper, and coating a layer of adhesive coating 3 on the first foil layer 2; the thickness of the coating film is 50-600um, preferably 400-500um, and another piece of foil material is covered on the adhesive coating 3 after the coating film is finished, so as to obtain a second foil material layer 4. Rolling and grinding from top to bottom by a manual rolling roller, wherein the weight of the rolling and grinding roller is 2-6Kg, preferably 4-5Kg, so that the first foil layer 2 and the second foil layer 4 are fully adhered by the adhesive coating 3, pressing the upper foil layer by a glass plate after the completion, and testing the stripping force of the cut-parts after the intermediate adhesive is fully dried.

Preferably, the binder of the binder coating 3 is a mixture of one or more of CMC, PAA, NaPAA, sodium alginate, PVDF, LiPAA, PTFE and SBr.

Further, the substrate layer 1 may be selected from other flat-surface plate-like materials except for the glass plate.

Preferably, the first foil layer 2 and the second foil layer 4 have a length of 5 to 100cm and a width of 0.5 to 30 cm.

Preferably, the first and second foil layers 2, 4 are 10cm in length and 10cm in width.

Preferably, the first foil layer 2 and the second foil layer 4 are selected from one of a carbon-coated copper foil, a carbon-coated aluminum foil, or an aluminum foil.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a structure for quick aassessment binder power, includes substrate layer (1), its characterized in that, be fixed with first foil layer (2) on substrate layer (1), the coating has adhesive coating (3) on first foil layer (2), adhesive coating (3) coats and is stamped second foil layer (4).

2. The structure for rapidly evaluating adhesive bonding force according to claim 1, wherein the thickness of the adhesive coating is 50 to 600 μm.

3. The structure for rapidly evaluating the adhesion of an adhesive according to claim 2, wherein the thickness of the adhesive coating is 400-500 μm.

4. The structure for rapid evaluation of adhesive bonding force according to claim 1, wherein the substrate layer (1) is a flat-surfaced plate-like material.

5. The structure for rapid assessment of adhesive bonding force according to claim 4, characterized in that the substrate layer (1) is a glass plate.

6. A structure for rapid assessment of adhesive bonding according to claim 1 characterized in that the first foil layer (2) and the second foil layer (4) have a length of 5 to 100cm and a width of 0.5 to 30 cm.

7. A structure for rapid assessment of adhesive bonding according to claim 1 characterized in that the first foil layer (2) and the second foil layer (4) have a length of 10cm and a width of 10 cm.

8. A structure for rapid assessment of adhesive bonding according to claim 1 characterized in that the first foil layer (2) and the second foil layer (4) are selected from one of carbon coated copper foil, carbon coated aluminum foil or aluminum foil.

9. A structure for rapid assessment of adhesive bonding according to claim 1 characterized in that said first foil layer (2) is adhesively fixed to the substrate layer (1).