CN117288662B - Corrosion resistance testing method for aluminum plastic film electrolyte - Google Patents

Abstract

The application relates to a corrosion resistance test method for an aluminum plastic film electrolyte, which relates to the field of aluminum plastic film tests and aims to solve the problems that the manual cutting by an art designing knife is easy to cause uneven cutting and has potential safety hazards, and the method comprises the following steps: cutting, soaking, cooling, wiping and cutting the sample: placing the wiped sample strip on the supporting plate, and simultaneously placing the previous flattened sample strip on the dividing bottom plate and pressing by using a dividing fixing plate; the driving baffle moves downwards to drive the pressing plate to move downwards so as to flatten the sample strip on the supporting plate, the driving baffle moves downwards to drive the linkage inclined block to move downwards, and the linkage inclined block moves downwards to drive the dividing driving block to move so as to drive the dividing knife to move along the horizontal direction to divide a part of the sample strip along the length direction; and (5) testing. The application has the effect of improving the safety and standardization of the detection of the aluminum plastic film composite material.

Description

Corrosion resistance testing method for aluminum plastic film electrolyte

Technical Field

The application relates to the field of aluminum plastic film detection, in particular to a corrosion resistance test method for an aluminum plastic film electrolyte.

Background

In recent years, along with the increase of lithium battery technology and yield, the demand of lithium battery packaging materials is also increasing, and besides the traditional steel shell or metal shell, the soft-package aluminum-plastic film packaging material is also an important mode of battery packaging, and has become the mainstream of application development of lithium battery packaging materials in the future.

The traditional aluminum plastic film is basically composed of an outer protective layer, a middle barrier layer and an inner heat sealing layer, wherein the layers are adhered by an adhesive, the inner layer is cast polypropylene (CPP), the middle layer is aluminum foil (AL), nylon (PA) is generally selected for compounding the outer protective layer, polyethylene terephthalate (PET) is selected for reinforcing compounding the outer PA, the barrier property and the friction resistance of the composite material are improved, and the aluminum plastic film composite material increasingly tends to develop in the multifunctional direction.

However, in the research and development process, the aluminum-plastic film composite material needs to be manually segmented by a blade to test the peeling strength of the PP/AL, and the segmentation is easy to cause uneven segmentation and has potential safety hazard by manually segmenting by the blade, so the method needs to be improved.

Disclosure of Invention

In order to improve the safety and standardization of aluminum-plastic film composite material detection, the application provides a corrosion resistance test method for an aluminum-plastic film electrolyte.

In a first aspect, the corrosion-resistant stripping equipment for the aluminum plastic film electrolyte provided by the application adopts the following technical scheme: the corrosion-resistant stripping equipment for the aluminum-plastic film electrolyte comprises a frame, wherein one side of the frame is provided with a flattening mechanism, the other side of the frame is provided with a dividing mechanism, the flattening mechanism comprises a supporting plate, a flattening plate and a flattening driving piece, the supporting plate is arranged on the frame, the flattening plate is connected to the frame in a sliding manner and is positioned above the supporting plate, and the flattening driving piece is arranged on the frame and drives the flattening plate to slide so as to flatten the aluminum-plastic film on the supporting plate; the cutting mechanism comprises a cutting bottom plate, a cutting knife, a cutting fixing plate and a cutting driving piece, wherein the cutting bottom plate is arranged on the frame, the cutting knife is arranged above the cutting bottom plate in a sliding mode, the cutting fixing plate is arranged on the frame in a sliding mode to compress the aluminum plastic film, and the cutting driving piece is arranged on the frame and drives the cutting knife to slide.

By adopting the technical scheme, when the test strips with different variables are required to be detected, an operator places the wiped test strip on the supporting plate, and places the other flattened test strip on the dividing bottom plate; the flattening driving piece is used for driving the flattening plate to slide so as to flatten the aluminum-plastic film on the supporting plate, the dividing fixing plate is used for compressing the aluminum-plastic film, and the dividing driving piece is used for driving the dividing cutter to slide so as to divide and peel the aluminum-plastic film; the situation that the sample strip is divided unevenly due to the fact that the dividing knife is moved manually when the hand presses the sample strip is reduced, and safety in the aluminum plastic film peeling operation is improved due to the fact that the sample strip is divided mechanically.

Optionally, the flattening driving piece includes drive accessory plate, drive accessory rod and drive baffle, drive accessory plate installs in the frame and is located the backup pad top, drive accessory plate is run through to the one end of drive accessory rod, the one end that the drive accessory rod is close to the backup pad links to each other with the flattening board, the one end that the backup pad was kept away from to the drive accessory rod links to each other with the drive baffle, flattening board and drive baffle are located the both sides of drive accessory plate respectively.

By adopting the technical scheme, when the sample strip is placed on the supporting plate, an operator can press the driving baffle by hands, and at the moment, the driving baffle drives the driving auxiliary rod to move so as to enable the flattening plate to move to the lowest distance, and then the sample strip on the supporting plate is flattened; at this time, the part of the test strip which is possibly bent in the early wiping process is restored to be flat again under the matching of the pressing plate and the supporting plate.

Optionally, an auxiliary spring is sleeved on the driving auxiliary rod, and two ends of the auxiliary spring are respectively abutted against the driving baffle plate and the driving auxiliary plate; one side of the driving baffle is provided with a connecting rod group, one end of the connecting rod group, which is far away from the driving baffle, is provided with an upper ejector rod, and the upper ejector rod is positioned below the supporting plate; the ejector plate is characterized in that an ejector groove is formed in the top of the support plate, an ejector plate flush with the top wall of the support plate is arranged in the ejector groove, the ejector plate is connected to the support plate in a sliding mode, and the upper ejector rod can penetrate through the support plate to eject the ejector plate out of the ejector groove.

Through adopting above-mentioned technical scheme, under the state of not exerting force to the drive baffle, the one end that the ejector pin kept away from the connecting rod group can run through the backup pad with the ejector pin jack-up to make the ejector pin be higher than the height of backup pad, outstanding ejector pin around the test strip this moment, so that the operating personnel will be taken away by the test strip of flattening. When the sample strip is placed on the supporting plate and needs to be flattened, an operator presses the driving baffle plate by hands, meanwhile, the ejector rod and the driving baffle plate move downwards synchronously under the action of the connecting rod group, and when the ejector rod is separated from the ejector groove, namely, the gap between the ejector rod and the ejector plate is increased, the driving baffle plate moves downwards continuously to flatten the sample strip finally; the setting of liftout plate is convenient for the operating personnel to take off the sample strip, can help the gland plate to reset after auxiliary spring loses pressure simultaneously.

Optionally, the dividing driving piece comprises a dividing driving block, a dividing limiting block and a dividing reset spring, a sliding bottom plate is arranged at the bottom of the frame, a sliding limiting groove is formed in the sliding bottom plate along the moving direction of the dividing knife, the dividing limiting block is arranged in the sliding limiting groove in a sliding mode, the dividing reset spring is arranged in the sliding limiting groove, one end of the dividing reset spring is connected with the inner side end wall of the sliding limiting groove, and the other end of the dividing reset spring is connected with the dividing limiting block; the cutting limiting block is connected with the cutting driving block, the top wall of the cutting driving block is obliquely downwards arranged along the direction of the flattening mechanism towards the cutting mechanism, one end of the connecting rod group, which is far away from the driving baffle, is also provided with a linkage inclined block, and the bottom wall of the linkage inclined block is always attached to the top wall of the cutting driving block; the dividing driving block is connected with the dividing knife.

By adopting the technical scheme, when the test sample strips with different variables are required to be detected, an operator places the wiped test sample strip on the ejector plate to wait for flattening, and places another flattened test sample strip on the partition bottom plate. One hand of an operator presses down the division fixing plate to enable the sample bars to be pressed on the division bottom plate, the other hand presses the driving baffle plate, and the pressing plate moves down to flatten the sample bars on the supporting plate; simultaneously, the linkage inclined block moves downwards to enable the dividing driving block to slide to one side close to the flattening mechanism, and the dividing driving block drives the dividing knife to divide the sample strip compressed by the dividing fixing plate; the driving force of the flattening driving piece is utilized to drive the linkage oblique block to apply force to the division driving piece, so that the division cutter synchronously cuts the sample strip, namely, a power source is adopted, flattening and division can be synchronously carried out, part of test time is combined, and the working efficiency is improved.

Optionally, the one end that the segmentation bottom plate kept away from flattening mechanism is provided with the locating plate, one side that the locating plate is close to the segmentation cutting knife is provided with embedded breach, the segmentation cutting knife can retract to in the embedded breach.

By adopting the technical scheme, the positioning plate enables the sample strip to quickly find the placement position, and meanwhile, the dividing knife is embedded in the embedded notch in the non-working state; the occurrence of the condition that the sample strip contacts with the dividing knife when the dividing knife is aligned is reduced, and the safety of test operation is improved.

Optionally, one end of cutting apart the fixed plate and keeping away from the locating plate is provided with the guide plate, the guide plate is close to cutting apart the bottom plate, and is close to one side of locating plate and be provided with the guide inclined plane, cut apart the bottom plate and offered the guide hole that supplies the guide plate to insert and establish.

Through adopting above-mentioned technical scheme, cut apart the fixed plate in-process that moves down, lead the inclined plane and lead the direction of righting of sample strip to the locating plate, when the sample strip conflict on the locating plate, lead the inclined plane part of leading of righting plate and have inserted to lead in the righting hole.

In a second aspect, the corrosion resistance testing method for the aluminum plastic film electrolyte provided by the application adopts the following technical scheme:

a corrosion resistance test method for an aluminum plastic film electrolyte comprises the following steps:

Cutting a sample: cutting a sample strip with a required size;

Soaking: placing the sample strip in a container with electrolyte, heating to a specified temperature, continuously soaking for a specified time, and taking out;

And (5) cooling and wiping: cooling to room temperature, taking out the test strip from the container, wiping off the surface electrolyte, and washing and wiping the test strip with tap water; segmentation: placing the wiped sample strip on the supporting plate, and simultaneously placing the previous flattened sample strip on the dividing bottom plate and pressing by using a dividing fixing plate; the driving baffle moves downwards to drive the pressing plate to move downwards so as to flatten the sample strip on the supporting plate, the driving baffle moves downwards to drive the linkage inclined block to move downwards, and the linkage inclined block moves downwards to drive the dividing driving block to move so as to drive the dividing knife to move along the horizontal direction to divide a part of the sample strip along the length direction;

And (3) testing: and respectively clamping two ends of the sample strip dividing part on an upper clamp and a lower clamp of the test equipment, setting the stretching speed, and recording the average value of the stripping force curve force values in the stripping process of the sample strip when the upper clamp and the lower clamp are mutually far away.

Optionally, in the soaking step, the water content of the electrolyte is 0-6000ppm, the designated temperature is 75-95 ℃ and the designated time is 2-90 days.

Optionally, in the soaking step, the sample strip is placed in a container with a certain volume, the container can be one or a combination of a sealing tank body of a polytetrafluoroethylene carrying sealing cover or an aluminum plastic film sealing bag body, and the material model of the aluminum plastic film sealing bag body is the same as the material model of the sample strip to be tested; in the corrosion resistance test by the sealed inclusion, the liquid in the sealed inclusion can be poured out after the test is finished, and the second-seal test is carried out.

Optionally, in the step test, the stretching speed set value is in a range of 100-500mm/min.

By adopting the technical scheme, when the stripping equipment is used for reducing the situation that the sample strip is unevenly segmented due to the fact that the cutting knife is manually moved when the hand presses the sample strip, the safety of the aluminum plastic film stripping operation is improved by mechanically cutting the sample strip.

The electrolyte adopts no water and water to carry out a comparison test, so that the stable application of blocking water vapor from penetrating through the lower aluminum plastic film can be examined for a long time; secondly, short, medium and long time scales are adopted to examine electrolyte resistance in the test process, so that the time scale stability of the aluminum plastic film is examined more comprehensively; finally, the aluminum plastic film sealing bag body 10 and the polytetrafluoroethylene sealing tank body 9 are adopted to carry out multi-type container test, so that the stability investigation of multiple scenes on the aluminum plastic film can be realized. The multi-factor, multi-scale and multi-scene electrolytic resistance test investigation is carried out on the aluminum plastic film, the test result is more comprehensive, and the long-term safety of predicting the electrolyte resistance and corrosion resistance of the aluminum plastic film is more objective.

In summary, the present application includes at least one of the following beneficial technical effects:

1. When the test strips with different variables are required to be detected, an operator places the wiped test strip on the supporting plate, and places the other flattened test strip on the dividing bottom plate; the flattening driving piece is used for driving the flattening plate to slide so as to flatten the aluminum-plastic film on the supporting plate, the dividing fixing plate is used for compressing the aluminum-plastic film, and the dividing driving piece is used for driving the dividing cutter to slide so as to divide and peel the aluminum-plastic film; the situation that the sample strip is unevenly segmented due to the fact that the dividing knife is manually moved when the hand presses the sample strip is reduced, and the safety of the aluminum plastic film stripping operation is improved due to the fact that the sample strip is mechanically divided;

2. The driving force of the flattening driving piece is utilized to drive the linkage inclined block to apply force to the splitting driving piece, so that the splitting cutter synchronously cuts the sample strip, namely, the flattening and the splitting can be synchronously carried out by adopting a power source, part of test time is combined, and the working efficiency is improved;

3. The electrolyte adopts no water and water to carry out a comparison test, so that the stable application of blocking water vapor from penetrating through the lower aluminum plastic film can be examined for a long time; secondly, short, medium and long time scales are adopted to examine electrolyte resistance in the test process, so that the time scale stability of the aluminum plastic film is examined more comprehensively; and finally, carrying out multi-type container test by adopting an aluminum plastic film sealing bag body and a polytetrafluoroethylene sealing tank body, so that the stability investigation of multiple scenes on the aluminum plastic film can be realized. The multi-factor, multi-scale and multi-scene electrolytic resistance test investigation is carried out on the aluminum plastic film, the test result is more comprehensive, and the long-term safety of predicting the electrolyte resistance and corrosion resistance of the aluminum plastic film is more objective.

Drawings

Fig. 1 is a schematic structural view of an aluminum plastic film electrolyte corrosion-resistant stripping device in an embodiment of the application.

Fig. 2 is a schematic structural view of a leveling mechanism in an embodiment of the present application.

Fig. 3 is a cross-sectional view for showing a positional relationship between the flattening mechanism and the dividing mechanism in the embodiment of the present application.

Fig. 4 is an enlarged schematic view of a in fig. 3.

Fig. 5 is an enlarged schematic view of B in fig. 3.

Fig. 6 is an enlarged schematic view of C in fig. 3.

FIG. 7 is a schematic view of a sizing container used in a test method for exhibiting electrolyte resistance and corrosion resistance of an aluminum plastic film in an embodiment of the application.

Fig. 8 is a schematic diagram of an amorphous container used in a test method for exhibiting electrolyte resistance and corrosion resistance of an aluminum plastic film in an embodiment of the application.

Reference numerals illustrate: 1. a frame; 11. a sliding bottom plate; 111. a sliding limit groove; 2. a support plate; 21. an ejection groove; 22. an ejector plate; 3. a flattening plate; 4. flattening the driving piece; 41. driving the auxiliary plate; 42. driving the auxiliary rod; 421. an auxiliary spring; 43. driving the baffle; 44. a connecting rod group; 45. an upper ejector rod; 46. a linkage oblique block; 5. dividing the bottom plate; 51. a positioning plate; 511. a notch is embedded; 52. a pilot hole; 6. a dividing knife; 7. dividing the fixing plate; 71. a guide plate; 711. guiding the inclined plane; 8. dividing the driving piece; 81. dividing the driving block; 82. dividing a limiting block; 83. dividing the reset spring; 9. sealing the tank body; 91. sealing cover; 10. sealing the bag body; 101. sealing the mouth.

Detailed Description

The application is described in further detail below with reference to fig. 1-8.

The embodiment of the application discloses corrosion-resistant stripping equipment for an aluminum plastic film electrolyte. Referring to fig. 1, the corrosion-resistant stripping apparatus for an aluminum-plastic film electrolyte comprises a frame 1, wherein the frame 1 is formed by welding a plurality of stainless steel pipes and a plurality of rectangular plates, in fig. 1, part of the stainless steel pipes are deleted to clearly show the internal structure of the apparatus, the frame 1 can be directly placed on a workbench of a laboratory, one side of the frame 1 is provided with a flattening mechanism, and the other side is provided with a dividing mechanism. After the operator flattens the dried sample strip through the flattening mechanism, the sample strip is partially segmented by the segmentation mechanism so as to test the peeling strength of the PP/AL by the tensile testing machine.

Referring to fig. 1 and 2, the flattening mechanism includes a support plate 2, the support plate 2 is fixed to a frame 1 by welding, and a gap exists between the support plate 2 and the ground. The outer lane of backup pad 2 is provided with keeps off the frame, when the sample strip was placed on backup pad 2, keeps off frame and sample strip clearance fit.

The flattening mechanism further comprises a flattening driving member 4, the flattening driving member 4 comprises a driving auxiliary plate 41, the side wall of the driving auxiliary plate 41 is welded on the frame 1, and the driving auxiliary plate 41 is positioned right above the supporting plate 2 with a gap. The drive auxiliary plate 41 is provided with a through hole, a drive auxiliary rod 42 is arranged in the through hole in a sliding manner, one end, close to the support plate 2, of the drive auxiliary rod 42 is welded with the platen plate 3, one end, far away from the support plate 2, of the drive auxiliary rod 42 is welded or in threaded connection with a drive baffle 43, and the platen plate 3 and the drive baffle 43 are respectively located on two sides of the drive auxiliary plate 41.

One end of the driving auxiliary rod 42 close to the driving baffle 43 is sleeved with an auxiliary spring 421, one end of the auxiliary spring 421 is abutted against the driving baffle 43, and the other end is abutted against the driving auxiliary plate 41, and in other embodiments, two ends of the auxiliary spring 421 can be fixed on the driving baffle 43 and the driving auxiliary plate 41 respectively through gluing.

In a state where the driving shutter 43 is not biased, the auxiliary spring 421 has an elastic force such that the distance between the platen 3 and the support plate 2 is larger than the thickness of the sample strip. When the sample strip is placed on the support plate 2, the operator can press the driving baffle 43 by hand, and at this time, the driving baffle 43 drives the driving auxiliary rod 42 to move so as to move the pressing plate 3 to the minimum distance to press the sample strip on the support plate 2 flat. In order to reduce the impact of the flattening mechanism on the tensile test during flattening, the distance between the flattening plate 3 and the support plate 2 is equal to the thickness of the test strip when the flattening plate 3 is moved to the lowest distance. In other embodiments, the driving assistance rod 42 may be directly connected to the cylinder without the driving assistance plate 41 and the driving baffle 43.

Referring to fig. 2, an ejector groove 21 is formed in the top wall of the support plate 2, the ejector groove 21 is located in the middle of the support plate 2, an ejector plate 22 is placed in the ejector groove 21, the top wall of the ejector plate 22 is flush with the top wall of the support plate 2, and the size of the ejector plate 22 is smaller than that of the sample strip. The bottom wall of the ejector plate 22 is provided with a plurality of guide rods, and one end of each guide rod, which is far away from the ejector plate 22, penetrates through the support plate 2. When it is desired to level the test strip, the operator places the test strip on the ejector plate 22.

One side of the driving baffle plate 43 is provided with a connecting rod group 44, the connecting rod group 44 consists of a plurality of round rods welded together, and the driving baffle plate 43 and the connecting rod group 44 are fixed through welding. The end of the connecting rod group 44 away from the driving baffle 43 is clamped with an upper ejector rod 45, and the upper ejector rod 45 is positioned right below the ejector plate 22.

In the state that the driving baffle 43 is not forced, one end of the upper ejector rod 45 far away from the connecting rod set 44 can penetrate through the supporting plate 2 to jack the ejector plate 22 so that the ejector plate 22 is higher than the supporting plate 2, and at the moment, the periphery of the test strip protrudes out of the ejector plate 22 so that an operator can take away the flattened test strip. When the sample strip is placed on the supporting plate 2 and needs to be flattened, an operator presses the driving baffle plate 43 by hands, meanwhile, the upper ejector rod 45 moves downwards synchronously with the driving baffle plate 43 under the action of the connecting rod group 44, and when the upper ejector rod 45 is separated from the ejection groove 21, namely, the gap between the upper ejector rod 45 and the ejection plate 22 is increased, the driving baffle plate 43 continues to move downwards to flatten the sample strip finally.

Referring to fig. 3 and 4, the dividing mechanism includes a dividing bottom plate 5, the dividing bottom plate 5 is fixed to the side wall of the frame 1 by welding, and a gap exists between the dividing bottom plate 5 and the test bed. One end of the partition bottom plate 5, which is far away from the flattening mechanism, is provided with a positioning plate 51, and the positioning plate 51 is vertically welded on the partition bottom plate 5; when the sample strip needs to be divided, one end of the sample strip is abutted against the side wall of the positioning plate 51, which is close to the flattening mechanism.

The division fixing plate 7 is provided above the division bottom plate 5, the division fixing plate 7 is slidably provided on the frame 1, the top wall of the division fixing plate 7 is connected with the flattening driving piece 4 having the same structure as the flattening plate 3 in the present embodiment, and the top wall of the division fixing plate 7 is connected with a cylinder to realize movement of the division fixing plate 7 in the vertical direction in other embodiments.

Referring to fig. 4 and 5, a guide plate 71 is vertically integrally formed at one end of the division fixing plate 7 far from the positioning plate 51, the distance between the guide plate 71 and the positioning plate 51 is equal to the length of the sample strip, a guide inclined surface 711 is arranged at one side of the guide plate 71 close to the division bottom plate 5 and close to the positioning plate 51, and a guide hole 52 for inserting the guide plate 71 is formed in the division bottom plate 5.

When the operator places the flattened sample strip on the dividing bottom plate 5, one end of the sample strip is attached to the side wall of the positioning plate 51, and at this time the dividing fixing plate 7 is moved down to press the sample strip against the dividing bottom plate 5. In the process of moving down the dividing and fixing plate 7, the guide inclined surface 711 guides the sample bar in the direction of the positioning plate 51, and when the sample bar abuts on the positioning plate 51, the guide inclined surface 711 portion of the guide plate 71 has been inserted into the guide hole 52. In order to reduce the influence of the division fixing plate 7 on the tensile test when the test strip is pressed, only one end of the division fixing plate 7 near the positioning plate 51 is in contact with the test strip, the contact length being set to 50mm in this embodiment, and in other embodiments, it may be set according to the length of division required for the test strip.

Referring to fig. 4 and 6, an embedded notch 511 is formed on a side wall of the positioning plate 51, which is close to the guide plate 71, a dividing knife 6 is arranged in the embedded notch 511, the length of the dividing knife 6 is larger than the width of the sample strip, and a dividing driving piece 8 is connected to the dividing knife 6 so as to enable the dividing knife 6 to reciprocate along the horizontal direction; after the sample bar is pressed by the division fixing plate 7, the division knife 6 is horizontally moved out of the in-line notch 511 to divide the sample bar by 50mm in the length direction of the sample bar.

The bottom of the frame 1 is welded with a sliding bottom plate 11, the dividing driving piece 8 comprises a dividing driving block 81 sliding on the sliding bottom plate 11, and one end, far away from the flattening mechanism, of the dividing driving block 81 is fixedly clamped with the dividing knife 6 through a connecting rod.

The bottom wall of the division driving block 81 is integrally formed with a division limiting block 82, the division limiting block 82 is in a dovetail shape or a convex shape, a sliding limiting groove 111 is formed in the sliding bottom plate 11, the sliding limiting groove 111 is formed along the direction of the flattening mechanism towards the division mechanism, and the division limiting block 82 is inserted into the sliding limiting groove 111 and can slide along the forming direction of the sliding limiting groove 111. A split return spring 83 is arranged in the sliding limiting groove 111, one end of the split return spring 83 is connected with the inner side end wall of the sliding limiting groove 111, and the other end is connected with the split limiting block 82; in order to improve the service life of the split return spring 83, a guide rod is inserted into the split return spring 83, two ends of the guide rod are embedded in the sliding bottom plate 11, and the guide rod penetrates the split limiting block 82.

The top wall of the dividing driving block 81 is arranged obliquely downward in the direction of the flattening mechanism toward the dividing mechanism, i.e., the height of the end of the dividing driving block 81 near the flattening mechanism is higher than the height of the end of the dividing driving block 81 near the dividing mechanism.

The linkage inclined block 46 is slidably arranged on the inclined top wall of the division driving block 81, the bottom wall of the linkage inclined block 46 is always attached to the top wall of the division driving block 81, and the linkage inclined block 46 is connected with one end, far away from the driving baffle 43, of the connecting rod group 44.

When test strips of different variables are to be tested, the operator places the wiped-down strip on ejector plate 22 awaiting flattening and places another flattened strip on dividing bottom plate 5. One hand of an operator presses down the division fixing plate 7 so that the sample bar is pressed against the division bottom plate 5, and the other hand presses the driving baffle 43, and the platen 3 moves down to flatten the sample bar on the support plate 2; at the same time, the linkage inclined block 46 moves downwards to enable the dividing driving block 81 to slide towards the side close to the flattening mechanism, and the dividing driving block 81 drives the dividing knife 6 to divide the sample strip compressed by the dividing fixing plate 7.

The implementation principle of the corrosion-resistant stripping equipment for the aluminum plastic film electrolyte provided by the embodiment of the application is as follows: after the operator flattens the dried sample strip through the flattening mechanism, the sample strip is partially segmented by the segmentation mechanism so as to test the peeling strength of the PP/AL by the tensile testing machine; the situation that the sample strip is unevenly segmented due to the fact that the dividing knife 6 is manually moved when the hand presses the sample strip is reduced, and safety in the aluminum plastic film stripping operation is improved due to the fact that the sample strip is mechanically divided.

The embodiment of the application also discloses a corrosion resistance test method of the aluminum plastic film electrolyte. The corrosion resistance test method of the aluminum plastic film electrolyte comprises the following steps:

Cutting a sample: respectively cutting 15mm test strips along the TD/MD (TD/MD represents the length and the width) direction of a sample; in this embodiment, the sample strip is selected to have a thickness dimension of 113um.

Soaking: the test strip was placed in a container with electrolyte, heated to a specified temperature, and continuously immersed for a specified time and then removed.

Referring to fig. 7 and 8, in the embodiment, one or a combination of a sealed tank 9 with a sealing cover 91 made of polytetrafluoroethylene and an aluminum plastic film sealed bag 10 can be selected, the material model of the aluminum plastic film sealed bag 10 is the same as the material model of a sample strip to be tested, wherein the sealed tank 9 with the sealing cover 91 is a shaping container, and the aluminum plastic film sealed bag 10 is an amorphous container; in the corrosion resistance test of the sealed bag body 10, after the test is finished, the liquid in the sealed bag body 10 can be poured out, and a secondary sealing test (PP/PP peeling strength) is carried out, wherein the specific steps are described in QB/T2358-1998 "test method for heat sealing strength of plastic film packaging bags".

The electrolyte has a moisture content of 0 to 6000ppm, and in this embodiment the electrolyte is selected to have a moisture content of 0ppm, 1000ppm for testing or combination testing.

The temperature to be heated to the specified temperature is selected in the range of 75-95 c, preferably 80-85 c. The temperature in this embodiment is chosen to be 80 ℃.

The soaking time in the electrolyte can be selected from 2h, 4h, 6h, 24h, 48h, 7 days, 30 days, 60 days and 90 days or more. The 4h, 24h and 90 days of this embodiment are chosen to be short, medium and long time scales.

And (5) cooling and wiping: cooling to room temperature, taking out the test strip from the container, wiping off the surface electrolyte, and washing and wiping the test strip with tap water;

Segmentation: when test strips of different variables are to be tested, the operator places the wiped-off strip on the ejector plate 22 and another flattened strip on the dividing bottom plate 5.

When the flattened sample strip is placed on the dividing bottom plate 5, one end of the sample strip is attached to the side wall of the positioning plate 51, and one hand of an operator presses down the dividing fixing plate 7; in the process of pressing down the dividing and fixing plate 7, the guide inclined surface 711 guides the sample strip to the direction of the positioning plate 51, and when the sample strip is abutted against the positioning plate 51, the guide inclined surface 711 of the guide plate 71 is partially inserted into the guide hole 52; at this time, the sample bar is pressed against the division bottom plate 5 by the division fixing plate 7.

The other hand of the operator presses the driving shutter 43, and the platen 3 moves down to flatten the specimen strip on the support plate 2; simultaneously, the linkage inclined block 46 moves downwards to enable the dividing driving block 81 to slide to the side close to the flattening mechanism, and the dividing driving block 81 drives the dividing knife 6 to divide the PP and AL into 50mm along the length direction of the sample strip to be compressed by the dividing fixing plate 7.

When the sample strip to be segmented is segmented, the sample strip to be flattened is flattened; the two hands of the operator are simultaneously loosened, the pressing plate 3 moves upwards under the elastic action of the auxiliary spring 421 and the dividing return spring 83, the upper ejector rod 45 ejects the ejector plate 22 from the ejector slot 21, and the dividing driving block 81 drives the dividing knife 6 to return to the embedded notch 511. The operator takes down the sample bar after the division and prepares for the next process, places the flattened sample bar on the division bottom plate 5, places the dried sample bar on the ejector plate 22, and repeats the above steps to prepare for the division before the test.

And (3) testing: and respectively clamping the two ends of the sample along the stripping part on an upper clamp and a lower clamp of the computer desktop tensile testing machine.

The adhesive zone is pulled away from the stretching direction in a T-shape, the test speed is set, the set value of the stretching speed is 100-500mm/min, preferably 200-300mm/min, and 300mm/min is selected in this embodiment.

The distance between the clamps is 50mm, the average value of the force value of the stripping force curve in the stripping process of the sample is recorded, and three effective digits are recorded.

And (3) performance detection:

The above variables are matched in this embodiment as follows:

Selecting a polytetrafluoroethylene sealing tank body 9 with a sealing cover 91 for observing the corrosion resistance stability of electrolyte in a short time scale (4 h) and a long time scale (90 days);

And selecting the aluminum plastic film sealing bag body 10 for observing the corrosion resistance stability of the electrolyte in a medium time scale (24 h).

The electrolyte water content is 0ppm, and the stability observation of electrolyte resistance is carried out on a short time scale (4 h) and a medium time scale (24 h); electrolyte moisture content of 1000ppm was observed for electrolyte resistance stability on a medium time scale (24 h) and a long time scale (90 days).

The heating temperature in the soaking step is 80 ℃, and the stretching speed in the testing step is 300mm/min.

Table 1: peel force curve force value for PP/AL peel test

Table 2: peel force curve force value of PP/PP peel test

The implementation principle of the corrosion resistance test method of the aluminum plastic film electrolyte provided by the embodiment of the application is as follows: the use of the stripping equipment reduces the condition that the sample strip is unevenly segmented due to the fact that the dividing knife 6is manually moved when the hand presses the sample strip, and the safety of the aluminum plastic film stripping operation is improved due to the fact that the sample strip is mechanically divided.

The electrolyte adopts no water and water to carry out a comparison test, so that the stable application of blocking water vapor from penetrating through the lower aluminum plastic film can be examined for a long time; secondly, short, medium and long time scales are adopted to examine electrolyte resistance in the test process, so that the time scale stability of the aluminum plastic film is examined more comprehensively; finally, the aluminum plastic film sealing bag body 10 and the polytetrafluoroethylene sealing tank body 9 are adopted to carry out multi-type container test, so that the stability investigation of multiple scenes on the aluminum plastic film can be realized. The multi-factor, multi-scale and multi-scene electrolytic resistance test investigation is carried out on the aluminum plastic film, the test result is more comprehensive, and the long-term safety of predicting the electrolyte resistance and corrosion resistance of the aluminum plastic film is more objective.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (7)

1. An aluminum-plastic film electrolyte corrosion-resistant stripping device is characterized in that: the machine comprises a machine frame (1), wherein one side of the machine frame (1) is provided with a flattening mechanism, and the other side of the machine frame is provided with a dividing mechanism;

The flattening mechanism comprises a supporting plate (2), a flattening plate (3) and a flattening driving piece (4), wherein the supporting plate (2) is installed on the frame (1), the flattening plate (3) is connected to the frame (1) in a sliding mode and is located above the supporting plate (2), and the flattening driving piece (4) is installed on the frame (1) and drives the flattening plate (3) to slide so as to flatten an aluminum plastic film on the supporting plate (2);

The cutting mechanism comprises a cutting bottom plate (5), a cutting knife (6), a cutting fixing plate (7) and a cutting driving piece (8), wherein the cutting bottom plate (5) is installed on the frame (1), the cutting knife (6) is slidably arranged above the cutting bottom plate (5), the cutting fixing plate (7) is slidably arranged on the frame (1) to compress an aluminum plastic film, and the cutting driving piece (8) is installed on the frame (1) and drives the cutting knife (6) to slide; the flattening driving piece (4) comprises a driving auxiliary plate (41), a driving auxiliary rod (42) and a driving baffle plate (43);

The driving auxiliary plate (41) is arranged on the frame (1) and is positioned above the supporting plate (2);

one end of the driving auxiliary rod (42) penetrates through the driving auxiliary plate (41), one end, close to the supporting plate (2), of the driving auxiliary rod (42) is connected with the pressing plate (3), one end, far away from the supporting plate (2), of the driving auxiliary rod (42) is connected with the driving baffle plate (43), and the pressing plate (3) and the driving baffle plate (43) are respectively positioned on two sides of the driving auxiliary plate (41);

An auxiliary spring (421) is sleeved on the driving auxiliary rod (42);

both ends of the auxiliary spring (421) are respectively abutted against the driving baffle plate (43) and the driving auxiliary plate (41);

One side of the driving baffle plate (43) is provided with a connecting rod group (44), one end of the connecting rod group (44) far away from the driving baffle plate (43) is provided with an upper ejector rod (45), and the upper ejector rod (45) is positioned below the supporting plate (2);

an ejection groove (21) is formed in the top of the supporting plate (2), an ejection plate (22) which is flush with the top wall of the supporting plate (2) is arranged in the ejection groove (21), the ejection plate (22) is connected to the supporting plate (2) in a sliding manner, and the upper ejector rod (45) can penetrate through the supporting plate (2) to eject the ejection plate (22) out of the ejection groove (21);

The dividing driving piece (8) comprises a dividing driving block (81), a dividing limiting block (82) and a dividing reset spring (83);

The bottom of the frame (1) is provided with a sliding bottom plate (11), a sliding limit groove (111) is formed in the sliding bottom plate (11) along the moving direction of the dividing knife (6), the dividing limit block (82) is arranged in the sliding limit groove (111) in a sliding mode, the dividing return spring (83) is arranged in the sliding limit groove (111), one end of the dividing return spring (83) is connected with the inner side end wall of the sliding limit groove (111), and the other end of the dividing return spring is connected with the dividing limit block (82);

The cutting limiting block (82) is connected with the cutting driving block (81), the top wall of the cutting driving block (81) is obliquely downwards arranged along the direction of the flattening mechanism towards the cutting mechanism, one end of the connecting rod group (44) away from the driving baffle plate (43) is also provided with a linkage inclined block (46), and the bottom wall of the linkage inclined block (46) is always attached to the top wall of the cutting driving block (81); the dividing driving block (81) is connected with the dividing knife (6).

2. The corrosion-resistant stripping apparatus for an aluminum plastic film electrolyte according to claim 1, wherein: one end of the partition bottom plate (5) far away from the flattening mechanism is provided with a positioning plate (51), one side of the positioning plate (51) close to the partition knife (6) is provided with an embedded notch (511), and the partition knife (6) can retract into the embedded notch (511).

3. The corrosion-resistant peeling apparatus for an aluminum plastic film electrolyte according to claim 2, characterized in that: one end of the division fixing plate (7) far away from the locating plate (51) is provided with a guide plate (71), one side of the guide plate (71) close to the division bottom plate (5) and close to the locating plate (51) is provided with a guide inclined surface (711), and the division bottom plate (5) is provided with a guide hole (52) for inserting the guide plate (71).

4. A method for testing corrosion resistance of an aluminum plastic film electrolyte of a peeling apparatus according to claim 1, comprising the steps of:

Cutting a sample: cutting a sample strip with a required size;

Soaking: placing the sample strip in a container with electrolyte, heating to a specified temperature, continuously soaking for a specified time, and taking out;

And (5) cooling and wiping: cooling to room temperature, taking out the test strip from the container, wiping off the surface electrolyte, and washing and wiping the test strip with tap water;

Segmentation: placing the wiped sample strip on a supporting plate (2), and simultaneously placing the previous flattened sample strip on the dividing bottom plate (5) and pressing by a dividing fixing plate (7); the driving baffle (43) moves downwards to drive the pressing plate (3) to flatten the sample strip on the supporting plate (2), the driving baffle (43) moves downwards to drive the linkage inclined block (46) to move downwards, and the linkage inclined block (46) moves downwards to drive the dividing driving block (81) to move so as to drive the dividing knife (6) to move along the horizontal direction to divide a part of the sample strip along the length direction;

And (3) testing: and respectively clamping two ends of the sample strip dividing part on an upper clamp and a lower clamp of the test equipment, setting the stretching speed, and recording the average value of the stripping force curve force values in the stripping process of the sample strip when the upper clamp and the lower clamp are mutually far away.

5. The corrosion resistance test method for the aluminum plastic film electrolyte according to claim 4, which is characterized by comprising the following steps: in the soaking step, the water content of the electrolyte is 0-6000ppm, the designated temperature is 75-95 ℃ and the designated time is 2-90 days.

6. The corrosion resistance test method for the aluminum plastic film electrolyte according to claim 4, which is characterized by comprising the following steps: in the soaking step, a sample strip is placed in a container with a certain volume, the container can be one or a combination of a sealing tank body (9) of a polytetrafluoroethylene carrying sealing cover (91) or an aluminum plastic film sealing bag body (10), and the material model of the aluminum plastic film sealing bag body (10) is the same as the material model of the sample strip to be tested; in the corrosion resistance test by using the sealed bag body (10), the liquid in the sealed bag body (10) can be poured out after the test is finished, and the two-seal test is performed.

7. The corrosion resistance test method for the aluminum plastic film electrolyte according to claim 4, which is characterized by comprising the following steps: in the step test, the set value range of the stretching speed is 100-500mm/min.