CN111830324A

CN111830324A - Aluminum-plastic film insulation test structure and aluminum-plastic film insulation test method

Info

Publication number: CN111830324A
Application number: CN202010736580.6A
Authority: CN
Inventors: 刘璇; 蒋新欣; 许永顺; 徐健武
Original assignee: Huizhou Yiwei Energy Collection Co ltd
Current assignee: Huizhou Yiwei Energy Collection Co ltd; Eve Energy Co Ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2020-10-27

Abstract

The invention relates to an aluminum-plastic film insulation test structure and an aluminum-plastic film insulation test method.A direct-current power supply module is started to output 9V voltage by placing an aluminum-plastic film and a copper sheet in a solution disk containing a solution containing copper ions, if a PP (polypropylene) layer of the aluminum-plastic film has cracks, the solution containing the copper ions can permeate into an aluminum layer, the solution disk can generate oxidation reduction reaction at the moment, the copper ions can be separated out at the cracks under the condition of getting electrons, and finally a tester utilizes a two-dimensional microscope to carry out amplification observation on the aluminum-plastic film to be tested, so that the defect position of the aluminum-plastic film to be tested can be positioned; in addition, as the PP layer can not melt and be burnt to leave black spots, the defect position can be accurately positioned; moreover, even if the defect positions exist in multiple positions, a tester can accurately analyze the fatal defect positions according to the area size of copper deposition, and the error rate is reduced.

Description

Aluminum-plastic film insulation test structure and aluminum-plastic film insulation test method

Technical Field

The invention relates to the technical field of batteries, in particular to an aluminum-plastic film insulation test structure and an aluminum-plastic film insulation test method.

Background

Currently, a battery refers to a device that converts chemical energy into electrical energy in a portion of the space of a cup, tank, or other container or composite container that holds an electrolyte solution and metal electrodes to generate an electric current. Has a positive electrode and a negative electrode. With the advancement of technology, batteries generally refer to small devices that can generate electrical energy. Such as a solar cell. The performance parameters of the battery are mainly electromotive force, capacity, specific energy and resistance. The battery is used as an energy source, can obtain current which has stable voltage and current, is stably supplied for a long time and is slightly influenced by the outside, has simple structure, convenient carrying, simple and easy charging and discharging operation, is not influenced by the outside climate and temperature, has stable and reliable performance, and plays a great role in various aspects of modern social life.

The kinds of batteries are various, for example, a lithium pouch battery; as another example, a button cell; as another example, a pin cell. Taking a soft package lithium battery as an example, due to a plurality of advantages, the soft package lithium battery is applied to a plurality of fields, the most common mobile phone field is used, and most of the existing mobile phone batteries are soft package lithium batteries.

Most of the existing soft package lithium batteries are packaged by using an aluminum plastic film, and the aluminum plastic film is formed by sequentially stacking a PET (polyethylene terephthalate) layer, a nylon layer, an aluminum layer and a PP (polypropylene) layer. In order to guarantee soft packet of lithium cell's output quality, before soft packet of lithium cell formal production, all need carry out insulation test to soft packet of lithium cell, carry out insulation test to the plastic-aluminum membrane promptly, insulation test's reason lies in, if there is the crack in the PP layer in the plastic-aluminum membrane, the inside electrolyte of soft packet of lithium cell will be followed crack position and is located the infiltration and contact with the aluminium lamination, when soft packet of lithium cell during operation, soft packet of lithium cell's negative pole just switches on as conduction media and aluminium lamination through electrolyte, lead to soft packet of lithium cell's damage.

Therefore, in view of the above, the aluminum-plastic film of the soft package lithium battery needs to be subjected to insulation test, and the existing insulation test method utilizes one end of an insulation resistance tester to contact with the negative electrode of the soft package lithium battery, the other end of the insulation resistance tester to contact with the aluminum layer of the aluminum-plastic film, and then the insulation resistance tester outputs 2000V of high voltage breakdown, if a crack exists in the PP layer of the aluminum-plastic film, the electrolyte permeates into the aluminum layer, at this moment, a closed loop is formed, the crack position of the PP layer is melted and burned due to high temperature, and a breakdown black point is left, so that the unqualified insulation test of the soft package lithium battery can be judged at this moment, although the insulation test method can detect the soft package lithium battery, the defect still exists:

firstly, the insulation resistance tester needs to output 2000V high voltage, so that the high voltage has great danger to the personal safety of testers, if the testers operate improperly, the testers are likely to contact the high voltage to cause corresponding safety accidents, and the safety and reliability are poor;

secondly, if the PP layer has cracks, the cracks of the PP layer can be melted and burnt under the action of high pressure, and black spots are left, but due to the fact that the area of the black spots is too large, a tester cannot accurately position where the PP layer cracks at the bottom, and therefore follow-up testers cannot correspondingly adjust a production line;

thirdly, if there are many cracks in the PP layer, for example, if there are a crack, B crack and C crack in the PP layer at the same time, it is C crack, but since the a crack and B crack are closer to the high voltage contact position, i.e. the contact position of the insulation resistance tester and the aluminum layer of the aluminum-plastic film, the a crack and B crack will be broken down by high voltage and leave black spots, and the C crack will not, which results in erroneous judgment and higher error rate.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide an aluminum plastic film insulation test structure and an aluminum plastic film insulation test method which are high in safety and reliability, capable of accurately positioning to a defect point and low in error rate.

The purpose of the invention is realized by the following technical scheme:

an aluminum-plastic film insulation test structure, comprising:

sealing aluminum adhesive paper;

the aluminum-plastic film is provided with an edge sealing edge and a cutting edge, and the cutting edge is coated by the aluminum sealing gummed paper; and

the direct current power supply device comprises a direct current power supply module, a copper sheet, a solution disc, a probe piece and a negative electrode clamp, wherein a positive electrode output piece and a negative electrode output piece are arranged on the direct current power supply module, the copper sheet is arranged in the solution disc, the solution disc is used for containing solution containing copper ions, the probe piece is connected with the positive electrode output piece, the probe piece is used for puncturing the edge sealing of the aluminum plastic film, the negative electrode clamp is connected with the negative electrode output piece, and the negative electrode clamp is used for clamping the copper sheet.

In one embodiment, the probe member includes a positive connection line and a probe, one end of the positive connection line is connected to the positive output member, the other end of the positive connection line is connected to the probe, and the probe is configured to pierce the sealed edge of the aluminum-plastic film.

In one embodiment, the probe is provided with a sharp part at a position close to the aluminum-plastic film, and the sharp part is used for piercing the sealing edge of the aluminum-plastic film.

In one embodiment, the negative electrode clamp includes a negative electrode connecting wire and a negative electrode clamping piece, one end of the negative electrode connecting wire is connected to the negative electrode output member, the other end of the negative electrode connecting wire is connected to the negative electrode clamping piece, a plurality of negative electrode pressing teeth are arranged on the negative electrode clamping piece, and each negative electrode pressing tooth is used for clamping the copper sheet.

In one embodiment, two negative anti-slip protrusions are arranged on the negative clamping piece, and the two negative anti-slip protrusions are axially symmetrically distributed around the central axis of the negative clamping piece.

In one embodiment, the dc power supply device further includes two cushion strips, the two cushion strips are both disposed on the dc power supply module, and the two cushion strips are distributed in axial symmetry with the central axis of the dc power supply module.

In one embodiment, a plurality of anti-slip lines are arranged on each of the two cushion strips.

In one embodiment, the dc power supply device further includes a handle, and the handle is disposed on the dc power supply module.

In one embodiment, the dc power module is provided with a plurality of weight reduction slots.

An aluminum-plastic film insulation test method comprises the following steps:

step S01, obtaining a soft package lithium battery to be tested, sectioning the soft package lithium battery to be tested according to a preset sectioning path, and taking out a battery cell built in the soft package lithium battery to be tested to obtain an aluminum-plastic film, wherein the aluminum-plastic film is provided with an edge sealing edge and a sectioning edge;

step S02, wrapping the cut edges of the aluminum plastic film by using aluminum sealing adhesive tape;

step S03, piercing the edge seal of the aluminum-plastic film by using a probe piece, clamping a copper sheet by using a negative electrode clamp, and placing the aluminum-plastic film and the copper sheet in a solution tray containing a solution containing copper ions;

step S04, the direct current power supply module outputs a preset voltage value according to preset duration to obtain the aluminum-plastic film to be detected;

and S05, carrying out amplification observation on the aluminum-plastic film to be detected by using a two-dimensional microscope, and positioning the defect position of the aluminum-plastic film to be detected according to the copper precipitation position.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the invention relates to an aluminum-plastic film insulation test structure and an aluminum-plastic film insulation test method, when an insulation test needs to be carried out on an aluminum-plastic film, a probe piece is utilized to pierce the edge sealing of the aluminum-plastic film, a negative electrode clamp is used for clamping a copper sheet, placing the aluminum-plastic film and the copper sheet in a solution tray containing a solution containing copper ions, starting a direct current power supply module to output 9V voltage, if a PP layer of the aluminum-plastic film has cracks, then the solution containing copper ions will penetrate into the aluminum layer, at this time the solution disk will undergo redox reaction, copper ions will be precipitated at the position of the crack under the condition of getting electrons, finally the tester will utilize a two-dimensional microscope to carry out amplification observation on the aluminum-plastic film to be tested, the defect position of the aluminum-plastic film to be tested can be well positioned, and the safety and reliability of the tester cannot be endangered due to the fact that the direct-current power supply module outputs 9V low voltage; in addition, because the PP layer can not be melted and burnt to leave black spots, a tester can accurately position the defect position; moreover, even if the defect position has a plurality of positions, the testing personnel can also accurately analyze the fatal defect position according to the area size of the copper precipitation, and the error rate is greatly reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of an insulation test structure of an aluminum-plastic film according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an insulation test structure of an aluminum plastic film from another view angle according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of FIG. 1 at A;

FIG. 4 is a schematic structural diagram of a probe according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a negative clip according to an embodiment of the invention;

fig. 6 is a schematic flow chart illustrating steps of a soft-package lithium battery insulation testing method according to an embodiment of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that the aluminum plastic film is particularly important as a packaging structure of a soft package lithium battery. The aluminum-plastic film is formed by sequentially stacking a PET layer, a nylon layer, an aluminum layer and a PP layer, the soft package lithium battery needs to be subjected to insulation test before formal production of the soft package lithium battery, namely, the insulation test is carried out on the aluminum plastic film, for the same type of soft package lithium battery, as the soft package lithium battery is produced by the same equipment and the same set of production process, the consistency of the soft package lithium battery can be ensured, if the aluminum plastic film of one soft package lithium battery has poor insulation, generally means that the aluminum plastic films of the soft package lithium batteries in the same batch have poor insulation, therefore, a tester can select the aluminum plastic film of the soft package lithium battery as a test object, and if poor insulation occurs, the production process of the batteries in the batch corresponding to the soft package lithium battery with the problems needs to be adaptively adjusted, and the condition that the produced soft package lithium battery is poor in insulation is prevented. The reason for insulating test lies in, if there is the crack on the PP layer in the plastic-aluminum membrane, the inside electrolyte of soft packet of lithium cell will be followed crack position department infiltration and aluminium lamination contact, and when soft packet of lithium cell during operation, the negative pole of soft packet of lithium cell just switches on as conduction media and aluminium lamination through electrolyte, leads to the damage of soft packet of lithium cell.

In view of the above problems, in the existing insulation testing method, one end of an insulation resistance tester is used to contact a negative electrode of a soft package lithium battery, the other end of the insulation resistance tester is contacted with an aluminum layer of an aluminum-plastic film, then the insulation resistance tester outputs 2000V high voltage breakdown, if a crack exists in a PP layer of the aluminum-plastic film, an electrolyte permeates into the aluminum layer, a closed loop is formed at this time, the crack position of the PP layer is melted and burnt due to high temperature, and a breakdown black spot is left, at this time, it can be determined that the insulation test of the soft package lithium battery is unqualified, and although the insulation testing method can detect the soft package lithium battery, the method still has defects:

firstly, the insulation resistance tester outputs 2000V high-voltage, so that if a tester touches the high-voltage carelessly, the life safety of the tester is greatly damaged, and the safety and reliability are not high;

secondly, if the PP layer of the aluminum-plastic film has cracks, that is, the aluminum-plastic film has defects, at the crack position of the PP layer, since the electrolyte penetrates into the cracks of the PP layer to contact with the aluminum layer to form a closed loop, under the action of high voltage, the PP layer will melt and burn at the crack position to leave black spots, but due to too high voltage, the temperature at the crack position will be very high when correspondingly conducting, and the area of the black spots is usually not only a small spot but a large spot, which easily causes that a tester cannot accurately position the position of the PP layer to which the crack appears;

thirdly, if a plurality of cracks exist in the PP layer at the same time, one of the cracks causes the aluminum-plastic film fatal defect, but the other two cracks are closer to the high-voltage contact position, so that the two cracks close to the high-voltage contact position are melted and burned, while the fatal crack is farther from the high-voltage contact position and is not melted and burned, so that the judgment of a tester is misjudged, and the crack which is melted and burned is mistakenly considered to be the cause of the aluminum-plastic film fatal defect.

Therefore, in order to solve the above problems, the present application discloses an aluminum-plastic film insulation test structure and an aluminum-plastic film insulation test method that have high safety and reliability, can accurately locate a defect point, and have a low error rate.

Referring to fig. 1 and fig. 3 together, an aluminum-plastic film insulation test structure 10 includes an aluminum-sealing adhesive paper 100, an aluminum-plastic film 200, and a dc power supply device 300.

Thus, it should be noted that the aluminum sealing adhesive paper 100 plays a role of sealing; the aluminum-plastic film 200 is a target object of an insulation test; the dc power supply device 300 performs an insulation test on the aluminum-plastic film 200.

Referring to fig. 3, the aluminum plastic film 200 is provided with an edge sealing and a cutting edge, and the cutting edge is covered by the aluminum sealing adhesive paper 100.

Thus, it should be noted that the edge seals are structures left by the aluminum-plastic film 200 after the heat sealing process is performed, and the number of the edge seals of the aluminum-plastic film 200 is four, namely two side edge seals, one top seal and one bottom edge seal; the side of dissecting is the structure that leaves after dissecting the process to plastic-aluminum membrane 200, because the plastic-aluminum membrane insulation test structure 10 of this application need take out the electric core that sets up at plastic-aluminum membrane 200, consequently, need dissect the operation to the plastic-aluminum membrane of soft packet of lithium cell earlier, separate the electric core and the plastic-aluminum membrane 200 of built-in inside, after the operation is dissected in the completion, dissect the limit for the cladding in utilizing a correspondence of aluminium sealing adhesive paper, cause the erroneous judgement when preventing follow-up carrying out insulation test to plastic-aluminum membrane 200.

It should be further noted that, referring to fig. 6, the manufacturing method of the aluminum-plastic film 200 may be performed by the following steps:

firstly, obtain a soft packet of lithium cell that awaits measuring, utilize the cutter instrument to dissect the soft packet of lithium cell that awaits measuring according to predetermineeing the route, take out the electric core of the soft packet of lithium cell of setting up at the awaiting measuring, obtain plastic-aluminum membrane 200, plastic-aluminum membrane 200 this moment has the banding and dissects the side. The preset sectioning path is a manually set sectioning path, for example, the aluminum plastic film of the soft package lithium battery to be tested can be sectioned by referring to the T-shaped sectioning path shown in fig. 1, and of course, a tester can select a proper sectioning path to section the aluminum plastic film of the soft package lithium battery to be tested according to actual conditions, so as to meet the requirement that the final aluminum plastic film and the battery cell embedded in the aluminum plastic film can be separated from each other.

After the aluminum plastic film 200 with the sealed edge and the sectioning edge is obtained, the sectioning edge is covered by the aluminum sealing adhesive tape, namely the aluminum sealing adhesive tape 100 is adhered to the sectioning edge, and the sectioning edge is completely covered by the aluminum sealing adhesive tape 100. It should be noted that, because there is an aluminum layer in the aluminum-plastic film 200, after the aluminum layer is cut, the aluminum layer on the cut edge is exposed, but the aluminum layer exposed on the cut edge is not a defect position, but is exposed only because of cutting, so that in order to prevent the aluminum layer exposed on the cut edge from affecting the subsequent insulation test, the cut edge needs to be covered by the aluminum-sealing adhesive tape 100, that is, the aluminum layer exposed on the cut edge is covered by the aluminum-sealing adhesive tape, which lays a foundation for the subsequent insulation test.

Referring to fig. 1, the dc power supply device 300 includes a dc power supply module 310, a copper sheet 320, a solution tray 330, a probe piece 340 and a negative clamp 350, the dc power supply module 310 is provided with a positive output piece 311 and a negative output piece 312, the copper sheet 320 is disposed in the solution tray 330, the solution tray 330 is used for containing a solution containing copper ions, the probe piece 340 is connected to the positive output piece 311, the probe piece 340 is used for piercing an edge seal of the aluminum plastic film 200, the negative clamp 350 is connected to the negative output piece 312, and the negative clamp 350 is used for clamping the copper sheet 320.

Thus, it should be noted that the dc power module 310 functions as a voltage output for outputting a voltage of 9V; the copper sheet 320 and the solution containing copper ions contained in the solution disk 330 are both materials which generate oxidation reduction with the aluminum plastic film; the probe piece 340 and the negative electrode clip 350 both function as an electrical connection.

Referring to fig. 6, after the above-mentioned operation is completed, the insulation test process for the aluminum-plastic film 200 may be formally performed:

the probe 340 is utilized to pierce the edge sealing of the aluminum-plastic film 200, the negative electrode clamp 350 is used to clamp the copper sheet 320, the aluminum-plastic film 200 and the copper sheet 320 are placed in the solution tray 330 containing the solution containing copper ions, and then the direct current power supply module 310 is started to output 9V voltage according to the preset duration. It should be noted that, because the solution disk 330 contains the solution containing copper ions, if there is a crack in the PP layer of the aluminum-plastic film 200, the solution containing copper ions will penetrate into the crack and contact with the aluminum layer to form a closed loop, the solution disk 330 will undergo an oxidation-reduction reaction, under the action of the 9V voltage, the copper sheet 320 will become copper ions because of losing electrons, the copper sheet 320 will gradually become smaller, and the copper ions of the solution containing copper ions will be precipitated on the aluminum layer because of getting electrons, i.e. at the crack position of the PP layer, and finally, the aluminum-plastic film 200 will have copper at the crack position of the PP layer; if there is no crack in the PP layer of the aluminum plastic film 200, the solution tray 330 will not undergo redox reaction, and no copper will be precipitated.

It should be further noted that the preset duration may be 2 hours, and a specific value of the preset duration may be flexibly set according to actual needs; the solution containing copper ions may be a copper sulfate solution.

It should be further noted that, after the aluminum-plastic film 200 has a crack and undergoes an oxidation-reduction reaction in the solution tray 330 for 2 hours, the tester takes the aluminum-plastic film 200 out of the solution tray 330, cleans the aluminum-plastic film 200 with clear water to obtain an aluminum-plastic film to be tested, places the cleaned aluminum-plastic film to be tested under a two-dimensional microscope, performs an amplification observation on the aluminum-plastic film to be tested with the two-dimensional microscope, and positions the defect position of the aluminum-plastic film to be tested according to the copper precipitation position, so that the tester can accurately position the defect position of the aluminum-plastic film to be tested according to the copper precipitation position.

Compared with the insulation test method in the prior art, the insulation test method has the following advantages:

firstly, the direct-current power supply module outputs 9V low voltage, so that the personal safety of testers is not endangered, and the safety and reliability are greatly improved;

secondly, because the position of copper precipitation is utilized to position the defect position of the aluminum-plastic film, only the position with cracks has copper precipitation, so that a tester can accurately position the defect position of the aluminum-plastic film;

thirdly, even if the defect positions exist in multiple positions, a tester can accurately analyze the fatal defect positions according to the area size of copper precipitation, namely the larger the area of cracks is, the larger the precipitation amount of copper is, and the fatal defect positions of the aluminum-plastic film are found through the phenomenon, so that the error rate is greatly reduced.

It should be further noted that, in order to ensure that the probe 340 can successfully pierce the edge seal of the aluminum-plastic film 200, after the probe 340 pierces the edge seal of the aluminum-plastic film 200, the negative clamp 350 is used to contact the aluminum layer of the cut edge, then the dc power supply module 310 outputs a voltage to see whether a closed loop circuit can be formed, if the closed loop circuit is turned on, it is determined that the probe 340 successfully pierces the edge seal of the aluminum-plastic film 200, and then the cut edge is covered by the aluminum sealing adhesive tape 100.

It should be noted that, since the probe 340 penetrates the edge seal of the aluminum-plastic film 200, an aluminum layer of the aluminum-plastic film 200 at the penetrated portion is exposed, and the exposed aluminum layer may contact with a solution containing copper ions to generate an oxidation-reduction reaction, in order to prevent this, the edge seal penetrated by the probe 340 may be folded upwards, so that the folded edge seal is not in contact with the solution containing copper ions.

Further, referring to fig. 4, in one embodiment, the probe 340 includes a positive connection line 341 and a probe 342, one end of the positive connection line 341 is connected to the positive output element 311, the other end of the positive connection line 341 is connected to the probe 342, and the probe 342 is configured to pierce the sealed edge of the aluminum plastic film 200.

As such, it should be noted that the positive connection line 341 plays a role of electrical connection; the probe 342 serves as an edge seal that pierces the aluminum plastic film 200. Specifically, the probe 342 is provided with a spike 342a at a position close to the aluminum plastic film 200, and the spike 342a is used for puncturing the sealing edge of the aluminum plastic film 200. Thus, the sharp part 342a can make it easier for the tester to pierce the edge seal of the aluminum-plastic film 200.

Further, referring to fig. 5, in an embodiment, the negative clip 350 includes a negative connection line 351 and a negative clip 352, one end of the negative connection line 351 is connected to the negative output member 312, the other end of the negative connection line 351 is connected to the negative clip 352, a plurality of negative pressing teeth 352a are disposed on the negative clip 352, and each negative pressing tooth 352a is used for holding the copper sheet 320.

As described above, the negative electrode connection line 351 functions as an electrical connection; the negative clamping piece 352 plays a role in clamping the copper sheet 320, and the negative clamping piece 352 is provided with a plurality of negative pressing teeth 352a, and the arrangement of the negative pressing teeth 352a can increase the clamping force.

Further, referring to fig. 5 again, in one embodiment, two negative anti-slip protrusions 352b are disposed on the negative clamping member 352, and the two negative anti-slip protrusions 352b are axially symmetrically distributed around the central axis of the negative clamping member 352.

Therefore, it should be noted that the two negative electrode anti-slip protrusions 352b can play an anti-slip role, so that the negative electrode clamping piece 352 can be operated by a tester more easily.

Further, referring to fig. 2 again, in an embodiment, the dc power device 300 further includes two cushion strips 360, the two cushion strips 360 are disposed on the dc power module 310, and the two cushion strips 360 are axially symmetrically distributed around the central axis of the dc power module 310.

Thus, it should be noted that the two cushion strips 360 can play a role of cushioning. Specifically, a plurality of anti-slip stripes 361 are disposed on each of the two cushion strips 360. Thus, the anti-slip stripes 361 can enhance the friction between the bumper strip 360 and the ground.

Further, referring to fig. 2 again, in one embodiment, the dc power supply device 300 further includes a handle 370, and the handle 370 is disposed on the dc power module 310.

Thus, it should be noted that the handle 370 is configured to enable a tester to move the dc power module 310 more conveniently.

Further, referring to fig. 1 again, in one embodiment, the dc power module 310 is provided with a plurality of weight-reducing slots 313.

In this way, the opening of the weight reduction grooves 313 can reduce the overall weight of the dc power supply module 310.

The above embodiments only express a few embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An aluminum-plastic film insulation test structure is characterized by comprising:

sealing aluminum adhesive paper;

2. The aluminum-plastic film insulation test structure of claim 1, wherein the probe member comprises a positive connection wire and a probe, one end of the positive connection wire is connected with the positive output member, the other end of the positive connection wire is connected with the probe, and the probe is used for piercing the sealed edge of the aluminum-plastic film.

3. The aluminum-plastic film insulation test structure of claim 2, wherein the probe is provided with a sharp part at a position close to the aluminum-plastic film, and the sharp part is used for piercing the sealing edge of the aluminum-plastic film.

4. The aluminum-plastic film insulation test structure of claim 1, wherein the negative electrode clamp comprises a negative electrode connecting wire and a negative electrode clamping piece, one end of the negative electrode connecting wire is connected with the negative electrode output member, the other end of the negative electrode connecting wire is connected with the negative electrode clamping piece, a plurality of negative electrode pressing teeth are arranged on the negative electrode clamping piece, and each negative electrode pressing tooth is used for clamping the copper sheet.

5. The aluminum-plastic film insulation test structure of claim 4, wherein two negative electrode anti-slip bumps are arranged on the negative electrode clamping piece, and the two negative electrode anti-slip bumps are axially symmetrically distributed around the central axis of the negative electrode clamping piece.

6. The aluminum-plastic film insulation test structure of claim 1, wherein the dc power supply device further comprises two cushion strips, both of the cushion strips are disposed on the dc power supply module, and the two cushion strips are axially symmetrically distributed with a central axis of the dc power supply module.

7. The aluminum-plastic film insulation test structure as recited in claim 6, wherein a plurality of anti-slip lines are disposed on each of the two cushion strips.

8. The aluminum-plastic film insulation test structure of claim 1, wherein the dc power supply device further comprises a handle, and the handle is disposed on the dc power supply module.

9. The aluminum-plastic film insulation test structure as recited in claim 1, wherein the dc power module has a plurality of weight reduction slots.

10. An aluminum-plastic film insulation test method is characterized by comprising the following steps:

step S04, outputting 9V voltage by the direct current power supply module according to preset duration to obtain the aluminum-plastic film to be detected;