CN210487526U - Battery pole piece cohesiveness testing device - Google Patents
Battery pole piece cohesiveness testing device Download PDFInfo
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- CN210487526U CN210487526U CN201921085368.7U CN201921085368U CN210487526U CN 210487526 U CN210487526 U CN 210487526U CN 201921085368 U CN201921085368 U CN 201921085368U CN 210487526 U CN210487526 U CN 210487526U
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Abstract
The utility model discloses a battery pole piece cohesiveness testing device, which comprises an electronic balance, an adhesive tape and an operating platform; the operating platform comprises a horizontal platform surface, a battery pole piece to be tested is fixedly attached to the horizontal platform surface, and the surface of the battery pole piece, which is not coated with active substances, is attached to the horizontal platform surface; one side of the adhesive tape with viscosity is flatly stuck on the battery pole piece; a tester pulls the adhesive tape to separate from the battery pole piece by applying a pulling force on the adhesive tape; the electronic balance is used for weighing the weight of the battery pole piece before the battery pole piece is attached to the horizontal table top and the weight of the battery pole piece after the adhesive tape is completely separated; the utility model discloses a weighing the weight difference before the test of battery pole piece and after the test, judging battery pole cohesiveness, solving and adopting the pulling force method only to draw away the good battery pole piece surface part active material of cohesiveness, the adhesion that leads to the test to obtain is little, causes the tester to judge the poor problem of battery pole piece cohesiveness by mistake.
Description
All as the field of technology
The utility model relates to a battery pole piece capability test technical field, concretely relates to battery pole piece cohesiveness testing arrangement.
All the above-mentioned background techniques
In the field of lithium titanate batteries, the coated positive and negative electrode plates are dried, and active substances are fixed on a current collector by an adhesive. The adhesion between the active material and the current collector greatly affects the electrical performance and safety performance of the lithium battery; if the bonding strength of the active substance and the current collector is not enough, the active substance can be separated from the current collector in the charging and discharging process, so that the abnormity of low capacity, large internal resistance, low cycle life and the like of the battery cell is caused slightly, and the internal short circuit of the battery cell is caused seriously, and the battery cell self generates heat and even explodes.
Currently, the industry mainly tests the adhesion between the active material and the current collector by testing the adhesion between the active material and the current collector, and the method for testing the adhesion between the active material and the current collector mainly comprises a tension method.
The invention patent with publication number CN101241065B discloses a method for testing the adhesion force of an active substance and a current collector of a battery pole piece, which comprises the following steps of adhering one surface of the pole piece, which is provided with the active substance, on a tensile piece by using quick-drying glue, adhering the other surface of the pole piece on a fixing piece by using the quick-drying glue, after the quick-drying glue is cured, drawing the tensile piece by using a tensile angle theta, and recording the tensile force F when the tensile piece is separated. However, since the active material coated on the lithium titanate battery electrode plate is of a layered structure, when the lithium titanate battery is tested by the above test method, only a thin layer of the surface of the active material may be taken away when the tensile member is separated, and not all the active material on the electrode plate, so the value of the tensile force F may not be large, which may cause a tester to mistakenly consider that the adhesion effect of the active material and the current collector is not good, but actually, most of the active material is not pulled away, so the adhesion effect of the active material and the current collector at this time should be good, not good.
All kinds of practical novel contents
The utility model discloses a first purpose aims at providing a battery pole piece cohesiveness testing arrangement, solves and adopts the pulling force method only to draw away the battery pole piece surface part active material that the cohesiveness is good, and the adhesion that leads to the test to obtain is little, causes the tester to judge the poor problem of active material and mass flow body cohesiveness by mistake.
In order to realize the utility model discloses a first purpose, the utility model discloses following technical scheme has been taken:
a battery pole piece cohesiveness testing device comprises an electronic balance, an adhesive tape and an operating platform; the operating platform comprises a horizontal platform surface, a battery pole piece to be tested is fixedly attached to the horizontal platform surface, one surface of the battery pole piece, coated with active substances, is back to the horizontal platform surface, and the other surface of the battery pole piece is attached to the horizontal platform surface; only one side of the adhesive tape has adhesiveness; one side of the adhesive tape with viscosity is flatly stuck on the battery pole piece, the end is a fixed section, and the other end is a free section; a tester applies a pull force which forms an acute angle with the fixed section of the adhesive tape on the free section of the adhesive tape to pull the adhesive tape to separate from the battery pole piece;
the electronic balance is used for weighing the weight of the battery pole piece before the battery pole piece is attached to the horizontal table top and the weight of the battery pole piece after the adhesive tape is completely separated; the smaller the difference between the weight of the battery pole piece before the battery pole piece is attached to the horizontal table top and the weight of the battery pole piece after the adhesive tape is completely separated, the better the adhesive property between the active substance of the battery pole piece and the current collector is.
The utility model discloses a get the weight difference value that battery pole piece subsides established before the level mesa and battery pole piece after the sticky tape breaks away from completely, judge the cohesiveness of battery pole piece active material and mass flow body, little according to the weight difference value, the active material of battery pole piece is better with the cohesiveness of mass flow body, the weight difference value is big more, the active material of battery pole piece is poor more with the cohesiveness of mass flow body, the solution adopts the pulling force method only to draw away the battery pole piece surface part active material that the cohesiveness is good, the adhesion that leads to the test to obtain is little, cause the tester to judge the problem that the active material is poor with the mass flow body cohe.
Further, the battery pole piece cohesiveness testing device also comprises a stripping clamp; the free section of tape is clamped by the stripping fixture.
The utility model discloses a strip anchor clamps and carry the sticky tape free section, the fixation clamp sticky tape of being convenient for, and make the sticky tape atress more even.
Further, the battery pole piece cohesiveness testing device also comprises a digital display push-pull dynamometer; and the digital display push-pull dynamometer is fixedly installed with the peeling clamp, and the peeling clamp is pulled to apply tension on the free section of the adhesive tape.
The utility model discloses a pulling force is applyed to digital display push-and-pull dynamometer, not only is convenient for apply more stable pulling force at the sticky tape free section, makes the sticky tape atress more even, and in addition, when having increased the cohesiveness of testing different battery pole pieces, the uniformity of the pulling force numerical value size that the sticky tape receives has increased the uniformity of operation in the batch test promptly, reduces the test result error of different battery pole pieces.
Further, battery pole piece cohesiveness testing arrangement still includes and is trapezoidal slider along longitudinal section, the cross-section is trapezoidal slider places the back of sticky tape canned paragraph, with the intersect parallel and level of sticky tape canned paragraph and sticky tape free section, need the pulling as testing personnel the sticky tape breaks away from during the battery pole piece, the back of sticky tape free section with the cross-section is the laminating of the oblique side of trapezoidal slider, along with the sticky tape canned paragraph breaks away from battery pole piece, the cross-section is trapezoidal slider along the axial synchronous motion of sticky tape canned paragraph, all the time with the intersect parallel and level of sticky tape canned paragraph and sticky tape free section.
The utility model discloses a sticky tape and the laminating of the oblique side of slider have guaranteed that the part of sticky tape slider laminating remains unanimous throughout with the angle of horizontal mesa at the in-process that removes, and when having increased the cohesiveness of testing different battery pole pieces, the uniformity of the pulling force angle that the sticky tape receives has increased the uniformity of operating in the batch test promptly, reduces the test result error of different battery pole pieces.
As a specific implementation mode, the included angle between the oblique side face of the sliding block attached to the adhesive tape and the lower bottom face of the sliding block is 30-60 degrees.
Further, battery pole piece cohesiveness testing arrangement still includes the slider for parallelogram along longitudinal section, the slider that the cross-section is parallelogram is placed the back of sticky tape canned paragraph, with the intersection line parallel and level of sticky tape canned paragraph and sticky tape free segment, need the pulling when the tester the sticky tape breaks away from when the battery pole piece, the back of sticky tape free segment with the cross-section is the laminating of the oblique side of parallelogram's slider, along with the sticky tape canned paragraph breaks away from battery pole piece, the slider that the cross-section is parallelogram along the axial synchronous motion of sticky tape canned paragraph, all the time with the intersection line parallel and level of sticky tape canned paragraph and sticky tape free segment.
The utility model discloses a sticky tape and the laminating of the oblique side of slider have guaranteed that the part of sticky tape slider laminating remains unanimous throughout with the angle of horizontal mesa at the in-process that removes, and when having increased the cohesiveness of testing different battery pole pieces, the uniformity of the pulling force angle that the sticky tape receives has increased the uniformity of operating in the batch test promptly, reduces the test result error of different battery pole pieces.
As a specific implementation mode, the included angle between the oblique side face of the sliding block attached to the adhesive tape and the lower bottom face of the sliding block is 30-60 degrees.
As a specific implementation mode, two ends of the battery pole piece are fixedly arranged on the horizontal table top through screws.
The utility model fixes the two ends of the battery pole piece on the horizontal table-board through the screws, and fixes and pastes the battery pole piece on the horizontal table-board; after the test is finished, the screw is taken out, so that the battery pole piece can be taken down from the horizontal table board, and the battery pole piece can be conveniently mounted and dismounted.
In a specific embodiment, two ends of the battery pole piece are fixed on the horizontal table top under the pressure of the pressing tool.
The utility model fixes the two ends of the battery pole piece on the horizontal table top through the pressing tool, and fixes and pastes the battery pole piece on the horizontal table top; after the test is finished, the clamps at the two ends of the pole piece are released, so that the battery pole piece can be taken down from the horizontal table board, and the battery pole piece is convenient to mount and dismount.
In a specific embodiment, the side of the battery pole piece, which is not coated with the active substance, is attached to the horizontal table top through quick-drying glue.
The utility model discloses a quick-drying glue pastes the one side of battery sheet uncoated active material on the horizontal table face, establishes battery sheet fixed subsides on the horizontal table face.
Description of the drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. The drawings in the following description are only examples of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts.
Fig. 1 is a perspective view of a device for testing adhesion of a battery pole piece according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for testing the adhesion of a battery pole piece according to an embodiment of the present invention;
fig. 3 is a perspective view of a device for testing the adhesion of a battery pole piece provided in the third embodiment of the present invention;
description of the drawings: 1-battery pole piece, 2-adhesive tape, 21-adhesive tape fixing section, 22-adhesive tape free section, 31-sliding block with trapezoidal section along longitudinal direction, 32-sliding block with parallelogram section along longitudinal direction, 4-peeling clamp, 5-digital display push-pull force meter, 6-operation table, 61-horizontal table top.
(specific embodiments) in all cases
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
As shown in fig. 1, a device for testing the adhesion of a battery pole piece, which is used for testing the adhesion of an active material and a current collector of the battery pole piece, comprises an electronic balance (not shown), an adhesive tape 2, a slide block 31 with a trapezoidal longitudinal section, a peeling clamp 4, a digital display push-pull dynamometer 5 and an operation platform 6; the operation table 6 comprises a horizontal table surface 61; the battery pole piece 1 to be tested is fixedly attached to the horizontal table top, one surface, coated with the active substances, of the battery pole piece 1 faces back to the horizontal table top 61, and the other surface, not coated with the active substances, of the battery pole piece 1 is attached to the horizontal table top 61; only one side of the adhesive tape 2 has viscosity, the viscous side is a front side, and the other side is a back side; one side (namely the adhesive tape fixing section 21) of one end of the adhesive tape 2 is provided with an adhesive surface and is smoothly adhered to the battery pole piece 1, the other end of the adhesive tape 2 is an adhesive tape free section 22, and the adhesive tape free section 22 is clamped by the stripping clamp 3; the digital display push-pull dynamometer 5 is fixedly installed with the peeling clamp 3, and the digital display push-pull dynamometer 5 applies pulling force on the free section 22 of the adhesive tape by pulling the peeling clamp 3; the sliding block 31 is arranged on the back surface of the adhesive tape fixing section 21 and is flush with the intersection line of the adhesive tape fixing section 21 and the adhesive tape free section 22; when a tester needs to separate the adhesive tape 2 from the battery pole piece 1, the back surface of the adhesive tape free section 22 is attached to the oblique side surface of the sliding block 31, the digital display push-pull dynamometer 5 applies a pulling force to the adhesive tape free section 22, pulls the adhesive tape fixing section 21 to separate from the battery pole piece 1, and the sliding block 31 is separated from the pole piece 1 along with the adhesive tape fixing section 21, synchronously moves along the axial direction of the adhesive tape fixing section 22 and is always flush with the intersection line of the adhesive tape fixing section 21 and the adhesive tape free section 22; the electronic balance weighs the weight G1 (namely the weight before the test) of the battery pole piece 1 before being attached to the horizontal table surface 61 and the weight G2 (namely the weight after the test) of the battery pole piece 1 after the adhesive tape 2 is completely separated from the battery pole piece 1.
In the embodiment, two ends of the battery pole piece 1 are nailed by screws, the two ends of the battery pole piece 1 are fixed on the horizontal table-board, and then the battery pole piece 1 is fixed on the horizontal table-board; after the test is finished, the battery pole piece 1 can be taken down from the horizontal table surface 61 by taking out the screw, so that the battery pole piece 1 can be conveniently mounted and dismounted.
In other embodiments, the two ends of the battery pole piece 1 are pressed by the pressing tool, the two ends of the battery pole piece 1 are fixed on the horizontal table-board, and the battery pole piece 1 is further fixed on the horizontal table-board; after the test is finished, the pressing tools at the two ends of the battery pole piece 1 are released, so that the battery pole piece 1 can be taken down from the horizontal table board, and the battery pole piece 1 is convenient to mount and dismount.
In this embodiment, the working principle of the adhesion testing device for the battery pole piece 1 for testing the adhesion between the active material and the current collector of the battery pole piece 1 is as follows: when the active material of the battery pole piece 1 has good cohesiveness with the current collector and the adhesive tape 2 is separated from the battery pole piece 1, the active material, namely the weight G, is difficult to take away from the battery pole piece 11With weight G2The difference between them is small; when the adhesion between the active material of the battery pole piece 1 and the current collector is poor, and the adhesive tape 2 is separated from the battery pole piece 1, the active material is easier to take away from the battery pole piece 1, namely the weight G1With weight G2The difference between them is large.
In this embodiment, when the sticky surface of the tape fixing section 21 is required to be smoothly adhered to the battery pole piece 1, a tester applies a fixed value of pulling force to the tape free section 21 through the digital display push-pull dynamometer 5, so as to increase the consistency of the adhesive strength between the tape 2 and different battery pole pieces 1, that is, the consistency of operation in batch testing is increased, and the test result errors of different battery pole pieces 1 are reduced.
In this embodiment, the surface of the slider 31 is smooth, the section along the longitudinal direction is in a right trapezoid shape, the angle between the inclined side surface and the lower bottom surface of the slider 31 with the trapezoid shape along the longitudinal section is 45 degrees, the angle between the part of the adhesive tape 2 attached to the slider 31 with the trapezoid shape along the longitudinal section and the angle between the part and the horizontal table surface 61 in the moving process are always kept at 45 degrees, when the adhesion of different battery pole pieces 1 is tested, the consistency of the pull angle borne by the adhesive tape 2 is increased, namely, the consistency of operation in batch test is increased, and the test result errors of different battery pole pieces 1 are reduced.
In the present embodiment, the slide block 31 is made of 304 steel, and weighs about 1.5 kg; the length of the free tape section 22 along the axial direction is greater than the length of the inclined side surface of the slider 31, so that a part of the free tape section 22 is attached to the slider 31, and the part close to the port extends out of the inclined side surface of the slider 31.
In the embodiment, the adhesive tape free section 22 is clamped by the stripping clamp 4, so that the adhesive tape 2 is conveniently clamped and the stress of the adhesive tape 2 is more uniform; the digital display push-pull dynamometer 5 is used for exerting pulling force, so that more stable pulling force can be conveniently exerted on the free section 22 of the adhesive tape, the stress of the adhesive tape 2 is more uniform, the consistency of the values of the pulling force exerted on the adhesive tape 2 by different battery pole pieces 1 in the test process is increased, namely, the consistency of operation in batch test is increased, and the test result errors of different battery pole pieces 1 are reduced.
In this embodiment, when testing the cohesiveness of different battery pole pieces, the strength and direction of the force pulling the adhesive tape are kept consistent, so that the operation consistency in batch testing is increased, and the test result errors of different battery pole pieces are reduced.
As shown in fig. 2, a method for testing the adhesion between an active material and a current collector of a battery pole piece includes the following steps:
s100, intercepting a battery pole piece 1 to be tested with a certain length and width, weighing the weight of the battery pole piece 1, and obtaining the weight G of the battery pole piece 1 before testing1；
S200, fixedly attaching the battery pole piece 1 to the horizontal table surface 61, so that one surface, coated with active substances, of the battery pole piece 1 is far away from the horizontal table surface 61, and the other surface of the battery pole piece 1 is attached to the horizontal table surface 61;
s300, cutting out an adhesive tape 2 with a certain length and width, and adhering one end of the adhesive tape 2 to one surface of the battery pole piece 1 coated with the active substance, wherein one end of the adhesive tape 2 adhered to the battery pole piece 1 is an adhesive tape fixing section 21;
s400, applying a pulling force to the other end of the adhesive tape 2 to enable the sticky side of the adhesive tape 2 to be flatly attached to the battery pole piece 1, and reserving a certain length at the other end of the adhesive tape 2;
s500, applying a pulling force forming an acute angle with the adhesive tape fixing section 21 to the other end of the adhesive tape 2, and pulling the adhesive tape 2 until the adhesive tape 2 is completely separated from the battery pole piece 1, wherein the other end of the adhesive tape 2 is an adhesive tape free section 22;
s600, weighing the weight of the battery pole piece 1 to obtain the weight G of the battery pole piece 1 after testing2；
S700, calculating a weight difference value delta G between the battery pole piece 1 before and after the test, and judging the cohesiveness of the battery pole piece 1 according to the weight difference value delta G, wherein delta G is G2-G1。
In the present embodiment, the length L of the battery pole piece 1 to be tested in step S1001Is 60cm, width W1Is 9 cm.
In this embodiment, in step S200, two ends of the battery pole piece 1 are screwed by screws, and the two ends of the battery pole piece 1 are fixed on the horizontal table, so that the battery pole piece 1 is fixed on the horizontal table; after the test is finished, the battery pole piece 1 can be taken down from the horizontal table surface 61 by taking out the screw, so that the battery pole piece 1 can be conveniently mounted and dismounted.
In other embodiments, step S200 presses the two ends of the battery pole piece 1 by a pressing tool, so as to fix the two ends of the battery pole piece 1 on the horizontal table surface, and further fix the battery pole piece 1 on the horizontal table surface; after the test is finished, the pressing tools at the two ends of the battery pole piece 1 are released, so that the battery pole piece 1 can be taken down from the horizontal table board, and the battery pole piece 1 is convenient to mount and dismount.
In the present embodiment, in step S300, a transparent adhesive tape with a width of 4.5cm is used as the adhesive tape 2, one surface of the adhesive tape 2 is sticky, and the other surface of the adhesive tape 2 is not sticky, and the sticky surface of the adhesive tape 2 is referred to as a front surface, and the non-sticky surface is referred to as a back surface; in step S300, the length of the tape 2 is L2Is 50cm in width W24.5cm, i.e., the width W of the adhesive tape 2 cut out in step S3002Is 4.5cm, and has a length L2Is 50 cm.
In other embodiments, electricityLength L of cell plate 11And width W1Other values are possible; length L of adhesive tape 22And width W2Other values are possible.
In the embodiment, the pulling force used when the adhesive tape 2 is smoothly attached to the battery pole piece 1 by pulling the adhesive tape free section 22 in the step S400 is F1，F1Has a value of 40N, F1The included angle between the direction of the fixing section and the adhesive tape 21 is more than 90 degrees, in the embodiment, the included angle between the direction of the fixing section and the adhesive tape 21 is 180 degrees, so that the adhesive surface of the adhesive tape fixing section 21 is flatly attached to the battery pole piece 1; the length of the free section of the adhesive tape (i.e. the adhesive tape 2 is reserved) is L3，L3The value of (2) is 20 cm.
In the present embodiment, the pulling force used in step S500 to completely separate the adhesive tape 2 from the battery pole piece 1 by pulling the adhesive tape free section 22 is F2Step S500 by pulling force F2Pulling the adhesive tape 2 to move at a constant speed.
In this embodiment, step S500 includes the following steps: s510, placing a sliding block 31 with a trapezoidal longitudinal section on the back surface of the adhesive tape fixing section 21, wherein the intersection line of the inclined side surface and the lower bottom surface of the sliding block 31 is flush with the intersection line of the adhesive tape free section 22 and the adhesive tape fixing section 21; s520, rotating the adhesive tape free section 22 to enable part of the back surface of the adhesive tape free section 22 to rotate to be attached to the inclined side surface of the sliding block 31; s530, pulling the free section 22 of the adhesive tape, and keeping the part, attached to the inclined side face of the sliding block 31, of the adhesive tape 2 attached to the sliding block 31 all the time in the process of pulling the free section 22 of the adhesive tape until the adhesive tape 2 is completely separated from the battery pole piece 1.
In the present embodiment, in step S400, the adhesive tape free section 22 is clamped by the peeling clamp 3, and the digital display push-pull dynamometer 4 pulls the peeling clamp 3 to apply a pulling force with a desired value to the adhesive tape free section 22; in step S500, the adhesive tape free section 22 is clamped by the peeling clamp 3, and the peeling clamp 3 is pulled by the digital display push-pull dynamometer 4 to apply a pulling force of a desired value to the adhesive tape free section 22.
In the present embodiment, the accuracy of the electronic balance is 0.0001 g; the results of the tests for the adhesion of the active material to the current collector of three battery plates 1 are shown in table 1:
| first test | Second test | Third test | |
| G1 | 4.7202g | 4.7782g | 4.8007g |
| G2 | 4.2841g | 4.3300g | 4.4172g |
| ΔG | 0.4361g | 0.4482g | 0.3835g |
Table 1 test results of adhesion of active material and current collector of three battery electrode sheets 1
As can be seen from table 1, the second battery plate had the greatest weight difference and the worst adhesion, and the third battery plate had the smallest weight difference and the best adhesion.
Example two
The difference between this embodiment and the first embodiment is: the battery pole piece 1 to be tested in step S100 is not coated with an active materialOne surface of the table top is adhered to the horizontal table top 61 through quick-drying glue; the length of the battery pole piece 1 is L1Is 30cm, width W14.5cm, the length of the fixed segment 21 of the adhesive tape 2 is L1Is 30cm, width W1At 4.5cm, the tape 2 completely covered the battery pole piece 1.
EXAMPLE III
As shown in fig. 3, the present embodiment is different from the first embodiment in that: the section of the sliding block along the longitudinal direction is not trapezoidal, and is parallelogram; the slider 32 with the parallelogram section is placed on the back of the adhesive tape fixing section 21 and is flush with the intersection line of the adhesive tape fixing section 21 and the adhesive tape free section 22, when a tester needs to pull the adhesive tape 2 to separate from the battery pole piece 1, the back of the adhesive tape free section 22 is attached to the oblique side face of the slider 32 with the parallelogram section, and along with the separation of the adhesive tape fixing section 21 from the battery pole piece 1, the slider 32 with the parallelogram section synchronously moves along the axial direction of the adhesive tape fixing section 21 and is always flush with the intersection line of the adhesive tape fixing section 21 and the adhesive tape free section 22.
Example four
The difference between this embodiment and the first embodiment or the second embodiment or the third embodiment is that: the inclined side surface of the sliding block and the lower bottom surface form an included angle of 30 degrees.
EXAMPLE five
The difference between this embodiment and the first embodiment or the second embodiment or the third embodiment or the fourth embodiment is that: the inclined side surface of the sliding block and the lower bottom surface form an included angle of 60 degrees.
EXAMPLE six
The difference between this embodiment and the second embodiment, the third embodiment, the fourth embodiment, or the fifth embodiment is that: the battery pole piece cohesiveness testing device does not comprise a sliding block; f2The included angle between the adhesive tape fixing section 21 and the adhesive tape fixing section is 30-60 degrees.
EXAMPLE seven
The difference between this embodiment and the first embodiment or the second embodiment or the third embodiment or the fourth embodiment or the fifth embodiment or the sixth embodiment is that: the battery pole piece cohesiveness testing method does not include the step S400.
It is only above the preferred embodiment of the utility model, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongings to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a battery pole piece cohesiveness testing arrangement which characterized in that: comprises an electronic balance, an adhesive tape and an operating platform; the operating platform comprises a horizontal platform surface, a battery pole piece to be tested is fixedly attached to the horizontal platform surface, one surface of the battery pole piece, coated with active substances, is back to the horizontal platform surface, and the other surface of the battery pole piece is attached to the horizontal platform surface; only one side of the adhesive tape has adhesiveness; one side of the adhesive tape with viscosity is flatly stuck on the battery pole piece, the end is a fixed section, and the other end is a free section; a tester applies a pull force which forms an acute angle with the fixed section of the adhesive tape on the free section of the adhesive tape to pull the adhesive tape to separate from the battery pole piece; the electronic balance is used for weighing the weight of the battery pole piece before the battery pole piece is attached to the horizontal table top and the weight of the battery pole piece after the adhesive tape is completely separated.
2. The test device of claim 1, wherein: the battery pole piece cohesiveness testing device also comprises a stripping clamp; the free section of tape is clamped by the stripping fixture.
3. The test device of claim 2, wherein: the battery pole piece cohesiveness testing device also comprises a digital display push-pull dynamometer; and the digital display push-pull dynamometer is fixedly installed with the peeling clamp, and the peeling clamp is pulled to apply tension on the free section of the adhesive tape.
4. A test device according to any one of claims 1-3, characterized in that: the battery pole piece cohesiveness testing device also comprises a sliding block with a trapezoidal section along the longitudinal direction, wherein the sliding block with the trapezoidal section is placed on the back surface of the adhesive tape fixing section and is flush with the intersection line of the adhesive tape fixing section and the adhesive tape free section; when the tester needs to pull the sticky tape breaks away from when the battery pole piece, the back of sticky tape free section with the oblique side laminating of the slider that the cross-section is trapezoidal, along with the sticky tape canned paragraph breaks away from battery pole piece, the cross-section is trapezoidal slider along the axial synchronization who the sticky tape canned paragraph removed, all the time with the intersecting line parallel and level of sticky tape canned paragraph and sticky tape free section.
5. The test device of claim 4, wherein: the included angle between the oblique side face of the sliding block, which is attached to the adhesive tape, and the lower bottom face of the sliding block is 30-60 degrees.
6. A test device according to any one of claims 1-3, characterized in that: battery pole piece cohesiveness testing arrangement still includes the slider that is parallelogram along longitudinal section, the slider that the cross-section is parallelogram is placed the back of sticky tape canned paragraph, with the intersecting line parallel and level of sticky tape canned paragraph and sticky tape free section, need the pulling when the tester the sticky tape breaks away from during the battery pole piece, the back of sticky tape free section with the cross-section is the laminating of the oblique side of parallelogram's slider, along with the sticky tape canned paragraph breaks away from battery pole piece, the cross-section is parallelogram's slider along the axial synchronous motion of sticky tape canned paragraph, all the time with the intersecting line parallel and level of sticky tape canned paragraph and sticky tape free section.
7. The test device of claim 6, wherein: the included angle between the oblique side face of the sliding block, which is attached to the adhesive tape, and the lower bottom face of the sliding block is 30-60 degrees.
8. A test device according to any one of claims 1-3, characterized in that: two ends of the battery pole piece are fixedly arranged on the horizontal table board through screws.
9. A test device according to any one of claims 1-3, characterized in that: and two ends of the battery pole piece are fixed on the horizontal table board under the pressure action of the pressing tool.
10. A test device according to any one of claims 1-3, characterized in that: and one surface of the battery pole piece, which is not coated with the active substance, is adhered to the horizontal table top through the quick-drying glue.
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| CN110243718A (en) * | 2019-07-11 | 2019-09-17 | 成都市银隆新能源产业技术研究有限公司 | A kind of battery pole piece caking property test method and test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243718A (en) * | 2019-07-11 | 2019-09-17 | 成都市银隆新能源产业技术研究有限公司 | A kind of battery pole piece caking property test method and test device |
| CN110243718B (en) * | 2019-07-11 | 2024-05-03 | 成都市银隆新能源产业技术研究有限公司 | Method and device for testing cohesiveness of battery pole piece |
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