Insulation Test Method and Insulation Test Equipment for PTC Heating Sheet

Abstract

The present application relates to an insulation testing method and an insulation testing device for a PTC heating sheet. The insulation testing method includes the following steps: tightly attaching a first conductive plate to a first insulation layer of the PTC heating sheet, and tightly attaching a second conductive plate to a second insulation layer of the PTC heating sheet; connecting the positive and negative electrodes of a charged detection device to a first pole column and the first conductive plate respectively, and detecting the current value of the charged detection device. When the current value displayed by the charged detection device is less than a preset current value, the insulation detection result of the PTC heating sheet is qualified; otherwise, it is unqualified; connecting the positive and negative electrodes of the charged detection device to a second pole column and the second conductive plate respectively, and detecting the current value of the charged detection device. When the current value displayed by the charged detection device is less than a preset current value, the insulation detection result of the PTC heating sheet is qualified; otherwise, it is unqualified. The insulation testing method and the insulation testing device provided by the present application solve the problem of low efficiency of the insulation detection method for the PTC heating sheet.

Description

Technical Field

[0001] The present application relates to the technical field of processing PTC heating sheets, and particularly to an insulation test method and an insulation test device for PTC heating sheets. Background Art

[0002] In the field of new energy vehicle technology, generally, PTC heating sheets are commonly used to heat the passenger compartment or the battery, so that the passengers in the vehicle are in a comfortable temperature environment, or the battery is in the optimal operating temperature range. Moreover, in order to increase the power of the PTC heating sheet, generally multiple PTC heating sheets are stacked to form a PTC heating core. Thus, it is necessary to ensure that adjacent PTC heating sheets have good electrical insulation performance to prevent adjacent PTC heating sheets from short-circuiting and causing a vehicle fire.

[0003] The existing electrical insulation detection method generally uses an electric pen to perform insulation tests on the insulating layers on both outer surfaces of the PTC heating sheet. Since the insulating layers on both sides of the PTC heating sheet have a large area, the efficiency of using an electric pen to detect the insulation of the PTC heating sheet is very low. Summary of the Invention

[0004] Based on this, it is necessary to provide an insulation test method and an insulation test device for PTC heating sheets to solve the problem of low efficiency of the existing insulation detection method for PTC heating sheets.

[0005] Define the two electrode posts of the PTC heating sheet for connecting external power supply devices as the first electrode post and the second electrode post respectively, define the insulating layer of the PTC heating sheet close to the first electrode post as the first insulating layer, and define the insulating layer of the PTC heating sheet close to the second electrode post as the second insulating layer. The insulation test method for PTC heating sheets provided by the present application includes the following steps:

[0006] Respectively arrange a first conductive plate and a second conductive plate on both sides of the PTC heating sheet, and make the first conductive plate closely fit the first insulating layer and make the second conductive plate closely fit the second insulating layer;

[0007] Connect the positive electrode and the negative electrode of the charged detection device to the first electrode post and the first conductive plate respectively, and detect the current value of the charged detection device. When the current value displayed by the charged detection device is less than the preset current value, the insulation detection result of the PTC heating sheet is qualified; when the current value displayed by the charged detection device is greater than or equal to the preset current value, the insulation detection result of the PTC heating sheet is unqualified;

[0008] Connect the positive and negative electrodes of the live detection device to the second pole column and the second conductive plate respectively, and detect the current value of the live detection device. When the current value displayed by the live detection device is less than the preset current value, the insulation detection result of the PTC heating sheet is qualified. When the current value displayed by the live detection device is greater than or equal to the preset current value, the insulation detection result of the PTC heating sheet is unqualified.

[0009] In one embodiment, the insulation testing method further includes the following steps:

[0010] Arrange a first flexible conductive pad between the first insulating layer and the first conductive plate, and make the first insulating layer and the first conductive plate squeeze the first flexible conductive pad in opposite directions, so that both sides of the first flexible conductive pad are closely attached to the first insulating layer and the first conductive plate respectively;

[0011] Arrange a second flexible conductive pad between the second insulating layer and the second conductive plate, and make the second insulating layer and the second conductive plate squeeze the second flexible conductive pad in opposite directions, so that both sides of the second flexible conductive pad are closely attached to the second insulating layer and the second conductive plate respectively.

[0012] In one embodiment, the material of the first flexible conductive pad is conductive plastic or conductive rubber; and / or, the material of the second flexible conductive pad is conductive plastic or conductive rubber.

[0013] In one embodiment, the detection voltage of the live detection device is the rated voltage.

[0014] This application also provides an insulation testing device for a PTC heating sheet. The insulation testing device uses the insulation testing method described in any of the above embodiments to test the insulation of the PTC heating sheet. The insulation testing device includes an integrated mounting plate, a bottom bracket, a first driving element, and a plurality of movable pressing plates. The bottom bracket and the first driving element are respectively installed at both ends of the integrated mounting plate. There are a plurality of movable pressing plates between the bottom bracket and the first driving element, and the plurality of movable pressing plates are arranged in sequence along the direction from the first driving element to the bottom bracket. Adjacent movable pressing plates are spaced apart to form a movable gap; a set of testing components is arranged in each movable gap, and the testing components include a first conductive plate and a second conductive plate. The PTC heating sheet is clamped between the first conductive plate and the second conductive plate; the first driving element can sequentially push the plurality of movable pressing plates towards the bottom bracket, so that adjacent movable pressing plates can apply a preset pressure to the testing components arranged in the movable gap.

[0015] In one embodiment, the insulation testing device further includes a first guiding shaft and a second guiding shaft fixedly connected to the integrated mounting plate respectively. The first guiding shaft sequentially passes through one end of a plurality of movable pressing plates and is movably engaged with the plurality of movable pressing plates along the length direction of the first guiding shaft. The second guiding shaft sequentially passes through the other end of the plurality of movable pressing plates and is movably engaged with the plurality of movable pressing plates along the length direction of the second guiding shaft.

[0016] In one embodiment, the insulation testing device further includes a plurality of first return springs and a plurality of second return springs. The first return springs are sleeved outside the first guiding shaft, and two ends of each first return spring are respectively connected to adjacent movable pressing plates. When the first driving element pushes adjacent movable pressing plates to approach each other, the first return springs have a tendency to push the adjacent movable pressing plates to move away from each other; the second return springs are sleeved outside the second guiding shaft, and two ends of each second return spring are respectively connected to adjacent movable pressing plates. When the first driving element pushes adjacent movable pressing plates to approach each other, the second return springs have a tendency to push the adjacent movable pressing plates to move away from each other.

[0017] In one embodiment, the insulation testing device further includes a pushing assembly and a second driving element. The second driving element is installed on the integrated mounting plate. The pushing assembly is arranged on the side of the movable pressing plate close to the integrated mounting plate, and one end of the pushing assembly abuts against the output end of the second driving element, and the other end extends into the movable gap and abuts against the PTC heating sheet, so that the second driving element can drive the pushing assembly to push the PTC heating sheet out of the movable gap.

[0018] In one embodiment, the pushing assembly includes a main connecting plate, branch connecting plates, a pushing plate and a movable shaft. One end of the main connecting plate is connected to the output end of the second driving element, and the other end abuts against a plurality of branch connecting plates. The plurality of branch connecting plates are distributed along the arrangement direction of the movable pressing plates and are arranged in one-to-one correspondence with the movable pressing plates; one end of the movable shaft is connected to the branch connecting plate, and the other end is inserted into the corresponding movable pressing plate and is movably engaged with the movable pressing plate along the pushing direction of the pushing assembly, so that the branch connecting plate can be movably connected to the corresponding movable pressing plate through the movable shaft; one end of the pushing plate is connected to the branch connecting plate, and the other end extends into the corresponding movable gap and abuts against the PTC heating sheet, so that the second driving element can drive the main connecting plate to synchronously push the plurality of branch connecting plates to drive the corresponding pushing plates to push the PTC heating sheet.

[0019] In one embodiment, the first driving element is a cylinder or a driving motor.

[0020] Compared with the prior art, the insulation test method and insulation test equipment for PTC heating sheets provided in this application are such that by arranging the first conductive plate to closely adhere to the first insulating layer, if the first insulating layer is damaged, the damaged part of the first insulating layer will directly contact the first conductive plate, enabling the first pole column and the first conductive plate to conduct through the damaged part of the first insulating layer. In this way, the positive and negative poles of the live detection device will conduct to form an electrical circuit, and at this time, the current value displayed by the live detection device will be significantly greater than the preset current value. If the first insulating layer is intact, the first pole column and the first conductive plate cannot pass through the first insulating layer to form a conductive circuit, and thus, the positive and negative poles of the live detection device will not conduct to form an electrical circuit.

[0021] Similarly, by arranging the second conductive plate to closely adhere to the second insulating layer, if the second insulating layer is damaged, the damaged part of the second insulating layer will directly contact the second conductive plate, enabling the second pole column and the second conductive plate to conduct through the damaged part of the second insulating layer. In this way, the positive and negative poles of the live detection device will conduct to form an electrical circuit, and at this time, the current value displayed by the live detection device will be significantly greater than the preset current value. If the second insulating layer is intact, the second pole column and the second conductive plate cannot pass through the second insulating layer to form a conductive circuit, and thus, the positive and negative poles of the live detection device will not conduct to form an electrical circuit.

[0022] As can be seen from the above, it is only necessary to detect once to know whether the first insulating layer or the second insulating layer is damaged. In this way, the insulation detection efficiency of the PTC heating sheet is greatly improved. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Schematic assembly structure diagram of the test component and the PTC heating sheet provided in an embodiment of the present application;

[0025] Figure 2 Schematic structure diagram of the insulation test equipment provided in an embodiment of the present application;

[0026] Figure 3 Side view of the insulation test equipment provided in an embodiment of the present application;

[0027] Figure 4 Schematic partial structure of the insulation test equipment provided in an embodiment of the present application Figure 1 ;

[0028] Figure 5 Schematic diagram of a partial structure of an insulation test device provided in an embodiment of the present application Figure 2 .

[0029] Reference numerals: 100, PTC heating sheet; 110, first pole; 120, second pole; 130, first insulating layer; 140, second insulating layer; 200, test assembly; 210, first conductive plate; 220, second conductive plate; 300, integrated mounting plate; 310, base; 320, handle; 400, first driving element; 500, movable pressing plate; 510, movable gap; 610, first guiding shaft; 611, first fixing seat; 612, second fixing seat; 613, first return spring; 620, second guiding shaft; 621, third fixing seat; 622, fourth fixing seat; 623, second return spring; 700, second driving element; 800, pushing assembly; 810, main connecting plate; 820, branch connecting plate; 830, pushing plate; 840, movable shaft. Detailed implementation manners

[0030] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In this application, unless otherwise clearly defined and limited, the terms "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0034] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0036] In the field of new energy vehicle technology, generally, PTC heating sheets are generally used to heat the passenger compartment or the battery, so that the passengers in the vehicle are in a comfortable temperature environment, or to make the battery in the optimal working temperature range. And, in order to increase the power of the PTC heating sheet, multiple PTC heating sheets are generally stacked to form a PTC heating core. In this way, it is necessary to ensure that adjacent PTC heating sheets have good electrical insulation performance to prevent adjacent PTC heating sheets from short-circuiting and causing the vehicle to catch fire.

[0037] Existing electrical insulation detection methods generally use a test pen to perform insulation tests on the insulation layers on the outer surfaces of both sides of the PTC heating sheet. Since the insulation layers on both sides of the PTC heating sheet are relatively large in area, the efficiency of using a test pen to detect the insulation of the PTC heating sheet is very low.

[0038] Please refer to Figures 1 - 5 , to solve the problem of the low efficiency of the existing insulation detection method for the PTC heating sheet 100, the present application provides an insulation test method for the PTC heating sheet 100. Define the two electrode posts of the PTC heating sheet 100 for connecting external power-on devices as the first electrode post 110 and the second electrode post 120 respectively. Define the insulation layer of the PTC heating sheet 100 close to the first electrode post 110 as the first insulation layer 130, and the insulation layer of the PTC heating sheet 100 close to the second electrode post 120 as the second insulation layer 140. The insulation test method includes the following steps:

[0039] Arrange a first conductive plate 210 and a second conductive plate 220 on both sides of the PTC heating sheet 100 respectively, and make the first conductive plate 210 closely fit the first insulation layer 130, and make the second conductive plate 220 closely fit the second insulation layer 140;

[0040] Connect the positive pole and the negative pole of a charged detection device (not shown in the figure) to the first electrode post 110 and the first conductive plate 210 respectively, and detect the current value of the charged detection device. When the current value displayed by the charged detection device is less than the preset current value, the insulation detection result of the PTC heating sheet 100 is qualified. When the current value displayed by the charged detection device is greater than or equal to the preset current value, the insulation detection result of the PTC heating sheet 100 is unqualified;

[0041] Connect the positive pole and the negative pole of the charged detection device to the second electrode post 120 and the second conductive plate 220 respectively, and detect the current value of the charged detection device. When the current value displayed by the charged detection device is less than the preset current value, the insulation detection result of the PTC heating sheet 100 is qualified. When the current value displayed by the charged detection device is greater than or equal to the preset current value, the insulation detection result of the PTC heating sheet 100 is unqualified.

[0042] By setting the first conductive plate 210 to closely fit the first insulating layer 130, if the first insulating layer 130 is damaged, the damaged part of the first insulating layer 130 will directly contact the first conductive plate 210, so that the first pole 110 and the first conductive plate 210 can be conducted through the damaged part of the first insulating layer 130. In this way, the positive and negative poles of the live detection device will be conducted to form an electrical circuit. At this time, the current value displayed by the live detection device will be significantly greater than the preset current value. If the first insulating layer 130 is intact, the first pole 110 and the first conductive plate 210 cannot pass through the first insulating layer 130 to form a conductive circuit. In this way, the positive and negative poles of the live detection device will not be conducted to form an electrical circuit.

[0043] Similarly, by setting the second conductive plate 220 to closely fit the second insulating layer 140, if the second insulating layer 140 is damaged, the damaged part of the second insulating layer 140 will directly contact the second conductive plate 220, so that the second pole 120 and the second conductive plate 220 can be conducted through the damaged part of the second insulating layer 140. In this way, the positive and negative poles of the live detection device will be conducted to form an electrical circuit. At this time, the current value displayed by the live detection device will be significantly greater than the preset current value. If the second insulating layer 140 is intact, the second pole 120 and the second conductive plate 220 cannot pass through the second insulating layer 140 to form a conductive circuit. In this way, the positive and negative poles of the live detection device will not be conducted to form an electrical circuit.

[0044] As can be seen from the above, it is only necessary to detect once to know whether the first insulating layer 130 or the second insulating layer 140 is damaged. In this way, the insulation detection efficiency of the PTC heating sheet 100 is greatly improved.

[0045] In one embodiment, the detection voltage of the live detection device is the rated voltage.

[0046] Specifically, the rated voltage value is between 2500V and 3000V, and the corresponding preset current value is 5mA.

[0047] Specifically, in one embodiment, the live detection device is an insulation detector.

[0048] In this way, the detection efficiency of the live detection device is improved.

[0049] In one embodiment, both the first conductive plate 210 and the second conductive plate 220 are copper plates.

[0050] In this way, the conductivity of the first conductive plate 210 and the second conductive plate 220 is improved.

[0051] Further, in one embodiment, the insulation test method further includes the following steps:

[0052] A first flexible conductive pad (not shown in the figure) is disposed between the first insulating layer 130 and the first conductive plate 210, and the first insulating layer 130 and the first conductive plate 210 are pressed against the first flexible conductive pad in opposite directions, so that both sides of the first flexible conductive pad are closely attached to the first insulating layer 130 and the first conductive plate 210 respectively.

[0053] With such a setting, the bonding degree between the first conductive layer and the first insulating layer 130 is greatly enhanced, and the generation of a gap between the first conductive layer and the first insulating layer 130 is avoided, which may affect the insulation detection effect of the first insulating layer 130.

[0054] Further, in an embodiment, the material of the first flexible conductive pad is conductive plastic or conductive rubber.

[0055] Correspondingly, the insulation testing method further includes the following steps:

[0056] A second flexible conductive pad (not shown in the figure) is disposed between the second insulating layer 140 and the second conductive plate 220, and the second insulating layer 140 and the second conductive plate 220 are pressed against the second flexible conductive pad in opposite directions, so that both sides of the second flexible conductive pad are closely attached to the second insulating layer 140 and the second conductive plate 220 respectively.

[0057] With such a setting, the bonding degree between the second conductive layer and the second insulating layer 140 is greatly enhanced, and the generation of a gap between the second conductive layer and the second insulating layer 140 is avoided, which may affect the insulation detection effect of the second insulating layer 140.

[0058] In an embodiment, the material of the second flexible conductive pad is conductive plastic or conductive rubber.

[0059] Please refer to Figures 2 - 5 , the present application further provides an insulation testing device for the PTC heating sheet 100. The insulation testing device includes an integrated mounting plate 300, a bottom bracket 310, a first driving element 400, and a plurality of movable pressing plates 500. The bottom bracket 310 and the first driving element 400 are respectively installed at two ends of the integrated mounting plate 300. A plurality of movable pressing plates 500 are disposed between the bottom bracket 310 and the first driving element 400, and the plurality of movable pressing plates 500 are arranged in sequence along the direction from the first driving element 400 to the bottom bracket 310. Adjacent movable pressing plates 500 are spaced apart to form a movable gap 510. A set of testing components 200 is disposed in each movable gap 510. The testing components 200 include a first conductive plate 210 and a second conductive plate 220. The PTC heating sheet 100 is clamped between the first conductive plate 210 and the second conductive plate 220. The first driving element 400 can sequentially push the plurality of movable pressing plates 500 to move towards the bottom bracket 310, so that adjacent movable pressing plates 500 apply a preset pressure to the testing components 200 disposed in the movable gap 510.

[0060] With such a setting, the insulation of multiple PTC heating sheets 100 can be tested synchronously. Moreover, due to the squeezing effect of the first driving element 400, the degree of adhesion between the first conductive plate 210 and the first insulating layer 130 is greatly improved, avoiding the generation of gaps between the first conductive plate 210 and the first insulating layer 130, thereby improving the insulation detection accuracy of the first insulating layer 130. Similarly, the degree of adhesion between the second conductive plate 220 and the second insulating layer 140 is also greatly improved, avoiding the generation of gaps between the second conductive plate 220 and the second insulating layer 140, thereby improving the insulation detection accuracy of the second insulating layer 140.

[0061] Specifically, in one embodiment, the first driving element 400 is a cylinder or a driving motor.

[0062] In one embodiment, as Figures 2 - 5 shown, the insulation testing device further includes a first guiding shaft 610 and a second guiding shaft 620 respectively fixedly connected to the integrated mounting plate 300. The first guiding shaft 610 sequentially passes through one end of multiple movable pressing plates 500 and is movably engaged with the multiple movable pressing plates 500 along the length direction of the first guiding shaft 610. The second guiding shaft 620 sequentially passes through the other end of the multiple movable pressing plates 500 and is movably engaged with the multiple movable pressing plates 500 along the length direction of the second guiding shaft 620.

[0063] With such a setting, the movable pressing plate 500 can be prevented from shifting after being squeezed.

[0064] Specifically, in one embodiment, as Figure 2 shown, both ends of the first guiding shaft 610 are mounted on the integrated mounting plate 300 through a first fixing seat 611 and a second fixing seat 612 respectively. Both ends of the second guiding shaft 620 are mounted on the integrated mounting plate 300 through a third fixing seat 621 and a fourth fixing seat 622 respectively.

[0065] Furthermore, in one embodiment, as Figures 2 - 5 shown, the insulation testing device further includes multiple first return springs 613 and multiple second return springs 623. The first return springs 613 are sleeved outside the first guiding shaft 610, and both ends of the first return springs 613 are respectively connected to adjacent movable pressing plates 500. When the first driving element 400 pushes adjacent movable pressing plates 500 to approach each other, the first return springs 613 have a tendency to push the adjacent movable pressing plates 500 to move in the direction away from each other. The second return springs 623 are sleeved outside the second guiding shaft 620, and both ends of the second return springs 623 are respectively connected to adjacent movable pressing plates 500. When the first driving element 400 pushes adjacent movable pressing plates 500 to approach each other, the second return springs 623 have a tendency to push the adjacent movable pressing plates 500 to move in the direction away from each other.

[0066] In this way, under the pushing of the first return spring 613 and the second return spring 623, the movable pressure plate 500 can be automatically reset, which is also beneficial to taking out the test component 200 from the movable gap 510.

[0067] In one embodiment, as Figures 3 - 5 shown, the insulation test device further includes a pushing component 800 and a second driving element 700. The second driving element 700 is installed on the integrated mounting plate 300. The pushing component 800 is arranged on the side of the movable pressure plate 500 close to the integrated mounting plate 300. One end of the pushing component 800 abuts against the output end of the second driving element 700, and the other end extends into the movable gap 510 and abuts against the PTC heating sheet 100, so that the second driving element 700 can drive the pushing component 800 to push the PTC heating sheet 100 out of the movable gap 510.

[0068] In this way, it is beneficial to take out the PTC heating sheet 100 from the movable gap 510.

[0069] Further, in one embodiment, as Figures 3 - 5 shown, the pushing component 800 includes a main connecting plate 810, branch connecting plates 820, a push plate 830 and a movable shaft 840. One end of the main connecting plate 810 is connected to the output end of the second driving element 700, and the other end abuts against a plurality of branch connecting plates 820. The plurality of branch connecting plates 820 are distributed along the arrangement direction of the movable pressure plate 500 and are arranged in one-to-one correspondence with the movable pressure plate 500. One end of the movable shaft 840 is connected to the branch connecting plate 820, and the other end is inserted into the corresponding movable pressure plate 500 and is movably matched with the movable pressure plate 500 along the pushing direction of the pushing component 800, so that the branch connecting plate 820 can be movably connected to the corresponding movable pressure plate 500 through the movable shaft 840. One end of the push plate 830 is connected to the branch connecting plate 820, and the other end extends into the corresponding movable gap 510 and abuts against the PTC heating sheet 100, so that the second driving element 700 can drive the main connecting plate 810 to synchronously push a plurality of branch connecting plates 820 to drive the corresponding push plate 830 to push the PTC heating sheet 100.

[0070] As can be seen from the above, the main connecting plate 810 and the second driving element 700 are both mounted on the integrated mounting plate 300, which is conducive to improving the assembly stability of the main connecting plate 810 and the second driving element 700. The branch connecting plate 820, the movable shaft 840 and the push plate 830 are all connected to the corresponding movable pressing plate 500, and the branch connecting plate 820 abuts against the main connecting plate 810. In this way, it is ensured that the branch connecting plate 820, the movable shaft 840 and the push plate 830 can move along the arrangement direction of the movable pressing plate 500, and it can also ensure that the driving force of the second driving element 700 can be transmitted to each branch connecting plate 820 through the main connecting plate 810, which greatly improves the movement flexibility of the push plate 830 assembly.

[0071] Specifically, in one embodiment, the second driving element 700 is a cylinder or a driving motor.

[0072] Furthermore, in one embodiment, if Figure 4 As shown, four driving cylinders are provided at one end of the integrated mounting plate 300 away from the main connecting plate 810 .

[0073] This helps to ensure that the second driving element 700 can stably output driving force.

[0074] In one embodiment, if Figure 2 As shown, handles 320 are respectively provided at both ends of the integrated mounting plate 300 to facilitate taking and placing of the insulation test equipment.

[0075] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. An insulation testing device for a PTC heating sheet, characterized in that, The insulation test of the PTC heating sheet (100) is carried out by an insulation test method. The insulation test equipment includes an integrated mounting plate (300), a bottom bracket (310), a first driving element (400) and a plurality of movable pressing plates (500). The bottom bracket (310) and the first driving element (400) are respectively installed at two ends of the integrated mounting plate (300). A plurality of the movable pressing plates (500) are arranged between the bottom bracket (310) and the first driving element (400). The plurality of movable pressing plates (500) are arranged in sequence along the direction from the first driving element (400) to the bottom bracket (310). Adjacent movable pressing plates (500) are spaced apart to form a movable gap (510). A set of test components (200) is arranged in each movable gap (510). The test component (200) includes a first conductive plate (210) and a second conductive plate (220). The PTC heating sheet (100) is clamped between the first conductive plate (210) and the second conductive plate (220). The first driving element (400) can sequentially push the plurality of movable pressing plates (500) to move towards the bottom bracket (310) so that adjacent movable pressing plates (500) can apply a preset pressure to the test component (200) arranged in the movable gap (510). Define the two electrode posts of the PTC heating sheet (100) for connecting external energized devices as the first electrode post (110) and the second electrode post (120) respectively. Define the insulating layer of the PTC heating sheet (100) close to the first electrode post (110) as the first insulating layer (130), and the insulating layer of the PTC heating sheet (100) close to the second electrode post (120) as the second insulating layer (140). The insulation test method includes the following steps: The first conductive plate (210) and the second conductive plate (220) are respectively arranged on both sides of the PTC heating sheet (100), and the first conductive plate (210) is closely attached to the first insulating layer (130), and the second conductive plate (220) is closely attached to the second insulating layer (140). Connect the positive electrode and the negative electrode of the charged detection device to the first electrode post (110) and the first conductive plate (210) respectively, and detect the current value of the charged detection device. When the current value displayed by the charged detection device is less than the preset current value, the insulation test result of the PTC heating sheet (100) is qualified. When the current value displayed by the charged detection device is greater than or equal to the preset current value, the insulation test result of the PTC heating sheet (100) is unqualified. Connect the positive electrode and the negative electrode of the charged detection device to the second electrode post (120) and the second conductive plate (220) respectively, and detect the current value of the charged detection device. When the current value displayed by the charged detection device is less than the preset current value, the insulation test result of the PTC heating sheet (100) is qualified. When the current value displayed by the charged detection device is greater than or equal to the preset current value, the insulation test result of the PTC heating sheet (100) is unqualified.

2. The insulation testing device according to claim 1, wherein The insulation test method adopted by the insulation test equipment further includes the following steps: A first flexible conductive pad is arranged between the first insulating layer (130) and the first conductive plate (210), and the first insulating layer (130) and the first conductive plate (210) are pressed against the first flexible conductive pad in opposite directions, so that both sides of the first flexible conductive pad are tightly attached to the first insulating layer (130) and the first conductive plate (210) respectively; A second flexible conductive pad is arranged between the second insulating layer (140) and the second conductive plate (220), and the second insulating layer (140) and the second conductive plate (220) are pressed against the second flexible conductive pad in opposite directions, so that both sides of the second flexible conductive pad are tightly attached to the second insulating layer (140) and the second conductive plate (220) respectively.

3. The insulation testing device according to claim 2, wherein, The material of the first flexible conductive pad is conductive plastic or conductive rubber; And / or, the material of the second flexible conductive pad is conductive plastic or conductive rubber.

4. The insulation testing device according to claim 1, characterized in that, The detection voltage of the live detection device is the rated voltage.

5. The insulation testing device according to claim 1, characterized in that, It further includes a first guide shaft (610) and a second guide shaft (620) respectively fixedly connected to the integrated mounting plate (300). The first guide shaft (610) sequentially passes through one end of a plurality of the movable pressing plates (500) and is movably matched with the plurality of movable pressing plates (500) along the length direction of the first guide shaft (610). The second guide shaft (620) sequentially passes through the other end of the plurality of movable pressing plates (500) and is movably matched with the plurality of movable pressing plates (500) along the length direction of the second guide shaft (620).

6. The insulation testing device according to claim 5, characterized in that, It further includes a plurality of first return springs (613) and a plurality of second return springs (623). The first return springs (613) are sleeved outside the first guide shaft (610), and both ends of the first return springs (613) are respectively connected to adjacent movable pressing plates (500). When the first driving element (400) pushes adjacent movable pressing plates (500) to approach each other, the first return springs (613) have a tendency to push adjacent movable pressing plates (500) to move away from each other; the second return springs (623) are sleeved outside the second guide shaft (620), and both ends of the second return springs (623) are respectively connected to adjacent movable pressing plates (500). When the first driving element (400) pushes adjacent movable pressing plates (500) to approach each other, the second return springs (623) have a tendency to push adjacent movable pressing plates (500) to move away from each other.

7. The insulation testing device according to claim 1, characterized in that, It further includes a pushing component (800) and a second driving element (700). The second driving element (700) is installed on the integrated mounting plate (300). The pushing component (800) is disposed on a side of the movable pressure plate (500) close to the integrated mounting plate (300), and one end of the pushing component (800) abuts against the output end of the second driving element (700), and the other end extends into the movable gap (510) and abuts against the PTC heating sheet (100), so that the second driving element (700) can drive the pushing component (800) to push the PTC heating sheet (100) out of the movable gap (510).

8. The insulation testing device according to claim 7, characterized in that, The pushing component (800) includes a main connecting plate (810), branch connecting plates (820), a push plate (830) and a movable shaft (840). One end of the main connecting plate (810) is connected to the output end of the second driving element (700), and the other end abuts against a plurality of the branch connecting plates (820). The plurality of branch connecting plates (820) are distributed along the arrangement direction of the movable pressure plate (500) and are arranged in one-to-one correspondence with the movable pressure plate (500). One end of the movable shaft (840) is connected to the branch connecting plate (820), and the other end is inserted into the corresponding movable pressure plate (500) and is movably matched with the movable pressure plate (500) along the pushing direction of the pushing component (800), so that the branch connecting plate (820) can be movably connected to the corresponding movable pressure plate (500) through the movable shaft (840). One end of the push plate (830) is connected to the branch connecting plate (820), and the other end extends into the corresponding movable gap (510) and abuts against the PTC heating sheet (100), so that the second driving element (700) can drive the main connecting plate (810) to synchronously push the plurality of branch connecting plates (820) to drive the corresponding push plate (830) to push the PTC heating sheet (100).

9. The insulation testing device according to claim 1, characterized in that, The first driving element (400) is a cylinder or a driving motor.

Images