Test platen

Abstract

The utility model discloses a kind of test pressing plate, comprising: support plate and pressing plate, pressing plate is movable relative to support plate, and pressing plate includes first pressing surface and second pressing surface, first pressing surface and support plate are oppositely arranged, second pressing surface and first pressing surface are adjacently arranged, first pressing surface has first transition surface, first transition surface is connected with second pressing surface, first transition surface is inclined plane or curved surface, and / or second pressing surface has second transition surface, second transition surface is connected with first pressing surface, second transition surface is inclined plane or curved surface. By making first pressing surface have first transition surface connected with second pressing surface, and making first transition surface be inclined plane or curved surface, and / or second pressing surface have second transition surface connected with first pressing surface, and second transition surface is inclined plane or curved surface, it is favorable to improve the stress uniformity of the article to be tested, reduce the risk of tearing the article to be tested, and it is favorable to extend the transition length of the bending place of the article to be tested, to reduce the risk of rebounding of the article to be tested.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, and in particular to a testing pressure plate. Background Technology

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, batteries, as the power source, play an irreplaceable and crucial role. During the battery production process, the battery cells undergo hot-pressing shaping. This process allows for the detection of dust and foreign objects inside the battery cells. Therefore, to ensure the safety of the battery before it leaves the factory, a Hi-pot test (High Potential Test) is typically performed on the battery cells during the hot-pressing process.

[0003] In related technologies, an unreasonable design of the pressure plate leads to stress concentration on the tabs during Hi-pot testing, which makes the tabs prone to tearing and causing them to bounce upwards. This results in missed soldering during subsequent welding processes, affecting the quality and safety of the battery cell. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a test pressure plate, which helps to improve the uniformity of force distribution on the test item under pressure, reduces the risk of tearing, and also helps to reduce the risk of the test item rebounding and warping.

[0005] A test pressure plate according to an embodiment of this application includes: a support plate for supporting an item to be tested; and a pressure plate movable relative to the support plate. The pressure plate includes a first pressure surface and a second pressure surface. The first pressure surface and the support plate are disposed opposite to each other, and the second pressure surface and the first pressure surface are disposed adjacent to each other. The first pressure surface has a first transition surface connected to the second pressure surface. The first transition surface is an inclined surface or a curved surface. And / or the second pressure surface has a second transition surface connected to the first pressure surface. The second transition surface is an inclined surface or a curved surface.

[0006] In the above technical solution, by making the first pressing surface have a first transition surface connected to the second pressing surface, and making the first transition surface an inclined surface or a curved surface, and / or the second pressing surface have a second transition surface connected to the first pressing surface, and the second transition surface is an inclined surface or a curved surface, it is beneficial to make the force on the test item uniformly distributed when it is pressed, reduce the risk of tearing damage to the test item, and extend the transition length at the bend of the test item to reduce the risk of the test item rebounding and lifting.

[0007] According to some embodiments of this application, a portion of the second pressing surface is curved to define the second transition surface.

[0008] In the above technical solution, by defining the second transition surface by partially defining the second pressure surface, it is beneficial to improve the processing convenience of the pressure plate and increase the production efficiency of the test pressure plate. By further constructing the second transition surface as a curved surface, the pressure on the test item is evenly distributed, reducing the risk of tearing of the test item due to excessive local stress. It can also extend the bending transition length of the test item, reducing the risk of the test item rebounding and tilting after the pressure plate is lifted. Furthermore, it is beneficial to reduce local friction and extrusion on the second transition surface, thereby extending the service life of the pressure plate.

[0009] According to some embodiments of this application, the second transition surface is an arc surface.

[0010] In the above technical solution, by constructing the second transition surface as an arc surface, the connection between the second pressure surface and the first pressure surface can be continuously and smoothly changed, which helps to disperse the pressure on the test item, reduce the risk of the test item warping or tearing, and at the same time helps to improve the fatigue resistance of the pressure plate and extend the service life of the pressure plate, thereby helping to improve the service life of the test pressure plate.

[0011] According to some embodiments of this application, in the height direction parallel to the second pressing surface, the end of the second transition surface that is furthest from the first pressing surface is lower than the middle of the second pressing surface.

[0012] In the above technical solution, by making the end of the second transition surface that is furthest from the first pressing surface lower than the middle of the second pressing surface, it is beneficial to reduce the material removal of the pressing plate, thereby improving the structural strength of the pressing plate and improving the processing efficiency of the pressing plate.

[0013] According to some embodiments of this application, the second pressing surface is integrally formed as an arc surface to define the second transition surface.

[0014] In the above technical solution, by making the second pressing surface as a circular arc surface, it is beneficial to further extend the bending transition length of the test item, reduce the risk of the test item rebounding and tilting after the pressing plate is lifted, and at the same time, it is beneficial to further improve the uniformity of the force on the test item and reduce the risk of the test item tearing.

[0015] According to some embodiments of this application, the first pressing surface is provided with a first transition surface, the second pressing surface is provided with a second transition surface, and the first transition surface and the second transition surface are connected.

[0016] In the above technical solution, by providing a first transition surface on the first pressing surface, which can be an inclined surface or a curved surface, and by providing a second transition surface on the second pressing surface, the first transition surface and the second transition surface are connected, and the second transition surface can be an inclined surface or a curved surface, it is beneficial to further eliminate the sharp corner structure of the pressing plate, thereby further improving the uniformity of force on the test item and reducing the risk of the test item tilting up after the pressing plate is lifted, or the test item tearing after being pressed.

[0017] According to some embodiments of this application, both the first transition surface and the second transition surface are inclined surfaces.

[0018] In the above technical solution, by constructing both the first transition surface and the second transition surface as inclined surfaces, it is beneficial to improve the processing convenience of the first transition surface and the second transition surface, thereby improving the processing efficiency of the pressure plate and further improving the production efficiency of the test pressure plate.

[0019] According to some embodiments of this application, the tilt angle of the first transition surface is smaller than the tilt angle of the second transition surface.

[0020] In the above technical solution, by making the tilt angle of the first transition surface small, it is beneficial to further reduce the impact force generated on the test item when the pressure plate comes into contact with the test item, thereby reducing the risk of tearing of the test item due to stress concentration. By making the tilt angle of the second transition surface further tilted, it is beneficial to increase the transition length between the first pressure surface and the second pressure surface, thereby extending the bending transition length of the test item and reducing the risk of the test item tilting after the pressure plate is lifted.

[0021] According to some embodiments of this application, on a projection surface parallel to the first pressing surface, the width of the orthographic projection of the first transition surface is greater than the width of the orthographic projection of the second transition surface.

[0022] In the above technical solution, on the projection surface parallel to the first pressure surface, by making the width of the orthographic projection of the first transition surface greater than the width of the orthographic projection of the second transition surface, it is beneficial to increase the contact area between the test item and the first transition surface, thereby reducing the impact force generated on the test item when the pressure plate contacts the test item, and also beneficial to extend the bending transition length of the test item, reducing the risk of the test item tilting after the pressure plate is lifted.

[0023] According to some embodiments of this application, in the height direction parallel to the second pressing surface, the end of the second transition surface that is furthest from the first pressing surface is located on the upper part of the second pressing surface.

[0024] The above technical solution helps to further extend the transition length between the first and second pressing surfaces, reducing the risk of the test item tilting up after the pressing plate is lifted.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a schematic diagram of the test plate of the embodiment of this application when it comes into contact with the test item;

[0028] Figure 2 This is a schematic diagram of the test platen applying pressure to the test item as described in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of the test plate after it has been lifted, as described in the embodiments of this application.

[0030] Figure 4 This is a side view of the pressure plate described in some embodiments of this application;

[0031] Figure 5 This is a top view of the pressure plate described in some embodiments of this application;

[0032] Figure 6 This is a front view of the pressure plate described in some embodiments of this application;

[0033] Figure 7 This is a side view of the pressure plate described in other embodiments of this application;

[0034] Figure 8 This is a top view of the pressure plate described in some other embodiments of this application;

[0035] Figure 9 This is a front view of the pressure plate described in some other embodiments of this application;

[0036] Figure 10 This is a side view of the pressure plate described in some embodiments of this application;

[0037] Figure 11 This is a top view of the pressure plate described in some embodiments of this application;

[0038] Figure 12 This is a front view of the pressure plate described in some embodiments of this application.

[0039] Figure label:

[0040] Test pressure plate 100

[0041] Support plate 110

[0042] Pressure plate 120, first pressure surface 121, first transition surface 1211, second pressure surface 122, second transition surface 1221

[0043] 200 items to be tested. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0046] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0049] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0050] In this application, "multiple" means two or more (including two).

[0051] The battery mentioned in the embodiments of this application refers to a single physical module comprising multiple battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application can be a battery module or a battery pack. A battery module generally includes multiple battery cells. A battery generally includes a housing for encapsulating multiple battery cells or multiple battery modules, the housing preventing liquids or other foreign matter from affecting the charging or discharging of the battery cells; of course, a battery may also not include a housing.

[0052] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, batteries, as the power source, play an irreplaceable and crucial role. Furthermore, as a core component of new energy vehicles, batteries have high safety requirements. During the battery production process, the battery cell pack undergoes hot-pressing shaping. This process allows for the detection of dust and foreign objects inside the battery cell pack. Therefore, to ensure the safety of the battery before it leaves the factory, a Hi-pot (High Potential Test) test, i.e., a high-voltage test, is typically performed on the battery cell pack during the hot-pressing process.

[0053] In related technologies, an unreasonable design of the pressure plate leads to stress concentration on the tabs during Hi-pot testing, which makes the tabs prone to tearing and causing them to bounce upwards. This results in missed soldering during subsequent welding processes, affecting the quality and safety of the battery cell.

[0054] Based on the above considerations, in order to reduce the risk of the tab rebounding or tearing, a test pressure plate is proposed. The test pressure plate includes a support plate and a pressure plate. The support plate is used to support the item to be tested. The pressure plate is movable relative to the support plate. The pressure plate includes a first pressure surface and a second pressure surface. The first pressure surface and the support plate are arranged opposite to each other. The second pressure surface and the first pressure surface are arranged adjacent to each other. The first pressure surface has a first transition surface. The first transition surface is connected to the second pressure surface. The first transition surface is an inclined surface or a curved surface. And / or the second pressure surface has a second transition surface. The second transition surface is connected to the first pressure surface. The second transition surface is an inclined surface or a curved surface.

[0055] In the above technical solution, by making the first pressing surface have a first transition surface connected to the second pressing surface, and making the first transition surface an inclined surface or a curved surface, and / or the second pressing surface have a second transition surface connected to the first pressing surface, and the second transition surface is an inclined surface or a curved surface, it is beneficial to make the force on the test item uniformly distributed when it is pressed, reduce the risk of tearing damage to the test item, and extend the transition length at the bend of the test item to reduce the risk of the test item rebounding and lifting.

[0056] Please combine Figures 1 to 3 , Figure 4 , Figure 7 as well as Figure 10 In some embodiments of this application, the test plate 100 includes a support plate 110 and a pressure plate 120. The support plate 110 is used to support the test item 200. The pressure plate 120 is movable relative to the support plate 110. The pressure plate 120 includes a first pressure surface 121 and a second pressure surface 122. The first pressure surface 121 and the support plate 110 are disposed opposite to each other. The second pressure surface 122 and the first pressure surface 121 are disposed adjacent to each other. The first pressure surface 121 has a first transition surface 1211. The first transition surface 1211 is connected to the second pressure surface 122. The first transition surface 1211 is an inclined surface or a curved surface. And / or the second pressure surface 122 has a second transition surface 1221. The second transition surface 1221 is connected to the first pressure surface 121. The second transition surface 1221 is an inclined surface or a curved surface.

[0057] In the above technical solution, by making the first pressing surface 121 have a first transition surface 1211 connected to the second pressing surface 122, and making the first transition surface 1211 an inclined surface or a curved surface, and / or making the second pressing surface 122 have a second transition surface 1221 connected to the first pressing surface 121, and the second transition surface 1221 an inclined surface or a curved surface, it is beneficial to make the force on the test item 200 uniformly distributed when it is pressed, reducing the risk of tearing of the test item 200 due to stress concentration, and also beneficial to extend the transition length at the bend of the test item 200, so as to reduce the risk of the test item 200 rebounding and lifting.

[0058] For example, the test plate 100 can be used as a test plate 100 for performing Hi-pot testing on the battery cell pack during the hot pressing process. The item to be tested 200 can be a tab, which can be placed on the support plate 110 and supported by the support plate 110.

[0059] After the tab is placed on the support plate 110, the pressure plate 120 can move towards the support plate 110 to apply pressure to the tab and clamp it between the pressure plate 120 and the support plate 110. During this process, the connection between the first pressure surface 121 and the second pressure surface 122 will contact the tab and apply pressure. If the connection between the first pressure surface 121 and the second pressure surface 122 forms a right angle structure, a right angle imprint will be formed at the position where the tab contacts the right angle structure during the pressure plate 120 applying pressure to the tab. When the pressure plate 120 is lifted, the tab is prone to rebound and lift up, which may cause incomplete welding in subsequent welding processes, affecting the quality and safety of the battery cell. In addition, there will be stress concentration at the position where the tab contacts the right angle structure, increasing the risk of the tab tearing, which will also affect the quality and safety of the battery cell.

[0060] In some examples, the surface of the pressure plate 120 opposite to the support plate 110 is defined as the first pressure surface 121 of the pressure plate 120, and the surface of the pressure plate 120 adjacent to the first pressure surface 121 and close to the electrode tab is defined as the second pressure surface 122 of the pressure plate 120. The portion of the first pressure surface 121 close to the second pressure surface 122 can form a first transition surface 1211. The first transition surface 1211 can be formed as a curved surface, that is, the position where the first pressure surface 121 connects to the second pressure surface 122 can have a curved transition. Since the shape of the curved surface is continuously changing, it can allow the force to gradually diffuse along the tangent direction of the curved surface, thereby allowing the pressure of the pressure plate 120 on the electrode tab to be evenly distributed on the electrode tab, reducing the risk of tearing of the electrode tab due to excessive local stress. This design can extend the length of the tab bending transition, reducing the risk of the tab rebounding and warping after the pressure plate 120 is lifted. This helps reduce the risk of missed welds in subsequent welding processes, improving the quality and safety of the battery cell. Alternatively, the first transition surface 1211 can be formed as a slope, allowing a linear and smooth transition at the connection between the first pressure surface 121 and the second pressure surface 122, eliminating right-angle turns. This allows the pressure of the pressure plate 120 on the tab to be evenly distributed on the tab, reducing the risk of tearing due to excessive local stress. It also extends the length of the tab bending transition, reducing the risk of the tab rebounding and warping after the pressure plate 120 is lifted. This helps reduce the risk of missed welds in subsequent welding processes, improving the quality and safety of the battery cell.

[0061] In other examples, the second pressure surface 122 has a second transition surface 1221 connected to the first pressure surface 121. For example, the second pressure surface 122 can be entirely formed as the second transition surface 1221, or the portion of the second pressure surface 122 connected to the first pressure surface 121 can be formed as the second transition surface 1221. The second transition surface 1221 can be formed as a curved surface, that is, the position where the second pressure surface 122 connects to the first pressure surface 121 can have a curved transition. The curved shape allows the pressure of the pressure plate 120 on the electrode tab to gradually diffuse along the tangent direction of the curved surface, which is beneficial to make the pressure on the electrode tab evenly distributed, reduce the risk of tearing of the electrode tab due to excessive local stress, and can extend the life of the electrode. The length of the tab bending transition reduces the risk of the tab rebounding and tilting after the pressure plate 120 is lifted, thereby reducing the risk of missed welding in subsequent welding processes and improving the quality and safety of the battery cell; or the second transition surface 1221 can be formed as a slope, so that the position where the second pressure surface 122 connects with the first pressure surface 121 can have a linear and smooth transition, eliminating right-angle turns, which helps to improve the uniformity of force on the tab, reduce the risk of the tab tearing due to local stress concentration, and can extend the length of the tab bending transition, reducing the risk of the tab rebounding and tilting after the pressure plate 120 is lifted, thereby reducing the risk of missed welding in subsequent welding processes and improving the quality and safety of the battery cell.

[0062] In some other embodiments, the first pressing surface 121 of the pressure plate 120 may have a first transition surface 1211, and the second pressing surface 122 of the pressure plate 120 may have a second transition surface 1221. The first transition surface 1211 may be an inclined surface or a curved surface, and the second transition surface 1221 may be an inclined surface or a curved surface. It is understood that the specific configuration of the first transition surface 1211 and the second transition surface 1221 of the pressure plate 120 may be determined according to actual production requirements, and no specific limitation is made here.

[0063] Combination Figures 4 to 6 In some embodiments of this application, a portion of the second pressing surface 122 is curved to define the second transition surface 1221.

[0064] In the above technical solution, by partially defining the second transition surface 1221 by the second pressure surface 122, it is beneficial to improve the processing convenience of the pressure plate 120 and the production efficiency of the test pressure plate 100. By further constructing the second transition surface 1221 as a curved surface, the pressure on the test item 200 is evenly distributed, reducing the risk of tearing of the test item 200 due to excessive local stress. It can also extend the bending transition length of the test item 200, reducing the risk of the test item 200 rebounding and tilting after the pressure plate 120 is lifted. Furthermore, it is beneficial to reduce local friction and extrusion of the second transition surface 1221, thereby extending the service life of the pressure plate 120.

[0065] For example, in the direction of movement parallel to the pressure plate 120, it can also be understood that in the direction of height parallel to the second pressure surface 122, the second pressure surface 122 can define a curved second transition surface 1221 from the middle to a position close to the first pressure surface 121. That is, the end of the second transition surface 1221 that is farthest from the first pressure surface 121 can be located in the middle of the second pressure surface 122; or, the end of the second transition surface 1221 that is farthest from the first pressure surface 121 can be higher than the middle of the second pressure surface 122; or, the end of the second transition surface 1221 that is farthest from the first pressure surface 121 can be lower than the middle of the second pressure surface 122.

[0066] It is understandable that the specific setting of the second transition surface 1221 can be determined according to the actual production requirements, and no specific limitation is made here, as long as part of the second pressing surface 122 is a curved surface to define the second transition surface 1221.

[0067] Reference Figure 4 In some embodiments of this application, the second transition surface 1221 is an arc surface.

[0068] In the above technical solution, by constructing the second transition surface 1221 as an arc surface, the connection between the second pressure surface 122 and the first pressure surface 121 can be continuously and smoothly changed, which helps to disperse the pressure on the test item 200, reduce the risk of the test item 200 warping or tearing, and at the same time helps to improve the fatigue resistance of the pressure plate 120 and extend the service life of the pressure plate 120, thereby helping to improve the service life of the test pressure plate 100.

[0069] For example, in the direction of movement parallel to the pressure plate 120, it can also be understood that in the height direction parallel to the second pressure surface 122, the second pressure surface 122 can define a second transition surface 1221 from the middle to the position close to the first pressure surface 121. The second transition surface 1221 is an arc surface, that is, the second pressure surface 122 transitions in an arc shape from the middle to the position close to the first pressure surface 121. When the pressure plate 120 applies pressure to the test item 200, the force at the position where the test item 200 contacts the second transition surface 1221 can be dispersed along the tangent direction of the second transition surface 1221, which helps to reduce the risk of stress concentration in the test item 200.

[0070] Combination Figures 4 to 6 In some embodiments of this application, in the height direction parallel to the second pressing surface 122, the end of the second transition surface 1221 that is furthest from the first pressing surface 121 is lower than the middle of the second pressing surface 122.

[0071] In the above technical solution, by making the end of the second transition surface 1221 that is furthest from the first pressing surface 121 lower than the middle of the second pressing surface 122, it is beneficial to reduce the material removal of the pressing plate 120, thereby improving the structural strength of the pressing plate 120 and improving the processing efficiency of the pressing plate 120.

[0072] For example, the second transition surface 1221 can be machined on the pressure plate 120 by machining, such as by cutting or wire cutting. In the above processing methods, a portion of the material of the pressure plate 120 is removed. In the height direction parallel to the second pressure surface 122, by making the end of the second transition surface 1221 that is furthest from the first pressure surface 121 lower than the middle of the second pressure surface 122, it is beneficial to reduce the volume of material to be removed from the pressure plate 120, thereby improving the structural strength of the pressure plate 120 and improving the processing efficiency of the pressure plate 120.

[0073] Combination Figures 1 to 3 as well as Figures 7 to 9 In some embodiments of this application, the second pressing surface 122 is integrally formed as an arc surface to define the second transition surface 1221.

[0074] In the above technical solution, by making the second pressing surface 122 as a circular arc surface, it is beneficial to further extend the bending transition length of the test item 200, reduce the risk of the test item 200 rebounding and tilting after the pressing plate 120 is lifted, and at the same time, it is beneficial to further improve the uniformity of the force on the test item 200, and reduce the risk of the test item 200 tearing.

[0075] For example, in the height direction perpendicular to the second pressure surface 122, the second pressure surface 122 can be raised in an arc shape away from the first pressure surface 121, so that the second pressure surface 122 as a whole can be formed as an arc surface. That is, the second pressure surface 122 as a whole can be constructed as a second transition surface 1221 extending in an arc shape. The area of ​​the second transition surface 1221 is effectively increased, which is beneficial to extending the bending transition length of the test item 200 in contact with the second transition surface 1221. This helps to reduce the risk of the test item 200 rebounding and tilting after the pressure plate 120 is lifted. Furthermore, the pressure on the test item 200 at the point of contact with the second transition surface 1221 can be evenly distributed along the tangent direction of the second transition surface 1221, which helps to improve the uniformity of the force on the test item 200.

[0076] Combination Figures 10 to 12 In some embodiments of this application, the first pressing surface 121 is provided with a first transition surface 1211, the second pressing surface 122 is provided with a second transition surface 1221, and the first transition surface 1211 and the second transition surface 1221 are connected.

[0077] In the above technical solution, by providing a first transition surface 1211 on the first pressing surface 121 (which can be an inclined surface or a curved surface) and a second transition surface 1221 on the second pressing surface 122, the first transition surface 1211 and the second transition surface 1221 are connected, and the second transition surface 1221 can be an inclined surface or a curved surface, it is beneficial to further eliminate the sharp corner structure of the pressing plate 120 (which can also be understood as the right-angle structure mentioned above), thereby further improving the uniformity of force on the test item 200 and reducing the risk of the test item 200 tilting up after the pressing plate 120 is lifted, or the test item 200 tearing after being pressed.

[0078] For example, the portion of the first pressing surface 121 near the second pressing surface 122 may be provided with a first transition surface 1211, and the portion of the second pressing surface 122 near the first pressing surface 121 may be provided with a second transition surface 1221. By providing the connected first transition surface 1211 and second transition surface 1221, it is beneficial to achieve a smooth transition between the first pressing surface 121 and the second pressing surface 122, thereby helping to eliminate the sharp corner structure of the pressure plate 120. For example, the first transition surface 1211 and the second transition surface 1221 may both be arc surfaces, so that the first pressing surface 121 and the second pressing surface 122 can achieve a smooth transition, thereby improving the uniformity of stress on the test item 200 and reducing the problem of tearing of the test item 200 due to stress concentration.

[0079] In some examples, both the first transition surface 1211 and the second transition surface 1221 can be curved surfaces, and the first transition surface 1211 and the second transition surface 1221 are connected; in other examples, both the first transition surface 1211 and the second transition surface 1221 can be inclined surfaces, and the first transition surface 1211 and the second transition surface 1221 are connected; in still other examples, one of the first transition surface 1211 and the second transition surface 1221 can be a curved surface, and the other of the first transition surface 1211 and the second transition surface 1221 can be an inclined surface.

[0080] It is understandable that the specific structure of the first transition surface 1211 and the second transition surface 1221 can be determined according to actual production requirements, and no specific limitations are made here.

[0081] Please refer to Figure 10 In some embodiments of this application, both the first transition surface 1211 and the second transition surface 1221 are inclined surfaces.

[0082] In the above technical solution, by constructing both the first transition surface 1211 and the second transition surface 1221 as inclined surfaces, it is beneficial to improve the processing convenience of the first transition surface 1211 and the second transition surface 1221, thereby improving the processing efficiency of the pressure plate 120, and further improving the production efficiency of the test pressure plate 100.

[0083] For example, in the height direction parallel to the second pressing surface 122, the first transition surface 1211 can extend obliquely from the first pressing surface 121 towards the second pressing surface 122. Correspondingly, the second transition surface 1221 can extend obliquely from the second pressing surface 122 towards the first pressing surface 121, and the second transition surface 1221 is connected to the first transition surface 1211. This is beneficial to improving the smoothness of the transition between the first pressing surface 121 and the second pressing surface 122. For example, the inclination angles of the first transition surface 1211 and the second transition surface 1221 can be the same, then the first pressing surface 121 and the second pressing surface 122... The connection between the two pressure surfaces 122 can be a straight transition; or, the inclination angles of the first transition surface 1211 and the second transition surface 1221 can be different, in which case the included angle formed between the first transition surface 1211 and the second transition surface 1221 is an obtuse angle. Compared with the above-mentioned sharp angle structure, the transition at the connection between the first pressure surface 121 and the second pressure surface 122 is relatively smooth, which helps to reduce the risk of the test item 200 tilting after the pressure plate 120 is lifted. Moreover, compared with other shapes, the inclined surface is easier to process, which helps to improve the processing convenience of the first transition surface 1211 and the second transition surface 1221.

[0084] like Figure 10 As shown, in some embodiments of this application, the tilt angle of the first transition surface 1211 is smaller than the tilt angle of the second transition surface 1221.

[0085] In the above technical solution, by making the tilt angle of the first transition surface 1211 small, it is beneficial to further reduce the impact force generated on the test item 200 when the pressure plate 120 comes into contact with the test item 200, thereby reducing the risk of tearing of the test item 200 due to stress concentration. By making the tilt angle of the second transition surface 1221 further tilted, it is beneficial to increase the transition length between the first pressure surface 121 and the second pressure surface 122, thereby extending the bending transition length of the test item 200 and reducing the risk of the test item 200 tilting after the pressure plate 120 is lifted.

[0086] For example, in the height direction parallel to the second pressing surface 122, the angle of inclination of the first transition surface 1211 toward the second pressing surface 122 is smaller than the angle of inclination of the second transition surface 1221 toward the second pressing surface 122. Since the first transition surface 1211 contacts the test item 200 first compared to the second transition surface 1221, making the inclination angle of the first transition surface 1211 smaller helps to improve the smoothness of the transition from the first pressing surface 121 to the second pressing surface 122, thereby helping to reduce the pressure on the test item at the connection between the first pressing surface 121 and the second pressing surface 122. The impact force generated by the test item 200 helps to reduce the risk of tearing of the test item 200 due to stress concentration. Compared with the first transition surface 1211 and the second transition surface 1221 having the same tilt angle, the transition length between the first pressure surface 121 and the second pressure surface 122 is further extended by making the second transition surface 1221 tilted further, which helps to extend the bending transition length of the test item 200 and reduce the risk of the test item 200 lifting after the pressure plate 120 is lifted.

[0087] like Figure 11 As shown, in some embodiments of this application, on a projection plane parallel to the first pressing surface 121, the width of the orthographic projection of the first transition surface 1211 is greater than the width of the orthographic projection of the second transition surface 1221.

[0088] In the above technical solution, on the projection surface parallel to the first pressure surface 121, by making the width of the orthographic projection of the first transition surface 1211 greater than the width of the orthographic projection of the second transition surface 1221, it is beneficial to increase the contact area between the test item 200 and the first transition surface 1211, thereby reducing the impact force generated on the test item 200 when the pressure plate 120 contacts the test item 200, and also beneficial to extend the bending transition length of the test item 200, reducing the risk of the test item 200 tilting after the pressure plate 120 is lifted.

[0089] For example, on the projection plane parallel to the first pressing surface 121, the width of the orthographic projection of the first transition surface 1211 is greater than the width of the orthographic projection of the second transition surface 1221. This can also be understood as the length of the first transition surface 1211 being greater than the length of the second transition surface 1221. By increasing the length of the first transition surface 1211, the contact area between the test item 200 and the first transition surface 1211 is increased. During the pressing process of the pressure plate 120, the test item 200 gradually contacts the first transition surface 1211, which helps to reduce the impact of the pressure plate 120 on the test item 200 when it first contacts the pressure plate 120. The impact force generated by the test item 200 is beneficial to increasing the bending transition length of the test item 200. When the length of the test item 200 is constant, since the contact area between the test item 200 and the first transition surface 1211 is increased, the contact area between the test item 200 and the second pressing surface 122 can be reduced. Since the second pressing surface 122 is provided with a second transition surface 1221, under the action of the second transition surface 1221, the bending transition length of the test item 200 can be further increased, which is beneficial to reducing the risk of the test item 200 tilting after the pressure plate 120 is lifted.

[0090] like Figure 12 As shown, in some embodiments of this application, in the height direction parallel to the second pressing surface 122, the end of the second transition surface 1221 that is furthest from the first pressing surface 121 is located on the upper part of the second pressing surface 122.

[0091] The above technical solution is beneficial to further extend the transition length between the first pressing surface 121 and the second pressing surface 122, and reduce the risk of the test item 200 tilting up after the pressing plate 120 is lifted.

[0092] For example, in the height direction parallel to the second pressing surface 122, it can also be understood that in the direction parallel to the movement of the pressure plate 120, the end of the second transition surface 1221 that is furthest from the first pressing surface 121 exceeds the middle of the second pressing surface 122. This is beneficial to increase the length of the second pressing surface 122, thereby extending the transition length between the first pressing surface 121 and the second pressing surface 122, and further extending the bending transition length of the test item 200, so as to reduce the risk of the test item 200 tilting after the pressure plate 120 is lifted.

Claims

1. A test pressure plate, characterized in that, include: A support plate, the support plate being used to support the item to be tested; A pressure plate, which is movable relative to the support plate, includes a first pressure surface and a second pressure surface. The first pressure surface and the support plate are disposed opposite to each other, and the second pressure surface and the first pressure surface are disposed adjacent to each other. The first pressure surface has a first transition surface, which is connected to the second pressure surface. The first transition surface is an inclined surface or a curved surface. And / or the second pressure surface has a second transition surface, which is connected to the first pressure surface. The second transition surface is an inclined surface or a curved surface.

2. The test plate according to claim 1, characterized in that, The second pressing surface is a curved surface to define the second transition surface.

3. The test plate according to claim 2, characterized in that, The second transition surface is a circular arc surface.

4. The test plate according to claim 2, characterized in that, In the height direction parallel to the second pressing surface, the end of the second transition surface that is furthest from the first pressing surface is lower than the middle of the second pressing surface.

5. The test plate according to claim 1, characterized in that, The second pressing surface is formed as an arc surface to define the second transition surface.

6. The test plate according to claim 1, characterized in that, The first pressing surface has a first transition surface, and the second pressing surface has a second transition surface. The first transition surface and the second transition surface are connected.

7. The test plate according to claim 6, characterized in that, Both the first transition surface and the second transition surface are inclined surfaces.

8. The test plate according to claim 7, characterized in that, The tilt angle of the first transition surface is smaller than the tilt angle of the second transition surface.

9. The test plate according to claim 6, characterized in that, On the projection plane parallel to the first pressure surface, the width of the orthographic projection of the first transition surface is greater than the width of the orthographic projection of the second transition surface.

10. The test plate according to claim 6, characterized in that, In the height direction parallel to the second pressing surface, the end of the second transition surface that is furthest from the first pressing surface is located at the upper part of the second pressing surface.

Images