Compression device

Abstract

The utility model discloses a compression device. The compression device comprises a first compression piece, a second compression piece and a connecting piece. The connecting piece is connected with the first compression piece and the second compression piece, so that the first compression piece can move oppositely relative to the second compression piece, and a sample placed between the first compression piece and the second compression piece can be compressed. In addition, at least one of the first compression part and the second compression part is provided with a protruding structure, so that the situation that the compression face is too large in the related technology can be avoided, compression of the local area of the sample is achieved, and therefore the compression condition of the sample under the actual working condition can be closer to that of the sample; and the accuracy of measuring the compression set performance of the sample can be improved.

Description

Technical Field

[0001] The present application relates to the field of detection, and in particular to a compression device. Background Art

[0002] A compression device is a device used to test the compression set properties of materials.

[0003] The current compression device includes an upper pressing plate and a lower pressing plate. The sample to be tested is compressed by placing the sample to be tested between the upper pressing plate and the lower pressing plate. Therefore, the compression device compresses the entire surface of the sample to be tested and cannot control the compression surface of the sample.

[0004] However, under actual working conditions, only a local area of ​​the sealing ring is compressed. Due to the long-term local compression or overall compression of the sealing ring, there are large differences in the resilience performance of the sealing ring. Therefore, the accuracy of measuring the compression permanent deformation performance of the sealing ring using the above-mentioned compression device is poor. Utility Model Content

[0005] The embodiment of the present application provides a compression device. The technical solution is as follows:

[0006] A compression device is provided, comprising: a first compression member, a second compression member and a connecting member;

[0007] The first compression member and the second compression member are arranged opposite to each other, the first compression member has a first convex structure on a side facing the second compression member, and / or the second compression member has a second convex structure on a side facing the first compression member;

[0008] The connecting member is connected to the first compression member and the second compression member respectively, and the first compression member is capable of moving toward the second compression member;

[0009] Wherein, the first compression member and the second compression member are used to support the sample to be compressed.

[0010] Optionally, the first protrusion structure is an annular protrusion, and the first protrusion structure is distributed around the connecting member;

[0011] And / or, the second protrusion structure is an annular protrusion, and the second protrusion structure is distributed around the connecting member.

[0012] Optionally, the first protrusion structure is tapered on a side facing the second compression member;

[0013] And / or, the second protrusion structure has a tapered shape on a side facing the first compression member.

[0014] Optionally, the compression device further comprises a third compression member, the third compression member is located between the first compression member and the second compression member, the third compression member has a third convex structure on a side facing the first compression member, and / or the third compression member has a fourth convex structure on a side facing the second compression member;

[0015] The connecting member is also connected to the third compression member, and the third compression member is capable of moving toward the first compression member and the second compression member;

[0016] The space between the first compression member and the third compression member, and the space between the second compression member and the third compression member are used to carry the sample to be compressed.

[0017] Optionally, the first compression member has a first through hole, and the second compression member has a second through hole matching the first through hole;

[0018] The connecting member includes a support plate, a screw and a nut. One end of the screw is fixed to the support plate, and the other end of the screw passes through the first through hole and the second through hole in sequence and is connected to the nut.

[0019] Optionally, the compression device further includes: a limiter, wherein two opposite sides of the limiter arranged in the axial direction of the support plate are respectively in contact with the first compression member and the second compression member.

[0020] Optionally, one of the first compression member and the second compression member has a mounting groove, and one end of the limiter is located in the mounting groove.

[0021] Optionally, the first compression member has a first positioning hole, and the second compression member has a second positioning hole that matches the first positioning hole;

[0022] The compression device also includes a positioning structure, one end of which is located in the first positioning hole after passing through the second positioning hole, and the other end of the positioning structure is located outside the second positioning hole, and the other end of the positioning structure abuts against the side of the second compression member away from the first compression member.

[0023] Optionally, the compression device further comprises a power supply component;

[0024] The first compression member and the second compression member are conductive compression members, and the power supply assembly is electrically connected to the first compression member and the second compression member respectively.

[0025] Optionally, the compression device further includes a temperature sensor, which is located between the first compression member and the second compression member and connected to at least one of the first compression member and the second compression member, and the temperature sensor is in contact with the sample to be compressed.

[0026] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0027] By providing a connecting member connected to the first compression member and the second compression member, respectively, so that the first compression member can move toward the second compression member, the sample placed between the first and second compression members can be compressed. The present application also provides a raised structure in at least one of the first and second compression members. This avoids the excessively large compression surface in the related art, achieving compression of a localized area of ​​the sample, thereby more closely resembling the compression state of the sample under actual working conditions, thereby improving the accuracy of measuring the compression permanent set performance of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 This is a schematic top view of a compression device provided in an embodiment of the present application;

[0030] Figure 2 yes Figure 1 A schematic cross-sectional view of a compression device is provided;

[0031] Figure 3 yes Figure 1 Another cross-sectional schematic diagram of the compression device provided;

[0032] Figure 4 yes Figure 1 Another cross-sectional schematic diagram of the compression device provided;

[0033] Figure 5 is a structural schematic diagram of another compression device provided in an embodiment of the present application;

[0034] Figure 6 is a schematic top view of another compression device provided in an embodiment of the present application;

[0035] Figure 7 yes Figure 6 A schematic cross-sectional view of a compression device is provided;

[0036] Figure 8 yes Figure 6 Another cross-sectional schematic diagram of the compression device provided;

[0037] Figure 9 It is a structural schematic diagram of another compression device provided in an embodiment of the present application.

[0038] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0040] The present invention provides a compression device for testing the compression set performance of a sample. The compression set testing process involves compressing the sample for the same period of time at high temperature. Comparing the compression set (rebound height) of the sample after prolonged compression is used to evaluate whether the material meets the requirements for long-term sealing.

[0041] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a top view of a compression device provided in an embodiment of the present application. Figure 2 yes Figure 1 A cross-sectional structural diagram of a compression device provided ( Figure 2 Can be Figure 1 A schematic diagram of the cross-sectional structure of the compression device provided at A1-A1) The compression device 10 includes: a first compression component 11, a second compression component 12 and a connecting component 13.

[0042] The first compression member 11 and the second compression member 12 are arranged opposite each other. The first compression member 11 has a first protruding structure 111 on the side facing the second compression member 12, and / or the second compression member 12 has a second protruding structure 121 on the side facing the first compression member 11. Here, the first compression member 11 and the second compression member 12 are used to apply pressure to the sample to be compressed. The first protruding structure 111 and the second protruding structure 121 can contact the sample to be compressed to compress a local area of ​​the sample to be compressed. One of the first compression member 11 and the second compression member 12 is a lower compression member, and the other of the first compression member 11 and the second compression member 12 is an upper compression member.

[0043] In addition to the first protruding structure 111, the first compression member 11 also includes a first pressing plate 112. The first protruding structure 111 is connected to the side of the first pressing plate 112 that is close to the second compression member 12. For example, the first protruding structure 111 and the first pressing plate 112 can be fixedly connected, that is, the first protruding structure 111 and the first pressing plate 112 can be an integral structure. The first protruding structure 111 and the first pressing plate 112 can also be detachably connected, and this embodiment of the application is not limited to this. Similarly, in addition to the second protruding structure 121, the second compression member 12 also includes a second pressing plate 122. The second protruding structure 121 is connected to the side of the second pressing plate 122 that is close to the first compression member 11.

[0044] The connecting member 13 is connected to the first compression member 11 and the second compression member 12 respectively, and the first compression member 11 can move toward each other relative to the second compression member 12. Here, the connecting member 13 is used to move the first compression member 11 and the second compression member 12 toward each other, so that pressure can be applied to the sample to be compressed. Figure 1 and Figure 2 The specific structure of the connecting member 13 is not shown. For example, in order to achieve the relative movement of the first compression member 11 and the second compression member 12, the connecting member 13 may include a screw and a nut. In addition, the connecting member 13 may also include a telescopic rod, which is not limited in this embodiment of the present application.

[0045] Among them, the first compression member 11 and the second compression member 12 are used to carry the sample to be compressed. Here, the sample to be compressed can be a sample made of various materials that need to be tested for compression permanent deformation performance. For example, the sample to be compressed can be a sealing ring. In the cylindrical battery cell, the sealing ring is in contact with the cap and the steel shell respectively. The sealing of the cap and the steel shell after assembly can be achieved by compressing the sealing ring. Therefore, in the process of the sealing ring being compressed, the stress on the sealing ring is not the sealing ring as a whole, but the local area of ​​the sealing ring. The first protruding structure 111 and the second protruding structure 121 can simulate the local stress situation, thereby improving the accuracy of testing the compression permanent deformation performance, and also facilitating the selection of the sealing material used for the sealing ring.

[0046] It should be noted that the first protruding structure 111 and the second protruding structure 121 in the compression device 10 include the following three situations:

[0047] For the first case, please refer to Figure 2 The first compression member 11 has a first protruding structure 111 on a side facing the second compression member 12 .

[0048] For the second case, please refer to Figure 3 , Figure 3 yes Figure 1 Another cross-sectional structural diagram of the compression device provided ( Figure 3 Can be Figure 1 A schematic cross-sectional view of the compression device at A1-A1 is provided. The first compression member 11 has a first protruding structure 111 on a side facing the second compression member 12.

[0049] For the third case, please refer to Figure 4 , Figure 4 yes Figure 1 Another cross-sectional structural diagram of the compression device provided ( Figure 4 Can be Figure 1 A schematic diagram of the cross-sectional structure of the provided compression device at A1-A1) shows that the first compression member 11 has a first protruding structure 111 on the side facing the second compression member 12, and the second compression member 12 has a second protruding structure 121 on the side facing the first compression member 11. Figure 4 The first protruding structure 111 and the second protruding structure 121 shown may be disposed opposite to each other to facilitate compression of the sample.

[0050] Compared to the related art method of using upper and lower pressing plates to compress the sample, the above three methods can all achieve a localized compression effect on the sample. The third method can also avoid stress dispersion on the upper or lower surface of the sample to be compressed, thereby ensuring that the stress conditions of the sample to be compressed are close to the actual working conditions.

[0051] In summary, embodiments of the present application provide a compression device. A connecting member is provided to connect to a first compression member and a second compression member, respectively, so that the first compression member can move toward the second compression member, thereby compressing a sample placed between the first and second compression members. Furthermore, by providing at least one of the first and second compression members with a raised structure, the present application avoids the problem of an excessively large compression surface in related technologies, achieving compression of a localized area of ​​the sample. This allows for a more accurate representation of the sample's compression under actual working conditions, thereby improving the accuracy of measuring the sample's compression set performance.

[0052] The first convex structure and the second convex structure are described below:

[0053] Please refer to Figure 2 、 Figure 3 and Figure 4 The first protrusion structure 111 is an annular protrusion, and the first protrusion structure 111 is distributed around the connecting member 13. And / or, the second protrusion structure 121 is an annular protrusion, and the second protrusion structure 121 is distributed around the connecting member 13.

[0054] The annular protrusion can make the stress-bearing area of ​​the sample to be compressed also annular. For example, if the sample to be compressed is a sealing ring, the annular stress-bearing area can be close to the actual working condition of the sealing ring, thereby improving the accuracy of the compression permanent deformation performance test of the sealing ring. In the present application, the shapes of the first protrusion structure 111 and the second protrusion structure 121 can be set accordingly according to the shape of the sample to be compressed. For example, the sample to be compressed can be the sealing ring of a cylindrical battery cell, and accordingly, the first protrusion structure 111 and the second protrusion structure 121 can also be annular.

[0055] In addition, by arranging the first protruding structure 111 and the second protruding structure 121 to be distributed around the connecting member 13, it can be ensured that the stress applied by the first compression member 11 and the second compression member 12 under long-term compression is relatively balanced, thereby also improving the accuracy of the compression permanent deformation performance test. Figure 2 The arrangement of the first and second protruding structures 111, 112 is shown for exemplary purposes only, but the present invention is not limited thereto. For example, the compression device may include multiple sets of first and second protruding structures 111, 112 positioned opposite each other. The multiple sets of first and second protruding structures 111, 112 may be symmetrically distributed along the centerline of the connector 13. This can also achieve more balanced stress and enable testing of multiple samples to be compressed.

[0056] Optionally, the first protruding structure 111 is tapered on the side facing the second compression member 12. And / or, the second protruding structure 121 is tapered on the side facing the first compression member 11. That is, the end of the first protruding structure 111 and / or the second protruding structure 112 that contacts the sample to be compressed is tapered, thereby ensuring that a local area of ​​the sample is compressed. This can also make the area of ​​the side where the first protruding structure 111 is connected to the first pressing plate 112 larger, and / or the area of ​​the side where the second protruding structure 121 is connected to the second pressing plate 122 larger, thereby improving the structural stability of the compression device.

[0057] This application can also set up multiple layers of compression parts, and can also realize the testing of multiple samples to be compressed. Figure 5 , Figure 5 This is a structural schematic diagram of another compression device provided in an embodiment of the present application. The compression device also includes a third compression member 14, which is located between the first compression member 11 and the second compression member 12. The third compression member 14 has a third protruding structure 141 on the side facing the first compression member 11, and / or the third compression member 14 has a fourth protruding structure 142 on the side facing the second compression member 12. Figure 5 The example shown here is a case where the third protrusion structure 141 and the fourth protrusion structure 142 are included. The other two cases can be referred to as Figure 2 and Figure 3 , the embodiments of the present application are not described in detail here.

[0058] The connecting member 13 is also connected to the third compression member 14 , and the third compression member 14 is movable relative to the first compression member 11 and relative to the second compression member 12 .

[0059] The space between the first compression member 11 and the third compression member 14 , and the space between the second compression member 12 and the third compression member 14 are used to carry the sample to be compressed.

[0060] in addition, Figure 5 The compression device shown includes only one third compression member 14 . In addition, the compression device may also include multiple third compression members 14 , thereby enabling testing of more samples to be compressed at the same time.

[0061] The present application embodiment can compress the sample in various ways. The following is an exemplary embodiment:

[0062] An exemplary connector is shown in FIG. Figure 6 and Figure 7 , Figure 6 This is a schematic top view of another compression device provided in an embodiment of the present application. Figure 7 yes Figure 6 A cross-sectional structural diagram of a compression device provided ( Figure 7 Can be Figure 6 A schematic cross-sectional view of the compression device at A2-A2 is provided. The first compression member 11 has a first through-hole K1, and the second compression member 12 has a second through-hole K2 that mates with the first through-hole K1. The first through-hole K1 and the second through-hole K2 are arranged opposite each other to facilitate passage of the connector 13. For example, the first through-hole K1 and the second through-hole K2 can be located in the center regions of the first and second pressure plates 112 and 122, respectively.

[0063] The connecting member 13 includes a support plate 131, a screw 132, and a nut 133. One end of the screw 132 is fixed to the support plate 131, and the other end of the screw 132 passes through the first through hole K1 and the second through hole K2 in sequence and is connected to the nut 133. Among them, the first compression member 11 can be a lower compression member, and the second compression member 12 can be an upper compression member. The support plate 131 can be used to support the first compression member 11. The screw 132 can be used for guidance to enable the first compression member 11 and the second compression member 12 to move along the extension direction of the screw 132. The nut 133 can cooperate with the screw 132. By rotating the nut 133, the second compression member 12 can be moved toward the first compression member 11, thereby compressing the sample to be compressed.

[0064] in addition, Figure 4The illustrated compression device includes one connector 13 located in the center of the device to enhance its structural stability. However, the present embodiment does not limit the number of connectors 13. For example, the compression device may include four connectors 13. The top view of the first and second pressure plates 112 and 122 may be rectangular, and the four connectors 13 may be located at the four corners of the first pressure plate 112.

[0065] In this application, the compression device also includes a restrictor. Figure 6 and Figure 7 The limiters 15 are arranged on opposite sides of the support plate 131 in the axial direction, respectively contacting the first compression member 11 and the second compression member 12. The limiters 15 are used to cooperate with the connecting member 13. When the second compression member 12 moves toward the first compression member 11 by rotating the nut 133, the limiters 15 can limit the distance between the first compression member 11 and the second compression member 12, thereby compressing the sample to a specified height. The height of the limiter 15 can be determined by the compression ratio required for the test of the sample to be compressed. Figure 7 The limiter 15 shown is cylindrical, but the limiter 15 provided in the embodiment of the present application can also be in other shapes. For example, the limiter 15 can be horseshoe-shaped or ring-shaped.

[0066] in addition, Figure 7 The illustrated compression device includes two limiters 15 , which can be symmetrically distributed along the center line of the connector 13 to enhance structural stability during compression. However, the embodiment of the present application does not impose any limitation on the number of limiters 15 .

[0067] Optionally, one of the first compression member 11 and the second compression member 12 has a mounting groove 113, and one end of the limiter 15 is located in the mounting groove 113. Exemplarily, the first compression member 11 has the mounting groove 113, and the mounting groove 113 can prevent the limiter 15 from moving during the compression process, thereby reducing the test error.

[0068] In this application, the compression device also includes a positioning structure. Figure 6 and Figure 8 , Figure 8 yes Figure 6 Another cross-sectional structural diagram of the compression device provided ( Figure 8 Can be Figure 6 A schematic cross-sectional view of the compression device at A3-A3 is provided. The first compression member 11 has a first positioning hole K3, and the second compression member 12 has a second positioning hole K4 that matches the first positioning hole K3. The first positioning hole K3 and the second positioning hole K4 can be arranged relative to each other to facilitate insertion of the positioning structure 16.

[0069] The compression device also includes a positioning structure 16. One end of the positioning structure 16 passes through the second positioning hole K4 and is located within the first positioning hole K3. The other end of the positioning structure 16 is located outside the second positioning hole K4. The other end of the positioning structure 16 abuts against the side of the second compression member 12 facing away from the first compression member 11. The positioning structure 16 can be used to limit the movement of the first and second compression members 11, 12. During the long-term compression of the sample, the positioning structure 16 can effectively prevent errors caused by the movement of the first and second compression members 11, 12.

[0070] For example, Figure 8 The compression device shown includes two positioning structures 16. The two positioning structures 16 can also be symmetrically distributed along the center line of the connecting member 13 to improve the structural stability during compression, but the embodiment of the present application does not limit the number of positioning structures 16.

[0071] This application embodiment also provides another compression device, please refer to Figure 9 , Figure 9 Schematic diagram of the structure of another compression device provided in an embodiment of the present application. The compression device 10 also includes a power supply assembly 17. The first compression member 11 and the second compression member 12 are conductive compression members, and the power supply assembly 17 is electrically connected to the first compression member 11 and the second compression member 12, respectively. Since the first compression member 11 and the second compression member 12 are conductive compression members, the power supply assembly 17 can generate heat when energized, thereby achieving a heating function for the sample to be compressed. Since the compression permanent set performance needs to be tested under high temperature conditions, this can avoid the need for a separate heating device.

[0072] Optionally, the compression device further includes a temperature sensor 18, which is located between the first compression member 11 and the second compression member 12 and is connected to at least one of the first compression member 11 and the second compression member 12. The temperature sensor 18 is in contact with the sample to be compressed. The temperature sensor 18 can be used to measure the temperature of the sample to be compressed, thereby indicating whether the temperature of the sample to be compressed has reached the target temperature required for the test.

[0073] Figure 9 The specific structure of the temperature sensor 18 is not shown, but the present embodiment does not limit this. For example, the temperature sensor 18 can be a temperature sensing wire, and the contact between the test probe of the temperature sensing wire and the sample to be compressed can measure the temperature of the sample to be compressed.

[0074] In summary, embodiments of the present application provide a compression device. A connecting member is provided to connect to a first compression member and a second compression member, respectively, so that the first compression member can move toward the second compression member, thereby compressing a sample placed between the first and second compression members. Furthermore, by providing at least one of the first and second compression members with a raised structure, the present application avoids the problem of an excessively large compression surface in related technologies, achieving compression of a localized area of ​​the sample. This allows for a more accurate representation of the sample's compression under actual working conditions, thereby improving the accuracy of measuring the sample's compression set performance.

[0075] In this application, the term "and / or" simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0076] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0077] In this application, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise expressly limited.

[0078] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A compression device, characterized in that: include: A first compression member (11), a second compression member (12) and a connecting member (13); The first compression member (11) and the second compression member (12) are arranged opposite to each other, the first compression member (11) has a first convex structure (111) on a side facing the second compression member (12), and / or the second compression member (12) has a second convex structure (121) on a side facing the first compression member (11); The connecting member (13) is connected to the first compression member (11) and the second compression member (12) respectively, and the first compression member (11) is capable of moving toward the second compression member (12); The first compression member (11) and the second compression member (12) are used to carry the sample to be compressed.

2. The compression device according to claim 1, characterized in that The first protrusion structure (111) is an annular protrusion, and the first protrusion structure (111) is distributed around the connecting member (13); And / or, the second protruding structure (121) is an annular protrusion, and the second protruding structure (121) is distributed around the connecting member (13).

3. The compression device according to claim 1, characterized in that The first protruding structure (111) is tapered on a side facing the second compression member (12); And / or, the second protruding structure (121) is tapered on the side facing the first compression member (11).

4. The compression device according to claim 1, characterized in that The compression device further comprises a third compression member (14), the third compression member (14) being located between the first compression member (11) and the second compression member (12), the third compression member (14) having a third convex structure (141) on a side facing the first compression member (11), and / or the third compression member (14) having a fourth convex structure (142) on a side facing the second compression member (12); The connecting member (13) is also connected to the third compression member (14), and the third compression member (14) is capable of moving toward the first compression member (11) and the second compression member (12). The space between the first compression member (11) and the third compression member (14), and the space between the second compression member (12) and the third compression member (14) are used to carry the sample to be compressed.

5. The compression device according to any one of claims 1 to 4, characterized in that: The first compression member (11) has a first through hole (K1), and the second compression member (12) has a second through hole (K2) that matches the first through hole (K1); The connecting member (13) comprises a support plate (131), a screw rod (132) and a nut (133); one end of the screw rod (132) is fixed to the support plate (131); the other end of the screw rod (132) passes through the first through hole (K1) and the second through hole (K2) in sequence and is connected to the nut (133).

6. The compression device according to claim 5, characterized in that The compression device further comprises a limiter (15), wherein the limiter (15) is respectively in contact with the first compression member (11) and the second compression member (12) on two opposite sides of the support plate (131) in the axial direction.

7. The compression device according to claim 6, characterized in that One of the first compression member (11) and the second compression member (12) has a mounting groove (113), and one end of the limiter (15) is located in the mounting groove (113).

8. The compression device according to claim 5, characterized in that The first compression member (11) has a first positioning hole (K3), and the second compression member (12) has a second positioning hole (K4) that matches the first positioning hole (K3); The compression device further comprises a positioning structure (16), one end of the positioning structure (16) passing through the second positioning hole (K4) and being located in the first positioning hole (K3), the other end of the positioning structure (16) being located outside the second positioning hole (K4), and the other end of the positioning structure (16) being in contact with a side of the second compression member (12) facing away from the first compression member (11).

9. The compression device according to any one of claims 1 to 4, characterized in that: The compression device also includes a power supply component (17); The first compression member (11) and the second compression member (12) are conductive compression members, and the power supply component (17) is electrically connected to the first compression member (11) and the second compression member (12) respectively.

10. The compression device according to claim 9, characterized in that The compression device further comprises a temperature sensor (18), which is located between the first compression member (11) and the second compression member (12) and is connected to at least one of the first compression member (11) and the second compression member (12), and the temperature sensor (18) is in contact with the sample to be compressed.

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