Sample transfer testing device

Abstract

The utility model discloses a sample transfer testing device which comprises a main shell and a one-way valve arranged on the main shell, a placing area for containing a battery sample is arranged in the main shell, an opening is formed in the position, corresponding to the placing area, of the main shell and used for scanning and observing the battery sample, a sliding shell capable of sliding relative to the main shell is nested in the main shell, and the one-way valve is arranged on the sliding shell. A closed space aiming at the placing area is formed through close contact of the sliding shell and the main shell, the closed space communicates with the outside of the device through a one-way valve, and a heating electrode assembly is arranged in the main shell; a pressure applying mechanism is further arranged in the main shell and can apply pressure to the battery sample through the heating electrode assembly. According to the utility model, the storage and transfer of a battery sample in the storage box can be ensured under the condition that the battery sample is basically not influenced by air, the functions of heating, pressurizing, charging and discharging are provided, a scanning electron microscope device can conveniently observe the charging and discharging process of a solid-state battery and the structure change condition under variable temperature and variable voltage, and the storage box is suitable for wide popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of battery research and development equipment, in particular to a sample transfer testing device. Background Art

[0002] Scanning electron microscopy is one of the tools and means for observing and studying the microstructure of metal materials. Scanning electron microscopy can realize in-situ, real-time and dynamic observation of the morphology of the battery during charging and discharging, and obtain a variety of information such as scanning images, electrochemical properties and element distribution. Especially in observing the structural changes such as interface dendrite growth during the charging and discharging process of solid-state batteries under variable temperature and pressure, it is of great help to the research of solid-state batteries. Therefore, it is very important to design a sample stage suitable for scanning electron microscopy, with charging and discharging, heating and pressurization functions, and capable of vacuum transfer of experimental samples. At present, no related equipment has appeared. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a sample transfer test device capable of realizing vacuum transfer of experimental samples.

[0004] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a sample transfer test device, including a main shell and a one-way valve arranged on the main shell, a placement area for accommodating battery samples is arranged inside the main shell, and an opening is arranged at the main shell corresponding to the placement area for scanning and observing the battery samples, the main shell is nested with a sliding shell that can slide with the main shell, and a closed space for the placement area is formed through the close contact between the sliding shell and the main shell, and the closed space is connected to the outside of the device through the one-way valve to ensure that the closed space maintains a vacuum negative pressure, a heating electrode assembly is arranged inside the main shell, and the heating electrode assembly is used for contact heating of the battery sample; a pressure mechanism is also arranged in the main shell, and the pressure mechanism can pressurize the battery sample through the heating electrode assembly.

[0005] The working principle of this technical solution is to set a heating electrode assembly in the main shell, and the heating electrode assembly has the following functions: first, the heating electrode assembly heats the battery sample placed in the gap, so as to realize the variable temperature test of the battery; second, the heating electrode assembly can also pressurize the battery sample in the middle, so as to realize the pressurization function test of the battery. In addition, through the sliding cooperation between the sliding shell and the main shell, a closed space can be formed inside the sliding shell and the main shell. The vacuum pump arranged on one side of the main shell is connected to the one-way valve through a pipeline to form a vacuum environment in the main shell. In this way, the battery sample can be ensured to be in a vacuum environment, so as to realize the vacuum preservation of the battery sample, and the entire sample stage can also be moved over a long distance. Assemble the battery to be tested in a specific environmental atmosphere, such as in a glove box, and place the battery to be tested in the sample stage placement area. When the main shell is not evacuated by a vacuum pump, the sliding shell and the main shell need to be sealed by hand bolts. After the negative pressure is evacuated, such as vacuum, the specific vacuum value is preset according to the actual situation. The air pressure in the main shell is lower than the external air pressure. Even if there is no hand bolt for fixing, the sliding shell can form a sealed structure with the main shell stably. When testing is required, the entire sample stage is in the scanning electron microscope equipment (the hand screws need to be loosened), and the inside of the scanning electron microscope will be evacuated. When the ambient air pressure inside the scanning electron microscope is lower than the air pressure inside the main shell, the air pressure inside the main shell will push the sliding shell to move outward, exposing the battery sample inside the main shell, so that the scanning electron microscope can perform charge and discharge tests on the battery sample under preset pressure and heating temperature conditions. In this way, the battery sample is always in an environment with relatively low air pressure, avoiding the influence of air on the battery sample, and completing the pressurized heating charge and discharge test observation.

[0006] In order to better realize the utility model, further, both ends of the sliding housing are connected to the main housing through hand-tightening bolts; a spring is also embedded on the hand-tightening bolt, and the spring is located between the main housing and the sliding housing.

[0007] In order to better realize the utility model, further, the pressure mechanism in the main shell includes a pressure sensor abutting the heating electrode assembly, a pressure piston abutting the pressure sensor, the pressure piston is threadedly connected with a locking screw, and the locking screw is placed at the rear end of the outside of the main shell and threadedly connected to the rear end of the main shell.

[0008] In order to better realize the utility model, further, two heating electrode assemblies are arranged inside the main shell, an insulating plate is arranged at the lower part of the two heating electrode assemblies, and there is a gap between the two heating electrode assemblies for placing the battery sample.

[0009] In order to better realize the utility model, further, the side walls at the junction of the front end of the main shell and the sliding shell are provided with guide rails, and the sliding shell is provided with sliding grooves matching the guide rails on both sides, and the sliding grooves of the sliding shell cooperate with the guide rails at the front end of the main shell to realize the relative sliding of the sliding shell and the main shell.

[0010] In order to better realize the utility model, further, a panel is provided at the rear of the main shell, a mounting groove is provided in the middle of the panel, a through hole is provided in the middle of the mounting groove, a sealing plate detachably connected thereto is provided in the mounting groove, and the sealing plate closes the through hole in the middle of the mounting groove.

[0011] In order to better implement the utility model, further, it also includes a mounting plate, and the main shell is fixed on the mounting plate by fastening screws.

[0012] In order to better realize the utility model, further, a wiring harness for extending all the internal energized wires is provided on one side of the main shell.

[0013] In order to better realize the utility model, further, the heating electrode assembly includes a metal block, a temperature sensor and a heat source are installed inside the metal block, the temperature sensor and the heat source extend from the side of the metal block, a boss is provided at the head of the metal block, an insulating ring extending from the metal block is installed in the tail of the metal block, and a metal ring is installed in the insulating ring; the electrodes of the battery sample are clamped by the bosses at the heads of the metal blocks in the two heating electrode assemblies, the metal ring of one heating electrode assembly abuts against the pressure mechanism, and the metal ring of the other heating electrode assembly abuts against the inner wall of the main shell; the heat source is insulated from the metal block, and the power-carrying wire of the heat source extends out of the main shell through a wiring harness and is connected to an external power supply device; a wiring terminal for powering the metal block is also provided on one side of the metal block, and the wiring terminal is provided with a power-carrying wire, and the power-carrying wire extends out of the main shell through a wiring harness and is connected to an external power supply device, and the battery sample is charged and discharged through the metal block.

[0014] In order to better realize the utility model, further, one end of the wiring harness is fixed to the side wall of the main shell through a fixing ring, and the other end is provided with a connector.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0016] (1) The utility model provides a sample stage for placing battery samples, which can ensure that the battery samples placed inside the sample stage can be stored and transferred without being affected by air, especially under specific atmosphere or air pressure conditions, such as scanning electron microscope observation in a vacuum environment;

[0017] (2) The sample stage provided by the utility model can provide the battery sample inside with heating, pressurization, charging and discharging functions. These functions can be realized even during the scanning electron microscopy process, which is of great help in observing the solid-state battery charging and discharging process and the structural changes such as interface dendrite growth under variable temperature and pressure;

[0018] (3) The utility model has a reasonable structure, complete functions, and is easy to operate. It is of great help to the research and development of solid-state batteries. It can cooperate well with scanning electron microscope equipment to observe battery samples. It has positive progressive significance for the research and development of solid-state batteries and is suitable for wide promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the heating electrode assembly in the utility model;

[0023] Figure 4 It is a cross-sectional view of the heating electrode assembly in the utility model;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the main housing in the utility model;

[0025] Figure 6 It is a three-dimensional structural schematic diagram of the sliding housing in the utility model;

[0026] Figure 7 It is a schematic diagram of the closed state of the utility model;

[0027] Figure 8 It is a schematic diagram of the open state of the utility model.

[0028] Among them: 1—mounting plate, 2—main shell, 21—guide rail, 22—panel, 23—mounting groove, 24—through hole, 25—sealing plate, 3—sliding shell, 31—slide groove, 4—hand-tightening bolt, 5—insulating plate, 6—heating electrode assembly, 61—metal block, 62—temperature sensor, 63—heat source, 64—boss, 65—insulating ring, 66—metal ring, 67—terminal, 7—battery sample, 8—wiring harness, 81—connector, 82—fixing ring, 9—check valve, 10—spring, 11—pressure sensor, 12—pressure piston, 13—locking screw. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiment 1:

[0033] The main structure of this embodiment is as follows: Figure 1 , Figure 2 As shown, it includes a main shell 2 and a one-way valve 9 arranged on the main shell 2, a placement area for accommodating a battery sample 7 is arranged inside the main shell 2, and an opening is arranged at the main shell 2 corresponding to the placement area for scanning and observing the battery sample 7, the main shell 2 is nested with a sliding shell 3 that can slide with the main shell 2, and a closed space for the placement area is formed through the close contact between the sliding shell 3 and the main shell 2, and the closed space is connected to the outside of the device through the one-way valve 9 to ensure that the closed space maintains a vacuum negative pressure, and a heating electrode assembly 6 is arranged inside the main shell 2, and the heating electrode assembly 6 is used for contact heating of the battery sample 7; a pressure mechanism is also arranged in the main shell 2, and the pressure mechanism can pressurize the battery sample 7 through the heating electrode assembly 6.

[0034] The specific implementation includes the following steps:

[0035] S1: Load the battery sample 7 into the sample stage: slide the sliding housing 3 toward the outside of the main housing 2, and expose the gap between the heating electrode assemblies 6 where the battery sample 7 is placed. Place the battery sample 7 in the gap between the heating electrode assemblies 6, and adjust the pressure mechanism so that the two heating electrode assemblies 6 press the battery sample 7 in the gap. At this time, the sample stage is in an open state, as shown in FIG. Figure 8 As shown;

[0036] S2 Close the sample stage: slide the sliding housing 3 toward the main housing 2 to form a closed space in the main housing 2, start the external vacuum pump, and use the one-way valve 9 on the side of the main housing 2 to evacuate the main housing 2. At this time, the sample stage is in a closed state. Figure 7 As shown, after the main housing 2 is in a negative pressure state, due to the presence of the one-way valve 9, the gas cannot enter the main housing 2 from the outside, and the external vacuum pump is removed;

[0037] S3 transfers the battery sample to the scanning electron microscope equipment for charge and discharge observation under pressurized and heated conditions: the entire sample stage with a negative pressure inside is placed inside the scanning electron microscope equipment, and the heating electrode assembly 6 can perform the heating operation normally. Since the main shell 2 is still in a negative pressure state at this time, the main shell 2 and the sliding shell 3 are still in a closed state; the inside of the scanning electron microscope also needs to be evacuated. After starting the scanning electron microscope equipment, the space where the sample stage is located is evacuated. When the external air pressure is lower than the internal air pressure of the main shell 2, the sliding shell 3 will slide to the outside under the push of the internal air pressure of the main shell 2, exposing the internal battery sample 7 to the lens of the scanning electron microscope.

[0038] Embodiment 2:

[0039] Based on the above embodiment, this embodiment further defines the connection method between the sliding housing 3 and the main housing 2, such as Figure 1 , Figure 7 , Figure 8As shown, both ends of the sliding housing 3 are connected to the main housing 2 by hand-tightening bolts 4; a spring 10 is also embedded in the hand-tightening bolt 4, and the spring 10 is located between the main housing 2 and the sliding housing 3. Loosen the hand-tightening bolt 4, and the spring 10 is also embedded in the hand-tightening bolt 4, and the spring 10 is located between the main housing 2 and the sliding housing 3. The spring 10 is arranged on the hand-tightening bolt 4, so that the process of pushing the sliding housing 3 to slide, which was originally driven by the internal and external pressure difference, can be completed by the spring 10. When the entire sample stage is in a closed state, the spring 10 is in a compressed state, and when the negative pressure in the main housing 2 is greater than the tension of the spring 10, the sliding housing 3 will not slide to the outside of the main housing 2 when the hand-tightening bolt 4 is loosened. When the entire sample stage is moved to the scanning electron microscope device, the inside of the scanning electron microscope device is vacuumed. At this time, due to the arrangement of the spring 10, it is not necessary to make the negative pressure inside the scanning electron microscope completely less than the negative pressure of the main housing 2, and the sliding housing 3 can slide to the outside of the main housing 2 under the elastic force of the spring 10. In addition, the setting of the spring 10 can limit the sliding position of the sliding housing 3 on the one hand, and can also ensure that the battery sample 7 covered by the sliding housing 3 can be fully exposed to the lens of the scanning electron microscope on the other hand. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0040] Embodiment 3:

[0041] Based on the above embodiments, this embodiment further defines the specific structure of the pressure mechanism, such as Figure 2 As shown, the pressure mechanism in the main shell 2 includes a pressure sensor 11 abutting against the heating electrode assembly 6, a pressure piston 12 abutting against the pressure sensor 11, and the pressure piston 12 is threadedly connected with a locking screw 13, which is placed at the rear end of the main shell 2 and threadedly connected to the rear end of the main shell 2. The setting of the pressure mechanism is mainly to enable the two heating electrode assemblies 6 to clamp the battery sample 7. By rotating the locking screw 13, the locking screw 13 squeezes the pressure piston 12, and further squeezes the pressure sensor 11. The pressure sensor 11 presses the heating electrode assembly 6 on one side of the main shell 2, and the heating electrode assembly 6 on the other side of the main shell 2 abuts against the main shell 2, thus realizing the process of tightening the battery sample 7. After the pressure sensor 11 is further added, the state of the battery sample 7 at a specific pressure can be observed, and the charge and discharge test can be performed on it, and the electron microscope observation can be performed. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0042] Embodiment 4:

[0043] Based on the above embodiment, this embodiment further defines the number and position relationship of the heating electrode assembly 6, such as Figure 2As shown, two heating electrode assemblies 6 are arranged inside the main housing 2, an insulating plate 5 is arranged below the two heating electrode assemblies 6, and there is a gap between the two heating electrode assemblies 6 for placing the battery sample 7. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0044] Embodiment 5:

[0045] Based on the above embodiment, this embodiment further defines the connection structure between the main housing 2 and the sliding housing 3, such as Figure 5 , Figure 6 As shown, the side walls where the front end of the main housing 2 and the sliding housing 3 meet are provided with guide rails 21, and the sliding housing 3 is provided with slide grooves 31 matching the guide rails 21 on both sides. The slide grooves 31 of the sliding housing 3 cooperate with the guide rails 21 at the front end of the main housing 2 to achieve relative sliding of the sliding housing 3 and the main housing 2. In order to limit the sliding range of the sliding housing 3 and ensure that it can slide stably, the guide rails 21 are particularly provided in the main housing 2, and the corresponding slide grooves are provided in the sliding housing 3. The other parts of this embodiment are the same as those of the above embodiment and will not be repeated.

[0046] Embodiment 6:

[0047] Based on the above embodiment, this embodiment further defines the structure of the main housing 2, such as Figure 1 , Figure 2 , Figure 5 , Figure 7 , Figure 8 As shown, a panel 22 is provided at the rear of the main shell 2, a mounting groove 23 is provided in the middle of the panel 22, a through hole 24 is provided in the middle of the mounting groove 23, a sealing plate 25 detachably connected thereto is provided in the mounting groove 23, and the sealing plate 25 closes the through hole 24 in the middle of the mounting groove 23. In order to facilitate the installation of the structure in the main shell 2 (such as the heating electrode assembly 6, the pressure mechanism, etc.), a through hole 24 is particularly provided in the middle of the panel 22 at the front of the main shell 2, which is closed by the sealing plate 25. When the internal structure of the main shell 2 needs to be inspected and maintained, the sealing plate 25 can be removed, and then the internal structure of the main shell 2 can be inspected and maintained. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0048] Embodiment 7:

[0049] Based on the above embodiment, this embodiment further adds a mounting plate 1, such as 1, Figure 2 , Figure 7 , Figure 8As shown, it also includes a mounting plate 1, and the main housing 2 is fixed on the mounting plate 1 by fastening screws. In order to ensure the flatness and stability of the entire sample stage, a mounting plate 1 is specially added. On the one hand, the main housing 2 is fixed on the mounting plate 1 by fastening screws, so as to achieve the stability of the entire sample stage. On the other hand, the mounting plate 1 makes it more convenient to fix the sample stage inside the scanning electron microscope device. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0050] Embodiment 8:

[0051] Based on the above embodiment, this embodiment further adds a wiring harness 8, such as Figure 1 , Figure 7 , Figure 8 As shown, a wiring harness 8 extending all the internal energized wires is provided on one side of the main housing 2. The wiring harness 8 extending out of the main housing 2 is connected to the external charging and discharging equipment to power the equipment in the main housing 2, so that each component can operate normally, including heating the battery sample 7 by the heating electrode assembly 6, and charging and discharging the battery sample 7, or applying pressure to the battery sample 7 by the heating electrode assembly 6, so as to observe the specific changes in the morphology of the battery material of the battery sample 7 during the charging and discharging process of the battery sample 7 under the conditions of pressurization, heating, etc. through a scanning electron microscope. The other parts of this embodiment are the same as those of the above embodiment and will not be repeated.

[0052] Embodiment 9:

[0053] Based on the above embodiment, this embodiment further defines the specific structure of the heating electrode assembly 6, such as Figure 3 , Figure 4 As shown, the heating electrode assembly 6 includes a metal block 61, a temperature sensor 62 and a heat source 63 are installed inside the metal block 61, and the temperature sensor 62 and the heat source 63 extend from the side of the metal block 61. The head of the metal block 61 is provided with a boss 64, and the tail of the metal block 61 is provided with an insulating ring 65 extending from the metal block 61, and the insulating ring 65 is provided with a metal ring 66; the electrodes of the battery sample 7 are clamped by the boss 64 of the head of the metal block 61 in the two heating electrode assemblies 6, and one of the heating electrode assemblies The metal ring 66 of the component 6 abuts against the pressure-applying mechanism, and the metal ring 66 of the other heating electrode component 6 abuts against the inner wall of the main shell 2; the heat source 63 and the metal block 61 are insulated, and the power-carrying wires of the heat source 63 extend out of the main shell 2 through the wiring harness 8 and are connected to the external power supply device; a terminal 67 for supplying power to the metal block 61 is also provided on one side of the metal block 61, and the terminal 67 is provided with a power-carrying wire, and the power-carrying wire extends out of the main shell 2 through the wiring harness 8 and is connected to the external power supply device, and the battery sample 7 is charged and discharged through the metal block 61.

[0054] The heating electrode assembly 6 has three main functions: first, clamping the battery sample 7 by the pressure applied by the pressure assembly; second, heating the metal block 61 by the internally arranged heat source 63, and then heating the battery sample 7 by the metal block 61; third, installing the power-carrying wire through the terminal 67 arranged on the side of the metal block, so that the metal block 61 can charge and discharge the battery sample 7. Among them, the heat source 63 also uses the power-carrying wire to connect with the external power supply equipment to power the heat source 63, so that it generates Joule heat to realize the heat supply to the metal block 61, but the metal block 61 and the heat source 63 are insulated, there is no electrical connection between the two, there is no interference with each other, and there is only heat transfer. The means of insulation setting are too existing, and the insulation setting can be achieved by means of setting a non-insulating insulating layer on the surface of the heat source, etc., which will not be elaborated here. The setting of the insulating ring 65 and the metal ring 66 has two functions. Since the metal ring 66 of one of the heating electrode assemblies 6 abuts against the pressure mechanism, the setting of the insulating ring 65 and the metal ring 66 on this side is to avoid the adverse effect caused by the conduction of the metal block 61 to the pressure mechanism through the insulating ring on the one hand, and on the other hand, the set metal ring 66 is strong enough to withstand the large pressure given by the pressure mechanism, avoiding the direct foundation of the pressure mechanism and the insulating ring 65 to avoid deformation of the insulating ring 65. The insulating ring 65 and the metal ring 66 abutting against the inner wall of the main shell 2 on the other side are to prevent the positive and negative currents of the metal block 61 from being transmitted to the main shell 2. The set temperature sensor 62 can detect the temperature of the metal block 61 in real time. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0055] Embodiment 10:

[0056] Based on the above embodiment, this embodiment further defines the structure of the wiring harness 8, such as Figure 1 , Figure 7 , Figure 8 As shown, one end of the wire harness 8 is fixed to the side wall of the main housing 2 by a fixing ring 82, and the other end is provided with a connector 81. The setting of the fixing ring 82 is to prevent air leakage when the wire harness 8 extends out of the outer housing 2, so that a closed environment can be formed in the main housing 2. The setting of the connector 81 is to facilitate connection with external devices. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0057] It is understandable that the working principles and working processes of the sample stage structure according to an embodiment of the utility model, such as the one-way valve 9 and the pressure sensor 11, are prior art and well known to those skilled in the art, and will not be described in detail here.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A sample transfer test device, characterized in that: The invention comprises a main shell (2) and a one-way valve (9) arranged on the main shell (2); a placement area for accommodating a battery sample (7) is arranged inside the main shell (2); an opening is arranged at the main shell (2) corresponding to the placement area for scanning and observing the battery sample (7); a sliding shell (3) capable of sliding with the main shell (2) is nested in the main shell (2); a closed space for the placement area is formed by close contact between the sliding shell (3) and the main shell (2); the closed space is connected to the outside of the device through the one-way valve (9) to ensure that the closed space can be maintained at a preset vacuum negative pressure; a heating electrode assembly (6) is arranged inside the main shell (2); the heating electrode assembly (6) is used for contact heating the battery sample (7); and a pressure mechanism is also arranged inside the main shell (2); the pressure mechanism can apply pressure to the battery sample (7) through the heating electrode assembly (6).

2. A sample transfer test device according to claim 1, characterized in that: The two ends of the sliding housing (3) are connected to the main housing (2) via hand-tightening bolts (4); a spring (10) is also embedded in the hand-tightening bolts (4), and the spring (10) is located between the main housing (2) and the sliding housing (3).

3. A sample transfer test device according to claim 1 or 2, characterized in that: The pressure-applying mechanism in the main shell (2) comprises a pressure sensor (11) abutting against the heating electrode assembly (6), and a pressure piston (12) abutting against the pressure sensor (11); the pressure piston (12) is threadedly connected with a locking screw (13); the locking screw (13) is disposed at the rear end of the outside of the main shell (2) and is threadedly connected to the rear end of the main shell (2).

4. A sample transfer test device according to claim 1 or 2, characterized in that: Two heating electrode assemblies (6) are arranged inside the main housing (2), an insulating plate (5) is arranged below the two heating electrode assemblies (6), and a gap for placing a battery sample (7) is provided between the two heating electrode assemblies (6).

5. A sample transfer test device according to claim 1 or 2, characterized in that: Guide rails (21) are arranged on the side walls of the junction between the front end of the main housing (2) and the sliding housing (3); sliding grooves (31) matching the guide rails (21) are arranged on both sides of the interior of the sliding housing (3); the sliding grooves (31) of the sliding housing (3) cooperate with the guide rails (21) at the front end of the main housing (2) to achieve relative sliding of the sliding housing (3) and the main housing (2).

6. A sample transfer test device according to claim 1 or 2, characterized in that: A panel (22) is provided at the rear of the main housing (2), a mounting groove (23) is provided in the middle of the panel (22), a through hole (24) is provided in the middle of the mounting groove (23), a sealing plate (25) detachably connected to the mounting groove (23) is provided in the mounting groove (23), and the sealing plate (25) seals the through hole (24) in the middle of the mounting groove (23).

7. A sample transfer test device according to claim 1 or 2, characterized in that: It also comprises a mounting plate (1), and the main housing (2) is fixed on the mounting plate (1) by means of fastening screws.

8. A sample transfer test device according to claim 1 or 2, characterized in that: A wiring harness (8) extending all the internal current-carrying wires is provided on one side of the main housing (2).

9. A sample transfer test device according to claim 8, characterized in that: The heating electrode assembly (6) comprises a metal block (61), a temperature sensor (62) and a heat source (63) are installed inside the metal block (61), the temperature sensor (62) and the heat source (63) extend from the side of the metal block (61), a boss (64) is provided at the head of the metal block (61), an insulating ring (65) extending from the metal block (61) is installed at the tail of the metal block (61), and a metal ring (66) is installed inside the insulating ring (65); the electrodes of the battery sample (7) are clamped by the bosses (64) at the heads of the metal blocks (61) in the two heating electrode assemblies (6), and one of the heating electrode assemblies The metal ring (66) of (6) abuts against the pressure-applying mechanism, and the metal ring (66) of another heating electrode assembly (6) abuts against the inner wall of the main shell (2); the heat source (63) and the metal block (61) are insulated, and the power-carrying wire of the heat source (63) extends out of the main shell (2) through the wiring harness (8) and is connected to an external power supply device; a terminal (67) for supplying power to the metal block (61) is also provided on one side of the metal block (61), and the terminal (67) is provided with a power-carrying wire, and the power-carrying wire extends out of the main shell (2) through the wiring harness (8) and is connected to an external power supply device, and the battery sample (7) is charged and discharged through the metal block (61).

10. The sample transfer test device according to claim 8, characterized in that: One end of the wiring harness (8) is fixed to the side wall of the main housing (2) via a fixing ring (82), and the other end is provided with a connector (81).

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