Electrochemical generating apparatus and instruments

Abstract

This invention discloses an electrochemical generating device, relating to the field of precision instrument technology, mainly comprising: a receiving cavity, a driving mechanism, and a sample clamping mechanism. The receiving cavity has an opening on at least one side, and a sealing element is provided at the opening to seal the cavity. The driving mechanism is connected to the sealing element and can drive the sealing assembly to move, thereby opening or sealing the receiving cavity. The sample clamping mechanism is disposed within the receiving cavity and can clamp a test sample. The sample clamping mechanism is electrically connected to an electrochemical testing circuit to perform electrochemical testing on the test sample. This invention also discloses an instrument including the aforementioned electrochemical generating device. This invention can maintain a sealed environment during sample transfer, avoiding problems such as oxidation and contamination caused by contact between the test sample and the external environment.

Description

Technical Field

[0001] This invention relates to the field of precision instrument technology, and in particular to an electrochemical generating device and instrument. Background Technology

[0002] Most existing electrochemical generators typically use the principle of pressure differential sealing for sealing. This involves placing the prepared battery sample inside the electrochemical generator and using an external pump to remove the gas inside, creating a vacuum. Under this vacuum, the pressure difference between the inside and outside of the electrochemical generator prevents it from opening due to atmospheric pressure, thus achieving a seal.

[0003] However, existing electrochemical generators cannot maintain a vacuum state when used under an electron microscope. During the transfer of test samples, they come into contact with the external atmospheric environment, resulting in oxidation, pollution, and other problems. Summary of the Invention

[0004] The purpose of this invention is to provide an electrochemical generating device and instrument to solve the problems existing in the prior art, which can keep the test sample sealed during the transfer process and avoid oxidation, pollution and other problems caused by the test sample coming into contact with the external environment.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides an electrochemical generating device, comprising:

[0007] A receiving cavity, wherein at least one side of the receiving cavity is provided with an opening, and a sealing element is provided at the opening, the sealing element being capable of sealing the receiving cavity;

[0008] A drive mechanism, connected to the seal, is capable of driving the sealing assembly to move, thereby opening or sealing the receiving cavity;

[0009] A sample clamping mechanism is provided, which is capable of clamping a test sample and can be electrically connected to an electrochemical test circuit to perform electrochemical testing on the test sample.

[0010] Preferably, the receiving cavity is further provided with a gas inlet, which can input atmospheric gas into the receiving cavity.

[0011] Preferably, the opening is provided at the top of the receiving cavity.

[0012] Preferably, the sealing element is a cavity sealing plate, and the driving mechanism is a linear driving mechanism, which can drive the cavity sealing plate to reciprocate along the opening to open or close the opening.

[0013] Preferably, the driving mechanism includes a drive motor, which is connected to a transmission screw and can drive the transmission screw to rotate. The cavity sealing plate is installed on the transmission screw by a nut. A first guide is provided on the side of the receiving cavity near the transmission screw, and the nut is slidably installed on the first guide.

[0014] Preferably, a sealing ring is provided at the sealing connection between the cavity sealing plate and the opening, and the cavity sealing plate is also connected to a pressing device. When the cavity sealing plate closes the opening, the pressing device can drive the cavity sealing plate to press the sealing ring to seal the receiving cavity.

[0015] Preferably, the pressing device includes a push-pull transmission plate, a guide connecting rod, and an elastic element. One end of the guide connecting rod is slidably mounted on a second guide element, and the other end passes through the push-pull transmission plate and the cavity sealing plate. The cavity sealing plate is provided with an inclined straight groove, which gradually moves away from the opening from back to front. When the opening is open, the guide connecting rod is located at the bottom end of the straight groove. The push-pull transmission plate is connected to the nut, and an elastic element is provided between the push-pull transmission plate and the rear end face of the cavity sealing plate. When the cavity sealing plate closes the opening, the drive motor drives the transmission screw to continue rotating, which can drive the push-pull transmission plate to compress the elastic element and drive the guide connecting rod to move along the straight groove, thereby driving the cavity sealing plate to press the sealing ring to seal the receiving cavity.

[0016] The front end of the cavity sealing plate is equipped with a third pulley via a pulley bracket. The front end of the receiving cavity is equipped with a guide sloping plate. The guide sloping plate is provided with a guide surface that can cooperate with the third pulley. The guide surface includes an inclined surface and an arc-shaped surface connected sequentially from top to bottom. The inclined surface is gradually positioned closer to the opening from back to front.

[0017] Preferably, the electrochemical generating device further includes a limiting component, which includes a first contact limiting switch and a second contact limiting switch. The second contact limiting switch and the first contact limiting switch are respectively disposed at the front end and the rear end of the receiving cavity. The second contact limiting switch and the transmission screw are located on the same side of the receiving cavity, and the first contact limiting switch and the second guide are located on the same side of the receiving cavity.

[0018] The push-pull transmission plate is also provided with a limit switch adjustment piece on the side near the transmission screw. The limit switch adjustment piece is arranged opposite to the second contact limit switch, and the distance between the limit switch adjustment piece and the second contact limit switch can be adjusted.

[0019] When the second contact limit switch contacts the limit switch adjusting plate, the receiving cavity is sealed; when the first contact limit switch contacts the guide connecting rod, the opening is fully opened.

[0020] Preferably, the sample clamping mechanism includes a sample clamping assembly, which includes a first clamp and a second clamp disposed opposite to each other, the first clamp and the second clamp being able to clamp the test sample together; wherein, a sample mounting plate is provided on the side of the second clamp near the first clamp, the test sample being able to be mounted on the side of the sample mounting plate near the first clamp and being able to contact the first clamp;

[0021] The first clamp and the second clamp are connected by clamp mounting screws, and insulating gaskets are provided between the first clamp and the second clamp and on the clamping surface of the clamp mounting screws;

[0022] The sample clamping mechanism further includes a mounting base, the sample clamping assembly is mounted on the mounting base, and the mounting base is mounted on the sealing base plate of the receiving cavity.

[0023] Preferably, the mounting base is further equipped with a heating component, which can heat the test sample held by the sample clamping component; and the mounting base is further equipped with a temperature measuring component, which can measure the heating temperature of the heating component.

[0024] The present invention also provides an instrument comprising the above-described electrochemical generating device.

[0025] The present invention achieves the following technical effects compared to the prior art:

[0026] The present invention has a sealing element at the opening of the receiving cavity, which can seal the receiving cavity. The sealing element is connected to the driving mechanism, which can drive the sealing assembly to move to open or seal the receiving cavity. During the transfer of test samples, the sealing assembly is driven by the driving mechanism to seal the receiving cavity, which can avoid the test samples from contacting the external environment and causing oxidation, contamination and other problems. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1This is a schematic diagram of the overall structure of the electrochemical generating device from one angle in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the overall structure of the electrochemical generating device from another angle in an embodiment of the present invention;

[0030] Figure 3 This is a front view of the electrochemical generating device in an embodiment of the present invention;

[0031] Figure 4 for Figure 3 AA section view;

[0032] Figure 5 This is a schematic diagram of the installation of the elastic spring in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the sample clamping assembly in an embodiment of the present invention;

[0034] Figure 7 This is a cross-sectional view of the sample clamping assembly in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the sample clamping mechanism in an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram illustrating the sealing principle of the sealing element in an embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the installation of the insulating gasket in an embodiment of the present invention.

[0038] In the diagram: 1. Receiving cavity; 2. Sealing base plate; 3. Vacuum sealing screw; 4. Drive motor; 5. Coupling; 6. Transmission gear; 7. Transmission screw; 8. Nut; 9. First support frame; 10. Second support frame; 11. Limit switch adjusting plate; 12. Push-pull transmission plate; 13. Cavity sealing plate; 14. Guide connecting rod; 15. Slotted slide rail plate; 16. Guide inclined groove plate; 17. Pulley bracket; 18. Spring fixing plate; 19. Elastic spring; 20. First pulley; 21. Second pulley; 22. Third pulley. 2. Fixed base 23, ceramic heating element 24, sample clamping assembly 25, temperature measuring thermocouple 26, battery sample 27, metal clamping spring 28, first contact limit switch 29, second contact limit switch 30, first clamp 31, second clamp 32, sample mounting plate 33, plate locking screw 34, clamp mounting screw 35, insulating gasket 36, heating element circuit 37, electrochemical test circuit 38, guide surface 39, straight groove 40, O-ring 41. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] The purpose of this invention is to provide an electrochemical generating device and instrument to solve the problems existing in the prior art, which can keep the test sample sealed during the transfer process and avoid oxidation, pollution and other problems caused by the test sample coming into contact with the external environment.

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example 1

[0043] like Figures 1-10 As shown, this embodiment provides an electrochemical generating device, mainly comprising: a receiving cavity 1, a driving mechanism, and a sample clamping mechanism. The receiving cavity 1 has an opening on at least one side, and a sealing element is provided at the opening to seal the receiving cavity 1. The driving mechanism is connected to the sealing element and can drive the sealing assembly to move, thereby opening or sealing the receiving cavity 1. The sample clamping mechanism can clamp a test sample and is electrically connected to an electrochemical testing circuit 38 to perform electrochemical testing on the test sample. The test sample is preferably a battery sample 27. The electrochemical test can be selected according to specific needs, such as cyclic voltammetry, linear scan, differential pulse voltammetry, square wave voltammetry, chronoamperometry, and AC impedance testing. It can perform in-situ charge-discharge tests on battery samples 27, such as solid-state batteries, power batteries, and lithium-ion batteries. In this embodiment, during the transfer of the test sample, the driving mechanism drives the sealing assembly to seal the receiving cavity 1, which can prevent the test sample from contacting the external environment and causing oxidation, contamination, and other problems.

[0044] Furthermore, the containment cavity 1 is also equipped with a gas inlet. When testing samples that require a special atmospheric environment, atmospheric gas can be introduced into the containment cavity 1 through the gas inlet to meet various testing needs. The input atmospheric gas can be selected according to specific working needs. For example, when conducting high temperature and high humidity tests on lithium batteries, air with a relative humidity of 90%-95% can be input into the containment cavity 1 through the gas inlet for testing, or electrochemical tests can be conducted under some inert atmospheres.

[0045] Specifically, in this embodiment, two threaded holes are also opened on the side of the receiving cavity 1 for fixing the vacuum sealing screw 3. A sealing ring is also installed between the threaded hole and the vacuum sealing screw 3 for sealing. When it is necessary to input atmospheric gas into the receiving cavity 1, the vacuum sealing screw 3 in the threaded hole is unscrewed so that the threaded hole can be used as a gas inlet to input atmospheric gas. When it is not necessary to input atmospheric gas into the receiving cavity 1, the vacuum sealing screw 3 is screwed into the threaded hole to seal the receiving cavity 1.

[0046] In this embodiment, the location and number of openings on the receiving cavity 1 can be set according to the specific work. For example, only one opening can be set on the top or side of the receiving cavity 1, or one opening can be set on the top and one opening on the side of the receiving cavity 1, for a total of two openings.

[0047] In a preferred embodiment, for ease of sealing, the opening is provided only at the top of the receiving cavity 1; specifically, as shown... Figure 1 , Figure 2 and Figure 9 As shown, the receiving cavity 1 includes a cavity sidewall that forms a closed annular structure. A sealing base plate 2 is sealed to the bottom of the cavity sidewall, and the opening is formed at the top of the cavity sidewall. A sealing element is disposed at the top of the receiving cavity 1 to seal the opening.

[0048] Furthermore, sealing grooves are provided at the top and bottom of the cavity sidewall, and sealing rings are provided in the sealing grooves to seal with the sealing element and the sealing base plate 2, respectively. Specifically, the bottom of the cavity sidewall is connected to the sealing base plate 2 by screws, and when the cavity sidewall and the sealing base plate 2 are connected, the sealing ring in the bottom sealing groove can be squeezed to deform it and achieve the purpose of sealing. When the sealing element closes the top opening of the cavity 1, it can also squeeze the sealing ring in the top sealing groove to deform it and achieve the purpose of sealing. Alternatively, the top sealing ring can be provided at the sealing connection between the lower surface of the sealing element and the opening, which can also achieve the sealing effect. Among them, the sealing ring is preferably an O-ring 41, and the contact surfaces of the above components with the O-ring 41 have been precision machined to ensure the stability of the seal.

[0049] In this embodiment, the sealing element is preferably a cavity sealing plate 13, and the driving mechanism is a linear driving mechanism, which can drive the cavity sealing plate 13 to reciprocate along the opening to open or close the opening, thereby realizing the opening or sealing of the receiving cavity 1; wherein, the opening is located at the top front end of the receiving cavity 1, and reciprocating along the opening means reciprocating back and forth along the opening; it should be noted that, as Figure 3As shown in this embodiment, when the reader is facing the paper, the end of the receiving cavity 1 opposite to the reader's left hand is the front end, the end opposite to the reader's right hand is the rear end, the side opposite to the reader is the front, and the side opposite to the front is the back.

[0050] Alternatively, other drive mechanisms can be selected to move the cavity sealing plate 13 according to specific work needs, so as to open or close the opening. For example, a rotating mechanism can be selected to drive the cavity sealing plate 13 to rotate back and forth, so as to open or close the opening.

[0051] In a preferred embodiment, the driving mechanism is mounted on the front of the receiving cavity 1. The driving mechanism includes a drive motor 4, the output shaft of which is connected to a transmission screw 7. The cavity sealing plate 13 is mounted on the transmission screw 7 via a shaped nut 8. A first guide member is provided on the side of the receiving cavity 1 near the transmission screw 7 for guidance, and the nut 8 is slidably mounted on the first guide member. Specifically, as shown... Figure 1 As shown, a first support frame 9 and a second support frame 10 are respectively provided at the front and rear ends of the front of the receiving cavity 1. The transmission screw 7 is arranged along the front-rear direction and parallel to the length direction of the receiving cavity 1, and the two ends of the transmission screw 7 are rotatably mounted on the first support frame 9 and the second support frame 10 respectively. The drive motor 4 is fixed to the first support frame 9 by fasteners and is located below the transmission screw 7. The output shaft of the drive motor 4 is connected to a transmission gear 6 through a coupling 5. The transmission gear 6 meshes with the transmission gear 6 installed at the front end of the transmission screw 7, thereby enabling the drive motor 4 to drive the transmission screw 7 to rotate, and further driving the nut 8 on the transmission screw 7 and the cavity sealing plate 13 connected to the nut 8 to perform linear motion. Figure 4 As shown, the first guide member is disposed on the front of the receiving cavity 1. The structure of the first guide member can be selected according to specific working needs, such as selecting a guide rail or a guide groove. In this embodiment, a straight groove is preferably provided on the front of the receiving cavity 1 along the front-back direction as the first guide member. A first pulley 20 is rotatably installed on the side of the nut 8 near the receiving cavity 1. The first pulley 20 is installed in the straight groove and can move linearly along the straight groove, thereby restricting the rotational movement of the nut 8 so that it can move linearly smoothly.

[0052] In this embodiment, the cavity sealing plate 13 is also connected to a pressing device. When the cavity sealing plate 13 closes the opening, the pressing device can drive the cavity sealing plate 13 to move downwards to compress the sealing ring provided at the top of the receiving cavity 1, thereby sealing the receiving cavity 1; specifically, as shown... Figure 1 and Figure 2As shown, the pressing device mainly includes a push-pull transmission plate 12, a guide connecting rod 14, and an elastic element. A straight groove 40 is inclinedly provided on the cavity sealing plate 13. The straight groove 40 gradually moves away from the opening from back to front (i.e., the front end of the straight groove 40 is inclined upwards, and the distance between the straight groove 40 and the top opening of the receiving cavity 1 gradually increases from back to front; the angle between the straight groove 40 and the horizontal plane is preferably 11°, and the length of the straight groove 40 is preferably 9mm). One end of the guide connecting rod 14 is slidably mounted on the second guide element, and the other end passes through the push-pull transmission plate. The opening on plate 12 passes through the straight groove 40 on the cavity sealing plate 13, connecting the second guide, the push-pull transmission plate 12, and the cavity sealing plate 13. When the opening is open, the guide connecting rod 14 is located at the bottom end of the straight groove 40. The push-pull transmission plate 12 is connected to the nut 8, and an elastic element is provided between the push-pull transmission plate 12 and the rear end face of the cavity sealing plate 13. The elastic element can push the cavity sealing plate 13 forward, ensuring that the guide connecting rod 14 is always located at the bottom end (i.e., the rear end) of the straight groove 40 in the initial state.

[0053] After the cavity sealing plate 13 closes the opening, the drive motor 4 drives the transmission screw 7 to continue rotating, which can drive the push-pull transmission plate 12 to compress the elastic element and drive the guide connecting rod 14 to move along the straight groove 40, thereby driving the cavity sealing plate 13 to press the sealing ring provided on the top of the receiving cavity 1 to seal the receiving cavity 1.

[0054] In this embodiment, the second guide and the first guide are respectively disposed on opposite sides of the receiving cavity 1, that is, the second guide is disposed on the back side of the receiving cavity 1. The structure of the second guide can be selected according to specific working needs, such as selecting a guide rail or a guide groove. As a preferred embodiment, in this embodiment, the second guide includes a slotted slide rail plate 15 disposed on the top of the back side of the receiving cavity 1. The slotted slide rail plate 15 is provided with a guide groove along the front-back direction as the second guide. The guide connecting rod 14 is installed in the guide groove through the second pulley 21 and can move linearly along the guide groove to ensure the smooth operation process.

[0055] In this embodiment, a spring plate fixing plate 18 is rigidly connected to the lower rear end of the push-pull transmission plate 12 by screws. The spring plate fixing plate 18 is rigidly connected to the above-mentioned elastic element by screws. The elastic element is preferably an elastic spring 19 with a certain elasticity. Alternatively, other elastic elements, such as springs, can be selected according to specific working needs.

[0056] In this embodiment, a pulley bracket 17 is installed on the front end of the upper surface of the cavity sealing plate 13 by screws, and a third pulley 22 is installed on the pulley bracket 17. A guide inclined plate 16 is installed on the top front end of the receiving cavity 1 by screws. A guide surface 39 is provided on the side of the guide inclined plate 16 facing the third pulley 22. The guide surface 39 can cooperate with the third pulley 22 and includes an inclined surface and an arc surface connected sequentially from top to bottom. The inclined surface is gradually closer to the opening from back to front.

[0057] The above-mentioned multiple pulley guide structures in this embodiment can reduce the degree of freedom of the seal, making its operation smooth and controllable, and improve the rigidity of the equipment during closed operation. At the same time, they play a guiding and positioning role, improving the reliability of equipment operation.

[0058] In this embodiment, the electrochemical generating device further includes a limiting component, which includes a first contact limiting switch 29 and a second contact limiting switch 30. The second contact limiting switch 30 and the first contact limiting switch 29 are respectively located at the front end and rear end of the receiving cavity 1. The second contact limiting switch 30 and the transmission screw 7 are located on the same side of the receiving cavity 1 (i.e., the second contact limiting switch 30 is located on the front side of the receiving cavity 1), and the first contact limiting switch 29 and the second guide are located on the same side of the receiving cavity 1 (i.e., the first contact limiting switch 29 is located on the back side of the receiving cavity 1).

[0059] A limit switch adjusting piece 11 is also provided on the side of the push-pull transmission plate 12 near the transmission screw 7. The limit switch adjusting piece 11 is disposed opposite to the second contact limit switch 30, and the distance between the limit switch adjusting piece 11 and the second contact limit switch 30 can be adjusted. Specifically, the limit switch adjusting piece 11 is an L-shaped adjusting piece, one of its straight edges is located in front of the push-pull transmission plate 12 and is disposed opposite to the second contact limit switch 30, and the other straight edge is installed on the side of the push-pull transmission plate 12. A straight groove is provided on the straight edge along the front-back direction. By passing a screw through the straight groove, the limit switch adjusting piece 11 can be installed on the push-pull transmission plate 12. By loosening the screw, the relative position of the straight groove and the screw can be adjusted, thereby adjusting the distance between the limit switch adjusting piece 11 and the second contact limit switch 30.

[0060] In this embodiment, when the second contact limit switch 30 contacts the limit switch adjusting piece 11, the receiving cavity 1 is sealed, and when the first contact limit switch 29 contacts the guide connecting rod 14, the opening is fully opened.

[0061] In this embodiment, the driving mechanism enables the sealing element to reciprocate smoothly, and its movement process is mainly divided into two parts:

[0062] Firstly, the drive motor 4 rotates forward, and through the coupling 5 and transmission gear 6, the transmission screw 7 rotates, driving the nut 8, push-pull transmission plate 12, cavity sealing plate 13, guide connecting rod 14, pulley bracket 17, spring fixing plate 18, and elastic spring 19 to perform horizontal linear motion. During this stage, the electrochemical generating device is in the closing process. During the closing process, the horizontal linear motion of the above-mentioned components ends at the contact between the third pulley 22 on the pulley bracket 17 and the guide inclined groove plate 16; the closing continues until the front end side surface of the cavity sealing plate 13 contacts the top of the inner wall of the receiving cavity 1. During this process, the cavity sealing plate 13 moves along the inclined surface of the guide inclined groove plate 16. This process is to adjust the initial contact position between the cavity sealing plate 13 and the receiving cavity 1, preventing uncertainty in its rigid contact position from affecting the uniformity of the compression of the top sealing ring of the receiving cavity 1 by the cavity sealing plate 13.

[0063] When the front end side surface of the cavity sealing plate 13 contacts the receiving cavity 1, the cavity sealing plate 13 no longer moves forward. At this moment, driven by the push-pull transmission plate 12, the guide connecting rod 14 moves in the straight groove 40 of the cavity sealing plate 13. The elastic spring 19 moves with the push-pull transmission plate 12 and is compressed and deformed between the spring fixing plate 18 and the rear end side surface of the cavity sealing plate 13. Under the action of the guide connecting rod 14, the cavity sealing plate 13 moves downward to compress the top sealing ring. When the adjusted limit switch 11 and the second contact limit switch 30 are in contact, the entire closing movement ends.

[0064] After the first process ends, the second part of the motion process begins: the activation of the electrochemical generator. The drive motor 4 reverses, and through the coupling 5 and transmission gear 6, the transmission screw 7 rotates. The nut 8, push-pull transmission plate 12, guide connecting rod 14, spring fixing plate 18, and elastic spring 19 move in opposite horizontal linear motion. Since the elastic spring 19 is still compressed at the end of the closing process, the cavity sealing plate 13 and pulley bracket 17 do not move synchronously under its thrust. When the guide connecting rod 14 is again at the lowest point of the straight groove 40 on the cavity sealing plate 13, the elastic spring 19 returns to its initial state, and the cavity sealing plate 13 and pulley bracket 17 again move synchronously with the push-pull transmission plate 12 until the guide connecting rod 14 contacts the first contact limit switch 29, at which point the operation stops.

[0065] In this embodiment, as Figure 8As shown, the sample clamping mechanism mainly includes a fixed base 23, a heating component, a sample clamping component 25, a temperature measuring component, and various circuit connectors. The fixed base 23 is fixed to the surface of the sealing base plate 2 with screws. The sample clamping component 25 is used to clamp the test sample, i.e., the battery sample 27. It is mounted on the fixed base 23 via a metal clamping spring 28. The metal clamping spring 28 not only fixes the sample clamping component 25 but also connects to the electrochemical test circuit 38, enabling the electrochemical test circuit 38 to conduct electricity with the sample clamping component 25, thus achieving charging and discharging. The heating component heats the test sample clamped by the sample clamping component 25. The heating component can be selected according to specific working needs, such as a heating wire or a heating plate. In this embodiment, the heating component is preferably a ceramic heating plate 24. A slot for installing the ceramic heating plate 24 is provided on the fixed base 23. The surface of the fixed sample clamping component 25 contacts the ceramic heating plate 24, allowing the heat from the ceramic heating plate 24 to be conducted to the battery sample 27, thus heating the battery sample 27. The temperature measurement component can be selected according to specific working needs, such as thermocouples, thermistors, etc., as long as it can detect the heating temperature of the ceramic heating element 24. In this embodiment, the temperature measurement component is preferably a temperature measuring thermocouple 26. The temperature measuring thermocouple 26 is fixed in the wire groove of the fixed base 23 and in contact with the ceramic heating element 24 to realize the heating temperature detection.

[0066] In this embodiment, the charging and discharging circuit (i.e., electrochemical test circuit 38) of the battery sample 27, the heating element circuit 37 of the ceramic heating element 24, and the circuit of the temperature measuring thermocouple 26 are respectively connected to their respective vacuum connectors, and the vacuum connectors are sealed and fixed to the side surface of the receiving cavity 1.

[0067] In this embodiment, the sample clamping assembly 25 is an important component for mounting the battery sample 27 and energizing the positive and negative electrodes, such as... Figure 6 and Figure 7 As shown, the sample clamping assembly 25 mainly includes a first clamp 31, a second clamp 32, a sample mounting plate 33, a plate locking screw 34, a clamp mounting screw 35, and an insulating gasket 36. The first clamp 31 and the second clamp 32 are arranged opposite to each other and connected by the clamp mounting screw 35. The main function of the insulating gasket 36 is to isolate the first clamp 31 and the second clamp 32. Insulating gaskets 36 are provided between the first clamp 31 and the second clamp 32 and on the nut clamping surface of the clamp mounting screw 35 to achieve insulation. To enable the positive and negative electrodes of the battery sample 27 to be energized, the first clamp 31 and the second clamp 32 are both made of conductive metal material, which is a mature existing technology in this field and will not be described in detail in this embodiment. Figure 10As shown, the clamp mounting screw 35 is threaded onto the first clamp 31, enabling communication with the first clamp 31. There is a gap between the clamp mounting screw 35 and the mounting hole on the second clamp 32 so they do not contact each other. Furthermore, an insulating washer 36 is provided between the nut clamping surface of the clamp mounting screw 35 and the second clamp 32. Therefore, the clamp mounting screw 35 and the second clamp 32 are not connected, and the first clamp 31 and the second clamp 32 are also not connected.

[0068] In this embodiment, the sample mounting plate 33 can be removed with tweezers and the battery sample 27 can be attached to its surface. The plate locking screw 34 is located on the side of the sample mounting plate 33 facing away from the first clamp 31, and is used to push the sample mounting plate 33 so that the battery sample 27 on it comes into contact with the first clamp 31.

[0069] In this embodiment, the electrochemical generating device also includes a handheld control box, which can control the drive motor 4 to open and close the receiving cavity 1. The control circuit of the drive motor 4 can be connected to the handheld control box via a plug-in connector or via wireless connection. In this embodiment, a plug-in connector is preferred.

[0070] Example 2

[0071] This embodiment provides an instrument, including the electrochemical generator described in Embodiment 1. The composition of the instrument can be selected according to specific needs. As a preferred embodiment, the instrument also includes a glove box and a scanning electron microscope. The electrochemical generator described in Embodiment 1 is preferably 95mm*69mm*40mm in size, which can be combined with vacuum glove boxes of various brands. It can also be fixed to the carrying platform of various scanning electron microscopes through the threaded holes on the sealing base plate 2. Since the battery sample 27 is mounted on the surface of the sample mounting plate 33 of the sample clamping assembly 25, there is sufficient space around it to meet the conditions for use and observation in the scanning electron microscope. In particular, it has good structural compatibility, vacuum compatibility and electromagnetic compatibility with the commonly used Tescan-S8000 scanning electron microscope. It can also be used in conjunction with other scanning electron microscopes with smaller cavities or with other observation instruments with open carrying forms.

[0072] The specific working process of this embodiment is as follows:

[0073] The first step is the preparation work before testing: the preparation of battery sample 27 and the preparation work before assembling battery sample 27.

[0074] Then, the prepared battery sample 27 and the electrochemical generator (including the handheld control box) in the open state are placed in a glove box filled with a protective atmosphere. The sample clamping mechanism inside the electrochemical generator is removed, and then the sample mounting plate 33 on the sample clamping mechanism is removed with tweezers. The prepared battery sample 27 is fixed to the surface of the sample mounting plate 33 with conductive adhesive. Then, the sample mounting plate 33 is placed back in its original position with tweezers, and the plate locking screw 34 is tightened. The sample clamping mechanism is then reinstalled. Finally, the electrochemical generator is closed using the handheld control box.

[0075] The next step is to transfer and install the electrochemical generator. Take the electrochemical generator out of the glove box in the closed state and transfer it to the electron microscope chamber of the scanning electron microscope. Fix the electrochemical generator as a whole on the platform of the scanning electron microscope. Open the plug-in connector to remove the handheld control box, and connect the plug-in control circuit of the drive motor 4 and the vacuum connector wire sealed and fixed to the side surface of the receiving cavity 1 to the vacuum connector on the vacuum flange of the scanning electron microscope.

[0076] The next step is to observe the charging and discharging of battery sample 27. A vacuum operation is performed on the scanning electron microscope. After the process is complete, the handheld control box is connected to the vacuum flange on the scanning electron microscope. The electrochemical generator is then turned on until the containment chamber 1 is fully opened. Next, the connector on the vacuum flange controlling the charging and discharging of battery sample 27 is connected to the power supply. The preset current and voltage are controlled, and the evolution of the microstructure of the positive and negative electrodes, including composition, morphology, and structure, and their corresponding electrical performance are observed within the scanning electron microscope. Simultaneously, the ceramic heating element 24 is controlled to apply temperature to the battery sample 27, and the effect of temperature on battery performance is observed within the scanning electron microscope.

[0077] After the experiment, the electrochemical generator was shut down using a handheld control box until the shutdown process was complete. The scanning electron microscope was then degaussed, and the battery sample 27 was subjected to final recovery processing.

[0078] It should be further explained that, in this embodiment, the opening and closing of the electrochemical generating device is equivalent to the opening and sealing of the accommodating cavity 1 by the sealing element.

[0079] The electrochemical generator of this invention features a compact structure, small size, light weight, and multiple functions, meeting the testing requirements of samples with special atmospheric conditions and providing a thermal field. This invention uses a drive motor to drive the sealing components and a clamping device to seal the receiving cavity, achieving sealing at atmospheric pressure -1x10⁻¹⁰. -3The test sample can be transferred in a vacuum by arbitrary opening and closing under a pressure environment of Pa, thus avoiding contamination by oxygen, moisture or dust when the test sample is transferred in a gaseous environment such as air.

[0080] Furthermore, the electrochemical generating device of this invention can be operated in a glove box, the sample can be sealed, and it can be opened in the high vacuum environment of the electron microscope chamber of a scanning electron microscope. Combined with the scanning electron microscope, the microstructural evolution of the positive and negative electrodes, such as composition, morphology, and structure, during the charging and discharging process of the test sample, as well as the corresponding relationship with electrical performance, can be observed, providing a test method for electrochemical testing of battery materials at the microscale.

[0081] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An electrochemical generation device, characterized by: The utility model provides a kind of electrochemical test device, including: Accommodation cavity, at least one side of the accommodation cavity is provided with opening, the opening is provided with sealing element, the sealing element can seal the accommodation cavity; Driving mechanism, the driving mechanism is connected with the sealing element, can drive the sealing element movement, to open or seal the accommodation cavity; Sample clamping mechanism, the sample clamping mechanism can clamp test sample, and the sample clamping mechanism can be electrically connected with electrochemical test circuit to carry out electrochemical test on the test sample; The sealing element is cavity sealing plate, the driving mechanism is linear driving mechanism, can drive the cavity sealing plate reciprocating movement along the opening, to open or close the opening;The sealing ring is provided at the sealing connection of the cavity sealing plate and the opening, the cavity sealing plate is also connected with pressing device, when the cavity sealing plate closes the opening, the pressing device can drive the cavity sealing plate to press the sealing ring, to seal the accommodation cavity; In the process of transferring the test sample, the sealing member is driven by the driving mechanism to seal the accommodation cavity, so that the test sample can be transferred in the atmospheric pressure environment of -1x10 -3 Pa. Any opening and closing of the atmospheric pressure environment of Pa is realized, and the test sample can be transferred in a vacuum environment to avoid contact with the external environment.

2. The electrochemical generation device according to claim 1, characterized by: The accommodation cavity is also provided with gas inlet, the gas inlet can input atmosphere gas into the accommodation cavity.

3. The electrochemical generating device of claim 1, wherein: The top of the accommodation cavity is provided with the opening.

4. The electrochemical generation device of claim 3, wherein: The driving mechanism includes driving motor, the driving motor is drivingly connected with transmission screw, and can drive the transmission screw to rotate, the cavity sealing plate is installed on the transmission screw through nut;The side of the accommodation cavity close to the transmission screw is provided with first guide, and the nut is slidingly installed on the first guide.

5. An electrochemical generating device according to claim 4, characterised in that: The pressing device includes push-pull transmission plate, guide connecting rod and elastic element, one end of the guide connecting rod is slidingly installed on second guide, the other end passes through the push-pull transmission plate and the cavity sealing plate, the cavity sealing plate is provided with straight slot opening obliquely, the straight slot opening gradually moves away from the opening from back to front, when the opening is opened, the guide connecting rod is located at the bottom end of the straight slot opening;The push-pull transmission plate is connected with the nut, and the push-pull transmission plate and the rear end surface of the cavity sealing plate are provided with elastic element, when the cavity sealing plate closes the opening, the driving motor drives the transmission screw to continue to rotate, can drive the push-pull transmission plate to compress the elastic element, and drives the guide connecting rod to move along the straight slot opening, so as to drive the cavity sealing plate to press the sealing ring, to seal the accommodation cavity; The front end of the cavity sealing plate is installed with third pulley through pulley support, the front end of the accommodation cavity is installed with guide inclined slot plate, the guide inclined slot plate is provided with guide surface, the guide surface can cooperate with the third pulley, the guide surface includes inclined surface and arc surface connected in sequence from top to bottom, the inclined surface is gradually close to the opening from back to front.

6. The electrochemical generating device of claim 5, wherein: The electrochemical generating device further comprises a limiting component, the limiting component comprises a first contact limiting switch and a second contact limiting switch, the second contact limiting switch and the first contact limiting switch are arranged at the front end and the rear end of the accommodating cavity respectively, wherein the second contact limiting switch is located at the same side of the accommodating cavity as the transmission screw, and the first contact limiting switch is located at the same side of the accommodating cavity as the second guide piece; The side of the push-pull transmission plate close to the transmission screw is further provided with a limiting switch adjusting piece, the limiting switch adjusting piece is arranged opposite to the second contact limiting switch, and the distance between the limiting switch adjusting piece and the second contact limiting switch can be adjusted; When the second contact limiting switch contacts the limiting switch adjusting piece, the accommodating cavity is sealed, and when the first contact limiting switch contacts the guide connecting rod, the opening is completely opened.

7. The electrochemical generating device of claim 1, wherein: The sample clamping mechanism comprises a sample clamping component, the sample clamping component comprises a first clamp and a second clamp arranged oppositely, and the first clamp and the second clamp can jointly clamp the test sample; wherein the second clamp is provided with a sample mounting tablet on the side close to the first clamp, the test sample can be mounted on the side of the sample mounting tablet close to the first clamp and can contact the first clamp; The sample clamping mechanism further comprises a mounting base, the sample clamping component is mounted on the mounting base, the mounting base is mounted on the sealing bottom plate of the accommodating cavity, a heating component is further mounted on the mounting base, the heating component can heat the test sample clamped by the sample clamping component, and a temperature measuring component is further arranged on the mounting base, the temperature measuring component can measure the heating temperature of the heating component.

8. An apparatus characterized by: The electrochemical generating device comprises the electrochemical generating device according to any one of claims 1-7. The electrochemical generating device comprises the electrochemical generating device according to any one of claims 1-7.

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