Detection fixture and detection system

Abstract

A detection fixture and a detection system. The detection fixture comprises a plurality of pressing plates and a pressurizing device; the plurality of pressing plates are arranged opposite to each other in a first direction, the plurality of pressing plates are used for clamping solid-state battery cells, and the pressing plates are configured to allow preset electromagnetic waves to pass through, so that the preset electromagnetic waves can detect the solid-state battery cells; and the pressurizing device pressurizes the solid-state battery cells by means of the pressing plates.

Description

Inspection fixtures and inspection systems Cross-reference to related applications

[0001] This application claims priority to Chinese patent application 202411744895.X, entitled "Inspection Fixture and Inspection System", filed on November 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and in particular to a testing fixture and testing system. Background Technology

[0003] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools. Battery cells can include nickel-cadmium battery cells, nickel-metal hydride battery cells, lithium-ion battery cells, and rechargeable alkaline zinc-manganese battery cells, among others.

[0004] In the development of battery technology, improving the reliability of individual battery cells has always been a research direction. Summary of the Invention

[0005] This application provides a testing fixture and testing system that can improve the reliability of individual battery cells.

[0006] In a first aspect, this application provides a testing fixture. The testing fixture includes multiple pressure plates and a pressurizing device. The multiple pressure plates are arranged opposite to each other along a first direction. The multiple pressure plates are used to clamp solid-state battery cells. The pressure plates are configured to allow a preset electromagnetic wave to pass through, so that the preset electromagnetic wave can detect the solid-state battery cells. The pressurizing device applies pressure to the solid-state battery cells through the pressure plates.

[0007] In the above scheme, by setting up a pressure plate and a pressurizing device, the pressure required for the operation of the solid-state battery cell is ensured, thereby enabling the solid-state battery cell to operate normally. By setting up a pressure plate that allows preset electromagnetic waves to penetrate, the interference caused by the pressure plate to the preset electromagnetic waves can be reduced when the preset electromagnetic waves are detecting the solid-state battery cell, thereby improving the accuracy of the solid-state battery cell detection results and improving the reliability of the solid-state battery cell.

[0008] In some embodiments, the preset electromagnetic wave includes at least one of visible light and X-rays.

[0009] In the above scheme, solid-state battery cells can be tested in multiple ways to increase the types of solid-state battery cells that can be tested and improve the reliability of solid-state battery cell failure analysis.

[0010] In some embodiments, the material of the pressure plate includes at least one of a light-transmitting material, beryllium, and titanium alloy.

[0011] In the above scheme, a variety of materials can be used to prepare the pressure plate, thereby increasing the applicability and the range of materials that can be selected for the pressure plate, and reducing the manufacturing cost of the pressure plate.

[0012] In some embodiments, the plurality of pressure plates include a first pressure plate and a second pressure plate disposed opposite to each other along a first direction, and the pressurizing device applies pressure to the side of the first pressure plate facing away from the second pressure plate.

[0013] In the above scheme, applying pressure to one side of the solid-state battery cell helps to improve the uniformity of pressure distribution. When pressure is applied to the first pressure plate, the second pressure plate can support the solid-state battery cell, reduce the mechanical stress inside the solid-state battery cell, and reduce the possibility of damage to the internal structure of the solid-state battery cell due to uneven pressure.

[0014] In some embodiments, the testing fixture further includes a housing having an opening for receiving a pressure plate and a solid-state battery cell.

[0015] In the above solution, by setting up an outer casing, it is beneficial to reduce the possibility of damage to the external environment and operators when a solid-state battery cell experiences thermal runaway, thereby improving reliability.

[0016] In some embodiments, the housing includes a side wall and a bottom wall, and an opening is provided at one end of the housing away from the bottom wall. A first pressure plate and a second pressure plate are both disposed in the opening, and the first pressure plate is located on the side of the second pressure plate facing away from the bottom wall.

[0017] In the above scheme, the above settings help to reduce the possibility of pressure plate movement or damage caused by the positional displacement of the pressure plate and the pressurizing device, making it easier for testing instruments or personnel to approach and test solid-state battery cells, and simplifying the testing process.

[0018] In some embodiments, the housing includes two openings, and a second pressure plate is connected to the housing and covers one of the openings.

[0019] In the above scheme, the above settings help to reduce the number of individual pressure plates, so that the solid-state battery cell and the first pressure plate can be pressurized simply by placing them into the opening, simplifying the pressurization process and improving the testing efficiency.

[0020] In some embodiments, the housing includes a bottom wall with a first through hole extending through the bottom wall in a first direction to expose a portion of the pressure plate.

[0021] In the above scheme, by setting a first through hole, visible light can be irradiated onto the solid-state battery cell through the first through hole and the second pressure plate, which helps optical instruments and other testing instruments to test the solid-state battery cell, simplifies the testing method, simplifies the structure of the testing fixture, and reduces the difficulty of manufacturing the testing fixture.

[0022] In some embodiments, the pressurizing device includes a first pressurizing member connected to the housing and disposed on the side of the first pressure plate facing away from the second pressure plate.

[0023] In the above scheme, by setting a first pressure member and connecting the first pressure member to the outer casing, the outer casing and the first pressure member together restrict the movement of the first pressure plate and the second pressure plate, so that the pressure applied by the pressure plate to the fixed battery cell is maintained within a certain range, thereby simplifying the pressure holding structure of the solid-state battery cell and reducing manufacturing costs.

[0024] In some embodiments, the first pressure member and the housing are threaded together to simplify the connection between the first pressure member and the housing, which is beneficial for adjusting the position of the first pressure member in the opening. At the same time, the threaded connection can also reduce the possibility that the pressure on the solid-state battery cell will drop due to the first pressure member being pushed away by the pressure plate.

[0025] In some embodiments, the first pressure member includes a second through hole that extends through the first pressure member along a first direction to expose a portion of the pressure plate.

[0026] In the above scheme, by setting a second through hole, visible light can be irradiated onto the solid-state battery cell through the second through hole and the first pressure plate, which helps optical instruments and other testing instruments to test the solid-state battery cell. At the same time, combined with the first through hole, the detection direction of the solid-state battery cell can be increased, and the detection accuracy of the solid-state battery cell can be improved.

[0027] In some embodiments, the pressurizing device further includes a pressurizing rod and a driving member, the driving member driving the pressurizing rod to move along a first direction, the pressurizing rod passing through a second through hole and abutting against a pressure plate.

[0028] In the above scheme, the above settings enable the second through hole to play a role in avoiding pressure during the pressurization process and to serve as an observation opening during the pressure holding process, thereby simplifying the overall structure of the first pressurizing component and reducing manufacturing costs.

[0029] In some embodiments, the pressurizing device further includes a pressurizing rod and a driving member, the driving member driving the pressurizing rod to pressurize the pressure plate.

[0030] In the above scheme, the driving component drives the pressure rod to continuously pressurize the pressure plate to ensure the pressure required during the charging and discharging of solid-state battery cells, thereby simplifying the pressure and pressure holding structure and reducing manufacturing costs.

[0031] Secondly, embodiments of this application provide a detection system, including the detection fixture in any of the foregoing embodiments; and a charging and discharging device for charging and discharging the solid-state battery cell.

[0032] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 is a schematic diagram of the structure of a solid-state battery cell provided in an embodiment of this application;

[0035] Figure 2 is an exploded structural diagram of a detection fixture provided in an embodiment of this application;

[0036] Figure 3 is an exploded structural diagram of another detection fixture provided in an embodiment of this application;

[0037] Figure 4 is a schematic diagram of the exploded structure of the outer shell of a testing fixture provided in an embodiment of this application;

[0038] Figure 5 is a structural schematic diagram of a detection fixture provided in an embodiment of this application;

[0039] Figure 6 is a cross-sectional structural diagram of a detection fixture provided in an embodiment of this application;

[0040] Figure 7 is a cross-sectional structural schematic diagram of another detection fixture provided in an embodiment of this application;

[0041] Figure 8 is an exploded structural diagram of another detection fixture provided in an embodiment of this application;

[0042] Figure 9 is a cross-sectional structural diagram of another detection fixture provided in an embodiment of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 10. Pressure plate; 11. First pressure plate; 12. Second pressure plate;

[0045] 20. Pressurizing device; 21. First pressurizing component; 211. Second through hole; 22. Pressurizing rod; 23. Driving component;

[0046] 30. Outer shell; 31. Opening; 32. Side wall; 33. Bottom wall; 331. First through hole;

[0047] 40. Solid-state battery cells;

[0048] Z, First direction. Detailed Implementation

[0049] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0052] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0054] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0055] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0057] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0058] As an important part of the future battery field, solid-state battery cells will be used not only in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in military equipment and aerospace, with further research and development.

[0059] Because the characteristics of solid-state battery cells are quite different from those of traditional liquid batteries, solid-state battery cells need to be pressurized during operation. Therefore, when designing solid-state battery modules, an independent pressurization device is required to provide pressure for them.

[0060] To perform performance testing and failure analysis on solid-state battery cells, it is necessary to inspect the cells during operation. However, the structure used to pressurize the solid-state battery cells is usually a high-strength metal component such as steel. This causes interference between the pressurized structure and the inspection structure during the inspection, reducing the accuracy and reliability of the test results.

[0061] Based on the above-mentioned technical problems, this application provides a technical solution that uses a pressure plate and a pressurizing device to ensure the pressure required for the operation of a solid-state battery cell, thereby enabling the solid-state battery cell to operate normally. By setting a pressure plate that allows preset electromagnetic waves to penetrate, the interference caused by the pressure plate to the preset electromagnetic waves can be reduced when the preset electromagnetic waves are detecting the solid-state battery cell, thereby improving the accuracy of the solid-state battery cell detection results and improving the reliability of the solid-state battery cell.

[0062] Please refer to the figure. An embodiment of this application provides a detection system, which includes a detection fixture and a charging and discharging device for charging and discharging solid-state battery cells.

[0063] The testing fixture can apply a preset pressure to a solid-state battery cell to induce it to charge and discharge under the required pressure. The preset pressure can be a constant pressure or a pressure within a certain range.

[0064] Figure 1 is a structural schematic diagram of a solid-state battery cell provided in an embodiment of this application. Figure 2 is an exploded structural schematic diagram of a testing fixture provided in an embodiment of this application. Figure 3 is an exploded structural schematic diagram of yet another testing fixture provided in an embodiment of this application.

[0065] Please refer to Figures 1 to 3. This application embodiment provides a testing fixture. The testing fixture includes multiple pressure plates 10, arranged opposite each other along a first direction Z. The multiple pressure plates 10 are used to clamp solid-state battery cells 40. The pressure plates 10 are configured to allow a preset electromagnetic wave to pass through, so that the preset electromagnetic wave can detect the solid-state battery cell 40. A pressurizing device 20 applies pressure to the solid-state battery cell 40 through the pressure plates 10.

[0066] In some embodiments, the testing fixture can pressurize the solid-state battery cell 40, and the testing fixture can also maintain the pressure of the solid-state battery cell 40 so that the solid-state battery cell 40 is within a constant pressure range during charging and discharging.

[0067] In some embodiments, the number of pressure plates 10 may include two, three, four or more.

[0068] Optionally, adjacent pressure plates 10 on opposite sides along the first direction Z can be used to clamp solid-state battery cells 40. One or more solid-state battery cells 40 can be clamped between adjacent pressure plates 10. Optionally, the first direction Z can be parallel to the thickness direction of the solid-state battery cell 40. That is, the first direction Z is the stacking direction of the inner electrode sheets of the solid-state battery cell 40.

[0069] Optionally, when the number of pressure plates 10 includes two, pressure can be applied to one of the pressure plates 10 to pressurize the solid-state battery cell 40, or pressure can be applied to both pressure plates 10 to pressurize the solid-state battery cell 40.

[0070] Optionally, when the number of pressure plates 10 includes multiple pressure plates, that is, multiple pressure plates 10 and multiple solid-state battery cells 40 are alternately arranged along the first direction Z to form a row of pressure plates 10, wherein two pressure plates 10 are respectively located at both ends of the row of pressure plates 10 along the first direction Z. Pressure can be applied to only one pressure plate 10 located at both ends of the row of pressure plates 10 to pressurize the solid-state battery cell 40, or pressure can be applied to both pressure plates 10 located at both ends of the row of pressure plates 10 to pressurize the solid-state battery cell 40, or pressure can be applied separately to the pressure plates 10 between the two end pressure plates 10 in the row of pressure plates 10, so as to improve the uniformity of the pressure on each solid-state battery cell 40.

[0071] Alternatively, the multiple pressure plates 10 may have the same shape or different shapes.

[0072] The pressure plate 10 is configured to allow preset electromagnetic waves to pass through, so that the preset electromagnetic waves can detect the solid-state battery cell 40. This means that although the preset electromagnetic waves are partially absorbed by the pressure plate 10 when they pass through the pressure plate 10, there are still electromagnetic waves of sufficient intensity that can penetrate and reach the solid-state battery cell 40 between the pressure plates 10, thereby realizing the detection of the solid-state battery cell 40.

[0073] Optionally, before the charging and discharging process of the solid-state battery cell 40, the pressurizing device 20 can pressurize the solid-state battery cell 40 through the pressure plate 10 to achieve the required pressure. During the charging and discharging process of the solid-state battery cell 40, the pressurizing device 20 can continuously pressurize the solid-state battery cell 40 through the pressure plate 10 to reduce the risk of thermal runaway caused by the expansion deformation of the solid-state battery cell 40 during charging and discharging. Alternatively, before the charging and discharging process, after reaching the required pressure of the solid-state battery cell 40, the pressurizing device 20 can be removed, and the solid-state battery cell 40 can be pressure-maintained by other pressure-holding structures to reduce the risk of explosion of the solid-state battery cell 40 if thermal runaway occurs during charging and discharging and the pressurizing device 20 cannot stop pressurizing in time.

[0074] In this embodiment, by setting a pressure plate 10 and a pressurizing device 20, the pressure required for the operation of the solid-state battery cell 40 is ensured, thereby enabling the solid-state battery cell 40 to operate normally. By setting a pressure plate 10 that allows preset electromagnetic waves to penetrate, the interference caused by the pressure plate 10 to the preset electromagnetic waves can be reduced when the preset electromagnetic waves are detecting the solid-state battery cell 40, thereby improving the accuracy of the detection results of the solid-state battery cell 40 and improving the reliability of the solid-state battery cell 40.

[0075] In some alternative embodiments, the preset electromagnetic wave includes at least one of visible light and X-rays.

[0076] Optionally, when the electromagnetic wave is preset to visible light, the solid-state battery cell 40 can be detected by an optical instrument. Optionally, the optical instrument includes an optical microscope. Optionally, the casing of the solid-state battery cell 40 can be made into a transparent casing to allow visible light to pass through. Optionally, the casing of the solid-state battery cell 40 is provided with an electrode, which includes a current collector and a solid electrolyte. The current collector can be made into a transparent conductive material to allow visible light to pass through, thereby detecting the electrochemical reaction between the anode and cathode electrodes during charging and discharging.

[0077] Optionally, when the electromagnetic wave is preset to X-rays, an X-ray machine can be used as the light source to irradiate the solid-state battery cell 40 between the pressure plates 10. Then, a digital flat panel detector is used to receive the remaining X-rays after they have penetrated the object. Due to differences in the internal structure and material density of the solid-state battery cell 40, the intensity of the X-rays received by the detector will also vary. These differences, after image processing and algorithm processing, form an X-ray imaging image with black-and-white contrast and tonal differences, thereby displaying the internal structure and defects of the solid-state battery cell 40, improving the accuracy of data analysis in the failure and mechanism research of the solid-state battery cell 40.

[0078] In these alternative embodiments, the solid-state battery cell 40 can be tested in a variety of ways to increase the types of tests performed on the solid-state battery cell 40 and improve the reliability of failure analysis of the solid-state battery cell 40.

[0079] In some alternative embodiments, the material of the pressure plate 10 includes at least one of a light-transmitting material, beryllium, and titanium alloy.

[0080] Optionally, when the material of the pressure plate 10 is a light-transmitting material, visible light can pass through the pressure plate 10 to irradiate the solid-state battery cell 40. When the solid-state battery cell 40 adopts a light-transmitting shell and a light-transmitting current collector, the electrochemical process between the anode and cathode of the solid-state battery cell 40 can be detected.

[0081] Optionally, both beryllium and titanium alloys are materials with high X-ray transmittance. When the material of the pressure plate 10 is beryllium or titanium alloy, the absorption of X-rays by the pressure plate 10 can be reduced when X-rays pass through the pressure plate 10, thereby increasing the intensity of X-rays irradiating the solid-state battery cell 40 and improving the clarity and accuracy of the detection image.

[0082] In these alternative embodiments, a variety of materials can be used to prepare the pressure plate 10 to improve its applicability and increase the range of materials that can be selected for the pressure plate 10, thereby reducing the manufacturing cost of the pressure plate 10.

[0083] In some alternative embodiments, referring to FIG3, the plurality of pressure plates 10 include a first pressure plate 11 and a second pressure plate 12 disposed opposite to each other along a first direction Z, and the pressurizing device 20 applies pressure to the side of the first pressure plate 11 facing away from the second pressure plate 12.

[0084] Optionally, the first pressure plate 11 and the second pressure plate 12 are arranged opposite to each other along the first direction Z, and the first pressure plate 11 and the second pressure plate 12 are used to clamp the solid-state battery cell 40. The materials of the first pressure plate 11 and the second pressure plate 12 can be different. For example, the first pressure plate 11 includes a cushioning material to reduce the possibility that the solid-state battery cell 40 may be squeezed and deformed or even exploded due to the abnormal pressure applied by the pressurizing device 20 to the first pressure plate 11.

[0085] In these alternative embodiments, applying pressure to one side of the solid-state battery cell 40 helps to improve the uniformity of pressure distribution. When pressure is applied to the first pressure plate 11, the second pressure plate 12 can support the solid-state battery cell 40, reduce the mechanical stress inside the solid-state battery cell 40, and reduce the possibility of damage to the internal structure of the solid-state battery cell 40 due to uneven pressure.

[0086] Figure 4 is a schematic diagram of the exploded structure of the outer shell of a testing fixture provided in an embodiment of this application.

[0087] In some alternative embodiments, referring to FIG4, the testing fixture also includes a housing 30 having an opening 31 for receiving the pressure plate 10 and the solid-state battery cell 40.

[0088] Alternatively, the outer casing 30 may be cylindrical, cuboid, cube, or other shapes.

[0089] Optionally, the outer casing 30 can be a thin-walled structure, with its inner wall enclosing an opening 31. The opening can refer to an unclosed portion of the outer casing 30. The opening 31 is recessed at one end along the first direction Z of the outer casing 30, and the projected shape of the opening 31 along the first direction Z can be circular, square, rectangular, or other shapes. Of course, the projected shape of the opening 31 along the first direction Z can also match the projected shape of the pressure plate 10 along the first direction Z. For example, if the projected shape of the pressure plate 10 along the first direction Z is square, the projected shape of the opening 31 along the first direction Z is also square. Optionally, the projection of the opening 31 along the first direction Z overlaps with the projection of the pressure plate 10 along the first direction Z. Alternatively, the projection of the pressure plate 10 along the first direction Z falls within the projection of the opening 31 along the first direction Z.

[0090] Alternatively, the material of the housing 30 can be at least one of a light-transmitting material, beryllium, and titanium alloy. The material of the housing 30 can be matched with the material of the pressure plate 10.

[0091] The opening 31 can accommodate the first pressure plate 11, the second pressure plate 12, and the solid-state battery cell 40 between the first pressure plate 11 and the second pressure plate 12. Alternatively, the opening 31 can accommodate only the second pressure plate 12 and the solid-state battery cell 40, without at least a portion of the first pressure plate 11 being placed within the opening 31. The three-layer structure of the second pressure plate 12, the solid-state battery cell 40, and the first pressure plate 11 can be stacked and placed into the opening 31 together, or the second pressure plate 12, the solid-state battery cell 40, and the first pressure plate 11 can be placed into the opening 31 sequentially.

[0092] Optionally, a wiring harness hole may also be provided on the housing 30, which allows the wiring harness to pass through the housing 30 and enter the opening 31 to be electrically connected to the solid-state battery cell 40.

[0093] Optionally, a guide structure may be provided on the inner wall of the opening 31 to simplify the insertion of the pressure plate 10 and the solid-state battery cell 40 into the opening 31.

[0094] In these alternative embodiments, by providing the housing 30, it is beneficial to reduce the possibility of damage to the external environment and workers in the event of thermal runaway of the solid-state battery cell 40, thereby improving reliability.

[0095] Figure 5 is a structural schematic diagram of a testing fixture provided in an embodiment of this application. Figure 6 is a cross-sectional structural schematic diagram of a testing fixture provided in an embodiment of this application.

[0096] In some alternative embodiments, please refer to Figures 4 to 6. The housing 30 includes a side wall 32 and a bottom wall 33. An opening 31 is provided at one end of the housing 30 away from the bottom wall 33. The first pressure plate 11 and the second pressure plate 12 are both disposed in the opening 31, and the first pressure plate 11 is located on the side of the second pressure plate 12 facing away from the bottom wall 33.

[0097] Optionally, the sidewall 32 and the bottom wall 33 enclose an opening 31.

[0098] Optionally, a groove may be provided on the side of the bottom wall 33 facing the opening 31, and at least a portion of the second pressure plate 12 may be placed in the groove to reduce the possibility of displacement during the pressurization of the solid-state battery cell 40.

[0099] In these alternative embodiments, the above-described configuration helps to reduce the possibility of the pressure plate 10 moving or being damaged due to the positional misalignment of the pressure plate 10 and the pressurizing device 20, making it easier for testing instruments or personnel to access and test the solid-state battery cell 40, and simplifying the testing process.

[0100] Figure 7 is a cross-sectional structural diagram of another detection fixture provided in an embodiment of this application.

[0101] In some alternative embodiments, referring to FIG7, the housing 30 includes two openings 31, and the second pressure plate 12 is connected to the housing 30 and covers one opening 31.

[0102] For example, the outer casing 30 has an opening 31 at each end along the first direction Z, and the two openings can be connected. The second pressure plate 12 is connected to the outer casing 30 such that the second pressure plate 12 covers one of the openings 31, so that only one opening 31 on the outer casing 30 is connected to the outside.

[0103] Optionally, the second pressure plate 12 can be connected to the outer casing 30 by welding, riveting, bolting, or other methods. Optionally, the second pressure plate 12 can serve as the bottom wall 33 of the outer casing 30.

[0104] In these alternative embodiments, the above-described arrangement helps to reduce the number of individual pressure plates 10, allowing the solid-state battery cell 40 and the first pressure plate 11 to be pressurized simply by placing them into the opening 31, thus simplifying the pressurization process and improving testing efficiency.

[0105] In some alternative embodiments, please refer to FIG6, the housing 30 includes a bottom wall 33, the bottom wall having a first through hole 331, the first through hole penetrating the bottom wall 33 along a first direction Z to expose a portion of the pressure plate 10.

[0106] Optionally, the projection shape of the first through hole 331 along the first direction Z can be circular, square, rectangular or other shapes.

[0107] Optionally, the number of first through holes 331 can be one or more.

[0108] Optionally, the first through hole 331 may be filled with a light-transmitting material to reduce the possibility of external impurities entering the first through hole 331 and blocking it.

[0109] Optionally, a light source may be provided on the sidewall 32 of the first through hole 331 to illuminate the first through hole 331, thereby improving the detection accuracy.

[0110] In these alternative embodiments, by providing a first through hole 331, visible light can be irradiated onto the solid-state battery cell 40 through the first through hole 331 and the second pressure plate 12, which helps optical instruments and other testing instruments to test the solid-state battery cell 40, simplifies the testing method, simplifies the structure of the testing fixture, and reduces the difficulty of manufacturing the testing fixture.

[0111] Figure 8 is an exploded structural diagram of another detection fixture provided in an embodiment of this application.

[0112] In some alternative embodiments, please refer to Figures 5, 6 and 8. The pressurizing device 20 includes a first pressurizing member 21, which is connected to the housing 30. The first pressurizing member 21 is disposed on the side of the first pressure plate 11 facing away from the second pressure plate 12.

[0113] Optionally, before pressurizing the solid-state battery cell 40, the second pressure plate 12, the solid-state battery cell 40, and the first pressure plate 11 can be placed into the opening 31 of the housing 30. When the solid-state battery cell 40 is pressurized and the required pressure is reached, the first pressure-pressurizing component 21 can be fixedly connected to the housing 30 to restrict the movement of the first pressure plate 11, thereby achieving pressure maintenance of the solid-state battery cell 40.

[0114] Optionally, the first pressure member 21 closes to the opening 31.

[0115] Optionally, at least a portion of the first pressurizing member 21 is located within the opening 31.

[0116] Optionally, the first pressure member 21 and the outer casing 30 can be detachably connected by means of snap-fit, threaded connection, pin connection, etc.

[0117] In these alternative embodiments, by providing a first pressure member 21 and connecting the first pressure member to the housing 30, the housing and the first pressure member 21 together restrict the movement of the first pressure plate 11 and the second pressure plate 12, so that the pressure applied by the pressure plate to the fixed battery cell is maintained within a certain range, thereby simplifying the pressure holding structure of the solid-state battery cell 40 and reducing manufacturing costs.

[0118] In some alternative embodiments, the first pressure member 21 and the housing 30 are threaded together to simplify the connection between the first pressure member 21 and the housing 30, which is beneficial for adjusting the position of the first pressure member 21 in the opening 31. At the same time, the threaded connection can also reduce the possibility that the pressure on the solid-state battery cell 40 will drop due to the first pressure member 21 being pushed away by the pressure plate 10.

[0119] Optionally, the first pressure member 21 may be provided with an external thread, and the opening 31 may be provided with an internal thread. Of course, the first pressure member 21 may also be provided with an internal thread, and the outer surface of the outer casing 30 may be provided with an external thread.

[0120] Figure 9 is a cross-sectional structural diagram of another detection fixture provided in an embodiment of this application.

[0121] In some alternative embodiments, referring to FIG9, the first pressure member 21 includes a second through hole 211 that extends through the first pressure member 21 along a first direction Z to expose a portion of the pressure plate 10.

[0122] Optionally, the projection shape of the second through hole 211 along the first direction Z can be circular, square, rectangular or other shapes.

[0123] Optionally, the number of second through holes 211 can be one or more.

[0124] Optionally, the second through hole 211 may be filled with a light-transmitting material to reduce the possibility of external impurities entering the second through hole 211 and blocking it.

[0125] Optionally, a light source may be provided on the sidewall 32 of the second through hole 211 to illuminate the second through hole 211, thereby improving the detection accuracy.

[0126] Optionally, the projection of the second through hole 211 along the first direction Z and the projection of the first through hole 331 along the first direction Z may at least partially overlap.

[0127] For example, the projection of the second through hole 211 along the first direction Z overlaps with the projection of the first through hole 331 along the first direction Z. Alternatively, the projection of the second through hole 211 along the first direction Z falls within the projection of the first through hole 331 along the first direction Z. Alternatively, the projection of the first through hole 331 along the first direction Z falls within the projection of the second through hole 211 along the first direction Z. Alternatively, a portion of the projection of the second through hole 211 along the first direction Z overlaps with a portion of the projection of the first through hole 331 along the first direction Z.

[0128] In these alternative embodiments, by providing a second through hole 211, visible light can be irradiated onto the solid-state battery cell 40 through the second through hole 211 and the first pressure plate 11, which helps the detection instruments such as optical instruments to detect the solid-state battery cell 40. At the same time, combined with the first through hole 331, the detection direction of the solid-state battery cell 40 can be increased, and the detection accuracy of the solid-state battery cell 40 can be improved.

[0129] In some alternative embodiments, please refer to Figures 6 and 9. The pressurizing device 20 further includes a pressurizing rod 22 and a driving member 23. The driving member drives the pressurizing rod 22 to move along the first direction Z. The pressurizing rod passes through the second through hole 211 and abuts against the pressure plate 10.

[0130] Optionally, the drive unit 23 may include a hydraulic cylinder, a pneumatic cylinder, a press, or other pressurizing device 20.

[0131] Optionally, the pressure rod 22 moves along the first direction Z to apply pressure to the pressure plate 10, thereby causing the pressure device 20 to pressurize the solid-state battery cell 40.

[0132] In some embodiments, after the second pressure plate 12, the solid-state battery cell 40 and the first pressure plate 11 are placed in the opening 31, the pressure rod 22 is passed through the second through hole 211 so that the first pressure member 21 is located on the pressure rod 22. The driving member 23 drives the pressure rod to apply pressure to the first pressure plate 11. When the required pressure for the solid-state battery cell 40 is reached, the driving member 23 stops driving the pressure rod 22, the first pressure member 21 is connected to the housing 30 and the first pressure member 21 abuts against the first pressure plate 11, and then the driving rod is moved from the second through hole 211 to the outside so that optical instruments and other testing instruments can test the solid-state battery cell 40 through the second through hole 211.

[0133] In these alternative embodiments, the above-described configuration enables the second through hole 211 to serve as an obstacle avoidance mechanism during pressurization and as an observation opening 31 during pressure holding, thereby simplifying the overall structure of the first pressurizing component 21 and reducing manufacturing costs.

[0134] In some alternative embodiments, referring to FIG2, the pressurizing device 20 further includes a pressurizing rod 22 and a driving member 23, the driving member driving the pressurizing rod 22 to pressurize the pressure plate 10.

[0135] In this embodiment, the driving member 23 drives the pressure rod 22 to continuously pressurize the pressure plate 10 to ensure the pressure required during the charging and discharging of the solid-state battery cell 40, thereby simplifying the pressurization and pressure holding structure and reducing manufacturing costs.

[0136] Secondly, embodiments of this application provide a detection system, including the detection fixture and charging / discharging device as described in any of the foregoing embodiments. The charging / discharging device is used to charge and discharge a solid-state battery cell 40.

[0137] According to some embodiments of this application, referring to Figures 5, 6, 8, and 9, the detection fixture includes multiple pressure plates 10 and a pressurizing device 20. The multiple pressure plates are arranged opposite each other along a first direction Z. The multiple pressure plates 10 are used to clamp solid-state battery cells 40. The pressure plates 10 are configured to allow a preset electromagnetic wave to pass through, so that the preset electromagnetic wave can detect the solid-state battery cell 40. The pressurizing device 20 pressurizes the solid-state battery cell 40 through the pressure plates 10.

[0138] The preset electromagnetic waves include at least one of visible light and X-rays. The material of the pressure plate 10 includes at least one of light-transmitting material, beryllium, and titanium alloy.

[0139] The plurality of pressure plates 10 include a first pressure plate 11 and a second pressure plate 12 arranged opposite to each other along a first direction Z, and the pressurizing device 20 applies pressure to the side of the first pressure plate 11 facing away from the second pressure plate 12.

[0140] The testing fixture also includes a housing 30 with an opening 31 for accommodating the pressure plate 10 and the solid-state battery cell 40. The housing 30 includes a side wall 32 and a bottom wall 33. The opening 31 is located at the end of the housing away from the bottom wall. Both the first pressure plate 11 and the second pressure plate 12 are disposed within the opening 31, with the first pressure plate 11 located on the side of the second pressure plate 12 facing away from the bottom wall 33. The housing 30 includes a bottom wall 33 with a first through hole 331 extending through the bottom wall 33 in a first direction Z to expose a portion of the pressure plate 10.

[0141] The pressurizing device 20 includes a first pressurizing member 21, which is connected to the housing 30 and disposed on the side of the first pressure plate 11 facing away from the second pressure plate 12. The first pressurizing member 21 and the housing 30 are threadedly connected. The first pressurizing member 21 includes a second through hole 211, which penetrates the first pressurizing member 21 along a first direction Z to expose a portion of the pressure plate 10. The pressurizing device 20 also includes a pressurizing rod 22 and a driving member 23, which drives the pressurizing rod 22 to move along the first direction Z. The pressurizing rod passes through the second through hole 211 and abuts against the pressure plate 10.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A testing fixture, comprising: Multiple pressure plates are arranged opposite each other along a first direction. The multiple pressure plates are used to clamp solid-state battery cells. The pressure plates are configured to allow a preset electromagnetic wave to pass through, so that the preset electromagnetic wave can detect the solid-state battery cell. The pressurizing device applies pressure to the solid-state battery cell via the pressure plate.

2. The detection fixture according to claim 1, wherein, The preset electromagnetic wave includes at least one of visible light and X-rays.

3. The detection fixture according to claim 1 or 2, wherein, The material of the pressure plate includes at least one of light-transmitting material, beryllium, and titanium alloy.

4. The detection fixture according to any one of claims 1 to 3, wherein, The plurality of pressure plates include a first pressure plate and a second pressure plate disposed opposite to each other along the first direction, and the pressurizing device applies pressure to the side of the first pressure plate opposite to the second pressure plate.

5. The detection fixture according to claim 4, wherein, It also includes a housing having an opening for accommodating the pressure plate and the solid-state battery cell.

6. The detection fixture according to claim 5, wherein, The outer casing includes a side wall and a bottom wall. An opening is provided at one end of the outer casing away from the bottom wall. The first pressure plate and the second pressure plate are both disposed in the opening, and the first pressure plate is located on the side of the second pressure plate facing away from the bottom wall.

7. The detection fixture according to claim 5, wherein, The housing includes two openings, and the second pressure plate is connected to the housing and covers one of the openings.

8. The detection fixture according to claim 5, wherein, The outer casing includes a bottom wall, the bottom wall having a first through hole that extends through the bottom wall along the first direction to expose a portion of the pressure plate.

9. The detection fixture according to claim 5, wherein, The pressurizing device includes a first pressurizing component, which is connected to the outer casing and is disposed on the side of the first pressure plate facing away from the second pressure plate.

10. The detection fixture according to claim 9, wherein, The first pressure component and the outer casing are threadedly connected.

11. The detection fixture according to claim 9 or 10, wherein, The first pressure member includes a second through hole that extends through the first pressure member along the first direction to expose a portion of the pressure plate.

12. The detection fixture according to claim 11, wherein, The pressurizing device further includes a pressurizing rod and a driving member. The driving member drives the pressurizing rod to move along the first direction. The pressurizing rod passes through the second through hole and abuts against the pressure plate.

13. The detection fixture according to any one of claims 1 to 12, wherein, The pressurizing device further includes a pressurizing rod and a driving member, the driving member driving the pressurizing rod to pressurize the pressure plate.

14. A detection system comprising a detection fixture as described in any one of claims 1 to 13; and A charging and discharging device for charging and discharging the solid-state battery cells.

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