Solid state battery test mold

Abstract

The application relates to a solid-state battery test mold, which comprises a mold frame, a top electrode column, a bottom electrode column, a top insulating seat, a bottom insulating seat and a test module; the mold frame comprises a first supporting plate, a second supporting plate, a supporting rod and a fixing piece, the test module comprises a columnar test shell, an upper cover, a lower cover and a hollow ceramic column, the hollow ceramic column is arranged in the columnar test shell, a test space is formed between the first end of the top electrode column and the first end of the bottom electrode column, the second end of the bottom electrode column is provided with a first external connecting hole, and the second end of the top electrode column is provided with a second external connecting hole. Through the arrangement of the test module, the solid-state battery is placed, the first supporting plate and the second supporting plate are arranged to provide pressure for the test module, the bottom electrode column and the top electrode column are arranged to electrify the test module, and then the solid-state battery can be connected with external electrodes after being pressurized, so that the pressurized test is realized.

Description

Technical Field

[0001] This utility model relates to the field of solid-state battery testing equipment, and in particular to a solid-state battery testing mold. Background Technology

[0002] In the field of electrochemical energy storage, lithium-ion batteries (hereinafter referred to as "lithium batteries") have been widely used in various scenarios such as smartphones, laptops, electric vehicles, and energy storage power stations due to their mature manufacturing process, good rate performance, and cost advantages. Currently, mainstream lithium batteries are mainly composed of a positive electrode, a negative electrode, a liquid electrolyte, and a separator. The liquid electrolyte often uses a mixture of carbonate organic solvents and lithium salts, while the separator is used to physically isolate the positive and negative electrodes to prevent short circuits.

[0003] However, as applications increasingly demand higher energy density, safety, and cycle life from energy storage devices, the shortcomings of traditional lithium batteries have become increasingly apparent, becoming a bottleneck restricting their further development: First, their energy density is limited; second, their safety is insufficient, and under extreme conditions such as high temperature, overcharging, short circuits, or mechanical impacts, electrolyte leakage and thermal runaway are likely to occur, leading to fires or even explosions; third, their cycle life is relatively short, and the liquid electrolyte is prone to decomposition and aging during long-term charging and discharging.

[0004] To address the aforementioned issues, all-solid-state batteries, as an emerging energy storage technology, have attracted widespread attention due to their advantages such as high energy density, good safety, and environmental friendliness.

[0005] However, accurate measurement and evaluation of the performance of all-solid-state batteries is crucial in the research and production process. To meet this need, a test mold is required. Summary of the Invention

[0006] The purpose of this application is to solve the problem of solid-state battery safety testing in the prior art and to provide a testing device that simulates the structure of a solid-state battery.

[0007] To achieve the above objectives, this application provides a solid-state battery testing mold, which includes a mold frame, a top electrode post, a bottom electrode post, a top insulating seat, a bottom insulating seat, and a testing module. The mold frame includes a first support plate, a second support plate, a support rod, and a fixing member. The first and second support plates are parallel and correspondingly arranged, and are connected by the support rod. The first support plate is mounted on the first end of the support rod, and the second support plate is slidably connected to the support rod. The fixing member is mounted on the support rod to limit the position of the second support plate. The testing module is disposed within the mold frame and located between the first and second support plates. The testing module includes a cylindrical test shell, an upper cover, a lower cover, and a hollow ceramic column. Both the upper and lower covers have through holes. The hollow ceramic column is placed inside the columnar test shell. The upper cover is connected to the top of the columnar test shell, and the lower cover is connected to the bottom of the columnar test shell. The first end of the top electrode column passes through the through hole of the upper cover and is inserted into the hollow ceramic column. The first end of the bottom electrode column passes through the lower cover and is inserted into the hollow ceramic column. A test space is formed between the first ends of the top and bottom electrode columns. The second end of the bottom electrode column is equipped with a bottom insulating seat, which is placed on the surface of the first support plate. The second end of the top electrode column is equipped with a top insulating seat, which abuts against the lower surface of the second support plate. The second end of the bottom electrode column is provided with a first external connection hole, and the second end of the top electrode column is provided with a second external connection hole.

[0008] The solid-state battery was placed using the test module, supported by the first support plate, and pressure was applied to the test module using the second support plate and fixing components. The test module was powered on using the bottom and top electrode posts. Thus, the solid-state battery was pressurized and connected to external electrodes, thereby enabling pressure testing.

[0009] Optionally, there is one first external hole, which is a threaded hole or a circular plug hole; or, there are two first external holes, one of which is a threaded hole and the other is a circular plug hole; there is one second external hole, which is a threaded hole or a circular plug hole; or, there are two second external holes, one of which is a threaded hole and the other is a circular plug hole.

[0010] The external electrode can be easily connected by setting the first and second external holes as threaded holes or plug holes.

[0011] Optionally, at least two support rods are provided, and the support rods are evenly distributed around the first support plate and the second support plate.

[0012] Optionally, the test module also includes a first sealing ring and a second sealing ring. The first sealing ring is fitted onto the top electrode post and abuts against the top of the hollow ceramic post; the second sealing ring is fitted onto the bottom electrode post, and the outer ring of the second sealing ring is located in the middle of the through hole in the lower cover.

[0013] The first and second sealing rings achieve a seal between the hollow ceramic column and the columnar test shell, preventing the leakage of solid-state battery materials.

[0014] Optionally, the test module also includes a bushing, which is fitted onto the top electrode post and located between the top cover and the top of the cylindrical test housing.

[0015] The support for the top cover and the top of the cylindrical test shell is achieved by the setting of the bushing.

[0016] Optionally, the test module also includes a third sealing ring, which is located inside the lower cover and abuts against the bottom of the hollow ceramic column.

[0017] The third sealing ring further seals the hollow ceramic column and the lower cover.

[0018] Optionally, the sides of the top cover are striped, and the sides of the bottom cover are also striped.

[0019] The striped design allows for easy removal of the top and bottom covers.

[0020] Optionally, the sides of the upper cover are also symmetrically provided with flat surfaces, and the sides of the lower cover are also symmetrically provided with flat surfaces.

[0021] The symmetrically arranged planes allow for convenient clamping of the upper and lower covers, facilitating disassembly using a wrench.

[0022] Optionally, the support rod is provided with a cut surface.

[0023] The support rod is conveniently clamped and rotated by the cutting surface set on it.

[0024] Optionally, the fastener includes a nut, and the support rod is provided with threads that mate with the nut.

[0025] The second support plate is pressurized and locked by the setting of nuts. Attached Figure Description

[0026] To better understand the above and other objects, features, advantages, and functions of this application, reference can be made to the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the drawings are intended to schematically illustrate the preferred embodiments of this application and do not limit the scope of this application in any way; the various components in the drawings are not drawn to scale.

[0027] Figure 1 This is a front view of a solid-state battery test mold according to one embodiment of this application; Figure 2 for Figure 1 Sectional view at point AA.

[0028] Explanation of reference numerals in the attached figures: Mold frame 1; top electrode post 2; bottom electrode post 3; top insulating seat 4; bottom insulating seat 5; test module 6; first support plate 7; second support plate 8; support rod 9; fastener 10; columnar test shell 11; upper cover 12; lower cover 13; hollow ceramic column 14; first external connection hole 15; second external connection hole 16; first sealing ring 17; second sealing ring 18; bushing ring 19; third sealing ring 20; cut surface 21. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Preferred embodiments will be described in detail here, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following preferred embodiments do not represent all embodiments consistent with the present application. Rather, they are merely preferred embodiments of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims. Other ways in which the present application can be implemented based on the preferred embodiments can be conceived by those skilled in the art, and such other ways also fall within the scope of the present application. In the following detailed description, directional terms such as “upper,” “lower,” “inner,” “outer,” “longitudinal,” and “transverse” are used with reference to the directions described in the accompanying drawings. Components of embodiments of the present application may be placed in different orientations; directional terms are for illustrative purposes and not restrictive.

[0030] The purpose of this application is to solve the problem of solid-state battery safety testing in the prior art and to provide a testing device that simulates the structure of a solid-state battery.

[0031] To achieve the above objectives, this application provides a solid-state battery test mold, which includes a mold frame 1, a top electrode post 2, a bottom electrode post 3, a top insulating seat 4, a bottom insulating seat 5, and a test module 6.

[0032] The mold frame 1 includes a first support plate 7, a second support plate 8, a support rod 9, and a fixing member 10. The first support plate 7 and the second support plate 8 are parallel and correspondingly arranged.

[0033] In one implementation, the upper side of the first support plate 7 is provided with a groove for accommodating the test module 6. The test module 6 has a columnar structure, therefore the groove is circular.

[0034] In one implementation, the lower side of the second support plate 8 is also provided with a groove for accommodating the test module 6. This allows the bottom and top of the test module 6 to be effectively limited.

[0035] The first support plate 7 and the second support plate 8 are connected by a support rod 9. The first support plate 7 is installed at the first end of the support rod 9, and the second support plate 8 is slidably connected to the support rod 9. The fixing member 10 is installed on the support rod 9 to limit the position of the second support plate 8.

[0036] In one implementation, the first end of the support rod 9 is provided with a thread, and the first support plate 7 is provided with a threaded hole. The first end of the support rod 9 is screwed onto the first support plate 7 through the threaded hole.

[0037] In one implementation, the second support plate 8 has a through hole with a diameter larger than that of the support rod 9, allowing the second support plate 8 to slide along the length of the support rod 9. A fixing member 10 is installed on the support rod 9 to restrict the upward movement of the second support plate 8, ensuring that during testing, the second support plate 8 and the first support plate 7 can apply stable pressure to the test module 6.

[0038] In one implementation, both the first support plate 7 and the second support plate 8 are made of metal, specifically 304 stainless steel. In another implementation, the support rod 9 is also made of metal, specifically stainless steel.

[0039] The test module 6 is set inside the mold frame 1 and located between the first support plate 7 and the second support plate 8. The test module 6 includes a columnar test shell 11, an upper cover 12, a lower cover 13, and a hollow ceramic column 14. Both the upper cover 12 and the lower cover 13 are provided with through holes.

[0040] In one implementation, the cylindrical test shell 11, the upper cover 12, and the lower cover 13 are all made of insulating plastic. In another implementation, the cylindrical test shell 11, the upper cover 12, and the lower cover 13 are all made of polyetheretherketone (PEEK).

[0041] In one implementation, the through hole is located between the upper cover 12 and the lower cover 13.

[0042] Hollow ceramic column 14 is disposed inside columnar test shell 11, upper cover 12 is connected to the top of columnar test shell 11, and lower cover 13 is connected to the bottom of columnar test shell 11.

[0043] In one implementation, both the upper cover 12 and the lower cover 13 are installed on the top of the cylindrical test housing 11 by means of threaded connection.

[0044] The first end of the top electrode post 2 passes through the through hole of the upper cover 12 and is inserted into the hollow ceramic post 14. The first end of the bottom electrode post 3 passes through the lower cover 13 and is inserted into the hollow ceramic post 14. A test space is formed between the first end of the top electrode post 2 and the first end of the bottom electrode post 3. The second end of the bottom electrode post 3 is equipped with a bottom insulating seat 5, which is placed on the surface of the first support plate. The second end of the top electrode post 2 is equipped with a top insulating seat 4, which abuts against the lower surface of the second support plate 8. The second end of the bottom electrode post 3 is provided with a first external hole 15, and the second end of the top electrode post 2 is provided with a second external hole 16.

[0045] In one implementation, the top insulating seat 4 and the bottom insulating seat 5 can also be made of polyetheretherketone (PEEK).

[0046] In one implementation, the top electrode post 2 includes a base and an extension rod. The base is disc-shaped, and the extension rod is installed in the middle of the base and extends into the ceramic post. A second external connection hole 16 is provided on the side of the base.

[0047] In one implementation, both the top electrode post 2 and the bottom electrode post are made of conductive metal, specifically copper, aluminum, silver, iron, or a metal alloy.

[0048] In one implementation, the top insulating seat 4 is disc-shaped and covers the base of the top electrode post 2. The top insulating seat 4 has a notch or through hole to avoid the second external connection hole 16. This covering method achieves a snap-fit ​​connection between the top insulating seat 4 and the top electrode post 2, facilitating disassembly.

[0049] In one implementation, the bottom electrode post 3 also includes a base and an extension rod. The base is disc-shaped, and the extension rod is installed in the middle of the base and extends into the ceramic post. A first external connection hole 15 is provided on the side of the base.

[0050] In one implementation, the bottom insulating base 5 is disc-shaped and covers the base of the bottom electrode post 3. The bottom insulating base 5 has a notch or through hole to avoid the first external connection hole 15.

[0051] The bottom insulating base 5 and the bottom electrode post 3 are connected by a cover, which facilitates disassembly.

[0052] Furthermore, the solid-state battery is placed through the setting of the test module 6, the test module 6 is supported by the first support plate 7, the test module 6 is pressured through the setting of the second support plate 8 and the fixing part 10, and the test module 6 is powered through the setting of the bottom electrode post 3 and the top electrode post 2. Thus, the solid-state battery is pressurized and can be connected to the external electrode, thereby realizing the pressure test.

[0053] In one implementation, there is one first external hole 15, which is either a threaded hole or a circular insertion hole; or, there are two first external holes 15, one of which is a threaded hole and the other is a circular insertion hole.

[0054] When the first external connection hole 15 is a threaded hole, it can be connected to an external electrode with threads. When the first external connection hole 15 is a circular insertion hole, it can be connected to an external electrode with elasticity. Having both threaded holes and circular insertion holes further improves the compatibility of the external electrodes of the test module 6, allowing it to adapt to different electrode plug specifications. When both threaded holes and circular insertion holes are provided, these two holes are symmetrically located at the second end of the bottom electrode post 3.

[0055] In one implementation, there is one second external hole 16, which is either a threaded hole or a circular insertion hole; or, there are two second external holes 16, one of which is a threaded hole and the other is a circular insertion hole.

[0056] When the second external connection hole 16 is a threaded hole, it can be connected to an external electrode with threads. When the second external connection hole 16 is a circular insertion hole, it can be connected to an external electrode with elasticity. Having both threaded and circular insertion holes further improves the compatibility of the external electrodes of the test module 6, accommodating electrode plugs of different specifications. When both threaded and circular insertion holes are provided, these two holes are symmetrically located at the second end of the top electrode post 2.

[0057] The external electrode can be conveniently connected by setting the first external hole 15 and the second external hole 16 as threaded holes or plug holes.

[0058] In one implementation, at least two support rods 9 are provided, and the support rods 9 are evenly distributed around the first support plate 7 and the second support plate 8.

[0059] In one implementation, three support connecting rods are provided. Holes for connecting the support connecting rods are evenly provided on the edges of the first support plate 7 and the second support plate 8. The distance between the sidewalls of any two connecting rods is greater than the diameter of the test module 6, so that the test module 6 can be inserted between the first support plate 7 and the second support plate 8.

[0060] In one implementation, the test module 6 further includes a first sealing ring 17 and a second sealing ring 18. The first sealing ring 17 is fitted on the top electrode post 2 and abuts against the top of the hollow ceramic post 14. The second sealing ring 18 is fitted on the bottom electrode post 3, and the outer ring of the second sealing ring 18 is located in the middle of the through hole of the lower cover 13.

[0061] In one implementation, the first sealing ring 17 is directly fitted onto the top electrode post 2. The first sealing ring 17 achieves a seal between the hollow ceramic post 14 and the upper cover 12.

[0062] In one implementation, an annular groove is provided on the bottom electrode post 3, and a second sealing ring 18 is fitted inside the annular groove. The second ceramic post achieves a seal between the lower cover 13 and the hollow ceramic post 14.

[0063] The first sealing ring 17 and the second sealing ring 18 achieve a seal between the hollow ceramic column 14 and the columnar test shell 11, preventing the leakage of solid-state battery materials.

[0064] In one implementation, the test module 6 further includes a bushing 19, which is fitted onto the top electrode post 2 and is located between the top cover 12 and the top of the cylindrical test shell 11.

[0065] In one implementation, the bushing 19 is positioned above the first sealing ring 17. When the top cover 12 is rotated and tightened to the top of the cylindrical test shell 11, the bushing 19 presses the first sealing ring 17 against the hollow ceramic column 14.

[0066] The support for the top of the cover 12 and the cylindrical test shell 11 is achieved by the setting of the bushing 19.

[0067] In one implementation, the test module 6 further includes a third sealing ring 20, which is disposed inside the lower cover 13 and abuts against the bottom of the hollow ceramic column 14.

[0068] In one implementation, the first sealing ring, the second sealing ring, and the third sealing ring are all made of rubber.

[0069] In one implementation, the lower cover 13 has a groove for accommodating the third sealing ring 20. The inner diameter of the third sealing ring 20 is larger than the diameter of the hollow portion of the hollow ceramic column 14, but smaller than the outer diameter of the hollow ceramic column 14.

[0070] The third sealing ring 20 further ensures a seal between the lower cover 13 and the hollow ceramic column 14. In one implementation, the upper cover 12 has stripes on its side, and the lower cover 13 also has stripes on its side.

[0071] The striped design increases contact friction, allowing for the screwing and unscrewing of the upper cover 12 and lower cover 13.

[0072] In one implementation, the stripes are set vertically.

[0073] In one implementation, the sides of the upper cover 12 are symmetrically provided with planes, and the sides of the lower cover 13 are also symmetrically provided with planes. The planes on the sidewalls of the upper and lower covers facilitate clamping.

[0074] The symmetrically arranged planes enable convenient clamping of the upper cover 12 and the lower cover 13, facilitating disassembly using a wrench.

[0075] In one implementation, the support rod 9 is provided with a cut surface 21.

[0076] The cutting surface 21 on the support rod 9 enables convenient clamping and rotation of the support rod 9. For example, when clamping with a wrench, the cutting surface and the wrench can make surface contact, which facilitates the application of force.

[0077] In one implementation, the fastener 10 includes a nut, and the support rod 9 has threads that mate with the nut. To further stabilize the fastener and limit the second support rod, the fastener may also include an elastic washer.

[0078] The second support plate 8 is pressurized and locked by the setting of the nut.

[0079] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application filed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0080] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims. The above is merely illustrative of embodiments of this application and is not intended to limit this application. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A solid-state battery testing mold, characterized in that, The solid-state battery test mold includes a mold frame, a top electrode post, a bottom electrode post, a top insulating base, a bottom insulating base, and a test module; The mold frame includes a first support plate, a second support plate, a support rod, and a fixing component. The first support plate and the second support plate are parallel and correspondingly arranged. The first support plate and the second support plate are connected by the support rod. The first support plate is installed at the first end of the support rod, and the second support plate is slidably connected to the support rod. The fixing member is installed on the support rod to limit the position of the second support plate. The test module is disposed within the mold frame and located between the first support plate and the second support plate. The test module includes a cylindrical test shell, an upper cover, a lower cover, and a hollow ceramic column. Both the upper cover and the lower cover are provided with through holes. The hollow ceramic column is disposed inside the columnar test shell, the upper cover is connected to the top of the columnar test shell, and the lower cover is connected to the bottom of the columnar test shell. The first end of the top electrode post passes through the through hole of the upper cover and is inserted into the hollow ceramic post. The first end of the bottom electrode post passes through the lower cover and is inserted into the hollow ceramic post. A test space is formed between the first ends of the top electrode post and the first ends of the bottom electrode post. A bottom insulating seat is installed at the second end of the bottom electrode post, and the bottom insulating seat is placed on the surface of the first support plate. A top insulating seat is installed at the second end of the top electrode post, and the top insulating seat abuts against the lower surface of the second support plate. The second end of the bottom electrode post is provided with a first external connection hole, and the second end of the top electrode post is provided with a second external connection hole.

2. The solid-state battery testing mold according to claim 1, characterized in that, There is one first external hole, which is either a threaded hole or a circular insertion hole; or... There are two first external holes, one of which is a threaded hole and the other is a circular plug hole; There is one second external hole, which is either a threaded hole or a circular insertion hole; or... There are two second external holes, one of which is a threaded hole and the other is a circular plug hole.

3. The solid-state battery testing mold according to claim 1, characterized in that, At least two support rods are provided, and the support rods are evenly distributed around the periphery of the first support plate and the second support plate.

4. The solid-state battery testing mold according to claim 1, characterized in that, The test module also includes a first sealing ring and a second sealing ring. The first sealing ring is fitted onto the top electrode post and abuts against the top of the hollow ceramic post; the second sealing ring is fitted onto the bottom electrode post, and the outer ring of the second sealing ring is located in the middle of the through hole of the lower cover.

5. The solid-state battery testing mold according to claim 1, characterized in that, The test module also includes a bushing, which is sleeved on the top electrode post and located between the top cover and the top of the columnar test shell.

6. The solid-state battery testing mold according to claim 1, characterized in that, The test module also includes a third sealing ring, which is disposed on the inner side of the lower cover and abuts against the bottom of the hollow ceramic column.

7. The solid-state battery testing mold according to claim 1, characterized in that, The upper cover has stripes on its side, and the lower cover also has stripes on its side.

8. The solid-state battery testing mold according to claim 1, characterized in that, The upper cover also has symmetrically arranged planes on its sides, and the lower cover also has symmetrically arranged planes on its sides.

9. The solid-state battery testing mold according to claim 1, characterized in that, The support rod has a cut surface.

10. The solid-state battery testing mold according to claim 9, characterized in that, The fastener includes a nut, and the support rod is provided with threads that mate with the nut.

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