A solid state battery testing device

Abstract

The application provides a solid-state battery testing device, which comprises a testing mold core and a testing rack; the testing rack is used for applying pressure to the testing mold core; the testing mold core comprises a sealing column, a first electrode column, a second electrode column, a third electrode column and a sleeve; the sealing column is provided with a first through hole in the center in an axial direction; the first end of the first electrode column and the first end of the second electrode column are oppositely inserted into the first through hole; the sleeve is sleeved on the first end of the second electrode column and is inserted into the first through hole along with the second electrode column; the sleeve is further provided with a second through hole in the axial direction; and the third electrode column is installed in the second through hole. The positioning of the second electrode column and the third electrode column is realized through the arrangement of the sealing column and the sleeve; the sealing and mutual isolation among the first electrode, the second electrode column and the third electrode column are realized through the arrangement of the sealing column and the sleeve; the sealing property and the safety of the solid-state battery testing device are improved; and the multi-electrode detection of the solid-state battery is realized through the arrangement of the three electrode columns.

Description

Technical Field

[0001] This application relates to the field of solid-state battery testing technology, and in particular to a solid-state battery testing device. Background Technology

[0002] Solid-state batteries are becoming the core direction of next-generation energy storage due to their high energy density and high safety. Stress testing of solid-state batteries is an essential step in their research and development and production. By simulating the structure and working principle of solid-state batteries, the electrochemical performance of solid-state batteries with different electrolyte materials under different initial pressures is tested and studied, and the pressure changes during charging and discharging are recorded in real time.

[0003] Existing dual-electrode test molds can only monitor the total voltage and total impedance of the battery, but cannot separate the interfacial impedance contribution between the positive or negative electrode and the electrolyte, making failure tracing difficult. Existing dual-electrode molds have constrained the efficiency of solid-state battery R&D. Developing test molds that can accurately separate single-electrode signals and ensure testing safety has become an urgent need in this field. Summary of the Invention

[0004] The purpose of this application is to provide a solid-state battery testing device to solve the problems in the prior art where dual-electrode testing molds cannot perform accurate electrode testing and have poor sealing performance.

[0005] This application provides a solid-state battery testing device, which includes a test mold and a test frame. The test mold is disposed within the test frame, which applies pressure to the test mold. The test mold includes a sealing post, a first electrode post, a second electrode post, a third electrode post, and a sleeve. The sealing post has an axially arranged first through hole at its center. The first ends of the first electrode post and the first ends of the second electrode post are inserted into the first through hole relative to each other. The sleeve is fitted onto the first end of the second electrode post and is inserted into the first through hole along with the second electrode post. The sleeve also has a second through hole axially arranged, and the third electrode post is installed in the second through hole. Both the second and third electrode posts are connected to the first electrode post.

[0006] The sealing column enables the containment of solid-state battery test materials and the positioning of the first electrode. The sleeve enables the positioning of the second and third electrode columns. The sealing column and sleeve also achieve sealing and mutual isolation between the first, second, and third electrode columns, increasing the sealing performance and safety of the solid-state battery test device. The arrangement of the first, second, and third electrode columns enables multi-electrode testing of solid-state batteries.

[0007] Optionally, the outer diameter of the sleeve is less than or equal to the diameter of the first end of the first electrode post, and the sleeve and the first electrode post are coaxially disposed inside the sealing post; the sleeve is provided with a first eccentric hole, and the first end of the second electrode post is inserted into the first eccentric hole on the sleeve; the second through hole is disposed parallel to the first eccentric hole inside the sleeve.

[0008] The first electrode post ensures stable support of solid-state battery test materials, while the sleeve ensures precise alignment of the second and third electrode posts with the first electrode post.

[0009] Optionally, the second through hole is a threaded hole, and the third electrode post is provided with external threads. The third electrode post is installed in the second through hole through a threaded connection.

[0010] The third electrode post was stably installed by means of a threaded connection, which ensured that the third electrode post would not move due to pressure during the test and cause contact failure.

[0011] Optionally, the test mold core includes a sealing cap with a third through hole in the center for the sleeve to pass through, and the sealing cap is screwed onto the top of the sealing post.

[0012] The sealing cap further seals the top of the sealing column.

[0013] Optionally, the test mold core also includes a first sealing ring and a support ring, which are disposed between the sealing cover and the sealing post, and both the first sealing ring and the support ring are fitted onto the outside of the sleeve; the first sealing ring is disposed below the support ring.

[0014] The support ring provides support for the first sealing ring, and the sealing cap presses the support ring onto the first sealing ring, thereby squeezing the first sealing ring against the top of the sealing column and sealing the top of the sealing column.

[0015] Optionally, the test mold core also includes a second sealing ring, which is fitted onto the outer wall of the first end of the first electrode post.

[0016] The addition of a second sealing ring further seals the bottom of the sealing column, increasing the airtightness of the solid-state battery testing device.

[0017] Optionally, the first end of the first electrode post has a stepped structure, and the sealing post has a groove that matches the stepped structure to accommodate the stepped structure, which is used to support the sealing post.

[0018] The stepped structure provides support for the sealing column and further enhances the seal at the bottom of the sealing column.

[0019] Optionally, the second end of the first electrode post and the second end of the second electrode post are both disk-shaped structures; a first electrode hole is opened on the second end of the first electrode post, and a second electrode hole is opened on the second end of the second electrode post.

[0020] Electrical connection with the outside is achieved by setting the first electrode hole and the second electrode hole, and more stable contact with the test fixture is achieved by setting the second end of the first electrode post and the second end of the second electrode post to be of the disk-shaped structure.

[0021] Optionally, the test mold core further includes: a first insulating cover covering the second end of the first electrode post, the first insulating cover having a notch at a position corresponding to the first electrode hole; and a second insulating cover covering the second end of the second electrode post, the second insulating cover having a notch at a position corresponding to the second electrode hole.

[0022] The installation of the first and second insulating covers ensures insulated contact between the first and second electrode posts and the test fixture.

[0023] Optionally, the test fixture includes a support plate and a pressure plate, with an adjustment element between the support plate and the pressure plate for adjusting the distance between them.

[0024] The support plate provides support for the test mold core, while the pressure plate and other components allow for the application and adjustment of pressure on the test frame.

[0025] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 A perspective view of the solid-state battery testing apparatus provided in this application; Figure 2 Another perspective view of the solid-state battery testing device provided in the embodiments of this application.

[0028] icon: 1. Test frame; 2. Test mold core; 3. Sealing column; 4. First electrode column; 5. Second electrode column; 6. Sleeve; 7. Second through hole; 8. Sealing cover; 9. First electrode hole; 10. Second electrode hole; 11. First insulating cover; 12. Second insulating cover; 13. Support plate; 14. Pressure plate; 15. Adjusting component. Detailed Implementation

[0029] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not 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 this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0033] The present application will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0034] The specific structure is as follows: Figure 1 and Figure 2 As shown.

[0035] This embodiment provides a solid-state battery testing device to solve the problems in the prior art where dual-electrode testing molds cannot perform accurate electrode testing and have poor sealing performance.

[0036] This application provides a solid-state battery testing device, which includes a test mold core 2 and a test frame 1. The test mold core 2 is disposed inside the test frame 1, and the test frame 1 is used to apply pressure to the test mold core 2. The test mold core 2 includes a sealing post 3, a first electrode post 4, a second electrode post 5, a third electrode post, and a sleeve 6. The sealing post 3 has an axially arranged first through hole at its center. The first end of the first electrode post 4 and the first end of the second electrode post are inserted into the first through hole relative to each other. The sleeve 6 is fitted onto the first end of the second electrode post 5 and is inserted into the first through hole along with the second electrode post. The sleeve 6 also has a second through hole 7 axially arranged, and the third electrode post is installed in the second through hole 7. Both the second electrode post 5 and the third electrode post are connected to the first electrode post 4.

[0037] In one implementation, the test frame 1 can be a structure capable of applying pressure, which includes at least a plate or block structure that supports the test model from the bottom, and a force-applying component that applies pressure to the test mold core 2 from the other side, such as a gravity block or a pressure plate 14. The position of the pressure plate 14 can be adjusted to accommodate the clamping of the test mold core 2.

[0038] The sealing column 3 enables the containment of solid-state battery test materials and the positioning of the first electrode. The sleeve 6 enables the positioning of the second and third electrode columns. The sealing column 3 and the sleeve 6 enable the sealing and mutual isolation between the first, second, and third electrode columns, thereby increasing the sealing performance and safety of the solid-state battery test device. The arrangement of the first, second, and third electrode columns enables multi-electrode detection of solid-state batteries.

[0039] In one alternative technical solution, the outer diameter of the sleeve 6 is less than or equal to the diameter of the first end of the first electrode post 4, and the sleeve 6 and the first electrode post 4 are coaxially disposed inside the sealing post 3; the sleeve 6 is provided with a first eccentric hole, and the first end of the second electrode post is inserted into the first eccentric hole on the sleeve 6; the second through hole 7 is disposed parallel to the first eccentric hole inside the sleeve 6.

[0040] By connecting the sleeve 6 and the first electrode post 4, the solid-state battery test material is placed between the sleeve 6 and the first electrode. The sleeve 6 and the first electrode post 4 are used to complete the holding and sealing of the test material, which facilitates testing.

[0041] The first electrode post 4 enables stable support of solid-state battery test materials, and the sleeve 6 enables precise alignment of the second and third electrode posts with the first electrode.

[0042] In one implementation, sleeve 6 is made of PEEK (polyetheretherketone).

[0043] In one alternative technical solution, the second through hole 7 is a threaded hole, and the third electrode post is provided with external threads. The third electrode post is installed in the second through hole 7 through a threaded connection.

[0044] In one implementation, the length of the third electrode post is greater than the length of the sleeve 6.

[0045] The third electrode post was stably installed by means of a threaded connection, which ensured that the third electrode post would not move due to pressure during the test and cause contact failure.

[0046] In one alternative technical solution, the test mold core 2 includes a sealing cover 8, the sealing cover 8 having a third through hole in the center for the sleeve 6 to pass through, and the sealing cover 8 being screwed onto the top of the sealing post 3.

[0047] In one implementation, the third through hole on the sealing cover 8 is tightly fitted with the outer wall of the sleeve 6.

[0048] In one implementation, both the sealing cap 8 and the sealing post 3 are made of PEEK material.

[0049] The sealing cap 8 provides a further seal at the top of the sealing column 3.

[0050] In one alternative technical solution, the test mold core 2 further includes a first sealing ring and a support ring, which are disposed between the sealing cover 8 and the sealing post 3, and both the first sealing ring and the support ring are fitted onto the outside of the sleeve 6; the first sealing ring is disposed below the support ring.

[0051] The support ring provides support for the first sealing ring, and the sealing cap 8 presses the support ring onto the first sealing ring, thereby squeezing the first sealing ring against the top of the sealing column 3 and sealing the top of the sealing column 3.

[0052] In one implementation, in order to achieve a good seal at the top of the sealing post 3, a groove for limiting the first sealing ring can also be provided on the top of the sealing post 3, and the thickness of the first sealing ring is greater than the depth of the groove.

[0053] In one alternative technical solution, the test mold core 2 further includes a second sealing ring, which is sleeved on the outer wall of the first end of the first electrode post 4.

[0054] The second sealing ring further seals the bottom of the sealing column 3, increasing the airtightness of the solid-state battery testing device.

[0055] In one alternative technical solution, the first end of the first electrode post is a stepped structure, and the sealing post 3 is provided with a stepped groove that matches the stepped structure to accommodate the stepped structure. The stepped structure is used to support the sealing post 3.

[0056] The stepped structure provides support for the sealing column 3 and further enhances the seal at the bottom of the sealing column 3.

[0057] In one alternative technical solution, the second end of the first electrode post 4 and the second end of the second electrode post 5 are both disc-shaped structures; a first electrode hole 9 is provided on the second end of the first electrode post 4, and a second electrode hole 10 is provided on the second end of the second electrode post 5.

[0058] Electrical connection with the outside is achieved by setting the first electrode hole 9 and the second electrode hole 10. The fact that the second end of the first electrode post 4 and the second end of the second electrode post 5 are both disc-shaped structures achieves more stable contact with the test frame 1.

[0059] In one alternative technical solution, the test mold core 2 further includes: a first insulating cover 11 covering the second end of the first electrode post 4, the first insulating cover 11 having a notch at a position corresponding to the first electrode hole 9; and a second insulating cover 12 covering the second end of the second electrode post 5, the second insulating cover 12 having a notch at a position corresponding to the second electrode hole 10.

[0060] In one implementation, both the first insulating cover 11 and the second insulating cover 12 can be made of PEEK material.

[0061] The first insulating cover 11 and the second insulating cover 12 are provided to achieve insulating contact between the first electrode post 4 and the second electrode post 5 and the test frame 1.

[0062] In one alternative technical solution, the test frame 1 includes a support plate 13 and a pressure plate 14, and an adjusting member 15 is provided between the support plate 13 and the pressure plate 14 for adjusting the distance between the support plate 13 and the pressure plate 14.

[0063] In one implementation, the support plate and pressure plate are stainless steel discs. The support plate has threaded holes, and the pressure plate has through holes. The adjusting components include studs and lock nuts. The first end of the stud is installed in the threaded hole on the support plate via a threaded connection, and the second end of the stud passes through the through hole on the pressure plate. A lock nut is installed on the second end of the stud to adjust and limit the position of the pressure plate on the stud.

[0064] In one implementation, the support plate and the pressure plate are the same size and are correspondingly set, with three studs evenly distributed around the edges of the support plate and the pressure plate.

[0065] The support plate 13 provides support for the test mold core 2, and the pressure plate 14 and the pressure plate 15 provide pressure application and adjustment for the test frame 1.

[0066] This embodiment provides a solid-state battery testing device, including the aforementioned first electrode post 4, second electrode post 5, and third electrode post, as well as a sleeve 6 and a sealing post 3 that cooperate with them. Thus, the technical advantages and effects achieved by the above device include performing electrode testing on solid-state batteries, while ensuring the sealing and accuracy of the test.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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. Such 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.

Claims

1. A solid-state battery testing device, characterized in that, The solid-state battery testing device includes a test mold and a test frame; The test mold is disposed within the test frame, and the test frame is used to apply pressure to the test mold. The test mold core includes a sealing post, a first electrode post, a second electrode post, a third electrode post, and a sleeve; The sealing post has a first through hole arranged axially at its center, and the first ends of the first electrode post and the first ends of the second electrode post are inserted into the first through hole. The sleeve is fitted onto the first end of the second electrode post and inserted into the first through hole along with the second electrode post. The sleeve is also provided with a second through hole in the axial direction, and the third electrode post is installed in the second through hole; Both the second electrode post and the third electrode post are connected to the first electrode post.

2. The solid-state battery testing apparatus according to claim 1, characterized in that, The outer diameter of the sleeve is less than or equal to the diameter of the first end of the first electrode post, and the sleeve is coaxially disposed inside the sealing post with the first electrode post. The sleeve is provided with a first eccentric hole, and the first end of the second electrode post is inserted into the first eccentric hole on the sleeve; the second through hole is arranged parallel to the first eccentric hole inside the sleeve.

3. The solid-state battery testing apparatus according to claim 1, characterized in that, The second through hole is a threaded hole, and the third electrode post is provided with external threads. The third electrode post is installed in the second through hole through a threaded connection.

4. The solid-state battery testing apparatus according to claim 1, characterized in that, The test mold core includes a sealing cap. The sealing cap has a third through hole in the center for the sleeve to pass through, and the sealing cap is screwed onto the top of the sealing column.

5. The solid-state battery testing apparatus according to claim 4, characterized in that, The test mold core also includes a first sealing ring and a support ring, the first sealing ring and the support ring are disposed between the sealing cover and the sealing post, and the first sealing ring and the support ring are both fitted on the outside of the sleeve; The first sealing ring is located below the support ring.

6. The solid-state battery testing apparatus according to claim 1, characterized in that, The test mold core also includes a second sealing ring, which is sleeved on the outer wall of the first end of the first electrode post.

7. The solid-state battery testing apparatus according to claim 6, characterized in that, The first end of the first electrode post has a stepped structure, and the sealing post is provided with a stepped groove that matches the stepped structure to accommodate the stepped structure. The stepped structure is used to support the sealing post.

8. The solid-state battery testing apparatus according to claim 6, characterized in that, Both the second end of the first electrode post and the second end of the second electrode post are disk-shaped structures. A first electrode hole is formed on the second end of the first electrode post, and a second electrode hole is formed on the second end of the second electrode post.

9. The solid-state battery testing apparatus according to claim 8, characterized in that, The test mold core also includes: A first insulating cover is disposed over the second end of the first electrode post, and a notch is provided on the first insulating cover at a position corresponding to the hole of the first electrode; and... A second insulating cover is provided on the second end of the second electrode post, and a notch is provided on the second insulating cover at the position corresponding to the second electrode hole.

10. The solid-state battery testing apparatus according to claim 1, characterized in that, The test frame includes a support plate and a pressure plate, and an adjusting member is provided between the support plate and the pressure plate for adjusting the distance between the support plate and the pressure plate.

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