Solid-state lithium battery test fixture

Abstract

The utility model discloses a solid-state lithium battery test fixture. The solid-state lithium battery test fixture comprises a clamping assembly, a shell assembly and two conductive poles in contact with the clamping assembly, the clamping assembly comprises a clamping base, a copper current collector clamped on the clamping base and a titanium current collector arranged opposite to the copper current collector, a battery is located between the copper current collector and the titanium current collector, and the two sides of the battery are attached to the copper current collector and the titanium current collector respectively; the shell assembly comprises a first shell and a second shell, and the clamping assembly is detachably arranged on the first shell and the second shell. According to the scheme, the battery is fixed through the clamping assembly, then the end face of the battery is flattened, the treated end face of the battery is flush with the end face of the copper current collector and the end face of the titanium current collector, the battery does not need to be reinstalled after being flush, battery dislocation is avoided, and the clamping assembly is integrally installed in the shell assembly, so that the clamping assembly is convenient to assemble and disassemble. After installation, the top end faces of the titanium current collector, the copper current collector, the battery, the shell I and the shell II are flush, so that the accuracy of a test result is ensured.

Description

A solid-state lithium battery test fixture Technical Field

[0001] This utility model relates to the field of lithium battery testing, and more specifically, to a solid-state lithium battery testing fixture. Background Technology

[0002] With the rapid development of energy storage technologies, especially the application of new battery technologies such as lithium-ion batteries, sodium-ion batteries, and solid-state batteries, improving battery performance, lifespan, and safety has become a current research hotspot. In the development and optimization of batteries, changes in the surface properties, interfacial behavior, and microstructure of materials play a crucial role. Traditional testing methods often cannot provide sufficient spatial resolution or real-time monitoring information on changes in the internal structure of the battery. To address this issue, atomic force microscopy (AFM), as a high-resolution surface characterization tool, has gradually become an important means in battery research.

[0003] Atomic force microscopes can accurately measure the microscopic morphology of electrode surfaces, including roughness, pore structure, and surface cracks. They can also apply minute forces to samples through their atomic force probes to measure the mechanical properties of battery materials, such as hardness and elastic modulus.

[0004] Previously disclosed AFM test cells lacked a secondary transfer mechanism. After battery assembly, AFM testing was easily affected by uneven electrode interfaces on the sample. Patent No. 202020630570.X discloses a variable-temperature solid-state battery testing device for atomic force microscopy. However, this device cannot place the sample into an ion beam polisher to smooth its surface after clamping it, resulting in a very rough sample surface that affects test results. Furthermore, existing battery fixing structures, if the battery test surface is treated, are prone to misalignment during the process of installing the treated battery into the in-situ AFM test cell. Summary of the Invention

[0005] The purpose of this utility model is to provide a solid-state lithium battery testing fixture to solve the technical problems existing in the background art.

[0006] This utility model provides a solid-state lithium battery test fixture, including a clamping assembly, a housing assembly, and two conductive electrode posts in contact with the clamping assembly;

[0007] The clamping assembly includes a clamping base, a copper current collector snapped onto the clamping base, and a titanium current collector disposed opposite to the copper current collector. The battery is located between the copper current collector and the titanium current collector, and its two sides are respectively attached to the two.

[0008] The housing assembly includes a housing one and a housing two. The clamping assembly is detachably disposed in the housing one and the housing two. The two conductive electrode posts pass through the housing one and the housing two respectively and are in contact with the copper current collector and the titanium current collector respectively.

[0009] In a preferred embodiment, the clamping base is provided with a slot adapted to the cross-sectional size of the copper current collector, and the clamping base is provided with a clearance groove for the conductive electrode post to pass through.

[0010] In a preferred embodiment, the titanium current collector is fixed to the clamping base by a bolt assembly, and the end face of the titanium current collector is in contact with the end face of the clamping base. The width of the slot is greater than the width of the copper current collector, and a slot for placing the battery is formed between the titanium current collector and the copper current collector.

[0011] In a preferred embodiment, the top surfaces of the titanium current collector, copper current collector, battery, housing one, and housing two are flush.

[0012] In a preferred embodiment, the first housing is provided with a mounting groove 1 adapted to the size and shape of the titanium current collector, and the second housing is provided with a mounting groove 2 adapted to the size and shape of the clamping base.

[0013] In a preferred embodiment, both of the conductive electrode posts are provided with threaded sections, and both housing one and housing two are provided with threaded through holes adapted to the threaded sections.

[0014] In a preferred embodiment, the housing one and the housing two are fixed together by a bolt assembly two.

[0015] In a preferred embodiment, both the first housing and the second housing are fitted with magnetic bases at their bottoms.

[0016] The beneficial effects of this utility model's technical solution are:

[0017] This solution uses a clamping assembly to fix the battery in place, and then flattens the battery end face. The flattened battery end face is flush with the copper and titanium current collector end faces. After the flattening process, there is no need to reinstall the battery, thus avoiding battery misalignment. The clamping assembly is installed as a whole in the housing assembly. After installation, the titanium current collector, copper current collector, battery, and the top end faces of housing one and housing two are flush, thereby ensuring the accuracy of the test results. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 is a structural disassembly diagram of this utility model.

[0020] Figure 3 is a structural disassembly diagram of this utility model from another perspective.

[0021] Figure 4 is a disassembled diagram of the clamping component structure of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1 Clamping assembly, 2 Clamping base, 3 Copper current collector, 4 Titanium current collector, 5 Slot, 6 Relief slot, 7 Empty slot, 8 Bolt assembly one, 9 Housing assembly, 10 Housing one, 11 Housing two, 12 Mounting slot one, 13 Mounting slot two, 14 Conductive electrode post, 15 Threaded section, 16 Threaded through hole, 17 Bolt assembly two, 18 Magnetic base. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0024] As shown in Figures 1-4, this utility model provides a solid-state lithium battery testing fixture, including a clamping assembly 1, a housing assembly 9, and two conductive electrode posts 14 in contact with the clamping assembly 1. The clamping assembly 1 is used to clamp and fix the solid-state lithium battery. The clamping assembly 1 is then polished flat in an ion beam (or other sample preparation equipment) to make the end face of the lithium battery flush. Next, the fixture is placed into the housing assembly 9 and fixed, and the two conductive electrode posts 14 are installed. After installation, the battery surface condition is tested in real time by scanning the probe of an atomic force microscope to study the changes in the lithium battery during use.

[0025] The clamping assembly 1 includes a clamping base 2, a copper current collector 3 snapped onto the clamping base 2, and a titanium current collector 4 disposed opposite to the copper current collector 3. The lithium battery is located between the copper current collector 3 and the titanium current collector 4, with its two sides respectively in contact with them. The titanium current collector 4 and the copper current collector 3 are in contact with the battery, and two conductive electrode posts 14 are in contact with the titanium current collector 4 and the copper current collector 3. The conductive electrode posts 14 are connected to an external power source, thereby realizing the conduction of current. The two conductive electrode posts 14 are the positive electrode post and the negative electrode post, respectively. After the battery is fixed in place by the clamping assembly 1, the end face of the battery is slightly higher than the end faces of the titanium current collector 4 and the copper current collector 3. Then, an ion beam is emitted from the titanium current collector 4 to process the end face of the battery until the end face of the battery is flush with the end faces of the titanium current collector 4 and the copper current collector 3. Processing from the titanium current collector 4 side is because titanium alloy has higher strength, is less prone to damage, and can be reused.

[0026] The housing assembly 9 includes a first housing 10 and a second housing 11. The clamping assembly 1 is detachably disposed on the first housing 10 and the second housing 11. The two conductive electrode posts 14 pass through the first housing 10 and the second housing 11 respectively, and are in contact with the copper current collector 3 and the titanium current collector 4 respectively. After the first housing 10 and the second housing 11 fix the clamping assembly 1, the test is performed using an atomic force microscope. Magnetic bases 18 are inserted into the bottom of both the first housing 10 and the second housing 11. The magnetic bases 18 are adsorbed and fixed under the atomic force microscope, thereby ensuring that the housing assembly 9 will not shift during the test.

[0027] This solution uses clamping component 1 to fix the battery in place, and then flattens the end face of the battery. After the flattening, the end face of the battery is flush with the end faces of the copper current collector 3 and the titanium current collector 4. After the flattening, there is no need to reinstall the battery, thus avoiding misalignment between the battery and the copper current collector 3 and the titanium current collector 4. The clamping component is installed in the housing component as a whole. After installation, the top end faces of the titanium current collector 4, the copper current collector 3, the battery, housing one 10 and housing two 11 are flush, thereby ensuring the accuracy of the test results.

[0028] The clamping base 2 is provided with a slot 5 adapted to the cross-sectional size of the copper current collector 3, and a clearance groove 6 is provided through the clamping base 2 for the conductive electrode post 14 to pass through. The titanium current collector 4 is fixed to the clamping base 2 by a bolt assembly 8, and the end face of the titanium current collector 4 is in contact with the end face of the clamping base 2. The width of the slot 5 is greater than the width of the copper current collector 3, and a cavity 7 for battery placement is formed between the titanium current collector 4 and the copper current collector 3.

[0029] In the above scheme, the copper current collector 3 is first placed in the slot 5, then the battery is placed in the empty slot 7, and then the titanium current collector 4 and the clamping base 2 are fastened by the bolt assembly 8 to achieve the fixed installation of the battery, while ensuring that the two sides of the battery are in contact with the titanium current collector 4 and the copper current collector 3 respectively.

[0030] The first housing 10 has a mounting groove 12 adapted to the size and shape of the titanium current collector 4, and the second housing 11 has a mounting groove 13 adapted to the size and shape of the clamping base 2. Both conductive electrode posts 14 are provided with threaded sections 15, and both the first housing 10 and the second housing 11 are provided with threaded through holes 16 adapted to these threaded sections 15. The first housing 10 and the second housing 11 are fixed together by bolt assembly 17.

[0031] In the above scheme, when the flattened clamping component 1 is fixed, the titanium current collector 4 side is first installed and connected to the mounting groove 12 on the housing 10, and then the mounting groove on the housing 21 is aligned with the clamping base 2 and installed and connected, so that the housing 10 and the housing 21 are included outside the clamping component 1, realizing the installation and support of the clamping component 1, and ensuring that the battery is placed more stably and smoothly during the testing process.

[0032] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A solid-state lithium battery testing fixture, characterized in that: The device includes a clamping assembly, a housing assembly, and two conductive electrode posts in contact with the clamping assembly. The clamping assembly includes a clamping base, a copper current collector snapped onto the clamping base, and a titanium current collector disposed opposite to the copper current collector. The battery is located between the copper current collector and the titanium current collector, and its two sides are respectively attached to both of them. The housing assembly includes a first housing and a second housing. The clamping assembly is detachably disposed in the first housing and the second housing. The two conductive electrode posts are respectively disposed through the first housing and the second housing, and respectively contact the copper current collector and the titanium current collector.

2. The solid-state lithium battery testing fixture according to claim 1, characterized in that: The clamping base is provided with a slot adapted to the cross-sectional size of the copper current collector, and the clamping base is provided with a clearance groove for the conductive electrode post to pass through.

3. A solid-state lithium battery testing fixture according to claim 2, characterized in that: The titanium current collector is fixed to the clamping base by a bolt assembly, and the end face of the titanium current collector is in contact with the end face of the clamping base. The width of the slot is greater than the width of the copper current collector, and a slot for placing the battery is formed between the titanium current collector and the copper current collector.

4. A solid-state lithium battery testing fixture according to claim 1, characterized in that: The top surfaces of the titanium current collector, copper current collector, battery, housing one, and housing two are flush.

5. A solid-state lithium battery testing fixture according to claim 1, characterized in that: The first housing is provided with a mounting groove 1 that is adapted to the size and shape of the titanium current collector, and the second housing is provided with a mounting groove 2 that is adapted to the size and shape of the clamping base.

6. A solid-state lithium battery testing fixture according to claim 1, characterized in that: Both of the conductive electrode posts are provided with threaded sections, and both housing one and housing two are provided with threaded through holes adapted to the threaded sections.

7. A solid-state lithium battery testing fixture according to claim 1, characterized in that: The first housing and the second housing are fixed together by a bolt assembly.

8. A solid-state lithium battery testing fixture according to claim 1, characterized in that: Both the first and second housings have magnetic bases inserted into their bottoms.

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