Solid-state battery mold suitable for X-CT (X-Computed Tomography) test

Abstract

The utility model discloses a solid-state battery mould suitable for X-CT (X-Computed Tomography) test, which is of a vertically symmetrical structure and comprises a mould sleeve, two electrode stems, two pressure maintaining pieces and a buffer sealing piece. The mold sleeve comprises a pressure maintaining area and a testing area; the two electrode rods are symmetrically arranged, the upper electrode rod sequentially comprises a pressure bearing table, a supporting table and a dowel bar from top to bottom, and the pressure bearing table is connected with an external pressurizing device; the pressure maintaining piece is in a T-shaped cylinder shape, is fixedly connected with the pressure maintaining area of the die sleeve piece through threads, and abuts against one side of the electrode rod supporting table for pressure maintaining; the buffer sealing piece is a cylindrical rubber elastic piece, is arranged in the die sleeve pressure maintaining area, abuts against one side of the electrode rod supporting table and plays a role in sealing and pressure self-adaption. According to the utility model, the problem that the solid-state battery cannot autonomously maintain the pressure during the X-CT test is solved, meanwhile, stable and self-adaptive pressure can be provided for the tested battery through the buffer sealing element, and the stability of the solid-state battery during the test is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery testing device field, concretely relates to a solid state battery mould suitable for X-CT test. BACKGROUND

[0002] With the continuous development of science and technology, energy storage technology plays an increasingly important role in modern society. As a new type of battery technology with high energy density, high safety and long life, solid state battery has attracted much attention. In the research and development process of solid state battery, accurate characterization of its internal structure and performance is crucial. Traditional testing methods often cannot intuitively observe the internal changes of solid state battery during charging and discharging, and cannot meet the needs of in-depth research on its performance. In-situ X-CT (X-ray computed tomography) testing technology provides a new means for the research of solid state battery. Through X-CT technology, three-dimensional imaging of solid state battery can be performed without damaging the battery, and real-time observation of the internal structure changes, electrode material distribution, porosity and possible cracks, short circuits and other problems of the battery can be performed.

[0003] Stacking pressure plays a crucial role in the performance of solid state battery. However, the existing devices for in-situ X-CT testing currently available are difficult to achieve stable stacking pressure during testing. Firstly, due to the different imaging contrast of X-rays for elements with different atomic numbers, a plastic shell is usually selected as a sheath mold, and there cannot be other components around the mold that affect imaging, which makes it difficult to apply a pressure and pressure maintaining device to the battery mold. Secondly, the size of the battery mold used for X-CT testing directly affects the testing accuracy, so a smaller battery mold is usually selected for testing. However, due to the limitations of the size of the mold itself, it is extremely difficult to maintain pressure while maintaining the small size of the battery mold without affecting the testing effect. In view of the above situation, in order to better meet the research and development needs of solid state battery, it is urgent to develop a new type of in-situ X-CT testing device for solid state battery. The device should ensure that the overall size of the solid state battery is small, achieve stable stacking pressure, improve testing accuracy, and thus provide strong technical support for the mechanism research and performance improvement of solid state battery. UTILITY MODEL CONTENTS

[0004] The utility model provides a solid state battery mould suitable for X-CT test, which can solve the problem of ineffective pressure maintenance of solid state battery during X-CT test, that is, improve the pressure stability during testing, and maintain the small size of solid state battery mold, and ensure the testing accuracy.

[0005] The utility model aims to realize the following technical scheme:

[0006] A solid-state battery mold suitable for X-CT testing, characterized in that it comprises:

[0007] A mold sleeve, two electrode rods, two pressure maintaining pieces, and a buffer seal;

[0008] The mold sleeve is provided with a test area for accommodating a solid-state battery and a pressure maintaining area for accommodating the pressure maintaining pieces and the buffer seal, and the pressure maintaining area is internally threaded; the electrode rods pass through the mold sleeve at the pressure maintaining area and the test area and are in close contact with the solid-state battery; the pressure maintaining pieces are connected to the pressure maintaining area of the mold sleeve by threads and can be tightened, abut against the support table of the electrode rods, and maintain pressure; the buffer seal is an elastic seal and is internally accommodated in the pressure maintaining area of the mold sleeve, abuts against one side of the support table of the electrode rods, and plays a sealing and pressure self-adapting role.

[0009] Preferably, the electrode rod comprises, from top to bottom, a pressure bearing table, a support table, and a force transmission rod.

[0010] Preferably, the pressure bearing table is connected to an external pressure applying device, the pressure bearing table is provided with an electrode hole and is connected to an external battery testing device, and the pressure bearing table is threadedly connected to the force transmission rod.

[0011] Preferably, the support table is located on the force transmission rod and is pressed against the buffer seal after pressure is applied.

[0012] Preferably, the force transmission rod passes through the buffer seal, extends from the pressure maintaining area to the test area, and is in close contact with the solid-state battery.

[0013] Preferably, the pressure maintaining pieces are connected to the pressure maintaining area of the mold sleeve by threads, the pressure maintaining pieces are pressed against the support table to maintain pressure.

[0014] Preferably, the buffer seal is internally accommodated in the pressure maintaining area and is in close contact with the bottom of the pressure maintaining area and the support table under external pressure and elastically deforms.

[0015] Preferably, the buffer seal is an elastic piece and is made of an elastic material, including but not limited to rubber, plastic, and metal material.

[0016] Preferably, the solid-state battery is placed in the test area of the solid-state battery mold, the external pressure applying device applies pressure to the pressure bearing table, the pressure is transmitted to the solid-state battery through the force transmission rod, the pressure maintaining pieces are tightened with the mold sleeve and are in close contact with the pressure bearing table to maintain pressure before the external pressure applying device is removed, and finally the external pressure applying device is removed.

[0017] Compared with the prior art, the utility model has the following outstanding advantages:

[0018] 1. The utility model has the advantages of simple structure, reasonable design, and easy implementation.

[0019] 2. This utility model designs an electrode rod with a pressure-bearing platform and a support platform. By tightening the pressure-holding component and contacting it with the electrode rod support platform, the solid-state battery mold can achieve autonomous pressure holding without the need for an external pressure-holding device.

[0020] 3. This utility model can achieve pressure maintenance of solid-state batteries by tightening the pressure-maintaining component, without changing the size of the mold sleeve, thus ensuring the accuracy of solid-state battery X-CT testing.

[0021] 4. This utility model has a deformable buffer seal inside the mold sleeve, which can expand under external pressure, so that the inner wall of the mold sleeve is in close contact, thus achieving a reliable sealing effect.

[0022] 5. This utility model has an elastic buffer seal inside the mold sleeve, which can limit the expansion and contraction of solid-state battery materials and provide stable adaptive pressure to the solid-state battery.

[0023] In summary, this utility model has a simple structure and reasonable design, and can provide effective pressure retention and sealing during X-CT testing of solid-state batteries. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure provided in the embodiments of this utility model;

[0025] Figure 2 This is an exploded schematic diagram of the upper part of the device provided in the embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the pressurization process provided in the embodiments of this utility model;

[0027] Figure 4 This is a schematic diagram of the test process structure provided in the embodiments of this utility model.

[0028] Explanation of reference numerals in the attached drawings: 01—Mold sleeve; 02—Electrode rod; 03—Pressure holding component; 04—Buffer seal; 011—Pressure holding area; 012—Test area; 021—Pressure bearing platform; 0211—Electrode hole; 022—Support platform; 023—Force transmission rod; 0231—Force transmission rod thread; 05—Solid-state battery; 06—External pressurization device; 07—External battery testing device; 08—X-CT device. Detailed Implementation

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

[0030] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "upper," "lower," and "top" is based on the orientation or positional relationship shown in the accompanying drawings. This is merely for the convenience of describing this application and for simplifying the description, and does not indicate or imply that the device or element referred to must be in a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0031] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0032] refer to Figures 1-4 This embodiment provides a solid-state battery mold suitable for X-CT testing.

[0033] refer to Figure 1 A solid-state battery mold suitable for X-CT testing includes: a mold sleeve 01, an electrode rod 02, a pressure holding component 03, a buffer seal 04, and a solid-state battery 05; wherein the mold sleeve 01 includes a pressure holding area 011 and a test area 012; the electrode rod includes a pressure bearing platform 021, a support platform 022, and a force transmission rod 023, and the pressure bearing platform is provided with an electrode hole 0211;

[0034] refer to Figure 2 The force transmission rod 023 passes through the buffer seal 04 and the pressure holding member 03 respectively. The top connection of the force transmission rod 023 is provided with a force transmission rod thread 0231, which is threadedly connected to the pressure bearing platform 021. The lower connection of the pressure holding member 03 is provided with a thread, which is used to connect with the pressure holding area 011 of the mold sleeve 01.

[0035] refer to Figure 2 The specific implementation sequence is as follows: First, place the solid-state battery 05 in the test area 012 of the mold sleeve 01, then place the buffer seal 04 into the pressure holding area 011, continue to pass the electrode rod 02 through the buffer seal 04 to hold the solid-state battery, then put the pressure holding part 03 into the electrode rod 02 to abut against the support platform 022, and finally tighten the pressure bearing platform 021 to the electrode rod 02.

[0036] refer to Figure 3Using an external pressurizing device 06, stacking pressure is applied to the solid-state battery 05 through the upper and lower pressure plates 021. After reaching the target pressure, the pressure holding component 03 is screwed tightly to the pressure holding area 011 of the mold sleeve 01 through the thread until the pressure holding component 011 abuts against the support platform 022, and the battery assembly is completed.

[0037] refer to Figure 3 The support platform 022 abuts against the buffer seal 04. Under pressure, the buffer seal 04 undergoes elastic deformation. The buffer seal 04 makes close contact with the inner wall of the pressure holding area 011 and the force transmission rod 023, thus playing a sealing role. In addition, the elastic deformation of the buffer seal 04 can also alleviate the stress changes caused by volume changes during the electrochemical testing of solid-state batteries, providing stable and continuous adaptive pressure.

[0038] refer to Figure 4 Remove the external pressurization device 06, perform in-situ X-CT testing on the installed solid-state battery device, use the external battery testing device 07 to perform electrochemical testing on the solid-state battery 05, and use the X-CT device 08 to perform X-CT testing on the solid-state battery.

Claims

1. A solid-state battery mold suitable for X-CT testing, characterized in that, include: Mold sleeve (01), two electrode rods (02), two pressure holding components (03), and buffer seal (04); The mold sleeve (01) is provided with a test area (012) for accommodating the solid-state battery and a pressure-holding area (011) for accommodating the pressure-holding component (03) and the buffer seal (04). The pressure-holding area (011) has internal threads. The electrode rod (02) passes through the mold sleeve (01) and the pressure-holding area (011) and the test area (012), and is in close contact with the solid-state battery (05). The pressure-holding component is connected to the pressure-holding area (011) of the mold sleeve (01) by threads and can be tightened. It abuts against the support platform (022) of the electrode rod (02) to maintain pressure. The buffer seal (04) is an elastic seal, built into the pressure-holding area (011) of the mold sleeve, and abuts against one side of the electrode rod support platform (022), which plays a role in sealing and pressure self-adaptation.

2. A solid-state battery mold suitable for X-CT testing as described in claim 1, characterized in that, The electrode rod (02) includes, from top to bottom, a pressure bearing platform (021), a support platform (022), and a force transmission rod (023).

3. A solid-state battery mold suitable for X-CT testing as described in claim 2, characterized in that, The pressure platform (021) is connected to the external pressurization device (06). The pressure platform (021) is provided with an electrode hole (0211) and is connected to the external battery testing device (07). The pressure platform (021) and the force transmission rod are connected by a thread.

4. A solid-state battery mold suitable for X-CT testing as described in claim 2, characterized in that, The support platform (022) is located on the force transmission rod (023) and is pressed against the buffer seal (04) after being pressurized.

5. A solid-state battery mold suitable for X-CT testing as described in claim 2, characterized in that, The force transmission rod (023) passes through the buffer seal (04), extends from the pressure holding area (011) to the test area (012), and is in close contact with the solid-state battery.

6. A solid-state battery mold suitable for X-CT testing as described in claim 1, characterized in that, The pressure-holding component (03) is connected to the pressure-holding area (011) of the mold sleeve (01) by a thread, and the pressure-holding component (03) is pressed against the support platform (022) to maintain pressure.

7. A solid-state battery mold suitable for X-CT testing as described in claim 1, characterized in that, The buffer seal (04) is built into the pressure holding area (011) and is in close contact with the bottom of the pressure holding area (011) and the support platform (022) under external pressure and undergoes elastic deformation.

8. A solid-state battery mold suitable for X-CT testing as described in claim 1, characterized in that, The buffer seal (04) is an elastic element, and the elastic material is selected, including but not limited to rubber, plastic and metal materials.

9. A solid-state battery mold suitable for X-CT testing as described in claim 3, characterized in that, The solid-state battery is placed in the test area (012) of the solid-state battery mold. The external pressurizing device (06) pressurizes the pressure plate (021). The pressure is transmitted to the solid-state battery (05) through the force transmission rod (023). Before removing the external pressurizing device (06), the pressure holding component (03) is tightened to the mold sleeve (01) and made to contact the pressure plate (021) tightly to maintain pressure. Finally, the external pressurizing device (06) is removed.

Images