Powder resistivity measuring die

Abstract

The utility model belongs to the technical field of resistance measurement, and particularly relates to a powder resistivity measuring die, which comprises a base, a positioning ring, a first gasket and a second gasket, the base is provided with a groove for accommodating the positioning ring, a through hole with two through ends is arranged in the base, the through hole and the groove are coaxially arranged, the first gasket is arranged in the positioning ring, and the second gasket is arranged in the positioning ring. And the second gasket is arranged in the through hole. The first gasket and the second gasket are used for clamping powder to be tested up and down to form a test closed space, the test closed space is arranged in the through hole of the base, the powder resistivity can be rapidly and effectively detected, and a sample can be rapidly disassembled and replaced through the positioning ring; the die can be directly applied to the diaphragm resistance instrument, so that the die has two purposes, the operability is high, and the investment cost is low; and meanwhile, the powder floating problem of the sample in the powder resistivity test can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of resistance measurement technology, and in particular relates to a powder resistivity measuring mold. Background Technology

[0002] The rate performance of lithium-ion batteries is closely related to battery resistance, which includes ionic resistance and electronic resistance. In actual battery research and development and production, the ionic resistance needs to be evaluated at the finished battery stage, while the electronic resistance can be quickly evaluated at the material and electrode stages. Therefore, testing the resistivity of lithium battery positive and negative electrode materials is of great significance for the stability of material processing and the prediction of the resistance of finished battery cells.

[0003] Measuring powder resistivity reveals the electrical conductivity of materials, providing a basis for material selection and modification. In battery material development, testing the powder resistivity of different materials allows for the selection of those with excellent conductivity, further optimizing overall battery performance. Currently, powder resistivity testing requires pellet pressing, which is time-consuming and difficult. While powder resistivity meters exist that can measure resistivity directly without pellet pressing, they are expensive and cannot simultaneously test the resistivity of films and powders. Utility Model Content

[0004] The purpose of this invention is to provide a powder resistivity measuring mold that addresses the shortcomings of existing technologies. This mold can be used in a diaphragm resistivity meter to test both diaphragm resistance and powder resistance, thus serving two purposes in one. It can accurately measure powder resistivity, which can guide further material optimization and reduce testing costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A powder resistivity measuring mold includes a base, a positioning ring, a first gasket, and a second gasket. The base has a groove for accommodating the positioning ring and a through hole with both ends passing through it. The through hole and the groove are coaxially arranged. The first gasket is placed inside the positioning ring, and the second gasket is placed inside the through hole.

[0007] Preferably, the groove is a frustum-shaped groove, and the positioning ring is a frustum-shaped hollow ring that matches the size of the groove.

[0008] Preferably, the groove is a frustum-shaped groove, and the positioning ring is a frustum-shaped hollow ring that matches the size of the groove.

[0009] Preferably, the groove is a hemispherical groove, and the positioning ring is a hemispherical hollow ring that matches the size of the groove.

[0010] Preferably, the height of the frustum of the positioning ring is greater than or equal to the thickness of the first gasket.

[0011] Preferably, the thickness of the second gasket is greater than the thickness of the first gasket.

[0012] More preferably, the thickness of the first gasket is 1-2 mm, and the thickness of the second gasket is 5-8 mm.

[0013] Preferably, the inner diameter of the positioning ring is the same as the diameter of the first gasket.

[0014] Preferably, the diameter of the second gasket is smaller than the diameter of the first gasket.

[0015] Preferably, the diameter of the second gasket is the same as the diameter of the through hole.

[0016] More preferably, the diameter of the first gasket is 16-18 mm, and the diameter of the second gasket is 13-15 mm.

[0017] Preferably, the through hole has an opening at the end away from the base.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: The powder resistivity measuring mold provided by this utility model forms a sealed testing space by using a first and a second pad to clamp the powder to be tested from above and below. The powder is placed inside the through hole of the base, which can quickly and effectively detect the powder resistivity. The positioning ring allows for quick disassembly and replacement of the sample. This mold can be directly applied to a diaphragm resistivity meter, achieving dual-purpose functionality, strong operability, and low investment cost. At the same time, it can improve the problem of powder drift in powder resistivity testing. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the overall structure of this utility model.

[0020] Figure 2 This is a structural schematic diagram of the base of this utility model.

[0021] Figure 3 This is a schematic diagram of the positioning ring of this utility model.

[0022] Figure label:

[0023] 1. Base, 11. Groove, 12. Through hole, 13. Opening, 2. Positioning ring, 3. First gasket, 4. Second gasket. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] like Figure 1-3 As shown, a powder resistivity measuring mold includes a base 1, a positioning ring 2, a first gasket 3, and a second gasket 4. The base 1 has a groove 11 for accommodating the positioning ring 2, and a through hole 12 extending through both ends. The through hole 12 and the groove 11 are coaxially arranged. The first gasket 3 is placed inside the positioning ring 2, and the second gasket 4 is placed inside the through hole 12. When the first gasket 3 is placed into the inner circular hole of the positioning ring 2, the first gasket 3 and the positioning ring 2 are interlocked. Then, the positioning ring 2 is placed into the groove 11 of the base 1. The shape of the positioning ring 2 matches that of the groove 11, and the positioning ring 2 can be easily removed from the groove 11. When placed on a worktable, the positioning ring 2 is fixed in the groove 11 by the base 1.

[0026] Furthermore, in this embodiment, the groove 11 is a frustum-shaped groove, and the positioning ring 2 is a frustum-shaped hollow ring that matches the size of the groove 11. Figure 3 As shown, the internal hollow ring of the positioning ring 2 can be a stepped hollow ring, with the lower end diameter being the same as the diameter of the first gasket 3 and the upper end diameter being the same as the diameter of the through hole 12 above.

[0027] Furthermore, in more embodiments, the groove 11 is a frustum-shaped groove, and the positioning ring 2 is a frustum-shaped hollow ring that matches the size of the groove 11.

[0028] Furthermore, in more embodiments, the groove 11 is a hemispherical groove, and the positioning ring 2 is a hemispherical hollow ring that matches the size of the groove 11.

[0029] Furthermore, the height of the frustum of the positioning ring 2 is greater than or equal to the thickness of the first gasket 3. The bottom of the first gasket 3 is flat after it is installed on the positioning ring 2, and the top can be a flat plane or a cavity with space for accommodating the powder to be tested.

[0030] Furthermore, the thickness of the second gasket 4 is greater than the thickness of the first gasket 3. The thickness of the first gasket 3 is 1-2 mm, and the thickness of the second gasket 4 is 5-8 mm. In this embodiment, the thickness of the first gasket 3 is 1 mm, and the thickness of the second gasket 4 is 5 mm. After the first gasket 3 is installed onto the positioning ring 2, the positioning ring 2 is then installed into the base 1. After placing it into the test position, the powder to be tested is added through the through hole 12 of the base 1, and then the second gasket 4 is placed on top of it. The resistance meter can then be used to test it.

[0031] Furthermore, the inner diameter of the positioning ring 2 is the same as the diameter of the first gasket 3. After the first gasket 3 and the positioning ring 2 are fastened together, a complete bottom surface is formed, which facilitates installation and disassembly.

[0032] Furthermore, the diameter of the second gasket 4 is smaller than that of the first gasket 3. After the second gasket 4 is inserted into the through hole 12 of the base 1, it presses the powder to be tested on the first gasket 3 tightly under the action of external pressure and its own weight, forming a dense powder.

[0033] Furthermore, the diameter of the second gasket 4 is the same as the diameter of the through hole 12. The diameter of the first gasket 3 is 16-18 mm, and the diameter of the second gasket 4 is 13-15 mm. In this embodiment, the diameter of the first gasket 3 is 17 mm, and the diameter of the second gasket 4 is 15 mm.

[0034] Furthermore, the through hole 12 has an opening 13 at the end away from the base 1. This opening 13 facilitates the insertion of the powder to be tested and the installation of the second gasket 4.

[0035] The specific methods for testing powder resistivity are as follows:

[0036] 1. Insert the 1mm first washer 3 into the positioning ring 2, and then insert the positioning ring 2 into the groove 11 of the base 1;

[0037] 2. Weigh an appropriate amount of the powder sample to be tested and place it into the through hole 12 of the base 1, and press the second gasket 4 off the sample.

[0038] 3. Place the complete base 1 on the test station, with the positioning ring 2 located below the base 1 and against the diaphragm resistor. Select the test pressure and holding time.

[0039] 4. After the test is completed, the positioning ring 2, the sample on it, and the second gasket 4 can be directly removed for cleaning.

[0040] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A powder resistivity measuring mold, characterized in that: The device includes a base (1), a positioning ring (2), a first gasket (3), and a second gasket (4). The base (1) has a groove (11) for accommodating the positioning ring (2). The base (1) has a through hole (12) with both ends through it. The through hole (12) and the groove (11) are coaxially arranged. The first gasket (3) is placed inside the positioning ring (2), and the second gasket (4) is placed inside the through hole (12).

2. The powder resistivity measuring mold according to claim 1, characterized in that: The groove (11) is a frustum-shaped groove, and the positioning ring (2) is a frustum-shaped hollow ring that matches the size of the groove (11).

3. The powder resistivity measuring mold according to claim 1, characterized in that: The groove (11) is a frustum-shaped groove, and the positioning ring (2) is a frustum-shaped hollow ring that matches the size of the groove (11).

4. The powder resistivity measuring mold according to claim 1, characterized in that: The groove (11) is a hemispherical groove, and the positioning ring (2) is a hemispherical hollow ring that matches the size of the groove (11).

5. The powder resistivity measuring mold according to claim 2, 3, or 4, characterized in that: The height of the positioning ring (2) is greater than or equal to the thickness of the first gasket (3).

6. The powder resistivity measuring mold according to claim 5, characterized in that: The thickness of the second gasket (4) is greater than the thickness of the first gasket (3).

7. The powder resistivity measuring mold according to claim 2, 3, or 4, characterized in that: The inner diameter of the positioning ring (2) is the same as the diameter of the first gasket (3).

8. The powder resistivity measuring mold according to claim 7, characterized in that: The diameter of the second gasket (4) is smaller than the diameter of the first gasket (3).

9. The powder resistivity measuring mold according to claim 8, characterized in that: The diameter of the second gasket (4) is the same as the diameter of the through hole (12).

10. The powder resistivity measuring mold according to claim 1, characterized in that: The through hole (12) has an opening (13) at the end away from the base (1).

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