Membrane liquid climbing height measuring device

Abstract

The utility model discloses a diaphragm liquid climbing height measuring device which comprises a diaphragm supporting unit, the diaphragm supporting unit comprises a horizontally-arranged bottom plate, liquid inlet holes are formed in the bottom plate, the two ends of the bottom plate are respectively connected with a supporting plate, the supporting plates are perpendicular to the bottom plate, and the diaphragm supporting unit is connected with the bottom plate. Scale marks used for measuring the vertical infiltration height of the diaphragm are arranged on the observation face of at least one supporting plate, a buckle plate is arranged in the middle of the bottom plate, a gap is formed between the buckle plate and the bottom plate and used for allowing the diaphragm to be measured to penetrate through, and the supporting plates are used for supporting and fixing the two ends of the diaphragm to be measured. According to the utility model, the diaphragm to be measured can be supported through the diaphragm supporting unit, electrolyte can enter through the liquid inlet hole in the bottom plate, the liquid climbing height of the diaphragm to be measured can be measured, the liquid climbing height of the diaphragm can be directly observed through the scale marks, the operation is convenient, the structure is simple, and the popularization and popularization are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a measuring device for the wicking height of a diaphragm. Background Art

[0002] As a key material of lithium-ion batteries, the wetting performance of the diaphragm directly affects the production speed of lithium-ion batteries, the internal resistance of the battery cells, and the rate and cycle performance of the batteries. Among them, the wicking height of the electrolyte in the diaphragm is an important indicator to characterize the wetting performance, which directly reflects the penetration degree of the electrolyte on the surface of the diaphragm. The existing measuring devices for the wicking height of the diaphragm mainly place the diaphragm sample in a specific test cavity, and then inject liquid into the test cavity through a syringe, and observe the penetration of the liquid on the diaphragm, so as to calculate the wicking height of the diaphragm. Although this test method can obtain certain test results, there are some deficiencies: First, it is difficult for the test device to ensure the flatness during the wetting process of the diaphragm. During the test, the diaphragm often curls due to static electricity, making it difficult to measure its actual wetting height; Second, it is easily affected by wall contact during the test. When the diaphragm contacts the container wall, the liquid absorption process will climb along the wall; Then, it is difficult to ensure that the diaphragms are wetted with the electrolyte synchronously, simultaneously, and at the same position during the comparison of multiple samples in the same batch, making it difficult to ensure the accuracy of the results; Finally, the test device has a complex structure and a high manufacturing cost, which is not conducive to popularization and application. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies and defects of the prior art, and provide a measuring device for the wicking height of a diaphragm, which can quickly test the wicking height of the diaphragm, greatly improve the efficiency of diaphragm performance testing, and at the same time has a simple structure and a low cost, making the device widely applicable.

[0004] A measuring device for the wicking height of a diaphragm includes a diaphragm support unit. The diaphragm support unit includes a horizontally arranged bottom plate, and a liquid inlet hole is arranged on the bottom plate. Each end of the bottom plate is connected to a support plate, and the support plate is perpendicular to the bottom plate. Scale lines for measuring the vertical wetting height of the diaphragm are arranged on the observation surface of at least one of the support plates. A buckle plate is arranged in the middle of the bottom plate, and a gap formed between the buckle plate and the bottom plate is used for the diaphragm to be tested to pass through. The support plate is used to support and fix both ends of the diaphragm to be tested.

[0005] Wherein, the heights of the two support plates are the same.

[0006] Wherein, the two support plates have the same structure and the same size.

[0007] Wherein, there are multiple liquid inlet holes.

[0008] Wherein, the number of liquid inlet holes on both sides of the snap plate is the same.

[0009] Wherein, the liquid inlet holes on both sides of the snap plate are symmetrically arranged with the snap plate as the axis.

[0010] Wherein, the snap plate is snap-connected to the bottom plate to form a detachable connection.

[0011] Wherein, the length of the snap plate is consistent with the width of the bottom plate.

[0012] The diaphragm liquid climbing height measuring device comprises a box body for placing the diaphragm support unit to measure the diaphragm liquid climbing height; the box body is a structure with an open top and contains electrolyte.

[0013] Wherein, the box body is a rectangular box.

[0014] The diaphragm liquid climbing height measuring device of the utility model can support the diaphragm to be measured through the diaphragm support unit, can allow the electrolyte to enter through the liquid inlet hole on the bottom plate and measure the liquid climbing height of the diaphragm to be measured, and can directly observe the diaphragm liquid climbing height through the scale line. It is easy to operate and has a simple structure, which is conducive to promotion and popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a 45° oblique view schematic diagram of a diaphragm liquid climbing height measuring device according to an embodiment of the utility model.

[0016] Figure 2 It is a 45° oblique view schematic diagram of the liquid climbing height measurement process of the diaphragm liquid climbing height measurement device of the embodiment of the utility model.

[0017] Figure 3 It is a front view of the diaphragm liquid climbing height measuring device after the liquid climbing of the embodiment of the utility model is stopped.

[0018] Description of reference numerals:

[0019] 1. Scale line; 2. Support plate; 3. Liquid inlet hole; 4. Snap plate; 5. Bottom plate; 6. Box body; 7. Electrolyte; 8. Diaphragm to be tested; 9. Liquid crawling part of the test diaphragm. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] See also Figures 1-3As shown in the figure, a diaphragm climbing liquid height measuring device in the present utility model includes a diaphragm support unit. The diaphragm support unit includes a horizontally arranged bottom plate 5, and a liquid inlet hole 3 is arranged on the bottom plate. Each of the two ends of the bottom plate is connected to a support plate 2, and the support plate is perpendicular to the bottom plate. Scale lines 1 for measuring the vertical wetting height of the diaphragm are arranged on the observation surface of at least one of the support plates. A buckle plate 4 is arranged in the middle of the bottom plate, and a gap formed between the buckle plate and the bottom plate is for the diaphragm 8 to be measured to pass through. The support plate 2 is used to support and fix both ends of the diaphragm to be measured.

[0022] In the embodiments of the present application, the support plate is used to attach to the diaphragm to be measured and measure the wetting height, the bottom plate is used for the immersion and extraction of the electro-hydraulic fluid, and the buckle plate is used to keep the diaphragm always in a horizontal state. During use, only need to pass the diaphragm to be measured through the buckle plate, manually adjust it to be flat, and then fix both ends to the surfaces of the two support plates with tape. The diaphragm is always in a certain tension state, achieving the purpose of simple operation. Moreover, the device of the present utility model has a simple structure, which not only reduces the production cost, but also is convenient for popularization and promotion.

[0023] In a preferred embodiment, the heights of the two support plates are the same. More preferably, the structures and sizes of the two support plates are the same. Of course, the structures of the support plates may not be the same, and the sizes may not be the same, not limited to the embodiments in the figure.

[0024] In some embodiments, there are multiple liquid inlet holes, which can facilitate the entry of electrolyte at multiple positions, ensure better liquid inlet effect and more uniform liquid inlet. In a preferred embodiment, the number of liquid inlet holes on both sides of the buckle plate is the same, such as four, one on each side. Of course, they may not be the same. The shape of the liquid inlet hole is a circular hole, a square hole or other geometric shapes.

[0025] More preferably, the liquid inlet holes on both sides of the buckle plate are symmetrically arranged with the buckle plate as the axis. Of course, they may also be asymmetrically or non-symmetrically distributed. The size of the liquid inlet hole is set according to the situation, such as 2 cm.

[0026] In a preferred embodiment, the buckle plate is detachably connected to the bottom plate by snap connection. For example, there are buckle holes on the bottom plate, and the snap connection parts at both ends of the bottom surface of the buckle plate can be snapped into the buckle holes for fixation, and a space or gap for the diaphragm to be measured to pass through is formed between the bottom surface of the buckle and the bottom plate. The height of the gap is about 10 mm, and it can be made of plastic and is in a plate-like structure.

[0027] In the embodiments of the present application, the size of the diaphragm to be measured is 60 cm x (2 - 4) cm, and the corresponding width of the bottom plate is 10 cm and the length is 36 cm. In a preferred embodiment, its size is 11 cm x 10 cm and the thickness is 0.5 cm. The size of the diaphragm support unit can be set according to the size of the diaphragm to be measured. In the embodiments of the present application, through the structure of the snap plate and the support plate, the diaphragm to be measured can always be maintained at the same horizontal height.

[0028] In some embodiments, the length of the snap plate is the same as the width of the bottom plate. The support plate can be made of a plastic plate, and the bottom plate is a plastic plate. The device of the present utility model uses plastic plates of low-cost materials, which greatly reduces the manufacturing cost and is conducive to popularization and dissemination.

[0029] In some embodiments, for measurement, in the embodiments of the present application, the diaphragm wicking height measuring device further includes a box body 6, which can be a low-cost plastic box and is used to place the diaphragm support unit for measuring the diaphragm wicking height. The box body 6 has an open upper end structure and is filled with electrolyte 7 inside.

[0030] In a preferred embodiment, the box body is a rectangular box. Of course, it can also be of other shapes, and is not limited thereto.

[0031] During measurement, pass the diaphragm to be measured through the snap plate, manually adjust it to be flat, and then fix both ends to the surfaces of the two support plates with tape. The diaphragm to be measured is always in a certain tension state and is fixed on the diaphragm support unit. Finally, immerse the diaphragm support unit flat into the box body with electrolyte, look at the scale of the electrolyte liquid level horizontally and record. After the wicking on the diaphragm surface terminates, take out the measuring device, look at the scale at the end of the wicking horizontally and record. As Figure 3 shown, the distance H from the top of the wicking to the electrolyte liquid level is 60 MM. Then calculate the wicking height through the following formula:

[0032] L = H / sin 30° = 60 * 2 = 120 MM, and 30° is the angle between the diaphragm and the electrolyte liquid level.

[0033] After accurately measuring the wicking heights of different diaphragms, the performance evaluation of the diaphragms can be realized.

[0034] When the present utility model is in use, just immerse the diaphragm support unit horizontally into the box body with electrolyte. According to the test time, it can be taken out at any time to read the scale number on the side of the support plate to calculate the diaphragm wicking height. The whole operation process is simple and easy to understand and easy to operate, which greatly improves the test efficiency.

[0035] The test device of the present utility model can not only be used to test the wicking height of diaphragms, but also can be used to test the wicking height of other thin film materials, and has wide adaptability.

[0036] The device of the utility model can make the diaphragm flat and fixed during measurement, thus solving the problem that the diaphragm is curled due to static electricity and the measurement operation is inconvenient in the existing test process, and making the measurement of the infiltration height more convenient.

[0037] The device of the utility model can make the diaphragm flat and fixed, climb in two directions, and the data of the infiltration height is more accurate, which solves the problem of inaccurate measurement of the infiltration height data due to the diaphragm touching the wall affecting the liquid absorption and climbing in the existing test process.

[0038] The device of the utility model can make the diaphragm flat and fixed, and the flat buckle plate at the bottom can make the contacting position of the diaphragm to be tested at the same level, so that the experiment of the wetting height is more fair, and solves the problem of differences in the time and depth of the diaphragm immersed in the solution in the existing test process.

[0039] In summary, compared with the existing technology, the device of the utility model has the following characteristics and effects:

[0040] 1. Significant cost-effectiveness: The diaphragm liquid height measurement device has a simple structure, low manufacturing cost, and is easy to promote and popularize. Compared with the existing technology, it greatly reduces the manufacturing and use costs of the measurement device and promotes the development and popularization of diaphragm performance measurement technology.

[0041] 2. Easy to operate: The diaphragm creep height measuring device is easy to operate and does not require professional personnel to operate, which greatly improves the test efficiency. At the same time, due to the simple structure of the measuring device, maintenance and maintenance are also more convenient, further improving the efficiency and reliability of the test.

[0042] 3. Wide range of applications: The diaphragm climbing liquid height measuring device is suitable for various types of diaphragms, including but not limited to battery diaphragms, capacitor diaphragms and sensor diaphragms. Due to the simple structure, low cost and easy adjustment and modification of the measuring device, it can adapt to the testing needs of different types of diaphragms, is easy to promote and popularize, and has broad application prospects.

[0043] 4. Easy to promote and apply: Since the diaphragm climbing liquid height measuring device of the utility model has low cost and simple operation, it is easy to promote and apply in various experiments and researches.

[0044] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model.

[0045] Therefore, in any case, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model.

[0046] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Diaphragm creeping liquid height measuring device, characterized in that, It includes a diaphragm support unit, the diaphragm support unit includes a horizontally arranged bottom plate, liquid inlet holes are arranged on the bottom plate, two support plates are respectively connected to both ends of the bottom plate, the support plates are perpendicular to the bottom plate, and scale lines for measuring the vertical wetting height of the diaphragm are arranged on the observation surfaces of at least one of the support plates. A buckle plate is arranged in the middle of the bottom plate, and a gap formed between the buckle plate and the bottom plate is for the diaphragm to be measured to pass through, and the support plates are used to support and fix both ends of the diaphragm to be measured.

2. The diaphragm creeping liquid height measuring device according to claim 1, wherein The heights of the two support plates are the same.

3. The diaphragm creeping liquid height measuring device according to claim 1, wherein, The structures and sizes of the two support plates are the same.

4. The diaphragm climbing liquid height measuring device according to claim 1, wherein, There are multiple liquid inlet holes.

5. The diaphragm climbing liquid height measuring device according to claim 1, characterized in that, The number of liquid inlet holes on both sides of the buckle plate is the same.

6. The diaphragm creeping liquid height measuring device according to claim 1, wherein, The liquid inlet holes on both sides of the buckle plate are symmetrically arranged with the buckle plate as the axis.

7. The diaphragm creeping liquid height measuring device according to claim 1, wherein, The buckle plate is snap-connected to the bottom plate to form a detachable connection.

8. The diaphragm creeping liquid height measuring device according to claim 1, wherein The length of the buckle plate is the same as the width of the bottom plate.

9. The diaphragm creeping liquid height measuring device according to claim 1, wherein, It includes a box body for placing the diaphragm support unit to measure the liquid creeping height of the diaphragm; the box body has an open upper end structure and is filled with electrolyte inside.

10. The diaphragm creeping liquid height measuring device according to claim 9, wherein The box body is a rectangular box.

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