Pole piece flexibility evaluation device

Abstract

The utility model discloses a device for evaluating the flexibility of a pole piece. The device comprises a bearing mechanism, a pressing mechanism, a fixing mechanism and a measuring mechanism, the bearing mechanism comprises two guide rails which are distributed in parallel in the horizontal direction; the downward pressing mechanism comprises a guide plate and a downward pressing plate, the guide plate is arranged on one guide rail of the bearing mechanism, and the downward pressing plate is arranged on the inner side face of the guide plate; the fixing mechanism comprises a fixing plate and a clamping unit, and the fixing plate is arranged on the other guide rail of the bearing mechanism; the clamping unit is fixedly connected to the inner side face of the fixing plate, and the clamping unit right faces the guide plate. The measuring mechanism comprises at least one measuring plate, and the two ends of the measuring plate are arranged on the two guide rails respectively; when the pole piece flexibility detection device is used, the pole pieces are clamped in the fixing mechanism after being attached end to end, the flexibility of different pole pieces can be compared by applying the same force and the lower height or pressing the same height and the lower pressure, and the operation is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a pole piece flexibility evaluation device. Background Art

[0002] In the structure of lithium batteries, pole pieces are an important component. In addition to meeting the expected indicators such as surface density, compaction and thickness, ideal pole pieces also need to meet good processing performance, and pole piece flexibility is one of the important evaluation methods. Usually, the evaluation of flexibility uses a specific device to test the force or deformation difference reflected by the pole piece during operations such as bending or folding, so as to guide the optimization of process parameters and the selection of pole piece materials, thereby improving battery cell performance.

[0003] However, in the prior art, the electrode flexibility evaluation device has many parts and components, and the installation and operation are relatively complicated, making it inconvenient to use. Summary of the invention

[0004] The utility model aims to provide a device for evaluating the flexibility of a pole piece with simple structure and rapid measurement.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A pole piece flexibility evaluation device comprises a bearing mechanism, a pressing mechanism, a fixing mechanism and a measuring mechanism; the bearing mechanism comprises two guide rails parallelly distributed in the horizontal direction; the pressing mechanism comprises a guide plate and a pressing plate, the guide plate is arranged on one of the guide rails of the bearing mechanism, and the pressing plate is arranged on the inner side surface of the guide plate; the fixing mechanism comprises a fixing plate and a clamping unit, the fixing plate is arranged on the other guide rail of the bearing mechanism; the clamping unit is fixedly connected to the inner side surface of the fixing plate, and the clamping unit is directly opposite to the guide plate; the measuring mechanism comprises at least one measuring plate, the two ends of the measuring plate are respectively arranged on two guide rails, the measuring plate is a plate-like structure made of a transparent material with a plurality of scale lines, and the scale lines of the measuring plate are perpendicular to the length direction of the guide rails.

[0007] Furthermore, a first slide groove is opened on the top surface of the two guide rails, and the two first slide grooves are distributed in parallel. The bottom of the guide plate is slidably connected to the first slide groove of one of the guide rails, and the bottom of the fixed plate is slidably connected to the first slide groove of the other guide rail.

[0008] Furthermore, a second slide groove is provided on the inner side surface of the guide plate, the second slide groove is perpendicular to the horizontal direction, and the lower pressing plate is slidably connected in the second slide groove.

[0009] Furthermore, the clamping unit includes an upper clamping plate, a lower clamping plate, and screws. The upper clamping plate and the lower clamping plate are fixedly connected to the inner side of the fixing plate. The upper clamping plate and the lower clamping plate are distributed longitudinally. The screws are threadedly connected to the upper clamping plate and the lower clamping plate in sequence from top to bottom.

[0010] Furthermore, there are two measuring plates, which are parallel to each other; and the pressing mechanism and the fixing mechanism are located between the two measuring plates.

[0011] Furthermore, a bottom plate is fixedly connected between the two guide rails, and the top surface of the bottom plate and the top surface of the guide rails are located in the same plane.

[0012] Compared with the prior art, the utility model has the following advantages and positive effects:

[0013] The utility model is composed of four parts: a bearing mechanism, a pressing mechanism, a fixing mechanism and a measuring mechanism. The structure of each part is very simple, and installation, disassembly and storage are relatively convenient. When in use, you only need to fit the pole pieces end to end and clamp them in the fixing mechanism. When the same force is applied, the height at which the pole pieces drop after being subjected to the force can be compared, or the same height can be pressed down and the downward force can be compared to compare the flexibility of different pole pieces. The operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a fixed structure diagram of the pressing mechanism of the utility model;

[0017] Figure 3 This is a state diagram of the utility model when measuring the flexibility of the pole piece.

[0018] In the figure: 1. bearing mechanism; 11. guide rail; 111. first slide groove; 12. bottom plate; 2. pressing mechanism; 21. guide plate; 211. second slide groove; 22. pressing plate; 3. fixing mechanism; 31. fixing plate; 32. upper clamping plate; 33. lower clamping plate; 34. screw; 4. measuring mechanism; 41. scale line; 5. pole piece. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1-Figure 3 As shown, a pole piece flexibility evaluation device comprises a bearing mechanism 1, a pressing mechanism 2, a fixing mechanism 3 and a measuring mechanism 4.

[0021] The supporting mechanism 1 in this embodiment includes two guide rails 11 distributed in parallel in the horizontal direction. The guide rails 11 are made of metal material. First slide grooves 111 are opened on the top surfaces of the two guide rails 11. The two first slide grooves 111 are distributed in parallel. Lubricating oil is applied inside the first slide grooves 111 to reduce the friction of the inner walls of the first slide grooves 111. A bottom plate 12 is fixedly connected between the two guide rails 11. The top surface of the bottom plate 12 and the top surface of the guide rails are located in the same plane. In some embodiments, the bottom plate 12 and the guide rails 11 are integrally formed.

[0022] The pressing mechanism 2 in this embodiment includes a guide plate 21 and a pressing plate 22. The guide plate 21 is arranged on one of the guide rails 11 of the supporting mechanism 1, and its installation method is that the bottom of the guide plate 21 is slidably connected to the first slide groove 111 of one of the guide rails 11; the pressing plate 22 is arranged on the inner side surface of the guide plate 21, and a second slide groove 211 is opened on the inner side surface of the guide plate 21, and the second slide groove 211 is perpendicular to the horizontal direction, and the pressing plate 22 is slidably connected in the second slide groove 211.

[0023] The fixing mechanism 3 in this embodiment includes a fixing plate 31 and a clamping unit. The fixing plate 31 is arranged on another guide rail 11 of the supporting mechanism 1. The installation method is to slide the fixing plate 31 into the first slide groove 111 of the other guide rail 11; the clamping unit is fixedly connected to the inner side surface of the fixing plate 31, and the clamping unit is opposite to the guide plate 21. The clamping unit includes an upper clamping plate 32, a lower clamping plate 33, and a screw 34. The upper clamping plate 32 and the lower clamping plate 33 are fixedly connected to the inner side surface of the fixing plate 31. The upper clamping plate 32 and the lower clamping plate 33 are distributed longitudinally. The screw 34 is threadedly connected to the upper clamping plate 32 and the lower clamping plate 33 from top to bottom in sequence.

[0024] The measuring mechanism 4 in this embodiment includes two measuring plates 4, which are parallel to each other; the pressing mechanism 2 and the fixing mechanism 3 are located between the two measuring plates 4, and the two ends of the measuring plates 4 are respectively arranged on two guide rails 11. The measuring plates 4 are plate-like structures made of a transparent material with a plurality of scale lines 41, and the scale lines of the measuring plates 41 are perpendicular to the length direction of the guide rails 11.

[0025] One method of using the utility model:

[0026] First, the fixing mechanism 2 and the pressing mechanism 3 are slidably connected to the two guide rails 11 respectively, a section of a pole piece 5 is cut, and the pole piece 5 is connected end to end after being bent, and the connected pole piece 5 is placed end to end between the upper clamping plate 32 and the lower clamping plate 33 of the clamping unit, and the pole piece 5 is fixed to the clamping unit at the end to end connection by screws 34 passing through the pole piece 5, so that the pole piece 5 is fixed to the fixing mechanism 3, and then the measuring plate 4 is slidably connected to the guide rail 11, and the two measuring plates 4 are pushed closer to each other until they touch or are close to the edge of the pole piece 5, and the height of the pole piece 5 at this time is recorded, and finally a certain force is applied to the lower pressing plate 22, and the height to which the pole piece 5 has fallen is observed through the scale on the measuring plate 4.

[0027] Then, in the same manner, a section of the same length of another pole piece 5 is cut, and the same force is applied to observe the height to which the pole piece 5 falls.

[0028] By comparing the two heights, the flexibility of the two pole pieces 5 is compared.

[0029] Another method of using the utility model:

[0030] First, the fixing mechanism 2 and the pressing mechanism 3 are slidably connected to the two guide rails 11 respectively, a section of a pole piece 5 is cut, and the pole piece 5 is connected end to end after being bent, and the connected pole piece 5 is placed end to end between the upper clamping plate 32 and the lower clamping plate 33 of the clamping unit, and the pole piece 5 is fixed to the clamping unit at the end to end connection by screws 34 passing through the pole piece 5, so that the pole piece 5 is fixed to the fixing mechanism 3, and then the measuring plate 4 is slidably connected to the guide rail 11, and the two measuring plates 4 are pushed closer to each other until they touch or are close to the edge of the pole piece 5, and the height of the pole piece 5 at this time is recorded, and finally a certain force is applied to the lower pressing plate 22, and the height of the pole piece 5 is observed through the scale on the measuring plate 4, and the magnitude of the force applied at this time is recorded.

[0031] Then, in the same way, cut a section of the same length of another pole piece 5, press the pole piece 5 down to the same height, record the magnitude of the force applied at this time, and finally compare the magnitudes of the twice applied forces to determine the superiority and inferiority of the flexibility of the two pole pieces 5.

[0032] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work, any modifications, equivalent substitutions, improvements, etc. made should be included in the protection scope of the present invention.

Claims

1. A pole piece flexibility evaluation device, comprising a bearing mechanism, a pressing mechanism, a fixing mechanism and a measuring mechanism; characterized in that: The bearing mechanism comprises two guide rails which are parallelly distributed in the horizontal direction; The pressing mechanism comprises a guide plate and a pressing plate, wherein the guide plate is arranged on one of the guide rails of the bearing mechanism, and the pressing plate is arranged on the inner side surface of the guide plate; The fixing mechanism comprises a fixing plate and a clamping unit, wherein the fixing plate is arranged on another guide rail of the bearing mechanism; the clamping unit is fixedly connected to the inner side surface of the fixing plate, and the clamping unit faces the guide plate; The measuring mechanism comprises at least one measuring plate, the two ends of which are respectively arranged on two guide rails. The measuring plate is a plate-like structure made of a transparent material with a plurality of scale lines, and the scale lines of the measuring plate are perpendicular to the length direction of the guide rails.

2. The pole piece flexibility evaluation device according to claim 1, characterized in that: A first slide groove is provided on the top surface of the two guide rails, and the two first slide grooves are distributed in parallel. The bottom of the guide plate is slidably connected to the first slide groove of one of the guide rails, and the bottom of the fixed plate is slidably connected to the first slide groove of the other guide rail.

3. The pole piece flexibility evaluation device according to claim 2, characterized in that: A second slide groove is provided on the inner side surface of the guide plate, the second slide groove is perpendicular to the horizontal direction, and the lower pressing plate is slidably connected in the second slide groove.

4. The pole piece flexibility evaluation device according to claim 3, characterized in that: The clamping unit includes an upper clamping plate, a lower clamping plate, and screws. The upper clamping plate and the lower clamping plate are fixedly connected to the inner side of the fixing plate. The upper clamping plate and the lower clamping plate are distributed longitudinally. The screws are threadedly connected to the upper clamping plate and the lower clamping plate in sequence from top to bottom.

5. The pole piece flexibility evaluation device according to claim 4, characterized in that: There are two measuring plates, which are parallel to each other; the pressing mechanism and the fixing mechanism are located between the two measuring plates.

6. The pole piece flexibility evaluation device according to claim 5, characterized in that: A bottom plate is fixedly connected between the two guide rails, and the top surface of the bottom plate and the top surface of the guide rails are located in the same plane.

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