Roll core bending test tool

Abstract

The utility model belongs to the technical field of pressure measuring equipment, and particularly relates to a roll core bending test tool which comprises a rack. The supporting mechanism comprises two supporting frames, the two supporting frames are movably installed in the rack in the X direction, and a pressurizing area for containing a roll core is formed between the two supporting frames; the pressure mechanism is mounted on the rack, is positioned above the pressurizing area and is used for pressurizing the roll core; the pressure detector is mounted on the pressure mechanism and is used for measuring and displaying the pressure applied to the roll core by the pressure mechanism; the distance measuring mechanism is used for detecting and displaying the distance between the two supporting frames in the X direction; the utility model has the beneficial effects that different roll core products are placed on the testing tool for testing, various numerical values such as the length, the maximum pressure value and the like of the roll core can be quickly and directly read and recorded, the bending strength of the roll core can be calculated, and thus the hot pressing of the roll core can be evaluated; furthermore, a good hot-pressing effect of the roll core in the manufacturing process of the battery core can be ensured, and the working efficiency is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure measuring equipment, and in particular relates to a core bending test tool. Background Art

[0002] During the manufacturing process of lithium batteries, hot pressing is inevitable. The purpose of hot pressing is to shape the core. On the one hand, it prevents the core from being scratched due to loose retraction during the shell insertion process; on the other hand, it improves the contact between the positive and negative electrodes and the diaphragm inside the battery and reduces the gap between them, thereby reducing the risk of wrinkles or lithium precipitation. Due to different design parameters of different products (hot pressing pressure, hot pressing time, injection process parameters, etc.), the hot pressing effects required by different products are also quite different.

[0003] In the prior art, the evaluation of the hot pressing effect of the core is mostly done manually by measuring various data of the core through instruments, calculating the bending strength of the core, and then evaluating the hot pressing effect. The steps are cumbersome and the work efficiency is low. Utility Model Content

[0004] The purpose of the utility model is to provide a core bending test tool to solve the above-mentioned technical problems, so as to achieve a more convenient and efficient effect of calculating the bending strength of the core.

[0005] In view of this, the utility model provides a core bending test tool, comprising:

[0006] frame;

[0007] A support mechanism, the support mechanism comprising two support frames, the two support frames are movably mounted in the frame along the X direction, and a pressurized area for placing the winding core is formed between the two support frames;

[0008] A pressure mechanism, which is installed on the frame and located above the pressurizing area and is used to pressurize the winding core;

[0009] A pressure detector, which is installed on the pressure mechanism and is used to measure and display the pressure applied by the pressure mechanism to the winding core;

[0010] The distance measuring mechanism is used to detect and display the distance between the two support frames in the X direction.

[0011] Furthermore, both support frames are provided with bosses, and the bosses are used to support the winding core placed in the pressurized area.

[0012] Furthermore, it also includes a buffer pad, which is arranged on the support frame and located above the boss.

[0013] Furthermore, the buffer pad is provided with an arc-shaped groove, and the arc-shaped groove is adapted to the end structure of the winding core.

[0014] Furthermore, it also includes a sliding guide rail, which is arranged in the frame, and the two support frames are slidably installed on the sliding guide rail.

[0015] Furthermore, the distance measuring mechanism is arranged on a sliding guide rail.

[0016] Furthermore, the sliding guide rail is provided with scale lines.

[0017] Furthermore, it also includes a fixing pin, which is arranged on the support frame and is used to fix the support frame on the sliding guide rail.

[0018] Furthermore, the pressure mechanism comprises:

[0019] A driving motor, wherein the driving motor is mounted on the frame;

[0020] A pressure rod, wherein the driving motor controls the pressure rod to move along the Y direction;

[0021] The head of the pressure rod is used to abut against the winding core.

[0022] Furthermore, the head of the pressure rod is in a cylindrical or rectangular shape.

[0023] The beneficial effects of the utility model are:

[0024] By placing different core products on the test fixture for testing, the core length, maximum pressure value and other values ​​can be quickly and directly read and recorded, and the bending strength of the core can be calculated to evaluate the hot pressing of the core, thereby ensuring a good hot pressing effect for the core during the battery cell manufacturing process, effectively improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 It is a partial enlarged structural schematic diagram of the support frame in the utility model;

[0027] The symbols in the figure are:

[0028] 1. Frame; 2. Support frame; 3. Pressure detector; 4. Boss; 5. Buffer pad; 6. Sliding guide rail; 7. Fixing pin; 8. Driving motor; 9. Pressure rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0031] Embodiment 1:

[0032] This embodiment provides a core bending test tool, including:

[0033] Rack 1;

[0034] A support mechanism, the support mechanism comprising two support frames 2, the two support frames 2 are movably mounted in the frame 1 along the X direction, and a pressurized area for placing the winding core is formed between the two support frames 2;

[0035] A pressure mechanism, which is installed on the frame 1 and located above the pressurizing area, and is used to pressurize the winding core;

[0036] A pressure detector 3, which is installed on the pressure mechanism and is used to measure and display the pressure applied by the pressure mechanism to the winding core;

[0037] The distance measuring mechanism is used to detect and display the distance between the two support frames 2 in the X direction.

[0038] In the present technical solution, the battery cells after capacity division or offline are disassembled, the cores are taken out, the residual electrolyte on the outer surface of the cores is wiped dry, and then the cores are placed in the pressurized area of ​​the test fixture. The two support frames 2 are moved to clamp the cores in the pressurized area, and then the pressure mechanism is started to pressurize the middle position of the cores to deform the cores, and the maximum pressure value F after deformation is recorded by the pressure detector 3.

[0039] The core is located between the two support frames 2 and is clamped and fixed by the two support frames 2. The width b and thickness h of the core have been determined when designing the core. The length L of the core can be quickly detected and recorded through the distance measuring mechanism, and then the bending stress calculation formula σ=(3*F*L) / (2*b*h*h) is used. This formula is an existing public technology and will not be described in detail. After the bending strength of the core is calculated, the hot pressing of the core can be evaluated.

[0040] In summary, through this structural design, different core products are placed on the test fixture for testing, and various values ​​such as the length of the core, the maximum pressure value, etc. can be quickly and directly read and recorded, and the bending strength of the core can be calculated, so as to evaluate the hot pressing of the core, thereby ensuring a good hot pressing effect of the core during the battery cell manufacturing process, effectively improving work efficiency.

[0041] Embodiment 2:

[0042] This embodiment provides a core bending test tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0043] Furthermore, both support frames 2 are provided with bosses 4, and the bosses 4 are used to support the winding core placed in the pressurized area.

[0044] In the present technical solution, the two bosses 4 are respectively arranged on the side where the two support frames 2 are close to each other, and the two ends of the winding core are respectively placed on the two bosses 4, and then the two support frames 2 are moved closer to each other so that the two support frames 2 are respectively abutted against the two ends of the winding core, so that the winding core can be fixed between the two support frames 2.

[0045] This structural design ensures that the winding core can remain horizontal and stably fixed between the two support frames 2, thereby ensuring that the measured winding core length and maximum pressure value can be more accurate, effectively improving practicality.

[0046] Embodiment 3;

[0047] This embodiment provides a core bending test tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0048] Furthermore, it also includes a buffer pad 5 , which is arranged on the support frame 2 and located above the boss 4 .

[0049] In the present technical solution, by providing a buffer pad 5, the clamping effect of the two support frames 2 when fixing the winding core is improved, ensuring that the winding core is not easily displaced after clamping and fixing. It can also avoid excessive clamping force of the clamping frame on the winding core, causing damage or deformation to the surface of the winding core, and preventing the accuracy of the measurement data from being affected.

[0050] Furthermore, the buffer pad 5 is provided with an arc-shaped groove, and the arc-shaped groove is adapted to the end structure of the winding core.

[0051] In the present technical solution, an arc-shaped groove adapted to the end of the winding core is designed to increase the contact area between the buffer pad 5 and the end of the winding core, so that the winding core is clamped more firmly and not easily displaced, thereby improving the clamping effect; in addition, the design of the arc-shaped groove makes the force distribution at the end of the winding core more uniform, reduces local pressure, and prevents deformation or damage caused by uneven pressure.

[0052] Embodiment 4:

[0053] This embodiment provides a core bending test tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0054] Furthermore, it also includes a sliding guide rail 6, which is arranged in the frame 1, and the two support frames 2 are slidably installed on the sliding guide rail 6.

[0055] In the present technical solution, the sliding guide rail 6 is provided to make the movement of the support frame 2 in the X direction smoother and faster, so that the staff can move the support frame 2 more easily and conveniently, and the practicability is high.

[0056] Furthermore, the distance measuring mechanism is arranged on the sliding guide rail 6. The distance measuring mechanism can be a laser distance meter or an infrared distance meter, or a scale line can be designed on the sliding guide rail 6. After the winding core is clamped and fixed by the two support frames 2, the staff can read and record the distance between the two support frames 2 in the X direction. Through this structural design, the length measurement of the winding core is more convenient, and the practicality is effectively improved.

[0057] Furthermore, it also includes a fixing pin 7, which is arranged on the support frame 2 and is used to fix the support frame 2 on the sliding guide rail 6. The support frame 2 is moved and adjusted along the X direction on the sliding guide rail 6. After the two support frames 2 are respectively pressed against the two ends of the winding core, the fixing pin 7 is used to fix the support frame 2 on the sliding guide rail 6, so that the winding core can be clamped and fixed.

[0058] Embodiment 5:

[0059] This embodiment provides a core bending test tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0060] Furthermore, the pressure mechanism comprises:

[0061] A driving motor 8, wherein the driving motor 8 is mounted on the frame 1;

[0062] A pressure rod 9, wherein the driving motor 8 controls the pressure rod 9 to move along the Y direction;

[0063] The head of the pressure rod 9 is used to abut against the winding core.

[0064] In this technical solution, when the tooling is working, the driving motor 8 controls the pressure rod 9 to move downward along Y, and the head of the pressure rod 9 abuts against the winding core, exerting pressure on the winding core, causing the winding core to deform. After the deformation degree of the winding core becomes smaller, the maximum pressure value is read and recorded by the pressure detector 3.

[0065] Furthermore, the head of the pressure rod 9 is in any one of a cylindrical or rectangular shape. Preferably, the head of the pressure rod 9 is designed to be rectangular, which increases the contact area between the head of the pressure rod 9 and the winding core, and can be better aligned with the winding core to ensure that it is located in the middle of the winding core, so that the winding core is more evenly stressed and the accuracy of the measured pressure value is improved.

[0066] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A core bending test tool, characterized in that: include: Rack (1); A support mechanism, the support mechanism comprising two support frames (2), the two support frames (2) being movably mounted in the frame (1) along the X direction, and a pressurized area for placing the winding core is formed between the two support frames (2); A pressure mechanism, the pressure mechanism is mounted on the frame (1) and is located above the pressurizing area, and is used to pressurize the winding core; A pressure detector (3), the pressure detector (3) being mounted on the pressure mechanism and used to measure and display the pressure applied by the pressure mechanism to the winding core; A distance measuring mechanism is used to detect and display the distance between two support frames (2) in the X direction.

2. A core bending test tool according to claim 1, characterized in that: Both support frames (2) are provided with a boss (4), and the boss (4) is used to support the winding core placed in the pressurized area.

3. A core bending test tool according to claim 2, characterized in that: It also comprises a buffer pad (5), which is arranged on the support frame (2) and is located above the boss (4).

4. A core bending test tool according to claim 3, characterized in that: The buffer pad (5) is provided with an arc-shaped groove, and the arc-shaped groove is adapted to the end structure of the winding core.

5. The core bending test tool according to claim 1, characterized in that: It also comprises a sliding guide rail (6), wherein the sliding guide rail (6) is arranged in the frame (1), and the two support frames (2) are slidably mounted on the sliding guide rail (6).

6. A core bending test tool according to claim 5, characterized in that: The distance measuring mechanism is arranged on the sliding guide rail (6).

7. A core bending test tool according to claim 6, characterized in that: The sliding guide rail (6) is provided with scale lines.

8. The core bending test tool according to claim 5, characterized in that: It also includes a fixing pin (7), which is arranged on the support frame (2) and is used to fix the support frame (2) on the sliding guide rail (6).

9. The core bending test tool according to claim 1, characterized in that: The pressure mechanism comprises: A drive motor (8), wherein the drive motor (8) is mounted on the frame (1); A pressure rod (9), wherein the driving motor (8) controls the pressure rod (9) to move along the Y direction; The head of the pressure rod (9) is used to abut against the winding core.

10. A core bending test tool according to claim 9, characterized in that: The head of the pressure rod (9) is in the shape of a cylinder or a cuboid.

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