Diaphragm withstand voltage testing device

Abstract

The utility model provides a diaphragm voltage resistance testing device which comprises a winding and unwinding mechanism, a testing mechanism and a control mechanism. The control mechanism is electrically connected with the winding and unwinding mechanism and the testing mechanism, the winding and unwinding mechanism can achieve automatic winding and unwinding of the diaphragm through the control mechanism, and the testing mechanism can conduct voltage resistance testing on the diaphragm. Through mutual cooperation of the winding and unwinding mechanism, the testing mechanism and the control mechanism, the winding and unwinding mechanism automatically winds and unwinds the diaphragm, the testing mechanism carries out voltage resistance testing on the diaphragm, and the whole diaphragm surface of the diaphragm can be measured.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a voltage withstand test device for a diaphragm. Background Art

[0002] A battery diaphragm refers to a layer of diaphragm material between the positive and negative electrodes of a battery, which is a very crucial part of the battery and has a direct impact on the safety and cost of the battery. Its main functions are: isolating the positive and negative electrodes and preventing electrons in the battery from freely passing through, while allowing ions in the electrolyte to freely pass between the positive and negative electrodes; in the past, the voltage withstand test of the diaphragm mainly adopted a static method, where a diaphragm was placed on a group of metal platforms, and then a metal plate or a rod-shaped metal block was placed on it. The metal platforms were connected to the metal plate or the rod-shaped metal block to a breakdown voltage tester to measure a value that could break down the diaphragm; however, the above method could not measure the entire film surface of the diaphragm, could not achieve automatic winding and unwinding, and could not characterize the actual voltage withstand situation of the entire roll of diaphragm. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is how to measure the entire film surface of the diaphragm.

[0004] The utility model solves the above technical problem by the following technical means:

[0005] A voltage withstand test device for a diaphragm includes a winding and unwinding mechanism (2), a test mechanism (3), and a control mechanism (5); the control mechanism (5) is electrically connected to the winding and unwinding mechanism (2) and the test mechanism (3). The winding and unwinding mechanism (2) can realize automatic winding and unwinding of the diaphragm through the control mechanism (5), and the test mechanism (3) can perform a voltage withstand test on the diaphragm.

[0006] Beneficial Effects: Through the mutual cooperation of the winding and unwinding mechanism, the test mechanism, and the control mechanism, the winding and unwinding mechanism automatically winds and unwinds the diaphragm, and the test mechanism performs a voltage withstand test on the diaphragm, so that the entire film surface of the diaphragm can be measured.

[0007] Furthermore, the winding and unwinding mechanism (2) includes an unwinding motor (21), an unwinding shaft (22), a winding motor (23), and a winding shaft (24). The unwinding motor (21) and the winding motor (23) are arranged along the X-axis. The unwinding motor (21) can drive the unwinding shaft (22) to rotate, and the winding motor (23) can drive the winding shaft (24) to rotate. The diaphragm can be sleeved and connected on the unwinding shaft (22) and the winding shaft (24). The unwinding motor (21) and the winding motor (23) are both electrically connected to the control mechanism (5).

[0008] Beneficial effects: Through the mutual cooperation of the unwinding motor, unwinding shaft, winding motor, winding shaft, and control mechanism, the diaphragm can be automatically unwound and wound.

[0009] Further, the unwinding and winding mechanism (2) further includes a tension tester (25). The tension tester (25) is arranged close to the diaphragm, and the tension tester (25) is electrically connected to the control mechanism (5).

[0010] Beneficial effects: Through the mutual cooperation of the tension tester and the control mechanism, the tension tester can detect the tension of the diaphragm, send a signal to the control mechanism, and the control mechanism adjusts the rotation speeds of the two motors according to the tension of the diaphragm to ensure that the diaphragm is fully unfolded and has a certain tension.

[0011] Further, the testing mechanism (3) includes a positive plate (31) and a negative plate (33). The positive plate (31) and the negative plate (33) are arranged adjacent to each other. The diaphragm can pass through between the positive plate (31) and the negative plate (33). The positive plate (31) and the negative plate (33) are both electrically connected to the control mechanism (5).

[0012] Further, the testing mechanism (3) further includes a driving component (32). The output end of the driving component (32) is fixed on the positive plate (31), so that the driving component (32) can drive the positive plate (31) to move closer to and away from the diaphragm. The driving component (32) is electrically connected to the control mechanism (5).

[0013] Beneficial effects: Through the setting of the driving component, the positive plate is advanced and retracted by the driving component. When a reel needs to be installed, the driving component retracts, leaving a gap between the positive and negative plates for placing the diaphragm. When the breakdown voltage of the diaphragm needs to be detected, the positive plate slowly approaches the diaphragm under the push of the driving component, so that the positive and negative plates can be closely attached to the diaphragm. When the diaphragm moves forward, the positive plate is automatically loosened.

[0014] Further, the driving component (32) is a hydraulic cylinder.

[0015] Further, it further includes a support base (1). The unwinding and winding mechanism (2) is fixed along the X-axis on the top plate of the support base (1). The testing mechanism (3) is arranged on the top plate of the support base (1) close to the diaphragm. The control mechanism (5) is fixed on the top plate of the support base (1).

[0016] Further, the support base (1) includes a support plate (11) and support legs (12). One support leg (12) is fixed at each of the four corners of the bottom wall of the support plate (11).

[0017] Further, it further includes a recording mechanism (4). The recording mechanism (4) is disposed close to the diaphragm, and the recording mechanism (4) is electrically connected to the control mechanism (5).

[0018] Beneficial effects: Through the setting of the recording mechanism, the surface of the diaphragm can be recorded throughout the process, and the generated image information is transmitted to the control mechanism.

[0019] Further, the recording mechanism (4) is a high-power camera. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the diaphragm withstand voltage test device according to the first embodiment of the present invention. Detailed Embodiments

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1

[0023] As Figure 1 shown, this embodiment provides a diaphragm withstand voltage test device, which includes a support base 1, a winding and unwinding mechanism 2, a testing mechanism 3, a recording mechanism 4, and a control mechanism 5.

[0024] As Figure 1 shown, the support base 1 includes a support plate 11 and support legs 12. A support leg 12 is fixed at each of the four corners of the bottom wall of the support plate 11. The winding and unwinding mechanism 2 is fixed on the top wall of the support plate 11 along the X axis. The winding and unwinding mechanism 2 can realize the automatic winding and unwinding of the diaphragm. The testing mechanism 3 and the recording mechanism 4 are sequentially arranged on the top wall of the support plate 11 close to the diaphragm. The control mechanism 5 is fixed on the top wall of the support plate 11. The control mechanism 5 is electrically connected to the winding and unwinding mechanism 2, the testing mechanism 3, and the recording mechanism 4 respectively.

[0025] As Figure 1As shown in the figure, the winding and unwinding mechanism 2 includes an unwinding motor 21, an unwinding shaft 22, a winding motor 23, a winding shaft 24, and a tension tester 25. The unwinding motor 21 and the winding motor 23 are fixedly arranged at intervals along the X-axis on the support plate 11. The output ends of the unwinding motor 21 and the winding motor 23 both penetrate and extend out of the support plate 11. An unwinding shaft 22 is fixed on the output end of the unwinding motor 21, and a winding shaft 24 is fixed on the output end of the winding motor 23. The unwinding motor 21 can drive the unwinding shaft 22 to rotate, and the winding motor 23 can drive the winding shaft 24 to rotate. A connected diaphragm is sleeved on the unwinding shaft 22 and the winding shaft 24. The tension tester 25 is arranged close to the diaphragm and is fixed on the top wall of the support plate 11. The unwinding motor 21, the winding motor 23, and the tension tester 25 are all electrically connected to the control mechanism 5.

[0026] As Figure 1 shown in the figure, the testing mechanism 3 includes a positive electrode plate 31, a driving component 32, and a negative electrode plate 33. The positive electrode plate 31 and the negative electrode plate 33 are arranged adjacent to each other. The diaphragm passes through between the positive electrode plate 31 and the negative electrode plate 33. The negative electrode plate 33 is fixed on the top wall of the support plate 11. A driving component 32 is fixed on the top wall of the support plate 11 near the positive electrode plate 31. The output end of the driving component 32 is fixed with the positive electrode plate 31. The driving component 32 can drive the positive electrode plate 31 to move closer to and away from the diaphragm. In this embodiment, the driving component 32 is a hydraulic cylinder. The positive electrode plate 31, the driving component 32, and the negative electrode plate 33 are all electrically connected to the control mechanism 5.

[0027] As Figure 1 shown in the figure, the recording mechanism 4 is a high-magnification camera. The recording mechanism 4 is arranged close to the diaphragm and is fixed on the top wall of the support plate 11. The recording mechanism 4 is electrically connected to the control mechanism 5. In this embodiment, the testing mechanism 3, the recording mechanism 4, and the tension tester 25 are arranged in sequence along the X-axis.

[0028] During use, first install the diaphragm roll on the unwinding shaft 22, and one end of the diaphragm is fixed to the winding shaft 24. When the winding motor 23 drives the winding shaft 24 to rotate, the unwinding motor 21 drives the unwinding shaft 22 to rotate. The unwinding motor 21 and the winding motor 23 rotate clockwise at the same time. In order to control the rotation speed of the two motors, a tension tester 25 is arranged at the flat end of the diaphragm. The tension tester 25 can detect the tension of the diaphragm and send a signal to the control mechanism 5. The control mechanism 5 adjusts the rotation speed of the two motors according to the tension of the diaphragm to ensure that the diaphragm is fully unfolded and has a certain tension.

[0029] To achieve the breakdown voltage test of the diaphragm, positive and negative plates are arranged on the support plate 11. The negative plate 33 is connected to the negative electrode and fixed on the support plate 11 to be flat and in contact with the diaphragm. The area of the positive plate 31 is smaller than that of the negative plate 33 and is also parallel to the diaphragm. The positive plate 31 is advanced and retracted by a driving hydraulic cylinder. When the reel needs to be installed, the hydraulic cylinder retracts to leave a gap between the positive and negative plates for placing the diaphragm. When the breakdown voltage of the diaphragm needs to be detected, the positive plate 31 slowly approaches the diaphragm under the push of the hydraulic cylinder, enabling the positive and negative plates to closely adhere to the diaphragm. When the diaphragm advances, the positive plate 31 is automatically released. The above operations are all controlled by the control mechanism 5 program. During the diaphragm voltage detection process, the breakdown voltage of the diaphragm is recorded by the control mechanism 5. At the same time, a high-power camera takes pictures of the diaphragm surface throughout the process, and the generated image information is transmitted to the control mechanism 5. When a roll of diaphragm is detected, the operator can copy the data generated in this test to a USB flash drive through the USB interface of the control mechanism 5 and view and analyze the data on a computer.

[0030] Test parameters: working voltage 0 - 20 KV, leakage current 0.1 - 12 mA.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A diaphragm withstand voltage testing device, characterized in that, It includes a winding and unwinding mechanism (2), a testing mechanism (3), and a control mechanism (5). The control mechanism (5) is electrically connected to the winding and unwinding mechanism (2) and the testing mechanism (3). The winding and unwinding mechanism (2) can automatically wind and unwind the diaphragm through the control mechanism (5), and the testing mechanism (3) can perform a withstand voltage test on the diaphragm.

2. The diaphragm withstand voltage test device according to claim 1, characterized in that: The winding and unwinding mechanism (2) includes an unwinding motor (21), an unwinding shaft (22), a winding motor (23), and a winding shaft (24). The unwinding motor (21) and the winding motor (23) are arranged along the X-axis. The unwinding motor (21) can drive the unwinding shaft (22) to rotate, and the winding motor (23) can drive the winding shaft (24) to rotate. The diaphragm can be sleeved and connected on the unwinding shaft (22) and the winding shaft (24). The unwinding motor (21) and the winding motor (23) are both electrically connected to the control mechanism (5).

3. The diaphragm withstand voltage testing device according to claim 2, characterized in that: The winding and unwinding mechanism (2) further includes a tension tester (25). The tension tester (25) is arranged close to the diaphragm and is electrically connected to the control mechanism (5).

4. The diaphragm withstand voltage testing device according to claim 1, characterized in that: The testing mechanism (3) includes a positive electrode plate (31) and a negative electrode plate (33). The positive electrode plate (31) and the negative electrode plate (33) are arranged adjacent to each other. The diaphragm can pass between the positive electrode plate (31) and the negative electrode plate (33). The positive electrode plate (31) and the negative electrode plate (33) are both electrically connected to the control mechanism (5).

5. The diaphragm withstand voltage testing device according to claim 4, characterized in that: The testing mechanism (3) further includes a driving assembly (32). The output end of the driving assembly (32) is fixed on the positive electrode plate (31), so that the driving assembly (32) can drive the positive electrode plate (31) to move closer to and away from the diaphragm. The driving assembly (32) is electrically connected to the control mechanism (5).

6. The diaphragm withstand voltage testing device according to claim 5, characterized in that: The driving assembly (32) is a hydraulic cylinder.

7. A diaphragm withstand voltage test device according to claim 1, characterized in that: It further includes a support base (1). The winding and unwinding mechanism (2) is fixed along the X-axis on the top plate of the support base (1). The testing mechanism (3) is arranged close to the diaphragm on the top plate of the support base (1). The control mechanism (5) is fixed on the top plate of the support base (1).

8. The diaphragm withstand voltage testing device according to claim 7, characterized in that: The support base (1) includes a support plate (11) and support legs (12). One support leg (12) is fixed at each of the four corners of the bottom wall of the support plate (11).

9. The diaphragm withstand voltage test device according to claim 1, characterized in that: It further includes a recording mechanism (4). The recording mechanism (4) is arranged close to the diaphragm and is electrically connected to the control mechanism (5).

10. A diaphragm withstand voltage testing device according to claim 9, characterized in that: The recording mechanism (4) is a high-power camera.

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