Device for testing thickness elongation percentage of pole piece

Abstract

The utility model provides a device for testing the thickness elongation rate of a pole piece. The utility model provides a device for testing the thickness elongation of a pole piece. The device comprises a bottom plate and a plurality of transmission assemblies, the transmission assembly comprises a sliding rail and a driving mechanism, the sliding rail is vertically arranged on the bottom plate, a sliding part is arranged on the sliding rail, an electronic spiral micrometer is arranged on the sliding part, the detection end of the electronic spiral micrometer faces the bottom plate, and the detection end of the electronic spiral micrometer faces the driving mechanism. The driving mechanism is used for driving the sliding part to slide on the sliding rail when the pole piece is measured, so that the detection end of the electronic spiral micrometer abuts against the pole piece. The thicknesses of the pole pieces at multiple point positions are measured at the same time through the multiple transmission assemblies, the thickness elongation percentage is calculated, the testing efficiency is improved, and the calculation precision is also improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of battery test, in particular to a kind of thickness ductility test device of pole piece. BACKGROUND

[0002] Lithium ion battery is a kind of rechargeable battery, and the power supply of the electronic equipment such as mobile phone and notebook computer used by people in daily life is mostly lithium ion battery. In the manufacturing process of lithium ion battery, the pole piece needs to be rolled, and after the rolling operation is completed, the ductility of the pole piece also needs to be detected. At present, the ductility of the pole piece is mostly detected in the length and width directions before and after the ductility of the pole piece. For the battery pole piece, the ductility in the thickness direction is also an important parameter. When calculating the ductility in the thickness direction, the change of the thickness of the pole piece needs to be measured. In the prior art, in order to ensure the stability of the data, the pole piece needs to be sampled at multiple different points. This sampling method is time-consuming and laborious, and the measurement deviation is different for different people. SUMMARY

[0003] The utility model aims at providing a kind of thickness ductility test device of pole piece to solve the technical problems of low detection efficiency and poor measurement accuracy when measuring thickness ductility in the prior art.

[0004] The technical scheme of the utility model is as follows, a kind of thickness ductility test device of pole piece is provided, including bottom plate, multiple transmission assemblies;

[0005] The transmission assembly includes slide rail and driving mechanism, the slide rail is vertically arranged on the bottom plate, the slide rail is provided with sliding part, the electronic screw micrometer is arranged on the sliding part, the detection end head of the electronic screw micrometer faces the bottom plate, and the driving mechanism is used to drive the sliding part to slide on the slide rail when measuring the pole piece, so that the detection end head of the electronic screw micrometer is in contact with the pole piece.

[0006] Preferably, the driving mechanism includes screw rod and motor;

[0007] The sliding part is provided with a through hole matched with the screw rod, the screw rod is arranged in the through hole, one end of the screw rod is rotatably arranged on the bottom plate, and the other end of the screw rod is connected with the output shaft of the motor.

[0008] Preferably, the transmission assembly further includes support part;

[0009] The end of the slide rail away from the bottom plate is connected with the support part;

[0010] The screw rod passes through the support part and is connected with the output shaft of the motor.

[0011] Preferably, a fixing sleeve is arranged on the sliding part, and the electronic micrometer is arranged on the sliding part through the fixing sleeve.

[0012] Preferably, the device further comprises a plurality of first data lines, first ends of the first data lines being connected to the electronic micrometer, and second ends of the first data lines being used for connecting an external display device.

[0013] Preferably, the number of the transmission assemblies is 5.

[0014] Preferably, the device further comprises a back plate.

[0015] The back plate is vertically arranged at the edge of the bottom plate, and the sliding rail is attached to the back plate.

[0016] Preferably, the bottom plate and the back plate are integrally formed.

[0017] Preferably, the detection head of the electronic micrometer is a flat head.

[0018] Preferably, a second data line is arranged on the motor, a first end of the second data line being connected to the motor, and a second end of the second data line being used for connecting an external control center.

[0019] The beneficial effects of the utility model lie in that the rolled pole piece is placed on the bottom plate, the sliding part is driven to slide on the sliding rail through the driving mechanism, so that the detection head of the electronic micrometer arranged on the sliding part is abutted against the pole piece to measure the thickness of the pole piece, the thickness of the pole piece at multiple different points can be simultaneously measured through the electronic micrometer on each transmission assembly due to the existence of multiple transmission assemblies, and the thickness expansion rate of the pole piece before and after rolling is calculated according to the thickness of all points and the thickness of the pole piece before rolling. The pole piece thickness at multiple points is simultaneously measured through multiple transmission assemblies, and the thickness expansion rate is calculated, so that the test efficiency is enhanced, and the calculation accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the pole piece thickness expansion rate testing device.

[0021] Fig. 10 is a structural schematic view of the pole piece thickness expansion rate testing device. DETAILED DESCRIPTION

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] Figure 1 This is a schematic diagram of the electrode thickness elongation testing device according to an embodiment of the present invention. It should be noted that if substantially the same results are obtained, the embodiment of the present invention is not necessarily identical. Figure 1 The structures shown are limited. For example... Figure 1 As shown, the electrode thickness elongation testing device includes a base plate 10 and multiple transmission components 20. The transmission components 20 include a slide rail 21 and a drive mechanism 22. The slide rail 21 is vertically disposed on the base plate 10. A sliding part 30 is provided on the slide rail 21. An electronic micrometer 40 is provided on the sliding part 30. The detection end of the electronic micrometer 40 faces the base plate 10. The drive mechanism 22 is used to drive the sliding part 30 to slide on the slide rail 21 when measuring the electrode, so that the detection end of the electronic micrometer 40 abuts against the electrode.

[0025] In this embodiment, the rolled electrode sheet is placed on the base plate 10. The sliding part 30 is driven by the drive mechanism 22 to slide on the slide rail 21, thereby causing the detection end of the electronic micrometer 40 mounted on the sliding part 30 to hold the electrode sheet and measure its thickness. Since there are multiple transmission components 20, the electronic micrometer 40 on each transmission component 20 can simultaneously measure the thickness of multiple different points on the electrode sheet. Based on the thickness of all points and the thickness of the electrode sheet before rolling, the thickness elongation rate of the electrode sheet before and after rolling is calculated. By simultaneously measuring the electrode sheet thickness at multiple points and calculating the thickness elongation rate through multiple transmission components 20, the testing efficiency is enhanced and the calculation accuracy is improved. The surface of the base plate 10 is used as the reference plane for the electronic micrometer 40. The distance between the detection end and the reference plane is determined by the displacement sensor on the end, thereby obtaining the thickness of the electrode sheet to be tested.

[0026] In one specific embodiment, the thickness of the pole piece before rolling is generally fixed, and the thickness of the pole piece before rolling can also be tested by the thickness extension rate testing device in the embodiment. Thickness extension rate=(D1-D2) / D1*100%. Wherein, D1 is the thickness of the pole piece before rolling, and D2 is the thickness of the pole piece after rolling. After calculating the thickness extension rate of each point, the average value of the thickness extension rate of all point positions is the final thickness extension rate. By comparing the thickness extension rate of each point, the flatness of the pole piece after rolling can also be judged.

[0027] In some embodiments, as shown in Figure 1 The driving mechanism 22 includes a screw rod 221 and a motor 222. The sliding part 30 is provided with a through hole matched with the screw rod 221, and the screw rod 221 is arranged in the through hole. One end of the screw rod 221 is rotatably arranged on the bottom plate 10, and the other end of the screw rod 221 is connected to the output shaft of the motor 222.

[0028] In the embodiment, the sliding part 30 is connected to the screw rod 221 and the sliding rail 21. The screw rod 221 and the motor 222 form a screw rod 221 elevator. When the motor 222 drives the screw rod 221 to rotate, the sliding part 30 connected to the screw rod 221 moves linearly on the screw rod and the sliding rail 21, thereby adjusting the distance between the electronic screw micrometer 40 on the sliding part 30 and the bottom plate 10.

[0029] In one specific embodiment, the sliding part 30 and the screw rod 221 can be connected through a nut fixed on the sliding part 30 and matched with the screw rod 221.

[0030] In some embodiments, as shown in Figure 1 The transmission assembly 20 further includes a support part 223. One end of the sliding rail 21 away from the bottom plate 10 is connected to the support part 223. The screw rod 221 passes through the support part 223 and is connected to the output shaft of the motor 222.

[0031] In the embodiment, the support part 223 is provided with a hole through which the screw rod 221 passes. The support part 223 is used to fix the sliding rail 21 and the screw rod 221, and also used to bear the motor 222.

[0032] In some embodiments, the sliding part 30 is provided with a fixing sleeve 50, and the electronic screw micrometer 40 is arranged on the sliding part 30 through the fixing sleeve 50.

[0033] In the embodiment, the electronic micrometer 40 is fixed on the sliding part 30 through a fixing sleeve 50, a buffer space is added between the electronic micrometer 40 and the sliding part 30, and the electronic micrometer 40 is convenient to install and replace.

[0034] In some embodiments, as shown in Figure 1 The device further comprises a plurality of first data lines 60, first ends of the first data lines 60 are connected to the electronic micrometer 40, and second ends of the first data lines 60 are used to connect external display equipment.

[0035] In the embodiment, the measurement result of the electronic micrometer 40 is transmitted to the external display equipment through the first data lines 60.

[0036] In some embodiments, as shown in Figure 1 The number of the transmission assemblies 20 is 5.

[0037] In the embodiment, the number of the transmission assemblies 20 is 5, and the number of the corresponding sliding rails 21, driving mechanisms 22, sliding parts 30 and electronic micrometers 40 is also 5. The number setting is only a setting mode of a preferred embodiment, and is not limited. The number can be set according to actual needs and conditions.

[0038] In some embodiments, as shown in Figure 1 The device further comprises a back plate 70, the back plate 70 is vertically arranged at the edge of the bottom plate 10, and the sliding rail 21 is attached to the back plate 70.

[0039] In the embodiment, the back plate 70 can provide support for the sliding rail 21, thereby improving the overall stability of the device.

[0040] In some embodiments, the bottom plate 10 and the back plate 70 are integrally formed.

[0041] In the embodiment, the bottom plate 10 and the back plate 70 are integrally formed, which can further improve the overall stability of the device.

[0042] In some embodiments, as shown in Figure 1 The detection end of the electronic micrometer 40 is a flat end.

[0043] In the embodiment, in order to protect the pole piece from deformation when contacting the detection end, thereby affecting the product quality, the flat end is preferably selected as the detection end.

[0044] In some embodiments, the motor 222 is provided with a second data line 80, a first end of the second data line 80 is connected to the motor 222, and a second end of the second data line 80 is used to connect an external control center.

[0045] In the embodiment, the external control center and the motor 222 are connected through the second data line 80, the rotating speed and rotating direction of the motor 222 are controlled according to the signal of the external control center, and the device of the embodiment can realize more accurate detection control.

[0046] The utility model discloses a beneficial effect lies in: the pole piece after rolling is placed on the bottom plate 10, through the drive mechanism 22 drive sliding portion 30 slide on the slide rail 21, thereby drive the detection end head of electronic screw micrometer 40 of being established in sliding portion 30 bear pole piece to measure the thickness of pole piece, because there are multiple transmission assembly 20, therefore through the thickness of electronic screw micrometer 40 on every transmission assembly 20 can measure the thickness of pole piece multiple different point simultaneously, according to the thickness of all point and the thickness of pole piece before rolling, calculate the thickness of pole piece before and after rolling extension rate. Through multiple transmission assembly 20 simultaneously measure the thickness of pole piece of multiple point and calculate thickness extension rate, strengthen the test efficiency, also improved the calculation accuracy.

[0047] The above-mentioned is only the implementation mode of the embodiment of the utility model, and it should be pointed out here that for those skilled in the art, under the premise of not departing from the creative concept of the utility model, improvements can also be made, but these all belong to the protection scope of the utility model.

Claims

1. A device for testing the thickness and elongation of electrode sheets, characterized in that, Includes a base plate and multiple transmission components; The transmission assembly includes a slide rail and a drive mechanism. The slide rail is vertically mounted on the base plate and has a sliding part. An electronic micrometer is mounted on the sliding part, with the detection end of the electronic micrometer facing the base plate. The drive mechanism is used to drive the sliding part to slide on the slide rail when measuring the electrode, so that the detection end of the electronic micrometer abuts against the electrode.

2. The electrode thickness elongation testing device according to claim 1, characterized in that, The drive mechanism includes a lead screw and a motor; The sliding part is provided with a through hole that mates with the screw rod. The screw rod passes through the through hole, one end of the screw rod is rotatably mounted on the base plate, and the other end of the screw rod is connected to the output shaft of the motor.

3. The electrode thickness elongation testing device according to claim 2, characterized in that, The transmission assembly also includes a support section; The end of the slide rail away from the base plate is connected to the support portion; The lead screw passes through the support and connects to the output shaft of the motor.

4. The electrode thickness elongation testing device according to claim 1, characterized in that, The sliding part is provided with a fixed sleeve, and the electronic micrometer is mounted on the sliding part through the fixed sleeve.

5. The electrode thickness elongation testing device according to claim 1, characterized in that, The device also includes multiple first data lines, the first end of which is connected to the electronic micrometer, and the second end of which is used to connect to an external display device.

6. The electrode thickness elongation testing device according to claim 1, characterized in that, The number of transmission components is 5.

7. The electrode thickness elongation testing device according to claim 1, characterized in that, The device also includes a back plate; The back plate is vertically disposed at the edge of the base plate, and the slide rail is abutted against the back plate.

8. The electrode thickness elongation testing device according to claim 7, characterized in that, The base plate and the back plate are integrally formed.

9. The electrode thickness elongation testing device according to claim 1, characterized in that, The detection end of the electronic micrometer is a planar end.

10. The electrode thickness elongation testing device according to claim 2, characterized in that, The motor is provided with a second data line, the first end of which is connected to the motor, and the second end of which is used to connect to an external control center.

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