Pole piece and diaphragm wrinkle detection device

Abstract

The utility model discloses a pole piece and diaphragm wrinkle detection device, which is used for detecting the surface flatness of two pole pieces and two diaphragms before being wound to a winding needle, and comprises two deviation rectification clamping roller groups, two diaphragm passing roller groups and four groups of detection mechanisms, the two deviation rectification clamping roller groups are distributed on the side surface of the winding needle at intervals and respectively guide one pole piece, and the two diaphragm passing roller groups are arranged on the side surface of the winding needle; the two diaphragm passing roller sets and the two deviation correction clamping roller sets are distributed in a staggered mode and guide the diaphragms respectively so that the diaphragms can be connected to the winding needle in a tensioned mode, and the four sets of detection mechanisms are used for detecting whether the diaphragms are wound to the winding needle or not before the diaphragms are wound to the winding needle or not. And the surface flatness of the two pole pieces and the two diaphragms in the tensioning state is improved. According to the utility model, the production safety of the battery is improved, and meanwhile, the detection accuracy is improved by independently carrying out wrinkle detection on the pole piece and the diaphragm.

Description

Technical Field

[0001] This utility model relates to the technical field of battery manufacturing, and in particular to a device for detecting wrinkles in electrode sheets and separators. Background Technology

[0002] In the manufacturing process of cylindrical lithium batteries, the winding process is a key process, which mainly involves winding the positive electrode sheet, separator, negative electrode sheet, and separator in sequence.

[0003] During the winding process, due to factors such as the incoming electrode material and the manufacturing precision of the equipment, random wrinkling may occur in the separator during the pre-winding process and during the insertion of the positive and negative electrodes. This can cause the equipment to fail to identify the wrinkled areas, resulting in material loss and lithium plating on the surface near the wrinkled areas of the electrodes and separator, which increases the safety risks of the battery. Utility Model Content

[0004] In view of the above-mentioned problems in the existing winding process, the present invention aims to provide a simple and highly accurate electrode and diaphragm wrinkle detection device.

[0005] The specific technical solution is as follows:

[0006] An electrode and diaphragm wrinkle detection device is used to detect the surface flatness of two electrodes and two diaphragms before they are wound onto the winding needle, comprising:

[0007] Two sets of correction clamps are spaced apart on the side of the winding needle and each guides one of the electrodes, and the electrodes are tensioned and connected to the winding needle.

[0008] Two diaphragm roller groups are staggered with two correction roller groups and each guides one diaphragm so that the diaphragm is tautly connected to the winding needle.

[0009] Four sets of testing mechanisms are used to detect the surface flatness of the two electrodes and the two diaphragms before they are wound into the winding needle and are under tension.

[0010] As a preferred embodiment, each of the aforementioned testing mechanisms is a 3D measuring instrument.

[0011] In a preferred embodiment, the two 3D measuring instruments are respectively oriented toward the two electrodes between the two correction clamping rollers and the winding needle.

[0012] In a preferred embodiment, each of the diaphragm roller groups includes: two diaphragm rollers, the two diaphragm rollers being arranged in parallel, and the diaphragm being sequentially connected to the winding needle by passing through the two diaphragm rollers;

[0013] The other two 3D measuring instruments are respectively directed toward the two diaphragms between the two diaphragm rollers of the two diaphragm roller groups.

[0014] In a preferred embodiment, one of the diaphragms is an upper diaphragm, and the other diaphragm is a lower diaphragm.

[0015] In a preferred embodiment, each of the correction roller groups includes two correction rollers, which are parallel and spaced apart, and the distance between the two correction rollers matches the thickness of the electrode sheet. The electrode sheet passes through the space between the two correction rollers and is connected to the winding needle.

[0016] In a preferred embodiment, one of the electrodes is a positive electrode and the other is a negative electrode.

[0017] In a preferred embodiment, the system also includes a worktable, on which the two sets of correction rollers, the two sets of diaphragm rollers, and the four sets of detection mechanisms are all mounted.

[0018] In a preferred embodiment, a turntable is also rotatably mounted on the worktable, and the winding needle is eccentrically and rotatably mounted on the turntable.

[0019] In a preferred embodiment, there are three winding needles, which are evenly distributed along the circumference of the turntable, and two of the electrode sheets and two of the diaphragm sheets are connected to one of the winding needles.

[0020] The positive effects of the above technical solution compared with the existing technology are:

[0021] This invention uses four sets of detection mechanisms to detect the surface flatness of the two electrodes and two separators before they are wound into the winding needle and under tension, in order to determine whether wrinkles have appeared on the electrodes and separators. This allows for the timely removal of abnormal cores, improving battery production safety. Furthermore, by separately detecting wrinkles on the electrodes and separators, the accuracy of the detection is improved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an electrode and diaphragm wrinkle detection device according to the present invention;

[0023] In the attached diagram: 1. Workbench; 2. Electrode; 3. Diaphragm; 4. Correcting roller assembly; 5. Diaphragm roller assembly; 6. 3D measuring instrument; 7. Winding needle; 8. Turntable; 41. Correcting roller; 51. Diaphragm roller. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Figure 1 This is a schematic diagram of the structure of an electrode and diaphragm wrinkle detection device according to the present invention, as shown below. Figure 1 The diagram illustrates a preferred embodiment of a device for detecting wrinkles in electrode sheets 2 and diaphragms 3. This device detects the surface flatness of the two electrode sheets 2 and two diaphragms 3 before they are wound onto the winding needle 7. It includes two sets of alignment rollers 4, two sets of diaphragm rollers 5, and four sets of detection mechanisms. The two sets of alignment rollers 4 are spaced apart on the side of the winding needle 7 and each guides an electrode sheet 2, ensuring the electrode sheet 2 is tensioned and connected to the winding needle 7. The two sets of diaphragm rollers 5 are staggered with the two sets of alignment rollers 4 and each guides a diaphragm 3, ensuring the diaphragm 3 is tensioned and connected to the winding needle 7. The four sets of detection mechanisms are used to detect the surface flatness of the two electrode sheets 2 and two diaphragms 3 before they are wound onto the winding needle 7 and are in a tensioned state.

[0028] In this embodiment, four sets of detection mechanisms are used to detect the surface flatness of the two electrode sheets 2 and the two separators 3 before they are wound into the winding needle 7 and are under tension, so as to determine whether the electrode sheets 2 and the separators 3 have wrinkles. In this way, abnormal cores can be removed in time, which improves the safety of battery production. At the same time, by separately detecting wrinkles on the electrode sheets 2 and the separators 3, the accuracy of detection is improved.

[0029] Furthermore, as a preferred embodiment, each detection mechanism is a 3D measuring instrument 6. When wrinkles appear on the diaphragm 3 / electrode 2, a height difference appears on the surface of the diaphragm 3 / electrode 2. At this time, the 3D measuring instrument 6 detects the height difference and can use the height difference formed by the height measurement data to represent the color change image, thereby analyzing and determining whether there are wrinkles, and transmitting the determination result to the PLC. If the core that has been wound at the winding station is determined to be wrinkled, it will be rejected as the core moves to the subsequent station.

[0030] Specifically, the 3D measuring instrument 6 is an existing mature component, and its specific structure and principle will not be described in detail in this article.

[0031] Furthermore, in a preferred embodiment, the two 3D measuring instruments 6 are respectively oriented toward the two pole pieces 2 between the two correction clamping roller groups 4 and the winding needle 7.

[0032] Furthermore, as a preferred embodiment, each diaphragm roller group 5 includes: two diaphragm rollers 51, which are arranged in parallel, and the diaphragm 3 passes through the two diaphragm rollers 51 in sequence and is connected to the winding needle 7. When the diaphragm 3 passes through the two diaphragm rollers 51, it is in a tensioned state under the action of tension; in addition, two 3D measuring instruments 6 are respectively directed toward the two diaphragms 3 between the two diaphragm rollers 51 of the two diaphragm roller groups 5.

[0033] Furthermore, in a preferred embodiment, one diaphragm 3 is an upper diaphragm 3, and the other diaphragm 3 is a lower diaphragm 3.

[0034] Furthermore, as a preferred embodiment, each correction roller assembly 4 includes two correction rollers 41, which are parallel and spaced apart, and the distance between the two correction rollers 41 matches the thickness of the electrode 2. The electrode 2 passes through the space between the two correction rollers 41 and is connected to the winding needle 7. The electrode 2 is in a tensioned state under the action of tension through the two correction rollers 41.

[0035] Furthermore, in a preferred embodiment, one electrode 2 is a positive electrode 2 and the other electrode 2 is a negative electrode 2.

[0036] Furthermore, as a preferred embodiment, it also includes a worktable 1, two sets of correction rollers 4, two sets of diaphragm rollers 5, and four sets of detection mechanisms, all of which are installed on the worktable 1.

[0037] Furthermore, as a preferred embodiment, a turntable 8 is rotatably mounted on the workbench 1, and the winding needle 7 is eccentrically and rotatably mounted on the turntable 8. The workbench 1 has three stations distributed along the circumference of the turntable 8. The three stations are the first station, the second station, and the third station. When the turntable 8 carries the winding needle 7 to the first station, the winding process is performed. When it rotates to the second station, the diaphragm 3 is cut by the diaphragm 3 cutter. When it rotates to the third station, the core with abnormal wrinkles is rejected.

[0038] Furthermore, as a preferred embodiment, there are three winding needles 7, which are evenly distributed along the circumference of the turntable 8, and the two pole pieces 2 and the two diaphragm pieces 3 are connected to one of the winding needles 7.

[0039] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for detecting wrinkles in electrodes and diaphragms, used to detect the surface flatness of two electrodes and two diaphragms before they are wound onto the winding needle, characterized in that, include: Two sets of correction clamps are spaced apart on the side of the winding needle and each guides one of the electrodes, and the electrodes are tensioned and connected to the winding needle. Two diaphragm roller groups are staggered with two correction roller groups and each guides one diaphragm so that the diaphragm is tautly connected to the winding needle. Four sets of testing mechanisms are used to detect the surface flatness of the two electrodes and the two diaphragms before they are wound into the winding needle and are under tension.

2. The electrode and diaphragm wrinkle detection device according to claim 1, characterized in that, Each of the aforementioned testing mechanisms is a 3D measuring instrument.

3. The electrode and diaphragm wrinkle detection device according to claim 2, characterized in that, The two 3D measuring instruments are respectively oriented towards the two electrode plates between the two correction clamping roller groups and the winding needle.

4. The electrode and diaphragm wrinkle detection device according to claim 3, characterized in that, Each of the diaphragm roller groups includes: two diaphragm rollers, the two diaphragm rollers are arranged in parallel, and the diaphragm passes through the two diaphragm rollers in sequence and is connected to the winding needle; The other two 3D measuring instruments are respectively directed toward the two diaphragms between the two diaphragm rollers of the two diaphragm roller groups.

5. The electrode and diaphragm wrinkle detection device according to claim 4, characterized in that, One of the diaphragms is an upper diaphragm, and the other diaphragm is a lower diaphragm.

6. The electrode and diaphragm wrinkle detection device according to claim 1, characterized in that, Each of the aforementioned alignment clamps includes two alignment rollers, which are parallel and spaced apart, and the distance between the two alignment rollers matches the thickness of the electrode sheet. The electrode sheet passes through the space between the two alignment rollers and is connected to the winding needle.

7. The electrode and diaphragm wrinkle detection device according to claim 1, characterized in that, One of the electrodes is a positive electrode, and the other electrode is a negative electrode.

8. The electrode and diaphragm wrinkle detection device according to claim 1, characterized in that, It also includes a workbench, on which the two sets of the aforementioned correction clamping rollers, the two sets of the aforementioned diaphragm rollers, and the four sets of the aforementioned detection mechanisms are all installed.

9. The electrode and diaphragm wrinkle detection device according to claim 8, characterized in that, A turntable is also rotatably mounted on the workbench, and the winding needle is eccentrically and rotatably mounted on the turntable.

10. The electrode and diaphragm wrinkle detection device according to claim 9, characterized in that, The winding needles are three in number and are evenly spaced along the circumference of the turntable. The two electrode plates and the two diaphragm plates are connected to one of the winding needles.

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