Feeding detection device and winding machine

Abstract

The invention relates to a feeding detection device and a winding machine, and relates to the technical field of lithium battery production, the feeding detection device comprises a frame body, a material taking structure, an ejection structure and an image detection module, and the frame body is fixedly provided with a pair of substrates which are arranged at an interval up and down; the pair of material taking structures are connected to the frame body in a sliding mode and located above the two base plates in a one-to-one correspondence mode, and each material taking structure reciprocates in the length direction of the corresponding base plate; the image detection module comprises a controller and a pair of cameras arranged on the frame body and located above the pair of substrates respectively, and the cameras are connected with the controller and used for obtaining shooting information of the to-be-detected material and transmitting the shooting information to the controller; the pair of ejection structures is located behind the cameras in a one-to-one correspondence mode in the pole piece conveying direction and arranged in a sliding mode in the width direction of the corresponding base plate. Wherein the controller is connected with the ejection mechanism, and when the controller judges that the pole pieces corresponding to the shooting information have defects, the controller controls the ejection mechanism to eject the corresponding pole pieces out. The quality of the battery cell can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery production, and in particular to a feeding detection device and a winding machine. Background Art

[0002] Lithium battery winding machine is a key equipment in the lithium battery manufacturing process, which is mainly used to wind the pole pieces (including positive pole pieces and negative pole pieces) and separators into battery cells according to a certain sequence and tension. This equipment has a direct impact on the performance and safety of lithium batteries.

[0003] The lithium battery winding machine includes a material taking device and a winding device. The material taking device transports the positive electrode sheet and the negative electrode sheet to the winding device, and the positive electrode sheet and the negative electrode sheet are wound together with the separator by the winding device to form a battery cell. In the actual production process, some electrode sheets may have defects such as damage and wrinkles, which affect the quality of the battery cell. Summary of the invention

[0004] The purpose of this application is to provide a feeding detection device and a winding machine, which can remove defective positive electrode sheets and ensure the quality of produced battery cells.

[0005] In the first aspect, a feeding detection device provided by the present application adopts the following technical solution:

[0006] A feeding detection device, comprising:

[0007] A frame, on which two substrates for supporting the positive electrode sheet and the negative electrode sheet are fixedly arranged, and a pair of the substrates are arranged in an upper and lower spaced relationship;

[0008] A pair of material taking structures, both of which are slidably connected to the frame and are located above the two substrates in a one-to-one correspondence, and each of the material taking structures reciprocates along the length direction of the corresponding substrate;

[0009] An image detection module, comprising a controller, and a pair of cameras disposed on the frame and respectively located above a pair of substrates, wherein the cameras are connected to the controller and are used to obtain photographic information of the material to be detected and transmit the information to the controller;

[0010] A pair of ejection structures are located behind the camera in a one-to-one correspondence along the electrode conveying direction and are slidably arranged along the width direction of the corresponding substrate;

[0011] Wherein, the controller is connected to the ejection structure, and when the controller determines that the electrode piece corresponding to the photographed information has a defect, the controller controls the ejection mechanism to eject the corresponding electrode piece.

[0012] Furthermore, it also includes a positioning component for positioning the camera, the positioning component includes a slide rail and a slider, the slide rail is fixed on the frame, one end of the slider is slidably connected to the slide rail, and the other end of the slider is detachably connected to the camera.

[0013] Furthermore, a movable groove is provided on the substrate for storing spare pole pieces;

[0014] A feeding structure is provided in the movable tank, and the feeding structure comprises:

[0015] A cover plate, rotatably connected to the base plate and flush with the upper side of the base plate, the cover plate being used to open or close the movable slot;

[0016] A bottom plate, slidably connected in the movable groove and having a sliding stroke along the width direction of the base plate;

[0017] The lifting member is fixed in the movable groove and plugged with the bottom plate to push the pole piece out of the movable groove.

[0018] Furthermore, two groups of positive plates or negative plates are arranged on the frame, and the material taking structure includes:

[0019] A splint, the length of which is adjustable;

[0020] A material taking driving member, connected to the clamping plate, and used to drive the clamping plate to move;

[0021] When the controller determines that the pole piece corresponding to the photographed information has defects, the controller controls the clamping plate to extend so as to synchronously clamp the two groups of pole pieces.

[0022] Furthermore, it also includes a material feeding drive, and the material feeding drive is drivingly connected to the cover plate;

[0023] A gear is arranged on the output shaft of the feeding driving member, and a tooth groove is provided on the side wall of the bottom plate, and the bottom plate is meshed with the gear through the tooth groove.

[0024] Furthermore, a limit plate is vertically extended upward on one side of the cover plate away from the frame body, and the clamping plate includes:

[0025] Fixed plate;

[0026] An upper clamping plate connected to one end of the fixing plate;

[0027] The lower clamping plate comprises a first connecting plate and a second connecting plate, wherein one end of the first connecting plate is connected to the fixing plate, and the other end of the first connecting plate is twisted with the second connecting plate.

[0028] Furthermore, it also includes a loading rack, which is installed on the substrate and is used to store pole pieces. A baffle is connected to the side of the loading rack close to the material picking structure. The baffle cooperates with the bottom wall gap of the loading rack to form a first notch for the material picking structure to clamp the pole piece.

[0029] Furthermore, a second notch is provided on the bottom wall of the loading rack, and a roller is rotatably connected in the second notch.

[0030] Furthermore, the ejection structure comprises:

[0031] Push board;

[0032] An ejector drive member, the ejector drive member is used to push the push plate to move;

[0033] A slide groove is provided on the base plate along its width direction, and the push plate at least partially extends into the slide groove.

[0034] In the second aspect, a feeding detection device provided by the present application adopts the following technical solution:

[0035] A winding machine comprises a winding device, an appearance detection module and the above-mentioned feeding detection device, wherein the feeding detection device is arranged on one side of the winding device, and the appearance detection module is arranged on the other side of the winding device for detecting the appearance of the product.

[0036] In summary, the present application includes at least one of the following beneficial technical effects:

[0037] 1. The present application is provided with an image detection module, which is connected to the ejection structure and the material replenishment. When the image detection module scans a defective electrode, the ejection mechanism will eject the defective electrode, and the material replenishment structure will promptly eject the spare electrode to replace the defective electrode, thereby ensuring the quality of the battery cell.

[0038] 2. The image detection module in the present application is connected to a retractable material picking structure. When the image detection module scans a defective electrode piece, the material picking structure is extended to simultaneously clamp two electrode pieces next time and replenish the material in the receiving slot in time.

[0039] 3. In the present application, a limit plate is vertically extended upward on the side of the cover away from the frame. When the cover closes the movable slot, the limit plate can limit the movement of the pole piece to reduce the possibility of the pole piece being offset. When the cover rotates and the movable slot is in an open state, the clamping structure clamps two pole pieces at the same time. The limit plate can intercept the pole piece that is relatively far away from the frame and make the pole piece fall onto the bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1It is a schematic diagram of the three-dimensional structure of the feeding detection device in this application;

[0041] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A;

[0042] Figure 3 yes Figure 1 A partial enlarged schematic diagram of part B;

[0043] Figure 4 It is a cross-sectional structural schematic diagram of the feeding detection device in the present application;

[0044] Figure 5 yes Figure 4 A partial enlarged schematic diagram of part C in the middle.

[0045] In the figure, 1, frame; 2, base plate; 21, movable groove; 3, material taking structure; 31, clamping plate; 311, fixing plate; 312, upper clamping plate; 313, lower clamping plate; 3131, first connecting plate; 3132, second connecting plate; 32, material taking drive member; 4, ejection structure; 41, push plate; 42, ejection drive member; 5, image detection module; 6, positioning assembly; 61, slide rail; 62, slider; 7, material feeding structure; 71, cover plate; 72, bottom plate; 721, tooth groove; 73, lifting member; 74, material feeding drive member; 75, gear; 8, loading rack; 81, first notch; 82, second notch; 9, baffle; 10, roller; 20, limit plate. DETAILED DESCRIPTION

[0046] The following will be combined with the attached Figure 1-5 The technical solution of the present application is described clearly and completely. The following embodiments are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application. In the following description, the same symbols are used to represent the same or equivalent elements, and repeated descriptions are omitted.

[0047] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present application are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] It should be further understood that the term “and / or” used in the specification and corresponding claims of this application refers to any and all possible combinations of one or more of the listed items.

[0050] A winding machine, referring to Figure 1 , including a coiling device, an appearance inspection module and the above-mentioned feeding inspection device, the feeding inspection device is arranged on one side of the coiling device, and the appearance inspection module is arranged on the other side of the coiling device. When producing battery cells, the positive electrode sheet, the negative electrode sheet and the separator are loaded at the feeding inspection device, transported to the coiling device, and transported to the next location after being wound to form a columnar battery cell.

[0051] In a specific embodiment, the coiling device has two conveyor belts (a main conveyor belt and a secondary conveyor belt) on the side away from the feeding detection device. A screening mechanical arm is arranged on the main conveyor belt, and the appearance detection module is arranged on the main conveyor belt and is wirelessly connected to the screening mechanical arm.

[0052] The appearance inspection module scans the appearance of the battery cell. When damage is found on the surface of the battery cell, the appearance inspection module will send a control signal to enable the screening robot arm to push the defective battery cell onto the secondary conveyor belt, thereby ensuring the yield rate of the product.

[0053] Further, refer to Figure 1 and Figure 2 The loading and detection device includes a frame 1 and a material picking structure 3, the frame 1, and two substrates 2 for supporting positive and negative electrodes are fixed on the frame 1; a pair of substrates 2 are spaced apart from each other, and a pair of material picking structures 3 are slidably connected to the frame 1, and are located one by one above the two substrates 2, and each material picking structure 3 moves back and forth along the length direction of the corresponding substrate 2.

[0054] When producing a battery cell, the positive electrode sheet is placed on one substrate 2 and the negative electrode sheet is placed on another substrate 2. The positive electrode sheet and the negative electrode sheet are clamped by the material taking structure 3 on the corresponding substrate 2 and then dragged.

[0055] Furthermore, there are two rotating feeding discs on the feeding detection device, and the two feeding discs are wound with diaphragms. When the positive electrode sheet and the negative electrode sheet are dragged, the diaphragm is unwound synchronously. The diaphragm is used to separate the positive electrode sheet and the negative electrode sheet, that is, the battery cell is wound by four layers of materials: a positive electrode sheet, a diaphragm, a negative electrode sheet, and a diaphragm.

[0056] Furthermore, each substrate 2 is correspondingly provided with an image detection module 5 and a pair of ejection structures 4. The image detection module 5 includes a controller, and a pair of cameras disposed on the frame 1 and respectively located above a pair of substrates 2. The cameras are connected to the controller to obtain photographic information of the material to be tested and transmit it to the controller;

[0057] A pair of ejection structures are located behind the camera in a one-to-one correspondence along the electrode conveying direction, and are slidably arranged along the width direction of the corresponding substrate; the controller is connected to the ejection structure 4, and when the controller determines that the electrode corresponding to the shooting information has defects (such as wrinkles or damage), the ejection mechanism is controlled to eject the corresponding electrode.

[0058] It should be noted that in this embodiment, the front end / rear end is related to the moving stroke of the pole piece. Specifically, the pole piece is first photographed by the camera and then passes through the ejection structure 4. That is, the camera is closer to the loading point of the pole piece than the ejection structure 4 in the length direction of the substrate 2.

[0059] Reference Figure 2 , and also includes a positioning component 6 for positioning the camera, the positioning component 6 includes a slide rail 61 and a slider 62, the slide rail 61 is fixed on the frame 1, one end of the slider 62 is slidably connected to the slide rail 61, and the other end of the slider 62 is detachably connected to the camera.

[0060] Reference Figure 1 and Figure 3 The ejection structure 4 has a reciprocating sliding stroke along the width direction of the substrate 2. Specifically, the ejection structure 4 includes a push plate 41 and an ejection driving member 42. The ejection driving member 42 can be specifically configured according to actual conditions. In a specific embodiment, the ejection driving member 42 can be configured as a linear cylinder. In another specific embodiment, the ejection driving member 42 can also be configured as an electric push rod, which can ensure that the push plate 41 can push the defective electrode off the substrate 2.

[0061] Furthermore, in a specific embodiment, a slide groove is provided on the substrate 2 along its width direction, and the push plate 41 at least partially extends into the slide groove. By partially extending the push plate 41 into the slide groove, the push plate 41 can stably contact the pole piece when pushing the pole piece on the substrate 2, thereby reducing the occurrence of empty push.

[0062] Furthermore, since the battery cell includes a positive electrode sheet and a negative electrode sheet, when any of the electrode sheets on the substrate 2 is damaged, the battery cell cannot be produced due to lack of material. At this time, the loading and detection device needs to be shut down and a new electrode sheet needs to be replenished to ensure that the loading and detection device continues to operate smoothly.

[0063] Therefore, in the present application, an active groove 21 is provided on the substrate 2 for storing spare pole pieces, and correspondingly, a material replenishing structure 7 is provided in the active groove 21 .

[0064] The material replenishing structure 7 can push the spare pole piece out of the movable groove 21 and replenish the material in time. By setting the material replenishing structure 7, the winding machine does not need to be shut down when the pole piece is detected to be damaged, which can ensure the continuous operation of the winding machine.

[0065] Specifically, refer to Figure 3 and Figure 4 The feeding structure 7 includes a cover plate 71, a bottom plate 72 and a lifting member 73. The cover plate 71 is rotatably connected to the base plate 2 and is flush with the upper side of the base plate 2. The cover plate 71 is used to open or close the movable groove 21; the bottom plate 72 is slidably connected to the movable groove 21 and has a sliding stroke along the width direction of the base plate 2; the lifting member 73 is fixed in the movable groove 21 and plugged with the bottom plate 72 to push the pole piece out of the movable groove 21.

[0066] The feeding action of the feeding structure 7 is as follows:

[0067] The cover plate 71 rotates to open the movable groove 21. At this time, the lifting member 73 moves vertically upward to push the pole piece on the lifting member 73. When the battery cell is wound, the lifting member 73 retreats, the cover plate 71 is reset, and the movable groove 21 is reclosed to ensure that the pole piece will not fall into the movable groove 21 when the material removal structure 3 pulls the pole piece.

[0068] In a specific embodiment, a plurality of pole pieces can be directly stored in the movable groove 21 , and the plurality of pole pieces can be ejected one by one by the lifting member 73 for material replenishment.

[0069] However, considering the situation that a plurality of pole pieces are directly stored in the movable slot 21 , these pole pieces are not scanned by the image detection module 5 , that is, a plurality of pole pieces stored in the movable slot 21 may also have defects.

[0070] Therefore, in another specific embodiment, two sets of pole pieces can be provided at one end of the substrate 2. Correspondingly, the material taking structure 3 includes a clamping plate 31 and a material taking driving member 32, and the material taking driving member 32 is connected to the clamping plate 31 to drive the clamping plate 31 to move;

[0071] The length of the clamping plate 31 is adjustable (electrically retractable). When the camera scans a defective pole piece, the clamping plate 31 is extended to synchronously clamp two sets of pole pieces.

[0072] After a defect is detected in a pole piece, the clamp 31 will clamp two pole pieces at the same time when clamping the pole piece next time. One pole piece will be loaded normally, and the pole piece relatively far away from the frame 1 will enter the movable groove 21, so that it can be replenished in time when a defect is detected next time.

[0073] It should be noted that, in this embodiment, when the feeding detection device is just started, the clamping plate 31 is in an extended state, so that when a defective electrode is detected, there is already a electrode in the movable slot 21 that can be replenished. If there are two consecutive electrode defects, it indicates that there may be problems with the electrode batch, and the feeding detection device is shut down.

[0074] Further, refer to Figure 1 and Figure 2 A loading rack 8 for storing pole pieces is installed at one end of each of the two substrates 2. A baffle 9 is connected to the side of the loading rack 8 close to the material taking structure 3. The baffle 9 is matched with the bottom wall gap of the loading rack 8 to form a first notch 81 for the material taking structure 3 to clamp the pole piece.

[0075] When two groups of pole pieces are placed on the loading rack 8 , the baffle 9 can limit the pole pieces so that the ends of the pole pieces remain flush, and the picking structure 3 clamps the pole pieces from the first notch 81 .

[0076] In a specific embodiment, a second notch 82 is provided on the bottom wall of the loading rack 8, and a roller 10 is rotatably connected in the second notch 82. When the material taking structure 3 clamps the electrode piece, the electrode piece will scrape against the bottom wall of the loading rack 8 and the electrode piece located at the upper position, and a small amount of debris will be generated (depending on the different materials of the electrode piece, the debris can be lithium cobalt oxide, graphite, lead oxide or nickel oxide), and this part of the debris will cause pollution to the environment.

[0077] By setting the roller 10 and the second notch 82, the roller 10 rotates to drive the pole piece to move, while reducing the degree of scratching, and the debris generated by the scratching can also be collected in the second notch 82, thereby better protecting the environment.

[0078] Further, refer to Figure 4 and Figure 5 In a specific embodiment, the feeding structure 7 also includes a feeding driving member 74, which is transmission-connected to the cover plate 71; a gear 75 is provided on the output shaft of the feeding driving member 74, and a tooth groove 721 is provided on the side wall of the bottom plate 72, and the bottom plate 72 is meshed with the gear 75 through the tooth groove 721.

[0079] When the feeding drive 74 drives the cover plate 71 to rotate and the receiving slot is in an open state, the feeding drive 74 also synchronously drives the bottom plate 72 to slide along the width direction of the base plate 2 through the gear 75 and the tooth groove 721. Through this connection method, one drive member can simultaneously drive the cover plate 71 to rotate and the bottom plate 72 to translate.

[0080] In addition, the feeding drive 74 and the lifting member 73 are both wirelessly connected to the controller. When the camera scans a pole piece with defects (such as wrinkles or damage), the feeding drive 74 and the lifting member 73 move synchronously.

[0081] That is, the lifting member 73 pushes out the pole piece in the accommodating groove for loading, and the bottom plate 72 that has been translated to the outside of the movable groove 21 will receive a pole piece. When the cover plate 71 closes the movable groove 21 again, the bottom plate 72 that receives a pole piece at this time retreats back into the movable groove 21 and supports the pole piece together with the lifting member 73.

[0082] Furthermore, in a specific embodiment, a suction cup may be provided at the top of the lifting member 73 to enhance the adsorption effect on the pole piece, thereby reducing the possibility that the pole piece in the movable groove 21 is displaced due to the sliding of the bottom plate 72 when the pole piece is lifted.

[0083] Further, refer to Figure 3 and Figure 4 The side of the cover plate 71 away from the frame 1 is vertically extended upward with a limit plate 20. When the cover plate 71 closes the movable groove 21, the limit plate 20 can limit the movement of the pole piece, reducing the possibility of the pole piece being offset; and when the cover plate 71 rotates and the movable groove 21 is in an open state, the clamping structure clamps two pole pieces at the same time, and the limit plate 20 can intercept the pole piece that is relatively far away from the frame 1, so that the pole piece falls onto the bottom plate 72. When the cover plate 71 is reset, the bottom plate 72 retreats into the movable groove 21, and the pole piece is supported by the bottom plate 72 and the lifting member 73.

[0084] Specifically, in a specific embodiment, the clamping plate 31 includes a fixed plate 311, an upper clamping plate 312 and a lower clamping plate 313, the upper clamping plate 312 is connected to one end of the fixed plate 311; the lower clamping plate 313 includes a first connecting plate 3131, a second connecting plate 3132 and a torsion spring, the first connecting plate 3131 is connected to the fixed plate 311, the second connecting plate 3132 is rotatably connected to the first connecting plate 3131, and the torsion spring is arranged at the connection point between the first connecting plate 3131 and the second connecting plate 3132, and the two ends are respectively against the first connecting plate 3131 and the second connecting plate 3132.

[0085] When the clamping plate 31 clamps the pole piece and drags the pole piece, the second connecting plate 3132 will contact the limiting plate 20. The second connecting plate 3132 will rotate due to the obstruction of the limiting plate 20. At this time, it is difficult for the clamping plate 31 to clamp the pole piece on the outside, and the pole piece naturally falls onto the bottom plate 72.

[0086] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A feeding detection device, characterized in that: include: A frame (1) on which two substrates (2) for supporting positive electrode sheets and negative electrode sheets are fixedly arranged, wherein a pair of the substrates (2) are arranged in an upper and lower spaced relationship; A pair of material taking structures (3), the pair of material taking structures (3) are both slidably connected to the frame (1), and are located one-to-one above the two substrates (2), and each of the material taking structures (3) reciprocates along the length direction of the corresponding substrate (2); An image detection module (5) comprises a controller and a pair of cameras arranged on the frame (1) and respectively located above a pair of substrates (2), wherein the cameras are connected to the controller and are used to obtain photographic information of the material to be detected and transmit the information to the controller; A pair of ejection structures (4) are located behind the camera in a one-to-one correspondence along the electrode conveying direction and are slidably arranged along the width direction of the corresponding substrate; The controller is connected to the ejection structure (4), and when the controller determines that the electrode piece corresponding to the photographed information has a defect, the controller controls the ejection mechanism to eject the corresponding electrode piece.

2. A feeding detection device according to claim 1, characterized in that: It also includes a positioning component (6) for positioning the camera, the positioning component (6) includes a slide rail (61) and a slider (62), the slide rail (61) is fixed on the frame (1), one end of the slider (62) is slidably connected to the slide rail (61), and the other end of the slider (62) is detachably connected to the camera.

3. A feeding detection device according to claim 1, characterized in that: The substrate (2) is provided with an active groove (21) for storing spare pole pieces, and a material replenishment structure (7) is arranged in the active groove (21), and the material replenishment structure (7) comprises: A cover plate (71) is rotatably connected to the base plate (2) and is flush with the upper side of the base plate (2), and the cover plate (71) is used to open or close the movable groove (21); A bottom plate (72) is slidably connected in the movable groove (21) and has a sliding stroke along the width direction of the base plate (2); The lifting member (73) is fixedly arranged in the movable groove (21) and is plugged into and matched with the bottom plate (72) to push the pole piece out of the movable groove (21).

4. A feeding detection device according to claim 3, characterized in that: The frame (1) is provided with two groups of positive plates or negative plates, and the material taking structure (3) comprises: A clamping plate (31), wherein the length of the clamping plate (31) is adjustable; A material taking driving member (32), connected to the clamping plate (31), and used for driving the clamping plate (31) to move; When the controller determines that the pole piece corresponding to the photographed information has a defect, the controller controls the clamping plate (31) to extend so as to synchronously clamp two groups of pole pieces.

5. A feeding detection device according to claim 3, characterized in that: It also includes a material feeding drive member (74), wherein the material feeding drive member (74) is drivingly connected to the cover plate (71); A gear (75) is arranged on the output shaft of the feeding driving member (74), and a tooth groove (721) is provided on the side wall of the bottom plate (72), and the bottom plate (72) is meshed with the gear (75) through the tooth groove (721).

6. A feeding detection device according to claim 3 or 5, characterized in that: A limit plate (20) extends vertically upward on one side of the cover plate (71) away from the frame body (1), and the clamping plate (31) comprises: A fixing plate (311); An upper clamping plate (312) connected to one end of the fixing plate (311); The lower clamping plate (313) includes a first connecting plate (3131) and a second connecting plate (3132), wherein one end of the first connecting plate (3131) is connected to the fixing plate (311), and the other end of the first connecting plate (3131) is twistedly connected to the second connecting plate (3132).

7. A feeding detection device according to claim 1, characterized in that: It also includes a loading rack (8), which is installed on the substrate (2) and is used to store the electrode pieces. A baffle (9) is connected to the side of the loading rack (8) close to the material removal structure (3), and the baffle (9) is gap-matched with the bottom wall of the loading rack (8) to form a first notch (81) for the material removal structure (3) to clamp the electrode piece.

8. A feeding detection device according to claim 7, characterized in that: A second notch (82) is provided on the bottom wall of the loading rack (8), and a roller (10) is rotatably connected in the second notch (82).

9. A feeding detection device according to claim 1, characterized in that: The ejection structure (4) comprises: Push plate (41); An ejection driving member (42), the ejection driving member (42) being used to push the push plate (41) to move; The base plate (2) is provided with a slide groove along its width direction, and the push plate (41) at least partially extends into the slide groove.

10. A winding machine, characterized in that: It comprises a coiling device, an appearance detection module and a feeding detection device as described in any one of claims 1 to 9, wherein the feeding detection device is arranged on one side of the coiling device, and the appearance detection module is arranged on the other side of the coiling device for detecting the appearance of the product.

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