Roller passing mechanism and pole piece conveying device

Abstract

The utility model discloses a roller passing mechanism and a pole piece conveying device, and belongs to the technical field of lithium battery production equipment. The roller passing mechanism comprises a conveying roller, an installation support and a smoothing plate, the conveying roller is used for guiding the pole piece in conveying, the first end of the installation support is in transmission connection with one end of the conveying roller, the first end of the smoothing plate is installed at the second end of the installation support, and the smoothing plate corresponds to the position of a pole lug on the pole piece conveyed on the conveying roller. The second end of the flattening plate extends towards the pole piece input side, the middle of the flattening plate is arranged in a protruding mode towards the conveying roller so that a flattening channel can be formed between the flattening plate and the conveying roller, the pole piece penetrates through the position between the second end of the flattening plate and the conveying roller and enters the flattening channel, and the middle of the flattening plate is matched with the conveying roller to flatten a pole lug in the flattening channel. According to the electrode tab flattening device, in the process that the electrode tab penetrates through the position between the flattening plate and the conveying roller and enters the flattening channel, the flattening plate flattens and guides the electrode tab, so that the electrode tab is prevented from being folded in the process that the electrode piece is conveyed by the conveying roller.

Description

Technical Field

[0001] The present application belongs to the technical field of lithium battery production equipment. Specifically, the present application relates to a roller mechanism and a pole piece conveying device. Background Art

[0002] In the production process of lithium batteries, the pole pieces are loaded in the form of rolls. Specifically, the pole pieces are fixed by the unwinding mechanism and released at a predetermined speed, and then the pole pieces are guided and output through the transmission rollers. The pole tabs are arranged at intervals on the pole pieces. During the transportation of the pole pieces, the pole tabs may be folded when passing through the transmission rollers. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present utility model provides a roller mechanism and a pole piece conveying device to ensure that the pole ear will not be folded during the pole piece transmission process.

[0004] In order to solve the above problems, the technical solutions adopted in this application are as follows:

[0005] An example of the present application provides a roller-passing mechanism, including a transmission roller, a mounting bracket and a smoothing plate, the transmission roller is used to guide the pole piece in transmission, the first end of the mounting bracket is transmission-connected to one end of the transmission roller, the first end of the smoothing plate is mounted on the second end of the mounting bracket, the smoothing plate corresponds to the position of the pole ear on the pole piece transported on the transmission roller, the second end of the smoothing plate extends toward the side of the pole piece input, the middle part of the smoothing plate is protruded toward the transmission roller to form a smoothing channel between the transmission roller, the pole piece passes through between the second end of the smoothing plate and the transmission roller and enters the smoothing channel, the middle part of the smoothing plate cooperates with the transmission roller to smooth the pole ear in the smoothing channel.

[0006] The roller-passing mechanism provided in the present application utilizes a mounting bracket to configure a smoothing plate for the transmission roller. The smoothing plate corresponds to the position of the pole ear, the smoothing plate extends toward the side of the material belt input, and the middle part of the smoothing plate is protruded toward the transmission roller to form a smoothing channel between the transmission roller. Therefore, in the process of the pole ear passing between the smoothing plate and the transmission roller and entering the smoothing channel, the smoothing plate guides and smoothes the pole ear, thereby preventing the pole ear from folding when the pole piece is being transmitted by the transmission roller.

[0007] According to some examples of the present application, the mounting bracket includes a mounting block, a connecting shaft and a mounting seat. The smoothing plate is adjustably mounted on the first end of the connecting shaft through the mounting block, and the second end of the connecting shaft is adjustably mounted on the end of the corresponding transmission roller through the mounting seat.

[0008] The smoothing plate is installed on the transmission roller through the cooperation of the mounting block, the connecting shaft and the mounting seat, so as to facilitate the adjustment of the position of the smoothing plate and ensure that the smoothing plate can be aligned with the pole ear and has a better smoothing effect.

[0009] In some examples of the present application, an oblong hole extending along the radial direction of the conveying roller is formed at the first end of the flattening plate, and the flattening plate is adjustably mounted on the mounting block through the oblong hole.

[0010] The oblong hole opened at the first end of the flattening plate facilitates adjusting the distance between the flattening plate and the conveying roller, and further adjusting the flattening degree of the tab.

[0011] In some examples of the present application, the mounting seat includes a fixed part and a movable part. The fixed part extends along the radial direction of the conveying roller, and a plurality of mounting positions are distributed at intervals along the radial direction of the conveying roller on the fixed part. The movable part is detachably connected to one of the mounting positions, and the second end of the connecting shaft is mounted on the movable part.

[0012] Selecting different mounting positions to connect the fixed part and the movable part makes the mounting seat have different lengths in the radial direction, and the distance between the flattening plate and the conveying roller is also adjusted accordingly, thereby adjusting the flattening degree of the tab.

[0013] In some examples of the present application, the flattening plate is an insulating plate.

[0014] The insulating plate helps to avoid affecting the tab made of metal material, such as causing damage.

[0015] In some examples of the present application, the conveying roller includes a rotating shaft and a roller. The roller is detachably mounted on the rotating shaft. The body of the roller is made of insulating material, or an insulating layer is coated on the surface of the roller in contact with the conveyed pole piece.

[0016] The body of the roller with an insulated surface helps to avoid affecting the pole piece and the tab, such as causing damage.

[0017] Another example of the present application provides a pole piece conveying device, which includes a mounting frame and a plurality of over-roller mechanisms. Both ends of each over-roller mechanism are drivingly connected to the mounting frame, and the conveying rollers of the plurality of over-roller mechanisms are arranged in parallel.

[0018] Using the mounting frame to support the plurality of over-roller mechanisms improves the stability of the support for the over-roller mechanisms, realizes flattening the tab while stably conveying the pole piece, and avoids affecting the alignment between the flattening plate and the tab due to unstable support.

[0019] In some examples of the present application, adjacent over-roller mechanisms are arranged in a staggered manner in the vertical direction.

[0020] The over-roller mechanisms arranged in a staggered manner can prevent the tab from being folded over when the pole piece is conveyed straight up and down.

[0021] In some examples of the present application, one over-roller mechanism is movably arranged on the mounting frame along the vertical direction.

[0022] A roller passing mechanism moves up and down vertically on the mounting frame, driving the corresponding transfer roller to move up and down, thereby adjusting the length of the pole piece passing through the transfer roller and achieving the buffering of the pole piece.

[0023] According to some examples of the present application, a transfer roller located at the output end of the pole piece conveying device is connected to the driving mechanism and rotates under the action of the driving mechanism.

[0024] By additionally configuring a driving mechanism for a transfer roller, transmission power can be provided in the transmission direction of the pole piece, avoiding the pole piece from slipping due to too long a transmission interval. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the operating state of a pole piece conveying device provided by an embodiment of the present application;

[0026] Figure 2 It is a schematic structural diagram of a roller passing mechanism provided by an embodiment of the present application;

[0027] Figure 3 It is a schematic structural diagram of a roller passing mechanism provided by an embodiment of the present application;

[0028] Figure 4 It is a schematic diagram of the roller passing mechanism provided by an embodiment of the present application being movably arranged along the vertical direction;

[0029] In the figure:

[0030] 1. Roller passing mechanism; 2. Mounting frame; 3. Pole piece;

[0031] 10. Transfer roller; 101. Rotating shaft; 102. Drum;

[0032] 11. Mounting bracket; 111. Mounting block; 112. Connecting shaft; 113. Mounting seat;

[0033] 1131. Fixed part; 11311. Mounting position; 1132. Movable part;

[0034] 12. Flattening plate; 121. Oval hole;

[0035] 21. Mounting plate; 22. Connecting plate;

[0036] 4. Lifting bracket; 41. Support seat; 42. Moving seat; 43. Lifting motor;

[0037] 5. Driving mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0039] In the production process of lithium batteries, the electrode sheets are fed in the form of material rolls through unwinding and transmission. Tab ears made of metal materials are formed at positions close to the edges on both sides of the electrode sheets (which are in the form of continuous strips after unwinding). Since the tab ears protrude outside the electrode sheet strip and have a discontinuous and intermittent structure, and are extremely thin in thickness, the tab ears are prone to folding during the transmission by the guide rollers. The folded tab ears are deformed, for example, bent or folded, which will affect the quality of the produced battery cells. For example, folding will cause poor contact between the electrode sheets and hinder current transmission, thereby affecting the discharge performance and capacity of the battery.

[0040] Therefore, the present application provides a guide roller mechanism and an electrode sheet conveying device, by configuring a flattening plate to flatten the tab ears during the transmission of the electrode sheets, so as to ensure that the tab ears will not be folded.

[0041] Refer to Figure 3 as shown, and in combination with Figure 1 and Figure 2As shown, a roller passing mechanism 1 provided by an embodiment of the present application includes a transmission roller 10, a mounting bracket 11, and a flattening plate 12. One end of the mounting bracket 11 is connected to the transmission roller 10, and the other end of the mounting bracket 11 is connected to the flattening plate 12. Here, the mounting bracket 11 provides stable support for the flattening plate 12 and positions the flattening plate 12 at a desired position (corresponding to the position of the tab on the electrode sheet 3). In this embodiment, the electrode sheet 3 released from the material roll is transmitted under the guidance of the transmission roller 10. The first end of the mounting bracket 11 is drivingly connected to one end of the transmission roller 10, and the second end of the mounting bracket 11 is connected to the first end of the flattening plate 12 to realize the installation of the flattening plate 12. During the transmission of the electrode sheet 3 by the transmission roller 10, the position of the flattening plate 12 corresponds to that of the tab on the electrode sheet 3. The second end of the flattening plate 12 extends toward the side where the electrode sheet 3 is input. For the middle part of the flattening plate 12 along the transmission direction of the electrode sheet 3, this middle part bulges toward the transmission roller 10 and has a arched curved surface. A flattening channel is formed between this curved surface and the transmission roller 10. The electrode sheet 3 passes through between the second end of the flattening plate 12 and the transmission roller 10 and enters the flattening channel. The curved surface formed by the convex setting smoothly contacts the tab during the process of the electrode sheet 3 entering the flattening channel and guides the tab, and the middle part of the flattening plate 12 cooperates with the transmission roller 10 to flatten the tab in the flattening channel. Based on the foregoing description, during the process of transmitting the electrode sheet 3, the roller passing mechanism 1 effectively flattens the tab on the electrode sheet 3, thus avoiding the folding of the tab on the electrode sheet 3.

[0042] The roller passing mechanism 1 of this embodiment uses the mounting bracket 11 to configure the flattening plate 12 for the transmission roller 10, and the position of the flattening plate 12 corresponds to that of the tab. Therefore, for any structure, as long as it can connect and support the flattening plate 12 and position the flattening plate 12 at a position corresponding to the tab, it can be used as an implementation manner of the mounting bracket 11. In some embodiments of the present application, the position of the flattening plate 12 is adjustable, especially the position of the flattening plate 12 in the radial direction of the transmission roller 10 is adjustable to adapt to the production requirements of different specifications of electrode sheets 3 and the change in the angle at which the electrode sheet 3 enters the roller passing mechanism 1, and it can avoid affecting the position alignment between the flattening plate 12 and the tab and the flattening effect of the flattening plate 12 on the tab due to these changes.

[0043] To this end, in some embodiments, the mounting bracket 11 includes a mounting block 111, a connecting shaft 112, and a mounting seat 113. The ironing plate 12 is adjustably mounted at the first end of the connecting shaft 112 through the mounting block 111, and the second end of the connecting shaft 112 is adjustably mounted at the end of the corresponding conveying roller 10 through the mounting seat 113. The ironing plate 12 is mounted and configured on the conveying roller 10 through the cooperation of the mounting block 111, the connecting shaft 112, and the mounting seat 113 to facilitate the adjustment of the position of the ironing plate 12. The adjusted position can be the position of the ironing plate 12 relative to the surface of the conveying roller 10 in the radial direction of the conveying roller 10, and the position of the ironing plate 12 relative to one side edge of the conveying roller 10 in the axial direction of the conveying roller 10. Such adjustment ensures that the ironing plate 12 can be configured at a position aligned with the tab, and thus has a better ironing effect.

[0044] As an example of the ironing plate 12 being adjustably mounted through the mounting block 111, a waist-shaped hole 121 is formed at the first end of the ironing plate 12. The waist-shaped hole 121 extends along the radial direction of the conveying roller 10. The ironing plate 12 is mounted on the mounting block 111 through the waist-shaped hole 121 and a screw (or other similar object that can be detachably inserted into the mounting block 111 to fix the ironing plate 12). The waist-shaped hole 121 has a certain length in the radial direction of the conveying roller 10. Different positions where the screw is inserted into the waist-shaped hole 121 can result in different distances between the ironing plate 12 and the conveying roller 10, thereby adjusting the ironing degree of the tab.

[0045] And as an example of the second end of the connecting shaft 112 being adjustably mounted through the mounting seat 113, the mounting seat 113 includes a fixed portion 1131 and a movable portion 1132. The fixed portion 1131 extends along the radial direction of the conveying roller 10, and a plurality of mounting positions 11311 are distributed at intervals along the radial direction of the conveying roller 10 on the fixed portion 1131. The movable portion 1132 is detachably connected to one of the mounting positions 11311. Therefore, selecting different mounting positions 11311 to connect the fixed portion 1131 and the movable portion 1132 makes the mounting seat 113 have different lengths in the radial direction. Since the second end of the connecting shaft 112 is mounted on the movable portion 1132, the distance between the ironing plate 12 and the conveying roller 10 is also adjusted by the selection of the mounting position 11311, and the ironing degree of the tab is thus adjusted.

[0046] In some embodiments, the ironing plate 12 is an insulating plate, and the insulating plate helps to avoid damage and other effects on the metal tab.

[0047] There are also some embodiments. The transfer roller 10 includes a rotating shaft 101 and a roller 102. The roller 102 is detachably installed on the rotating shaft 101 to facilitate the replacement and maintenance of the transfer roller 10 during long-term operation, so as to ensure that the surface of the transfer roller 10 meets the requirements for the transfer operation of the electrode tab 3. Additionally, during specific implementation, the body of the roller 102 is made of insulating material, or the surface of the roller 102 in contact with the conveyed electrode tab 3 is coated with an insulating layer to avoid damage to the electrode tab 3 and the ear.

[0048] An embodiment of the present application also provides an electrode tab conveying device. Refer to Figure 2 as shown, and in combination with Figure 1 、 Figure 3 and Figure 4 as shown.

[0049] The electrode tab conveying device includes a mounting frame 22 and a plurality of roller mechanisms 1. Both ends of each roller mechanism 1 are drivingly connected to the mounting frame 22. The mounting frame 22 provides stable support for the plurality of roller mechanisms 1, and the transfer rollers 10 of the plurality of roller mechanisms 1 are arranged in parallel on the mounting frame 22. The parallel arrangement facilitates the input and output of the electrode tab 3 in a unified direction. The electrode tab conveying device realizes the flattening of the ear while stably conveying the electrode tab 3, and avoids affecting the alignment between the flattening plate 12 and the ear due to unstable support.

[0050] Exemplarily, the above-mentioned mounting frame 2 includes a connecting plate 22 and two mounting plates 21. The mounting plates 21 have vertical planes parallel to the vertical direction. These vertical planes facilitate the installation of the roller mechanism 1. The two mounting plates 21 are arranged at intervals and fixedly connected through the ends of the connecting plate 22 so that the vertical planes of the mounting plates 21 face each other, and the two mounting plates 21 are located on opposite sides of the roller mechanism 1 to jointly support the roller mechanism 1 (especially the two ends of the transfer roller 10), thereby improving the stability of the support for the roller mechanism 1.

[0051] Refer to Figure 2 as shown. In some embodiments, adjacent roller mechanisms 1 are arranged in a staggered manner in the vertical direction. Specifically, the adjacent roller mechanisms 1 have different heights in the vertical direction and are arranged at intervals in the horizontal direction, and the transfer rollers 10 at adjacent positions are provided with a predetermined interval distance in the horizontal direction. Therefore, it is possible to avoid the electrode tab 3 being conveyed straight up or straight down, and further avoid the ear of the electrode tab 3 being folded due to straight up and down conveyance.

[0052] Refer to Figure 4 and in combination with Figure 1 、 Figure 2As shown, in some embodiments, a lifting bracket 4 is provided on the mounting bracket 2, and a roller mechanism 1 is mounted on the lifting bracket 4. The lifting bracket 4 drives the roller mechanism 1 to move in the vertical direction. Specifically, the lifting bracket 4 includes a support base 41, a moving base 42, and a lifting motor 43. Among them, the support base 41 is mounted on the mounting bracket 2. For example, the two side ends of the support base 41 are fixedly mounted on a mounting plate 21, and the two mounting plates 21 are connected by a connecting plate 22. The two mounting plates 21 jointly support the support base 41 to make the lifting bracket 4 more stable. The moving base 42 is disposed on the support base 41, and the moving base 42 can move in the vertical direction on the support base 41. The fixed end of the lifting motor 43 is mounted on the support base 41, and the driving end of the lifting motor 43 is connected to the moving base 42 and drives the moving base 42 to lift in the vertical direction. Correspondingly, the roller mechanism 1 is mounted on the moving base 42. The pole piece 3 always passes through and contacts the corresponding roller mechanism 1 and then is transmitted to the output end. The lifting of the roller mechanism 1 in the vertical direction can adjust the length of the pole piece 3 in the transmission interval (defined by multiple roller mechanisms 1). Specifically, driving the moving base 42 to lift in the vertical direction on the support base 41 drives the lifting of the roller mechanism 1, and thus the length of the pole piece 3 passing through the transmission roller 10 can be adjusted to achieve the buffering of the pole piece 3.

[0053] Referring to Figure 2 As shown, in some embodiments, for a transmission roller 10 at the output end of the pole piece conveying device, in specific implementation, a driving mechanism 5 is configured for the transmission roller 10, that is, the transmission roller 10 is connected to the driving mechanism 5 and rotates under the action of the driving mechanism 5. The method of additionally configuring the driving mechanism 5 can provide transmission power in the transmission direction of the pole piece 3 to prevent the pole piece 3 from slipping due to too long a transmission interval.

[0054] In the above description of the present application, unless otherwise clearly specified and limited, terms such as "fixed", "mounted", "connected" or "coupled" should be understood in a broad sense. For example, for the term "connected", it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components or the interaction relationship between two components. Therefore, unless otherwise clearly limited in the present application, those skilled in the art can understand the specific meaning of the above terms in the present application according to specific circumstances.

[0055] Based on the above description of the present application, those skilled in the art can also understand the terms used as follows, such as "upper", "lower", "front", "rear", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise", etc. The terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of the present application. It is only for the purpose of facilitating the description of the solution of the present application and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in the specific orientation. Therefore, the above terms of orientation or positional relationship cannot be understood or interpreted as a limitation to the solution of the present application.

[0056] In addition, the terms "first" or "second" etc. used in the present application to refer to numbers or ordinals are only for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three or more, etc., unless otherwise specifically defined.

[0057] Although several embodiments of the present application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art can think of many changes, alterations and alternative ways without departing from the spirit and scope of the present application. It should be understood that various alternative solutions to the embodiments of the present application described herein may be adopted in the practice of the present application. The appended claims are intended to define the scope of protection of the present application and thus cover equivalents or alternatives within the scope of these claims.

Claims

1. A roller mechanism, characterized in that: The present invention comprises a transmission roller, a mounting bracket and a smoothing plate, wherein the transmission roller is used to guide the pole piece in transmission, the first end of the mounting bracket is transmission-connected to one end of the transmission roller, the first end of the smoothing plate is mounted on the second end of the mounting bracket, the smoothing plate corresponds to the position of the pole ear on the pole piece transported on the transmission roller, the second end of the smoothing plate extends toward the side where the pole piece is input, the middle part of the smoothing plate is protruded toward the transmission roller to form a smoothing channel between the transmission roller, the pole piece passes through between the second end of the smoothing plate and the transmission roller and enters the smoothing channel, and the middle part of the smoothing plate cooperates with the transmission roller to smooth the pole ear in the smoothing channel.

2. The roller mechanism according to claim 1, characterized in that: The mounting bracket includes a mounting block, a connecting shaft and a mounting seat. The smoothing plate is adjustably mounted on the first end of the connecting shaft through the mounting block, and the second end of the connecting shaft is adjustably mounted on the corresponding end of the transmission roller through the mounting seat.

3. The roller mechanism according to claim 2, characterized in that: A waist hole extending along the radial direction of the transmission roller is formed at the first end of the smoothing plate, and the smoothing plate is adjustably mounted on the mounting block through the waist hole.

4. The roller mechanism according to claim 2, characterized in that: The mounting seat includes a fixed portion and a movable portion, the fixed portion extends along the radial direction of the transmission roller, and the fixed portion has a plurality of mounting positions spaced apart along the radial direction of the transmission roller, the movable portion is detachably connected to one of the mounting positions, and the second end of the connecting shaft is mounted on the movable portion.

5. The roller mechanism according to claim 1, characterized in that: The smoothing plate is an insulating plate.

6. The roller mechanism according to claim 1, characterized in that: The transmission roller comprises a rotating shaft and a roller, wherein the roller is detachably mounted on the rotating shaft, and the body of the roller is made of insulating material, or the surface of the roller in contact with the pole piece being transported is coated with an insulating layer.

7. A pole piece conveying device, characterized in that: The pole piece conveying device comprises a mounting frame, and a plurality of roller mechanisms as described in any one of claims 1 to 6, both ends of each roller mechanism are transmission-connected to the mounting frame, and the transmission rollers of the plurality of roller mechanisms are arranged in parallel.

8. The electrode conveying device according to claim 7, characterized in that: Adjacent roller mechanisms are arranged in a staggered manner in the vertical direction.

9. The electrode conveying device according to claim 7, characterized in that: A roller mechanism is movably arranged on the mounting frame along the vertical direction.

10. The electrode conveying device according to claim 7, characterized in that: One of the transmission rollers located at the output end of the pole piece conveying device is connected to a driving mechanism and rotated by the driving mechanism.

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