Tab flattening mechanism and battery production line

Abstract

The utility model discloses a tab flattening mechanism and a battery production line, and relates to the technical field of battery production equipment, the tab flattening mechanism comprises a passing roller, a flattening plate and a flattening firing pin; the passing roller is configured to convey a pole piece and a pole lug on the pole piece; the flattening plate is arranged on one side of the passing roller, a material passing gap is formed between the flattening plate and the passing roller, the material passing gap is configured to allow the tabs to penetrate through, and the flattening plate is configured to flatten the folded tabs; the flattening striker is arranged on the flattening plate, at least part of the flattening striker is located on the side, close to the passing roller, of the flattening plate, and the flattening striker is configured to flatten the folded tab; wherein the tabs flattened by the flattening firing pin enter the material passing gap to be flattened for the second time. According to the electrode tab flattening device, the folded electrode tab can be flattened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production equipment, in particular to an electrode lug flattening mechanism and a battery production line. BACKGROUND

[0002] A lithium battery cell is usually composed of positive and negative electrode sheets, a separator and an electrolyte. The semi-finished product of the positive and negative electrode sheets in the battery production process is usually in a roll state. The electrode sheet roll has uniformly spaced electrode lugs. The thickness of the electrode lug is relatively thin. When the electrode lug changes the movement direction while passing through the roller, or when the electrode sheet is wound, the electrode lug is prone to folding. The folded electrode lug needs to be flattened.

[0003] In the related art, when the over-folded electrode lug passes through the roller and the simple flattening plate without special structure, the flattening plate not only cannot perform the flattening function in the positive direction, but also exacerbates the folding situation, further deteriorating the folding problem, so that the over-folded electrode lug cannot be flattened. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides an electrode lug flattening mechanism and a battery production line, which aims to flatten the over-folded electrode lug.

[0005] The present application provides an electrode lug flattening mechanism, which comprises a roller, a flattening plate and a flattening punch. The roller is configured to transport the electrode sheet and the electrode lug on the electrode sheet. The flattening plate is arranged on one side of the roller and forms a material passing gap between the roller. The material passing gap is configured to pass the electrode lug. The flattening plate is configured to flatten the folded electrode lug. The flattening punch is arranged on the flattening plate and at least partially located on the side of the flattening plate close to the roller. The flattening punch is configured to flatten the over-folded electrode lug. The electrode lug flattened by the flattening punch enters the material passing gap for secondary flattening.

[0006] In the technical scheme of the present application, the flattening punch is added to the flattening plate, so that the flattening punch is at least partially located on the side of the flattening plate close to the roller. Under the rotation of the roller, the electrode sheet and the electrode lug on the electrode sheet are moved. When the folded electrode lug passes through the flattening punch, the flattening punch can flatten the folded electrode lug. When the electrode lug is over-folded, the flattening punch is at least partially located on the side of the flattening plate close to the roller, so that the flattening punch can be closer to the position of the roller, thereby flattening the over-folded electrode lug. Then the electrode lug enters the material passing gap between the flattening plate and the roller, so that the flattening plate can flatten the folded electrode lug again, thereby improving the flattening effect of the electrode lug.

[0007] In some embodiments, the smoothing plate has a first surface close to the passing roller and a second surface away from the passing roller, the smoothing plate is provided with a through hole penetrating from the first surface to the second surface; the smoothing pin is arranged in the through hole, one end of the smoothing pin is located on the first surface, and the other end of the smoothing pin is located on the second surface. Such a design can directly or indirectly install the smoothing pin on the smoothing plate through the end of the smoothing pin located on the first surface of the smoothing plate, thereby facilitating the installation of the smoothing pin, and avoiding the blocking of the pin by the smoothing pin to the passing gap between the smoothing plate and the passing roller. In addition, it is also more convenient to connect the end of the smoothing pin located on the first surface of the smoothing plate with other structures, such as cooperating with the damper on the first surface of the smoothing plate.

[0008] In some embodiments, the smoothing pin can rotate relative to the smoothing plate with the through hole as the rotation axis. Such a design, since the folding angle of the pin is different for different situations, for example, the over-folding angle of the pin can be between 90°-170°, and for different over-folding angles of the pin, the smoothing pin needs to contact different positions of the over-folding pin to perform smoothing treatment; and for different product pin widths and lengths, the smoothing pin also needs to contact different positions of the over-folding pin to perform smoothing treatment. Therefore, by enabling the smoothing pin to rotate relative to the smoothing plate with the through hole as the rotation axis, the contact point of the smoothing pin to the pin can be adjusted, so that the smoothing pin can perform smoothing treatment on pins with different over-folding angles, and also on over-folding pins with different product pin widths and lengths, thereby improving the application range.

[0009] In some embodiments, the pin smoothing mechanism further comprises a damper arranged on the second surface, one end of the smoothing pin is in transmission connection with the moving part of the damper, and the smoothing pin drives the moving part of the damper to stretch and contract when subjected to external force. Such a design, when the smoothing pin contacts the folded pin, the folded pin will also generate a reverse force on the smoothing pin during the smoothing process of the folded pin, thereby causing the smoothing pin to be subjected to external force and driving the moving part of the damper to stretch and contract, so that the smoothing pin and the damper are linked. On the one hand, the damper can be used to dampen the smoothing pin when subjected to external force, and on the other hand, the folding condition of the pin can be determined according to the retraction of the moving part of the damper.

[0010] In some embodiments, one side of the damper is provided with a scale line. Such a design, when the smoothing pin is subjected to a smoothing reverse external force and drives the moving part of the damper to stretch and contract, the retraction degree of the moving part of the damper can be directly measured by the scale line on the damper, without the need for manual measurement, thereby improving the degree of automation.

[0011] In some embodiments, one side of the damper is provided with a signal receiver, the signal receiver is in communication connection with the damper, the signal receiver is configured to receive the retraction signal transmitted by the damper, and is configured to transmit the retraction signal to the marker. With such a design, when the flattening plunger is subjected to a flattening reaction external force and drives the movement part of the damper to stretch and retract, the scale line on the damper will measure the retraction degree of the movement part of the damper, and convert the retraction degree into a retraction signal to be transmitted to the signal receiver, so as to transmit the retraction signal to the marker through the signal receiver. The signal receiver can process the retraction signal of the damper and define it on the scale line to display the retraction condition through the scale line, and classify according to different retraction conditions, so that the signal receiver can receive and transmit according to the retraction condition.

[0012] In some embodiments, the flattening plunger is an elastic plunger. With such a design, the risk of scratching the tab during the process of flattening the tab can be reduced.

[0013] In some embodiments, the flattening plunger is provided with a protective sleeve. With such a design, the protective sleeve can protect the flattening plunger and reduce the risk of breaking during continuous flattening, thereby prolonging the service life of the flattening plunger.

[0014] In some embodiments, the flattening plate is configured to rotate relative to the roller to adjust the size of the material passing gap. With such a design, since tabs of different thicknesses require different sizes of material passing gaps, the present embodiment can adjust the angle of rotation of the flattening plate relative to the roller according to the thickness requirement of the tab, that is, adjust the size of the material passing gap between the flattening plate and the roller, so as to be able to flatten tabs of different thicknesses, thereby improving the scope of application.

[0015] In some embodiments, the tab flattening mechanism further comprises a support frame, one side of the flattening plate is provided with a rotating shaft, and the rotating shaft and the roller are both rotatably connected to the support frame. With such a design, by rotatably connecting the rotating shaft of the flattening plate and the roller to the support frame, the installation reliability of the flattening plate and the roller can be improved, thereby improving the integrity of the tab flattening mechanism.

[0016] In some embodiments, the flattening plate comprises a horizontal flattening section and an arc-shaped guiding section; the horizontal flattening section and the roller form a material passing gap therebetween; the arc-shaped guiding section is connected to the material inlet end of the horizontal flattening section, and is configured to guide the tab into the material passing gap; and the flattening plunger is at least partially located on one side of the arc-shaped guiding section close to the roller. With such a design, under the rotation of the roller, the tab and the tab thereon are driven to move, and when the folded tab passes the flattening plunger, the flattening plunger can flatten the folded tab; then the arc-shaped guiding section guides the tab into the material passing gap between the horizontal flattening section and the roller, so as to flatten the folded tab again through the horizontal flattening section.

[0017] The application also provides a battery production line comprising the tab flattening mechanism.

[0018] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, and can be implemented according to the content of the specification, and in order to make other purposes, features and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative labor.

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the tab flattening mechanism of the application;

[0021] Figure 2 It is a partial structural schematic diagram of an embodiment of the tab flattening mechanism of the application;

[0022] Figure 3 It is a partial structural side view of an embodiment of the tab flattening mechanism of the application;

[0023] Figure 4 It is a structural schematic diagram of the flattening punch in rotation in an embodiment of the tab flattening mechanism of the application;

[0024] Figure 5 It is a structural schematic diagram of the flattening punch in rotation adjustment for different folding angles of the tab in an embodiment of the tab flattening mechanism of the application.

[0025] Explanation of reference signs:

[0026]

[0027] The implementation of the application, functional features and advantages will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0028] The embodiments of the technical scheme of the application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the application, and therefore only serve as examples, and cannot limit the protection scope of the application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," "having" and "with" in the specification and claims, along with their derivatives, are meant to be interpreted as specifying inclusion of the referenced elements, but not exclusion of any other elements.

[0030] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0031] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0033] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application, which do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation.

[0034] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing", and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0035] The lithium battery cell is usually composed of positive and negative electrode sheets, a separator and an electrolyte. The semi-finished product of the positive and negative electrode sheets in the battery production process is usually in the form of a roll. The electrode sheet roll has uniformly spaced electrode tabs. The thickness of the electrode tab is relatively thin. The electrode tab is prone to folding when the movement direction of the electrode tab changes as the electrode sheet passes through the roller or when the electrode sheet is wound. The folded electrode tab needs to be flattened.

[0036] In the related art, when the over-folded electrode tab passes through the roller and the simple flattening plate without special structure, the flattening plate cannot perform the flattening function in the positive direction, but can exacerbate the folding situation, further worsening the folding problem, so that the over-folded electrode tab cannot be flattened.

[0037] Based on the above problems, the present application provides an electrode tab flattening mechanism 100, which aims to flatten the over-folded electrode tab. The specific embodiments and drawings will be described in detail below.

[0038] Please refer to Figures 1 to 3 In an embodiment of the present application, the electrode tab flattening mechanism 100 includes a roller 10, a flattening plate 20 and a flattening punch 30. The roller 10 is configured to transport the electrode sheet and the electrode tab on the electrode sheet. The flattening plate 20 is arranged on one side of the roller 10 and forms a material passing gap 21 between the roller 10. The material passing gap 21 is configured to pass the electrode tab. The flattening plate 20 is configured to flatten the folded electrode tab. The flattening punch 30 is arranged on the flattening plate 20. The flattening punch 30 is at least partially located on the side of the flattening plate 20 close to the roller 10 and is configured to flatten the over-folded electrode tab. The electrode tab flattened by the flattening punch 30 enters the material passing gap 21 for secondary flattening.

[0039] In this embodiment, the roller 10 is also called a transmission roller, which is used to drive the wound electrode sheet and the electrode tab on the electrode sheet to move to the next process for processing or assembly.

[0040] The flattening plate 20 is used to flatten the folded electrode tab passing through the material passing gap 21. The flattening plate 20 can be arranged above the roller 10, or arranged on the side or below the roller 10, as long as the material passing gap 21 can be formed between the flattening plate 20 and the roller 10, and the flattening punch 30 is at least partially located on the side of the flattening plate 20 close to the roller 10. The flattening plate 20 can be a metal plate or an insulating plate. Optionally, in order to avoid the conductive particles on the flattening plate 20 from falling onto the electrode tab and affecting the use performance of the assembled battery, the flattening plate 20 can be an insulating plate such as a plastic plate, a glass plate, a silica gel plate or a rubber plate. Furthermore, the flattening plate 20 can be a rigid plate or an elastic plate. Optionally, in order to reduce the scratch of the electrode tab by the flattening plate 20, the flattening plate 20 can be an elastic plate such as a silica gel plate or a rubber plate.

[0041] The flattening bump pin 30 is used for flattening the folded tab, and the flattening bump pin 30 can be arranged on the side of the flattening plate 20 close to the passing roller 10, or can be partially arranged on the side of the flattening plate 20 close to the passing roller 10. The flattening bump pin 30 can be used for flattening the tab with any folding angle, or can be used for flattening only the over-folded tab, and the tab with a non-serious folding angle is flattened by the flattening plate 20. The over-folded tab can be a tab with a folding angle greater than 90°, and the tab with a non-serious folding angle can be a tab with a folding angle less than 90°. The flattening bump pin 30 can be a rigid bump pin or an elastic bump pin. Optionally, in order to reduce the scratch on the tab, the flattening bump pin 30 can be an elastic bump pin.

[0042] In summary, in the technical scheme of the embodiment of the present application, the flattening bump pin 30 is arranged on the flattening plate 20, so that the flattening bump pin 30 is at least partially located on the side of the flattening plate 20 close to the passing roller 10. Under the rotation of the passing roller 10, the tab and the tab on the tab are moved. When the folded tab passes through the flattening bump pin 30, the flattening bump pin 30 can flatten the folded tab. When the tab is over-folded, the flattening bump pin 30 is at least partially located on the side of the flattening plate 20 close to the passing roller 10, so that the flattening bump pin 30 can be closer to the position of the passing roller 10, thereby flattening the over-folded tab. Then, the tab enters the passing gap 21 between the flattening plate 20 and the passing roller 10, so that the tab is flattened again by the flattening plate 20, thereby improving the flattening effect of the tab.

[0043] Please refer to Figures 1 to 3 In an embodiment of the present application, the flattening plate 20 has a first surface 22 close to the passing roller 10 and a second surface 23 away from the passing roller 10. The flattening plate 20 is provided with a through hole 24 penetrating from the first surface 22 to the second surface 23. The flattening bump pin 30 is arranged in the through hole 24, so that one end of the flattening bump pin 30 is located on the first surface 22, and the other end of the flattening bump pin 30 is located on the second surface 23.

[0044] The flattening plate 20 is located on one side of the passing roller 10 and is arranged in a gap with the passing roller 10. The first surface 22 is the surface of the flattening plate 20 close to the passing roller 10, and the second surface 23 is the surface of the flattening plate 20 away from the passing roller 10.

[0045] Such design can be directly or indirectly mounted on the flattening plate 20 by flattening the plunger 30 at one end of the first surface 22 of the flattening plate 20, so as to facilitate the installation of the flattening plunger 30, and avoid the flattening plunger 30 blocking the entry of the tab into the material passing gap 21 between the flattening plate 20 and the roller 10. In addition, it is also more convenient to connect the flattening plunger 30 at one end of the first surface 22 of the flattening plate 20 with other structures, such as cooperating with the damper 40 and other structures on the first surface 22 of the flattening plate 20.

[0046] Please refer to Figures 4 to 5 In an embodiment of the present application, the flattening plunger 30 can rotate relative to the flattening plate 20 with the perforation 24 as the rotation axis 25.

[0047] Such design, due to the different folding angles of the tabs for different situations, for example, the over-folding angle of the tab can be between 90°~170°, and for different over-folding angles of the tab, the flattening plunger 30 needs to contact different positions of the over-folding tab to perform flattening treatment; and for different product tab width and length, the flattening plunger 30 also needs to contact different positions of the over-folding tab to perform flattening treatment. Therefore, by enabling the flattening plunger 30 to rotate relative to the flattening plate 20 with the perforation 24 as the rotation axis 25, the contact point of the flattening plunger 30 to the tab can be adjusted, so that the flattening plunger 30 can perform flattening treatment on tabs with different over-folding angles, and also can perform flattening treatment on over-folding tabs with different product tab width and length, which can improve the application range.

[0048] Please refer to Figures 1 to 4 In an embodiment of the present application, the tab flattening mechanism 100 further comprises a damper 40, the damper 40 is arranged on the second surface 23, one end of the flattening plunger 30 is in transmission connection with the moving part 42 of the damper 40, and the flattening plunger 30 drives the moving part 42 of the damper 40 to stretch and contract when subjected to external force.

[0049] In this embodiment, the size of the damper 40 can be adjusted from 0.1 Newton to hundreds of Newtons, mainly for adjusting different thicknesses and different materials of the substrate to achieve appropriate flattening force and achieve the effect of flattening without damaging the tab.

[0050] When the flattening plunger 30 contacts the folded tab, the folded tab exerts a reverse force on the flattening plunger 30 during the flattening process, so that the flattening plunger 30 is subjected to an external force and drives the movement part 42 of the damper 40 to extend or retract, so that the flattening plunger 30 and the damper 40 are linked. On the one hand, the flattening plunger 30 can be damped when subjected to an external force by the damper 40. On the other hand, the folding condition of the tab can be determined according to the retraction of the movement part 42 of the damper 40.

[0051] Referring to Figure 3 In an embodiment of the present application, one side of the damper 40 is provided with a scale line 41.

[0052] With such a design, when the flattening plunger 30 is subjected to a flattening reverse external force and drives the movement part 42 of the damper 40 to extend or retract, the retraction degree of the movement part 42 of the damper 40 can be directly measured by the scale line 41 on the damper 40 without manual measurement, thereby improving the degree of automation.

[0053] Referring to Figure 3 In an embodiment of the present application, one side of the damper 40 is provided with a signal receiver 50, which is in communication connection with the damper 40. The signal receiver 50 is configured to receive the retraction signal transmitted by the damper 40 and configured to transmit the retraction signal to a marker 60.

[0054] With such a design, when the flattening plunger 30 is subjected to a flattening reverse external force and drives the movement part 42 of the damper 40 to extend or retract, the scale line 41 on the damper 40 measures the retraction degree of the movement part 42 of the damper 40 and converts the retraction degree into a retraction signal transmitted to the signal receiver 50, so that the signal receiver 50 transmits the retraction signal to the marker 60. The signal receiver 50 can process the retraction signal of the damper 40 and define it on the scale line 41 to display the retraction condition through the scale line 41 and classify according to different retraction conditions, so that the signal receiver 50 can receive and transmit according to the retraction condition.

[0055] For example, in the face of an extremely folded tab (for example, a folding angle greater than 170°), the smoothing punch 30 can drive the movement part 42 of the damper 40 to be fully or mostly retracted (for example, more than 80%) during the smoothing process of the tab, at this time, the scale line 41 on the damper 40 displays a value less than the defined preset scale value, then the signal receiver 50 starts to receive the smoothing information this time, and transmits the recorded information to the marker to calculate the position of the tab to reach the marking process; On the contrary, in the face of an over-folded tab (for example, a folding angle between 90° and 170°), the smoothing punch 30 can drive the movement part 42 of the damper 40 to be moderately retracted (for example, 30% to 80%) during the smoothing process of the tab, at this time, the scale line 41 on the damper 40 displays a value greater than the defined preset scale value, then the signal receiver 50 will not process the smoothing information this time, and will not send information to the subsequent marker 60. Therefore, the embodiment not only can perform smoothing processing on the over-folded tab, but also can distinguish which over-folded tab needs subsequent manual processing, thereby realizing the identification and marking functions of distinguishing over-folded tabs without human intervention.

[0056] Optionally, in order to reduce the scratching of the tab by the smoothing punch 30 during the smoothing process of the tab, in an embodiment of the present application, the smoothing punch 30 can be an elastic punch.

[0057] Please refer to Figure 3 In an embodiment of the present application, the smoothing punch 30 is provided with a protective sleeve 31.

[0058] In the embodiment, the protective sleeve 31 is sleeved on the outside of the smoothing punch 30, and the smoothing end of the smoothing punch 30 protrudes out of the protective sleeve 31, so that the smoothing punch 30 can contact the folded tab through the smoothing end to perform the smoothing process. The protective sleeve 31 can be a rigid member or an elastic member. Optionally, in order to reduce the scratching of the tab, the protective sleeve 31 can be an elastic member such as a silica gel member or a rubber member.

[0059] Such design can protect the smoothing punch 30 by the protective sleeve 31, reduce the risk of breakage of the smoothing punch 30 during continuous smoothing operation, and prolong the service life of the smoothing punch 30.

[0060] Please refer to Figures 1 to 4 In an embodiment of the present application, the smoothing plate 20 is configured to rotate relative to the over-roller 10 to adjust the size of the over-material gap 21.

[0061] Such a design, since the different thickness of the tab needs to match the different size of the material passing gap 21, therefore, the embodiment can adjust the angle of the flattening plate 20 relative to the rotation of the passing roller 10, that is, adjust the size of the material passing gap 21 between the flattening plate 20 and the passing roller 10, so as to be able to flatten the tab of different thickness, so as to improve the application range.

[0062] Please refer to Figures 1 to 4 In an embodiment of the present application, the tab flattening mechanism 100 further comprises a support frame, one side of the flattening plate 20 is provided with a rotating shaft 25, and the rotating shaft 25 and the passing roller 10 are both rotationally connected to the support frame.

[0063] The support frame is the overall support frame of the tab flattening mechanism 100, which can be a frame body independent of the battery production line, or a part of the overall frame of the battery production line.

[0064] Such a design, by rotationally connecting the rotating shaft 25 of the flattening plate 20 and the passing roller 10 to the support frame, can improve the installation reliability of the flattening plate 20 and the passing roller 10, so as to improve the integrity of the tab flattening mechanism 100.

[0065] Please refer to Figures 1 to 4 In an embodiment of the present application, the flattening plate 20 comprises a horizontal flattening section 26 and an arc-shaped guiding section 27; the horizontal flattening section 26 and the passing roller 10 form a material passing gap 21; the arc-shaped guiding section 27 is connected to the material inlet end of the horizontal flattening section 26, the arc-shaped guiding section 27 is configured to guide the tab into the material passing gap 21, and the flattening punch 30 is at least partially located on one side of the arc-shaped guiding section 27 close to the passing roller 10.

[0066] In the embodiment, the horizontal flattening section 26 is a planar plate structure, and the plane where the horizontal flattening section 26 is located is parallel to the tangent line of the passing roller 10; the arc-shaped guiding section 27 is an arc-shaped plate structure, one side of the arc-shaped guiding section 27 is connected to one side of the horizontal flattening section 26, and the side of the arc-shaped guiding section 27 away from the horizontal flattening section 26 is set to be raised away from the passing roller 10, so as to form a guiding opening between the arc-shaped guiding section 27 and the passing roller 10.

[0067] Such a design, under the rotation of the passing roller 10, drives the movement of the tab and the tab on the tab, when the folded tab passes through the flattening punch 30, the flattening punch 30 can flatten the folded tab; then the arc-shaped guiding section 27 guides the tab into the material passing gap 21 between the horizontal flattening section 26 and the passing roller 10, so as to flatten the folded tab twice by the horizontal flattening section 26.

[0068] According to some embodiments of the present application, the present application provides a tab flattening mechanism 100, comprising a roller 10, a flattening plate 20, a flattening pin 30 and a damper 40; the roller 10 is configured to transport the tab and the tab on the tab; the flattening plate 20 is arranged on one side of the roller 10 and forms a material passing gap 21 with the roller 10, the material passing gap 21 is configured to pass the tab, and the flattening plate 20 is configured to flatten the folded tab; the flattening plate 20 has a first surface 22 close to the roller 10 and a second surface 23 away from the roller 10, and the flattening plate 20 is provided with a through hole 24 penetrating from the first surface 22 to the second surface 23; the flattening pin 30 is arranged in the through hole 24, so that one end of the flattening pin 30 is located on the first surface 22 and the other end of the flattening pin 30 is located on the second surface 23, and the flattening pin 30 is configured to flatten the folded tab. The flattening pin 30 can rotate relative to the flattening plate 20 with the through hole 24 as the rotation axis 25. The damper 40 is arranged on the second surface 23, one end of the flattening pin 30 is in transmission connection with the moving part 42 of the damper 40, and the flattening pin 30 drives the moving part 42 of the damper 40 to stretch and contract when subjected to external force; one side of the damper 40 is provided with a scale line 41; one side of the damper 40 is provided with a signal receiver 50, the signal receiver 50 is in communication connection with the damper 40, the signal receiver 50 is configured to receive the retraction signal transmitted by the damper 40, and is configured to transmit the retraction signal to the marker 60.

[0069] In the technical scheme of the embodiment, the technical scheme of the application adds the flattening punch 30 to the flattening plate 20, so that the flattening punch 30 is at least partially located on the side of the flattening plate 20 close to the passing roller 10. Under the rotation of the passing roller 10, the passing roller 10 drives the pole piece and the pole lug on the pole piece to move. When the folded pole lug passes the flattening punch 30, the flattening punch 30 can flatten the folded pole lug. When the pole lug is excessively folded, the flattening punch 30 is at least partially located on the side of the flattening plate 20 close to the passing roller 10, so that the flattening punch 30 can be closer to the position of the passing roller 10, thereby flattening the excessively folded pole lug. Then, the pole lug enters the passing gap 21 between the flattening plate 20 and the passing roller 10, so that the flattening plate 20 can flatten the folded pole lug again, thereby improving the flattening effect on the pole lug. The flattening punch 30 is directly or indirectly installed on the flattening plate 20 at one end of the first surface 22 of the flattening plate 20, so that the installation of the flattening punch 30 is more convenient, and the flattening punch 30 can avoid blocking the pole lug from entering the passing gap 21 between the flattening plate 20 and the passing roller 10. In addition, the folding angle of the pole lug is different for different situations. For example, the excessively folded angle of the pole lug can be between 90° and 170°. For different excessively folded angles of the pole lug, the flattening punch 30 needs to contact different positions of the excessively folded pole lug to flatten the pole lug. For different widths and lengths of the pole lug of different products, the flattening punch 30 also needs to contact different positions of the excessively folded pole lug to flatten the pole lug. Therefore, the flattening punch 30 can rotate relative to the flattening plate 20 around the perforation 24 as the rotation axis 25, so that the contact point of the flattening punch 30 with the pole lug can be adjusted. Thus, the flattening punch 30 can flatten the pole lug with different excessively folded angles, and can also flatten the excessively folded pole lug with different widths and lengths of the pole lug of different products, thereby improving the application range.

[0070] In addition, when the flattening punch 30 is subjected to the flattening reaction force and drives the movement part 42 of the damper 40 to stretch and contract, the scale line 41 on the damper 40 measures the retraction degree of the movement part 42 of the damper 40, and converts the retraction degree into a retraction signal and transmits the retraction signal to the signal receiver 50. The signal receiver 50 can process the retraction signal of the damper 40, and define the scale line 41 to display the retraction condition, and classify different retraction conditions, so that the signal receiver 50 can receive and transmit the retraction signal according to the retraction condition.

[0071] For example, in the face of an extremely folded tab (for example, a folding angle greater than 170°), the smoothing plunger 30 can drive the movement part 42 of the damper 40 to be fully or mostly retracted (for example, more than 80% retracted) during the smoothing process of the tab. At this time, the scale line 41 on the damper 40 displays a value less than the defined preset scale value, so the signal receiver 50 starts to receive the smoothing information and transmits the recorded information to the marker to calculate the position of the tab to reach the marking process. On the contrary, in the face of an over-folded tab (for example, a folding angle between 90° and 170°), the smoothing plunger 30 can drive the movement part 42 of the damper 40 to be moderately retracted (for example, 30% to 80% retracted) during the smoothing process of the tab. At this time, the scale line 41 on the damper 40 displays a value greater than the defined preset scale value, so the signal receiver 50 will not process the smoothing information and will default to the smoothing effect, and will not send information to the subsequent marker 60. Therefore, the present embodiment not only can smooth the over-folded tab, but also can distinguish which over-folded tab needs subsequent manual processing, realizing the recognition and identification function of distinguishing over-folded tabs without human intervention.

[0072] The present application also proposes a battery production line, which comprises the tab smoothing mechanism 100. The specific structure of the tab smoothing mechanism 100 is referred to the above-mentioned embodiments. Since the battery production line adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0073] The above-mentioned is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the technical concept of the present application and the content of the specification and drawings are included in the patent protection scope of the present application.

Claims

1. A tab smoothing mechanism, characterized in that, include: The roller is configured to convey the electrode sheet and the tabs on the electrode sheet; A smoothing plate is disposed on one side of the roller and forms a material passage gap with the roller. The material passage gap is configured to allow the electrode tab to pass through, and the smoothing plate is configured to smooth out the folded electrode tab. A smoothing striker is disposed on the smoothing plate, at least partially located on the side of the smoothing plate near the feed roller, and configured to smooth the overturned tabs; wherein, the tabs smoothed by the smoothing striker enter the feed gap for secondary smoothing.

2. The tab smoothing mechanism as described in claim 1, characterized in that, The smoothing plate has a first surface close to the roller and a second surface away from the roller, and the smoothing plate is provided with a perforation extending from the first surface to the second surface; The smoothing striker is inserted through the hole such that one end of the smoothing striker is located on the first surface and the other end of the smoothing striker is located on the second surface.

3. The tab smoothing mechanism as described in claim 2, characterized in that, The smoothing striker is capable of rotating relative to the smoothing plate about the perforation as its axis of rotation.

4. The tab smoothing mechanism as described in claim 2, characterized in that, The electrode smoothing mechanism also includes a damper, which is disposed on the second surface. One end of the smoothing striker is connected to the moving part of the damper. When the smoothing striker is subjected to an external force, it drives the moving part of the damper to extend and retract.

5. The tab smoothing mechanism as described in claim 4, characterized in that, The damper has scale lines on one side.

6. The tab smoothing mechanism as described in claim 5, characterized in that, A signal receiver is provided on one side of the damper. The signal receiver is communicatively connected to the damper and is configured to receive the retraction signal transmitted by the damper and to transmit the retraction signal to the marking device.

7. The tab smoothing mechanism as described in any one of claims 1 to 6, characterized in that, The smoothing striker is an elastic striker.

8. The tab smoothing mechanism as described in any one of claims 1 to 6, characterized in that, The smoothing striker is equipped with a protective sleeve.

9. The tab smoothing mechanism as described in any one of claims 1 to 6, characterized in that, The smoothing plate is configured to rotate relative to the feed roller to adjust the size of the feed gap.

10. The tab smoothing mechanism as described in claim 9, characterized in that, The tab smoothing mechanism also includes a support frame, and a rotating shaft is provided on one side of the smoothing plate. The rotating shaft and the roller are both rotatably connected to the support frame.

11. The tab smoothing mechanism as described in any one of claims 1 to 6, characterized in that, The flat surface includes: The horizontal smoothing section forms the material passage gap with the passing roller; An arc-shaped guide section is connected to the feed end of the horizontal smoothing section. The arc-shaped guide section is configured to guide the electrode tab into the material passage gap. The smoothing striker is at least partially located on the side of the arc-shaped guide section near the roller.

12. A battery production line, characterized in that, Includes the tab smoothing mechanism as described in any one of claims 1 to 11.

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