Rolling device for battery pole piece

Abstract

The utility model belongs to the technical field of battery processing, and particularly relates to a rolling device of a battery pole piece, which comprises an inclined block component, and a conveying structure, a coating detection component and a rolling mechanism which are sequentially arranged along the conveying direction, the coating detection part is arranged on the side of the conveying direction; the rolling mechanism comprises a first rolling structure and a second rolling structure which are arranged side by side; a rolling gap is formed between the first rolling structure and the second rolling structure; a pushing inclined surface is arranged on the inclined block component; the inclined block component is movably arranged between the first rolling structure and the second rolling structure; a pushing inclined surface is arranged on the inclined block component; and the pushing inclined surface is propped against the first rolling structure and / or the second rolling structure. According to the utility model, the rolling thickness of the double-layer area and the single-layer area can be effectively controlled; and moreover, the energy value of the battery cell is effectively guaranteed, and the lithium precipitation phenomenon is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery processing, and in particular relates to a rolling device for battery pole pieces. Background Art

[0002] Lithium battery refers to the most basic electrochemical unit containing lithium, including metallic lithium, lithium alloys, lithium ions, and lithium polymers. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain metallic lithium and are rechargeable. The production process of the battery pole is generally: slitting, coating, and rolling.

[0003] However, the rolling thickness of the pole piece in the battery is achieved by adjusting the pressure roller gap to reach the design value; because the pole piece has a long film surface and a short film surface (i.e., a single-sided area and a double-sided area), most of the existing battery pole piece rolling devices only set corresponding design values ​​for the double-sided area, and cannot flexibly adjust the rolling thickness of the double-sided area and the single-sided area, resulting in the single-sided area of ​​some pole pieces having a larger thickness than the double-sided area, thus affecting the energy value of the battery cell and even causing lithium deposition, affecting the stability and safety of use. Utility Model Content

[0004] The purpose of the utility model is to provide a rolling device for battery pole pieces in view of the deficiencies in the prior art, which can solve the technical problem that only corresponding design values ​​are set for the double-sided areas, and the rolling thickness of the double-sided areas and the single-sided areas cannot be flexibly adjusted.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A rolling device for battery pole pieces, comprising an inclined block component and a conveying structure, a coating detection component and a rolling mechanism arranged in sequence along a conveying direction; the coating detection component is arranged on the side of the conveying direction; the rolling mechanism comprises a first rolling structure and a second rolling structure arranged side by side; and a rolling gap is provided between the first rolling structure and the second rolling structure; the inclined block component is movably arranged between the first rolling structure and the second rolling structure; and a pushing inclined surface is provided on the inclined block component; the pushing inclined surface abuts against the first rolling structure and / or the second rolling structure.

[0007] Preferably: the coating detection component is a fiber laser; and / or the number of the coating detection components is at least two; all the coating detection components are relatively arranged at the upper and lower sides of the conveying direction.

[0008] Preferably: the first rolling structure comprises an upper rolling roller and a fixed bearing seat; the upper rolling roller is arranged on the fixed bearing seat; and the inclined block component is arranged between the fixed bearing seat and the second rolling structure.

[0009] Preferably: the second rolling structure comprises a lower roller and a movable bearing seat; the lower roller is arranged on the movable bearing seat; and the inclined block component is arranged between the first rolling structure and the movable bearing seat.

[0010] Preferably, an angle α of the push inclined surface in a direction from the first rolling structure toward the second rolling structure satisfies: 13°≤α≤16°.

[0011] Preferably, the pushing slope is arranged to be inclined downward from the conveying direction toward the second rolling structure.

[0012] Preferably: the inclined block component comprises a moving driving component and an inclined block body connected to the moving driving component; the pushing inclined surface is arranged on a side of the inclined block body close to the second rolling structure.

[0013] Preferably: a first limiting inclined surface is also provided on the side of the inclined block body other than the pushing inclined surface; the inclined block component also includes a limiting block; the limiting block is connected to the first rolling structure; and a second limiting inclined surface corresponding to the first limiting inclined surface is provided on the limiting block.

[0014] Preferably: the limiting block comprises a first mounting block, an elastic limiting member and a second mounting block which are sequentially connected from top to bottom; and the first mounting block is connected to the first rolling structure; and the second limiting slope is arranged at the bottom of the second mounting block.

[0015] Preferably: the conveying structure comprises a first conveying roller and a second conveying roller; the first conveying roller and the second conveying roller are arranged side by side.

[0016] The beneficial effect of the utility model lies in that the technical scheme uses the coating detection components on both side ends to detect and determine the long film surface and the short film surface of the pole piece body before the pole piece body is transported to the rolling mechanism through the conveying structure, thereby determining the double-layer area and the single-layer area of ​​the pole piece body during rolling according to the long film surface and the short film surface, and then adjusting the rolling distance between the first rolling structure and the second rolling structure through the movement properties of the inclined block component, so that the rolling thickness of the double-layer area and the single-layer area can be effectively controlled, thereby effectively ensuring the energy value of the battery cell and avoiding the occurrence of lithium plating; and improving the structure of the pole piece body and the stability and safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following will refer to the attached Figures 1 to 4 To describe the features, advantages and technical effects of exemplary embodiments of the present utility model.

[0018] Figure 1It is a front view of a rolling device for a battery pole piece according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of a rolling device for a battery pole piece according to an embodiment of the utility model;

[0020] Figure 3 It is a partial enlarged view of a rolling device for a battery pole piece according to an embodiment of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the inclined block component of the rolling device for battery pole pieces according to one embodiment of the utility model.

[0022] In the figure: 1-conveying structure; 11-first conveying roller; 12-second conveying roller; 13-second frame; 2-coating detection component; 3-rolling mechanism; 301-rolling gap; 31-second rolling structure; 311-lower roller; 312-movable bearing seat; 313-lifting cylinder; 32-first rolling structure; 321-upper roller; 322-fixed bearing seat; 33-first frame; 4-inclined block component; 41-moving drive component; 42-inclined block body; 421-pushing inclined plane; 422-first limiting inclined plane; 43-limiting block; 431-second limiting inclined plane; 432-first mounting block; 433-elastic limiting member; 434-second mounting block; 44-slide rail structure; 441-guide rail; 442-slider; 5-pole body; A-conveying direction; α-inclined plane angle; β-first inclination angle. DETAILED DESCRIPTION

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0024] 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 "multiple" is more than two, unless otherwise clearly and specifically defined.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and multiple situations exist alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0027] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0028] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0029] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] The following is combined with Figure 1 to Figure 4 The utility model is further described in detail, but it is not intended to limit the utility model.

[0031] like Figure 1 and 2As shown, in one embodiment of the utility model, the rolling device of the battery electrode; includes an inclined block component 4 and a conveying structure 1, a coating detection component 2 and a rolling mechanism 3 arranged in sequence along the conveying direction A; and the conveying structure 1 is used to convey the electrode body 5 to the rolling mechanism 3; the coating detection component 2 is arranged on the side of the conveying direction A; and the coating detection component 2 is used to detect the coating length (i.e., the length of the active material layer) on the surface of the electrode body 5; the rolling mechanism 3 includes a first rolling structure 32 and a second rolling structure 31 arranged side by side; and a rolling gap 301 is provided between the first rolling structure 32 and the second rolling structure 31; the rolling gap 301 is used to convey the electrode body 5; the inclined block component 4 is movably arranged between the first rolling structure 32 and the second rolling structure 31; and the inclined block component 4 is provided with a pushing inclined surface 421; the pushing inclined surface 421 abuts against the first rolling structure 32 and / or the second rolling structure 31.

[0032] The technical solution of the utility model uses the coating detection components 2 on both side ends to detect and determine the long film surface and the short film surface of the pole piece body 5 before the conveying structure 1 conveys the pole piece body 5 to the rolling mechanism 3, so as to determine the double-layer area and the single-layer area of ​​the pole piece body during rolling according to the long film surface and the short film surface, and then adjust the rolling distance between the first rolling structure and the second rolling structure through the movement properties of the inclined block component, so as to effectively control the rolling thickness of the double-layer area and the single-layer area, thereby effectively ensuring the energy value of the battery cell and avoiding the occurrence of lithium plating; and improving the structure of the pole piece body and the stability and safety of use.

[0033] Specifically, in some embodiments, the number of coating detection components 2 is at least two, and they are fiber lasers; all fiber lasers are relatively arranged at the upper and lower ends of the conveying direction A. That is to say, before rolling, the single-sided area and the double-sided area are identified by the fiber lasers on the upper and lower sides, and the data of identifying the single-sided area and the double-sided area are fed back to the control touch screen end to set the single-sided area and double-sided area roller gaps separately, and then the control touch screen end controls the inclined block component 4 and the rolling mechanism 3 to achieve the purpose of controlling the thickness of the single-sided area and the double-sided area respectively, and can improve the ED (energy) of the battery cell and reduce the risk of lithium plating.

[0034] In some embodiments (not shown), the push slope 421 abuts against the first rolling structure 32, and the second rolling structure 31 is relatively fixed on the first frame 33; the first rolling structure 32 is relatively movably connected to the first frame 33. In other embodiments, Figure 1 and 2 As shown, the pushing inclined surface 421 abuts against the second rolling structure 31 ; and the first rolling structure 32 is relatively fixed on the first frame 33 ; and the second rolling structure 31 is relatively movably connected to the first frame 33 .

[0035] Specifically, in some embodiments, Figure 1 and 2 As shown, the first rolling structure 32 includes an upper roller 321 and a fixed bearing seat 322; the upper roller 321 is movably connected to the inside of the fixed bearing seat 322; the fixed bearing seat 322 is connected to the first frame 33; and the inclined block component 4 is arranged between the fixed bearing seat 322 and the second rolling structure 31. Among them, a first rolling bearing is arranged in the fixed bearing seat 322; the upper roller 321 is connected to the first rolling bearing.

[0036] Specifically, in some embodiments, Figure 1 and 2 As shown, the second rolling structure 31 includes a lower roller 311 and a movable bearing seat 312; the lower roller 311 is movably connected to the inside of the movable bearing seat 312; the movable bearing seat 312 is movably connected to the first frame 33; and the inclined block component 4 is arranged between the first rolling structure 32 (the fixed bearing seat 322) and the movable bearing seat 312. Among them, a second rolling bearing is arranged in the movable bearing seat 312; the lower roller 311 is connected to the second rolling bearing. Further, as Figure 2 As shown, a lifting cylinder 313 is provided at the bottom of the movable bearing seat 312; the mounting end of the lifting cylinder 313 is fixed to the first frame 33. In other words, the rolling stress between the first rolling structure 32 and the second rolling structure 31 can be effectively adjusted by the upward lifting or downward pressure release of the lifting cylinder 313, thereby improving the rolling effect.

[0037] Specifically, in some embodiments, Figure 1 and 2 As shown, the inclined block component 4 includes a moving driving component 41 and an inclined block body 42 connected to the moving driving component 41; a pushing inclined surface 421 is arranged on the side of the inclined block body 42 close to the second rolling structure. The moving driving component 41 is a power source formed by a lateral driving cylinder, or a lateral driving screw and a lateral driving motor. This structure can stably and accurately push the inclined block body 42 to the desired position through the lateral driving cylinder or the lateral driving screw, so as to improve the adjustment efficiency.

[0038] Specifically, in some embodiments, Figure 3 and 4As shown, the pushing slope 421 is inclined downward from the conveying direction A toward the second rolling structure 31 (that is, the slope of the pushing slope 421 is arranged incrementally from the conveying direction A), that is to say, the pushing adjustment type from the outside to the inside can ensure the smoothness of the adjustment and reduce the damage caused by collision with the rolling mechanism 3; the slope angle α on the pushing slope 421 from the first rolling structure toward the second rolling structure satisfies: 13°≤α≤16°; the setting of the inclination angle of 13° to 16° can ensure that the adjusted gap can meet the thickness size of the pole piece body 5, thereby improving the rolling efficiency.

[0039] Specifically, in some embodiments, Figure 2 and 3 As shown, a first limiting inclined surface 422 is also provided on one side of the non-pushing inclined surface 42 of the inclined block body 42; the inclined block component 4 also includes a limiting block 43; the limiting block 43 is connected to the first rolling structure 32 (fixed bearing seat 322); and a second limiting inclined surface 431 corresponding to the first limiting inclined surface 422 is provided on the limiting block 43. Among them, the first inclination angle β on the first limiting inclined surface 422 is equal to the inclination angle of the second limiting inclined surface 431; through the two inclined surfaces with the same inclination, when the inclined block body reaches the limit position, the first limiting inclined surface 422 of the inclined block body 42 can abut against the second limiting inclined surface 431 to achieve maximum movement. Further, the first inclination angle β on the first limiting inclined surface 422 is equal to the inclined surface angle α on the pushing inclined surface 421; and the first limiting inclined surface 422 and the pushing inclined surface 421 are symmetrically arranged at both side ends of the inclined block body.

[0040] Specifically, in some embodiments, Figure 3 and 4 As shown, the limit block 43 includes a first mounting block 432, an elastic limit member 433 and a second mounting block 434 connected in sequence from top to bottom; and the first mounting block 432 is connected to the first rolling structure 32 (the fixed bearing seat 322 on it); the second limit slope 431 is arranged at the bottom of the second mounting block 434.

[0041] Specifically, in some embodiments, Figure 2 and 3 As shown, the inclined block component 4 also includes a slide rail structure 44; the movable end of the slide rail structure 44 is connected to the inclined block body 42; and the mounting end of the slide rail structure 44 is connected to the first frame 33. Figure 3 As shown, the slide rail structure 44 includes a guide rail 441 and a slider 442 that are movably connected to each other; the slider 442 is connected to the inclined block body 42; and the guide rail 441 is connected to the first frame 33. This structure can ensure the guidance and orderliness of the adjustment of the inclined block body 42.

[0042] Specifically, in some embodiments, Figure 1 and2 As shown, the conveying structure 1 includes a first conveying roller 11, a second conveying roller 12 and a second frame 13; the first conveying roller 11 and the second conveying roller 12 are arranged side by side on the second frame 13; and a conveying gap is provided between the first conveying roller 11 and the second conveying roller 12, and the conveying gap is used to convey the electrode body 5. This structure can ensure the conveying stability of the electrode body 5 through the conveying roller type feeding and conveying, which is conducive to ensuring the stability of rolling. Among them, as Figure 1 As shown, the coating detection component 2 is connected to the outer end of the second frame 13. This structure can ensure the installation stability of the coating detection component 2, and can reduce the need for setting up a separate bracket to assemble the coating detection component 2, thereby effectively reducing the investment in the equipment structure. Among them, the first conveying roller 11 or the second conveying roller 12 is driven to rotate by a conveying motor; the first conveying roller 11 is connected to the second conveying roller 12 through a transmission chain.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0044] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the above specific implementation, and any obvious improvement, replacement or modification made by the technicians in this field on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.

Claims

1. A rolling device for a battery pole piece, characterized in that: It includes an inclined block component and a conveying structure, a coating detection component and a rolling mechanism arranged in sequence along the conveying direction; the coating detection component is arranged on the side of the conveying direction; the rolling mechanism includes a first rolling structure and a second rolling structure arranged side by side; and a rolling gap is provided between the first rolling structure and the second rolling structure; the inclined block component is movably arranged between the first rolling structure and the second rolling structure; and a pushing inclined surface is provided on the inclined block component; the pushing inclined surface abuts against the first rolling structure and / or the second rolling structure.

2. The rolling device for battery pole pieces according to claim 1, characterized in that: The coating detection component is a fiber laser; and / or, the number of the coating detection components is at least two; and all the coating detection components are relatively arranged at the upper and lower sides of the conveying direction.

3. The rolling device for battery pole pieces according to claim 1, characterized in that: The first rolling structure comprises an upper rolling roller and a fixed bearing seat; the upper rolling roller is arranged on the fixed bearing seat; and the inclined block component is arranged between the fixed bearing seat and the second rolling structure.

4. The rolling device for battery pole pieces according to claim 1 or 3, characterized in that: The second rolling structure comprises a lower rolling roller and a movable bearing seat; the lower rolling roller is arranged on the movable bearing seat; and the inclined block component is arranged between the first rolling structure and the movable bearing seat.

5. The rolling device for battery pole pieces according to claim 1, characterized in that: An angle α of the push inclined surface from the first rolling structure toward the second rolling structure satisfies: 13°≤α≤16°.

6. The rolling device for battery pole pieces according to claim 5, characterized in that: The pushing slope is arranged to be inclined downward from the conveying direction toward the second rolling structure.

7. The rolling device for battery pole pieces according to claim 1, 5 or 6, characterized in that: The inclined block component includes a moving driving component and an inclined block body connected to the moving driving component; the pushing inclined surface is arranged on a side of the inclined block body close to the second rolling structure.

8. The rolling device for battery pole pieces according to claim 7, characterized in that: A first limiting inclined surface is also provided on the side of the inclined block body other than the pushing inclined surface; the inclined block component also includes a limiting block; the limiting block is connected to the first rolling structure; and a second limiting inclined surface corresponding to the first limiting inclined surface is provided on the limiting block.

9. The rolling device for battery pole pieces according to claim 8, characterized in that: The limiting block comprises a first mounting block, an elastic limiting member and a second mounting block which are sequentially connected from top to bottom; and the first mounting block is connected to the first rolling structure; and the second limiting inclined surface is arranged at the bottom of the second mounting block.

10. The rolling device for battery pole pieces according to claim 1, characterized in that: The conveying structure comprises a first conveying roller and a second conveying roller; the first conveying roller and the second conveying roller are arranged side by side.

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