Ending compression roller structure and battery production device

Abstract

The utility model provides an ending compression roller structure and a battery production device, and solves the problems that an ending compression roller only has the function of pressing the tail part of a diaphragm to prevent the ending from loosening in the diaphragm cutting process, a battery cell tab is easy to fold in the subsequent cutting process, and the reject ratio of a battery cell is increased. The ending compression roller structure comprises a base, a compression roller and a pre-folding part, the compression roller is rotationally connected to the base, the pre-folding part is fixed to the end of the compression roller, the side, facing the compression roller, of the pre-folding part is provided with an inclined face, the inclined face is obliquely arranged relative to the axis direction of the compression roller, and the inclined face is used for pre-folding a tab in the direction facing the end face of a battery cell; the pre-folding part is arranged at the end part of the compression roller, the ending compression roller compresses the tail part of the diaphragm in the diaphragm cutting process to prevent the ending loosening, and the pre-folding part bends the tab at the end part of the battery cell, so that the tab of the battery cell can be prevented from being folded in the subsequent cutting process, the section, with the tab, of the battery cell can be kept not to be cut, and the processing efficiency of the battery is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production equipment technical field especially is related to a tailing pressure roller structure and battery production device. BACKGROUND

[0002] In the battery manufacturing process, the tailing pressure roller prevents the tailing from loosening by pressing the tail of the diaphragm during the cutting process. This ensures that the tail of the diaphragm can be smoothly guided to the tailing wheel and be pressed tightly after cutting, thereby avoiding wrinkles or rolling of the tail of the diaphragm before reaching the tailing wheel. It is an indispensable part of battery manufacturing.

[0003] In the battery production process, the cell (the core part of the battery) needs to be cut off to form a single battery unit. This step is usually completed using a special cutting device to ensure that the cutting surface is smooth and free of burrs, thereby not affecting the performance and safety of the battery. The pre-bending operation of the tab during the cell winding or lamination process. In battery manufacturing, the tab is an important part of connecting the positive and negative electrodes, and its shape and position have a significant impact on the performance of the battery. The purpose of pre-bending is to avoid the tab from being folded outward or raised in subsequent processes, thereby improving the overall quality and production efficiency of the cell.

[0004] In the prior art, the tab is pre-bent once before insertion; and the tab is pre-bent again during winding. In the prior art, the entire cell of the cylindrical battery tab is laser cut during the cylindrical battery cell winding process, which causes the cell tab, especially the large tab (8-10 mm long), to be prone to folding in subsequent processes, increasing the cell defect rate.

[0005] The applicant found that the prior art at least has the following technical problems: Referring to Figure 1 , Figure 1 is a schematic view of the cooperation structure of the tailing pressure roller 1' and the cell 100 in the prior art. In the prior art, the tailing pressure roller 1' only has the function of pressing the tail of the diaphragm to prevent the tail from loosening during the cutting process of the diaphragm. The cell tab is prone to folding in the subsequent cutting process, increasing the cell 100 defect rate. INVENTION CONTENTS

[0006] The utility model discloses a tailing pressure roller structure and battery production device to solve the technical problem that the tailing pressure roller in the prior art only has the function of pressing the tail of the diaphragm to prevent the tail from loosening during the cutting process of the diaphragm, and the cell tab is prone to folding in the subsequent cutting process, increasing the cell defect rate. The preferred technical solutions in many technical solutions provided by the utility model can produce many technical effects, which are described in detail below.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] The tailing pressing roller structure comprises a base, a pressing roller and a pre-folding part.

[0009] The pressing roller is rotationally connected to the base, the pre-folding part is fixed to the end of the pressing roller, one side of the pre-folding part facing the pressing roller has an inclined surface, the inclined surface is arranged to be inclined compared to the axis direction of the pressing roller, and the inclined surface is used to pre-fold the tab along the end surface direction of the battery cell.

[0010] Preferably, the pre-folding part is coaxially arranged with the pressing roller.

[0011] Preferably, the pre-folding part is arranged to protrude from the surface of the pressing roller around the axis of the pressing roller.

[0012] Preferably, the pre-folding part is a circular truncated cone structure, the narrow end of the circular truncated cone structure is fixedly connected with the end of the pressing roller, the wide end of the circular truncated cone structure is fixedly connected with the roller shaft of the pressing roller, and the circumferential surface of the circular truncated cone structure is configured as the inclined surface.

[0013] Preferably, the pre-folding part is fixed to only one end of the pressing roller.

[0014] Preferably, a roller bracket is fixed on the base, and the pressing roller is rotationally connected with the roller bracket through a roller shaft.

[0015] Preferably, the roller bracket is a U-shaped structure, and the roller shaft is rotationally connected with the vertical section of the U-shaped structure.

[0016] Preferably, the pre-folding part and the pressing roller are integrally formed.

[0017] The utility model also provides a battery production device which comprises the tailing pressing roller structure.

[0018] Preferably, the battery is a cylindrical battery, and the section of the battery cell having the tab is a non-cutting section.

[0019] Compared with the prior art, the tailing pressing roller structure and the battery production device have the following beneficial effects: the pre-folding part is arranged at the end of the pressing roller, the battery cell cooperates with the pressing roller, the tailing pressing roller presses the tail of the diaphragm during the cutting process of the diaphragm to prevent the tailing from loosening, the pre-folding part bends the tab at the end of the battery cell, the tab is pre-folded along the end surface direction of the battery cell, the battery cell tab can be prevented from being folded in the subsequent cutting process, the section of the battery cell having the tab can be retained without being cut, and the processing efficiency of the battery is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 is the cooperation structure diagram of the tailing press roller and the battery cell in the prior art;

[0022] Figure 2 is the overall structure diagram of the tailing press roller of the present application;

[0023] Figure 3 is the structure diagram of the press roller of the present application;

[0024] Figure 4 is the cooperation structure diagram of the tailing press roller and the battery cell of the present application;

[0025] Figure 5 is the front view of the cooperation of the tailing press roller and the battery cell.

[0026] In the figure, 100 is a battery cell, 101 is a tab, 1 is a press roller, 2 is a pre-folding part, 21 is an inclined surface, 3 is a roller shaft, 4 is a roller bracket, and 5 is a base. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0028] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0029] In the description of the utility model, still need explaining, unless another explicit provision and limitation, term '' set '', '' install '', '' link '', '' connect '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the intercommunication.For ordinary skilled person in the art, the above-mentioned terms can be understood in the utility model according to specific circumstances.

[0030] Referring to Figure 1 As shown in the figure, Figure 1 It is the cooperation structure diagram of tailing press roller 1' and electric core 100 in prior art;In prior art, tailing press roller 1' only has the function of pressing the tail of diaphragm to prevent tailing loosening in diaphragm cutting process, and the tab of electric core is prone to be folded in subsequent cutting process, increasing the defective rate of electric core 100.

[0031] The utility model embodiment provides a kind of tailing press roller structure, and the tab of the end of electric core is folded, and the tab is pre-folded along the end surface direction towards electric core, can retain the section of electric core with tab not cutting, improve the processing efficiency of battery.

[0032] The following will be described in detail in combination with Figures 2-5 The technical scheme provided by the utility model is described in more detail.

[0033] Example 1:

[0034] The utility model provides tailing press roller structure, including base 4, press roller 1 and pre-folding part 2, wherein: press roller 1 is rotatably connected on base 4, pre-folding part 2 is fixed on the end of press roller 1, the side of pre-folding part 2 towards press roller 1 has inclined surface 21, inclined surface 21 is compared with the axis direction of press roller 1 Inclined setting, inclined surface 21 is used to pre-fold tab 101 along the end surface direction towards electric core 100.

[0035] The tailing press roller structure of the embodiment, pre-folding part 2 is arranged at the end of press roller 1, electric core 100 cooperates with press roller 1, tailing press roller 1 is pressed in diaphragm cutting process The tail of diaphragm is prevented from loosening, and pre-folding part 2 is folded to the tab 101 of the end of electric core 100, the tab 101 is pre-folded along the end surface direction towards electric core 100, which can prevent the tab 101 of electric core 100 from being folded in subsequent cutting process, can retain the section of electric core 100 with tab 101 not cutting, improve the processing efficiency of battery.

[0036] The tail pressing roller structure of the embodiment has the function of pressing the tail of the diaphragm to prevent the tail from loosening during the diaphragm cutting process, and the pre-folding part 2 can pre-fold the tab 101 in the direction of the end surface of the battery cell 100. In the prior art, the positive and negative tabs are pre-folded once before being inserted, and are pre-folded again during winding. The tail pressing roller structure of the embodiment pre-folds the tab 101 of the battery cell 100 for the third time.

[0037] As an optional embodiment, referring to Figure 3 , the pre-folding part 2 is coaxial with the pressing roller 1 to improve the stability of the structure, and the pre-folding part 2 rotates synchronously with the pressing roller 1 along the same axis.

[0038] As an optional embodiment, referring to Figure 3 , the pre-folding part 2 is arranged protruding from the surface of the pressing roller 1 around the axis of the pressing roller 1, so as to ensure that the pre-folding part 2 can pre-fold the tab 101 at the end of the battery cell 100.

[0039] As an optional embodiment, referring to Figure 2 , Figure 3 , the pre-folding part 2 has a circular truncated cone structure, the narrow end of the circular truncated cone structure is fixedly connected with the end of the pressing roller 1, the wide end of the circular truncated cone structure is fixedly connected with the roller shaft 3 of the pressing roller 1, and the circumferential side surface of the circular truncated cone structure is configured as an inclined surface 21. Specifically, referring to Figure 3 , the diameter of the narrow end of the circular truncated cone structure is equal to the diameter of the pressing roller 1.

[0040] The pre-folding part 2 of the structure, when the battery cell 100 cooperates with the pressing roller 1, rotates synchronously with the pressing roller 1 and the pre-folding part 2, and the circumferential side surface of the pre-folding part 2, i.e. the inclined surface 21, can pre-fold the tab 101 at the end of the battery cell 100. Specifically, the tab 101 is pre-folded in the direction of the end surface of the battery cell 100, preventing the tab 101 of the battery cell 100 from being folded in the subsequent cutting process. A section of the battery cell 100 with the tab 101 can be retained without being cut, improving the processing efficiency of the battery.

[0041] As an optional embodiment, referring to Figures 2-5 , the pre-folding part 2 is fixed to only one end of the pressing roller 1.

[0042] Since the tab 101 is located at one end of the battery cell 100, the above structure can ensure pre-folding of the tab 101 of the battery cell 100 without the need to add extra structural components.

[0043] As an optional embodiment, referring to Figure 2 , Figure 4 , and 5As shown, the base 4 is fixed with a roller support 4, and the compression roller 1 is rotatably connected with the roller support 4 through a roller shaft 3. Specifically, the roller support 4 is in a U-shaped structure, and the roller shaft 3 is rotatably connected with the vertical section of the U-shaped structure.

[0044] The above structure can improve the stability of the overall structure, and the compression roller 1 and the pre-folding part 2 are stably rotated on the roller support 4 through the roller shaft 3.

[0045] As an optional embodiment, the pre-folding part 2 of the present embodiment is in an integrated structure with the compression roller 1, without the need for additional connecting components, thereby improving the stability of the structure.

[0046] Referring to Figures 2-5 As shown, the compression roller 1 can press the tail of the diaphragm to prevent loosening during the diaphragm cutting process. On the basis of the original compression roller 1, the pre-folding part 2 is fixed to one end of the compression roller 1, and the inclined surface 21 on the pre-folding part 2 realizes the pre-folding of the tab 101. The end compression roller structure of the present embodiment can simultaneously have the functions of the compression roller 1 pressing the diaphragm and the tab 101 pre-folding (third pre-folding).

[0047] Embodiment 2:

[0048] The present embodiment provides a battery production device comprising the above end compression roller structure.

[0049] The battery is a cylindrical battery, and the section of the battery cell 100 having the tab 101 is a non-cutting section.

[0050] The battery production device of the present embodiment can be used to produce a cylindrical battery. The compression roller 1 can press the tail of the diaphragm to prevent loosening during the diaphragm cutting process, and the pre-folding part 2 can pre-fold the tab 101 along the direction of the end face of the battery cell 100. This can prevent the tab 101 of the battery cell 100 from being folded in the subsequent cutting process. In the production of the battery, the section of the battery cell 100 having the tab 101 can be left uncut, thereby improving the processing efficiency of the battery.

[0051] In the description of the present specification, specific features, structures or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0052] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0053] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A tail press roller structure, characterized by, The structure comprises a base, a pressing roller and a pre-folding part, wherein: the pressing roller is rotationally connected to the base, the pre-folding part is fixed to the end of the pressing roller, the side of the pre-folding part facing the pressing roller has an inclined surface, the inclined surface is arranged obliquely to the axis direction of the pressing roller, and the inclined surface is used for pre-folding the tab along the direction of the end surface of the battery cell.

2. The tail press roller structure according to claim 1, characterized in that, The pre-folding part is coaxial with the pressing roller.

3. The tail press roller structure according to claim 1, characterized by, The pre-folding part is arranged protruding from the surface of the pressing roller around the axis of the pressing roller.

4. The finishing press structure according to claim 1 or 2, characterized in that The pre-folding part is in the structure of a circular truncated cone, the narrow end of the circular truncated cone is fixedly connected to the end of the pressing roller, the wide end of the circular truncated cone is fixedly connected to the roller shaft of the pressing roller, and the circumferential surface of the circular truncated cone is configured as the inclined surface.

5. The tail press roller structure according to claim 1, wherein The pre-folding part is fixed to only one end of the pressing roller.

6. The tail press roller structure according to claim 1, wherein The base is fixed with a roller support, and the pressing roller is rotationally connected to the roller support through a roller shaft.

7. The tail press roller structure according to claim 6, characterized in that, The roller support is in the structure of a U-shaped structure, and the roller shaft is rotationally connected to the vertical section of the U-shaped structure.

8. The tail press roller structure of claim 1, wherein The pre-folding part and the pressing roller are in the structure of an integral molding type.

9. A battery production apparatus characterized by comprising: The structure comprises the tail-end pressing roller of any one of claims 1-8.

10. The battery production apparatus according to claim 9, wherein The battery is a cylindrical battery, and the section of the battery cell having the tab is a non-cutting section.

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