Lamination equipment

Abstract

The utility model relates to the technical field of battery production, and particularly discloses lamination equipment which comprises a lamination platform, a first pressing piece, a second pressing piece and a cutter, and a lamination station is arranged on the lamination platform. In the process of carrying out the lamination process on the lamination station, the first pressing piece can tightly press the material; and when the diaphragm needs to be cut off by the cutter after lamination is completed, the second pressing piece can tightly press the diaphragm, so that the end part of the cut-off diaphragm is still fixed on the lamination platform. Wherein the firm degree of fixation of the diaphragm can be improved in a mode of pressing by the second pressing piece, on one hand, the condition that the diaphragm is wrinkled when the diaphragm is cut off by the cutter is reduced, and on the other hand, the lamination efficiency is favorably improved, so that the overall operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production, in particular to a lamination equipment. BACKGROUND

[0002] In the production process of the electrode sheet battery, a lamination process is needed. The lamination process forms a compact and stable battery cell by orderly stacking the cut positive and negative electrode sheets and the separator. This layered structure not only facilitates efficient transmission of electric charges between the positive and negative electrodes, but also significantly improves the charge and discharge performance of the battery due to its low internal resistance and uniform heat distribution.

[0003] There are two ways of lamination, Z-shaped lamination and composite lamination. Z-shaped lamination is achieved by folding the separator in a Z-shaped manner through a movable separator roller to lay the separator on the electrode sheet. Composite lamination is achieved by first forming a composite unit of the positive and negative electrode sheets and the separator, and then stacking them to form a battery cell.

[0004] In the existing lamination equipment, a movable separator roller is generally used to drive the separator to move back and forth; for example, the separator roller starts from the left side of the lamination table, moves to the right side to place the first electrode sheet, returns to the left side to place the second electrode sheet, and so on, until the battery cell is stacked to the preset number of layers, and then the separator is cut off by a cutter.

[0005] In actual application, the existing lamination equipment has the following problems:

[0006] 1. The cutting of the separator by the cutter will cause the separator to wrinkle;

[0007] 2. After the separator is cut by the cutter, it needs to be laid on the lamination table again before the next lamination process. To ensure the continuity of the lamination process, the existing method uses an adsorption mechanism to fix the end of the cut separator, and then the separator roller lays it, but a vacuum system needs to be added, which increases the structural complexity. Moreover, since the adsorption method of fixing the separator is not firm enough, in order to reduce the deviation of the separator, the moving speed of the separator roller will be limited, resulting in low overall work efficiency. SUMMARY

[0008] Therefore, the present application aims to provide a lamination equipment to solve all or part of the above problems.

[0009] To achieve the above technical purposes, the present application provides a lamination equipment, comprising:

[0010] a lamination platform, wherein a lamination station is arranged on the lamination platform;

[0011] a first pressing piece, which is movably arranged on the lamination platform and is used to press the material on the lamination station;

[0012] a second pressing member movably arranged on the laminating platform and configured to press the diaphragm outside the laminating station;

[0013] a cutter movably arranged between the second pressing member and the first pressing member and configured to cut the diaphragm.

[0014] Further, the laminating device further comprises a diaphragm conveying member;

[0015] The diaphragm conveying member is configured to convey the diaphragm.

[0016] At least one of the laminating platform and the diaphragm conveying member is movable along a first direction.

[0017] Further, the laminating device further comprises a diaphragm removing member;

[0018] The cutter is configured to cut the diaphragm when the diaphragm is arranged on the second pressing member, so as to form a waste diaphragm material on the second pressing member.

[0019] The diaphragm removing member is configured to remove the waste diaphragm material.

[0020] Further, the diaphragm removing member is a suction type diaphragm removing mechanism.

[0021] Further, the laminating platform is movable along the first direction between one side of the diaphragm conveying member and the other side of the diaphragm conveying member.

[0022] The diaphragm removing member is arranged on one side of the laminating platform along the first direction.

[0023] During the movement of the laminating platform from the other side of the diaphragm conveying member to one side of the diaphragm conveying member in the state that the second pressing member presses the diaphragm, the diaphragm is arranged on the second pressing member.

[0024] Further, the diaphragm conveying member comprises two diaphragm passing rollers.

[0025] The two diaphragm passing rollers are arranged in a spaced manner, so as to form a gap between the two diaphragm passing rollers for the diaphragm to pass through.

[0026] Further, the laminating platform comprises a platform body and a supporting table.

[0027] The laminating station and the first pressing member are arranged on the platform body.

[0028] The supporting table is arranged on the side of the laminating station along the first direction.

[0029] The second pressing member is arranged on the supporting table.

[0030] Further, the laminating platform comprises a lifting driving member.

[0031] A support table capable of lifting is arranged on the platform body;

[0032] The lamination station and the first pressing piece are arranged on the support table;

[0033] The output end of the lifting driving piece is connected to the support table, for driving the support table to lift.

[0034] Further, the first pressing piece is a reversible pressing knife.

[0035] Further, the second pressing piece is a reversible pressing knife.

[0036] From the above technical solution, it can be seen that the present application provides a lamination device, comprising: a lamination platform, a first pressing piece, a second pressing piece and a cutter; a lamination station is arranged on the lamination platform. During the lamination process in the lamination station, the first pressing piece can press the material tightly; when the cutter is needed to cut the diaphragm after the lamination is completed, the second pressing piece can press the diaphragm tightly, so that the cut end of the diaphragm is still fixed on the lamination platform. Among them, the way of pressing by the second pressing piece can improve the firmness of the fixed diaphragm, on the one hand, it can reduce the wrinkling of the diaphragm when the cutter cuts the diaphragm, on the other hand, it can help to improve the lamination efficiency and thus improve the overall work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0038] Figure 1 A schematic view of a lamination device provided by an embodiment of the present application when placing a gasket at the stage when lamination is about to be completed;

[0039] Figure 2 A schematic view of a lamination device provided by an embodiment of the present application when the first pressing piece presses the gasket tightly at the stage when lamination is about to be completed;

[0040] Figure 3 A schematic view of a lamination device provided by an embodiment of the present application when the second pressing piece presses the diaphragm tightly at the stage when lamination is completed;

[0041] Figure 4 A schematic view of a lamination device provided by an embodiment of the present application when the cutter cuts the diaphragm at the stage when lamination is completed;

[0042] Figure 5A schematic view of a lamination device provided by an embodiment of the present application in a lamination initial stage putting new gaskets;

[0043] Figure 6 A schematic view of a lamination device provided by an embodiment of the present application in a lamination initial stage moving the lamination platform to wrap the diaphragm around the second pressing piece and lay on the gaskets;

[0044] Figure 7 A schematic view of a lamination device provided by an embodiment of the present application in a lamination initial stage pressing the diaphragm by the first pressing piece;

[0045] Figure 8 A schematic view of a lamination device provided by an embodiment of the present application in a lamination initial stage cutting the diaphragm on the second pressing piece by the cutter to form waste film material;

[0046] In the figure:

[0047] 100, lamination platform; 101, platform main body; 102, support table; 103, lifting driving piece; 104, support table; 110, first pressing piece; 120, second pressing piece; 130, lamination station;

[0048] 200, cutter;

[0049] 300, diaphragm; 310, waste film material;

[0050] 400, diaphragm removing piece;

[0051] 500, diaphragm conveying piece;

[0052] 610, gasket; 620, composite unit. DETAILED DESCRIPTION

[0053] The technical solutions of the embodiments of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0054] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0055] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited, the terms "mount", "connect", "connect" should be understood in a broad sense, for example, it can be fixedly connected, or it can be replaceably connected, or it can be integrally connected, 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 communication inside two elements. 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.

[0056] Please refer to Figure 1 The lamination device provided in the embodiments of the present application comprises a lamination platform 100, a first pressing piece 110, a second pressing piece 120 and a cutter 200.

[0057] The lamination platform 100 is provided with a lamination station 130. The lamination station 130 can be used for stacking materials thereon, i.e. for carrying out a lamination process. In the present embodiment, the materials include one or more of a diaphragm, a positive electrode sheet, a negative electrode sheet, a gasket 610 and a composite unit 620. The composite unit 620 is composed of a diaphragm 300 and an electrode sheet stack. The gasket 610 can be used as a bottom single-sided sheet and a top single-sided sheet to assist in fixing the positions of the electrode sheet and the diaphragm 300, so that the first pressing piece 110 can press the diaphragm more firmly, prevent the interlayer from shifting due to mechanical vibration or operation error, and reduce the damage to the diaphragm 300 caused by the direct contact between the first pressing piece 110 and the diaphragm. In the present embodiment, the lamination process performed on the lamination station 130 can be completed by using the existing technology, and therefore the details are not described herein.

[0058] The first pressing piece 110 is movably arranged on the lamination platform 100 and is used for pressing the materials on the lamination station 130. In the present embodiment, the movable manner of the first pressing piece 110 can be realized by, for example, overturning, lifting, lifting combined with translation, etc. Specifically, during the lamination process, the first pressing piece 110 can be moved to avoid the materials so that the materials can be placed on the lamination station 130, and then the materials can be pressed again.

[0059] The second pressing piece 120 is movably arranged on the laminating platform 100 and is used to press the diaphragm 300 outside the laminating station 130. Similarly, the movable mode of the second pressing piece 120 can be realized by, for example, overturning, lifting, lifting combined with translation, etc., so that the second pressing piece 120 can move to avoid the diaphragm 300 during the laminating process, so that the diaphragm covers the laminating station 130, and then the diaphragm is pressed again. The pressing surface of the second pressing piece 120 can be provided with a buffer pad to increase the friction between the second pressing piece 120 and the diaphragm 300, thereby improving the pressing effect of the second pressing piece 120 on the diaphragm 300, and better preventing the diaphragm 300 from being wrinkled during the cutting process, while avoiding damage to the diaphragm 300 by the second pressing piece 120.

[0060] The cutting knife 200 is movably arranged between the second pressing piece 120 and the first pressing piece 110 and is used to cut the diaphragm 300. The cutting knife 200 can cut the diaphragm 300 by rotating, translating or the like. When the cutting knife 200 cuts, the diaphragm 300 on both sides of the cutting knife 200 is pressed by the first pressing piece 110 and the second pressing piece 120, respectively, which can effectively prevent the diaphragm 300 from being displaced or deformed during the cutting process, avoid the diaphragm 300 from being wrinkled, and ensure the cutting quality. Then the laminated composite unit 620 and the gasket 610 are transferred to the next process.

[0061] The laminating device provided by the embodiment can be used for direct laminating of the battery cell and can also be used for re-laminating of the plurality of composite units 620. The direct laminating of the battery cell refers to a process of sequentially laminating the positive and negative plates and the diaphragm to form the whole battery cell. The re-laminating of the plurality of composite units 620 refers to a process of laminating the positive and negative plates and the diaphragm in different ways to form the composite unit 620, and then laminating the composite unit 620 into the battery cell.

[0062] Taking the laminating process of the composite unit 620 as an example, referring to Figure 2 and Figure 5 The laminating process of the laminating device provided by the embodiment includes the steps of gasket placement, diaphragm pressing and diaphragm cutting.

[0063] The gasket placement step is shown in Figure 2 After the composite unit 620 covers the last layer of diaphragm 300, the gasket 610 can be laid on the diaphragm 300 by a transfer tool such as a mechanical hand, and then the first pressing piece 110 presses the gasket 610. At this time, the gasket 610 can be a top single-sided sheet, which can press the battery cell and protect the diaphragm.

[0064] The diaphragm pressing step is shown in Figure 3 Specifically, the second pressing piece 120 moves to press the diaphragm 300 in the pressing area.

[0065] The diaphragm cutting step is as shown in Figure 4 Specifically, the cutter 200 moves to cut the diaphragm between the first pressing member 110 and the second pressing member 120, and then the composite unit 620 covering the gasket 610 can be taken away by the transfer mechanism.

[0066] After the composite unit 620 is taken away, the starting step of the new laminating process can be as shown in Figure 5 Specifically, a new gasket 610 is placed on the laminating station 130, and at this time the gasket 610 can be a bottom single-sided sheet. Then the diaphragm 300 can be covered on the gasket 610 to start a new laminating process.

[0067] In a more specific embodiment, the laminating device further comprises a diaphragm conveying member 500; the diaphragm conveying member 500 is used to convey the diaphragm 300. The process of covering the diaphragm is realized by the relative movement of the diaphragm conveying member 500 and the laminating platform 100. Specifically, at least one of the laminating platform 100 and the diaphragm conveying member 500 can move in the first direction. The first direction is the positive and negative direction of the X axis in Figure 1 , which is the horizontal direction in this embodiment.

[0068] Since the end of the diaphragm 300 is pressed by the second pressing member 120 before the next laminating process is performed, the diaphragm conveying member 500 and the laminating platform 100 can adopt a faster relative movement rate, thereby improving the covering efficiency of the diaphragm. At the same time, the flatness and alignment accuracy of the diaphragm 300 can be ensured by the second pressing member 120, thereby reducing the laminating error caused by the displacement of the diaphragm 300. This design not only improves the production efficiency, but also greatly reduces the waste rate, thereby ensuring the consistency and stability of the battery cell and laying a foundation for subsequent battery cell assembly and performance testing.

[0069] In the embodiments provided in the present application, the moving object is taken as the laminating platform 100 for example. The diaphragm conveying member 500 is fixed during the laminating process, and the covering of the diaphragm is completed by moving the laminating platform 100 in the first direction. That is, the laminating platform 100 can move between one side of the diaphragm conveying member 500 and the other side of the diaphragm conveying member 500 in the first direction. In the present application, the one side of the diaphragm conveying member 500 is the left side in the figure, and the other side of the diaphragm conveying member 500 is the right side in the figure.

[0070] In Figure 5 , after the laminating platform 100 places the new gasket 610 on the other side of the diaphragm conveying member 500, it moves to the one side of the diaphragm conveying member 500 in the first direction. The state after moving to the position is as shown in Figure 6 . Figure 6In this way, since the end of the diaphragm 300 is fixed, part of the diaphragm 300 will be wound on the second pressing member 120. The diaphragm 300 wound on the second pressing member 120 can be selected to be transferred with the battery cell to the next process after the end of the stacking process, or to be cut off by the cutter 200 and then removed immediately during the stacking process.

[0071] In one embodiment, referring to Figure 6 to Figure 8 , the stacking device further comprises a diaphragm removing member 400; the cutter 200 can cut off the diaphragm 300 when the diaphragm 300 is wound on the second pressing member 120, so as to form a waste diaphragm material 310 on the second pressing member 120; and the diaphragm removing member 400 is responsible for removing the formed waste diaphragm material 310.

[0072] Specifically, as shown in Figure 6 , after the stacking platform 100 moves to one side of the diaphragm conveying member 500, the pole piece can be placed on the stacking station 130 by the transfer mechanism. Then, as shown in Figure 7 , the first pressing member 110 presses the diaphragm 300 and the pole piece on the stacking station 130 tightly, and at this time, the diaphragm removing member 400 is aligned with the second pressing member 120. Then, as shown in Figure 8 , the cutter 200 moves to cut off the diaphragm between the second pressing member 120 and the first pressing member 110; the diaphragm 300 on the second pressing member 120 is separated from the diaphragm conveying member 500 and the stacking platform 100, and becomes the waste diaphragm material 310. Then, the second pressing member 120 is released from pressing, and the diaphragm removing member 400 can remove the waste diaphragm material 310.

[0073] In this scheme, the waste diaphragm material 310 is removed at the beginning of the stacking process, which effectively avoids the interference of the waste diaphragm material 310 on the subsequent process, and improves the smoothness and efficiency of the stacking process.

[0074] In practical application, the diaphragm removing member 400 can use a cleaning tool such as a brush roller to effectively remove the waste diaphragm material 310 by cleaning, so as to keep the stacking station clean.

[0075] As an embodiment, the diaphragm removing member 400 is a suction type diaphragm removing mechanism, that is, it separates the waste diaphragm material 310 from the second pressing member 120 by suction, and sucks it into a waste material collecting device, so as to completely remove the waste diaphragm material 310.

[0076] As an embodiment, the diaphragm removing member 400 can also be equipped with a sensing device to monitor the removal of the waste diaphragm material 310 in real time, so as to ensure that the removal process is accurate and efficient. The way to sense whether the waste diaphragm material 310 is removed can be, for example, through an infrared sensor or a photoelectric sensor, and whether the material in the material conveying channel inside the diaphragm removing member 400 passes through is sensed by the sensing device. Thus, it is determined whether the waste diaphragm material 310 has been completely removed.

[0077] In this embodiment, the diaphragm removing member 400 is arranged on one side of the lamination platform 100 along the first direction; when the second pressing member 120 is pressed against the diaphragm 300, the lamination platform 100 moves from the other side of the diaphragm conveying member 500 to the side of the diaphragm conveying member 500, and the diaphragm 300 is wrapped around the second pressing member 120.

[0078] As an implementation, the diaphragm removing member 400 can be fixed on the lamination platform 100 to move with it.

[0079] Another implementation is that the diaphragm removing member 400 is fixed outside the lamination platform 100 so as not to move with the lamination platform 100. In this configuration, when the lamination platform 100 moves to a designated position on the side of the diaphragm conveying member 500, the diaphragm removing member 400 can cover the top surface and side surface of the second pressing member 120, ensuring effective removal of the waste diaphragm material 310, while avoiding the situation that the diaphragm 300 and the diaphragm removing member 400 interfere with each other when the lamination platform 100 moves relative to the diaphragm conveying member 500.

[0080] In one embodiment, referring to Figure 1 , the diaphragm conveying member 500 includes two diaphragm passing rollers 510; the two diaphragm passing rollers 510 are arranged at intervals so as to form a gap between them for the diaphragm 300 to pass through.

[0081] In another embodiment, referring to Figure 1 and 2 , the lamination platform 100 includes a platform body 101 and a support table 102; the lamination station 130 and the first pressing member 110 are arranged on the platform body 101; the support table 102 is arranged on the side of the lamination station 130 along the first direction; and the second pressing member 120 is arranged on the support table 102.

[0082] In this embodiment, the first pressing member 110 and the second pressing member 120 are arranged on the platform body 101 and the support table 102 respectively, so that they are arranged separately, which on one hand facilitates maintenance and repair, and on the other hand facilitates individual control of the two, for example, when the platform body 101 is lifted, translated, etc., the second pressing member 120 does not need to move with it.

[0083] In actual application, the first pressing member 110 can be arranged inside the edge of the lamination station 130, or outside the edge of the lamination station 130.

[0084] In one embodiment, the lamination platform 100 includes a lifting drive 103; a liftable support table 104 is arranged on the platform body 101; the lamination station 130 and the first pressing member 110 are arranged on the support table 104; and the output end of the lifting drive 103 is connected to the support table 104 to drive the support table 104 to lift.

[0085] In the stacking process, the lifting driving member 103 drives the support table 104 to gradually descend with the increase of the stacking height of the materials, so as to ensure that the top surface of the materials is always kept consistent during the whole stacking process. In this way, the first pressing member 110 can adopt a reversible pressing knife, so that the first pressing member 110 only needs to be flipped at the same position to meet the continuous stacking of the materials during the stacking process.

[0086] In other embodiments, the second pressing member 120 can also adopt a reversible pressing knife.

[0087] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent replacements for some of the technical features, but any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A lamination apparatus characterized by, The application relates to a laminating platform (100) provided with a laminating station (130), a first pressing piece (110) movably arranged on the laminating platform (100) and used for pressing materials on the laminating station (130), a second pressing piece (120) movably arranged on the laminating platform (100) and used for pressing a diaphragm (300) outside the laminating station (130), and a cutter (200) movably arranged between the second pressing piece (120) and the first pressing piece (110) and used for cutting the diaphragm (300). The application further comprises a diaphragm conveying piece (500) used for conveying the diaphragm (300). At least one of the laminating platform (100) and the diaphragm conveying piece (500) can move along a first direction. The application further comprises a diaphragm removing piece (400). The cutter (200) can cut the diaphragm (300) when the diaphragm (300) is arranged on the second pressing piece (120), so that a waste diaphragm material (310) is formed on the second pressing piece (120).

2. The lamination apparatus of claim 1, wherein, The diaphragm removing piece (400) is used for removing the waste diaphragm material (310). The diaphragm removing piece (400) is a suction type diaphragm removing mechanism. The laminating platform (100) can move along the first direction between one side of the diaphragm conveying piece (500) and the other side of the diaphragm conveying piece (500).

3. The lamination apparatus of claim 2, wherein, The diaphragm removing piece (400) is arranged on one side of the laminating platform (100) along the first direction. When the second pressing piece (120) presses the diaphragm (300), the laminating platform (100) moves from the other side of the diaphragm conveying piece (500) to one side of the diaphragm conveying piece (500), and the diaphragm (300) is arranged on the second pressing piece (120). The diaphragm conveying piece (500) comprises two diaphragm passing rollers (510). The two diaphragm passing rollers (510) are arranged in a spaced mode, so that a gap for the diaphragm (300) to pass through is formed between the two diaphragm passing rollers (510).

4. The lamination apparatus of claim 3, wherein The laminating platform (100) comprises a platform body (101) and a supporting table (102).

5. The lamination apparatus of claim 3, wherein, The laminating station (130) and the first pressing piece (110) are arranged on the platform body (101). The supporting table (102) is arranged on the side of the laminating station (130) along a first direction. The second pressing piece (120) is arranged on the supporting table (102).

6. The lamination apparatus of claim 2, wherein, The laminating platform (100) comprises a lifting driving piece (103). A lifting supporting table (104) is arranged on the platform body (101).

7. The lamination apparatus of claim 1, wherein, The laminating station (130) and the first pressing piece (110) are arranged on the lifting supporting table (104). An output end of the lifting driving piece (103) is connected with the lifting supporting table (104) and used for driving the lifting supporting table (104) to lift. The first pressing piece (110) is a reversible pressing cutter. ​ 8. The lamination apparatus of claim 7, wherein, ​ ​ ​ ​ 9. The lamination apparatus of claim 7, wherein, ​ 10. The lamination apparatus of claim 7, wherein, The second pressing piece (120) is a reversible presser.

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