Welding device, packaging welding machine and manufactured blade battery

Abstract

The utility model discloses a welding device, a packaging welding machine and a manufactured blade battery, the welding device comprises a loading mechanism and a welding mechanism, the loading mechanism comprises a loading seat, the loading seat is used for placing a side supporting piece and a Mylar film, the upper surface of the loading seat is provided with a supporting piece groove for placing the side supporting piece, and the Mylar film is laid on the upper surface of the loading seat; the welding mechanism comprises at least two welding assemblies, the welding assemblies are arranged at intervals in the direction parallel to the length of the supporting piece groove, and the welding assemblies are used for welding the side supporting pieces and the Mylar film. The welding mechanism is used for welding the side supporting sheet on the surface of the Mylar film in advance, and when the surface of the battery cell is coated with the Mylar film subsequently, the Mylar film can be ensured to flatly cover the surface of the battery cell. The method can be widely applied to the technical field of lithium battery manufacturing.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery manufacturing, and in particular to a welding device and a packaging welding machine and a blade battery manufactured thereby. Background Art

[0002] Mylar film is used for packaging on the surface of battery cells due to its good transparency, insulation and flexibility, and is welded and fixed to enhance the protection of the battery cells and the insulation between the battery cells and the shell. Currently, most lithium battery manufacturers use automated packaging welding machines to complete the packaging welding of Mylar film on battery cells, replacing manual operations, which not only improves production efficiency but also reduces pollution to battery cells and Mylar film. However, due to the soft nature of the Mylar film, wrinkles may occur when the Mylar film is coated on the surface of the battery cell, resulting in unevenness or non-fitting to the surface of the battery cell, affecting the subsequent production of the battery such as the battery cell shell. Utility Model Content

[0003] In order to solve at least one of the above-mentioned technical problems, the present application provides a welding device, a packaging welding machine and a blade battery manufactured thereby, and the technical solution adopted is as follows.

[0004] The blade battery provided in this application is made using a packaging welding machine.

[0005] The packaging welding machine provided in the present application includes a welding device.

[0006] The welding device provided in the present application includes a loading mechanism and a welding mechanism. The loading mechanism includes a loading seat, which is used to place a side support sheet and a Mylar film. The upper surface of the loading seat is provided with a support groove for placing the side support sheet. The welding mechanism includes a welding assembly, which is provided with at least two welding assemblies. The welding assemblies are arranged at intervals in a direction parallel to the length of the support groove, and the welding assemblies are used to weld the side support sheet and the Mylar film.

[0007] In certain embodiments of the present application, the packaging welding machine has a loading position and a support welding position, and the loading seat can be moved to switch to the loading position or the support welding position.

[0008] In certain embodiments of the present application, the loading mechanism includes a loading drive assembly and a loading guide structure, the loading drive assembly is connected to the loading seat, and the loading seat is slidably connected to the loading guide structure; the loading drive assembly drives the loading seat to move along the loading guide structure so that the loading seat switches to the loading position or the support welding position.

[0009] In certain embodiments of the present application, a negative pressure suction portion is provided at the bottom of the support slot, and the negative pressure suction portion fixes the side support in the support slot by means of negative pressure adsorption.

[0010] In some embodiments of the present application, the negative pressure suction portion is configured as a negative pressure suction hole.

[0011] In certain embodiments of the present application, a first positioning protrusion is provided at the bottom and / or side wall of the support slot, and the first positioning protrusion is used to locate the position of the side support in the support slot.

[0012] In certain embodiments of the present application, a second positioning protrusion is disposed on the upper surface of the loading seat, and the second positioning protrusion is used to locate the position of the Mylar film on the loading seat.

[0013] In certain embodiments of the present application, the welding mechanism includes a welding drive assembly, a welding movable seat and a welding guide structure, the welding drive assembly is connected to the welding movable seat, the welding assembly is arranged on the welding movable seat, and the welding movable seat is slidably connected to the welding guide structure; the welding drive assembly drives the welding movable seat to move downward along the welding guide structure so that the welding assembly abuts against the surface of the Mylar film.

[0014] The embodiments of the present application have at least the following beneficial effects: in the loading mechanism, the side support sheet is placed on the upper surface of the loading seat, the Mylar film is laid on the upper surface of the loading seat, and the loading seat is designed to be used for placing the support sheet groove of the side support sheet to avoid the Mylar film being uneven. The welding mechanism pre-welds the side support sheet to the surface of the Mylar film, and when the Mylar film is subsequently coated on the surface of the battery cell, it can ensure that the Mylar film is evenly covered on the surface of the battery cell. The present application can be widely used in the field of lithium battery manufacturing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The aspects and advantages described and / or attached in the embodiments of the present application will become apparent and easy to understand in conjunction with the following drawings. It should be noted that the embodiments embodied in the following drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0016] Figure 1 This is a structural diagram of the welding device.

[0017] Figure 2 for Figure 1 Partial view of area A in the middle.

[0018] Figure 3 This is the structural diagram of the loading mechanism.

[0019] Figure 4 This is the structural diagram of the welding mechanism.

[0020] Figure numerals: 1000, loading mechanism; 1100, loading seat; 1101, supporting slot; 1102, first positioning protrusion; 1103, second positioning protrusion; 1201, loading drive assembly; 1202, loading guide structure; 2000, welding mechanism; 2100, welding assembly; 2201, welding drive assembly; 2202, welding movable seat; 2203, welding guide structure; 2300, welding support frame. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1 To Attachment Figure 4 Embodiments of the present application are described in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0022] In the description of the present application, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, it 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 specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The features defined as "first" and "second" are used to distinguish the feature names, rather than having special meanings. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] The present application relates to a blade battery, which is manufactured by a packaging welding machine.

[0025] The blade battery consists of a battery cell and a Mylar film, and the packaging welding machine wraps the Mylar film on the surface of the battery cell.

[0026] Furthermore, the blade battery includes a side support sheet, which is pre-arranged on the Mylar film, fixed to the surface of the Mylar film, and attached to one side of the battery cell.

[0027] Specifically, after the Mylar film wraps the battery cell, the side support sheet extends in a direction parallel to the length of the battery cell, the side support sheet fits with one side surface of the battery cell in the thickness direction, and the end of the Mylar film is folded and welded at the other side surface of the battery cell in the thickness direction.

[0028] It can be understood that the side support sheets play a role in supporting the Mylar film so as to shape the Mylar film.

[0029] The present application relates to a packaging welding machine, which comprises a welding device, and the welding device welds a side support sheet to a Mylar film.

[0030] Furthermore, the packaging welding machine also includes a second welding device, and after the Mylar film is coated on the surface of the battery core, the second welding device is used to weld and fix the Mylar film to the battery core.

[0031] The other structures and operations of the blade battery and packaging welding machine have been recorded in the relevant technology for ordinary technicians in this field and will not be described in detail here. The structure of the welding device will be introduced below.

[0032] The present application relates to a welding device, which includes a loading mechanism 1000 and a welding mechanism 2000. A side support sheet and a Mylar film are arranged in the loading mechanism 1000, and the welding mechanism 2000 welds and fixes the Mylar film and the side support sheet.

[0033] It should be noted that, in the welding packaging machine, the welding device and the second welding device are arranged adjacent to each other, so that the side support sheet and the Mylar film welded in the welding device are transferred to the second welding device.

[0034] In conjunction with the accompanying drawings, the loading mechanism 1000 includes a loading seat 1100, which is set as a flat plate structure and is used to place the side support sheet and the Mylar film. On the upper surface of the loading seat 1100, the side support sheet is placed first, and then the Mylar film is placed. The Mylar film covers the side support sheet, and the side support sheet is located in the middle area of ​​the Mylar film, so that the Mylar film can be folded with the side support sheet as a boundary when covering the battery cell.

[0035] Furthermore, a sheet support groove 1101 is provided on the upper surface of the loading seat 1100. Specifically, the sheet support groove 1101 is recessed and formed on the upper surface of the loading seat 1100 or the sheet support groove 1101 is opened on the upper surface of the loading seat 1100, and the sheet support groove 1101 is adapted to the shape of the side support sheet. It can be understood that the sheet support groove 1101 is used to place the side support sheet to ensure that the Mylar film covering the surface of the side support sheet is flat.

[0036] As an implementation mode, a negative pressure suction portion is provided at the bottom of the support slot 1101, and the negative pressure suction portion fixes the side support in the support slot 1101 by negative pressure adsorption to prevent the position of the side support from shifting during welding.

[0037] It should be noted that at least two negative pressure suction parts are provided to form multiple-point fixation for the side support piece. Further, the negative pressure suction parts are arranged at intervals along the length direction of the support piece slot 1101 at the bottom of the support piece slot 1101 and are provided in at least one row.

[0038] Further, the negative pressure suction part is configured as a negative pressure suction hole, which is connected to a negative pressure source, thereby generating a negative pressure adsorption effect on the surface of the side support. It can be understood that the loading seat 1100 has a negative pressure cavity, the negative pressure suction hole is connected to the negative pressure cavity, and the negative pressure cavity is connected to a negative pressure source.

[0039] Of course, the negative pressure suction part can at least be replaced by a suction cup.

[0040] In some examples, a first positioning protrusion 1102 is provided at the bottom of the support slot 1101, at least one first positioning protrusion 1102 is provided, and the first positioning protrusion 1102 is used to position the side support in the support slot 1101. Further, in some examples, at least two first positioning protrusions 1102 are provided.

[0041] It can be understood that the side support sheet is provided with corresponding positioning holes, the Mylar film is provided with corresponding positioning holes, and the first positioning protrusion 1102 passes through the positioning holes of the side support sheet and the Mylar film in sequence to ensure accurate positioning between the side support sheet and the Mylar film.

[0042] Regarding the setting of the first positioning protrusion 1102 , there are at least the following alternative examples: the side wall of the wafer-supporting slot 1101 is provided with the first positioning protrusion 1102 ; or, the bottom and side wall of the wafer-supporting slot 1101 are both provided with the first positioning protrusion 1102 .

[0043] As an implementation manner, a second positioning protrusion 1103 is disposed on the upper surface of the loading seat 1100 , and the second positioning protrusion 1103 is used to locate the position of the Mylar film on the loading seat 1100 . There is at least one second positioning protrusion 1103 , and the Mylar film has a corresponding positioning hole.

[0044] The loading seat 1100 can improve the position accuracy between the Mylar film and the side support sheet by designing the second positioning protrusion 1103, and can also play a role in preventing the Mylar film from being misplaced, thereby avoiding the Mylar film from being placed in the wrong position.

[0045] As an embodiment, the packaging welding machine has a loading position and a support sheet welding position, the welding mechanism 2000 is arranged in the area where the support sheet welding machine position is located, and the loading seat 1100 can be moved to switch to the loading position or the support sheet welding position. It can be understood that at the loading position, the side support sheet and the Mylar film are placed on the loading seat 1100, and the loading seat 1100 moves from the loading position to the support sheet welding position.

[0046] Specifically, with the direction parallel to the front-rear direction as the first direction, the loading seat 1100 moves along the direction parallel to the first direction to move from the loading position to the support piece welding position, or from the support piece welding position to the loading position.

[0047] It can be understood that the loading mechanism 1000 includes a loading drive assembly 1201, which is connected to the loading base 1100, and drives the loading base 1100 to move so that the loading base 1100 switches to the loading position or the support welding position. The loading drive assembly 1201 drives the loading base 1100 to move in the form of belt drive, screw drive, or cylinder drive.

[0048] In some examples, the loading mechanism 1000 includes a loading guide structure 1202, and the loading seat 1100 is slidably connected to the loading guide structure 1202. It is understood that the loading drive assembly 1201 drives the loading seat 1100 to move along the loading guide structure 1202, so that the loading seat 1100 moves smoothly to the loading position or the support welding position.

[0049] Further, at least one loading guide structure 1202 is provided, the loading guide structure 1202 extends parallel to the first direction, and the loading guide structure 1202 is provided as a slide rail, a slide rod, or a slide groove.

[0050] As an embodiment, the welding mechanism 2000 includes a welding assembly 2100, which is used to weld the side support sheet and the Mylar film. The welding assembly 2100 performs welding in a hot melt manner. Specifically, the welding assembly 2100 is provided with a hot melt bar, and further, the welding assembly 2100 is provided with at least two rows of hot melt bars.

[0051] In conjunction with the accompanying drawings, at least two welding assemblies 2100 are provided, and the welding assemblies 2100 are arranged at intervals in a direction parallel to the length of the support slot 1101. Considering that the battery cell of the blade battery is very long, in order to ensure the welding strength between the Mylar film and the side support, the welding mechanism 2000 is provided with at least two welding assemblies 2100 at intervals.

[0052] The direction parallel to the left-right direction is the second direction, the support slot 1101 extends parallel to the second direction, each welding assembly 2100 is arranged at intervals parallel to the second direction, and the hot melt bar of the welding assembly 2100 extends parallel to the second direction.

[0053] It should be noted that when the loading seat 1100 moves to the support welding machine position, the welding assembly 2100 is located above the loading seat 1100. Therefore, the welding mechanism 2000 is designed so that the welding assembly 2100 can move up and down so that the welding assembly 2100 abuts against the surface of the Mylar film.

[0054] As an embodiment, the welding mechanism 2000 includes a welding drive assembly 2201 and a welding movable seat 2202. The welding drive assembly 2201 is connected to the welding movable seat 2202, and the welding assembly 2100 is disposed on the welding movable seat 2202. In conjunction with the drawings, at least two welding assemblies 2100 are arranged on the welding movable seat 2202 at intervals.

[0055] It is understood that the welding drive assembly 2201 drives the welding movable seat 2202 to move downward so that the welding assembly 2100 abuts against the surface of the Mylar film. The welding drive assembly 2201 drives the welding movable seat 2202 to move up and down in the form of belt drive, screw drive or cylinder drive.

[0056] Furthermore, the welding assembly 2100 is elastically arranged on the welding movable seat 2202, so that the welding assembly 2100 elastically abuts the Mylar film, avoiding the welding assembly 2100 from excessively pressing down the Mylar film, and preventing the Mylar film from being damaged. Specifically, a spring is arranged between the welding assembly 2100 and the welding movable seat 2202. With reference to the accompanying drawings, the welding assembly 2100 is connected to the welding movable seat 2202 via a connecting rod sleeved with a spring.

[0057] In some examples, the welding mechanism 2000 includes a welding guide structure 2203, and the welding movable seat 2202 is slidably connected to the welding guide structure 2203. It can be understood that the welding drive assembly 2201 drives the welding movable seat 2202 to move downward along the welding guide structure 2203, so that the welding movable seat 2202 moves smoothly.

[0058] Furthermore, at least one welding guide structure 2203 is provided, and the welding guide structure 2203 extends parallel to the up-down direction, and the welding guide structure 2203 is provided as a slide rail, a slide rod, or a slide groove.

[0059] In some examples, the welding mechanism 2000 includes a welding support frame 2300 , the welding drive assembly 2201 is disposed on the welding support frame 2300 , and the welding guide structure 2203 is disposed on the welding support frame 2300 .

[0060] The contents of the present application are described in detail below in conjunction with specific embodiments. It should be noted that the following description is only for illustrative purposes and is not a specific limitation to the present application.

[0061] The welding device welds the side support sheet to the surface of the Mylar film including the following working process.

[0062] At the loading position, a side support sheet is placed on the loading seat 1100 , and a Mylar film is placed on the upper surface of the loading seat 1100 , with the Mylar film covering the side support sheet.

[0063] Parallel to the first direction, the loading seat 1100 moves to the support plate welding position, and the welding mechanism 2000 welds the Mylar film and the side support plate.

[0064] Parallel to the first direction, the loading seat 1100 moves to the loading position, takes out the Mylar film welded with the side support sheets from the loading seat 1100, and replaces the side support sheets and the Mylar film.

[0065] In the description of this specification, if the reference terms "one embodiment", "some examples", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0066] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

[0067] In the description of this application, if "," appears in the patent name, it means an "and" relationship, not an "or" relationship. For example, if the patent name is "a kind of A, B", it means that the content required to be protected by this application is: the technical solution with the subject name A and the technical solution with the subject name B.

Claims

1. A welding device, characterized in that: include A loading mechanism (1000), the loading mechanism (1000) comprising a loading seat (1100), the loading seat (1100) being used to place a side support sheet and a Mylar film, and the upper surface of the loading seat (1100) being provided with a support sheet groove (1101) for placing the side support sheet; A welding mechanism (2000), the welding mechanism (2000) comprising a welding assembly (2100), the welding assembly (2100) being arranged in at least two, the welding assemblies (2100) being arranged at intervals in a direction parallel to the length of the support groove (1101), and the welding assembly (2100) being used for welding a side support and a Mylar film.

2. The welding device according to claim 1, characterized in that: The packaging welding machine has a loading position and a support welding position, and the loading seat (1100) can be moved to switch to the loading position or the support welding position.

3. The welding device according to claim 2, characterized in that: The loading mechanism (1000) comprises a loading drive assembly (1201) and a loading guide structure (1202); the loading drive assembly (1201) is connected to the loading seat (1100), and the loading seat (1100) is slidably connected to the loading guide structure (1202); the loading drive assembly (1201) drives the loading seat (1100) to move along the loading guide structure (1202), so that the loading seat (1100) switches to the loading position or the support welding position.

4. The welding device according to claim 1, characterized in that: A negative pressure suction portion is provided at the bottom of the sheet-supporting slot (1101), and the negative pressure suction portion fixes the side sheet in the sheet-supporting slot (1101) by means of negative pressure adsorption.

5. The welding device according to claim 4, characterized in that: The negative pressure suction portion is provided as a negative pressure suction hole.

6. The welding device according to claim 1, 4 or 5, characterized in that: The bottom and / or side wall of the support slot (1101) is provided with a first positioning protrusion (1102), and the first positioning protrusion (1102) is used to locate the position of the side support in the support slot (1101).

7. The welding device according to claim 1, characterized in that: The upper surface of the loading seat (1100) is provided with a second positioning protrusion (1103), and the second positioning protrusion (1103) is used to locate the position of the Mylar film on the loading seat (1100).

8. The welding device according to claim 1, characterized in that: The welding mechanism (2000) comprises a welding drive assembly (2201), a welding movable seat (2202) and a welding guide structure (2203); the welding drive assembly (2201) is connected to the welding movable seat (2202); the welding assembly (2100) is arranged on the welding movable seat (2202); the welding movable seat (2202) is slidably connected to the welding guide structure (2203); the welding drive assembly (2201) drives the welding movable seat (2202) to move downward along the welding guide structure (2203) so that the welding assembly (2100) abuts against the surface of the Mylar film.

9. A packaging welding machine, characterized in that: Comprising the welding device according to any one of claims 1 to 8.

10. A blade battery, characterized in that: The blade battery is manufactured using the packaging welding machine as described in claim 9.

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