Battery protective film welding device

Abstract

The utility model discloses a battery protective film welding device which comprises a mounting seat, a pressing plate and a welding body, the mounting seat is provided with a positioning groove, the positioning groove is used for containing a cover plate assembly and a protective film, the pressing plate is provided with a positioning opening, the positioning opening is used for exposing the welding position of the protective film and the cover plate assembly, and the welding body is mounted on the mounting seat. And the welding body is opposite to the positioning opening. During welding, the cover plate assembly can be firstly placed in the positioning groove so that the cover plate assembly can be rapidly and accurately positioned below the welding head, then the protective film is attached to the welding face of the cover plate assembly, and after attachment, the protective film is pressed on the welding face of the cover plate assembly through the pressing plate. The welding position, used for being welded to the cover plate assembly, of the protective film is exposed out of the positioning opening, and therefore the welding body can penetrate through the positioning opening to weld the protective film to the cover plate assembly. The battery protective film welding device can position and weld a protective film and a cover plate assembly, and is high in welding quality.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a battery protection film welding device. Background Art

[0002] At present, the battery usually includes a shell and a cell. The cell is arranged in the shell. A top cover assembly is arranged on the top of the shell. A protective film is arranged on the outside of the cell. The protective film is used to prevent short circuits inside the battery or to prevent dust inside the battery. The protective film is generally hot-melt welded to the lower plastic part of the top cover assembly. When welding, the protective film is first placed directly on the top cover assembly, and then the top cover assembly and the protective film are manually placed under the welding device for welding. However, the prior art has the following defects: This method mainly judges whether the top cover assembly and the protective film are in place by visual inspection, and cannot ensure that the top cover assembly and the protective film are accurately placed on the welding area of ​​the welding device, resulting in poor welding effect and prone to poor welding. Utility Model Content

[0003] The purpose of the embodiment of the utility model is to provide a battery protective film welding device, which has a simple structure, can position and weld the protective film and the cover plate assembly, and has high welding quality.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A battery protection film welding device is provided, comprising:

[0006] A mounting seat, wherein the mounting seat is provided with a positioning groove, the positioning groove is used to accommodate the cover plate assembly and the protective film, and the cover plate assembly is adjacent to the bottom of the positioning groove;

[0007] A pressing plate, the pressing plate is used to press the protective film against the welding surface of the cover plate assembly, the pressing plate is provided with a positioning opening, the positioning opening is used to expose the welding position of the protective film and the cover plate assembly;

[0008] A welding body is installed on the mounting seat, and the welding body is directly opposite to the positioning opening. The welding body can pass through the positioning opening to weld the protective film and the cover plate assembly.

[0009] As a preferred solution of the battery protective film welding device, one of the mounting seat and the pressing plate is provided with a positioning slot, and the other of the mounting seat and the pressing plate is provided with an inserting portion, and the inserting portion is inserted into the positioning slot.

[0010] As a preferred solution of the battery protective film welding device, the mounting seat is also provided with two positioning plates, the two positioning plates are respectively located on opposite sides of the positioning groove, the pressure plate is arranged between the two positioning plates, and the pressure plate is connected to the positioning plates through fasteners.

[0011] As a preferred solution of the battery protective film welding device, the mounting seat includes a detachably connected substrate and a support plate, the welding body is mounted on the substrate, the support plate is provided with the positioning groove, the substrate is provided with a first positioning portion, and the support plate is provided with a second positioning portion, the first positioning portion is connected to the second positioning portion so that the positioning opening is aligned with the welding head of the welding body.

[0012] As a preferred solution of the battery protective film welding device, a plurality of the positioning openings are arranged on the pressing plate, a plurality of the first positioning portions are arranged at intervals on the substrate, and the second positioning portion is connected to one of the first positioning portions so that one of the positioning openings is aligned with the welding head.

[0013] As a preferred solution of the battery protection film welding device, one of the first positioning portion and the second positioning portion is an insertion convex portion, and the other of the first positioning portion and the second positioning portion is an insertion groove, and the insertion convex portion is inserted into the insertion groove;

[0014] Alternatively, one of the first positioning portion and the second positioning portion is a magnet, and the other of the first positioning portion and the second positioning portion is a magnetic attraction member that is magnetically attracted to the magnet.

[0015] As a preferred solution of the battery protection film welding device, a handle is provided on the support plate.

[0016] As a preferred solution of the battery protective film welding device, the welding body includes a welding head and a driving member, the driving member is connected to the welding head, and the driving member can drive the welding head to move close to the positioning opening to press the protective film and weld it to the cover plate assembly;

[0017] A buffer is also provided on the mounting seat. The buffer is located at the front side of the welding body along the moving direction of the welding head. The buffer can be connected to the welding body to buffer the pressing force of the welding head on the protective film.

[0018] As a preferred solution of the battery protection film welding device, it also includes a controller, which is connected to the welding body to control the welding time of the welding body.

[0019] As a preferred solution of the battery protection film welding device, the bottom of the positioning groove and the pressure plate are both provided with avoidance structures.

[0020] The beneficial effects of the utility model are as follows: during welding, the cover plate assembly can be first installed in the positioning groove, and the welding surface of the cover plate assembly is facing the welding head, so that the cover plate assembly can be quickly and accurately positioned in the welding area below the welding head, and then the protective film can be attached to the welding surface of the cover plate assembly. After attachment, the protective film is pressed tightly to the welding surface of the cover plate assembly by a pressing plate to prevent the protective film from moving relative to the cover plate assembly during welding, while ensuring the flatness of the protective film to improve the welding effect, and the positioning opening provided on the pressing plate can expose the welding position of the protective film and the cover plate assembly, so that the welding head can pass through the positioning opening and quickly and accurately rest on the welding position of the protective film and the cover plate assembly for hot-melt welding, thereby quickly and accurately positioning and welding the protective film to the welding surface of the cover plate assembly, with good welding effect, which can effectively reduce the welding defect rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described in detail below based on the drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the battery protection film welding device described in an embodiment of the utility model.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the battery protection film welding device (without a pressure plate) described in an embodiment of the utility model.

[0024] Figure 3 This is an assembly exploded view of the battery protection film welding device described in an embodiment of the utility model.

[0025] Figure 4 This is an assembly exploded view of the support plate, cover plate assembly and pressure plate described in an embodiment of the utility model.

[0026] Figure 5 It is a schematic diagram of the assembly of the base plate and the welding body described in the embodiment of the utility model.

[0027] In the figure:

[0028] 100. Cover plate assembly;

[0029] 1. Mounting seat; 11. Positioning groove; 12. Positioning plate; 13. Base plate; 14. Support plate; 15. Handle; 2. Press plate; 21. Positioning opening; 3. Welding body; 31. Welding head; 32. Driving member; 4. Positioning slot; 5. Plug-in part; 6. First positioning part; 7. Second positioning part; 8. Buffer member; 9. Controller; 10. Avoidance structure. DETAILED DESCRIPTION

[0030] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figures 1 to 4 As shown, a battery protective film welding device provided by the utility model includes a mounting seat 1, a pressing plate 2 and a welding body 3, the mounting seat 1 is provided with a positioning groove 11, the positioning groove 11 is used to accommodate the cover plate assembly 100 and the protective film, and the cover plate assembly 100 is adjacent to the bottom of the positioning groove 11, the pressing plate 2 is used to press the protective film to the welding surface of the cover plate assembly 100, and the welding surface is a side of the cover plate assembly 100 away from the positioning groove 11, and a positioning opening 21 is provided on the pressing plate 2, and the positioning opening 21 is used to expose the welding position of the protective film and the cover plate assembly 100, the welding body 3 is installed on the mounting seat 1, and the welding body 3 is opposite to the positioning opening 21 (in this embodiment, the welding body 3 is located directly above the positioning opening 21), and the welding body 3 can pass through the positioning opening 21 to weld the protective film and the cover plate assembly 100.

[0033] It can be understood that the welding head 31 of the welding body 3 is located above the positioning groove 11. During welding, the cover plate assembly 100 can be first installed in the positioning groove 11, and the welding surface of the cover plate assembly 100 is facing the welding head 31, that is, the positioning groove 11 can quickly and accurately position the cover plate assembly 100 in the welding area below the welding head 31, and then the protective film is attached to the welding surface of the cover plate assembly 100. After attachment, the protective film is pressed tightly against the welding surface of the cover plate assembly 100 by the pressing plate 2. The pressing plate 2 can prevent the protective film from moving relative to the cover plate assembly 100 during the welding process, and at the same time ensure the flatness of the protective film to improve the welding effect, and the positioning opening 21 opened on the pressing plate 2 can expose the welding position of the protective film and the cover plate assembly 100, so that the welding head 31 can pass through the positioning opening 21 and quickly and accurately rest on the welding position of the protective film and the cover plate assembly 100 for hot melt welding. Therefore, the battery protective film welding device of the present invention can quickly and accurately position and weld the protective film on the welding surface of the cover plate assembly 100, with good welding effect and low welding defect rate.

[0034] Further, refer to Figures 1 to 4 One of the mounting seat 1 and the pressing plate 2 is provided with a positioning slot 4, and the other of the mounting seat 1 and the pressing plate 2 is provided with a plug-in portion 5, which is inserted into the slot. Exemplarily, the mounting seat 1 is provided with a positioning slot 4, and the pressing plate 2 is provided with a plug-in portion 5 that plugs and cooperates with the positioning slot 4, so as to position the pressing plate 2 on the mounting seat 1, so that the positioning opening 21 can be accurately positioned at the welding position of the protective film and the cover plate assembly 100 to expose the welding position.

[0035] Furthermore, the mounting seat 1 is also provided with two positioning plates 12, and the two positioning plates 12 are respectively located on the opposite sides of the positioning groove 11, and the pressing plate 2 is arranged between the two positioning plates 12, and the pressing plate 2 is connected to the positioning plates 12 by fasteners. Exemplarily, both ends of the pressing plate 2 in the length direction are provided with plug-in parts 5, and the mounting seat 1 is provided with positioning slots 4 at positions corresponding to the plug-in parts 5, and the positioning plates 12 are fixedly arranged on the mounting seat 1. When the pressing plate 2 is installed on the mounting seat 1, the two positioning plates 12 are respectively located on both sides of the pressing plate 2 along the width direction, and the positioning plates 12 are provided with a first connecting hole, and the pressing plate 2 is provided with a second connecting hole. The fasteners include but are not limited to screws or pins, and the fasteners can pass through the first connecting hole and connect with the second connecting hole to lock the pressing plate 2 on the positioning plate 12, thereby ensuring that the pressing plate 2 is stably pressed against the protective film and cover plate assembly 100.

[0036] The existing cover plate assembly 100 has a first side surface and a second side surface facing each other. The first side surface is the side surface facing the battery core pack and the first side surface is the welding surface welded to the protective film. The second side surface is the side surface away from the battery core pack. Some parts (such as the pole, explosion-proof valve, injection structure, etc.) included in the cover plate assembly 100 will protrude from the first side surface and the second side surface, that is, the first side surface and the second side surface are not flat surfaces. Figures 1 to 4 The pressing plate 2 is fitted to the first side surface, and the side surface of the pressing plate 2 fitted to the first side surface matches the surface shape of the first side surface. The bottom of the positioning groove 11 is fitted to the second side surface, and the bottom of the positioning groove 11 matches the appearance shape of the second side surface. The bottom of the positioning groove 11 and the pressing plate 2 are both provided with an avoidance structure 10. The avoidance structure 10 can avoid the part of the cover plate assembly 100 protruding from the first side surface and the second side surface, so that the positioning groove 11 and the pressing plate 2 are perfectly fitted with the cover plate assembly 100 respectively to prevent the cover plate assembly 100 from being crushed.

[0037] Specifically, Figures 1 to 3 as well as Figure 5 As shown, the welding body 3 includes a welding head 31 and a driving member 32, and the driving member 32 is connected to the welding head 31. During welding, the driving member 32 can drive the welding head 31 to move close to the positioning opening 21, so that the welding head 31 passes through the positioning opening 21 and abuts against the protective film, and the protective film is heat-melted and welded to the cover plate assembly 100.

[0038] For example, continue to refer to Figures 1 to 3 as well as Figure 5 The driving member 32 includes but is not limited to a cylinder. A fixing mechanism for fixing the welding head 31 is provided at the output end of the cylinder. The fixing mechanism includes two clamping plates arranged opposite to each other. The opposite sides of the two clamping plates are both recessed with arc grooves. The two arc grooves together form a circular groove matching the circular outer circumferential surface of the welding head 31. The two clamping plates are connected by screws to clamp the welding head 31.

[0039] During welding, the welding head 31 needs to be pressed against the protective film to weld the protective film to the cover plate assembly 100. However, since the protective film is relatively thin, the welding head 31 is prone to crushing the protective film due to excessive pressing force. Figures 1 to 3 as well as Figure 5As shown, a buffer 8 is also provided on the mounting seat 1, and the buffer 8 is located at the front side of the welding body 3 along the moving direction of the welding head 31, and the buffer 8 can be connected to the welding body 3 to buffer the pressing force of the welding head 31 on the protective film. Exemplarily, the buffer 8 includes but is not limited to a hydraulic buffer or a spring, the output end of the driving member 32 faces the mounting seat 1, and the buffer 8 is located below the output end of the driving member 32. When the driving member 32 drives the welding head 31 to move for welding, the buffer 8 can abut against the output end to use the hydraulic pressure or elastic force to buffer the driving force of the driving member 32, thereby controlling the pressing force of the welding head 31 to prevent the pressing force of the welding head 31 from being too large and crushing the protective film.

[0040] Long welding time may also cause the protective film to break. Figures 1 to 3 as well as Figure 5 As shown, the battery protective film welding device also includes a controller 9, which includes but is not limited to a time relay. The controller 9 is connected to the welding body 3. The controller 9 can control the welding time of the welding body 3 to avoid damage to the protective film due to excessive welding time, and can also ensure that the time of each welding is consistent, which helps to improve the welding quality.

[0041] Optionally, refer to Figures 1 to 5 The mounting base 1 includes a detachably connected base plate 13 and a support plate 14, a vertical plate is arranged on the base plate 13, that is, the welding body 3 is installed on the vertical plate, the support plate 14 is provided with a positioning groove 11, a positioning slot 4 and a positioning plate 12, the base plate 13 is provided with a first positioning portion 6, the support plate 14 is provided with a second positioning portion 7, the first positioning portion 6 is connected to the second positioning portion 7 to realize the positioning assembly of the support plate 14 and the base plate 13, so that the positioning opening 21 can be quickly and accurately aligned with the welding head 31, so as to facilitate the welding of the welding head 31.

[0042] Since there are multiple welding positions between the protective film and the cover plate assembly 100, correspondingly, Figure 1 , Figure 3 as well as Figure 4As shown, the pressing plate 2 is provided with a plurality of positioning openings 21, and the positioning openings 21 correspond to the welding positions between the protective film and the cover plate assembly 100. In an optional embodiment, the welding body 3 includes a welding head 31, and the welding head 31 is directly opposite to one of the positioning openings 21, and the driving member 32 drives the welding head 31 to move close to the positioning opening 21 in the vertical direction to weld the protective film to the welding surface of the cover plate assembly 100. Specifically, a plurality of first positioning portions 6 are arranged at intervals on one side of the substrate 13, and the second positioning portion 7 is connected to one of the first positioning portions 6, so that one of the positioning openings 21 is aligned with the welding head 31. It can be understood that during welding, the cover plate assembly 100 can be first installed in the positioning groove 11 on the support plate 14, and then the protective film can be attached to the welding surface of the cover plate assembly 100. After attachment, the pressure plate 2 is positioned and installed on the support plate 14. After installation, the support plate 14 and the substrate 13 are assembled together through the first positioning portion 6 and the second positioning portion 7, so that one of the positioning openings 21 is aligned with the welding head 31, so that the welding head 31 can weld one of the welding positions of the protective film and the cover plate assembly 100. After welding, the support plate 14 is removed, and then the second positioning portion 7 is connected to the other first positioning portion 6, so that the other positioning openings 21 can be aligned with the welding head 31 respectively, so as to weld the other welding positions of the protective film and the cover plate assembly 100, thereby realizing the positioning welding of the protective film and the cover plate assembly 100.

[0043] In this embodiment, the pressure plate 2 is provided with two groups of positioning openings 21 along the width direction, and each group of positioning openings 21 includes a plurality of positioning openings 21 spaced apart along the length direction of the pressure plate 2. The number of first positioning portions 6 is the same as the number of each group of positioning openings 21. Second positioning portions 7 are provided on both side surfaces of the support plate 14 along the width direction. When one of the second positioning portions 7 is connected to the first positioning portion 6, one of the positioning openings 21 in a group of positioning openings 21 on the same side of the second positioning portion 7 can be aligned with the welding head 31 and welded. After welding, the second positioning portions 7 of the rear cover are respectively connected to the other first positioning portions 6 to allow the welding head 31 to be welded. After the welding on the same side is completed, the other second positioning portions 7 are respectively connected to the first positioning portion 6 to allow the welding head 31 to be welded, thereby completing the welding of the protective film to the cover plate assembly 100.

[0044] In an optional embodiment, if Figures 3 to 5 As shown, one of the first positioning portion 6 and the second positioning portion 7 is a plug-in convex portion, and the other of the first positioning portion 6 and the second positioning portion 7 is a plug-in groove. Exemplarily, the first positioning portion 6 is a plug-in groove, and the second positioning portion 7 is a plug-in convex portion, and the plug-in convex portion is plugged into the plug-in groove to achieve a quick-release connection between the first positioning portion 6 and the second positioning portion 7, facilitate the disassembly and assembly of the support plate 14 and the base plate 13, and improve welding efficiency.

[0045] In another optional embodiment, one of the first positioning portion 6 and the second positioning portion 7 is a magnet (not shown in the figure), and the other of the first positioning portion 6 and the second positioning portion 7 is a magnetic attraction member (not shown in the figure) that is magnetically attracted to the magnet. Optionally, the magnetic attraction member is a metal that can be magnetically attracted, such as iron, cobalt, nickel, etc. The magnetic attraction member can be adsorbed together with the magnet to achieve a quick-release connection between the first positioning portion 6 and the second positioning portion 7, facilitate the disassembly and assembly of the support plate 14 and the base plate 13, and improve welding efficiency.

[0046] In order to facilitate the installation of the support plate 14 on the base plate 13 or the removal of the support plate 14 from the base plate 13, it is optional, such as Figures 1 to 4 As shown, a handle 15 is also provided on the support plate 14 .

[0047] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying 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 of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0049] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0050] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A battery protective film welding device, characterized in that: include: A mounting seat, wherein the mounting seat is provided with a positioning groove, the positioning groove is used to accommodate the cover plate assembly and the protective film, and the cover plate assembly is adjacent to the bottom of the positioning groove; A pressing plate, the pressing plate is used to press the protective film against the welding surface of the cover plate assembly, the pressing plate is provided with a positioning opening, the positioning opening is used to expose the welding position of the protective film and the cover plate assembly; A welding body is installed on the mounting seat, and the welding body is directly opposite to the positioning opening. The welding body can pass through the positioning opening to weld the protective film and the cover plate assembly.

2. The battery protection film welding device according to claim 1, characterized in that: One of the mounting seat and the pressing plate is provided with a positioning slot, and the other of the mounting seat and the pressing plate is provided with an inserting portion, and the inserting portion is inserted into the positioning slot.

3. The battery protection film welding device according to claim 2, characterized in that: The mounting seat is further provided with two positioning plates, which are respectively located at opposite sides of the positioning groove, and the pressing plate is arranged between the two positioning plates, and the pressing plate is connected to the positioning plates via fasteners.

4. The battery protection film welding device according to any one of claims 1 to 3, characterized in that: The mounting seat includes a detachably connected base plate and a support plate, the welding body is mounted on the base plate, the support plate is provided with the positioning groove, the base plate is provided with a first positioning portion, the support plate is provided with a second positioning portion, the first positioning portion is connected to the second positioning portion so that the positioning opening is aligned with the welding head of the welding body.

5. The battery protection film welding device according to claim 4, characterized in that: The pressing plate is provided with a plurality of the positioning openings, the substrate is provided with a plurality of the first positioning portions at intervals, and the second positioning portion is connected to one of the first positioning portions so that one of the positioning openings is aligned with the welding head.

6. The battery protection film welding device according to claim 4, characterized in that: One of the first positioning portion and the second positioning portion is an inserting protrusion, and the other of the first positioning portion and the second positioning portion is an inserting groove, and the inserting protrusion is inserted into the inserting groove; Alternatively, one of the first positioning portion and the second positioning portion is a magnet, and the other of the first positioning portion and the second positioning portion is a magnetic attraction member that is magnetically attracted to the magnet.

7. The battery protection film welding device according to claim 4, characterized in that: A handle is provided on the support plate.

8. The battery protection film welding device according to any one of claims 1 to 3, characterized in that: The welding body comprises a welding head and a driving member, wherein the driving member is connected to the welding head, and the driving member can drive the welding head to move close to the positioning opening to press the protective film and weld it to the cover plate assembly; A buffer is also provided on the mounting seat. The buffer is located at the front side of the welding body along the moving direction of the welding head. The buffer can be connected to the welding body to buffer the pressing force of the welding head on the protective film.

9. The battery protection film welding device according to claim 8, characterized in that: A controller is also included, and the controller is connected to the welding body to control the welding time of the welding body.

10. The battery protection film welding device according to any one of claims 1 to 3, characterized in that: The groove bottom of the positioning groove and the pressing plate are both provided with avoidance structures.

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