Welding device
By designing a welding device with clearance grooves and notches, the problem of limited welding space between the electrode tab and the electrode post was solved, the welding quality was improved and the insulating parts were protected, achieving a stable and efficient welding effect.
Patent Information
- Application Number
- CN202520152906.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-22
AI Technical Summary
During the welding process of the battery cover and the cell, the welding space between the tab and the terminal is limited, which may cause the welding to be offset onto the insulation, damaging the insulation and affecting the welding quality.
Design a welding device including a first welding head and a second welding head arranged opposite each other, with a clearance groove and a notch to avoid insulating components, ensuring that the welding surface only contacts the electrode tab and the electrode post, and avoiding interference from the insulating components.
It improves the welding quality of the tabs and posts, prevents damage to insulation components, enhances the stability and repeatability of the welding process, and extends the life of the welding head.
Smart Images
Figure CN223801741U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery manufacturing technology, and in particular to a welding apparatus. Background Technology
[0002] Battery covers are typically made of metal. To prevent short circuits between the battery cover and the battery cells, an insulating component is attached to the side of the battery cover facing the battery cells. During battery assembly, the welding of the tabs to the terminals is a crucial step in connecting the battery output to the external circuitry. The terminals are usually located on the battery cover, and the insulating component has through holes for the terminals to pass through. The tabs are part of the battery cell. When welding the terminals to the tabs, because the distance between the terminals and the insulating component is very short, the welding space is limited, or the welding head is not accurately positioned, the welding may shift onto the insulating component, causing damage to the insulating component and affecting the welding quality of the tabs and terminals. Utility Model Content
[0003] This application discloses a welding device for improving the welding quality of the tabs and posts, and avoiding any impact on the insulating components.
[0004] To achieve the above objectives, this application provides the following technical solution:
[0005] In a first aspect, this application provides a welding apparatus, which includes a first welding head and a second welding head disposed opposite to each other; the surface of the first welding head facing the second welding head is provided with a first notch and a second notch to form a first welding surface, the first notch and the second notch are spaced apart along a first direction, and the first notch and the second notch are used to avoid an insulating component; the surface of the second welding head facing the first welding head is provided with a first avoidance groove and a second avoidance groove, the first avoidance groove and the second avoidance groove are spaced apart along a second direction, and the first avoidance groove and the second avoidance groove are used to accommodate an insulating component; wherein, the first direction and the second direction are perpendicular to each other.
[0006] When the welding device is working, the workpieces to be welded, such as tabs and poles, are stacked between the first welding head and the second welding head. The tabs are in direct contact with the first welding head, and the poles are in direct contact with the second welding head. The insulating component is located in the first clearance groove and the second clearance groove, and the first notch and the second notch can avoid the insulating component so that the first welding surface matches the welding area of the tab. This avoids the insulating component interfering with the welding process of the tab and pole, which can improve the welding quality and prevent the high temperature during the welding process from damaging the insulating component. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of the structure of a welding apparatus according to an embodiment of this application;
[0008] Figure 2 for Figure 1 A magnified view of a portion at point A shown in the image;
[0009] Figure 3 This is a schematic diagram of the structure of a first welding head according to an embodiment of this application;
[0010] Figure 4 This is a schematic diagram of the structure of a first welding head according to an embodiment of this application;
[0011] Figure 5 This is a schematic diagram of the structure of the second welding head according to one embodiment of this application;
[0012] Figure 6 This is a top view of the second welding head according to an embodiment of this application.
[0013] Reference numerals: 100-First welding head; 110-First welding surface; 111-First arc-shaped edge; 112-First straight edge; 113-Second arc-shaped edge; 114-Second straight edge; 101-First part; 110-Second part; 200-Second welding head; 210-Protruding structure; 211-Second welding surface; 220-First protrusion; 221-First chamfer; 230-Second protrusion; 231-Second chamfer; 300-Mounting base; 400-Bracket; 500-Upper slide; 600-Drive mechanism;
[0014] 01-First gap; 02-Second gap; 03-First clearance groove; 04-Second clearance groove; 05-First clearance opening; 06-Second clearance opening. Detailed Implementation
[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0016] During the welding process between the battery terminals and tabs, due to the limited welding space, if the welding head is not positioned accurately, the welding may shift onto the insulating parts of the battery cover, causing damage to the insulating parts and affecting the welding quality of the tabs and terminals.
[0017] In view of this, this application provides a welding apparatus. Figure 1 This is a schematic diagram of the structure of a welding apparatus according to an embodiment of this application. Figure 2 for Figure 1 A magnified view of a portion at point A shown in the image. Figure 3 This is a schematic diagram of the structure of the first welding head according to an embodiment of this application. Please refer to it as well. Figures 1 to 3The welding device comprises a support 400 and an upper sliding table 500 in sliding connection with the support 400, the upper sliding table 500 is provided with a first welding head 100, the support 400 is provided with a second welding head 200, the first welding head 100 and the second welding head 200 are oppositely arranged and can move under the driving of the upper sliding table 500. Wherein, the welded object is placed on the surface of the second welding head 200, the first welding head 100 moves towards the direction close to the welded object, then the first welding head 100 contacts the welded object and applies pressure, when the pressure reaches a preset value, the welding is started, and after the welding is completed, the original position is returned.
[0018] In an optional solution of the embodiment, the welding device further comprises a driving mechanism 600 for driving the upper sliding table 500 to move. The driving mechanism 600 can be a motor or a pneumatic cylinder.
[0019] In an optional solution of the embodiment, the welding device further comprises a mounting seat 300, the mounting seat 300 is detachably connected with the second welding head 200 to realize quick replacement of the second welding head 200. Wherein, the mounting seat 300 and the second welding head 200 can be connected through clamping, screwing, riveting and the like.
[0020] Wherein, the welded object is the contact surface of at least two metal components, for example, the welded object can be the pole and the tab of a battery, and the following will be described by taking the pole and the tab as the welded object.
[0021] Continuing to refer to Figures 1 to 3 , the surface of the first welding head 100 facing the second welding head 200 is provided with a first notch 01 and a second notch 02 to form a first welding surface 110, the first notch 01 and the second notch 02 are arranged in a first direction D1. The first notch 01 and the second notch 02 are used to avoid the insulation piece, so that the first welding surface 110 is only in direct contact with the tab, and damage to the insulation piece is reduced or avoided.
[0022] Wherein, the specific shape and size of the first welding head 100 are not limited in the present application, and the shape and size need to be designed according to the shape and size of the welded head. For example, the shape of the first welding head 100 can be cylindrical, conical, quadrangular prism or other shapes.
[0023] In an optional solution of the embodiment, the shape of the first welding head 100 can be understood as a cylinder obtained by arranging a notch at both ends of a cylindrical welding head in the first direction D1.
[0024] As shown in Figure 3 , the first welding surface 110 is a center-symmetric figure formed by a first arc-shaped side 111, a first straight side 112, a second arc-shaped side 113 and a second straight side 114 connected in sequence.
[0025] Figure 4FIG. 1 is a structural schematic diagram of a first welding head according to an embodiment of the present application; Figure 3 and Figure 4 In the movement direction of the first welding head 100, the first welding head 100 comprises a first part 101 and a second part 102 connected with the first part 101, the diameter of the first part 101 is smaller than that of the second part 102, the first part 101 directly contacts the object to be welded, and the first gap 01 and the second gap 02 are arranged on the first part 101.
[0026] In an optional solution of the embodiment, the second part 102 is provided with a first avoiding gap 05 and a second avoiding gap 06, and the first avoiding gap 05 and the second avoiding gap 06 are arranged at intervals along the first direction D1. The first avoiding gap 05 and the second avoiding gap 06 are used to avoid interference with the tab protection cover.
[0027] It can be understood that the shape and size of the first avoiding gap 05 and the second avoiding gap 06 need to be designed according to the shape and size of the tab protection cover. For example, the first avoiding gap 05 and the second avoiding gap 06 can both be arc-shaped gaps.
[0028] Figure 5 FIG. 2 is a structural schematic diagram of a second welding head according to an embodiment of the present application; Figure 6 FIG. 3 is a top view of the second welding head according to an embodiment of the present application; Figure 5 and Figure 6 The surface of the second welding head 200 facing the object to be welded is provided with a first avoiding groove 03 and a second avoiding groove 04, and the first avoiding groove 03 and the second avoiding groove 04 are arranged at intervals along the second direction D2. The first avoiding groove 03 and the second avoiding groove 04 are used to accommodate the insulating part of the battery cover plate. The first direction D1 and the second direction D2 are perpendicular to each other.
[0029] In an optional solution of the embodiment, the second welding head 200 comprises a protruding structure 210 between the first avoiding groove 03 and the second avoiding groove 04, and the surface of the protruding structure 210 facing the object to be welded is a second welding surface 211. The second welding surface 211 is used to directly contact the object to be welded.
[0030] It can be understood that the shape and size of the second welding surface 211 need to match the welding area of the object to be welded to improve the welding quality.
[0031] In the present application, the shape of the second welding surface 211 is not limited, for example, the shape of the second welding surface 211 can be rectangular, octagonal or other shapes.
[0032] In an optional solution of the embodiment, along the second direction D2, the second welding head 200 comprises a first protruding part 220 and a second protruding part 230 arranged oppositely, a first avoiding slot 03 between the first protruding part 220 and the protruding structure 210, and a second avoiding slot 04 between the second protruding part 230 and the protruding structure.
[0033] In an optional solution of the embodiment, along the first direction D1, an end of the first protruding part 220 close to the protruding structure 210 is provided with a first chamfer 221, so that the first protruding part 220 is away from the insulating part of the battery cover plate, preventing the insulating part from being scalded.
[0034] In an optional solution of the embodiment, along the first direction D1, an end of the second protruding part 230 close to the protruding structure 210 is provided with a second chamfer 231, so that the second protruding part 230 is away from the insulating part of the battery cover plate, preventing the insulating part from being scalded.
[0035] In an optional solution of the embodiment, the welding device is a pressure melting welding device.
[0036] In an optional solution of the embodiment, the melting point of the first welding head 100 and the second welding head 200 is greater than or equal to 1000℃. High melting point can withstand higher welding temperature, thereby improving welding efficiency and shortening welding period. In addition, high melting point helps to maintain stability and repeatability during welding process, thereby ensuring welding quality.
[0037] In an optional solution of the embodiment, the thermal conductivity of the first welding head 100 and the second welding head 200 is greater than or equal to 80W / (m·K). The welding head material with appropriate thermal conductivity can reduce the wear and oxidation of the welding head, thereby prolonging the service life of the welding head.
[0038] Specifically, the preparation material of the first welding head 100 and the second welding head 200 can be selected from the materials listed in Table 1 below.
[0039] Table 1
[0040]
[0041]
[0042] In an optional solution of the embodiment, the preparation materials of the first welding head 100 and the second welding head 200 are different.
[0043] The preparation materials of the first welding head 100 and the second welding head 200 are described taking the first welding head 100 directly contacting the tab and the second welding head 200 directly contacting the post as examples.
[0044] In an optional solution of the embodiment, the first welding head 100 is made of tungsten, iron, chromium, nickel, molybdenum, tungsten-molybdenum alloy, tungsten-copper alloy, molybdenum-copper alloy. The second welding head 200 is made of copper, chromium-zirconium-copper, aluminum oxide-copper, beryllium-copper, red copper.
[0045] Of course, the second welding head 200 can also directly contact the pole. Correspondingly, the first welding head 100 is made of copper, chromium-zirconium-copper, aluminum oxide-copper, beryllium-copper, red copper. The second welding head 200 is made of tungsten, iron, chromium, nickel, molybdenum, tungsten-molybdenum alloy, tungsten-copper alloy, molybdenum-copper alloy.
[0046] The structure and material of the first welding head 100 and the second welding head 200 are described above. The working process of the welding device in the application will be described below.
[0047] The workpieces, such as the pole and the tab, are placed in a stack between the first welding head 100 and the second welding head 200. The tab and the pole are stacked to prevent the pole from directly contacting the second welding head 200 on the surface of the second welding head 200.
[0048] The first welding head 100 moves towards the tab, and then the first welding head 100 directly contacts the tab and applies pressure. When the pressure reaches a preset value, the welding is started. The insulating piece is located in the first avoiding groove 03 and the second avoiding groove 04, and the first gap 01 and the second gap 02 can avoid the insulating piece, so that the first welding surface 110 matches the welding area of the tab, thereby avoiding the interference of the insulating piece with the welding process of the tab and the pole, which can improve the welding quality and prevent the high temperature in the welding process from damaging the insulating piece.
[0049] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application fall within the scope of the claims of the application and their equivalent technologies, the application also intends to include these modifications and variations.
Claims
1. A welding device, characterized in that, The first welding head and the second welding head are oppositely arranged; A surface of the first welding head facing the second welding head is provided with a first notch and a second notch to form a first welding surface, the first notch and the second notch are arranged along a first direction, and the first notch and the second notch are used to avoid the insulation piece; A surface of the second welding head facing the first welding head is provided with a first avoiding groove and a second avoiding groove, the first avoiding groove and the second avoiding groove are arranged along a second direction, and the first avoiding groove and the second avoiding groove are used to accommodate the insulation piece; The first direction and the second direction are perpendicular to each other.
2. The welding device of claim 1, wherein, The first welding surface is a center-symmetrical figure formed by a first arc-shaped edge, a first straight edge, a second arc-shaped edge and a second straight edge connected in sequence.
3. The welding device of claim 1, wherein, The second welding head includes a protruding structure between the first avoiding groove and the second avoiding groove, and a surface of the protruding structure facing the first welding head is a second welding surface.
4. The welding device of claim 3, wherein, The second welding surface is in the shape of a rectangle.
5. The welding device of claim 3, wherein, Along the second direction, the second welding head includes a first protruding part and a second protruding part arranged oppositely, the first avoiding groove is between the first protruding part and the protruding structure, and the second avoiding groove is between the second protruding part and the protruding structure.
6. The welding device of claim 5, wherein, Along the first direction, an end of the first protruding part close to the protruding structure is provided with a first chamfer; and / or, along the first direction, an end of the second protruding part close to the protruding structure is provided with a second chamfer.
7. The welding device according to any of claims 1-6, characterized in that The melting point of the first welding head and the second welding head is greater than or equal to 1000℃, and the thermal conductivity of the first welding head and the second welding head is greater than or equal to 80W / (m·K).
8. The welding device of claim 7, wherein, The preparation material of the first welding head is selected from tungsten, iron, chromium, nickel, molybdenum, tungsten-molybdenum alloy, tungsten-copper alloy, molybdenum-copper alloy, and the preparation material of the second welding head is selected from copper, chromium-zirconium-copper, aluminum oxide-copper, beryllium-copper and red copper.
9. The welding device of claim 8, wherein, The preparation materials of the first welding head and the second welding head are different.
10. The welding device of claim 9, wherein, The welding device further includes a mounting seat, and the mounting seat is detachably connected with the second welding head; And / or, the welding device is a pressure fusion welding device.