Pressing nozzle and stitch welding pressing mechanism

Abstract

The pressing nozzle is used for pressing a nickel sheet, the pressing nozzle comprises a pressing needle and a pressing seat, the pressing needle is embedded in the pressing seat, a hole with a preset shape is formed in the pressing seat, the pressing needle comprises a needle head, a needle tube and a spring, one end of the needle head abuts against the nickel sheet, and the other end of the needle tube abuts against the nickel sheet. The other end of the needle head is connected with the spring, and the spring is arranged in the needle tube. The utility model further discloses a stitch welding pressing mechanism. According to the tool jig, the pressing nozzle is arranged, the pressing nozzle is convenient to manufacture and low in price, and the cost of the tool jig is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of battery laser stacking welding devices, in particular to a nozzle and a stacking welding pressing mechanism. Background Art

[0002] In the field of laser welding, usually according to different workpiece characteristics and structural characteristics, there are methods such as butt welding, fillet welding, stacking welding, lap welding, T-shaped welding, etc. The characteristic of laser welding is non-contact welding, which has high welding characteristics and economic applications. Among them, the stacking welding technology realizes the stacking of battery cells on the basis of the traditional solder tape welding process, reduces the distance between battery cells to maximize the utilization area, thereby realizing high energy density. The energy density of the component is one of the important indicators to measure the advancement of the manufacturing process.

[0003] For the existing working conditions of laser stacking welding, it is usually required to stack tightly to ensure good welding effects. Usually, a corresponding pressing head (or called nozzle) tooling needs to be made for laser stacking welding to press the workpiece to ensure the stacking welding effect. The production of the pressing head and the nozzle is necessary for the process characteristics, and the production materials are usually made of metal materials, high-temperature resistant hard materials, etc. The pressing head is usually designed into a plate structure according to the product structure characteristics, that is, a large pressing plate with pressing heads at multiple welding points configured thereon. In the design of the pressing head, considering the welding characteristics, the design of the shielding gas nozzle channel will also be carried out, and an elastic buffer is also set to avoid pressing the workpiece, and at the same time, blowing shielding gas is used to avoid abnormal welding points.

[0004] In the field of integrated busbars (CCS), between the electrode busbar (BUSBAR) and the signal acquisition board, the laser stacking welding process is also adopted. Due to product characteristics, the products are updated quickly, with high efficiency and short changeover time. Usually, the welding effect of CCS (CELLS CONTACTSYSTEM battery connection system, also called battery connection integrated busbar) is different from the requirements in other fields, and a complete stacking welding design requirement can be not adopted to design the tooling, but only focus on the pressing characteristics of laser stacking welding. The structure of the traditional tooling is complex. For example, it is necessary to process a tapered inclined plane by a numerical control machine tool (CNC), the inner and outer nozzles of the nozzle are in a nested structure, and each nozzle needs to be configured with multiple springs and guide columns, etc., which brings a high tooling cost for the batch production of CCS products. There is an urgent need for a solution to improve this state.

[0005] The above content is only used to assist in understanding the technical solution of the utility model, and does not represent an admission that the above content is prior art. Summary of the Utility Model

[0006] The main purpose of the utility model is to solve the technical problem of high tooling cost of traditional tooling.

[0007] In a first aspect, to achieve the above object, the present utility model provides a nozzle for pressing a nickel sheet. The nozzle includes a pressing needle and a pressing seat. The pressing needle is embedded in the pressing seat. The pressing seat is provided with a hole of a preset shape. The pressing needle includes a needle tip, a needle tube, and a spring. One end of the needle tip abuts against the nickel sheet, the other end of the needle tip is connected to the spring, and the spring is disposed in the needle tube.

[0008] In one embodiment, the preset shape is an I-shaped, and one pressing needle is disposed on each side of the I-shaped hole.

[0009] In one embodiment, the preset shape is a king-shaped, and two pressing needles are disposed on each side of the king-shaped hole.

[0010] In one embodiment, the nozzle further includes a cross bar, and the ends of the two pressing needles on each side close to the nickel sheet are connected by the cross bar.

[0011] In one embodiment, the needle tip is an L-shaped plate.

[0012] In one embodiment, the needle tip is a V-shaped plate, and a welding hole is provided in the middle of the needle tip.

[0013] In one embodiment, two pressing needles are provided on the pressing seat, and the two pressing needles share the same needle tip.

[0014] In one embodiment, a magnet is provided on a surface of the pressing seat away from the nickel sheet.

[0015] In one embodiment, a screw hole is provided on the pressing seat.

[0016] In a second aspect, the present utility model further provides a stacked welding pressing mechanism, characterized in that the stacked welding pressing mechanism includes a plurality of nozzles as described in any one of the first aspect.

[0017] In the present utility model, the nozzle is used for pressing a nickel sheet. The nozzle includes a pressing needle and a pressing seat. The pressing needle is embedded in the pressing seat. The pressing seat is provided with a hole of a preset shape. The pressing needle includes a needle tip, a needle tube, and a spring. One end of the needle tip abuts against the nickel sheet, the other end of the needle tip is connected to the spring, and the spring is disposed in the needle tube. By the above method, the present application provides a nozzle with a telescopic pressing needle to replace the original nozzle. This pressing needle is convenient to manufacture and low in cost, greatly reducing the cost of the tooling fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the attached drawings required for use in the embodiments. It should be understood that the following attached drawings only show some embodiments of the present utility model, and thus should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant attached drawings can also be obtained based on these attached drawings.

[0019] Figure 1 Structural schematic diagram of the pressure needle in an embodiment of the present utility model;

[0020] Figure 2 Structural schematic diagram of the pressure nozzle in an embodiment of the present utility model;

[0021] Figure 3 Structural schematic diagram of the pressure needle in an embodiment of the present utility model;

[0022] Figure 4 Structural schematic diagram of the pressure nozzle in an embodiment of the present utility model;

[0023] Figure 5 Structural schematic diagram of the pressure nozzle in an embodiment of the present utility model;

[0024] Figure 6 Structural schematic diagram of the pressure needle in an embodiment of the present utility model;

[0025] Figure 7 Structural schematic diagram of the installation of the stacked welding pressing mechanism in an embodiment of the present utility model;

[0026] Figure 8 Exploded structural schematic diagram of the installation of the stacked welding pressing device in an embodiment of the present utility model;

[0027] Figure 9 Structural schematic diagram of the pressure nozzle in an embodiment of the present utility model;

[0028] Figure 10 Structural schematic diagram of the pressure needle in an embodiment of the present utility model;

[0029] Main element symbol description:

[0030] 1 - Pressure seat; 2 - Pressure needle; 21 - Electrical measurement probe; 22 - Elastic positioning column; 23 - Needle tip; 3 - Hole with a preset shape; 31 - I-shaped hole; 32 - King-shaped hole; 4 - Magnet; 5 - Horizontal bar; 6 - Pressure nozzle; 7 - Pressure plate; 8 - Mounting plate; 9 - Bottom plate; 10 - Pressure nozzle for loading products; 11 - Washer; 12 - Pressure block. Specific implementation manners

[0031] To better understand the above technical solution, the exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0032] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] It should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the coordinate system shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, 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 should not be construed as a limitation to the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0036] The present invention provides a nozzle, referring to Figure 2, in one embodiment, the nozzle 6 includes a pressing needle 2 and a pressing seat 1. The pressing needle 2 is embedded in the pressing seat 1. A hole 3 with a preset shape is provided on the pressing seat 1. The pressing needle 2 includes a needle tip 23, a needle tube and a spring. One end of the needle tip 23 abuts against the nickel sheet, and the other end of the needle tip 23 is connected to the spring. The spring is arranged in the needle tube.

[0037] It should be understood that the nozzles in the prior art include an inner nozzle and an outer nozzle. A plurality of nozzles 6 are arranged on the bottom plate, and each nozzle is independently configured with 4 springs and guide posts, with a complex structure and occupying a large amount of space.

[0038] Among them, the direction of compression and rebound of the spring is the same as the direction of the needle tip. The compression of the spring provides pressure for the needle tip to press the nickel sheet. The structure of the pressing needle can refer to the electrical test probe 21 and the spring positioning pin, etc. The electrical test probe 21 and the spring positioning pin are prior arts, and are inexpensive and simple to manufacture.

[0039] In this embodiment, by using a retractable nozzle 6 to replace the original nozzle 6, the pressing needle 2 is convenient to manufacture and inexpensive, greatly reducing the cost of the tooling fixture. The retractable structure avoids leaving marks on the product by the nozzle 6. Due to the difference in the flatness of the installation of the tooling plate, rigid contact with the product is avoided, resulting in embossing.

[0040] In one of the embodiments, referring to Figure 1 and Figure 2 , the pressing needle 2 uses an electrical test probe 21 (standard test probe).

[0041] Among them, the standard test probe is commonly used in the field of electronic testing; the standard test probe includes a needle sleeve, and the spring needle can be replaced by directly pulling out the spring needle inside. Needles of different models can apply different pressures to the thin nickel sheet.

[0042] Specifically, the nozzle 6 is used for pressing the nickel sheet. The nozzle 6 includes a pressing needle 2 and a pressing seat 1. The pressing needle 2 is embedded in the pressing seat 1. A hole 3 with a preset shape is provided on the pressing seat 1. The pressing needle 2 uses a standard test probe, and one end of the probe abuts against the nickel sheet.

[0043] In this embodiment, by using a standard test probe to replace the original nozzle 6, it has the characteristics of quick purchase, economy, standardization, and unification, etc., which can bring lower application costs to the tooling design. At the same time, the standard test probe is also convenient to replace, enabling the nozzle 6 to adapt to nickel sheets of various sizes.

[0044] In one of the embodiments, referring to Figure 3 and Figure 4 , the pressing needle 2 is an elastic positioning post 22 (spring positioning pin).

[0045] Among them, in this embodiment, the model of the spring positioning pin is M6; in other embodiments, other models of spring positioning pins can also be selected; it should be understood that the pressure seat 1 is equipped with an M6 thread hole, and the M6 ​​spring positioning pin is installed by rotating and screwing in, and the needle 23 can be replaced by screwing in and out.

[0046] In this embodiment, a spring positioning pin is used to replace the original pressure nozzle 6, and the installation method of screwing in and out is more convenient and quick, and has the characteristics of quick purchase, economy, standardization, and unification, which can bring lower application cost for tooling design. At the same time, the spring positioning pin is also easy to replace, so that the pressure nozzle 6 can adapt to nickel sheets of various sizes.

[0047] In one embodiment, referring to Figure 2 and Figure 4 The preset shape is an I-shape, and one pressing needle 2 is respectively arranged on both sides of the I-shaped hole 31.

[0048] In this embodiment, the pressure needle 2 is arranged as follows: Figure 2 and Figure 4 In the positions shown, in other embodiments, it can also be set at different positions according to actual needs.

[0049] Specifically, the pressing nozzle 6 is used to press the nickel sheet, and the pressing nozzle 6 includes a pressing needle 2 and a pressing seat 1. The pressing needle 2 is embedded in the pressing seat 1, and a hole 3 of a preset shape is provided on the pressing seat 1. The pressing needle 2 includes a needle head 23, a needle tube and a spring. One end of the needle head 23 abuts against the nickel sheet, and the other end of the needle head 23 is connected to the spring. The spring is arranged in the needle tube. The preset shape is an I-shape, and a pressing needle 2 is respectively arranged on both sides of the I-shaped hole 31.

[0050] In this embodiment, an I-shaped hole 31 structure is provided on the pressure seat 1 to allow more light to penetrate into the visual positioning of laser welding, thereby avoiding failure of visual capture positioning and poor visual effect caused by small amount of light entering.

[0051] In one embodiment, referring to Figure 5 The preset shape is a W-shaped shape, and two pressing needles 2 are respectively arranged on both sides of the W-shaped hole 32.

[0052] In this embodiment, the pressure needle 2 is arranged as follows: Figure 5 In the positions shown, in other embodiments, it can also be set at different positions according to actual needs.

[0053] Specifically, the nozzle 6 is used for pressing the nickel sheet. The nozzle 6 includes a pressing needle 2 and a pressing seat 1. The pressing needle 2 is embedded in the pressing seat 1. A hole 3 with a preset shape is provided on the pressing seat 1. The pressing needle 2 includes a needle tip 23, a needle tube and a spring. One end of the needle tip 23 abuts against the nickel sheet, and the other end of the needle tip 23 is connected to the spring. The spring is arranged in the needle tube. The preset shape is in the shape of a Chinese character 'wang'. Two pressing needles 2 are respectively arranged on both sides of the hole 32 in the shape of a Chinese character 'wang'.

[0054] In this embodiment, by providing the hole 32 in the shape of a Chinese character 'wang', more light can penetrate for the visual positioning of laser welding, avoiding the failure of visual capture positioning and poor visual effects caused by small light input.

[0055] In one of the embodiments, referring to Figure 5 and Figure 6 , the nozzle 6 further includes a cross bar 5. One ends of the two pressing needles 2 on each side close to the nickel sheet are connected by the cross bar 5.

[0056] Among them, materials such as brass that are easy to solder can be used.

[0057] Specifically, the nozzle 6 is used for pressing the nickel sheet. The nozzle 6 includes a pressing needle 2 and a pressing seat 1. The pressing needle 2 is embedded in the pressing seat 1. A hole 3 with a preset shape is provided on the pressing seat 1. The pressing needle 2 includes a needle tip 23, a needle tube and a spring. One end of the needle tip 23 abuts against the nickel sheet, and the other end of the needle tip 23 is connected to the spring. The spring is arranged in the needle tube. The nozzle 6 further includes a cross bar 5. One ends of the two pressing needles 2 on each side close to the nickel sheet are connected by the cross bar 5.

[0058] In this embodiment, by providing the cross bar 5 to supplement the pressing of the pressing needle 2, since the cross bar directly contacts the nickel sheet, the boundary of the contact position with the nickel sheet is relatively clear, and it can be horizontally shifted left and right. A specific component is further added on the basis of the spring needle to solve specific visual capture problems. At the same time, the cross bar 5 is also a low-cost and effective device.

[0059] In one of the embodiments, a screw hole is provided on the pressing seat 1.

[0060] Among them, the screw hole can be provided at a position close to the edge of the pressing seat 1, or can be provided at any position that does not affect the overlapping welding of the pressing needle 2 and the nickel sheet.

[0061] Specifically, the nozzle 6 is used for pressing the nickel sheet. The nozzle 6 includes a pressing needle 2 and a pressing seat 1. The pressing needle 2 is embedded in the pressing seat 1. A hole 3 with a preset shape is provided on the pressing seat 1. The pressing needle 2 includes a needle tip 23, a needle tube, and a spring. One end of the needle tip 23 abuts against the nickel sheet, and the other end of the needle tip 23 is connected to the spring. The spring is arranged in the needle tube. A threaded hole is provided on the pressing seat 1.

[0062] In this embodiment, by providing the threaded hole, the nozzle 6 can be freely installed and disassembled.

[0063] In one of the embodiments, referring to Figure 2 and Figure 4 , a magnet 4 is provided on one side of the pressing seat 1 away from the nickel sheet.

[0064] Among them, as shown in Figure 2 and Figure 4 , the magnet 4 is arranged at the four corners of the pressing seat 1, and the magnet 4 is arranged on one side of the pressing seat 1 away from the nickel sheet. In other embodiments, the magnet 4 can be arranged at other positions on the pressing seat 1.

[0065] Specifically, the nozzle 6 is used for pressing the nickel sheet. The nozzle 6 includes a pressing needle 2 and a pressing seat 1. The pressing needle 2 is embedded in the pressing seat 1. A hole 3 with a preset shape is provided on the pressing seat 1. The pressing needle 2 includes a needle tip 23, a needle tube, and a spring. One end of the needle tip 23 abuts against the nickel sheet, and the other end of the needle tip 23 is connected to the spring. The spring is arranged in the needle tube. A magnet 4 is provided on one side of the pressing seat 1 away from the nickel sheet.

[0066] In this embodiment, by providing the magnet 4 on the pressing seat 1, it can be freely installed and disassembled, which is convenient for maintenance in case of abnormalities and for reusing this module. Subsequently, the overall design of the pressing plate 7 can be made simpler.

[0067] In one of the embodiments, referring to Figure 9 and Figure 10 , the needle tip 23 is an L-shaped plate.

[0068] Among them, the needle tip 23 can be set into various shapes according to requirements, and can also be set as an integral type or a split type. The L-shaped plate is a split type.

[0069] Specifically, the nozzle 6 is used for pressing the nickel sheet. The nozzle 6 includes a pressing needle 2 and a pressing seat 1. The pressing needle 2 is embedded in the pressing seat 1. A hole 3 with a preset shape is provided on the pressing seat 1. The pressing needle 2 includes a needle tip 23, a needle tube, and a spring. One end of the needle tip 23 abuts against the nickel sheet, and the other end of the needle tip 23 is connected to the spring. The spring is arranged in the needle tube. The needle tip 23 is an L-shaped plate.

[0070] In this embodiment, by setting the needle 23 as an L-shaped plate, the application mode of this structure is expanded, enabling the nozzle 6 to adapt to various structural changes.

[0071] In one embodiment, the needle 23 is a V-shaped plate, and a welding hole is provided in the middle of the needle 23.

[0072] Among them, the V-shaped plate needle 23 can be regarded as two L-shaped plate needles 23 connected, and the welding hole is located at the connection.

[0073] Specifically, the nozzle 6 is used for pressing the nickel sheet. The nozzle 6 includes a pressing needle 2 and a pressing seat 1. The pressing needle 2 is embedded in the pressing seat 1. A hole 3 with a preset shape is provided on the pressing seat 1. The pressing needle 2 includes a needle head 23, a needle tube and a spring. One end of the needle head 23 abuts against the nickel sheet, and the other end of the needle head 23 is connected to the spring. The spring is arranged in the needle tube. The needle head 23 is a V-shaped plate, and a welding hole is provided in the middle of the needle head 23.

[0074] In one embodiment, referring to Figure 9 and Figure 10 , the pressing needles 2 on the pressing seat 1 are arranged in pairs. The pressing needles 2 are installed on the pressing seat 1 through pressing blocks 12. The pressing blocks 12 are connected and fixed to the pressing seat 1 by screws. The pressing needle 2 includes a spring positioning pin and an L-shaped plate needle head 23. In this embodiment, each needle head 23 is fixed to the pressing block 12 by two of the spring positioning pins. In other embodiments, each needle head 23 can also be fixed to the pressing block 12 by three of the spring positioning pins according to requirements, and the number is not limited.

[0075] The present utility model provides a stacked welding and pressing mechanism. Referring to Figure 7 and Figure 8 , the stacked welding and pressing mechanism includes a plurality of nozzles 6, and the nozzle 6 is as described in any one of its aspects.

[0076] Among them, the plurality of nozzles 6 are installed on a pressing plate 7, and the pressing plate 7 is installed on a stacked welding machine through a mounting plate 8.

[0077] Specifically, the nozzle 6 is used for pressing the nickel sheet. The nozzle 6 includes a pressing needle 2 and a pressing seat 1. The pressing needle 2 is embedded in the pressing seat 1. A hole 3 with a preset shape is provided on the pressing seat 1. The pressing needle 2 includes a needle head 23, a needle tube and a spring. One end of the needle head 23 abuts against the nickel sheet, and the other end of the needle head 23 is connected to the spring. The spring is arranged in the needle tube.

[0078] In this embodiment, by providing a plurality of nozzle 6 as described in any one of the first aspects on the stacked welding pressing mechanism, the complexity of the tooling design is effectively reduced, the overall cost of the laser stacked welding device is reduced, and the maintenance cost is further reduced.

[0079] In one of the embodiments, the utility model provides a stacked welding pressing mechanism, the stacked welding pressing mechanism includes a slide bar and a nozzle 6, the nozzle 6 is slidably connected to the slide bar, and the pressing pin 2 is connected to the pressing seat 1 through three spring positioning columns.

[0080] Among them, for structural stability, the installation method of the nozzle 6 can be selected as parallel double rows, three in a triangular pattern, four in a square pattern, etc.

[0081] In this embodiment, for an integrated busbar with regularly distributed solder joints, after adjusting the position of the nozzle 6, it is more convenient to adapt to different models of products, so as to achieve the versatility of the tooling.

[0082] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A pressure nozzle, characterized in that: The nozzle is used for pressing the nickel sheet. The nozzle includes a pressing needle and a pressing seat. The pressing needle is embedded in the pressing seat. A hole with a preset shape is provided on the pressing seat. The pressing needle includes a needle tip, a needle tube and a spring. One end of the needle tip abuts against the nickel sheet, and the other end of the needle tip is connected to the spring. The spring is arranged in the needle tube.

2. The pressure nozzle according to claim 1, characterized in that The preset shape is in the shape of a Chinese character '工' (工字). One pressing needle is provided on each side of the hole in the shape of a Chinese character '工' (工字).

3. The pressure nozzle according to claim 1, characterized in that: The preset shape is in the shape of a Chinese character '王' (王字). Two pressing needles are provided on each side of the hole in the shape of a Chinese character '王' (王字).

4. The pressure nozzle according to claim 3, characterized in that: The nozzle further includes a cross bar. The ends of the two pressing needles on each side close to the nickel sheet are connected by the cross bar.

5. The pressure nozzle according to claim 1, characterized in that: The needle tip is in the shape of an L-shaped plate.

6. The pressure nozzle according to claim 1, characterized in that: The needle tip is in the shape of a V-shaped plate, and a welding hole is provided in the middle of the needle tip.

7. The pressure nozzle according to claim 6, characterized in that Two pressing needles are provided on the pressing seat, and the two pressing needles share the same needle tip.

8. The pressure nozzle according to claim 1, characterized in that A magnet is provided on the side of the pressing seat away from the nickel sheet.

9. The press nozzle according to claim 1, characterized in that: A screw hole is provided on the pressing seat.

10. A stitch welding clamping mechanism, characterized in that: The stacked welding and pressing mechanism includes a plurality of nozzles as described in any one of claims 1-9.

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