Sealing nail welding tool

Abstract

The utility model relates to the technical field of battery production equipment, in particular to a sealing nail welding tool which comprises a rack, a bearing assembly and a pressing assembly, and the bearing assembly is arranged on the rack and used for bearing a battery and enabling the battery to rotate around a first axis; the pressing and abutting assembly is arranged on the rack and can abut against the sealing nail in the process that the battery rotates around the first axis. The pressing and abutting assembly abuts against the sealing nail so that the sealing nail can be pressed and positioned at the liquid injection opening of the battery, and meanwhile the battery can keep rotating around the first axis, so that in the rotating process of the battery, the matching position of the sealing nail and the liquid injection opening is completely welded to achieve sealing. By means of the sealing nail welding tool, on the premise that the welding effect is not affected, the pre-spot welding process is omitted, and complete welding of the matching position of the sealing nail and the liquid injection opening is directly conducted.

Description

Technical Field

[0001] The present application relates to the technical field of battery production equipment, and in particular to a sealing nail welding tool. Background Art

[0002] In the production process of cylindrical lithium-ion batteries, most battery manufacturers will involve the sealing pin welding process for the injection port, which usually includes two processes: pre-spot welding and full welding. Among them, pre-spot welding refers to the sealing pin placed at the injection port. When the tooling is positioned and pressed, the laser is used to spot weld the mating parts to preliminarily fix the position of the sealing pin (the number of welding points is generally 3-6); full welding is based on pre-spot welding, and the sealing pin and the injection port are completely welded to achieve the effect of sealing. The pre-spot welding process can ensure that the sealing pin does not need to be pressed and positioned again during the full welding stage, so that when only the battery simplified mechanism needs to be positioned, it will not affect the laser light output.

[0003] At present, although the sealing nail welding process of pre-spot welding followed by full welding is mature and applied, its increased development cost, such as additional tooling parts, additional laser systems, etc. (especially high-speed mass production lines), exceeds the equipment cost of direct sealing full welding process by twice. Therefore, the development of welding tooling corresponding to the single-stage full welding process for sealing nail welding is particularly important. Utility Model Content

[0004] The present application provides a sealing nail welding tool, which is used to solve the problem of high cost of full welding after pre-spot welding of the sealing nail welding device in the prior art.

[0005] In one aspect, the present application provides a sealing nail welding tool, comprising:

[0006] frame;

[0007] A bearing assembly, disposed on the frame, for bearing the battery and causing the battery to rotate around a first axis;

[0008] The pressing component is arranged on the frame, and can press against the sealing nail when the battery rotates around the first axis.

[0009] In one possible design, the pressing component includes:

[0010] A pressing plate, arranged on the frame;

[0011] The pressing piece is arranged on the pressing plate and can rotate around the first axis to abut against the sealing pin.

[0012] In a possible design, the pressure piece is a spherical ball.

[0013] In a possible design, the pressure-resisting assembly also includes a mounting block, which is arranged on the pressure plate. A mounting hole is opened on the mounting block, and the inner hole diameter of the mounting hole gradually decreases near one end of the bearing assembly. The spherical ball is arranged in the mounting hole near one end of the bearing assembly and a part of the spherical surface protrudes out of the mounting hole.

[0014] In a possible design, the pressing assembly further includes a top screw, which is arranged at one end of the mounting hole away from the bearing assembly, and the end of the top screw abuts against the spherical ball.

[0015] In a possible design, the pressing assembly further includes a guide ring, which is arranged on a side of the pressing plate close to the bearing assembly, and the pressing piece is located in the guide ring.

[0016] In one possible design, the inner edge of the guide ring has a chamfer;

[0017] And / or, a laser incident hole is provided in the corresponding guide ring on the pressing plate.

[0018] In a possible design, the bearing component can move closer to or farther away from the pressing component along the first axis.

[0019] In one possible design, the load-bearing assembly includes:

[0020] A lifting seat, capable of approaching or moving away from the pressing assembly along the first axis;

[0021] The rotating seat is arranged on the lifting seat and can rotate around the first axis to carry the battery.

[0022] In a possible design, the edge of the rotating seat has an annular ridge.

[0023] The beneficial effects of this application are as follows:

[0024] The sealing nail welding tool of the present application, by providing a bearing assembly and a pressing assembly, allows the battery to rotate around the first axis driven by the bearing assembly, and the pressing assembly can press against the sealing nail at the liquid injection port at the end of the battery, so that the sealing nail is pressed and positioned at the liquid injection port of the battery, and at the same time, the battery can be kept rotating around the first axis, so that during the battery rotation process, the sealing nail and the liquid injection port are completely welded to achieve sealing. Therefore, the sealing nail welding tool of the present application can cancel the pre-spot welding process without affecting the welding effect, and directly perform complete welding at the sealing nail and the liquid injection port, thereby reducing welding costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic structural diagram of a sealing nail welding tool provided in one embodiment of the present application from one perspective;

[0027] Figure 2 A schematic structural diagram of a sealing nail welding tool provided by an embodiment of the present application from another perspective;

[0028] Figure 3 A structural schematic diagram of a sealing nail welding tool provided in an embodiment of the present application from another perspective;

[0029] Figure 4 A structural schematic diagram of a sealing nail welding tool provided in one embodiment of the present application from another perspective;

[0030] Figure 5 A schematic structural diagram of a pressing assembly of a sealing nail welding tool provided in one embodiment of the present application;

[0031] Figure 6 A schematic structural diagram of a pressing assembly of a sealing nail welding tool provided in one embodiment of the present application from another perspective;

[0032] Reference numerals:

[0033] 100-frame, 110-bottom plate, 120-top plate, 130-support plate;

[0034] 200-bearing assembly, 210-lifting seat, 220-rotating seat, 230-first drive, 240-guide rail, 250-motor, 260-coupling;

[0035] 300-pressing assembly, 310-pressing plate, 311-laser incident hole, 320-pressing piece, 330-mounting block, 340-top screw, 350-guide ring;

[0036] 400-Battery. DETAILED DESCRIPTION

[0037] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0038] In the production process of cylindrical lithium-ion batteries, the sealing pin welding at the filling port is currently mainly carried out by pre-spot welding followed by full welding. The equipment cost is twice as much as the equipment cost of direct sealing full welding.

[0039] To solve the above technical problems, the following Figure 1-Figure 6 , describes the sealing nail welding tool provided in the embodiment of the present application, through which the sealing nail at the injection port of the cylindrical lithium-ion battery can be directly sealed and fully welded, eliminating the original pre-spot welding. The sealing nail welding tool includes a frame 100, a bearing assembly 200 and a pressing assembly 300. The bearing assembly 200 is arranged on the frame 100, and the bearing assembly is used to carry the battery 400 and rotate the battery around the first axis; the pressing assembly 300 is arranged on the frame 100, and the pressing assembly 300 can be pressed against the sealing nail during the rotation of the battery around the first axis. It should be noted that the first axis coincides with the central axis of the battery, and the sealing nail is a component for sealing the injection port of the cylindrical lithium-ion battery, and the sealing nail is located at the center of one end face of the battery. In this way, during the rotation of the battery around the first axis, the sealing nail also rotates around the first axis to ensure that the pressing assembly 300 can keep against the sealing nail during the rotation of the battery around the first axis.

[0040] By using the technical solution of the above embodiment, by setting the bearing assembly 200 and the pressing assembly 300, the battery 400 can be driven by the bearing assembly 200 to rotate around the first axis, and the pressing assembly 300 can be pressed against the sealing nail at the liquid injection port at the end of the battery, so that the sealing nail is pressed and positioned at the liquid injection port of the battery, and at the same time, the battery can be kept rotating around the first axis. In this way, during the rotation of the battery, the sealing nail and the liquid injection port are completely welded to achieve sealing. Therefore, the sealing nail welding tool of the present application can cancel the pre-spot welding process without affecting the welding effect, and directly perform complete welding of the sealing nail and the liquid injection port, thereby reducing welding costs.

[0041] In some specific embodiments, the frame 100 includes a bottom plate 110, a top plate 120 and a support plate 130, wherein the upper end of the support plate 130 is connected to the top plate 120, and the lower end of the support plate 130 is connected to the bottom plate 110. The bearing assembly 200 is mounted on one side of the support plate 130, and the pressing assembly 300 is mounted on the top plate 120, so that the pressing assembly 300 is located on the bearing assembly 200. In this way, when the battery is placed on the bearing assembly 200, the sealing pin on the upper end surface of the battery is just opposite to the pressing assembly 300 to ensure that the pressing assembly 300 can press the sealing pin. After the battery is placed on the bearing assembly 200, the pressing assembly 300 is moved toward the bearing assembly 200 by a preset distance or the bearing assembly 200 is moved toward the pressing assembly 300 by a preset distance, so that the pressing assembly 300 can press the sealing pin.

[0042] Reference Figure 1 , Figure 5 As shown, in some embodiments of the present application, the pressing assembly 300 includes a pressing plate 310 and a pressing piece 320, wherein the pressing plate 310 is disposed on the frame 100; the pressing piece 320 is disposed on the pressing plate 310, and the pressing piece 320 can rotate around the first axis, and the pressing piece 320 is used to abut against the sealing nail. In this way, when the pressing piece 320 abuts against the sealing nail, the battery, the sealing nail and the pressing piece 320 can all rotate around the first axis, and at the same time, the pressing piece 320 and the sealing nail can always maintain a mutual abutment force, thereby maintaining the press-fitting position of the sealing nail on the battery.

[0043] In some embodiments, the pressing member 320 may be a rotating shaft, the axis of which coincides with the first axis, one end of which is connected to the pressing plate 310 via a bearing, and the other end of which is used to abut against the sealing pin. In this way, when one end of the rotating shaft abuts against the sealing pin, the battery, the sealing pin and the rotating shaft can all rotate around the first axis, that is, the battery can continue to rotate, so that during the rotation of the battery, the sealing pin and the injection port are completely welded to achieve sealing.

[0044] Reference Figure 5As shown, in some embodiments of the present application, in some of the embodiments, the pressing piece 320 is a spherical ball. The outer wall of the spherical ball is used to abut against the sealing nail. To ensure the abutting pressure, the spherical ball is made of a high-strength and hardness alloy, for example, the spherical ball is made of tungsten steel. To ensure the rotation effect, the surface roughness of the spherical ball is Ra<0.8. Optionally, a connecting shaft is rotatably installed inside the spherical ball, and the spherical ball can be installed on the pressure plate 310 through the connecting shaft, and the axis of the connecting shaft coincides with the first axis. In this way, when the outer wall of the spherical ball abuts against the sealing nail, the battery, the sealing nail and the spherical ball can all rotate around the first axis, that is, the battery can continue to rotate, so as to achieve the complete welding of the sealing nail and the injection port during the rotation of the battery to achieve sealing. In some embodiments, a plane is provided on the outer wall of the spherical ball, and the plane is used to abut against the sealing nail, so that the stability of contact with the sealing nail can be improved by setting the plane.

[0045] Reference Figure 1 , Figure 5 As shown, in some embodiments of the present application, the pressing assembly 300 further includes a mounting block 330, which is disposed on the pressing plate 310, and a mounting hole is provided on the mounting block 330, and the inner hole diameter of the mounting hole close to the end of the bearing assembly 200 gradually decreases, and the spherical ball is disposed in the mounting hole close to the end of the bearing assembly 200 and a part of the spherical surface protrudes from the mounting hole. In some embodiments, the mounting block 330 is mounted on the lower end surface of the pressing plate 310 by screws, and the inner hole diameter of the lower end of the mounting hole gradually decreases, so that the inner wall of the mounting hole close to the lower end forms a conical surface or a spherical surface, and the diameter of the spherical ball is larger than the diameter of the lowest end of the mounting hole, so that the spherical ball can be stuck in the mounting hole, and a part of the spherical surface of the spherical ball protrudes from the mounting hole, wherein the lowest end of the spherical ball protruding from the mounting hole is used to resist the sealing nail. In this way, by installing the spherical ball in the mounting hole, the number of mounting components can be reduced, and the friction resistance can be reduced at the same time.

[0046] Reference Figure 1 , Figure 5 As shown, in some embodiments of the present application, the pressing assembly 300 also includes a top screw 340, which is arranged at one end of the mounting hole away from the bearing assembly 200, and the end of the top screw 340 is pressed against the spherical ball. In some embodiments, the mounting hole is a through hole that passes through the mounting block 330, and the upper section of the mounting hole is an internal threaded hole for threaded connection with the top screw 340; the lower section of the mounting hole is not provided with an internal thread so that the spherical ball can rotate along the inner wall of the mounting hole. In this way, when installing, the spherical ball is first slid from the upper end of the mounting hole to the lower end, and then the top screw 340 is screwed into the mounting hole until the lower end of the top screw 340 is pressed against the spherical ball, completing the installation of the ball on the mounting block 330. Then the mounting block 330 is installed as a whole on the pressure plate 310. This design can simplify the installation steps.

[0047] Reference Figure 1 , Figure 2 As shown, in some embodiments of the present application, the pressing assembly 300 further includes a guide ring 350, which is disposed on a side of the pressing plate 310 close to the bearing assembly 200, and the pressing piece 320 is located in the guide ring 350. It should be noted that the inner side wall of the guide ring 350 is clearance-matched with the outer side wall of the battery, and the battery on the bearing assembly 200 can be limited in the guide ring 350. By providing the guide ring 350, the battery on the bearing assembly 200 can be limited, preventing the sealing pin from being separated from the pressing piece 320 due to shaking during the rotation of the battery.

[0048] In some embodiments of the present application, the inner side edge of the guide ring 350 has a chamfer. By providing the chamfer on the inner side edge of the guide ring 350 , it is convenient for the battery to enter the guide ring 350 .

[0049] Reference Figure 4 As shown, in some embodiments of the present application, a laser incident hole 311 is provided on the pressing plate 310 corresponding to the guide ring 350. By aligning the opening area of ​​the laser incident hole 311 with the inside of the guide ring 350, the area where the sealing pin needs to be welded can be accurately aligned, and the welding device performs full welding around the sealing pin through the laser incident hole 311. A shielding gas channel is also provided on the pressing plate 310, and one end of the shielding gas channel is connected to the laser incident hole 311. During welding, the shielding gas is spread over the welding area in the laser incident hole 311 through the shielding gas channel to ensure the welding effect.

[0050] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, in some embodiments of the present application, the bearing assembly 200 can approach or move away from the pressing assembly 300 along the first axis. The pressing assembly 300 can compress the sealing nail by making the bearing assembly 200 approach the pressing assembly 300 along the first axis. In other embodiments, the pressing assembly 300 can also be made to approach the bearing assembly 200 along the first axis so that the pressing assembly 300 can compress the sealing nail.

[0051] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, in some embodiments of the present application, the bearing assembly 200 includes a lifting seat 210 and a rotating seat 220. The lifting seat 210 can approach or move away from the pressing assembly 300 along the first axis; the rotating seat 220 is arranged on the lifting seat 210, and the rotating seat 220 can rotate around the first axis, and the rotating seat 220 is used to carry the battery. In some specific embodiments, the bearing assembly 200 also includes a first driver 230 and a guide assembly, the first driver 230 is a cylinder, the cylinder is installed on the support plate 130, the piston rod of the cylinder is parallel to the first axis, and the piston rod of the cylinder is connected to the lifting seat 210. In other embodiments, the first driver 230 can also be a hydraulic cylinder or an electric cylinder or a motor. The guide assembly includes a guide rail 240 and a slider, the guide rail 240 is installed on the support plate 130, the guide rail 240 extends along the first axis, and the slider is slidably installed on the guide rail 240 and can move along the guide rail 240. The back of the lifting seat 210 is provided with a groove, and the slider can be inserted into the groove. The lifting seat 210 is fixedly connected with the slider bolt at the groove. When the piston rod of the cylinder is retracted, the lifting seat 210 rises along the guide rail 240 until the pressure piece 320 abuts against the sealing nail at the upper end of the battery; when the piston rod of the cylinder is extended, the lifting seat 210 descends along the guide rail 240, and the lifting seat 210 is reset. In some embodiments, the bearing assembly 200 also includes a second driver, which is a motor, which is installed on the other side of the support seat, and the output shaft of the motor is parallel to the first axis, and the output shaft of the motor is sleeved with an output wheel; the rotating seat 220 is coaxially connected to the transmission wheel through the coupling 260, and the output wheel is connected to the transmission wheel through a belt, so that the motor drives the output wheel to drive the transmission wheel to rotate through the belt, and then the coupling 260 coaxially connected to the transmission wheel rotates, and then the rotating seat 220 coaxially connected to the coupling 260 rotates, wherein the rotating seat 220 is cylindrical, and the central axis of the rotating seat 220 coincides with the first axis. Driven by the motor, the rotating seat 220 can be rotated around the first axis. Since the rotating seat 220 is installed on the lifting seat 210, the battery on the rotating seat 220 can move up and down along the first axis, so that the pressing piece 320 abuts against the sealing nail, and the battery on the rotating seat 220 can also rotate around the first axis, so that when the pressing piece 320 abuts against the sealing nail, the battery is kept rotating around the first axis, so as to directly weld the sealing nail and the injection port.

[0052] In some embodiments of the present application, the edge of the rotating seat 220 has an annular convex edge. Specifically, the inner side wall of the annular convex edge is gap-matched with the outer side wall of the battery, so that the lower end of the battery can be clamped in the annular convex edge to limit the position of the battery, thereby preventing the battery from shifting during the rotation of the battery and causing the pressing piece 320 to be separated from the sealing pin.

[0053] The general working principle of the embodiments of the present application is as follows:

[0054] The battery is placed on the rotating seat 220 , and the battery is limited on the rotating seat 220 by making the outer wall of the battery and the inner wall of the annular convex edge fit in the gap. The piston rod of the cylinder contracts to lift the lifting seat 210 upward along the first axis. The lifting seat 210 moves upward along the guide rail 240 under the lifting of the cylinder until the sealing pin on the upper end surface of the battery and the pressing piece 320 abut against each other, so that the sealing pin is pressed against the liquid injection port of the battery; the motor drives the output wheel to rotate the transmission wheel through the belt, and then the coupling 260 coaxially connected to the transmission wheel rotates, so that the rotating seat 220 coaxially connected to the coupling 260 rotates, and the battery on the rotating seat 220 rotates synchronously. At the same time, the pressing piece 320 and the sealing pin are kept against each other, and the pressing piece 320 rotates synchronously with the battery and the sealing pin around the first axis; when the sealing pin is pressed by the pressing piece 320 and the battery keeps rotating, the laser irradiates the welding laser to the welding area through the laser incident hole 311 at the top. During the welding process, the shielding gas spreads over the welding area through the shielding gas channel, and the matching part of the sealing pin and the liquid injection port is fully welded. By using the tooling of the present application to weld the sealing pins of the battery, the pre-spot welding process of the sealing pins can be eliminated. The full welding process of the sealing pins can be directly performed when the battery is compressed and rotated in conjunction with the laser output head. On the basis of ensuring the welding effect, the welding efficiency is greatly improved and the equipment cost is saved, especially for high-speed mass production line equipment.

[0055] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0059] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A sealing nail welding tool, characterized in that: include: frame; A bearing assembly, disposed on the frame, for bearing the battery and making the battery rotate around a first axis; A pressing assembly is arranged on the frame, and the pressing assembly can press against the sealing nail when the battery rotates around the first axis.

2. The sealing nail welding tool according to claim 1, characterized in that: The pressing component comprises: A pressing plate, arranged on the frame; A pressing piece is arranged on the pressing plate and can rotate around the first axis to abut against the sealing pin.

3. The sealing nail welding tool according to claim 2, characterized in that: The pressing piece is a spherical ball.

4. The sealing nail welding tool according to claim 3, characterized in that: The pressure-resisting assembly also includes a mounting block, which is arranged on the pressure plate. A mounting hole is opened on the mounting block, and the inner hole diameter of the mounting hole gradually decreases near one end of the bearing assembly. The spherical ball is arranged in the mounting hole near one end of the bearing assembly and a part of the spherical surface protrudes from the mounting hole.

5. The sealing nail welding tool according to claim 4, characterized in that: The pressing assembly further comprises a top screw, which is arranged at one end of the mounting hole away from the bearing assembly, and the end of the top screw abuts against the spherical ball.

6. The sealing nail welding tool according to claim 2, characterized in that: The pressing assembly further comprises a guide ring, which is arranged on a side of the pressing plate close to the bearing assembly, and the pressing piece is located inside the guide ring.

7. The sealing nail welding tool according to claim 6, characterized in that: The inner side edge of the guide ring has a chamfer; And / or, a laser incident hole is opened on the pressing plate corresponding to the guide ring.

8. The sealing nail welding tool according to any one of claims 1 to 7, characterized in that: The bearing assembly can be moved closer to or farther away from the pressing assembly along the first axis.

9. The sealing nail welding tool according to any one of claims 1 to 7, characterized in that: The bearing assembly comprises: A lifting seat, capable of approaching or moving away from the pressing assembly along the first axis; The rotating seat is arranged on the lifting seat and can rotate around the first axis to carry the battery.

10. The sealing nail welding tool according to claim 9, characterized in that: The edge of the rotating seat is provided with an annular convex edge.

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