Welding press mechanism for battery conductive member and press device

Abstract

This invention belongs to the technical field of battery manufacturing equipment and discloses a welding and clamping mechanism and device for conductive components in batteries. The mechanism includes an outer sleeve, an inner sleeve, a reset elastic element, and a clamping element. The outer sleeve has a mounting hole extending along its central axis. The inner sleeve is fitted inside the mounting hole, and the inner wall of the mounting hole has a first arc-shaped curved surface. The outer wall of the inner sleeve has a second arc-shaped curved surface. The first and second arc-shaped curved surfaces are adapted to achieve a hinged fit between the inner and outer sleeves. A reset elastic element is also sandwiched between the outer wall of the inner sleeve and the inner wall of the outer sleeve. The reset elastic element tends to drive the inner and outer sleeves to be collinear. The clamping element is connected to one end of the inner sleeve and configured to apply a clamping force to the connecting piece to be welded onto the conductive component. Through the above configuration, the clamping element can tilt slightly according to the tilt angle of the connecting piece and accurately overlap with it, thereby stably clamping it onto the connecting piece, avoiding welding gaps, and improving welding quality.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing equipment technology, and in particular to a welding and pressing mechanism and pressing equipment for battery conductive components. Background Technology

[0002] Currently, in the battery production process, before welding the connecting piece to the conductive parts (terminals or plates) of the battery cell, the connecting piece and the conductive parts need to be pressed together to ensure the welding effect.

[0003] Currently, the mainstream method for assembling large cylindrical battery cells is to weld conductive components and connecting plates using laser welding technology. Because the laser is linearly focused, the weld seam is extremely narrow, and the penetration depth is very shallow. Therefore, if the welding surface is tilted, the laser focus is easily misaligned, leading to phenomena such as incomplete welds, missed welds, and burn-through. Thus, the tilt accuracy of the welded area after assembly is extremely critical. Currently, a method of increasing the gap between the spring mandrel and the guide sleeve is often used to achieve alignment and fine-tuning of the battery cell during assembly. However, due to the radial gap between the mandrel and the guide sleeve, the battery cell is prone to wobbling and tilting during assembly, resulting in poor positioning stability. Simultaneously, the mandrel, driven by the spring, is prone to eccentric movement, causing eccentric friction with the guide sleeve, leading to problems such as movement jamming and poor extension / retraction, thus seriously hindering the welding process.

[0004] In summary, there is an urgent need to design a welding and clamping mechanism and equipment for battery conductive components to improve the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a welding and clamping mechanism and equipment for battery conductive components, which can further improve the stability of welding quality.

[0006] To achieve this objective, the present invention adopts the following technical solution: A welding clamping mechanism for battery conductive components includes an outer sleeve, an inner sleeve, a reset elastic element, and a clamping element. The outer sleeve has a mounting hole that extends through its central axis. The inner sleeve is fitted inside the mounting hole, and the inner wall of the mounting hole has a first arc-shaped curved surface. The outer wall of the inner sleeve has a second arc-shaped curved surface. The first arc-shaped curved surface and the second arc-shaped curved surface are adapted to achieve a hinged fit between the inner sleeve and the outer sleeve. The reset elastic element is also sandwiched between the outer wall of the inner sleeve and the inner wall of the outer sleeve. The reset elastic element has a tendency to drive the inner sleeve and the outer sleeve to be collinear. The clamping element is connected to one end of the inner sleeve and is configured to apply a clamping force to the connecting piece to be welded onto the conductive component.

[0007] Preferably, the inner wall of the mounting hole is further provided with a relief groove, which is used to limit and accommodate the reset elastic element.

[0008] Preferably, the clearance groove is disposed adjacent to the first arc-shaped surface along the central axis of the outer casing.

[0009] Preferably, both the first arcuate surface and the second arcuate surface are spherical surfaces.

[0010] Preferably, the outer sleeve includes at least two collars, the collars are arc-shaped, and the at least two collars are connected to form the outer sleeve, and adjacent collars are detachably connected.

[0011] Preferably, each end of the collar has a protruding ear, and the ears of adjacent collars are opposite and abut against each other; the welding and clamping mechanism also includes a fastener, which is detachably connected to the two oppositely arranged ears.

[0012] Preferably, the clamping member includes a copper sleeve and a telescopic connector. The copper sleeve is used to apply a pressing force to the connecting piece on the conductive element. The telescopic connector is connected between the inner sleeve and the copper sleeve and can extend and retract along the central axis of the outer sleeve.

[0013] Preferably, the telescopic connector includes a guide rod and a spring. The guide rod extends along the central axis of the outer sleeve, and its two ends are respectively connected to the inner sleeve and the copper sleeve and slidably connected to at least one of them. The spring is sleeved on the guide rod, and its two ends abut against the inner sleeve and the copper sleeve, respectively.

[0014] Preferably, the telescopic connector further includes a baffle plate, which is connected to the guide rod and disposed on opposite sides of the copper sleeve, spaced apart from the spring. Preferably, A clamping device includes a stroke mechanism and a welding clamping mechanism. The stroke mechanism is connected to the welding clamping mechanism and can drive the welding clamping mechanism to move along a preset direction. The welding clamping mechanism is the welding clamping mechanism described above.

[0015] Beneficial effects: In the welding and clamping mechanism for battery conductive components provided in this embodiment, the outer and inner sleeves can be tightly connected through an inner and outer nesting method. The first and second arc-shaped surfaces allow the inner sleeve to rotate at any angle around the central axis of the outer sleeve, achieving adaptive fine-tuning of the clamping component's posture without radial wobble. Thus, when the connecting piece is pressed against the conductive component at a preset tilt angle, the clamping component can tilt slightly according to the tilt angle of the connecting piece, ensuring that the tilt angle of the clamping component precisely matches the tilt angle of the connecting piece. This stable clamping onto the connecting piece avoids gaps caused by excessive tilt angle between the connecting piece and the electrode, thus preventing incomplete welding and effectively improving the stability of the welding quality between the connecting piece and the conductive component.

[0016] The clamping device provided in this embodiment, by configuring the above-mentioned welding clamping mechanism, enables the clamping device to adapt to the tilt angle of the connecting piece and press it vertically onto the connecting piece, so that the welding surfaces of the connecting piece and the conductive component can be tightly attached, with high stability and less prone to jamming during use, thereby ensuring the quality of welding and finished products and improving welding efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the welding and clamping mechanism for battery conductive components provided in an embodiment of the present invention; Figure 2 This is a cross-sectional view of a welding and clamping mechanism for battery conductive components provided in an embodiment of the present invention.

[0018] In the picture: 100. Connecting piece; 200. Conductive component; 1. Outer jacket; 1011. First arc-shaped surface; 1012. Clearance groove; 11. Collar; 111. Ear; 1111. Fastening hole; 1112. Positioning hole; 2. Inner sleeve; 21. Second arc-shaped surface; 3. Reset elastic element; 4. Clamping component; 41. Copper sleeve; 42. Telescopic connector; 421. Guide rod; 4211. Threaded connection section; 422. Spring; 423. Baffle plate. Detailed Implementation

[0019] To make the technical problems solved by this invention, the technical solutions adopted, and the technical effects achieved clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to this invention, not the entire structure.

[0020] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0023] The following is combined with Figures 1 to 2 The present invention will be described in detail with specific embodiments, including the welding and pressing mechanism and pressing equipment for battery conductive components.

[0024] Combination Figures 1 to 2 As shown, the welding and clamping mechanism for battery conductive components provided in this embodiment specifically includes an outer sleeve 1, an inner sleeve 2, a reset elastic element 3, and a clamping element 4, wherein the outer sleeve 1 has a central axis (refer to...) Figure 2 (As shown by the dashed line X) A mounting hole is provided through the inner sleeve 2, which is fitted inside the mounting hole. The inner wall of the mounting hole is provided with a first arc-shaped curved surface 1011, and the outer wall of the inner sleeve 2 is provided with a second arc-shaped curved surface 21. The first arc-shaped curved surface 1011 and the second arc-shaped curved surface 21 are adapted to achieve the hinged fit between the inner sleeve 2 and the outer sleeve 1. A reset elastic element 3 is also sandwiched between the outer wall of the inner sleeve 2 and the inner wall of the outer sleeve 1. The reset elastic element 3 has the tendency to drive the inner sleeve 2 and the outer sleeve 1 to be collinear, so that the deflected inner sleeve 2 returns to its initial position for subsequent use. One end of the inner sleeve 2 is connected to the clamping element 4, so that the clamping element 4 can move synchronously with the inner sleeve 2. The clamping element 4 is mainly used to apply a pressing force to the connecting piece 100 to be welded on the conductive element 200, so that the welding surfaces between the connecting piece 100 and the conductive element 200 can be tightly pressed together, which facilitates the subsequent welding process.

[0025] Through the above settings, the outer sleeve 1 and the inner sleeve 2 can be tightly connected by nesting. The first arc-shaped surface 1011 and the second arc-shaped surface 21 allow the inner sleeve 2 to rotate at any angle around the central axis of the outer sleeve 1, achieving adaptive fine-tuning of the clamping member 4's posture without radial swaying. Thus, in practical use, when the connecting piece 100 is pressed against the conductive member 200 at a preset inclination, the welding clamping mechanism can move vertically towards the connecting piece 100. When the clamping member 4 abuts against the connecting piece 100, it can tilt slightly according to the inclination angle of the connecting piece 100, ensuring the tilt angle of the clamping member 4 precisely coincides with the inclination angle of the connecting piece 100, thereby stably clamping it onto the connecting piece 100. This avoids gaps between the connecting piece 100 and the electrode due to excessive inclination, thus preventing incomplete welding and effectively improving the stability of the welding quality between the connecting piece 100 and the conductive member 200. Moreover, after the inner sleeve 2 is hinged to the outer sleeve 1 and swings or rotates, the reset elastic element 3 can drive the inner sleeve 2 to automatically return to the initial posture, which facilitates repeated operations.

[0026] The conductive element 200 can be a post or an electrode, depending on the type of battery. For example, for batteries composed of a stacked structure, the conductive element 200 is an electrode, while for other types of batteries, the conductive element 200 is a post. This invention does not limit this.

[0027] Optionally, in the embodiments of this application, the first arc-shaped surface 1011 and the second arc-shaped surface 21 are both spherical surfaces, so that the inner sleeve 2 can maintain a stable and uniform fit gap at any circumferential angle, and will not have local interference, jamming or poor movement due to different swing directions, thereby further improving the safety and stability of the rotation of the inner sleeve 2 and better meeting the requirements for tilt control of the welding between the battery connecting piece 100 and the conductive part 200.

[0028] Specifically, refer to Figure 1 As shown, the outer sleeve 1 has a split structure and includes at least two arc-shaped collars 11. The collars 11 are connected together to form the outer sleeve 1, and adjacent collars 11 are connected by a detachable connection, which facilitates the nesting and fitting of the outer sleeve 1 and the inner sleeve 2, and also helps to maintain and replace the outer sleeve 1 and the inner sleeve 2 separately, reducing maintenance costs. Preferably, in the embodiment of this application, the outer sleeve 1 includes two semi-circular collars 11, which reduces the assembly difficulty and meets the installation efficiency requirements under actual working conditions.

[0029] Furthermore, in this embodiment, each end of the collar 11 has a protruding ear 111, and the ears 111 of adjacent collars 11 are opposite and abut against each other. In addition, the welding clamping mechanism also includes fasteners, which are generally threaded fasteners. The threaded fasteners are assembled on the ears 111 of adjacent collars 11 to fix the adjacent ears 111 together, thereby ensuring the installation stability between the outer sleeve 1 and the inner sleeve 2. Correspondingly, the ears 111 have a plurality of fastening holes 1111 for the threaded fasteners to pass through. It is understood that in two adjacent ears 111, the fastening hole 1111 of one ear 111 is threaded, and the fastening hole 1111 of the other ear 111 is a through hole, so that the threaded fastener passes through the through hole and is threadedly connected to the fastening hole 1111.

[0030] Furthermore, several positioning holes 1112 are provided on each ear 111. The positioning holes 1112 are located on one side of the fastening hole 1111. The positioning holes 1112 of adjacent ears 111 can be aligned and coaxially set. Subsequently, a positioning pin passes through the two positioning holes 1112 to achieve the purpose of positioning the two collars 11 before installing the threaded connector.

[0031] Optionally, in this embodiment, the inner wall of the mounting hole is further provided with a clearance groove 1012. By providing the clearance groove 1012, the radial gap between the inner sleeve 2 and the outer sleeve 1 is appropriately increased, so that the reset elastic member 3 can be interference-fitted into the clearance groove 1012, thereby realizing the installation of the reset elastic member 3 between the inner sleeve 2 and the outer sleeve 1. Preferably, the reset elastic member 3 is an elastic rubber ring.

[0032] Furthermore, the clearance groove 1012 and the first arc-shaped surface 1011 are arranged adjacent to each other along the central axis of the outer sleeve 1. That is, a part of the mounting hole along the central axis of the outer sleeve 1 is set as the first arc-shaped surface 1011, and the other part is provided with the clearance groove 1012. This can ensure that the inner sleeve 2 and the outer sleeve 1 form a stable and reliable spherical kinematic pair structure through the first arc-shaped surface 1011, realizing the adaptive swing and attitude adjustment of the inner sleeve 2. At the same time, the clearance groove 1012 can provide sufficient movement space for the swing of the inner sleeve 2, avoiding structural interference between the inner sleeve 2 and the inner wall of the outer sleeve 1 when the inner sleeve 2 rotates relative to the outer sleeve 1, effectively preventing the phenomenon of jamming.

[0033] Optionally, in this embodiment, the clamping member 4 includes a copper sleeve 41 and a telescopic connector 42. The copper sleeve 41 is used to apply a force to the connecting piece 100 to press against the conductive member 200. The telescopic connector 42 is connected between the inner sleeve 2 and the copper sleeve 41 and can extend and retract along the central axis of the outer sleeve 1. This allows the clamping member 4 to absorb axial errors during the clamping process and avoid the phenomenon that the connecting piece 100 is damaged due to excessive force caused by rigid connection or is too small to be clamped. This further improves the clamping reliability and welding accuracy.

[0034] Specifically, in this embodiment, the telescopic connector 42 includes a guide rod 421 and a spring 422. The guide rod 421 extends along the central axis of the outer sleeve 1. The two ends of the guide rod 421 are respectively connected to the inner sleeve 2 and the copper sleeve 41 and are slidably connected to at least one of them. The spring 422 is sleeved on the guide rod 421, and the two ends of the spring 422 abut against the inner sleeve 2 and the copper sleeve 41 respectively. With the above settings, after the copper sleeve 41 is pressed onto the connecting piece 100, the copper sleeve 41 moves in the opposite direction under the reverse force of the connecting piece 100. At the same time, the spring 422 is deformed by compression. The spring 422 absorbs the reverse force of the connecting piece 100 and plays a certain buffering role, so that the copper sleeve 41 can be pressed onto the connecting piece 100 within the preset pressure range. Moreover, the spring 422 can also continuously deliver the elastic force pressing the copper sleeve 41 onto the connecting piece 100, so that the copper sleeve 41 can be stably pressed onto the connecting piece 100, avoiding the phenomenon of loosening during the welding process of the connecting piece 100 and the conductive component 200.

[0035] More specifically, in the embodiments of this application, one end of the guide rod 421 is provided with a threaded connection section 4211, the outer periphery of which is provided with an external thread structure, and the inner sleeve 2 is provided with an internal thread mating hole at one end facing the guide rod 421. By threading the threaded connection end into the internal thread mating hole, the guide rod 421 and the inner sleeve 2 are fixedly connected; at the same time, the other end of the guide rod 421 can be slidably connected with the copper sleeve 41, so that the telescopic connection 42 can be telescopically extended by sliding the copper sleeve 41 on the guide rod 421.

[0036] Furthermore, in the embodiments of this application, the telescopic connector 42 also includes a baffle 423, which is connected to the other end of the guide rod 421 and is disposed on opposite sides of the copper sleeve 41 at a distance from the spring 422. By setting the baffle 423, the movement stroke of the guide rod 421 is restricted, thus preventing the guide rod 421 from detaching from the copper sleeve 41.

[0037] Furthermore, in this embodiment, the baffle 423 and the guide rod 421 are threaded together to facilitate the assembly and disassembly of the guide rod 421 and the copper sleeve 41. The baffle 423 is generally made of metal, which provides good performance and a long lifespan, reducing the frequency of baffle 423 replacements and effectively controlling operating costs.

[0038] This embodiment also provides a clamping device, which includes a stroke mechanism and the aforementioned welding clamping mechanism. The stroke mechanism is connected to the welding clamping mechanism and can drive the welding clamping mechanism to move along a preset direction, i.e., vertically. This allows it to accommodate batteries of different heights and enable the welding of the connecting piece 100 and the conductive component 200 for batteries of different heights. Accordingly, the clamping device can adapt to the tilt angle of the connecting piece 100 and clamp it vertically onto the connecting piece 100, ensuring that the welding surfaces of the connecting piece 100 and the conductive component 200 are tightly fitted together with high stability and minimal jamming during use. This guarantees welding and finished product quality and improves welding efficiency.

[0039] In the description of this specification, the terms "some embodiments," "other embodiments," "an embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity, and those skilled in the art should consider the specification as a whole. The technical solutions in the various embodiments can also be appropriately combined to form other embodiments understood by those skilled in the art.

[0040] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A welding press mechanism for battery current collectors, characterized by, The assembly includes an outer sleeve (1), an inner sleeve (2), a reset elastic element (3), and a clamping element (4). The outer sleeve (1) has a mounting hole that runs through it along its central axis. The inner sleeve (2) is fitted inside the mounting hole. The inner wall of the mounting hole is provided with a first arc-shaped curved surface (1011). The outer wall of the inner sleeve (2) is provided with a second arc-shaped curved surface (21). The first arc-shaped curved surface (1011) and the second arc-shaped curved surface (21) are adapted to achieve a hinged fit between the inner sleeve (2) and the outer sleeve (1). The reset elastic element (3) is also sandwiched between the outer wall of the inner sleeve (2) and the inner wall of the outer sleeve (1). The reset elastic element (3) has a tendency to drive the inner sleeve (2) and the outer sleeve (1) to be collinear. The clamping element (4) is connected to one end of the inner sleeve (2) and is configured to apply a pressing force on the conductive element (200) to the connecting piece (100) to be welded.

2. The welding hold down mechanism for battery electrical conductors of claim 1, wherein, The inner wall of the mounting hole is also provided with a relief groove (1012), which is used to limit and accommodate the reset elastic element (3).

3. The welded crimp mechanism for battery electrical conductors of claim 2, wherein, The clearance groove (1012) and the first arc-shaped surface (1011) are arranged adjacent to each other along the central axis of the outer jacket (1).

4. The welded crimp mechanism for battery electrical conductors of claim 1, wherein, Both the first arc-shaped surface (1011) and the second arc-shaped surface (21) are spherical surfaces.

5. The welded crimp mechanism for battery electrical conductors of claim 1, wherein, The outer sleeve (1) includes at least two collars (11), the collars (11) are arc-shaped, and at least two collars (11) are connected to form the outer sleeve (1), and adjacent collars (11) are detachably connected.

6. The welded crimp mechanism for battery electrical conductors of claim 5, wherein, Each end of the collar (11) has a protruding ear (111), and the ears (111) of adjacent collars (11) are opposite to each other and abut against each other; the welding and pressing mechanism also includes a fastener, which is detachably connected to the two ears (111) that are opposite to each other.

7. The welding hold-down mechanism for a battery electrical conductor of any one of claims 1-6, wherein, The clamping member (4) includes a copper sleeve (41) and a telescopic connector (42). The copper sleeve (41) is used to apply a force to the connecting piece (100) to press against the conductive member (200). The telescopic connector (42) is connected between the inner sleeve (2) and the copper sleeve (41) and can extend and retract along the central axis of the outer sleeve (1).

8. The welding hold down mechanism for battery electrical conductors of claim 7, wherein, The telescopic connector (42) includes a guide rod (421) and a spring (422). The guide rod (421) extends along the central axis of the outer sleeve (1). The two ends of the guide rod (421) are respectively connected to the inner sleeve (2) and the copper sleeve (41) and are slidably connected to at least one of them. The spring (422) is sleeved on the guide rod (421), and the two ends of the spring (422) abut against the inner sleeve (2) and the copper sleeve (41) respectively.

9. The welding hold down mechanism for battery electrical conductors of claim 8, wherein, The telescopic connector (42) also includes a baffle (423), which is connected to the guide rod (421) and is disposed on opposite sides of the copper sleeve (41) at a distance from the spring (422).

10. Compacting plant, characterised in that It includes a travel mechanism and a welding clamping mechanism. The travel mechanism is connected to the welding clamping mechanism and can drive the welding clamping mechanism to move along a preset direction. The welding clamping mechanism is the welding clamping mechanism according to any one of claims 1-9.

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