CN219553841U - Composite pole structure with stable connection and battery - Google Patents

Abstract

The utility model relates to the technical field of polar columns, and discloses a composite polar column structure and a battery which are stably connected, wherein the composite polar column structure comprises an aluminum column body and a copper column body which are arranged up and down, and the copper column body and the aluminum column body are fixedly connected; the lower part of the aluminum column body is provided with an embedded section embedded in the copper column body, and the periphery of the embedded section is outwards expanded to form an expansion ring; the top of the copper cylinder is recessed downwards to form a mounting groove, and the embedded section is embedded in the mounting groove; the mounting groove is provided with an annular side wall, the annular side wall is inwards bent to form a wrapping structure, and the embedded section is arranged in the wrapping structure. Like this, wrap up the gomphosis structure through the parcel structure and wrap up including, make the copper cylinder very firm with being connected between the aluminium cylinder, and this compound utmost point post structure is at fashioned in-process, directly adopts punching press extrusion, and its structural strength compares more firm through welded fastening, avoids in the in-process of using, and copper cylinder and aluminium cylinder faying face draw split and avoided welding failure's phenomenon.

Description

Composite pole structure with stable connection and battery

Technical Field

The utility model relates to the technical field of polar posts, in particular to a compound polar post structure with stable connection and a battery.

Background

The battery comprises a top cover plate, a shell, a battery core, a positive electrode post, a negative electrode post and the like, wherein the electrode post is used as one of important constituent structures of the battery, the quality of the connection effect of the electrode post directly influences the service effect and the service life of the battery, the electrode post is a part connected in the battery, one end of the electrode post is directly connected with a busbar, and the other end of the electrode post is connected with an external conductor or one electrode of an adjacent single battery in the battery pack.

The composite pole structure is generally formed by combining copper and aluminum materials, and a mounting hole for mounting the pole is arranged in the battery top cover plate, so that the connection between the inside and the outside is realized.

In the prior art, the composite pole structure is formed by combining a copper column body and an aluminum column body, and the copper column body and the aluminum column body are generally fixedly connected by friction welding, but in the use process, the strength of the composite pole structure is lower, and the phenomenon of cracking of a copper-aluminum bonding surface is easy to occur.

Disclosure of Invention

The utility model aims to provide a composite pole structure and a battery with stable connection, and aims to solve the problem of unstable connection between copper and aluminum in the composite pole structure in the prior art.

The utility model realizes the stable connection of the composite pole structure, and comprises an aluminum column body and a copper column body which are arranged up and down, wherein the copper column body is fixedly connected with the aluminum column body; the lower part of the aluminum column body is provided with an embedded section embedded in the copper column body, the periphery of the embedded section is outwards expanded to form an expansion ring, and the expansion ring is formed at the lower part of the embedded section;

the top of the copper cylinder is recessed downwards to form a mounting groove, the mounting groove is provided with a groove opening which is arranged upwards, and the embedded section is embedded in the mounting groove; the mounting groove is provided with an annular side wall, the annular side wall is inwards bent to form a wrapping structure, and the extending ring is wrapped by the wrapping structure.

Optionally, the periphery of extension ring is buckled upwards, forms the pressure ring, the pressure ring supports and presses on the extension ring, forms reinforced structure.

Optionally, the wrapping structure completely wraps the reinforcing structure.

Optionally, the upper portion of aluminum cylinder has upwards extends and exposes the epitaxial section above the copper cylinder, the outer terminal surface of epitaxial section is the planarization form.

Optionally, the wrapping structure has an abutment sidewall facing the outer periphery of the embedded section, the abutment sidewall abutting on the outer periphery of the embedded section completely closing the slot opening.

Optionally, the outer circumference of the epitaxial section expands outwards to form an outer end ring, and the outer end ring surrounds the outer circumference arranged at the top of the epitaxial section.

Optionally, an annular gap is formed at the top of the outer end ring, and the annular gap is arranged around the periphery of the outer end ring to form a gap ring.

Optionally, the middle part of the epitaxial section is recessed inwards to form a recessed ring; the concave rings are arranged in a surrounding mode; the groove ring is provided with a notch groove which is recessed towards the axial direction of the groove ring.

Optionally, the copper cylinder is provided with a copper fixing surface which is arranged upwards, the expansion ring is provided with a lower end surface which is arranged downwards, and the lower end surface is abutted on the copper fixing surface; the expansion ring is provided with an upper end face which is upwards arranged, and the propping ring is propped against the upper end face;

the distance between the copper fixing surface and the bottom of the copper cylinder is 0.5mm to 5mm; the thickness of the pressing ring is larger than or equal to that of the expansion ring; the extension ring and the periphery of the copper cylinder are provided with arrangement intervals, and the length of each arrangement interval is greater than or equal to the thickness of the abutting side wall.

Compared with the prior art, the composite pole structure with stable connection, provided by the utility model, has the advantages that the embedded structure is wrapped in the embedded structure through the wrapping structure, so that the connection between the copper pole body and the aluminum pole body is very stable, in the forming process, the composite pole structure is directly formed by stamping and extrusion, the structural strength is more stable compared with that of the composite pole structure by welding and fixing, the joint surface of the copper pole body and the aluminum pole body is prevented from being pulled apart in the using process, and the phenomenon of poor welding is avoided.

The battery comprises the composite pole structure with stable connection.

Compared with the prior art, the battery provided by the utility model comprises the composite pole structure with stable connection, the copper pole and the aluminum pole are connected firmly, and in the use process of the battery, the copper pole and the aluminum pole are connected firmly.

Drawings

FIG. 1 is a schematic perspective view of example 1 provided by the present utility model;

FIG. 2 is a schematic cross-sectional view of example 1 provided by the present utility model;

fig. 3 is a schematic perspective view of example 2 provided by the present utility model.

FIG. 4 is a schematic cross-sectional view of example 2 provided by the present utility model;

FIG. 5 is a schematic perspective view of example 3 provided by the present utility model;

fig. 6 is a schematic cross-sectional view of example 3 provided by the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The implementation of the present utility model will be described in detail below with reference to specific embodiments.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limiting the present utility model, and specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.

Referring to fig. 1-6, a preferred embodiment of the present utility model is provided.

The utility model provides a composite pole structure with stable connection, which comprises an aluminum pole body 100 and a copper pole body 200 which are arranged up and down, wherein the copper pole body 200 is fixedly connected with the aluminum pole body 100; the lower part of the aluminum cylinder 100 has an embedded section embedded in the copper cylinder 200, the outer circumference of the embedded section is extended outwards to form an extension ring 110, and the extension ring 110 is formed at the lower part of the embedded section;

the top of the copper cylinder 200 is recessed downwards to form a mounting groove, the mounting groove is provided with a groove opening which is arranged upwards, and the embedded section is embedded in the mounting groove; the mounting groove has annular side walls which are bent inwards to form a wrapping structure 210, and the wrapping structure 210 wraps the expansion ring 110.

The above-mentioned stable composite pole structure of connection that provides, including wrapping up the mosaic structure through wrapping up structure 210, make the copper cylinder 200 very firm with being connected between the aluminium cylinder 100, and this composite pole structure is at fashioned in-process, directly adopts punching press extrusion, and its structural strength compares more firm through welded fastening, avoids in the in-process of using, and copper cylinder 200 and aluminium cylinder 100 faying face stretch-break and avoided welding failure's phenomenon.

The outer periphery of the expansion ring 110 is bent upwards to form a pressing ring 111, and the pressing ring 111 presses against the expansion ring 110 to form a reinforcing structure. Thus, in the process of forming the composite pole structure, the periphery of the expansion ring 110 is curled upwards to form the pressing ring 111, and the pressing ring 111 and the expansion ring 110 are pressed to form the reinforced structure of the composite pole structure, so that the connection between the copper column 200 and the aluminum column 100 is reinforced, and the overall structure is more stable.

The wrap structure 210 completely wraps the reinforcement structure. Thus, the reinforcing structure is formed in the wrapping structure 210, and in the process of using the composite pole structure with stable connection, the wrapping structure 210 makes the reinforcing structure unable to separate from the mounting groove, and continuously presses the reinforcing structure, so that the overall structure is more stable.

Referring to fig. 1 and 2, embodiment 1 is shown; the upper portion of the aluminum cylinder 100 has an epitaxial section extending upward and exposed above the copper cylinder 200, and the outer end surface of the epitaxial section is flat. Thus, the flat outer end surface facilitates the arrangement of the connection structure with the battery on the outer end surface, and the upward extending epitaxial section aluminum column body 100 can play a role in reducing cost.

Simultaneously, the periphery of the epitaxial section is provided with an inwards concave notch 101, and after encapsulation, the notch 101 can improve the anti-torsion performance of the composite pole structure.

The packing structure 210 has an abutment side wall 211 facing the outer periphery of the insertion section, and the abutment side wall 211 abuts on the outer periphery of the insertion section to completely close the slot opening. In this way, the wrapping structure 210 completely closes the slot opening, making the overall structure more compact and making the connection between the aluminum cylinder 100 and the copper cylinder 200 more stable.

Referring to fig. 3 and 4, embodiment 2 is shown; the outer periphery of the epitaxial section expands outwardly forming an outer end ring 120, the outer end ring 120 surrounding the outer periphery disposed on top of the epitaxial section. In this way, other regions of the epitaxial section form recessed regions, which can act as encapsulated regions, as compared to the outer end ring 120.

Meanwhile, the periphery of the extension section is recessed inwards to form an encapsulation hole 102, the encapsulation hole is positioned below the outer end ring 120, and after encapsulation is finished, the encapsulation hole 102 can improve the anti-torsion performance of the composite pole structure.

Described with reference to fig. 5 and 6, embodiment 3; the top of the end ring is provided with an annular gap ring 121 arranged around the outer circumference of the outer end ring 120 forming a gap ring 121. Thus, the annular gap can be used as an encapsulation area, and the torsion resistance of the annular gap is improved after encapsulation molding.

The middle of the epitaxial section is recessed inwards to form a recessed ring 130; the recessed ring 130 is circumferentially arranged; the groove ring 130 is provided with a notch groove 131, and the notch groove 131 is recessed towards the axial direction of the groove ring 130. Therefore, the concave area which is concave inwards can be used as an encapsulation area, after encapsulation molding, the torsion resistance is improved, and after the notch groove 131 is arranged for injecting glue, the torsion resistance is further improved.

The copper cylinder 200 has a copper fixing surface arranged upward, the extension ring 110 has a lower end surface arranged downward, and the lower end surface abuts against the copper fixing surface; the expansion ring 110 has an upper end surface arranged upward, and the pressing ring 111 presses against the upper end surface;

the interval between the copper fixing surface and the bottom of the copper column 200 is 0.5mm to 5mm; the thickness of the pressing ring 111 is greater than or equal to the thickness of the expansion ring 110; the extension ring 110 and the outer periphery of the copper cylinder 200 have an arrangement interval, and the length of the arrangement interval is greater than or equal to the thickness of the abutment side wall 211. Therefore, the connection among the various component structures of the formed composite pole structure is more compact, so that the overall structure is more stable, the above size requirements are met, and the connection stability of the copper column 200 and the aluminum column 100 is ensured.

The battery comprises the composite pole structure with stable connection. Like this, be connected comparatively firm between copper cylinder 200 and aluminum cylinder 100, the battery is in the in-process of using, is connected firmly between copper cylinder 200 and aluminum cylinder 100, compares in traditional friction welding, can not appear the stretch-break phenomenon between aluminum cylinder 100 and copper cylinder 200 to this compound utmost point post structure adopts direct stamping extrusion, avoids appearing the phenomenon of welding failure.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The composite pole structure with stable connection is characterized by comprising an aluminum column body and a copper column body which are arranged up and down, wherein the copper column body is fixedly connected with the aluminum column body; the lower part of the aluminum column body is provided with an embedded section embedded in the copper column body, the periphery of the embedded section is outwards expanded to form an expansion ring, and the expansion ring is formed at the lower part of the embedded section;

the top of the copper cylinder is recessed downwards to form a mounting groove, the mounting groove is provided with a groove opening which is arranged upwards, and the embedded section is embedded in the mounting groove; the mounting groove is provided with an annular side wall, the annular side wall is inwards bent to form a wrapping structure, and the extending ring is wrapped by the wrapping structure.

2. The connection-stable composite post structure according to claim 1, wherein the outer periphery of the expansion ring is bent upward to form a pressing ring, and the pressing ring is pressed against the expansion ring to form a reinforcing structure.

3. The connection-stable composite pole structure of claim 2, wherein the containment structure completely encapsulates the reinforcement structure.

4. The connection-stable composite post structure according to claim 3, wherein the upper portion of the aluminum column has an extension section extending upward and exposed above the copper column, and an outer end surface of the extension section is flat.

5. The connection-stable composite pole structure of claim 4, wherein the wrap-around structure has an abutment sidewall toward the outer periphery of the embedded segment, the abutment sidewall abutting on the outer periphery of the embedded segment completely closing the slot opening.

6. The connection-stable composite post structure of claim 5, wherein the outer perimeter of the epitaxial section expands outwardly forming an outer end ring that surrounds the outer perimeter disposed at the top of the epitaxial section.

7. The connection-stable composite post structure according to claim 6, wherein the top of the outer end ring is provided with an annular gap disposed around the outer circumference of the outer end ring forming a gap ring.

8. The connection-stable composite post structure according to claim 7, wherein the middle portion of the epitaxial section is recessed inward to form a recessed ring, and the recessed ring is circumferentially arranged; the notch groove is arranged on the concave ring and axially concave towards the concave ring.

9. The connection-stable composite post structure according to any one of claims 4 to 8, wherein the copper cylinder has a copper fixing face arranged upward, the expansion ring has a lower end face arranged downward, and the lower end face abuts on the copper fixing face; the expansion ring is provided with an upper end face which is upwards arranged, and the propping ring is propped against the upper end face;

the distance between the copper fixing surface and the bottom of the copper cylinder is 0.5mm to 5mm; the thickness of the pressing ring is larger than or equal to that of the expansion ring; the extension ring and the periphery of the copper cylinder are provided with arrangement intervals, and the length of each arrangement interval is greater than or equal to the thickness of the abutting side wall.

10. A battery comprising a connection-stable composite post structure according to any one of claims 1 to 9.