Plug-in type pole structure

Abstract

The utility model relates to the technical field of lithium battery assembly, and particularly discloses a plug-in type pole structure which comprises a plug-in seat and a plug-in head, the bayonet socket comprises a bottom plate and a fence, the fence is arranged on the periphery of the bottom plate, the fence and the bottom plate form an insertion cavity, one end of the insertion cavity is closed, the other opposite end of the insertion cavity is open, a plurality of limiting grooves are formed in the fence, and a plurality of elastic connecting pieces are vertically fixed to the bottom plate; the connecting plug comprises a connecting plug body, the connecting plug body is vertically provided with a plurality of jacks, and the periphery of the connecting plug body is also provided with a plurality of elastically telescopic extrusion pieces; after the connecting plug body is inserted into the inserting cavity, the elastic connecting piece is located in the inserting hole, and the extrusion piece is clamped into the limiting groove. According to the utility model, reliable connection between the positive pole and the negative pole is realized, the process difficulty and the process cost of cell integration are reduced, the cell grouping efficiency is favorably improved, the cell is convenient to disassemble and maintain, and the maintenance cost is favorably reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery assembly technology, and in particular to a plug-in electrode structure. Background Technology

[0002] In the assembly of single lithium-ion battery cells, busbars are typically used to weld the terminals of the cells together using laser penetration. Because the busbars are located above the terminals, the welding quality cannot be directly monitored, leading to inconsistent welding and a tendency for incomplete soldering between the busbars and terminals, resulting in poor welds. When the battery module or pack experiences significant vibration, relative displacement occurs between the cells, placing considerable forces on the connection between the busbars and terminals. This can easily cause the busbars and terminals to loosen or crack, affecting battery safety. Furthermore, the single-cell integration method using laser penetration welding for terminals not only has poor maintainability but also makes the battery integration process difficult, complex, inefficient, and costly.

[0003] Therefore, this application is submitted. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a plug-in pole structure.

[0005] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0006] A plug-in pole structure includes a plug socket and a plug connector;

[0007] The plug-in socket includes a base plate and a enclosure. The enclosure is set on the outer periphery of the base plate and forms a plug-in cavity with one end closed and the other end open. Several limiting grooves are provided on the enclosure, and several elastic connectors are vertically fixed on the base plate.

[0008] The connector includes a connector body, which has a plurality of insertion holes vertically formed along its height direction, and a plurality of extrusion members that are elastically and telescopically connected to the outer periphery of the connector body.

[0009] The structure of the connector body matches the structure of the connector cavity, the number and structure of the elastic connector match the number of the sockets, and the number and structure of the compression member match the number of the limiting groove. After the connector body is inserted into the connector cavity, the elastic connector is located in the socket and the compression member is inserted into the limiting groove.

[0010] Preferably, a number of elastic connectors are evenly and symmetrically distributed on the base plate, and a number of sockets are evenly and symmetrically distributed on the connector body.

[0011] Preferably, the connector body includes a first connector segment and a second connector segment, the socket is a through hole perpendicularly opened along the height direction of the first connector segment and the second connector segment, the connection between the first connector segment and the second connector segment forms a stepped structure, and the bottom of the connector cavity is provided with a first engaging step, the stepped structure matching the first engaging step structure.

[0012] Preferably, the elastic connector includes a large plug post, a small plug post, and a coil spring. The small plug post is fixedly connected to the upper end face of the large plug post, the coil spring is sleeved on the small plug post and one end is fixedly connected to the upper end face, and the lower end face of the large plug post is fixedly connected to the base plate.

[0013] Preferably, the connection between the large plug and the small plug forms a stepped structure, and a second engaging step is provided in the plug hole, wherein the stepped structure matches the second engaging step structure.

[0014] Preferably, four strip-shaped limiting grooves are evenly provided on the enclosure, and four extrusion members are provided corresponding to the four limiting grooves.

[0015] Preferably, the upper surface of the extruded part is a smooth arc surface or a slope.

[0016] Preferably, the base plate is a circular structure, the first engaging step is a ring structure, and the connector body is a cylindrical structure. The outer diameters of the enclosure, the first engaging step, and the base plate are D1, D2, and D3 respectively, and D1, D2, and D3 satisfy: 10mm < D3 < D2 < D1 < 250mm.

[0017] Preferably, the height of the limiting groove is H3, the height of the second insertion section is H2, and the height of the enclosure is H1, wherein: 1 < H3 < 0.5H1, 0 ≤ H2 ≤ 0.5H1, and 1 mm < H1 < 30 mm.

[0018] Preferably, the wall thickness of the enclosure is T1, and the length of the limiting groove is L1. T1 and L1 satisfy: 1mm≤T1<5mm, 1mm<L1<250mm.

[0019] Compared with the prior art, the electrode structure proposed in this utility model can achieve a stable and firm connection between the battery cell electrodes by using a plug-in socket and a plug connector, without the need for busbar laser welding. This not only improves the reliable connection between the positive and negative electrodes and reduces the possibility of poor contact, but also reduces the process difficulty and cost of battery cell integration, which helps to improve the efficiency of battery cell assembly. It also facilitates the disassembly and maintenance of individual batteries, which helps to reduce maintenance costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is one embodiment of the present invention.

[0022] Figure 2 for Figure 1 A three-dimensional structural diagram of a medium-elastic connector;

[0023] Figure 3 for Figure 1 Enlarged structural diagram at point M;

[0024] Figure 4 for Figure 1 Top view of the center connector;

[0025] Figure 5 for Figure 1 Front view of the center connector;

[0026] Figure 6 for Figure 1 Top view of the center connector;

[0027] Figure 7 for Figure 6 A magnified structural diagram at point N;

[0028] Figure 8 for Figure 1 Bottom view of the center connector;

[0029] Figure 9 for Figure 1 Front view of the center connector.

[0030] In the diagram: A, plug-in connector; A1, enclosure; A11, limiting groove; A2, first engaging step; A3, base plate; A4, elastic connector; A41, large plug-in post; A42, small plug-in post; A43, coil spring; B, plug connector; B1, first plug-in section; B2, second plug-in section; B21, insertion hole; B22, second engaging step; B3, extrusion component. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that any components or structures not described in detail below employ conventional techniques in this field. Those skilled in the art can combine and use them without any inventive effort.

[0033] like Figures 1-9 As shown in the figure: This utility model proposes a plug-in pole structure, including a plug-in socket A and a plug connector B;

[0034] The plug-in socket A includes a base plate A3 and a enclosure A1. The base plate A3 has a circular structure. The enclosure A1 is set on the outer periphery of the base plate A3 and forms a plug-in cavity with one end closed and the other end open. Several limiting grooves A11 are opened on the enclosure A1. Several elastic connectors A4 are vertically fixed on the base plate A3.

[0035] The connector B includes a connector body, which is a cylindrical structure. The connector body has several holes B21 vertically opened along its height direction. The outer periphery of the connector body is also provided with several extrusion members B3 that are elastically and extensibly connected to the outer periphery.

[0036] The structure of the connector body matches the structure of the connector cavity, the number and structure of the elastic connector A4 match the number of the socket B21, and the number and structure of the compression member B3 match the number of the limiting groove A11. After the connector body is inserted into the connector cavity, the elastic connector A4 is located in the socket B21 and the compression member B3 is inserted into the limiting groove A11.

[0037] It should be noted that:

[0038] In practice, the base plate A3 can also be designed as a square or other structures. When the base plate A3 is designed as a square structure, the connector body is correspondingly designed as a square columnar structure. Of course, other existing or future designs are also possible. This embodiment lists a common circular structure for illustrative purposes only and is not intended to limit the specific implementation of the base plate A3.

[0039] The connection between the extrusion member B3 and the outer periphery of the connector body is existing technology. Specifically, an installation groove can be opened on the outer periphery of the connector body, and a spring structure can be installed in the installation groove. The extrusion member B3 is elastically and telescopically connected to the installation groove through the spring structure. When the extrusion member B3 is squeezed by an external force, it will automatically retract into the installation groove. When the external force is removed, the extrusion member B3 will automatically pop out and enter the limiting groove A11, similar to an existing door lock.

[0040] Working principle: Socket A and connector B are set on the positive cover plate and the negative cover plate, respectively. If socket A is set on the positive cover plate and connector B is set on the negative cover plate, a single cell is formed. When connecting two adjacent single cells, the connector B of one cell can be inserted into the socket A of the other cell without the need for laser welding.

[0041] Compared with the existing pole post connection method using laser welding, this utility model has at least the following advantages:

[0042] (1) The quick-connect method reduces the cost of pole connection, reduces the possibility of pole connection failure, and improves the yield rate;

[0043] (2) It is easy to operate, which reduces the process difficulty of cell integration and improves the efficiency of cell assembly;

[0044] (3) It facilitates the disassembly and repair of single cells, which helps to reduce maintenance costs.

[0045] To avoid intermittent connection problems, as a preferred technical solution, in another embodiment of this utility model, a plurality of elastic connectors A4 are evenly and symmetrically distributed on the base plate A3, and a plurality of sockets B21 are evenly and symmetrically distributed on the connector body. Each elastic connector A4 is inserted into one of the sockets B21. The more elastic connectors A4 there are, the better the contact between the positive and negative terminals. However, too many elastic connectors A4 will increase costs and hinder rapid connection. In practice, the number of elastic connectors A4 can be flexibly determined according to actual needs to balance cost, performance, and ease of connection.

[0046] As a preferred technical solution, in another embodiment of the present invention, the connector body includes a cylindrical first connector segment B1 and a cylindrical second connector segment B2. The insertion hole B21 is a through hole perpendicularly opened along the height direction of the first connector segment B1 and the second connector segment B2. A stepped structure is formed at the connection between the first connector segment B1 and the second connector segment B2. A first engaging step A2 is provided at the bottom of the connector cavity. The stepped structure matches the structure of the first engaging step A2.

[0047] When connector B is inserted into connector A, the stepped structure engages with the first engaging step A2, and under the limiting action of the pressing member B3, connector B and connector A are stably connected and in close contact. This improves the stability of the connection between adjacent cell terminals and enhances battery safety. The structure of the stepped structure cooperating with the first engaging step A2 provides a clear assembly direction and positioning point, making the assembly and disassembly process simpler and faster. It also reduces the gap after insertion and limits the relative displacement between the two, reducing the risk of loosening and falling off, and improving the reliability of the connection.

[0048] In this embodiment, the socket B21 is designed as a through hole structure that is easy to process, and the upper and lower ends of the through hole structure penetrate through both ends of the connector body.

[0049] As a preferred technical solution, in another embodiment of this utility model, the elastic connector A4 includes a cylindrical large plug A41, a cylindrical small plug A42, and a coil spring A43. The small plug A42 is fixedly connected to the upper end face of the large plug A41, the coil spring A43 is sleeved on the small plug A42 and one end is fixedly connected to the upper end face, and the lower end face of the large plug A41 is fixedly connected to the base plate A3.

[0050] In this embodiment, the free end of the coil spring A43 is slightly higher than the top of the small plug post A42 to ensure that after the elastic connector A4 is inserted into the plug hole B21, the coil spring A43 can provide a compressive force to ensure good contact between the positive and negative terminals.

[0051] As a preferred technical solution, in another embodiment of this utility model, a stepped structure is formed at the connection between the large plug post A41 and the small plug post A42, and a second engaging step B22 is provided in the plug hole B21, wherein the stepped structure matches the structure of the second engaging step B22.

[0052] In this embodiment, when the elastic connector A4 is inserted into the socket B21, the stepped structure engages with the second engaging step B22, which facilitates assembly and helps to achieve stable contact and positioning between the elastic connector A4 and the socket B21, ensuring the conductivity after the pole is inserted.

[0053] As a preferred technical solution, in another embodiment of the present invention, four strip-shaped limiting grooves A11 are evenly provided on the enclosure A1, and four extrusion members B3 are provided corresponding to the four limiting grooves A11.

[0054] Considering both setup cost and limiting effect, the limiting groove A11 is designed as a strip structure with its length direction distributed along the circumference of the enclosure A1; there are four limiting grooves A11. After the four extrusion parts B3 enter the limiting groove A11, they work together to limit the connection, which is more conducive to the long-term and stable connection between the connector B and the connector A.

[0055] As a preferred technical solution, in another embodiment of this utility model, the upper surface of the extrusion part B3 is a smooth arc surface or a slope surface.

[0056] In this embodiment, to improve the smoothness and fluidity of the connection between the connector B and the socket A, the outer surface of the extrusion piece B3 is a smooth arc or slope. Specifically, the thickness of the extrusion piece B3 is uneven, thicker near the first connector segment B1 and thinner further away from it. This creates an arc or slope on the upper surface of the extrusion piece B3. The thickness of the portion of the arc or slope that first enters the limiting groove A11 is less than the height of the limiting groove A11, ensuring smooth initial entry into the groove. As the extrusion piece B3 gradually enters the limiting groove A11, the thickness of the corresponding portion of the arc or slope gradually increases, with the portion entering the limiting groove A11 at the end having the greatest thickness, thus ensuring connection stability after the extrusion piece B3 is fully inserted into the groove.

[0057] As a preferred technical solution, in another embodiment of this utility model, the outer diameters of the enclosure A1, the first engaging step A2, and the base plate A3 are D1, D2, and D3 respectively, and D1, D2, and D3 satisfy: 10mm < D3 < D2 < D1 < 250mm.

[0058] After the connector B is connected to the connector A, the free end of the second connector segment B2 is in contact with the base plate A3. Therefore, the diameter of the second connector segment B2 is slightly smaller than the outer diameter D3 of the base plate A3. The part of the first connector segment B1 that is not covered by the second connector segment B2, i.e. the stepped structure, is in contact with the first engaging step A2. Therefore, the diameter of the first connector segment B1 is slightly smaller than the outer diameter D2 of the first engaging step A2.

[0059] As a preferred technical solution, in another embodiment of this utility model, the wall thickness of the enclosure A1 is T1, and the length of the limiting groove A11 is L1. T1 and L1 satisfy: 1mm≤T1<5mm, 1mm<L1<250mm.

[0060] When the extrusion piece B3 is in its natural state, the length of the extrusion piece B3 is defined as its extension along the radius of the first insertion segment B1 in a direction away from the outer periphery of the first insertion segment B1, and the width of the extrusion piece B3 is defined as its extension along the outer periphery of the first insertion segment B1. To ensure that the extrusion piece B3 plays a stable limiting role after being inserted into the limiting groove A11, there are certain limitations on the dimensions of the extrusion piece B3: the thickest part of the extrusion piece B3 is slightly smaller than the height H3 of the limiting groove A11, the width of the extrusion piece B3 is slightly smaller than the length L1 of the limiting groove A11, and the length of the extrusion piece B3 is slightly larger than the wall thickness T1 of the enclosure A1.

[0061] To ensure that after connector B is connected to connector A, connector A provides stable support for connector B, thereby ensuring good stability between the battery cells after they are connected through the poles, as a preferred technical solution, in another embodiment of this utility model, the height of the limiting groove A11 is H3, the height of the second connector section B2 is H2, and the height of the enclosure A1 is H1, wherein: 1 < H3 < 0.5H1, 0 ≤ H2 ≤ 0.5H1, and 1 mm < H1 < 30 mm.

[0062] In summary, the electrode structure proposed in this utility model achieves a stable, secure, and quick connection between battery cell electrodes through the combination of a plug and a connector. This not only improves the connection stability between the positive and negative electrodes but also reduces the process difficulty and cost of battery cell integration, which helps to improve the efficiency of battery cell assembly. It also facilitates the disassembly and maintenance of individual batteries, thereby reducing maintenance costs.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions, and variations to the above embodiments within the scope of the present invention. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

Claims

1. A plug-in pole structure, characterized in that: Includes a socket (A) and a connector (B); The plug-in socket (A) includes a base plate (A3) and a enclosure (A1). The enclosure (A1) is disposed on the outer periphery of the base plate (A3) and forms a plug-in cavity with the base plate (A3) closed at one end and open at the other end. Several limiting grooves (A11) are provided on the enclosure (A1), and several elastic connectors (A4) are vertically fixed on the base plate (A3). The connector (B) includes a connector body, which has a plurality of holes (B21) vertically opened along its height direction, and a plurality of extrusion members (B3) elastically and telescopically connected to the outer periphery of the connector body. The structure of the connector body matches the structure of the connector cavity, the number and structure of the elastic connector (A4) match the number of the socket (B21), and the number and structure of the pressing member (B3) match the number of the limiting groove (A11). After the connector body is inserted into the connector cavity, the elastic connector (A4) is located in the socket (B21) and the pressing member (B3) is engaged in the limiting groove (A11).

2. The plug-in pole structure according to claim 1, characterized in that: Several elastic connectors (A4) are evenly and symmetrically distributed on the base plate (A3), and several sockets (B21) are evenly and symmetrically distributed on the connector body.

3. The plug-in pole structure according to claim 1, characterized in that: The connector body includes a first connector segment (B1) and a second connector segment (B2). The socket (B21) is a through hole that is perpendicularly opened along the height direction of the first connector segment (B1) and the second connector segment (B2). A stepped structure is formed at the connection between the first connector segment (B1) and the second connector segment (B2). A first engaging step (A2) is provided at the bottom of the connector cavity. The stepped structure matches the structure of the first engaging step (A2).

4. The plug-in pole structure according to claim 1, characterized in that: The elastic connector (A4) includes a large plug post (A41), a small plug post (A42), and a coil spring (A43). The small plug post (A42) is fixedly connected to the upper end face of the large plug post (A41). The coil spring (A43) is sleeved on the small plug post (A42) and one end is fixedly connected to the upper end face. The lower end face of the large plug post (A41) is fixedly connected to the base plate (A3).

5. The plug-in pole structure according to claim 4, characterized in that: The connection between the large plug post (A41) and the small plug post (A42) forms a stepped structure, and a second engaging step (B22) is provided in the socket (B21). The stepped structure matches the structure of the second engaging step (B22).

6. The plug-in pole structure according to claim 1, characterized in that: The enclosure (A1) has four strip-shaped limiting grooves (A11) evenly spaced, and four extrusion members (B3) are provided corresponding to the four limiting grooves (A11).

7. The plug-in pole structure according to claim 1, characterized in that: The upper surface of the extrusion (B3) is a smooth arc or slope.

8. The plug-in pole structure according to claim 3, characterized in that: The base plate (A3) has a circular structure, the first engaging step (A2) has a ring structure, and the connector body has a cylindrical structure. The outer diameters of the enclosure (A1), the first engaging step (A2), and the base plate (A3) are D1, D2, and D3 respectively, and D1, D2, and D3 satisfy: 10mm < D3 < D2 < D1 < 250mm.

9. The plug-in pole structure according to claim 3, characterized in that: The height of the limiting groove (A11) is H3, the height of the second insertion section (B2) is H2, and the height of the enclosure (A1) is H1, wherein: 1 < H3 < 0.5H1, 0 ≤ H2 ≤ 0.5H1, and 1 mm < H1 < 30 mm.

10. The plug-in pole structure according to claim 8, characterized in that: The wall thickness of the enclosure (A1) is T1, and the length of the limiting groove (A11) is L1. T1 and L1 satisfy: 1mm≤T1<5mm, 1mm<L1<250mm.

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