Plug and battery pack

Abstract

The utility model relates to the field of application connection of battery packs, and discloses a plug and a battery pack. The plug comprises an insulating base, the front end of the insulating base is provided with two separated insulating tube parts extending out of the front end face of the insulating base, the front end face tube openings of the two insulating tube parts and the tube cavities of the two insulating tube parts axially and backwards extend to the rear end of the insulating base, and two rear end sockets are formed in the rear end of the insulating base; the two metal pieces are fixed in the two pipe cavities of the insulating base respectively, the front ends of the two metal pieces are metal pipes with pipe openings facing forwards, the two metal pipes are located in the two insulating pipes respectively, a preset gap is formed between the outer wall of each metal pipe and the inner wall of the pipe cavity of the insulating pipe part where the metal pipe is located, and wiring parts are arranged at the rear ends of the two metal pieces respectively; and the rear ends of the two metal pieces are respectively positioned in the rear end sockets at the rear end of the insulating base. The application of the technical scheme is beneficial to the universality of the plug.

Description

Technical Field

[0001] The utility model relates to the application connection field of lithium ion batteries, in particular to a plug and a battery pack. Background Art

[0002] As lithium-ion battery devices are increasingly used, people's requirements for the connection devices between lithium-ion batteries and devices are gradually increasing, and the requirements are becoming more and more flexible. The inventors found in the process of conducting research on the utility model that the specifications of the male and female plugs of battery packs on the market are fixed combination matching plugs. The corresponding male plug can only be used with the female plug alone, and the versatility is not strong. The male plug cannot match other specifications and models of female plugs. When circuit conversion is required, people achieve it by welding wires between different plugs. The inventors found that welding wires have defects such as large volume and inconvenience in carrying. Summary of the invention

[0003] One of the purposes of the embodiments of the utility model is to provide a plug and a lithium-ion battery pack, and the application of the technical solution is beneficial to the versatility of the plug.

[0004] In a first aspect, an embodiment of the present utility model provides a plug, comprising:

[0005] An insulating base, wherein the front end of the insulating base is two separated insulating tube parts extending from the front end surface of the insulating base, the front end surface tube openings of the two insulating tube parts, the tube cavities of the two insulating tube parts axially extend backward to the rear end of the insulating base, and two rear end plugs are formed at the rear end of the insulating base;

[0006] Two metal pieces are respectively fixed in the two cavities of the insulating base.

[0007] The front ends of the two metal parts are metal tubes with the tube openings facing forward. The two metal tubes are respectively located in the two insulating tubes. The outer wall of each metal tube has a predetermined gap with the inner wall of the tube cavity of the insulating tube part where it is located.

[0008] The rear ends of the two metal parts are respectively provided with wiring parts, and the rear ends of the two metal parts are respectively located in the rear end sockets at the rear end of the insulating base.

[0009] Optionally, a lead-in section is further provided in the middle of each of the metal parts, and along the axial direction from front to back, the outer diameter of the lead-in section gradually increases from the outer diameter of the metal tube as an initial value to a predetermined value.

[0010] The metal part is also provided with a positioning groove section whose outer diameter is smaller than the outer diameter of the introduction section, and the positioning groove section is located at the rear end of the introduction section;

[0011] A protrusion protruding from the inner wall of the lumen is respectively provided in each lumen of the insulating base;

[0012] When the metal part is fixed in the lumen, the protrusion of the insulating base is limited in the positioning groove section of the metal part, the introduction section of the metal part is limited at the front end of the protrusion, and the metal part is limited and fixed in the lumen.

[0013] Optionally, the rear end surface of the positioning groove section of the metal component is located behind the rear end surface of the protrusion of the insulating base, and the metal component is fixed in the tube cavity.

[0014] Optionally, the section between the metal tube and the wiring portion of the metal piece is a solid metal piece.

[0015] Optionally, at least one anti-slip portion is provided on the outer surface of the insulating base, and the anti-slip portion is raised and / or recessed relative to the outer surface of the insulating base.

[0016] Optionally, an axially extending anti-reverse insertion portion is further provided on the outer surface of at least one of the insulating tube portions, and the anti-reverse insertion portion is protruding or recessed on the outer surface of the insulating tube portion.

[0017] Optionally, an anti-reverse insertion portion extending axially is further provided on the outer surface of at least one of the insulating tube portions, and the anti-reverse insertion portion is protruding or recessed on the outer surface of the insulating tube portion.

[0018] Optionally, a connection reinforcement portion is provided on the front end surface of the insulating base, and the connection reinforcement portion is protruding or recessed on the front end surface of the insulating base to match the recessed or raised portion of the end surface of the plug-in to be connected.

[0019] Optionally, the two insulating tube parts have different shapes.

[0020] In a second aspect, an embodiment of the present invention provides a lithium-ion battery pack, comprising:

[0021] The lithium-ion battery pack has a discharge wire connected to the positive and negative electrodes.

[0022] In any of the above-mentioned plugs, the ends of the discharge wires extend from the wire inlet at the rear end of the plug and are connected to the rear end of the metal member located in the wire inlet.

[0023] As can be seen from the above, the rear end of the plug of this embodiment is electrically connected to the positive and negative wires of the power supply, and the two insulating tube parts at the front end of the plug are separated, and the two insulating tube parts are metal tubes, and there is a gap between the outer wall of the metal tube and the inner wall of the tube cavity of the insulating tube part, so that the front end of the plug can be adapted to both a male plug and a female plug, for example:

[0024] If the currently adapted plug is a male plug, when the plug is used as a female plug, the conductor plug of the adapted male plug is inserted from the front end of the plug into the tube openings of the metal tubes of the two insulating tube parts, and the outer periphery of the conductor plug is tightly attached to the inner wall of the metal tube, thereby realizing the connection of the power supply, and the current discharged by the power supply is output to the electrical equipment connected to the male plug;

[0025] If the currently adapted plug is a female plug, when this plug is used as a male plug, the metal tube in the insulating tube part at the front end of the plug is inserted into the conductor plug tube of the female plug at the opposite end, and the tube wall of the conductor plug tube is tightly limited between the outer wall of the metal tube of the plug and the inner wall of the tube cavity of the insulating tube part, thereby realizing the connection of the power supply, and the current discharged by the power supply is output to the electrical equipment connected to the male plug.

[0026] In summary, the plug of this embodiment can be adapted to both male and female plugs at its front end, and the product has strong versatility, reduces accessories for connecting the power source, and is convenient for people to use. It is applied to battery packs, and improves the market competitiveness of battery pack products. Among them, the battery pack can be, but is not limited to, a lithium-ion battery pack. In addition, the plug of this embodiment has a simple structure and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute an improper limitation of the present invention.

[0028] Figure 1 A three-dimensional structural schematic diagram of a plug provided in Embodiment 1 of the utility model from one perspective;

[0029] Figure 2 for Figure 1 A three-dimensional structural schematic diagram of the plug from another perspective;

[0030] Figure 3 for Figure 1 The main structural diagram of the plug shown;

[0031] Figure 4 for Figure 1 A schematic diagram of the left side structure of the plug shown;

[0032] Figure 5 for Figure 4 AA cross-sectional structural diagram;

[0033] Figure 6 for Figure 5 Schematic diagram of the decomposition structure;

[0034] Figure 7 for Figure 1 A schematic diagram of the right side structure of the plug shown;

[0035] Figure 8 for Figure 1 A schematic diagram of the top view of the plug shown;

[0036] Fig. 9 for Figure 1 A schematic diagram of the structure of the plug as viewed from above;

[0037] Fig.10 for Figure 1 The schematic diagram of the assembly structure of the plug shown;

[0038] Fig.11 for Figure 1 The schematic diagram of the exploded structure of the plug shown when connected with other power connectors;

[0039] Fig.12 for Figure 1 The schematic diagram of the structure after the plug is connected with other power connectors.

[0040] 1: Insulation base; 11: Insulation tube; 12: Tube cavity; 13: Rear end socket;

[0041] 14: protrusion; 15: anti-slip part; 16: anti-reverse insertion part; 17: connection reinforcement part;

[0042] 2: Metal parts; 21: Metal pipe; 22: Wiring part; 23: Lead-in section;

[0043] 24: card slot segment; 25: interval. DETAILED DESCRIPTION

[0044] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Here, the illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. Example

[0045] See also Figure 1-12 shown.

[0046] This embodiment provides a plug, which is particularly suitable for being used as a power source plug.

[0047] The plug mainly includes an insulating base 1 and two metal parts 2. The insulating base 1 can be, but not limited to, a plastic base or a plastic shell, and can be, but not limited to, integrated injection molding. Injection molding is beneficial to improving the manufacturing efficiency of the plug and improving the dust and moisture resistance of the plug.

[0048] At the front end of the insulating base 1 are two insulating tubes 11 extending forward in the axial direction. The two insulating tubes 11 are located in front of the front end surface of the insulating base 1. The two insulating tubes 11 are separated from each other by a certain distance. The inside of the two insulating tubes 11 is a tube cavity 12. The front end tube opening of the tube cavity 12 is located at the front end of the two insulating tubes 11. The tube cavity 12 of the insulating tube 11 extends backward and penetrates the rear end of the insulating base 1. At the rear end of the insulating base 1, rear end sockets 13 connected to the tube cavity 12 are formed respectively to serve as the insertion port of the metal part 2 and the outlet of the power line connected to the rear end of the metal part 2. The power lines are connected to the positive and negative poles of the battery respectively to serve as the discharge line of the power supply.

[0049] The front end of each metal member 2 is a metal tube 21, and the mouth of the metal tube 21 is located at the front end of the metal tube 21. A wiring portion 22 is provided at the rear end of each metal member 2 to connect the power line, and the connection can be riveted or welded or other fixed connections. The wiring portion 22 can be, but not limited to, set as a concave position, or set as a tube that is easy to limit welding as shown in the figure, such as, but not limited to, the rear end of the tube is open, and the front end is closed, that is, it can be, but not limited to, as shown in the figure, there is a closed interval 25 between the metal tube 21 and the wiring portion 22 of the metal member 2.

[0050] One of the two metal pieces 2 is fixed in one lumen 12 of the insulating base 1 , and the other is fixed in the other lumen 12 of the insulating base 1 .

[0051] The metal tubes 21 at the front end of each metal member 2 are respectively located in the insulating tube portion 11 at the front end of the insulating base 1, and the outer wall of the metal tube 21 does not contact the inner wall of the tube cavity 12 of the insulating tube portion 11 where it is located, but has a predetermined gap d. As an illustration of this embodiment, the tube mouth of each metal tube 21 is located inside the tube mouth of the insulating tube portion 11 and does not extend out of the tube mouth of the insulating tube portion 11, so as to improve the electrical connection safety of the interface, that is, to improve the dust and moisture resistance of the metal tube 21, and improve the appearance consistency of the plug.

[0052] The rear end of each metal piece 2 is located in the rear end socket 13 of the tube cavity 12 where the metal piece 2 is located, but does not protrude from the rear end socket 13, and is located in the wire inlet at the rear end of its insulating base 1 to improve the appearance consistency of the plug.

[0053] During assembly, one of the metal parts 2 is the positive pole and the other is the negative pole. Power lines are welded at the rear ends of the two metal parts 2 to serve as the positive line and the negative line, respectively. The front end metal tube 21 of the metal part 2 faces forward, and the metal part 2 is inserted into the tube cavity 12 of the insulating base 1 from the rear end socket 13 of the insulating base 1, and the metal tube 21 at the front end of the metal part 2 is pushed into the insulating tube part 11 at the front end of the insulating base 1, and the rear end of the metal part 2 is pushed into the rear end socket 13 of the insulating base 1.

[0054] The positive and negative lines connected to the rear end of the metal member 2 come out from the two rear end sockets 13 of the insulating base 1 respectively, so as to be connected to a power source, wherein the power source can be but is not limited to a lithium-ion battery pack.

[0055] As can be seen from the above, the rear end of the plug of this embodiment is electrically connected to the positive and negative wires of the power supply, and the two insulating tube parts 11 at the front end of the plug are separated, and the metal tube 21 is inside the two insulating tube parts 11, and there is a gap d between the outer wall of the metal tube 21 and the inner wall of the tube cavity 12 of the insulating tube part 11, so that the front end of the plug can be adapted to both a male plug and a female plug, for example:

[0056] If the currently adapted plug is a male plug, when the plug is used as a female plug, the conductor plug of the adapted male plug is inserted from the front end of the plug into the tube openings of the metal tubes 21 of the two insulating tube parts 11, and the outer periphery of the conductor plug is tightly attached to the inner wall of the metal tube 21, so that the power supply is connected, and the current discharged by the power supply is output to the electrical equipment connected to the male plug;

[0057] If the currently adapted plug is a female plug, when this plug is used as a male plug, the metal tube 21 in the insulating tube part 11 at the front end of the plug is inserted into the conductor plug of the female plug at the opposite end, and the tube wall of the conductor plug is tightly limited between the outer wall of the metal tube 21 of the plug and the inner wall of the tube cavity 12 of the insulating tube part 11, thereby realizing the connection of the power supply, and the current discharged by the power supply is output to the electrical equipment connected to the male plug.

[0058] In summary, the plug of this embodiment has strong versatility, and its application is conducive to reducing the accessories for connecting the power source, making it convenient for people to use. When applied to battery packs, it is conducive to improving the market competitiveness of battery pack products. In addition, the plug of this embodiment has a simple structure and is easy to assemble.

[0059] This embodiment can use two metal parts 2 of the same structure to reduce the types of materials and facilitate production. The structure of the metal part 2 can be but is not limited to the following.

[0060] An introduction section 23 is provided in the axial middle part of the metal part 2. The outer diameter of the front end of the introduction section 23 is consistent with the outer diameter of the metal tube 21 at the front end of the metal part 2. From front to back along the axial direction, the outer diameter of the introduction section 23 takes the outer diameter of the metal tube 21 as the initial value and gradually increases to a predetermined value, forming a smooth introduction section 23.

[0061] A positioning groove section 24 is further provided on the rear end section of the metal member 2. The positioning groove section 24 is located at the rear end of the introduction section 23 and at the front end of the wiring portion 22. The outer diameter of the positioning groove section 24 is smaller than the outer diameter of the introduction section 23, preferably but not limited to smaller than the outer diameter of the wiring portion 22. In addition, the outer diameter of the wiring portion 22 is preferably larger than the outer diameter of the introduction section 23 to form a plurality of steps that can be attached to the end surface of the insulating base 1, so as to limit the front and rear axial displacement of the metal member 2 or the convenience, and avoid the plug plugging and unplugging operation affecting the structure of the plug. Damage.

[0062] Correspondingly, a protrusion 14 is respectively provided in the two cavities 12 of the insulating base 1 and extends on the inner wall of the cavity 12 where the protrusion 14 is located.

[0063] When assembling the plug, the metal part 2 is pushed into the tube cavity 12 from the rear end socket 13 of the insulating base 1. When pushed to a certain depth, the lead-in section 23 of the metal part 2 abuts against the protrusion 14 of the insulating base 1. Under the action of the thrust, the lead-in section 23 exerts a strong force on the protrusion 14, and the tube cavity 12 of the insulating base 1 undergoes elastic and recoverable deformation, and the tube cavity 12 expands outward, so that the lead-in section 23 moves further forward. When the rear end of the protrusion 14 section passes over the protrusion 14, the protrusion 14 recovers its deformation, and the tube cavity 12 returns to its natural state. At this time, the protrusion 14 of the insulating base 1 is limited in the positioning groove section 24 of the metal part 2, and the metal part 2 is in a positioning state. The assembly of the metal part 2 is completed, and the metal part 2 is fixed in the tube cavity 12 of the insulating base 1. At this time, the lead-in section 23 of the metal part 2 is located at the axial front end of the protrusion 14, and the metal tube 21 at the front end of the lead-in section 23 is located in the tube cavity 12 of the insulating tube part 11. As can be seen from the above, by adopting the metal member 2 and the insulating base 1 structure, the assembly of the plug is simple and convenient, which is conducive to improving the assembly efficiency.

[0064] As an illustration of this embodiment, the introduction section 23 of the metal part 2 can be set as an inclined introduction section 23, that is, the outer diameter of the introduction section 23 increases linearly along the axial direction from front to back. The processing is more convenient and the advancement of the metal part 2 is more time-saving and labor-saving, thereby improving work efficiency.

[0065] As an illustration of this embodiment, the axial length of the positioning groove section 24 of the metal component 2 is matched with the axial width of the protrusion 14 of the insulating base 1, so that the rear end face of the positioning groove section 24 of the metal component 2 is tightly attached to the rear end face of the protrusion 14 of the insulating base 1, and then they are face to face, so that the metal component 2 is more firmly and reliably limited in the tubular cavity 12 of the insulating base 1, and the plugging and unplugging of the plug is convenient.

[0066] As an illustration of this embodiment, an anti-slip portion 15 is further provided on the outer periphery of the insulating base 1. As shown in the figure, the anti-slip portion 15 can be designed to be raised relative to the outer surface of the insulating base 1, or can be designed to be recessed relative to the outer surface of the insulating base 1, or a combination of raised and recessed. One circle of anti-slip portions 15 can be provided on the outer periphery of the insulating base 1, or two or three circles of anti-slip portions 15 can be provided. The provision of the anti-slip portion 15 is conducive to facilitating user plugging and unplugging, specifically according to the outer periphery area of ​​the insulating base 1 and user convenience design.

[0067] An anti-reverse insertion portion 16 may also be provided on the outer surface of one or both of the two insulating tubes 11, and matched with the anti-reverse insertion portion 16 on the other plug-in to avoid reverse connection of the positive and negative poles and avoid power short circuit. For example, but not limited to, the anti-reverse insertion portion 16 may extend along the axial direction of the insulating tube 11. When plugging and unplugging, the anti-reverse insertion portion 16 may guide the direction of the plug connection, which is helpful to avoid the problem of loosening or displacement of the metal part 2 in the insulating base 1 due to unstable plugging direction, and is helpful to improve the convenience of user plugging and unplugging operations.

[0068] The anti-reverse insertion portion 16 is protruded or recessed into the outer surface of the edge tube portion. In this embodiment, a protruding strip extending along the axial direction is used as an example, but it is not limited thereto.

[0069] A connection reinforcement portion 17 is also provided on the front end surface of the insulating base 1. The connection reinforcement portion 17 is convex or concave relative to the front end surface of the insulating base 1 to match the concave or convex portion 14 of the end surface of the plug-in, further strengthening the stability of the connection between the plug and the plug-in to prevent the plug-in from being disengaged.

[0070] As an illustration of this embodiment, the two insulating tube parts 11 may be configured to have different shapes, but are not limited to the configuration.

[0071] As an illustration of this embodiment, the distance, shape, and specifications of the metal pieces 2 located at the two ends of the plug are matched with the power connectors of the predetermined equipment.

[0072] For example, the plug of this embodiment is an IEC plug, and it is assumed that the plug of this embodiment is compatible with an EC2 conversion plug and an IC2 conversion plug, but this embodiment is not limited to this.

[0073] As an illustration of this embodiment, the metal member 2 of this implementation may be, but is not limited to, a copper member.

[0074] As an illustration of this embodiment, positive “+” and negative “-” markings may also be provided on the outer surface (eg, top surface) of the insulating base 1 . The markings may be labels or marking structures that are raised or recessed on the outer surface.

[0075] Both ends of the metal member 2 of the plug of this embodiment are arranged in the tube cavity 12 of the insulating base 1. Compared with the scheme in which the metal member 2 is exposed, this embodiment has a safer structure, a more reliable connection, and a longer durability.

[0076] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. A plug, comprising: An insulating base, wherein the front end of the insulating base is two separated insulating tube parts extending from the front end surface of the insulating base, the front end surface tube openings of the two insulating tube parts, the tube cavities of the two insulating tube parts axially extend backward to the rear end of the insulating base, and two rear end plugs are formed at the rear end of the insulating base; Two metal pieces are respectively fixed in the two cavities of the insulating base. The front ends of the two metal parts are metal tubes with the tube openings facing forward. The two metal tubes are respectively located in the two insulating tubes. The outer wall of each metal tube has a predetermined gap with the inner wall of the tube cavity of the insulating tube part where it is located. The rear ends of the two metal parts are respectively provided with wiring parts, and the rear ends of the two metal parts are respectively located in the rear end sockets at the rear end of the insulating base.

2. The plug according to claim 1, characterized in that: A lead-in section is also provided in the middle of each metal part. In the axial direction and from front to back, the outer diameter of the lead-in section gradually increases from the outer diameter of the metal tube as an initial value to a predetermined value. The metal part is also provided with a positioning groove section whose outer diameter is smaller than the outer diameter of the introduction section, and the positioning groove section is located at the rear end of the introduction section; A protrusion protruding from the inner wall of the lumen is respectively provided in each lumen of the insulating base; When the metal part is fixed in the lumen, the protrusion of the insulating base is limited in the positioning groove section of the metal part, the introduction section of the metal part is limited at the front end of the protrusion, and the metal part is limited and fixed in the lumen.

3. The plug according to claim 2, characterized in that: The rear end surface of the positioning groove section of the metal component is located behind the rear end surface of the protrusion of the insulating base, and the metal component is fixed in the tube cavity.

4. The plug according to claim 2, characterized in that: The section between the metal tube and the connecting portion of the metal part is a solid metal part.

5. The plug according to any one of claims 1 to 4, characterized in that: At least one anti-slip portion is provided on the outer surface of the insulating base, and the anti-slip portion is raised and / or recessed relative to the outer surface of the insulating base.

6. The plug according to any one of claims 1 to 4, characterized in that: An axially extending anti-reverse insertion portion is also provided on the outer surface of at least one of the insulating tube portions, and the anti-reverse insertion portion is protruding or recessed on the outer surface of the insulating tube portion.

7. The plug according to any one of claims 1 to 4, characterized in that: An anti-reverse insertion portion extending in the axial direction is also provided on the outer surface of at least one of the insulating tube portions, and the anti-reverse insertion portion is protruding or recessed on the outer surface of the insulating tube portion.

8. The plug according to any one of claims 1 to 4, characterized in that: A connection reinforcement portion is provided on the front end surface of the insulating base, and the connection reinforcement portion is protruding or recessed on the front end surface of the insulating base to match the recessed or raised portion of the end surface of the plug-in to be connected.

9. The plug according to any one of claims 1 to 4, characterized in that: The two insulating tube parts have different shapes.

10. A battery pack, characterized in that: include: The battery pack body, the positive pole and the negative pole are connected to a discharge wire respectively. The plug according to any one of claims 1 to 9, wherein the ends of the discharge wires extend from the wire inlet at the rear end of the plug and are connected to the rear end of the metal member located in the wire inlet.

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