Plug, electric connector, battery pack and electric device

Abstract

The utility model provides a plug, an electric connector, a battery pack and an electric device. The plug is used for being plugged with a socket of the electric connector, the socket comprises a high-voltage jack terminal and low-voltage jack terminals, and the plug comprises a first shell, a high-voltage pin terminal and a plurality of low-voltage pin terminals. The high-voltage pin terminal and the plurality of low-voltage pin terminals are arranged in the first shell, the high-voltage pin terminal is used for being electrically connected with the high-voltage jack terminal, and the low-voltage pin terminals are used for being electrically connected with the low-voltage jack terminals. A first sealing gasket is arranged between the low-voltage pin terminal and the first shell, a plurality of first holes are formed in the first sealing gasket, the first holes are through holes and are provided with annular convex ribs, and the low-voltage pin terminal is arranged in the first holes. The first sealing gasket is further provided with a plurality of second holes, and the second holes are blind holes. When the first sealing gasket expands due to too high heat, the second hole can disperse expansion stress, the risk of permanent deformation of the annular convex rib in the first hole is reduced, and the sealing capacity of the first sealing gasket is further improved.

Description

Technical Field

[0001] This utility model relates to the field of connectors, specifically providing a plug, an electrical connector, a battery pack, and an electrical device. Background Technology

[0002] Short driving range is a major factor restricting the development of new energy vehicles, and consumers have severe range anxiety. In response to this situation, our company has launched a battery swapping solution, including building battery swapping stations, to address consumers' range anxiety and promote the development of pure electric new energy vehicles. The electrical connector between the battery pack and the vehicle body is a crucial component for enabling the battery swapping function.

[0003] Electrical connectors consist of a plug and a socket, which are plugged together to complete the electrical connection. Generally, electrical connectors for new energy vehicles consist of a plug that connects to the battery and a socket that connects to the vehicle. Battery packs with plugs can also be placed in battery swapping stations, where they can be charged and quickly swapped with the depleted battery pack in the vehicle.

[0004] The plug also contains multiple low-voltage pins, which are sealed to the plug housing. However, the seals on the multiple low-voltage pins and the plug housing are prone to failure, leading to abnormal electrical connections in the electrical connector and preventing the replacement battery pack from supplying power properly. Utility Model Content

[0005] To address the problem of abnormal electrical connection caused by seal failure between the low-voltage pin and the plug housing, this invention provides a plug for insertion into a socket of an electrical connector. The socket includes a high-voltage socket terminal and a low-voltage socket terminal. The plug includes a first housing, a high-voltage pin terminal, and multiple low-voltage pin terminals. Both the high-voltage pin terminal and the multiple low-voltage pin terminals are disposed within the first housing. The high-voltage pin terminal is used for electrical connection with the high-voltage socket terminal, and the low-voltage pin terminals are used for electrical connection with the low-voltage socket terminal. A first sealing gasket is provided between the low-voltage pin terminal and the first housing. The first sealing gasket has multiple first holes, which are through holes, and an annular rib is provided within each first hole. The low-voltage pin terminal is disposed within each first hole. The first sealing gasket also has multiple second holes, which are blind holes.

[0006] Because the plug and socket have high and low voltage terminals connected electrically, they generate a lot of heat. The first sealing gasket will expand due to excessive heat. The expanded first sealing gasket will excessively compress the low-voltage pin terminal, causing the annular rib to be permanently deformed and unable to achieve a seal. This application also provides the aforementioned second hole on the first sealing gasket. When the first sealing gasket expands, the stress is transferred to the second hole, thereby reducing the risk of permanent deformation of the annular rib in the first hole, further improving the sealing ability of the first sealing gasket, and ensuring normal electrical connection of the electrical connector.

[0007] In an optional technical solution of this utility model, the annular rib includes a first radius R1 and a second radius R2. The value of the second radius R2 minus the first radius R1 is the radial width of the annular rib. The outer radius of the low-voltage pin terminal is R3. R1, R2, and R3 satisfy: R3-R1>0.5(R2-R1). That is, the difference between the outer radius R3 of the low-voltage pin terminal and the radius R1 of the perforation on the annular rib is greater than half of the radial width of the annular rib. In this way, the annular rib can be subjected to sufficient compressive force to seal with the low-voltage pin terminal.

[0008] In an optional technical solution of this utility model, the distance D between the second hole and the first hole satisfies: 1.5mm ≥ D ≥ 0.6mm. The sealing of the first sealing gasket relies on its own elastic deformation. Setting the distance D between the second hole and the first hole within the above-mentioned value range allows the first sealing gasket to have sufficient deformation to meet the sealing capacity within the first hole, while the second hole can withstand the stress during expansion. The second hole is a blind hole located around the first hole, or the second hole is an annular blind hole surrounding the first hole, with the center of the annular blind hole being the same as that of the first hole.

[0009] In the optional technical solution of this utility model, the shape of the second hole is circular, rhomboid, or rectangular. A rectangular hole is easier to deform than a circular hole, thus releasing stress. A rhomboid hole can be designed with a larger area to release more stress, while also meeting the minimum distance requirement between it and the first hole through its positional design.

[0010] In an optional technical solution of this utility model, the first sealing gasket is provided with both a circular second hole and a diamond-shaped second hole.

[0011] In an optional technical solution of this utility model, N annular ribs, where N ≥ 1, are provided in the first hole along the thickness direction of the sealing gasket. The depth of the second hole is greater than the depth of the first annular rib. The depth of the second hole affects its stress-relieving ability; the greater the depth, the greater the stress-relieving ability. By setting the depth of the second hole to be greater than the depth of the first annular rib, the stress on at least one annular rib in the first hole can be reduced, thereby improving the sealing ability of the annular rib.

[0012] In an optional technical solution of this utility model, the depth of the second hole is greater than the depth of the (N-1)th annular rib. That is, the expansion stress of all N-1 annular ribs in the first hole can be shared by the second hole, ensuring that the N-1 annular ribs can normally perform their sealing function.

[0013] In an optional technical solution of this utility model, the depth of the second hole is greater than the depth of the Nth annular rib. That is, the depth of the second hole exceeds the depth of the lowest annular rib in the first hole. The second hole can share the expansion stress of all the annular ribs in the first hole, and all the annular ribs in the first hole can deform within an appropriate range to ensure their long-term sealing performance. The plug and socket can be plugged and unplugged multiple times.

[0014] In an optional technical solution of this utility model, the first sealing gasket is further provided with a third hole, and a filler is provided in the third hole. This first sealing gasket can adapt to the plug requirements of different low-voltage pin terminals. When the number of low-voltage pin terminals is small, the filler is left in the third hole. When the number of low-voltage pin terminals is large, the filler can be removed to serve as a through hole for the low-voltage pin terminals.

[0015] In an optional technical solution of this utility model, the low-voltage pin terminal includes a power pin and a signal pin, the diameter of the power pin being larger than the diameter of the signal pin; the first hole includes a power pin through hole and a signal pin through hole, the inner diameter of the power pin through hole being larger than the inner diameter of the signal pin through hole.

[0016] In an optional technical solution of this utility model, the plug further includes a low-voltage pin module. The low-voltage pin module includes a plurality of low-voltage pins, a second housing, and a third housing. The second housing and the third housing form a limiting structure to fix the plurality of low-voltage pins. The first sealing gasket is installed on the third housing, and the plurality of low-voltage pins pass sequentially through the third housing and the first sealing gasket. Thus, the low-voltage module can be installed as a single unit.

[0017] In an optional technical solution of this utility model, the second housing is provided with an elastic limiting member, and the low-voltage pin module is engaged with the first housing through the limiting member. Through the elastic limiting member, the low-voltage pin module can be quickly and easily installed onto the plug housing.

[0018] This utility model also provides an electrical connector, which includes the above-described plug.

[0019] This utility model also provides a battery pack, which includes the above-mentioned plug.

[0020] This utility model also provides an electrical device, which includes the aforementioned plug. Attached Figure Description

[0021] Figure 1 A perspective view of one embodiment of the plug;

[0022] Figure 2 This diagram illustrates the state where the plug and socket are not plugged in.

[0023] Figure 3 for Figure 1 A bottom view;

[0024] Figure 4 for Figure 1 Cross-sectional view;

[0025] Figure 5 for Figure 4 Enlarged view of the circled part;

[0026] Figure 6 This is a schematic diagram of a ring-shaped rib.

[0027] Figure 7 A perspective view of one embodiment of the first sealing gasket;

[0028] Figure 8 A schematic diagram of another embodiment of the first sealing gasket;

[0029] Figure 9 A schematic diagram of yet another embodiment of the first sealing gasket;

[0030] Figure 10 A 3D view of the low-voltage pin module;

[0031] Figure 11 This is a cross-sectional view of the plug.

[0032] Figure Labels

[0033] Plug 100;

[0034] First shell 110;

[0035] Base plate 111;

[0036] First annular wall 112;

[0037] High-voltage pin terminal 120;

[0038] Low-voltage pin terminal 130;

[0039] First sealing gasket 140;

[0040] First hole 141;

[0041] Circular rib 1411;

[0042] Second hole 142;

[0043] Third hole 143;

[0044] Guide column 150;

[0045] First guide post 151;

[0046] First contact segment 1511;

[0047] Second guide post 152;

[0048] Second contact segment 1521;

[0049] Limiting component 160;

[0050] Socket 200. Detailed Implementation

[0051] The following describes optional embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0052] In the description of this utility model, it should be understood that the terms "distance", "width", "thickness", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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 this utility model.

[0053] In the description of this utility model, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly defined.

[0054] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] To address the issue of abnormal electrical connections caused by seal failure between the low-voltage pins and the plug housing, such as... Figure 1As shown, this application provides a plug 100 and an electrical connector. The electrical connector includes a plug 100 and a socket 200, with the plug 100 for insertion into the socket 200. The socket 200 includes high-voltage and low-voltage terminals. The plug 100 includes a first housing 110, a high-voltage pin terminal 120, and a plurality of low-voltage pin terminals 130. The high-voltage pin terminal 120 and the plurality of low-voltage pin terminals 130 are disposed within the first housing 110. The high-voltage pin terminal 120 is used for electrical connection with the high-voltage terminal, and the plurality of low-voltage pin terminals 130 are used for electrical connection with the low-voltage terminal. Specifically, the first housing 110 includes a base plate 111 and a first annular wall 112 extending from the base plate 111. Both the high-voltage pin terminal 120 and the low-voltage pin terminal 130 are disposed within the space enclosed by the first annular wall 112. A first sealing gasket 140 is provided between the low-voltage pin terminal 130 and the first housing 110. The first sealing gasket 140 has multiple first holes 141, each a through hole. An annular rib 1411 is provided within each first hole 141, and the low-voltage pin terminal 130 is disposed within the first hole 141. It is understood that a sealing interface is formed between the low-voltage pin terminal 130 and the annular rib 1411, i.e., a seal is formed between the annular rib 1411 and the low-voltage pin terminal through appropriate deformation. Additionally, the first sealing gasket 140 also has multiple second holes 142, which are blind holes.

[0056] Because the plug 100 and socket have high and low voltage terminals connected, they generate a lot of heat. The first sealing gasket 140 will expand due to this excessive heat. The expanded first sealing gasket 140 will excessively compress the low-voltage pin terminal 130, causing permanent deformation of the annular rib 1411 and preventing it from achieving a seal. It is understandable that both the body of the first sealing gasket 140 and the annular rib 1411 will expand due to excessive heat, and a larger expansion of the first sealing gasket 140 body will also excessively compress the annular rib 1411, causing permanent deformation. This application also provides the aforementioned second hole 142 on the first sealing gasket 140. The stress from the expansion of the first sealing gasket 140 is transferred to the second hole 142, thereby reducing the risk of permanent deformation of the annular rib 1411 in the first hole 141, further improving the sealing ability of the first sealing gasket 140, and ensuring normal electrical connection of the electrical connector.

[0057] In optional embodiments of this application, such as Figure 1 and Figure 4 As shown, the plug 100 also includes a guide post 150, and the corresponding socket 200 includes a guide hole. The guide post 150 and guide hole allow for faster and more precise insertion of the pin terminals and socket terminals. Specifically, the height of the guide post 150 needs to be greater than the height of the high / low voltage pin terminals to ensure that the guide post 150 prioritizes insertion over the high / low voltage pin terminals, thus achieving the guiding function. Figure 1 As shown, this embodiment provides two guide posts. Specifically, the guide post 150 of the plug 100 includes a first guide post 151 and a second guide post 152, and the guide hole of the socket 200 includes a first guide hole and a second guide hole. The first guide post 151 includes a first contact segment 1511 for contacting the first guide hole, and the second guide post 152 includes a second contact segment 1521 for contacting the second guide hole. The length of the first contact segment 1511 is less than the length of the second contact segment 1521. The second guide post 152 acts as the main guide post, and the first guide post acts as the secondary guide post. By reducing the length of the first contact segment 1511, the insertion and extraction force between the guide post and the guide hole is reduced, making it easier to insert and remove the plug 100 and the socket 200.

[0058] In an optional embodiment of this application, the annular rib 1411 includes a first radius R1 and a second radius R2. As shown in the figure, the hole in the middle of the annular rib 1411 is for the low-voltage pin terminal to pass through, and the first radius R1 is the radius of this hole. The value of the second radius R2 minus the first radius R1 is the radial width of the annular rib 1411. The outer radius of the low-voltage pin terminal is R3, and R1, R2, and R3 satisfy: R3-R1 > 0.5(R2-R1).

[0059] In optional embodiments of this application, such as Figure 7 As shown, the distance D between the second hole 142 and the first hole 141 satisfies: 1.5mm ≥ D ≥ 0.6mm. The sealing function of the first sealing gasket 140 relies on its own elastic deformation, that is, through the elastic deformation of the body of the first sealing gasket and the annular rib 1411 in the first hole 141. If the distance between the second hole 142 and the first hole 141 is too small, the first sealing gasket 140 will not have enough elastic material to deform under stress, and therefore cannot generate sufficient elastic extrusion force, making it difficult to satisfy the sealing within the first hole 141. If the distance between the second hole 142 and the first hole 141 is too large, the second hole 142's ability to share the expansion stress on the periphery of the first hole 142 and the annular rib 1411 will be too small, making it difficult to solve the problem of permanent deformation of the annular rib 1411 or the material around the first hole. Setting the distance D between the second hole 142 and the first hole 141 within the above-mentioned value range allows the first sealing gasket 140 to have sufficient deformation to satisfy the sealing capacity within the first hole, while the second hole can also bear the stress during expansion. It is understood that the spacing D in this embodiment refers to the distance between the first hole and the nearest second hole. Specifically, D can be 0.6mm, 0.7mm, 0.9mm, 1mm, 1.2mm, or 1.5mm.

[0060] Specifically, the structure and location of the second hole can be modified and combined in the following ways. For example... Figure 6As shown, the second hole 142 can be arranged in an array with the first hole 141. The second hole 142 is located next to the first hole, or it can be located in the middle area of ​​the four first holes. Figure 7 and 8 As shown, the second hole 142 can also be configured to surround the first hole 141. For example, the second hole 142 can be an annular groove surrounding the first hole 141. This annular groove can be a closed annulus or a non-closed annulus. The distance D between the annular groove and the first hole satisfies: 1.5mm ≥ D ≥ 0.6mm.

[0061] Optional, such as Figure 7-9 As shown, the shape of the second hole 142 on the first sealing gasket 140 can be circular, rhomboid, or rectangular. It is understood that rhomboid and rectangular holes are polygonal holes, which are easier to deform and release stress than circular holes. Placing rhomboid holes around the arrayed first holes allows for maximizing their area, releasing more stress, while also ensuring a minimum spacing with the first holes through proper placement. Alternatively, as... Figure 7-9 As shown, the first sealing gasket 140 can have only one type of hole or multiple types of holes. For example, both circular and diamond-shaped second holes can be provided on the first sealing gasket simultaneously. Figure 9 As shown, a second annular hole surrounding the first hole and a second hole independently arranged around the first hole can also be provided on the first sealing gasket. It is understood that various combinations of structures and types are within the scope of protection of this application.

[0062] In optional embodiments of this application, such as Figure 5 As shown, along the thickness direction of the first sealing gasket 140, N annular ribs 1411 are provided in the first hole 141, where N ≥ 1. The depth of the second hole 142 is greater than the depth of the first annular rib. The depth of the second hole 142 affects its stress-relieving ability; the greater the depth, the greater the stress-relieving ability. By setting the depth of the second hole 142 to be greater than the depth of the first annular rib, the stress on at least one annular rib in the first hole 141 can be reduced, thereby improving the sealing ability of the annular rib.

[0063] In optional embodiments of this application, such as Figure 5 As shown, the depth of the second hole 142 is greater than the depth of the (N-1)th (i.e., the second to last) annular rib. This means that the expansion stress of all N-1 annular ribs in the first hole can be shared by the second hole, ensuring that the N-1 annular ribs can perform their sealing function normally. Optionally, the depth of the second hole 142 is greater than the depth of the Nth annular rib, meaning the depth of the second hole 142 exceeds the depth of the lowest annular rib in the first hole 141. Figure 5In the illustrated embodiment, two annular ribs 1411 are provided in the first hole 141, and the depth of the second hole 142 exceeds the depth of the second annular rib. Therefore, the second hole 142 can share the expansion stress of all the annular ribs in the first hole 141, and all the annular ribs in the first hole 141 can deform within an appropriate range to ensure their long-term sealing performance. The plug and socket can be inserted and removed multiple times.

[0064] In an optional embodiment of this application, a third hole 143 is further provided on the first sealing gasket 140, and a filler is provided inside the third hole 143. Such a first sealing gasket 140 can adapt to the needs of plugs containing different low-voltage pin terminals. When the number of low-voltage pin terminals is small, the filler remains inside the third hole 143. When the number of low-voltage pin terminals is large, the filler can be removed to serve as a through hole for the low-voltage pin terminals. Specifically, the low-voltage pin terminal 130 includes a power pin and a signal pin, with the diameter of the power pin being larger than the diameter of the signal pin; the first hole includes a power pin through hole and a signal pin through hole, with the inner diameter of the power pin through hole being larger than the inner diameter of the signal pin through hole. Figure 6 As shown, four power pin holes are provided at the edge of the first sealing gasket, and multiple signal pin holes are provided at the center.

[0065] In optional embodiments of this application, such as Figure 10 and Figure 11 As shown, the plug 100 also includes a low-voltage pin module, which includes multiple low-voltage pins 130, a second housing, and a third housing. The second and third housings form a limiting structure to fix the multiple low-voltage pins 130. A first sealing gasket 140 is installed on the third housing, and the multiple low-voltage pins 130 pass through the third housing and the first sealing gasket in sequence. In this way, the low-voltage module can be installed as a whole. A flexible limiting member 160 is provided on the second housing, and the low-voltage pin module is engaged with the first housing 110 through the limiting member 160. By providing the flexible limiting member 160, the low-voltage pin module can be quickly and easily installed onto the plug housing.

[0066] This application also provides a battery pack that includes the aforementioned plug 100.

[0067] This application also provides an electrical device including the aforementioned plug 100. This electrical device can be, but is not limited to, a mobile phone, tablet, laptop, electric toy, power tool, electric vehicle, electric car, ship, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0068] The technical solution of this utility model has been described in conjunction with the optional embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A plug for mating with a socket of an electrical connector, the socket comprising a high voltage socket terminal and a low voltage socket terminal, characterised in that, The plug comprises: a first shell; a high-voltage pin terminal arranged in the first shell, the high-voltage pin terminal being used for electrical connection with the high-voltage socket terminal; a plurality of low-voltage pin terminals arranged in the first shell, the low-voltage pin terminals being used for electrical connection with the low-voltage socket terminals; a first sealing gasket is arranged between the low-voltage pin terminals and the first shell, the first sealing gasket is provided with a plurality of first holes, the first holes are through holes, annular ribs are arranged in the first holes, and the low-voltage pin terminals are arranged in the first holes; the first sealing gasket is also provided with a plurality of second holes, and the second holes are blind holes.

2. The plug of claim 1, wherein, The annular rib comprises a first radius R1 and a second radius R2, the value of the second radius R2 minus the first radius R1 is the width of the annular rib in the radial direction, the outer radius of the low-voltage pin terminal is R3, and R1, R2 and R3 satisfy: R3-R1>0.5(R2-R1).

3. The plug of claim 1, wherein, The distance D between the second hole and the first hole satisfies: 1.5mm≥D≥0.6mm.

4. The plug of claim 3, wherein, The shape of the second hole is circular or rhombic.

5. The plug of claim 4, wherein, The first sealing gasket is provided with circular second holes and rhombic second holes.

6. The plug of claim 1, wherein, Along the thickness direction of the sealing gasket, N annular ribs are arranged in the first hole, N≥1, and the depth of the second hole is greater than the depth of the first annular rib.

7. The plug of claim 6, wherein, The depth of the second hole is greater than the depth of the N-1th annular rib.

8. The plug of claim 7, wherein, The depth of the second hole is greater than the depth of the Nth annular rib.

9. The plug of claim 3, wherein, The second hole is a blind hole arranged on the periphery of the first hole, or the second hole is an annular blind hole arranged around the first hole.

10. The plug of claim 1, wherein, The first sealing gasket is also provided with a third hole, and a filler is arranged in the third hole.

11. The plug of claim 1, wherein, The low-voltage pin terminal comprises a power pin and a signal pin, and the diameter of the power pin is greater than the diameter of the signal pin. The first hole comprises a power pin hole and a signal pin hole, and the inner diameter of the power pin hole is greater than the inner diameter of the signal pin hole.

12. The plug of claim 1, wherein, The plug further comprises a low-voltage pin module, the low-voltage pin module comprises the plurality of low-voltage pins, a second shell and a third shell, the second shell and the third shell form a limiting structure to fix the plurality of low-voltage pins, the first sealing gasket is installed on the third shell, and the plurality of low-voltage pins pass through the third shell and the first sealing gasket in sequence.

13. The plug of claim 12, wherein, The second shell is provided with an elastic limiting piece, and the low-voltage pin module is clamped with the first shell through the limiting piece.

14. An electrical connector, characterized by The plug comprises a socket and the plug as claimed in any one of claims 1 to 13.

15. A battery pack, characterized by The plug comprises the plug as claimed in any one of claims 1 to 13.

16. An electrical device, comprising: The plug comprises the plug as claimed in any one of claims 1 to 13.

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