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. The plug comprises a first shell, the first shell comprises a bottom plate and a first annular wall connected with the bottom plate, a first containing cavity is defined by the first annular wall, and an annular groove is formed in the outer surface of the first annular wall. The plug further comprises a pin terminal, and the pin terminal is arranged in the accommodating cavity. The plug further comprises a sealing ring, and the sealing ring is arranged in the annular groove and used for being connected with the socket in a sealed mode. The distance D1 from the bottom of the annular groove to the bottom plate is larger than or equal to 5mm and smaller than or equal to 7.7 mm. The distance D1 between the annular groove for installing the sealing ring and the plug bottom plate is set in the numerical range, after the plug is connected to the battery pack, the sealing ring on the plug can be completely exposed relative to a box body of the battery pack, sand and stone cannot be accumulated on the surface of the sealing ring, reliable sealing can be achieved after the plug and the socket are connected in an inserted mode, and then reliable electric connection can be guaranteed.

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] Electrical connectors act as a connecting bridge, serving as essential basic components for a complete system and playing a vital role in electrical equipment. As the application fields of electrical equipment expand, the application environments of electrical connectors also broaden, for example, in new energy vehicles.

[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] When plugging and socketing, the plug and socket must be sealed. Generally, a sealing ring is installed on the outside of the plug. However, sand and gravel often get stuck between the plug and socket, resulting in poor sealing and causing the plug and socket to be unable to make a proper electrical connection. Utility Model Content

[0005] To address the problem of poor sealing between plugs and sockets in existing technologies, this utility model provides a plug for insertion into a connector socket. The plug includes a first housing, which comprises a base plate and a first annular wall connected to the base plate. The first annular wall forms a first receiving cavity, and an annular groove is provided on the outer surface of the first annular wall. The plug also includes pin terminals disposed within the receiving cavity. Furthermore, the plug includes a sealing ring disposed in the annular groove for sealing with the socket. The distance between the bottom of the annular groove and the base plate is D1, satisfying: 5mm ≤ D1 ≤ 7.7mm.

[0006] The distance D1 between the annular groove for installing the sealing ring and the bottom plate of the plug is set within the above-mentioned range. When the plug is connected to the battery pack, the sealing ring on the plug can be completely exposed, and sand and gravel will not accumulate on the surface of the sealing ring. The plug and socket can achieve reliable sealing after being plugged in, thereby ensuring reliable electrical connection.

[0007] In an optional technical solution of this utility model, the sealing ring includes a first sealing part and a second sealing part. The first sealing part is a hollow cylindrical shape and is fitted onto the inner wall of the annular groove. The second sealing part extends radially from the bottom of the first sealing part and fits against the bottom of the annular groove. When the socket and plug are inserted, the gaps between the inner wall and end wall of the second annular wall of the socket and the plug are sealed by the first sealing part and the second sealing part, respectively, which enhances the sealing effect compared to sealing a single part. The surface of the first sealing part is provided with multiple protrusions, which can improve the sealing effect between the inner wall of the second annular wall and the plug.

[0008] This utility model also provides an electrical connector, which includes a socket and the aforementioned plug. The socket includes a second housing, and the second housing includes a second annular wall. The second annular wall forms a second receiving cavity, and a socket terminal is provided in the second receiving cavity. The socket terminal and the aforementioned pin terminal are inserted into each other, and the second annular wall is sealed to the aforementioned sealing ring.

[0009] This utility model also provides a battery pack, which includes a housing, individual battery cells disposed within the housing, and a plug. The plug is electrically connected to and fixed within the housing, and all sealing rings are located outside the housing. By ensuring all sealing rings are outside the housing, sand and gravel will not accumulate on their surface, particularly on the second sealing portion. If the sealing rings are not entirely outside the housing, sand and gravel will enter the second annular wall of the socket and the sealing ring, affecting the seal. Furthermore, sand and gravel will accumulate on the radially extending second sealing portion, preventing the second annular wall from being fully inserted. When the socket cannot be fully inserted, the plug and socket will not properly mate, leading to seal failure and improper connection between the pin terminals and the socket terminals, thus affecting the electrical connection.

[0010] In the optional technical solution of this utility model, the distance D2 from the sealing ring to the housing satisfies: 1.5mm≤D2≤4.7mm.

[0011] This utility model also provides an electrical device, which includes the aforementioned battery pack and socket. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the plug and socket of an electrical connector;

[0013] Figure 2 and Figure 3 This is a diagram of the plug;

[0014] Figure 4 It is a cross-sectional view of the plug and socket in the plugged-in state;

[0015] Figure 5This is a diagram showing the plug being installed on the battery pack;

[0016] Figure 6 It is a cross-sectional view of the plug installed on the battery pack.

[0017] Figure Labels

[0018] Plug 100;

[0019] First shell 110;

[0020] Base plate 111;

[0021] First annular wall 112;

[0022] Annular groove 1121;

[0023] Pin terminal 120;

[0024] 130 sealing ring;

[0025] First sealing part 131, second sealing part 132;

[0026] Socket 200;

[0027] Second housing 210;

[0028] Third housing 220;

[0029] Second annular wall 221;

[0030] Inner wall 2211, end wall 2212;

[0031] Floating seal 230;

[0032] Battery pack 300;

[0033] Box 310;

[0034] Mounting plate 400. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] like Figures 1 to 6 To address the problem of poor sealing between plugs and sockets in the prior art, this utility model provides a plug 100 and an electrical connector including the plug 100. The plug is used to connect to a socket 200 of the connector. The plug 100 includes a first housing 110, which includes a base plate 111 and a first annular wall 112 connected to the base plate 111. The first annular wall 112 forms a first receiving cavity, and an annular groove 1121 is provided on the outer surface of the first annular wall 112. The plug 100 also includes a pin terminal 120 disposed within the receiving cavity. The plug 100 further includes a sealing ring 130 disposed within the annular groove 1121, which is used for a sealed connection with the socket 200. The distance D1 from the bottom of the annular groove 1121 to the base plate 111 satisfies the condition: 5mm ≤ D1 ≤ 7.7mm. Specifically, D1 can be 5mm, 5.5mm, 6mm, 7mm, or 7.7mm.

[0040] The distance D1 between the annular groove 1121 of the sealing ring 130 and the plug base plate 111 is set within the above-mentioned range. When the plug 100 is connected to the battery pack, the sealing ring 130 on the plug 100 can be completely exposed relative to the battery pack housing. Sand and gravel will not accumulate on the surface of the sealing ring 130. After the plug 100 and the socket 200 are plugged in, a reliable seal can be achieved, thereby ensuring a reliable electrical connection.

[0041] like Figure 1 and Figure 4As shown, specifically, the socket 200 includes a second housing 210 and a third housing 220, with the second housing 210 surrounding the third housing 220. The third housing 220 includes a second annular wall 221, which forms a second receiving cavity. A socket terminal is provided within the second receiving cavity; the socket terminal and the pin terminal 120 are inserted and electrically connected. The second annular wall 211 is sealed to the sealing ring 130 of the plug 100. Specifically, the socket also includes a Z-axis floating plate and an XY-axis floating plate. The XY-axis floating plate is fixedly connected to the third housing, and the XY-axis floating plate and the third housing are integrally attached to the Z-axis floating plate. A Z-axis extending spring is connected between the Z-axis floating plate and the second housing 210, allowing the Z-axis floating plate, the XY-axis floating plate, and the third housing to float in the Z-axis direction. The XY-axis floating plate is connected to the second housing or the Z-axis floating plate via an XY-axis extending spring, so the XY-axis floating plate and the third housing can float in the XY direction as a whole. In summary, the third housing 220 and the second housing 210 are floatably connected, meaning the third housing 220 can float relative to the second housing 210 in three dimensions, allowing the socket terminals to float in three dimensions and connect with the pin terminals 120. Furthermore, to achieve a seal between the second housing 210 and the third housing 220, floating seals 230 are provided at both the insertion end and the tail end of the socket 200, and between the third housing 220 and the second housing 210.

[0042] In optional embodiments of this utility model, such as Figure 2-4 As shown, the sealing ring 130 includes a first sealing part 131 and a second sealing part 132. The first sealing part 131 is a hollow cylindrical shape and is fitted onto the inner wall of the annular groove 1121. The second sealing part 132 extends radially from the bottom of the first sealing part 131 and fits against the bottom of the annular groove 1121. When the socket 200 and the plug 100 are plugged in, the gaps between the inner wall 2211 and the end wall 2212 of the second annular wall 221 of the socket 200 and the plug 100 are sealed by interference fit with the first sealing part 131 and the second sealing part 132, respectively, which enhances the sealing effect compared to sealing a single part. The surface of the first sealing part 131 is provided with multiple protrusions, which can improve the sealing effect between the inner wall 2211 of the second annular wall 221 and the plug.

[0043] like Figure 5 and 6As shown, this utility model also provides a battery pack and an electrical device containing the battery pack. The battery pack is provided with a plug 100, and the electrical device without the battery pack is provided with a socket. The battery pack is installed through the electrical connection between the plug 100 and the socket 200, and is the power source for the electrical device. The battery pack includes a housing 310 and battery cells and plug 100 disposed within the housing 310. The plug 100 is electrically connected to the battery cells and fixed inside the housing 310, and the sealing rings 130 are all located outside the housing 310. If the sealing ring is located inside the housing, sand and gravel cannot be discharged smoothly and will accumulate inside the housing and on the surface of the sealing ring 130. Sand and gravel may be trapped between the inner wall 2211 of the second annular wall and the first sealing part 131, leading to poor sealing. Sand and gravel may also accumulate between the end wall 2212 of the second annular wall and the radially extending second sealing part 132, leading to poor sealing or even preventing the second annular wall from being fully inserted. Consequently, the insertion action of the socket terminal toward the pin terminal cannot be fully moved, and the pin terminal and the socket terminal cannot be properly electrically connected. By setting the sealing ring 130 entirely outside the housing 310, sand and gravel will not accumulate on the surface of the sealing ring. This ensures a reliable seal between the inner wall 2211 of the second annular wall 221 and the first sealing part 131, and also prevents sand and gravel accumulation on the second sealing part from causing the end wall 2212 of the second annular wall 221 to be fully inserted and sealed with the second sealing part 132. This ensures that the socket terminal moves into place and completes the electrical connection with the pin terminal 120. There are three ways to electrically connect the pin terminal 120 and the socket terminal. The first way is to install an electrical connector on the pin terminal 120; the second way is to install an electrical connector inside the socket terminal; and the third way is to install electrical connectors on both the pin terminal 120 and the socket terminal. For example, a beveled spring (i.e., an electrical connector) can be embedded in the metal inner wall of the socket terminal. After the pin terminal 120 is inserted, it is electrically connected to the socket terminal by compressing the beveled spring. Furthermore, the distance D2 from the sealing ring 130 to the housing 310 can satisfy 1.5mm ≤ D2 ≤ 4.7mm. Specifically, D2 can be 1.5mm, 2mm, 2.5mm, 3mm, 4mm, or 4.7mm. Furthermore, D2 can satisfy 2.5mm ≤ D2 ≤ 4mm. The connection method between the battery pack and the electrical device is not limited. Installation can also be performed with the aid of auxiliary tools, such as fixing it using a mounting plate 400. By setting the distance D2 between the sealing ring 130 and the housing 310 within the aforementioned range, it can be ensured that the sealing ring 130 is completely exposed relative to the mounting plate 400 (auxiliary tool), thus preventing the accumulation of sand and gravel. It is understood that installation using the mounting plate 400 is just one method; it is also possible to install it without the mounting plate.

[0044] The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, 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.

[0045] 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 connector socket, characterized in that, The plug includes: A first housing, the first housing includes a bottom plate and a first annular wall connected to the bottom plate, the first annular wall surrounds a first receiving cavity, and the outer surface of the first annular wall is provided with an annular groove; Pin terminals, wherein the pin terminals are disposed within the receiving cavity; and A sealing ring is disposed in the annular groove and is used to seal with the socket; The distance between the bottom of the annular groove and the base plate is D1 and satisfies: 5mm≤D1≤7.7mm.

2. The plug as claimed in claim 1, characterized in that, The sealing ring includes a first sealing part and a second sealing part. The first sealing part is sleeved on the inner wall of the annular groove, and the second sealing part is fitted to the bottom of the annular groove.

3. The plug as described in claim 2, characterized in that, The surface of the first sealing part is provided with multiple protrusions.

4. An electrical connector, characterized in that, The device includes a socket and the plug as described in claim 1; the socket includes a second housing, the second housing includes a second annular wall, the second annular wall surrounds a second receiving cavity, and a socket terminal is provided in the second receiving cavity; the socket terminal and the pin terminal are inserted into each other, and the second annular wall is sealed with the sealing ring.

5. The electrical connector as described in claim 4, characterized in that, The sealing ring includes a first sealing part and a second sealing part. The first sealing part is sleeved on the inner wall of the annular groove, and the second sealing part is fitted to the bottom of the annular groove. The inner wall of the second annular wall is press-fitted with the first sealing part, and the top end of the second annular wall is press-fitted with the second sealing part.

6. The electrical connector as claimed in claim 5, characterized in that, The surface of the first sealing part is provided with multiple protrusions.

7. A battery pack, characterized in that, The battery pack includes a housing and individual battery cells disposed within the housing. The battery pack also includes a plug as described in any one of claims 1 to 3, wherein the plug is electrically connected to the individual battery cells and fixed within the housing, and all sealing rings are located outside the housing.

8. The battery pack as described in claim 7, characterized in that, The distance D2 from the sealing ring to the housing satisfies: 1.5mm≤D2≤4.7mm.

9. The battery pack as described in claim 8, characterized in that, The distance D2 from the sealing ring to the housing satisfies: 2.5mm≤D2≤4mm.

10. An electrical device, characterized in that, The electrical device includes a battery pack as described in any one of claims 8-9.

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