Plug and socket for electric vehicle charging
By designing a conical insert head and insertion hole, and adopting a single-wire structure, the problems of small contact area, high resistance, and inconvenient operation of existing plugs and sockets are solved. This achieves high current conduction while reducing weight and improving flexibility and heat dissipation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 孟祥厚
- Filing Date
- 2026-05-15
- Publication Date
- 2026-07-24
AI Technical Summary
Existing plugs and sockets have small contact areas, high resistance, are inconvenient to insert and remove manually, are heavy, have poor flexibility, and poor heat dissipation, especially when charging with high current.
It features a conical insert head and insertion hole, a single-wire design to increase contact area and reduce resistance, and a tight fit with the ejector lever, making it suitable for both single-wire and multi-wire sockets.
While achieving high current conduction, it reduces weight and resistance, improves flexibility and heat dissipation, and enhances the convenience of plugging and unplugging operations.
Smart Images
Figure CN122456261A_ABST
Abstract
Description
Technical Field
[0001] This invention pertains to electric vehicle charging technology and is used for the connection between electric vehicles and charging devices. Background Technology
[0002] In existing plugs and sockets, the plug for the main circuit electrical contact is cylindrical with a protruding tongue on the insertion hole. The tongue provides a tight fit, and there is a certain travel distance when inserting or removing the plug.
[0003] In existing plugs and sockets, the main circuit's outgoing and returning paths are all within one plug and socket, using sheathed wires (meaning the main circuit's outgoing and returning paths are in one wire).
[0004] The disadvantages of existing plugs and sockets are that they have a small contact area and high resistance.
[0005] The disadvantages of existing plugs and sockets are that, for currents above 200 amps, manual insertion and removal are far less convenient than single-wire plugs and sockets, they are twice as heavy, have poor flexibility, and poor heat dissipation. Summary of the Invention
[0006] The purpose of this invention is to design a conical plug and socket with a particularly large contact area and very low resistance; the weight of a single wire is reduced by half, flexibility is improved, and heat dissipation is enhanced.
[0007] The technical solution adopted by this invention to solve its technical problem is: using a conical insert head and a conical insert hole; using a single wire.
[0008] The beneficial effects of this invention are: the conical plug and socket have low resistance and can carry a large current; the weight of a single wire is reduced by half, and it has good flexibility and heat dissipation. Attached Figure Description
[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0010] Figure 1 This is a cross-sectional view of a conical plug and socket. Detailed Implementation
[0011] Figure 1 A plug with only one main circuit insertion head 1, or a socket with only one main circuit insertion hole 2, is called a single-wire plug and socket. If the main circuit insertion head 1 is conical, or the main circuit insertion hole 2 is conical, it is called a single-wire conical plug and socket.
[0012] Single-wire plugs and sockets can be either cylindrical or conical. Cylindrical plugs are the existing, widely used technology. The change to single-wire plugs is explained in text only, without diagrams, so everyone can easily master the technology. To complete a circuit connection, two or three sets of single-wire plugs and sockets are needed, while multi-wire connections require only one set.
[0013] Figure 1 The main circuit insertion head 1 of the plug is conical, or the main circuit insertion hole 2 of the socket is conical. Multiple conical insertion heads can be designed on a single plug, and multiple conical insertion holes can be designed on a single socket. This completes the connection of all circuits, or only the connection of the main circuit. Signal lines are cylindrical and use sheathed cables. Multi-wire conical plugs and sockets are only described in text; please refer to... Figure 1 Technicians can master the technology, so no diagrams were drawn.
[0014] Figure 1 The main circuit plug 1 can be a single plug on a single plug, or the main circuit plug 2 can be a single socket on a single socket. A single plug 1 can be used with one or more plug 1s; one is called a single-wire plug for single-wire connections, and multiple plug 1s are called multi-wire plugs for sheathed cables. Similarly, a single socket 2 can be used with one or more plug 2s; one is called a single-wire socket for single-wire connections, and multiple sockets are called multi-wire sockets for sheathed cables. Single-wire plugs and sockets require two or three sets to complete the circuit connection, while multi-wire connections require only one set.
[0015] Figure 1 The conical main circuit insert 1 has an ejector lever 3, or the conical main circuit insert hole 2 has an ejector lever 3. This means the ejector lever 3 can be designed on the plug or the socket. The ejector lever 3 can also be removed using a screw. When inserting the conical plug, a push is made; if it's not tight, the tightening device 5 will remove it, achieving a tight fit. The ejector lever 3 is required for removal, demonstrating its tightness. On a plug or socket, there is only one main circuit input wire 4 with a tapered fit. The advantages are a large contact area, tight fit, and low resistance. Morse taper is one option. Multiple single-wire sockets can be designed on a socket board for easy installation. This type of board with multiple sockets is also called a single-wire socket because it faces single-wire insertion, not simultaneous insertion of multiple main circuits. Single-wire plugs can avoid incorrect insertion by choosing different colors, different ports, reminder devices, detection alarms, and other technologies.
[0016] A single charging setup can have multiple output terminals, while an electric vehicle only needs one input terminal. Within a charging connection, there is one plug or socket for the sheathed cable, and two or three single-wire plugs or sockets for the main circuit. This is represented by two or three single-wire main circuit inserts (1) or two or three single-wire main circuit insertion holes (2). Simply put, an electric vehicle has one sheathed cable connection and two or three single-wire connection terminals. The operational method is to use the sheathed cable for normal charging, followed by high-current charging (flash charging), and then inserting the single wires. High-current charging must be done with a single wire. The optimal connection design is a combination of the sheathed cable and the main circuit single wire. Single-wire main circuit inserts (1 and 2) can be used as... Figure 1 The cone shape can also be cylindrical; the cylindrical shape is existing technology and is not illustrated. It should be noted that the main circuit single-wire plug and socket has two DC connections and three AC connections. The sheathed wire plug and socket is also existing technology and can also be cone-shaped.
Claims
1. A plug and socket for charging electric vehicles, characterized in that: The main circuit insertion head 1 of the plug is conical, or the main circuit insertion hole 2 of the socket is conical.
2. A plug and socket for charging electric vehicles, characterized in that... In a plug, there is only one main circuit insertion head 1, or in a socket, there is only one main circuit insertion hole 2.
3. A plug and socket for charging electric vehicles, characterized in that... In a set of charging connections, there is a plug for a sheathed cable or a socket for a sheathed cable, and two or three single-wire plugs for the main circuit or two or three single-wire sockets for the main circuit, that is, two or three single-wire main circuit plugs 1 or two or three single-wire main circuit plug holes 2.
4. The plug and socket for charging electric vehicles according to claim 1, characterized in that... The main circuit insertion head 1 is described as having only one on a plug, or the main circuit insertion hole 2 is described as having only one on a socket.
5. The plug and socket for charging electric vehicles according to claim 2, characterized in that... The main circuit insertion head 1 is conical, or the main circuit insertion hole 2 is conical.
6. The plug and socket for charging electric vehicles according to claim 3, characterized in that... The single-wire main circuit insert 1 and single-wire main circuit insert hole 2 mentioned above can be either conical or cylindrical, as shown in Figure 1.