High-voltage interlock structure for charging inlet of electric vehicle and charging device

Abstract

The present invention discloses a high-voltage interlock structure and charging device for an electric vehicle charging inlet, comprising a charging inlet body, a connector, a back cover, a control device, and a high-voltage interlock connector, wherein the connector is detachably connected to the charging inlet body, the back cover is detachably connected to the charging inlet body, the control device is provided within the charging inlet body, a high-voltage interlock connector is provided between the charging inlet body and the connector, and / or the high-voltage interlock connector is provided between the charging inlet body and the back cover, the high-voltage interlock connector is connected to a circuit in which the control device is located, and when any of the high-voltage interlock connectors is turned off, the control device controls the charging inlet to be disconnected from a power source. With the high-voltage interlock structure and charging device for an electric vehicle charging inlet according to the present disclosure, when any of the male and female connectors are separated, the control device automatically disconnects the high-voltage circuit, preventing an operator from being injured during maintenance or use.

Description

Related Applications

[0001] This application claims priority to a Chinese patent application filed on December 28, 2021, bearing application number 202111622119.9 and entitled "High-voltage interlock structure and charging device for charging inlet of electric vehicle," the entire contents of which are incorporated herein by reference. [Technical Field]

[0002] The present invention relates to the technical field of connectors, and more particularly to a high voltage interlock structure and charging device for a charging inlet of an electric vehicle. [Background technology]

[0003] Energy shortages and environmental pollution are two challenges hindering the development of the automotive and related industries. New energy vehicles, as a solution to these challenges, are becoming the mainstream of the current automotive industry. One of the characteristics of new energy vehicles compared to conventional vehicles is that they often operate in high-current, high-voltage environments, which far exceed the safe voltages for the human body. Conventional charging inlets are unreliable and pose significant safety risks. They cannot meet the current requirements for new energy vehicle use.

[0004] Therefore, in the technical field of electric vehicle charging, there is a demand for a charging inlet that can be quickly removed, and when the charging inlet is removed or the back cover of the charging inlet is opened, the vehicle will automatically disconnect the high voltage circuit to protect the safety of the operator. Summary of the Invention

[0005] The present invention aims to provide a new technical solution of a high voltage interlock structure for a charging inlet of an electric vehicle.

[0006] According to a first aspect of the present invention, there is provided a high voltage interlock structure for a charging inlet of an electric vehicle, comprising: The charging inlet itself, at least one connector detachably connected to the charging inlet body; a back cover that is detachably connected to the charging inlet body; a control device provided in the charging inlet body or in the electric vehicle; a high-voltage interlock connector, the high-voltage interlock connector being provided between the charging inlet body and the connector, and / or the high-voltage interlock connector being provided between the charging inlet body and the back cover, the high-voltage interlock connector being connected to a circuit in which the control device is located; When any of the high voltage interlock connectors is disconnected, the control device controls the charging inlet to be disconnected from the power source.

[0007] Optionally, each of the high-voltage interlock connectors includes a male connection portion and a female connection portion that are inserted into each other, and the connector is provided with the male connection portion, and / or the back cover is provided with the male connection portion, and the charging inlet body is provided with the female connection portion, and the female connection portion is connected to the male connection portion in a one-to-one correspondence.

[0008] Optionally, the connector and / or the back cover may further include an attachment portion, which may be integrally injection molded with the male connector portion or may be removably connected thereto.

[0009] Optionally, the male connector comprises a conductive material and is U-shaped or V-shaped, with both ends of the U-shape or V-shape protruding from the mounting surface of the mounting portion.

[0010] Optionally, the tip of the U-shaped or V-shaped male connector is chamfered or rounded.

[0011] Optionally, the male connector comprises a conductive material and is U-shaped or V-shaped, and the mounting portion further comprises a cavity with one open end, with both ends of the U-shape or V-shape protruding from the bottom of the cavity.

[0012] Optionally, each of the female connection parts includes an interlock connection base and two connection terminals, the interlock connection base has two through holes, the two connection terminals are respectively attached to the corresponding through holes, and one end of the connection terminal is electrically connected to the control device and the other end is electrically connected to the corresponding male connection part.

[0013] Optionally, the connector further includes a locking piece provided on one of the outer periphery of the connection terminal and the inner wall of the corresponding through hole, and a locking groove provided on the other of the outer periphery of the connection terminal and the inner wall of the corresponding through hole.

[0014] Optionally, each of the interlock connection bases is integrally injection molded with or removably connected to the charging inlet body.

[0015] Optionally, the top of the connection terminal is lower than the top of the through hole, the shape of the male connection portion is U-shaped or V-shaped, and both ends of the U-shaped or V-shaped are inserted into the corresponding through hole and electrically connected to the connection terminal therein.

[0016] Optionally, the contact resistance between the male connection portion and the connection terminal is less than 9 mΩ.

[0017] Optionally, the interlock connection base includes a base portion and a protrusion portion, the two through holes respectively passing through the base portion and the protrusion portion, the male connection portion is fixed to the mounting portion of the connector or the back cover and is U-shaped or V-shaped, the mounting portion further includes a cavity with one open end, both ends of the U-shape or V-shape protrude from the bottom surface of the cavity, the protrusion portion is inserted into the cavity and fitted, and both ends of the U-shape or V-shape are respectively inserted into the through holes and electrically connected to the connection terminals therein.

[0018] Selectively, when the connector or the back cover and the charging inlet body are in the attached position, both ends of the U-shape or the V-shape are inserted into and overlap the connection terminals.

[0019] Optionally, a sealing device is provided between the connector and back cover and the charging inlet body.

[0020] Optionally, the connector and the back cover are connected to the charging inlet body by one or more of adhesive connection, magnetic attraction connection, bayonet connection, insertion connection, and buckle connection.

[0021] According to a first aspect of the present invention, there is provided a charging device, the charging device including a charging terminal, a cable, and the high-voltage interlock structure for a charging inlet of an electric vehicle as described above, wherein the charging terminal is connected to the cable and is provided on the charging inlet body for conducting high-voltage current, and when the connector and / or the back cover is completely separated from the charging inlet body, the connection between the male connection portion and the female connection portion is cut off and a signal is supplied to the control device, which cuts off the high-voltage current in the cable.

[0022] Optionally, the charging terminal and the mating terminal of the mating end are connected to conduct current, and the charging terminal and the mating terminal are not separated just before the male connector and the female connector are disconnected.

[0023] The high-voltage interlock structure for a charging inlet of an electric vehicle according to the present disclosure has the following advantages.

[0024] 1. The high-voltage interlock structure for electric vehicle charging inlets allows the control device to automatically cut off the high-voltage circuit when either the male connector or the female connector is separated, preventing the operator from being harmed during maintenance or use.

[0025] 2. By providing two high-voltage interlock connectors on the charging inlet, the operator can easily select the high-voltage interlock connector to open as needed, making it easier for the operator to maintain the equipment.

[0026] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the invention, taken in conjunction with the drawings. [Brief explanation of the drawings]

[0027] The drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0028] [Figure 1] 1 is an exploded view of a high voltage interlock structure for a charging inlet of an electric vehicle according to the present invention; FIG. [Figure 2] 1 is a schematic diagram of a connector according to the present invention; [Figure 3] 1 is a schematic diagram of a back cover according to the present invention. [Figure 4] 1 is a schematic diagram of a back cover according to the present invention. [Figure 5] 1 is a schematic diagram of a charging inlet body according to the present invention. [Figure 6] 1 is a schematic perspective view of a charging inlet body according to the present invention; [Figure 7] FIG. 2 is a cross-sectional view of a charging inlet body according to the present invention. [Figure 8]FIG. 7 is an enlarged view of part A in FIG. 6. [Figure 9] FIG. 2 is a cross-sectional view of a charging inlet body according to the present invention. [Figure 10] FIG. 10 is an enlarged view of part B in FIG. [Figure 11] 1 is a structural schematic diagram of an interlock connection base according to the present invention; [Figure 12] 1 is a cross-sectional view of an interlock connection base according to the present invention.

[0029] The symbols in the figure are explained below.

[0030] 1, charging inlet body, 11, mating terminal, 2, connector, 21, charging terminal, 3, back cover, 4, male connection portion, 5, female connection portion, 51, interlock connection base, 52, connection terminal, 514, guide portion, 511, base, 512, protrusion portion, 513, through hole, 6, mounting portion, 61, mounting surface, 7, sealing device. DETAILED DESCRIPTION OF THE INVENTION

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that unless otherwise specified, the relative arrangement of elements and steps, formulas and numerical values ​​described in these embodiments do not limit the scope of the present invention.

[0032] The following description of at least one exemplary embodiment is intended to be illustrative only and is not intended to limit the invention, its applications, or uses in any way.

[0033] Techniques, methods and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, said techniques, methods and equipment should be considered part of the specification.

[0034] In all examples shown and discussed herein, any specific values ​​should be construed as merely illustrative and not limiting, and thus other instances of the illustrative embodiment may have different values.

[0035] As shown in FIGS. 1 to 5, the high-voltage interlock structure for a charging inlet of an electric vehicle according to the present disclosure includes: Charging inlet body 1, At least one connector 2 that is detachably connected to the charging inlet body 1; a back cover 3 that is detachably connected to the charging inlet body 1; a control device provided in the charging inlet main body 1 or in the electric vehicle; a high-voltage interlock connector, the high-voltage interlock connector being provided between the charging inlet main body 1 and the connector 2, and / or the high-voltage interlock connector being provided between the charging inlet main body 1 and the back cover 3, the high-voltage interlock connector being connected to a circuit in which the control device is located; When any of the high voltage interlock connectors is disconnected, the control device controls the charging inlet to be disconnected from the power source.

[0036] In a specific implementation, the connector 2 may be an AC connector or a DC connector. The connector 2 is connected to a power source and a power storage device (e.g., a battery for a new energy vehicle) to transmit energy from the power source to the power storage device. During use, maintenance of the charging inlet is unavoidable. When the connector 2 or the back cover 3 is removed, if the connector and the power source are not disconnected, a short circuit may occur, which may result in injury to people.

[0037] In a specific implementation, when the charging inlet is provided with only one AC connector, the high-voltage interlock connector includes a first high-voltage interlock connector and a second high-voltage interlock connector, the first high-voltage interlock connector is provided between the charging inlet body 1 and the connector 2, and / or the second high-voltage interlock connector is provided between the charging inlet body 1 and the back cover 3, and the high-voltage interlock connector is connected to a circuit in which the control device is located; The control device is arranged to control the charging inlet to be disconnected from the power source when the high voltage interlock connector is disconnected.

[0038] In a specific implementation, by using high-voltage interlock connectors, if one high-voltage interlock connector is disconnected, the control device automatically controls to disconnect the charging inlet from the power source, preventing the operator from being harmed during maintenance or use. By providing two high-voltage interlock connectors on one charging inlet, the operator can easily select the high-voltage interlock connector that is easiest to open as needed, making it easier for the operator to maintain the equipment.

[0039] In a specific implementation, a high-voltage interlock connector is provided between connector 2 and charging inlet body 1, so that when connector 2 and charging inlet body 1 are separated during installation, the control device controls the charging inlet to be disconnected from the power source, preventing the operator from receiving an electric shock if they touch the conductive device inside connector 2 during installation. A high-voltage interlock connector is provided between back cover 3 and charging inlet body 1, so that if the operator forgets to separate connector 2 and charging inlet body 1 during maintenance, the separation of the charging inlet and the power source can be completed during maintenance after removing back cover 3, preventing the operator from receiving an electric shock.

[0040] In one embodiment of the high-voltage interlock structure for a charging inlet of an electric vehicle according to the present disclosure, as shown in Figures 6 to 10, each of the high-voltage interlock connectors includes a male connection portion 4 and a female connection portion 5 that are inserted into each other, and the connector 2 is provided with the male connection portion 4, and / or the back cover 3 is provided with the male connection portion 4, and the charging inlet main body 1 is provided with the female connection portion 5, and the female connection portion 5 is connected to the male connection portion 4 in a one-to-one correspondence.

[0041] In a specific implementation, the first high-voltage interlock connector includes a male connection portion 4 and a female connection portion 5 that are inserted into each other, with the male connection portion 4 being provided on one of the connector 2 and the charging inlet body 1 and the female connection portion 5 being provided on the other of the connector 2 and the charging inlet body 1, and the second high-voltage interlock connector includes a male connection portion 4 and a female connection portion 5 that are inserted into each other, with the male connection portion 4 being provided on one of the back cover 3 and the charging inlet body 1 and the female connection portion 5 being provided on the other of the back cover 3 and the charging inlet body 1.

[0042] In a specific implementation, by making the high-voltage interlock connector into a male connection part 4 and a female connection part 5 that are inserted into each other, the high-voltage interlock connector can be easily disconnected and connected, making it easy for operators to use.

[0043] Furthermore, it further includes an attachment portion 6, which is provided on the connector 2 or the back cover 3, and which is either injection molded integrally with the male connection portion 4 or removably connected thereto.

[0044] In a specific implementation, the male connection portion 4 is provided on one of the connector 2 and the charging inlet body 1, and the female connection portion 5 is provided on the other of the connector 2 and the charging inlet body 1, or the male connection portion 4 is provided on one of the back cover 3 and the charging inlet body 1, and the female connection portion 5 is provided on the other of the back cover 3 and the charging inlet body 1. In this case, the attachment portion 6 is provided on one of the connector 2 or the charging inlet body 1 and corresponds to the male connection portion 4, and the attachment portion 6 is provided on one of the back cover 3 or the charging inlet body 1 and corresponds to the male connection portion 4, and the attachment portion 6 is either injection molded integrally with the male connection portion 4 or is removably connected to it.

[0045] In specific implementation, the connection method between the male connector 4 and the mounting part 6 can be set according to actual needs. If they are connected by an integral injection molding method, the connection between the two will be stronger, while if they are connected by a detachable connection method, they can be replaced if one of them is damaged.

[0046] Furthermore, as shown in Figures 2 to 4, the male connection portion 4 contains a conductive material and is U-shaped or V-shaped, with both ends of the U-shape or V-shape protruding from the mounting surface 61 of the mounting portion 6.

[0047] In a specific implementation, the male connector 4 is configured as a U-shaped male connector or a V-shaped male connector, and both ends of the U-shaped male connector or the V-shaped male connector protrude from the mounting surface 61 of the mounting part 6. In a specific implementation, the male connector 4 is configured as a U-shaped male connector or a V-shaped male connector, and both ends of the U-shaped male connector 4 or the V-shaped male connector 4 protrude from the mounting surface 61, which makes it easy to connect the male connector 4 and the female connector 5 and makes it easy to operate.

[0048] Furthermore, the tip of the U-shaped or V-shaped male connector 4 is chamfered or rounded.

[0049] In a specific implementation, a guide portion 514 may be provided in the direction from the top of the through hole 513 to the top of the connection terminal 52, and the internal radial dimension of the guide portion 514 may gradually decrease from the top of the through hole 513 to the top of the connection terminal 52, so that the end of the male connection portion 4 can enter the through hole 513 through the guide portion 514 to complete the insertion connection with the connection terminal 52. The tip of the male connection portion 4 may be chamfered or rounded, making it easier and more convenient to insert the male connection portion 4 into the top of the connection terminal 52 or into the guide portion 514 provided at the top of the through hole 513.

[0050] Furthermore, the male connection portion 4 includes a conductive material and is U-shaped or V-shaped, and the mounting portion 6 further includes a cavity with one open end, with both ends of the U-shape or V-shape protruding from the bottom surface of the cavity.

[0051] In a specific implementation, the mounting portion 6 further includes a cavity with at least one open end, and both ends of the U-shaped male connector or the V-shaped male connector protrude from the bottom surface of the cavity.

[0052] In a specific implementation, the male connector 4 is a U-shaped or V-shaped male connector, and both ends of the U-shaped or V-shaped male connector 4 protrude from the bottom surface of the cavity, facilitating connection between the male connector 4 and the female connector 5 and facilitating operation. The male connector 4 contains a conductive material, allowing electrical connection with the female connector 5, and the control device controls communication between the charging inlet and the power source based on whether the male connector 4 and the female connector 5 are electrically connected.

[0053] Furthermore, as shown in Figures 11 and 12, each of the female connection parts 5 includes an interlock connection base 51 and two connection terminals 52, and the interlock connection base 51 has two through holes 513, and the two connection terminals 52 are respectively attached to the corresponding through holes 513, and one end of the connection terminal 52 is electrically connected to the control device and the other end is electrically connected to the corresponding male connection part 4.

[0054] In a specific implementation, the female connector 5 includes an interlock connector base 51 and two connector terminals 52, the interlock connector base 51 is provided with two through holes 513, the two connector terminals 52 are respectively attached to the corresponding through holes 513, one end of each connector terminal 52 is electrically connected to the control device, and the other end is electrically connected to the corresponding male connector 4. This facilitates insertion of the female connector 5 into both ends of the U-shaped or V-shaped male connector 4, making it easy to operate and highly practical.

[0055] Furthermore, it further includes a locking piece provided on one of the outer periphery of the connection terminal 52 and the inner wall of the corresponding through hole 513, and a locking groove provided on the other of the outer periphery of the connection terminal 52 and the inner wall of the corresponding through hole 513.

[0056] In specific implementation, by installing the locking piece and locking groove, the connection between the connector 2 and the back cover 3 and the charging inlet body 1 can be prevented from separating during charging of the charging inlet, thereby improving the stability of the charging inlet during charging.

[0057] Furthermore, each of the interlock connection stands 51 is either integrally injection molded with the charging inlet body 1 or detachably connected thereto.

[0058] In a specific implementation, the male connection portion 4 is provided on one of the connector 2 and the charging inlet body 1, and the female connection portion 5 is provided on the other of the connector 2 and the charging inlet body 1, or the male connection portion 4 is provided on one of the back cover 3 and the charging inlet body 1, and the female connection portion 5 is provided on the other of the back cover 3 and the charging inlet body 1. In this case, the interlock connection base 51 is either injection molded integrally with or detachably connected to the connector 2, or either injection molded integrally with or detachably connected to the back cover 3, or either injection molded integrally with or detachably connected to the charging inlet body 1.

[0059] In specific implementation, the connection method between the interlock connection base 51 and the charging inlet main body 1, the connection method between the interlock connection base 51 and the connector 2, and the connection method between the interlock connection base 51 and the back cover 3 can be set according to actual needs. If the connection is made using the one-piece injection molding method, the connection between the two will be stronger. If the connection is made using a detachable connection method, the two connected to each other can be replaced if one is damaged.

[0060] Furthermore, the top of the connection terminal 52 is lower than the top of the through hole 513, the shape of the male connection part 4 is U-shaped or V-shaped, and both ends of the U-shaped or V-shaped are inserted into the corresponding through hole 513 and electrically connected to the connection terminal 52 therein.

[0061] In a specific implementation, the top of the connection terminal 52 is lower than the top of the through hole 513, and both ends of the U-shaped male connection portion or the V-shaped male connection portion are inserted into the corresponding through hole 513 and electrically connected to the connection terminal 52 therein.

[0062] In a specific implementation, by configuring the male connection portion 4 as a U-shaped male connection portion or a V-shaped male connection portion, it can be inserted into the female connection portion 5 to form a circuit with the female connection portion 5, making it easy for the control device to control the charging inlet to be connected to the power source.Furthermore, when the male connection portion 4 and the female connection portion 5 are completely separated, the control device can easily control the charging inlet to be disconnected from the power source based on a signal indicating that the connection between the male connection portion 4 and the female connection portion 5 has been cut off, making operation simple.

[0063] Furthermore, the contact resistance between the male connector 4 and the connector terminal 52 is less than 9 mΩ.

[0064] In one embodiment, the contact resistance between the male connector 4 and the connection terminal 52 is less than 9 mΩ. Preferably, the contact resistance between the male connector 4 and the connection terminal 52 is less than 1 mΩ. Generally, a large current needs to be conducted between the male connector 4 and the connection terminal 52. If the contact resistance between the male connector 4 and the connection terminal 52 exceeds 9 mΩ, a large temperature rise will occur at the contact point, and the temperature will increase over time. If the temperature between the male connector 4 and the connection terminal 52 is too high, internal stress will occur between the male connector 4 and the connection terminal 52 and the conductive corrosion prevention layers on their surfaces. In the worst case, this will cause the conductive corrosion prevention layers to fall off, making the protection function ineffective. In addition, if the temperature between the male connector 4 and the connection terminal 52 is too high, the corresponding insulating layers will melt, preventing them from fulfilling their insulating protection function. In the worst case, this may result in a short circuit, damage to the charging inlet, or even fire, which may cause safety hazards. Therefore, the inventors set the contact resistance between the male connection portion 4 and the connection terminal 52 to less than 9 mΩ.

[0065] In order to verify the influence of the contact resistance between the male connector 4 and the connection terminal 52 on the temperature rise and conductivity of the high-voltage interlock structure, the inventors selected the same male connector 4 and connection terminals 52 with different contact resistances and conducted tests on the conductivity and temperature rise.

[0066] The conductivity test is carried out by joining the male connector 4 and the connector terminal 52, passing a current through them, and detecting the conductivity of the corresponding joint. In this embodiment, a conductivity of greater than 99% is considered the ideal value.

[0067] The temperature rise test was carried out by passing the same current through the insertion structure, detecting the temperatures at the same positions on the male connector 4 and the connector terminal 52 in a closed environment before and after the temperature had stabilized, and calculating the absolute value of the difference. In this example, a temperature rise of more than 50 K was deemed a failure.

[0068] Table 1: Effect of different contact resistances between the male connector 4 and the connector terminal 52 on conductivity and temperature rise

[0069] [Table 1] As can be seen from Table 1 above, when the contact resistance between the male connector 4 and the connection terminal 52 exceeds 9 mΩ, the temperature rise of the insertion structure exceeds 50 K and the conductivity of the joint between the male connector 4 and the connection terminal 52 is also less than 99%, which does not meet the standard requirements. Therefore, the inventors set the contact resistance between the male connector 4 and the connection terminal 52 to less than 9 mΩ. Furthermore, the inventors have found that when the contact resistance is less than 1 mΩ, the temperature rise is more significantly reduced and the conductivity is high, so in the present invention, it is preferable that the contact resistance between the male connector 4 and the connection terminal 52 is less than 1 mΩ.

[0070] Furthermore, the interlock connection base 51 includes a base portion 511 and a protrusion portion 512, and the two through holes 513 pass through the base portion 511 and the protrusion portion 512, respectively. The male connection portion 4 is fixed to the mounting portion 6 of the connector 2 or the mounting portion 6 of the back cover 3 and is U-shaped or V-shaped. The mounting portion 6 further includes a cavity with one open end, and both ends of the U-shape or V-shape protrude from the bottom surface of the cavity. The protrusion portion 512 is inserted into the cavity and fitted, and both ends of the U-shape or V-shape are inserted into the through holes 513 and electrically connected to the connection terminals 52 therein.

[0071] In a specific implementation, the interlock connection base 51 includes a base portion 511 and a protrusion portion 512, and the two through holes 513 pass through the base portion 511 and the protrusion portion 512, respectively, and the protrusion portion 512 is inserted into and fitted into the cavity.

[0072] In a specific implementation, the mounting portion 6 is made into a cavity with at least one end open, and the protrusion portion 512 is inserted into the cavity and fitted to fit, thereby further ensuring the stability of the connection between the male connecting portion 4 and the female connecting portion 5 and preventing the connection between the male connecting portion 4 and the female connecting portion 5 from being weak.

[0073] 2 to 4, in the illustrated embodiments, male connection portion 4 is provided on mounting portion 6, which is provided on connector 2 or back cover 3, and interlock connection base 51 is provided on charging inlet main body 1. Although not shown in the drawings, any of the embodiments in which mounting portion 6 is provided on charging inlet main body 1 and interlock connection base 51 is provided on connector 2 or back cover 3 are within the scope of protection of the present invention.

[0074] Furthermore, when the connector 2 or the back cover 3 and the charging inlet main body 1 are in the mounting position, both ends of the U-shaped male connection portion or the V-shaped male connection portion are inserted into the connection terminal 52 and overlap.

[0075] In a specific implementation, when the connector 2 or back cover 3 and the charging inlet body 1 are in the mounting position, it is sufficient that the male connection portion 4 and the female connection portion 5 come into contact and allow current conduction, and the overlap length between both ends of the U-shaped male connection portion or the V-shaped male connection portion and the connection terminal 52 is not specifically limited.

[0076] In a specific implementation, the distance that the connector 2 or the back cover 3 moves from its position in the charging inlet body 1 to the position where it is completely separated is not specifically limited; it is sufficient that when the connector 2 or the back cover 3 is connected to the charging inlet body 1, the male connection portion 4 and the female connection portion 5 come into contact to achieve current conduction, and it is sufficient that the connector 2 or the back cover 3 is easy to operate when separated from the charging inlet body 1.

[0077] In one embodiment of the high-voltage interlock structure for a charging inlet of an electric vehicle according to the present disclosure, a sealing device 7 is provided between the connector 2 and the back cover 3 and the charging inlet body 1 .

[0078] In concrete practice, the sealing device 7 can prevent dust and foreign matter from entering the charging inlet body 1, thereby extending the service life of the charging inlet.

[0079] In one embodiment of the high-voltage interlock structure for a charging inlet of an electric vehicle according to the present disclosure, the connector 2 and the back cover 3 are connected to the charging inlet body 1 by one or more of adhesive connection, magnetic adsorption connection, bayonet connection, insertion connection, and buckle connection.

[0080] In a specific implementation, there are no specific restrictions on the connection method between the connector 2 and the back cover 3 and the charging inlet body 1, as long as the connector 2 and the charging inlet body 1, and the back cover 3 and the charging inlet body 1 can be detached, which allows the user to detach the back cover 3 and the connector 2 as needed, making it convenient and easy to use.

[0081] A charging device comprising a charging terminal (21), a cable, and the high-voltage interlock structure for a charging inlet of an electric vehicle described in any one of the above, wherein the charging terminal (21) is connected to the cable, is provided within the charging inlet body (1), and is for conducting high-voltage current; when the connector (2) and / or the back cover (3) are completely separated from the charging inlet body (1), the connection between the male connection portion (4) and the female connection portion (5) is cut off and a signal is supplied to the control device, which then cuts off the high-voltage current in the cable.

[0082] In a specific implementation, by providing the above-described high-voltage interlock structure for the charging inlet of an electric vehicle in a charging device, when the connector 2 and / or the back cover 3 are completely separated from the charging inlet body 1, the connection between the male connection portion 4 and the female connection portion 5 is cut off and a signal is sent to the control device, which then cuts off the high-voltage current in the cable, thereby ensuring the safety of the operator.

[0083] In one embodiment of the charging device according to the present disclosure, the charging terminal 21 is connected to the mating terminal 11 of the other end to conduct current, and the charging terminal 21 and the mating terminal 11 do not separate just before the male connection portion 4 and the female connection portion 5 separate.

[0084] Specifically, when implementing Mating terminal 11is provided on charging inlet body 1 and covered by connector 2, and just before male connection part 4 and female connection part 5 between connector 2 and charging inlet body 1 separate (this can also be expressed as just before the connection is severed), charging terminal 21 and mating terminal 11 do not separate, and at this time, when the connection between male connection part 4 and female connection part 5 is completely severed, the power supply within charging inlet body 1 is turned off, and then charging terminal 21 separates from mating terminal 11, thereby preventing electrochemical corrosion from occurring between charging terminal 21 and mating terminal 11 and preventing sparks from occurring when charging terminal 21 and mating terminal 11 are separated.

[0085] In a specific implementation, when the connector 2 is attached to the charging inlet body 1, the male connection portion 4 and the female connection portion 5 can partially overlap, and the distance of the partial overlap between the male connection portion 4 and the female connection portion 5 is smaller than the overlap length between the charging terminal 21 and the mating terminal 11. This allows the charging terminal 21 and the mating terminal 11 to be separated from each other without current flowing through the charging inlet body 1 after the male connection portion 4 and the female connection portion 5 are separated, thereby preventing electrochemical corrosion from occurring between the charging terminal 21 and the mating terminal 11 and preventing sparks from occurring when the charging terminal 21 and the mating terminal 11 are separated.

[0086] While several specific embodiments of the present invention have been described in detail using examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications can be made to the above examples without departing from the scope and spirit of the present invention. The scope of the present invention is limited by the appended claims.

Claims

1. In a high-voltage interlock structure for an electric vehicle charging inlet, A charging inlet body (1), At least one connector (2) detachably connected to the charging inlet body (1); a back cover (3) that is detachably connected to the charging inlet body (1); a control device provided in the charging inlet body (1) or in the electric vehicle; a high-voltage interlock connector, the high-voltage interlock connector being provided between the charging inlet body (1) and the connector (2) and / or the high-voltage interlock connector being provided between the charging inlet body (1) and the back cover (3), the high-voltage interlock connector being connected to a circuit in which the control device is located; When any of the high-voltage interlock connectors is disconnected, the control device controls the charging inlet to be disconnected from the power source; Each of the high voltage interlock connectors includes a male connection portion (4) and a female connection portion (5) that are inserted into each other, The connector (2) is provided with the male connection portion (4), and / or the back cover (3) is provided with the male connection portion (4), The charging inlet body (1) is provided with the female connection portion (5), and the female connection portion (5) is connected to the male connection portion (4) in a one-to-one correspondence; The electric vehicle charging inlet further includes a mounting portion (6) where a high-voltage interlock structure for the electric vehicle charging inlet is provided on the connector (2) and / or the back cover (3); The mounting portion (6) is removably connected to the male connector portion (4), The male connector (4) includes a conductive material and is U-shaped or V-shaped, with both ends of the U-shaped or V-shaped connector projecting from the mounting surface (61) of the mounting portion (6).

1. A high-voltage interlock structure for a charging inlet of an electric vehicle, comprising:

2. The tip of the U-shaped or V-shaped male connector (4) is chamfered or rounded.

2. The high-voltage interlock structure for a charging inlet of an electric vehicle according to claim 1.

3. The male connector (4) includes a conductive material and is U-shaped or V-shaped, and the mounting portion (6) further includes a cavity with one open end, with both ends of the U-shaped or V-shaped protruding from the bottom of the cavity.

2. The high-voltage interlock structure for a charging inlet of an electric vehicle according to claim 1.

4. Each of the female connectors (5) includes an interlock connector base (51) and two connector terminals (52), the interlock connector base (51) has two through holes (513), and the two connector terminals (52) are attached to the corresponding through holes (513), respectively. The connection terminal (52) has one end electrically connected to the control device and the other end electrically connected to the corresponding male connector (4).

2. The high-voltage interlock structure for a charging inlet of an electric vehicle according to claim 1.

5. The connector further includes a locking piece provided on one of the outer periphery of the connection terminal (52) and the inner wall of the corresponding through hole (513), and a locking groove provided on the other of the outer periphery of the connection terminal (52) and the inner wall of the corresponding through hole (513).

5. The high-voltage interlock structure for a charging inlet of an electric vehicle according to claim 4.

6. Each of the interlock connection bases (51) is either integrally injection molded with the charging inlet body (1) or detachably connected thereto.

5. The high-voltage interlock structure for a charging inlet of an electric vehicle according to claim 4.

7. The top of the connection terminal (52) is lower than the top of the through hole (513), The male connector (4) is U-shaped or V-shaped, and both ends of the U-shaped or V-shaped connector are inserted into the corresponding through-holes (513) to be electrically connected to the connector terminals (52) therein.

5. The high-voltage interlock structure for a charging inlet of an electric vehicle according to claim 4.

8. The contact resistance between the male connector (4) and the connector terminal (52) is less than 9 mΩ.

5. The high-voltage interlock structure for a charging inlet of an electric vehicle according to claim 4.

9. The interlock connection base (51) includes a base portion (511) and a protrusion portion (512), The two through holes (513) pass through the base portion (511) and the protrusion portion (512), respectively, the male connection portion (4) is fixed to the mounting portion (6) of the connector (2) or the back cover (3), and is U-shaped or V-shaped, the mounting portion (6) further includes a cavity with one end open, and both ends of the U-shaped or V-shaped protrude from the bottom surface of the cavity, The protrusion (512) is inserted into the cavity and fitted therein, and both ends of the U-shape or V-shape are inserted into the through-holes (513) and electrically connected to the connection terminals (52) therein.

5. The high-voltage interlock structure for a charging inlet of an electric vehicle according to claim 4.

10. When the connector (2) or the back cover (3) is in the mounting position with the charging inlet body (1), both ends of the U-shape or V-shape are inserted into the connection terminals (52) and overlap each other. The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 7.

11. A sealing device (7) is provided between the connector (2) and the back cover (3) and the charging inlet body (1).

2. The high-voltage interlock structure for a charging inlet of an electric vehicle according to claim 1.

12. The connector (2) and the back cover (3) are connected to the charging inlet body (1) by one or more of adhesive connection, magnetic attraction connection, bayonet connection, insertion connection, and buckle connection.

2. The high-voltage interlock structure for a charging inlet of an electric vehicle according to claim 1.

13. In the charging device, a charging terminal (21), a cable, and the high-voltage interlock structure for a charging inlet of an electric vehicle according to any one of claims 1 to 12; The charging terminal (21) is connected to the cable and is connected to a mating terminal (11) at the mating end provided on the charging inlet body (1) to conduct high-voltage current; When the connector (2) and / or the back cover (3) are completely separated from the charging inlet body (1), the connection between the male connector (4) and the female connector (5) is cut off, and a signal is sent to the control device, which then cuts off the high voltage current in the cable. A charging device characterized by:

14. Just before the male connector (4) and female connector (5) are disconnected, the charging terminal (21) and the mating terminal (11) do not separate.

14. The charging device according to claim 13.

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