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 electric vehicle charging inlet", 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 shortage and environmental pollution are two difficult problems that hinder the development of the automobile industry and related industries. New energy vehicles, as a solution to solve the above problems, are becoming the mainstream of the current automobile industry. Compared with traditional automobiles, one of the characteristics of new energy vehicles is that new energy vehicles often operate in a high current and high voltage environment, which far exceeds the safe voltage of the human body. Traditional charging inlets have low reliability and high hidden safety hazards. They cannot meet the current requirements for the use of new energy vehicles.

[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 the 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 body, At least one connector that is 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 controller 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 in one-to-one correspondence to the male connection portion.

[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 portion comprises a conductive material and is U-shaped or V-shaped, with both ends of the U-shape or V-shape protruding beyond 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 connection portion comprises a conductive material and is U-shaped or V-shaped, and the mounting portion further comprises a cavity having an open end, with both ends of the U-shape or V-shape protruding from a bottom surface 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 terminals is electrically connected to the control device and the other end is electrically connected to the corresponding male connection part.

[0013] The connector further includes, optionally, 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 stations is either 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-shape or V-shape 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 pass through the base portion and the protrusion portion, the male connection portion is fixed to an attachment portion of the connector or the back cover and is U-shaped or V-shaped, the attachment portion further includes a cavity with one open end, both ends of the U-shape or V-shape protrude from a bottom surface of the cavity, the protrusion portion is inserted into the cavity and engaged, 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 an attachment 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 the 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 adsorption connection, bayonet connection, plug 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 a high-voltage interlock structure for a charging inlet of an electric vehicle as described above, the charging terminal being connected to the cable and 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 effects:

[0024] 1. The high-voltage interlock structure for electric vehicle charging inlets enables the control device to automatically cut off the high-voltage circuit when any of the male and female connectors are separated, preventing operators from being harmed during maintenance or use.

[0025] 2. By providing two high-voltage interlock connectors on the charging inlet, it is easy for the operator to select which 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 present invention when considered in conjunction with the drawings. [Brief description 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] FIG. 2 is an exploded view of a high voltage interlock structure for a charging inlet of an electric vehicle according to the present invention. [Diagram 2] 1 is a schematic diagram of a connector according to the present invention; [Diagram 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. [Diagram 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. [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 schematic structural diagram of an interlock connection block according to the present invention; [Figure 12] FIG. 2 is a cross-sectional view of an interlock connection block according to the present invention.

[0029] The symbols in the figure are explained as follows.

[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 PREFERRED EMBODIMENTS

[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 the components and steps, the formulas and 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 merely illustrative and is not intended to limit the invention or its application or uses.

[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 as 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 example 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: A 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 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 controller 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 of a new energy vehicle) to transmit energy from the power source to the power storage device, and during use, it is unavoidable to maintain the charging inlet. When the connector 2 or the back cover 3 is removed, if the connector and the power source are not disconnected, there is a risk of injury from electric shock due to a short circuit.

[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 controller is arranged to control the charging inlet to be disconnected from a 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 the charging inlet to be disconnected 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 a high-voltage interlock connector that is easier 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 the connector 2 and the charging inlet body 1, and by separating the connector 2 and the charging inlet body 1 during the installation process, the control device controls the charging inlet to be disconnected from the power source, thereby preventing the operator from receiving an electric shock when touching the conductive device inside the connector 2 during the installation process of the charging inlet. A high-voltage interlock connector is provided between the back cover 3 and the charging inlet body 1, and if the operator forgets to separate the connector 2 and the charging inlet body 1 during maintenance, the separation of the charging inlet and the power source can be completed during the maintenance process after removing the 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 which 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 which 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 portion 4 and a female connection portion 5 that are inserted into each other, the high-voltage interlock connector can be easily disconnected and connected, making it easy for an operator 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 integrally injection molded with the male connection portion 4 or is detachably connected to the male connection portion 4.

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

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

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

[0049] In a specific implementation, a guide portion 514 may be provided in a 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 gradually decreases 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 comprises a conductive material and is U-shaped or V-shaped, and the mounting portion 6 further comprises 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 embodiment, the mounting portion 6 further includes a cavity with at least one open end, and both ends of the U-shaped male connector portion or the V-shaped male connector portion protrude from the bottom surface of the cavity.

[0052] In a specific implementation, the male connection part 4 is a U-shaped male connection part or a V-shaped male connection part, and both ends of the U-shaped male connection part 4 or the V-shaped male connection part 4 protrude from the bottom surface of the cavity, thereby facilitating connection between the male connection part 4 and the female connection part 5 and facilitating operation. The male connection part 4, which includes a conductive material, can achieve electrical connection with the female connection part 5, and the control device controls communication between the charging inlet and the power source based on whether the male connection part 4 and the female connection part 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, the interlock connection base 51 has two through holes 513, 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 connection part 5 includes an interlock connection base 51 and two connection terminals 52, the interlock connection base 51 is provided with two through holes 513, the two connection terminals 52 are respectively attached to the corresponding through holes 513, 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. This facilitates insertion of the female connection part 5 and both ends of the U-shaped male connection part 4 or the V-shaped male connection part 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 a specific implementation, by installing the locking piece and the locking groove, the connection between the connector 2 and the back cover 3 and the charging inlet body 1 can be prevented from coming apart 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. At this time, the interlock connection base 51 is either integrally injection molded with the connector 2 or detachably connected thereto, or either integrally injection molded with the back cover 3 or detachably connected thereto, or either integrally injection molded with the charging inlet body 1 or detachably connected thereto.

[0059] In a 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. When connected by an integrated injection molding method, the connection between the two is stronger, and when connected by 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 portion 4 is U-shaped or V-shaped, and both ends of the U-shape or V-shape 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 part 4 as a U-shaped male connection part or a V-shaped male connection part, it can be inserted into the female connection part 5 to form a circuit with the female connection part 5, making it easy for the control device to control the charging inlet to be connected to the power source.In addition, when the male connection part 4 and the female connection part 5 are completely separated, it is easy for the control device to control the charging inlet to be disconnected from the power source based on a signal that the connection between the male connection part 4 and the female connection part 5 has been cut, 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, it is necessary to conduct a large current 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 become higher and higher as time goes by. 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 layer on each surface, which will cause the conductive corrosion prevention layer to fall off in the worst case, and the protective function will not be realized. In addition, if the temperature of the male connector 4 and the connection terminal 52 is too high, the corresponding insulating layer will melt and will not be able to play the role of insulating protection, and in the worst case, it will cause a short circuit of the line, damage to the charging inlet, and even cause safety accidents such as burning. 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 effect of the contact resistance between the male connection part 4 and the connection terminal 52 on the temperature rise and conductivity of the high-voltage interlock structure, the inventors selected the same male connection part 4 and connection terminals 52 with different contact resistances and conducted tests on the conductivity and temperature rise.

[0066] The conductivity test involves 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 of the male connector 4 and the connector terminal 52 before and after the temperature stabilized in a closed environment, and calculating the absolute value of the difference. In this embodiment, a temperature rise of more than 50K was deemed to be a failure.

[0068] Table 1: Effect of different contact resistances between male connector 4 and 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 50K, 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 inventor sets the contact resistance between the male connector 4 and the connection terminal 52 to less than 9 mΩ. In addition, the inventor has found that when the contact resistance is less than 1 mΩ, the temperature rise is further significantly reduced and the conductivity is also 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 respectively penetrate the base portion 511 and the protrusion portion 512, 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, 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 engaged, and both ends of the U-shape or V-shape are respectively 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 respectively pass through the base portion 511 and the protrusion portion 512, and the protrusion portion 512 is inserted into the cavity and engaged.

[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 engaged, thereby further ensuring the stability of the connection between the male connection portion 4 and the female connection portion 5 and preventing the connection between the male connection portion 4 and the female connection portion 5 from becoming weak.

[0073] 2 to 4, in the illustrated embodiment, male connection portion 4 is provided on attachment portion 6, which is provided on connector 2 or back cover 3, and interlock connection base 51 is provided on charging inlet body 1. An embodiment in which attachment portion 6 is provided on charging inlet body 1 and interlock connection base 51 is provided on connector 2 or back cover 3 is not shown in the drawings, but any of these 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 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 terminals 52 and overlap each other.

[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 to realize electrical 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, as long as the male connection portion 4 and the female connection portion 5 come into contact and current conduction is achieved when the connector 2 or the back cover 3 is connected to the charging inlet body 1, and it is easy to operate when the connector 2 or the back cover 3 is 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 a specific implementation, the provision of 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 limitations 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, allowing the user to remove the back cover 3 and the connector 2 as needed, which is 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 and provided within the charging inlet body 1 for conducting high-voltage current, and 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 cuts off the high-voltage current in the cable.

[0082] In a specific implementation, by providing a high-voltage interlock structure for the charging inlet of an electric vehicle as described above in a charging device, when the connector 2 and / or the back cover 3 is 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, 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 immediately before the male connection portion 4 and the female connection portion 5 separate.

[0084] In a specific implementation, the mating end is provided on the charging inlet body 1 and covered by the connector 2, and just before the male connection part 4 and the female connection part 5 between the connector 2 and the charging inlet body 1 separate (this can also be expressed as just before the connection is severed), the charging terminal 21 and the mating terminal 11 do not separate, and at this time, when the connection between the male connection part 4 and the female connection part 5 is completely severed, the power supply within the charging inlet body 1 is turned off, and then the charging terminal 21 separates from the mating terminal 11, 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.

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

[0086] Although several specific embodiments of the present invention have been described in detail with reference to examples, it should be understood by those skilled in the art that the above examples are merely illustrative 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 charging inlets of electric vehicles, A charging inlet body (1); At least one connector (2) removably connected to the charging inlet body (1); A back cover (3) removably 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. A high voltage interlock structure for a charging inlet of an electric vehicle, comprising:

2. Each of the high voltage interlock connectors includes a male connection portion (4) and a female connection portion (5) that are plugged 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 one-to-one correspondence.

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

3. The connector (2) and / or the back cover (3) further include an attachment portion (6), The mounting portion (6) is either integrally injection molded or removably connected to the male connector portion (4). The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 2.

4. The male connector (4) includes a conductive material and is U-shaped or V-shaped, with both ends of the U-shape or V-shape protruding from a mounting surface (61) of the mounting portion (6). The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 3.

5. The tip of the U-shaped or V-shaped male connector (4) is chamfered or rounded. The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 4.

6. 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, and both ends of the U-shape or V-shape protrude from the bottom surface of the cavity. The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 3.

7. Each of the female connection parts (5) includes an interlock connection base (51) and two connection terminals (52), the interlock connection base (51) is provided with two through holes (513), and the two connection terminals (52) are attached to the corresponding through holes (513), 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). The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 2.

8. The connecting terminal (52) further includes a locking piece provided on one of the outer periphery of the connecting 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 connecting terminal (52) and the inner wall of the corresponding through hole (513). The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 7.

9. Each of the interlock connection stands (51) is either integrally injection molded with the charging inlet body (1) or detachably connected thereto. The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 7.

10. 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) and electrically connected to the connector terminals (52) therein. The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 7.

11. The contact resistance between the male connector (4) and the connector terminal (52) is less than 9 mΩ. The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 6.

12. 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 an attachment portion (6) of the connector (2) or the back cover (3) and has a U- or V-shape; the attachment portion (6) further includes a cavity with one end open, and both ends of the U- or V-shape protrude from a 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. The high voltage interlock structure for a charging inlet of an electric vehicle according to claim 7.

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

14. 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.

15. 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.

16. 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 15, the charging terminal (21) is connected to the cable and provided on the charging inlet body (1) 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 part (4) and the female connection part (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:

17. The charging terminal (21) and the mating terminal (11) of the other end are connected to conduct current, and the charging terminal (21) and the mating terminal (11) are not separated immediately before the connection between the male connection part (4) and the female connection part (5) is cut off.

17. The charging device according to claim 16.

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