Automatic charging connector for electric vehicle

Abstract

The present invention relates to the technical field of electric vehicle charging equipment. In order to solve the problem that the charging connector cannot be self-cleaned and is easily burned out due to heat during charging, an automatic charging connector for an electric vehicle is provided, including: a first connection end and a second connection end, the outer surface of the first connection end is provided with a plurality of power receiving contacts extending along the circumference of the first connection end, and the distances of the plurality of power receiving contacts from the center of the first connection end are all different, in the radial direction of the first connection end, adjacent power receiving contacts are arranged at intervals along the circumference of the first connection end, a driving bracket drives the second connection end to be electrically connected to the first connection end, and the outer surface of the second connection end is provided with a plurality of charging contacts arranged along the circumference of the second connection end; when the first connection end is electrically connected to the second connection end, the power receiving contact stops contacting with some of the plurality of charging contacts, thereby improving the matching stability and reliability of the charging contacts and the power receiving contacts.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging equipment, and in particular to an automatic charging connector for an electric vehicle. Background Art

[0002] With the development of autonomous driving and automatic parking technology, unattended automatic charging has become an inevitable trend in the development of electric vehicle branch operations. In places such as on both sides of the highway where parking space is limited and suitable for discrete charging piles, the performance of the charging mechanism needs to be improved accordingly in view of the completely unmanned and autonomous charging characteristics of the electric vehicle automatic charging process. The automatic charging connector in the related technology has a close distance between adjacent contacts during use and poor heat dissipation, which seriously affects the charging efficiency. Summary of the invention

[0003] In order to solve the problem that the charging connector does not meet the mechanical connection and plug-in characteristics and has low heat dissipation efficiency during operation, the present invention provides an automatic charging connector for an electric vehicle.

[0004] The present invention aims to solve the problem that the charging connector does not meet the mechanical connection and plug-in characteristics and has low heat dissipation efficiency during operation.

[0005] According to an embodiment of the present invention, an automatic charging connector for an electric vehicle includes: a first connection end and a second connection end, the first connection end is arranged at the bottom of the charging vehicle, the outer surface of the first connection end is provided with a plurality of power receiving contacts extending along the circumference of the first connection end, and the distances of the plurality of power receiving contacts from the center of the first connection end are all different, in the radial direction of the first connection end, adjacent power receiving contacts are arranged at intervals along the circumference of the first connection end, the second connection end is arranged on a driving bracket, the driving bracket drives the second connection end to be electrically connected to the first connection end, the outer surface of the second connection end is provided with a plurality of charging contacts arranged along the circumference of the second connection end; when the first connection end is electrically connected to the second connection end, the power receiving contact stops contacting with some of the plurality of charging contacts.

[0006] According to an embodiment of the present invention, the angle formed by the two ends of the power receiving contact and the center of the first connection end is α, and 90°≤α≤180°.

[0007] According to an embodiment of the present invention, in the radial direction of the first connection end, a line connecting the centers of adjacent power receiving contacts passes through the center of the first connection end.

[0008] According to one embodiment of the present invention, all of the charging contacts are divided into a plurality of charging contact groups, each of the charging contact groups includes a plurality of charging contacts arranged along the circumference of the second connection end, and in the radial direction of the second connection end, adjacent charging contact groups are spaced apart along the circumference of the second connection end.

[0009] According to one embodiment of the present invention, the number of the charging contact groups is the same as the number of the power receiving contacts. When the first connection end is electrically connected to the second connection end, the multiple charging contact groups correspond to the multiple power receiving contacts one by one, and the power receiving contacts are in abutment contact with at least some of the charging contacts in the corresponding charging contact groups.

[0010] According to an embodiment of the present invention, in the circumferential direction of the second connection end, the angle formed by the charging contacts at both ends of the charging contact group and the center of the second connection end is β, and 90°≤β≤180°.

[0011] According to one embodiment of the present invention, α≤β.

[0012] According to one embodiment of the present invention, it also includes: an air source component, the outer surface of the first connecting end and the outer surface of the second connecting end are both provided with air guide holes, the air source component includes a first air pump arranged on the first connecting end and a second air pump arranged on the second connecting end, the first air pump is connected to the air guide hole on the first connecting end, and the second air pump is connected to the air guide hole on the second connecting end.

[0013] According to one embodiment of the present invention, the first connection end is defined by a mating groove open downward, and the power receiving contacts are all arranged on the top of the mating groove. When the first connection end is mated with the second connection end, the second connection end is at least partially accommodated in the mating groove, and the outer diameter of the upper part of the second connection end gradually increases from top to bottom, and the inner diameter of the lower part of the first connection end gradually decreases from bottom to top.

[0014] According to one embodiment of the present invention, the charging contact is a waterproof elastic contact electrode, and at least one of the first connection end and the second connection end is provided with a vibration component for controlling the vibration grinding of the waterproof elastic contact electrode for self-cleaning.

[0015] Technical effect of the present invention: According to the automatic charging connector of the electric vehicle according to the embodiment of the present invention, by providing a power receiving contact extending along the circumference of the first connection end and a charging contact arranged along the circumference of the second connection end, not only can the stable connection between the charging contact and the power receiving contact be ensured, but also the gap between the charging contact and the power receiving contact can be increased, thereby providing convenience for the heat dissipation of the automatic charging connector, improving the heat dissipation efficiency, and preventing the heat accumulation of the automatic charging connector during charging to cause safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a first connection end according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic structural diagram of a second connection end according to an embodiment of the present invention;

[0018] Figure 3 is a schematic structural diagram of a second connection end according to another embodiment of the present invention;

[0019] Figure 4 is a cross-sectional view of a second connecting end of an embodiment of the present invention;

[0020] Figure 5 4 is a cross-sectional view of a first connecting end according to an embodiment of the present invention.

[0021] In the figure:

[0022] 1: Second connection terminal; 2: First connection terminal; 3: Charging contact; 4: Power receiving contact; 5: Air guide hole; 6: Matching groove. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] like Figure 1-5 As shown, the automatic charging connector for an electric vehicle according to an embodiment of the present invention includes: a first connection end 2 and a second connection end 1.

[0025] The first connection terminal 2 is arranged at the bottom of the charging car, and the external surface of the first connection terminal 2 is provided with a plurality of power receiving contacts 4 extending along the circumference of the first connection terminal 2, and the distances between the plurality of power receiving contacts 4 and the center of the first connection terminal 2 are all different. In the radial direction of the first connection terminal 2, adjacent power receiving contacts 4 are arranged spaced apart along the circumference of the first connection terminal 2. The second connection terminal 1 is arranged on the driving bracket, and the driving bracket drives the second connection terminal 1 to be electrically connected to the first connection terminal 2. The external surface of the second connection terminal 1 is provided with a plurality of charging contacts 3 arranged along the circumference of the second connection terminal 1.

[0026] When the first connection terminal 2 is electrically connected to the second connection terminal 1, the power receiving contact 4 is in contact with some of the charging contacts 3 among the multiple charging contacts 3. During the mating process, the charging contacts 3 are always in contact with some of the power receiving contacts 4, ensuring the connection reliability between the first connection terminal 2 and the second connection terminal 1.

[0027] According to the automatic charging connector of the electric vehicle of the embodiment of the present invention, by providing the power receiving contact 4 extending along the circumference of the first connection end 2 and the charging contact 3 arranged along the circumference of the second connection end 2, not only can the stable connection between the charging contact 3 and the power receiving contact 4 be ensured, but also the gap between the charging contact 3 and the power receiving contact 4 can be increased, which provides convenience for the heat dissipation of the automatic charging connector, improves the heat dissipation efficiency, and prevents the heat accumulation of the automatic charging connector during charging to cause safety accidents.

[0028] According to one embodiment of the present invention, the angle formed by the two ends of the power receiving contact 4 and the center of the first connection end 2 is α, 90°≤α≤180°, that is, the central angle corresponding to the arc-shaped power receiving contact 4 is 90°-180°, which can not only increase the length of the power receiving contact 4 to prevent damage caused by excessive current, but also provide convenience for the power receiving contact 4 to connect to the charging port 4, and reserve sufficient heat dissipation space for adjacent power receiving contacts 4 to prevent heat accumulation.

[0029] According to one embodiment of the present invention, in the radial direction of the first connecting end 2, the connecting line between the centers of adjacent power receiving contacts 4 passes through the center of the first connecting end 2, that is, the two power receiving contacts 4 are connected at both ends of a diameter of the first connecting end 2, thereby further increasing the distance between the two power receiving contacts 4 to prevent safety accidents caused by too close a distance.

[0030] According to one embodiment of the present invention, all charging contacts 3 are divided into a plurality of charging contact groups, each charging contact group includes a plurality of charging contacts 3 arranged along the circumference of the second connection end 1, and in the radial direction of the second connection end 1, adjacent charging contact groups are spaced apart along the circumference of the second connection end 1. The number of charging contact groups is the same as the number of power receiving contacts 4, and when the first connection end 2 is electrically connected to the second connection end 1, the plurality of charging contact groups correspond to the plurality of power receiving contacts 4 one by one, and the power receiving contacts 4 are in abutment contact with at least some of the charging contacts 3 in the corresponding charging contact groups.

[0031] The charging contact group of the above structure can correspond to the power receiving contact 4, which can increase the contact area between the power receiving contact 4 and the charging contact group, thereby increasing the current. In this embodiment, taking the first connection end 2 and the second connection end 1 with a diameter of 100 mm as an example, the charging contact group is respectively positive, negative, PE and CP from the outside to the inside, and the power receiving contact 4 corresponds to it, which is respectively positive, negative, PE and CP from the outside to the inside. The distance between the positive and negative poles can reach 16 mm, and the distance between the PE pole and the CP pole can be appropriately reduced. The distance between the positive and negative poles can reach 20 mm. During the charging process, the positive and negative poles can meet a maximum charging voltage of 1500 V, which greatly improves the charging efficiency, and can reduce the number of charging contacts and reduce costs.

[0032] According to one embodiment of the present invention, in the circumferential direction of the second connection end 1, the angle formed by the charging contacts 3 at both ends of the charging contact group and the center of the second connection end 1 is β, 90°≤β≤180°, and α≤β. By appropriately increasing the β angle, an appropriate operating space can be reserved for the first connection end 2 and the second connection end 1 during the matching process, and when the first connection end 2 and the second connection end 1 are connected, a small angle rotation will not affect the stable connection between the charging contact group and the power receiving contact 4.

[0033] According to one embodiment of the present invention, it also includes: an air source component, the outer surface of the first connection end 2 and the outer surface of the second connection end 1 are both provided with air guide holes 5, the air source component includes a first air pump provided on the first connection end 2 and a second air pump provided on the second connection end 1, the first air pump is connected to the air guide holes 5 on the first connection end 2, and the second air pump is connected to the air guide holes 5 on the second connection end 1. A part of the air guide holes 5 are provided on the lower surface of the first connection end 2, and the air guide holes 5 are provided near the center of the lower surface of the first connection end 2; another part of the air guide holes 5 are provided on the upper surface of the second connection end 1, and the air guide holes 5 are provided near the center of the upper surface of the second connection end 1. The air source component includes a first air pump provided on the first connection end 2 and a second air pump provided on the second connection end 1, the first air pump is connected to the air guide holes 5 on the first connection end 2, and the second air pump is connected to the air guide holes 5 on the second connection end 1. By providing the first air pump and the second air pump, it is ensured that the air guide holes 5 on the first connection end 2 and the connection end can both spray gas, thereby improving the cleaning and heat dissipation effects of the first connection end 2 and the second connection end 1.

[0034] According to one embodiment of the present invention, the first connection end 2 is defined by a mating groove 6 open downward, and the power receiving contacts 4 are all arranged on the top of the mating groove 6. When the first connection end 2 is mated with the second connection end 1, the second connection end 1 is at least partially accommodated in the mating groove 6, and the outer diameter of the upper part of the second connection end 1 gradually increases from top to bottom, and the inner diameter of the lower part of the first connection end 2 gradually decreases from bottom to top.

[0035] By providing the mating groove 6 of the above structure, it can provide convenience for the mating of the first connection end 2 and the second connection end 1, and can improve the mating stability of the first connection end 2 and the second connection end 1, and prevent the first connection end 2 and the second connection end 1 from shaking when mating, which affects the contact stability between the power receiving contact 4 and the charging contact 3.

[0036] According to one embodiment of the present invention, the charging contact 3 is a waterproof elastic contact electrode, which can not only prevent water from entering and causing accidents, but also use elasticity to improve the connection stability between the charging contact 3 and the receiving contact 4. At least one of the first connection end 2 and the second connection end 1 is provided with a vibration component for controlling the waterproof elastic contact electrode to vibrate and grind for self-cleaning, to prevent dust from accumulating on the charging connector and the receiving connector due to long-term use and affecting the conductivity between the charging connector and the receiving connector.

[0037] The above are preferred implementation modes of the present invention. Those skilled in the art to which the present invention belongs can also change and modify the above implementation modes. Therefore, the present invention is not limited to the above specific implementation modes. Any obvious improvements, substitutions or modifications made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention.

Claims

1. An automatic charging connector for an electric vehicle, characterized in that: include: A first connection end (2), the first connection end (2) being arranged at the bottom of the charging vehicle, the outer surface of the first connection end (2) being provided with a plurality of power receiving contacts (4) extending along the circumference of the first connection end (2), the plurality of power receiving contacts (4) being at different distances from the center of the first connection end (2), and in the radial direction of the first connection end (2), adjacent power receiving contacts (4) being arranged at intervals along the circumference of the first connection end (2); a second connection end (1), the second connection end (1) being arranged on a driving bracket, the driving bracket driving the second connection end (1) to be electrically connected to the first connection end (2), the external surface of the second connection end (1) being provided with a plurality of charging contacts (3) arranged along the circumference of the second connection end (1); when the first connection end (2) is electrically connected to the second connection end (1), the power receiving contact (4) is in abutment contact with some of the plurality of charging contacts (3); The angle formed by the two ends of the power receiving contact (4) and the center of the first connecting end (2) is α, and 90°≤α≤180°.

2. The automatic charging connector for electric vehicles according to claim 1, characterized in that: In the radial direction of the first connection end (2), a line connecting the centers of adjacent power receiving contacts (4) passes through the center of the first connection end (2).

3. The automatic charging connector for electric vehicles according to claim 1, characterized in that: All of the charging contacts (3) are divided into a plurality of charging contact groups, each of the charging contact groups comprising a plurality of charging contacts (3) arranged along the circumference of the second connection end (1), and in the radial direction of the second connection end (1), adjacent charging contact groups are spaced apart along the circumference of the second connection end (1).

4. The automatic charging connector for electric vehicles according to claim 3, characterized in that: The number of the charging contact point groups is the same as the number of the power receiving contacts (4); when the first connection end (2) is electrically connected to the second connection end (1), the plurality of charging contact point groups correspond to the plurality of power receiving contacts (4) one by one, and the power receiving contacts (4) are in abutment contact with at least some of the charging contacts in the corresponding charging contact point groups.

5. The automatic charging connector for electric vehicles according to claim 4, characterized in that: In the circumferential direction of the second connection end, the included angle formed by the charging contacts at both ends of the charging contact group and the center of the second connection end is β, and 90°≤β≤180°.

6. The automatic charging connector for electric vehicles according to claim 5, characterized in that: α≤β。 7. The automatic charging connector for electric vehicles according to claim 1, characterized in that: Also includes: An air source component, wherein an outer surface of the first connecting end (2) and an outer surface of the second connecting end (1) are both provided with air guide holes (5), and the air source component comprises a first air pump provided on the first connecting end (2) and a second air pump provided on the second connecting end (1), the first air pump being connected to the air guide hole (5) on the first connecting end (2), and the second air pump being connected to the air guide hole (5) on the second connecting end (1).

8. The automatic charging connector for electric vehicles according to claim 1, characterized in that: The first connection end (2) defines a mating groove (6) which is open downwards, and the power receiving contacts (4) are all arranged on the top of the mating groove (6). When the first connection end (2) is mated with the second connection end (1), the second connection end (1) is at least partially accommodated in the mating groove (6), and the outer diameter of the upper part of the second connection end (1) gradually increases from top to bottom, and the inner diameter of the lower part of the first connection end (2) gradually decreases from bottom to top.

9. The automatic charging connector for electric vehicles according to claim 1, characterized in that: The charging contact (3) is a waterproof elastic contact electrode, and at least one of the first connection end (2) and the second connection end (1) is provided with a vibration component for controlling the waterproof elastic contact electrode to vibrate and grind for self-cleaning.

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