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 a charging connector cannot be self-cleaned and is easily burned out due to heat generation during charging, an automatic charging connector for an electric vehicle is provided, comprising: 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 arranged in an annular manner along the circumference of the first connection end, the power receiving contacts are arranged in a discrete arrangement on a single ring, the power receiving contacts on two adjacent rings are staggered at an angle α along the circumference, a 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 in an spaced manner along the circumference of the second connection end; when the first connection end is electrically connected to the second connection end, at least some of the plurality of charging contacts are in abutment contact with at least some of the plurality of power receiving 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] According to an embodiment of the present invention, an automatic charging connector for an electric vehicle comprises: a first connection end and a second connection end, wherein the first connection end is arranged at the bottom of the charging vehicle, and the outer surface of the first connection end is provided with a plurality of power receiving contacts arranged in a ring-shaped manner along the circumference of the first connection end; wherein the power receiving contacts are arranged in a discrete arrangement on a single ring, and the power receiving contacts on two adjacent rings are staggered at an angle α along the circumference, and the second connection end is arranged on a driving bracket, and the 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 in a spaced manner along the circumference of the second connection end; when the first connection end is electrically connected to the second connection end, at least some of the plurality of charging contacts are in abutment contact with at least some of the plurality of power receiving contacts.

[0005] According to one embodiment of the present invention, the plurality of power receiving contacts form a plurality of coaxially arranged power receiving contact groups, each of the power receiving contact groups comprising a plurality of power receiving contacts arranged at equal intervals along the circumference of the first connection end; the plurality of charging contacts form a plurality of coaxially arranged charging contact groups, each of the charging contact groups comprising a plurality of charging contacts arranged at equal intervals along the circumference of the second connection end; the plurality of power receiving contact groups correspond one-to-one to the plurality of charging contact groups.

[0006] According to one embodiment of the present invention, the cross-sectional shape of the charging contact is circular, the cross-sectional shape of the receiving contact extends along the circumference of the first connection end, and the distance between adjacent receiving contacts in the same receiving contact group is greater than the length of the receiving contact.

[0007] According to an embodiment of the present invention, opposite sides of adjacent power receiving contacts are chamfered.

[0008] According to an embodiment of the present invention, in the cross-sectional shape of the power receiving contact, the width of the portions adjacent to both ends gradually decreases in the direction from the middle to the ends.

[0009] According to an embodiment of the present invention, both the outer surface of the first connection end and the outer surface of the second connection end are provided with air guide holes, and the air guide holes are arranged adjacent to the center of the automatic charging connector.

[0010] According to one embodiment of the present invention, it also includes: an air source component, 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.

[0011] According to one embodiment of the present invention, the first connection end is defined by a mating groove open downward, the power receiving contacts are all arranged on the top of the mating groove, and 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.

[0012] According to one embodiment of the present invention, the outer diameter of the upper portion of the second connection end gradually increases from top to bottom, and the inner diameter of the lower portion of the first connection end gradually decreases from bottom to top.

[0013] According to one embodiment of the present invention, at least one of the charging contact and the power receiving 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.

[0014] 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 setting discretely arranged power receiving contacts and charging contacts, not only can the stable connection between the charging contacts and the power receiving contacts be ensured, but also the gap between the charging contacts and the power receiving contacts can be increased, thereby providing convenience for the heat dissipation of the automatic charging connector, improving the heat dissipation efficiency, and preventing safety accidents caused by heat accumulation during the charging process of the automatic charging connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a first connection end according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic structural diagram of a second connection end according to an embodiment of the present invention;

[0017] Figure 3is a cross-sectional view of a second connecting end of an embodiment of the present invention;

[0018] Figure 4 is a cross-sectional view of a first connecting end of an embodiment of the present invention;

[0019] Figure 5 A schematic structural diagram of a first connection end according to another embodiment of the present invention;

[0020] Figure 6 A schematic diagram of a partial structure of a first connection end according to an embodiment of the present invention.

[0021] In the figure:

[0022] 1: second connection end; 2: first connection end; 3: charging contact; 4: power receiving contact; 5: air guide hole; 6: matching groove; 7: extension section; 8: chamfer. 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 1-6 As shown, the automatic charging connector for an electric vehicle according to an embodiment of the present invention includes: a first connection end 2, a second connection end 1 and an air source component.

[0025] The first connection terminal 2 is arranged at the bottom of the charging vehicle, and the outer surface of the first connection terminal 2 is provided with a plurality of power receiving contacts 4 arranged in annular intervals along the circumference of the first connection terminal 2; wherein, the power receiving contacts 4 are arranged in a discrete arrangement on a single ring, and the power receiving contacts 4 on two adjacent rings are staggered at an angle α along the circumference, thereby increasing the creepage distance between the power receiving contacts 4 of the two adjacent rings, and preventing the two power receiving contacts from being too close to cause a safety accident, the second connection terminal 1 is arranged on the driving bracket, the driving bracket drives the second connection terminal 1 to be electrically connected to the first connection terminal 2, and the outer surface of the second connection terminal 1 is provided with a plurality of charging contacts 3 arranged in annular intervals along the circumference of the second connection terminal 1; when the first connection terminal 2 is electrically connected to the second connection terminal 1, at least some of the multiple charging contacts 3 are in abutment contact with at least some of the multiple power receiving contacts 4, and the discretely distributed power receiving contacts 4 and the charging contacts 3, during the matching process, some of the charging contacts 3 are always in contact with some of the power receiving contacts 4, thereby ensuring the connection reliability between the first connection terminal and the second connection terminal.

[0026] According to the automatic charging connector of the electric vehicle of the embodiment of the present invention, by setting discretely arranged power receiving contacts 4 and charging contacts 3, not only can the stable connection between the charging contacts 3 and the power receiving contacts 4 be ensured, but also the gap between the charging contacts 3 and the power receiving contacts 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.

[0027] Among them, the lower surface of the first connection terminal 2 and the upper surface of the second connection terminal 1 are both provided with air guide holes 5 connected to the air source component. The first connection terminal 2 and the second connection terminal 1 are both provided with insulating parts, and the charging contact 3 and the power receiving contact 4 are both provided on the insulating parts. By providing the air source component and the air guide hole 5, the air source component is used to guide air from the air guide hole 5, and the gas ejected from the air guide hole 5 is used to clean up the debris between the first connection terminal 2 and the second connection terminal 1, which provides convenience for the first connection terminal 2 and the second connection terminal 1 to cooperate, and the charging contact 3 and the power receiving contact 4 to cooperate, and the heat can be taken away during the gas flow, which is beneficial to improve the heat dissipation efficiency of the first connection terminal 2 and the second connection terminal 1 during charging cooperation, and prevent the heat from concentrating and damaging the automatic charger.

[0028] According to one embodiment of the present invention, a plurality of power receiving contacts 4 form a plurality of coaxially arranged power receiving contact groups, each power receiving contact group includes a plurality of power receiving contacts 4 arranged at equal intervals along the circumference of the first connection end 2; a plurality of charging contacts 3 form a plurality of coaxially arranged charging contact groups, each charging contact group includes a plurality of charging contacts 3 arranged at equal intervals along the circumference of the second connection end 1; and a plurality of power receiving contact groups correspond one to one to a plurality of charging contact groups.

[0029] In the circumferential direction of the first connection end 2 , the power receiving contacts 4 in adjacent power receiving contact groups are arranged alternately in sequence, and in the circumferential direction of the second connection end 1 , the charging contacts 3 in adjacent charging contact groups are arranged alternately in sequence.

[0030] By setting up multiple groups of receiving contact groups and multiple groups of charging contact groups, the positive and negative poles of the charging circuit can be set separately, and the contact area between the charging contact 3 and the receiving contact 4 can be increased. By setting multiple charging contacts 3 in each charging contact group and multiple receiving contacts 4 in each receiving contact group, the rated current between the entire charging contact group and the receiving contact group can be increased, preventing damage caused by excessive current between a single charging contact 3 and a single receiving contact 4.

[0031] According to one embodiment of the present invention, the cross-sectional shape of the charging contact 3 is circular, the cross-sectional shape of the receiving contact 4 extends along the circumference of the first connection end 2, and the distance between adjacent receiving contacts 4 in the same receiving contact group is greater than the length of the receiving contact 4. The receiving contacts 4 arranged at intervals can promote the diffusion of heat and prevent the heat generated during the charging process from being too concentrated and causing damage. It can also ensure that each receiving contact 4 can be connected to the corresponding charging contact 3 to complete charging.

[0032] like Figure 6 As shown, according to one embodiment of the present invention, chamfers 8 are provided on opposite sides of adjacent power receiving contacts 4, and in the cross-sectional shape of the power receiving contacts 4, the width of the adjacent two end portions gradually decreases in the direction from the middle to the end. By providing chamfers 8 between two adjacent power receiving contacts 4, the electrical clearance and creepage distance can be increased by 3 to 6 mm. At the same time, the power receiving contacts 4 can be provided with a lengthening section 7 at the center part on the basis of the chamfers 8, so as to make the charging contacts 3 and the power receiving contacts 4 contact as much as possible when the intervals are grouped.

[0033] 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 contacts 3 are respectively the positive pole, the negative pole, the PE pole and the CP pole from the outside to the inside, and the receiving contacts 4 correspond thereto, and are respectively the positive pole, the negative pole, the PE pole and the CP pole from the outside to the inside. By setting the chamfer 8 and the lengthening shortening 7, the distance between the positive and negative pole contacts can reach 8.2 mm, and the distance between the PE pole and the CP pole is appropriately reduced, and the distance between the positive and negative pole contacts can reach 10 mm. During the charging process, the positive and negative poles can meet a maximum charging voltage of 1000 V, which greatly improves the charging efficiency.

[0034] According to one embodiment of the present invention, the air guide hole 5 is arranged on the lower surface of the first connecting end 2, and the air guide hole 5 is arranged near the center of the lower surface of the first connecting end 2; and / or, the air guide hole 5 is arranged on the upper surface of the second connecting end 1, and the air guide hole 5 is arranged near the center of the upper surface of the second connecting end 1.

[0035] According to one embodiment of the present invention, the air source assembly includes a first air pump arranged on the first connecting end 2 and a second air pump arranged on the second connecting end 1, the first air pump is connected to the air guide hole 5 on the first connecting end 2, and the second air pump is connected to the air guide hole 5 on the second connecting end 1.

[0036] By providing the first air pump and the second air pump, it is ensured that the first connecting end 2 and the air guide holes 5 on the connecting end can both spray gas, thereby improving the cleaning and heat dissipation effects of the first connecting end 2 and the second connecting end 1 .

[0037] 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.

[0038] 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.

[0039] According to one embodiment of the present invention, at least one of the charging contact 3 and the receiving contact 4 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.

[0040] 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) arranged in a ring-shaped interval along the circumference of the first connection end (2); wherein the power receiving contacts (4) are arranged in a discrete arrangement on a single ring, and the power receiving contacts (4) on two adjacent rings are staggered at an angle α along the circumference; 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 outer surface of the second connection end (1) being provided with a plurality of charging contacts (3) spaced apart along the circumference of the second connection end (1); when the first connection end (2) is electrically connected to the second connection end (1), at least some of the plurality of charging contacts (3) are in abutment contact with at least some of the plurality of receiving contacts (4); The plurality of power receiving contacts (4) form a plurality of coaxially arranged power receiving contact groups, each of the power receiving contact groups comprising a plurality of power receiving contacts (4) arranged at equal intervals along the circumference of the first connection end (2); The plurality of charging contacts (3) form a plurality of coaxially arranged charging contact groups, each of the charging contact groups comprising a plurality of charging contacts (3) arranged at equal intervals along the circumference of the second connection end (1); The plurality of power receiving contact groups correspond one to one with the plurality of charging contact groups; The cross-sectional shape of the charging contact (3) is circular, the cross-sectional shape of the power receiving contact (4) extends along the circumference of the first connection end (2), and the distance between adjacent power receiving contacts (4) in the same power receiving contact group is greater than the length of the power receiving contact (4).

2. The automatic charging connector for electric vehicles according to claim 1, characterized in that: The opposite sides of the adjacent power receiving contacts (4) are provided with chamfers (8).

3. The automatic charging connector for electric vehicles according to claim 1, characterized in that: In the cross-sectional shape of the power receiving contact (4), the width of the portions adjacent to both ends gradually decreases in the direction from the middle to the ends.

4. The automatic charging connector for electric vehicles according to claim 1, characterized in that: An external connection surface of the first connection end (2) and an external connection surface of the second connection end (1) are both provided with an air guide hole (5), and the air guide hole (5) is arranged adjacent to the center of the automatic charging connector.

5. The automatic charging connector for electric vehicles according to claim 4, characterized in that: Also includes: An air source component, the air source component comprising a first air pump arranged on the first connecting end (2) and a second air pump arranged on the second connecting end (1), the first air pump being connected to an air guide hole (5) on the first connecting end (2), and the second air pump being connected to an air guide hole (5) on the second connecting end (1).

6. 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, the power receiving contacts (4) are all arranged on the top of the mating groove (6), and 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).

7. The automatic charging connector for electric vehicles according to claim 6, characterized in that: The outer diameter of the upper portion of the second connecting end (1) gradually increases in a direction from top to bottom, and the inner diameter of the lower portion of the first connecting end (2) gradually decreases in a direction from bottom to top.

8. The automatic charging connector for electric vehicles according to claim 1, characterized in that: At least one of the charging contact (3) and the receiving contact (4) 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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