Bottom-mounted high-power charging interface suitable for automatic charging of electric automobile

Abstract

The invention relates to a bottom-mounted high-power charging interface suitable for automatic charging of an electric vehicle, which comprises a vehicle end interface and a pile end interface, the interfaces adopt disc-shaped structures, and all electrodes adopt concentric annular structures and are arranged on a disc.

Description

Technical Field

[0001] The invention belongs to the field of electric vehicle charging, and in particular relates to a bottom-mounted high-power charging interface suitable for automatic charging of an electric vehicle. Background Art

[0002] In recent years, electric vehicles have developed rapidly, and the number of electric vehicles in the market has increased rapidly, which has reduced tail gas emissions and reduced the demand for oil. As user demand gradually increases, various new electric vehicle technologies have developed rapidly, especially the development of large-capacity, high-power power battery technology and autonomous driving technology, which can bring better services to users and have attracted the attention of the whole society.

[0003] As the capacity of electric vehicle power batteries increases and the charging and discharging power increases, higher and higher requirements are placed on the charging power of electric vehicles. The current actual charging interface can reach 1000V and 600A under active liquid cooling. If the power is to be increased, the volume and weight of the charging interface will inevitably increase, making it inconvenient to operate by hand. At the same time, due to the development of autonomous driving technology, autonomous driving vehicles are rapidly being used, and there is also a demand for fully automatic high-power charging. The use of mechanical devices to perform automated plug-in operations of high-power charging interfaces can solve the above problems. Therefore, the present invention designs a high-power charging interface suitable for fully automatic charging and installed at the bottom of the vehicle, which can achieve high-power charging with a maximum voltage of more than 2000V and a maximum current of more than 1000A, meeting the needs of future high-power automatic charging. Summary of the invention

[0004] Existing electric vehicle charging interfaces mainly use manual plug-in operation. As the power increases, the volume and weight also increase synchronously, which makes manual operation inconvenient. The purpose of the present invention is to provide a high-power charging interface installed at the bottom of the vehicle suitable for automatic charging of electric vehicles, thereby solving the problem of high-power automatic charging operation. First, a disc-shaped high-power charging interface suitable for the bottom of an electric vehicle is designed; secondly, all electrodes are designed as concentric rings, and finally the main electrode part of the interface is designed for liquid cooling. Compared with previous charging interfaces, the innovation of the present invention is that the charging interface is disc-shaped and has a small thickness. The vehicle-end interface is installed at the bottom of the electric vehicle, occupying a small space at the bottom of the vehicle, and the pile-end interface is installed on the ground and does not need to be installed below the ground. The ring electrode can adapt to different deflection angles when the electric vehicle is parked, reducing parking requirements.

[0005] 1. A bottom-mounted high-power charging interface suitable for automatic charging of electric vehicles, characterized in that the plug-in parts of the vehicle-end interface and the pile-end interface both adopt a disc-type structure, thereby reducing the space occupied in the height direction of the bottom of the vehicle and reducing the thickness of the pile-end interface part, so that it can be directly installed on the ground without opening a hole in the ground and without installing below the ground.

[0006] 2. The outermost insulating plastic part of the pile end interface is designed as an inward annular guide slope. When the vehicle and pile interface are connected, even if there is a slight deviation, they can be smoothly inserted through the guide slope.

[0007] 3. The main electrodes of the charging interface, DC+ and DC-, adopt a ring structure and are arranged at the outermost periphery with the largest electrode area. The thickness of the insulating medium between DC+ and DC- is the largest, which can improve the withstand voltage level.

[0008] 4. The positive (A+) and negative (A-) low-voltage auxiliary power supply of the pile-end interface are approximately semi-circular, and the positive (A+) and negative (A-) low-voltage auxiliary power supply of the vehicle-end interface are 1 / 36 circular. In this way, when the vehicle has a deflection angle, the vehicle-end interface and the pile-end interface can still be plugged in, and the vehicle-end can be plugged in smoothly even if the vehicle has a large deflection angle.

[0009] 5. The charging connection confirmation (CC1), charging connection confirmation (CC2), charging communication CAN H (S+), and charging communication CAN L (S-) of the pile end interface are approximately 1 / 4 ring, and the charging connection confirmation (CC1), charging connection confirmation (CC2), charging communication CAN H (S+), and charging communication CAN L (S-) of the vehicle end interface are 1 / 36 ring. In this way, when the vehicle has a deflection angle, the vehicle end interface and the pile end interface can still be plugged in, and the vehicle end can be plugged in smoothly within the deflection angle range of 75 degrees.

[0010] 6. The height of the protective grounding electrode (PE) at the pile end interface is higher than other electrodes. During the docking process, the PE electrode at the vehicle end interface can be docked first, and the grounding electrode is connected first, so that the protective grounding between the vehicle and the earth is connected first to ensure charging safety.

[0011] 7. An annular liquid cooling pipeline is buried in the insulation layer between the positive (DC+) and negative (DC-) DC power supply of the main electrode of the pile end interface. The coolant quickly conducts the heat of the main electrode of the charging plug to increase the current carrying capacity.

[0012] 8. After the vehicle-end interface and the pile-end interface are fully plugged in, a certain gap is still left between the top of the terminal and the guide slope to prevent dust accumulation after long-term use, which may cause the interfaces at both ends to be unable to be fully and reliably connected.

[0013] The beneficial effects of the present invention are as follows: a high-power charging interface installed at the bottom of a vehicle suitable for automatic charging of electric vehicles is disclosed, which occupies a small height space, and both ends of the interface can be installed on the bottom of the vehicle and the ground respectively. Through an automatic mechanical device, the automatic plugging of the high-power charging interface is realized, thereby realizing high-voltage and high-current charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, and they all belong to the protection scope of the present invention.

[0015] Figure 1 This is the top view of the vehicle-side interface;

[0016] Figure 2 This is the cross-sectional view of the vehicle-side interface;

[0017] Figure 3 It is the top view of the pile end interface;

[0018] Figure 4 It is the cross-sectional view of the pile end interface;

[0019] Figure 5 It is the cross-sectional view of the vehicle end and the pile end plug-in;

[0020] Figure 6 The main dimension diagram A is shown;

[0021] Figure 7 Figure B is the main dimension. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The present invention discloses a high-power charging interface installed at the bottom of an electric vehicle suitable for automatic charging of an electric vehicle, which is specifically implemented according to the following steps:

[0024] A bottom-mounted high-power charging interface suitable for automatic charging of electric vehicles, the plug-in parts of the vehicle-end interface and the pile-end interface are both disc-type structures, the vehicle-end interface part, including the mounting flange, has a depth and width dimension of 250 mm, and a thickness including the flange of 53 mm, thereby reducing the space occupied in the height direction of the bottom of the vehicle; the pile-end interface part, including the mounting flange, has a depth and width dimension of 250 mm, and a thickness including the flange of 62.32 mm, thereby reducing the thickness of the pile-end interface part, so that it can be directly installed on the ground without the need to open a hole on the ground or install it below the ground. The charging interface is operated at the bottom, which also reduces the requirements for waterproofing of the charging interface.

[0025] The outermost insulating plastic part of the pile end interface is designed as an inward annular guide slope with an inclination angle of 30 degrees. When the vehicle and pile interface are docked, even if there is a small deviation, they can be smoothly inserted through the guide slope.

[0026] The main electrodes of the charging interface, the DC+ and DC-, are arranged in a ring structure, with the DC+ outside and the DC- inside. The circumference of the electrode DC- is 22.68 mm, and the axial height is 22.68 mm. The electrode area is large, and a larger current can pass through, with a maximum current of more than 1000A. The thickness of the insulating medium between DC+ and DC- is the largest, at 20 mm, which can improve the withstand voltage level, and the maximum voltage between DC+ and DC- can exceed 2000V.

[0027] The positive (A+) and negative (A-) low-voltage auxiliary power supply of the pile-end interface are approximately semi-circular, and the positive (A+) and negative (A-) low-voltage auxiliary power supply of the vehicle-end interface are 1 / 36 circular. In this way, when the vehicle has a deflection angle, the vehicle-end interface and the pile-end interface can still be plugged in, and the vehicle-end can also be plugged in smoothly when the vehicle deflects at a large angle.

[0028] The charging connection confirmation (CC1), charging connection confirmation (CC2), charging communication CAN H (S+), and charging communication CAN L (S-) of the pile end interface are approximately 1 / 4 ring, and the charging connection confirmation (CC1), charging connection confirmation (CC2), charging communication CAN H (S+), and charging communication CAN L (S-) of the vehicle end interface are 1 / 36 ring. In this way, when the vehicle has a deflection angle, the vehicle end interface and the pile end interface can still be plugged in, and the vehicle end can be plugged in smoothly within the deflection angle range of 75 degrees.

[0029] The height of the protective grounding electrode (PE) at the pile end interface is 3 mm higher than other electrodes. During the docking process, the PE electrode at the vehicle end interface can be docked first, and the grounding electrode is connected first, so that the protective grounding between the vehicle and the earth is connected first to ensure charging safety.

[0030] A circular liquid cooling pipeline is buried in the insulation layer between the DC+ and DC- of the main electrode of the pile end interface. The coolant quickly conducts the heat of the main electrode of the charging plug to increase the current carrying capacity. The pipeline can also be connected to the pile end cable liquid cooling heat pipe to share a set of cooling main units.

[0031] After the vehicle-end interface and the pile-end interface are fully plugged in, a certain gap is still left between the top of the terminal and the guide slope to prevent dust accumulation after long-term use, which may cause the interfaces at both ends to fail to dock completely and reliably.

[0032] In summary, the high-power charging interface installed at the bottom of the vehicle suitable for automatic charging of electric vehicles proposed in the present invention effectively reduces the size in the height direction, and can be easily installed at the bottom of the vehicle and on the ground. The bottom charging method is not related to the body shape, which is convenient for unifying the installation position and reducing the difficulty of realizing automatic charging; at the same time, the charging interface adopts an annular electrode, which can tolerate the vehicle deflection angle and reduce the requirements for vehicle docking; its guide slope reduces the alignment accuracy requirements of the automatic charging mechanical device equipped with the pile end interface; its built-in liquid cooling pipeline can quickly bring out the heat of the main electrode, thereby increasing the current carrying capacity of the main electrode; after the vehicle-end interface and the pile-end interface are fully plugged in, a certain gap is still left between the top of the terminal and the guide slope to prevent dust accumulation, resulting in the inability to fully and reliably dock the interfaces at both ends.

Claims

1. A bottom-mounted high-power charging interface suitable for automatic charging of electric vehicles, characterized in that The plug-in parts of the vehicle-end interface and the pile-end interface both adopt a disc-shaped structure, and all electrodes adopt a concentric ring structure and are arranged on the disc.

2. The charging interface according to claim 1, characterized in that: The outermost insulating plastic part of the pile end interface is designed as an inward annular guiding slope.

3. The charging interface according to claim 1, characterized in that: The main electrode DC power positive (DC+) and DC power negative (DC-) adopt a concentric ring structure and are arranged at the outermost periphery.

4. The charging interface according to claim 1, characterized in that: The positive (A+) and negative (A-) low-voltage auxiliary power supply of the pile-end interface electrode are approximately semi-circular, and the positive (A+) and negative (A-) low-voltage auxiliary power supply of the vehicle-end interface electrode are 1 / 36 circular.

5. The charging interface according to claim 1, characterized in that: The charging connection confirmation (CC1), charging connection confirmation (CC2), charging communication CAN H (S+), and charging communication CAN L (S-) of the pile-end interface electrode are approximately 1 / 4 ring-shaped, and the charging connection confirmation (CC1), charging connection confirmation (CC2), charging communication CAN H (S+), and charging communication CAN L (S-) of the vehicle-end interface electrode are 1 / 36 ring-shaped.

6. The charging interface according to claim 1, characterized in that: The height of the protective earthing electrode (PE) at the pile end interface is higher than other electrodes.

7. The charging interface according to claim 1, characterized in that: An annular liquid cooling pipeline is buried in the insulation layer between the positive (DC+) and negative (DC-) DC power supply of the main electrode at the pile end interface.

8. The charging interface according to claim 1, characterized in that: After the vehicle-end interface and the pile-end interface are fully plugged in, a certain gap still remains between the top of the terminal and the guide slope.

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