Automobile wireless charging system

Abstract

A wireless charging system for automobiles includes a ground-based power transmitting platform and an on-board power receiving platform. The ground-based power transmitting platform is mounted on the ground and is elastically deformable in the vertical direction. The on-board power receiving platform is mounted on the chassis of the automobile. When the automobile is charging, the on-board power receiving platform presses against the ground-based power transmitting platform, which is in a compressed state. By setting up the ground-based power transmitting platform on the ground and the on-board power receiving platform on the chassis of the automobile, the two platforms are in close contact during charging. The ground-based power transmitting platform is in a compressed state, maintaining a pressing relationship, thus eliminating the need for foreign object detection and liveness detection. The system is simple, small and compact, and improves charging efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile charging, in particular to an automobile wireless charging system. BACKGROUND

[0002] The current automobile wireless charging system generally includes a transmitting module arranged on the ground and a receiving module arranged on the automobile. When the automobile drives into the charging area, the transmitting module transmits electromagnetic waves to the receiving module, and the receiving module receives the electromagnetic waves and converts them into electric energy.

[0003] The transmitting module and the receiving module of the current automobile wireless charging system have a large charging distance. In order to meet the requirements of regulations and standards, foreign object detection and living body detection functions need to be added, the system is large in size, high in cost, and the charging efficiency is low due to the large charging distance. SUMMARY

[0004] The purpose of the present application is to provide an automobile wireless charging system that can solve the above problems.

[0005] In order to achieve the purpose of the present application, the present application provides the following technical solution:

[0006] The present application provides an automobile wireless charging system, which includes a ground electric energy transmitting platform and a vehicle-mounted electric energy receiving platform. The ground electric energy transmitting platform is arranged on the ground and can be elastically deformed in the vertical direction. The vehicle-mounted electric energy receiving platform is arranged on the chassis of the automobile. When the automobile is charging, the vehicle-mounted electric energy receiving platform abuts against the ground electric energy transmitting platform, and the ground electric energy transmitting platform is in a compressed state.

[0007] In one embodiment, the ground electric energy transmitting platform includes a contact piece and a deformation piece. The contact piece is arranged on the side of the deformation piece away from the ground. The contact piece includes a first contact surface and a first charging surface connected smoothly. The first contact surface is arranged on the side of the first charging surface in the horizontal direction, and the first contact surface extends from the first charging surface towards the ground. When the automobile needs to be charged, the automobile moves and first abuts against the first contact surface. The deformation piece is compressed, so that the contact piece moves towards the ground until the vehicle-mounted electric energy receiving platform contacts the first charging surface, and then the automobile stops moving to charge.

[0008] In one embodiment, the contact member further comprises a second contact surface, the second contact surface is arranged on the side of the first charging surface opposite to the first contact surface, the second contact surface is smoothly connected with the first charging surface, and the second contact surface extends from the first charging surface towards the ground; when the vehicle moves to exceed the first charging surface, the vehicle reverses and first contacts the second contact surface, the deformation member is compressed, so that the contact member moves towards the ground until the vehicle stops moving to charge after the vehicle-mounted electric energy receiving platform contacts the first charging surface.

[0009] In one embodiment, the vehicle-mounted electric energy receiving platform comprises opposite mounting surface and second charging surface, the mounting surface is used to connect with the vehicle, and the second charging surface contacts the first charging surface to charge.

[0010] In one embodiment, the ground electric energy transmitting platform comprises a first magnetic core and a first coil, the first coil is arranged on the first magnetic core, the first magnetic core comprises the first charging surface; the vehicle-mounted electric energy receiving platform comprises a second magnetic core and a second coil, the second coil is arranged on the second magnetic core, the second magnetic core comprises the second charging surface; when the first magnetic core and the second magnetic core are opposite and contact, the first magnetic core and the second magnetic core are symmetrical relative to the first charging surface.

[0011] In one embodiment, the first magnetic core is in a straight line type, the first coil is arranged in the middle of the first magnetic core, and the first charging surface is the surface of the first magnetic core on the two sides of the first coil and facing the second magnetic core.

[0012] Alternatively,

[0013] The first magnetic core is in a "U" type, the number of the first coil is two, the two first coils are arranged at the two ends of the first magnetic core respectively, and the first charging surface is the two end surfaces of the first magnetic core.

[0014] In one embodiment, the ground electric energy transmitting platform comprises a shell and a compression member, the side surface of the first magnetic core is provided with a stepped surface, one end of the compression member is connected with the shell, and the other end of the compression member compresses the stepped surface.

[0015] In one embodiment, the shell comprises a bottom plate and a plurality of side plates protruding from the bottom plate, a plurality of the side plates and the bottom plate enclose a containing cavity, part of the first magnetic core is accommodated in the containing cavity, and the first magnetic core is connected with the bottom plate, the compression member is connected with the side plate, the first charging surface of the first magnetic core is a surface facing away from the bottom plate, and the first charging surface protrudes from the side plate.

[0016] In one embodiment, the compression member is made of elastic material, and the first magnetic core is in contact with the bottom plate.

[0017] Alternatively,

[0018] The compression member is made of rigid material, and the first magnetic core is connected to the bottom plate through a buffer.

[0019] In one embodiment, the wireless charging system for the vehicle further comprises a ground power electronic control unit and a vehicle-mounted power electronic control unit, the ground power electronic control unit is electrically connected to the ground power transmission platform, and the vehicle-mounted power electronic control unit is arranged on the vehicle and is electrically connected to the vehicle-mounted power reception platform.

[0020] By arranging the ground power transmission platform and the vehicle-mounted power reception platform, the ground power transmission platform is arranged on the ground, and the vehicle-mounted power reception platform is arranged on the chassis of the vehicle. When the vehicle is charging, the vehicle-mounted power reception platform and the ground power transmission platform are in close contact, the ground power transmission platform is in a compressed state, and can maintain the state of resistance, so that there is no gap between the two, and foreign object detection and living body detection are not required. The system is simple, small and compact, and can improve the charging efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a schematic diagram of the wireless charging system for the vehicle;

[0023] Figure 2 It is a schematic diagram of the vehicle about to be wirelessly charged;

[0024] Figure 3a - Figure 3c It is a schematic diagram of the vehicle entering the parking space for wireless charging;

[0025] Figure 4a - Figure 4d It is a schematic diagram of the process of the vehicle entering the charging state from the driving state;

[0026] Figure 4e - Figure 4h It is a schematic diagram of the process of the vehicle driving over the position and needing to adjust the charging position;

[0027] Figure 5a- Figure 5b A schematic view of a ground power transmitting platform;

[0028] Figure 6a - Figure 6b A schematic view of a vehicle-mounted power receiving platform;

[0029] Figure 7a - Figure 7b A schematic view of the internal structure of a vehicle wireless charging system;

[0030] Figure 8a - Figure 8d A schematic view of the mounting method of the first magnetic core.

[0031] Explanation of reference signs:

[0032] 100 - parking space, 101 - support, 102 - driving direction arrow sign, 105 - ground, 106 - wheel positioning block, 108 - road;

[0033] 200 - vehicle;

[0034] 11 - ground power transmitting platform, 111 - deformation piece, 112 - contact piece, 113 / 113' - first charging surface, 114 - first contact surface, 115 - second contact surface, 116 - extension plate, 118 / 118' - first magnetic core, 119 / 119' - first coil, 12 - ground power electronic control unit, 13 - vehicle-mounted power receiving platform, 131 - mounting surface, 132 / 132' - second charging surface, 133 - main body portion, 134 - fitting portion, 135 - pilot piece, 136 - connecting plate, 137 - interface, 138 / 138' - second magnetic core, 139 / 139' - second coil, 14 - vehicle-mounted power electronic control unit, 16 - housing, 161 - bottom plate, 162 - side plate, 163 - locking piece, 17 / 18 - pressing piece, 19 - buffer piece, 1111 - side surface, 1112 - notch, 1113 - step surface. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0036] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be a middle component.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, figures, and other references mentioned herein are incorporated by reference in their entirety for the teachings relevant to the sentence and / or paragraph in which the reference is presented.

[0038] Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following examples and features in the examples can be combined with each other in the case of no conflict.

[0039] Please refer to Figure 1 and Figure 2 , the application provides a car wireless charging system, including ground power transmission platform 11 and vehicle-mounted power receiving platform 13. Ground power transmission platform 11 is used to set on the ground 105, and the ground power transmission platform 11 can be elastically deformed in the vertical direction. The vehicle-mounted power receiving platform 13 is used to set on the chassis of the car 200. When the car 200 charges, the vehicle-mounted power receiving platform 13 abuts against the ground power transmission platform 11, and the ground power transmission platform 11 is in a compressed state.

[0040] Specifically, the ground power transmission platform 11 is set on the parking space 100 where the car 200 parks, and protrudes relative to the surface of the parking space 100, which can be set at various positions of the parking space 100 according to needs.

[0041] As shown in Figure 2 and Figure 3a , the ground power transmission platform 11 is set at a position close to the front of the parking space 100, and correspondingly, the vehicle-mounted power receiving platform 13 is set at a position close to the front of the car 200. The car 200 is parked in the parking space 100 in a forward manner, that is, the front of the car 200 enters the parking space 100 first, and then the rear of the car 200 enters the parking space 100. When the car 200 is parked stably in the parking space 100, the ground power transmission platform 11 is just aligned with the vehicle-mounted power receiving platform 13.

[0042] As shown in Figure 3b , it is basically the same as shown in Figure 3a , the difference is that the vehicle-mounted power receiving platform 13 is set at a position close to the rear of the car 200. The car 200 is parked in the parking space 100 in a reverse manner, that is, the rear of the car 200 enters the parking space 100 first, and then the body of the car 200 enters the parking space 100. Similarly, when the car 200 is parked stably in the parking space 100, the ground power transmission platform 11 is just aligned with the vehicle-mounted power receiving platform 13.

[0043] As shown in Figure 3c , it is basically the same as shown in Figure 3a andFigure 3b The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 3a The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 3b The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 3c The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and

[0044] The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 2 The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figures 3a to 3c The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and

[0045] The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figures 3a to 3c The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and

[0046] The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 4a The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 4d The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 4a The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 4b The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 4c The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 4d The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and

[0047] The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 4e The basic layout is the same, with the difference being that the parking space 100 is inclined relative to the road 108, and Figure 4hThis illustrates the process of adjusting the charging position when the car 200 passes through a parking space. For example... Figure 4e As shown, after the car 200 passes the designated spot, it needs to reverse direction. The onboard power receiving platform 13 follows the car 200 and gradually approaches the ground power transmitting platform 11; as Figure 4f As shown, the vehicle-mounted power receiving platform 13 begins to contact the ground power transmitting platform 11. Under the pressure of the vehicle 200, the ground power transmitting platform 11 begins to be compressed in the vertical direction; as... Figure 4g As shown, the ground-based power transmission platform 11, after being compressed to a certain extent by the vehicle-mounted power receiving platform 13, no longer contracts and remains in this compressed state; as Figure 4h As shown, after the vehicle-mounted power receiving platform 13 and the ground power transmitting platform 11 are aligned, the vehicle 200 stops moving, the vehicle-mounted power receiving platform 13 and the ground power transmitting platform 11 are in close contact, and the ground power transmitting platform 11 remains in a compressed state, so that the vehicle-mounted power receiving platform 13 and the ground power transmitting platform 11 remain in contact.

[0048] This application sets up a ground power transmission platform 11 and a vehicle-mounted power receiving platform 13. The ground power transmission platform 11 is set on the ground 105, and the vehicle-mounted power receiving platform 13 is set on the chassis of the car 200. When the car 200 is charging, the vehicle-mounted power receiving platform 13 and the ground power transmission platform 11 are in close contact. The ground power transmission platform 11 is in a compressed state and can maintain a resisting state, so that there is no gap between the two. There is no need for foreign object detection and liveness detection. The system is simple, small and compact, and can improve charging efficiency.

[0049] In traditional schemes where the transmitter and receiver are spaced apart, the charging efficiency can only reach 90%-92% at most. However, in this application, the ground power transmission platform 11 and the vehicle-mounted power receiving platform 13 are in close contact, which can enable the charging efficiency to reach 95%-96% at most, significantly improving the charging efficiency compared to traditional schemes.

[0050] Continue to refer to Figure 1 and Figure 2The wireless charging system for automobiles also includes a ground-based power electronic control unit 12 and an on-board power electronic control unit 14. The ground-based power electronic control unit 12 can be mounted on the ground 105 or on a bracket 101 of the ground 105. The ground-based power electronic control unit 12 is electrically connected to the ground power transmitting platform 11 via wires. The on-board power electronic control unit 14 is mounted on the vehicle 200 and is also electrically connected to the on-board power receiving platform 13 via wires. The ground-based power electronic control unit 12 controls the ground power transmitting platform 11 to emit electromagnetic waves to form a magnetic field, while the on-board power electronic control unit 14 controls the on-board power receiving platform 13 to receive electromagnetic waves. This magnetizes the on-board power receiving platform 13 within the magnetic field of the ground power transmitting platform 11, thereby generating an induced current that flows to the battery for charging.

[0051] This application does not impose excessive limitations on the specific structure and principle of the ground power electronic control unit 12 and the vehicle-mounted power electronic control unit 14, nor does it impose specific limitations on the internal circuits and other components of the two control units. Any existing technical solution can be referenced for configuration.

[0052] Please refer to Figures 4a to 4d The ground-based power transmission platform 11 includes a contact 112 and a deformable member 111. The contact 112 is disposed on the side of the deformable member 111 away from the ground 105. The contact 112 includes a first contact surface 114 and a first charging surface 113 that are smoothly connected. The first contact surface 114 is disposed on one side of the first charging surface 113 in the horizontal direction and extends from the first charging surface 113 toward the ground 105.

[0053] Please refer to Figure 4a and Figure 4b When the car 200 needs to be charged, the car 200 moves from outside the parking space 100 to inside the parking space 100, causing the on-board power receiving platform 13 to abut against the first contact surface 114. Please refer to... Figure 4b and Figure 4c As the vehicle 200 moves, under the pressure of the vehicle 200, the on-board power receiving platform 13 gradually applies pressure to the contact member 112 of the ground power transmitting platform 11. This causes the contact member 112 of the ground power transmitting platform 11 to transmit the pressure to the deformable member 111, which is compressed, causing the contact member 112 to move towards the ground 105. Please refer to [reference needed]. Figure 4c and Figure 4d The vehicle 200 stops moving to begin charging once the onboard power receiving platform 13 comes into contact with the first charging surface 113.

[0054] For specific details, please refer to... Figures 4a to 4d ,as well as Figure 5a andFigure 5b The first charging surface 113 is approximately parallel to the ground 105, or it can be understood as being approximately horizontal. The first charging surface 113 is approximately located in the middle of the contact member 112, and the first contact surface 114 is approximately located at the edge of the contact member 112. When the car 200 enters the parking space 100 from outside the parking space 100, the first contact surface 114 is located on the side of the first charging surface 113 facing the car 200. One end of the first contact surface 114 is connected to the first charging surface 113, and the other end extends towards the ground 105. The first charging surface 113 is approximately flat, and the main body of the first contact surface 114 can be flat or curved. The edge connecting to the first charging surface 113 can be rounded to create a smooth transition, allowing the vehicle-mounted power receiving platform 13 to slide smoothly on the first contact surface 114 and onto the first charging surface 113.

[0055] Optional, please refer to Figures 4a to 4d and Figure 5a and Figure 5b An extension plate 116 can be provided on the first contact surface 114. The extension plate 116 is approximately flush with the first contact surface 114. One end of the extension plate 116 is connected to the first contact surface 114, and the other end is suspended and extends towards the ground 105. The extension plate 116 extends the area of ​​the first contact surface 114, allowing a car 200 with a lower chassis to first contact the extension plate 116 and gradually slide to the first contact surface 114 and the first charging surface 113 when moving. This configuration can accommodate charging of various types of cars 200, and also allows the area of ​​the first contact surface 114 to be smaller. By extending the area of ​​the first contact surface 114 through the extension plate 116, the volume of the ground power transmission platform 11 can be reduced.

[0056] Please refer to Figures 4e to 4h as well as Figure 5a and Figure 5b The contact 112 also includes a second contact surface 115, which is disposed on the side of the first charging surface 113 opposite to the first contact surface 114. The second contact surface 115 is smoothly connected to the first charging surface 113 and extends from the first charging surface 113 toward the ground 105. Please refer to [reference needed]. Figure 4e and Figure 4f When car 200 enters parking space 100 from outside and moves too far, causing the on-board power receiving platform 13 to exceed the first charging surface 113, car 200 stops and moves in the opposite direction. The on-board power receiving platform 13 first comes into contact with the second contact surface 115. Please refer to [reference needed]. Figure 4f and Figure 4gAs the vehicle 200 moves, under the pressure of the vehicle 200, the on-board power receiving platform 13 gradually applies pressure to the contact member 112 of the ground power transmitting platform 11. This causes the contact member 112 of the ground power transmitting platform 11 to transmit the pressure to the deformable member 111, which is compressed, causing the contact member 112 to move towards the ground 105. Please refer to [reference needed]. Figure 4g and Figure 4h The vehicle 200 stops moving to begin charging once the onboard power receiving platform 13 comes into contact with the first charging surface 113.

[0057] For specific details, please refer to... Figures 4a to 4d ,as well as Figure 5a and Figure 5b The second contact surface 115 is located approximately at the edge of the contact member 112. One end of the second contact surface 115 is connected to the first charging surface 113, and the other end extends toward the ground 105. The main body of the second contact surface 115 can be flat or curved, and the edge that contacts the first charging surface 113 can be rounded to create a smooth transition with the first charging surface 113. This allows the vehicle-mounted power receiving platform 13 to slide smoothly on the second contact surface 115 and smoothly slide onto the first charging surface 113.

[0058] Please refer to Figures 4a to 4h ,as well as Figure 6a and Figure 6b The vehicle-mounted power receiving platform 13 includes a mounting surface 131 and a second charging surface 132 facing away from each other. The mounting surface 131 is used to connect with the vehicle 200, and the second charging surface 132 contacts the first charging surface 113 for charging.

[0059] Specifically, corresponding to the first charging surface 113, the second charging surface 132 can also be roughly flat and roughly parallel to the ground 105, which can be understood as the second charging surface 132 being a horizontal plane. The mounting surface 131 can be roughly parallel to the second charging surface 132, or it can be not parallel, but rather adapted to the structure of the chassis of the car 200.

[0060] Optional, please refer to Figure 6a and Figure 6b The vehicle-mounted power receiving platform 13 may further include a connecting plate 136 and a pilot component 135. The second charging surface 132 is located in the main body 133 of the vehicle-mounted power receiving platform 13. The pilot component 135 is connected and fixed to the main body 133 of the vehicle-mounted power receiving platform 13 through multiple connecting plates 136. The pilot component 135 is approximately flush with the second charging surface 132. Please refer to... Figures 4a to 4dWhen the car 200 enters the parking space 100 from outside the parking space 100 for charging, the pilot member 135 first contacts the first contact surface 114 and the first charging surface 113 to remove foreign objects from the first contact surface 114 and the first charging surface 113. As the car 200 moves, when the first charging surface 113 and the second charging surface 132 contact each other and charging begins, the pilot member 135 is located on one side of the first charging surface 113.

[0061] The vehicle-mounted power receiving platform 13 may also be equipped with a mating part 134 for mounting and fixing with the vehicle 200, and an interface 137 for electrical connection with the vehicle-mounted electronic power control unit, etc. The specific structure of the vehicle-mounted power receiving platform 13 is not limited in detail.

[0062] Please refer to Figure 7a and Figure 7b The ground-based power transmission platform 11 includes a first magnetic core 118 and a first coil 119, with the first coil 119 wound around the first magnetic core 118. The first magnetic core 118 includes a first charging surface 113. The vehicle-mounted power receiving platform 13 includes a second magnetic core 138 and a second coil 139, with the second coil 139 wound around the second magnetic core 138. The second magnetic core 138 includes a second charging surface 132. When the first magnetic core 118 and the second magnetic core 138 are facing each other and in contact, the first magnetic core 118 and the second magnetic core 138 are symmetrical with respect to the first charging surface 113.

[0063] The charging process is as follows: the first coil 119 of the ground power transmission platform 11 is energized, which excites the first magnetic core 118 to generate a magnetic field. The second magnetic core 138 is magnetized in the magnetic field of the first magnetic core 118. The magnetic field of the second magnetic core 138 then excites the second coil 139 to generate a current. Through the principle of electromagnetic induction, the current provided by the ground power transmission platform 11 is transferred to the vehicle power receiving platform 13. The current of the second coil 139 then charges the battery of the car 200, thus completing the charging process. Figure 7a The arrows in the diagram show the path of the magnetic circuit. It can be seen that the magnetic circuit is excited from the first magnetic core 118 and transmitted to the second magnetic core 138, and then returns to the first magnetic core 118 to complete the closed loop.

[0064] The first magnetic core 118 and the second magnetic core 138 are symmetrical with respect to the first charging surface 113, which makes the overall structure simple. The first charging surface 113 and the second charging surface 132 have the same area, which makes the structure of the ground power transmission platform 11 and the vehicle power receiving platform 13 more compact, thus reducing the size of the system.

[0065] Optional, please refer to Figure 7a The first magnetic core 118 is linear, the first coil 119 is located in the middle of the first magnetic core 118, and the first charging surface 113 is the surface of the first magnetic core 118 on both sides of the first coil 119 facing the second magnetic core 138.

[0066] Specifically, the first magnetic core 118 may include a central region and two side regions extending in a straight line. A first coil 119 is wound around the central region, and the side regions are a first region (118) and a second region (118'). The first region has a charging surface (113), and the second region has another charging surface (113'). The two charging surfaces of the first and second regions constitute the first charging surface 113, and the two charging surfaces are flush and coplanar. The structure of the second magnetic core 138 is symmetrical to that of the first magnetic core 118, such that the second magnetic core 138 also includes a central region and a third region (138) and a fourth region (138') located in the central region. The third region has a charging surface (131), and the fourth region has another charging surface (131'). The two charging surfaces of the third and fourth regions constitute the second charging surface 132. The straight-line structure of the first magnetic core 118 is simple, and the resulting ground power transmission platform 11 can be made smaller in the vertical direction. The first charging surface 113 consists of two surfaces, with the magnetic circuit extending in a straight line on the first magnetic core 118. The second charging surface 132 also consists of two surfaces, with the magnetic circuit extending in a straight line on the second magnetic core 138. At the two opposite charging surfaces (113 / 132), the magnetic circuit points from the first magnetic core 118 to the second magnetic core 138. At the two charging surfaces on the other side (113' / 132'), the magnetic circuit points from the second magnetic core 138' to the first magnetic core 118'. This can form a closed-loop magnetic circuit, which can better complete wireless charging based on the electromagnetic induction effect.

[0067] Optional, please refer to Figure 7b ,and Figure 7a They are basically the same, except that the first magnetic core 118 is U-shaped, there are two first coils 119, the two first coils 119 are respectively set at both ends of the first magnetic core 118, and the first charging surface 113 is the two end faces of the first magnetic core 118.

[0068] Specifically, the two first coils 119 can be coil one (119) and coil two (119'), respectively. Coil one and coil two can be independent coils or they can be connected by wires to form a whole coil. Correspondingly, the second coil 139 can also include coil three (139) and coil four (139'). This embodiment also has a first charging surface 113 composed of two surfaces (113 / 113'). The magnetic circuit on the first magnetic core 118 and the second magnetic core 138 extends along a "U"-shaped path, which can form a closed-loop magnetic circuit and can also complete wireless charging based on the electromagnetic induction effect.

[0069] Please refer to Figures 8a to 8dThe ground power transmission platform 11 includes a housing 16 and a clamping member (17 / 18). The side 1111 of the first magnetic core 118 is provided with a stepped surface 1113. One end of the clamping member (17 / 18) is connected to the housing 16, and the other end of the clamping member (17 / 18) presses against the stepped surface 1113.

[0070] Combination Figure 5a and Figures 8a to 8d The housing 16 can be a part of the structure of the contact 112, a part of the structure of the deformable part 111, or a structure inside the ground power transmission platform 11.

[0071] Please refer to Figure 8a The first magnetic core 118 includes a first charging surface 113 facing the second magnetic core 138, and side surfaces 1111 surrounding the first charging surface 113. The stepped surface 1113 on the side surface 1111 can be achieved by creating a notch 1112; for details, please refer to [reference needed]. Figure 8c and Figure 8b Notches 1112 can be formed on both opposite sides 1111. These notches 1112 are formed on the sides 1111 and are not connected to the first charging surface 113, thus forming a stepped surface 1113; please refer to Figure 8d and Figures 8a to 8d A notch 1112 can be made on both opposite sides 1111. The notch 1112 is formed on the side 1111 and is connected to the first charging surface 113. A stepped surface 1113 can also be formed.

[0072] The clamping component is connected to the housing 16 and pressed onto the stepped surface 1113. On the one hand, it facilitates the installation of the first magnetic core 118, and on the other hand, it prevents the first magnetic core 118 from being fixed in place, but allows it to have some room to move, so that it can have a certain buffering effect when the ground power transmission platform 11 and the vehicle power receiving platform 13 come into contact and collide.

[0073] Continue to refer to Figure 8a The housing 16 includes a base plate 161 and a plurality of side plates 162 protruding from the base plate 161, the plurality of side plates 162 and the base plate 161 enclosing a receiving cavity. A portion of the first magnetic core 118 is housed in the receiving cavity, and the first magnetic core 118 is connected to the base plate 161. The clamping member is connected to the side plates 162. The first charging surface 113 of the first magnetic core 118 is the surface facing away from the base plate 161, and the first charging surface 113 protrudes from the side plates 162.

[0074] Both the base plate 161 and the side plate 162 can be flat. The end of the side plate 162 away from the base plate 161 can be provided with a structure such as a screw hole. The clamping member can be fixed to the side plate 162 by a locking member 163 such as a nut.

[0075] The first charging surface 113 protrudes from the side plate 162, which ensures that the side plate 162 will not interfere with the vehicle power receiving platform 13 during charging, and ensures that the first charging surface 113 and the vehicle power receiving platform 13 maintain close contact.

[0076] In one embodiment, please refer to Figure 8b and Figure 8c The clamping part 17 is made of elastic material, and the first magnetic core 118 is in contact with the base plate 161.

[0077] Specifically, the clamping member 17 can be a metal spring sheet. When the first magnetic core 118 contacts the vehicle power receiving platform 13, the clamping member 17 can generate elastic deformation as needed so that the first magnetic core 118 can adapt to the contact and collision of the vehicle power receiving platform 13, and can ensure that the first charging surface 113 and the vehicle power receiving platform 13 maintain close contact.

[0078] In another embodiment, please refer to Figure 8d and Figure 8a The clamping member 18 is made of rigid material, and the first magnetic core 118 is connected to the base plate 161 through the buffer member 19.

[0079] Specifically, the clamping component 18 is made of a non-metallic pressure plate, such as bakelite, fiberglass board, or acrylic board. The buffer component 19 is made of foam, silicone, or rubber. The buffer component 19 is elastically deformable. When the first magnetic core 118 contacts the vehicle-mounted power receiving platform 13, the buffer component 19 can elastically deform as needed to allow the first magnetic core 118 to adapt to the contact and collision with the vehicle-mounted power receiving platform 13, and to ensure that the first charging surface 113 maintains close contact with the vehicle-mounted power receiving platform 13.

[0080] Figure 8d - ​ The installation method of the first magnetic core 118 shown can also be applied to the installation of the second magnetic core 138, and will not be described again here.

[0081] The present application provides a detailed description of a wireless charging system for automobiles. Specific examples have been used to illustrate the principles and embodiments of the present application. The description of the embodiments above is only for the purpose of helping to understand the method and core ideas of the present application. At the same time, for those skilled in the art, there will be changes in specific embodiments and application scope based on the ideas of the present application. Therefore, the content of this specification should not be construed as a limitation of the present application.

Claims

1. A wireless charging system for automobiles, characterized in that, It includes a ground-based power transmission platform and a vehicle-mounted power receiving platform. The ground-based power transmission platform is designed to be installed on the ground and is elastically deformable in the vertical direction. The vehicle-mounted power receiving platform is designed to be installed on the chassis of a vehicle. When the vehicle is charging, the vehicle-mounted power receiving platform supports the ground-based power transmission platform, and the ground-based power transmission platform is in a compressed state. The ground-based power transmission platform includes a first magnetic core and a first coil, the first coil being wound on the first magnetic core, and the first magnetic core including a first charging surface; the vehicle-mounted power receiving platform includes a second magnetic core and a second coil, the second coil being wound on the second magnetic core, the second magnetic core including a second charging surface, and the second charging surface contacting the first charging surface for charging; The ground-based power transmission platform includes a housing and a clamping member. The side of the first magnetic core is formed into a stepped surface by opening a notch. One end of the clamping member is connected to the housing, and the other end of the clamping member presses against the stepped surface. The housing includes a bottom plate and a plurality of side plates protruding from the bottom plate. The plurality of side plates and the bottom plate enclose a receiving cavity. A portion of the first magnetic core is housed in the receiving cavity, and the first magnetic core is connected to the bottom plate. The clamping member is connected to the side plates. The first charging surface of the first magnetic core is the surface facing away from the bottom plate, and the first charging surface protrudes from the side plates. The clamping component is made of an elastic material, and the first magnetic core is in contact with the base plate; When the first magnetic core contacts the vehicle-mounted power receiving platform, the clamping member can elastically deform as needed to allow the first magnetic core to adapt to the contact and collision with the vehicle-mounted power receiving platform, and to ensure that the first charging surface maintains close contact with the vehicle-mounted power receiving platform.

2. The wireless charging system for automobiles as described in claim 1, characterized in that, The ground-based power transmission platform includes a contact element and a deformable element. The contact element is disposed on the side of the deformable element away from the ground. The contact element includes a first contact surface and a first charging surface that are smoothly connected. The first contact surface is disposed on one side of the first charging surface in the horizontal direction and extends from the first charging surface towards the ground. When the vehicle needs to be charged, the vehicle moves and first comes into contact with the first contact surface. The deformable element is compressed, causing the contact element to move towards the ground until the vehicle-mounted power receiving platform contacts the first charging surface. Then, the vehicle stops moving to begin charging.

3. The wireless charging system for automobiles as described in claim 2, characterized in that, The contact element further includes a second contact surface, which is disposed on the side of the first charging surface opposite to the first contact surface. The second contact surface is smoothly connected to the first charging surface and extends from the first charging surface toward the ground. When the vehicle moves such that the on-board power receiving platform passes the first charging surface, the vehicle moves in the opposite direction and first comes into contact with the second contact surface. The deformable element is compressed, causing the contact element to move toward the ground until the on-board power receiving platform contacts the first charging surface, at which point the vehicle stops moving to begin charging.

4. The wireless charging system for automobiles as described in claim 2, characterized in that, The vehicle-mounted power receiving platform includes a mounting surface facing away from each other and a second charging surface, the mounting surface being used to connect to the vehicle.

5. The wireless charging system for automobiles as described in claim 1, characterized in that, When the first magnetic core and the second magnetic core are facing each other and in contact, the first magnetic core and the second magnetic core are symmetrical with respect to the first charging surface.

6. The wireless charging system for automobiles as described in claim 5, characterized in that, The first magnetic core is linear, the first coil is disposed in the middle of the first magnetic core, and the first charging surface is the surface of the first magnetic core on both sides of the first coil facing the second magnetic core; or, The first magnetic core is U-shaped, and there are two first coils, which are respectively disposed at both ends of the first magnetic core. The first charging surface is the two end faces of the first magnetic core.

7. The wireless charging system for automobiles as described in any one of claims 1 to 6, characterized in that, The wireless charging system for automobiles also includes a ground-based power electronic control unit and an on-board power electronic control unit. The ground-based power electronic control unit is electrically connected to the ground-based power transmitting platform, and the on-board power electronic control unit is installed on the automobile and electrically connected to the on-board power receiving platform.

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