Transmitter for wireless charging of electric vehicle

Abstract

The utility model discloses a transmitter for wireless charging of an electric vehicle, which comprises a shell, a transmitting coil and a power supply module, the transmitting coil and the power supply module are arranged in the shell, and the transmitting coil is electrically connected with the power supply module; the shell comprises a bottom shell and a surface cover covering the bottom shell; the whole bottom shell is of an inverted-L-shaped structure, and the bottom shell comprises a coil containing cavity and a power source containing cavity which is located on one side of the coil containing cavity and extends downwards. The coil accommodating cavity accommodates the transmitting coil, and the power supply accommodating cavity accommodates the power supply module. According to the utility model, the emitter and the power supply module are integrated in one shell, additional wiring is not needed between the emitter and the power supply module in an installation site, only one installation position is needed, and the installation of the whole equipment can be simplified in the construction and installation process.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless charging technical field especially relates to a transmitter for electric vehicle wireless charging. BACKGROUND

[0002] With the development of wireless charging technology, wireless charging is extended from the field of smart phones to electric vehicles, such as two-wheeled or three-wheeled electric vehicles.

[0003] The wireless charging of the electric vehicle needs to set a receiver at the electric vehicle end and a transmitter at the ground end, and both the receiver and the transmitter are provided with a coil for wireless energy transmission. Meanwhile, the prior art generally sets a power supply box at the ground end, and the power supply box is provided with a power supply module. The power supply module processes the external input power through rectification filtering, frequency conversion, driving amplification, etc., and then sends signals to the outside through the coil in the transmitter. The transmission signals can transmit power to the receiver through electromagnetic induction or magnetic resonance coupling, etc. to charge the electric vehicle.

[0004] The existing electric vehicle separates the transmitter and the power supply box during the wireless charging process, which needs to set two separate installation positions for the transmitter and the power supply box during the ground installation process. Meanwhile, the two need to be connected by wires, and the wires between the two need to be laid and hidden, which is troublesome. If they are directly placed on the ground, they are easy to be damaged by vehicles.

[0005] Therefore, the prior art needs to be improved. SUMMARY

[0006] In view of the above shortcomings of the prior art, the purpose of the utility model is to integrate the transmitter and the power supply module in one shell, and there is no need to lay wires between the two in the installation site, and only one installation position is needed, which can simplify the installation of the entire device during the construction and installation process.

[0007] To achieve the above purpose, the utility model discloses a transmitter for electric vehicle wireless charging, which comprises a shell, a transmitting coil and a power supply module arranged in the shell, and the transmitting coil is electrically connected with the power supply module.

[0008] The shell comprises a bottom shell and a cover arranged on the bottom shell.

[0009] The bottom shell is in the shape of an inverted L, and comprises a coil accommodating cavity and a power supply accommodating cavity extending downward from one side of the coil accommodating cavity.

[0010] The coil accommodating cavity accommodates the transmitting coil, and the power supply accommodating cavity accommodates the power supply module.

[0011] In some embodiments, the power module generates a resonant signal for magnetic resonance coupling charging and transmits through the transmitting coil.

[0012] In some embodiments, a connecting part is arranged between the bottom shell and the face cover to connect and fix the bottom shell and the face cover, and a double-layer waterproof structure is further arranged inside the connecting part between the bottom shell and the face cover.

[0013] In some embodiments, the double-layer waterproof structure comprises:

[0014] A single U-shaped protrusion is arranged around the periphery of the coil accommodating cavity and the power supply accommodating cavity at the upper end of the bottom shell;

[0015] A double U-shaped protrusion is arranged around the lower end of the face cover, and the single U-shaped protrusion and the double U-shaped protrusion are embedded;

[0016] Two waterproof rubber rings are respectively filled in the embedded positions of the single U-shaped protrusion and the double U-shaped protrusion to seal the embedded positions.

[0017] In some embodiments, the connecting part comprises:

[0018] A turned edge is arranged downwardly at the outside of the double U-shaped protrusion of the face cover;

[0019] A hollow stud is arranged between the double U-shaped protrusion and the turned edge of the face cover;

[0020] A first step is arranged at the outside of the single U-shaped protrusion of the bottom shell, and the lower end of the turned edge abuts on the first step;

[0021] A through hole is opened in the first step;

[0022] A screw is threaded through the through hole and the hollow stud.

[0023] In some embodiments, a waterproof groove is formed between the inside of the turned edge and the outside of the single U-shaped protrusion.

[0024] In some embodiments, the inside of the single U-shaped protrusion of the bottom shell is provided with a second step, the inner wall of the double U-shaped protrusion of the face cover extends downwardly and rests on the second step, and the abutting position of the inner wall of the double U-shaped protrusion and the second step is provided with a sealing rubber.

[0025] In some embodiments, the bottom of the power module is provided with a fin-type heat sink which is attached to the bottom wall of the bottom shell in the power supply accommodating cavity.

[0026] In some embodiments, a pressure relief cushion is further arranged between the upper surface of the coil and the lower surface of the face cover.

[0027] In some embodiments, the bottom shell and the wall surface of the face cover facing the transmitting coil are each provided with a plurality of hollow support grids.

[0028] It should be understood that, within the scope of the present application, the above-mentioned technical features of the present application and the technical features described in detail below (such as the embodiments) can be combined with each other to form new or preferred technical solutions.

[0029] The beneficial effects of the present application are:

[0030] 1. The transmitting coil and the power module are integrated in one housing, so that only one installation position is needed when installing the transmitting device for wireless charging in the charging field, saving space, and no additional wiring is needed between the two, simplifying the installation process.

[0031] 2. The double-layer waterproof structure greatly improves the waterproof performance of the entire transmitter. BRIEF DESCRIPTION OF DRAWINGS

[0032] 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 below. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in these drawings without creative labor.

[0033] Figure 1 It is a structural schematic diagram of the first embodiment of the wireless charging transmitter for electric vehicles of the present application.

[0034] Figure 2 It is Figure 1 The first exploded schematic diagram of the structure.

[0035] Figure 3 It is Figure 1 The second exploded schematic diagram of the structure.

[0036] Figure 4 It is Figure 1 The cross-sectional schematic diagram of the structure.

[0037] Figure 5 It is Figure 4 The enlarged schematic diagram of position A in the middle.

[0038] Figure 6 It is Figure 5 The schematic diagram after removing the waterproof rubber ring.

[0039] Figure 7 It is a partial cross-sectional schematic diagram of the bottom shell.

[0040] Figure 8 is a partial cross-sectional view of the face cover.

[0041] Explanation of reference signs:

[0042] 100 - transmitter, 10 - housing, 11 - bottom shell, 111 - coil accommodating cavity, 112 - power supply accommodating cavity, 12 - face cover, 121 - anchor ear, 122 - screw fixing hole, 20 - transmitting coil, 30 - power module, 40 - connecting part, 41 - flange, 42 - hollow stud, 43 - first step, 431 - L-shaped step, 44 - through hole, 45 - screw, 46 - second step, 50 - double-layer waterproof structure, 51 - single U-shaped protrusion, 511 - first side wall, 512 - second side wall, 513 - first groove, 52 - double U-shaped protrusion, 521 - inner side wall, 522 - middle wall, 523 - outer side wall, 524 - second groove, 525 - third groove, 53 - waterproof rubber ring, 60 - waterproof groove, 70 - finned radiator, 80 - pressure relief cushion, 90 - wire joint, 101 - support grid, 1011 - rib, 1012 - inner recess. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely 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. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0045] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.

[0046] Please refer to Figures 1 to 4The utility model provides a kind of transmitter 100 for electric vehicle wireless charging, including shell 10, the transmitting coil 20 and power module 30 being arranged in shell 10, the transmitting coil 20 with the power module 30 electric connection.Shell 10 can adopt high-strength, and heat-resistant plastic material etc..Power module 30 includes a variety of prior art circuits in it, such as buck, rectification, oscillation, functional amplification etc.circuit, the power of input transmitter 100 is handled and is wirelessly transmitted to receiving end by transmitting coil 20.Transmitting coil 20 can adopt copper coil.

[0047] The utility model's shell 10 includes bottom shell 11, cover is arranged on the face cover 12 of bottom shell 11, bottom shell 11 is overall inverted L shape structure, bottom shell 11 includes coil accommodating cavity 111, the power supply accommodating cavity 112 of being located coil accommodating cavity 111 side and extending downward.The setting of coil accommodating cavity 111 with the power supply accommodating cavity 112 makes bottom shell 11 overall inverted L shape structure, coil accommodating cavity 111 receives transmitting coil 20, and power supply accommodating cavity 112 receives power module 30.

[0048] That is, the transmitter 100 for electric vehicle wireless charging of the utility model divides bottom shell 11 into two cavities, one is coil accommodating cavity 111 for installing transmitting coil 20, and one is power supply accommodating cavity 112 for installing power module 30.Because numerous electronic components are arranged in power module 30, such as capacitor, field effect tube etc., first, the height of these elements is relatively high, and second, these elements need to consider heat dissipation, so that heat dissipation devices need to be added in power module 30, which will result in the height of entire power module 30 being higher than the height of transmitting coil 20, and the height of the power supply accommodating cavity 112 inside the bottom shell 11 of the application is also much greater than the height of coil accommodating cavity 111, so that the height of power supply accommodating cavity 112 can adapt to the height of power module 30. Figure 3 As shown in the figure, coil accommodating cavity 111 is located in the upper left part of bottom shell 11, and power supply accommodating cavity 112 is located in the right side of shell 11 and extends downward so that the entire bottom shell 11 is inverted L shape, so that when the height of power module 30 is higher, the top of power module 30 will not be higher than the top of bottom shell 11, and then the face cover 12 is covered, the upper surface of the entire transmitter 100 is a neat plane (i.e. the upper surface of face cover 12).In the installation process of the transmitter 100 of the utility model, the bottom shell 11 is embedded in the ground, only the upper surface of face cover 12 is exposed on the ground, which is beautiful and occupies small ground space.The heat generated by power module 30 can be directly introduced into the ground through heat conduction, or in order to quickly dissipate heat, heat dissipation channels can be arranged on the bottom or side of power supply accommodating cavity 112 of bottom shell 11 underground.

[0049] As can be seen from the above, the transmitter 100 for wireless charging of electric vehicles of this utility model integrates the transmitting coil 20 and the power module 30 into a single housing 10. This combines two separate components, previously installed independently, into a single unit within the housing 10. Therefore, when installing the transmitter 100 at a charging site, it only occupies one installation location, and no additional wiring is required between the power module 30 and the transmitting coil 20. Furthermore, due to the L-shaped bottom housing 11, after the transmitting coil 20 and the power module 30 are installed inside the bottom housing 11, the power module 30 will not protrude beyond the top of the bottom housing 11, allowing the cover 12 to completely conceal both components and maintain the flatness and aesthetics of the upper surface of the housing 10.

[0050] Furthermore, the power module 30 generates a resonant signal for magnetic resonance coupling charging and transmits it through the transmitting coil 20. That is, the transmitter 100 for wireless charging of electric vehicles of this invention is adaptable to magnetic resonance coupling technology for wireless charging. Its power module 30 is equipped with a resonant circuit for generating the resonant signal for magnetic resonance coupling charging, and the resonant circuit can be a resonant circuit from the prior art. The power module 30 of this invention performs rectification, filtering, high-frequency inversion, and resonance processing on the external input power supply before transmitting the resonant signal outward through the transmitting coil 20.

[0051] Furthermore, such as Figure 4 As shown, a connecting portion 40 is provided between the bottom shell 11 and the front cover 12 of this utility model to connect and fix the bottom shell 11 and the front cover 12. A double-layer waterproof structure 50 is also provided inside the connecting portion 40 between the bottom shell 11 and the front cover 12. The double-layer waterproof structure 50 improves the waterproof performance of the shell 10, preventing external rainwater from entering the bottom shell 11. Meanwhile, the connecting portion 40 is located on the outside of the double-layer waterproof structure 50, preventing the structure of the connecting portion 40 from affecting the waterproof performance of the shell.

[0052] Specifically, such as Figures 5 to 7 As shown, the double-layer waterproof structure 50 of this utility model includes: a single U-shaped protrusion 51 arranged circumferentially around the coil accommodating cavity 111 and the power supply accommodating cavity 112 at the upper end of the bottom shell 11. Figure 6 As shown, a single U-shaped protrusion 51 protrudes from the bottom shell 11 and includes a first sidewall 511 located on the outer side, a second sidewall 512 located on the inner side, and a first groove 513 located between the first sidewall 511 and the second sidewall 512. The first sidewall 511, the first groove 513, and the second sidewall 512 form a single U-shaped structure.

[0053] A double U-shaped protrusion 52 is circumferentially provided at the lower end of the cover 12, such as... Figure 6As shown, the double U-shaped protrusion 52 protrudes downward from the bottom surface of the cover 12, including an outer wall 523 on the outer side, a middle wall 522 in the middle, and an inner wall 521 on the inner side. A second groove 524 is provided between the inner wall 521 and the middle wall 522, and a third groove 525 is provided between the middle wall 522 and the outer wall 523. The inner wall 521, the second groove 524, the middle wall 522, the third groove 525, and the outer wall 523 form a double U-shaped structure.

[0054] The single U-shaped protrusion 51 is engaged with the double U-shaped protrusion 52. Specifically, the first sidewall 511 of the single U-shaped protrusion 51 extends into the third groove 525 of the double U-shaped protrusion 52, the second sidewall 512 of the single U-shaped protrusion 51 extends into the second groove 524 of the double U-shaped protrusion 52, and the middle wall 522 of the double U-shaped protrusion 52 extends into the first groove 513 of the single U-shaped protrusion 51.

[0055] It also includes two waterproof gaskets 53, such as Figure 5 As shown, waterproof rubber rings 53 are filled into the interlocking positions of the single U-shaped protrusion 51 and the double U-shaped protrusion 52 to seal the interlocking positions. Specifically, a waterproof rubber ring 53 is filled into the second groove 524 and the third groove 525 of the double U-shaped protrusion 52. The lower ends of the two waterproof rubber rings 53 are pressed tightly against the first side wall 511 and the second side wall 512 of the single U-shaped protrusion 51, respectively. In this way, the two waterproof rubber rings 53 form two waterproof barriers to prevent external rainwater from entering the coil housing cavity 111 and the power supply housing cavity 112 of the bottom shell 11, thus ensuring the safety of the internal circuit. At the same time, the first groove 513 of the single U-shaped protrusion also has a buffering waterproof effect. If the sealing effect of the first waterproof rubber ring 53 on the outside is not good, the leaked rainwater will be deposited in the first groove 513 and will not immediately soak into the second waterproof rubber ring 53 on the inside.

[0056] Please continue to refer to this. Figures 6 to 8 The connecting part 40 of this utility model includes:

[0057] A flange 41 extends downward from the outer side of the double U-shaped protrusion 52 of the cover 12. A hollow stud 42 is provided between the double U-shaped protrusion 52 and the flange 41 of the cover 12. A screw hole is axially opened in the hollow stud 42. A first step 43 is provided on the outer side of the single U-shaped protrusion 51 of the bottom shell 11. The lower end of the flange 41 abuts against the first step 43. In this embodiment, an L-shaped step 431 is also provided on the outer side of the first step 43. The L-shaped step 431 is lower than the first step 43. When the lower end of the flange 41 abuts against the L-shaped step 431, the contact position between the cover 12 and the bottom shell 11 is at the lowest point, which is conducive to the drainage of water accumulated around the periphery of the shell 10.

[0058] The connecting portion 40 further comprises a through hole 44 formed on the first step 43, and a screw 45 penetrating the through hole 44 and the hollow stud 42. That is, the screw 45 penetrates the through hole 44 of the first step 43 on the bottom shell 11, and is screwed into the screw hole in the hollow stud 42 of the face cover 12, so as to connect and fix the bottom shell 11 and the face cover 12, and make the flange 41 of the face cover 12 tightly abut on the L-shaped step 431 of the bottom shell 11.

[0059] Preferably, as shown in Figure 6 , a waterproof groove 60 is formed between the inner side of the flange 41 and the outer side of the single U-shaped protrusion 51. That is, the waterproof groove 60 is formed between the flange 41 and the first side wall 511 of the single U-shaped protrusion 51, so that the rainwater seeping from the vicinity of the L-shaped step 431 is deposited in the waterproof groove 60, and does not immediately immerse into the first waterproof rubber ring 53 at the upper end. When the amount of rainwater decreases, the water deposited in the waterproof groove 60 is discharged from the position of the L-shaped step 431.

[0060] Preferably, as shown in Figure 6 and Figure 7 , the inner side of the single U-shaped protrusion 51 of the bottom shell 11 is provided with a second step 46, the inner side wall 521 of the double U-shaped protrusion 52 of the face cover 12 extends downward and abuts on the second step 46, and the abutting position of the inner side wall 521 of the double U-shaped protrusion 52 and the second step 46 is provided with sealing glue. In this way, in addition to the sealing of the two waterproof rubber rings 53 on the outer side, the sealing of the sealing glue is also provided, so as to further improve the waterproof effect.

[0061] As shown in Figure 3 and Figure 4 , the bottom of the power module 30 is provided with a fin type radiator 70, and the fin type radiator 70 is attached to the bottom wall of the bottom shell 11 in the power accommodating cavity 112. The fin type radiator 70 is generally provided with a plurality of spaced aluminum heat dissipation fins, and has good heat dissipation effect, and can quickly conduct the heat generated by the power module 30 to the bottom wall of the bottom shell 11 by heat conduction, and then discharge the heat to the outside.

[0062] As shown in Figure 1 , the face cover 12 is provided with a foundation fixing lug 121, and the foundation fixing lug is provided with a screw fixing hole 122. A plurality of foundation fixing lugs 121 can be arranged on the side wall of the face cover 12 to be fixed to the ground by foundation screws, so as to firmly fix the entire transmitter 100 to the ground.

[0063] Preferably, the bottom shell 11 is further connected with an IP65 waterproof level wire joint 90. The wire joint 90 is used for connecting an external power supply, and in the embodiment, the IP65 waterproof level wire joint 90 is adopted to ensure the waterproof effect of the entire product.

[0064] Preferably, as Figure 2 and Figure 3 The upper surface of the coil 20 and the lower surface of the face cover 12 are further provided with a pressure protection pad 80. When a person accidentally steps on the shell 10, or some objects are placed on the shell 10, the pressure protection pad 80 can protect the transmitting coil 20 in the shell 10.

[0065] Further, as Figure 7 and Figure 8 The wall surface of the bottom shell 11 and the face cover 12 towards the transmitting coil 20 is provided with a plurality of hollow support grids 101. The support grid 101 includes a protruding rib 1011 and an inner recess 1012, so that when the upper and lower surfaces of the transmitting coil 20 abut against the face cover 12 and the bottom shell 11, the rib 1011 directly abuts against the transmitting coil 20, and the inner recess 1012 does not abut against the transmitting coil 20. In this way, on the one hand, the rib 1011 can strengthen the strength of the bottom shell 11 and the face cover 12, and on the other hand, the inner recess 1012 of the bottom shell 11 and the face cover 12 can form a pressure protection buffer when pressed, thereby protecting the transmitting coil 20 inside the shell 10.

[0066] The transmitter 100 for wireless charging of the electric vehicle of the utility model, through setting coil containing cavity 111, power supply containing cavity 112 in bottom shell 11, and bottom shell 11 whole presents inverted L shape structure, like this can integrate installation power module 30 and transmitting coil 20 in bottom shell 11. Meanwhile the transmitter 100 of the utility model adopts double-layer waterproof structure 50, effectively avoids rainwater to enter inside shell 10, guarantees the safety of circuit in shell 10.

[0067] The above is only an example made for the purpose of clearly illustrating the utility model, and does not limit the patent range of the utility model. It is impossible to enumerate all the embodiments here, and any equivalent structural transformation made by using the contents in the technical scheme of the utility model, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A transmitter for wireless charging of an electric vehicle, characterized in that, The shell, the transmitting coil arranged in the shell and the power module, the transmitting coil is electrically connected with the power module; The shell includes a bottom shell and a face cover arranged on the bottom shell; The bottom shell is in a whole inverted L-shaped structure, and includes a coil accommodating cavity and a power source accommodating cavity extending downward at one side of the coil accommodating cavity; The coil accommodating cavity accommodates the transmitting coil, and the power source accommodating cavity accommodates the power module.

2. The transmitter for wireless charging of an electric vehicle according to claim 1, wherein, The power module generates a resonance signal for magnetic resonance coupling charging and transmits the resonance signal through the transmitting coil. 3.The transmitter for wireless charging of an electric vehicle of claim 1, wherein, A connecting part is arranged between the bottom shell and the face cover to connect and fix the bottom shell and the face cover, and a double-layer waterproof structure is further arranged inside the connecting part between the bottom shell and the face cover.

4. The transmitter for wireless charging of an electric vehicle of claim 3, wherein, The double-layer waterproof structure includes: A single U-shaped protrusion is arranged around the periphery of the coil accommodating cavity and the power source accommodating cavity at the upper end of the bottom shell; A double U-shaped protrusion is arranged around the lower end of the face cover, and the single U-shaped protrusion and the double U-shaped protrusion are embedded; Two waterproof rubber rings are respectively filled in the embedded positions of the single U-shaped protrusion and the double U-shaped protrusion to seal the embedded positions.

5. The transmitter for wireless charging of an electric vehicle of claim 4, wherein, The connecting part includes: A turned edge is arranged downward at the outside of the double U-shaped protrusion of the face cover; A hollow stud is arranged between the double U-shaped protrusion of the face cover and the turned edge; A first step is arranged at the outside of the single U-shaped protrusion of the bottom shell, and the lower end of the turned edge abuts on the first step; A through hole is formed on the first step; A screw is arranged in the through hole and the hollow stud.

6. The transmitter for wireless charging of an electric vehicle of claim 5, wherein, A waterproof groove is formed between the inside of the turned edge and the outside of the single U-shaped protrusion.

7. The transmitter for wireless charging of an electric vehicle of claim 5, wherein, The inside of the single U-shaped protrusion of the bottom shell is provided with a second step, the inner wall of the double U-shaped protrusion of the face cover extends downward and abuts on the second step, and sealing glue is arranged at the abutting position of the inner wall of the double U-shaped protrusion and the second step.

8. The transmitter for wireless charging of an electric vehicle of claim 1, wherein, The bottom of the power module is provided with a fin-type radiator which is attached to the bottom wall of the bottom shell in the power source accommodating cavity.

9. The transmitter for wireless charging of an electric vehicle of claim 1, wherein, A pressure relief cushion is further arranged between the upper surface of the coil and the lower surface of the face cover.

10. The transmitter for wireless charging of an electric vehicle of claim 1, wherein, The wall surfaces of the bottom shell and the face cover towards the transmitting coil are provided with a plurality of hollow support grids.

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