Wireless charging vehicle-mounted pickup mechanism and device

Abstract

The invention provides a vehicle-mounted pickup mechanism and device for wireless charging, and is used for solving the technical problems that an existing vehicle-mounted wireless charging pickup end is loose in structure and poor in heat dissipation effect. The vehicle-mounted picking mechanism comprises a picking box with an opening in the upper end, and a power assembly is installed in the picking box. A winding cooling groove is further formed in the bottom end face of the pickup box, the section of the cooling groove is in a T shape, a cooling sealing plate is installed on the upper portion of the T-shaped groove of the cooling groove, an installation via hole penetrating through an inner cavity and the bottom end face of the pickup box is formed in the bottom end face of the pickup box, a coil binding post is arranged in the installation via hole, and the coil assembly and the power assembly are connected through the coil binding post. According to the vehicle-mounted pickup mechanism, the installation area of the vehicle-mounted pickup mechanism is reduced through the modular design of the power assembly, the structure is compact, meanwhile, the heat dissipation effect of the vehicle-mounted pickup mechanism is improved through the arrangement of the reversely-arranged winding cooling groove, meanwhile, the reversely-arranged cooling groove avoids the influence on a power circuit when cooling liquid leaks, and the stability of the device is improved.

Description

Technical Field

[0001] The invention relates to the field of wireless power transmission, and in particular to a vehicle-mounted pickup mechanism and device for wireless charging. Background Art

[0002] Wireless power transmission (WPT) technology refers to the technology that uses electrical engineering theory, power electronics technology, and control theory to transmit electrical energy from the power grid or battery to electrical equipment in a non-electrical contact manner using magnetic fields, electric fields, microwaves, etc. The two commonly used wireless power transmission methods are magnetic field coupled wireless power transmission (MC-WPT) and electric field coupled wireless power transmission (EC-WPT). The MC-WPT system has the advantages of relatively mature overall technology, stable transmission performance, and a large transmission power range, and is therefore used in wireless charging of electric vehicles.

[0003] The design of the on-board pickup end of the electric vehicle MC-WPT system directly affects the efficiency and safety of wireless charging. At the same time, the pickup end device installed on the chassis of the electric vehicle will also affect the performance of the electric vehicle. When designing the on-board pickup end, the first thing to consider is the size limit of the on-board space and the weight limit of the vehicle load. The chassis space of electric vehicles is often affected by the body structure, battery pack, etc., so in-depth space analysis is required to ensure that the pickup end can be safely and effectively installed in the specified space. In order to meet the volume and weight requirements of vehicle modification, it is necessary to design lightweight modules such as power modules, resonant capacitors and resonant inductors, and adopt a compact layout and efficient heat dissipation solution to ensure the reliability and safety of the system in long-term operation while reducing the volume of the pickup end device. Summary of the invention

[0004] The purpose of the present invention is to provide a vehicle-mounted wireless charging pickup mechanism and device, which is used to solve the technical problems of the existing vehicle-mounted wireless charging pickup terminal having a loose structure and poor heat dissipation effect.

[0005] A wireless charging vehicle-mounted pickup mechanism comprises a pickup box with an upper opening, a coil assembly is installed at the bottom of the pickup box, and a power assembly is installed in the pickup box;

[0006] A winding cooling groove is also provided on the bottom end surface of the pickup box, and the cross-section of the cooling groove is T-shaped. A cooling sealing plate is installed on the upper part of the T-shaped groove of the cooling groove. A mounting through hole is provided on the bottom end surface of the pickup box, which passes through its inner cavity and the bottom end surface. A coil terminal is arranged in the mounting through hole, and the coil assembly and the power assembly are connected through the coil terminal.

[0007] Optionally, an upper cover plate is installed on the top of the pickup box, and a lower shell is installed on the bottom end surface of the pickup box;

[0008] Sealing rings are arranged between the upper cover plate and the top end surface of the pickup box and between the bottom end surface of the pickup box and the top end surface of the lower shell body.

[0009] Optionally, the coil assembly includes a power receiving coil, a signal transmission coil, a coil partition and a coil core which are arranged in sequence from bottom to top, and the upper end surface of the coil core abuts against the bottom end surface of the pickup box.

[0010] Optionally, a card slot for carding the discharge energy receiving coil and the signal transmission coil is provided on the inner bottom end surface of the lower shell;

[0011] The thickness of the coil components after being stacked is equal to the distance from the bottom end of the card placement slot to the bottom end surface of the pickup box.

[0012] Optionally, the power component includes a plurality of installation cavities installed in the pickup box, and a DC-HFAC power module and a secondary resonant circuit module are installed in the plurality of installation cavities;

[0013] The input end of the secondary resonant circuit module is connected to the power receiving coil through the coil terminal, and the output end of the secondary resonant circuit module is connected to the input end of the DC-HFAC power module;

[0014] A DC bus interface is provided on one side wall of the pickup box, and the output end of the DC-HFAC power module is connected to the inner side of the DC bus interface through a copper bus.

[0015] Optionally, a control board, a power board, a network port conversion module and an OFDM module are also installed in some of the installation cavities;

[0016] The output end of the power board is connected to the power supply end of the control board through a cable, and the communication interface on the control board is connected to the network port conversion module and the OFDM module respectively.

[0017] Optionally, a network interface, a weak current interface, an antenna interface, and a water cooling interface are provided on one side wall of the pickup box;

[0018] There are two groups of water cooling interfaces, the inner sides of the two groups of water cooling interfaces are respectively connected to the two ends of the cooling tank, the inner side of the network interface is connected to the network port conversion module, the inner side of the weak current interface is connected to the power board, and the inner side of the antenna interface is connected to the control board.

[0019] Optionally, a vent valve communicating with the inner and outer walls of the cavity is further provided on one side wall of the pickup box;

[0020] An aluminum substrate is also provided in the cavity of the pickup box, the lower end surface of the aluminum substrate is connected to the inner bottom end surface of the pickup box through thermal conductive silicone grease, and the upper end surface of the aluminum substrate is connected to the heating component of the power component through thermal conductive silicone grease.

[0021] A wireless charging device comprises the above-mentioned vehicle-mounted pickup mechanism for wireless charging.

[0022] Optionally, it also includes a wireless charging transmitting mechanism, which includes a signal transmitting coil and a power transmitting coil, the signal transmitting coil is coupled with the signal receiving coil to transmit the signal, and the power transmitting coil is coupled with the power receiving coil to transmit the power.

[0023] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0024] The present application reduces the installation area of ​​the power component through modular design, and has a compact structure. At the same time, the heat dissipation effect of the vehicle-mounted pickup mechanism is improved by setting a reverse-set winding cooling groove. At the same time, the reverse-set cooling groove avoids the impact of coolant leakage on the power circuit, thereby improving the stability of the device.

[0025] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings of the present invention are as follows.

[0027] Figure 1 It is a structural schematic diagram of the lower end of the vehicle-mounted picking mechanism of the present invention.

[0028] Figure 2 It is a structural schematic diagram of the upper end of the vehicle-mounted picking mechanism of the present invention.

[0029] Figure 3 It is a schematic diagram of the structure of the inner side of the lower shell of the present invention.

[0030] Figure 4 It is a schematic diagram of the pickup box and cooling trough structure of the present invention.

[0031] Figure 5 It is a schematic diagram of the structure of the pickup box and the cooling sealing plate of the present invention.

[0032] Figure 6 It is a schematic diagram of the structure of the coil assembly and the coil terminal of the present invention.

[0033] Figure 7 It is a schematic diagram of the structure of the power component of the present invention.

[0034] In the figure: 1-pick-up box; 2-cooling groove; 3-cooling sealing plate; 4-coil terminal; 5-upper cover; 6-lower shell; 7-power receiving coil; 8-signal transmission coil; 9-coil partition; 10-coil core; 11-card release slot; 12-DC-HFAC power module; 13-secondary resonant circuit module; 14-DC bus interface; 15-control board; 16-power board; 17-network port conversion module; 18-OFDM module; 19-network interface; 20-weak current interface; 21-antenna interface; 22-water cooling interface; 23-ventilation valve; 24-backup power board. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] Embodiment 1:

[0037] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 A wireless charging vehicle-mounted pickup mechanism shown includes a pickup box 1 with an upper opening, a coil assembly is installed at the bottom of the pickup box 1, and a power assembly is installed in the pickup box 1;

[0038] A winding cooling groove 2 is also provided on the bottom end surface of the pickup box 1, and the cross-section of the cooling groove 2 is T-shaped. A cooling sealing plate 3 is installed on the upper part of the T-shaped groove of the cooling groove 2. A mounting through hole is provided on the bottom end surface of the pickup box 1, which passes through its inner cavity and the bottom end surface. A coil terminal 4 is arranged in the mounting through hole, and the coil assembly and the power assembly are connected through the coil terminal 4.

[0039] In this embodiment, the heat dissipation effect of the vehicle-mounted pickup mechanism is improved by setting a reversely arranged meandering cooling groove, and the influence of coolant leakage on the power circuit is avoided by setting the coil terminal 4 and the reverse cooling groove, so that the power module can be better protected during long-term operation, thereby improving the overall stability and safety of the system. The cross section of the cooling groove 2 is set to a T shape in this application, which is convenient for welding the cooling sealing plate 3, and the sealing effect is good after welding.

[0040] like Figure 1 and Figure 2 As shown, an upper cover plate 5 is installed on the top of the pickup box 1, and a lower shell 6 is installed on the bottom end surface of the pickup box 1;

[0041] Sealing rings are provided between the upper cover plate 5 and the top end surface of the pickup box 1 and between the bottom end surface of the pickup box 1 and the top end surface of the lower shell 6 .

[0042] In this embodiment, the lower shell 6 and the upper cover plate 5 are both fastened to the pickup box 1 by screws, and the sealing performance of the pickup mechanism is improved by providing a sealing ring. When the pickup mechanism is installed, the upper cover plate 5 is installed on the bottom of the vehicle.

[0043] like Figure 1 , Figure 2 and Figure 6 As shown, the coil assembly includes a power receiving coil 7, a signal transmission coil 8, a coil partition 9 and a coil core 10 which are arranged in sequence from bottom to top, and the upper end surface of the coil core 10 is in contact with the bottom end surface of the pickup box 1.

[0044] In this embodiment, the power receiving coil 7 and the signal transmission coil 8 are respectively coupled with the power transmitting coil and the signal receiving coil of the ground transmitting mechanism to obtain the power transmission voltage and the signal transmission voltage, and the voltage is transmitted to the power component through the coil terminal 4.

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, a card slot 11 for carding the discharge energy receiving coil 7 and the signal transmission coil 8 is provided on the inner bottom end surface of the lower shell 6;

[0046] The thickness of the coil components after being stacked is equal to the distance from the bottom end of the card placement slot 11 to the bottom end surface of the pickup box 1 .

[0047] In this embodiment, the card slot 11 includes a spiral slot for carding the discharge energy receiving coil 7 and an annular slot for carding the signal transmission coil 8. The card slot prevents the coil from moving when the vehicle moves or is slightly hit, thereby improving the stability of the coil.

[0048] like Figure 1 , Figure 2 and Figure 7 As shown, the power assembly includes a plurality of mounting cavities installed in the pickup box 1, and a DC-HFAC power module 12 and a secondary resonant circuit module 13 are installed in the plurality of mounting cavities;

[0049] The input end of the secondary resonance circuit module 13 is connected to the power receiving coil 7 through the coil terminal 4, and the output end of the secondary resonance circuit module 13 is connected to the input end of the DC-HFAC power module 12;

[0050] A DC bus interface 14 is disposed on one side wall of the pickup box 1 , and the output end of the DC-HFAC power module 12 is connected to the inner side of the DC bus interface 14 via a copper bus.

[0051] In this embodiment, several modules are installed separately by providing several installation cavities, thereby avoiding the space waste caused by the dispersed layout in the traditional design. The compact arrangement between the modules enables the pickup end to fully exert its function within the limited chassis space, and also effectively improves the structural strength and vibration resistance of the system. The outlets of each module are close to the connected devices, which greatly reduces the wiring distance, reduces cable loss, makes the wiring more regular, and reduces the risk of interference caused by cable interlacing. At the same time, short-distance wiring also reduces the impact of electromagnetic interference (EMI), which helps to improve the stability of the system and charging efficiency.

[0052] In this embodiment, the output end of the DC bus interface 14 is connected to the on-board battery of the electric vehicle. The secondary resonant circuit module 13 includes a resonant capacitor plate and a resonant inductor, one end of the coil terminal 4 is connected to the resonant capacitor plate, the resonant capacitor plate is connected to the resonant inductor through a copper bus, and the resonant inductor is connected to the DC-HFAC power module 12 through a Litz wire. The high-frequency AC voltage induced by the electric energy receiving coil 7 is transmitted to the DC-HFAC power module 12 after resonance through the secondary resonant circuit module, and then transmitted to the on-board battery of the electric vehicle through the DC bus interface 14.

[0053] like Figure 1 , Figure 2 and Figure 7 As shown, a control board 15, a power board 16, a network port conversion module 17 and an OFDM module 18 are also installed in some of the installation cavities;

[0054] The output end of the power board 16 is connected to the power supply end of the control board 15 through a cable, and the communication interface on the control board 14 is connected to the network port conversion module 16 and the OFDM module 17 respectively.

[0055] like Figure 1 , Figure 2 and Figure 7 As shown, a network interface 19, a weak current interface 20, an antenna interface 21, and a water cooling interface 22 are provided on one side wall of the pickup box 1;

[0056] There are two groups of water cooling interfaces 22, and the inner sides of the two groups of water cooling interfaces 22 are respectively connected to the two ends of the cooling tank 2, the inner side of the network interface 19 is connected to the network port conversion module 16, the inner side of the weak current interface 20 is connected to the power board 16, and the inner side of the antenna interface 21 is connected to the control board 15.

[0057] In this embodiment, a backup power board 24 is also installed in the installation cavity. The backup power board 24 is a 12V power board. When the power board 15 fails to transmit, the backup power board 24 supplies power to the control board 15 to achieve system control in the event of a failure. The input end of the weak current interface 20 is connected to the vehicle-mounted V weak current. The power board 15 converts the vehicle-mounted V weak current into the DC voltage required by each module and supplies power to each module through a cable. Each outlet interface of the power board 15 is directly opposite to the corresponding power supply module, which greatly reduces the length of the cable.

[0058] In this embodiment, the power board 15 and the backup power board 24 are both installed in the direction of facing downward (i.e., the components are downward), and the heat-generating components such as the power module, switch tube and transformer on the power board 15 are bonded to the upper end surface of the cooling groove 2 through an aluminum substrate and thermal conductive silicone grease, thereby improving the heat dissipation effect.

[0059] In this embodiment, the upper right side of the control board 15 is a sampling interface and a drive wave output interface, which is responsible for processing the voltage and current sampling signals from the DC-HFAC power module 12 and outputting drive waves for it; the lower side is each communication interface. The network port conversion module 17 includes a network port to CAN module and a network port 1 to 2 module, both of which are connected to the communication interface.

[0060] In this embodiment, the network interface 19 leads the output network cable of the network port 1 to 2 module to the pickup end structure. The antenna interface 21 is used to lead the antenna on the control board 15 to the pickup end structure. The output end of the water cooling interface 22 is connected to the external circulating water circuit, and the heat generated during the operation of the pickup end structure is taken away through the circulation of the water circuit.

[0061] like Figure 1 , Figure 2 and Figure 7 As shown, a vent valve 23 is also provided on one side wall of the pickup box 1 to connect the inner and outer walls of the cavity;

[0062] An aluminum substrate is also provided in the cavity of the pickup box 1, the lower end surface of the aluminum substrate is connected to the inner bottom end surface of the pickup box 1 through thermal conductive silicone grease, and the upper end surface of the aluminum substrate is connected to the heating component of the power assembly through thermal conductive silicone grease.

[0063] In this embodiment, by controlling the breathable valve 23, the air pressure inside and outside the vehicle pickup end can be balanced under different temperatures and environmental conditions to avoid structural deformation or damage caused by air pressure difference. The present application makes the switching tube, transformer and other heat-generating components closely contact with the cooling tank 2 of the water circulation through the aluminum substrate and thermal conductive silicone grease by arranging the directions of the components such as the power supply board 15 and the DC-HFAC power module 12, so that the thermal conductivity is good and the heat dissipation effect of the system is improved.

[0064] In this embodiment, the input end of the OFDM module 18 is connected to the signal transmission coil 8 through the coil terminal 14, the output end of the OFDM module 18 is connected to the input end of the network port conversion module 17, and the output end of the network port conversion module 17 is connected to the input end of the control board 15; the signal transmission coil 8 obtains the signal transmission voltage through coupling and transmits it to the OFDM module 18, the OFDM module 18 processes the signal transmission voltage to obtain the signal, and then transmits it to the control board 15 through the network port conversion module 17.

[0065] Embodiment 2:

[0066] A wireless charging device comprises the vehicle-mounted pickup mechanism for wireless charging described in Example 1.

[0067] like Figure 2 As shown, it also includes a wireless charging transmitting mechanism, the transmitting mechanism includes a signal transmitting coil and a power transmitting coil, the signal transmitting coil is coupled with the signal receiving coil to transmit the signal, and the power transmitting coil is coupled with the power receiving coil to transmit the power.

[0068] In this embodiment, the transmitting mechanism also includes a signal modulation circuit, a primary high-frequency inverter and a primary resonant circuit module. The input end of the signal modulation circuit is connected to the signal transmitting coil. The signal modulation circuit is used to modulate the signal and transmit it to the signal transmitting coil. The input end of the high-frequency inverter is connected to a DC power supply, the input end of the primary resonant circuit module is connected to the output end of the high-frequency inverter, and the output end of the primary resonant circuit module is connected to the electric energy transmitting coil. As an embodiment of the present application, the primary resonant circuit module and the secondary resonant circuit module can be selected to be symmetrically arranged LC topology structure or LCC topology structure or LCL topology structure.

[0069] In this embodiment, during installation, the vehicle-mounted pickup mechanism is arranged to be integrated and installed on the vehicle chassis as a whole. This integrated device design can simplify the structure and reduce the complexity of installation, while maximizing the use of chassis space, effectively reducing cable length, and reducing the risk of electromagnetic interference. Since the chassis is located at the bottom of the vehicle and is directly exposed to the external environment, it may be eroded by rain, mud, corrosive substances, etc. Therefore, the screw material must have excellent corrosion resistance and mechanical strength, and stainless steel screws (such as 304 or 316 stainless steel) are used. This material not only provides sufficient corrosion resistance, but also has good mechanical properties, and can withstand various stresses generated during vehicle driving.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A wireless charging vehicle-mounted pickup mechanism, characterized in that: It comprises a pickup box (1) with an opening at the top, a coil assembly being installed at the bottom of the pickup box (1), and a power assembly being installed in the pickup box (1); The bottom end surface of the pickup box (1) is also provided with a winding cooling groove (2), the cross section of the cooling groove (2) is T-shaped, a cooling sealing plate (3) is installed on the upper part of the T-shaped groove of the cooling groove (2), and the bottom end surface of the pickup box (1) is provided with a mounting hole that passes through its inner cavity and the bottom end surface, and a coil terminal (4) is arranged in the mounting hole, and the coil assembly and the power assembly are connected via the coil terminal (4).

2. A wireless charging vehicle-mounted pickup mechanism according to claim 1, characterized in that: An upper cover plate (5) is installed on the top of the pickup box (1), and a lower shell (6) is installed on the bottom end surface of the pickup box (1); Sealing rings are provided between the upper cover plate (5) and the top end surface of the pickup box (1), and between the bottom end surface of the pickup box (1) and the top end surface of the lower shell (6).

3. The vehicle-mounted pickup mechanism for wireless charging according to claim 1, characterized in that: The coil assembly comprises an electric energy receiving coil (7), a signal transmission coil (8), a coil partition (9) and a coil core (10) which are arranged in sequence from bottom to top, and the upper end surface of the coil core (10) contacts the bottom end surface of the pickup box (1).

4. A wireless charging vehicle-mounted pickup mechanism according to claim 3, characterized in that: The inner bottom surface of the lower housing (6) is provided with a receiving slot (11) for receiving the discharge energy receiving coil (7) and the signal transmission coil (8); The thickness of the coil components after being stacked is equal to the distance from the bottom end of the card placement slot (11) to the bottom end surface of the pickup box (1).

5. The vehicle-mounted pickup mechanism for wireless charging according to claim 1, characterized in that: The power component comprises a plurality of installation cavities installed in the pickup box (1), wherein a DC-HFAC power module (12) and a secondary resonant circuit module (13) are installed in the plurality of installation cavities; The input end of the secondary resonance circuit module (13) is connected to the electric energy receiving coil (7) via the coil terminal (4), and the output end of the secondary resonance circuit module (13) is connected to the input end of the DC-HFAC power module (12); A DC bus interface (14) is provided on one side wall of the pickup box (1), and the output end of the DC-HFAC power module (12) is connected to the inner side of the DC bus interface (14) via a copper bus.

6. A wireless charging vehicle-mounted pickup mechanism according to claim 5, characterized in that: A control board (15), a power board (16), a network port conversion module (17) and an OFDM module (18) are also installed in the plurality of installation cavities; The output end of the power board (16) is connected to the power supply end of the control board (15) via a cable, and the communication interface on the control board (14) is respectively connected to the network port conversion module (16) and the OFDM module (17).

7. A wireless charging vehicle-mounted pickup mechanism according to claim 6, characterized in that: A network interface (19), a weak current interface (20), an antenna interface (21), and a water cooling interface (22) are arranged on one side wall of the pickup box (1); The number of the water cooling interfaces (22) is two groups, the inner sides of the two groups of water cooling interfaces (22) are respectively connected to the two ends of the cooling tank (2), the inner side of the network interface (19) is connected to the network port conversion module (16), the inner side of the weak current interface (20) is connected to the power board (16), and the inner side of the antenna interface (21) is connected to the control board (15).

8. The vehicle-mounted pickup mechanism for wireless charging according to claim 1, characterized in that: A vent valve (23) communicating with the inner and outer walls of the cavity is also provided on one side wall of the pickup box (1); An aluminum substrate is also provided in the cavity of the pickup box (1), the lower end surface of the aluminum substrate is connected to the inner bottom end surface of the pickup box (1) via thermal conductive silicone grease, and the upper end surface of the aluminum substrate is connected to the heat-generating component of the power assembly via thermal conductive silicone grease.

9. A wireless charging device, characterized in that: A vehicle-mounted pickup mechanism for wireless charging comprising any one of claims 1-8.

10. A wireless charging device according to claim 9, characterized in that: It also includes a wireless charging transmitting mechanism, which includes a signal transmitting coil and a power transmitting coil. The signal transmitting coil is coupled with the signal receiving coil to transmit signals, and the power transmitting coil is coupled with the power receiving coil to transmit power.

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