EPP and MPP selective configuration type wireless charging device

Abstract

The invention discloses an EPP and MPP selective configuration type wireless charging device, and belongs to the technical field of wireless charging. An EPP and MPP selective configuration type wireless charging device comprises an EPP pad, an MPP pad and a base shell, an installation clamping groove is formed in the outer surface of the base shell, lock catches are arranged on the two sides of the installation clamping groove, and the EPP pad and the MPP pad are connected with the installation clamping groove through the lock catches. In order to solve the problems that new MPP type wireless charging cannot be supported by an old wireless charger, a new wireless charger is needed, the wireless charging type of a mobile phone is changed after the mobile phone is replaced, and the existing vehicle cabin configuration cannot be used, a quick-release assembly structure design with one base and two modules is adopted. The two charger modules can be quickly disassembled and assembled, and an air duct structure compatible with the two modules is adopted for heat dissipation adaptation of the two modules, so that temperature control of the two modules during use can be guaranteed to the greatest extent.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless charging, and specifically to a wireless charging device with EPP and MPP selection and configuration type. Background Art

[0002] In a vehicle-mounted environment, a wireless charging device is usually used to charge a mobile phone. The newly emerged MPP type wireless charging cannot be supported by an old wireless charger and requires a new wireless charger. After changing the mobile phone, if the wireless charging type of the next mobile phone changes, the existing vehicle cockpit configuration cannot meet this new requirement. Summary of the Invention

[0003] The purpose of the present invention is to provide a wireless charging device with EPP and MPP selection and configuration type, which adopts a quick-disassembly and assembly structure design of one base and two modules. The two charger modules can be quickly disassembled and assembled. At the same time, for the heat dissipation adaptation of the two modules, an air duct structure compatible with the two modules is adopted, so that the temperature control of the two groups of modules can be guaranteed to the greatest extent during use, and the problems in the prior art can be solved.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A wireless charging device with EPP and MPP selection and configuration type, including an EPP pad, an MPP pad and a base housing. An installation card slot is provided on the outer surface of the base housing, and locking latches are provided on both sides of the installation card slot. Among them, both the EPP pad and the MPP pad are connected to the installation card slot through the locking latches. A heat dissipation air slot is provided at one end of the base housing, and a circuit board cover is provided inside the base housing. A heat dissipation air duct is provided on the outer surface of the circuit board cover. Among them, the heat dissipation air slot communicates with the heat dissipation air duct, and a heat dissipation fan is provided at one end of the heat dissipation air duct. The heat dissipation fan is connected to the heat dissipation air duct through a card slot.

[0005] Further, a module circuit board is provided inside the circuit board cover, and a base sealing plate is provided below the module circuit board. The base sealing plate is connected to the base housing by screws, and a fan shaft slot is provided on the outer surface of the base sealing plate. Among them, the heat dissipation fan penetrates through the module circuit board and extends into the inside of the fan shaft slot.

[0006] Further, the heat dissipation fan includes a bracket, an air inlet end and a diversion shell cover. Among them, the bracket is connected to the circuit board cover by screws. A fan is provided inside the air inlet end, and the fan is rotationally connected to the bracket through a bearing. An inner motor is provided inside the fan, and a guide head is provided inside the diversion shell cover. A turbine is provided between the guide head and the fan.

[0007] Further, the turbine is rotationally connected to the inner motor. The guide head is set as an arc cone structure, and an arc-shaped cavity is provided between the guide head and the diversion shell cover. The guide head extends out of the air outlet end of the diversion shell cover (403).

[0008] Furthermore, a temperature sensor and a microcontroller are provided inside the base sealing plate. The temperature sensor is electrically connected to the microcontroller, and the microcontroller is electrically connected to the inner motor, and controls heat dissipation in the following manner: The temperature sensor collects the temperature value inside the base housing in real time and transmits it to the microcontroller, and records the base temperature of the wireless charging device before starting charging as T0; The microcontroller counts the received temperature values and draws a temperature change curve, and respectively retrieves the historical temperature change curves L i， The value of i is 1 and 2, respectively representing the historical temperature change curves during EPP-type wireless charging process and MPP-type wireless charging process; Based on the historical temperature change curve L i respectively calculate the temperature change curvatures k within the first temperature change interval, the second temperature change interval, and the third temperature change interval t ; the value of t is 1 / 2 and 3; wherein the first temperature change interval is (25°~30°), the second temperature change interval is (30°~35°), and the third temperature change interval is (35°~45°).

[0009] When the temperature value reaches the first preset temperature threshold and the temperature change curvature reaches the first preset temperature change rate, the microcontroller controls the inner motor to start, and the inner motor drives the turbine to move at the first rotational speed; the first preset temperature threshold is greater than the maximum value of the first temperature change interval; When the temperature value reaches the second preset temperature threshold, or the temperature change rate reaches the second preset temperature change rate, the microcontroller controls the inner motor to start, and the inner motor drives the turbine to move at the second rotational speed; The turbine drives the fan to rotate, sucks in the cool air from the heat dissipation air duct into the intake end, and discharges the heat from the outlet end.

[0010] Furthermore, an EPP coil upper housing is provided inside the EPP pad. An EPP coil assembly is provided inside the EPP coil upper housing. An EPP coil circuit board is provided below the EPP coil assembly. An EPP coil lower housing is provided below the EPP coil circuit board. Among them, the EPP coil assembly is electrically connected to the EPP coil circuit board, and the EPP coil circuit board is respectively connected to the EPP coil lower housing and the EPP coil upper housing by screws.

[0011] Furthermore, an EPP coil upper shell is provided inside the EPP pad, an EPP coil assembly is provided inside the EPP coil upper shell, an EPP coil circuit board is provided below the EPP coil assembly, and an EPP coil lower shell is provided below the EPP coil circuit board, wherein the EPP coil assembly is electrically connected to the EPP coil circuit board, and the EPP coil circuit board is respectively connected to the EPP coil lower shell and the EPP coil upper shell by screws.

[0012] Furthermore, an MPP coil upper shell is arranged inside the MPP pad, wherein a circular groove is arranged on the surface of the MPP pad, an MPP magnet is arranged inside the MPP coil upper shell, an MPP coil assembly is arranged below the MPP magnet, and the MPP magnet is fitted with the MPP coil assembly.

[0013] Furthermore, an MPP coil circuit board is arranged below the MPP coil assembly, the MPP coil assembly is electrically connected to the MPP coil circuit board, an MPP coil lower shell is arranged below the MPP coil circuit board, an MPP thermal pad is arranged below the PP coil lower shell, an MPP Peltier is arranged below the MPP thermal pad, wherein a first MPP heat conductor and a second MPP heat conductor are arranged below the MPP Peltier.

[0014] Furthermore, the EPP coil assembly and the MPP coil assembly each include a transmitting coil, and the transmitting coil transmits a detection signal outward at a preset time interval to detect whether there is a wireless signal of an electronic device that needs wireless charging nearby; The microcontroller further comprises a charging mode adjustment module, which, when detecting a signal of an electronic device that needs to be charged, obtains the working state and remaining power of the electronic device, and adjusts the charging mode according to the working state of the electronic device and the temperature value of the wireless charging device; When the working state of the electronic device is in the screen-off state or the screen-on state with no software running, the charging mode adjustment module controls the use of a preset first constant power to charge the electronic device; When the temperature value in the base shell of the wireless charging device reaches a second preset temperature threshold, the charging mode adjustment module adjusts the charging output power to decrease, so that the adjusted charging output power can make the temperature value in the base shell of the wireless charging device less than the second preset temperature threshold after a unit time period, and the length of the unit time period is less than 2 minutes; If it is detected that the temperature value in the base housing of the wireless charging device is still higher than the second preset temperature threshold after the unit time period, the charging mode adjustment module controls to stop charging and enter the intermittent charging mode.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a quick-disassembly and assembly structure design of one base and two modules. When it is of the EPP type, the EPP charging module is assembled, and when it is of the MPP type, the MPP charging module is assembled. The two charger modules can be quickly disassembled and assembled. At the same time, for the heat dissipation adaptation of the two modules, an air duct structure compatible with the two modules is adopted, so as to ensure the temperature control of the two groups of modules to the greatest extent during use.

[0016] 2. The air flow direction generated by the eddy current fan of the present invention is perpendicular to the blade axis, and a high-pressure air flow is formed through centrifugal force, which can penetrate complex structures such as the heat spreader and heat dissipation fins inside the charger, solving the problem of limited heat dissipation space in the vehicle-mounted environment. The heat dissipation fin gap in the annular magnet area of the MPP module is small, and the eddy current fan can concentrate the air flow to penetrate, avoiding heat accumulation. With the customized air duct design, the air flow can accurately cover the heat generation core area, improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall front view of the present invention; Figure 2 is the schematic structural diagram of the base housing of the present invention; Figure 3 is the schematic structural diagram of the heat dissipation fan of the present invention; Figure 4 is the cross-sectional structural diagram of the heat dissipation fan of the present invention; Figure 5 is the schematic structural diagram of the EPP pad of the present invention; Figure 6 is the schematic structural diagram of the MPP pad of the present invention; Figure 7 is the wireless charging power supply flow chart of the present invention.

[0018] In the figure: 1. EPP pad; 2. MPP pad; 3. Base housing; 4. Cooling fan; 101. Upper EPP coil housing; 102. EPP coil assembly; 103. EPP coil circuit board; 104. Lower EPP coil housing; 105. EPP thermal pad; 106. EPP Peltier; 107. EPP heat conductor; 201. Upper MPP coil housing; 202. MPP magnet; 203. MPP coil assembly; 204. MPP coil circuit board; 205. Lower MPP coil housing; 206. MPP thermal pad; 207. MPP Peltier; 208. First MPP heat conductor; 209. Second MPP heat conductor; 301. Installation slot; 302. Circuit board cover; 303. Base sealing plate; 304. Module circuit board; 3011. Lock; 3012. Cooling air duct; 3021. Cooling air passage; 3031. Fan shaft slot; 401. Bracket; 402. Intake end; 403. Flow guide housing; 404. Fan; 405. Guide head; 406. Inner motor; 4041. Turbine; 407. Outlet end. Detailed implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] To solve the problem that the newly emerged MPP type wireless charging cannot be supported by the old wireless charger, a new wireless charger is required. After replacing the mobile phone, the wireless charging type of the mobile phone changes, and the existing vehicle cockpit configuration cannot be used; please refer to Figure 1-7 , the following technical solutions are provided in this embodiment: Embodiment 1:

[0021] An EPP and MPP selectable configuration wireless charging device, including an EPP pad 1, an MPP pad 2 and a base housing 3. Magnetic alignment contacts and six-pin spring pins are embedded at the bottom of each EPP pad 1 and MPP pad 2 for power supply and data communication. At the same time, the module shapes are different. Among them, the EPP pad 1 is a square structure, and the MPP pad 2 is a circular structure to prevent incorrect installation. Installation slots 301 are provided on the outer surface of the base housing 3, and locking latches 3011 are provided on both sides of the installation slots 301. Among them, the EPP pad 1 and the MPP pad 2 are both connected to the installation slots 301 through the locking latches 3011. A heat dissipation air groove 3012 is provided at one end of the base housing 3. A circuit board cover 302 is provided inside the base housing 3, and a heat dissipation air duct 3021 is provided on the outer surface of the circuit board cover 302. Among them, the heat dissipation air groove 3012 communicates with the heat dissipation air duct 3021. A heat dissipation fan 4 is provided at one end of the heat dissipation air duct 3021. The heat dissipation fan 4 can be embedded in the charger base or the back of the module, and is seamlessly combined with the air duct layer design to adapt to the different heat dissipation requirements of the EPP / MPP module. The heat dissipation fan 4 is connected to the heat dissipation air duct 3021 through a card slot. The base housing 3 is fixed in the vehicle. The module circuit board 304 integrates a general power management, a communication protocol stack (Qi2.0), a temperature sensor and a connection interface. The interface adopts a card slot + spring pin design to support quick plugging and unplugging and power / data transmission.

[0022] A module circuit board 304 is provided inside the circuit board cover 302. A base sealing plate 303 is provided below the module circuit board 304. The base sealing plate 303 is connected to the base housing 3 by screws. A fan shaft groove 3031 is provided on the outer surface of the base sealing plate 303. Among them, the heat dissipation fan 4 penetrates through the module circuit board 304 and extends into the interior of the fan shaft groove 3031. When it is of the EPP type, an EPP charging module is assembled. When it is of the MPP type, an MPP charging module is assembled. The two charger modules can be quickly disassembled and assembled, and the modification is carried out without disassembling the vehicle cockpit. Due to the need to adapt the two modules, the heat dissipation adopts an air duct structure that is compatible with the two modules, which can ensure the temperature control of the two groups of modules during use to the greatest extent. The heat dissipation air duct 3021 adopts deformable guide vanes, and the outlet shape is automatically adjusted by the pressure after the module is installed to adapt to the heat dissipation areas of the EPP and MPP modules. The heat dissipation air groove 3012 is located on the side of the base housing 3, and the air outlet is the fan shaft groove 3031 on the surface of the base sealing plate 303.

[0023] Inside the EPP pad 1, there is an EPP coil upper housing 101. Inside the EPP coil upper housing 101, there is an EPP coil assembly 102. Below the EPP coil assembly 102, there is an EPP coil circuit board 103. Below the EPP coil circuit board 103, there is an EPP coil lower housing 104. Among them, the EPP coil assembly 102 is electrically connected to the EPP coil circuit board 103. The EPP coil circuit board 103 is respectively connected to the EPP coil lower housing 104 and the EPP coil upper housing 101 by screws. Hole grooves are provided on the outer surfaces of both the EPP coil circuit board 103 and the EPP coil lower housing 104. Among them, below the EPP coil lower housing 104, there is an EPP heat conductive pad 105. Below the EPP heat conductive pad 105, there is an EPP Peltier 106. Below the EPP Peltier 106, there is an EPP heat conductor 107. The EPP heat conductor 107 extends into the interior of the EPP heat conductor 107. The EPP heat conductor 107 can play a very good heat conduction effect during the heat dissipation process and improve the heat dissipation efficiency.

[0024] Inside the MPP pad 2, there is an MPP coil upper housing 201. Among them, a circular slotted opening is provided on the surface of the MPP pad 2. Inside the MPP coil upper housing 201, there is an MPP magnet 202. Below the MPP magnet 202, there is an MPP coil assembly 203. The MPP magnet 202 is in contact with the MPP coil assembly 203. Below the MPP coil assembly 203, there is an MPP coil circuit board 204. The MPP coil assembly 203 is electrically connected to the MPP coil circuit board 204. Below the MPP coil circuit board 204, there is an MPP coil lower housing 205. Below the MPP coil lower housing 205, there is an MPP heat conductive pad 206. Below the MPP heat conductive pad 206, there is an MPP Peltier 207. Among them, below the MPP Peltier 207, there are a first MPP heat conductor 208 and a second MPP heat conductor 209.

[0025] The MPP module is usually used for the high-power transmitting end of wireless charging and needs to handle larger currents and higher power densities, resulting in a significant increase in the heat generation of chips and magnetic components. Therefore, a heat conductor structure is adopted to accelerate the transfer of heat from power devices to the environment by increasing the heat dissipation area. And at high power, hot spots are more likely to form inside the chip. The dual heat conductors can disperse the heat flow and avoid device failure caused by local overheating. Example 2:

[0026] During the use of EPP and MPP, the overall temperature of the device will rise. By setting an axial flow fan structure, it can assist the base in efficiently dissipating heat from the charging module, and at the same time, minimize the impact of wind noise on the driving environment.

[0027] The cooling fan 4 includes a bracket 401, an air inlet end 402, and a diversion housing 403. Among them, the bracket 401 is connected to the circuit board cover 302 by screws. Inside the air inlet end 402, there is a fan 404. The blade design of the centrifugal fan is optimized through fluid simulation, and the noise can be controlled ≤ 35 dB(A) at 4000 RPM, avoiding interference with in-vehicle voice calls or music playback. The fan 404 is rotationally connected to the bracket 401 through a bearing. Inside the fan 404, there is an inner motor 406. Inside the diversion housing 403, there is a guide head 405. Between the guide head 405 and the fan 404, there is a turbine 4041. The turbine 4041 is rotationally connected to the inner motor 406. The guide head 405 is set as an arc-shaped cone structure. Between the guide head 405 and the diversion housing 403, there is an arc-shaped annular cavity. The guide head 405 extends out of the air outlet end 407 of the diversion housing 403; The air flow direction generated by the eddy current fan is perpendicular to the fan blade axis. High-pressure air flow is formed through centrifugal force, which can penetrate complex structures such as the heat spreader and heat sink fins inside the charger, solving the problem of limited heat dissipation space in the vehicle-mounted environment. The gap between the heat sink fins in the annular magnet area of the MPP module is small, and the eddy current fan can concentrate the air flow to penetrate, avoiding heat accumulation. With the customized air duct design, the air flow can accurately cover the heat generation core area, improving the heat dissipation efficiency.

[0028] Further, a temperature sensor and a microcontroller are arranged inside the base seal plate 303. The temperature sensor is electrically connected to the microcontroller, and the microcontroller is electrically connected to the inner motor 406 and controls heat dissipation in the following way: The temperature sensor continuously collects the temperature value inside the base housing 3 and transmits it to the microcontroller, recording the base temperature T0 of the wireless charging device before starting charging; The microcontroller statistically receives the temperature values and draws a temperature change curve, and respectively retrieves the historical temperature change curves L i， The value of i is 1 and 2, respectively representing the historical temperature change curves in the EPP type wireless charging process and the MPP type wireless charging process; Based on the historical temperature change curves L i , respectively calculate the temperature change curvature k in the first temperature change interval, the second temperature change interval, and the third temperature change interval t ; the value of t is 1 / 2 and 3; among them, the first temperature change interval is (25°~30°), the second temperature change interval is (30°~35°), and the third temperature change interval is (35°~45°). Generally, it is considered that if the temperature value is higher than 45°, it means that the temperature is too high, and at this time, it is no longer suitable to continue wireless charging. Usually, unless the temperature of the vehicle-mounted environment itself is very high, the situation where the temperature of the wireless charging device is higher than 45° is relatively rare, so it is not considered as the temperature change interval range; When the temperature value reaches the first preset temperature threshold and the temperature change curvature reaches the first preset temperature change rate, the microcontroller controls the inner motor 406 to start, and the inner motor 406 drives the turbine 4041 to move at the first rotational speed; the value range of the first rotational speed is 1300 revolutions per minute - 1600 revolutions per minute, and the first preset temperature threshold is greater than the maximum value of the first temperature change interval; When the temperature value reaches the second preset temperature threshold or the temperature change rate reaches the second preset temperature change rate, the microcontroller controls the inner motor 406 to start, and the inner motor 406 drives the turbine 4041 to move at the second rotational speed; the value range of the second rotational speed is 2500 revolutions per minute - 2800 revolutions per minute; The turbine 4041 drives the fan 404 to rotate, sucking the cool air sucked in through the heat dissipation air duct 3012 along the heat dissipation air duct 3021 into the air inlet end 402, and discharging the heat from the air outlet end 407.

[0029] The principle and effect of the above technical solution are as follows: By setting a temperature sensor and a microcontroller in the base seal plate 303, the heat dissipation of the wireless charging device during the charging state can be controlled. Since each time wireless charging is carried out, it is usually charged within a certain time period. During the process from the start to the end of charging, without external intervention, the temperature of the wireless charging device will gradually increase. The microcontroller can record the temperature change situation during each charging process, and thus organize it into a historical temperature change curve. Due to the differences between the EPP type charging and the MPP type charging methods themselves, the temperature of the MPP type wireless charging rises faster in a short time. Therefore, the historical temperature change curves can be recorded separately, and different heat dissipation strategies can be adopted. When the current charging type is EPP type charging, the historical temperature change curve L is retrieved. 1， When the current charging type is MPP type charging, the historical temperature change curve L is retrieved. 2，When the temperature value reaches the first preset temperature threshold and the temperature change rate reaches the first preset temperature change rate at the same time, the microcontroller controls the inner motor 406 to drive the turbine 4041 to move at the first rotation speed, so as to dissipate heat. When the temperature value reaches the second preset temperature threshold or the temperature change rate reaches the second preset temperature change rate, the microcontroller controls the inner motor 406 to drive the turbine 4041 to move at the second rotation speed, so as to dissipate heat. This takes into account the situation where the temperature is too high but the temperature change rate is no longer high, or the temperature rises too fast in a short time but the temperature value itself has not reached the second preset temperature threshold. These two situations are both more damaging to the charging device and require rapid cooling. During the heat dissipation process, due to the rotation of the fan 404, the cooling gas in the external environment can be inhaled into the intake end 402 along the heat dissipation air duct 3021. In this process, the gas flow is formed to take away the heat and discharge it from the outlet end 407, so as to achieve temperature reduction. The above solution has high heat dissipation efficiency and is relatively intelligent, and can cool down targeted.

[0030] Preferably, since the too high temperature will affect the charging effect and the service life of the product during the continuous charging process of the wireless charging device, the intelligent adjustment for the charging mode set in the present invention is as follows. Specifically, both the EPP coil assembly 102 and the MPP coil assembly 203 include transmitting coils, and the transmitting coils emit detection signals outward at preset time intervals to detect whether there is a wireless signal of an electronic device that needs wireless charging nearby; a receiving coil is provided on the electronic device. When the electronic device approaches the wireless charging device and is placed at the charging position, the receiving coil enters the magnetic field generated by the transmitting coil, and an induced electromotive force will be generated in the receiving coil. The communication link is established between the transmitting coil and the receiving coil to enter the charging mode. The microcontroller further includes a charging mode adjustment module. When detecting the signal of the electronic device that needs to be charged, the charging mode adjustment module obtains the working state and remaining power of the electronic device, and adjusts the charging mode according to the working state of the electronic device and the temperature value of the wireless charging device. When the working state of the electronic device is in the screen-off state or the screen-on state without software running, the charging mode adjustment module controls to charge the electronic device with a preset first constant power. When the temperature value in the base housing 3 of the wireless charging device reaches the second preset temperature threshold, the charging mode adjustment module adjusts the charging output power to decrease, so that the adjusted charging output power can make the temperature value in the base housing 3 of the wireless charging device less than the second preset temperature threshold after a continuous unit time period, and the time length of the unit time period is less than 2 minutes. If it is detected that the temperature value in the base housing 3 of the wireless charging device is still higher than the second preset temperature threshold after the unit time period, the charging mode adjustment module controls to stop charging and enter the intermittent charging mode.

[0031] Among them, the intermittent charging mode means that after charging for a period of time, the charging stops and then enters the charging mode again. This intermittent charging mode can avoid the temperature of the wireless charging device and the electronic device from rising too high to the greatest extent.

[0032] The principle and effect of the above technical solution are that through the adjustment of the charging mode adjustment module, the charging mode can be adjusted specifically according to the working state of the electronic device and the temperature value of the wireless charging device, so as to avoid the charging effect being affected by excessive temperature rise. The premise for starting the intermittent charging mode is that the temperature value inside the base housing 3 of the wireless charging device is too high, and the expected temperature reduction effect has not been achieved after taking the temperature reduction measures of reducing the charging output power. Continuing to charge in this case will cause the temperature to be too high in the vehicle-mounted environment and affect the service life of the electronic device and the wireless charging device. Therefore, stopping charging in a timely and intelligent manner can effectively avoid excessive temperature, with a high degree of intelligence, especially having a good protection effect during the charging process of the MPP type.

[0033] Working principle: When in the EPP type, an EPP charging module is assembled, and when in the MPP type, an MPP charging module is assembled. The two charger modules can be quickly disassembled and assembled, and the modification can be carried out without disassembling the vehicle cockpit. Since the adaptation of the two modules is required, the heat dissipation adopts an air duct structure that is compatible with the two modules. In this way, the temperature control of the two groups of modules during use can be guaranteed to the greatest extent. The fan can be embedded in the charger base or the back of the module, seamlessly combined with the hierarchical design of the air duct. The air flow direction generated by the eddy current fan is perpendicular to the blade axis, and a high-pressure air flow is formed through centrifugal force, which can penetrate complex structures such as the heat dissipation plate and heat dissipation fins inside the charger, solving the problem of limited heat dissipation space in the vehicle-mounted environment. The heat dissipation fin gap in the annular magnet area of the MPP module is small, and the eddy current fan can concentrate the air flow to penetrate, avoiding heat accumulation. With the customized air duct design, the air flow can accurately cover the heat generation core area, improving the heat dissipation efficiency.

[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A wireless charging device with an EPP and MPP selection and configuration type, characterized in that, It includes an EPP pad (1), an MPP pad (2) and a base housing (3). An installation card slot (301) is provided on the outer surface of the base housing (3), and locking latches (3011) are provided on both sides of the installation card slot (301). Among them, both the EPP pad (1) and the MPP pad (2) are connected to the installation card slot (301) through the locking latches (3011). One end of the base housing (3) is provided with a heat dissipation air slot (3012). A circuit board cover (302) is provided inside the base housing (3), and a heat dissipation air duct (3021) is provided on the outer surface of the circuit board cover (302). Among them, the heat dissipation air slot (3012) and the heat dissipation air duct (3021) communicate with each other. One end of the heat dissipation air duct (3021) is provided with a heat dissipation fan (4), and the heat dissipation fan (4) is connected to the heat dissipation air duct (3021) through a card slot.

2. The EPP and MPP selection and configuration type wireless charging device according to claim 1, wherein: A module circuit board (304) is provided inside the circuit board cover (302). A base sealing plate (303) is provided below the module circuit board (304). The base sealing plate (303) is connected to the base housing (3) by screws. A fan shaft slot (3031) is provided on the outer surface of the base sealing plate (303). Among them, the heat dissipation fan (4) passes through the module circuit board (304) and extends into the inside of the fan shaft slot (3031).

3. The EPP and MPP selection and configuration type wireless charging device according to claim 2, characterized in that: The heat dissipation fan (4) includes a bracket (401), an air inlet end (402) and a guide shell cover (403). Among them, the bracket (401) is connected to the circuit board cover (302) by screws. A fan (404) is provided inside the air inlet end (402). The fan (404) is rotationally connected to the bracket (401) through a bearing. An inner motor (406) is provided inside the fan (404). A guide head (405) is provided inside the guide shell cover (403). A turbine (4041) is provided between the guide head (405) and the fan (404).

4. The EPP and MPP selection and configuration type wireless charging device according to claim 3, characterized in that: The turbine (4041) is rotationally connected to the inner motor (406). The guide head (405) is arranged in an arc cone structure. An arc-shaped cavity is provided between the guide head (405) and the guide shell cover (403). The guide head (405) extends out of the air outlet end (407) of the guide shell cover (403).

5. The EPP and MPP selection and configuration type wireless charging device according to claim 4, wherein: A temperature sensor and a microcontroller are provided inside the base sealing plate (303). The temperature sensor is electrically connected to the microcontroller. The microcontroller is electrically connected to the inner motor (406) and controls heat dissipation in the following way: The temperature sensor continuously collects the temperature value inside the base housing (3) and transmits it to the microcontroller, and records the base temperature before the wireless charging device starts charging as T0; The microcontroller counts the received temperature values and plots a temperature change curve, and retrieves the historical temperature change curves L i， The value of i is 1 and 2, representing the historical temperature change curves during the EPP type wireless charging process and the MPP type wireless charging process respectively; Based on the historical temperature change curve L i , calculate the temperature change curvature k in the first temperature change interval, the second temperature change interval, and the third temperature change interval respectively t ; the value of t is 1 / 2 and 3; where the first temperature change interval is (25°~30°), the second temperature change interval is (30°~35°), and the third temperature change interval is (35°~45°); When the temperature value reaches the first preset temperature threshold and the temperature change curvature reaches the first preset temperature change rate, the microcontroller controls the inner motor (406) to start, and the inner motor (406) drives the turbine (4041) to move at the first rotation speed; the first preset temperature threshold is greater than the maximum value of the first temperature change range; When the temperature value reaches the second preset temperature threshold or the temperature change rate reaches the second preset temperature change rate, the microcontroller controls the inner motor (406) to start, and the inner motor (406) drives the turbine (4041) to move at the second rotational speed; The turbine (4041) drives the fan (404) to rotate, sucking the cool air drawn in through the heat dissipation air duct (3012) along the heat dissipation air channel (3021) into the intake end (402), and discharging the heat from the outlet end (407).

6. The EPP and MPP selection and configuration type wireless charging device according to claim 5, wherein: An EPP coil upper housing (101) is provided inside the EPP pad (1). An EPP coil assembly (102) is provided inside the EPP coil upper housing (101). An EPP coil circuit board (103) is provided below the EPP coil assembly (102). An EPP coil lower housing (104) is provided below the EPP coil circuit board (103). Among them, the EPP coil assembly (102) is electrically connected to the EPP coil circuit board (103), and the EPP coil circuit board (103) is respectively connected to the EPP coil lower housing (104) and the EPP coil upper housing (101) by screws.

7. An EPP and MPP selection and configuration type wireless charging device according to claim 6, characterized in that: Hole grooves are provided on the outer surfaces of the EPP coil circuit board (103) and the EPP coil lower housing (104). Among them, an EPP heat conducting pad (105) is provided below the EPP coil lower housing (104). An EPP Peltier (106) is provided below the EPP heat conducting pad (105). An EPP heat conductor (107) is provided below the EPP Peltier (106), and the EPP heat conductor (107) extends into the interior of the heat dissipation air channel (3021).

8. An EPP and MPP selection and configuration type wireless charging device according to claim 6, characterized in that: An MPP coil upper housing (201) is provided inside the MPP pad (2). Among them, a circular slot is provided on the surface of the MPP pad (2). An MPP magnet (202) is provided inside the MPP coil upper housing (201). An MPP coil assembly (203) is provided below the MPP magnet (202), and the MPP magnet (202) is in contact with the MPP coil assembly (203).

9. The EPP and MPP selection and configuration type wireless charging device according to claim 8, characterized in that: An MPP coil circuit board (204) is provided below the MPP coil assembly (203). The MPP coil assembly (203) is electrically connected to the MPP coil circuit board (204). An MPP coil lower housing (205) is provided below the MPP coil circuit board (204). An MPP heat conducting pad (206) is provided below the MPP coil lower housing (205). An MPP Peltier (207) is provided below the MPP heat conducting pad (206). Among them, a first MPP heat conductor (208) and a second MPP heat conductor (209) are provided below the MPP Peltier (207).

10. An EPP and MPP selection and configuration type wireless charging device according to claim 8, characterized in that: Both the EPP coil assembly (102) and the MPP coil assembly (203) include transmitting coils, and the transmitting coils emit detection signals outward at preset time intervals for detecting wireless signals of electronic devices that need wireless charging nearby; The microcontroller further includes a charging mode adjustment module. When detecting a signal of an electronic device to be charged, the charging mode adjustment module obtains the working state and remaining power of the electronic device, and adjusts the charging mode according to the working state of the electronic device and the temperature value of the wireless charging device; When the working state of the electronic device is in the screen-off state or the screen-on state without software running, the charging mode adjustment module controls to charge the electronic device with a preset first constant power; When the temperature value in the base housing (3) of the wireless charging device reaches a second preset temperature threshold, the charging mode adjustment module adjusts the charging output power to decrease, so that the adjusted charging output power can make the temperature value in the base housing (3) of the wireless charging device less than the second preset temperature threshold after a continuous unit time period, and the time length of the unit time period is less than 2 minutes; If it is detected that the temperature value in the base housing (3) of the wireless charging device is still higher than the second preset temperature threshold after the unit time period, the charging mode adjustment module controls to stop charging and enter an intermittent charging mode.

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