A wireless charging test auxiliary device and test method

Abstract

The present invention relates to a wireless charging test auxiliary device and a test method, which comprises: a metal shell having an opening on one side, a signal light being installed on the metal shell; a metal plate being installed on the opening side of the metal shell; a semiconductor cooling sheet having a heat absorbing surface and a heat dissipating surface, the heat absorbing surface being attached to the side of the metal plate close to the inside of the metal shell, and a cooling fan being provided on one side of the heat dissipating surface; and a controller connected to the semiconductor cooling sheet, and the controller is also connected to the signal light and the cooling fan. Due to the thermal effect of the electric current, the temperature of the metal plate can reach a very high level, the semiconductor cooling sheet can utilize the temperature difference between the heat absorbing surface and the heat dissipating surface to generate direct current power to power the controller, the controller will power the signal light, and let the user know whether the device and the vehicle-mounted wireless charging module are working through an optical signal, and can support the vehicle-mounted wireless charging module to work for a long time in the laboratory.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless charging, and in particular to a wireless charging test auxiliary device and a test method. Background Art

[0002] The vehicle-mounted wireless charging module is an automotive component that allows the vehicle to charge power-consuming devices that support wireless charging functions, such as mobile phones. Before the vehicle-mounted wireless charging module is put on the market, it is necessary to carry out necessary performance, function, reliability and other tests in the laboratory, and corresponding test auxiliary equipment is needed to serve as a wireless power receiving load for the vehicle-mounted wireless charging module, or to check whether the vehicle-mounted wireless charging module is working properly on the actual vehicle.

[0003] In the related technology, the testing method is to directly use a power-consuming device that supports the wireless charging function as the load of the vehicle-mounted wireless charging module. After the wireless power of the vehicle-mounted wireless charging module is transmitted to the power-consuming device, the power-consuming device will receive the wireless power through the internal wireless receiving device, and then convert it into DC power through the converter to charge the battery inside the power-consuming device.

[0004] However, firstly, when verifying whether the vehicle-mounted wireless charging module is working properly, it is necessary to check the indication signals of the electrical equipment. Sometimes these indication signals may be indicator lights, and sometimes there are no special indications, which is not convenient for testing and monitoring. Secondly, the capacity of the battery inside the electrical equipment is limited, which is not suitable for working as a load for a long time. After being fully charged, the charging will stop, and it is easy to mistakenly judge that the vehicle-mounted wireless charging module is working abnormally.

[0005] Therefore, it is necessary to propose a new wireless charging test auxiliary equipment to solve the above problems. Summary of the invention

[0006] The embodiments of the present invention provide a wireless charging test auxiliary device and a test method to solve the problems in the related art that the charging capacity of the battery inside the electrical device is limited, the charging time is limited, and it is inconvenient to observe the charging status.

[0007] In the first aspect, a wireless charging test auxiliary device is provided, which includes: a metal shell having an opening on one side, and a signal light is installed on the metal shell; a metal plate, which is installed on the opening side of the metal shell; a semiconductor refrigeration plate, which has a heat absorption surface and a heat dissipation surface, the heat absorption surface is attached to the side of the metal plate close to the inside of the metal shell, and a cooling fan is provided on one side of the heat dissipation surface; a controller, which is connected to the semiconductor refrigeration plate, and the controller is also connected to the signal light and the cooling fan, and the controller is used to control the signal light to send a light signal and control the operation of the cooling fan; when the metal plate is in a changing magnetic field generated by an on-board wireless charging module, the changing magnetic field causes the metal plate to generate heat and transfer it to the semiconductor refrigeration plate, so that the temperature difference between the heat absorption surface and the heat dissipation surface generates DC power and supplies power to the controller.

[0008] In some embodiments, a photoelectric isolator is installed on the metal shell, the controller is connected to the photoelectric isolator, and the photoelectric isolator is connected to the test monitoring equipment via an optical fiber.

[0009] In some embodiments, a wireless communication module for communicating and interacting with the vehicle-mounted wireless charging module is disposed in the metal shell, and the wireless communication module is connected to the controller.

[0010] In some embodiments, an auxiliary battery is disposed in the metal shell, and the auxiliary battery is connected to the controller.

[0011] In some embodiments, a temperature sensor is disposed in the metal shell, and the temperature sensor is connected to the metal plate.

[0012] In some embodiments, a flange nut is installed on the metal plate, a ball screw is passed through the flange nut, one end of the ball screw is located inside the metal shell and connected to the adjusting motor, the adjusting motor is connected to the controller, and the other end of the ball screw is in contact with the end face of the vehicle-mounted wireless charging module; the ball screw can move along its axial direction and adjust the distance between the metal plate and the end face of the vehicle-mounted wireless charging module.

[0013] In a second aspect, a testing method for the wireless charging testing auxiliary device is provided, which comprises the following steps: placing the wireless charging testing auxiliary device within the wireless power transmission range of the vehicle-mounted wireless charging module; controlling the signal light to send a light signal, and controlling the cooling fan to operate.

[0014] In some embodiments, the controller is used to send the working status of the vehicle-mounted wireless charging module to the photoelectric isolator; the photoelectric isolator is used to convert the electrical signal into an optical signal, and the optical signal is transmitted to the test monitoring equipment through the optical fiber; the test monitoring equipment is used to parse the optical signal and display the working status of the vehicle-mounted wireless charging module.

[0015] In some embodiments, the controller is used to control the motor to drive the ball screw to rotate and adjust the distance between the metal plate and the end face of the vehicle-mounted wireless charging module.

[0016] In some embodiments, the controller is used to control the rotation speed of the cooling fan and adjust the temperature difference between the heat absorbing surface and the heat dissipating surface.

[0017] The beneficial effects brought about by the technical solution provided by the present invention include:

[0018] The embodiment of the present invention provides a wireless charging test auxiliary device and a test method, which can serve as a wireless power receiving load for a vehicle-mounted wireless charging module. When the metal plate is in a changing magnetic field generated by the vehicle-mounted wireless charging module, the thermal effect of the current can make the temperature of the metal plate reach a very high level. The semiconductor refrigeration plate can use the temperature difference between the heat absorption surface and the heat dissipation surface to generate DC power. The DC power is used to power the controller, and the controller will power the signal light. The controller can use optical signals to let the user know whether the device and the vehicle-mounted wireless charging module are working, and can support the vehicle-mounted wireless charging module to work for a long time in the laboratory for testing and verification, so as to facilitate understanding of whether the vehicle-mounted wireless charging module is working normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the overall structure of a wireless charging test auxiliary device provided by an embodiment of the present invention;

[0021] Figure 2 A flow chart of a method for increasing load in a test method of a wireless charging test auxiliary device provided by an embodiment of the present invention;

[0022] Figure 3 A flow chart of a method for reducing load in a test method of a wireless charging test auxiliary device provided by an embodiment of the present invention.

[0023] Numbers in the figure:

[0024] 1. Metal shell; 2. Metal plate; 3. Semiconductor refrigeration plate; 31. Heat absorption surface; 32. Heat dissipation surface; 4. Cooling fan; 5. Controller; 6. Signal light; 7. On-board wireless charging module; 8. Photoelectric isolator; 9. Wireless communication module; 10. Auxiliary battery; 11. Temperature sensor; 12. Flange nut; 13. Ball screw; 14. Adjustment motor. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The embodiments of the present invention provide a wireless charging test auxiliary device and a test method, which can solve the problems in the related art that the charging capacity of the battery inside the electrical device is limited, the charging time is limited, and it is inconvenient to observe the charging status.

[0027] See also Figure 1 As shown, a wireless charging test auxiliary device provided by an embodiment of the present invention may include a metal shell 1, a metal plate 2, a semiconductor cooling sheet 3, a cooling fan 4, a controller 5 and a signal light 6.

[0028] One side of the metal shell 1 has an opening, and a signal light 6 is installed on the metal shell 1. In this embodiment, the metal shell 1 is mainly used for electromagnetic shielding to prevent the electromagnetic waves of the internal controller 5, power conversion module, wireless power receiving module, cooling fan 4, signal light 6, and photoelectric isolator 8 from radiating outward, and secondly, it can be used as a heat dissipation path for the resistor. There will be a part of holes on the metal shell 1 as a channel for the photoelectric isolator 8 and the signal light 6 to interact with the outside and as a hot air outlet.

[0029] The metal plate 2 is installed on the opening side of the metal shell 1. In this embodiment, the metal plate 2 is mainly used to generate a relatively high temperature. When the metal plate 2 is in the changing magnetic field generated by the on-board wireless charging module 7, a vortex-shaped induced current is generated inside the metal plate 2. Since the resistance of the metal plate 2 is very small, the eddy current generated is very large, and the thermal effect of the current can make the temperature of the metal plate 2 reach a very high level.

[0030] The semiconductor refrigeration sheet 3 has a heat absorption surface 31 and a heat dissipation surface 32. The heat absorption surface 31 is attached to the side of the metal plate 2 close to the inside of the metal shell 1. A cooling fan 4 is provided on one side of the heat dissipation surface 32. In this embodiment, the semiconductor refrigeration sheet 3 mainly uses the temperature difference between the heat absorption surface 31 and the heat dissipation surface 32 to generate DC power, and the DC power is used to power the controller 5. The heat absorption surface 31 is attached to the metal plate 2 to absorb the heat of the metal plate 2, and the heat dissipation surface 32 is close to the air and the cooling fan 4. The cooling fan 4 is used to air-cool the heat dissipation surface 32 of the semiconductor refrigeration sheet 3. The heat dissipation surface 32 is kept at a low temperature by the air and the cooling fan 4, so that a certain temperature difference can be maintained, and DC power can be continuously generated. It should be noted that the semiconductor refrigeration sheet 3 is a refrigeration device manufactured according to the Peltier effect, which has high heat conversion efficiency, compact structure, and is suitable for scenes with large temperature differences. The output voltage and current of the semiconductor refrigeration sheet 3 are limited, and the semiconductor refrigeration sheet 3 can be operated in parallel or in series to meet the working voltage and working power requirements of electrical components such as the controller 5.

[0031] The controller 5 is connected to the semiconductor cooling sheet 3. The controller 5 is also connected to the signal light 6 and the cooling fan 4. The controller 5 is used to control the signal light 6 to send a light signal and control the cooling fan 4 to operate. In this embodiment, the controller 5 will supply power to the signal light 6 and inform the user through the light signal that the device is working properly, so that the user can understand whether the device and the vehicle-mounted wireless charging module 7 are working. The controller 5 is used to control the working state of the cooling fan 4 and monitor the temperature of the metal plate 2, and communicate with the outside world through the photoelectric isolator 8 and the wireless communication module 9. When the metal plate 2 is in the changing magnetic field generated by the vehicle-mounted wireless charging module 7, the changing magnetic field causes the metal plate 2 to generate heat and transfer it to the semiconductor cooling sheet 3, so that the temperature difference between the heat absorption surface 31 and the heat dissipation surface 32 generates DC power and supplies power to the controller 5.

[0032] See also Figure 1 As shown, in some embodiments, a photoelectric isolator 8 is installed on the metal shell 1, the controller 5 is connected to the photoelectric isolator 8, and the photoelectric isolator 8 is connected to the test monitoring equipment through an optical fiber. The photoelectric isolator 8 is used to transmit the current working status to the outside through a photoelectric signal to help users monitor the test status. The photoelectric isolation can convert electrical signals into optical signals to avoid interference to the outside world and avoid external interference from affecting the device and the vehicle-mounted wireless charging module 7.

[0033] See also Figure 1As shown, in some embodiments, a wireless communication module 9 for communicating and interacting with the vehicle-mounted wireless charging module 7 is provided in the metal shell 1. The wireless communication module 9 is connected to the controller 5. The wireless communication module 9 is used to communicate and interact with the vehicle-mounted wireless charging module 7 to ensure that the wireless charging works normally according to the charging protocol.

[0034] See also Figure 1 As shown, in some embodiments, an auxiliary battery 10 is provided in the metal shell 1, and the auxiliary battery 10 is connected to the controller 5. The auxiliary battery 10 is used to supply power to the controller 5 and to supply power to other electrical components through the controller 5.

[0035] See also Figure 1 As shown, in some embodiments, a temperature sensor 11 is disposed in the metal shell 1 , and the temperature sensor 11 is connected to the metal plate 2 . The temperature sensor 11 is used to monitor the temperature of the metal plate 2 .

[0036] See also Figure 1 As shown, in some embodiments, a flange nut 12 is installed on the metal plate 2, and a ball screw 13 is inserted into the flange nut 12. One end of the ball screw 13 is located inside the metal shell 1 and is connected to the adjustment motor 14. The adjustment motor 14 is connected to the controller 5. The other end of the ball screw 13 contacts the end face of the vehicle-mounted wireless charging module 7. The ball screw 13 can move along its axial direction and adjust the distance between the metal plate 2 and the end face of the vehicle-mounted wireless charging module 7. In this embodiment, the ball screw 13, the flange nut 12 and the adjustment motor 14 are used to adjust the distance between the metal plate 2 and the end face of the vehicle-mounted wireless charging module 7. Among them, the adjustment motor 14 is fixed on the metal shell 1 and controlled by the controller 5, and is used to drive the ball screw 13 to rotate. The flange nut 12 is embedded in the metal plate 2. One end of the ball screw 13 is connected to the adjustment motor 14 and passes through the flange nut 12, and the other end contacts the end face of the vehicle-mounted wireless charging module 7. When the adjusting motor 14 drives the ball screw 13 to rotate, the flange nut 12 will slide on the ball screw 13 and drive the metal plate 2 to slide, so that the distance between the metal plate 2 and the end face of the vehicle-mounted wireless charging module 7 changes.

[0037] In other embodiments, the distance between the metal plate 2 and the end surface of the vehicle-mounted wireless charging module 7 may be adjusted in other ways, such as a telescopic device or a snap-on structure.

[0038] See also Figure 2 and Figure 3As shown, when the device is used as a test auxiliary device for the vehicle-mounted wireless charging module 7, the output load of the vehicle-mounted wireless charging module 7 can be adjusted in two ways. When the load needs to be increased, one way is that the controller 5 drives the ball screw 13 to rotate by adjusting the motor 14, drives the metal plate 2 to slide, and reduces the gap between the metal plate 2 and the end face of the vehicle-mounted wireless charging module 7. When the distance is closer, the electromagnetic field generated by the vehicle-mounted wireless charging module 7 is more consumed and absorbed by the metal plate 2 and generates eddy currents inside the metal plate 2, generating higher heat energy, which essentially increases the output load of the vehicle-mounted wireless charging module 7. Another way is that the controller 5 can control the cooling fan 4 to work at a faster speed, so that the heat dissipation surface 32 of the semiconductor cooling plate 3 can dissipate heat faster and reduce the temperature of the heat dissipation surface 32. On the one hand, by increasing the temperature difference between the heat absorption surface 31 and the heat dissipation surface 32 of the semiconductor cooling plate 3, the semiconductor cooling plate 3 can output more DC power (actually equivalent to converting more heat energy of the metal plate 2 into electrical energy), and on the other hand, the cooling fan 4 works at a faster speed to consume more DC power of the semiconductor cooling plate 3. When the load needs to be reduced, one way is that the controller 5 drives the ball screw 13 to rotate by adjusting the motor 14, drives the metal plate 2 to slide, and increases the gap between the metal plate 2 and the end face of the vehicle-mounted wireless charging module 7. When the gap increases, the electromagnetic field generated by the vehicle-mounted wireless charging module 7 is less consumed and absorbed by the metal plate 2 and generates eddy currents inside the metal plate 2, generating less heat energy, which essentially reduces the output load of the vehicle-mounted wireless charging module 7. Another way is that the controller 5 can control the cooling fan 4 to work at a slower speed, so that the heat dissipation surface 32 of the semiconductor refrigeration plate 3 can dissipate heat more slowly and the temperature of the heat dissipation surface 32 will be relatively higher. In this way, on the one hand, the temperature difference between the heat absorption surface 31 and the heat dissipation surface 32 of the semiconductor refrigeration plate 3 can be reduced, so that the semiconductor refrigeration plate 3 outputs less DC power (actually equivalent to converting less heat energy of the metal plate 2 into electrical energy), and on the other hand, the cooling fan 4 consumes less DC power of the semiconductor refrigeration plate 3 by working at a slower speed.

[0039] The embodiment of the present invention also provides a test method for a wireless charging test auxiliary device, which may include the following steps: placing the wireless charging test auxiliary device within the wireless power transmission range of the vehicle-mounted wireless charging module 7; controlling the signal light 6 to send a light signal, and controlling the cooling fan 4 to operate, which can help the user to conveniently and quickly understand whether the vehicle-mounted wireless charging module 7 is working properly through the special signal light 6, and can support the vehicle-mounted wireless charging module 7 to work for a long time in the laboratory for testing and verification. The test method can also implement any embodiment of the wireless charging test auxiliary device described above.

[0040] The controller 5 is used to send the working status of the vehicle-mounted wireless charging module 7 to the photoelectric isolator 8; the photoelectric isolator 8 is used to convert the electrical signal into an optical signal, and the optical signal is transmitted to the test monitoring equipment through the optical fiber; the test monitoring equipment is used to analyze the optical signal and display the working status of the vehicle-mounted wireless charging module 7, which can be used in special scenarios such as electromagnetic compatibility testing, so as to facilitate understanding whether the vehicle-mounted wireless charging module 7 is working normally without introducing new electromagnetic interference.

[0041] The controller 5 is used to control the adjustment motor 14 to drive the ball screw 13 to rotate, and adjust the distance between the metal plate 2 and the end face of the vehicle-mounted wireless charging module 7. The controller 5 is used to control the rotation speed of the cooling fan 4 and adjust the temperature difference between the heat absorption surface 31 and the heat dissipation surface 32. When the device is used as a test auxiliary device for the vehicle-mounted wireless charging module 7, the output load of the vehicle-mounted wireless charging module 7 can be adjusted in two ways.

[0042] The wireless charging test auxiliary device provided in this embodiment is used to provide a receiving load for the vehicle-mounted wireless charging module 7. When used to perform a simple inspection test on the vehicle-mounted wireless charging module 7 in a real vehicle scenario, the device may include the following steps:

[0043] Step 1: Place the device within the wireless power transmission range of the vehicle-mounted wireless charging module 7.

[0044] Step 2: The auxiliary battery 10 inside the device supplies power to the controller 5 and controls the wireless communication module 9 to try to communicate with the vehicle-mounted charging module.

[0045] Step 3: After the vehicle-mounted wireless charging module 7 communicates with the wireless communication module 9 of the device and the handshake is successful, the vehicle-mounted wireless charging module 7 sends a changing electromagnetic field.

[0046] Step 4: When the metal plate 2 is in the changing magnetic field generated by the on-board wireless charging module 7, a vortex-shaped induced current is generated inside the metal plate 2. Since the resistance of the metal plate 2 is very small, the generated eddy current is very large, and the thermal effect of the current can make the temperature of the metal plate 2 reach a very high level.

[0047] Step 5: The heat absorbing surface 31 of the semiconductor refrigeration plate 3 absorbs the high temperature on the surface of the metal plate 2 and uses the temperature difference between the high temperature of the heat absorbing surface 31 and the low temperature of the heat dissipation surface 32 to generate DC power, which is used to power the controller 5.

[0048] Step 6: The controller 5 controls the cooling fan 4 to work, and the flowing air takes away the heat of the heat dissipation surface 32 of the semiconductor refrigeration plate 3, so that the heat absorption surface 31 and the heat dissipation surface 32 of the semiconductor refrigeration plate 3 maintain a sufficient temperature difference, and continuously generate DC power.

[0049] Step 7: The controller 5 monitors the temperature of the metal plate 2 through the temperature sensor 11 and controls the working intensity of the cooling fan 4 to ensure the overall safe and stable operation of the equipment.

[0050] Step 8: The controller 5 will supply power to the signal light 6 and inform the user through a light signal that the device is working properly. The user can judge whether the device and the vehicle-mounted wireless charging module 7 are working properly by whether the signal light 6 is on. If the green light is on, it means that the communication and interaction between the device and the vehicle-mounted wireless charging module 7 are normal, and the vehicle-mounted wireless charging module 7 can send electromagnetic fields normally. If the yellow light is on, it means that the communication and interaction between the device and the vehicle-mounted wireless charging module 7 are normal, but the vehicle-mounted wireless charging module 7 does not send electromagnetic fields. If the red light is on, it means that there is no communication and interaction between the device and the vehicle-mounted wireless charging module 7.

[0051] Step 9: When the load needs to be increased, one way is that the controller 5 drives the ball screw 13 to rotate by adjusting the motor 14, drives the metal plate 2 to slide, and reduces the gap between the metal plate 2 and the end face of the vehicle-mounted wireless charging module 7. When the distance is closer, the electromagnetic field generated by the vehicle-mounted wireless charging module 7 is more consumed and absorbed by the metal plate 2 and generates eddy currents inside the metal plate 2, generating higher heat energy, which essentially increases the output load of the vehicle-mounted wireless charging module 7. Another way is that the controller 5 can control the cooling fan 4 to work at a faster speed, so that the heat dissipation surface 32 of the semiconductor cooling plate 3 can dissipate heat faster and reduce the temperature of the heat dissipation surface 32. On the one hand, by increasing the temperature difference between the heat absorption surface 31 and the heat dissipation surface 32 of the semiconductor cooling plate 3, the semiconductor cooling plate 3 can output more DC power (actually equivalent to converting more heat energy of the metal plate 2 into electrical energy), and on the other hand, the cooling fan 4 works at a faster speed to consume more DC power of the semiconductor cooling plate 3.

[0052] Step 10: When the load needs to be reduced, one way is that the controller 5 drives the ball screw 13 to rotate by adjusting the motor 14, drives the metal plate 2 to slide, and increases the gap between the metal plate 2 and the end face of the vehicle-mounted wireless charging module 7. When the gap increases, the electromagnetic field generated by the vehicle-mounted wireless charging module 7 is less consumed and absorbed by the metal plate 2 and generates eddy currents inside the metal plate 2, generating less heat energy, which essentially reduces the output load of the vehicle-mounted wireless charging module 7. Another way is that the controller 5 can control the cooling fan 4 to work at a slower speed, so that the heat dissipation surface 32 of the semiconductor cooling plate 3 can dissipate heat more slowly and the temperature of the heat dissipation surface 32 will be relatively higher. On the one hand, by reducing the temperature difference between the heat absorption surface 31 and the heat dissipation surface 32 of the semiconductor cooling plate 3, the semiconductor cooling plate 3 can output less DC power (actually equivalent to converting less heat energy of the metal plate 2 into electrical energy), and on the other hand, the cooling fan 4 consumes less DC power of the semiconductor cooling plate 3 by working at a slower speed.

[0053] A wireless charging test auxiliary device provided in this embodiment is used to serve as a receiving load for a vehicle-mounted charging module, and to test the vehicle-mounted charging module in an EMC test scenario, which may include the following steps:

[0054] Step 1: Place the device within the wireless power transmission range of the vehicle-mounted wireless charging module 7.

[0055] Step 2: The auxiliary battery 10 inside the device supplies power to the controller 5 and controls the wireless communication module 9 to try to communicate with the vehicle-mounted charging module.

[0056] Step 3: After the vehicle-mounted wireless charging module 7 communicates with the wireless communication module 9 of the device and the handshake is successful, the vehicle-mounted wireless charging module 7 sends a changing electromagnetic field.

[0057] Step 4: When the metal plate 2 is in the changing magnetic field generated by the on-board wireless charging module 7, a vortex-shaped induced current is generated inside the metal plate 2. Since the resistance of the metal plate 2 is very small, the generated eddy current is very large, and the thermal effect of the current can make the temperature of the metal plate 2 reach a very high level.

[0058] Step 5: The heat absorbing surface 31 of the semiconductor refrigeration plate 3 absorbs the high temperature on the surface of the metal plate 2 and uses the temperature difference between the high temperature of the heat absorbing surface 31 and the low temperature of the heat dissipation surface 32 to generate DC power, which is used to power the controller 5.

[0059] Step 6: The controller 5 controls the cooling fan 4 to work, and the flowing air takes away the heat of the heat dissipation surface 32 of the semiconductor refrigeration plate 3, so that the heat absorption surface 31 and the heat dissipation surface 32 of the semiconductor refrigeration plate 3 maintain a sufficient temperature difference, and continuously generate DC power.

[0060] Step 7: The controller 5 monitors the temperature of the metal plate 2 through the temperature sensor 11 and controls the working intensity of the cooling fan 4 to ensure the overall safe and stable operation of the equipment.

[0061] Step 8: The controller 5 will supply power to the signal light 6 and inform the user through a light signal that the device is working properly. The user can judge whether the device and the vehicle-mounted wireless charging module 7 are working properly by whether the signal light 6 is on. If the green light is on, it means that the communication and interaction between the device and the vehicle-mounted wireless charging module 7 are normal, and the vehicle-mounted wireless charging module 7 can send electromagnetic fields normally. If the yellow light is on, it means that the communication and interaction between the device and the vehicle-mounted wireless charging module 7 are normal, but the vehicle-mounted wireless charging module 7 does not send electromagnetic fields. If the red light is on, it means that there is no communication and interaction between the device and the vehicle-mounted wireless charging module 7.

[0062] Step 9: The photoelectric isolator 8 can be connected to the test monitoring device via optical fiber. The controller 5 sends the working status of the vehicle-mounted wireless charging module 7 to the photoelectric isolator 8, and the photoelectric isolator 8 converts the electrical signal into an optical signal, which is transmitted to the test monitoring device via optical fiber. The test monitoring device analyzes the optical signal and displays the working status of the vehicle-mounted wireless charging module 7. Transmitting signals via optical fiber can prevent external electromagnetic field interference from affecting the device and the vehicle-mounted wireless charging module 7, which is particularly important when conducting electromagnetic compatibility testing.

[0063] Step 10: When the load needs to be increased, one way is that the controller 5 drives the ball screw 13 to rotate by adjusting the motor 14, drives the metal plate 2 to slide, and reduces the gap between the metal plate 2 and the end face of the vehicle-mounted wireless charging module 7. When the distance is closer, the electromagnetic field generated by the vehicle-mounted wireless charging module 7 is more consumed and absorbed by the metal plate 2 and generates eddy currents inside the metal plate 2, generating higher heat energy, which essentially increases the output load of the vehicle-mounted wireless charging module 7. Another way is that the controller 5 can control the cooling fan 4 to work at a faster speed, so that the heat dissipation surface 32 of the semiconductor cooling plate 3 can dissipate heat faster and reduce the temperature of the heat dissipation surface 32. On the one hand, by increasing the temperature difference between the heat absorption surface 31 and the heat dissipation surface 32 of the semiconductor cooling plate 3, the semiconductor cooling plate 3 can output more DC power (actually equivalent to converting more heat energy of the metal plate 2 into electrical energy), and on the other hand, the cooling fan 4 works at a faster speed to consume more DC power of the semiconductor cooling plate 3.

[0064] Step 11: When the load needs to be reduced, one way is that the controller 5 drives the ball screw 13 to rotate by adjusting the motor 14, drives the metal plate 2 to slide, and increases the gap between the metal plate 2 and the end face of the vehicle-mounted wireless charging module 7. When the gap increases, the electromagnetic field generated by the vehicle-mounted wireless charging module 7 is less consumed and absorbed by the metal plate 2 and generates eddy currents inside the metal plate 2, generating less heat energy, which essentially reduces the output load of the vehicle-mounted wireless charging module 7. Another way is that the controller 5 can control the cooling fan 4 to work at a slower speed, so that the heat dissipation surface 32 of the semiconductor cooling plate 3 can dissipate heat more slowly and the temperature of the heat dissipation surface 32 will be relatively higher. In this way, on the one hand, the temperature difference between the heat absorption surface 31 and the heat dissipation surface 32 of the semiconductor cooling plate 3 can be reduced, so that the semiconductor cooling plate 3 outputs less DC power (actually equivalent to converting less heat energy of the metal plate 2 into electrical energy), and on the other hand, the cooling fan 4 consumes less DC power of the semiconductor cooling plate 3 by working at a slower speed.

[0065] The principles of a wireless charging test auxiliary device and a test method provided by an embodiment of the present invention are as follows:

[0066] This device is mainly made based on the eddy current effect and the Peltier effect, and can serve as a wireless energy receiving load for the vehicle-mounted wireless charging module 7. When the metal plate 2 is in the changing magnetic field generated by the vehicle-mounted wireless charging module 7, the thermal effect of the current can make the temperature of the metal plate 2 reach a very high level. The semiconductor cooling plate 3 can use the temperature difference between the heat absorption surface 31 and the heat dissipation surface 32 to generate DC power. The DC power is used to power the controller 5, and the controller 5 will power the signal light 6, and use the optical signal to let the user know whether the device and the vehicle-mounted wireless charging module are working. Therefore, it can help the user in the actual vehicle environment. It is convenient and quick to understand whether the vehicle-mounted wireless charging module 7 is working properly. It can be used to support long-term environmental reliability, durability and other tests of the vehicle-mounted wireless charging module 7 in a laboratory environment. Because the device interacts with the outside world through optical fiber to conduct signals, it avoids transmitting interference to the outside world and avoiding external interference affecting the vehicle-mounted wireless charging module 7. It has a metal shell 1, which can prevent the internal controller 5 from radiating electromagnetic interference to the outside world. Therefore, it can be used in special scenarios such as electromagnetic compatibility testing, has good anti-interference performance, and will not introduce new electromagnetic interference, which is convenient for understanding whether the vehicle-mounted wireless charging module 7 is working properly.

[0067] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0068] It should be noted that, in the present invention, 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 terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0069] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A wireless charging test auxiliary device, characterized in that: It includes: A metal shell (1) having an opening on one side, wherein a signal light (6) is mounted on the metal shell (1); A metal plate (2) mounted on the opening side of the metal shell (1); A semiconductor cooling sheet (3) having a heat absorbing surface (31) and a heat dissipating surface (32), wherein the heat absorbing surface (31) is attached to a side of the metal plate (2) close to the inside of the metal shell (1), and a cooling fan (4) is provided on one side of the heat dissipating surface (32); A controller (5) connected to the semiconductor cooling sheet (3), the controller (5) also connected to the signal light (6) and the cooling fan (4), the controller (5) being used to control the signal light (6) to send a light signal and to control the cooling fan (4) to operate; When the metal plate (2) is in a changing magnetic field generated by the on-board wireless charging module (7), the changing magnetic field causes the metal plate (2) to generate heat and transfer it to the semiconductor cooling plate (3), so that the temperature difference between the heat absorbing surface (31) and the heat dissipating surface (32) generates direct current energy and supplies power to the controller (5); A flange nut (12) is mounted on the metal plate (2), a ball screw (13) is inserted into the flange nut (12), one end of the ball screw (13) is located inside the metal shell (1) and is connected to an adjustment motor (14), the adjustment motor (14) is connected to the controller (5), and the other end of the ball screw (13) is in contact with an end surface of the on-board wireless charging module (7); The ball screw (13) can move along its axial direction and adjust the distance between the metal plate (2) and the end surface of the on-board wireless charging module (7).

2. The wireless charging test auxiliary device according to claim 1, characterized in that: A photoelectric isolator (8) is installed on the metal shell (1), the controller (5) is connected to the photoelectric isolator (8), and the photoelectric isolator (8) is connected to the test monitoring equipment via an optical fiber.

3. The wireless charging test auxiliary device according to claim 1, characterized in that: A wireless communication module (9) for communicating and interacting with the on-board wireless charging module (7) is provided in the metal shell (1); the wireless communication module (9) is connected to the controller (5).

4. The wireless charging test auxiliary device according to claim 1, characterized in that: An auxiliary battery (10) is provided in the metal shell (1), and the auxiliary battery (10) is connected to the controller (5).

5. The wireless charging test auxiliary device according to claim 1, characterized in that: A temperature sensor (11) is provided in the metal shell (1), and the temperature sensor (11) is connected to the metal plate (2).

6. A method for testing the wireless charging test auxiliary device as claimed in claim 1, characterized in that: It includes the following steps: Placing the wireless charging test auxiliary device within the wireless power transmission range of the vehicle-mounted wireless charging module (7); The control signal lamp (6) sends a light signal and controls the cooling fan (4) to operate.

7. The testing method according to claim 6, characterized in that: The test method also includes: Using a controller (5) to send the working status of the vehicle-mounted wireless charging module (7) to a photoelectric isolator (8); The photoelectric isolator (8) is used to convert the electrical signal into an optical signal, and the optical signal is transmitted to the test monitoring equipment via an optical fiber; The test monitoring device is used to analyze the optical signal and display the working status of the vehicle-mounted wireless charging module (7).

8. The testing method according to claim 6, characterized in that: The test method also includes: The controller (5) is used to control the regulating motor (14) to drive the ball screw (13) to rotate, and to adjust the distance between the metal plate (2) and the end surface of the vehicle-mounted wireless charging module (7).

9. The testing method according to claim 6, characterized in that: The test method also includes: The controller (5) is used to control the rotation speed of the cooling fan (4) and to adjust the temperature difference between the heat absorbing surface (31) and the heat dissipating surface (32).

Images