Vehicle-mounted wireless charger and automobile

Abstract

The utility model discloses a vehicle-mounted wireless charger and an automobile. The vehicle-mounted wireless charger comprises a wireless charging mainboard, an electric fan and a temperature measuring device, the temperature measuring device is arranged on the wireless charging main board and is connected with a controller on the wireless charging main board; the fan is connected with a controller and a power supply on the wireless charging mainboard; the controller is used for controlling the fan to rotate when the temperature, measured by the temperature measuring device, of the wireless charging mainboard is larger than a temperature threshold value; and when the temperature of the wireless charging mainboard is smaller than or equal to the temperature threshold value, the fan is controlled not to rotate. According to the technical scheme, the use scene of the fan when the wireless charging terminal equipment is charged is rationalized, consumption of lubricating grease in the fan is reduced, and abnormal sound generated in the working process of the fan is avoided as much as possible.

Description

Technical Field

[0001] The present application relates to the field of wireless charging technology, and in particular to a vehicle-mounted wireless charger and a vehicle. Background Art

[0002] With the development of mobile phone wireless charging technology, cars are now also equipped with in-car wireless chargers. After the car is started, the in-car wireless charger can wirelessly charge the mobile phone without the need to frequently plug in and out the wired charger.

[0003] When a mobile phone is charged through a car wireless charger, there is a certain loss in the process of power transmission and reception because the working mode of wireless charging is to transfer energy through coil coupling. Part of the loss comes from the heat generated by the internal structural components during the wireless charging process. Currently, mobile phones are equipped with high temperature protection. When the temperature of the mobile phone exceeds a certain temperature, the charging will stop. The car wireless charger is equipped with a fan to dissipate the heat of the mobile phone to avoid frequent high temperature protection of the mobile phone.

[0004] The fan includes a bearing and a shaft core. Lubricating grease is provided at the junction of the bearing and the shaft core to form an oil film through the lubricating grease to reduce abnormal noise when the fan is working. However, the lubricating grease will continue to be consumed during the operation of the fan. When the amount of lubricating grease is small, the lubrication effect is poor and the fan will still produce abnormal noise when working. Utility Model Content

[0005] In view of this, the present application provides a vehicle-mounted wireless charger and a vehicle, which can reduce the consumption of lubricating grease in the fan and try to avoid abnormal noise during the operation of the fan.

[0006] The present application provides a vehicle-mounted wireless charger, comprising: a wireless charging mainboard, an electric fan and a temperature measuring device; the temperature measuring device is arranged on the wireless charging mainboard, and the temperature measuring device is connected to a controller on the wireless charging mainboard;

[0007] The electric fan is connected to the controller and the power supply on the wireless charging mainboard;

[0008] The controller is used to control the electric fan to rotate when the temperature of the wireless charging mainboard measured by the temperature measuring device is greater than a temperature threshold; and to control the electric fan not to rotate when the temperature of the wireless charging mainboard is less than or equal to the temperature threshold.

[0009] In a possible implementation, the temperature measuring device is a thermistor, and the thermistor is attached to a printed circuit board of the wireless charging mainboard.

[0010] In a possible implementation, a first end of the thermistor is connected to the power supply via a pull-up resistor, and a second end of the thermistor is grounded; and the first end of the thermistor is connected to a sampling pin of the controller.

[0011] In a possible implementation, the controller is a microprocessor, the microprocessor has a built-in analog-to-digital converter, and the first end of the thermistor is connected to the analog-to-digital converter.

[0012] A possible implementation method further includes: a capacitor;

[0013] The capacitor is connected in parallel across the thermistor.

[0014] A possible implementation manner further includes: a charging shell; the wireless charging mainboard, the electric fan and the temperature measuring device are all located inside the charging shell;

[0015] The front of the charging shell is used to place the wireless charging terminal device, and the side of the charging shell is provided with heat dissipation holes and air ducts.

[0016] In a possible implementation, the temperature threshold value ranges from 10 degrees to 20 degrees.

[0017] In a possible implementation, the electric fan includes a bearing and a shaft core;

[0018] The bearing sleeve is arranged on the shaft core, and lubricating grease is arranged at the junction of the bearing and the shaft core.

[0019] In a possible implementation, the thermistor is a positive temperature coefficient thermistor or a negative temperature coefficient thermistor.

[0020] The present application also provides a car, comprising the above-described on-vehicle wireless charger, and further comprising: a battery;

[0021] The storage battery supplies power to the vehicle-mounted wireless charger.

[0022] It can be seen that this application has the following beneficial effects:

[0023] This application sets a temperature threshold at which the wireless charging terminal device needs to dissipate heat. When the wireless charging terminal device does not need to dissipate heat, the fan does not work. The fan only works when the wireless charging terminal device needs to dissipate heat. It can be seen that this application rationalizes the use scenario of the fan when the wireless charging terminal device is charging, thereby reducing the consumption of lubricating grease in the fan and avoiding abnormal noise during the operation of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a vehicle-mounted wireless charger provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of a wireless charging motherboard provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of an electric fan provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of a temperature measuring device provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of a charging housing provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of a car provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] See also Figure 1 , which is a schematic diagram of a vehicle-mounted wireless charger provided in an embodiment of the present application.

[0032] The vehicle-mounted wireless charger provided in the embodiment of the present application is applied to a car, and can use the power supply in the car to wirelessly charge the wireless charging terminal device. The type of wireless terminal device is not specifically limited, for example, it can be an electronic device such as a mobile phone, a watch or a headset.

[0033] The in-vehicle wireless charger provided in the embodiment of the present application includes: a wireless charging mainboard 100, an electric fan 200 and a temperature measuring device 300.

[0034] The following is combined with Figure 1 A specific implementation form of a vehicle-mounted wireless charger provided in an embodiment of the present application is introduced.

[0035] The temperature measuring device 300 is disposed on the wireless charging mainboard 100. Specifically, the temperature measuring device 300 can be connected to the internal power node A on the wireless charging mainboard 100 and the sampling pin C of the controller on the wireless charging mainboard 100. The electric fan 200 is connected to the internal power node A on the wireless charging mainboard 100 and the output pin B of the controller. It should be understood that the present application does not specifically limit the electric fan 200 and the temperature measuring device 300 to use the same power supply. This embodiment is only introduced in the case of using the same power supply.

[0036] The embodiment of the present application does not specifically limit the implementation method of the wireless charging motherboard 100. For example, the wireless charging motherboard 100 generally includes a wireless charging transmitter, which is used to transmit electrical energy in a wireless form to wirelessly charge the wireless charging terminal device. The wireless charging transmitter generally includes a power conversion circuit and a transmitting coil. The wireless charging transmitter generates heat during operation, so an electric fan is required to dissipate heat to prevent the wireless charging terminal device from overheating and performing thermal protection, causing charging to terminate.

[0037] When the temperature measuring device 300 detects that the temperature of the wireless charging mainboard 100 is greater than the temperature threshold, the electric fan 200 is controlled to rotate; when the temperature of the wireless charging mainboard 100 is less than or equal to the temperature threshold, the electric fan 200 does not rotate, that is, the electric fan 200 does not need to work at low temperatures and does not need to dissipate heat.

[0038] The vehicle-mounted wireless charger in the embodiment of the present application has added a temperature measuring device, which can detect the temperature of the vehicle-mounted wireless charger and the wireless charging terminal device in real time, prevent overheating and trigger the high temperature protection of the wireless charging terminal device, greatly improving the safety of vehicle-mounted wireless charging. When the ambient temperature is lower than the temperature threshold, it will not affect the charging process of the wireless charging terminal device. If there is no temperature measuring device, the electric fan will continue to work when it does not need to dissipate heat, which aggravates the consumption of lubricating grease in the electric fan and easily causes the electric fan to produce abnormal noise when it rotates. At the same time, when the ambient temperature is lower than the temperature threshold, there is a risk of solidification of lubricating grease, and the electric fan is more likely to produce abnormal noise when it is working. After adding the temperature measuring device, the electric fan will only be started for heat dissipation when the temperature measuring device detects that the temperature is greater than a certain threshold, thereby cooling the wireless charging mainboard, so that the activation of the electric fan can be dynamically and timely adjusted, reducing the consumption of lubricating grease, and reducing the possibility of abnormal noise when the electric fan is running, thereby improving the user's satisfaction with the vehicle-mounted wireless charger. In addition, the dynamic adjustment activation of the electric fan avoids unnecessary power consumption, thereby extending the service life of the electric fan.

[0039] See also Figure 2 , which is a schematic diagram of a wireless charging mainboard in a vehicle-mounted wireless charger provided in an embodiment of the present application.

[0040] The wireless charging mainboard provided in the embodiment of the present application includes: a controller 201 and a power supply 202 .

[0041] The first end of the controller 201 is connected to the first end of the power supply 202. The second end of the controller 201 is connected to the node B of the wireless charging mainboard. The third end of the controller 201 is connected to the node C of the wireless charging mainboard. The second end of the power supply 202 is connected to the node A of the wireless charging mainboard. It should be understood that the present embodiment does not specifically limit the models of the controller 201 and the power supply 202. The controller 201 may be a microprocessor MCU or a single-chip microcomputer, etc., and the power supply 202 may be any power supply of a model that meets the working voltage of the vehicle-mounted wireless charger.

[0042] The controller 201 can control the speed of the electric fan by sending a driving signal to the electric fan. It should be understood that the controller belongs to mature technology, and sending a control signal to drive the electric fan to work after detecting that the temperature is higher than the threshold value belongs to the prior art, which is not specifically introduced in this application. The driving signal can be a pulse width modulation signal, and the speed of the electric fan is changed by controlling the duty cycle of the driving signal. The specific electric fan working strategy is shown in Table 1 below.

[0043] Table 1- Fan operation strategy

[0044]

[0045] In this embodiment, the controller sends drive signals with different duty cycles to control the electric fan to dissipate heat for the wireless charging terminal device at corresponding rotation speeds at different vehicle speeds, thereby ensuring the heat dissipation effect while avoiding unnecessary power consumption of the electric fan and improving the working efficiency of the electric fan.

[0046] See also Figure 3 , which is a schematic diagram of an electric fan in a vehicle wireless charger provided in an embodiment of the present application.

[0047] The electric fan provided in the embodiment of the present application includes: a bearing 301 and a shaft core 302 .

[0048] The bearing 301 is sleeved on the shaft 302. It should be understood that the present embodiment does not specifically limit the types of the bearing 301 and the shaft core 302. Lubricating grease is provided at the intersection of the bearing 301 and the shaft core 302 to reduce abnormal noise generated when the fan rotates.

[0049] The combination of the bearing and the shaft core in this embodiment ensures that the electric fan works stably. The lubricating grease between the bearing and the shaft core reduces the abnormal noise generated when the electric fan rotates, thereby improving the user's satisfaction with the car wireless charger.

[0050] See also Figure 4 , which is a schematic diagram of a temperature measuring device in a vehicle-mounted wireless charger provided in an embodiment of the present application.

[0051] The temperature measuring device provided in the embodiment of the present application includes: a capacitor C1, a pull-up resistor R1 and a thermistor R2. C1 is connected in parallel to both ends of R2. The first end of R2 is connected to the internal power supply node B on the wireless charging board through R3, and the first end of R2 is connected to the sampling pin node C of the controller on the wireless charging board. The second end of R2 is grounded. It should be understood that this embodiment does not limit the properties of the thermistor R2, for example, the thermistor is a positive temperature coefficient thermistor or a negative temperature coefficient thermistor.

[0052] When the temperature of the wireless charging pad rises, the resistance of R2 will change accordingly. Since R1 and R2 share the power supply voltage, when the resistance of R2 changes, the ratio of R1 to R2 also changes, and the potential of node C will also change. Therefore, each temperature corresponds to a potential value, thereby achieving the temperature detection function.

[0053] In this embodiment, a thermistor is used as a temperature detection device. Since the thermistor is very sensitive to temperature changes, it can detect small temperature changes, thereby improving the accuracy of the temperature measuring device. At the same time, the resistance value of the thermistor changes relatively stably within a certain temperature range, thereby improving the stability of the temperature measuring device.

[0054] See also Figure 5 , which is a schematic diagram of an external charging shell of a vehicle-mounted wireless charger provided in an embodiment of the present application.

[0055] The charging housing provided in the embodiment of the present application includes: a wireless charging mainboard 501 , an electric fan 502 , a temperature measuring device 503 , and heat dissipation holes and air ducts 504 .

[0056] The wireless charging mainboard 501, the electric fan 502 and the temperature measuring device 503 are all located inside the charging shell, and the side of the charging shell is provided with heat dissipation holes and air ducts 504.

[0057] In this embodiment, the outside of the charging shell is used to place the device to be charged, which protects the safety of the wireless charging mainboard, electric fan and temperature measuring device inside the charging shell. At the same time, the heat dissipation holes and air ducts on the side further enhance the heat dissipation capacity of the electric fan, thereby improving the overall safety of the vehicle-mounted wireless charger.

[0058] See also Figure 6 , which is a schematic diagram of a car provided in an embodiment of the present application.

[0059] The car includes an on-board wireless charger 601 and a battery 602. The battery 602 provides power for the on-board wireless charger 602.

[0060] In this embodiment, the car uses a battery, which improves the stability of the car wireless charger.

[0061] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0062] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. 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 application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle-mounted wireless charger, characterized in that: include: Wireless charging motherboard, electric fan and temperature measuring device; The temperature measuring device is arranged on the wireless charging mainboard, and the temperature measuring device is connected to the controller on the wireless charging mainboard; The electric fan is connected to the controller and the power supply on the wireless charging mainboard; The controller is used to control the electric fan to rotate when the temperature of the wireless charging mainboard measured by the temperature measuring device is greater than a temperature threshold; When the temperature of the wireless charging mainboard is less than or equal to the temperature threshold, the electric fan is controlled not to rotate.

2. The vehicle-mounted wireless charger according to claim 1, characterized in that: The temperature measuring device is a thermistor, and the thermistor is attached to the printed circuit board of the wireless charging mainboard.

3. The vehicle-mounted wireless charger according to claim 2, characterized in that: The first end of the thermistor is connected to the power supply through a pull-up resistor, and the second end of the thermistor is grounded; the first end of the thermistor is connected to the sampling pin of the controller.

4. The vehicle-mounted wireless charger according to claim 3, characterized in that: The controller is a microprocessor, the microprocessor has an analog-to-digital converter, and the first end of the thermistor is connected to the analog-to-digital converter.

5. The vehicle-mounted wireless charger according to claim 4, characterized in that: Also includes: capacitance; The capacitor is connected in parallel across the thermistor.

6. The vehicle-mounted wireless charger according to any one of claims 1 to 5, characterized in that: Also included: a charging housing; The wireless charging mainboard, the electric fan and the temperature measuring device are all located inside the charging housing; The front of the charging shell is used to place the wireless charging terminal device, and the side of the charging shell is provided with heat dissipation holes and air ducts.

7. The vehicle-mounted wireless charger according to any one of claims 1 to 5, characterized in that: The temperature threshold value ranges from 10 degrees to 20 degrees.

8. The vehicle-mounted wireless charger according to any one of claims 1 to 5, characterized in that: The electric fan comprises a bearing and a shaft core; The bearing sleeve is arranged on the shaft core, and lubricating grease is arranged at the junction of the bearing and the shaft core.

9. The vehicle-mounted wireless charger according to any one of claims 2 to 5, characterized in that: The thermistor is a positive temperature coefficient thermistor or a negative temperature coefficient thermistor.

10. An automobile, characterized in that: The vehicle-mounted wireless charger according to any one of claims 1 to 9 further comprises: a battery; The storage battery supplies power to the vehicle-mounted wireless charger.

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