A wireless charging detection circuit and a vehicle-mounted wireless charger detection device

Abstract

The wireless charging detection circuit and vehicle-mounted wireless charger detection device provided in this application are used to detect the charging function of a wireless charger. The wireless charging detection circuit includes: a coil, a rectifier module, a switching element, a power interface, and a prompting element. The coil is connected to the rectifier module and is used to generate induced alternating current when receiving magnetic field signals emitted by the wireless charger. The output terminal of the rectifier module is connected to the input terminal of the switching element. The rectifier module is used to convert the received induced alternating current into direct current and output it to the switching element. The switching element is used to connect the output terminal of the rectifier module to the power interface. The switching element is used to select whether the direct current output is to the prompting element or the power interface. The wireless charging function of the wireless charger can be detected and fed back according to the prompting element. The wireless charging function of the wireless charger can also be detected through the power interface, or the device connected to the power interface can be charged. It is not limited by the model of the car being tested, and has high versatility, high flexibility, and low component cost.

Description

Technical Field

[0001] This application relates to a wireless charger testing tool, and more particularly to a wireless charging testing circuit and an in-vehicle wireless charger testing device. Background Technology

[0002] More and more cars are now equipped with wireless charging. During vehicle production, this function needs to be inspected before leaving the factory. However, the quality of wireless charging devices on the market varies greatly, and it is difficult to achieve reliable and standardized measurements using commercially available wireless charging devices. Professional testing tools are required.

[0003] In conceiving and implementing this application, the inventors discovered at least the following problems: Existing professional testing tools are easily limited by the model of the vehicle being tested, resulting in low versatility. Therefore, professional testing tools need to be customized according to the vehicle model being tested, leading to low flexibility and high usage costs.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0005] This application provides a wireless charging detection circuit that is not limited by the model of the car being tested, and has high versatility, high flexibility and low component cost.

[0006] This application provides a wireless charging detection circuit for detecting the charging function of a wireless charger. The wireless charging detection circuit includes: a coil, a rectifier module, a switching element, a power interface, and a prompting element. The coil is connected to the input terminal of the rectifier module and is used to generate induced alternating current when it receives a magnetic field signal emitted by the wireless charger. The output terminal of the rectifier module is connected to the input terminal of the switching element. The rectifier module is used to convert the received induced alternating current into direct current and output it to the switching element. The first output terminal of the switching element is connected to the input terminal of the prompting element, and the second output terminal of the switching element is connected to the input terminal of the power interface. When the input terminal of the switching element is connected to the first output terminal, the switching element connects the output terminal of the rectifier module to the prompting element. When the input terminal of the switching element is connected to the second output terminal, the switching element connects the output terminal of the rectifier module to the power interface.

[0007] Optionally, the switching element is a single-pole double-throw switch, which includes a common terminal, a normally closed terminal, and a normally open terminal. The common terminal serves as the input terminal of the switching element and is connected to the output terminal of the rectifier module. The normally closed terminal serves as the first output terminal of the switching element and is connected to the input terminal of the indicator element. The normally open terminal serves as the second output terminal of the switching element and is connected to the input terminal of the power interface.

[0008] Optionally, the wireless charging detection circuit also includes a current-limiting resistor located between the first output terminal of the switching element and the indication element.

[0009] Optionally, the indicator element is a light-emitting diode (LED), with the positive terminal of the LED connected to the first output terminal of the switching element and the negative terminal of the LED connected to the ground terminal of the power interface.

[0010] Optionally, the wireless charging detection circuit also includes a two-pole quick-connect terminal, through which a light-emitting diode is connected to the wireless charging detection circuit.

[0011] Optionally, the power interface is used to connect to an external smart device. When the input terminal of the switching element is connected to the second output terminal, the DC power output from the output terminal of the rectifier module is transmitted to the power interface through the switching element to provide charging current for the external smart device.

[0012] Optionally, the external smart device includes a power detection module, which is used to detect the power of the charging current provided by the wireless charging detection circuit.

[0013] Optionally, the power interface is a Universal Serial Bus (USB) interface.

[0014] Optionally, the wireless charger is an in-vehicle wireless charging pad, which converts the high-voltage DC power supplied by the vehicle's battery into AC power and then emits a magnetic field signal.

[0015] This application also provides an in-vehicle wireless charger detection device, including the wireless charging detection circuit described above.

[0016] The wireless charging detection circuit provided in this application is used to detect the charging function of a wireless charger. The wireless charging detection circuit includes: a coil, a rectifier module, a switching element, a power interface, and a prompting element. The coil is connected to the rectifier module and is used to generate induced alternating current when receiving a magnetic field signal emitted by the wireless charger. The output terminal of the rectifier module is connected to the input terminal of the switching element. The rectifier module is used to convert the received induced alternating current into direct current and output it to the switching element. The switching element is used to connect the output terminal of the rectifier module to the power interface, which is connected to an external smart device. The switching element is used to select whether to output direct current to the prompting element or the power interface. The wireless charging function of the wireless charger can be detected and fed back according to the prompting element. The wireless charging function of the wireless charger can also be detected through the power interface, or the device connected to the power interface can be charged. It has high flexibility and low component cost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the circuit structure of a wireless charging detection circuit according to an embodiment of this application; Figure 2 This is a schematic diagram showing the connection between the wireless charging detection circuit of this application and an external smart device; Figure 3 This is a schematic diagram of the circuit structure of a wireless charging detection circuit according to another embodiment of this application.

[0019] Among them, 110-coil, 120-rectifier module, 130-switching element, 140-power interface, 150-indication element, 160-current limiting resistor, 170-two-pole quick-connect terminal, 200-external intelligent device, 210-power detection module, 300-self-test circuit, 310-self-test switch, and 320-self-test power supply.

[0020] The realization of the objectives, functional features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0021] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0022] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Optionally, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which needs to be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0023] It should be understood that the embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0024] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the circuit structure of a wireless charging detection circuit according to an embodiment of this application. Figure 1 As shown, coil 110 is connected to the input terminal of rectifier module 120, generating induced alternating current when it receives a magnetic field signal from the wireless charger. The output terminal of rectifier module 120 is connected to the input terminal of switching element 130. Rectifier module 120 converts the received induced alternating current into direct current and outputs it to switching element 130. The first output terminal of switching element 130 is connected to the input terminal of indicator element 150, and the second output terminal of switching element 130 is connected to the input terminal of power interface 140. When the input terminal of switching element 130 is connected to the first output terminal, switching element 130 connects the output terminal of rectifier module 120 to indicator element 150; when the input terminal of switching element 130 is connected to the second output terminal, switching element 130 connects the output terminal of rectifier module 120 to power interface 140.

[0025] In one embodiment, the switching element 130 can be a single-pole double-throw switch, which includes a common terminal, a normally closed terminal, and a normally open terminal. The common terminal serves as the input terminal of the switching element 130 and is connected to the output terminal of the rectifier module 120. The normally closed terminal serves as the first output terminal of the switching element 130 and is connected to the input terminal of the indicator element 150. The normally open terminal serves as the second output terminal of the switching element 130 and is connected to the input terminal of the power interface 140. In other embodiments, the switching element 130 can be implemented using other types of switching devices.

[0026] In one embodiment, the wireless charging detection circuit further includes a current-limiting resistor 160, which is located between the first output terminal of the switching element 130 and the prompting element 150. To prevent excessive DC current, the current-limiting resistor 160 is made to ensure that the current of the prompting element 150 is below its safety threshold. The resistance value of the current-limiting resistor 160 can be selected according to the actual situation. In one embodiment, the prompting element 150 is a light-emitting diode (LED). The positive terminal of the LED is connected to the first output terminal of the switching element 130, and the negative terminal of the LED is connected to the ground terminal of the power interface 140. When the input terminal and the first output terminal of the switching element 130 are connected, the switching element 130 connects the output terminal of the rectifier module 120 to the LED. If the LED emits light, the prompting coil 110 receives the magnetic field signal emitted by the wireless charger and generates induced alternating current. This induced alternating current is converted into direct current by the rectifier module 120 and then output to the LED through the connected switching element 130, indicating that the wireless charging function of the wireless charger is normal. In other embodiments, the prompting element 150 can also be a buzzer or other device with a prompting function.

[0027] In one embodiment, the wireless charging detection circuit further includes a two-pole quick-release terminal 170. The two-pole quick-release terminal includes two quick-release conductive contacts, a spring latch, and a limiting shell. The indicator element 150 is connected to the wireless charging detection circuit through the quick-release spring latch. Manually pressing and lifting the spring latch can quickly pull out or insert the indicator element 150, so as to facilitate the replacement and maintenance of the vulnerable indicator element 150.

[0028] In one embodiment, the wireless charger is an in-vehicle wireless charging board, which converts the high-voltage direct current supplied by the vehicle's battery into alternating current and then emits a magnetic field signal.

[0029] In one embodiment, the coil 110 is placed in the wireless charging pad transmitting area of ​​the wireless charger. If the wireless charger's transmitting function is complete, the coil 110 can receive the magnetic field signal emitted by the wireless charger and generate induced alternating current, which is then converted into direct current by the rectifier module 120. At this time, if the switching element 130 selects the first output terminal to be turned on, the direct current output by the rectifier module 120 is transmitted to the prompting element 150 through the current limiting resistor 160, and the prompting element 150 is powered on to enable the prompting function (i.e., the light-emitting diode lights up). If the wireless charger's transmitting function is defective, the coil 100 cannot receive the magnetic field signal emitted by the wireless charger, and the prompting element 150 cannot be powered on to enable it.

[0030] Figure 2 This is a schematic diagram showing the connection between the wireless charging detection circuit of this application and an external smart device. Please refer to... Figure 2 The power interface 140 is connected to the external smart device 200.

[0031] In one embodiment, the coil 110 is placed in the wireless charging pad transmitting area of ​​the wireless charger. If the wireless charger's transmitting function is complete, the coil 110 can receive the magnetic field signal emitted by the wireless charger. When the input terminal of the switching element 130 is connected to the second output terminal, the DC power output by the output terminal of the rectifier module 120 is transmitted to the power interface 140 through the switching element 130 to provide charging current for external smart devices.

[0032] In one embodiment, the power of the charging current provided by the wireless charging detection circuit can also be detected by the power detection module 210 of the external smart device 200.

[0033] In one embodiment, the output power of the rectifier module 120 is preferably 10 watts, and the power interface 140 is a USB interface. In other embodiments, the power interface 140 may be a hardware interface other than a USB interface that has DC power supply capability.

[0034] Since the indicator element 150 is typically a fragile component, it should be checked before using the wireless charging detection circuit to test the wireless charging function of the wireless charger. This is to prevent a damaged indicator element 150 from interfering with the test results. Please refer to [link / reference needed]. Figure 3 , Figure 3 This is a schematic diagram of the circuit structure of a wireless charging detection circuit according to another embodiment of this application. The wireless charging detection circuit may further include a self-test circuit 300. The self-test circuit includes a self-test switch 310 and a self-test power supply 320. Specifically, the self-test switch 310 may be a push-button switch, and the self-test power supply 320 may be a battery pack.

[0035] In one embodiment, when the self-test circuit 300 is used to self-test the wireless charging detection circuit, the input terminal of the switching element 130 is connected to the first output terminal, and the self-test switch 310 is closed and conducting. The self-test power supply 320 can provide DC power to the current limiting resistor 160 and the prompting element 150 through the switching element 130. If the prompting element 150 is energized and outputs a prompt signal, it indicates that the prompting element 150 is intact. If the prompting element 150 does not output a prompt signal, it is determined that the prompting element 150 is abnormal.

[0036] This application also provides an in-vehicle wireless charger detection device, including the wireless charging detection circuit described above.

[0037] The wireless charging detection circuit provided in this application is used to detect the charging function of an in-vehicle wireless charger. The coil is connected to the rectifier module to generate induced AC current when receiving the magnetic field signal emitted by the wireless charger. The rectifier module converts the received induced AC current into DC current and outputs it to the switching element. The switching element is used to connect the output terminal of the rectifier module to the prompting element or the power interface. The wireless charging detection circuit can be connected to an external smart device through the power interface. It can also generate induced AC current through the coil and the rectifier module according to the feedback of the wireless charger function from the prompting element or the external smart device. It is not limited by the model of the car being tested, and has high versatility, high flexibility and low component cost.

[0038] In addition, this application may also include, but is not limited to, a self-testing circuit for detecting vulnerable components, i.e., indicator components, to avoid interference from vulnerable components during testing, and to ensure good stability.

[0039] It is understood that the above scenarios are merely examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of this application. The technical solutions of this application can also be applied to other scenarios. For example, as those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0040] The units in the device of this application embodiment can be merged, divided, and deleted according to actual needs.

[0041] In this application, the same or similar terms, concepts, technical solutions and / or application scenario descriptions are generally described in detail only when they appear for the first time. When they appear again, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of this application, the same or similar terms, concepts, technical solutions and / or application scenario descriptions that are not described in detail later can be referred to their previous relevant detailed descriptions.

[0042] The technical features of the present application can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0043] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A wireless charging detection circuit for detecting a charging function of a wireless charger, the wireless charging detection circuit comprising: a wireless charging detection circuit configured to detect a wireless charging function of a wireless charger; and a wireless charging detection circuit configured to detect a wireless charging function of a wireless charger. The wireless charging detection circuit includes: a coil, a rectifier module, a switching element, a power interface, and a prompting element; The coil is connected to the input terminal of the rectifier module and is used to generate induced alternating current when it receives the magnetic field signal emitted by the wireless charger. The output terminal of the rectifier module is connected to the input terminal of the switching element. The rectifier module is used to convert the received induced AC power into DC power and then output it to the switching element. The first output terminal of the switching element is connected to the input terminal of the prompting element, and the second output terminal of the switching element is connected to the input terminal of the power interface. When the input terminal of the switching element is connected to the first output terminal, the switching element is used to connect the output terminal of the rectifier module to the prompting element. When the input terminal of the switching element is connected to the second output terminal, the switching element is used to connect the output terminal of the rectifier module to the power interface.

2. The wireless charging detection circuit of claim 1, wherein, The switching element is a single-pole double-throw switch, which includes a common terminal, a normally closed terminal, and a normally open terminal. The common terminal serves as the input terminal of the switching element and is connected to the output terminal of the rectifier module. The normally closed terminal serves as the first output terminal of the switching element and is connected to the input terminal of the indicator element. The normally open terminal serves as the second output terminal of the switching element and is connected to the input terminal of the power interface.

3. The wireless charging detection circuit of claim 1, wherein, The wireless charging detection circuit also includes a current-limiting resistor, which is located between the first output terminal of the switching element and the indication element.

4. The wireless charging detection circuit as described in claim 1, characterized in that, The indicator element is a light-emitting diode (LED). The positive terminal of the LED is connected to the first output terminal of the switching element, and the negative terminal of the LED is connected to the ground terminal of the power interface.

5. The wireless charging detection circuit of claim 4, wherein, The wireless charging detection circuit also includes a two-pole quick-connect terminal, through which the light-emitting diode is connected to the wireless charging detection circuit.

6. The wireless charging detection circuit of claim 1, wherein, The power interface is used to connect to an external smart device. When the input terminal of the switching element is connected to the second output terminal, the DC power output by the output terminal of the rectifier module is transmitted to the power interface through the switching element to provide charging current for the external smart device.

7. The wireless charging detection circuit of claim 6, wherein, The external smart device includes a power detection module, which is used to detect the power of the charging current provided by the wireless charging detection circuit.

8. The wireless charging detection circuit of claim 1, wherein, The power interface is a universal serial bus interface.

9. The wireless charging detection circuit of claim 1, wherein, The wireless charger is an in-vehicle wireless charging board, which converts the high-voltage DC power supplied by the vehicle's battery into AC power and then emits the magnetic field signal.

10. A vehicle-mounted wireless charger detection device, comprising a wireless charging detection circuit as described in any one of claims 1 to 9, wherein the wireless charging detection circuit is used to detect the wireless charging function of the vehicle-mounted wireless charger.

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