Device and corresponding method for detecting wireless charging equipment

Abstract

The present invention relates to a device for detecting wireless charging equipment and a corresponding method, wherein the device adopts a separated main control module and a wireless charging power receiving module, can effectively realize the detection of wireless charging equipment, has the characteristics of high temperature resistance and high voltage resistance, and has a long service life. The main control module in the device controls the device during the detection process, and can more conveniently perform fault analysis on faults occurring during the inspection process. The device for detecting wireless charging equipment and the corresponding method of the present invention have the characteristics of easy operation, high reliability, and long service life, and can well inspect wireless charging equipment.

Description

Technical Field

[0001] The present invention relates to the field of circuit technology, in particular to the field of wireless charging, and specifically to a device and a corresponding method for detecting a wireless charging device. Background Art

[0002] Wireless charging is a new charging technology that has developed in recent years, and the Qi standard is a standard for wireless charging. After the iPhone and Samsung series mobile phones came with wireless charging functions in 2017, the market for Qi standard wireless charging devices has really grown significantly, and the world's major Qi standard wireless charging equipment production sites are also concentrated in China, because this is a new charging technology.

[0003] Aging tests are required in the production of electronic products, and Qi standard wireless charging devices are no exception. However, since Qi standard wireless charging devices are a new type of wireless charging method, they are different from previous wired charging devices. Wired charging devices can use digital power supplies, electronic loads and other instruments to directly carry out aging tests, while wireless charging devices cannot carry out aging tests directly. They require a wireless charging receiver to perform communication handshake matching, and then the wireless charging receiver carries out loading to achieve the functions of functional testing, load capacity and aging testing of wireless charging devices. However, the functional and aging test devices, methods and standards for Qi standard wireless charging devices are still mixed.

[0004] In the prior art, wireless charging devices for Qi standard mainly use receiving modules made of wireless charging receiving single chips from TI, IDT and other companies for function and aging tests. This receiving module made of a wireless charging receiving single chip is itself a wireless charging receiver. During the long-term high-power load aging process, the chip will generate a lot of heat. Since this single chip is a wireless charging and receiving integrated SOC (SOC: system-on-chip, also known as system on chip, is an integrated circuit with a dedicated purpose), affected by the process and chip area, its voltage and high temperature resistance characteristics cannot meet the requirements of the test device, and the receiving module is easily damaged.

[0005] When using this wireless charging receiving single chip to make a receiving module for wireless charging equipment function and aging testing, it is generally necessary to check whether the system is charging normally after the experiment is completed. This test method cannot monitor the interruption causes, interruption times and coil temperature rise data encountered during the test. Summary of the invention

[0006] The purpose of the present invention is to overcome at least one of the above-mentioned shortcomings of the prior art and provide a device and a corresponding method for wireless charging equipment detection that can monitor the interruption causes, interruption times and coil temperature rise data that occur during the test process and has a long service life.

[0007] In order to achieve the above purpose or other purposes, the device and corresponding method for detecting wireless charging equipment of the present invention are as follows:

[0008] The main feature of the device for detecting wireless charging equipment is that the device comprises:

[0009] A wireless charging power receiving module, comprising a receiving coil, for receiving power during the detection process and converting the voltage received by the receiving coil into a rectified voltage;

[0010] A main control module, used to perform timing control on the wireless charging power receiving module during the detection process, and to control the working state of the device during the detection process;

[0011] The main control module and the wireless charging power receiving module are separate structures.

[0012] Preferably, the main control module and the wireless charging power receiving module are connected via a communication circuit module; and the communication circuit module is a Qi standard communication module.

[0013] More preferably, the communication circuit module includes a first MOS transistor, a second MOS transistor, a first capacitor, a second capacitor and a first resistor;

[0014] The drain of the first MOS tube is connected to the first end of the first capacitor, and the source of the first MOS tube is grounded;

[0015] The drain of the second MOS tube is connected to the first end of the second capacitor, and the source of the second MOS tube is grounded;

[0016] The gate of the first MOS tube and the gate of the second MOS tube are both connected to the first end of the first resistor, and the second end of the first resistor is grounded;

[0017] The communication circuit module is connected to the wireless charging power receiving module through the second end of the first capacitor and the second end of the second capacitor;

[0018] The communication circuit module is connected to the main control module via the first end of the first resistor.

[0019] Furthermore, the wireless charging power receiving module is an LC semi-synchronous rectification module;

[0020] Wherein, the LC semi-synchronous rectification module includes a first capacitor group unit, a second capacitor group unit, a third capacitor group unit, a third MOS tube, a fourth MOS tube, a voltage regulator diode, a first diode and a second diode;

[0021] The drain of the third MOS tube is respectively connected to the gate of the fourth MOS tube, the first end of the first capacitor group unit, the first end of the second capacitor group unit and the anode of the first diode;

[0022] The second end of the first capacitor group unit is connected to the first end of the receiving coil;

[0023] The drain of the fourth MOS tube is respectively connected to the gate of the third MOS tube, the second end of the second capacitor group unit, the second end of the receiving coil and the anode of the second diode;

[0024] The source of the third MOS tube and the source of the fourth MOS tube are both grounded;

[0025] The first end of the third capacitor group unit is simultaneously connected to the cathode of the first diode, the cathode of the second diode and the cathode of the voltage regulator diode;

[0026] The second end of the third capacitor group unit is connected to the anode of the voltage stabilizing diode;

[0027] The anode of the voltage stabilizing diode is grounded, and the cathode of the voltage stabilizing diode outputs the rectified voltage;

[0028] The first end of the second capacitor group unit is connected to the second end of the first capacitor in the communication circuit module, and the second end of the second capacitor group unit is connected to the second end of the second capacitor in the communication circuit module.

[0029] Furthermore, the first capacitor group unit includes a third capacitor, a fourth capacitor and a fifth capacitor, the first end of the third capacitor, the first end of the fourth capacitor and the first end of the fifth capacitor together constitute the first end of the first capacitor group unit, and the second end of the third capacitor, the second end of the fourth capacitor and the second end of the fifth capacitor together constitute the second end of the first capacitor group unit;

[0030] The second capacitor group unit includes a sixth capacitor and a seventh capacitor, the first end of the sixth capacitor and the first end of the seventh capacitor together constitute the first end of the second capacitor group unit, and the second end of the sixth capacitor and the second end of the seventh capacitor together constitute the second end of the second capacitor group unit;

[0031] The third capacitor group unit includes an eighth capacitor, a ninth capacitor and a tenth capacitor. The first end of the eighth capacitor, the first end of the ninth capacitor and the first end of the tenth capacitor together constitute the first end of the third capacitor group unit, and the second end of the eighth capacitor, the second end of the ninth capacitor and the second end of the tenth capacitor together constitute the second end of the third capacitor group unit.

[0032] Preferably, the device further comprises:

[0033] A low voltage difference linear output control module is connected to the wireless charging power receiving module and the main control module respectively, and the main control module controls the low voltage difference linear output control module to convert the rectified voltage into a fixed output voltage;

[0034] The load switching control module is connected to the main control module and the low voltage difference linear output control module.

[0035] More preferably, the low voltage difference linear output control module includes a comparator, a fifth MOS tube M5, a second resistor, a third resistor, an eleventh capacitor and a voltage feedback unit;

[0036] The inverting input terminal of the comparator is connected to the main control module through the third resistor R3, the main control module sends an adjustment control signal to the inverting input terminal of the comparator, and the inverting input terminal of the comparator is grounded through the eleventh capacitor;

[0037] The comparator output terminal is connected to the gate of the fifth MOS tube;

[0038] The source end of the fifth MOS tube is directly connected to the rectified voltage, and the gate of the fifth MOS tube is connected to the rectified voltage through the second resistor;

[0039] The drain end of the fifth MOS tube is connected to the first end of the voltage feedback unit, the fixed output voltage is outputted by the first end of the voltage feedback unit, the second end of the voltage feedback unit is connected to the non-inverting input end of the comparator, and the third end of the voltage feedback unit is grounded;

[0040] The voltage feedback unit includes a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fourth resistor and a fifth resistor;

[0041] The first end of the twelfth capacitor, the first end of the thirteenth capacitor, the first end of the fourteenth capacitor and the first end of the fourth resistor together constitute the first end of the voltage feedback unit;

[0042] The second end of the fourth resistor is connected to the first end of the fifth resistor;

[0043] The second end of the twelfth capacitor is connected to the connection point of the fourth resistor and the fifth resistor; the second end of the twelfth capacitor constitutes the second end of the voltage feedback unit;

[0044] The second end of the fifth resistor, the second end of the twelfth capacitor, and the second end of the thirteenth capacitor together constitute the third end of the voltage feedback unit.

[0045] More preferably, the device further comprises:

[0046] The temperature sensor module is used to regularly collect the temperature of the device and the environment, and feed back the collected temperature information of the device and the environment to the main control module, so that the device can monitor the temperature rise data during the detection process;

[0047] A digital-to-analog converter voltage and current acquisition module is respectively connected to the wireless charging power receiving module, the low voltage difference linear output control module and the main control module, and is used to enable the device to monitor the voltage and current data of each point in the device during the detection process;

[0048] A data recording module, connected to the main control module, for recording data during the detection process;

[0049] A data display module, connected to the main control module, for displaying the data in the detection process;

[0050] The data transmission module is connected to the main control module and is used to transmit the data in the detection process to an external device.

[0051] Furthermore, the temperature of the device includes the temperature of a PCBA board used to carry all components in the device and the temperature of the receiving coil.

[0052] Preferably, the device further comprises a power generation module for providing a voltage source for the main control module;

[0053] The power generation module is a dual-redundancy power supply control circuit module, which includes an external input power supply unit and a rectified voltage generating power supply unit. Both the external input power supply unit and the rectified voltage generating power supply unit are connected to the main control module, and the rectified voltage generating power supply unit is also connected to the wireless charging power receiving module.

[0054] Preferably, the main control module is composed of a micro control unit, and the micro control unit is composed of an STM32 chip.

[0055] The method for detecting a wireless charging device based on the above device is mainly characterized in that the device includes a temperature sensor module and a digital-to-analog converter voltage and current acquisition module, and the method includes:

[0056] (1) The main control module performs timing control on the wireless charging power receiving module to control the wireless charging power receiving module to implement the power receiving operation;

[0057] (2) The main control module controls the temperature sensor module to regularly collect the temperature of the device and the environment, so as to obtain the temperature rise data during the test process; the main control module controls the digital-to-analog converter voltage and current acquisition module to measure the voltage and current data of each point in the device during the detection process, so as to obtain the voltage and current data during the test process; the main control module monitors the number of interruptions and the reasons for the interruptions during the test process, so as to obtain the interruption data during the test process.

[0058] Preferably, the main control module monitors the number of interruptions and the reasons for interruptions during the test process, including the following steps:

[0059] (a1) When the wireless charging power receiving module starts to receive power for the first time, the main control module starts to monitor the test process;

[0060] (a2) the main control module monitors whether the wireless charging power receiving module is disconnected during the power receiving process;

[0061] (a3) If the connection is interrupted, proceed to the subsequent step (a4); otherwise, return to the above step (a2) until the test is completed;

[0062] (a4) The main control module records the temperature of the device and the environment corresponding to the interruption process and the voltage and current data of each point in the device, providing a basis for determining the cause of the interruption;

[0063] (a5) The number of interruptions recorded in the main control module is counted by one, and the process returns to the above step (a1).

[0064] Preferably, the device comprises a data display module and a data recording module, and the step (2) further comprises the following steps:

[0065] (3) The data recording module stores the temperature rise data, interruption data, and voltage and current data;

[0066] (4) The main control module transmits the temperature rise data, interruption data, and voltage and current data to the data display module;

[0067] (5) The data display module displays the temperature rise data, interruption data, and voltage and current data.

[0068] More preferably, the device includes a data transmission module, and the step (5) further includes the following steps:

[0069] (6) The data transmission module transmits the temperature rise data, interruption data, and voltage and current data to an external device.

[0070] The device and corresponding method for wireless charging device detection of the present invention can effectively realize the detection of wireless charging devices. Since the main control module and the wireless charging power receiving module are separated structures, the device has the characteristics of high temperature resistance and high voltage resistance, and the device has a long service life. The main control module in the device can collect and record data during the detection process, and can more conveniently perform fault analysis on faults occurring during the inspection process. When a dual-redundancy power supply control circuit module is used as a power supply generation module in the device to provide a voltage source for the main control module, a backup power supply can be provided to the device when one of the power supplies fails, so as to prevent the main control module from losing power and enable the main control module to maintain the ability to record data and transmit data. The device and corresponding method for wireless charging device detection of the present invention have the characteristics of easy operation, high reliability, and long service life, and can well inspect wireless charging devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 It is a module diagram of an apparatus for detecting a wireless charging device in an embodiment of the present invention.

[0072] Figure 2 Schematic diagram of the structure of an LC semi-synchronous rectification module in one embodiment of the present invention.

[0073] Figure 3 FIG. 4 is a schematic diagram of the structure of a communication circuit module in an embodiment of the present invention.

[0074] Figure 4 FIG. 4 is a schematic diagram of the structure of a low voltage difference linear output control module in an embodiment of the present invention. DETAILED DESCRIPTION

[0075] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments.

[0076] like Figure 1As shown, in this embodiment, the device applied to wireless charging device detection includes a wireless charging power receiving module, a main control module, a communication line module, a digital-to-analog converter voltage and current acquisition module, a temperature sensor module, a data display module, a data recording module, a data transmission module, a load switching control module, a low voltage difference linear output control module, an external input power supply unit and a rectifier voltage generating power supply unit. The device applied to wireless charging device detection is connected to an external wireless charging device to be tested through the wireless charging power receiving module. In this embodiment, an LC semi-synchronous rectifier module is used as the wireless charging power receiving module.

[0077] Combine the following Figure 1 to Figure 4 The device for detecting a wireless charging device in the above embodiment is further described. In this embodiment, the device includes a wireless charging power receiving module and a main control module.

[0078] like Figure 2 As shown, the wireless charging power receiving module includes a receiving coil L1. The wireless charging power receiving module is used to receive power during the detection process, and convert the voltage received by the receiving coil into a rectified voltage, and wirelessly transmit power to the wireless charging device to be tested through the receiving coil L1;

[0079] The main control module is used to perform timing control on the wireless charging power receiving module during the detection process, and to control the working state of the device during the detection process. In this embodiment, the main control module is composed of a microcontroller unit (MCU), and the microcontroller unit is composed of an STM32 chip. The main control module is the control core of the device, and in this embodiment, the STM32 chip is used to realize functions such as logic control.

[0080] The main control module and the wireless charging power receiving module are separate structures.

[0081] The device for detecting wireless charging equipment of the present invention is composed of a separate main control module and a wireless charging power receiving module, and is not a SOC (system on chip) structure. The receiving coil L1 is located in the wireless charging power receiving module. This means that during the detection process, the device for detecting wireless charging equipment of the present invention is not restricted by the control chip, can withstand higher voltage and current, and has good high temperature resistance and a longer service life, so that the wireless charging equipment can be better tested for function and aging.

[0082] And in this embodiment, the main control module in the present invention can be combined with the hardware structures such as the temperature sensor module, the digital-to-analog converter voltage circuit acquisition module and the data recording module to realize the data collection and data recording operation during the detection process. The main control module obtains the temperature rise data during the detection process and the voltage and current data of each point in the device for collection, and determines whether there is a work interruption during the monitoring detection process. If there is, the temperature rise data and the voltage and current data of each point during the interruption are recorded to provide a basis for determining the cause of the interruption. At the same time, the number of interruptions occurring during the detection process is recorded (the main control module monitors at the beginning of the detection, and counts and adds one operation every time an interruption is detected). After the detection is completed, the user can know whether the wireless charging device can be charged normally during the detection process. If it fails to charge normally, the reason for the failure to charge normally can be found out through data recording analysis.

[0083] In the above embodiment, the main control module and the wireless charging power receiving module are connected via a communication circuit module; in this embodiment, the communication circuit module is a Qi standard communication module. In this embodiment, the communication principle of the device is as follows:

[0084] The communication circuit module is controlled by the main control module, and the amplitude modulated communication signal is modulated into the LC oscillation signal in the wireless charging power receiving module through the communication circuit module. The external wireless charging device to be tested demodulates the amplitude modulated communication signal on the transmitting coil inductance of the wireless charging device to be tested by coupling the receiver (i.e., the receiving coil in the wireless charging power receiving module) to the wireless charging device to be tested, thereby achieving communication.

[0085] In the above embodiment, the device is used to implement Qi standard wireless charging device detection, the communication circuit module is a Qi standard communication module, and the main control module controls the Qi standard communication module to send a communication packet of the protocol to the wireless charging power receiving module at a time point preset by the system. In other embodiments, the device for wireless charging device detection of the present invention can also detect wireless charging devices according to standards set by other users.

[0086] In the above embodiment, the communication circuit module includes a first MOS transistor M1, a second MOS transistor M2, a first capacitor C1, a second capacitor C2 and a first resistor R1. The structure of the communication circuit module is as follows: Figure 3 As shown;

[0087] The drain of the first MOS tube M1 is connected to the first end of the first capacitor, and the source of the first MOS tube M1 is grounded;

[0088] The drain of the second MOS tube M2 is connected to the first end of the second capacitor C2, and the source of the second MOS tube M2 is grounded;

[0089] The gate of the first MOS transistor M1 and the gate of the second MOS transistor M2 are both connected to the first end of the first resistor R1, and the second end of the first resistor R1 is grounded;

[0090] The communication circuit module is connected to the wireless charging power receiving module through the second end of the first capacitor C1 and the second end of the second capacitor C2;

[0091] The communication circuit module is connected to the main control module via the first end of the first resistor R1 and is used to receive the amplitude modulation communication signal COMM preset by the system.

[0092] In the above embodiment, the wireless charging power receiving module is an LC semi-synchronous rectifier module. In other embodiments, the wireless charging power receiving module may also be composed of rectifier modules of other structures, such as using a Schottky rectifier circuit for rectification or synchronous rectification for rectification.

[0093] In the above embodiment, the LC semi-synchronous rectification module includes a first capacitor group unit, a second capacitor group unit, a third capacitor group unit, a third MOS tube M3, a fourth MOS tube M4, a voltage regulator diode D3, a first diode D1 and a second diode D2. The specific structure of the LC semi-synchronous rectification module can be found in Figure 2 As shown;

[0094] The drain of the third MOS tube M3 is respectively connected to the gate of the fourth MOS tube M4, the first end of the first capacitor group unit, the first end of the second capacitor group unit and the anode of the first diode D1;

[0095] The second end of the first capacitor group unit is connected to the first end of the receiving coil L1;

[0096] The drain of the fourth MOS tube M4 is respectively connected to the gate of the third MOS tube M3, the second end of the second capacitor group unit, the second end of the receiving coil L1 and the anode of the second diode D2;

[0097] The source of the third MOS tube M3 and the source of the fourth MOS tube M4 are both grounded;

[0098] The first end of the third capacitor group unit is simultaneously connected to the cathode of the first diode D1, the cathode of the second diode D2, and the cathode of the voltage regulator diode D3;

[0099] The second end of the third capacitor group unit is connected to the anode of the voltage stabilizing diode D3;

[0100] The anode of the voltage stabilizing diode D3 is grounded;

[0101] The LC semi-synchronous rectification module is connected to the communication circuit module through the first end and the second end of the second capacitor group unit, wherein the first end of the second capacitor group unit is connected to the second end of the first capacitor in the communication circuit module, and the second end of the second capacitor group unit is connected to the second end of the second capacitor in the communication circuit module, that is, the wireless charging power receiving module is connected to the communication circuit module through Figure 2 and Figure 3 The parts marked with network labels AC1 and AC2 are connected together, the position marked with network label AC1 in the wireless charging power receiving module is connected to the position marked with network label AC1 in the communication circuit module, and the position marked with network label AC2 in the wireless charging power receiving module is connected to the position marked with network label AC2 in the communication circuit module.

[0102] The voltage at the cathode of the voltage stabilizing diode D3 is the rectified voltage RECT output by the rectifier module.

[0103] In the above embodiment, the first capacitor group unit includes a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5, the first end of the third capacitor C3, the first end of the fourth capacitor C4 and the first end of the fifth capacitor C5 together constitute the first end of the first capacitor C1 group unit, the second end of the third capacitor C3, the second end of the fourth capacitor C4 and the second end of the fifth capacitor C5 together constitute the second end of the first capacitor C1 group unit;

[0104] The second capacitor group unit includes a sixth capacitor C6 and a seventh capacitor C7, the first end of the sixth capacitor C6 and the first end of the seventh capacitor C7 together constitute the first end of the second capacitor group unit, and the second end of the sixth capacitor C6 and the second end of the seventh capacitor C7 together constitute the second end of the second capacitor group unit;

[0105] The third capacitor group unit includes an eighth capacitor C8, a ninth capacitor C9 and a tenth capacitor C10. The first end of the eighth capacitor C8, the first end of the ninth capacitor C9 and the first end of the tenth capacitor C10 together constitute the first end of the third capacitor group unit. The second end of the eighth capacitor C8, the second end of the ninth capacitor C9 and the second end of the tenth capacitor C10 together constitute the second end of the third capacitor group unit.

[0106] In the above embodiment, the LC semi-synchronous rectification module and the communication circuit module together constitute the core power receiving component in the device. The structure of the communication circuit module in this embodiment is as follows: Figure 3 As shown, the structure of the LC semi-synchronous rectification module is as follows Figure 2 shown. Figure 3 The communication circuit module in the embodiment realizes the AC signal amplitude modulation communication of the Qi standard by loading capacitors (including the first capacitor C1 and the second capacitor C2) on the part connected to the LC semi-synchronous rectification module (i.e., the part with AC1 and AC2 drawn in the figure) (the main control module controls the communication circuit module switch to add a capacitive load to the LC oscillation circuit to realize the amplitude modulation communication of the LC oscillation signal), and the main control module realizes the timing control by sending the system preset amplitude modulation communication signal COMM to the communication circuit module. Figure 2 The positions marked with AC1 and AC2 in the wireless charging process have a high oscillation amplitude. In order to improve the withstand voltage characteristics and rectification efficiency of the device, the third MOS tube M3 and the fourth MOS tube M4 are both MOS tubes with large breakdown voltage and opening and closing voltage but small on-resistance, that is, the breakdown voltage V between the drain (D) and the source (S) of the third MOS tube M3 and the fourth MOS tube M4 is ds Higher (breakdown voltage V ds , means when Vg s = 0, the maximum voltage that the drain (D) and source (S) of the MOS tube can withstand, the breakdown voltage V ds The larger the value, the greater the withstand voltage of the semi-synchronous rectification circuit, and the better the withstand voltage characteristics of the receiving device). The on-off voltage V between the MOS tube gate (G) level and the source (S) level gs Also higher (on / off voltage V gs It also has the maximum voltage it can withstand. The larger the on / off voltage Vgs is, the greater the withstand voltage of the LC semi-synchronous rectifier circuit is, and the better the withstand voltage characteristics of the receiving device are). However, the on-resistance R between the drain (D) and the source (S) of the MOS tube when it is fully turned on is ds The resistance value needs to be small (on resistance R ds The smaller it is, the smaller the loss is during the semi-synchronous rectification process).

[0107] In the above embodiment, the device further comprises:

[0108] A low voltage difference linear output control module is connected to the wireless charging power receiving module and the main control module respectively, and the main control module controls the low voltage difference linear output control module to convert the rectified voltage RECT into a fixed output voltage;

[0109] The load switching control module is connected to the main control module and the low voltage difference linear output control module.

[0110] Among them, the main control module controls the load switching control module and the low-voltage difference linear output control module respectively. When the main control module controls the low-voltage difference linear output control module to output a fixed output voltage, the load switching control module will be adjusted to the resistance value corresponding to the above-mentioned fixed output voltage. The load switching control module contains a plurality of preset optional load resistors. The main control module only needs to select the corresponding load resistor based on the fixed output voltage to be output. The fixed output voltage output by the low-voltage difference linear output control module is loaded by the load resistor in the load switching control module.

[0111] In the above embodiment, the low voltage difference linear output control module includes a comparator U3A, a fifth MOS tube M5, a second resistor R2, a third resistor R3, an eleventh capacitor C11 and a voltage feedback unit. In this embodiment, a PMOS tube is selected as the fifth MOS tube M5. The specific structure of the low voltage difference linear output control module is as follows: Figure 4 As shown;

[0112] The inverting input terminal of the comparator U3A is connected to the main control module through the third resistor R3, and the main control module sends a regulation control signal PWMref to the inverting input terminal of the comparator U3A to adjust the comparison voltage reference voltage REFout, and the inverting input terminal of the comparator U3A is grounded through the eleventh capacitor C11;

[0113] The output end of the comparator U3A is connected to the gate of the fifth MOS tube M5.

[0114] The source end of the fifth MOS tube M5 is directly connected to the rectified voltage RECT, and the gate of the fifth MOS tube M5 is connected to the rectified voltage RECT through the second resistor R2;

[0115] The first end of the voltage feedback unit is connected to the drain end and the substrate of the fifth MOS tube M5, the first end of the voltage feedback unit is used to output the fixed output voltage Vout, the second end of the voltage feedback unit is connected to the non-inverting input end of the comparator U3A, and the third end of the voltage feedback unit is grounded;

[0116] The comparator U3A compares the feedback voltage FBvout transmitted from the fixed output voltage Vout with the comparison voltage reference voltage REFout to control the gate of the fifth MOS tube M5, and automatically controls the switching of the fifth MOS tube M5 to achieve closed-loop control of the low voltage difference linear output control module.

[0117] In the above embodiment, the voltage feedback unit includes a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a fourth resistor R4 and a fifth resistor R5;

[0118] The first end of the twelfth capacitor C12, the first end of the thirteenth capacitor C13, the first end of the fourteenth capacitor C14 and the first end of the fourth resistor R4 together constitute the first end of the voltage feedback unit;

[0119] The second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5;

[0120] The second end of the twelfth capacitor C12 is connected to the connection point of the fourth resistor R4 and the fifth resistor R5; the second end of the twelfth capacitor C12 constitutes the second end of the voltage feedback unit;

[0121] The second end of the fifth resistor R5, the second end of the twelfth capacitor C12, and the second end of the thirteenth capacitor C13 together constitute the third end of the voltage feedback unit.

[0122] Among them, the low-voltage difference linear output control module converts the input rectified voltage RECT of the module into a fixed output voltage Vout. In the actual operation of the circuit, the low-voltage difference linear output control module (LDO output control module) outputs different fixed output voltages Vout according to the actual requirements of the device used for wireless charging device detection (the voltage value of the fixed output voltage can be preset according to actual needs, and the general fixed output voltage can be set to 5V and 9V). The output fixed output voltage is the load selected in the load switching control module, and the control signal provided by the main control module determines the voltage value of the output fixed output voltage.

[0123] In the above embodiment, the device further comprises:

[0124] The temperature sensor module is used to regularly collect the temperature of the device and the environment, and feed back the collected temperature information of the device and the environment to the main control module, so as to realize the monitoring of the temperature rise data during the detection process of the device; the temperature sensor module can be composed of several NTC resistors, and the number of NTC resistors is consistent with the number of temperature points to be measured.

[0125] The digital-to-analog converter voltage and current acquisition module (also referred to as the ADC voltage and current acquisition module) is respectively connected to the wireless charging power receiving module, the low-voltage difference linear output control module and the main control module, and is used to enable the device to monitor the voltage and current data of each point in the device during the detection process. Specifically, it can collect data on the voltage and current signals such as the rectified voltage RECT, the fixed output voltage Vout, the feedback voltage FBvout delivered to the comparator by the feedback unit in the low-voltage difference linear output control module, and the output current generated by the fixed output voltage Vout loaded on the load in the load switching control module.

[0126] A data recording module, connected to the main control module, for recording data during the detection process, and the data recording module can be formed by a flash circuit (flash memory circuit);

[0127] The data display module is connected to the main control module and is used to display the data in the detection process. The data display module can be formed by a digital tube circuit.

[0128] A data transmission module is connected to the main control module and is used to transmit the data in the detection process to an external device (the external device can be a printer or other device that can process data, such as a computer). A UART (universal asynchronous receiver / transmitter) circuit can be used to form the data transmission module, and the data transmission module can transmit the data in the detection process to an external storage device.

[0129] In the above embodiment, the temperature of the device includes the temperature of the PCBA board used to carry all the components in the device and the temperature of the receiving coil L1. The PCBA board is where all the modules in the entire device are on, and the PCB board is the carrier connecting all the components in the device.

[0130] In the above embodiment, the device further includes a power generation module for providing a voltage source for the main control module.

[0131] In the above embodiment, the power generation module is a dual-redundancy power control circuit module, which includes an external input power unit and a rectified voltage generating power unit, both of which are connected to the main control module, and the rectified voltage generating power unit is also connected to the wireless charging power receiving module. During operation, this dual-redundancy power control circuit module can provide digital power VDD for the control module and other modules in the device through the external input power unit, and can also obtain digital power VDD from the rectified voltage generating power unit, so that the control module and other modules in the device can work normally. In this way, during the test process, the external input power unit can enable the main control module and related auxiliary modules to maintain data recording, monitoring and other functions when the rectified voltage generating power unit cannot provide power to the device. Among them, the digital power VDD provided by the rectified voltage generating power unit is converted from the rectified voltage RECT. Under normal circumstances, the rectifier voltage generating power supply unit can provide digital power VDD for the control module and other modules in the device. However, when a large number of receiving devices are connected to the host computer in combination with the factory aging rack system to monitor the aging process, the digital power VDD needs to be provided by an external input power supply unit. The external input power supply unit provides a backup power supply for the device used for wireless charging device detection in the present invention.

[0132] In the above-mentioned embodiment, the device for wireless charging device detection of the present invention includes a main control module, a communication circuit module, a low voltage difference linear output control module (also referred to as an LDO output control module), a load switching control module, a digital-to-analog converter voltage and current acquisition module (also referred to as an ADC current and voltage acquisition module), a temperature sensor module, an external input power supply unit, a rectifier voltage generating power supply unit (also referred to as a rectifier voltage RECT output generating unit), a data recording module, a data transmission module, an auxiliary switching control module and an LC semi-synchronous rectifier module. Among them, the receiving coil L1 is connected to the LC semi-synchronous rectifier module and the communication circuit module. The specific connection relationship can be referred to. Figure 4 As shown, the apparatus for detecting wireless charging equipment in this embodiment can be applied to function and aging tests of wireless charging equipment of Qi standard.

[0133] A method for detecting a wireless charging device based on the apparatus for detecting a wireless charging device in the above embodiment includes:

[0134] (1) The main control module performs timing control on the wireless charging power receiving module to control the wireless charging power receiving module to implement the power receiving operation, which specifically includes the following operation steps:

[0135] (1.1) The main control module sends the system preset amplitude modulation communication signal to the communication circuit module;

[0136] (1.2) The communication circuit module sends a communication packet containing a system preset protocol to the wireless charging power receiving module according to the system preset amplitude modulation communication signal;

[0137] (1.3) The wireless charging power receiving module communicates with the external wireless charging device to be tested according to the communication packet to achieve the power reception;

[0138] (2) The main control module controls the temperature sensor module to regularly collect the temperature of the device and the environment, so as to obtain the temperature rise data during the test process; the main control module controls the digital-to-analog converter voltage and current acquisition module to measure the voltage and current data of each point in the device during the detection process, so as to obtain the voltage and current data during the test process; the main control module monitors the number of interruptions and the reasons for the interruptions during the test process, so as to obtain the interruption data during the test process.

[0139] The main control module monitors the number of interruptions and the reasons for interruptions during the test process, including the following steps:

[0140] (a1) When the wireless charging power receiving module starts to receive power for the first time, the main control module starts to monitor the test process;

[0141] (a2) the main control module monitors whether the wireless charging power receiving module is disconnected during the power receiving process;

[0142] (a3) If the connection is interrupted, proceed to the subsequent step (a4); otherwise, return to the above step (a2) until the test is completed;

[0143] (a4) The main control module records the temperature of the device and the environment corresponding to the interruption process and the voltage and current data of each point in the device, providing a basis for determining the cause of the interruption;

[0144] (a5) The number of interruptions recorded in the main control module is counted by one, and the process returns to the above step (a1).

[0145] (3) The data recording module stores the temperature rise data and the voltage and current data;

[0146] (4) The data transmission module transmits the temperature rise data and the voltage and current data to the data transmission module;

[0147] (5) The data display module displays the temperature rise data and voltage and current data.

[0148] (6) The data transmission module transmits the temperature rise data, interruption data, and voltage and current data to an external device.

[0149] The device for wireless charging device detection in the above embodiment and the corresponding method adopt a dual-redundancy power supply control circuit module to form a power generation module. The dual-redundancy power supply control circuit module includes an external input power supply unit and a rectified voltage generating power supply unit, which can realize the port connection between the wireless charging device and the device during the test. The main control module can well maintain the ability to record and transmit data, and realize the function of full-time monitoring of the interruption cause, the number of interruptions and the coil temperature rise data during the test. The device for wireless charging device detection in the above embodiment includes a data transmission module and a data recording module, so that the user can customize the offline or online data recording method according to different usage methods. Compared with the detection device composed of an integrated system-on-chip (SOC) in the prior art, the device for wireless charging device detection in the above embodiment has a longer service life, better voltage resistance, better temperature rise characteristics, and is more suitable for aging testing.

[0150] The device and corresponding method for wireless charging device detection of the present invention can effectively realize the detection of wireless charging devices. Since the main control module and the wireless charging power receiving module are separated structures, the device has the characteristics of high temperature resistance and high voltage resistance, and the device has a long service life. The main control module in the device can collect and record data during the detection process, and can more conveniently perform fault analysis on faults occurring during the inspection process. When a dual-redundancy power supply control circuit module is used as a power supply generation module in the device to provide a voltage source for the main control module, a backup power supply can be provided to the device when one of the power supplies fails, so as to prevent the main control module from losing power and enable the main control module to maintain the ability to record data and transmit data. The device and corresponding method for wireless charging device detection of the present invention have the characteristics of easy operation, high reliability, and long service life, and can well inspect wireless charging devices.

[0151] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it is apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Claims

1. A device for detecting wireless charging equipment, characterized in that: The device comprises: A wireless charging power receiving module, comprising a receiving coil, for receiving power during the detection process and converting the voltage received by the receiving coil into a rectified voltage; A main control module, used to perform timing control on the wireless charging power receiving module during the detection process, and to control the working state of the device during the detection process; The main control module and the wireless charging power receiving module are separate structures; The device also includes a power generation module, which is used to provide a voltage source for the main control module; The power generation module is a dual-redundancy power supply control circuit module, which includes an external input power supply unit and a rectified voltage generating power supply unit. Both the external input power supply unit and the rectified voltage generating power supply unit are connected to the main control module, and the rectified voltage generating power supply unit is also connected to the wireless charging power receiving module.

2. The device for detecting wireless charging equipment according to claim 1, characterized in that: The main control module and the wireless charging power receiving module are connected via a communication circuit module; the communication circuit module is a Qi standard communication module.

3. The device for detecting wireless charging equipment according to claim 2, characterized in that: The communication circuit module includes a first MOS tube, a second MOS tube, a first capacitor, a second capacitor and a first resistor; The drain of the first MOS tube is connected to the first end of the first capacitor, and the source of the first MOS tube is grounded; The drain of the second MOS tube is connected to the first end of the second capacitor, and the source of the second MOS tube is grounded; The gate of the first MOS tube and the gate of the second MOS tube are both connected to the first end of the first resistor, and the second end of the first resistor is grounded; The communication circuit module is connected to the wireless charging power receiving module through the second end of the first capacitor and the second end of the second capacitor; The communication circuit module is connected to the main control module via the first end of the first resistor.

4. The device for detecting wireless charging equipment according to claim 3, characterized in that: The wireless charging power receiving module is an LC semi-synchronous rectification module; Wherein, the LC semi-synchronous rectification module includes a first capacitor group unit, a second capacitor group unit, a third capacitor group unit, a third MOS tube, a fourth MOS tube, a voltage regulator diode, a first diode and a second diode; The drain of the third MOS tube is respectively connected to the gate of the fourth MOS tube, the first end of the first capacitor group unit, the first end of the second capacitor group unit and the anode of the first diode; The second end of the first capacitor group unit is connected to the first end of the receiving coil; The drain of the fourth MOS tube is respectively connected to the gate of the third MOS tube, the second end of the second capacitor group unit, the second end of the receiving coil and the anode of the second diode; The source of the third MOS tube and the source of the fourth MOS tube are both grounded; The first end of the third capacitor group unit is simultaneously connected to the cathode of the first diode, the cathode of the second diode and the cathode of the voltage regulator diode; The second end of the third capacitor group unit is connected to the anode of the voltage stabilizing diode; The anode of the voltage stabilizing diode is grounded, and the cathode of the voltage stabilizing diode outputs the rectified voltage; The first end of the second capacitor group unit is connected to the second end of the first capacitor in the communication circuit module, and the second end of the second capacitor group unit is connected to the second end of the second capacitor in the communication circuit module.

5. The device for detecting wireless charging equipment according to claim 4, characterized in that: The first capacitor group unit includes a third capacitor, a fourth capacitor and a fifth capacitor, the first end of the third capacitor, the first end of the fourth capacitor and the first end of the fifth capacitor together constitute the first end of the first capacitor group unit, and the second end of the third capacitor, the second end of the fourth capacitor and the second end of the fifth capacitor together constitute the second end of the first capacitor group unit; The second capacitor group unit includes a sixth capacitor and a seventh capacitor, the first end of the sixth capacitor and the first end of the seventh capacitor together constitute the first end of the second capacitor group unit, and the second end of the sixth capacitor and the second end of the seventh capacitor together constitute the second end of the second capacitor group unit; The third capacitor group unit includes an eighth capacitor, a ninth capacitor and a tenth capacitor. The first end of the eighth capacitor, the first end of the ninth capacitor and the first end of the tenth capacitor together constitute the first end of the third capacitor group unit, and the second end of the eighth capacitor, the second end of the ninth capacitor and the second end of the tenth capacitor together constitute the second end of the third capacitor group unit.

6. The device for detecting wireless charging equipment according to claim 1, characterized in that: The device also includes: A low voltage difference linear output control module is connected to the wireless charging power receiving module and the main control module respectively, and the main control module controls the low voltage difference linear output control module to convert the rectified voltage into a fixed output voltage; The load switching control module is connected to the main control module and the low voltage difference linear output control module.

7. The device for detecting wireless charging equipment according to claim 6, characterized in that: The low voltage difference linear output control module includes a comparator, a fifth MOS tube, a second resistor, a third resistor, an eleventh capacitor and a voltage feedback unit; The inverting input terminal of the comparator is connected to the main control module through the third resistor, the main control module sends an adjustment control signal to the inverting input terminal of the comparator, and the inverting input terminal of the comparator is grounded through the eleventh capacitor; The comparator output terminal is connected to the gate of the fifth MOS tube; The source end of the fifth MOS tube is directly connected to the rectified voltage, and the gate of the fifth MOS tube is connected to the rectified voltage through the second resistor; The drain end of the fifth MOS tube is connected to the first end of the voltage feedback unit, the fixed output voltage is outputted by the first end of the voltage feedback unit, the second end of the voltage feedback unit is connected to the non-inverting input end of the comparator, and the third end of the voltage feedback unit is grounded; The voltage feedback unit includes a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fourth resistor and a fifth resistor; The first end of the twelfth capacitor, the first end of the thirteenth capacitor, the first end of the fourteenth capacitor and the first end of the fourth resistor together constitute the first end of the voltage feedback unit; The second end of the fourth resistor is connected to the first end of the fifth resistor; The second end of the twelfth capacitor is connected to the connection point of the fourth resistor and the fifth resistor; the second end of the twelfth capacitor constitutes the second end of the voltage feedback unit; The second end of the fifth resistor, the second end of the twelfth capacitor, and the second end of the thirteenth capacitor together constitute the third end of the voltage feedback unit.

8. The device for detecting wireless charging equipment according to claim 6, characterized in that: The device also includes: The temperature sensor module is used to regularly collect the temperature of the device and the environment, and feed back the collected temperature information of the device and the environment to the main control module, so that the device can monitor the temperature rise data during the detection process; A digital-to-analog converter voltage and current acquisition module is respectively connected to the wireless charging power receiving module, the low voltage difference linear output control module and the main control module, and is used to enable the device to monitor the voltage and current data of each point in the device during the detection process; A data recording module, connected to the main control module, for recording data during the detection process; A data display module, connected to the main control module, for displaying the data in the detection process; The data transmission module is connected to the main control module and is used to transmit the data in the detection process to an external device.

9. The device for detecting wireless charging equipment according to claim 8, characterized in that: The temperature of the device includes the temperature of the PCBA board used to carry all the components in the device and the temperature of the receiving coil.

10. The device for detecting wireless charging equipment according to claim 1, characterized in that: The main control module is composed of a micro control unit, and the micro control unit is composed of STM32.

11. A method for detecting a wireless charging device based on the apparatus according to any one of claims 1 to 10, characterized in that: The device comprises a temperature sensor module and a digital-to-analog converter voltage and current acquisition module, and the method comprises: Step (1): the main control module performs timing control on the wireless charging power receiving module to control the wireless charging power receiving module to implement the power receiving operation; Step (2): the main control module controls the temperature sensor module to regularly collect the temperature of the device and the environment, so as to obtain the temperature rise data during the test process; the main control module controls the digital-to-analog converter voltage and current acquisition module to measure the voltage and current data of each point in the device during the detection process, so as to obtain the voltage and current data during the test process; the main control module monitors the number of interruptions and the reasons for the interruptions during the test process, so as to obtain the interruption data during the test process.

12. The method for realizing detection of a wireless charging device according to claim 11, characterized in that: The main control module monitors the number of interruptions and the reasons for interruptions during the test process, including the following steps: (a1) When the wireless charging power receiving module starts to receive power for the first time, the main control module starts to monitor the test process; (a2) the main control module monitors whether the wireless charging power receiving module is disconnected during the power receiving process; (a3) If the connection is interrupted, proceed to the subsequent step (a4); otherwise, return to the above step (a2) until the test is completed; (a4) The main control module records the temperature of the device and the environment corresponding to the interruption process and the voltage and current data of each point in the device, providing a basis for determining the cause of the interruption; (a5) The number of interruptions recorded in the main control module is counted by one, and the process returns to the above step (a1).

13. The method for realizing detection of a wireless charging device according to claim 11, characterized in that: The device comprises a data display module and a data recording module, and the step (2) further comprises the following steps: Step (3): the data recording module stores the temperature rise data, interruption data, and voltage and current data; Step (4): the main control module transmits the temperature rise data, interruption data, and voltage and current data to the data display module; Step (5): The data display module displays the temperature rise data, interruption data, and voltage and current data.

14. The method for realizing detection of a wireless charging device according to claim 13, characterized in that: The device includes a data transmission module, and after step (5), further includes the following steps: Step (6): The data transmission module transmits the temperature rise data, interruption data, and voltage and current data to an external device.

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