CN111257662A - Device and corresponding method applied to wireless charging equipment detection - Google Patents
Device and corresponding method applied to wireless charging equipment detection Download PDFInfo
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- CN111257662A CN111257662A CN201811465372.6A CN201811465372A CN111257662A CN 111257662 A CN111257662 A CN 111257662A CN 201811465372 A CN201811465372 A CN 201811465372A CN 111257662 A CN111257662 A CN 111257662A
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Abstract
The invention relates to a device and a corresponding method applied to wireless charging equipment detection, wherein the device adopts a separated main control module and a wireless charging electric energy receiving module, can effectively realize the detection of the wireless charging equipment, has the characteristics of high temperature resistance and high voltage resistance, and has longer service life. The device and the corresponding method applied to the detection of the wireless charging equipment have the characteristics of convenience in operation, high reliability and long service life, and can well detect the wireless charging equipment.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to the field of wireless charging, and specifically relates to a device and a corresponding method applied to wireless charging equipment detection.
Background
A new charging technology developed in recent years during wireless charging, and the Qi standard is a standard established for wireless charging. After the wireless charging function of the iPhone and the Samsung series mobile phones in 2017, the market of the wireless charging equipment with the Qi standard really increases greatly, and the production places of the main wireless charging equipment with the Qi standard are also concentrated in China, so that the wireless charging equipment is a novel charging technology.
The aging test is required in the production of electronic products, the wireless charging equipment of the Qi standard is not an exception, but the wireless charging equipment of the Qi standard is a novel wireless charging mode, and different from the traditional wired charging equipment, the wired charging equipment can be directly loaded with a digital power supply, an electronic load and other instruments for aging test, and the wireless charging equipment cannot be directly loaded with a load, and the wireless charging equipment needs a wireless charging receiving device for communication handshake matching and then is loaded by the wireless charging receiving device so as to achieve the functions of performing the function test, the loading capability, the aging test and the like on the wireless charging equipment. However, the existing wireless charging equipment function and aging test devices, methods and standards aiming at the Qi standard are not uniform.
In the prior art, for a Qi standard wireless charging device, a receiving module made of a wireless charging receiving single chip of companies such as TI and IDT is mainly used for performing a function and aging test. The receiving module manufactured by the wireless charging receiving single chip is a wireless charging receiver, and the chip can generate a large amount of heat in the process of long-time high-power on-load aging. The single chip is a wireless charging and receiving integrated SOC (system on chip, also called system on chip, which is an integrated circuit with special purpose), and is influenced by the process and the chip area, the voltage resistance and high temperature resistance of the single chip can not meet the requirements of a testing device, and the receiving module is easy to damage.
The receiving module manufactured by the wireless charging receiving single chip is used for carrying out wireless charging equipment function and aging test, generally, whether the system is normally charged or not is checked after the experiment is finished, and the test method cannot monitor interruption reasons, interruption times and coil temperature rise data encountered in the test process.
Disclosure of Invention
The invention aims to overcome at least one of the defects of the prior art and provides a device and a corresponding method for detecting wireless charging equipment, wherein the device and the method can monitor interruption reasons, interruption times and coil temperature rise data in a test process, and have long service life.
In order to achieve the above objects and other objects, the present invention provides an apparatus and a corresponding method for detecting a wireless charging device, comprising:
this be applied to wireless charging equipment detection's device, its key feature is, the device include:
the wireless charging electric energy receiving module comprises a receiving coil and a control module, wherein the receiving coil is used for receiving electric energy in the detection process and converting the voltage received by the receiving coil into rectified voltage;
the main control module is used for carrying out time sequence control on the wireless charging electric energy receiving module in the detection process and controlling the working state of the device in the detection process;
the main control module and the wireless charging electric energy receiving module are of a separated structure.
Preferably, the main control module is connected with the wireless charging electric energy receiving module through a communication circuit module; the communication circuit module is a Qi standard communication module.
Preferably, the communication circuit module includes a first MOS transistor, a second MOS transistor, a first capacitor, a second capacitor, and a first resistor;
the drain electrode of the first MOS tube is connected with the first end of the first capacitor, and the source electrode of the first MOS tube is grounded;
the drain electrode of the second MOS tube is connected with the first end of the second capacitor, and the source electrode of the second MOS tube is grounded;
the grid electrode of the first MOS tube and the grid electrode of the second MOS tube are both connected with the first end of the first resistor, and the second end of the first resistor is grounded;
the communication circuit module is connected with the wireless charging electric energy receiving module through the second end of the first capacitor and the second end of the second capacitor;
the communication circuit module is connected with the main control module through the first end of the first resistor.
Furthermore, the wireless charging electric energy receiving module is an LC semi-synchronous rectification module;
the LC semi-synchronous rectification module comprises a first capacitor bank unit, a second capacitor bank unit, a third MOS (metal oxide semiconductor) tube, a fourth MOS tube, a voltage stabilizing diode, a first diode and a second diode;
the drain electrode of the third MOS tube is respectively connected with the grid electrode of the fourth MOS tube, the first end of the first capacitor bank unit, the first end of the second capacitor bank unit and the anode of the first diode;
the second end of the first capacitor bank unit is connected with the first end of the receiving coil;
the drain electrode of the fourth MOS tube is respectively connected with the grid electrode of the third MOS tube, the second end of the second capacitor bank unit, the second end of the receiving coil and the anode of the second diode;
the source electrode of the third MOS tube and the source electrode of the fourth MOS tube are both grounded;
the first end of the third capacitor bank unit is simultaneously connected with the cathode of the first diode, the cathode of the second diode and the cathode of the voltage stabilizing diode;
the second end of the third capacitor bank unit is connected with 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 bank unit is connected with the second end of the first capacitor in the communication circuit module, and the second end of the second capacitor bank unit is connected with the second end of the second capacitor in the communication circuit module.
Furthermore, the first capacitor bank 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 form the first end of the first capacitor bank 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 form the second end of the first capacitor bank unit;
the second capacitor bank unit comprises a sixth capacitor and a seventh capacitor, a first end of the sixth capacitor and a first end of the seventh capacitor jointly form a first end of the second capacitor bank unit, and a second end of the sixth capacitor and a second end of the seventh capacitor jointly form a second end of the second capacitor bank unit;
the third capacitor bank unit comprises an eighth capacitor, a ninth capacitor and a tenth capacitor, wherein the first end of the eighth capacitor, the first end of the ninth capacitor and the first end of the tenth capacitor form the first end of the third capacitor bank unit together, and the second end of the eighth capacitor, the second end of the ninth capacitor and the second end of the tenth capacitor form the second end of the third capacitor bank unit together.
Preferably, the device further comprises:
the low-voltage-difference linear output control module is respectively connected with the wireless charging electric energy receiving module and the main control module, and the main control module controls the low-voltage-difference linear output control module to convert the rectified voltage into fixed output voltage;
and the load switching control module is connected with the main control module and the low-dropout linear output control module.
Preferably, the low dropout linear output control module comprises a comparator, a fifth MOS transistor M5, a second resistor, a third resistor, an eleventh capacitor and a voltage feedback unit;
the negative input end of the comparator is connected with the master control module through the third resistor R3, the master control module sends an adjusting control signal to the negative input end of the comparator, and the negative input end of the comparator is grounded through the eleventh capacitor;
the output end of the comparator is connected with the grid electrode of the fifth MOS tube;
the source end of the fifth MOS tube is directly connected with the rectified voltage, and the grid electrode of the fifth MOS tube is connected with the rectified voltage through the second resistor;
the drain terminal of the fifth MOS tube is connected with the first terminal of the voltage feedback unit, the first terminal of the voltage feedback unit outputs the fixed output voltage, the second terminal of the voltage feedback unit is connected with the non-inverting input terminal of the comparator, and the third terminal of the voltage feedback unit is grounded;
the voltage feedback unit comprises 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 jointly form the first end of the voltage feedback unit;
the second end of the fourth resistor is connected with the first end of the fifth resistor;
the second end of the twelfth capacitor is connected with the joint of the fourth resistor and the fifth resistor; the second end of the twelfth capacitor forms the second end of the voltage feedback unit;
and the second end of the fifth resistor, the second end of the twelfth capacitor and the second end of the thirteenth capacitor jointly form a third end of the voltage feedback unit.
More preferably, the device further comprises:
the temperature sensor module is used for periodically acquiring the temperatures of the device and the environment and feeding back the acquired information of the temperatures of the device and the environment to the main control module so as to realize the monitoring of the temperature rise data in the detection process by the device;
the digital-to-analog converter voltage and current acquisition module is respectively connected with the wireless charging electric energy receiving module, the low-voltage-difference linear output control module and the main control module and is used for monitoring voltage and current data of each point in the detection process by the device;
the data recording module is connected with the main control module and is used for recording data in the detection process;
the data display module is connected with the main control module and is used for displaying the data in the detection process;
and the data transmission module is connected with the main control module and is used for transmitting the data in the detection process to external equipment.
Further, the temperature of the apparatus includes the temperature of the PCBA board carrying all the devices in the apparatus and the temperature of the receiving coil.
Preferably, the device further comprises a power supply generation module for providing a voltage source for the main control module;
the power generation module is a dual-redundancy power control circuit module, the dual-redundancy power control circuit module comprises an external input power unit and a rectified voltage generation power unit, the external input power unit and the rectified voltage generation power unit are both connected with the main control module, and the rectified voltage generation power unit is also connected with the wireless charging electric energy receiving module.
Preferably, the main control module is composed of a micro control unit, and the micro control unit is composed of an STM32 chip.
The method for realizing the detection of the wireless charging equipment based on the device is mainly 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 the following steps:
(1) the master control module carries out time sequence control on the wireless charging electric energy receiving module and controls the wireless charging electric energy receiving module to realize the electric energy receiving operation;
(2) the main control module controls the temperature sensor module to periodically acquire the temperature of the device and the environment and is used for acquiring temperature rise data in the test process; the main control module controls the digital-to-analog converter voltage and current acquisition module to measure voltage and current data of each point in the detection process, and the voltage and current data are used for acquiring voltage and current data in the test process; and the main control module monitors the interruption times and interruption reasons in the test process and is used for acquiring interruption data in the test process.
Preferably, the step of monitoring, by the main control module, the number of interrupts and the cause of the interrupts in the test process includes the steps of:
(a1) when the wireless charging electric energy receiving module starts to receive electric energy for the first time, the main control module starts to monitor the test process;
(a2) the master control module monitors whether the wireless charging electric energy receiving module has connection interruption in the electric energy receiving process;
(a3) if the connection interruption occurs, continuing the subsequent step (a4), otherwise, returning to the step (a2) until the test is finished;
(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, and provides a basis for judging the interruption reason;
(a5) and (c) counting the interruption times recorded in the main control module by one, and returning to the step (a 1).
Preferably, the device comprises a data display module and a data recording module, and the following steps are further included after the step (2):
(3) the data recording module stores the temperature rise data, the interruption data, the voltage data and the current data;
(4) the main control module transmits the temperature rise data, the interruption data, the voltage data and the current data to the data display module;
(5) and the data display module displays the temperature rise data, the interruption data and the voltage and current data.
Preferably, the apparatus includes a data transmission module, and the step (5) further includes the following steps:
(6) and the data transmission module transmits the temperature rise data, the interruption data, the voltage data and the current data to external equipment.
The device and the corresponding method applied to the detection of the wireless charging equipment can effectively realize the detection of the wireless charging equipment, and the main control module and the wireless charging electric energy receiving module are of a separated structure, so the device has the characteristics of high temperature resistance and high voltage resistance, the service life of the device is longer, the main control module in the device can collect and record data in the detection process, the fault analysis of the fault occurring in the detection process can be more conveniently carried out, and when the device adopts the dual-redundancy power supply control circuit module as the power supply generation module to supply power to the main control module by a voltage source, a standby power supply can be provided for the equipment when one power supply fails, the power failure of the main control module is prevented, and the main control module can keep the data recording and data transmission capabilities. The device and the corresponding method applied to the detection of the wireless charging equipment have the characteristics of convenience in operation, high reliability and long service life, and can well detect the wireless charging equipment.
Drawings
Fig. 1 is a block diagram of an apparatus for wireless charging device detection according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an LC semi-synchronous rectification module according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a communication circuit module according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a low dropout linear output control module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments.
As shown in fig. 1, in this embodiment, the apparatus for 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-dropout linear output control module, an external input power unit, and a rectified voltage generation power unit, and is connected to an external wireless charging device to be detected through the wireless charging power receiving module.
The following further describes, with reference to fig. 1 to fig. 4, an apparatus applied to wireless charging device detection in the foregoing embodiment, where the apparatus includes a wireless charging power receiving module and a main control module.
As shown in fig. 2, the wireless charging power receiving module includes a receiving coil L1. The wireless charging power receiving module is used for receiving power in the detection process, converting the voltage received by the receiving coil into rectified voltage, and performing wireless power transmission with the wireless charging equipment to be detected through the receiving coil L1;
in this embodiment, the main control module is composed of a Micro Control Unit (MCU) composed of an STM32 chip. The main control module is a control core of the apparatus, and in this embodiment, functions such as logic control are implemented by using an STM32 chip.
The main control module and the wireless charging electric energy receiving module are of a separated structure.
The device applied to the detection of the wireless charging equipment is composed of a separated main control module and a wireless charging electric energy receiving module, is not of an SOC (system on chip) structure, and a receiving coil L1 is positioned in the wireless charging electric energy receiving module, so that the device applied to the detection of the wireless charging equipment is not limited by a control chip in the detection process, can bear higher voltage and current, has good high-temperature resistance, is longer in service life, and can better perform function and aging test on the wireless charging equipment.
In the embodiment, the main control module of the invention can combine with hardware structures such as the temperature sensor module, the digital-to-analog converter voltage circuit acquisition module and the data recording module to realize data acquisition and data recording operations in the detection process. The main control module acquires temperature rise data and voltage and current data of each point in the device in the detection process to acquire the temperature rise data and the voltage and current data of each point in the device, judges whether the situation of work interruption occurs or not in the monitoring detection process, records the temperature rise data and the voltage and current data of each point in the interruption process if the situation of work interruption occurs, provides a basis for judging the interruption reason, and records the interruption times in the detection process (the main control module monitors when the detection starts, and counts and adds one operation once when the interruption is monitored every time). The user can learn after the detection end that the testing process, whether wireless charging equipment can carry out normal charging, if can not carry out normal charging, accessible data record analysis learns what reason leads to can not carrying out normal charging.
In the above embodiment, the main control module and the wireless charging power receiving module are connected through a communication circuit module; in this embodiment, the communication circuit module is a Qi standard communication module, and in this embodiment, the communication principle of the apparatus is as follows:
the main control module controls the communication circuit module, the communication circuit module modulates the amplitude modulation communication signal into the LC oscillation signal in the wireless charging electric energy receiving module, and the external wireless charging equipment to be tested demodulates the amplitude modulation communication signal which is coupled to the inductance of the transmitting coil in the wireless charging equipment to be tested by the receiver (namely, the receiving coil in the wireless charging electric energy receiving module), so as to realize communication.
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 a protocol to the wireless charging power receiving module at a time point preset by a system.
In the above embodiments, the communication circuit module includes the first MOS transistor M1, the second MOS transistor M2, the first capacitor C1, the second capacitor C2 and the first resistor R1, and the structure of the communication circuit module is as shown in fig. 3;
the drain of the first MOS transistor M1 is connected to the first end of the first capacitor, and the source of the first MOS transistor M1 is grounded;
the drain of the second MOS transistor M2 is connected to the first end of the second capacitor C2, and the source of the second MOS transistor M2 is grounded;
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;
the communication circuit module is connected with the wireless charging power receiving module through a second end of the first capacitor C1 and a second end of the second capacitor C2;
the communication circuit module is connected with the main control module through a first end of the first resistor R1 and is used for receiving an amplitude modulation communication signal COMM preset by a system.
In the above embodiments, the wireless charging power receiving module is an LC semi-synchronous rectification module, and in other embodiments, the wireless charging power receiving module may also be formed by rectification modules with other structures, for example, rectification is performed by using a schottky rectification circuit or a synchronous rectification mode.
In the above embodiment, the LC semi-synchronous rectification module includes a first capacitor bank unit, a second capacitor bank unit, a third MOS transistor M3, a fourth MOS transistor M4, a zener diode D3, a first diode D1, and a second diode D2, and the specific structure of the LC semi-synchronous rectification module can be seen in fig. 2;
the drain of the third MOS transistor M3 is connected to the gate of the fourth MOS transistor M4, the first end of the first capacitor bank unit, the first end of the second capacitor bank unit, and the anode of the first diode D1, respectively;
the second end of the first capacitor bank unit is connected with the first end of the receiving coil L1;
the drain of the fourth MOS transistor M4 is connected to the gate of the third MOS transistor M3, the second end of the second capacitor bank unit, the second end of the receiving coil L1, and the anode of the second diode D2, respectively;
the source electrode of the third MOS transistor M3 and the source electrode of the fourth MOS transistor M4 are both grounded;
the first end of the third capacitor bank unit is simultaneously connected with the cathode of the first diode D1, the cathode of the second diode D2 and the cathode of the voltage stabilizing diode D3;
the second end of the third capacitor bank unit is connected with the anode of the zener diode D3;
the anode of the voltage stabilizing diode D3 is grounded;
the LC semi-synchronous rectification module is connected with the communication circuit module through the first end and the second end of the second capacitor bank unit, wherein the first end of the second capacitor bank unit is connected with the second end of the first capacitor in the communication circuit module, the second end of the second capacitor bank unit is connected with the second end of the second capacitor in the communication circuit module, that is, the wireless charging power receiving module and the communication circuit module are connected together through the portions marked with the network labels AC1 and AC2 in fig. 2 and fig. 3, the position marked with the network label AC1 in the wireless charging power receiving module is connected with the position marked with the network label AC1 in the communication circuit module, and the position marked with the network label AC2 in the wireless charging power receiving module is connected with the position marked with the network label AC2 in the communication circuit module.
The voltage at the cathode of the zener diode D3 is the rectified voltage RECT output by the rectifying module.
In the above embodiment, the first capacitor group unit includes a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5, a first end of the third capacitor C3, a first end of the fourth capacitor C4 and a first end of the fifth capacitor C5 together form a first end of the first capacitor C1 group unit, and a second end of the third capacitor C3, a second end of the fourth capacitor C4 and a second end of the fifth capacitor C5 together form a second end of the first capacitor C1 group unit;
the second capacitor bank unit comprises a sixth capacitor C5 and a seventh capacitor C7, a first end of the sixth capacitor C5 and a first end of the seventh capacitor C7 jointly form a first end of the second capacitor bank unit, and a second end of the sixth capacitor C5 and a second end of the seventh capacitor C7 jointly form a second end of the second capacitor bank unit;
the third capacitor bank unit includes an eighth capacitor C8, a ninth capacitor C9 and a tenth capacitor C10, wherein 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 form the first end of the third capacitor bank unit, and 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 form the second end of the third capacitor bank unit.
In the above embodiments, the LC semi-synchronous rectification module and the communication circuit module are used to jointly form the core power receiving component in the apparatus, the structure of the communication circuit module in this embodiment is shown in fig. 3, and the structure of the LC semi-synchronous rectification module is shown in fig. 2. The communication circuit module in fig. 3 loads capacitors (including the first capacitor C1 and the second capacitor C2) on a part (i.e., a part drawn with AC1 and AC 2) connected to the LC semi-synchronous rectification module to implement AC signal amplitude modulation communication of Qi standard (the master control module controls a switch of the communication circuit module to add capacitive loads to the LC oscillating circuit to implement amplitude modulation communication of LC oscillating signals), and the master control module implements the timing control by sending an amplitude modulation communication signal COMM preset by a system to the communication circuit module. In fig. 2, the oscillation amplitude is high in the wireless charging process at the positions marked with AC1 and AC2, and in order to improve the voltage withstanding characteristic and the rectification efficiency of the device, the third MOS transistor M3 and the fourth MOS transistor M4 both use MOS transistors with large breakdown voltage, large on-off voltage and small on-resistance, that is, the drains of the MOS transistors of the third MOS transistor M3 and the fourth MOS transistor M4(D) And a breakdown voltage V between the source electrode (S)dsHigher (breakdown voltage V)dsMean when VgsWhen the voltage is equal to 0, the maximum voltage that the drain (D) and the source (S) of the MOS transistor can bear, the breakdown voltage VdsThe larger the voltage withstanding value of the semi-synchronous rectification circuit is, the better the voltage withstanding characteristic of the receiving device is), and the turn-on and turn-off voltage V between the grid (G) stage and the source (S) stage of the MOS tubegsIs also higher (turn-on-off voltage V)gsThe maximum voltage which can be borne is also provided, the larger the turn-on/turn-off voltage Vgs is, the larger the withstand voltage value of the LC semi-synchronous rectification circuit is, the better the withstand voltage characteristic of the receiving device is), but the on-resistance R when the drain electrode (D) and the source electrode (S) of the MOS transistor are completely conducted isdsIs required to be small (on-resistance R)dsThe smaller the losses during semi-synchronous rectification).
In the above embodiment, the apparatus further includes:
the low-voltage-difference linear output control module is respectively connected with the wireless charging electric energy receiving module and the main control module, and the main control module controls the low-voltage-difference linear output control module to convert the rectified voltage RECT into fixed output voltage;
and the load switching control module is connected with the main control module and the low-dropout linear output control module.
When the main control module controls the low dropout linear output control module to output a certain fixed output voltage, the load switching control module can be adjusted to a resistance value corresponding to the fixed output voltage. The load switching control module comprises a plurality of preset optional load resistors, and the main control module only needs to select the corresponding load resistors according to the fixed output voltage needing to be output. And the fixed output voltage output by the low-dropout linear output control module is loaded for a load resistor in the load switching control module.
In the above embodiment, the low dropout linear output control module includes the comparator U3A, the fifth MOS transistor M5, the second resistor R2, the third resistor R3, the eleventh capacitor C11 and the voltage feedback unit, in this embodiment, a PMOS transistor is selected as the fifth MOS transistor M5, and the specific structure of the low dropout linear output control module is shown in fig. 4;
the inverting input terminal of the comparator U3A is connected to the master control module through the third resistor R3, the master control module sends an adjustment control signal PWMref to the inverting input terminal of the comparator U3A for adjusting the comparison voltage reference voltage REFout, and the inverting input terminal of the comparator U3A is grounded through the eleventh capacitor C11;
the output end of the comparator U3A is connected with the gate of the fifth MOS transistor M5,
the source end of the fifth MOS transistor M5 is directly connected to the rectified voltage RECT, and the gate of the fifth MOS transistor M5 is connected to the rectified voltage RECT through the second resistor R2;
the first end of the voltage feedback unit is connected with the drain terminal of the fifth MOS transistor M5 and the substrate, the first end of the voltage feedback unit is used for outputting the fixed output voltage Vout, the second end of the voltage feedback unit is connected with the non-inverting input terminal of the comparator U3A, and the third end of the voltage feedback unit is grounded;
the comparator U3A compares the feedback voltage FBvout transmitted by the fixed output voltage Vout with the reference voltage REFout of the comparison voltage to control the gate of the fifth MOS transistor M5, and performs automatic switching control on the fifth MOS transistor M5, thereby implementing the closed-loop control of the low dropout linear output control module.
In the above embodiments, 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;
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 form the first end of the voltage feedback unit;
a second end of the fourth resistor R4 is connected to a first end of the fifth resistor R5;
a second end of the twelfth capacitor C12 is connected to a connection point of the fourth resistor R4 and the fifth resistor R5; a second end of the twelfth capacitor C12 constitutes a second end of the voltage feedback unit;
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 jointly form the third end of the voltage feedback unit.
The low dropout linear output control module converts an input rectified voltage RECT of the module into a fixed output voltage Vout. In the actual work of the circuit, the low dropout linear output control module (LDO output control module) outputs different fixed output voltages Vout according to the actual requirements of the device applied to the detection of the wireless charging device (the voltage value of the fixed output voltage can be preset according to the actual requirements, and the general fixed output voltage can be set to two voltage conditions of 5V and 9V), the output fixed output voltage is loaded by the selected load in the load switching control module, and the voltage value of the output fixed output voltage is determined by the control signal provided by the main control module.
In the above embodiment, the apparatus further includes:
the temperature sensor module is used for periodically acquiring the temperatures of the device and the environment and feeding back the acquired information of the temperatures of the device and the environment to the main control module so as to realize the monitoring of the temperature rise data in the detection process by the device; the temperature sensor module can be composed of a plurality of NTC resistors, and the number of the NTC resistors is consistent with the number of the temperature points to be measured.
A digital-to-analog converter voltage and current acquisition module (also referred to as ADC voltage and current acquisition module) respectively connected to the wireless charging power receiving module, the low dropout linear output control module and the main control module, for monitoring voltage and current data at each point in the detection process, and specifically for acquiring data of voltage and current signals such as output current generated when the rectified voltage RECT, the fixed output voltage Vout, the feedback voltage FBvout transmitted to the comparator by the feedback unit in the low dropout linear output control module and the fixed output voltage Vout are loaded to the load in the load switching control module.
The data recording module is connected with the main control module and used for recording data in the detection process, and a flash circuit (flash memory circuit) can be adopted to form the data recording module;
and the data display module is connected with the main control module and used for displaying the data in the detection process, and a nixie tube circuit can be adopted to form the data display module.
The data transmission module is connected with the main control module and used for transmitting the data in the detection process to external equipment (the external equipment can be printout or other equipment capable of processing the data, such as computer energy equipment), a UART (universal asynchronous receiver transmitter) circuit can be adopted to form the data transmission module, and the data transmission module can transmit the data in the detection process to external storage equipment.
In the above embodiment, the temperature of the apparatus includes the temperature of the PCBA board carrying all the devices in the apparatus and the temperature of the receiving coil L1. The PCBA board is formed by the fact that all modules on the whole device are arranged on the PCBA board, and the PCBA board is a carrier connected among all components in the device.
In the above embodiment, the apparatus further includes a power generation module for providing a voltage source for the main control module.
In the above embodiment, the power generation module is a dual-redundancy power control circuit module, the dual-redundancy power control circuit module includes an external input power unit and a rectified voltage generation power unit, the external input power unit and the rectified voltage generation power unit are both connected to the main control module, and the rectified voltage generation power unit is further connected to the wireless charging power receiving module. In the working process of the dual-redundancy power supply control circuit module, the external input power supply unit can supply power to the control module in the device and other modules in the device to provide a digital power supply VDD, and can also obtain the digital power supply VDD from the rectified voltage generation power supply unit to enable the control module and other modules in the device to normally work, so that in the testing process, the external input power supply unit can enable the main control module and related auxiliary modules to keep functions of data recording, monitoring and the like under the condition that the rectified voltage generation power supply unit cannot provide power for the device. The digital power supply VDD provided by the rectified voltage generating power supply unit is converted from the rectified voltage RECT. Under normal conditions, the rectified voltage generation power supply unit can provide a digital power supply VDD for a control module in the device and other modules in the device, but when a large-batch receiving device is combined with a factory aging rack system and an upper computer is connected to monitor an aging process, the digital power supply VDD needs to be provided through an external input power supply unit, and the external input power supply unit provides a backup power supply for the device applied to wireless charging equipment detection.
In the above embodiment, the apparatus applied to the detection of the wireless charging device includes a main control module, a communication circuit module, a low dropout 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 rectified voltage generation power supply unit (also referred to as a rectified voltage RECT output generation unit), a data recording module, a data transmission module, an auxiliary switching control module, and an LC semi-synchronous rectification module. The receiving coil L1 is connected to the LC semi-synchronous rectification module and the communication circuit module, and the specific connection relationship can be shown in fig. 4, and the apparatus for detecting wireless charging equipment in this embodiment can be applied to the function and aging test of the Qi standard wireless charging equipment.
The method for realizing the detection of the wireless charging equipment based on the device applied to the detection of the wireless charging equipment in the embodiment comprises the following steps:
(1) the main control module performs time sequence control on the wireless charging electric energy receiving module to control the wireless charging electric energy receiving module to realize the electric energy receiving operation, and the method specifically comprises the following operation steps:
(1.1) the master control module sends an amplitude modulation communication signal preset by a system to the communication circuit module;
(1.2) the communication circuit module sends a communication packet containing a system preset protocol to the wireless charging electric energy receiving module according to the system preset amplitude modulation communication signal;
(1.3) the wireless charging electric energy receiving module communicates with external wireless charging equipment to be tested according to the communication packet to realize electric energy receiving;
(2) the main control module controls the temperature sensor module to periodically acquire the temperature of the device and the environment and is used for acquiring temperature rise data in the test process; the main control module controls the digital-to-analog converter voltage and current acquisition module to measure voltage and current data of each point in the detection process, and the voltage and current data are used for acquiring voltage and current data in the test process; and the main control module monitors the interruption times and interruption reasons in the test process and is used for acquiring interruption data in the test process.
The main control module monitors the interruption times and the interruption reasons in the test process and comprises the following steps:
(a1) when the wireless charging electric energy receiving module starts to receive electric energy for the first time, the main control module starts to monitor the test process;
(a2) the master control module monitors whether the wireless charging electric energy receiving module has connection interruption in the electric energy receiving process;
(a3) if the connection interruption occurs, continuing the subsequent step (a4), otherwise, returning to the step (a2) until the test is finished;
(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, and provides a basis for judging the interruption reason;
(a5) and (c) counting the interruption times recorded in the main control module by one, and returning to the step (a 1).
(3) The data recording module stores the temperature rise data and the voltage and current data;
(4) the data transmission module transmits the temperature rise data, the voltage data and the current data to the data display module;
(5) and the data display module displays the temperature rise data and the voltage and current data.
(6) And the data transmission module transmits the temperature rise data, the interruption data, the voltage data and the current data to external equipment.
The device applied to the detection of the wireless charging equipment and the corresponding method in the embodiment adopt the dual-redundancy power supply control circuit module to form the power supply generation module, the dual-redundancy power supply control circuit module comprises an external input power supply unit and a rectified voltage generation power supply unit, the port connection between the wireless charging equipment and the device in the test process can be realized, the main control module can well keep the data recording and transmission capacity, and the function of monitoring the interruption reason, the interruption times, the coil temperature rise data and the like in the test process in the whole time period is realized. The device applied to the detection of the wireless charging equipment in the embodiment comprises a data transmission module and a data recording module, so that a user can select a data offline or online recording mode in a customized manner according to different available modes. Compared with the detection device formed by the integrated System On Chip (SOC) in the prior art, the device applied to the detection of the wireless charging equipment in the embodiment has the advantages of longer service life, better voltage resistance, better temperature rise characteristic and more suitability for aging test.
The device and the corresponding method applied to the detection of the wireless charging equipment can effectively realize the detection of the wireless charging equipment, and the main control module and the wireless charging electric energy receiving module are of a separated structure, so the device has the characteristics of high temperature resistance and high voltage resistance, the service life of the device is longer, the main control module in the device can collect and record data in the detection process, the fault analysis of the fault occurring in the detection process can be more conveniently carried out, and when the device adopts the dual-redundancy power supply control circuit module as the power supply generation module to supply power to the main control module by a voltage source, a standby power supply can be provided for the equipment when one power supply fails, the power failure of the main control module is prevented, and the main control module can keep the data recording and data transmission capabilities. The device and the corresponding method applied to the detection of the wireless charging equipment have the characteristics of convenience in operation, high reliability and long service life, and can well detect the wireless charging equipment.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (15)
1. An apparatus for detecting a wireless charging device, the apparatus comprising:
the wireless charging electric energy receiving module comprises a receiving coil and a control module, wherein the receiving coil is used for receiving electric energy in the detection process and converting the voltage received by the receiving coil into rectified voltage;
the main control module is used for carrying out time sequence control on the wireless charging electric energy receiving module in the detection process and controlling the working state of the device in the detection process;
the main control module and the wireless charging electric energy receiving module are of a separated structure.
2. The device for detecting the wireless charging equipment according to claim 1, wherein the main control module is connected with the wireless charging power receiving module through a communication circuit module; the communication circuit module is a Qi standard communication module.
3. The device applied to the detection of the wireless charging equipment according to claim 2, wherein the communication circuit module comprises a first MOS transistor, a second MOS transistor, a first capacitor, a second capacitor and a first resistor;
the drain electrode of the first MOS tube is connected with the first end of the first capacitor, and the source electrode of the first MOS tube is grounded;
the drain electrode of the second MOS tube is connected with the first end of the second capacitor, and the source electrode of the second MOS tube is grounded;
the grid electrode of the first MOS tube and the grid electrode of the second MOS tube are both connected with the first end of the first resistor, and the second end of the first resistor is grounded;
the communication circuit module is connected with the wireless charging electric energy receiving module through the second end of the first capacitor and the second end of the second capacitor;
the communication circuit module is connected with the main control module through the first end of the first resistor.
4. The device applied to the detection of the wireless charging equipment as claimed in claim 3, wherein the wireless charging power receiving module is an LC semi-synchronous rectification module;
the LC semi-synchronous rectification module comprises a first capacitor bank unit, a second capacitor bank unit, a third MOS (metal oxide semiconductor) tube, a fourth MOS tube, a voltage stabilizing diode, a first diode and a second diode;
the drain electrode of the third MOS tube is respectively connected with the grid electrode of the fourth MOS tube, the first end of the first capacitor bank unit, the first end of the second capacitor bank unit and the anode of the first diode;
the second end of the first capacitor bank unit is connected with the first end of the receiving coil;
the drain electrode of the fourth MOS tube is respectively connected with the grid electrode of the third MOS tube, the second end of the second capacitor bank unit, the second end of the receiving coil and the anode of the second diode;
the source electrode of the third MOS tube and the source electrode of the fourth MOS tube are both grounded;
the first end of the third capacitor bank unit is simultaneously connected with the cathode of the first diode, the cathode of the second diode and the cathode of the voltage stabilizing diode;
the second end of the third capacitor bank unit is connected with 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 bank unit is connected with the second end of the first capacitor in the communication circuit module, and the second end of the second capacitor bank unit is connected with the second end of the second capacitor in the communication circuit module.
5. The apparatus applied to wireless charging device detection according to claim 4,
the first capacitor bank unit comprises a third capacitor, a fourth capacitor and a fifth capacitor, wherein a first end of the third capacitor, a first end of the fourth capacitor and a first end of the fifth capacitor form a first end of the first capacitor bank unit, and a second end of the third capacitor, a second end of the fourth capacitor and a second end of the fifth capacitor form a second end of the first capacitor bank unit;
the second capacitor bank unit comprises a sixth capacitor and a seventh capacitor, a first end of the sixth capacitor and a first end of the seventh capacitor jointly form a first end of the second capacitor bank unit, and a second end of the sixth capacitor and a second end of the seventh capacitor jointly form a second end of the second capacitor bank unit;
the third capacitor bank unit comprises an eighth capacitor, a ninth capacitor and a tenth capacitor, wherein the first end of the eighth capacitor, the first end of the ninth capacitor and the first end of the tenth capacitor form the first end of the third capacitor bank unit together, and the second end of the eighth capacitor, the second end of the ninth capacitor and the second end of the tenth capacitor form the second end of the third capacitor bank unit together.
6. The apparatus as claimed in claim 1, wherein the apparatus further comprises:
the low-voltage-difference linear output control module is respectively connected with the wireless charging electric energy receiving module and the main control module, and the main control module controls the low-voltage-difference linear output control module to convert the rectified voltage into fixed output voltage;
and the load switching control module is connected with the main control module and the low-dropout linear output control module.
7. The device applied to the detection of the wireless charging equipment according to claim 6, wherein the low dropout linear output control module comprises a comparator, a fifth MOS transistor, a second resistor, a third resistor, an eleventh capacitor and a voltage feedback unit;
the negative input end of the comparator is connected with the master control module through the third resistor, the master control module sends an adjusting control signal to the negative input end of the comparator, and the negative input end of the comparator is grounded through the eleventh capacitor;
the output end of the comparator is connected with the grid electrode of the fifth MOS tube;
the source end of the fifth MOS tube is directly connected with the rectified voltage, and the grid electrode of the fifth MOS tube is connected with the rectified voltage through the second resistor;
the drain terminal of the fifth MOS tube is connected with the first terminal of the voltage feedback unit, the first terminal of the voltage feedback unit outputs the fixed output voltage, the second terminal of the voltage feedback unit is connected with the non-inverting input terminal of the comparator, and the third terminal of the voltage feedback unit is grounded;
the voltage feedback unit comprises 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 jointly form the first end of the voltage feedback unit;
the second end of the fourth resistor is connected with the first end of the fifth resistor;
the second end of the twelfth capacitor is connected with the joint of the fourth resistor and the fifth resistor; the second end of the twelfth capacitor forms the second end of the voltage feedback unit;
and the second end of the fifth resistor, the second end of the twelfth capacitor and the second end of the thirteenth capacitor jointly form a third end of the voltage feedback unit.
8. The apparatus as claimed in claim 6, wherein the apparatus further comprises:
the temperature sensor module is used for periodically acquiring the temperatures of the device and the environment and feeding back the acquired information of the temperatures of the device and the environment to the main control module so as to realize the monitoring of the temperature rise data in the detection process by the device;
the digital-to-analog converter voltage and current acquisition module is respectively connected with the wireless charging electric energy receiving module, the low-voltage-difference linear output control module and the main control module and is used for monitoring voltage and current data of each point in the detection process by the device;
the data recording module is connected with the main control module and is used for recording data in the detection process;
the data display module is connected with the main control module and is used for displaying the data in the detection process;
and the data transmission module is connected with the main control module and is used for transmitting the data in the detection process to external equipment.
9. The device as claimed in claim 8, wherein the temperature of the device comprises a PCBA board for carrying all devices in the device and a temperature of the receiving coil.
10. The device for detecting the wireless charging equipment according to claim 1, further comprising a power generation module for providing a voltage source for the main control module;
the power generation module is a dual-redundancy power control circuit module, the dual-redundancy power control circuit module comprises an external input power unit and a rectified voltage generation power unit, the external input power unit and the rectified voltage generation power unit are both connected with the main control module, and the rectified voltage generation power unit is also connected with the wireless charging electric energy receiving module.
11. The device as claimed in claim 1, wherein the main control module is a micro control unit, and the micro control unit is STM 32.
12. The method for detecting the wireless charging device based on the device of any one of claims 1 to 11, wherein the device comprises a temperature sensor module and a digital-to-analog converter voltage and current acquisition module, and the method comprises the following steps:
(1) the master control module carries out time sequence control on the wireless charging electric energy receiving module and controls the wireless charging electric energy receiving module to realize the electric energy receiving operation;
(2) the main control module controls the temperature sensor module to periodically acquire the temperature of the device and the environment and is used for acquiring temperature rise data in the test process; the main control module controls the digital-to-analog converter voltage and current acquisition module to measure voltage and current data of each point in the detection process, and the voltage and current data are used for acquiring voltage and current data in the test process; and the main control module monitors the interruption times and interruption reasons in the test process and is used for acquiring interruption data in the test process.
13. The method as claimed in claim 12, wherein the step of the main control module monitoring the number of interrupts and the cause of the interrupts in the test process comprises the steps of:
(a1) when the wireless charging electric energy receiving module starts to receive electric energy for the first time, the main control module starts to monitor the test process;
(a2) the master control module monitors whether the wireless charging electric energy receiving module has connection interruption in the electric energy receiving process;
(a3) if the connection interruption occurs, continuing the subsequent step (a4), otherwise, returning to the step (a2) until the test is finished;
(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, and provides a basis for judging the interruption reason;
(a5) and (c) counting the interruption times recorded in the main control module by one, and returning to the step (a 1).
14. The method for detecting the wireless charging device according to claim 12, wherein the apparatus comprises a data display module and a data recording module, and the method further comprises the following steps after the step (2):
(3) the data recording module stores the temperature rise data, the interruption data, the voltage data and the current data;
(4) the main control module transmits the temperature rise data, the interruption data, the voltage data and the current data to the data display module;
(5) and the data display module displays the temperature rise data, the interruption data and the voltage and current data.
15. The method for detecting the wireless charging device according to claim 14, wherein the apparatus includes a data transmission module, and the step (5) further includes the following steps:
(6) and the data transmission module transmits the temperature rise data, the interruption data, the voltage data and the current data to external equipment.
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| CN201811465372.6A CN111257662A (en) | 2018-12-03 | 2018-12-03 | Device and corresponding method applied to wireless charging equipment detection |
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| CN201811465372.6A CN111257662A (en) | 2018-12-03 | 2018-12-03 | Device and corresponding method applied to wireless charging equipment detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022041018A1 (en) * | 2020-08-26 | 2022-03-03 | 华为技术有限公司 | Wireless charging receiving circuit, terminal device and wireless charging system |
| CN114265766A (en) * | 2021-12-03 | 2022-04-01 | 湖南炬神电子有限公司 | Programmable multifunctional test system and method integrating PD rapid charging protocol |
-
2018
- 2018-12-03 CN CN201811465372.6A patent/CN111257662A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022041018A1 (en) * | 2020-08-26 | 2022-03-03 | 华为技术有限公司 | Wireless charging receiving circuit, terminal device and wireless charging system |
| CN114265766A (en) * | 2021-12-03 | 2022-04-01 | 湖南炬神电子有限公司 | Programmable multifunctional test system and method integrating PD rapid charging protocol |
| CN114265766B (en) * | 2021-12-03 | 2023-02-21 | 湖南炬神电子有限公司 | Programmable multifunctional test system and method integrating PD rapid charging protocol |
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