阅读说明：本技术 一种兼容多种输出电压的pd电源适配器及其充电方法 (PD power adapter compatible with various output voltages and charging method thereof ) 是由 吴科兴 于 2021-01-19 设计创作，主要内容包括：本发明公开了一种兼容多种输出电压的PD电源适配器,涉及供电设备技术领域,旨在解决电源适配器仅能输出一种稳定的电压,并不能兼容多种电压,不具有广泛的适用性的技术问题,其技术方案要点是包括壳体,所述壳体内部设置有MCU、变压模块、整流模块、滤波模块、稳压芯片和调压模块；所述变压模块、整流模块、滤波模块、稳压芯片顺次连接,所述MCU设置有用于检测用电设备供电电压的检测模块,所述稳压芯片与调压模块之间设置有受控于MCU以控制调压模块启停的控制单元,所述调压模块用于受控于供电电压以输出对应的电压值。达到了具有减小检测器检测时发生歪斜的几率以提高检测器检测精确度的效果。(The invention discloses a PD power adapter compatible with various output voltages, which relates to the technical field of power supply equipment and aims to solve the technical problems that the power adapter can only output one stable voltage, cannot be compatible with various voltages and does not have wide applicability; the voltage-regulating circuit comprises a voltage-transforming module, a rectifying module, a filtering module and a voltage-regulating chip, wherein the voltage-transforming module, the rectifying module, the filtering module and the voltage-regulating chip are connected in sequence, the MCU is provided with a detection module for detecting the power supply voltage of the electric equipment, a control unit controlled by the MCU to control the voltage-regulating module to start and stop is arranged between the voltage-regulating chip and the voltage-regulating module, and the voltage-regulating module is used for being controlled by the power. The effect of reducing the probability of the detector being skewed during detection so as to improve the detection accuracy of the detector is achieved.)

1. A PD power adapter of compatible multiple output voltage characterized by that: the device comprises a shell (1), wherein an MCU (2), a voltage transformation module (21), a rectification module (22), a filtering module (23), a voltage stabilization chip (24) and a voltage regulation module (25) are arranged in the shell (1); the voltage regulation device is characterized in that the voltage transformation module (21), the rectification module (22), the filtering module (23) and the voltage regulation chip (24) are sequentially connected, the MCU (2) is provided with a detection module (26) for detecting the power supply voltage of the electric equipment, a control unit (27) controlled by the MCU (2) to control the voltage regulation module (25) to start and stop is arranged between the voltage regulation chip (24) and the voltage regulation module (25), and the voltage regulation module (25) is used for being controlled by the power supply voltage to output a corresponding voltage value.

2. The PD power adapter of claim 1, which is compatible with multiple output voltages, characterized in that: the MCU (2) is provided with a voltage measuring module (28) for detecting the residual voltage of the electric equipment, the MCU (2) is further provided with a timing module (29) for measuring the voltage holding time of the voltage measuring module (28), and the MCU (2) is provided with a switch module (20) which is connected to the timing module (29) to respond to the timing time to control the start and stop of the control unit (27).

3. The PD power adapter of claim 1, which is compatible with multiple output voltages, characterized in that: casing (1) one end is provided with commercial power input line (3), the one end that casing (1) is close to commercial power input line (3) is provided with and is used for supplying commercial power transmission line around bobbin (4) of establishing, the one end that casing (1) were kept away from in bobbin (4) is provided with limit baffle (41), be provided with fixing device (5) that are used for fixed commercial power input line (3) on bobbin (4).

4. The PD power adapter of claim 2, which is compatible with multiple output voltages, characterized in that: the fixing device (5) comprises limiting plates (51) rotatably connected to two sides of the shell (1) in the width direction, supporting rods (52) arranged on the limiting baffle plates (41), and abutting plates (53) rotatably connected to the supporting rods (52); one side of the limiting baffle (41) far away from the supporting rod (52) is provided with a slot (411) for inserting the abutting plate (53), and the surface of the limiting plate (51) facing the bobbin (4) is provided with an abutting reed (511).

5. The PD power adapter compatible with multiple output voltages of claim 4, characterized in that: the limiting baffle (41) is located in the slot (411) and is provided with a fixing hole (42), the abutting plate (53) is located in the fixing hole (42) and is provided with a locking hole (531), and a positioning rod (54) is inserted into the fixing hole (42) and the locking hole (531) together.

6. The PD power adapter of claim 1, which is compatible with multiple output voltages, characterized in that: one end, far away from the abutting plate (53), of the positioning rod (54) is provided with a supporting plate (55), a magnetic part (551) is arranged on the surface, facing the limiting baffle (41), of the supporting plate (55), an adsorption part (412) is arranged on the surface, facing the magnetic part (551), of the limiting baffle (41), and one side, back to the limiting baffle (41), of the supporting plate (55) is rotatably connected with an operating ring (552).

7. The PD power adapter of claim 6, which is compatible with multiple output voltages: one end of the bobbin (4) close to the shell (1) is provided with a temperature detection device (11), the temperature detection device (11) is connected to the MCU (2), and the MCU (2) is connected with a cooling fan (12) installed in the bobbin (4).

8. The PD power adapter of claim 6, which is compatible with multiple output voltages: bobbin (4) lateral wall is provided with heat dissipation strip hole (43), casing (1) inside evenly is provided with cooling tube (13), the one end that cooling tube (13) are located casing (1) and are close to radiator fan (12) is provided with heat-conducting plate (14).

9. The PD power adapter of claim 6, which is compatible with multiple output voltages: radiating oil is arranged in the radiating pipe (13), and a booster pump (16) for promoting the circulating flow of the radiating oil is connected in series in the radiating pipe (13).

10. A PD power adapter charging method compatible with multiple output voltages as recited in any one of claims 1-9, wherein: comprises the following steps:

s100, connecting a commercial power input end of a power adapter to a commercial power grid, and connecting an output end of the power adapter to electric equipment;

s200, detecting the voltage value of the electric equipment by a detection module (26) of the MCU (2);

s300, testing the voltage of the electric equipment by a voltage measuring module (28) of the MCU (2);

s400, when the electric equipment is battery-free equipment, continuously supplying power to the electric equipment; when the electric equipment is storage battery equipment, a storage battery of the electric equipment is charged, timing is started when the voltage of the electric equipment is not changed any more, and power supply to the electric equipment is suspended after a preset time is reached.

Technical Field

The invention relates to the technical field of power supply equipment, in particular to a PD power adapter compatible with various output voltages.

Background

The power adapter is a power supply conversion device of small portable electronic equipment and electronic appliances, and converts alternating current input into direct current output; the device can be divided into a wall-inserting type and a desktop type according to the connection mode, and can be widely matched with equipment such as security cameras, set top boxes, routers, light bars, massage instruments and the like. A PD power adapter is a power adapter with a PD protocol.

The current chinese patent of No. CN108418399B of granting discloses a power adapter, and it includes the power shell body, and the inside of power shell body has one and holds the chamber, holds the intracavity and embeds a unsettled mainboard, and the one end of mainboard is power input end, the other end power output end of mainboard, sets up four heat pipes in the power shell body, forms a mounting chamber in the middle of four heat pipes, and four angular position of mainboard are installed respectively in the mounting chamber of four heat pipes. This power adapter simple structure installs the mainboard unsettled in the inside of power shell body, increases the heat dispersion of mainboard to and the resistance to compression buffer capacity who increases the mainboard, do not use inside heat abstractor, simplify the structure, increase the waterproof performance of outdoor use.

The above prior art solutions have the following drawbacks: the power adapter can only output one stable voltage, cannot be compatible with various voltages, does not have wide applicability, and therefore needs to be improved.

Disclosure of Invention

In view of the defects in the prior art, an object of the present invention is to provide a PD power adapter compatible with multiple output voltages, which has the advantage of reducing the probability of skew occurring during detection by a detector to improve the detection accuracy of the detector.

The above object of the present invention is achieved by the following technical solutions:

a PD power adapter of compatible multiple output voltage characterized by that: the circuit comprises a shell, wherein an MCU, a voltage transformation module, a rectification module, a filtering module, a voltage stabilizing chip and a voltage regulating module are arranged in the shell; the voltage-regulating circuit comprises a voltage-transforming module, a rectifying module, a filtering module and a voltage-regulating chip, wherein the voltage-transforming module, the rectifying module, the filtering module and the voltage-regulating chip are connected in sequence, the MCU is provided with a detection module for detecting the power supply voltage of the electric equipment, a control unit controlled by the MCU to control the voltage-regulating module to start and stop is arranged between the voltage-regulating chip and the voltage-regulating module, and the voltage-regulating module is used for being controlled by the power.

Through adopting above-mentioned technical scheme, alternating current power supply supplies power for MCU after vary voltage, rectification, filtering and steady voltage, MCU's steady voltage detection module detects the supply voltage of consumer and transmits MCU for, MCU gives the voltage regulating module with signal transmission for the direct current voltage that voltage regulating module output and consumer suited, thereby make power adapter can be adapted to different consumers.

The invention is further configured to: the MCU is provided with a voltage measuring module for detecting the residual voltage of the electric equipment, the MCU is also provided with a timing module for measuring the voltage holding time of the voltage measuring module, and the MCU is provided with a switch module which is connected with the timing module to respond to the timing time to control the start and stop of the control unit.

Through adopting above-mentioned technical scheme, voltage detection module is convenient for detect the voltage of consumer, be used for the battery when charging, its output voltage can be in the state that continuously rises always, and after its completion of charging, voltage can remain relatively stable, and MCU's voltage detection module detects the battery voltage of consumer, when the output voltage of battery no longer continuously rises outside scheduled time, the disconnection of control switch module, thereby no longer for the consumer supplies power, thereby guaranteed the charge time to the consumer, the damage that the battery caused has effectively been reduced to overcharging.

The invention is further configured to: casing one end is provided with the commercial power input line, the one end that the casing is close to the commercial power input line is provided with and is used for supplying the commercial power transmission line to wind the bobbin of establishing, the one end that the casing was kept away from to the bobbin is provided with limit baffle, be provided with the fixing device who is used for fixed commercial power input line on the bobbin.

Through adopting above-mentioned technical scheme, the setting up of bobbin is convenient for wind the commercial power input line and establish on the bobbin to be convenient for carry out appropriate accomodating to the commercial power input line, prevent on the one hand that the commercial power input line is in disorder to lead to the fracture damage, on the other hand can prevent that the commercial power input line from losing.

The invention is further configured to: the fixing device comprises limiting plates rotatably connected to two sides of the shell in the width direction, supporting rods arranged on the limiting baffle plates and abutting plates rotatably connected to the supporting rods; one side of the limiting baffle far away from the supporting rod is provided with a slot for the abutting plate to be inserted, and an abutting reed is arranged on the surface of the limiting plate facing the bobbin.

By adopting the technical scheme, the limiting plates which are rotatably connected to the two sides of the shell are used for abutting and fixing the commercial power input line wound on the bobbin; the abutting plate rotatably connected to the supporting rod on the limiting baffle is rotated into the slot so as to abut the limiting plate; because spacing reed on the limiting plate carries out the butt to the commercial power input line fixedly on the one hand, on the other hand butt reed can produce the effort of a perpendicular to limiting plate to can carry out the effect of fixing to the limiting plate with the limiting plate butt on the lateral wall of slot.

The invention is further configured to: the limiting baffle is located at the slot and is provided with a fixing hole, the abutting plate is located at the fixing hole and is provided with a locking hole, and the fixing hole and the locking hole are internally and jointly inserted with a positioning rod.

Through adopting above-mentioned technical scheme, insert the locating lever of establishing in fixed orifices and the locking hole and can restrict the rotation of butt joint board on slot width direction to prevent that butt joint board from deviating from the slot.

The invention is further configured to: the one end that the butt joint board was kept away from to the locating lever is provided with the backup pad, the backup pad is provided with the magnetic part towards limit baffle on the surface, limit baffle is provided with the absorption piece towards the surface of magnetic part, one side rotation that the backup pad is kept away from limit baffle is connected with the operating ring.

Through adopting above-mentioned technical scheme, the magnetism spare in the backup pad adsorbs with the absorption piece on the limit baffle mutually to can fix the locating lever on limit baffle, the operating ring is convenient for pull out or insert in fixed orifices and locking hole the locating lever, thereby is more convenient for fix the butt joint board.

The invention is further configured to: one end of the bobbin, which is close to the shell, is provided with a temperature detection device, the temperature detection device is connected with the MCU, and the MCU is connected with a cooling fan installed in the bobbin.

By adopting the technical scheme, the temperature detection device detects the temperature of the winding pipe and transmits data to the MCU, and the MCU controls the heat dissipation fan to rotate when the temperature exceeds a preset value, so that the heat dissipation of the electric wire on the winding pipe is promoted; meanwhile, the heat radiation fan is arranged at one end of the shell, and can promote heat radiation of the end wall of the shell.

The invention is further configured to: the bobbin lateral wall is provided with heat dissipation strip hole, the inside cooling tube that evenly is provided with of casing, the one end that the cooling tube is located the casing and is close to radiator fan is provided with the heat-conducting plate.

By adopting the technical scheme, the arrangement of the radiating strip holes is convenient for heat on the commercial power input line to be conducted into the bobbin, so that the radiating fan is convenient for radiating heat; the cooling tube can conduct the heat in the casing, conduct to the heat-conducting plate that the casing is close to radiator fan, and radiator fan outwards gives off the heat on the heat-conducting plate to the heat in the casing of being convenient for gives off.

The invention is further configured to: the radiating pipe is internally provided with radiating oil, and a booster pump for promoting the circulating flow of the radiating oil is connected in series in the radiating pipe.

Through adopting above-mentioned technical scheme, the setting of heat dissipation oil is convenient for conduct the inside heat of casing to the heat dissipation oil through the cooling tube in, and the setting of booster pump is convenient for promote the heat dissipation oil and constantly circulate to heat-conducting plate department to the heat that the inside components and parts of promotion casing produced outwards gives off.

The second objective of the present invention is to provide a PD power adapter compatible with multiple output voltages, which has the advantage of reducing damage to the battery caused by overcharge.

The above object of the present invention is achieved by the following technical solutions: comprises the following steps:

s100, connecting a commercial power input end of a power adapter to a commercial power grid, and connecting an output end of the power adapter to electric equipment;

s200, detecting the voltage value of the electric equipment by a detection module of the MCU;

s300, testing the voltage of the electric equipment by a voltage measuring module of the MCU;

s400, when the electric equipment is battery-free equipment, continuously supplying power to the electric equipment; when the electric equipment is storage battery equipment, a storage battery of the electric equipment is charged, timing is started when the voltage of the electric equipment is not changed any more, and power supply to the electric equipment is suspended after a preset time is reached.

By adopting the technical scheme, when the electric equipment is battery-free equipment, the electric equipment is continuously powered; when the electric equipment is a storage battery, the time of voltage change is measured, and when the output voltage of the electric equipment is kept unchanged within the preset time, the power adapter is controlled to stop charging the storage battery of the electric equipment, so that damage caused by over-charging of the storage battery is prevented.

In conclusion, the beneficial effects of the invention are as follows:

1. the MCU, the voltage transformation module, the rectification module, the filtering module, the voltage stabilizing chip, the voltage regulating module, the control unit, the voltage measuring module, the timing module and the switch module are matched, so that the effect of automatically being compatible with different electric equipment voltages is achieved;

2. the technology that the bobbin, the limit baffle, the limit plate, the support rod, the abutting plate, the slot, the abutting reed, the fixing hole, the locking hole and the locating rod are matched is adopted, so that the effect of reasonably containing the mains supply input line is achieved;

3. the temperature detection device, the cooling fan, the cooling bar hole, the cooling tube, the heat conducting plate, the cooling oil and the booster pump are matched, so that the effect of conveniently radiating the heat inside the shell outwards is achieved.

Drawings

FIG. 1 is a schematic diagram of an overall structure of a PD power adapter compatible with multiple output voltages in an embodiment;

FIG. 2 is a schematic diagram of another end structure of a PD power adapter compatible with multiple output voltages in the embodiment;

FIG. 3 is a block diagram of a PD power adapter compatible with various output voltages in an embodiment;

FIG. 4 is a top view of an embodiment showing a housing and a bobbin structure;

FIG. 5 is a schematic view illustrating an internal structure of the bobbin and the housing according to the embodiment;

FIG. 6 is a sectional view showing the structure of the locking hole and the fixing hole in the embodiment.

In the figure: 1. a housing; 11. a temperature detection device; 12. a heat radiation fan; 13. a radiating pipe; 14. a heat conducting plate; 15. a heat-conducting silica gel pad; 16. a booster pump; 2. MCU; 21. a voltage transformation module; 22. a rectification module; 23. a filtering module; 24. a voltage stabilization chip; 25. a voltage regulating module; 26. a detection module; 27. a control unit; 28. a voltage measurement module; 29. a timing module; 20. a switch module; 3. a mains supply input line; 4. a bobbin; 41. a limit baffle; 410. embedding a through groove; 411. a slot; 412. an adsorbing member; 42. a fixing hole; 43. a heat dissipating bar hole; 5. a fixing device; 51. a limiting plate; 511. abutting against the reed; 52. a support bar; 53. a butt joint plate; 531. a locking hole; 54. positioning a rod; 55. a support plate; 551. a magnetic member; 552. an operating ring; 5520. and (7) a supporting block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

a PD power adapter compatible with various output voltages refers to fig. 1, fig. 2 and fig. 3, and comprises a shell 1, wherein an MCU2, a transformation module 21, a rectification module 22, a filtering module 23, a voltage stabilizing chip 24 and a voltage regulating module 25 are arranged in the shell 1. The transformation module 21, the rectification module 22, the filtering module 23 and the voltage stabilization chip 24 are sequentially connected, and the transformation module 21 is a micro transformer with a transformation ratio of more than ten times; so that the range of input voltages can be between 100-240V. The rectifying module 22 is a four-wire rectifier, and the filtering module 23 is a filtering capacitor. The MCU2 is internally integrated with a PD quick-charging protocol, a QC2.0 protocol, a QC3.0 protocol and an APPLE charging protocol, and can be compatible with different charging modes.

Referring to fig. 3, the MCU2 is connected to a detection module 26 for detecting a power supply voltage of the electric device, and the detection module 26 is used to detect an input voltage of the electric device. The voltage stabilizing chip 24 is a voltage reducing chip, a control unit 27 controlled by the MCU2 to control the voltage regulating module 25 to start and stop is connected between the voltage stabilizing chip 24 and the voltage regulating module 25, the control unit 27 is a photoelectric coupler, the input end of the photoelectric coupler is connected to the MCU2, and the output end of the photoelectric coupler is connected to the voltage regulating module 25. The voltage regulating module 25 is controlled by a power supply voltage to output a corresponding voltage value, and the voltage regulating module 25 is a PWM switching power supply, so that the output voltage can be any one of five voltages, i.e., 5V, 9V, 12V, 15V, or 20V.

Referring to fig. 3, a voltage measurement module 28 for detecting the residual voltage of the electrical device is built in the MCU2, and the voltage measurement module 28 is an ADC port of the MCU 2; the MCU2 also has a timing module 29 built in it for measuring the voltage holding time of the voltage measuring module 28, the MCU2 is provided with a switch module 20 connected to the timing module 29 for controlling the on/off of the control unit 27 in response to the timing time, and the switch module 20 is an electromagnetic relay for stopping the operation of the power adapter after the battery is fully charged. The MCU2 is connected with an overload protection device for preventing the power adapter from being damaged by overload.

Referring to fig. 4, a commercial power input line 3 is fixedly bonded to one end of the housing 1, and a plug is connected to one end of the commercial power input line 3 away from the housing 1. One end of the shell 1 close to the commercial power input line 3 is integrally formed with a bobbin 4 for winding the commercial power transmission line, and the bobbin 4 is a square hollow tube. The end of the bobbin 4 far away from the casing 1 is integrally formed with a limit baffle 41, and the commercial power input line 3 is wound between the casing 1 and the limit baffle 41.

Referring to fig. 5 and 6, the bobbin 4 is provided with a fixing device 5 for fixing the commercial power input line 3, and the fixing device 5 includes a position limiting plate 51 rotatably connected to both sides of the housing 1 in the width direction along the length direction of the housing 1, a supporting rod 52 integrally formed on the position limiting baffle 41, and an abutting plate 53 rotatably connected to the supporting rod 52. The slot 411 that supplies the butt plate 53 to insert is seted up to the one side that limit baffle 41 kept away from bracing piece 52, and slot 411 is the logical groove that link up along limit baffle 41 length direction, and limit baffle 41 is located limiting plate 51 department and has seted up the logical groove 410 of embedding, and the logical groove 410 of embedding link up along limit baffle 41 width direction.

Referring to fig. 4 and 6, the utility power input line 3 is wound around the outgoing side wall of the bobbin 4, and an abutting reed 511 is mounted by a screw on a surface of the stopper plate 51 facing the bobbin 4, and the abutting reed 511 is fixed to an end of the stopper plate 51 near the housing 1. The limiting plate 51 is shifted into the embedding through groove 410 and is limited by the abutting plate 53, so that the commercial power input line 3 on the outer side wall of the winding pipe 4 is abutted and fixed.

Referring to fig. 6, the position limiting baffle 41 is located the slot 411 and has been seted up the fixed orifices 42, the fixed orifices 42 is the circular through-hole that runs through the slot 411, the butt plate 53 is located the fixed orifices 42 and has been seted up the locking hole 531, the locking hole 531 is the circular through-hole equally, the common adaptation ground is inserted in fixed orifices 42 and the locking hole 531 and is equipped with the locating lever 54, the locating lever 54 is cylindrical metal pole to be convenient for prescribe a limit to the position of butt plate 53.

Referring to fig. 6, a supporting plate 55 is integrally formed at one end of the positioning rod 54 away from the abutting plate 53, a magnetic member 551 is fixedly bonded to a surface of the supporting plate 55 facing the limit baffle 41, an absorbing member 412 is fixedly bonded to a surface of the limit baffle 41 facing the magnetic member 551, a supporting block 5520 is integrally formed at one side of the supporting plate 55 facing away from the limit baffle 41, and an operation ring 552 is rotatably connected to the supporting block 5520.

Referring to fig. 5, a temperature detection device 11 is fixedly bonded to an inner side wall of one end of the bobbin 4 close to the housing 1, the temperature detection device 11 is a thermocouple, the temperature detection device 11 is connected to the MCU2, the MCU2 is connected to a heat dissipation fan 12 installed in the bobbin 4, the heat dissipation fan 12 is an axial fan, and the direction of the heat dissipation fan 12 is toward the end of the bobbin 4 away from the housing 1, so as to promote the heat of the housing 1 to be dissipated outwards.

Referring to fig. 4 and 5, a plurality of heat dissipating holes 43 are formed in the side wall of the bobbin 4, and the heat dissipating holes 43 extend along the length direction of the bobbin 4 and are uniformly arranged around the bobbin 4. The radiating pipes 13 are uniformly distributed in the shell 1, the radiating pipes 13 are S-shaped and wound in the shell 1, and the radiating pipes 13 are hollow copper pipes. The heat-conducting plate 14 is embedded in one end, close to the heat-radiating fan 12, of the heat-radiating pipe 13, the heat-conducting plate 14 is a metal plate, a heat-conducting silicone pad 15 is fixedly bonded to one side, close to the inside of the casing 1, of the heat-conducting plate 14, and the heat-conducting silicone pad 15 is in contact with the heat-radiating pipe 13.

Referring to fig. 5, the heat dissipating pipe 13 is filled with heat dissipating oil, a booster pump 16 for promoting the circulation of the heat dissipating oil is connected in series to the heat dissipating pipe 13, the booster pump 16 is a micro-pump, the booster pump 16 is connected to the MCU2, and the micro-pump promotes the flow of the heat dissipating oil throughout the heat dissipating pipe 13, thereby promoting the heat to be dissipated outside.

The working principle is as follows:

when the electric device needs to be charged, the operation ring 552 is rotated out, and the positioning rod 54 is pulled out from the fixing hole 42 and the locking hole 531, so that the attracting member 412 is disengaged from the magnetic member 551. The abutting plate 53 is then removed from the slot 411, and the limiting plate 51 is disengaged from the abutment with the mains input line 3 wound around the bobbin 4. The mains input line 3 on the bobbin 4 can now be lowered. The utility power input line 3 is extended to a required length, then the limit plate 51 is abutted in the embedding through groove 410 of the limit baffle 41, and then the rotary abutting plate 53 is inserted into the slot 411. The detent lever 54 is inserted into the fixing hole 42 and the locking hole 531.

At this point, the powered device and the power adapter are turned on, and the detection module 26 of the MCU2 checks and charges the powered device. When the temperature detecting device 11 detects that the temperature in the bobbin 4 is higher than the preset value, the MCU2 controls the heat dissipation fan 12 to rotate, thereby promoting the heat to be dissipated outwards. Meanwhile, the MCU2 starts the booster pump 16, and the booster pump 16 promotes the circulation of the heat-dissipating oil to the heat-conducting silica gel pad 15 to be emitted outwards.

The embodiment also discloses a PD power adapter charging method compatible with various output voltages, which comprises the following steps:

s100, connecting the commercial power input end of the power adapter to a commercial power grid, connecting the output end of the power adapter to electric equipment,

s200, the detection module 26 of the MCU2 detects the voltage value of the electric equipment, automatically judges the input voltage of the electric equipment, transforms, rectifies and filters the alternating current into direct current, reduces the direct current into low-voltage direct current through the voltage stabilizing chip 24, outputs a corresponding signal to the voltage regulating module 25 according to the voltage value detected by the MCU2, enables the voltage regulating module 25 to output the voltage suitable for the electric equipment,

s300, testing the voltage of the electric equipment by the voltage measuring module 28 of the MCU 2;

s400, when the electric equipment is battery-free equipment, continuously supplying power to the electric equipment; when the electric device is a storage battery device, a storage battery of the electric device is charged. The method comprises the steps of starting timing when the voltage of the electric equipment is not changed any more, and stopping power supply to the electric equipment after a preset time is reached so as to prevent the battery from being shortened due to overcharging of the battery.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.