Cluster type quick charging device

Abstract

The invention discloses a cluster type quick charging device, which comprises a high-power AC / DC circuit, a plurality of charging circuits, a plurality of charging control circuits and a central control module, and is characterized in that the input end of the high-power AC / DC circuit is connected with a charging power supply; each charging circuit comprises a DC / DC conversion circuit, a power detection circuit and a charging port, the input end of the DC / DC conversion circuit is connected with the high-power AC / DC circuit, and the output end of the DC / DC conversion circuit is sequentially connected with the power detection circuit and the charging port; each charging control circuit is connected with the corresponding charging circuit in a one-to-one manner. A power scheduling strategy is preset in the central control module, and the output power of each charging port can be automatically allocated through the charging control circuit when a power scheduling event is monitored. When the central control module calculates that the power of the charging equipment reaches the power supply power of the charging device and new equipment is inserted into the charging device, the central control module can automatically allocate the output power of each charging port so as to ensure that each charging port can charge the to-be-charged equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of fast charging, and in particular to a cluster type fast charging device. Background Art

[0002] Fast charging technology is a typical technology in the current mobile device industry. It is achieved by increasing the output power of the charging port. However, general chargers only have a few charging ports and can only meet home use. For densely populated public places, such chargers cannot meet people's charging needs for a variety of mobile devices, especially because the output power of the charging device is small, the output ports are few, and the charging protocol is single.

[0003] Therefore, a high-power cluster fast charging device came into being. Summary of the invention

[0004] The object of the present invention is to provide a cluster-type fast charging device that can solve one or more of the above-mentioned problems in the prior art.

[0005] A cluster fast charging device, comprising: a high-power AC / DC circuit, multiple charging circuits, multiple charging control circuits and a central control module.

[0006] The input end of the high-power AC / DC circuit is connected to a charging power source, and is used to convert the alternating current input by the charging power source into direct current;

[0007] Each of the charging circuits comprises a DC / DC conversion circuit, a power detection circuit and a charging port, wherein the input end of the DC / DC conversion circuit is connected to the output end of the high-power AC / DC circuit, and the output end of the DC / DC conversion circuit is connected to the power detection circuit and the charging port in sequence, wherein the power detection circuit is used to monitor the output power of the DC / DC conversion circuit in real time, and the charging port is used to connect the device to be charged;

[0008] Each of the charging control circuits is connected to a corresponding charging circuit, and is used to read the charging protocol of the device to be charged, and issue a charging control instruction suitable for the device to be charged, and control the DC / DC conversion circuit to convert the DC power output by the high-power AC / DC circuit into the DC power required by the device to be charged;

[0009] The central control module is preset with a power scheduling strategy, which can automatically allocate the output power of each charging port through the charging control circuit when a power scheduling event is detected to ensure that each charging port can charge the device to be charged; the power scheduling event is that the power of the charging device of each charging port has reached the power supply power of the charging device and a new device to be charged is inserted into the charging port.

[0010] In some embodiments, the cluster charging device further includes an Internet of Things circuit, which includes a WIFI module and peripheral components for communicating with a user terminal so that a user can view the charging status of the charging device through an APP.

[0011] In some embodiments, the cluster charging device also includes a power supply circuit, wherein the input end of the power supply circuit is connected to the output end of the high-power AC / DC circuit, and the output end of the power supply circuit is respectively connected to the central control module and the Internet of Things circuit, for converting the voltage output by the high-power AC / DC circuit into a voltage suitable for the operation of the central control module and the Internet of Things circuit.

[0012] In some embodiments, the central control module includes an MCU control circuit and a program protection circuit and a port activation circuit respectively connected to the MCU control circuit, wherein the program protection circuit is used to send a signal to the MCU control circuit for self-destruction when theft is detected; and the port activation circuit is used to control the opening and closing of the charging port according to the instructions of the MCU control circuit.

[0013] In some embodiments, the central control module also includes a DC / DC cooling fan control circuit and a DC / DC temperature detection circuit, wherein the DC / DC temperature detection circuit is used to monitor the temperature of the DC / DC conversion circuit and send it to the MCU control circuit; the DC / DC cooling fan control circuit is used to control the start and stop of the corresponding cooling fan according to the control instructions of the MCU control circuit.

[0014] In some embodiments, the MCU control circuit further includes a light board and an indicator light, wherein the light board is used to indicate the working status of each of the charging ports; and the indicator light is used to indicate the communication status between the MCU control circuit and the WIFI module.

[0015] In some embodiments, the high-power AC / DC circuit includes an input rectification and filtering circuit, a PFC circuit, an LLC circuit and a synchronous rectification output circuit. The input end of the input rectification and filtering circuit is connected to an external power supply for converting the AC voltage input by the external power supply into a DC voltage; the output end of the input rectification and filtering circuit is connected to the PFC circuit and the LLC circuit in sequence for providing a stable DC output voltage to the device to be charged.

[0016] In some embodiments, the high-power AC / DC circuit further includes an AC / DC heat dissipation circuit, and the AC / DC heat dissipation circuit is used to monitor the temperature inside the high-power AC / DC conversion circuit to prevent overheating.

[0017] The beneficial effects of the present invention are as follows: the charging device of the present application has a large power of 1000W; there are as many as 16 charging ports, which can quickly charge 16 mobile devices at the same time, and the charging ports can be expanded according to market demand; the charging device is suitable for all current mobile devices with fast charging protocols; the charging device adopts an MCU control circuit, which can automatically adjust the charging parameters of each charging port, and can avoid the charging device being overloaded and causing the AC / DC circuit to be shut down, so as not to affect the charging of the device; the charging device can save a lot of time for users because it adopts a fast charging method; the charging device has many charging ports and is very suitable for places where people gather. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural block diagram of a charging device according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A schematic diagram of the structure of a high-power AC / DC circuit of the charging device shown;

[0020] Figure 3 yes Figure 1 A circuit diagram of a charging circuit of the charging device shown;

[0021] Figure 4 yes Figure 1 A schematic diagram of the structure of a central control module of the charging device shown;

[0022] Figure 5 for Figure 1 A schematic diagram of the structure of the Internet of Things circuit of the charging device shown;

[0023] Figure 6 for Figure 1 A schematic diagram of the structure of the power supply circuit of the charging device shown;

[0024] Numbers in the figure: 10, high-power AC / DC circuit; 20, charging circuit; 21, DC / DC conversion circuit; 22, power detection circuit; 23, charging port; 30, charging control circuit; 40, central control module; 50, Internet of Things circuit; 60, power supply circuit. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] Combination Figure 1 As shown, this embodiment provides a cluster fast charging device, including: a high-power AC / DC circuit 10, multiple charging circuits 20, multiple charging control circuits 30 and a central control module 40, the input end of the high-power AC / DC circuit 10 is connected to the charging power supply, which is used to convert the alternating current input by the charging power supply into direct current; each charging circuit 20 includes a DC / DC conversion circuit 21, a power detection circuit 22 and a charging port 23, the input end of the DC / DC conversion circuit 21 is connected to the output end of the high-power AC / DC circuit 10, the output end of the DC / DC conversion circuit 21 is connected to the power detection circuit 22 and the charging port 23 in sequence, the power detection circuit 22 is used to monitor the output power of the DC / DC conversion circuit 21 in real time, and the charging port 23 is used to connect the device to be charged;

[0027] Each charging control circuit 30 is connected to a corresponding charging circuit 20, and is used to read the charging protocol of the device to be charged, and issue a charging control instruction suitable for the device to be charged, and control the DC / DC conversion circuit 21 to convert the DC power output by the high-power AC / DC circuit 10 into the DC power required by the device to be charged;

[0028] A power scheduling strategy is preset in the central control module 40. When a power scheduling event is detected, the output power of each charging port 23 can be automatically allocated through the charging control circuit 30 to ensure that each charging port 23 can charge the charging device. The power scheduling event is that the power of the charging device at each charging port 23 has reached the power supply power of the charging device and a new device to be charged is inserted into the charging port 23.

[0029] Specific, combined Figure 2 As shown, the high-power AC / DC circuit 10 is composed of an input rectification and filtering circuit, a PFC circuit, an LLC circuit, a synchronous rectification output circuit, and an AC / DC heat dissipation circuit.

[0030] The input rectifier filter circuit is composed of the fuse F1, the varistor MOV1, the inductor LF1, LF2, the capacitor CX1, CX2, CX3, the bleeder resistor R1, R2, R3, R4, R5, R6, the rectifier bridge BD1, BD2, the capacitor CB1, CB2 and CY1, CY2, CY3, CY4, CY5, CY6. The fuse F1 protects the high-power AC / DC circuit when a fault occurs; the varistor MOV1 is the lightning protection circuit of the cluster fast charging device; the inductor LF1, LF2, the capacitor CX1, CX2, CX3 suppresses the conduction disturbance of the fast charging device to the power grid; the capacitor CY1, CY2, CY3, CY4, CY5, CY6 forms the electromagnetic interference suppression circuit; the bleeder resistor R2 / R5, R3 / R6, R1 / R4 are the bleeder resistors of the capacitors CX1, CX2, CX3 respectively; the rectifier bridge BD1, BD2 converts the AC input into DC V1, and the capacitors CB1, CB2 are the filter capacitors of V1.

[0031] The PFC circuit is mainly composed of inductors L2 and L3, rectifier diodes D5, D6, D7, field effect transistor Q6, filter capacitor EC2, relay J1, thermistor RT1, U2 and its peripheral components. D1, D2, R12 form the PFC startup circuit, U2 is the PFC control circuit, and the 2# pin output of U2 controls the switch of Q7, thereby controlling the switch of Q6; when Q6 is turned on, inductors L2 and L3 convert electrical energy into magnetic field energy and store it in inductors L2 and L3. When Q6 is turned off, the magnetic field energy stored in inductors L2 and L3 is converted into electrical energy and rectified into direct current V2 by rectifier diodes D5, D6, D7. Thermistor RT1 protects the LLC circuit from damage caused by impact, and filter capacitor CE2 filters the voltage HV to keep the voltage To stabilize the voltage HV, relay J1 short-circuits RT1 after the AC / DC circuit can work normally to avoid damage to RT1; V_PFC is the working voltage of U2, CE1 and C10 are the filter capacitors of V_PFC, and V_PFC is also the starting voltage of the LLC circuit when the circuit starts working; R38 and R33 are the sampling circuit of the voltage HV; D17-D20, R62, R65, CE8, CE10, Q14, and ZD2 form the VCC-B power supply circuit, which provides working power for relay J1; R20 is the PFC overcurrent sampling circuit.

[0032] LLC circuit is mainly composed of resonant inductor L4, primary inductance (i.e. magnetizing inductance) of transformers T1 and T2, resonant capacitor C22, control circuit IC1 and its peripheral components, Q13, Q17 and their drive circuit. D21-D24, R63, R57, CE7, CE9, Q12, ZD1 form VCC-A power supply circuit, which provides working power for 1C1 and U2. D12, D13, D14 are isolation diodes, which isolate the working power of IC1 and U2. The output signal LDR of pin 11 of IC1 controls the operation of MOS tube Q17. R56, R60, R64, D15 and Q15 constitute the driving circuit of MOS tube Q17. The output signal HDR of pin 15 of IC1 controls the operation of MOS tube Q13. R58, R59, R61, D16 and Q16 constitute the driving circuit of MOS tube Q13. C17, C21, R55, D9, D10, R40 and R42 constitute the overcurrent detection circuit of LLC circuit. C19 and C20 can stabilize the working status of Q13 and Q17 respectively.

[0033] The synchronous rectification output circuit is mainly composed of transformers T1 and T2, synchronous rectification circuit, output filter capacitor, and output voltage control circuit; the output voltage of transformers T1 and T2 is supplied to the DC / DC circuit after synchronous rectification and filtering; Q18-Q25 MOS tubes are synchronous rectification tubes, U5 and U6 are synchronous rectification control circuits, and U1, U3, U4 and their peripheral components constitute the output voltage control circuit.

[0034] The AC / DC heat dissipation circuit is mainly composed of MOS tube Q26, fan FAN, and temperature detection resistor RT3. RT3 is used as a temperature detection resistor. When the internal temperature of the AC / DC power supply reaches about 75°C, MOS tube Q26 is turned on and fan FAN works. D28 in the circuit is a protection diode to prevent the high reverse voltage generated when fan FAN is turned off from damaging MOS tube Q26.

[0035] Specific, combined Figure 3 As shown, the DC / DC conversion circuit 21 takes the first charging circuit as an example. In the circuit, 1U1 and its peripheral components constitute the control circuit of the DC / DC conversion circuit; 1U2 is the charging protocol, which is applicable to all current mobile devices with fast charging protocols; 1PD is the output USB-C. In the circuit, 1R3, 1R4, and 1R6 are output sampling resistors, 1RCS is an overcurrent protection sampling resistor, 1RS is a current sampling resistor and also has the protocol overcurrent protection sampling function, F2 is insurance, 1Q1 is a control switch, 1Q2 is a freewheeling tube, 1L1 is a filter inductor, 1R2 and 1C6 constitute a surge absorption circuit, and 1Q3 is an output control switch.

[0036] Furthermore, the cluster fast charging device of the present application also includes an Internet of Things circuit 50, combined with Figure 5As shown, the Internet of Things circuit 50 includes a WIFI module and peripheral components. The user downloads the "innovatecharger" APP applet through the Internet of Things circuit and clicks the "1000W" button on the operation interface to check the charging current, charging voltage, and charging power of the charging device at any time.

[0037] Furthermore, the cluster fast charging device of the present application also includes a power supply circuit 60, the input end of the power supply circuit 60 is connected to the output end of the high-power AC / DC circuit 10, and the output end of the power supply circuit 60 is respectively connected to the central control module 40 and the Internet of Things circuit 50, for converting the voltage output by the high-power AC / DC circuit 10 into a voltage suitable for the operation of the central control module 40 and the Internet of Things circuit 50.

[0038] Specific, combined Figure 6 As shown, the power supply circuit is composed of U5 and its peripheral components, which are used to convert the output voltage Vo of the high-power AC / DC circuit into a voltage VWF suitable for the operation of the central control module 40 and the Internet of Things circuit 50. C14 is the input filter capacitor of U5, U5 is the control circuit of DC / DC conversion, C15 and R28 are the bootstrap circuit of U5; C16 and R27 are absorption circuits; L1 is both a filter inductor and an energy storage device; E2 is the output filter capacitor of the power supply circuit; R29, R30, and R31 are output sampling circuits, which are used to detect the output voltage of the power supply circuit to control the power supply circuit to output a stable VWF voltage.

[0039] Specific, combined Figure 4 As shown, the central control module 40 includes an MCU control circuit and a program protection circuit and a port activation circuit respectively connected to the MCU control circuit. The program protection circuit is used to send a signal to the MCU control circuit for self-destruction when theft is detected; the port activation circuit is used to control the opening and closing of the charging port 23 according to the instructions of the MCU control circuit.

[0040] Furthermore, the central control module 40 also includes a DC / DC cooling fan control circuit and a DC / DC temperature detection circuit. The DC / DC temperature detection circuit is used to monitor the temperature of the DC / DC conversion circuit 21 and send it to the MCU control circuit; the DC / DC cooling fan control circuit is used to control the start and stop of the corresponding cooling fan according to the control instructions of the MCU control circuit. The MCU control circuit also includes a light board and an indicator light. The light board is used to indicate the working status of each of the charging ports 23; the indicator light is used to indicate the communication status of the MCU control circuit and the WIFI module.

[0041] Specifically, the MCU control circuit is mainly composed of an MCU (U2), a data storage device (U4), a light board (J-LED), and an indicator light (LED1). The light board is used to indicate the working status of each charging port 23. The light is green when there is no device connected to the charging port or the device is fully charged; and red when there is a device being charged at the charging port.

[0042] LED1 has the following indication functions:

[0043] 1. Initially, the MCU control circuit communicates with the WIFI module WIFI. The MCU sends instructions to the WIFI module. If the WIFI module responds, LED1 lights up. If there is no response, LED1 goes out.

[0044] 2. When the WIFI module is disconnected from the background, LED1 is off; when the WIFI module is connected to the background, the MCU does not receive the background command, and LED1 is always on; when the MCU receives the background command, LED1 flashes at a speed of 100ms for 1.3 seconds.

[0045] The temperature detection of the DC / DC conversion circuit is mainly composed of NTC1, R9, NTC2, and R10. In order to meet the heat dissipation needs of the DC / DC conversion circuit, three fans are set up. The fans have two gears. When the temperature of the DC / DC conversion circuit reaches 60°C, Q3A, Q3B, and Q3C are turned on to control the fans to work slowly. When the temperature of the DC / DC conversion circuit reaches 75°C, Q1, Q2, and Q3 are turned on to control the fans to work at full speed.

[0046] The program protection circuit is composed of S1 and R13. When someone attempts to steal the program, the protection circuit will self-destruct to prevent the program from being stolen.

[0047] When the cluster fast charging device is not connected to a load, all charging ports 23 are closed to save power. When a load is connected, the charging port will be activated. The charging port activation circuit is divided into four groups, consisting of R43, 1D, 2D, 3D, 4D as one group, R45, 5D, 6D, 7D, 8D as the second group, R47, 9D, 10D, 11D, 12D as the third group, R49, 13D, 14D, 15D, 16D as the fourth group, etc. As long as one port in each group is connected to a load, the four ports of the group will be opened.

[0048] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. Cluster fast charging device, characterized in that: include: A high-power AC / DC circuit (10), a plurality of charging circuits (20), a plurality of charging control circuits (30) and a central control module (40), The input end of the high-power AC / DC circuit (10) is connected to a charging power source and is used to convert the alternating current input by the charging power source into direct current; Each of the charging circuits (20) comprises a DC / DC conversion circuit (21), a power detection circuit (22) and a charging port (23); the input end of the DC / DC conversion circuit (21) is connected to the output end of the high-power AC / DC circuit (10); the output end of the DC / DC conversion circuit (21) is connected to the power detection circuit (22) and the charging port (23) in sequence; the power detection circuit (22) is used to monitor the output power of the DC / DC conversion circuit (21) in real time; and the charging port (23) is used to connect to a device to be charged; Each of the charging control circuits (30) is connected to a corresponding charging circuit (20) and is used to read the charging protocol of the device to be charged, and issue a charging control instruction suitable for the device to be charged, and control the DC / DC conversion circuit (21) to convert the direct current output by the high-power AC / DC circuit (10) into the direct current required by the device to be charged; The central control module (40) is preset with a power dispatching strategy, and when a power dispatching event is detected, the output power of each charging port (23) can be automatically allocated through the charging control circuit (30) to ensure that each charging port (23) can charge the device to be charged; the power dispatching event is when the power of the charging device at each charging port (23) has reached the power of the power supply of the charging device and a new device to be charged is inserted into the charging port (23).

2. The cluster fast charging device according to claim 1, characterized in that: It also includes an Internet of Things circuit (50), which includes a WIFI module and peripheral components and is used to communicate with a user terminal so that the user can view the charging status of the charging device through an APP.

3. The cluster fast charging device according to claim 2, characterized in that: It also comprises a power supply circuit (60), the input end of the power supply circuit (60) being connected to the output end of the high-power AC / DC circuit (10), and the output end of the power supply circuit (60) being respectively connected to the central control module (40) and the Internet of Things circuit (50), for converting the voltage output by the high-power AC / DC circuit (10) into a voltage suitable for the operation of the central control module (40) and the Internet of Things circuit (50).

4. The cluster fast charging device according to claim 3, characterized in that: The central control module (40) comprises an MCU control circuit and a program protection circuit and a port activation circuit respectively connected to the MCU control circuit, wherein the program protection circuit is used to send a signal to the MCU control circuit to self-destruct when a theft behavior is detected; and the port activation circuit is used to control the opening and closing of the charging port (23) according to the instructions of the MCU control circuit.

5. The cluster fast charging device according to claim 4, characterized in that: The central control module (40) further comprises a DC / DC cooling fan control circuit and a DC / DC temperature detection circuit, wherein the DC / DC temperature detection circuit is used to monitor the temperature of the DC / DC conversion circuit (21) and send the temperature to the MCU control circuit; and the DC / DC cooling fan control circuit is used to control the start and stop of the corresponding cooling fan according to the control instruction of the MCU control circuit.

6. The cluster fast charging device according to claim 4, characterized in that: The MCU control circuit also includes a light board and an indicator light, wherein the light board is used to indicate the working state of each charging port (23); and the indicator light is used to indicate the communication state between the MCU control circuit and the WIFI module.

7. The cluster fast charging device according to claim 1, characterized in that: The high-power AC / DC circuit (10) comprises an input rectifying and filtering circuit, a PFC circuit, an LLC circuit and a synchronous rectifying and outputting circuit. The input end of the input rectifying and filtering circuit is connected to an external power supply and is used to convert the AC voltage input by the external power supply into a DC voltage. The output end of the input rectifying and filtering circuit is connected to the PFC circuit and the LLC circuit in sequence and is used to provide a stable DC output voltage to the device to be charged.

8. The cluster fast charging device according to claim 7, characterized in that: The high-power AC / DC circuit (10) further comprises an AC / DC heat dissipation circuit, wherein the AC / DC heat dissipation circuit is used to monitor the temperature inside the high-power AC / DC conversion circuit to prevent overheating.

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