Multi-port charging device

Abstract

The embodiment of the present invention discloses a multi-port charging device. It includes: multiple charging interfaces, a detection module, a control module, a switch module and a voltage regulation module; the detection module includes multiple detection units, and the switch module includes multiple switch units; multiple charging interfaces, multiple switch units and multiple detection units correspond to each other one by one; the control module is used to receive the connection status between the charging interface and the external device fed back by each detection unit, and send a switch control signal to the switch unit according to the connection status between the charging interface and the external device; the control module is used to adjust the voltage output from the voltage output end of the voltage regulation module to the power supply end of the charging interface according to the connection status between the charging interface and the external device fed back by each detection unit. The technical solution provided by the embodiment of the present invention can accurately control the opening and closing of each charging interface and intelligently distribute power.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of charging technology, and in particular to a multi-port charging device. Background Art

[0002] With the development of electronic devices, the market demand for multi-port charging devices is increasing. Therefore, multi-port charging devices have become a major research hotspot.

[0003] At present, the multiple charging interfaces in most multi-port charging devices have fixed output powers. For example, a multi-port charging device includes two charging interfaces, one of which has a smaller output power value, and the other has a larger output power value. When the two output interfaces are connected to devices of different power levels, when the charging interface with a smaller output power value is connected to a higher power charging device, the charging device cannot obtain sufficient charging power. When the charging interface with a larger output power value is connected to a lower power charging device, it will lead to a waste of charging power. In other words, the current multi-port charging devices generally have the problem of being unable to distribute power, which affects the user experience. Summary of the invention

[0004] The present invention provides a multi-port charging device to achieve accurate control of the opening and closing of each charging interface and intelligent power distribution.

[0005] In a first aspect, an embodiment of the present invention provides a multi-port charging device, comprising: a plurality of charging interfaces, a detection module, a control module, a switch module and a voltage control module; the detection module comprises a plurality of detection units, and the switch module comprises a plurality of switch units; the plurality of charging interfaces, the plurality of switch units and the plurality of detection units correspond to each other one by one;

[0006] The voltage output terminal of the detection unit is electrically connected to the voltage terminal of the charging interface, the ground terminal of the charging interface is electrically connected to the first terminal of the switch unit and the first input terminal of the detection unit respectively, the second input terminal of the detection unit is electrically connected to the second terminal of the switch unit, the switch control input terminal of the switch unit is electrically connected to the switch control output terminal of the control module, and the state output terminal of the detection unit is electrically connected to the state input terminal of the control module; the detection unit is used to detect the connection state between the charging interface and the external device; the control module is used to receive the connection state between the charging interface and the external device fed back by each detection unit, and send a switch control signal to the switch unit according to the connection state between the charging interface and the external device;

[0007] The voltage output end of the voltage regulation module is electrically connected to the power end of the charging interface, the interface communication end of the voltage regulation module is electrically connected to the communication end of the charging interface, the control communication end of the voltage regulation module is electrically connected to the communication end of the control module, and the second end of the switch unit and the ground end of the voltage regulation module are both electrically connected to the ground end of the multi-port charging device; the control module is used to adjust the power output from the voltage output end of the voltage regulation module to the charging interface according to the connection status of the charging interface and the external device fed back by each detection unit.

[0008] Optionally, the detection unit includes: a first resistor, a second resistor, a first filter circuit, a second filter circuit and a detection chip;

[0009] A first end of the first resistor is electrically connected to a first power supply end of the multi-port charging device, a second end of the first resistor is electrically connected to a power supply end of the charging interface, a ground end of the charging interface is electrically connected to a first end of the second resistor, and a second end of the second resistor is grounded;

[0010] The first end of the first filter circuit is electrically connected to the first end of the second resistor and the first end of the switch unit, and the second end of the first filter circuit is electrically connected to the first input end of the detection chip; the first end of the second filter circuit is electrically connected to the second end of the switch unit and the ground end of the multi-port charging device, and the second end of the second filter circuit is electrically connected to the second input end of the detection chip;

[0011] The first filter circuit and the second filter circuit are used for filtering; the detection chip is used to generate a status signal for characterizing the connection status between the charging interface and the external device according to the signals input from the first input terminal and the second input terminal of the detection chip, and the status signal includes a first level signal, a second level signal and a clock signal.

[0012] Optionally, the detection chip includes a first comparator, a second comparator, an AND gate, a NAND gate, and a clock generator;

[0013] The positive phase input terminal of the first comparator and the positive phase input terminal of the second comparator are both electrically connected to the second end of the first filter circuit, the negative phase input terminal of the first comparator is electrically connected to the second end of the second filter circuit, and the output terminal of the first comparator is electrically connected to the first input terminal of the AND gate;

[0014] The inverting input terminal of the second comparator is electrically connected to the reference voltage terminal of the multi-port charging device, the output terminal of the second comparator is electrically connected to the first input terminal of the NAND gate, the output terminal of the clock generator is electrically connected to the second input terminal of the NAND gate, and the output terminal of the NAND gate is electrically connected to the second input terminal of the AND gate;

[0015] The output end of the AND gate is electrically connected to the control module.

[0016] Optionally, the detection chip further includes a de-jitter, a first end of the de-jitter is electrically connected to the output end of the first comparator, and a second end of the de-jitter is electrically connected to the first input end of the AND gate.

[0017] Optionally, the detection chip further includes a first switch, and the detection unit further includes a third resistor;

[0018] The control end of the first switch is electrically connected to the output end of the AND gate, the first end of the first switch is electrically connected to the second end of the third resistor, the first end of the third resistor is electrically connected to the first power supply end of the multi-port charging device, and the second end of the first switch is grounded.

[0019] Optionally, the detection unit also includes a first diode, an anode of the first diode is electrically connected to the second end of the first resistor, and a cathode of the first diode is electrically connected to the power supply end of the charging interface.

[0020] Optionally, the first filter circuit includes a fourth resistor and a first capacitor; the second filter circuit includes a fifth resistor, a first capacitor and a second capacitor;

[0021] A first end of the fourth resistor is electrically connected to the first end of the switch unit, a second end of the fourth resistor is electrically connected to the first end of the first capacitor, and a second end of the first capacitor is grounded;

[0022] The first end of the fifth resistor is electrically connected to the second end of the switch unit, the second end of the fifth resistor is electrically connected to the first end of the second capacitor, and the second end of the second capacitor is grounded.

[0023] Optionally, the switch unit includes a metal-oxide semiconductor field effect transistor.

[0024] Optionally, the charging interface includes a TYPE-A interface.

[0025] Optionally, the control module comprises a microcontroller.

[0026] The multi-port charging device provided in the embodiment of the present invention detects the connection status of each charging interface with an external device through a detection module, so that the control module can shut down the charging interface that is not connected to the external device according to the connection status of each charging interface with the external device, and adjust the power output from the voltage output end of the voltage control module to the charging interface according to the power level of the external device connected to each charging interface, so that each externally connected device can be charged with the largest possible charging power under safe conditions, thereby improving the charging efficiency, solving the problem of power distribution in the prior art, and realizing precise control of the opening and closing of each charging interface, and intelligently performing the effect of power distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a multi-port charging device provided by an embodiment of the present invention;

[0028] Figure 2 It is a circuit component diagram of a multi-port charging device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] Figure 1 is a schematic diagram of the structure of a multi-port charging device provided by an embodiment of the present invention. Figure 1 The multi-port charging device includes: multiple charging interfaces 50, a detection module, a control module 30, a switch module and a voltage control module 40; the detection module includes multiple detection units 110, and the switch module includes multiple switch units 210; the multiple charging interfaces 50, the multiple switch units 210 and the multiple detection units 110 correspond to each other. The voltage output terminal VOUT of the detection unit 110 is electrically connected to the voltage terminal VBUS of the charging interface 50, the ground terminal Gnd of the charging interface 50 is electrically connected to the first terminal D of the switch unit 210 and the first input terminal IN+ of the detection unit 110, respectively, the second input terminal IN- of the detection unit 110 is electrically connected to the second terminal S of the switch unit 210, and the switch control input terminal G of the switch unit 210 is electrically connected to the switch control output terminal C( Figure 1 The control module 30 is shown in the example as including a first switch control output terminal C1 and a second switch control terminal C2) electrically connected, and the state output terminal FLAG of the detection unit 110 is connected to the state input terminal F( Figure 1 , the control module 30 is shown as an example, including a first state input terminal F1 and a second state input terminal F2) electrically connected; the detection unit 110 is used to detect the connection state of the charging interface 50 and the external device; the control module 30 is used to receive the connection state of the charging interface 50 and the external device fed back by each detection unit 110, and send a switch control signal to the switch unit 210 according to the connection state of the charging interface 50 and the external device; the voltage output terminal vout ( Figure 1 The voltage control module 40 includes a first voltage output terminal vout1 and a second voltage output terminal vout2) electrically connected to the power supply terminal VBUS of the charging interface 50, and the interface communication terminal d( Figure 1The example shows that the voltage regulation module 40 includes a first interface communication terminal d1 and a second interface communication terminal d2) which are electrically connected to the communication terminal d' of the charging interface 50, the control communication terminal t of the voltage regulation module 40 is electrically connected to the communication terminal T of the control module 30, and the second terminal S of the switch unit 210 and the ground terminal gnd of the voltage regulation module 40 are both electrically connected to the ground terminal GND of the multi-port charging device; the control module 30 is used to adjust the power output from the voltage output terminal of the voltage regulation module 40 to the charging interface 50 according to the connection status between the charging interface 50 and the external device fed back by each detection unit 110.

[0031] Specifically, the multi-port charging device can be a charging adapter or a mobile power supply, which is not limited in this application. The external device can be an electronic device such as a mobile phone, a computer, a smart wearable device, etc., which is not limited in this application.

[0032] Specifically, the detection unit 110 is used to detect the connection status between the corresponding charging interface 50 and the external device, and the connection status may include not being connected to the external device, being connected to the external device for a moment, and being charging the external device.

[0033] Specifically, the control module 30 is used to shut down the charging interface 50 that is not connected to the external device through the switch unit 210 according to the connection status with the external device fed back by each detection unit 110, and to turn on the charging interface 50 connected to the external device (the charging interface 50 that has just been connected to the external device and the charging interface 50 that is charging the external device) through the switch unit 210 so that the voltage regulation module 40 can charge the external connected device through the charging interface 50.

[0034] Specifically, the voltage control module 40 is used to communicate with the external devices connected to each charging interface 50 to obtain the rated charging power of each external device connected to each charging interface 50. The voltage control module 40 is also used to communicate with the control module 30. The voltage control module 40 can send the rated charging power of each external device to the control module 30. After the control module 30 knows the rated charging power of each external device and the on / off state of each charging interface 50, it can derive the optimal charging power value according to the built-in control strategy and send it to the voltage control module 40, so that the power output by the voltage control module 40 to each charging interface 50 connected to the external device is the optimal charging power value. The specific control strategy can be set by those skilled in the art according to the actual situation, which is not limited here. For example, the control strategy can be: among the external devices connected to each charging interface 50, the rated charging power of the external device with the smallest rated charging power is set as the optimal charging power value.

[0035] Specifically, Figure 1The working process of the multi-port charging device shown is as follows: each detection unit 110 detects the connection status between the corresponding charging interface 50 and the external device; the control module 30 disconnects the charging interface 50 that is not connected to the external device through each switch unit 210 according to the connection status between the charging interface 50 and the external device fed back by each detection unit 110, and connects the charging interface 50 that has just been connected to the external device and the charging interface 50 that is charging the external device; the voltage regulation module 40 obtains the rated charging power of the external device connected to each charging port 50 connected to the external device and sends it to the control module 30; the control module 30 obtains the optimal charging power value according to the regulation strategy; the voltage regulation module 40 outputs power to each charging interface 50 connected to the external device according to the optimal charging power value.

[0036] For example, to clearly illustrate that the multi-port charging device in this application can accurately control the on and off of each charging interface 50 and intelligently adjust the power, the following will be explained with examples in combination with specific application scenarios. Figure 1 The multi-port charging device includes two charging interfaces 50, one of which is connected to a tablet computer with a rated charging power of 20W, and the other is connected to a mobile phone with a rated charging power of 10W. Then, the optimal charging power value is 10W, and the power output by the voltage regulation module 40 to the two charging interfaces 50 is 10W; when the mobile phone is removed and the tablet computer is still charging, the control module 30 will disconnect the charging interface 50 originally connected to the mobile phone through the switch unit 110, and at the same time, keep the charging interface 50 connected to the tablet computer turned on, and the control module 30 controls the voltage regulation module 40 to increase the power output to the charging interface connected to the tablet computer to 20W, thereby improving the charging efficiency of the tablet computer.

[0037] It should be noted that for the convenience of drawing, Figure 1 The figure only exemplarily shows that the multi-port charging device includes two charging interfaces 50, but this is not a limitation of the present application. The number of charging interfaces 50 in the multi-port charging device can be set by those skilled in the art according to actual conditions.

[0038] The multi-port charging device provided in the embodiment of the present invention detects the connection status of each charging interface 50 with an external device through a detection module, so that the control module 30 can shut down the charging interface 50 that is not connected to the external device according to the connection status of each charging interface 50 with the external device, and adjust the power output from the voltage output end of the voltage control module 40 to the charging interface 50 according to the power level of the external device connected to each charging interface 50, so that each external connection device can be charged with the largest possible charging power under safe conditions, thereby improving the charging efficiency, solving the problem of power distribution in the prior art, and realizing precise control of the opening and closing of each charging interface 50, and intelligently performing the effect of power distribution.

[0039] Specifically, there are many specific implementation methods for each module in the multi-port charging device, which will be explained below with reference to typical examples, but are not intended to limit the present application.

[0040] Figure 2 is a circuit element diagram of a multi-port charging device provided by an embodiment of the present invention. Figure 1 and Figure 2 Optionally, the detection unit 110 includes: a first resistor R1, a second resistor R2, a first filter circuit, a second filter circuit and a detection chip 111; the first end of the first resistor R1 is electrically connected to the first power supply terminal of the multi-port charging device, the second end of the first resistor R1 (that is, the voltage output terminal VOUT of the detection unit 110) is electrically connected to the power supply terminal VBUS of the charging interface 50, the ground terminal Gnd of the charging interface 50 is electrically connected to the first end of the second resistor R2 (that is, the first input terminal IN+ of the detection unit 110), and the second end of the second resistor R2 is grounded; the first end of the first filter circuit is electrically connected to the first end of the second resistor R2 and the first end D of the switch unit 210, respectively, and the first The second end of the filter circuit is electrically connected to the first input end of the detection chip 111; the first end of the second filter circuit (i.e., the second input end IN- of the detection unit 110) is electrically connected to the second end S of the switch unit 210 and the ground end GND of the multi-port charging device, respectively, and the second end of the second filter circuit is electrically connected to the second input end of the detection chip 111; the first filter circuit and the second filter circuit are used for filtering; the detection chip 111 is used to generate a status signal for characterizing the connection status of the charging interface 50 and the external device according to the signals input from the first input end of the detection chip 111 and the second input end of the detection chip 111, and the status signal includes a first level signal, a second level signal and a clock signal.

[0041] Specifically, the resistance of the second resistor R2 is much greater than the resistance of the first resistor R1. For example, the resistance of the second resistor R2 is 2M, and the resistance of the first resistor R1 is 1K. In this way, when the charging interface 50 is just connected to an external device, the voltage received by the first input terminal IN+ of the detection chip 111 is approximately equal to the voltage provided by the first power supply terminal VCC of the multi-port charging device, that is, a high level is received. Specifically, the conduction voltage drop of the switch unit 210 is much smaller than the voltage provided by the first power supply terminal VCC of the multi-port charging device. For example, the voltage provided by the first power supply terminal VCC of the multi-port charging device is 3.3V, and the conduction voltage drop of the switch unit 210 is 0.3V.

[0042] Specifically, when no external device is connected to the charging interface 50, the switch unit 110 is in the disconnected state, the first input terminal of the detection chip 111 inputs a low level, and the second input terminal of the detection chip 111 inputs a low level; when the charging interface 50 has just connected an external device, the switch unit 110 is still in the disconnected state, the first input terminal of the detection chip 111 inputs a high level, and the second input terminal of the detection chip 111 inputs a low level; when the charging interface 50 is charging an external device, the switch unit 110 is in the on state, the voltage value input to the first input terminal of the detection chip 111 is the on-state voltage drop value of the switch unit 110, and the second input terminal of the detection chip 111 inputs a low level. It can be seen that when the connection state between the charging interface 50 and the external device is respectively when the external device is not connected, the external device is connected at the moment, or the external device is being charged, the detection chip 111 receives different signals, therefore, the detection chip 111 can generate a state signal for characterizing the connection state between the charging interface 50 and the external device according to the signals input to the first input terminal of the detection chip 111 and the second input terminal of the detection chip 111.

[0043] Specifically, the status signals include three types, namely, a first level signal, a second level signal, and a clock signal. The three status signals correspond one to one with the three connection states of the charging interface 50 and the external device. The specific corresponding conditions can be set by technicians in this field according to the actual situation, which is not limited here. For example, the first level signal corresponds to the external device not being connected, the clock signal corresponds to the moment of connecting the external device, and the second level signal corresponds to the external device being charged.

[0044] Continue to see Figure 1 and Figure 2Optionally, the detection chip includes a first comparator CMP1, a second comparator CMP2, an AND gate A, a NAND gate NA and a clock generator CLK; the positive input terminal of the first comparator CMP1 and the positive input terminal of the second comparator CMP2 are both electrically connected to the second end of the first filter circuit, the inverting input terminal of the first comparator CMP1 is electrically connected to the second end of the second filter circuit, and the output terminal of the first comparator CMP1 is electrically connected to the first input terminal of the AND gate A; the inverting input terminal of the second comparator CMP2 is electrically connected to the reference voltage terminal of the multi-port charging device, the output terminal of the second comparator CMP2 is electrically connected to the first input terminal of the NAND gate NA, the output terminal of the clock generator CLK is electrically connected to the second input terminal of the NAND gate NA, and the output terminal of the NAND gate NA is electrically connected to the second input terminal of the AND gate A; the output terminal of the AND gate A (i.e., the state signal terminal FLAG of the detection unit 110) is electrically connected to the control module 30.

[0045] Specifically, when the external device is just connected to the charging interface 50, the voltage input to the first input terminal IN+ of the detection chip 111 is greater than the voltage of the reference voltage terminal REF of the multi-port charging device. Exemplarily, when the external device is just connected to the charging interface 50, the voltage that can be received by the first input terminal IN+ of the detection chip 111 is approximately equal to 3.3V, and the voltage of the reference voltage terminal REF of the multi-port charging device is 1V. Specifically, the clock generator CLK is used to generate a clock signal.

[0046] Specifically, the working principle of the detection chip 111 is as follows: when no external device is connected to the charging interface 50, the switch unit 110 is in the disconnected state, the first input terminal of the detection chip 111 inputs a low level, the second input terminal of the detection chip 111 inputs a low level, the first comparator CMP1 outputs a low level, the second comparator CMP2 outputs a low level, the NAND gate NA outputs a high level, and the AND gate A outputs a low level. When the external device is just connected to the charging interface 50, the switch unit 110 is still in the disconnected state, the first input terminal of the detection chip 111 inputs a high level, the second input terminal of the detection chip 111 inputs a low level, the first comparator CMP1 outputs a high level, the second comparator CMP2 outputs a high level, the NAND gate NA outputs a clock, and the AND gate A outputs a clock signal. When the charging interface 50 is charging an external device, the switch unit 110 is in the on state, the voltage value input to the first input terminal of the detection chip 111 is the on-state voltage drop value of the switch unit 110, the second input terminal of the detection chip 111 inputs a low level, the first comparator CMP1 outputs a high level, the second comparator CMP2 outputs a low level, the NAND gate NA outputs a high level, and the AND gate A outputs a high level.

[0047] Continue to see Figure 1 and Figure 2Optionally, the detection chip further includes a de-jitter DEB, a first end of the de-jitter DEB is electrically connected to the output end of the first comparator CMP1, and a second end of the de-jitter DEB is electrically connected to the first input end of the AND gate A. The advantage of such a setting is that the AND gate A is prevented from regarding the jitter signal on its first input end as a valid signal, thereby preventing the detection chip from erroneously detecting the connection status between the corresponding charging interface 50 and the external device.

[0048] Continue to see Figure 1 and Figure 2 Optionally, the detection chip also includes a first switch Q1, and the detection unit 110 also includes a third resistor R3; the control end of the first switch Q1 is electrically connected to the output end of the AND gate A, the first end of the first switch Q1 (that is, the state signal end FLAG of the detection unit 110) is electrically connected to the second end of the third resistor R3, the first end of the third resistor R3 is electrically connected to the first power supply end VCC of the multi-port charging device, and the second end of the first switch Q1 is grounded.

[0049] Optionally, the first switch Q1 includes a metal-oxide semiconductor field effect transistor (Metal Oxide Semiconductor Field Effect Transistor, referred to as MOS), and the first switch Q1 can be a P-type MOS or an N-type MOS. Those skilled in the art can set it according to actual conditions, and this application does not limit this. Exemplarily, when the first switch Q1 is an N-type MOS, when a low level is input to the control end of the first switch Q1, the first switch Q1 is in an off state, and the first end of the first switch Q1 (i.e., the state output end FLAG of the detection unit 110) outputs a high level; when a clock is input to the control end of the first switch Q1, the first switch Q1 is in a state of continuous on and off, and the first end of the first switch Q1 outputs a clock; when a high level is input to the control end of the first switch Q1, the first switch Q1 is in an on state, and the first end of the first switch Q1 outputs a low level.

[0050] It can be understood that when the first end of the first switch Q1 outputs a high level, the specific value of the high level is related to the voltage of the first power terminal VCC of the multi-port charging device and the third resistor R3. The specific value of the high level output by the first end of the first switch Q1 can be flexibly adjusted by adjusting the voltage of the first power terminal VCC and the third resistor R3, so that the high level meets subsequent usage requirements.

[0051] Continue to see Figure 1 and Figure 2Optionally, the detection unit 110 further includes a first diode D1, the anode of the first diode D1 is electrically connected to the second end of the first resistor R1, and the cathode of the first diode D1 is electrically connected to the power supply terminal VBUS of the charging interface 50. The advantage of such a setting is that it can prevent the current from flowing back to the first power supply terminal VCC of the multi-port charging device when the voltage regulation module 40 provides power to the charging interface 50.

[0052] Continue to see Figure 1 and Figure 2 Optionally, the first filter circuit includes a fourth resistor R4 and a first capacitor C1; the second filter circuit includes a fifth resistor R5 and a second capacitor C2; the first end of the fourth resistor R4 is electrically connected to the first end of the switch unit 210, the second end of the fourth resistor R4 is electrically connected to the first end of the first capacitor C1, and the second end of the first capacitor C1 is grounded; the first end of the fifth resistor R5 is electrically connected to the second end of the switch unit 210, the second end of the fifth resistor R5 is electrically connected to the first end of the second capacitor C2, and the second end of the second capacitor C2 is grounded. It can be understood that the RC filter circuit has a simple circuit, strong anti-interference performance, and is conducive to reducing costs.

[0053] Continue to see Figure 1 and Figure 2 Optionally, the switch unit 210 includes a metal-oxide semiconductor field effect transistor. Specifically, the MOS in the switch unit 210 can be a P-type MOS or an N-type MOS, and those skilled in the art can set it according to actual conditions, and this application does not limit this.

[0054] Specifically, the first comparator CMP1 can use a comparator with higher detection accuracy. For example, a comparator with a detection accuracy of less than or equal to 50μV can be selected. It can be understood that the impedance of the source and drain of the MOS is usually 0.001Ω. Since 50μV / 0.001Ω, when the current of the external device is greater than 5mA when charging, the detection unit 110 can detect that the charging interface 50 is connected to the external device, that is, the detection unit 110 can accurately detect the connection status between the charging interface 50 and the external device.

[0055] Continue to see Figure 1 and Figure 2 Optionally, the charging interface 50 includes a TYPE-A interface. It is understandable that the TYPE-A interface itself usually does not have a circuit capable of detecting whether an external device is connected thereto. Therefore, the charging interface in the present application may include a TYPE-A interface.

[0056] Continue to see Figure 1 and Figure 2, Optionally, the control module 30 includes a microcontroller unit (MCU). It can be understood that the MCU has the advantages of low cost, small size, and low power consumption, which is beneficial to reducing the cost and size of the multi-port charging device.

[0057] It should be noted that since the detection units 110 in the detection module are the same, for the convenience of drawing, Figure 2 the reference numerals of the corresponding circuit elements in the two detection units 110 in [the figure] are the same and not distinguished. It should also be noted that for simplicity of expression, "grounding" is used above to represent connecting to the ground terminal GND of the multi-port charging device.

[0058] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A multi-port charging device, It is characterized in that include: Multiple charging ports, detection modules, control modules, switch modules and voltage regulation modules; The detection module includes a plurality of detection units, and the switch module includes a plurality of switch units; the plurality of charging interfaces, the plurality of switch units, and the plurality of detection units correspond to each other one by one; The voltage output end of the detection unit is electrically connected to the voltage end of the charging interface, the ground end of the charging interface is electrically connected to the first end of the switch unit and the first input end of the detection unit respectively, the second input end of the detection unit is electrically connected to the second end of the switch unit, the switch control input end of the switch unit is electrically connected to the switch control output end of the control module, and the state output end of the detection unit is electrically connected to the state input end of the control module; the detection unit is used to detect the connection state between the charging interface and the external device; the control module is used to receive the connection state between the charging interface and the external device fed back by each of the detection units, and send a switch control signal to the switch unit according to the connection state between the charging interface and the external device; The voltage output end of the voltage regulation module is electrically connected to the power supply end of the charging interface, the interface communication end of the voltage regulation module is electrically connected to the communication end of the charging interface, the control communication end of the voltage regulation module is electrically connected to the communication end of the control module, and the second end of the switch unit and the ground end of the voltage regulation module are both electrically connected to the ground end of the multi-port charging device; the control module is used to adjust the power output from the voltage output end of the voltage regulation module to the charging interface according to the connection status between the charging interface and the external device fed back by each detection unit; The detection unit includes: a first resistor, a second resistor, a first filter circuit, a second filter circuit and a detection chip; A first end of the first resistor is electrically connected to a first power supply end of the multi-port charging device, a second end of the first resistor is electrically connected to a power supply end of the charging interface, a ground end of the charging interface is electrically connected to a first end of the second resistor, and a second end of the second resistor is grounded; The first end of the first filter circuit is electrically connected to the first end of the second resistor and the first end of the switch unit, and the second end of the first filter circuit is electrically connected to the first input end of the detection chip; the first end of the second filter circuit is electrically connected to the second end of the switch unit and the ground end of the multi-port charging device, and the second end of the second filter circuit is electrically connected to the second input end of the detection chip; The first filter circuit and the second filter circuit are used for filtering; the detection chip is used to generate a status signal for characterizing the connection status between the charging interface and the external device according to the signals input from the first input end and the second input end of the detection chip, and the status signal includes a first level signal, a second level signal and a clock signal; the control module includes a microcontroller.

2. The multi-port charging device according to claim 1, It is characterized in that The detection chip includes a first comparator, a second comparator, an AND gate, a NAND gate, and a clock generator; The non-inverting input terminal of the first comparator and the non-inverting input terminal of the second comparator are both electrically connected to the second terminal of the first filtering circuit. The inverting input terminal of the first comparator is electrically connected to the second terminal of the second filtering circuit. The output terminal of the first comparator is electrically connected to the first input terminal of the AND gate; The inverting input terminal of the second comparator is electrically connected to the reference voltage terminal of the multi-port charging device. The output terminal of the second comparator is electrically connected to the first input terminal of the NAND gate. The output terminal of the clock generator is electrically connected to the second input terminal of the NAND gate. The output terminal of the NAND gate is electrically connected to the second input terminal of the AND gate; The output terminal of the AND gate is electrically connected to the control module.

3. The multi-port charging device according to claim 2, wherein, the detection chip further includes a debouncer. The first terminal of the debouncer is electrically connected to the output terminal of the first comparator. The second terminal of the debouncer is electrically connected to the first input terminal of the AND gate.

4. The multi-port charging device according to claim 2, wherein, the detection chip further includes a first switch, and the detection unit further includes a third resistor; The control terminal of the first switch is electrically connected to the output terminal of the AND gate. The first terminal of the first switch is electrically connected to the second terminal of the third resistor. The first terminal of the third resistor is electrically connected to the first power supply terminal of the multi-port charging device. The second terminal of the first switch is grounded.

5. The multi-port charging device according to claim 1, wherein, the detection unit further includes a first diode. The positive electrode of the first diode is electrically connected to the second terminal of the first resistor. The negative electrode of the first diode is electrically connected to the power supply terminal of the charging interface.

6. The multi-port charging device according to claim 1, wherein, the first filtering circuit includes a fourth resistor and a first capacitor; the second filtering circuit includes a fifth resistor and a second capacitor; The first terminal of the fourth resistor is electrically connected to the first terminal of the switch unit. The second terminal of the fourth resistor is electrically connected to the first terminal of the first capacitor. The second terminal of the first capacitor is grounded; The first terminal of the fifth resistor is electrically connected to the second terminal of the switch unit. The second terminal of the fifth resistor is electrically connected to the first terminal of the second capacitor. The second terminal of the second capacitor is grounded.

7. The multi-port charging device according to claim 1, wherein, the switch unit includes a metal-oxide-semiconductor field effect transistor.

8. The multi-port charging device according to claim 1, wherein, the charging interface includes a TYPE-A interface.

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