Voltage detection control circuit and charger

Abstract

According to the voltage detection control circuit and the charger provided by the invention, the voltage detection control circuit collects the voltage phases of the two commercial power access ports through the sampling circuit, and the controller judges whether the phases of the commercial power accessed to the two commercial power access ports are consistent or not; and the controller is used for controlling the on-off of the plurality of switching circuits, so that the voltage phase of the accessed mains supply is kept consistent, the power utilization safety of a user is improved, and the purpose of improving the input power is achieved.

Description

Technical Field

[0001] This application relates to the field of chargers, and more particularly to a voltage detection and control circuit and a charger. Background Technology

[0002] As people increasingly demand shorter battery charging times, chargers are constantly increasing their input power. However, the power output of household AC outlets is often limited; for example, a typical wall socket cannot output more than 10A. Exceeding this limit can cause circuit breakers to trip and may pose safety hazards. This restricts the power increase of chargers. To address this, many chargers in the industry have adopted a dual AC power parallel input method to increase input power.

[0003] However, the installation of sockets in many homes is often not standardized. Many three-wire sockets are not installed according to the standard configuration of neutral wire on the left and live wire on the right. It is common for different sockets in the same user's home to have different phases on the left and right sides. Directly connecting them in this way can cause a direct short circuit in the power grid, resulting in problems such as tripping. This also makes it impossible to achieve the goal of increasing input power by connecting two AC power wires in parallel to the charger.

[0004] Therefore, it is necessary to design a voltage detection and control circuit and a charger to solve the problem of inconsistent phases on both sides when two mains power lines are connected in parallel, so that users can increase the input power of the charger to shorten the charging time of the battery pack while ensuring safe power use. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a voltage detection and control circuit and a charger to solve the problem of inconsistent phases on both sides when two mains power lines are connected in parallel, thereby enabling users to increase the input power of the charger and shorten the charging time of the battery pack while ensuring safe power use.

[0006] The technical solution adopted by this application to solve the problem of the prior art is: a voltage detection and control circuit, the voltage detection and control circuit comprising:

[0007] Controller;

[0008] It has at least two input ports for connecting to an external power source to receive AC input;

[0009] Multiple switching circuits, wherein the first terminal of each of the multiple switching circuits is electrically connected to the controller, the second terminal of each of the multiple switching circuits is electrically connected to the input port, and the third terminal of each of the multiple switching circuits is electrically connected to the main load circuit;

[0010] a plurality of sampling circuits, one end of the plurality of sampling circuits is electrically connected to the input port, and the other end of the plurality of sampling circuits is electrically connected to the controller, and the plurality of sampling circuits are used to collect the input voltage phase of the input port and transmit the collected voltage phase to the controller;

[0011] The controller receives the voltage phase and performs phase judgment, and the controller outputs a control signal according to the phase judgment result to control the on and off of the switching circuit.

[0012] Further improvement is that the plurality of switching circuits includes a first switching circuit, a second switching circuit and a third switching circuit, and the input port includes at least a first input port and a second input port;

[0013] The first end of the first switching circuit is electrically connected to the controller, the second end of the first switching circuit is electrically connected to the first input port, and the third end of the first switching circuit is electrically connected to the main load loop;

[0014] The first end of the second switching circuit is electrically connected to the controller, the second end of the second switching circuit is electrically connected to the second input port, and the third end of the second switching circuit is electrically connected to the main load loop;

[0015] The first end of the third switching circuit is electrically connected to the controller, the second end of the third switching circuit is electrically connected to the second input port, and the second end of the contact of the third relay is electrically connected to the main load loop in a different connection mode from the second relay.

[0016] Further improvement is that the first switching circuit includes a first switch tube and a first relay;

[0017] The first end of the first switch tube is electrically connected to the controller, the second end of the first switch tube is electrically connected to the first end of the first relay, the third end of the first switch tube is grounded, the second end of the first relay is electrically connected to the first input port, and the third end of the first relay is electrically connected to the main load loop;

[0018] The second switching circuit includes a second switch tube and a second relay;

[0019] The first end of the second switch tube is electrically connected to the controller, the second end of the second switch tube is electrically connected to the first end of the second relay, the third end of the second switch tube is grounded, the second end of the second relay is electrically connected to the second input port, and the third end of the second relay is electrically connected to the main load loop;

[0020] The third switching circuit includes a third switch tube and a third relay;

[0021] The first end of the third switch tube is electrically connected to the controller, the second end of the third switch tube is electrically connected to the first end of the third relay, the third end of the third switch tube is grounded, the second end of the third relay is electrically connected to the second input port, and the third end of the third relay is electrically connected to the main load circuit in a connection mode different from that of the second relay.

[0022] Further improvement is that the plurality of sampling circuits comprises a first sampling circuit and a second sampling circuit.

[0023] One end of the first sampling circuit is electrically connected to the first input port, and the other end of the first sampling circuit is electrically connected to the controller.

[0024] One end of the second sampling circuit is electrically connected to the second input port, and the other end of the second sampling circuit is electrically connected to the controller.

[0025] Further improvement is that when the phases of the voltages collected by the first sampling circuit and the second sampling circuit are the same, the controller controls the first switch circuit and the second switch circuit to be turned on; when the phases of the voltages collected by the first sampling circuit and the second sampling circuit are different, the controller controls the first switch circuit and the third switch circuit to be turned on.

[0026] Further improvement is that when the phases of the voltages collected by the first sampling circuit and the second sampling circuit are the same, the controller outputs a control signal to the first switch tube and the second switch tube so as to make the first switch tube and the second switch tube closed, thereby making the first relay and the second relay powered to be closed; when the phases of the voltages collected by the first sampling circuit and the second sampling circuit are different, the controller outputs a control signal to the first switch tube and the third switch tube so as to make the first switch tube and the third switch tube closed, thereby making the first relay and the third relay closed.

[0027] Further improvement is that the switch tube comprises a triode.

[0028] Further improvement is that the main load circuit comprises an AC / DC conversion circuit, a DC / DC conversion circuit, and a load interface; the first end of the AC / DC conversion circuit is electrically connected to the switch circuit, the second end of the AC / DC conversion circuit is electrically connected to the controller, the third end of the AC / DC conversion circuit is electrically connected to the DC / DC conversion circuit, one end of the DC / DC conversion circuit is electrically connected to the third end of the AC / DC conversion circuit, and the other end of the DC / DC conversion circuit is electrically connected to the load interface.

[0029] Further improvement is that the control signal comprises a level signal.

[0030] Further improvement is that the charger comprises the voltage detection control circuit.

[0031] Compared with the prior art, the application has the following beneficial effects: the voltage phases of two power input ports are collected by the sampling circuit, the controller judges whether the phases of the power input from the two power input ports are consistent, and the controller controls the on-off of the multiple switching circuits to keep the voltage phases of the input power consistent, thereby improving the safety of user power consumption and achieving the purpose of improving the input power. BRIEF DESCRIPTION OF DRAWINGS

[0032] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings:

[0033] Figure 1 is a structural schematic diagram of an embodiment of the charger of the application.

[0034] Figure 2 is a structural schematic diagram of an embodiment of the voltage detection control circuit of the application.

[0035] Voltage detection control circuit 10 input port 110

[0036] First input port 111 second input port 112

[0037] First input port terminal A1, B1 second input port terminal A2, B2

[0038] Switching circuit 120 first switching circuit 121

[0039] First switching tube Q1 first relay K2

[0040] Second switching circuit 122 second switching tube Q2

[0041] Second relay K2 third switching circuit 123

[0042] Third switching tube Q3 third switching circuit K3

[0043] Sampling circuit 130 first sampling circuit T1

[0044] Second sampling circuit T2 controller 140

[0045] Main load loop 150 AC / DC conversion circuit 151

[0046] DC / DC conversion circuit 152 load interface 153 DETAILED DESCRIPTION

[0047] The following description will refer to the accompanying drawings, which illustrate example embodiments of the application. However, the application can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals refer to like or similar components throughout the specification.

[0048] The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "including", "includes", "having", "has", "a", "an", "one" or "said one" are used in this specification and / or claims, they are intended to be

[0049] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0050] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0051] The following will describe example embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the accompanying drawings are not necessarily shown to scale; rather, the same or similar components will be given the same or similar reference numerals or similar technical terms.

[0052] As Figure 1As shown, it is a structural schematic diagram of an embodiment of the charger of the present application. The present application proposes a voltage detection circuit 10, which comprises a plurality of input ports 110, a plurality of switch circuits 120, a plurality of sampling circuits 130, a controller 140 and a main load loop 150. One end of the plurality of input ports 110 is electrically connected with the switch circuit 120, and the other end of the plurality of input ports 110 is electrically connected with the sampling circuit 130, wherein the plurality of input ports 110 comprises a first input port 111 and a second input port 112. The first end of the plurality of switch circuits 120 is electrically connected with the controller 140, the second end of the plurality of switch circuits 120 is electrically connected with the plurality of input ports 110, and the third end of the plurality of switch circuits 120 is electrically connected with the main load loop, wherein the plurality of switch circuits 120 comprises a first switch circuit 121, a second switch circuit 122 and a third switch circuit 123. One end of the plurality of sampling circuits 130 is electrically connected with the plurality of switch circuits 120 one by one, and the second end of the plurality of sampling circuits 130 is electrically connected with the controller 140. The plurality of sampling circuits 130 are used to collect the input voltage phase of the plurality of input ports 110 and transmit the collected voltage phase to the controller 140. The controller 140 receives the above-mentioned voltage phase and performs phase judgment. According to the phase judgment result, a control signal is outputted to control the on-off of the plurality of switch circuits 120, wherein the plurality of sampling circuits 130 comprises a first sampling circuit T1 and a second sampling circuit T2.

[0053] Further, one end of the first sampling circuit T1 is electrically connected with the first input port 111, and the other end of the first sampling circuit T1 is electrically connected with the controller 140; one end of the first input port 111 is electrically connected with the first sampling circuit T1, and the other end of the first input port 111 is electrically connected with the first switch circuit 121; the first end of the first switch circuit 121 is electrically connected with the controller 140, the second end of the first switch circuit 121 is electrically connected with the first input port 111, and the third end of the first switch circuit 121 is electrically connected with the main load loop 150; the first end of the controller 140 is electrically connected with the first sampling circuit T1, the second end of the controller 140 is electrically connected with the first switch circuit 121, and the third end of the controller 140 is electrically connected with the main load loop 150. The first sampling circuit T1 collects the first voltage phase of the first input port 111 and transmits the collected first voltage phase to the controller 140.

[0054] One end of the second sampling circuit T2 is electrically connected to the second input port 112, and the other end of the second sampling circuit T2 is electrically connected to the controller 140; one end of the second input port 112 is electrically connected to the second sampling circuit T2, and the other end of the second input port 112 is electrically connected to the second switch circuit 122 and the third switch circuit 123; the first end of the second switch circuit 122 is electrically connected to the controller 140, the second end of the second switch circuit 122 is electrically connected to the second input port 112, and the third end of the second switch circuit 122 is electrically connected to the main load loop 150; the first end of the third switch circuit 123 is electrically connected to the controller 140, the second end of the third switch circuit 123 is electrically connected to the second input port 112, and the third end of the third switch circuit 123 is electrically connected to the main load loop 150; the first end of the controller 140 is electrically connected to the second sampling circuit T2, the second end of the controller 140 is electrically connected to the second switch circuit 122 and the third switch circuit 123, and the third end of the controller 140 is electrically connected to the main load loop 150; the second sampling circuit T2 collects the second voltage phase of the second input port 112 and transmits the collected second voltage phase to the controller 140.

[0055] The first sampling circuit T1 and the second sampling circuit T2 comprise a voltage transformer.

[0056] The main load loop 150 comprises an AC / DC conversion circuit 151, a DC / DC conversion circuit 152, and a load interface; the first end of the AC / DC conversion circuit 151 is electrically connected to the switch circuit 130, the second end of the AC / DC conversion circuit 151 is electrically connected to the controller 140, the third end of the AC / DC conversion circuit 151 is electrically connected to the DC / DC conversion circuit 152, one end of the DC / DC conversion circuit 152 is electrically connected to the AC / DC conversion circuit 151, and the other end of the DC / DC conversion circuit 152 is electrically connected to the load interface 153.

[0057] The controller receives the first voltage phase and the second voltage phase and determines whether the first voltage phase and the second voltage phase are the same; if the two phases are the same, the controller 140 outputs a control signal to control the first switch circuit 121 and the second switch circuit 122 to be turned on; if the two phases are not the same, the controller 140 outputs a control signal to control the first switch circuit 121 and the third switch circuit 123 to be turned on, so that the output phases of the first voltage phase and the second voltage phase are the same.

[0058] Further, the control signal comprises a level signal.

[0059] Reference Figure 2In an embodiment, the plurality of switching circuits comprise switching tubes and relays. The first switching circuit 121 comprises a first switching tube Q1 and a first relay K1; a first end of the first switching tube Q1 is electrically connected to the controller 140, a second end of the first switching tube Q1 is electrically connected to a first end of the first relay K1, a third end of the first switching tube Q1 is grounded, a second end of the first relay K1 is electrically connected to the first input port 111, wherein a third end of the first relay K1 is electrically connected to the main load circuit in a corresponding manner with the first end, that is, the first input port terminal A1 is electrically connected to the main load circuit line 1 through the contact closure of the first relay, and the first input port terminal B1 is electrically connected to the main load circuit line 2 through the contact closure of the first relay.

[0060] The second switching circuit 122 comprises a second switching tube Q2 and a second relay K2; a first end of the second switching tube Q2 is electrically connected to the controller 140, a second end of the second switching tube Q2 is electrically connected to a first end of the second relay K2, a third end of the second switching tube Q2 is grounded, a second end of the second relay K2 is electrically connected to the second input port, wherein a third end of the second relay K2 is electrically connected to the main load circuit in a corresponding manner with the first end, that is, the second input port terminal A2 is electrically connected to the main load circuit line 1 through the contact closure of the second relay, and the second input port terminal B2 is electrically connected to the main load circuit line 2 through the contact closure of the second relay.

[0061] The third switching circuit 123 comprises a third switching tube Q3 and a third relay K3; a first end of the third switching tube Q3 is electrically connected to the controller 140, a second end of the third switching tube Q3 is electrically connected to a first end of the third relay K3, a third end of the third switching tube Q3 is grounded, a second end of the third relay K3 is electrically connected to the second input port, wherein a third end of the third relay K3 is electrically connected to the main load circuit in a non-corresponding manner with the first end, that is, the second input port terminal A2 is electrically connected to the main load circuit line 2 through the contact closure of the third relay K3, and the second input port terminal B2 is electrically connected to the main load circuit line 1 through the contact closure of the third relay K3, and such non-corresponding manner can reverse the original phase.

[0062] The controller 140 receives the first voltage phase collected by the first sampling circuit and the second voltage phase collected by the second sampling circuit and judges whether the first voltage phase and the second voltage phase are the same. If the two phases are the same, the controller 140 outputs a high level signal to the first switch tube Q1 and the second switch tube Q2 to make the first switch tube Q1 and the second switch tube Q2 closed, so that the first relay K1 and the second relay K2 connected with the first switch tube Q1 and the second switch tube Q2 are powered to be closed. If the two phases are not the same, the controller 140 outputs a high level signal to the first switch tube Q1 and the third switch tube Q3 to make the first switch tube Q1 and the third switch tube Q3 closed, so that the first relay K1 and the third relay K3 connected with the first switch tube Q1 and the third switch tube Q3 are powered to be closed, so that the original opposite phase becomes the same phase, so that the output phases of the first voltage phase and the second voltage phase are the same.

[0063] Further, the above-mentioned switch tube includes a triode.

[0064] The application also proposes a charger, which comprises the above-mentioned voltage detection control circuit 10.

[0065] The detailed structure of the voltage detection control circuit 10 can refer to the above-mentioned embodiments, which will not be described here again. It can be understood that, since the above-mentioned voltage detection control circuit 10 is used in the charger of the application, the embodiments of the charger of the application include all the technical solutions of all the embodiments of the above-mentioned voltage detection control circuit 10, and the technical effects achieved are also completely the same, which will not be described here again.

[0066] In the above, the specific embodiments of the application are described with reference to the accompanying drawings. However, those skilled in the art can understand that various changes and replacements can be made to the specific embodiments of the application without departing from the spirit and scope of the application. These changes and replacements are all within the scope defined by the application.

Claims

1. A voltage detection control circuit, characterized by, The voltage detection control circuit comprises: a controller; at least two input ports for connecting with external power supply to receive AC input; a plurality of switch circuits, the first ends of the plurality of switch circuits being electrically connected with the controller, the second ends of the plurality of switch circuits being electrically connected with the input ports, and the third ends of the plurality of switch circuits being electrically connected with a main load loop; a plurality of sampling circuits, one end of the plurality of sampling circuits being electrically connected with the input ports, and the other end of the plurality of sampling circuits being electrically connected with the controller, the plurality of sampling circuits being used for collecting input voltage phases of the input ports and transmitting the collected voltage phases to the controller; the controller receives the voltage phases and makes phase judgment, and outputs control signals according to the phase judgment results to control the switch circuits to be turned on and turned off.

2. The voltage detection control circuit according to claim 1, wherein The plurality of switch circuits comprises a first switch circuit, a second switch circuit and a third switch circuit, and the input ports comprise at least a first input port and a second input port; the first end of the first switch circuit is electrically connected with the controller, the second end of the first switch circuit is electrically connected with the first input port, and the third end of the first switch circuit is electrically connected with the main load loop; the first end of the second switch circuit is electrically connected with the controller, the second end of the second switch circuit is electrically connected with the second input port, and the third end of the second switch circuit is electrically connected with the main load loop; the first end of the third switch circuit is electrically connected with the controller, the second end of the third switch circuit is electrically connected with the second input port, and the third end of the third switch circuit is electrically connected with the main load loop.

3. The voltage detection control circuit of claim 2, wherein The first switch circuit comprises a first switch tube and a first relay; the first end of the first switch tube is electrically connected with the controller, the second end of the first switch tube is electrically connected with the first end of the first relay, the third end of the first switch tube is grounded, the second end of the first relay is electrically connected with the first input port, and the third end of the first relay is electrically connected with the main load loop; The second switch circuit comprises a second switch tube and a second relay; the first end of the second switch tube is electrically connected with the controller, the second end of the second switch tube is electrically connected with the first end of the second relay, the third end of the second switch tube is grounded, the second end of the second relay is electrically connected with the second input port, and the third end of the second relay is electrically connected with the main load loop; The third switch circuit comprises a third switch tube and a third relay; the first end of the third switch tube is electrically connected with the controller, the second end of the third switch tube is electrically connected with the first end of the third relay, the third end of the third switch tube is grounded, the second end of the third relay is electrically connected with the second input port, and the third end of the third relay is electrically connected with the main load loop in a connection mode different from that of the second relay.

4. The voltage detection control circuit of claim 3, wherein The plurality of sampling circuits comprises a first sampling circuit and a second sampling circuit; One end of the first sampling circuit is electrically connected to the first input port, and the other end of the first sampling circuit is electrically connected to the controller. One end of the second sampling circuit is electrically connected to the second input port, and the other end of the second sampling circuit is electrically connected to the controller.

5. The voltage detection control circuit of claim 4, wherein, When the phases of the voltages collected by the first sampling circuit and the second sampling circuit are the same, the controller controls the first switch circuit and the second switch circuit to be turned on; when the phases of the voltages collected by the first sampling circuit and the second sampling circuit are different, the controller controls the first switch circuit and the third switch circuit to be turned on.

6. The voltage control circuit of claim 5, wherein, When the phases of the voltages collected by the first sampling circuit and the second sampling circuit are the same, the controller outputs a control signal to the first switch tube and the second switch tube, so that the first switch tube and the second switch tube are closed, and then the first relay and the second relay are powered on and closed; when the phases of the voltages collected by the first sampling circuit and the second sampling circuit are different, the controller outputs a control signal to the first switch tube and the third switch tube, so that the first switch tube and the third switch tube are closed, and then the first relay and the third relay are closed.

7. The voltage control circuit of claim 6, wherein, The switch tube comprises a triode.

8. The voltage detection control circuit of claim 1, wherein, The main load circuit comprises an AC / DC conversion circuit, a DC / DC conversion circuit and a load interface; a first end of the AC / DC conversion circuit is electrically connected to the switch circuit, a second end of the AC / DC conversion circuit is electrically connected to the controller, a third end of the AC / DC conversion circuit is electrically connected to the DC / DC conversion circuit, one end of the DC / DC conversion circuit is electrically connected to the third end of the AC / DC conversion circuit, and the other end of the DC / DC conversion circuit is electrically connected to the load interface.

9. The voltage detection control circuit of claim 1, wherein, The control signal comprises a level signal.

10. A charger characterized by comprising: The charger comprises the voltage detection control circuit according to any one of claims 1 to 9. The charger comprises the voltage detection control circuit according to any one of claims 1 to 9.

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