CN106340957B

CN106340957B - Power supply circuit switching device, power supply system and method

Info

Publication number: CN106340957B
Application number: CN201610983963.7A
Authority: CN
Inventors: 王红娟; 李运康
Original assignee: Inspur Financial Information Technology Co Ltd
Current assignee: Inspur Financial Information Technology Co Ltd
Priority date: 2016-11-09
Filing date: 2016-11-09
Publication date: 2020-02-14
Anticipated expiration: 2036-11-09
Also published as: CN106340957A

Abstract

The invention provides a power supply circuit switching device, a power supply system and a method, wherein the power supply circuit switching device comprises: the detection unit detects the current electric quantity value of the peripheral first power supply equipment and sends the current electric quantity value to the controller; the controller is used for presetting a first threshold value and a second threshold value; when the first power supply equipment of the peripheral equipment is judged to be in a power supply state, and when the current electric quantity is lower than a first threshold value, a first switching instruction is sent to a switching circuit; when the first peripheral power supply equipment is judged not to be in a power supply state and the current electric quantity reaches a second threshold value, sending a second switching instruction to the switching circuit; when receiving the first switching instruction, the switching circuit cuts off the power supply of the first power supply equipment of the peripheral equipment and conducts the power supply of the second power supply equipment of the peripheral equipment; and when a second switching instruction is received, cutting off the power supply of the peripheral second power supply equipment and switching on the power supply of the peripheral first power supply equipment. The scheme can realize automatic switching between the power supply circuits.

Description

Power supply circuit switching device, power supply system and method

Technical Field

The present invention relates to the field of electronic information technologies, and in particular, to a power supply circuit switching device, a power supply system, and a power supply method.

Background

With the wide use of mobile electronic devices such as mobile phones and tablet computers, the mobile electronic devices can be charged in an emergency in public places such as markets, supermarkets, hospitals, stations and airports for convenience of citizens, and therefore self-service charging terminals are arranged in various public places.

Currently, a self-service charging terminal generally provides a charging voltage for a user by using a voltage provided by a mains supply or a voltage provided by a storage battery power supply. When the power supply of the mains supply is abnormal and the self-service charging terminal stops working, the storage battery needs to be started manually to supply power. And when the power supply of the commercial power supply is recovered to the normal power supply, the storage battery is manually stopped to supply power, and the commercial power supply is restarted. Therefore, the existing mode cannot realize automatic switching between power supply circuits.

Disclosure of Invention

The embodiment of the invention provides a power supply circuit switching device, a power supply system and a power supply method, which are used for realizing automatic switching among power supply circuits.

In a first aspect, an embodiment of the present invention provides a power supply circuit switching device, where the power supply circuit switching device is connected to a first power supply device of an external device and a second power supply device of the external device, respectively, and includes: the device comprises a detection unit, a controller and a switching circuit;

the detection unit is used for detecting the current electric quantity value of first power supply equipment of the peripheral equipment and sending the detected current electric quantity value to the controller;

the controller is used for setting a first threshold value and a second threshold value; judging whether a first power supply device of the peripheral is in a power supply state, if so, sending a first switching instruction to the switching circuit when the current electric quantity detected by the detection unit is lower than the first threshold value; judging whether a first power supply device of the peripheral is in a power supply state, if not, sending a second switching instruction to the switching circuit when the current electric quantity detected by the detection unit reaches the second threshold value;

the switching circuit is used for cutting off the power supply of first power supply equipment of the peripheral equipment and conducting the power supply of second power supply equipment of the peripheral equipment when receiving a first switching instruction sent by the controller; and when a second switching instruction sent by the controller is received, cutting off the power supply of second power supply equipment of the peripheral equipment, and conducting the power supply of first power supply equipment of the peripheral equipment.

Preferably, the switching circuit includes: an MOS tube;

the source electrode of the MOS tube is respectively connected with the first power supply equipment of the peripheral and the use terminal of the peripheral;

the drain electrode of the MOS tube is connected with the peripheral second power supply equipment, and the grid electrode of the MOS tube is connected with the controller;

the first switching instruction comprises: a "0V" level signal;

the second switching instruction comprises: a "49V" level signal;

the MOS tube is used for conducting the source electrode and the drain electrode when receiving a 0V level signal in the first switching instruction;

and the MOS tube is used for not conducting the source electrode and the drain electrode when receiving a '49V' level signal in the second switching instruction.

Preferably, the switching circuit further includes: a relay;

the relay, comprising: a first relay contact, a second relay contact, and a third relay contact; the first relay contact is respectively connected with the peripheral first power supply equipment and the third relay contact, the second relay contact is respectively connected with the peripheral second power supply equipment and the third relay contact, and the third relay contact is connected with a peripheral use terminal;

the relay is used for disconnecting the first relay contact from the third relay contact when a first switching instruction sent by the controller is received, closing the second relay contact and the third relay contact, and supplying power to a peripheral user terminal by using peripheral second power supply equipment through the third relay contact;

the relay is used for closing the first relay contact and the third relay contact when receiving a second switching instruction sent by the controller, disconnecting the second relay contact and the third relay contact, and supplying power to a peripheral user terminal by the third relay contact through a peripheral first power supply device.

Preferably, further comprising: an overvoltage protector;

and one end of the overvoltage protector is connected with the switching circuit, the other end of the overvoltage protector is connected with an external use terminal, and the overvoltage protector is used for setting a voltage threshold value, monitoring the power supply voltage transmitted by the switching circuit in real time, and stopping receiving the power supply voltage transmitted by the switching circuit when the fact that the power supply voltage transmitted by the switching circuit reaches the voltage threshold value is determined.

Preferably, the first and second electrodes are formed of a metal,

further comprising: an overcurrent protector;

and one end of the overcurrent protector is connected with the switching circuit, the other end of the overcurrent protector is connected with an external use terminal, and the overcurrent protector is used for setting a current threshold value, monitoring the power supply current transmitted by the switching circuit in real time, and stopping receiving the power supply current transmitted by the switching circuit when the power supply current transmitted by the switching circuit is determined to reach the current threshold value.

Preferably, the controller includes: the system comprises a first calculation subunit and a first instruction sending subunit; the first calculating subunit is configured to receive the current electric quantity value sent by the detecting unit, and calculate, according to a formula (1), a current actual electric quantity value corresponding to the current electric quantity value;

wherein, Q is₁The current actual electric quantity value corresponding to the current electric quantity value is used for representing the current actual electric quantity value; said Q_iFor characterizing the current electric quantity value; the above-mentioned

A loss factor for characterizing the electrical quantity; a is described₁For characterizing the first electrical quantity correction factor;

and the first instruction sending subunit is configured to send a first switching instruction to the switching circuit when the current actual electric quantity value is lower than the first threshold value.

Preferably, the first and second electrodes are formed of a metal,

the controller includes: a second calculating subunit and a second instruction sending subunit;

the second calculating subunit is configured to receive the current electric quantity value sent by the detecting unit, and calculate, according to a formula (2), a current actual electric quantity value corresponding to the current electric quantity value;

A loss factor for characterizing the electrical quantity; a is described₂For characterizing the second electrical quantity correction factor;

and the second instruction sending subunit is configured to send a second switching instruction to the switching circuit when the current actual charge value reaches the second threshold value.

Preferably, further comprising: an independent switch submodule;

the independent switch module is connected with the controller and used for controlling the controller to independently control the switching of the first switching instruction and the second switching instruction.

Preferably, the controller includes: a first control contact and a second control contact;

the first control contact is connected with the detection unit and controls the controller to output the first switching instruction or the second switching instruction according to the current electric quantity transmitted by the detection unit;

the second control contact is connected with the independent switch module and controls the controller to output the first switching instruction or the second switching instruction according to the opening instruction or the closing instruction of the independent switch module.

In a second aspect, an embodiment of the present invention provides a power supply system, including: a first power supply device, a second power supply device, a user terminal, and the power supply circuit switching device according to any one of the first aspect;

the first power supply equipment stops supplying power to the user terminal when the switching circuit in the power supply circuit switching device receives a first switching instruction; when the switching circuit in the power supply circuit switching device receives a second switching instruction, supplying power to the using terminal;

the second power supply equipment is used for supplying power to the using terminal when the switching circuit in the power supply circuit switching device receives a first switching instruction; when the switching circuit in the power supply circuit switching device receives a second switching instruction, stopping supplying power to the using terminal;

and the using terminal receives power supply provided by the first power supply equipment or the second power supply equipment through the power supply circuit switching device.

Preferably, the first and second electrodes are formed of a metal,

the first power supply equipment comprises any one of a storage battery, solar power supply equipment and wind power supply equipment;

the second power supply equipment comprises any one of municipal power supply equipment and generator power supply equipment.

Preferably, the first and second electrodes are formed of a metal,

the use terminal is an automatic charging terminal.

In a third aspect, an embodiment of the present invention provides a power supply circuit switching method, where the power supply circuit switching method includes:

presetting a first threshold and a second threshold;

detecting a current electric quantity value of a first power supply device of the peripheral equipment;

judging whether a first power supply device of the peripheral is in a power supply state, if so, cutting off the power supply of the first power supply device of the peripheral and switching on the power supply of a second power supply device of the peripheral when the current electric quantity is lower than the first threshold;

and judging whether the first power supply equipment of the peripheral equipment is in a power supply state, if not, cutting off the power supply of the second power supply equipment of the peripheral equipment and switching on the power supply of the first power supply equipment of the peripheral equipment when the current electric quantity reaches the second threshold value.

The embodiment of the invention provides a power supply circuit switching device, a power supply system and a power supply method. The detection unit is used for detecting the current electric quantity value of first power supply equipment of the peripheral equipment and sending the detected current electric quantity value to the controller, the controller is used for judging whether the first power supply equipment of the peripheral equipment is in a power supply state, if so, when the current electric quantity detected by the detection unit is lower than a preset first threshold value, a first switching instruction is sent to the switching circuit, and the switching circuit cuts off the power supply of the first power supply equipment of the peripheral equipment according to the first switching instruction and switches on the power supply of second power supply equipment of the peripheral equipment. And the controller sends a second switching instruction to the switching circuit when judging whether the first power supply equipment of the peripheral equipment is in a power supply state or not, and if not, when the current electric quantity detected by the detection unit reaches the second threshold value, the switching circuit cuts off the power supply of the second power supply equipment of the peripheral equipment according to the second switching instruction and switches on the power supply of the first power supply equipment of the peripheral equipment. Therefore, in the scheme, the current electric quantity of the first power supply equipment of the peripheral equipment is obtained under the condition that the first power supply equipment of the peripheral equipment is in the power supply state or the non-power supply state respectively. And according to the relationship between the current electric quantity and the preset threshold value, sending different switching instructions to the switching circuit according to the relationship between the current electric quantity and the preset threshold value, so that the switching circuit realizes the switching between the peripheral first power supply equipment and the peripheral second power supply equipment according to the different switching instructions, and therefore, the scheme can realize the automatic switching between the power supply circuits.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a power supply circuit switching device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a power supply circuit switching device according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a power supply circuit switching device according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a power supply circuit switching device according to another embodiment of the present invention;

fig. 5 is a schematic structural diagram of a power supply circuit switching device according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a power supply circuit switching device according to another embodiment of the present invention;

fig. 7 is a schematic structural diagram of a power supply circuit switching device according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram of a power supply circuit switching device according to another embodiment of the present invention;

fig. 9 is a schematic structural diagram of a power supply circuit switching device according to another embodiment of the present invention;

fig. 10 is a schematic structural diagram of a power supply system according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a power supply system according to another embodiment of the present invention;

fig. 12 is a flowchart of a power supply circuit switching method according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a power supply circuit switching apparatus, where the power supply circuit switching apparatus is connected to a first power supply device of an external device and a second power supply device of the external device, respectively, and includes: a detection unit 101, a controller 102, and a switching circuit 103;

the detection unit 101 is configured to detect a current power value of a first power supply device of the peripheral device, and send the detected current power value to the controller 102;

the controller 102 is configured to set a first threshold and a second threshold; judging whether a first power supply device of the peripheral is in a power supply state, if so, sending a first switching instruction to the switching circuit 103 when the current electric quantity detected by the detection unit is lower than the first threshold value; judging whether a first power supply device of the peripheral is in a power supply state, if not, sending a second switching instruction to the switching circuit 103 when the current electric quantity detected by the detection unit reaches the second threshold value;

the switching circuit 103 is configured to, when receiving a first switching instruction sent by the controller 102, cut off power supply of a first power supply device of the peripheral and turn on power supply of a second power supply device of the peripheral; when a second switching instruction sent by the controller 102 is received, the power supply of the second power supply device of the peripheral is cut off, and the power supply of the first power supply device of the peripheral is conducted.

According to the embodiment, the detection unit is used for detecting the current electric quantity value of the first power supply device of the peripheral and sending the detected current electric quantity value to the controller, the controller is used for judging whether the first power supply device of the peripheral is in a power supply state, if yes, when the current electric quantity detected by the detection unit is lower than a preset first threshold value, a first switching instruction is sent to the switching circuit, and the switching circuit cuts off the power supply of the first power supply device of the peripheral and conducts the power supply of the second power supply device of the peripheral according to the first switching instruction. And the controller sends a second switching instruction to the switching circuit when judging whether the first power supply equipment of the peripheral equipment is in a power supply state or not, and if not, when the current electric quantity detected by the detection unit reaches the second threshold value, the switching circuit cuts off the power supply of the second power supply equipment of the peripheral equipment according to the second switching instruction and switches on the power supply of the first power supply equipment of the peripheral equipment. It can be seen that in the present scheme, the first power supply device of the peripheral device obtains the current electric quantity of the first power supply device of the peripheral device respectively under the condition of the power supply state or the non-power supply state, and sends different switching instructions to the switching circuit according to the relationship between the current electric quantity and the preset threshold value and according to the relationship between the current electric quantity and the preset threshold value, so that the switching circuit realizes the switching between the first power supply device of the peripheral device and the second power supply device of the peripheral device according to the different switching instructions, and therefore, the present scheme can realize the automatic switching between the power supply circuits.

In one embodiment of the present invention, as shown in fig. 2, in order to realize the switching between the power supply circuits, the switching circuit 103 may include a MOS transistor 201.

The source S of the MOS tube 201 is respectively connected with the first power supply equipment of the peripheral and the use terminal of the peripheral;

the drain electrode D of the MOS tube 201 is connected with the peripheral second power supply equipment, and the grid electrode G of the MOS tube is connected with the controller 102;

the first switching instruction comprises: a "0V" level signal;

the second switching instruction comprises: a "49V" level signal;

the MOS transistor 201 is configured to, when receiving a "0V" level signal in the first switching instruction, turn on the source S and the drain D;

the MOS transistor 201 is configured to not conduct the source S and the drain D when receiving a "49V" level signal in the second switching command.

The type of the MOS transistor may be determined according to specific service requirements. In addition, the level signal corresponding to the first switching instruction is a low level signal, and the corresponding value may be changed according to a specific service requirement. The level signal corresponding to the second switching instruction is a high level signal, and the corresponding value may also be changed according to the specific service requirement.

When the MOS tube receives a 0V level signal in the first switching instruction, the source electrode S and the drain electrode D in the MOS tube are switched on, so that the power supply of the first peripheral power supply equipment is cut off, and the power supply of the second peripheral power supply equipment is switched on.

When the MOS tube receives a '49V' level signal in the second switching instruction, the source S and the drain D in the MOS tube are not conducted, so that the power supply of the peripheral second power supply equipment is cut off, and the power supply of the peripheral first power supply equipment is conducted.

According to the above embodiment, the switching circuit includes the MOS transistor, and the MOS transistor receives the level signals corresponding to the different switching commands sent by the controller through the gate, and performs corresponding actions according to the received level signals corresponding to the different switching commands. And when a 0V level signal in the first switching instruction is received, the source electrode and the drain electrode in the MOS tube are conducted, so that the power supply of the first peripheral power supply equipment is cut off, and the power supply of the second peripheral power supply equipment is conducted. When a '49V' level signal in the second switching instruction is received, the source electrode and the drain electrode in the MOS tube are not conducted, so that the power supply of the peripheral second power supply device is cut off, and the power supply of the peripheral first power supply device is conducted. Thus, an automatic switching of the different supply circuits is achieved.

In one embodiment of the present invention, as shown in fig. 3, in order to realize switching between power supply circuits, the switching circuit 103 may further include a relay 301.

The relay 301 includes: a first relay contact, a second relay contact, and a third relay contact; the first relay contact is respectively connected with the peripheral first power supply equipment and the third relay contact, the second relay contact is respectively connected with the peripheral second power supply equipment and the third relay contact, and the third relay contact is connected with a peripheral use terminal;

the relay 301 is configured to disconnect the first relay contact from the third relay contact when receiving a first switching instruction sent by the controller 102, close the second relay contact and the third relay contact, and supply power to a peripheral user terminal through a peripheral second power supply device by using the third relay contact;

the relay 301 is configured to, when receiving a second switching instruction sent by the controller 102, close the first relay contact and the third relay contact, disconnect the second relay contact and the third relay contact, and supply power to a peripheral user terminal through a peripheral first power supply device by using the third relay contact.

The type of the relay can be determined according to specific service requirements, for example, an electromagnetic relay can be selected.

According to the embodiment, the switching circuit comprises the relay, and the relay conducts or cuts off different relay contacts according to different switching instructions sent by the controller. When the first switching instruction is received, the first relay contact is disconnected with the third relay contact, the second relay contact is closed with the third relay contact, and the second power supply equipment of the peripheral equipment is used for supplying power to the use terminal of the peripheral equipment. And when a second switching instruction is received, the first relay contact and the third relay contact are closed, the second relay contact and the third relay contact are disconnected, and the first power supply equipment of the peripheral equipment is used for supplying power to the use terminal of the peripheral equipment. Thus, an automatic switching of the different supply circuits is achieved.

In one embodiment of the present invention, as shown in fig. 4, in order to protect the usage terminal of the peripheral device in case that the supply voltage provided by the first power supply device of the peripheral device or the second power supply device of the peripheral device is abnormal, the supply circuit switching device may include an overvoltage protector 401.

The overvoltage protector 401 has one end connected to the switching circuit 103 and the other end connected to an external user terminal, and is configured to set a voltage threshold, monitor the power supply voltage transmitted by the switching circuit in real time, and stop receiving the power supply voltage transmitted by the switching circuit when it is determined that the power supply voltage transmitted by the switching circuit reaches the voltage threshold.

The overvoltage protector can be determined according to specific service requirements, for example, an overvoltage protector with a gapless structure can be selected.

The voltage threshold may include a first voltage threshold and a second voltage threshold. And when the power supply voltage transmitted by the switching circuit reaches a first voltage threshold value in real time, stopping receiving the power supply voltage transmitted by the switching circuit so as to protect an external use terminal from being damaged. And when the power supply voltage transmitted by the switching circuit reaches a second voltage threshold value in real time, the overvoltage protector starts to stabilize the voltage, so that an external use terminal stably works. And when the power supply voltage transmitted by the switching circuit is monitored to be lower than a second voltage threshold value in real time, stopping receiving the power supply voltage transmitted by the switching circuit so as to protect an external use terminal from being damaged.

According to the above embodiment, the power supply circuit switching device may further include an overvoltage protector that monitors the power supply voltage transmitted by the switching circuit in real time, and stops receiving the power supply voltage transmitted by the switching circuit when it is determined that the power supply voltage transmitted by the switching circuit reaches a preset voltage threshold, so that the peripheral user terminal is protected and the peripheral user terminal is prevented from being damaged when the power supply voltage provided by the first power supply device or the second power supply device of the peripheral device of the switching circuit is abnormal.

In one embodiment of the present invention, as shown in fig. 5, in order to protect the usage terminal of the peripheral device in the case that the supply current provided by the first power supply device of the peripheral device or the second power supply device of the peripheral device is abnormal, the supply circuit switching device may include an overcurrent protector 501.

The overcurrent protector 501 has one end connected to the switching circuit 103 and the other end connected to an external user terminal, and is configured to set a current threshold, monitor the supply current transmitted by the switching circuit 103 in real time, and stop receiving the supply current transmitted by the switching circuit 103 when it is determined that the supply current transmitted by the switching circuit 103 reaches the current threshold.

The overcurrent protector can be determined according to specific service requirements, for example, a current limiting type overcurrent protector can be selected.

The current threshold value can be determined according to specific service requirements, the overcurrent protector is used for monitoring the power supply current transmitted by the switching circuit in real time, and when the fact that the power supply current transmitted by the switching circuit reaches the current threshold value is determined, the power supply current transmitted by the switching circuit stops being received. So as to avoid damage to the peripheral user terminal after the current exceeds the current threshold.

According to the above embodiment, the power supply circuit switching device may further include an overcurrent protector that monitors the power supply current transmitted by the switching circuit in real time, and stops receiving the power supply current transmitted by the switching circuit when it is determined that the power supply current transmitted by the switching circuit reaches a preset current threshold. Therefore, under the condition that the switching circuit receives the power supply current provided by the first power supply equipment of the peripheral or the second power supply equipment of the peripheral, the use terminal of the peripheral is protected, and the use terminal of the peripheral is prevented from being damaged.

In one embodiment of the present invention, as shown in fig. 6, the controller 102 may include: a first calculation subunit 601 and a first instruction sending subunit 602.

The first calculating subunit 601 is configured to receive the current electric quantity value sent by the detecting unit 101, and calculate a current actual electric quantity value corresponding to the current electric quantity value according to a formula (1);

the first instruction sending subunit 602 is configured to send a first switching instruction to the switching circuit 103 when the current actual charge value is lower than the first threshold.

There may be a conversion of electrical energy to thermal energy, or other form of loss, due to the first power supply device. Therefore, the current electric quantity value sent by the detection unit needs to be correspondingly corrected and calculated according to the formula (1) to obtain an actual electric quantity value corresponding to the current circuit value.

Loss factor of electric quantity in formula (1)And a first electric quantity correction coefficient A₁The specific value may be determined according to specific service requirements. Calculating the current actual electric quantity value corresponding to the current electric quantity value by using a formula (1) according to the determined numerical value and the received current electric quantity value, comparing the obtained current actual electric quantity value with a first threshold value, and determining that the current actual electric quantity value is lower than the first threshold valueAnd when a preset first threshold value is reached, sending a first switching instruction to a switching circuit so that the switching circuit cuts off the power supply of first power supply equipment of the peripheral and conducts the power supply of second power supply equipment of the peripheral.

According to the above embodiment, the controller may include a first calculating subunit and a first instruction sending subunit, where the first calculating subunit calculates, according to the current electric quantity value, a current actual electric quantity value corresponding to the current electric quantity value by using a calculation formula; and the first instruction sending subunit sends a first switching instruction to the switching circuit when the current actual electric quantity value is lower than a first threshold value. Since the relation between the current actual electric quantity value and the first threshold value is used, the sending of the first switching instruction is not delayed.

In one embodiment of the present invention, as shown in fig. 7, the controller may include: a second calculation subunit 701 and a second instruction sending subunit 702.

The second calculating subunit 701 is configured to receive the current electric quantity value sent by the detecting unit 101, and calculate a current actual electric quantity value corresponding to the current electric quantity value according to a formula (2);

the second instruction sending subunit 702 is configured to send a second switching instruction to the switching circuit 103 when the current actual charge value reaches the second threshold value.

Loss factor of electric quantity in equation (2)

And a first electric quantity correction coefficient A₁The specific value may be determined according to specific service requirements. And calculating a current actual electric quantity value corresponding to the current electric quantity value by using a formula (2) according to the determined numerical value and the received current electric quantity value, comparing the obtained current actual electric quantity value with a second threshold value, and sending a second switching instruction to the switching circuit when the current actual electric quantity value is determined to reach the preset second threshold value, so that the switching circuit switches on the power supply of the first power supply equipment of the peripheral equipment and switches off the power supply of the second power supply equipment of the peripheral equipment.

According to the above embodiment, the controller may include a second calculating subunit and a second instruction sending subunit, where the second calculating subunit calculates, according to the current electric quantity value, a current actual electric quantity value corresponding to the current electric quantity value by using a calculation formula; and the second instruction sending subunit sends a second switching instruction to the switching circuit when the current actual electric quantity value reaches a second threshold value. Since the relation between the current actual electric quantity value and the second threshold value is used, the sending of the second switching instruction is not delayed.

In one embodiment of the present invention, as shown in fig. 8, the power supply circuit switching apparatus may further include an independent switch module 801.

The independent switch module 801 is connected to the controller 102, and is configured to control the controller 102 to independently control switching of outputting the first switching instruction and the second switching instruction.

When the first power supply device of the peripheral is in a power supply state, when the current electric quantity detected by the detection unit is not lower than the first threshold, a first switching instruction needs to be sent to the switching circuit. When the first power supply device of the peripheral is not in a power supply state, when the current electric quantity detected by the detection unit does not reach the second threshold value, a second switching instruction needs to be sent to the switching circuit. At this time, the independent switch module is required to independently control the first switching instruction or the second switching instruction to be sent to the switching circuit.

According to the embodiment, the controller is independently controlled to output the first switching instruction and the second switching instruction for switching through the independent switch module, so that the output of the first switching instruction or the second switching instruction is controlled according to specific service requirements, and the operation is flexible.

In one embodiment of the present invention, as shown in fig. 9, when the controller 102 is independently controlled by the independent switch module 801 to output the first switching command or the second switching command for switching, two control contacts need to be disposed in the controller 102, that is: a first control contact 901 and a second control contact 902.

The first control contact 901 is connected to the detection unit 101, and controls the controller 102 to output the first switching instruction or the second switching instruction according to the current electric quantity transmitted by the detection unit 101;

the second control contact 902 is connected to the independent switch module 801, and controls the controller 102 to output the first switching instruction or the second switching instruction according to an on instruction or an off instruction of the independent switch module 801.

In order to ensure that the controller outputs corresponding level signals without confusion, the controller comprises: the detection device comprises a first control contact and a second control contact, wherein the two control contacts are respectively connected with the detection unit and the independent switch module.

According to the embodiment, the controller comprises two control contacts, wherein the first control contact is connected with the detection unit, the second control contact is connected with the independent switch module to respectively control the controller to output the first switching instruction or the second switching instruction, and the two control contacts are two independent contacts and are respectively connected with corresponding elements, so that the controller can be ensured not to be influenced when the controller receives corresponding work of the detection unit or the independent switch module.

As shown in fig. 10, an embodiment of the present invention provides a power supply system including: a first power supply apparatus 1001, a second power supply apparatus 1002, a use terminal 1003, and the power supply circuit switching device 1004;

the first power supply apparatus 1001 configured to stop power supply to the user terminal 1003 when the switching circuit in the power supply circuit switching device 1004 receives a first switching instruction; when the switching circuit in the power supply circuit switching device 1004 receives a second switching instruction, power is supplied to the user terminal 1003;

the second power supply device 1002 configured to supply power to the user terminal 1003 when the switching circuit in the power supply circuit switching apparatus 1004 receives a first switching instruction; when the switching circuit in the power supply circuit switching device 1003 receives a second switching instruction, stopping power supply to the user terminal 1003;

the user terminal 1003 receives power supplied from the first power supply apparatus 1001 or the second power supply apparatus 1002 through the power supply circuit switching device 1004.

According to the above embodiment, the power supply system includes the first power supply device, the second power supply device, the user terminal, and the power supply circuit switching device, and switching of power supply to the user terminal between the first power supply device and the second power supply device is realized by the power supply circuit switching device.

In an embodiment of the present invention, the first power supply apparatus 1001 may include any one of a storage battery, a solar power supply apparatus, and a wind power supply apparatus;

the second power supply device 1002 may include any one of a municipal power supply device and a generator power supply device;

in one embodiment of the present invention, the user terminal 1003 is an automatic charging terminal.

The following describes a power supply system provided in an embodiment of the present invention, taking an example that the power supply system includes a first power supply device as a solar power supply device, a second power supply device as a commercial power supply device, and a user terminal as an automatic charging terminal and a power supply circuit switching device, as shown in fig. 11, the power supply system may include:

the system comprises a solar power supply device 1101, a commercial power supply device 1102, a power supply circuit switching device 1103 and an automatic charging terminal 1104;

the power supply circuit switching device 1103 includes: a detection unit 11031, a controller 11032, a switching circuit 11033, an overvoltage protector 11034, an overcurrent protector 11035 and an independent switch module 11036. Wherein the controller 11032 includes: a first computing sub-unit 110321, a second computing sub-unit 110322, a first command issuing sub-unit 110323, a second command issuing sub-unit 110324, a first control contact 110325, and a second control contact 110326. The switching circuit 11033 includes a MOS transistor 110331.

The solar power supply device 1101 is connected with the detection unit 11031 in the power supply circuit switching device;

in this embodiment, the solar power supply device may include at least one solar panel, at least one battery, and a protection circuit module; each solar panel is used for receiving externally input solar energy, converting the solar energy into electric energy and transmitting the electric energy to the at least one battery; each battery is used for receiving the electric energy transmitted by the solar panel and storing the electric energy; the protection circuit module is configured to set a third threshold and a fourth threshold, detect a current electric quantity in each battery, and trigger the target battery to receive the electric energy transmitted by the solar panel when the current electric quantity of the target battery is smaller than the third threshold; when the current electric quantity of the target battery reaches the fourth threshold value, triggering the target battery to stop receiving the electric energy transmitted by the solar panel.

In addition, the solar power supply device in this embodiment may also be replaced by another power supply device, such as a wind power supply device, and the wind power supply device may include: the system comprises at least one windmill, at least one battery and a protection circuit module; each windmill is used for receiving externally input wind energy, converting the wind energy into electric energy and transmitting the electric energy to the at least one battery; each battery is used for receiving the electric energy transmitted by the windmill and storing the electric energy; the protection circuit module is configured to set a fifth threshold and a sixth threshold, detect a current electric quantity in each battery, and trigger the target battery to receive the electric energy transmitted by the windmill when the current electric quantity of the target battery is detected to be smaller than the fifth threshold; when the current electric quantity of the target battery is detected to reach the sixth threshold value, the target battery is triggered to stop receiving the electric energy transmitted by the windmill.

The detecting unit 11031 in the power supply circuit switching device 1103 is configured to detect a current electric quantity value of a battery in the solar power supply device 1101, and send the detected current electric quantity value to the controller 11032.

The controller 11032 is configured to set a first threshold value and a second threshold value. The values of the first threshold and the second threshold may be determined according to specific service requirements. The controller 11032 receives the current electric quantity value sent by the detection unit 11031 and judges whether the solar power supply device 1101 is in a power supply state, whether the solar power supply device 1101 has current output or not can be detected by the controller 11032 in the judging process, when the current output exists, it is determined that the solar power supply device 1101 is in the power supply state, and when the current output does not exist, it is determined that the solar power supply device 1101 is not in the power supply state.

When the controller 11032 determines that the solar power supply device 1101 is in a power supply state, the first calculating subunit 110321 is utilized to calculate a current actual power value corresponding to the current power value according to the formula (1) and according to the received current power value;

A loss factor for characterizing the electrical quantity; a is described₁For characterizing the first electrical quantity correction factor; decrease in the thickness of the steelLoss factor

And a first electric quantity correction coefficient A₁The specific value may be determined according to specific service requirements. The current actual electric quantity value is calculated by using the formula (1), and the obtained current actual electric quantity value is compared with the first threshold value by using the first command sending subunit 110323, and when the current actual electric quantity value is determined to be lower than the first threshold value, a first switching command is sent to the MOS transistor 110331 in the switching circuit 11033.

The source electrode of the MOS transistor 110331 is respectively connected with the solar power supply device 1101 and the peripheral user terminal; the drain of the MOS 110331 is connected to the mains supply device 1102, and the gate of the MOS 110331 is connected to the controller 11032;

when the MOS transistor 110331 receives a "0V" level signal in the first switching command, the source and the drain are turned on; the power supply of the solar power supply device 1101 is cut off, and the power supply of the commercial power supply device 1102 is conducted. If the MOS tube is not adopted, a relay can be used; the relay is used for disconnecting the first relay contact from the third relay contact when receiving a first switching instruction sent by the controller, closing the second relay contact and the third relay contact, and supplying power to a peripheral user terminal by using peripheral second power supply equipment through the third relay contact.

When the controller 11032 determines that the solar power supply device 1101 is not in the power supply state, the second calculating subunit 110322 is utilized to calculate the current actual power value corresponding to the current power value according to the formula (2) according to the received current power value;

A loss factor for characterizing the electrical quantity; a is described₂For characterizing the second electrical quantity correction factor; loss factor

And a first electric quantity correction coefficient A₁The specific value may be determined according to specific service requirements. The current actual electric quantity value is calculated by using the formula (2), and the obtained current actual electric quantity value is compared with the second threshold value by using the second instruction sending subunit 110324, and when it is determined that the current actual electric quantity value reaches the second threshold value, a second switching instruction is sent to the MOS transistor 110331 in the switching circuit 11033.

And when the MOS tube receives a '49V' level signal in the second switching instruction, the source electrode and the drain electrode are not conducted. And cutting off the power supply of the commercial power supply equipment and switching on the power supply of the solar power supply equipment. If the MOS tube is not adopted, a relay can be used; the relay is used for closing the first relay contact and the third relay contact when receiving a second switching instruction sent by the controller, disconnecting the second relay contact and the third relay contact, and supplying power to a peripheral user terminal by the third relay contact through a peripheral first power supply device.

One end of the overvoltage protector 11034 is connected with the switching circuit 11033, and the other end of the overvoltage protector is connected with the automatic charging terminal 1104, and the overvoltage protector 11034 is used for setting a voltage threshold value, monitoring the power supply voltage transmitted by the switching circuit in real time, and stopping receiving the power supply voltage transmitted by the switching circuit 11033 when the power supply voltage transmitted by the switching circuit 11033 is determined to reach the voltage threshold value. The overvoltage protector can be determined according to specific service requirements, for example, an overvoltage protector with a gapless structure can be selected. The voltage threshold may include a first voltage threshold and a second voltage threshold. And when the power supply voltage transmitted by the switching circuit reaches a first voltage threshold value in real time, stopping receiving the power supply voltage transmitted by the switching circuit so as to protect an external use terminal from being damaged. And when the power supply voltage transmitted by the switching circuit reaches a second voltage threshold value in real time, the overvoltage protector starts to stabilize the voltage, so that an external use terminal stably works. And when the power supply voltage transmitted by the switching circuit is monitored to be lower than a second voltage threshold value in real time, stopping receiving the power supply voltage transmitted by the switching circuit so as to protect an external use terminal from being damaged.

One end of the overcurrent protector 11035 is connected to the switching circuit 11033, and the other end is connected to the automatic charging terminal 1104, and is configured to set a current threshold, monitor the supply current transmitted by the switching circuit 11033 in real time, and stop receiving the supply current transmitted by the switching circuit 11033 when it is determined that the supply current transmitted by the switching circuit 11033 reaches the current threshold. The overcurrent protector can be determined according to specific service requirements, for example, a current limiting type overcurrent protector can be selected. The current threshold value can be determined according to specific service requirements, the overcurrent protector is used for monitoring the power supply current transmitted by the switching circuit in real time, and when the fact that the power supply current transmitted by the switching circuit reaches the current threshold value is determined, the power supply current transmitted by the switching circuit stops being received. So as to avoid damage to the peripheral user terminal after the current exceeds the current threshold.

The over-current protector can be placed in the circuit upstream or downstream of the over-voltage protector according to specific service requirements, and in this embodiment the over-current protector 11035 is placed in the circuit upstream of the over-voltage protector 11034.

The independent switch module 11036 is connected to the controller 11032, and is configured to control the controller 11032 to independently control switching of outputting the first switching instruction and the second switching instruction. When the solar power supply device 1101 is in a power supply state, when the current power amount detected by the detecting unit 11031 is not lower than the first threshold, a first switching instruction needs to be sent to the switching circuit 11033. When the solar power supply device 1101 is not in a power supply state, when the current power amount detected by the detecting unit 11031 does not reach the second threshold value, a second switching instruction needs to be sent to the switching circuit 11033. In this case, the independent switch module 11036 is required to independently control the transmission of the first switching command or the transmission of the second switching command to the switching circuit 11033.

The controller 11032 includes: a first control contact 110325 and a second control contact 110326;

the first control contact 110325 is connected to the detection unit 11031, and controls the controller 11032 to output the first switching instruction or the second switching instruction according to the current electric quantity transmitted by the detection unit 11031;

the second control contact 110326 is connected to the independent switch module 11036, and controls the controller 11032 to output the first switching command or the second switching command according to an on command or an off command of the independent switch module 11036.

In addition, the specific type of the automatic charging terminal 1104 may be determined according to specific service requirements, for example, a portable type, a desktop type, a vertical type, and other types of self-service charging terminals may be selected. In the power supply system, the solar power supply equipment, the commercial power supply equipment and the power supply circuit switching device can be placed in the self-service charging terminal and also can be prevented from being arranged outside the self-service charging terminal. If the self-service charging terminal is placed outside the self-service charging terminal, the distance from the self-service charging terminal can be determined according to specific service requirements. The power supply system can be arranged in places such as banks, hospitals, airports, communities, markets and the like according to specific business requirements, and the cruising ability of portable equipment such as mobile phones and tablet computers is improved.

Since the information interaction, execution process, and other contents between the elements in the above-mentioned apparatus and system are based on the same concept as the method embodiment of the present invention, specific contents can be referred to the description in the method embodiment of the present invention, and are not described herein again.

As shown in fig. 12, an embodiment of the present invention provides a power supply circuit switching method, including the following steps:

step 1201: presetting a first threshold and a second threshold;

step 1202: detecting a current electric quantity value of a first power supply device of the peripheral equipment;

step 1203: judging whether a first power supply device of the peripheral is in a power supply state, if so, executing a step 1204; otherwise, go to step 1202;

the controller can be used for monitoring whether the first power supply equipment of the peripheral equipment has electric quantity output or not, and if the electric quantity output is monitored, the first power supply equipment of the peripheral equipment is determined to be in a power supply state. If no power output is monitored, it is determined that the first power supply device of the peripheral device is not in a power supply state.

Step 1204: judging whether the current electric quantity value is lower than the first threshold value, if so, executing a step 1205; otherwise, go to step 1202;

the first threshold may be determined to be a specific value according to specific service requirements. Calculating a current actual electric quantity value corresponding to the current electric quantity value by using a formula (1) according to the current electric quantity value;

A loss factor for characterizing the electrical quantity; a is described₁For characterizing the first electrical quantity correction factor; loss factor

And a first electric quantity correction coefficient A₁The specific value may be determined according to specific service requirements. Calculating by using a formula (1) to obtain a current actual electric quantity value, comparing the obtained current actual electric quantity value with a first threshold value, and executing the step 1205 when the current actual electric quantity value is lower than the first threshold value; otherwise, step 1202 is performed.

Step 1205: cutting off the power supply of a first power supply device of the peripheral and switching on the power supply of a second power supply device of the peripheral;

the process of cutting off the power supply of the first peripheral power supply device and conducting the power supply of the second peripheral power supply device can be completed through the MOS tube, and the MOS tube conducts the source electrode and the drain electrode; the power supply of the first power supply equipment of the peripheral equipment is cut off, and the power supply of the second power supply equipment of the peripheral equipment is conducted. If the MOS tube is not adopted, a relay can be used; the relay performs disconnection of the first relay contact and the third relay contact, the second relay contact and the third relay contact are closed, and the third relay contact supplies power to a peripheral user terminal by utilizing peripheral second power supply equipment.

Step 1206: judging whether the current electric quantity reaches the second threshold value, if so, executing step 1207; otherwise, go to step 1203;

the second threshold may be determined to be a specific value according to specific service requirements. Calculating a current actual electric quantity value corresponding to the current electric quantity value by using a formula (2) according to the current electric quantity value;

And a first electric quantity correction coefficient A₁The specific value may be determined according to specific service requirements. Calculating by using the formula (2) to obtain a current actual electric quantity value, comparing the obtained current actual electric quantity value with a second threshold value, and executing step 1207 when the current actual electric quantity value is determined to reach the second threshold value; otherwise, step 1203 is performed.

Step 1207: and cutting off the power supply of the second power supply equipment of the peripheral equipment, and conducting the power supply of the first power supply equipment of the peripheral equipment.

The process of cutting off the power supply of the peripheral second power supply device and turning on the power supply of the peripheral first power supply device can be realized through the MOS tube. The MOS tube does not conduct the source electrode and the drain electrode. And cutting off the power supply of the second power supply equipment of the peripheral equipment and conducting the power supply of the first power supply equipment of the peripheral equipment. If the MOS tube is not adopted, a relay can be used; and a first relay contact and a third relay contact in the relay are closed, a second relay contact and the third relay contact are disconnected, and the third relay contact supplies power to a peripheral user terminal by utilizing peripheral first power supply equipment.

According to the embodiment, the current electric quantity value of the first power supply equipment of the peripheral equipment is detected; judging whether a first power supply device of the peripheral is in a power supply state, if so, cutting off the power supply of the first power supply device of the peripheral and switching on the power supply of a second power supply device of the peripheral when the detected current electric quantity is lower than the first threshold; and judging whether the first power supply equipment of the peripheral equipment is in a power supply state, if not, cutting off the power supply of the second power supply equipment of the peripheral equipment and switching on the power supply of the first power supply equipment of the peripheral equipment when the current electric quantity reaches the second threshold value. It can be seen that in the present scheme, the first power supply device of the peripheral device obtains the current electric quantity of the first power supply device of the peripheral device respectively under the condition of the power supply state or the non-power supply state, and sends different switching instructions according to the relation between the current electric quantity and the preset threshold value and according to the relation between the current electric quantity and the preset threshold value, and realizes the switching between the first power supply device of the peripheral device and the second power supply device of the peripheral device according to the different switching instructions, so that the present scheme can realize the automatic switching between the power supply circuits.

In summary, the embodiments of the present invention can at least achieve the following beneficial effects:

1. in an embodiment of the present invention, the power supply circuit switching apparatus includes a detection unit, a controller, and a switching circuit. The detection unit is used for detecting the current electric quantity value of first power supply equipment of the peripheral equipment and sending the detected current electric quantity value to the controller, the controller is used for judging whether the first power supply equipment of the peripheral equipment is in a power supply state, if so, when the current electric quantity detected by the detection unit is lower than a preset first threshold value, a first switching instruction is sent to the switching circuit, and the switching circuit cuts off the power supply of the first power supply equipment of the peripheral equipment according to the first switching instruction and switches on the power supply of second power supply equipment of the peripheral equipment. And the controller sends a second switching instruction to the switching circuit when judging whether the first power supply equipment of the peripheral equipment is in a power supply state or not, and if not, when the current electric quantity detected by the detection unit reaches the second threshold value, the switching circuit cuts off the power supply of the second power supply equipment of the peripheral equipment according to the second switching instruction and switches on the power supply of the first power supply equipment of the peripheral equipment. Therefore, in the scheme, the current electric quantity of the first power supply equipment of the peripheral equipment is obtained under the condition that the first power supply equipment of the peripheral equipment is in the power supply state or the non-power supply state respectively. And according to the relationship between the current electric quantity and the preset threshold value, sending different switching instructions to the switching circuit according to the relationship between the current electric quantity and the preset threshold value, so that the switching circuit realizes the switching between the peripheral first power supply equipment and the peripheral second power supply equipment according to the different switching instructions, and therefore, the scheme can realize the automatic switching between the power supply circuits.

2. In the embodiment of the present invention, the switching circuit includes an MOS transistor, and the MOS transistor receives, through a gate, level signals corresponding to different switching instructions sent by the controller, and performs corresponding actions according to the received level signals corresponding to the different switching instructions. And when a 0V level signal in the first switching instruction is received, the source electrode and the drain electrode in the MOS tube are conducted, so that the power supply of the first peripheral power supply equipment is cut off, and the power supply of the second peripheral power supply equipment is conducted. When a '49V' level signal in the second switching instruction is received, the source electrode and the drain electrode in the MOS tube are not conducted, so that the power supply of the peripheral second power supply device is cut off, and the power supply of the peripheral first power supply device is conducted. Thus, an automatic switching of the different supply circuits is achieved.

3. In the embodiment of the invention, the switching circuit comprises the relay, and the relay conducts or cuts off different relay contacts according to different switching instructions sent by the controller. When the first switching instruction is received, the first relay contact is disconnected with the third relay contact, the second relay contact is closed with the third relay contact, and the second power supply equipment of the peripheral equipment is used for supplying power to the use terminal of the peripheral equipment. And when a second switching instruction is received, the first relay contact and the third relay contact are closed, the second relay contact and the third relay contact are disconnected, and the first power supply equipment of the peripheral equipment is used for supplying power to the use terminal of the peripheral equipment. Thus, an automatic switching of the different supply circuits is achieved.

4. In the embodiment of the present invention, the power supply circuit switching device may further include an overvoltage protector, which monitors the power supply voltage transmitted by the switching circuit in real time, and stops receiving the power supply voltage transmitted by the switching circuit when it is determined that the power supply voltage transmitted by the switching circuit reaches a preset voltage threshold, so that the peripheral user terminal is protected and the peripheral user terminal is prevented from being damaged when the power supply voltage provided by the first power supply device or the second power supply device of the peripheral device of the switching circuit is abnormal.

5. In the embodiment of the present invention, the power supply circuit switching device may further include an overcurrent protector, which monitors the power supply current transmitted by the switching circuit in real time, and stops receiving the power supply current transmitted by the switching circuit when it is determined that the power supply current transmitted by the switching circuit reaches a preset current threshold. Therefore, under the condition that the switching circuit receives the power supply current provided by the first power supply equipment of the peripheral or the second power supply equipment of the peripheral, the use terminal of the peripheral is protected, and the use terminal of the peripheral is prevented from being damaged.

6. In the embodiment of the present invention, the controller may include a first calculating subunit and a first instruction sending subunit, where the first calculating subunit calculates, according to the current electric quantity value, a current actual electric quantity value corresponding to the current electric quantity value by using a calculation formula; and the first instruction sending subunit sends a first switching instruction to the switching circuit when the current actual electric quantity value is lower than a first threshold value. Since the relation between the current actual electric quantity value and the first threshold value is used, the sending of the first switching instruction is not delayed.

7. In the embodiment of the present invention, the controller may include a second calculating subunit and a second instruction sending subunit, where the second calculating subunit calculates, according to the current electric quantity value, a current actual electric quantity value corresponding to the current electric quantity value by using a calculation formula; and the second instruction sending subunit sends a second switching instruction to the switching circuit when the current actual electric quantity value reaches a second threshold value. Since the relation between the current actual electric quantity value and the second threshold value is used, the sending of the second switching instruction is not delayed.

8. In the embodiment of the invention, the controller is independently controlled to output the first switching instruction and the second switching instruction for switching through the independent switch module, so that the output of the first switching instruction or the second switching instruction is controlled and controlled according to specific service requirements, and the operation is flexible.

9. In the embodiment of the invention, the controller comprises two control contacts, wherein the first control contact is connected with the detection unit, the second control contact is connected with the independent switch module to respectively control the controller to output the first switching instruction or the second switching instruction, and the two control contacts are two independent contacts and are respectively connected with corresponding elements, so that the controller can be ensured not to influence each other when receiving corresponding work of the detection unit or the independent switch module.

10. In the embodiment of the invention, the power supply system comprises a first power supply device, a second power supply device, a use terminal and a power supply circuit switching device, and the power supply circuit switching device is used for realizing the switching of power supply for the use terminal between the first power supply device and the second power supply device.

11. In the embodiment of the invention, the current electric quantity value of the first power supply equipment of the peripheral equipment is detected; judging whether a first power supply device of the peripheral is in a power supply state, if so, cutting off the power supply of the first power supply device of the peripheral and switching on the power supply of a second power supply device of the peripheral when the detected current electric quantity is lower than the first threshold; and judging whether the first power supply equipment of the peripheral equipment is in a power supply state, if not, cutting off the power supply of the second power supply equipment of the peripheral equipment and switching on the power supply of the first power supply equipment of the peripheral equipment when the current electric quantity reaches the second threshold value. It can be seen that in the present scheme, the first power supply device of the peripheral device obtains the current electric quantity of the first power supply device of the peripheral device respectively under the condition of the power supply state or the non-power supply state, and sends different switching instructions according to the relation between the current electric quantity and the preset threshold value and according to the relation between the current electric quantity and the preset threshold value, and realizes the switching between the first power supply device of the peripheral device and the second power supply device of the peripheral device according to the different switching instructions, so that the present scheme can realize the automatic switching between the power supply circuits.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.

Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solutions of the present invention, and not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A power supply circuit switching device, which is respectively connected with a first power supply device of an external device and a second power supply device of the external device, comprises: the device comprises a detection unit, a controller and a switching circuit;

the switching circuit is used for cutting off the power supply of first power supply equipment of the peripheral equipment and conducting the power supply of second power supply equipment of the peripheral equipment when receiving a first switching instruction sent by the controller; when a second switching instruction sent by the controller is received, cutting off the power supply of second power supply equipment of the peripheral equipment, and conducting the power supply of first power supply equipment of the peripheral equipment;

the switching circuit includes: an MOS tube;

the first switching instruction comprises: a "0V" level signal;

the second switching instruction comprises: a "49V" level signal;

2. The power supply circuit switching device according to claim 1, wherein the switching circuit further comprises: a relay;

3. The power supply circuit switching apparatus according to claim 1 or 2, further comprising: an overvoltage protector;

one end of the overvoltage protector is connected with the switching circuit, the other end of the overvoltage protector is connected with an external use terminal, and the overvoltage protector is used for setting a voltage threshold value, monitoring the power supply voltage transmitted by the switching circuit in real time, and stopping receiving the power supply voltage transmitted by the switching circuit when the fact that the power supply voltage transmitted by the switching circuit reaches the voltage threshold value is determined;

further comprising: an overcurrent protector;

4. The power supply circuit switching device according to claim 1, wherein the controller includes: the system comprises a first calculation subunit and a first instruction sending subunit;

the first calculating subunit is configured to receive the current electric quantity value sent by the detecting unit, and calculate, according to a first formula, a current actual electric quantity value corresponding to the current electric quantity value;

the first formula includes:

the first instruction sending subunit is configured to send a first switching instruction to the switching circuit when the current actual electric quantity value is lower than the first threshold;

the second calculating subunit is configured to receive the current electric quantity value sent by the detecting unit, and calculate, according to a second formula, a current actual electric quantity value corresponding to the current electric quantity value;

the second formula includes:

5. The power supply circuit switching device according to claim 1, further comprising: an independent switch module;

the independent switch module is connected with the controller and used for controlling the controller to independently control the switching of the first switching instruction and the second switching instruction;

the controller includes: a first control contact and a second control contact;

6. A power supply system, comprising: a first power supply device, a second power supply device, a use terminal, and the power supply circuit switching apparatus of any one of claims 1 to 5;

7. The power supply system according to claim 6,

the second power supply equipment comprises any one of municipal power supply equipment and generator power supply equipment;

the use terminal is an automatic charging terminal.