CN219678182U - Power supply equipment and power utilization system - Google Patents

Power supply equipment and power utilization system Download PDF

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Publication number
CN219678182U
CN219678182U CN202223609280.5U CN202223609280U CN219678182U CN 219678182 U CN219678182 U CN 219678182U CN 202223609280 U CN202223609280 U CN 202223609280U CN 219678182 U CN219678182 U CN 219678182U
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power supply
interface
circuit
voltage
voltage dividing
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CN202223609280.5U
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Inventor
刘元财
张泫舜
方贵奋
朱荣健
陈浩宇
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Ecoflow Technology Ltd
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Ecoflow Technology Ltd
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Abstract

The application relates to power supply equipment and a power utilization system, wherein the provided power supply equipment comprises a first power supply, a second power supply, a first voltage division circuit, a second voltage division circuit, a switch circuit, a control circuit and a first interface, and the first power supply is connected with a power supply end of the first interface through the switch circuit; the second power supply is connected with the power supply end of the first interface through the first voltage dividing circuit, and the second voltage dividing circuit is connected between the power supply end and the grounding end of the first interface; the first interface is correspondingly connected with a power supply end and a grounding end of a second interface of the electric equipment, and a third voltage dividing circuit is connected between the power supply end and the grounding end of the second interface in series; the control circuit is connected with the control end of the switch circuit and the first end of the second voltage dividing circuit, and is used for conducting the switch circuit to realize power supply when the voltage of the first end of the second voltage dividing circuit is changed from the first voltage value to the second voltage value. The power supply equipment can realize the insertion detection of the electric equipment, and avoid the sparking phenomenon of the equipment in the hot plug process.

Description

Power supply equipment and power utilization system
Technical Field
The application relates to the technical field of hot plug devices, in particular to power supply equipment and an electric system.
Background
With the increase of the types of electric equipment, a plurality of hot plug equipment is widely applied. In related schemes, when two independent devices are connected in communication and power supply, an external connector is required to be used for realizing electric connection, and when a wire joint such as an aviation head which is relatively tight between PINs is adopted, a sparking phenomenon is easy to generate.
Disclosure of Invention
The application discloses power supply equipment and a power utilization system, which solve the problem that spark phenomenon is easy to occur when two independent equipment are in communication and power supply connection.
In a first aspect, the present application provides a power supply apparatus, including a first power supply, a second power supply, a first voltage dividing circuit, a second voltage dividing circuit, a switching circuit, a control circuit, and a first interface, wherein:
the first power supply is connected with the power supply end of the first interface through the switch circuit and is used for providing a first power supply voltage; the switch circuit is used for switching on or switching off the connection between the first power supply and the power supply end of the first interface;
the second power supply is connected with the power supply end of the first interface through the first voltage dividing circuit, and is used for providing a second power supply voltage which is smaller than the first power supply voltage;
The second voltage dividing circuit is connected between the power supply end and the grounding end of the first interface;
the power supply end and the grounding end of the first interface are correspondingly connected with the power supply end and the grounding end of a second interface of the electric equipment, and a third voltage dividing circuit is connected in series between the power supply end and the grounding end of the second interface;
the control circuit is respectively connected with the control end of the switch circuit and the first end of the second voltage dividing circuit, and is used for controlling the switch circuit to conduct connection between the first power supply and the power supply end of the first interface when detecting that the divided voltage of the first end of the second voltage dividing circuit changes from a first voltage value to a second voltage value.
In a second aspect, the present application provides an electrical system, including an electrical device and a power supply device provided in the first aspect, where the electrical device includes a second interface and a third voltage dividing circuit, where:
the second interface at least comprises a power supply end and a grounding end, and is used for being correspondingly connected with the power supply end and the grounding end of the first interface of the power supply equipment; the third voltage dividing circuit is connected between the power supply end and the grounding end of the second interface and is used for being connected with the second voltage dividing circuit in parallel to change the voltage division voltage of the first end of the second voltage dividing circuit when the electric equipment is connected with the power supply equipment through the second interface.
The application provides power supply equipment and an electric system, wherein the power supply equipment is connected with electric equipment through a first interface and a second interface which are correspondingly arranged, a switch circuit is arranged for switching on or off the connection between a first power supply and a power supply end of the first interface, a second power supply, a first voltage dividing circuit and a second voltage dividing circuit are matched with a third voltage dividing circuit of the electric equipment to realize the connection condition detection of the electric equipment and the power supply equipment, and when a control circuit detects that the voltage dividing voltage of the first end of the second voltage dividing circuit is changed from a first voltage value to a second voltage value, the electric equipment is completely inserted, and at the moment, the switch circuit is controlled to be switched on to supply power to the electric equipment through the first power supply. By adopting the technical scheme provided by the application, before the electric equipment is connected, the power supply side provides a power supply source with smaller voltage and a voltage dividing circuit to realize the insertion detection of the electric equipment, so that the spark phenomenon generated in the hot plug process of the electric equipment can be avoided, and after the insertion detection is detected, the first power supply source with larger voltage is controlled to supply power to the power supply equipment through the switch circuit, so that the normal power supply of the electric equipment after the electric equipment is inserted can be ensured, the potential safety hazard is eliminated to a great extent, the use safety of a user is ensured, and the service life of a product is prolonged.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of connection between a power supply device and an electric device according to an embodiment of the present application;
fig. 2a is a schematic structural diagram of a power supply device according to an embodiment of the present application;
fig. 2b is a schematic structural diagram of an electric device according to an embodiment of the present application;
FIG. 2c is a schematic block diagram of a connection structure between a power supply device and an electric device according to an embodiment of the present application;
fig. 3a is a schematic circuit diagram of a power supply device according to an embodiment of the present application;
fig. 3b is a schematic circuit diagram of a power supply device according to an embodiment of the present application;
fig. 4 is a schematic circuit diagram of a power supply device according to an embodiment of the present application;
Fig. 5 is a schematic circuit diagram of a power supply device according to an embodiment of the present application;
fig. 6 is a schematic circuit diagram of a power supply device according to an embodiment of the present application;
fig. 7 is a schematic circuit diagram of a power supply device according to an embodiment of the present application;
fig. 8 is a schematic diagram of another circuit structure of a power supply device according to an embodiment of the present application;
FIG. 9 is a schematic circuit diagram of an electrical system according to an embodiment of the present application;
FIG. 10 is a schematic circuit diagram of an electrical system according to an embodiment of the present application;
FIG. 11 is a schematic circuit diagram of an electric device according to an embodiment of the present application;
fig. 12 is a schematic circuit diagram of an electric device according to an embodiment of the present application;
fig. 13 is a schematic circuit structure diagram of another electric device according to an embodiment of the present application.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.
It is to be understood that the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish identical items or similar items having substantially the same function and effect. For example, the first voltage dividing circuit and the second voltage dividing circuit are only for distinguishing different voltage dividing circuits, and the sequence is not limited. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.
It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In order to facilitate understanding of the embodiments of the present application, some words related to the embodiments of the present application are briefly described below.
Aircraft nose (Connector): also known as connectors, aviation plugs or sockets, are widely used in various electrical circuits to function as a connection or disconnection circuit. The aviation head is generally composed of a plug and a socket, wherein the plug is also called a free-end aviation plug, the socket is also called a fixed aviation plug, and the connection and disconnection of a circuit are realized through the plugging and the separating of the plug and the socket. Some embodiments of the present application are described in detail below. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a schematic block diagram of a circuit for connecting a power supply device 10 and a powered device 20 according to an embodiment of the present application. In the embodiment of the present application, the power supply apparatus 10 includes a first power supply 11, a second power supply 12, a first voltage dividing circuit 13, a second voltage dividing circuit 14, a switch circuit 15, a control circuit 16, and a first interface 17, and the first interface 17 includes a power supply terminal 1 and a ground terminal 2. The first power supply 11 is connected to the power supply terminal 1 of the first interface 17 through the switch circuit 15, and the first power supply 11 is used for providing a first power supply voltage. The switching circuit 15 is used to switch on or off the connection between the first power supply 11 and the power supply terminal 1 of the first interface 17. The second power supply 12 is connected to the power supply terminal 1 of the first interface 17 via the first voltage dividing circuit 13, and the second power supply 12 is configured to provide a second power supply voltage. In an embodiment of the application, the second supply voltage is smaller than the first supply voltage. The second voltage divider circuit 14 is connected between the power supply terminal 1 and the ground terminal 2 of the first interface 17. When the power supply device 10 is connected with the electric equipment 20 through the first interface 17 and the second interface 21, the power supply end 1 and the grounding end 2 of the first interface 17 are correspondingly connected with the power supply end 1 and the grounding end 2 of the second interface 21 of the electric equipment 20. A third voltage dividing circuit 22 is connected in series between the power supply end 1 and the grounding end 2 of the second interface 21, the power supply equipment 10 is connected with the electric equipment 20 through the first interface 17 and the second interface 21, and the third voltage dividing circuit 22 is connected with the second voltage dividing circuit 22 in parallel. The control circuit 16 is connected to the control terminal of the switch circuit 15 and the first terminal of the second voltage dividing circuit 14, and the control circuit 16 is configured to control the switch circuit 15 to turn on the connection between the first power supply 11 and the power supply terminal 1 of the first interface 17 when detecting that the divided voltage of the first terminal of the second voltage dividing circuit 14 changes from the first voltage value to the second voltage value.
When the power supply device 10 is connected with the electric device 20 through the first interface 17 and the second interface 21, since the third voltage dividing circuit 22 of the electric device 20 can be connected with the second voltage dividing circuit 14 of the power supply device 10 in parallel, the voltage value of the first end of the second voltage dividing circuit 14 can be changed from the first voltage value to the second voltage value, and when the control circuit 16 detects that the divided voltage of the first end of the second voltage dividing circuit 14 is changed to the second voltage value, a conduction signal is sent to the control end of the switch circuit 15 to control the switch circuit 15 to conduct, so that the first power supply 11 is input to the power supply end 1 of the first interface 17, and the power supply of the power supply device 10 to the electric device 20 is realized.
In the embodiment of the present application, the power supply device 10 and the electric equipment 20 can be confirmed according to the actual application scenario, and the specific category is not limited by the embodiment of the present application and the attached drawings.
Hereinafter, a mowing trolley is used as the power supply device 10, and a fallen leaf collecting box is used as the electric device 20.
As shown in fig. 2a, fig. 2a is a schematic structural diagram of a power supply apparatus 10 according to an embodiment of the present application. In fig. 2a, the mowing trolley is used as a power supply device to control the change of the advancing direction during operation and mowing work is performed according to a preset instruction, and all the circuits of the power supply device 10 shown in fig. 1 and a first interface are arranged on a circuit board at the tail of the trolley, and the first interface 17 can be an aviation head socket, as shown in fig. 2 a. Fig. 2b is a schematic structural diagram of an electric device 20 according to an embodiment of the present application. In fig. 2b, the fallen leaves collection device is used as a consumer to collect the grass or grass fallen leaves/refuse cut by the grass trolley during operation. The circuits of the electric device 20 shown in fig. 1 are located on a circuit board on the connection side of the defoliation collecting device and the mowing trolley, and the circuit board may be exemplarily disposed in a protective housing 210 shown in fig. 2b, where the second interface 21 is connected to an aerial head plug, where the aerial head plug is a plug corresponding to the aerial head socket in fig. 2a, and the circuit board in the protective housing 210 is correspondingly connected to the aerial head socket of the mowing trolley through a connecting wire with the aerial head plug via a hole 220, so that the power supply and the communication connection between the mowing trolley and the defoliation collecting box can be realized, and when the mowing trolley and the defoliation collecting box are completely connected through the aerial head, the mowing trolley can supply power to the defoliation collecting box, so that the defoliation collecting box can collect the mowing material removed by the mowing trolley in real time, as shown in fig. 2 c.
It should be noted that the first power supply voltage and the second power supply voltage may be set according to the power supply requirement of the fallen leaf collecting device, which is not limited in the present application, but the second power supply voltage is smaller than the first power supply voltage, so that when the first interface and the second interface are connected at the moment of insertion, the pressure difference between the two ends may be smaller, so as to avoid the occurrence of sparking phenomenon. In some embodiments, the first supply voltage may be 12V and the second supply voltage may be 6V, the first supply voltage may be 15V and the second supply voltage may be 8V, the first supply voltage may be 24V and the second supply voltage may be 12V, the first supply voltage may be related to a voltage level required during operation of power supply apparatus 10 and powered device 20, and the second supply voltage may be related to a selection of devices of first voltage divider circuit 13, second voltage divider circuit 14, and third voltage divider circuit 22.
It should be noted that, in some embodiments, the control circuit 16 detects that the divided voltage at the first end of the second voltage dividing circuit 14 changes from the first voltage value to the second voltage value and maintains the voltage for a preset time, for example, after maintaining for 5s or maintaining for 10s, the switch circuit 15 is controlled to be turned on. The preset time may be selected to be different according to a circuit design, which is not limited by the present application. By determining that the first end of the second voltage dividing circuit 14 is turned off after being changed to the second voltage value and then being kept off for a period of time, erroneous conduction of the switch circuit due to the fact that the first end of the second voltage dividing circuit 14 is changed to the second voltage value due to external interference can be avoided.
In some embodiments, control circuit 16 employs a micro-control unit (Microcontroller Unit; MCU) capable of controlling the conduction of switching circuit 15 after ensuring that power supply 10 is fully connected to powered device 20 according to the change in the voltage at the first end of second voltage divider circuit 14.
It should be noted that, after the switch circuit 15 turns on the connection between the first power supply 11 and the power supply terminal of the first interface 17, the first power supply voltage provided by the first power supply 11 may affect the voltage value of the first terminal of the second voltage dividing circuit. In the power supply apparatus 10 provided in the embodiment of the application, after the control circuit 16 controls the switch circuit 15 to be turned on, the switch circuit 15 is not determined to be turned off by the divided voltage of the first end of the second voltage dividing circuit 14, but it is determined whether to turn off the switch circuit 15 according to other detection amounts. In some embodiments, the first interface 17 and the second interface 21 are further provided with communication terminals correspondingly connected, and after the switch circuit 15 is turned on, when detecting that the communication between the first interface 17 and the second interface 21 is interrupted, the control circuit 16 controls the switch circuit 15 to be turned off.
In some embodiments, as shown in fig. 3a, fig. 3a is a schematic circuit diagram of a power supply device 10 according to an embodiment of the present application. In fig. 3a, the first voltage dividing circuit 13 comprises a first voltage dividing unit 131 and an anti-reflection unit 132, the first voltage dividing unit 131 is connected between the second power supply 12 and the power supply end of the first interface 17, and the anti-reflection unit 132 is connected between the first voltage dividing unit 131 and the power supply end 1 of the first interface 17.
In some embodiments, the anti-reflection unit 132 may also be connected between the second power supply 12 and the first voltage dividing unit 131, as shown in fig. 3 b.
In fig. 3a and 3b, the anti-reflection unit 132 is configured to prohibit the first power supply current provided by the first power supply 11 from being input to the second power supply 12 when the connection between the first power supply 11 and the power supply terminal 1 of the first interface 17 is turned on.
When the control circuit 16 detects that the divided voltage at the first end of the second voltage dividing circuit 14 changes from the first voltage value to the second voltage value, the switch circuit 15 turns on the connection between the first power supply 11 and the power supply end of the first interface 17, and since the first power supply voltage of the first power supply 11 is greater than the second power supply voltage of the second power supply 12, if the anti-reflection unit 132 is not provided, there may be a current output by the first power supply 11 flowing backward to the second power supply 12, and therefore, the anti-reflection unit 132 is connected between the second power supply 12 and the power supply end of the first interface 17, so that the safety of the circuit can be ensured.
Illustratively, in some embodiments, as shown in fig. 4, fig. 4 is a schematic circuit structure of a power supply apparatus 10 according to an embodiment of the present application. In fig. 4, the first voltage dividing unit 131 includes at least a first resistor R 1 The anti-reflection unit 132 at least comprises a first diode D 1 First resistor R 1 A first end of (1) is connected with a second power supply 12, a first resistor R 1 Is connected with the first diode D 1 Anode of first diode D 1 Is connected to the supply terminal 1 of the first interface 17. When the connection between the first power supply 11 and the power supply terminal 1 of the first interface 17 is turned on, the first diode D 1 It is possible to prevent the current output from the first power supply source from flowing backward from the first power supply source 11 to the second power supply source 12 to damage the circuit.
In some embodiments, a first diode D 1 The position of the first resistor R1 can also be interchanged, and the first diode D 1 Is connected to the second power supply 12, a first diode D 1 Is connected with a first resistor R 1 A first resistor R 1 Is connected to the supply terminal 1 of the first interface 17.
It should be noted that, in some embodiments, the first diode D 1 The Schottky diode has small forward pressure intensity, short reverse recovery time and lower on voltage, has smaller power consumption than a common diode, and can reduce the electric energy loss.
In some embodiments, as shown in fig. 5, fig. 5 is a schematic circuit diagram of a power supply apparatus 10 according to an embodiment of the present application. In fig. 5, the second voltage divider circuit 14 includes a second resistor R 2 A second resistor R 2 A first terminal connected to the power supply terminal 1 of the first interface 17, a second resistor R 2 Forms the first end of the second voltage divider circuit 14 and is connected to the control circuit 16, as shown by the second resistor R at point A 2 Is connected to the ground terminal 2 of the first interface 17, i.e. the second terminal of the second resistor R2 is grounded.
The second resistor R 2 Is connected to the same ground as the ground terminal 2 of the first interface 17, and when the switching circuit 15 is not turned on, the second power supply 12, the first voltage dividing circuit 13, and the second resistor R 2 In this case, the control circuit 16 detects that the voltage at point a is the divided voltage of the second resistor R2, that is, the first voltage value. When the powered device 20 is plugged in, the third voltage dividing circuit 22 and the second resistor R 2 In parallel, an equivalent resistance is obtained after the first voltage dividing circuit 13 is connected in parallel, and at the moment, the voltage at the point A changes, and after the control circuit 16 detects that the voltage value at the point A changes from the first voltage value to the second voltage value, the control circuit 15 controls the switching circuit 15 to conduct the connection between the first power supply 11 and the power supply end 1 of the first interface 17, so that the power supply equipment 10 can supply power to the electric equipment 20.
In some embodiments, as shown in fig. 6, fig. 6 is a schematic circuit structure of a power supply apparatus 10 according to an embodiment of the present application. In fig. 6, the second voltage divider circuit 14 includes a second resistor R connected in series 2 And a third resistor R 3 A second resistor R 2 And a third resistor R 3 A second resistor R connected in series between the power supply terminal 1 and the ground terminal 2 of the first interface 17 2 And a third resistor R 3 Form a first terminal a of the second voltage divider circuit 14. By applying a second resistor R 2 And a third resistor R 3 As the first end of the second voltage dividing circuit 14, the input value to the control circuit 16 can be reduced, and the control circuit 16 can be protected to a certain extent.
It should be noted that, the magnitudes of the first voltage value and the second voltage value need to be determined according to the resistances of the first voltage dividing circuit 13, the second voltage dividing circuit 14, and the third voltage dividing circuit 22 on the electric device 20 side, and when the circuit structures of the power supply device 10 and the electric device 20 are changed, the first voltage value and the second voltage value should also be changed. In some embodiments, the resistances of the first voltage dividing circuit 13, the second voltage dividing circuit 14, and the third voltage dividing circuit 22 on the powered device 20 side may also be designed according to the first voltage value and the second voltage value, so as to obtain the first voltage value and the second voltage value that meet the requirements.
In some embodiments, as shown in fig. 7, fig. 7 is a schematic circuit diagram of a power supply apparatus 10 according to an embodiment of the present application. In fig. 7, the switching circuit 15 includes a first switching unit 151 and a second switching unit 152. The first end of the first switch unit 151 is connected to the control end of the second switch unit 152, the second end of the first switch unit 151 is grounded, the control end of the first switch unit 151 is connected to the control circuit 16, the first end of the second switch unit 152 is connected to the first power supply 11, and the second end of the second switch unit 152 is connected to the power supply end 1 of the first interface 17. The first switch unit 151 is configured to output a second control signal to the second switch unit 152 when receiving the first control signal of the control circuit 16; the second switch unit 152 is configured to conduct a connection between the first power supply and the power supply terminal 1 of the first interface 17 when receiving the second control signal. Through the arrangement of the first switch unit 151 and the second switch unit 152, after receiving the second control signal of the control circuit 16, the second switch unit 152 is turned on, so that the first power supply 11 can input the first power supply voltage to the power supply end 1 of the first interface 17, power supply of the power supply device 10 to the electric equipment 20 is realized, and meanwhile, the second switch unit 152 for controlling the first power supply 11 can be prevented from being directly connected with the control circuit 16, and damage caused by larger voltage impact to the control circuit is avoided.
In some embodiments, as shown in fig. 8, fig. 8 is a schematic circuit structure of another power supply apparatus 10 according to an embodiment of the present application. In fig. 8, VCC1 is a first power supply 11, VCC2 is a second power supply 12, and the power supply voltage VCC1 of the first power supply 11 is greater than the power supply voltage VCC2 of the second power supply 12. Terminal J 1 For the first interface 17, terminal J 1 1-10 pins of (1-10) are the power supply end VCC_LY and the terminal J 1 Pins 11-20 and 23-24 are the grounding ends, and are all directly grounded. Terminal J 1 The 21-22 pins of (1) are communication terminals LY_RX and LY_TX. When power supply device 10 is fully connected to powered device 20, power supply voltage VCC1 can be supplied via terminal J 1 And the power supply terminal vcc_ly of (c) is output to the electric device 20, so as to supply power to the electric device 20.
The first voltage dividing circuit 13 includes a first resistor R 1 And a first diode D 1 . First diode D 1 The anode of the first diode D is connected with a second power supply VCC2 1 Is connected with a first resistor R 1 A first resistor R 1 Is connected to the supply terminal of the first interface 17. When the connection between the first power supply VCC1 and the power supply end of the first interface 17 is conducted, the first diode D 1 The current output from the first power supply can be prevented from flowing backward from VCC1 to VCC2 to damage the circuit.
The second voltage dividing circuit 14 includes a second resistor R 2 First capacitor C 1 And a third resistor R 3 A second resistor R 2 And a third resistor R 3 A second resistor R connected in series between the power supply terminal 1 and the ground terminal 2 of the first interface 17 2 And a third resistor R 3 Form a first terminal of the second voltage dividing circuit 14 from which the control circuit 16 can sample the voltage signal adc_lock of the divided voltage. First capacitor C 1 And a second resistor R 2 And are connected in parallel. By applying a second resistor R 2 And a third resistor R 3 As the first end of the second voltage divider circuit 14, can reduce the input value to the control circuit 16, and has a certain protection effect on the control circuit 16, and a first capacitor C 1 Can filter out the second resistor R 2 And a third resistor R 3 Is a series point of the interference signal of the series point of (a).
When the powered device 20 is not inserted, the second resistor R 2 And a third resistor R 3 A voltage-dividing voltage U of the first end of the second voltage-dividing unit 14 b1 The following formula is calculated:
wherein V is cc_2 Is the magnitude of the second supply voltage VCC 2.
And when powered device 20 is inserted, second resistor R 2 And a third resistor R 3 In parallel with the third voltage dividing circuit 22, the resistance value of the third voltage dividing circuit is R X At this time, the second resistor R 2 And a third resistor R 3 Resistance value R after parallel connection with third voltage dividing circuit 22 A The following formula is calculated:
when the consumer 20 is fully plugged into the power supply device 10, the second resistor R 2 And a third resistor R 3 The series point of the second voltage dividing unit 14 is the first end voltage U b2 The following formula is calculated:
in the power supply apparatus 10 provided in fig. 8, the second voltage values can be set to U, respectively b1 The first voltage value is U b2 When the second resistor R 2 And a third resistor R 3 The series point of the (a) is that the first end of the second voltage dividing unit 14 divides the voltage from U b1 Change to U b2 After a period of time, the control circuit 16 controls the switch circuit 15 to be turned on so that the first power supply 11 can input the first power supply voltage VCC1 to the terminal J 1 Vcc_ly of the power supply terminal.
The control circuit 16 adopts a micro control unit (Microcontroller Unit; MCU), the MCU collects the voltage signal ADC __ LOCK at the first end of the second voltage division unit 14, when the voltage at the first end of the second voltage division unit 14 changes from the first voltage value to the second voltage value, the MCU outputs an enabling control signal LY_PWR_EN to the switch circuit 15, and controls the conduction of the switch circuit 15 so that the first power supply 11 can input the first power supply voltage VCC1 to the terminal J 1 Vcc_ly of the power supply terminal.
The switch circuit 15 includes a first switch tube Q 1 Resistance R 4 Resistance R 5 Resistance R 6 And resistance R 7 Resistance R 4 Is connected to the control circuit 16 to receive the enable control signal LY_PWR_EN output from the control circuit 16, resistor R 4 Is grounded at the second end of the resistor R 5 Is a first end resistance R of 4 Resistance R 5 The second end of (2) is connected with resistor R 6 Resistance R 6 Is grounded at the second end of the resistor R 6 Is also connected with a first switch tube Q 1 Base of the first switch tube Q 1 Collector connecting resistance R of (2) 7 First end of a first switch tube Q 1 Is grounded, resistance R 5 Can limit the current of the control signal output by the enabling control unit 161 to protect the first switch tube Q 1 After the first end voltage of the second voltage division unit 14 collected by the voltage sampling unit changes from the first voltage value to the second voltage value, the enable control unit 161 outputs the control signal ly_pwr_en to switch the first switching tube Q 1 The base potential of (2) is pulled high, so that the first switch tube Q 1 Conducting.
The second switching unit 152 includes a second switching tube Q 2 Resistance R 8 Capacitance C 2 Capacitance C 3 Capacitor C 4 . Second switch tube Q 2 Gate and resistor R of (2) 7 A second switch tube Q is connected with the second end of 2 1 to 4 of (2)The foot is a drain electrode and is connected with the first power supply 11, the second switch tube Q 2 5-8 pins are used as source electrode and capacitor C 3 Is connected to the first end of the housing. Resistor R 8 Is connected in series with a second switch tube Q 2 Capacitance C between drain and source of (C) 2 And resistance R 8 Parallel connection for filtering out the second switch tube Q 2 Is provided. Capacitor C 3 Is grounded, capacitor C 3 And also with terminal J 1 Is connected to the power supply terminal VCC_LY, capacitor C 4 And capacitor C 3 Parallel connection for filtering out the second switch tube Q 2 Is a source of the disturbance signal. When the first switch tube Q 1 After being conducted, the second switch tube Q 2 The gate potential of the second switch tube Q is pulled low 2 On, VCC1 passes through the second switch tube Q 2 Input to terminal J 1 Vcc_ly of the power supply terminal.
When the power supply apparatus 10 is connected to the electric device 20, the terminal J 1 Is correspondingly connected with the communication end of the second interface 21 of the electric equipment 20, when the power supply equipment 10 is disconnected from the electric equipment 20, the power supply equipment 10 is considered to be disconnected from the electric equipment 20, and the control circuit 16 controls the first switching tube Q 1 Disconnect and then make the second switch tube Q 2 Open, so that the first supply voltage VBAT cannot be input to the terminal J 1 Vcc_ly of the power supply terminal.
Exemplary, in some embodiments, the first switching tube Q 1 And a second switching tube Q 2 Can be a MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, metal-Oxide-semiconductor field effect transistor), a triode, or an IGBT (Insulated Gate Bipolar Transistor ), which is the same as the transistor, for the first switch transistor Q 1 And a second switching tube Q 2 The type of (c) is not limited.
The application provides a power supply device 10, wherein the power supply device 10 is connected with an electric equipment 20 through a first interface 17 and a second interface 21 which are correspondingly arranged, for the power supply device 10, a switch circuit 15 is arranged to switch on or off the connection between a first power supply 11 and a power supply end of the first interface 17, a second power supply 12, a first voltage dividing circuit 13 and a second voltage dividing circuit 14 are arranged to cooperate with a third voltage dividing circuit 22 of the electric equipment 20 so as to realize the connection condition detection of the electric equipment 20 and the power supply device 10, and when a control circuit 16 detects that the voltage of the first end of the second voltage dividing circuit 14 changes from a first voltage value to a second voltage value, the electric equipment is completely inserted, and at the moment, the switch circuit 15 is controlled to be conducted so as to supply power for the electric equipment 20 through the first power supply 11. By adopting the technical scheme provided by the application, before the electric equipment 20 is connected in, the power supply side provides a power supply source with smaller voltage and a voltage dividing circuit to realize the insertion detection of the electric equipment, so that the spark phenomenon generated by the electric equipment 20 in the hot plug process can be avoided, and after the insertion detection is detected, the first power supply source 11 with larger voltage is controlled to supply power to the power supply equipment through the switch circuit 15, so that the normal power supply of the electric equipment 20 after the electric equipment is inserted can be ensured, the potential safety hazard is eliminated to a great extent, the use safety of a user is ensured, and the service life of a product is prolonged.
Referring to fig. 9, fig. 9 is a schematic circuit diagram of an electrical system 100 according to an embodiment of the application. As shown in fig. 9, the power consumption system 100 includes: power supply apparatus 10 and powered apparatus 20. The electric equipment 20 comprises a second interface 21 and a third voltage dividing circuit 22, wherein the second interface 21 at least comprises a power supply end 1 and a grounding end 2, and is used for being correspondingly connected with the power supply end 1 and the grounding end 2 of the first interface 17 of the power supply equipment 10; the third voltage dividing circuit 22 is connected between the power supply terminal 1 and the ground terminal 2 of the second interface 21, and is used for being connected in parallel with the second voltage dividing circuit 22 to change the divided voltage of the first terminal of the second voltage dividing circuit 22 when the electric device 20 is connected with the power supply device 10 through the second interface 21.
Specifically, by the arrangement of the second voltage dividing circuit 22, the first terminal voltage of the second voltage dividing circuit 14 of the power supply apparatus 10 can be changed from the second voltage value to the first voltage value when the power consumption apparatus 20 is connected to the power supply apparatus 10, so that the power supply apparatus 10 can supply power to the power consumption apparatus 20 by turning on the switching unit 15.
In some embodiments, the power supply apparatus 10 may be set with reference to the examples of fig. 1 to 8. For example, the power supply device 10 includes the first power supply 11, the second power supply 12, the first voltage dividing circuit 13, the second voltage dividing circuit 14, the switch circuit 15, the control circuit 16 and the first interface 17 described in the above embodiments, and the specific arrangement manner of the power supply device 10 may refer to the corresponding embodiments described in the present specification, which are not repeated here.
In some embodiments, the power consumption system 100 may be any power consumption system 100 of electrical equipment, and the description of the power consumption system 100 formed by using the mowing trolley as the power supply device 10 and using the fallen leaf collecting device as the electrical equipment 20 in this embodiment may refer to the previous embodiments, and the detailed description of the mowing trolley and the fallen leaf collecting device is not repeated herein.
In some embodiments, as shown in fig. 10, fig. 10 is a schematic circuit diagram of an electrical system 100 according to an embodiment of the present application. In fig. 10, the first interface 17 and the second interface 21 are connected by a connection line, and the powered device 20 further includes a filter circuit 23, where the filter circuit 23 is serially connected between the power supply terminal 1 and the ground terminal 2 of the second interface 21. The interference signal in the supply voltage received by the supply end of the second interface 21 via the connection line can be filtered out by the filter circuit 23.
It should be noted that, in some embodiments, as shown in fig. 11, fig. 11 is a schematic circuit structure of an electric device 20 according to an embodiment of the present application. In fig. 11, the filter circuit 23 includes a common-mode inductance L 1 And a plurality of filter capacitors, common-mode inductance L 1 And each filter capacitor is arranged in parallel. The capacitance values of the filter capacitors can be set to be different so as to filter noise with different frequencies.
In practical application, the electric connection between the mowing trolley and the fallen leaf collecting box is realized through a long section of spring wire and a aviation head, a plurality of high-frequency noises are generated after the signal passes through a long section of spring wire, and interference noises generated in the long wire can be effectively filtered through a parallel multi-capacitance capacitor, so that a complete signal waveform is obtained. Meanwhile, because the spring wires are closely connected, when the common mode interference of synchronous same frequency is generated in the external environment, the common mode interference can greatly influence the signal quality,affecting signal integrity through common mode inductance L 1 The arrangement of the device can effectively eliminate the generated common mode interference.
As shown in fig. 11, in some embodiments, the filter capacitance includes a filter capacitance C 5 ～C 9 The number and the capacitance of the filter capacitors and the withstand voltage parameter are related to the circuit structures of the electric equipment 20 and the power supply equipment 10, and the embodiment of the application does not limit the number and the capacitance of the filter capacitors and the withstand voltage parameter.
For example, in some embodiments, as shown in fig. 12, fig. 12 is a schematic circuit structure of a powered device 20 according to an embodiment of the present application. In fig. 12, the electric device 20 further includes a protection circuit 24, where the protection circuit 24 is connected between the power supply terminal 1 of the second interface 21 and the ground terminal 2 of the second interface 21, and the protection circuit 24 is configured to conduct connection between the protection circuit 24 and the power supply terminal 1 of the second interface 21 and the ground terminal 2 to release the input voltage when the input voltage of the power supply terminal 1 of the second interface 21 is greater than or equal to the conducting voltage of the protection circuit 24.
Through parallelly connected protection circuit 24 between the power supply end 1 of second interface 21 and the ground connection end 2 of second interface 21 of consumer 20, after the high-voltage static electricity that the outside produced enters into consumer 20 through the aviation connector, switch on the connection of protection circuit 24 and power supply end 1 and the ground connection end 2 of second interface 21 in order to release input voltage, prevented effectively that the high pressure from entering into the chip end of consumer 20 to cause the breakdown and the damage to the protection chip.
In some embodiments, as shown in fig. 13, fig. 13 is a schematic circuit structure of another electric device 20 according to an embodiment of the present application. In fig. 13, a powered device 20 includes a second interface 21, a third voltage dividing circuit 22, a filter circuit 23 and a protection circuit 24. The second interface 21 is a terminal J 2 Terminal J 2 1 pin of the power supply device is the power supply end, 2 pin is the ground end, and the power supply device is respectively connected with the wiring terminal J of the power supply device 10 shown in fig. 8 1 The power supply end and the grounding end of the power supply are connected through a connecting wire, and the wiring terminal J 2 The 3 pins and the 4 pins of the power supply device 10 are the communication terminals LY_RXD and LY_TXD, and are respectively connected with the communication terminals of the first interface 17 of the power supply device 10, such as the terminal J in FIG. 8 1 LY of (2)RX is communicatively coupled to LY_TX. When powered device 20 is plugged into a power supply device, ly_rxd is electrically connected to ly_rx, ly_txd is electrically connected to ly_tx, powered device 10 and powered device 20 may communicate through ly_rxd/ly_rx, ly_txd/ly_tx, and when powered device 20 is unplugged, the communication is cut off, at which time powered device 10 immediately disconnects power to powered device 20.
With continued reference to fig. 13, the third voltage dividing unit 22 includes a resistor R 9 Resistance R 9 Is connected in series with the wiring terminal J 2 Between pins 1 and 2 of (1), resistor R when powered device 20 is plugged into power supply device 10 9 Through terminal J 2 Pins 1 and 2 of the power supply device 10 shown in fig. 8 are connected in parallel with the second voltage dividing circuit 14, so as to realize detection of the insertion condition of the electric equipment 20.
The filter circuit 23 includes a common-mode inductance L 1 And a plurality of filter capacitors C 5 ～C 9 Through common-mode inductance L 1 And filter capacitor C 5 ～C 9 The parallel arrangement can filter out interference noise generated in the long wiring of the power supply equipment 10 and the electric equipment 20 and common mode interference of synchronous same frequency generated by the external environment.
The protection circuit 24 includes a transient voltage suppression diode (Transient Voltage Suppressor, TVS) D 2 TVS tube D 2 Terminal J connected in series with powered device 20 2 And terminal J 2 When high-voltage static electricity generated by outside enters the terminal J through the aviation connector 2 After that, the TVS tube is broken down reversely, and the high voltage is conducted to the ground through the TVS tube, so that breakdown damage caused by the high voltage entering the chip end of the electric equipment 20 is effectively prevented.
The application provides an electricity utilization system 100, wherein a power supply device 10 is connected with an electric equipment 20 through a first interface 17 and a second interface 21 which are correspondingly arranged, and for the electric equipment 20, through the arrangement of a third voltage dividing circuit 22, whether the electric equipment 20 is completely inserted into the power supply device 10 or not can be detected when the electric equipment 20 is inserted into the power supply device 10, so that the power supply device 10 supplies power to the electric equipment 20 when the electric equipment 20 is completely inserted. By improving the circuit structure of the electric equipment 20 and combining with the power supply equipment 10 provided by the embodiment, the technical scheme provided by the application can ensure the safe operation of the power utilization system 100, prevent the phenomenon that a user generates fire when connecting two independent equipment, greatly eliminate potential safety hazards, ensure the use safety of the user and prolong the service life of the product.
In the description of the present application, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The above disclosure provides many different embodiments, or examples, for implementing different structures of the application. The foregoing description of specific example components and arrangements has been presented to simplify the present disclosure. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments are only preferred embodiments of the present application, and the scope of the present application is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present application are intended to be within the scope of the present application as claimed.

Claims (10)

1. The utility model provides a power supply unit, its characterized in that, power supply unit includes first power supply, second power supply, first bleeder circuit, second bleeder circuit, switching circuit, control circuit and first interface, wherein:
The first power supply is connected with the power supply end of the first interface through the switch circuit and is used for providing a first power supply voltage; the switch circuit is used for switching on or switching off the connection between the first power supply and the power supply end of the first interface;
the second power supply is connected with the power supply end of the first interface through the first voltage dividing circuit, and is used for providing a second power supply voltage which is smaller than the first power supply voltage;
the second voltage dividing circuit is connected between the power supply end and the grounding end of the first interface;
the power supply end and the grounding end of the first interface are correspondingly connected with the power supply end and the grounding end of a second interface of the electric equipment, and a third voltage dividing circuit is connected in series between the power supply end and the grounding end of the second interface;
the control circuit is respectively connected with the control end of the switch circuit and the first end of the second voltage dividing circuit, and is used for controlling the switch circuit to conduct connection between the first power supply and the power supply end of the first interface when detecting that the divided voltage of the first end of the second voltage dividing circuit changes from a first voltage value to a second voltage value.
2. The power supply apparatus according to claim 1, wherein the first voltage dividing circuit includes a first voltage dividing unit connected between the second power supply and the power supply end of the first interface, and an anti-reflection unit connected between the first voltage dividing unit and the power supply end of the first interface, or between the second power supply and the first voltage dividing unit, for prohibiting a current output from the first power supply from being input to the second power supply when connection between the first power supply and the power supply end of the first interface is turned on.
3. The power supply apparatus according to claim 2, wherein the first voltage dividing unit includes at least a first resistor, the anti-reflection unit includes at least a first diode, the first resistor and the first diode are connected in series and then connected between the second power supply and the power supply end of the first interface, and the first diode prohibits the current output by the first power supply from being input to the second power supply when the connection between the first power supply and the power supply end of the first interface is turned on.
4. The power supply apparatus of claim 1, wherein the second voltage divider circuit comprises a second resistor, a first end of the second resistor being connected to a power supply end of the first interface, the first end of the second resistor forming a first end of the second voltage divider circuit, a second end of the second resistor being connected to a ground end of the first interface.
5. The power supply apparatus according to claim 1, wherein the second voltage dividing circuit includes a second resistor and a third resistor connected in series, the second resistor and the third resistor being connected in series between a power supply terminal and a ground terminal of the first interface, a series point of the second resistor and the third resistor forming a first terminal of the second voltage dividing circuit.
6. The power supply apparatus according to claim 1, wherein the switching circuit includes a first switching unit and a second switching unit, wherein:
the first end of the first switch unit is connected with the control end of the second switch unit, the second end of the first switch unit is grounded, the control end of the first switch unit is connected with the control circuit, the first end of the second switch unit is connected with the first power supply, the second end of the second switch unit is connected with the power supply end of the first interface, and the first switch unit is used for outputting a second control signal to the second switch unit when receiving a first control signal of the control circuit;
And the second switch unit is used for conducting connection between the first power supply and the power supply end of the first interface when receiving the second control signal.
7. An electrical power consumption system comprising a powered device and the power sourcing equipment of any of claims 1-6, the powered device comprising a second interface and a third voltage divider circuit, wherein:
the second interface at least comprises a power supply end and a grounding end, and is used for being correspondingly connected with the power supply end and the grounding end of the first interface of the power supply equipment; the third voltage dividing circuit is connected between the power supply end and the grounding end of the second interface and is used for being connected with the second voltage dividing circuit in parallel to change the voltage division voltage of the first end of the second voltage dividing circuit when the electric equipment is connected with the power supply equipment through the second interface.
8. The power system of claim 7, wherein the first interface and the second interface are connected by a connection line, the powered device further comprising a filter circuit, wherein,
the filter circuit is connected in series between the power supply end and the grounding end of the second interface and is used for filtering interference signals in the power supply voltage received by the power supply end of the second interface through the connecting wire.
9. The electrical power consumption system of claim 7, wherein the powered device further comprises:
the protection circuit is connected between the power supply end of the second interface and the grounding end of the second interface, and is used for conducting connection between the power supply end of the second interface and the grounding end to absorb the input voltage when the input voltage of the power supply end of the second interface is larger than or equal to the conducting voltage of the protection circuit.
10. The electrical system of claim 8, wherein the filter circuit comprises a common-mode inductance and a plurality of filter capacitors, the common-mode inductance and each filter capacitor being arranged in parallel, wherein the plurality of filter capacitors differ in capacitance.
CN202223609280.5U 2022-12-28 2022-12-28 Power supply equipment and power utilization system Active CN219678182U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223609280.5U CN219678182U (en) 2022-12-28 2022-12-28 Power supply equipment and power utilization system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223609280.5U CN219678182U (en) 2022-12-28 2022-12-28 Power supply equipment and power utilization system

Publications (1)

Publication Number Publication Date
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Country Link
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