CN220896363U - Power distribution equipment and power distribution system - Google Patents

Abstract

The application discloses a power distribution device and a power distribution system. The power distribution equipment comprises a black start circuit, a control circuit and a first sampling circuit, wherein the black start circuit comprises a second sampling circuit and a battery, the second sampling circuit is electrically connected with the battery, a mains supply power grid and a portable power supply, the control circuit is electrically connected with the battery, the mains supply power grid, the portable power supply and a load, one end of the first sampling circuit is electrically connected with the control circuit, the other end of the first sampling circuit is electrically connected with the mains supply power grid, and the first sampling circuit and the second sampling circuit are both used for sampling the mains supply power grid. Wherein: under the condition that a mains supply network is powered down, the second sampling circuit outputs a first electric signal, and the battery receives the first electric signal and supplies power to the control circuit; after the control circuit is powered on, the first sampling circuit outputs a second electric signal, and the control circuit wakes up the portable power supply to supply power to the load and the power distribution equipment after receiving the second electric signal. In the application, the portable power supply does not need to be kept in an on standby state, thereby reducing the power consumption and reducing the energy waste.

Description

Power distribution equipment and power distribution system

Technical Field

The application relates to the technical field of power distribution, in particular to power distribution equipment and a power distribution system.

Background

A portable power source is a device that can provide power to a load. Generally, a portable power source is matched with a corresponding power distribution device, and the power distribution device can transmit electric energy of the portable power source to a load to maintain normal operation of the load under the condition that a commercial power grid cannot provide electric power to the load, so that the portable power source can be used as a standby power source in a power distribution system. In general, if the portable power source is required to supply power to the load when the utility grid cannot supply power to the load, the portable power source needs to be kept in an on standby state all the time, however, the on standby state results in larger power consumption of the portable power source, thereby causing energy waste and higher power supply cost.

Disclosure of utility model

The embodiment of the application provides power distribution equipment and a power distribution system.

The power distribution equipment comprises a black start circuit, a control circuit and a first sampling circuit, wherein the black start circuit comprises a second sampling circuit and a battery, the second sampling circuit is electrically connected with the battery, a mains supply power grid and a portable power supply, the control circuit is electrically connected with the battery, the mains supply power grid, the portable power supply and a load, one end of the first sampling circuit is electrically connected with the control circuit, the other end of the first sampling circuit is electrically connected with the mains supply power grid, and the first sampling circuit and the second sampling circuit are both used for sampling the mains supply power grid. Wherein: under the condition that the mains supply network is powered down, the second sampling circuit outputs a first electric signal, and the battery supplies power to the control circuit after receiving the first electric signal; after the control circuit is powered on, the first sampling circuit outputs a second electric signal, and the control circuit wakes up the portable power supply to supply power to the load and the power distribution equipment after receiving the second electric signal.

In some embodiments, the second sampling circuit outputs a third electrical signal when the portable power source supplies power to the load and the power distribution device, and the battery stops supplying power to the control circuit after receiving the third electrical signal.

In some embodiments, the black start circuit further includes a bidirectional charge and discharge circuit, the bidirectional charge and discharge circuit is electrically connected to the control circuit, the second sampling circuit and the battery, and the battery transmits the electric energy to the control circuit through the bidirectional charge and discharge circuit after receiving the first electric signal.

In some embodiments, the black start circuit further includes a battery protection circuit, the battery protection circuit is electrically connected to both the battery and the bidirectional charge and discharge circuit, and the battery protection circuit conducts the electrical connection between the bidirectional charge and discharge circuit and the battery when the voltage of the battery is lower than a preset threshold; and under the condition that the voltage of the battery is higher than a preset threshold value, the battery protection circuit breaks the electrical connection between the bidirectional charge and discharge circuit and the battery.

In some embodiments, the control circuit includes a wake-up chip that sends a wake-up signal to the portable power source for turning on the portable power source to power the load and the power distribution device if the control circuit receives the second electrical signal.

In some embodiments, the power distribution device further comprises a switching power supply, the control circuit is electrically connected with the utility power grid and the portable power supply through the switching power supply, and the switching power supply is used for converting alternating current transmitted by the utility power grid and/or the portable power supply into direct current and transmitting the direct current to the control circuit.

In some embodiments, the power distribution device further includes a dc power supply, and the control circuit is electrically connected to the switching power supply and the black start circuit through the dc power supply, where the dc power supply is configured to step down dc power input by the switching power supply, and transmit the step-down dc power to the control circuit.

In some embodiments, the power distribution device further comprises a power switch circuit, the control circuit is electrically connected with the load through the power switch circuit, the utility grid and the portable power source are both electrically connected with the power switch circuit, and the power switch circuit is used for selectively conducting the utility grid and the load or conducting the portable power source and the load.

The power distribution system of the embodiment of the application comprises a portable power source, a commercial power grid, a load and the power distribution equipment of any embodiment, wherein the portable power source, the commercial power grid and the load are electrically connected with the power distribution equipment.

In some embodiments, the portable power source includes a start-up circuit that turns on the portable power source upon receiving a wake-up signal sent by a wake-up chip of the control circuit.

In the power distribution equipment and the power distribution system, under the condition that a mains supply network is powered down, the second sampling circuit outputs the first electric signal, the battery receives the first electric signal and supplies power to the control circuit, after the control circuit is powered up, the first sampling circuit outputs the second electric signal, and the control circuit wakes the portable power supply to supply power to the load and the power distribution equipment after receiving the second electric signal, so that the portable power supply can realize the standby power function without always keeping the standby state on, thereby reducing the power consumption of the portable power supply, reducing the energy waste and reducing the power supply cost.

Additional aspects and advantages of embodiments of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a power distribution system according to certain embodiments of the present application;

FIG. 2 is a schematic diagram of a black start circuit in the power distribution system of FIG. 1;

FIG. 3 is a schematic diagram of a bidirectional charge and discharge circuit in the black start circuit shown in FIG. 2;

Fig. 4 is a schematic diagram of the interface of a power distribution device and a portable power source in the power distribution system shown in fig. 1.

Description of main reference numerals:

A power distribution system 1000;

A power distribution apparatus 100; a portable power source 200 and a start circuit 201; a utility grid 300; a load 400;

A black start circuit 10, a second sampling circuit 11, a battery 13, a bidirectional charge-discharge circuit 15, and a battery protection circuit 17; a control circuit 20 and a wake-up chip 21; a first sampling circuit 30; a switching power supply 40; a direct current power supply 50; a power switch circuit 60, a conduction switch 61 and a conductive line 63.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the embodiments of the present application and are not to be construed as limiting the embodiments of the present application.

In the description of the present application, it should be understood that the terms "thickness," "upper," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the application. And the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may be fixedly connected, detachably connected, or integrally connected in one example; may be mechanically or electrically connected, or may be in communication with each other; either directly or indirectly through intermediaries, may be in communication with each other between two elements or in an interaction relationship between the two elements.

Referring to fig. 1, a power distribution device 100 according to an embodiment of the present application includes a black start circuit 10, a control circuit 20 and a first sampling circuit 30, where the black start circuit 10 includes a second sampling circuit 11 and a battery 13, the second sampling circuit 11 is electrically connected to the battery 13, a utility power grid 300 and a portable power source 200, the control circuit 20 is electrically connected to the battery 13, the utility power grid 300, the portable power source 200 and a load 400, one end of the first sampling circuit 30 is electrically connected to the control circuit 20, the other end is electrically connected to the utility power grid 300, and the first sampling circuit 30 and the second sampling circuit 11 are both used for sampling the utility power grid 300. Wherein: under the condition that the mains supply grid 300 is powered down, the second sampling circuit 11 outputs a first electric signal, and the battery 13 receives the first electric signal and supplies power to the control circuit 20; after the control circuit 20 is powered up, the first sampling circuit 30 outputs a second electrical signal, and the control circuit 20 wakes up the portable power source 200 to supply power to the load 400 and the power distribution device 100 after receiving the second electrical signal.

Specifically, in some embodiments, in a case where the utility grid 300 is powered down, that is, in a case where the utility grid 300 fails or fails to supply power to the power distribution device 100 and the load 400 for other reasons, the second sampling circuit 11 can collect a change in a power supply state of the current utility grid 300 and output a first electrical signal according to the change, and the battery 13 in the black start circuit 10 can start to supply power to the control circuit 20 according to the first electrical signal, so as to maintain the normal operation of the control circuit 20. However, since the electric energy stored in the battery 13 is small, the battery 13 can only supply power to the control circuit 20, so that the control circuit 20 maintains normal operation for a short time after the utility grid 300 is powered down, and the battery 13 cannot supply power to the load 400, therefore, after the battery 13 supplies power to the control circuit 20, the control circuit 20 can transmit electric energy to the first sampling circuit 30, at this time, the first sampling circuit 30 can also collect a change in the power supply state of the current utility grid 300, and output a second electric signal according to the change, and the control circuit 20 can wake up (turn on) the portable power source 200 according to the second electric signal, so that the portable power source 200 supplies power to the load 400 and the power distribution device 100 (including the control circuit 20, the battery 13, the first sampling circuit 30, and the like), and thus, the portable power source 200 can function as a standby power source, preventing the abrupt power failure of the utility grid 300 from affecting the normal operation of the load 400.

The control circuit 20 is an electronic system capable of realizing functions such as automatic control, data processing, feedback, storage, and communication. Specifically, in some embodiments, in the case where the control circuit 20 is powered on, that is, in the case where the control circuit 20 receives the supply of electric energy from at least one of the utility grid 300, the portable power source 200 and the battery 13, the control circuit 20 can monitor and regulate the electric energy from at least one of the utility grid 300, the portable power source 200 and the battery 13, for example, the control circuit 20 can control the voltage level of the utility grid 300 supplying the load 400, or control the electrical connection state (on or off) between the utility grid 300 and at least part of the load 400, and so on, so the setting of the control circuit 20 can improve the stability of the operation of the power distribution system 1000. It should be noted that, in some embodiments, the control circuit 20 may be a micro control unit (Microcontroller Unit, MCU), and the MCU is electrically connected to the battery 13, the utility power grid 300, the portable power source 200 and the load 400.

The first sampling circuit 30 and the second sampling circuit 11 are each a circuit capable of achieving signal isolation and sampling. For example, the first sampling circuit 30 can sample and process the current signal of the utility grid 300, and output a corresponding electrical signal according to the change of the current signal to represent the power supply state of the utility grid 300; the second sampling circuit 11 is capable of sampling and processing the current signal of the utility grid 300 or the portable power source 200, and outputting a corresponding electrical signal according to the change of the current signal to represent the power supply state of the utility grid 300 or the portable power source 200. Specifically, in some embodiments, in the case that the utility grid 300 is powered down, the second sampling circuit 11 cannot acquire the current signal or acquires a very small value of the current signal, in this case, the second sampling circuit 11 can output the first electrical signal to indicate that the utility grid 300 is powered down, and in the case that the battery 13 receives the first electrical signal, the battery 13 can supply power to the control circuit 20 to maintain the control circuit 20 to work normally; under the condition that the control circuit 20 works normally, the first sampling circuit 30 can sample and process the current signal of the mains supply module, so that the first sampling circuit 30 outputs a second electric signal to indicate that the mains supply grid 300 is powered down, and under the condition that the control circuit 20 receives the second electric signal, the control circuit 20 can wake up the portable power supply 200, so that the portable power supply 200 supplies power to the load 400 and the power distribution equipment 100. In some embodiments, the first sampling circuit 30 and the second sampling circuit 11 may be ac isolated sampling circuits or other circuits capable of sampling ac voltage. Specifically, in one example, the first electrical signal and the second electrical signal may be the same, e.g., the first electrical signal and the second electrical signal are both low level signals. In another example, the first electrical signal and the second electrical signal may be different. The signal types of the first electric signal and the second electric signal may be different according to different circuits or application scenarios.

The battery 13 is a device or means capable of converting energy in the form of chemical energy, physical energy, nuclear energy, or the like into electric energy for release, or converting electric energy into energy in the form of chemical energy, physical energy, nuclear energy, or the like for storage. In the present application, the battery 13 is capable of transmitting electrical energy to the control circuit 20. The battery 13 may be a secondary battery, and in this case, the electric energy stored in the battery 13 may be derived from the utility power grid 300, the portable power source 200, or another power generation module. The battery 13 may also be a primary battery. In some embodiments, the battery 13 includes, but is not limited to, a lead-acid battery 13, a nickel-hydrogen battery 13, a lithium ion battery 13, and the like. Portable power source 200 is a device or means capable of storing electrical energy and having an ac output. The electric energy stored in the portable power source 200 may be derived from the utility power grid 300, or may be derived from a wind power generation device, a photovoltaic power generation device, a diesel generator, or other power generation devices.

The load 400 is a device or element capable of consuming electrical energy in the power distribution system 1000. Where at least one of the utility grid 300 and the portable power source 200 is capable of powering the load 400, the load 400 is capable of converting electrical energy into other forms of energy, such as thermal, light or mechanical energy, and the like. The load 400 may be various electronic devices such as a lamp, a motor, an electric heater, or a refrigerator, etc., without limitation. It will be appreciated that in the case where the mains electricity grid 300 or the portable power source 200 supplies power to the battery 13 in the black start circuit 10, the battery 13 also exists as a load 400.

In the power distribution equipment 100, under the condition that the utility power grid 300 is powered down, the second sampling circuit 11 outputs the first electric signal, the battery 13 receives the first electric signal and supplies power to the control circuit 20, after the control circuit 20 is powered up, the first sampling circuit 30 is powered up and outputs the second electric signal, and the control circuit 20 wakes the portable power supply 200 to supply power to the load 400 and the power distribution equipment 100 after receiving the second electric signal, so that the portable power supply 200 can realize the standby power function without always keeping the standby state on, thereby reducing the power consumption of the portable power supply 200, reducing the energy waste and reducing the power supply cost.

The power distribution apparatus 100 is further explained below with reference to the drawings.

Referring to fig. 1, in some embodiments, in the case where the portable power source 200 supplies power to the load 400 and the power distribution apparatus 100, the second sampling circuit 11 outputs a third electrical signal, and the battery 13 stops supplying power to the control circuit 20 after receiving the third electrical signal.

Specifically, in some embodiments, in the case where the portable power source 200 supplies power to the load 400 and the power distribution apparatus 100, the current signal of the portable power source 200 changes, the second sampling circuit 11 can output a third electric signal according to the change to indicate that the portable power source 200 starts to output electric power, and in the case where the battery 13 receives the third electric signal, the battery 13 stops supplying power to the control circuit 20, whereby on the one hand, the electric power consumption of the battery 13 can be reduced; on the other hand, it is possible to prevent the battery 13 and the portable power source 200 from simultaneously supplying power to the control circuit 20, which would cause damage to the control circuit 20, thereby improving the safety of the power distribution apparatus 100 and the power distribution system 1000. It will be appreciated that in some embodiments, the portable power source 200 may supply power to the battery 13 (where the battery 13 is a secondary battery) after the battery 13 ceases to supply power to the control circuit 20 to ensure that the power in the battery 13 is sufficient. Of course, in other embodiments, after the battery 13 stops supplying power to the control circuit 20, the portable power source 200 may not supply power to the battery 13, i.e. the power of the portable power source 200 is preferentially supplied to the control circuit 20 and the load 400, so that the utilization rate of the power in the portable power source 200 can be optimized, and the normal operation of the power distribution system 1000 can be ensured. The battery 13 may be powered by the utility power grid 300 after the utility power grid 300 is re-electrified, that is, the utility power grid 300 supplies power to the control circuit 20, the battery 13, the load 400, and the like after the utility power grid 300 is re-electrified.

Referring to fig. 1 and 2, in some embodiments, the black start circuit 10 may further include a bidirectional charge/discharge circuit 15, where the bidirectional charge/discharge circuit 15 is electrically connected to the control circuit 20, the second sampling circuit 11 and the battery 13, and the battery 13 transmits the electric energy to the control circuit 20 through the bidirectional charge/discharge circuit 15 after receiving the first electric signal by the bidirectional charge/discharge circuit 15.

Specifically, referring to fig. 3, in some embodiments, the battery 13 may be electrically connected to the control circuit 20 and the second sampling circuit 11 through the bidirectional charge-discharge circuit 15. The bidirectional charge/discharge circuit 15 is a circuit capable of realizing bidirectional flow of electric energy, that is, capable of storing electric energy in the battery 13 and releasing electric energy in the battery 13. In the present application, in the case where the second sampling circuit 11 outputs the first electrical signal and the bidirectional charge and discharge circuit 15 receives the first electrical signal, the bidirectional charge and discharge circuit 15 can switch to the discharge mode, in which case the bidirectional charge and discharge circuit 15 can transmit the electrical energy of the battery 13 to the control circuit 20 to maintain the normal operation of the control circuit 20. In addition, in the case where the second sampling circuit 11 outputs the third electric signal and the bidirectional charge and discharge circuit 15 receives the third electric signal, the bidirectional charge and discharge circuit 15 can stop the output of electric energy in the battery 13. Under the condition that the voltage of the battery 13 is too low or the discharge capacity reaches a preset value, the bidirectional charge and discharge circuit 15 can stop the output of the electric energy in the battery 13, so that the arrangement of the bidirectional charge and discharge circuit 15 can prevent the battery 13 from overdischarge, prolong the service life of the battery 13 and improve the safety of the power distribution equipment 100 and the power distribution system 1000.

In the case where the utility grid 300, the portable power source 200, or other powerable device charges the battery 13, the bi-directional charge-discharge circuit 15 may be switched from the discharge mode to the charge mode, in which case the bi-directional charge-discharge circuit 15 is capable of transferring external electrical energy into the battery 13 for storage. When the battery 13 reaches a preset charging voltage or charging capacity, the bidirectional charging and discharging circuit 15 can stop charging the battery 13, so that the bidirectional charging and discharging circuit 15 can prevent the battery 13 from overcharging, prolong the service life of the battery 13, and improve the safety of the power distribution equipment 100 and the power distribution system 1000.

Further, referring to fig. 1 and 2, in some embodiments, the black start circuit 10 may further include a battery protection circuit 17, where the battery protection circuit 17 is electrically connected to the battery 13 and the bidirectional charge/discharge circuit 15, and the battery protection circuit 17 conducts the electrical connection between the bidirectional charge/discharge circuit 15 and the battery 13 when the voltage of the battery 13 is lower than a preset threshold; in the case where the voltage of the battery 13 is higher than the preset threshold, the battery protection circuit 17 breaks the electrical connection between the bidirectional charge and discharge circuit 15 and the battery 13.

The battery protection circuit 17 is a circuit capable of detecting the state of the battery 13 and taking corresponding protection measures to protect the battery 13 when an abnormal situation occurs in the battery 13. The protection function of the battery protection circuit 17 includes, but is not limited to, overvoltage protection, undervoltage protection, overcurrent protection, short-circuit protection, temperature protection, and the like. For example, the battery protection circuit 17 can detect a parameter such as the voltage, current, or temperature of the battery 13, and determine the state of the battery 13 based on the parameter. In some embodiments, in the case where the battery protection circuit 17 detects that the voltage of the battery 13 is lower than the preset threshold, that is, in the case where the voltage of the battery 13 is up to the preset charging voltage, the battery protection circuit 17 may maintain the electrical connection between the bidirectional charging and discharging circuit 15 and the battery 13, so that the electric energy of the utility grid 300, the portable power source 200 or other electrically-chargeable device can be transmitted into the battery 13 through the bidirectional charging and discharging circuit 15; in the case that the battery protection circuit 17 detects that the voltage of the battery 13 is higher than the preset threshold, that is, in the case that the voltage of the battery 13 reaches the preset charging voltage, if the battery 13 is continuously charged, the battery 13 is damaged, so in this case, the battery protection circuit 17 can disconnect the electrical connection between the bidirectional charging and discharging circuit 15 and the battery 13, so that the electric energy of the utility power grid 300, the portable power source 200 or other power-capable equipment cannot be transmitted to the battery 13 through the bidirectional charging and discharging circuit 15, thereby preventing the battery 13 from being overcharged and prolonging the service life of the battery 13.

It should be noted that, in some embodiments, the preset threshold may be a critical threshold for determining whether the battery 13 reaches the charging voltage. The preset threshold value may be known data, and may be an empirical value obtained before the battery protection circuit 17 leaves the factory, or a set value input by the battery protection circuit 17 when it is manually used after leaving the factory.

In other embodiments, in the case where the battery protection circuit 17 detects that the voltage of the battery 13 is higher than the predetermined threshold, that is, in the case where the voltage of the battery 13 is not up to the preset discharge voltage, the battery protection circuit 17 may maintain the electrical connection between the bidirectional charge and discharge circuit 15 and the battery 13, so that the bidirectional charge and discharge circuit 15 can transmit the electrical energy in the battery 13 to the control circuit 20; in the case where the battery protection circuit 17 detects that the voltage of the battery 13 is lower than the predetermined threshold, that is, in the case where the voltage of the battery 13 reaches the preset discharge voltage, if the battery 13 continues to discharge, the battery 13 may be damaged, and therefore, in this case, the battery protection circuit 17 can disconnect the electrical connection between the bidirectional charge and discharge circuit 15 and the battery 13, so that the electrical energy in the battery 13 cannot be transmitted to the control circuit 20 through the bidirectional charge and discharge circuit 15, thereby preventing the overdischarge problem of the battery 13 and prolonging the service life of the battery 13. It should be noted that, in some embodiments, the predetermined threshold may be a critical threshold for determining whether the battery 13 reaches the discharge voltage. The predetermined threshold value may be known data, and may be an empirical value obtained before the battery protection circuit 17 is shipped, or a set value input by a person after the battery protection circuit 17 is shipped.

Referring to fig. 1, in some embodiments, the control circuit 20 may include a wake-up chip 21, where the wake-up chip 21 sends a wake-up signal to the portable power source 200 for turning on the portable power source 200 to power the load 400 and the power distribution device 100 in the event that the control circuit 20 receives the second electrical signal.

Specifically, in some embodiments, when the first sampling circuit 30 outputs the second electrical signal and the control circuit 20 receives the second electrical signal, the control circuit 20 can control the wake-up chip 21 to output a wake-up signal to the portable power source 200, and the portable power source 200 can be turned on after receiving the wake-up signal, so as to supply power to the load 400 and the power distribution device 100 from the portable power source 200. It should be noted that, in some embodiments, the wake-up chip 21 is a controller area network (Controller Area Network, CAN) chip with a CAN bus wake-up function, and in the present application, the wake-up chip 21 CAN send a wake-up signal to the portable power source 200, and the portable power source 200 CAN receive and identify the wake-up signal, so as to realize the turning on of the portable power source 200.

More specifically, referring to fig. 1, in some embodiments, the portable power source 200 includes a start-up circuit 201, and the start-up circuit 201 turns on the portable power source 200 when receiving a wake-up signal sent by the wake-up chip 21 of the control circuit 20. The startup circuit 201 can be communicatively connected to the wake-up chip 21, so that the startup circuit 201 can receive and identify the wake-up signal sent by the wake-up chip 21, and when the startup circuit 201 receives the wake-up signal, the startup circuit 201 can perform an on operation on the portable power source 200, so that the portable power source 200 supplies power to the load 400 and the power distribution device 100. For example, in the case where the startup circuit 201 receives the wake-up signal, the startup circuit 201 can turn on the switch of the portable power source 200.

Referring to fig. 1, in some embodiments, the power distribution apparatus 100 may further include a switching power supply 40, where the control circuit 20 is electrically connected to the utility power grid 300 and the portable power source 200 through the switching power supply 40, and the switching power supply 40 is configured to convert ac power transmitted by the utility power grid 300 and/or the portable power source 200 into dc power, and transmit the dc power to the control circuit 20.

In particular, in some embodiments, the switching power supply 40 is a device for converting an input power supply to a stable, reliable output power supply. For example, the switching power supply 40 can convert ac power transmitted by the utility power grid 300 and/or the portable power supply 200 into dc power, and transmit the dc power to the control circuit 20, and also can transmit the converted dc power to the battery 13, where the setting of the switching power supply 40 can provide stable voltage and current for the control circuit 20 and the battery 13, so as to ensure the normal operation of the power distribution device 100.

Further, in some embodiments, the power distribution apparatus 100 may further include a dc power supply 50, where the control circuit 20 is electrically connected to the switching power supply 40 and the black start circuit 10 through the dc power supply 50, and the dc power supply 50 is configured to step down the dc power input by the switching power supply 40 and transmit the stepped down dc power to the control circuit 20.

Specifically, in some embodiments, since a precise and stable operating voltage is required for a part of the components or circuits (e.g., the control circuit 20, etc.) in the power distribution apparatus 100 to meet the operating requirement, the dc power supply 50 can step down the dc power transmitted from the switching power supply 40 or the dc power transmitted from the battery 13 to a level that meets the operating requirement of the control circuit 20, and transmit the stepped down dc power to the control circuit 20, thereby ensuring the stability of the operation of the control circuit 20. It should be noted that, in some embodiments, the dc power supply 50 may be a 5V power supply, the voltage of the dc power transmitted by the switching power supply 40 or the battery 13 may be 15V, in which case, the dc power supply 50 can step down the voltage of the dc power input by the switching power supply 40 to 5V, and transmit the dc power with the voltage of 5V to the control circuit 20.

With continued reference to fig. 1, in some embodiments, the power distribution apparatus 100 may further include a power switching circuit 60, the control circuit 20 is electrically connected to the load 400 through the power switching circuit 60, the utility grid 300 and the portable power source 200 are both electrically connected to the power switching circuit 60, and the power switching circuit 60 is configured to selectively switch on the utility grid 300 and the load 400 or switch on the portable power source 200 and the load 400.

Further, in some embodiments, the power switch circuit 60 may include a conducting switch 61 and a conducting line 63 electrically connected to the load 400, and the power switch module may control the conducting switch 61 to selectively conduct the utility grid 300 and the load 400, or conduct the portable power source 200 and the load 400, in other words, the power switch module may control the conducting switch 61 to conduct the utility grid 300 and the conducting line 63, or conduct the portable power source 200 and the conducting line 63. Specifically, in some embodiments, in the event that the utility grid 300 is powered up, i.e., in the event that the utility grid 300 is able to supply power to the load 400 normally, the control circuit 20 is able to control the on switch 61 in the power switch circuit 60 to conduct the electrical connection between the utility grid 300 and the conductive line 63, thereby enabling electrical energy of the utility grid 300 to be transferred to the load 400 through the conductive line 63 to maintain normal operation of the load 400. In the case that the utility power grid 300 is powered down and the portable power source 200 is capable of supplying power to the load 400, the control circuit 20 can control the on switch 61 in the power switch circuit 60 to conduct the electrical connection between the portable power source 200 and the conductive line 63, so that the electrical energy of the portable power source 200 can be transmitted to the load 400 through the conductive line 63 to maintain the normal operation of the load 400.

Referring to fig. 1, a power distribution system 1000 according to an embodiment of the present application includes a portable power source 200, a utility power grid 300, a load 400, and the power distribution device 100 according to any of the above embodiments, where the portable power source 200, the utility power grid 300, and the load 400 are electrically connected to the power distribution device 100. The portable power source 200 and the load 400 in this embodiment are substantially the same as the portable power source 200 and the load 400 in the above embodiment, and a detailed description thereof is omitted.

Specifically, referring to fig. 4, in some embodiments, a plurality of interfaces are provided between the portable power source 200 and the power distribution device 100, and the portable power source 200 and the power distribution device 100 are connected through the plurality of interfaces, so that the portable power source 200 and the power distribution device 100 can perform functions such as power supply, data transmission and communication. More specifically, in some embodiments, multiple interfaces may perform different functions, as well as transmitting different signals. For example, "+5v" may represent a 5V power interface through which portable power source 200 may enable power transfer; "CANL" and "CANH" are communication interfaces through which the portable power source 200 and the power distribution apparatus 100 can realize signal transmission; "GND" is a ground interface, and the arrangement of the ground interface can ensure correct transmission of signals and stable operation of the power distribution device 100 and the portable power source 200; "AC-L" and "AC-N" are AC power interfaces, where "AC-L" represents the line of an AC power source, and "AC-N" represents the neutral line of an AC power source, through which portable power source 200 can be powered by AC current.

In the power distribution system 1000 of the present application, when the utility power grid 300 is powered down, the second sampling circuit 11 outputs the first electrical signal, the battery 13 receives the first electrical signal and then supplies power to the control circuit 20, after the control circuit 20 is powered up, the first sampling circuit 30 outputs the second electrical signal, and the control circuit 20 wakes the portable power source 200 to supply power to the load 400 and the power distribution device 100 after receiving the second electrical signal, so that the portable power source 200 can realize the standby power function without always keeping the standby state on, thereby reducing the power consumption of the portable power source 200, reducing the energy waste and reducing the power supply cost.

In the description of the present specification, reference to the terms "certain embodiments," "in one example," "illustratively," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the present 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A power distribution apparatus, comprising: the black start circuit comprises a second sampling circuit and a battery, wherein the second sampling circuit is electrically connected with the battery, a mains supply power grid and a portable power supply, the control circuit is electrically connected with the battery, the mains supply power grid, the portable power supply and a load, one end of the first sampling circuit is electrically connected with the control circuit, the other end of the first sampling circuit is electrically connected with the mains supply power grid, and the first sampling circuit and the second sampling circuit are both used for sampling the mains supply power grid; wherein:

Under the condition that the mains supply network is powered down, the second sampling circuit outputs a first electric signal, and the battery supplies power to the control circuit after receiving the first electric signal; after the control circuit is powered on, the first sampling circuit outputs a second electric signal, and the control circuit wakes up the portable power supply to supply power to the load and the power distribution equipment after receiving the second electric signal.

2. The power distribution apparatus according to claim 1, wherein the second sampling circuit outputs a third electric signal in a case where the portable power source supplies power to the load and the power distribution apparatus, and the battery stops supplying power to the control circuit after receiving the third electric signal.

3. The power distribution apparatus of claim 1 wherein the black start circuit further comprises:

And the bidirectional charge and discharge circuit is electrically connected with the control circuit, the second sampling circuit and the battery, and after the bidirectional charge and discharge circuit receives the first electric signal, the battery generates electric energy and transmits the electric energy to the control circuit through the bidirectional charge and discharge circuit.

4. The power distribution apparatus of claim 3 wherein the black start circuit further comprises:

The battery protection circuit is electrically connected with the battery and the bidirectional charge-discharge circuit, and the battery protection circuit conducts the electric connection between the bidirectional charge-discharge circuit and the battery under the condition that the voltage of the battery is lower than a preset threshold value; and under the condition that the voltage of the battery is higher than a preset threshold value, the battery protection circuit breaks the electrical connection between the bidirectional charge and discharge circuit and the battery.

5. The power distribution device of claim 1, wherein the control circuit includes a wake-up chip that sends a wake-up signal to the portable power source to turn on the portable power source to power the load and the power distribution device if the control circuit receives the second electrical signal.

6. The power distribution apparatus of claim 1, wherein the power distribution apparatus further comprises:

The control circuit is electrically connected with the commercial power grid and the portable power supply through the switch power supply, and the switch power supply is used for converting alternating current transmitted by the commercial power grid and/or the portable power supply into direct current and transmitting the direct current to the control circuit.

7. The power distribution apparatus of claim 6, further comprising:

The control circuit is electrically connected with the switch power supply and the black start circuit through the direct current power supply, and the direct current power supply is used for reducing the direct current input by the switch power supply and transmitting the reduced direct current to the control circuit.

8. The power distribution apparatus of claim 1, wherein the power distribution apparatus further comprises:

The control circuit is electrically connected with the load through the power switch circuit, the commercial power grid and the portable power source are electrically connected with the power switch circuit, and the power switch circuit is used for selectively conducting the commercial power grid and the load or conducting the portable power source and the load.

9. A power distribution system, comprising:

A portable power source, a utility grid, a load and the power distribution device of any of claims 1-8, the portable power source, the utility grid and the load all being electrically connected to the power distribution device.

10. The power distribution system of claim 9, wherein the portable power source includes a startup circuit that turns on the portable power source upon receiving a wake-up signal sent by a wake-up chip of the control circuit.