CN115459248A - Power distribution circuit, power distribution method and electric equipment - Google Patents
Power distribution circuit, power distribution method and electric equipment Download PDFInfo
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- CN115459248A CN115459248A CN202211104742.XA CN202211104742A CN115459248A CN 115459248 A CN115459248 A CN 115459248A CN 202211104742 A CN202211104742 A CN 202211104742A CN 115459248 A CN115459248 A CN 115459248A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
- H02J3/00125—Transmission line or load transient problems, e.g. overvoltage, resonance or self-excitation of inductive loads
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Abstract
The embodiment of the application provides a power distribution circuit, a power distribution method and power utilization equipment, wherein the circuit comprises: a power supply module; the first power supply module is connected with the power distribution module so as to form a first power supply network together with the power distribution module; the second power supply module is connected with the power distribution module so as to form a second power supply network together with the power distribution module; the power distribution module comprises a plurality of load interfaces, each of which is connected to the first and/or second power supply network; and the first switch module is arranged between the load interface and the specified power supply network and is used for controlling the connection or disconnection of a path between the load interface and the specified power supply network, and the specified power supply network is the first power supply network or the second power supply network. The distribution circuit provided by the embodiment of the application can realize the independent isolation of the load with a fault, and the specified power supply network can supply power for other loads connected with the specified power supply network, so that the power supply efficiency of the distribution circuit is improved.
Description
Technical Field
The present application relates to the field of power distribution technologies, and in particular, to a power distribution circuit, a power distribution method, and a power consumption device.
Background
At present, electric equipment usually has the demand of redundant power supply, and in order to solve above-mentioned demand, the technical staff adopts two electric wire netting power supply modes for electric equipment design.
In the dual-grid power supply mode, the user equipment comprises a main grid and an auxiliary grid, and an isolator is arranged between the main grid and the auxiliary grid to avoid mutual influence between the main grid and the auxiliary grid. When a power supply module in a certain power grid or a load connected to the power grid fails, the power grid usually stops supplying power to avoid burning out the load or the power supply module.
However, when a fault occurs in a load connected to the power grid, the power grid stops supplying power, and the power grid cannot supply power to other loads connected to the power grid, so that the power supply efficiency is low.
Disclosure of Invention
The embodiment of the application provides a power distribution circuit, a power distribution method and electric equipment.
In a first aspect, an embodiment of the present application provides a power distribution circuit, which includes a power distribution module; the first power supply module is connected with the power distribution module so as to form a first power supply network together with the power distribution module; the second power supply module is connected with the power distribution module so as to form a second power supply network together with the power distribution module; the power distribution module comprises a plurality of load interfaces, each load interface being connected to the first and/or second power supply network; and the first switch module is arranged between the load interface and the specified power supply network and is used for controlling the connection or disconnection of a path between the load interface and the specified power supply network, and the specified power supply network is the first power supply network or the second power supply network.
In a second aspect, an embodiment of the present application provides a power distribution method, which is applied to a power distribution circuit as described in the first aspect, and at least one load interface exists in the power distribution circuit, and a load is connected to the power distribution circuit, where the method includes: acquiring a target current, wherein the target current is a current flowing through a target load; generating a first control signal aiming at a specified switch module according to the target current, wherein the specified switch module is a first switch module arranged between a target load interface and a specified power supply network, the target load interface is connected with a target load, and the specified power supply network is a first power supply network or a second power supply network; and controlling the first switch module to be closed or opened according to the first control signal.
In a third aspect, embodiments of the present application provide a powered device, where the powered device includes a plurality of loads, and the power distribution circuit is as described in the first aspect, and the plurality of loads may be connected with a plurality of load interfaces.
The embodiment of the application provides a power distribution circuit, a power distribution method and electric equipment, wherein a first switch module is arranged between a load interface and a specified power supply network, the first switch module is used for controlling the conduction or disconnection of a path between the specified power supply network and the load interface, when a load connected with the load interface breaks down, the first switch module is opened, so that the path between the specified power supply network and the load interface is controlled to be disconnected, the independent isolation of the broken load is realized, the specified power supply network can also supply power for other connected loads, and the power supply efficiency of the power distribution circuit is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram of a power distribution circuit provided by an embodiment of the present application.
Fig. 2 is a block diagram of a power distribution circuit provided by an embodiment of the present application.
Fig. 3 is a flowchart of a power distribution method according to an embodiment of the present application.
Fig. 4 is a flowchart of a power distribution method according to another embodiment of the present application.
Fig. 5 is a flowchart of a power distribution method according to another embodiment of the present application.
Fig. 6 is a block diagram of a powered device provided in an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Based on the above problem, an embodiment of the present application provides a power distribution circuit, where a first switch module is disposed between a load interface and a specified power supply network, and the first switch module is used to control a path between the specified power supply network and the load interface to be turned on or turned off, and when a load connected to the load interface fails, the first switch module is turned on, so as to control the path between the specified power supply network and the load interface to be turned off, thereby implementing individual isolation of the failed load, and at this time, the specified power supply network may also supply power to other loads connected thereto, thereby improving power supply efficiency of the power distribution circuit.
Referring to fig. 1, a block diagram of a power distribution circuit 100 according to an embodiment of the present application is schematically shown, where the circuit 100 includes: the power distribution module comprises a first power supply module 110, a power distribution module 120, a second power supply module 130, a load interface 140 and a first switch module 150.
The first power supply module 110 is connected to the power distribution module 120 to form a first power supply network 11 together with the power distribution module. The first power supply module 110 is used to supply power to a load connected to the first power supply network 11. Optionally, the first power supply module 110 may also supply power to the power distribution module 120.
A second power supply module 130 is connected to the power distribution module 120 to form a second power supply network 12 together with the power distribution module. The second power supply module 130 is used to supply power to the loads connected to the second power supply network 12. Optionally, the second power supply module 130 may also supply power to the power distribution module 120.
The power distribution module 120 is used to distribute the power of the first power supply module 110 and/or the second power supply module 130. The power distribution module 120 includes a plurality of load interfaces 140, and the plurality of load interfaces 140 are connected to the first power supply network 11 and/or the second power supply network 12 for connecting a plurality of loads, so that the power distribution module 120 can distribute power to the plurality of loads. The load interface 140 has one end for connecting a load and the other end connected to the first power supply module 110 and/or the second power supply module 130. The embodiments of the present application do not exclude other specific connection manners, and the connection manner shown in fig. 1 does not limit the present application.
The first switch module 150 is disposed between the load interfaces 140 and a specific power supply network, and is configured to control connection or disconnection of paths between the plurality of load interfaces 140 and the specific power supply network, where the specific power supply network is the first power supply network 11 or the second power supply network 12. The first switch module 150 has one end connected to the first load interface 141 and the other end connected to the first power supply module 110 and/or the second power supply module 130. Other specific connection modes are not excluded in the embodiments of the present application, and the connection mode shown in fig. 1 is not limited to the present application. When the first switch module 150 is closed, the path between the load interface 140 and the specified power supply network is conducted; when the first switch module 150 is opened, the path between the load interface 140 and the designated power supply network is disconnected.
In the embodiment of the present application, the power distribution module 120 may control the first switch module 150 to be closed or opened according to the power supply requirement and the power supply parameter of the load, for example, control the first switch module 150 to be opened when the current flowing through the load is too large, so as to cut off the connection between the specified power supply network and the load, on one hand, by disconnecting the connection between the specified power supply network and the load, the power supply safety is improved, and irreversible damage to the power supply module or the load is avoided, and on the other hand, the specified power supply network may also continue to supply power to other loads, so as to improve the power supply efficiency of the power distribution circuit.
The number of the first switch modules 150 is actually determined according to the number of the load interfaces 140, and specifically, the number of the first switch modules 150 is the same as the number of the load interfaces 140, that is, the first switch modules 150 are disposed on a path between each load interface 140 and a specified power supply network.
To sum up, the distribution circuit that this application embodiment provided sets up first switch module between load interface and appointed supply network, and first switch module is used for controlling the route between appointed supply network and this load interface to switch on or break off, and when the load that load interface is connected breaks down, first switch module opens to make the route between appointed supply network of control and the load interface break off, realize the individual isolation to the load that breaks down, appointed supply network still can supply power for other loads that it connects this moment, improves distribution circuit's power supply efficiency.
Referring to fig. 2, a block diagram of a power distribution circuit 100 according to an embodiment of the present application is schematically shown, where the circuit 100 includes: the power supply system comprises a first power supply module 110, a power distribution module 120, a second power supply module 130, a load interface and a first switch module.
Unlike the embodiment of fig. 1, in the embodiment of fig. 2, the load interface includes a first load interface 141 and a second load interface 142.
The first load interface 141 is used to connect a first load. The first load interface 141 is connected to both the first supply network 11 and the second supply network 12, i.e. both supply networks can supply the first load to which the first load interface 141 is connected. One end of the first load interface 141 is used for connecting a first load, and the other end is connected to the first power supply module 110 and the second power supply module 130, respectively. The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application.
The consumer (which is provided with the power distribution circuit 100) may determine the first load connected to the first load interface 141 based on the safety performance requirements, importance, priority requirements of the load. Taking an automatic driving scenario as an example, the vehicle may determine loads, such as a motor control system, a brake control system, an anti-lock braking system, and the like, which are strongly related to safety of automatic driving, as first loads, and connect to the first load interface 141, so as to meet a redundant power supply requirement of the loads, and even if a certain power supply network fails, the vehicle may supply power to the loads through another power supply network, so as to ensure normal operation of the loads.
The second load interface 142 is used to connect a second load. The second load interface 142 is connected to the first power supply network 11, or the second load interface 142 is connected to the second power supply network 12. I.e. only one of the two power supply networks supplies the second load connected to the second load interface 142. One end of the second load interface 142 is used for connecting a second load, and the other end is connected to the first power supply module 110 or the second power supply module 130. The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application.
The consumer may determine the second load connected to the second load interface 142 based on the safety performance requirements, importance level, and priority requirements of the load. Taking the autopilot scenario as an example, the vehicle may determine a load, such as a light system, a sound system, etc., that is weakly related to safety of autopilot, as the second load, and connect to the second load interface 142.
In the embodiment of the present application, the first switching module includes a first switching submodule 151 and a second switching submodule 152.
A first switching submodule 151 is provided between the first load interface 141 and the first supply network 11 for controlling the conduction or disconnection of a path between the first load interface 141 and the first supply network 11. One end of the first switch submodule 151 is connected to the first load interface 141, and the other end is connected to the first power supply module 110. The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application. When the first switching submodule 151 is closed, the path between the first load interface 141 and the first supply network 11 is conductive; when the first switching sub-module 151 is open, the path between the first load interface 141 and the first power supply network 11 is disconnected. In the present embodiment, in the case that the first power supply network 11 supplies power to the first load connected to the first load interface 141, the first switching submodule 151 is closed.
In this embodiment, the first switch submodule 151 may be a first smart fuse encapsulated with a first switch element, where the first smart fuse can implement a current detection function and a current reporting function, and can also implement a state control function for the first switch element inside the first switch submodule, for example, the first switch element is controlled to switch from a closed state to an open state according to an open control signal, or the first switch element is controlled to switch from the open state to the closed state according to the close control signal. The first switch element may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), which is hereinafter referred to as an MOS Transistor, or may be a triode, a silicon controlled rectifier, a relay, or the like. The MOS tube can be an N-type MOS tube or a P-type MOS tube. In fig. 2, the first switch submodule 151 includes a third switch S3 and a fifth switch S5.
A second switching submodule 152 is provided between the first load interface 141 and the second power supply network 12 for controlling the conduction or the disconnection of the path between the first load interface 141 and the second power supply network 12. One end of the second switch submodule 152 is connected to the first load interface 141, and the other end is connected to the second power supply module 130. The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application. When the second switching sub-module 152 is closed, the path between the first load interface 141 and the second supply network 12 is conductive; when the second switching sub-module 152 is open, the path between the first load interface 141 and the second power supply network 12 is disconnected. In the embodiment of the present application, in the case that the second power supply network 12 supplies power to the first load connected to the first load interface 141, the second switching submodule 152 is closed.
In this embodiment, the second switch submodule 152 may be a second smart fuse encapsulated with a second switch element, where the second smart fuse can implement a current detection function and a current reporting function, and can also implement a state control function for the second switch element inside the second switch submodule, for example, the first switch element is controlled to switch from a closed state to an open state according to an open control signal, or the first switch element is controlled to switch from the open state to the closed state according to the close control signal. The second switch element may be a MOS transistor, or may be a triode, a thyristor, a relay, or the like. The MOS tube can be an N-type MOS tube or a P-type MOS tube. In fig. 2, the second switch submodule 152 includes a fourth switch S4 and a sixth switch S6.
When the first switch submodule 151 is closed, the second switch submodule 152 is opened. Conversely, in the case where the first switching submodule 151 is open, the second switching submodule 152 is closed. That is, only one of the first and second switch sub-modules 151 and 152 is normally in the closed state. By the aid of the mode, the problems that two power supply networks simultaneously supply power to the first load, the electric quantity is wasted, potential safety hazards exist and the like can be avoided, power supply safety is improved, and the electric quantity is saved.
In the embodiment of the present application, the first switch module further includes a seventh switch sub-module 153. The seventh switch sub-module 153 is disposed between the second load interface 142 and the first power supply network 11, and is used for controlling the connection or disconnection of a path between the second load interface 142 and the first power supply network 11. Alternatively, a seventh switch sub-module 153 is provided between the second load interface 142 and the second power supply network 12 for controlling the conduction or disconnection of the path between the second load interface 142 and the second power supply network 12. One end of the seventh switch sub-module 153 is connected to the second load interface 142, and the other end is connected to the first power supply module 110. Alternatively, one end of the seventh switch sub-module 153 is connected to the second load interface 142, and the other end is connected to the second power supply module 130. The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application. In the case that the seventh switch sub-module 153 is provided at the second load interface 142 and the first power supply network 11, if the seventh switch sub-module 153 is closed, the path between the second load interface 142 and the first power supply network 11 is conductive; if the seventh switch sub-module 153 is open, the path between the second load interface 142 and the first supply network 11 is disconnected. In the case where the seventh switch sub-module 153 is provided between the second load interface 142 and the second power supply network 12, if the seventh switch sub-module 153 is closed, the path between the second load interface 142 and the second power supply network 12 is conductive; if the seventh switch sub-module 153 is open, the path between the second load interface 142 and the second power supply network 12 is disconnected.
In this embodiment of the application, the seventh switch sub-module 153 may be a seventh smart fuse packaged with a seventh switch element, where the seventh smart fuse can implement a current detection function and a current reporting function, and also implement a state control function for the seventh switch element inside the seventh switch sub-module, for example, the seventh switch element is controlled to be switched from a closed state to an open state according to an open control signal, or the seventh switch element is controlled to be switched from the open state to the closed state according to a close control signal. The seventh switching element may be an MOS transistor, or may be a triode, a thyristor, a relay, or the like. The MOS tube can be an N-type MOS tube or a P-type MOS tube. In fig. 2, the seventh switch sub-module 153 includes a first switch S1 and a second switch S2.
Unlike the embodiment of fig. 1, the circuit 100 further includes a second switch module 210. The second switching module 210 is disposed between the first power supply module 110 and the power distribution module 120, and is used for controlling the connection or disconnection of the path between the first power supply module 110 and the power distribution module 120. One end of the second switch module 210 is connected to the first power supply module 110, and the other end is connected to the first switch module 150. Specifically, the other end of the second switch module 210 connects the first switch sub-module 151 and the seventh switch sub-module 153. The embodiments of the present application do not exclude other specific connection manners, and the connection manner shown in fig. 2 is not limited to the present application. When the second switch module 210 is closed, the path between the first power supply module 110 and the power distribution module 120 is conducted; when the second switching module 210 is opened, the path between the first power supply module 110 and the power distribution module 120 is opened. In the embodiment of the present application, the power distribution module 120 may control the second switch module 210 to be closed or opened according to the state of the first power supply module 110, for example, control the second switch module 210 to be opened when the voltage at the output end of the first power supply module 210 is too large, so as to cut off the connection between the first power supply module 110 and the power distribution module 120, to improve the power supply safety and avoid irreversible damage to the first power supply module 110 or the load.
In the present embodiment, the first power supply module 110 includes a first dc converter 111 and a first battery 112. The first dc converter 111 and the first battery 112 are connected to both ends of the power distribution module 120, respectively. That is, the first dc converter 111 is connected to one end of the power distribution module 120, and the first battery 112 is connected to the other end of the power distribution module 120. The first dc converter 111 and the first storage battery 112 may alternatively be used as power sources in the first power supply network 11.
In the present embodiment, the second switching module 210 includes a third switching sub-module 211 and a fourth switching sub-module 212.
The third switching sub-module 211 is disposed between the first dc converter 111 and the power distribution module 120, and is used for controlling on/off of a path between the first dc converter 111 and the power distribution module 120. One end of the third switching module 211 is connected to the first dc converter 111, and the other end is connected to the first switching module 150. The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application. When the third switching sub-module 211 is closed, the path between the first dc converter 111 and the power distribution module 120 is conductive; when the third switching sub-module 211 is open, the path between the first dc converter 111 and the power distribution module 120 is open. In the embodiment of the present application, the power distribution module 120 may control the second switch module 210 to be closed or opened according to the state of the first dc converter 111, for example, control the third switch sub-module 211 to be opened when the voltage at the output end of the first dc converter 111 is too large, so as to cut off the connection between the first dc converter 111 and the power distribution module 120, so as to improve the power supply safety and avoid irreversible damage to the first dc converter 111 or the load.
The third switch submodule 211 may be a third intelligent fuse encapsulated with a third switch element, where the third intelligent fuse can implement a voltage detection function and a voltage reporting function, and can also implement a state control function on the third switch element inside the third intelligent fuse. The third switching element may be a MOS transistor, a triode, a thyristor, a relay, or the like. The MOS tube can be an N-type MOS tube or a P-type MOS tube.
In fig. 2, the third switch submodule 211 includes a ninth switch Q1, the third switch element is a double-back MOS transistor, and includes two N-type MOS transistors, a D-pole of the first MOS transistor is connected to the output terminal of the first dc converter 111, an S-pole of the first MOS transistor is connected to an S-pole of the second MOS transistor, and a D-pole of the second MOS transistor is connected to the control terminal of the first switch module 150 (specifically, includes the first switch submodule 151 and the seventh switch submodule 153).
The fourth switch sub-module 212 is disposed between the first battery 112 and the power distribution module 120, and is used for controlling the connection or disconnection of the path between the first battery 112 and the power distribution module 120. One end of the fourth switch sub-module 212 is connected to the first battery 112, and the other end is connected to a control end of the first switch module 150 (specifically, including the first switch sub-module 151 and the seventh switch sub-module 153). The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application. When the fourth switch sub-module 212 is closed, the path between the first battery 112 and the power distribution module 120 is conductive; when the fourth switch sub-module 212 is opened, the path between the first battery 112 and the power distribution module 120 is broken. In the embodiment of the present application, the power distribution module 120 may control the fourth switch sub-module 212 to close or open according to the state of the first battery 112, for example, control the fourth switch sub-module 212 to open when the voltage at the output end of the first battery 112 is too large, so as to cut off the connection between the first battery 112 and the power distribution module 120, so as to improve the power supply safety and avoid irreversible damage to the first battery 112 or the load.
The fourth switch submodule 212 may be a fourth smart fuse encapsulated with a fourth switching element, where the fourth smart fuse can implement a voltage detection function and a voltage reporting function, and can also implement a state control function on the fourth switching element inside the fourth smart fuse. The fourth switch element can be an MOS tube, a triode, a silicon controlled rectifier or a relay and the like. The MOS tube can be an N-type MOS tube or a P-type MOS tube. In fig. 2, the fourth switch submodule 212 includes a seventh switch S7, and the fourth switch element is an N-type MOS transistor, a D pole of the N-type MOS transistor is connected to the control terminal of the first switch submodule 151, and an S pole of the N-type MOS transistor is connected to the output terminal of the first battery 112.
It should be noted that, in the case that the third switch submodule 211 is closed, the fourth switch submodule 212 is opened. Conversely, with the third switch submodule 211 open, the fourth switch submodule 212 is closed. That is, there is typically only one of the third switch submodule 211 and the fourth switch submodule 212 in the closed state. By the above manner, the problems of electric quantity waste, potential safety hazards and the like caused by the fact that the first direct current converter 111 and the first storage battery 112 simultaneously supply power to the load connected to the first power supply network 11 can be avoided, power supply safety is improved, and electric quantity is saved.
Unlike the embodiment of fig. 1, the circuit 100 further includes a third switching module 220. The third switching module 220 is disposed between the second power supply module 130 and the power distribution module 120, and is used for controlling the connection or disconnection of the path between the second power supply module 130 and the power distribution module 120. In fig. 2, one end of the third switch module 220 is connected to the second power supply module 130, and the other end is connected to the control end of the first switch module 150 (specifically, including the second switch submodule 152 and the seventh switch submodule 153). The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application. When the third switching module 220 is closed, the path between the second power supply module 130 and the power distribution module 120 is conducted; when the third switching module 220 is opened, the path between the second power supply module 130 and the power distribution module 120 is opened. In the embodiment of the present application, the power distribution module 120 may control the third switching module 220 to be closed or opened according to the state of the second power supply module 130, for example, control the third switching module 220 to be opened when the voltage at the output end of the second power supply module 130 is too large, so as to cut off the connection between the second power supply module 130 and the power distribution module 120, to improve the power supply safety and avoid irreversible damage to the second power supply module 130 or the load.
In the embodiment of the present application, the second power supply module 130 includes a second dc converter 131 and a second battery 132. The second dc converter 131 and the second battery 132 are connected to both ends of the power distribution module 120, respectively. That is, the second dc converter 131 is connected to one end of the power distribution module 120, and the second battery 132 is connected to the other end of the power distribution module 120. The second dc converter 131 and the second battery 132 may alternatively be used as power sources in the second power supply network 12. Second dc converter 131 may also charge second battery 132.
In the present embodiment, the third switch module 220 includes a fifth switch sub-module 221 and a sixth switch sub-module 222.
The fifth switching sub-module 221 is disposed between the second dc converter 131 and the power distribution module 120, and is configured to control connection and disconnection of a path between the second dc converter 131 and the power distribution module 120. In fig. 2, one end of the fifth switch submodule 221 is connected to the second dc converter 131, and the other end is connected to the control end of the first switch module 150 (specifically, the second switch submodule 152 and the seventh switch submodule 153). The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application. When the fifth switching sub-module 221 is closed, the path between the second dc converter 131 and the power distribution module 120 is conducted; when the fifth switching sub-module 221 is opened, the path between the second dc converter 131 and the power distribution module 120 is opened. In the embodiment of the present application, the power distribution module 120 may control the fifth switching sub-module 221 to be closed or opened according to the state of the second dc converter 131, for example, when the voltage at the output end of the second dc converter 131 is too large, the fifth switching sub-module 221 is controlled to be opened, so as to cut off the connection between the second dc converter 131 and the power distribution module 120, so as to improve the power supply safety and avoid irreversible damage to the second dc converter 131 or the load.
The fifth switch submodule 221 may be a fifth intelligent fuse encapsulated with a fifth switch element, where the fifth intelligent fuse can implement a voltage detection function and a voltage reporting function, and can also implement a state control function on the fifth switch element inside the fifth intelligent fuse. The fifth switching element may be a MOS transistor, a triode, a thyristor, a relay, or the like. The MOS tube can be an N-type MOS tube or a P-type MOS tube.
In fig. 2, the fifth switch submodule 221 includes a tenth switch Q2, and the fifth switch element is a double-back MOS transistor, and the connection manner thereof can refer to the description about the third switch element.
The sixth switching sub-module 222 is disposed between the second battery 132 and the power distribution module 120, and is used for controlling the connection or disconnection of the path between the second battery 132 and the power distribution module 120. In fig. 2, one end of the sixth switch sub-module 222 is connected to the second battery 132, and the other end is connected to the control end of the first switch module 150 (specifically, including the second switch sub-module 152 and the seventh switch sub-module 153). The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application. When the sixth switching sub-module 222 is closed, the path between the second battery 132 and the power distribution module 120 is conductive; when the sixth switching sub-module 222 is open, the path between the second battery 132 and the power distribution module 120 is open. In the embodiment of the present application, the power distribution module 120 may control the sixth switch sub-module 222 to close or open according to the state of the second battery 132, for example, control the sixth switch sub-module 222 to open when the voltage at the output end of the second battery 132 is too large, so as to cut off the connection between the second battery 132 and the power distribution module 120, so as to improve the power supply safety and avoid irreversible damage to the second battery 132 or the load.
The sixth switch submodule 222 may be a sixth intelligent fuse encapsulated with a sixth switching element, where the sixth intelligent fuse can implement a voltage detection function and a voltage reporting function, and can also implement a state control function on the sixth switching element inside the sixth intelligent fuse. The sixth switching element may be an MOS transistor, or may be a triode, a thyristor, a relay, or the like. The MOS tube can be an N-type MOS tube or a P-type MOS tube. In fig. 2, the sixth switch sub-module 222 includes an eighth switch S8, and the sixth switch element is an N-type MOS transistor, and the connection manner of the sixth switch element can refer to the description about the fourth switch element.
When the fifth switch submodule 221 is closed, the sixth switch submodule 222 is opened. Conversely, with the fifth switch sub-module 221 open, the sixth switch sub-module 222 is closed. That is, only one of the fifth switch sub-module 221 and the sixth switch sub-module 222 is normally in the closed state. In this way, the problems of electric quantity waste, potential safety hazards and the like caused by the fact that the second direct current converter 131 and the second storage battery 132 supply power to the loads connected to the second power supply network at the same time can be avoided, power supply safety is improved, and electric quantity is saved.
Unlike the embodiment of fig. 1, the circuit 100 further includes a fourth switching module 230. The fourth switching module 230 is disposed between the second switching module 210 and the third switching module 230, and is used for controlling the connection or disconnection of a path between the first power supply network 11 and the second power supply network 12. Specifically, one end of the fourth switch module 230 is connected to the common terminal of the third switch submodule 211 and the fourth switch submodule 212, the first switch module 150 (specifically including the first switch submodule 151 and the seventh switch submodule 153), and the other end is connected to the common terminal of the fifth switch submodule 221 and the sixth switch submodule 222, the first switch module 150 (specifically including the second switch submodule 152 and the seventh switch submodule 153). The embodiments of the present application do not exclude other specific connection modes, and the connection mode shown in fig. 2 is not limited to the present application. When the fourth switching module 230 is closed, the path between the first supply network 11 and the second supply network 12 is conductive; when the fourth switching module 230 is opened, the path between the first supply network 11 and the second supply network 12 is opened. In the embodiment of the present application, the fourth switching module 230 is in a normally open state.
In the embodiment of the present application, the power distribution module 120 may control the fourth switching module 230 to be closed or opened according to the states of the first power supply network 11 and the second power supply network 12, for example, when the first power supply network 11 can supply power normally but the second power supply network 12 cannot supply power normally, the fourth switching module 230 is controlled to be closed to conduct a path between the first power supply network 11 and the second power supply network 12, so that the first power supply network 11 can supply power redundantly to the loads connected to the second power supply network 12; alternatively, when the second supply network 12 can supply power normally but the first supply network 11 cannot supply power normally, the fourth switching module 230 is controlled to close to switch on the path between the first supply network 11 and the second supply network 12, so that the second supply network 12 can supply the loads connected to the first supply network 11 redundantly.
The fourth switch module 230 may be an eighth intelligent fuse packaged with an eighth switch element, and the eighth intelligent fuse can implement a voltage detection function and a voltage reporting function, and can also implement a state control function on the eighth switch element inside the eighth intelligent fuse. The eighth switching element may be an MOS transistor, or may be a triode, a thyristor, a relay, or the like. The MOS tube can be an N-type MOS tube or a P-type MOS tube.
In fig. 2, the fourth switch module 230 includes an eleventh switch Q3, the eighth switch element is a dual-back MOS transistor including two N-type MOS transistors, a D-pole of the first MOS transistor is connected to a D-pole of the second MOS transistor of the first switch submodule 151, an S-pole of the first MOS transistor is connected to an S-pole of the second MOS transistor, and a D-pole of the second MOS transistor is connected to a D-pole of the second MOS transistor of the second switch submodule 152.
In summary, the embodiments of the present application provide a power distribution circuit, in which a switch module (including a second switch module and a third switch module) is disposed between a power supply module (including a first power supply module and a second power supply module) and a power distribution module, so that when a fault occurs in the power supply module, a path between the power supply module and the power distribution module is disconnected, so as to protect the power supply module and a load; in addition, set up switch module (fourth switch module) between first distribution network and second distribution network to when one of them supply network can't work, control this switch module closure, with the route between first supply network and the second supply network that switches on, make the supply network of normal work can supply power for the load that the supply network of unable normal work is connected, thereby realize redundant power supply, improve power supply efficiency.
Referring to fig. 3, an embodiment of the present application provides a power distribution method, which may be applied to a power distribution module, and at least one load interface exists in a power distribution circuit and is connected to a load. The method may include steps S310 to S330.
In step S310, a target current is obtained.
The target current refers to a current flowing through a target load. The target load may be any load to which the power distribution circuit is connected. In the above embodiment, the first smart fuse, the second smart fuse, and the seventh smart fuse have current detecting and reporting functions, so that the power distribution module can receive the current value reported by the smart fuses.
Step S320, generating a first control signal for the designated switch module according to the target current.
The designated switch module is a first switch module arranged between the target load interface and a designated power supply network, the target load interface is connected with the target load, and the designated power supply network is a first power supply network or a second power supply network.
In the embodiment of the application, the power distribution module controls the target load according to the current flowing through the target load, and if the current is too large, the specified switch module is controlled to be switched off, so that the path between the specified power supply network and the target load interface is switched off.
Under the condition that the load interface is the first load interface, if a first switch submodule included in the first switch module is in a closed state and a second switch submodule is in an open state, if the target current is larger than a first current threshold, a first open signal aiming at the first switch submodule is generated so as to control the first switch submodule to be switched from the closed state to the open state, at the moment, a path between the first power supply network and the target load interface is disconnected, and the first power supply network cannot supply power for the first load. In some embodiments, the power distribution module further generates a first close signal for a second switching sub-module when a path between the second power supply network and the target load interface is conductive, the second power supply network
The network supplies power to the first load.
Under the condition that the load interface is the first load interface, if a first switch submodule included in the first switch module is in an open state and a second switch submodule is in a closed state, if the target current is larger than a first current threshold, a second opening signal aiming at the second switch submodule is generated so as to control the second switch submodule to be switched from the closed state to the open state, at the moment, a path between the second power supply network and the target load interface is disconnected, and the second power supply network cannot supply power for the first load. In some embodiments, the power distribution module further generates a second close signal for the first switching sub-module when a path between the first power supply network and the target load interface is conductive, the first power supply network supplying power to the first load.
If the load interface is the second load interface, if the seventh switch sub-module included in the first switch module is in a closed state, and if the target current is greater than the second current threshold, a seventh opening signal for the seventh switch sub-module is generated to control the seventh switch sub-module to be switched from the closed state to an open state, at this time, a path between the first power supply network and the target load interface is disconnected, and the specified power supply network cannot supply power to the second load. The power supply network is designated as the first power supply network or the second power supply network.
The first current threshold is determined according to the first load, which is typically a short circuit current of the first load. The second current threshold is determined according to the second load, which is typically a short circuit current of the second load. The first current threshold and the second current threshold may be equal or unequal.
And step S330, controlling the first switch module to be closed or opened according to the first control signal.
In the above embodiment, it is mentioned that the first smart fuse, the second smart fuse, and the seventh smart fuse each have a control function of the switching element.
When the first control signal is a first open signal, the smart fuse may control the switching element therein to be opened, and when the first control signal is a first close signal, the smart fuse may control the switching element therein to be closed.
In some embodiments, the smart fuse controls the switching elements therein to open or close by outputting different levels. Taking the switching element as an NMOS transistor as an example, the intelligent fuse controls to input a first level to the input end of the switching element, so that the voltage of the G-stage in the NMOS transistor is lower than the voltage of the S-stage, and the switching element is turned on because the voltage of the G-stage in the NMOS transistor cannot reach the turn-on condition of the NMOS transistor; the intelligent fuse controls the input of a second level to the input end of the switch element, so that the voltage of a G level in the NMOS tube is higher than the voltage of an S pole, the opening condition of the NMOS tube can be achieved, and the first switch element is closed. The first level is less than the second level.
In summary, the embodiment of the present application provides a power distribution method, where a first switch module is controlled to be closed or opened according to a current flowing through a target load, when the current flowing through the target load is too large, the target load is considered to have a fault with a high probability, and at this time, the first switch module is controlled to be opened to disconnect the target load from a specified power supply network, so as to implement separate isolation of the target load, and at this time, the specified power supply network can continue to supply power to other loads, thereby improving the power supply efficiency of a power distribution circuit.
Referring to fig. 4, fig. 4 is a flowchart of a power distribution method according to an embodiment of the present disclosure, where the method may be applied to a power distribution module. The method may include steps S410 to S450.
In step S410, a first target voltage is obtained.
The first target voltage refers to a voltage of an output terminal of the first power supply module. In an embodiment of the present application, the first power supply module includes a first dc converter and a first battery. The first target voltage is a voltage at an output of the first storage battery when the first storage battery supplies power to a load connected to the first power supply network. The first target voltage is a voltage at an output of the first dc converter when the first dc converter is supplying power to a load connected to the first supply network.
In the above embodiment, the third smart fuse and the fourth smart fuse have voltage detecting and reporting functions, so that the power distribution module can receive the voltage value reported by the smart fuses.
Step S420, a second control signal for the second switch module is generated according to the first target voltage.
In the embodiment of the application, the power distribution module controls the second switch module according to the magnitude of the first target voltage, and if the first target voltage is too large, the second switch module is controlled to be disconnected, so that a path between the first power supply module and the power distribution module is disconnected.
If the fourth switch sub-module comprised by the second switch module is in a closed state, it is stated that the load in the first supply network is supplied with power by the first accumulator. When the voltage of the output end of the first storage battery is greater than the first voltage threshold, a third opening signal for the fourth switch sub-module is generated to control the fourth switch sub-module to be switched from the closed state to the open state, at the moment, a path between the first storage battery and a load connected to the first power supply network is disconnected, and the first storage battery cannot supply power to the load connected to the first power supply network.
In some embodiments, the power distribution module further generates a third close signal for the third switching sub-module if the third switching sub-module is in an open state, when the path between the first dc converter and the load connected to the first power supply network is conductive, the first dc converter supplying power to the load connected to the first power supply network.
If the third switching submodule comprised by the second switching module is in the closed state, it is stated that the load in the first supply network is supplied via the first dc converter. When the voltage at the output of the first dc converter is greater than the second voltage threshold, a fourth open signal is generated for the third switching sub-module to control the third switching sub-module to switch from the closed state to the open state, at which time the path between the first dc converter and the load connected to the first supply network is open and the first dc converter is unable to supply power to the load connected to the first supply network.
The first voltage threshold and the second voltage threshold may be set experimentally or empirically, and the embodiment of the present application is not limited thereto. The first voltage threshold and the second voltage threshold may be equal or unequal.
And step S430, controlling the second switch module to be opened or closed according to the second control signal.
Step S330 of the embodiment in fig. 3 can be referred to for controlling the second switch module to open or close by the second control signal, which is not described herein again.
Step S440, after controlling the second switch module to be opened, and under the condition that the third switch module is closed, generating a fourth control signal for the fourth switch module.
In this embodiment, the power distribution module further controls the fourth switch module according to states of the second switch module and the third switch module.
In some embodiments, in the case that neither the first battery nor the first dc-converter in the first power supply module can supply the load in the first power supply network, if the second power supply network can supply power normally at this time, an eighth close signal for the fourth switching module is generated, and the eighth close signal may close the fourth switching module, so as to turn on a path between the first power supply network and the second power supply network, so that the second power supply network may supply the load connected to the first power supply network, and thus, the power supply efficiency may be improved.
And step S450, controlling the fourth switch module to be switched from the open state to the closed state according to the fourth control signal.
The step S330 in the embodiment of fig. 3 can be referred to for the fourth control signal to control the eighth switch module to open or close, and is not repeated herein.
In summary, the embodiment of the present application provides a power distribution method, where the second switch module is controlled to be turned on or off according to the voltage of the output end of the first power supply module, and when the voltage of the output end of the first power supply module is too large, the second switch module may be controlled to be turned on, so as to disconnect the connection between the load connected to the first power supply network and the first power supply module, thereby protecting the load in the first power supply network and avoiding potential safety hazards. In addition, the power supply efficiency can be improved by controlling the fourth switching module to be closed to conduct a path between the first power supply network and the second power supply network under the condition that the first power supply network cannot work normally, so that the second power supply network can supply power to the load connected with the first power supply network.
Referring to fig. 5, fig. 5 is a flowchart of a power distribution method according to an embodiment of the present application, where the method can be applied to a power distribution module. The method may include steps S510 to S550.
Step S510, a second target voltage is obtained.
The second target voltage refers to a voltage of an output terminal of the second power supply module. In an embodiment of the present application, the first power supply module includes a second dc converter and a second battery. The second target voltage is a voltage at an output of the second storage battery when the second storage battery supplies power to a load connected to the second power supply network. The second target voltage is the voltage at the output of the second dc converter when the second dc converter is supplying power to a load connected to the second supply network. In the above embodiment, the fifth smart fuse and the sixth smart fuse have voltage detecting and reporting functions, so that the power distribution module can receive the voltage value reported by the smart fuses.
In step S520, a third control signal for the third switching module is generated according to the second target voltage.
In the embodiment of the application, the power distribution module controls the power distribution module according to the magnitude of the second target voltage, and if the second target voltage is too large, the third switch module is controlled to be switched off, so that a path between the second power supply module and the power distribution module is switched off.
In the case that the second power supply module includes a second dc converter and a second battery, the third switching module includes a fifth switching submodule and a sixth switching submodule, wherein the fifth switching submodule is configured to control opening or closing of a path between the second dc converter and the power distribution module, and the sixth switching submodule is configured to control opening or closing of a path between the second battery and the power distribution module.
If the sixth switching sub-module comprised by the third switching module is in the closed state, it is stated that the load in the second supply network is supplied by the second battery. When the voltage of the output end of the second storage battery is greater than the third voltage threshold, a fifth opening signal for the sixth switch sub-module is generated to control the sixth switch sub-module to be switched from the closed state to the open state, at the moment, a path between the second storage battery and a load connected to the second power supply network is disconnected, and the second storage battery cannot supply power to the load connected to the second power supply network.
In some embodiments, if the fifth switch submodule is in the open state, the power distribution module further generates a fifth close signal for the fifth switch submodule when the path between the second dc converter and the load connected to the second supply network is conductive, and the second dc converter supplies power to the load connected to the second supply network.
If the fifth switching submodule comprised by the third switching module is in the closed state, it is stated that the load in the second supply network is supplied via the second dc converter. And when the voltage of the second direct current converter is greater than the fourth voltage threshold, generating a sixth opening signal for the fifth switch submodule to control the fifth switch submodule to be switched from the closed state to the open state, wherein a path between the second direct current converter and a load connected with the second power supply network is disconnected, and the second direct current converter cannot supply power to the load connected with the second power supply network.
The third voltage threshold and the fourth voltage threshold may be set experimentally or empirically, and the embodiment of the present application is not limited thereto. The third voltage threshold and the fourth voltage threshold may be equal or unequal.
In step S530, the third switch module is controlled to be opened or closed according to the third control signal.
The step S330 of the embodiment in fig. 3 can be referred to for the third control signal to control the third switching module to open or close, and is not repeated herein.
In step S540, after the third switch module is controlled to be opened and the second switch module is controlled to be closed, a fourth control signal is generated.
In this embodiment, the power distribution module further controls the fourth switch module according to states of the second switch module and the third switch module.
In some embodiments, in the case where neither the second storage battery nor the second dc converter in the second power supply module can supply power to the load in the second power supply network, if the first power supply network can supply power normally at this time, an eighth close signal for the fourth switching module is generated, and the eighth close signal may close the fourth switching module, so as to switch on the path between the first power supply network and the second power supply network, so that the first power supply network may supply power to the load connected to the second power supply network, and thus the power supply efficiency may be improved.
And step S550, controlling the fourth switch module to switch from an open state to a closed state according to the fourth control signal.
Step S330 of the embodiment in fig. 3 can be referred to for controlling the eighth switch module to open or close by the fourth control signal, which is not described herein again.
In summary, the embodiment of the present application provides a power distribution method, where the third switch module is controlled to be closed or opened according to the voltage of the output end of the second power supply module, and when the voltage of the output end of the second power supply module is too large, the third switch module may be controlled to be opened to disconnect the connection between the load connected to the second power supply network and the second power supply module, so as to protect the load in the second power supply network and avoid potential safety hazards. Furthermore, by controlling the fourth switching module to close to switch on the path between the first supply network and the second supply network in case the second supply network is not functioning properly, so that the second supply network can supply power to the loads connected to the first supply network, the power supply efficiency can be improved.
Referring to fig. 6, an electrical device 600 is further provided, where the electrical device 600 may be an electrical device with multiple user loads, such as a vehicle, a cabinet, and the like, and the electrical device 600 includes the electrical distribution circuit 100 according to the foregoing embodiment and multiple loads 610, where the multiple loads 610 are respectively connected to multiple load interfaces of the electrical distribution circuit 100.
Although the present application has been described with reference to the preferred embodiments, it is to be understood that the present application is not limited to the disclosed embodiments, but rather, the present application is intended to cover various modifications, equivalents and alternatives falling within the spirit and scope of the present application.
Claims (11)
1. An electrical distribution circuit, the circuit comprising:
a power distribution module;
the first power supply module is connected with the power distribution module so as to form a first power supply network together with the power distribution module;
the second power supply module is connected with the power distribution module so as to form a second power supply network together with the power distribution module;
the power distribution module comprises a plurality of load interfaces, each of which is connected to the first and/or second power supply network;
the first switch module is arranged between the load interface and a specified power supply network and used for controlling the connection or disconnection of a path between the load interface and the specified power supply network, and the specified power supply network is the first power supply network or the second power supply network.
2. The electrical distribution circuit of claim 1, wherein the plurality of load interfaces comprises a first load interface and a second load interface, the first load interface for connecting to a first load and the second load interface for connecting to a second load;
the first load interface is connected to both the first and second power supply networks;
the second load interface is connected to the first power supply network or the second power supply network.
3. The power distribution circuit of claim 2, wherein the first switch module comprises a first switch submodule, a second switch submodule;
the first switch submodule is arranged between the first load interface and the first power supply network and is used for controlling the connection or disconnection of a path between the first load interface and the first power supply network;
the second switch submodule is arranged between the first load interface and the second power supply network and is used for controlling the connection or disconnection of a path between the first load interface and the second power supply network.
4. The power distribution circuit according to claim 1, wherein a second switch module is disposed between the first power supply module and the power distribution module, and the second switch module is configured to control on/off of a path between the first power supply module and the power distribution module; and a third switch module is arranged between the second power supply module and the power distribution module and used for controlling the connection or disconnection of a passage between the second power supply module and the power distribution module.
5. The power distribution circuit according to claim 4, wherein the first power supply module comprises a first DC converter and a first storage battery, the first DC converter and the first storage battery being respectively connected to two ends of the power distribution module; the second switch module comprises a third switch submodule and a fourth switch submodule; the third switch submodule is arranged between the first direct current converter and the power distribution module, and the fourth switch submodule is arranged between the first storage battery and the power distribution module;
the second power supply module comprises a second direct current converter and a second storage battery, and the second direct current converter and the second storage battery are respectively connected to two ends of the power distribution module; the third switch module comprises a fifth switch submodule and a sixth switch submodule; the fifth switch submodule is arranged between the second direct-current converter and the power distribution module, and the sixth switch submodule is arranged between the second storage battery and the power distribution module.
6. The power distribution circuit of claim 4, further comprising a fourth switch module disposed between the second switch module and the third switch module, the fourth switch module configured to control the opening or closing of a path between the first supply network and the second supply network.
7. A method of power distribution, applied to a power distribution circuit as claimed in any one of claims 1 to 6, wherein at least one load interface is connected to a load, the method comprising:
acquiring a target current, wherein the target current is a current flowing through a target load;
generating a first control signal aiming at a specified switch module according to the target current, wherein the specified switch module is a first switch module arranged between a target load interface and a specified power supply network, the target load interface is connected with the target load, and the specified power supply network is a first power supply network or a second power supply network;
and controlling the first switch module to be closed or opened according to the first control signal.
8. The method of claim 7, wherein the target load interface is a first load interface, and wherein the designated switch module comprises a first switch submodule and a second switch submodule; the first control signal comprises a first opening signal and a first closing signal, or the first control signal comprises a second opening signal and a second closing signal;
the generating a first control signal for a first switching module according to the target current comprises:
under the condition that the first switch sub-module is closed and the second switch sub-module is opened, if the target current is greater than a current threshold, generating a first opening signal and a first closing signal, controlling the first switch sub-module to be opened according to the first opening signal, and controlling the second switch sub-module to be closed according to the first closing signal;
and under the condition that the first switch sub-module is opened and the second switch sub-module is closed, if the target current is greater than a current threshold, generating a second opening signal and a second closing signal, controlling the second switch sub-module to be opened according to the second opening signal, and controlling the first switch sub-module to be closed according to the second closing signal.
9. The method according to claim 7 or 8, characterized in that the method further comprises:
acquiring a first target voltage, wherein the first target voltage is the voltage of an output end of a first power supply module;
generating a second control signal for a second switch module according to the first target voltage;
controlling the second switch module to be opened or closed according to the second control signal;
and/or the presence of a gas in the gas,
acquiring a second target voltage, wherein the second target voltage is the voltage of the output end of the second power supply module;
generating a third control signal for a third switching module according to the second target voltage;
and controlling the third switch module to be opened or closed according to the third control signal.
10. The method of claim 9, further comprising:
generating a fourth control signal when the second switch module is controlled to be opened and the third switch module is closed, or when the third switch module is controlled to be opened and the second switch module is closed;
and controlling the fourth switch module to be switched from an open state to a closed state according to the fourth control signal.
11. An electrical consumer comprising a plurality of loads and the electrical distribution circuit of any of claims 1 to 6, wherein the plurality of loads interface with the plurality of loads.
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| CN202211104742.XA CN115459248B (en) | 2022-09-09 | 2022-09-09 | Power distribution circuit, power distribution method and electric equipment |
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