CN117335417B

CN117335417B - Load power supply control method, power supply controller, control assembly and charging pile

Info

Publication number: CN117335417B
Application number: CN202311599210.2A
Authority: CN
Inventors: 葛福胜; 郭修根; 蔡斯婷; 吴愁
Original assignee: Dongguan Aohai Technology Co ltd
Current assignee: Dongguan Aohai Technology Co ltd
Priority date: 2023-11-28
Filing date: 2023-11-28
Publication date: 2024-03-19
Anticipated expiration: 2043-11-28
Also published as: CN117335417A

Abstract

The invention discloses a load power supply control method, a power supply controller, a control assembly and a charging pile, which comprises the following steps: acquiring current power supply data corresponding to at least two first power supply modules; when the current power supply data meets the load power supply condition corresponding to the target load, determining the first power supply module as a second power supply module; when the number of the second power supply modules is one, determining the second power supply modules as target power supply modules, and supplying power to a target load by adopting the target power supply modules; and when the number of the second power supply modules is at least two, processing the at least two second power supply modules based on preset evaluation conditions, determining a target power supply module, and supplying power to a target load by adopting the target power supply module. According to the technical scheme, the plurality of first power supply modules are used as energy storage energy sources to supply power to the target load or supply power to the AC power grid in a grid-connected mode, so that the energy storage cost is reduced, the safety management of the plurality of first power supply modules is realized, and the safety of a household energy system is improved.

Description

Load power supply control method, power supply controller, control assembly and charging pile

Technical Field

The invention relates to the technical field of load power supply, in particular to a load power supply control method, a power supply controller, a control assembly and a charging pile.

Background

At present, in order to improve the energy utilization rate, an energy storage system is generally arranged in a household, the energy storage system is charged through an alternating current power grid in a low electricity consumption peak period, and power is supplied to household loads through the energy storage system in the event of rising electricity price or high electricity consumption peak.

However, the battery in the energy storage system accounts for 60% of the cost of the whole energy storage system, and meanwhile, the energy density requirement on the battery in the household energy storage system is relatively low, so that the service life of the battery is low, the size is large, the safety is relatively weak, and the user experience is affected. Therefore, how to reduce the cost of the energy storage system and improve the safety of the energy storage system is a technical problem to be solved at present.

Disclosure of Invention

The embodiment of the invention provides a load power supply control method, a power supply controller, a control assembly and a charging pile, which are used for solving the problems of high cost and poor safety of the existing household energy storage system.

A load power supply control method comprising:

acquiring current power supply data corresponding to at least two first power supply modules;

when the current power supply data meets the load power supply condition corresponding to the target load, determining the first power supply module as a second power supply module;

when the number of the second power supply modules is one, determining the second power supply modules as target power supply modules, and adopting the target power supply modules to supply power to the target load;

and when the number of the second power supply modules is at least two, processing the at least two second power supply modules based on preset evaluation conditions, determining a target power supply module, and adopting the target power supply module to supply power to the target load.

Further, the current power supply data includes a current power supply voltage; and determining the first power supply module as a second power supply module when the current power supply data meets the load power supply condition corresponding to the target load, including:

acquiring a voltage fluctuation value of the first power supply module in a first preset time according to the current power supply voltage corresponding to the first power supply module;

and if the voltage fluctuation value is not greater than a preset fluctuation value, judging that the current power supply data meets the load power supply condition corresponding to the target load, and determining the first power supply module as a second power supply module.

Further, the processing at least two second power supply modules based on the preset evaluation condition, and determining the target power supply module, includes:

acquiring power supply priorities corresponding to at least two second power supply modules;

and determining the second power supply module with the highest power supply priority as a target power supply module.

obtaining an actual measurement electric energy value of each second power supply module and a load electric energy value of a target load;

when the measured electric energy value is not smaller than the load electric energy value, determining the second power supply module as a third power supply module;

determining the third power supply module as a target power supply module when the number of the third power supply modules is one;

and when the number of the third power supply modules is at least two, determining the third power supply module with the highest power supply priority as the target power supply module.

Further, if the target load is an ac load, the target power supply module is an ac power grid, a solar module, or an electric vehicle;

and if the target load is an alternating current load and an electric automobile, the target power supply module is an alternating current power grid or a solar module.

Further, the ac load includes a first ac load and a second ac load;

the adopting the target power supply module to supply power to the target load comprises the following steps:

if the total electric energy value of the first alternating current load and the second alternating current load is not larger than a first preset electric energy, the target power supply module is adopted to supply power to the first alternating current load and the second alternating current load at the same time;

if the total electric energy value of the first alternating current load and the second alternating current load is larger than a first preset electric energy, adopting the target power supply module to supply any one of the first alternating current load and the second alternating current load with power;

and if the total electric energy value of the first alternating current load and the second alternating current load is larger than the second preset electric energy, controlling the target power supply module to stop supplying power to the first alternating current load and the second alternating current load.

A power supply controller for executing the load power supply control method.

A charging pile control assembly comprises an electric parameter acquisition module, a voltage conversion module, a switching circuit and the power supply controller;

the electric parameter acquisition module is connected with at least two first power supply modules and is used for acquiring current power supply data corresponding to the at least two first power supply modules;

the switching circuit is connected with at least two first power supply modules, the voltage conversion module and the target load and used for switching a power supply loop;

the voltage conversion module is used for connecting at least two first power supply modules and the target load and is used for voltage conversion between the at least two first power supply modules and the target load;

and the power supply controller is connected with the electric parameter acquisition module, the switching circuit and the voltage conversion module.

Further, the at least two first power supply modules comprise an alternating current power grid, a solar module and an electric automobile; the switching circuit comprises a first switch, a second switch, a third switch, a fourth switch and a fifth switch; the target load comprises a first alternating current load and a second alternating current load;

the first switch and the fourth switch Guan Chuanlian are between the ac power grid and the first ac load; the first switch and the fifth switch are connected in series between the alternating current power grid and the second alternating current load;

the first end of the second switch is connected with the solar module, and the second end of the second switch is connected with the first connecting end of the voltage conversion module;

the first end of the third switch is connected with the electric automobile, and the second end of the third switch is connected with the second connecting end of the voltage conversion module;

the third connecting end of the voltage conversion module is connected with a connecting node between the first switch and the fourth switch; the fourth connecting end of the voltage conversion module is connected with a connecting node between the first switch and the fifth switch;

the power supply controller is connected with the control ends of the first switch, the second switch, the third switch, the fourth switch and the fifth switch.

A charging pile comprises the charging pile control assembly.

According to the load power supply control method, the power supply controller, the control assembly and the charging pile, the power supply controller obtains current power supply data corresponding to at least two first power supply modules, when the current power supply data meet load power supply conditions corresponding to a target load, the first power supply modules are determined to be second power supply modules so as to judge whether the first power supply modules corresponding to the current power supply data can stably and reliably supply power to the target load, when the number of the second power supply modules is one, the second power supply modules are determined to be the target power supply modules, the target power supply modules are used for supplying power to the target load, when the number of the second power supply modules is at least two, the target power supply modules are used for supplying power to the target load based on preset evaluation conditions, the target power supply modules are used for supplying power to the target load, or grid-connected with the alternating current power grid, the energy storage cost is reduced, meanwhile, the safety management of the first power supply modules is achieved, and the safety of a household energy system is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a load power control method according to an embodiment of the invention;

FIG. 2 is another flow chart of a load power control method according to an embodiment of the invention;

FIG. 3 is another flow chart of a load power control method according to an embodiment of the invention;

FIG. 4 is another flow chart of a load power control method according to an embodiment of the invention;

FIG. 5 is another flow chart of a load power control method according to an embodiment of the invention;

FIG. 6 is a schematic diagram of a power supply controller according to an embodiment of the invention;

fig. 7 is a schematic diagram of a charging pile control assembly according to an embodiment of the invention.

In the figure: 1. an alternating current grid; 2. a solar module; 3. an electric automobile; 4. a charging pile control assembly; 41. an electrical parameter acquisition module; 42. a voltage conversion module; 43. a switching circuit; s431, a first switch; s432, a second switch; s433, a third switch; s434, a fourth switch; s435, a fifth switch; 44. a power supply controller; 5. an alternating current load; 51. a first ac load; 52. and a second ac load.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In the following description, for the purpose of providing a thorough understanding of the present invention, detailed structures and steps are presented in order to illustrate the technical solution presented by the present invention. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.

The embodiment provides a load power supply control method which is applied to a charging pile. Preferably, the charging pile is a V2G (Vehicle to Grid) charging pile. Specifically, the charging pile is applied to a household energy storage system. Optionally, the home energy storage system comprises at least two first power supply modules. Preferably, the at least two first power supply modules comprise an ac power grid 1, a solar module 2 and an electric vehicle 3. It is understood that the power battery in the electric vehicle 3 may be used as a power supply module for supplying power. The charging pile comprises a charging pile control assembly 4. Illustratively, as shown in fig. 7, the charging pile control assembly 4 includes an electrical parameter acquisition module 41, a voltage conversion module 42, a switching circuit 43, and a power supply controller 44; the electric parameter acquisition module 41 is connected with the at least two first power supply modules and is used for acquiring current power supply data corresponding to the at least two first power supply modules; a switching circuit 43 connected to at least two first power supply modules, the voltage conversion module 42 and the target load for switching the power supply loop; a voltage conversion module 42 for connecting the at least two first power supply modules and the target load, for voltage conversion between the at least two first power supply modules and the target load; and the power supply controller 44 is connected with the electric parameter acquisition module 41, the switching circuit 43 and the voltage conversion module 42. It will be appreciated that the power supply controller 44 is configured to perform the load power supply control method of the present implementation. In this embodiment, the V2G charging pile is disposed in the home energy storage system, and the solar module 2 of renewable energy and the power battery of the electric vehicle 3 are used as energy storage energy to supply power to the home load or supply power to the ac power grid 1 in a grid-connected manner, so as to reduce energy storage cost, and on the other hand, the V2G charging pile is used as an energy management center to perform safety management on the energy provided by the ac power grid 1, the solar module 2 and the electric vehicle 3, so that the safety of the home energy system is improved, and meanwhile, the electricity consumption cost is reduced.

The present embodiment provides a load power supply control method, which is applied to the power supply controller 44, as shown in fig. 1, and includes:

s101: and acquiring current power supply data corresponding to at least two first power supply modules.

S102: and when the current power supply data meets the load power supply condition corresponding to the target load, determining the first power supply module as the second power supply module.

S103: and when the number of the second power supply modules is one, determining the second power supply modules as target power supply modules, and adopting the target power supply modules to supply power to the target load.

S104: and when the number of the second power supply modules is at least two, processing the at least two second power supply modules based on preset evaluation conditions, determining a target power supply module, and supplying power to a target load by adopting the target power supply module.

The current power supply data refer to power supply data collected from each first power supply module. Illustratively, the present power supply data includes, but is not limited to, a power supply voltage, a power supply current, and a power supply power value. It is understood that the supply electrical energy value is the energy in joules produced by the action of the electrical potential. The second power supply module is a first power supply module which meets the load power supply condition. The load power supply condition is a condition set by user definition and is used for judging that the first power supply module can supply power stably and reliably. The target load may be an ac load 5 or an electric vehicle 3. The target power supply module refers to a first power supply module for supplying power to a target load. The preset evaluation condition refers to a condition for determining the target power supply module from at least two second power supply modules.

As an example, in step S101, the power supply controller 44 obtains current power supply data corresponding to at least two first power supply modules, so as to determine whether the first power supply modules can supply power to the target load stably and reliably according to the current power supply data, so as to ensure safety and reliability in the power supply process.

As an example, in step S102, when the current power supply data satisfies the load power supply condition corresponding to the target load, the first power supply module is determined as the second power supply module. In this embodiment, when the current power supply data meets the load power supply condition corresponding to the target load, it is determined that the first power supply module corresponding to the current power supply data can stably and reliably supply power to the target load, so that the first power supply module is determined to be the second power supply module.

As an example, in step S103, when the number of second power supply modules is one, the second power supply module is determined as the target power supply module, and the target power supply module is used to supply power to the target load. In this example, when only one second power supply module satisfies the load power supply condition, the second power supply module is directly determined as the target power supply module, and the target power supply module is adopted to supply power to the target load, so that stable and reliable power supply to the target load can be realized.

As an example, in step S104, when the number of the second power supply modules is at least two, the at least two second power supply modules are processed based on the preset evaluation condition, a target power supply module is determined, and the target power supply module is used to supply power to the target load. In this embodiment, when the plurality of second power supply modules all meet the load power supply condition, it is necessary to further evaluate whether the second power supply modules meet the preset evaluation condition, so as to determine the target power supply module from the plurality of second power supply modules. Optionally, the preset evaluation condition may be according to a preset power supply priority, or may be that the target power supply module is evaluated and determined according to the electric energy parameter of the second power supply module, so that the preset evaluation condition is ensured to be that the target power supply module can be reasonably determined from at least two second power supply modules, which is not limited herein.

In this embodiment, the power supply controller 44 obtains current power supply data corresponding to at least two first power supply modules, when the current power supply data meets a load power supply condition corresponding to a target load, determines the first power supply modules as second power supply modules to determine whether the first power supply modules corresponding to the current power supply data can stably and reliably supply power to the target load, determines the second power supply modules as target power supply modules when the number of the second power supply modules is one, uses the target power supply modules to supply power to the target load, and processes the at least two second power supply modules based on preset evaluation conditions when the number of the second power supply modules is at least two, determines the target power supply modules, uses the target power supply modules to supply power to the target load so as to realize that a plurality of first power supply modules are used as energy storage energy sources to supply power to the target load, or supply power to the ac power grid 1 in a grid-connected mode, so as to reduce energy storage cost, and simultaneously realize safety management on the plurality of first power supply modules and improve the safety of a household energy system.

In one embodiment, as shown in fig. 2, in step S102, the current supply data includes a current supply voltage; when the current power supply data meets the load power supply condition corresponding to the target load, determining the first power supply module as the second power supply module comprises the following steps:

s201: and acquiring a voltage fluctuation value of the first power supply module in a first preset time according to the current power supply voltage corresponding to the first power supply module.

S202: if the voltage fluctuation value is not larger than the preset fluctuation value, judging that the current power supply data meets the load power supply condition corresponding to the target load, and determining the first power supply module as the second power supply module.

The current supply voltage refers to a supply voltage of the first power supply module. The first preset time is a user-defined set time. The voltage fluctuation value refers to a variation value of the current supply voltage within a first preset time.

As an example, in step S201, the power supply controller 44 obtains a voltage fluctuation value of the first power supply module within a first preset time according to a current power supply voltage corresponding to the first power supply module, so as to determine whether the first power supply module can stably and reliably supply power to the target load according to the voltage fluctuation value of the first power supply module within the first preset time.

As an example, in step S202, if the voltage fluctuation value is not greater than the preset fluctuation value, the current power supply voltage corresponding to the first power supply module is relatively stable, and the current power supply data is determined to satisfy the load power supply condition corresponding to the target load, and the first power supply module is determined to be the second power supply module.

In this embodiment, the power supply controller 44 obtains the voltage fluctuation value of the first power supply module within the first preset time according to the current power supply voltage corresponding to the first power supply module, if the voltage fluctuation value is not greater than the preset fluctuation value, determines that the current power supply data meets the load power supply condition corresponding to the target load, and determines the first power supply module as the second power supply module, thereby determining the first power supply module capable of stably and reliably supplying power to the target load as the second power supply module, and ensuring the safety and reliability in the power supply process.

In an embodiment, as shown in fig. 3, in step S104, at least two second power supply modules are processed based on preset evaluation conditions, and a target power supply module is determined, including:

s301: and acquiring power supply priorities corresponding to the at least two second power supply modules.

S302: and determining the second power supply module with the highest power supply priority as the target power supply module.

The power supply priority is a priority of a power supply module which is set in a self-defining manner, and can be set according to actual experience or actual requirements, and is not limited herein.

As an example, in step S301, the user may configure the power supply priority according to actual experience or actual requirement, and store the power supply priority in a database, and the power supply controller 44 obtains the power supply priorities corresponding to at least two second power supply modules from the database. Preferably, the power supply priority is as follows from high to low: solar module 2, electric automobile 3, AC electric wire netting 1.

As an example, in step S302, the second power supply module with the highest power supply priority is determined as the target power supply module. The at least two second power supply modules may be any at least two of the solar module 2, the electric vehicle 3 and the ac power grid 1, and only the second power supply module with the highest power supply priority is required to be determined as the target power supply module.

In this embodiment, when the number of the second power supply modules is at least two, the power supply controller 44 obtains the power supply priorities corresponding to the at least two second power supply modules, determines the second power supply module with the highest power supply priority as the target power supply module, and determines the second power supply module that is relatively suitable as the target power supply module to supply power to the target load, so as to perform safety management on the energy provided by the at least two second power supply modules, and reduce the power consumption cost while improving the safety of the home energy system.

In an embodiment, as shown in fig. 4, in step S104, at least two second power supply modules are processed based on preset evaluation conditions, and a target power supply module is determined, including:

s401: and obtaining the measured electric energy value of each second power supply module and the load electric energy value of the target load.

S402: and when the measured electric energy value is not smaller than the load electric energy value, determining the second power supply module as a third power supply module.

S403: and determining the third power supply module as a target power supply module when the number of the third power supply modules is one.

S404: and when the number of the third power supply modules is at least two, determining the third power supply module with the highest power supply priority as the target power supply module.

The actually measured electric energy value refers to the electric energy value of the power supply of the second power supply module actually tested at the current moment. The load power value refers to the power supply power value required by the target load.

As an example, in step S401, the measured power value of each second power supply module and the load power value of the target load are obtained to determine whether the power supply capability of the second power supply module meets the power supply requirement of the target load.

As an example, in step S402, the second power supply module is determined as the third power supply module when the measured power value is not less than the load power value. In this embodiment, if the measured electrical energy value is smaller than or equal to the load electrical energy value of the target load, it is indicated that the second power supply module may not meet the power supply requirement of the target load, and if forced power supply may have a potential safety hazard, so that the second power supply module with the measured electrical energy value not smaller than the load electrical energy value is determined as the third power supply module, so as to ensure the safety in the power supply process.

As an example, in step S403, when the number of third power supply modules is one, the third power supply module is determined as the target power supply module. For example, when there is only one third power supply module, such as the solar module 2 or the electric vehicle 3, the solar module 2 or the electric vehicle 3 is directly determined as the third power supply module.

As an example, in step S404, when the number of third power supply modules is at least two, the third power supply module with the highest power supply priority is determined as the target power supply module. For example, when at least two third power supply modules, such as the solar module 2 and the electric vehicle 3, are used, the power supply priority is determined as the target power supply module from among the solar module 2 and the electric vehicle 3 according to the preset power supply priority.

It should be noted that, when the at least two second power supply modules include the ac power grid 1, the solar module 2 and the electric vehicle 3, for the ac power grid 1, it is only necessary to determine whether the ac power grid 1 is under the load power supply condition, and only determine whether the measured electric energy values of the solar module 2 and the electric vehicle 3 are not less than the load electric energy values, if the measured electric energy values of the solar module 2 and the electric vehicle 3 are not less than the load electric energy values, or if the measured electric energy value of any one of the solar module 2 and the electric vehicle 3 is not less than the load electric energy value, then according to the power supply priority, the power supply module is determined from the ac power grid 1, the solar module 2 and the electric vehicle 3. And if the measured electric energy values of the solar module 2 and the electric automobile 3 are larger than the load electric energy value, determining the alternating current power grid 1 as a target power supply module.

In this embodiment, the power supply controller 44 obtains the measured power value of each second power supply module and the load power value of the target load, determines the second power supply module as a third power supply module when the measured power value is not less than the load power value, determines the third power supply module as a target power supply module when the number of the third power supply modules is one, determines the third power supply module with the highest power supply priority as the target power supply module when the number of the third power supply modules is at least two, and further evaluates the safety of the second power supply module from the stable and reliable second power supply modules, thereby ensuring the safety of the target power supply modules in the power supply process.

In an embodiment, if the target load is the ac load 5, the target power supply module is the ac power grid 1, the solar module 2 or the electric vehicle 3; if the target load is an ac load 5 and/or an electric vehicle 3, the target power supply module is an ac power grid 1 or a solar module 2.

In this embodiment, when the target load is the ac load 5, the power supply controller 44 may select the target power supply module from the ac power grid 1, the solar module 2 or the electric vehicle 3 stably and reliably according to the load power supply condition and the preset evaluation condition, so as to utilize the ac power grid 1, the solar module 2 or the electric vehicle 3 as the energy storage energy source to supply power to the target load, or to grid-sell power to the ac power grid 1, thereby reducing the energy storage cost. If the target load is the electric automobile 3 and/or the alternating current load 5, the alternating current power grid 1 or the renewable energy solar module 2 is used as a target power supply module, so that the energy utilization rate is improved, and the electricity consumption cost is reduced.

In one embodiment, as shown in fig. 5, in step S103 and step S104, the ac load 5 includes a first ac load 51 and a second ac load 52; powering a target load with a target power module, comprising:

s501: and if the total electric energy value of the first alternating current load 51 and the second alternating current load 52 is not greater than the first preset electric energy, the target power supply module is adopted to supply power to the first alternating current load 51 and the second alternating current load 52 simultaneously.

S502: if the total power value of the first ac load 51 and the second ac load 52 is greater than the first preset power, the target power supply module is used to supply any one of the first ac load 51 and the second ac load 52 with power.

S503: if the total power value of the first ac load 51 and the second ac load 52 is greater than the second preset power, the control target power supply module stops supplying power to the first ac load 51 and the second ac load 52.

Wherein the first ac load 51 and the second ac load 52 are two different loads, and the importance or priority between the two loads can be determined by a user according to the requirement. The first preset electric energy and the second preset electric energy are all electric energy values set in a self-defining mode, and are used for judging whether the total electric energy value of the first alternating current load 51 and the second alternating current load 52 is too large. The first preset electrical energy is smaller than the second preset electrical energy. The first preset electric energy and the second preset electric energy are determined according to the actual load capacity of the solar module 2 or the electric vehicle 3. If the actual load capacity of the solar module 2 or the electric automobile 3 configured by the user is strong, the first preset electric energy and the second preset electric energy which are relatively large can be set, and if the actual load capacity of the solar module 2 or the electric automobile 3 configured by the user is weak, the first preset electric energy and the second preset electric energy which are relatively small can be set, so that the first preset electric energy is ensured to be smaller than the second preset electric energy, and the limitation is not carried out.

As an example, in step S501, if the total power value of the first ac load 51 and the second ac load 52 is not greater than the first preset power, and the power supply requirements of the first ac load 51 and the second ac load 52 are within the actual load capacity range of the solar module 2 or the electric vehicle 3, the target power supply module is used to supply power to the first ac load 51 and the second ac load 52 at the same time, so that safe power supply can be ensured.

As an example, in step S502, if the total power value of the first ac load 51 and the second ac load 52 is greater than the first preset power, and the power supply requirements of the first ac load 51 and the second ac load 52 are close to the maximum actual load capacity of the solar module 2 or the electric vehicle 3, the target power supply module is used to supply any one of the first ac load 51 and the second ac load 52 with power. One of the first ac load 51 and the second ac load 52 may be selected for power supply according to the priority or importance of the first ac load 51 and the second ac load 52 configured by the user. To ensure that important target loads can be powered preferentially.

As an example, in step S503, if the total power value of the first ac load 51 and the second ac load 52 is greater than the second preset power, and the power supply requirements of the first ac load 51 and the second ac load 52 exceed the actual load capacity range of the solar module 2 or the electric vehicle 3, the control target power supply module stops supplying power to the first ac load 51 and the second ac load 52, so as to prevent the overload from generating a potential safety hazard, and improve the safety in the power supply process. At this time, the power supply from the solar module 2 or the electric vehicle 3 may not meet the load power supply condition or the preset evaluation condition, and the power supply controller 44 switches the ac power grid 1 to supply power to the first ac load 51 and the second ac load 52.

In this embodiment, if the total power value of the first ac load 51 and the second ac load 52 is not greater than the first preset power, the target power supply module is adopted to supply power to the first ac load 51 and the second ac load 52 simultaneously; if the total electric energy value of the first alternating current load 51 and the second alternating current load 52 is larger than the first preset electric energy, a target power supply module is adopted to supply any one of the first alternating current load 51 and the second alternating current load 52 with power; if the total electric energy value of the first ac load 51 and the second ac load 52 is greater than the second preset electric energy, the target power supply module is controlled to stop supplying power to the first ac load 51 and the second ac load 52, so that power is supplied according to the actual load capacity of the target power supply module and the load demands of the first ac load 51 and the second ac load 52, and the safety in the power supply process is ensured.

The present embodiment provides a power supply controller 44 for the load power supply control method in the above-described embodiment.

In one embodiment, as shown in fig. 6, a power supply controller 44 is provided, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the load power supply control method in the above embodiment when executing the computer program, so that repetition is avoided, and details are not repeated here.

In an embodiment, a computer readable storage medium is provided, and a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the method for controlling load power supply in the above embodiment is implemented, so that repetition is avoided, and details are not repeated here.

Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.

The present embodiment provides a charging pile control assembly 4, as shown in fig. 7, including an electrical parameter acquisition module 41, a voltage conversion module 42, a switching circuit 43, and a power supply controller 44 in the above embodiment; the electric parameter acquisition module 41 is connected with the at least two first power supply modules and is used for acquiring current power supply data corresponding to the at least two first power supply modules; a switching circuit 43 connected to at least two first power supply modules, the voltage conversion module 42 and the target load for switching the power supply loop; a voltage conversion module 42 for connecting the at least two first power supply modules and the target load, for voltage conversion between the at least two first power supply modules and the target load; and the power supply controller 44 is connected with the electric parameter acquisition module 41, the switching circuit 43 and the voltage conversion module 42.

The voltage conversion module 42 is a bidirectional AC/DC conversion module. The electrical parameter collecting module 41 may be an existing collecting module, which is only required to ensure that it can collect current power supply data corresponding to at least two first power supply modules, and is not limited herein.

In this embodiment, the power supply controller 44 executes the load power supply control method, and obtains current power supply data corresponding to at least two first power supply modules by using the electrical parameter acquisition module 41, and determines the first power supply module as the second power supply module when the current power supply data meets the load power supply condition corresponding to the target load; when the number of the second power supply modules is one, the second power supply modules are determined to be target power supply modules, when the number of the second power supply modules is at least two, the at least two second power supply modules are processed based on preset evaluation conditions, the target power supply modules are determined, meanwhile, the switching circuit 43 is controlled to switch on a power supply loop corresponding to the target power supply modules, and the voltage conversion module 42 is controlled to conduct voltage conversion so as to supply power to a target load by adopting the target power supply modules, so that the first power supply modules are used as energy storage energy sources to supply power to the target load, or grid-connected electricity selling to the alternating current power grid 1 is realized, the energy storage cost is reduced, the safety management of the first power supply modules is realized, and the safety of a household energy system is improved.

In an embodiment, the at least two first power supply modules include an ac power grid 1, a solar module 2 and an electric vehicle 3; the switching circuit 43 includes a first switch S431, a second switch S432, a third switch S433, a fourth switch S434, and a fifth switch S435; the target load includes a first ac load 51 and a second ac load 52; the first switch S431 and the fourth switch S434 are connected in series between the ac power grid 1 and the first ac load 51; the first switch S431 and the fifth switch S435 are connected in series between the ac power grid 1 and the second ac load 52; a first end of the second switch S432 is connected to the solar module 2, and a second end of the second switch S432 is connected to the first connection end of the voltage conversion module 42; the first end of the third switch S433 is connected with the electric automobile 3, and the second end of the third switch S433 is connected with the second connecting end of the voltage conversion module 42; the third connection end of the voltage conversion module 42 is connected with a connection node between the first switch S431 and the fourth switch S434; a fourth connection terminal of the voltage conversion module 42 is connected to a connection node between the first switch S431 and the fifth switch S435; the power supply controller 44 is connected to the control terminals of the first switch S431, the second switch S432, the third switch S433, the fourth switch S434 and the fifth switch S435.

In the present embodiment, when the ac power grid 1 is determined as the target power supply module, the power supply controller 44 controls the first switch S431, the fourth switch S434, or the fifth switch S435 to be turned on to supply power to the first ac load 51 and the second ac load 52 or the electric vehicle 3, or controls the voltage conversion module 42 to convert the ac signal provided by the ac power grid 1 into the dc signal to charge the electric vehicle 3. When the solar module 2 is the target power supply module, the power supply controller 44 controls the second switch S432 to be turned on, and controls the voltage conversion module 42 to convert the dc signal provided by the solar module 2 into an ac signal to supply power to the first ac load 51 and the second ac load 52 or charge the electric vehicle 3. When the electric vehicle 3 is the target power supply module, the power supply controller 44 controls the third switch S433 to be turned on, and controls the voltage conversion module 42 to convert the dc signal provided by the electric vehicle 3 into an ac signal to supply power to the first ac load 51 and the second ac load 52. It can be understood that, the power supply controller 44 controls the fourth switch S434 and the fifth switch S435 to operate according to the measured power values of the solar module 2 and the electric vehicle 3 and the load power values of the first ac load 51 and the second ac load 52, and according to steps S501-S503 in the above embodiment, so as to avoid repetition, which is not described herein.

The present embodiment provides a charging pile, including the charging pile control assembly 4 described above.

The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.

Claims

1. A load power supply control method, characterized by comprising:

acquiring current power supply data corresponding to at least two first power supply modules; the at least two first power supply modules comprise an alternating current power grid, a solar module and an electric automobile;

when the number of the second power supply modules is at least two, processing the at least two second power supply modules based on a preset evaluation condition, determining a target power supply module, and adopting the target power supply module to supply power to the target load;

the processing of at least two second power supply modules based on the preset evaluation conditions, and determining a target power supply module, includes:

2. The load power supply control method of claim 1, wherein the present power supply data comprises a present power supply voltage; and determining the first power supply module as a second power supply module when the current power supply data meets the load power supply condition corresponding to the target load, including:

3. The load power supply control method according to claim 1, wherein the processing at least two of the second power supply modules based on a preset evaluation condition, determining a target power supply module, includes:

4. A load power supply control method according to any one of claims 1 to 3, wherein if the target load is an ac load, the target power supply module is an ac power grid, a solar module, or an electric vehicle;

5. The load power supply control method of claim 4, wherein the ac load comprises a first ac load and a second ac load;

6. A power supply controller for performing the load power supply control method according to any one of claims 1 to 5.

7. A charging pile control assembly, comprising an electrical parameter acquisition module, a voltage conversion module, a switching circuit and the power supply controller of claim 6;

8. The charging pile control assembly of claim 7, wherein the at least two first power supply modules include an ac power grid, a solar module, and an electric vehicle; the switching circuit comprises a first switch, a second switch, a third switch, a fourth switch and a fifth switch; the target load comprises a first alternating current load and a second alternating current load;

9. A charging pile comprising a charging pile control assembly according to claim 7 or 8.