CN114744329B - Grid control method, device and equipment for direct-current power supply system and direct-current power supply system - Google Patents

Grid control method, device and equipment for direct-current power supply system and direct-current power supply system Download PDF

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CN114744329B
CN114744329B CN202210355057.8A CN202210355057A CN114744329B CN 114744329 B CN114744329 B CN 114744329B CN 202210355057 A CN202210355057 A CN 202210355057A CN 114744329 B CN114744329 B CN 114744329B
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closing degree
opening
grid
determining
battery
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CN114744329A (en
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于德斌
刘人恺
王伟
廖立平
常小波
江彬
明亮
杨豪
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Chongqing Bojin Technology Co ltd
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Chongqing Bojin Technology Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/635—Control systems based on ambient temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a grid control method, a device and equipment of a direct current power supply system and the direct current power supply system, comprising the following steps: determining the current temperature requirement of the storage battery according to the battery temperature information of the storage battery, and determining the current heat dissipation requirement of the rectifying module according to the state information of the rectifying module; determining a first grid demand opening and closing degree of a battery heat dissipation air outlet grid and a second grid target opening and closing degree of a channel grid from a rectifying module to a storage battery pack according to temperature demands; determining the third grid demand opening and closing degree of the air outlet grid of the rectifying module according to the second grid target opening and closing degree and the state information; determining opening and closing degree weight according to the ambient temperature and the wind speed; determining a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first grid demand opening and closing degree and the opening and closing degree weight, and determining a third grid target opening and closing degree of the rectifier module air outlet grid according to the third grid demand opening and closing degree and the opening and closing degree weight; and controlling the opening and closing degree of the corresponding grids according to the opening and closing degree of each grid target.

Description

Grid control method, device and equipment for direct-current power supply system and direct-current power supply system
Technical Field
The disclosure relates to the technical field of power supply, in particular to a grid control method, a grid control device, grid control equipment and a direct-current power supply system.
Background
The direct-current power supply system is a device for converting input three-phase alternating current into direct current to charge the storage battery, and can also provide power for a switching-on bus load and can also provide power for a control bus through the switching-on bus.
When the rectification module of the direct current power supply system works, a large amount of heat is generated, when the heat is accumulated in a large amount, the internal temperature of the direct current power supply system is increased, the working efficiency of the direct current power supply system is reduced, and when the temperature of the storage battery pack is lower, the charge and discharge capacity of the storage battery pack is reduced, and the capacity is greatly reduced.
Disclosure of Invention
The disclosure aims to provide a grid control method, a grid control device, grid control equipment and a direct current power supply system, so as to solve the problems that in the related art, the work efficiency of the direct current power supply system is reduced due to heat generated when a rectifying module works, and the capacity of a storage battery pack is reduced when the temperature is low.
To achieve the above object, a first aspect of the embodiments of the present disclosure provides a grid control method for a dc power supply system, including:
determining the current temperature requirement of a storage battery pack of the direct-current power supply system according to the acquired battery temperature information of the storage battery pack, and determining the current heat dissipation requirement of a rectifying module of the direct-current power supply system according to the acquired state information of the rectifying module;
determining a first grid demand opening and closing degree of the battery heat dissipation air outlet grid and a second grid target opening and closing degree of a channel grid from the rectifying module to the storage battery pack according to the temperature demand;
determining a third grid demand opening and closing degree of the air outlet grid of the rectifying module according to the second grid target opening and closing degree and the state information;
determining the weight of the opening degree and the closing degree according to the ambient temperature and the wind speed of the environment where the direct current power supply system is positioned;
determining a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first grid required opening and closing degree and the opening and closing degree weight, and determining a third grid target opening and closing degree of the rectifier module air outlet grid according to the third grid required opening and closing degree and the opening and closing degree weight;
the opening and closing degree of the battery heat dissipation air outlet grating is controlled according to the first grating target opening and closing degree, the opening and closing degree of the channel grating is controlled according to the second grating target opening and closing degree, and the opening and closing degree of the rectifying module air outlet grating is controlled according to the third grating target opening and closing degree.
In one embodiment, the method further comprises:
determining a first rotating speed of the battery cooling fan and a second rotating speed of the direct current module cooling fan according to the ambient temperature and the wind speed; and is combined with the other components of the water treatment device,
controlling the working state of the battery cooling fan according to the first rotating speed and the working state of the direct current module cooling fan according to the second rotating speed;
the determining the first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first grid demand opening and closing degree and the opening and closing degree weight, and determining the third grid target opening and closing degree of the rectification module air outlet grid according to the third grid demand opening and closing degree and the opening and closing degree weight includes:
and determining a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first rotating speed, the first grid required opening and closing degree and the opening and closing degree weight, and determining a third grid target opening and closing degree of the rectification module air outlet grid according to the second rotating speed, the third grid required opening and closing degree and the opening and closing degree weight.
In one embodiment, the method further comprises:
determining a third rotating speed of a channel fan arranged at the channel grating according to the second grating target opening and closing degree;
and controlling the working state of the channel fan according to the third rotating speed.
In one embodiment, the method further comprises:
synchronously acquiring battery temperature information of the storage battery pack and state information of the rectifying module according to time interval duration;
the determining, according to the obtained battery temperature information of the battery pack of the dc power supply system, the current temperature requirement of the battery pack, and the obtained state information of the rectifying module of the dc power supply system, the current heat dissipation requirement of the rectifying module, includes:
calculating the battery temperature change rate of adjacent battery temperatures in the battery temperature information and the state change rate of adjacent state information in the state information;
constructing a battery temperature coordinate system according to each battery temperature in the battery temperature information and the battery temperature change rate, and constructing a direct current module state coordinate system according to each state in the state information and the state change rate;
determining a target battery heat dissipation requirement corresponding to each battery temperature in the battery temperature coordinate system based on the battery temperature information and the battery temperature change rate, and determining a target direct current module heat dissipation requirement corresponding to each state information in the direct current module state coordinate system based on the state information and the state change rate;
based on interpolation, determining the current temperature requirement of the storage battery pack according to the target battery heat dissipation requirement, and determining the current heat dissipation requirement of the rectifying module according to the target direct current module heat dissipation requirement.
In one embodiment, the time interval duration is determined by:
determining the maximum battery temperature change rate in the battery temperature change rates of the preset times which are the latest from the last acquisition, and determining the average state change rate of the state change rates of the preset times which are the latest from the last acquisition;
determining a state information weight according to the average state change rate, and determining a battery temperature weight according to the state information weight;
and determining the time interval duration according to the state information weight, the battery temperature weight, the maximum battery temperature change rate and the average state change rate.
In one embodiment, the determining the opening and closing degree weight according to the ambient temperature and the wind speed of the environment where the dc power supply system is located includes:
determining a temperature factor according to a temperature difference value between the ambient temperature of the environment where the direct current power supply system is located and a preset temperature threshold value, and determining a wind speed factor according to a wind speed difference value between the wind speed of the environment where the direct current power supply system is located and a preset wind speed threshold value;
and determining the opening and closing degree weight according to the ambient temperature, the wind speed, the temperature factor and the wind speed factor based on a preset weight calculation formula.
In one embodiment, the weight calculation formula wi is:
Figure DEST_PATH_IMAGE002
wherein u is f Is the kinematic viscosity coefficient of air, z vi For the wind speed factor, v i For the wind speed, z Ti T is the temperature factor i And alpha is the angle between the wind direction and the air outlet grille for the ambient temperature.
In a second aspect of the embodiments of the present disclosure, there is provided a grid control device for a dc power supply system, including:
the first determining module is configured to determine the current temperature requirement of the storage battery pack according to the acquired battery temperature information of the storage battery pack of the direct-current power supply system, and determine the current heat dissipation requirement of the rectifying module according to the acquired state information of the rectifying module of the direct-current power supply system;
the second determining module is configured to determine a first grid demand opening and closing degree of the battery heat dissipation air outlet grid and a second grid target opening and closing degree of the channel grid from the rectifying module to the storage battery pack according to the temperature demand;
the third determining module is configured to determine a third grid demand opening and closing degree of the air outlet grid of the rectifying module according to the second grid target opening and closing degree and the state information;
the fourth determining module is configured to determine the opening and closing degree weight according to the ambient temperature and the wind speed of the environment where the direct-current power supply system is located;
a fifth determining module configured to determine a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first grid required opening and closing degree and the opening and closing degree weight, and determine a third grid target opening and closing degree of the rectifying module air outlet grid according to the third grid required opening and closing degree and the opening and closing degree weight;
the control module is configured to control the opening and closing degree of the battery heat dissipation air outlet grating according to the first grating target opening and closing degree, control the opening and closing degree of the channel grating according to the second grating target opening and closing degree and control the opening and closing degree of the rectifying module air outlet grating according to the third grating target opening and closing degree.
In one embodiment, the fifth determining module is configured to:
determining a first rotating speed of the battery cooling fan and a second rotating speed of the direct current module cooling fan according to the ambient temperature and the wind speed;
determining a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first rotating speed, the first grid required opening and closing degree and the opening and closing degree weight, and determining a third grid target opening and closing degree of the rectification module air outlet grid according to the second rotating speed, the third grid required opening and closing degree and the opening and closing degree weight;
the control module is further configured to control the working state of the battery cooling fan according to the first rotating speed and the working state of the direct current module cooling fan according to the second rotating speed.
In one embodiment, the fifth determining module is further configured to:
determining a third rotating speed of a channel fan arranged at the channel grating according to the second grating target opening and closing degree;
and controlling the working state of the channel fan according to the third rotating speed.
In one embodiment, the first determining module is configured to:
synchronously acquiring battery temperature information of the storage battery pack and state information of the rectifying module according to time interval duration;
calculating the battery temperature change rate of adjacent battery temperatures in the battery temperature information and the state change rate of adjacent state information in the state information;
constructing a battery temperature coordinate system according to each battery temperature in the battery temperature information and the battery temperature change rate, and constructing a direct current module state coordinate system according to each state in the state information and the state change rate;
determining a target battery heat dissipation requirement corresponding to each battery temperature in the battery temperature coordinate system based on the battery temperature information and the battery temperature change rate, and determining a target direct current module heat dissipation requirement corresponding to each state information in the direct current module state coordinate system based on the state information and the state change rate;
based on interpolation, determining the current temperature requirement of the storage battery pack according to the target battery heat dissipation requirement, and determining the current heat dissipation requirement of the rectifying module according to the target direct current module heat dissipation requirement.
In one embodiment, the first determining module is configured to determine the time interval duration by:
determining the maximum battery temperature change rate in the battery temperature change rates of the preset times which are the latest from the last acquisition, and determining the average state change rate of the state change rates of the preset times which are the latest from the last acquisition;
determining a state information weight according to the average state change rate, and determining a battery temperature weight according to the state information weight;
and determining the time interval duration according to the state information weight, the battery temperature weight, the maximum battery temperature change rate and the average state change rate.
In one embodiment, the fourth determining module is configured to:
determining a temperature factor according to a temperature difference value between the ambient temperature of the environment where the direct current power supply system is located and a preset temperature threshold value, and determining a wind speed factor according to a wind speed difference value between the wind speed of the environment where the direct current power supply system is located and a preset wind speed threshold value;
and determining the opening and closing degree weight according to the ambient temperature, the wind speed, the temperature factor and the wind speed factor based on a preset weight calculation formula.
In one embodiment, the weight calculation formula wi is:
Figure DEST_PATH_IMAGE002A
wherein, u is f Is the kinematic viscosity coefficient of air, z vi For the wind speed factor, v i For the wind speed, z Ti T is the temperature factor i And alpha is the angle between the wind direction and the air outlet grille for the ambient temperature.
In a third aspect of the disclosed embodiments, there is provided an electronic device, including:
a memory for storing program code implementing the method of any one of the first aspects;
and the processor is used for executing the program codes in the memory so as to control the opening and closing degrees of the battery heat dissipation air outlet grating, the channel grating and the rectifying module air outlet grating.
A fourth aspect of an embodiment of the present disclosure provides a dc power supply system, including the electronic device of the third aspect.
Through the technical scheme, at least the following technical effects can be achieved:
determining the current temperature requirement of the storage battery pack according to the battery temperature information of the storage battery pack, and determining the current heat dissipation requirement of the rectifying module according to the state information of the rectifying module; determining a first grid demand opening and closing degree of a battery heat dissipation air outlet grid and a second grid target opening and closing degree of a channel grid from a rectifying module to a storage battery pack according to temperature demands; determining the third grid demand opening and closing degree of the air outlet grid of the rectifying module according to the second grid target opening and closing degree and the state information; determining opening and closing degree weight according to the ambient temperature and the wind speed; determining a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first grid demand opening and closing degree and the opening and closing degree weight, and determining a third grid target opening and closing degree of the rectifier module air outlet grid according to the third grid demand opening and closing degree and the opening and closing degree weight; and controlling the opening and closing degree of the corresponding grids according to the opening and closing degree of each grid target. Can be under the condition that storage battery needs to heat, through rectifier module to storage battery's passageway grid with rectifier module's heat transmission to storage battery, with heating to storage battery, under the condition that storage battery does not need to heat, can dispel the heat to rectifier module and storage battery through the grid degree of opening and shutting of control rectifier module air outlet and the grid degree of opening and shutting of battery air outlet, so can not advance the heat that can make full use of rectifier module produce, can also guarantee rectifier module's work efficiency and storage battery's charge-discharge capacity reduction.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
fig. 1 is a flowchart illustrating a grid control method of a dc power supply system according to an example.
Fig. 2 is a block diagram of a grid control device of a dc power supply system according to an example.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
In view of the above, the embodiment of the invention provides a grid control method, a device, equipment and a dc power system of the present disclosure, which first introduces a structure of the dc power system of the present disclosure, where the dc power system includes a cabinet body and a top plate, a telescopic pull rod is provided at the back of the cabinet body, a fixed support and a roller are provided at the bottom of the cabinet body, a fan is provided at one side of the cabinet body, a heat dissipation port is provided at the other side of the cabinet body, and the top cover of the cabinet body can be integrally uncovered. The cabinet body is divided into a battery area, a module area, a measurement and control interface area and an input and output interface area. A heat conduction fan and an air duct are arranged between the module area and the battery area, and the battery area is provided with a heat insulation material. The inside includes main circuit and secondary control circuit, and the input of exchanging the return circuit links to each other with the U looks, V looks, the W looks of outside three-phase electricity, and the output of exchanging the return circuit links to each other with the rectification return circuit, and the rectification return circuit links to each other with the battery return circuit, has direct current output and exchanges output interface. The secondary loop connects each part of the main loop with the monitoring host computer and is responsible for measurement and control.
Fig. 1 is a flowchart illustrating a grid control method of a dc power supply system according to an example, as shown in fig. 1, the method including the steps of:
in step S11, according to the obtained battery temperature information of the storage battery of the dc power supply system, a current temperature requirement of the storage battery is determined, and according to the obtained state information of the rectifying module of the dc power supply system, a current heat dissipation requirement of the rectifying module is determined.
In the embodiment of the disclosure, battery temperature information of a storage battery pack of a direct-current power supply system is acquired through a temperature sensor arranged in the storage battery pack.
In an embodiment of the disclosure, the state information of the rectifying module includes at least one of rectifying module temperature information, rectifying module output direct current information, and rectifying module power information. Optionally, the temperature information of the rectifying module is obtained through a temperature sensor arranged in the installing cavity of the rectifying module, the direct current information is obtained through a current sensor arranged on the rectifying circuit, and the power information of the rectifying module is determined according to the direct current information.
In one embodiment, the method further comprises:
and synchronously acquiring the battery temperature information of the storage battery pack and the state information of the rectifying module according to the time interval duration.
In one embodiment, the time interval duration is determined by:
the maximum battery temperature change rate among the battery temperature change rates of the preset times closest to the last acquisition is determined, and the average state change rate of the state change rates of the preset times closest to the last acquisition is determined.
And determining a state information weight according to the average state change rate, and determining a battery temperature weight according to the state information weight.
The state information weight is determined according to the change rate interval in which the average state change rate is located, and each change rate interval is preset with a corresponding state information weight.
Wherein the battery temperature weight is obtained by subtracting the state information weight from 1.
And determining the time interval duration according to the state information weight, the battery temperature weight, the maximum battery temperature change rate and the average state change rate.
And taking the sum of the product of the state information weight and the average state change rate and the product of the battery temperature weight and the maximum battery temperature change rate as the time interval duration.
The determining, according to the obtained battery temperature information of the battery pack of the dc power supply system, the current temperature requirement of the battery pack, and the obtained state information of the rectifying module of the dc power supply system, the current heat dissipation requirement of the rectifying module, includes:
calculating the battery temperature change rate of adjacent battery temperatures in the battery temperature information and the state change rate of adjacent state information in the state information;
and constructing a battery temperature coordinate system according to each battery temperature in the battery temperature information and the battery temperature change rate, and constructing a direct current module state coordinate system according to each state in the state information and the state change rate.
And constructing a state coordinate system of the direct current module by taking each state in the state information as an abscissa and taking the state change rate as an ordinate.
Determining a target battery heat dissipation requirement corresponding to each battery temperature in the battery temperature coordinate system based on the battery temperature information and the battery temperature change rate, and determining a target direct current module heat dissipation requirement corresponding to each state information in the direct current module state coordinate system based on the state information and the state change rate;
based on interpolation, determining the current temperature requirement of the storage battery pack according to the target battery heat dissipation requirement, and determining the current heat dissipation requirement of the rectifying module according to the target direct current module heat dissipation requirement.
In step S12, a first grid demand opening and closing degree of the battery heat dissipation air outlet grid and a second grid target opening and closing degree of the channel grid from the rectifying module to the storage battery pack are determined according to the temperature demand.
In step S13, a third grid demand opening and closing degree of the air outlet grid of the rectifying module is determined according to the second grid target opening and closing degree and the state information.
In step S14, the opening and closing degree weight is determined according to the ambient temperature and the wind speed of the environment where the dc power supply system is located.
In one embodiment, the determining the opening and closing degree weight according to the ambient temperature and the wind speed of the environment where the dc power supply system is located includes:
determining a temperature factor according to a temperature difference value between the ambient temperature of the environment where the direct current power supply system is located and a preset temperature threshold value, and determining a wind speed factor according to a wind speed difference value between the wind speed of the environment where the direct current power supply system is located and a preset wind speed threshold value;
and determining the opening and closing degree weight according to the ambient temperature, the wind speed, the temperature factor and the wind speed factor based on a preset weight calculation formula.
The opening and closing degree weight is determined according to a preset weight calculation formula and according to the product of the kinematic viscosity coefficient of air, the wind speed and the wind speed factor, the product of the ambient temperature and the temperature factor, and the angle between the wind direction and the air outlet grid.
The angle between the wind direction and the air outlet grille can be an average value of a first angle between the wind direction and the battery heat dissipation air outlet grille and a second angle between the wind direction and the rectification module air outlet grille.
In one embodiment, the weight calculation formula wi is:
Figure DEST_PATH_IMAGE002AA
wherein, u is f Is the kinematic viscosity coefficient of air, z vi For the wind speed factor, v i For the wind speed, z Ti T is the temperature factor i And alpha is the angle between the wind direction and the air outlet grille for the ambient temperature.
In step S15, a first grid target opening and closing degree of the battery cooling air outlet grid is determined according to the first grid required opening and closing degree and the opening and closing degree weight, and a third grid target opening and closing degree of the rectifying module air outlet grid is determined according to the third grid required opening and closing degree and the opening and closing degree weight.
In step S16, the opening and closing degree of the battery heat dissipation air outlet grille is controlled according to the first grille target opening and closing degree, the opening and closing degree of the channel grille is controlled according to the second grille target opening and closing degree, and the opening and closing degree of the rectifying module air outlet grille is controlled according to the third grille target opening and closing degree.
According to the technical scheme, under the condition that the storage battery pack needs to be heated, the heat of the rectifying module is transmitted to the storage battery pack through the channel grating from the rectifying module to the storage battery pack so as to heat the storage battery pack, under the condition that the storage battery pack does not need to be heated, the heat dissipation can be carried out on the rectifying module and the storage battery pack by controlling the grating opening and closing degree of the air outlet of the rectifying module and the grating opening and closing degree of the air outlet of the battery pack, so that the heat generated by the rectifying module can be fully utilized, and the working efficiency of the rectifying module and the charge and discharge capacity of the storage battery pack can be further guaranteed.
In one embodiment, the method further comprises:
determining a first rotating speed of the battery cooling fan and a second rotating speed of the direct current module cooling fan according to the ambient temperature and the wind speed; and is combined with the other components of the water treatment device,
controlling the working state of the battery cooling fan according to the first rotating speed and the working state of the direct current module cooling fan according to the second rotating speed;
the determining the first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first grid demand opening and closing degree and the opening and closing degree weight, and determining the third grid target opening and closing degree of the rectification module air outlet grid according to the third grid demand opening and closing degree and the opening and closing degree weight includes:
and determining a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first rotating speed, the first grid required opening and closing degree and the opening and closing degree weight, and determining a third grid target opening and closing degree of the rectification module air outlet grid according to the second rotating speed, the third grid required opening and closing degree and the opening and closing degree weight.
In one embodiment, the method further comprises:
determining a third rotating speed of a channel fan arranged at the channel grating according to the second grating target opening and closing degree;
and controlling the working state of the channel fan according to the third rotating speed.
When the channel grating is in a closed state, the working state of the channel fan is closed, and when the channel grating is in an open state, the working state of the channel fan is open, and the rotating speed of the channel fan is increased along with the increase of the opening and closing degree of the channel grating.
Based on the same inventive concept, the embodiment of the present disclosure further provides a dc power supply system grid control device, and fig. 2 is a block diagram of the dc power supply system grid control device according to an example, as shown in fig. 2, the device 200 includes: the first determination module 210, the second determination module 220, the third determination module 230, the fourth determination module 240, the fifth determination module 250, and the control module 260.
A first determining module 210 configured to determine, according to the obtained battery temperature information of the battery pack of the dc power supply system, a current temperature requirement of the battery pack, and according to the obtained state information of the rectifying module of the dc power supply system, a current heat dissipation requirement of the rectifying module;
a second determining module 220 configured to determine a first grid demand opening and closing degree of the battery heat dissipation air outlet grid and a second grid target opening and closing degree of the channel grid from the rectifying module to the storage battery pack according to the temperature demand;
a third determining module 230 configured to determine a third grid demand opening and closing degree of the air outlet grid of the rectifying module according to the second grid target opening and closing degree and the state information;
a fourth determining module 240, configured to determine the opening and closing degree weight according to the ambient temperature and the wind speed of the environment where the dc power supply system is located;
a fifth determining module 250 configured to determine a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first grid demand opening and closing degree and the opening and closing degree weight, and determine a third grid target opening and closing degree of the rectifying module air outlet grid according to the third grid demand opening and closing degree and the opening and closing degree weight;
the control module 260 is configured to control the opening and closing degree of the battery heat dissipation air outlet grille according to the first grille target opening and closing degree, control the opening and closing degree of the channel grille according to the second grille target opening and closing degree, and control the opening and closing degree of the rectifying module air outlet grille according to the third grille target opening and closing degree.
In one embodiment, the fifth determining module 250 is configured to:
determining a first rotating speed of the battery cooling fan and a second rotating speed of the direct current module cooling fan according to the ambient temperature and the wind speed;
determining a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first rotating speed, the first grid required opening and closing degree and the opening and closing degree weight, and determining a third grid target opening and closing degree of the rectification module air outlet grid according to the second rotating speed, the third grid required opening and closing degree and the opening and closing degree weight;
the control module 260 is further configured to control the operating state of the battery cooling fan according to the first rotation speed and the operating state of the dc module cooling fan according to the second rotation speed.
In one embodiment, the fifth determining module 250 is further configured to:
determining a third rotating speed of a channel fan arranged at the channel grating according to the second grating target opening and closing degree;
and controlling the working state of the channel fan according to the third rotating speed.
In one embodiment, the first determining module 210 is configured to:
synchronously acquiring battery temperature information of the storage battery pack and state information of the rectifying module according to time interval duration;
calculating the battery temperature change rate of adjacent battery temperatures in the battery temperature information and the state change rate of adjacent state information in the state information;
constructing a battery temperature coordinate system according to each battery temperature in the battery temperature information and the battery temperature change rate, and constructing a direct current module state coordinate system according to each state in the state information and the state change rate;
determining a target battery heat dissipation requirement corresponding to each battery temperature in the battery temperature coordinate system based on the battery temperature information and the battery temperature change rate, and determining a target direct current module heat dissipation requirement corresponding to each state information in the direct current module state coordinate system based on the state information and the state change rate;
based on interpolation, determining the current temperature requirement of the storage battery pack according to the target battery heat dissipation requirement, and determining the current heat dissipation requirement of the rectifying module according to the target direct current module heat dissipation requirement.
In one embodiment, the first determining module 210 is configured to determine the time interval duration by:
determining the maximum battery temperature change rate in the battery temperature change rates of the preset times which are the latest from the last acquisition, and determining the average state change rate of the state change rates of the preset times which are the latest from the last acquisition;
determining a state information weight according to the average state change rate, and determining a battery temperature weight according to the state information weight;
and determining the time interval duration according to the state information weight, the battery temperature weight, the maximum battery temperature change rate and the average state change rate.
In one embodiment, the fourth determining module 240 is configured to:
determining a temperature factor according to a temperature difference value between the ambient temperature of the environment where the direct current power supply system is located and a preset temperature threshold value, and determining a wind speed factor according to a wind speed difference value between the wind speed of the environment where the direct current power supply system is located and a preset wind speed threshold value;
and determining the opening and closing degree weight according to the ambient temperature, the wind speed, the temperature factor and the wind speed factor based on a preset weight calculation formula.
In one embodiment, the weight calculation formula wi is:
Figure DEST_PATH_IMAGE002AAA
wherein, u is f Is the kinematic viscosity coefficient of air, z vi For the wind speed factor, v i For the wind speed, z Ti T is the temperature factor i And alpha is the angle between the wind direction and the air outlet grille for the ambient temperature.
The embodiment of the disclosure also provides an electronic device, including:
a memory for storing program code for implementing the method of any one of the preceding claims;
and the processor is used for executing the program codes in the memory so as to control the opening and closing degrees of the battery heat dissipation air outlet grating, the channel grating and the rectifying module air outlet grating.
The embodiment of the disclosure also provides a direct-current power supply system, which comprises the electronic equipment.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (10)

1. A grid control method for a dc power supply system, comprising:
determining the current temperature requirement of a storage battery pack of the direct-current power supply system according to the acquired battery temperature information of the storage battery pack, and determining the current heat dissipation requirement of a rectifying module of the direct-current power supply system according to the acquired state information of the rectifying module;
determining a first grid demand opening and closing degree of a battery heat dissipation air outlet grid and a second grid target opening and closing degree of a channel grid from the rectifying module to the storage battery pack according to the temperature demand;
determining a third grid demand opening and closing degree of the air outlet grid of the rectifying module according to the second grid target opening and closing degree and the state information;
determining the weight of the opening degree and the closing degree according to the ambient temperature and the wind speed of the environment where the direct current power supply system is positioned;
determining a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first grid required opening and closing degree and the opening and closing degree weight, and determining a third grid target opening and closing degree of the rectifier module air outlet grid according to the third grid required opening and closing degree and the opening and closing degree weight;
the opening and closing degree of the battery heat dissipation air outlet grating is controlled according to the first grating target opening and closing degree, the opening and closing degree of the channel grating is controlled according to the second grating target opening and closing degree, and the opening and closing degree of the rectifying module air outlet grating is controlled according to the third grating target opening and closing degree.
2. The method according to claim 1, wherein the method further comprises:
determining a first rotating speed of the battery cooling fan and a second rotating speed of the direct current module cooling fan according to the ambient temperature and the wind speed; and is combined with the other components of the water treatment device,
controlling the working state of the battery cooling fan according to the first rotating speed and the working state of the direct current module cooling fan according to the second rotating speed;
the determining the first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first grid demand opening and closing degree and the opening and closing degree weight, and determining the third grid target opening and closing degree of the rectification module air outlet grid according to the third grid demand opening and closing degree and the opening and closing degree weight includes:
and determining a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first rotating speed, the first grid required opening and closing degree and the opening and closing degree weight, and determining a third grid target opening and closing degree of the rectification module air outlet grid according to the second rotating speed, the third grid required opening and closing degree and the opening and closing degree weight.
3. The method according to claim 1, wherein the method further comprises:
determining a third rotating speed of a channel fan arranged at the channel grating according to the second grating target opening and closing degree;
and controlling the working state of the channel fan according to the third rotating speed.
4. The method according to claim 1, wherein the method further comprises:
synchronously acquiring battery temperature information of the storage battery pack and state information of the rectifying module according to time interval duration;
the determining, according to the obtained battery temperature information of the battery pack of the dc power supply system, the current temperature requirement of the battery pack, and the obtained state information of the rectifying module of the dc power supply system, the current heat dissipation requirement of the rectifying module, includes:
calculating the battery temperature change rate of adjacent battery temperatures in the battery temperature information and the state change rate of adjacent state information in the state information;
constructing a battery temperature coordinate system according to each battery temperature in the battery temperature information and the battery temperature change rate, and constructing a direct current module state coordinate system according to each state in the state information and the state change rate;
determining a target battery heat dissipation requirement corresponding to each battery temperature in the battery temperature coordinate system based on the battery temperature information and the battery temperature change rate, and determining a target direct current module heat dissipation requirement corresponding to each state information in the direct current module state coordinate system based on the state information and the state change rate;
based on interpolation, determining the current temperature requirement of the storage battery pack according to the target battery heat dissipation requirement, and determining the current heat dissipation requirement of the rectifying module according to the target direct current module heat dissipation requirement.
5. The method of claim 4, wherein the time interval duration is determined by:
determining the maximum battery temperature change rate in the battery temperature change rates of the preset times which are the latest from the last acquisition, and determining the average state change rate of the state change rates of the preset times which are the latest from the last acquisition;
determining a state information weight according to the average state change rate, and determining a battery temperature weight according to the state information weight;
and determining the time interval duration according to the state information weight, the battery temperature weight, the maximum battery temperature change rate and the average state change rate.
6. The method according to any one of claims 1-5, wherein determining the opening and closing degree weight according to the ambient temperature and the wind speed of the environment in which the dc power supply system is located comprises:
determining a temperature factor according to a temperature difference value between the ambient temperature of the environment where the direct current power supply system is located and a preset temperature threshold value, and determining a wind speed factor according to a wind speed difference value between the wind speed of the environment where the direct current power supply system is located and a preset wind speed threshold value;
and determining the opening and closing degree weight according to the ambient temperature, the wind speed, the temperature factor and the wind speed factor based on a preset weight calculation formula.
7. The method of claim 6, wherein the weight calculation formula w i The method comprises the following steps:
Figure QLYQS_1
wherein u is f Is the kinematic viscosity coefficient of air, z vi For the wind speed factor, v i For the wind speed, z Ti T is the temperature factor i And alpha is the angle between the wind direction and the air outlet grille for the ambient temperature.
8. A grid control device for a dc power supply system, comprising:
the first determining module is configured to determine the current temperature requirement of the storage battery pack according to the acquired battery temperature information of the storage battery pack of the direct-current power supply system, and determine the current heat dissipation requirement of the rectifying module according to the acquired state information of the rectifying module of the direct-current power supply system;
the second determining module is configured to determine a first grid demand opening and closing degree of a battery heat dissipation air outlet grid and a second grid target opening and closing degree of a channel grid from the rectifying module to the storage battery pack according to the temperature demand;
the third determining module is configured to determine a third grid demand opening and closing degree of the air outlet grid of the rectifying module according to the second grid target opening and closing degree and the state information;
the fourth determining module is configured to determine the opening and closing degree weight according to the ambient temperature and the wind speed of the environment where the direct-current power supply system is located;
a fifth determining module configured to determine a first grid target opening and closing degree of the battery heat dissipation air outlet grid according to the first grid required opening and closing degree and the opening and closing degree weight, and determine a third grid target opening and closing degree of the rectifying module air outlet grid according to the third grid required opening and closing degree and the opening and closing degree weight;
the control module is configured to control the opening and closing degree of the battery heat dissipation air outlet grating according to the first grating target opening and closing degree, control the opening and closing degree of the channel grating according to the second grating target opening and closing degree and control the opening and closing degree of the rectifying module air outlet grating according to the third grating target opening and closing degree.
9. An electronic device, comprising:
a memory for storing program code for implementing the method of any one of claims 1-6;
and the processor is used for executing the program codes in the memory so as to control the opening and closing degrees of the battery heat dissipation air outlet grating, the channel grating and the rectifying module air outlet grating.
10. A direct current power supply system, characterized in that it comprises the electronic device of claim 9.
CN202210355057.8A 2022-04-06 2022-04-06 Grid control method, device and equipment for direct-current power supply system and direct-current power supply system Active CN114744329B (en)

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