CN117039274A - Control method of heat dissipating device, energy storage power supply and storage medium - Google Patents

Control method of heat dissipating device, energy storage power supply and storage medium Download PDF

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Publication number
CN117039274A
CN117039274A CN202310892659.1A CN202310892659A CN117039274A CN 117039274 A CN117039274 A CN 117039274A CN 202310892659 A CN202310892659 A CN 202310892659A CN 117039274 A CN117039274 A CN 117039274A
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China
Prior art keywords
power
temperature
gear
heat dissipation
fan
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CN202310892659.1A
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Chinese (zh)
Inventor
陈振龙
吴东
陈熙
王雷
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Ecoflow Technology Ltd
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Ecoflow Technology Ltd
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Priority to CN202310892659.1A priority Critical patent/CN117039274A/en
Publication of CN117039274A publication Critical patent/CN117039274A/en
Pending legal-status Critical Current

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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
    • H01M10/63—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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
    • 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
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20209—Thermal management, e.g. fan control

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application provides a control method of a heat dissipating device, an energy storage power supply and a storage medium, wherein the method comprises the following steps: acquiring the electric energy transmission power of an energy storage power supply, and acquiring the current temperature of each power conversion plate, the temperature of a battery core in a battery module and the current gear of a heat dissipation device; determining an operation strategy of the heat dissipation device according to the current gear, the electric energy transmission power, the current temperature of each power conversion plate and the temperature of the battery cell; different operation strategies correspond to different fan operation states; and generating a heat dissipation control signal according to the operation strategy of the heat dissipation device, and sending the heat dissipation control signal to the heat dissipation device so as to control the operation state of each fan in the heat dissipation device. The method can reduce noise of the energy storage equipment in the running process.

Description

Control method of heat dissipating device, energy storage power supply and storage medium
Technical Field
The present application relates to the field of energy storage power supply technologies, and in particular, to a control method of a heat dissipating device, an energy storage power supply, and a storage medium.
Background
With the popularization of outdoor power supplies, more and more energy storage power supplies enter people's life. The energy storage power supply needs to perform corresponding processing on the direct current output by the internal energy storage battery so as to output at least one of direct current or alternating current. The phenomenon that generates heat can appear in the use of energy storage power supply, need in time dispel the heat to the inside heat that produces of power supply, otherwise can influence the life of the inside device of energy storage power supply, even lead to energy storage power supply overheat damage when serious. The traditional energy storage power supply generally adopts a fan to radiate heat, the heat radiation control strategy is simpler, and larger noise can exist in the heat radiation process, so that the user experience is seriously affected.
Disclosure of Invention
The application mainly aims to provide a control method of a heat dissipating device, an energy storage power supply and a storage medium, and aims to solve the problem of large noise in the heat dissipating process of the energy storage power supply.
In a first aspect, the present application provides a control method of a heat dissipating device, which is applied to an energy storage power supply; the energy storage power supply comprises a battery module, the heat dissipation device and at least one power conversion plate; the heat dissipation device comprises at least one fan; the at least one power conversion plate comprises a corresponding power conversion circuit for converting and outputting the direct current output by the battery module; the heat dissipation device is used for dissipating the internal heat of the energy storage power supply; the control method comprises the following steps:
acquiring the electric energy transmission power of the energy storage power supply, and acquiring the current temperature of each power conversion plate, the temperature of the battery cell in the battery module and the current gear of the heat dissipation device;
determining an operation strategy of the heat dissipation device according to the current gear, the electric energy transmission power, the current temperature of each power conversion plate and the battery core temperature; different operation strategies correspond to different fan operation states;
And generating a heat dissipation control signal according to the operation strategy of the heat dissipation device, and sending the heat dissipation control signal to the heat dissipation device so as to control the operation state of each fan in the heat dissipation device.
In a second aspect, the application further provides an energy storage power supply, which comprises a control device, a battery module, a heat dissipation device and at least one power conversion plate; the heat dissipation device comprises at least one fan; the at least one power conversion plate comprises a corresponding power conversion circuit for converting and outputting the direct current output by the battery module; the heat dissipation device is used for dissipating the internal heat of the energy storage power supply; the control device is respectively connected with the power conversion plate and the heat dissipation device; the control device is used for executing the control method of the heat dissipating device according to any one of the embodiments of the present application.
In a third aspect, the present application also provides a storage medium for computer readable storage, where the storage medium stores one or more computer programs, where the one or more computer programs are executable by one or more processors to implement a method for controlling a heat dissipating device according to any one of the embodiments of the present application.
The embodiment of the application provides a control method of a heat dissipating device, which comprises the steps of obtaining electric energy transmission power of an energy storage power supply, and obtaining the current temperature of each power conversion plate, the temperature of a battery cell in a battery module and the current gear of the heat dissipating device; determining an operation strategy of the heat dissipation device according to the current gear, the electric energy transmission power, the current temperature of each power conversion plate and the temperature of the battery cell; different operation strategies correspond to different fan operation states; and generating a heat dissipation control signal according to the operation strategy of the heat dissipation device, and sending the heat dissipation control signal to the heat dissipation device so as to control the operation state of each fan in the heat dissipation device. According to the control method provided by the embodiment of the application, when the heat dissipating device is controlled, different operation strategies of the heat dissipating device can be determined according to the power transmission power of the energy storage power supply, the current temperature of each power conversion plate, the temperature of the battery cell and the current gear of the heat dissipating device, so that the operation states of each fan in the heat dissipating device can be controlled. According to the embodiment of the application, the fan is controlled to operate in different states according to different current conditions of the energy storage power supply while radiating the internal heat of the energy storage power supply, so that the noise emitted in the radiating process of the fan is effectively reduced, and the energy storage power supply is in a low-noise state in most scenes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of an energy storage power supply provided by an embodiment of the present application;
fig. 2 is a schematic flow chart of steps of a control method of a heat dissipating device according to an embodiment of the present application;
fig. 3 is a schematic flow chart of steps of a control method of another heat dissipating device according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an energy storage power supply according to an embodiment of the present application;
fig. 5 is a schematic flow chart of steps of a control method of a heat dissipating device according to another embodiment of the present application;
fig. 6 is a schematic block diagram of an energy storage power supply according to an embodiment of the present application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application; it will be apparent that the described embodiments are some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.
Currently, the on logic of the fan in the energy storage power supply is that the fan is turned on as long as the energy storage power supply is in use, and the duty ratio of the driving fan signal is increased along with the increase of the charging or discharging power of the energy storage power supply. The noise of the fan is related to the rotating speed, and if the energy storage power supply is started or the current discharging power of the energy storage power supply is large, but the environment temperature is low, the accumulated heat of the energy storage power supply is not excessive, and excessive noise can be generated when the fan is started. That is, the fan on logic of the conventional energy storage power supply can make the noise of the energy storage power supply when in use more obvious, and seriously affects the user experience.
Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Fig. 1 is a schematic block diagram of an energy storage power supply according to an embodiment of the present application. As shown in fig. 1, the energy storage power supply 100 includes a battery module 110, a heat sink 120, and at least one power conversion plate 130.
The heat dissipation device 120 includes at least one fan, and the heat dissipation device 120 is configured to dissipate heat of the energy storage power source 100, such as the battery module 110 and the at least one power conversion board 130. The power conversion board 130 includes a corresponding power conversion circuit to convert the dc power output from the battery module 110 and output the converted dc power.
It should be noted that the battery module 110 may include a plurality of battery cells, and the battery module 110 may be connected to the power conversion circuit in the power conversion board 130. The power conversion circuit may include circuit units such as an inverter circuit, a voltage conversion circuit, a rectifier circuit, a voltage stabilizing circuit, and the like. The heat dissipation device 120 may further include other heat dissipation devices besides a fan, and the heat dissipation device 120 may dissipate heat for the battery module 110 and the power conversion plate 130 through a heat dissipation air channel.
It should be noted that, the energy storage power supply 100 is used to connect to and supply power to an electronic device, and the electronic device may include a home air conditioner, an outdoor air conditioner, a washing machine, a water heater, a mower, and the like. The stored energy power source 100 may also include other functional modules, which may include control devices, display devices, power interface devices, etc.
Referring to fig. 2, fig. 2 is a schematic step flow diagram of a control method of a heat dissipating device according to an embodiment of the present application, where the control method of the heat dissipating device can be applied to the energy storage power supply 100 shown in fig. 1, and in particular, can be applied to a control device of the energy storage power supply 100. The control method of the heat dissipation device comprises the following steps:
s101, acquiring the electric energy transmission power of an energy storage power supply, and acquiring the current temperature of each power conversion plate, the temperature of a battery cell in a battery module and the current gear of a heat dissipation device.
In this step, the operating state of the energy storage power supply includes a charging state or a discharging state, and the electric energy transmission power includes a charging power or a discharging power. When the energy storage power supply is in a charging state, the electric energy transmission power of the energy storage power supply is charging power. When the energy storage power supply is in a discharging state, the electric energy transmission power of the energy storage power supply is the discharging power. The heat sink may have a plurality of gears including, for example, zero, first, second, and third. The current gear of the heat dissipating device refers to the gear of the heat dissipating device.
In this step, the power conversion board may be one or more. When there are a plurality of power conversion boards, the current temperature of each power conversion board may be the temperature corresponding to each of the plurality of power conversion boards. In this step, when there are a plurality of power conversion boards, one target temperature may be selected from the temperatures corresponding to the power conversion boards as the current temperature of each power conversion board, and the current temperature may be obtained by calculation according to the temperatures corresponding to the power conversion boards. The specific calculation mode may be determined according to the actual situation, for example, calculation is performed by means of weighted average, variance, taking the maximum value, and the like.
In this step, the energy storage power supply may set a plurality of temperature sensors, and the current temperature of each power conversion plate and the temperature of the battery cell in the battery module are respectively collected by the plurality of temperature sensors. For example, each power conversion plate is provided with at least one temperature sensor, respectively, so as to acquire the current temperature of each power conversion plate.
In this step, the battery module may include a plurality of battery cells, and the battery module may be provided with one or more temperature sensors to obtain the temperature of the battery cells within the battery module. When the battery module is provided with a plurality of temperature sensors, the plurality of temperature sensors can collect a plurality of battery cell temperatures. Therefore, the maximum cell temperature can be selected from the plurality of collected cell temperatures as the cell temperature in the battery module.
S102, determining an operation strategy of the heat dissipation device according to the current gear, the electric energy transmission power, the current temperature of each power conversion plate and the temperature of the battery cell.
In this step, the heat sink includes at least one fan. Different operation strategies of the heat dissipation device correspond to different fan operation states. The rotational speed of the fans may be different and the number of fans turned on may be different under different fan operating conditions, and thus the noise emitted by the fans may be different.
In the step, on the basis of the current gear of the heat dissipating device, through the electric energy transmission power, the current temperature of each power conversion plate and the battery cell temperature, the operation strategy of the heat dissipating device is comprehensively considered, and excessive noise generated by the fan in the heat dissipating device is avoided under the condition that the related fan is not required to be started or the operation rotating speed of the fan is not required to be increased.
For example, when the power transmission power of the energy storage power supply is large and the current temperature of each power conversion plate and the temperature of the battery core do not meet the relevant conditions, the fan in the heat dissipation device can not be started. According to the embodiment of the application, the current temperature of each power conversion plate and the temperature of the battery core are combined to control the fan to operate in different states in addition to the electric energy transmission power corresponding to the current gear, so that the noise generated in the heat dissipation process of the fan can be reduced while the internal heat of the energy storage power supply is dissipated.
In this step, when determining the operation strategy of the heat dissipating device, not only the power transmission power of the energy storage power supply, but also the current temperature of each power conversion plate and the temperature of the battery cell need to be considered. That is, the present step adds the battery cell temperature to control the operation strategy of the heat sink, and can prevent the battery cell temperature in the battery module from being over-heated in addition to preventing the power conversion plates from being over-heated.
In this step, the operation strategy refers to a strategy for controlling the operation state of the fan, so that different operation strategies correspond to different operation states of the fan. Such as the duty cycle value required to drive the fans, the rotational speed, or the number of fans required to be driven, etc. may be included in the operating strategy.
Compared with the prior art, the embodiment of the application simply controls the fan to operate according to the charging power or discharging power, so that the fan can be controlled to operate in different states when the condition is met, and the noise generated in the heat dissipation process of the fan can be effectively reduced when the heat dissipation requirement is met, so that the energy storage power supply is in a low-noise state in most scenes.
S103, generating a heat dissipation control signal according to the operation strategy of the heat dissipation device, and sending the heat dissipation control signal to the heat dissipation device to control the operation state of each fan in the heat dissipation device.
In this step, the heat dissipation control signal is used for controlling the heat dissipation device to operate according to the operation strategy so as to control the operation state of each fan in the heat dissipation device, so that the heat dissipation device reasonably controls the noise emitted by each fan while meeting the heat dissipation requirement of the energy storage power supply, and compared with the fan starting logic of the traditional energy storage power supply, the noise of the energy storage power supply during use can be obviously reduced.
In this step, when the fans in the heat dissipating device are one, the operation state of the fans may include on and off. When there are a plurality of fans in the heat dissipation device, the operation state of each fan may include turning on one fan, turning on a plurality of fans, and turning on none of the fans.
In this step, the operation state of each fan may include the rotational speed at which the fan operates. The rotation speed of the fan can be zero, and can also be increased in proportion to the gear of the heat dissipating device, or be decreased in proportion to the gear of the heat dissipating device. When there are a plurality of fans in the heat sink, the rotational speeds at which the different fans operate may be the same or different.
According to the control method of the heat dissipating device, when the heat dissipating device is controlled, different operation strategies of the heat dissipating device can be determined according to the power transmission power of the energy storage power supply, the current temperature of each power conversion plate, the temperature of the battery core and the current gear of the heat dissipating device, so that the operation states of all fans in the heat dissipating device are controlled, and noise caused by the operation of the fans is large.
Referring to fig. 3, fig. 3 is a flowchart illustrating a control method of a heat dissipating device according to another embodiment of the present application.
As shown in fig. 3, the control method of the heat dissipating device includes steps S201 to S205.
Step S201, obtaining the power transmission power of the energy storage power supply, and obtaining the current temperature of each power conversion plate, the temperature of the battery core in the battery module, and the current gear of the heat dissipating device.
The electric power transmission power may include a charging power and a discharging power, among others. The power conversion board may include a maximum power point tracking (Maximum Power Point Tracking, MPPT) board, a power conditioning circuit (Power Supply Driver, PSDR) board. In other embodiments, the power conditioning circuit board may also include at least one of an ac-dc conversion circuit board, an dc-ac conversion circuit board, a bi-directional ac-dc conversion circuit board, and a bi-directional voltage conversion circuit board. The battery cell temperature refers to the temperature of the battery cells in the battery module.
In an embodiment, the temperature of the battery cell in the battery module may be collected by a temperature collection device disposed around the battery cell, and the temperature collection device may include a temperature sensor. It should be noted that, in the energy storage power supply, it is most important that the temperature of the battery cell cannot exceed a certain temperature range, otherwise, the battery cell is damaged or other problems are caused. Under normal conditions, the temperature of the battery cell in the energy storage power supply does not greatly fluctuate, the temperature in the environment does not greatly fluctuate, the temperature of the battery cell can be influenced by the environment temperature to a certain extent, for example, if the environment temperature is very low, the temperature of the battery cell can be similar to the environment temperature. And whether the fan needs to be turned on, the current ambient temperature needs to be considered in addition to the heat brought by the current charge or discharge power. According to the scheme, the battery cell temperature acquired by the multiplexing temperature acquisition device is approximately similar to the ambient temperature, the battery cell temperature is added into a fan starting strategy, the ambient temperature detection unit is not required to be specially increased to detect the ambient temperature, and the cost can be reduced.
Step S202, if the power transmission power, the current temperature of each power conversion plate or the battery core temperature meet the upshift condition, adding one to the current gear to obtain the target gear.
The upshift condition includes at least one of a power condition, a maximum temperature condition, a temperature condition of each power conversion plate, and a cell temperature condition. For example, the power condition includes that the power transmission power rises to be greater than or equal to a first preset power threshold, the maximum temperature condition includes that the maximum temperature of the current temperatures of the power conversion boards and the battery cell temperature rises to be greater than or equal to the first preset temperature threshold, the temperature condition of the power conversion boards includes that at least one of the current temperatures of the power conversion boards rises to be greater than or equal to a second preset temperature threshold, and the battery cell temperature condition includes that the battery cell temperature rises to be greater than or equal to the first preset battery cell temperature.
It should be noted that, under different current gear positions, the corresponding upshift conditions are different, and different current gear positions correspond to different power conditions, maximum temperature conditions, temperature conditions of each power conversion plate, and cell temperature conditions. That is, the first preset power threshold, the first preset temperature threshold, the second preset temperature threshold, and the first preset cell temperature may be determined according to a current gear, and the higher the current gear, the higher the corresponding preset power or preset temperature. When the upshift condition corresponding to the current gear is met, the current gear is increased by one to obtain the target gear, so that the upshift operation can be intelligently performed while the heat dissipation requirement is met, and the noise emitted by the fan in the heat dissipation process is reduced as much as possible.
For example, when the power transmission power, the current temperature of each power conversion plate or the temperature of the battery core meets the condition that the upshift condition is not met, the power transmission power of the energy storage power supply is lower, the current temperature or the temperature of the battery core is lower, and the phenomenon that the accumulated heat of the energy storage power supply is excessive is avoided. When the power transmission power, the current temperature of each power conversion plate or the temperature of the battery core meet the upshift condition, the power transmission power of the energy storage power supply is higher, the current temperature or the temperature of the battery core is higher, and the current gear is required to be increased by one to obtain the target gear, so that the heat dissipation capacity of the heat dissipation device is improved.
In one embodiment, the electrical energy transfer power includes a charging power and a discharging power. And if the electric energy transmission power is the charging power, the maximum value of the target gear is the first value. And if the electric energy transmission power is the discharge power, the maximum value of the target gear is the second value. Wherein the second value is greater than the first value. It should be noted that the gear positions set by the energy storage power supply in the charge state and the discharge state may be different. The number of gear steps corresponding to the discharge state may be greater than the number of gear steps corresponding to the charge state.
Therefore, when the electric energy transmission power is the charging power, the stored energy power supply is indicated to be in a charging state, and the maximum value of the target gear is a first value. The first value is for example 3, indicating that the stored energy power supply in the charged state comprises 3 gears. And when the electric energy transmission power is the discharge power, indicating that the energy storage power supply is in a discharge state, wherein the maximum value of the target gear is a second value. The second value is for example 4, indicating that the energy storage power supply in the discharged state comprises 4 gear positions. That is, when the charging state and the discharging state are provided with different gear positions, the charging process fan is not started to the state of maximum heat dissipation capability, because the maximum charging power is usually lower than the maximum discharging power, the maximum heat generation amount is lower than the heat generation amount in the discharging process, and therefore, even if the charging process fan is not in the maximum heat dissipation capability, the heat dissipation requirement in the charging state can be met, and the effect of silent charging is achieved. The maximum value of the target gear corresponding to the discharging power is larger than the maximum value of the target gear corresponding to the charging power, so that the maximum heat dissipation capacity of the energy storage power supply in a discharging state can be improved, extreme working conditions are prevented, the safety and reliability of the energy storage power supply can be improved, and meanwhile, the low noise effect in the charging process is ensured.
For example, when the electric energy transmission power is the charging power, the upshifting process of the heat dissipating device is:
if the current gear of the energy storage power supply is zero gear, when the charging power of the energy storage power supply is increased to be greater than the first charging power threshold and smaller than or equal to the second charging power threshold, or the maximum temperature of the current temperature of the power conversion plate is increased to be greater than the first temperature threshold of the power conversion plate and smaller than or equal to the second temperature threshold of the power conversion plate, the current gear is increased by one to obtain the target gear of the heat radiating device as a gear.
If the current gear of the energy storage power supply is the first gear, when the charging power of the energy storage power supply is increased to be greater than the second charging power threshold and smaller than or equal to the third charging power threshold, or the maximum temperature of the current temperature of the power conversion plate is increased to be greater than the second temperature threshold of the power conversion plate and smaller than or equal to the third temperature threshold of the power conversion plate, or the temperature of the battery core is increased to be greater than or equal to the first temperature threshold of the battery core and smaller than the second temperature threshold of the battery core, the current gear is increased by one to obtain the target gear of the heat dissipating device to be the second gear.
If the current gear of the energy storage power supply is the second gear, when the charging power of the energy storage power supply is increased to be greater than a third charging power threshold value and the maximum temperature of the current temperature of the power conversion plate is increased to be greater than a third temperature threshold value of the power conversion plate, or when the charging power is increased to be greater than the third charging power threshold value and the temperature of the battery cell is increased to be greater than or equal to a second temperature threshold value of the battery cell, the current gear is increased by one to obtain the target gear of the heat dissipation device to be the third gear. The third charging power threshold is greater than the first charging power threshold and less than the second charging power threshold.
For example, when the electric energy transmission power is the discharge power, the upshifting process of the heat dissipating device is:
if the current gear of the energy storage power supply is zero gear, when the discharge power of the energy storage power supply is increased to be greater than the first discharge power threshold and smaller than or equal to the second discharge power threshold, or the maximum temperature of the current temperature of the power conversion plate is increased to be greater than the first temperature threshold of the power conversion plate and smaller than or equal to the fourth temperature threshold of the power conversion plate, the current gear is increased by one to obtain the target gear of the heat radiating device as a gear.
If the current gear of the energy storage power supply is the first gear, when the discharge power of the energy storage power supply is increased to be greater than the second discharge power threshold value, or the maximum temperature of the current temperature of the power conversion plate is increased to be greater than the fourth temperature threshold value of the power conversion plate and less than or equal to the fifth temperature threshold value of the power conversion plate, or the temperature of the battery core is increased to be greater than or equal to the fifth temperature threshold value of the battery core and less than the sixth temperature threshold value of the battery core, and the discharge power is increased to be greater than the third discharge power threshold value, the current gear is increased to obtain the target gear of the heat dissipation device to be the second gear. The third discharge power threshold is greater than the first discharge power threshold and less than the second discharge power threshold.
If the current gear of the energy storage power supply is the second gear, when the maximum temperature of the current temperature of the power conversion plate is increased to be greater than the fifth temperature threshold of the power conversion plate and less than or equal to the sixth temperature threshold of the power conversion plate, or the discharge power is increased to be greater than the third discharge power threshold and the temperature of the battery core is increased to be greater than or equal to the sixth temperature threshold of the battery core and less than the seventh temperature threshold of the battery core, adding one to the current gear to obtain the target gear of the heat dissipation device to be the third gear; wherein the third preset rotational speed is greater than the second preset rotational speed.
If the current gear of the energy storage power supply is the third gear, when the maximum temperature of the current temperature of the power conversion plate is increased to be greater than the sixth temperature threshold of the power conversion plate, or when the discharge power is increased to be greater than the third discharge power threshold and the temperature of the battery core is increased to be greater than or equal to the seventh temperature threshold of the battery core, the current gear is increased by one to obtain the target gear of the heat dissipation device as the fourth gear.
Step S203, if the power transmission power, the current temperature of each power conversion board and the battery core temperature meet the downshift condition, the target gear is obtained by subtracting one according to the current gear.
The downshift condition includes at least two conditions of a power condition, a maximum temperature condition, a temperature condition of each power conversion board, and a cell temperature condition. For example, the power condition includes that the power transmission power is reduced to be less than or equal to a second preset power threshold, the maximum temperature condition includes that the current temperature of each power conversion plate and the maximum temperature of the cell temperatures is reduced to be less than or equal to a third preset temperature threshold, the temperature condition of each power conversion plate includes that one of the current temperatures of each power conversion plate is reduced to be less than or equal to a fourth preset temperature threshold, and the cell temperature condition includes that the cell temperature is reduced to be less than or equal to the second preset cell temperature.
It should be noted that, in different current gear positions, the corresponding downshift conditions are different. The second preset power threshold, the third preset temperature threshold, the fourth preset temperature threshold and the second preset battery cell temperature may be determined according to a current gear, and the higher the current gear is, the larger the corresponding preset power or preset temperature is. When at least two of the power transmission power, the current temperature of each power conversion plate or the temperature of the battery cell meet the downshift condition, the current gear needs to be reduced by one to obtain the target gear at the moment, so that the downshift operation can be intelligently performed while the heat dissipation requirement is met, and the noise emitted by a fan in the heat dissipation process is reduced as much as possible.
The downshift condition is different from the condition required to be satisfied by the upshift condition, and the downshift condition is required to satisfy more conditions. The upshift condition in the embodiment of the application needs to satisfy at least one of a power condition, a maximum temperature condition, a temperature condition of each power conversion plate, and a cell temperature condition. The downshift condition needs to satisfy at least two conditions among the power condition, the maximum temperature condition, the temperature condition of each power conversion plate, and the cell temperature condition, that is, the downshift condition is stricter than the upshift condition. Only if a plurality of conditions in the judging conditions meet the downshift conditions, the downshift is allowed, so that the situation that heat cannot be timely discharged after the downshift to cause the fan to meet the upshift conditions again and then upshift operation occurs can be avoided, the phenomenon that the fan repeatedly upshifts and downshifts in the operation process to cause sudden high and sudden low noise and influence the service life of the fan and the problem that the user experience is influenced can be avoided, and the situation that the heat dissipation requirement of the energy storage power supply is influenced due to the downshift is avoided, and the safety and reliability of the energy storage power supply can be improved.
In one embodiment, the electrical energy transfer power includes a charging power and a discharging power. And if the electric energy transmission power is the charging power, the maximum value of the target gear is the first value. And if the electric energy transmission power is the discharge power, the maximum value of the target gear is the second value. Wherein the second value is greater than the first value. Wherein the second value is greater than the first value.
It should be noted that the gear positions set by the energy storage power supply in the charge state and the discharge state may be different. For example, the maximum value of the target gear corresponding to the charging power is 3, that is, the number of gears corresponding to the charging state is 3. The maximum value of the target gear corresponding to the discharge power is 4, namely the number of gears corresponding to the discharge state is 4. That is, the number of shift positions corresponding to the discharge state may be greater than the number of shift positions corresponding to the charge state.
In the logic of the discharging upshift, a gear (for example, a fourth gear) which is not easy to trigger is reserved, so that the heat dissipation requirement of the energy storage device can be met even if the energy storage power supply works under extreme conditions, and the safety and reliability of the energy storage power supply are improved.
For example, when the electric energy transmission power is the charging power, the downshift process of the heat dissipating device is:
if the current gear of the energy storage power supply is the first gear, when the charging power of the energy storage power supply is reduced to be smaller than or equal to the first charging power threshold value and the current temperature of the power conversion plate is reduced to be smaller than or equal to the first temperature threshold value of the power conversion plate, or when the current temperature of the power conversion plate is reduced to be smaller than or equal to the first temperature threshold value of the power conversion plate and the temperature of the battery cell is reduced to be smaller than or equal to the third temperature threshold value of the battery cell, the current gear is reduced by one, and the target gear of the heat dissipation device is obtained to be the zero gear.
If the current gear of the energy storage power supply is the second gear, when the charging power of the energy storage power supply is reduced to be larger than the first charging power threshold and smaller than or equal to the second charging power threshold, the current temperature of the power conversion plate is reduced to be smaller than or equal to the first temperature threshold of the power conversion plate, and the temperature of the battery cell is reduced to be smaller than or equal to the fourth temperature threshold of the battery cell, the current gear is reduced to obtain the target gear of the heat dissipation device as the first gear. The fourth temperature threshold of the battery cell is larger than the third temperature threshold of the battery cell.
If the current gear of the energy storage power supply is the third gear, when the charging power of the energy storage power supply is reduced to be larger than the second charging power threshold value, the current temperature of the power conversion plate is reduced to be smaller than or equal to the first temperature threshold value of the power conversion plate, and the temperature of the battery core is reduced to be smaller than or equal to the fifth temperature threshold value of the battery core, the current gear is reduced by one to obtain the target gear of the heat radiating device as the second gear. The fifth temperature threshold of the battery cell is larger than the fourth temperature threshold of the battery cell.
For example, when the electric energy transmission power is the discharge power, the downshift process of the heat dissipating device is:
if the current gear of the energy storage power supply is the first gear, when the discharging power of the energy storage power supply is reduced to be smaller than or equal to the first discharging power threshold value, the current temperature of the power conversion plate is reduced to be smaller than or equal to the third temperature threshold value of the power conversion plate, and the temperature of the battery core is reduced to be larger than the fifth temperature threshold value of the battery core and smaller than or equal to the sixth temperature threshold value of the battery core, the current gear is reduced to obtain the target gear of the heat dissipating device as the zero gear.
If the current gear of the energy storage power supply is the second gear, when the discharging power of the energy storage power supply is reduced to be larger than the first discharging power threshold and smaller than or equal to the second discharging power threshold, the current temperature of the power conversion plate is reduced to be smaller than or equal to the seventh temperature threshold of the power conversion plate, or the discharging power is reduced to be larger than the first discharging power threshold and smaller than the third discharging power threshold, and the temperature of the battery core is reduced to be larger than the fifth temperature threshold of the battery core and smaller than or equal to the sixth temperature threshold of the battery core, the current gear is reduced to obtain the target gear of the heat dissipating device as the first gear.
If the current gear of the energy storage power supply is the third gear, when the discharging power of the energy storage power supply is reduced to be larger than a second discharging power threshold value, the current temperature of the power conversion plate is reduced to be smaller than or equal to an eighth temperature threshold value of the power conversion plate, and the temperature of the battery core is reduced to be smaller than or equal to the eighth temperature threshold value of the battery core, the current gear is reduced by one to obtain a target gear of the heat radiating device as the second gear; the eighth temperature threshold of the battery cell is larger than the seventh temperature threshold of the battery cell, and the eighth temperature threshold of the power conversion plate is larger than the seventh temperature threshold of the power conversion plate.
If the current gear of the energy storage power supply is the fourth gear, when the discharging power of the energy storage power supply is reduced to be larger than the second discharging power, the current temperature of the power conversion plate is reduced to be smaller than or equal to a ninth temperature threshold of the power conversion plate, and the temperature of the battery core is reduced to be smaller than the ninth temperature threshold of the battery core, the current gear is reduced by one to obtain a target gear of the heat dissipation device as the third gear; the ninth temperature threshold of the battery cell is larger than the eighth temperature threshold of the battery cell, and the ninth temperature threshold of the power conversion plate is larger than the eighth temperature threshold of the power conversion plate.
Step S204, determining an operation strategy corresponding to the heat dissipation device according to the target gear.
The operation strategies of the heat dissipation devices corresponding to different gears are different, and the operation strategies can comprise the rotating speed parameters of the working fans and also comprise the opening quantity or the opening positions of the working fans. The rotation speed parameter and the opening quantity of the working fan can be increased in proportion to the gear of the heat radiating device.
In an embodiment, the heat dissipating device includes at least one air intake fan and at least one air outlet fan. When the target gear is lower than the preset gear, determining an air inlet fan or an air outlet fan of the heat radiating device as a working fan; the preset gear is a gear larger than zero; and when the target gear is equal to or higher than the preset gear, determining all fans of the heat radiating device as working fans.
It should be noted that when the target gear is lower than the preset gear, the heat dissipation requirement of the energy storage power supply is smaller, so that the heat dissipation requirement of the energy storage power supply can be met only by determining that the air inlet fan or the air outlet fan of the heat dissipation device is a working fan, and therefore all fans do not need to be started, and noise caused by starting of a plurality of fans is greatly reduced. When the target gear is equal to or higher than the preset gear, the heat dissipation requirement of the energy storage power supply is increased, so that all fans of the heat dissipation device are required to be determined to be working fans, and the heat dissipation of the internal heat of the energy storage power supply can be guaranteed.
Illustratively, as shown in FIG. 4, the stored energy power supply 100 includes an air intake fan 121 and an air outlet fan 122. The preset gear is the second gear. When the target gear of the heat sink is a first gear, the target gear is lower than a preset gear, it may be determined that the air intake fan 121 of the heat sink is a working fan or that the air outlet fan 122 of the heat sink is a working fan. When the target gear of the heat sink is the second gear or the third gear, the target gear is equal to or higher than the preset gear, it may be determined that the air intake fan 121 and the air outlet fan 122 of the heat sink are both working fans.
In an embodiment, when the target gear is lower than the preset gear, determining a rotation speed parameter of the working fan as a first preset value; when the target gear is higher than or equal to the preset gear, determining that the rotating speed parameter of the working fan is a second preset value, wherein the magnitude of the second preset value and the target gear are in positive correlation; wherein the second preset value is greater than the first preset value.
It should be noted that the rotation speed parameter of the working fan may be related to the target gear, and the rotation speed parameters of the working fans corresponding to different target gears may be different. For example, the rotational speed parameter of the working fan is positively correlated with the target gear, i.e., the larger the target gear is, the larger the rotational speed parameter of the working fan is. And when the target gear is higher than or equal to the preset gear, determining the rotating speed parameter of the working fan as a second preset value, wherein the second preset value is larger than the rotating speed parameter of the working fan determined when the target gear is lower than the preset gear.
Therefore, when the target gear is lower than the preset gear, the heat dissipation requirement of the energy storage power supply is lower, and therefore the working fan can meet the heat dissipation requirement of the energy storage power supply only by the rotation speed parameter of the first preset value, and noise caused by high wind speed of the fan is reduced. When the target gear is equal to or higher than the preset gear, the heat dissipation requirement of the energy storage power supply is larger, so that the rotating speed parameter of a second preset value larger than the first preset value needs to be provided, and the internal heat of the energy storage power supply can be guaranteed to be rapidly dissipated.
The rotational speed parameter may include a duty cycle of a drive signal driving the operating fan. The first preset value is a first preset duty cycle, and the second preset value is a second preset duty cycle. For example, when the target gear is lower than the preset gear, the rotation speed parameter of the working fan is determined to be a first preset duty cycle, and the first preset duty cycle is 0.31 to 0.35. The rotation speed of the working fan may be controlled to 500rpm to 550rpm by the first preset duty ratio. And when the target gear is higher than or equal to the preset gear, determining the rotating speed parameter of the working fan as a second preset duty ratio, wherein the second preset duty ratio is 0.41-0.45. The rotation speed of the working fan can be controlled to 800rpm to 850rpm by the second preset duty ratio.
Step S205, a heat dissipation control signal is generated according to the operation strategy of the heat dissipation device, and the heat dissipation control signal is sent to the heat dissipation device to control the operation state of each fan in the heat dissipation device.
It should be noted that, the heat dissipation control signal is used for controlling the heat dissipation device to operate according to the operation strategy so as to control the operation state of each fan in the heat dissipation device, so that the heat dissipation device can reduce the noise emitted by each fan while meeting the heat dissipation requirement of the energy storage power supply.
According to the control method of the heat dissipating device, whether the upshift condition or the downshift condition is met can be determined according to the electric energy transmission power of the energy storage power supply, the current temperature of each power conversion plate, the battery cell temperature and the current gear of the heat dissipating device, so that the current gear is increased by one to obtain a target gear when the upshift condition is met, the current gear is decreased by one to obtain the target gear when the downshift condition is met, then the operation strategy corresponding to the heat dissipating device is determined according to the target gear, and the heat dissipating control signal is generated according to the operation strategy of the heat dissipating device and then sent to the heat dissipating device, so that the operation state of each fan in the heat dissipating device can be controlled. According to the embodiment, the heat in the energy storage power supply can be radiated, and the noise emitted by the fan in the radiating process is reduced, so that the energy storage power supply in most scenes is in a low-noise state.
In an embodiment, the power conversion board includes a maximum power point tracking board (MPPT board) and a power conditioning circuit board (PSDR board), and the current temperature of the power conversion board includes a first temperature of the maximum power point tracking board and a second temperature of the power conditioning circuit board.
Exemplary, upshift strategies for a heat sink include: when the electric energy transmission power is smaller than or equal to a first power threshold value, or the maximum value of the first temperature and the second temperature is smaller than or equal to a first preset temperature threshold value, the target gear is determined to be the zero gear, and the operation strategy of the heat dissipating device comprises not starting the fan. When the electric energy transmission power is larger than a first power threshold and smaller than or equal to a second power threshold, and the maximum value of the first temperature and the second temperature is larger than a second preset temperature threshold, or when the first temperature is larger than the first temperature threshold of the maximum power point tracking board and smaller than or equal to the second temperature threshold of the maximum power point tracking board, or when the second temperature is larger than the first temperature threshold of the power conversion circuit board and smaller than or equal to the second temperature threshold of the power conversion circuit board, the current gear is increased by one to obtain a target gear as a first gear, and the operation strategy corresponding to the first gear is determined to comprise starting an air inlet fan, and the duty ratio of the air inlet fan is adjusted to be a first preset duty ratio. When the electric energy transmission power is larger than a second power threshold value and the maximum value of the first temperature and the second temperature is larger than a second preset temperature threshold value, or the first temperature is larger than the second temperature threshold value of the maximum power point tracking board, or the second temperature is larger than the second temperature threshold value of the power conversion circuit board and smaller than or equal to a third temperature threshold value of the power conversion circuit board, or the electric core temperature of an electric core in the energy storage power supply is larger than or equal to the first temperature threshold value of the electric core and smaller than the second temperature threshold value of the electric core, and the electric energy transmission power is larger than the third power threshold value, the current gear is increased by one to obtain a target gear as a second gear, the operation strategies corresponding to the second gear are determined to include starting an air inlet fan and an air outlet fan, and the duty ratios of the air inlet fan and the air outlet fan are adjusted to be the first preset duty ratio, wherein the third power threshold value is larger than the first power threshold value and smaller than the second power threshold value. When the electric energy transmission power is larger than a fourth power threshold value and the second temperature is larger than a fourth temperature threshold value of the power conversion circuit board, or when the electric energy transmission power is larger than the fourth power threshold value and the battery core temperature of the battery core is larger than or equal to a second temperature threshold value of the battery core, adding one to the current gear to obtain a target gear to be a third gear, determining a corresponding operation strategy of the third gear comprises starting an air inlet fan and an air outlet fan, and adjusting the duty ratio of the air inlet fan and the duty ratio of the air outlet fan to be a second preset duty ratio, wherein the second preset duty ratio is larger than the first preset duty ratio, and the fourth power threshold value is larger than the first power threshold value and smaller than the second power threshold value.
Exemplary, a downshift strategy for a heat sink includes: when the electric energy transmission power is smaller than or equal to a first power threshold value, the first temperature is smaller than a first temperature threshold value of the maximum power point tracking board and the second temperature is smaller than a fifth temperature threshold value of the power conversion circuit board, or the first temperature is smaller than a third temperature threshold value of the maximum power point tracking board, the second temperature is smaller than a fifth temperature threshold value of the power conversion circuit board and the temperature of the battery core is smaller than or equal to a third temperature threshold value of the battery core, the current gear is reduced by one to obtain a target gear as a zero gear, namely the operation strategy of the heat dissipating device comprises not starting an air inlet fan and an air outlet fan. When the electric energy transmission power is larger than the first power threshold and smaller than the second power threshold, the first temperature is smaller than the fourth temperature threshold of the maximum power point tracking board, the second temperature is smaller than the first temperature threshold of the power conversion circuit board, and the temperature of the battery core is smaller than or equal to the fourth temperature threshold of the battery core, the current gear is reduced to obtain a target gear as a first gear, the operation strategy corresponding to the first gear is determined to comprise starting an air inlet fan, and the duty ratio of the air inlet fan is adjusted to be a first preset duty ratio. When the electric energy transmission power is larger than a second power threshold, the second temperature is smaller than a first temperature threshold of the maximum power point tracking plate, and the temperature of the battery core is smaller than or equal to a fifth temperature threshold of the battery core, the current gear is reduced to obtain a target gear which is a second gear, the operation strategy corresponding to the second gear is determined to comprise starting an air inlet fan and an air outlet fan, and the duty ratio of the air inlet fan and the duty ratio of the air outlet fan are adjusted to be a first preset duty ratio.
Referring to fig. 5, fig. 5 is a flowchart illustrating a control method of a heat dissipating device according to another embodiment of the present application.
As shown in fig. 5, the control method of the heat dissipating device includes steps S301 to S304.
Step S301, obtaining the power transmission power of the energy storage power supply, and obtaining the current temperature of each power conversion plate, the temperature of the battery core in the battery module, and the current gear of the heat dissipating device.
The electric power transmission power may include a charging power and a discharging power, among others. The power conversion board may include a maximum power point tracking MPPT board and a power conditioning circuit PSDR board. The energy storage power supply mainly carries out power conversion through the PSDR board, so that the battery core supplies power to a load or an external power supply charges the battery core. The MPPT board is used for carrying out maximum power tracking on electric energy input by the accessed photovoltaic board, and charging the battery cell or supplying power to a load accessed to the energy storage power supply. The two plates have higher power consumption, are easy to generate higher heat, and belong to core devices, and need to dissipate heat in time.
In step S302, when the power transmission power is the charging power, if the charging power is less than the first power threshold or the maximum temperature value of all temperatures is less than the first maximum temperature threshold, determining that the operation strategy of the heat dissipating device is not to start the heat dissipating device.
All the temperatures comprise the current temperature of each power conversion plate and the temperature of the battery cell in the battery module. If the charging power is smaller than the first power threshold or the maximum temperature value of all temperatures is smaller than the first maximum temperature threshold, the energy storage power supply does not need to turn on the heat dissipation device. Therefore, the operation strategy of the heat dissipating device can be determined to be that the heat dissipating device is not started, so that the situation that the fan is still started under the condition that the heat dissipating device such as the fan is not started is avoided, noise caused by the heat dissipating device such as the fan can be reduced, and energy can be saved.
In an embodiment, if the current gear of the heat dissipating device is zero, determining the upshift operation strategy of the fan includes not turning on the fan when the charging power of the energy storage power supply is less than or equal to the first charging power threshold value, or when the current temperature of the power conversion plate is less than or equal to the first temperature threshold value of the power conversion plate.
In an embodiment, if the current gear of the heat dissipating device is the first gear, determining the operation strategy of the fan includes stopping the fan when the charging power of the energy storage power supply is less than or equal to the first charging power threshold and the current temperature of the power conversion plate is less than or equal to the first temperature threshold of the power conversion plate, or when the current temperature of the power conversion plate is less than or equal to the first temperature threshold of the power conversion plate and the temperature of the battery cell is less than or equal to the third temperature threshold of the battery cell. The third temperature threshold of the battery cell is smaller than the first temperature threshold of the battery cell.
In step S303, when the power transmission power is the discharge power, if the discharge power is less than the second power threshold or the maximum temperature value of all temperatures is less than the second maximum temperature threshold, determining that the operation strategy of the heat dissipating device is not to start the heat dissipating device.
If the discharge power is smaller than the second power threshold or the maximum temperature value of all temperatures is smaller than the second maximum temperature threshold, it is also indicated that the energy storage power supply does not need to turn on the heat dissipation device. Therefore, the running strategy of the heat dissipating device can be determined to be that the heat dissipating device is not started, so that noise brought by the heat dissipating device such as a fan is reduced, and electric energy waste is avoided.
The second power threshold is smaller than the first power threshold. When the electric energy transmission power is the discharge power, the energy storage power supply is in a discharge state, and the heat energy released by the energy storage power supply in the discharge state is larger than the heat energy released by the energy storage power supply in the charge state, so that the heat dissipation device is not required to be started when the discharge power is smaller than a second power threshold value, and the noise problem caused by the fan can be reduced on the basis of ensuring the corresponding heat dissipation.
The second maximum temperature threshold is greater than the first maximum temperature threshold. Because the heat energy released by the energy storage power supply in the discharging state is larger than the heat energy released by the energy storage power supply in the charging state, the temperature of the energy storage power supply in the discharging state is raised faster, and the heat dissipation device can be determined not to be started when the maximum temperature value of all the temperatures is smaller than the second maximum temperature threshold value, so that the problem that excessive noise is generated when the fan is started is avoided, and the noise problem caused by the fan can be reduced on the basis of ensuring the corresponding heat dissipation capability.
In an embodiment, if the current gear of the heat dissipating device is zero, determining the operation strategy of the fan includes not turning on the fan when the discharge power of the energy storage power supply is less than or equal to the first discharge power threshold, or when the current temperature of the power conversion plate is less than or equal to the first temperature threshold of the power conversion plate.
In an embodiment, if the current gear of the heat dissipating device is the first gear, determining the operation strategy of the fan includes stopping the fan when the discharge power of the energy storage power supply is less than or equal to the first discharge power threshold, the current temperature of the power conversion plate is less than or equal to the third temperature threshold of the power conversion plate, and the temperature of the battery cell is greater than the fifth temperature threshold of the battery cell and less than or equal to the sixth temperature threshold of the battery cell.
Step S304, a heat dissipation control signal is generated according to the operation strategy of the heat dissipation device, and the heat dissipation control signal is sent to the heat dissipation device to control the operation state of each fan in the heat dissipation device.
It should be noted that, the heat dissipation control signal is used for controlling the heat dissipation device to operate according to the operation strategy that the heat dissipation device is not started, so that the heat dissipation device does not start the fans when the heat dissipation function is not required to be provided, and noise generated by each fan is avoided.
In the control method of the heat dissipating device provided in the above embodiment, when the power of the electric energy transmission is the charging power, if the charging power is smaller than the first power threshold or the maximum temperature value of all temperatures is smaller than the first maximum temperature threshold, determining that the operation policy of the heat dissipating device is not to start the heat dissipating device; when the electric energy transmission power is the discharge power, if the discharge power is smaller than the second power threshold or the maximum temperature value of all temperatures is smaller than the second maximum temperature threshold, determining that the operation strategy of the heat dissipating device is to not start the heat dissipating device, so that the heat dissipating device does not start the fans when the heat dissipating function is not required to be provided, and noise generated by each fan is avoided.
In an embodiment, a control method of the heat dissipating device according to the embodiment of the present application is further explained by way of a specific example. The charging power of the energy storage power supply is P1, the discharging power is P2, the current temperature of the MPPT plate is mppt_ntc, the current temperature on the PSDR plate is psdr_ntc, the cell temperature is a cell NTC, and a maximum value of the cell temperature (cell ntc_max) is obtained according to each cell temperature (cell NTC).
In a first aspect, the following details the upshift logic of the fan during charging of the energy storage power supply:
1. If either of the following two conditions is satisfied, the electric fan is not started, the target gear is zero gear, and the duty ratio of the heat dissipation control signal is 0.
(1) The charging power P1 is less than or equal to a first charging power threshold (500W-600W).
(2) The maximum temperature value Tmax (hereinafter referred to as Tmax) of all the temperatures NTC (MPPT_NTC, PSDR_NTC or cell NTC) is +.ltoreq.a first charging temperature threshold (30 ℃).
The current charging power P1 is smaller than the first charging power threshold, and is not high-power charging, and heat accumulation cannot be easily caused, so that whether an upshift is needed is judged through the charging power, or whether the temperature of the current MPPT plate and the PSDR plate is higher than the first charging temperature threshold is concerned, and the heat dissipation is needed on the MPPT plate and the PSDR plate due to the fact that the nature of cooling is important.
2. When the current gear is zero, determining that the target gear is first gear if any one of the following three conditions is met, starting an air inlet fan, and enabling the duty ratio of a heat dissipation control signal to be a first duty ratio (0.31-0.39).
(1) The first charging power threshold value (500W-600W) < the charging power P1 is less than or equal to the second charging power threshold value (1350W-1450W), and Tmax > the third charging temperature threshold value (50 ℃).
(2) A first temperature threshold value (79-81 ℃) of the PSDR plate < PSDR_NTC is less than or equal to a second temperature threshold value (92-94 ℃) of the PSDR plate;
(3) A first temperature threshold value (59-61 ℃) of the MPPT plate and a second temperature threshold value (87-89 ℃) of the MPPT_NTC which is less than or equal to the MPPT plate.
When the charging power increases, heat tends to accumulate, but this does not necessarily lead to an increase in the temperature of the MPPT plate and the PSDR plate, and it is necessary to determine the actual temperature of the MPPT plate and the PSDR plate. If the current MPPT board and PSDR board have high temperature, the first air is required to be directly started for cooling, and the condition judgment of charging power is not required to be considered.
In addition, in the judgment of the first wind, the temperature judgment range of the PSDR board is slightly higher than the temperature judgment range of the MPPT board, because the temperature threshold of the PSDR board is higher, and the heat dissipation condition of the components of the PSDR board is better and more resistant to heat. In this embodiment, the air channels of the heat dissipating device mostly dissipate heat from the PSDR panel, and only a small portion of the air channels are provided to the MPPT panel.
3. When the current gear is the first gear, any one of the following four conditions is met, the target gear is determined to be the second gear, the air inlet fan is started, the air outlet fan is started, and the duty ratio of the heat dissipation control signal is the second duty ratio (0.41-0.49).
(1) Charging power P1> second charging power threshold (1350W to 1450W) and Tmax > third charging temperature threshold (50 ℃);
(2) Second temperature threshold of PSDR plate (92-94 ℃) < PSDR_NTC < third temperature threshold of PSDR plate (96-98 ℃);
(3) the first temperature threshold value (39-41 ℃) of the battery cell is less than or equal to the second temperature threshold value (46-47 ℃) of the battery cell, NTC_max of the battery cell is less than or equal to the second temperature threshold value (46-47 ℃) of the battery cell, and the charging power is more than the fourth charging power (800W);
(4) second temperature threshold of MPPT plate (87 ℃ -89 ℃) < MPPT_NTC.
When the charging power P1 is higher than the second charging power (higher), it means that the power conversion at this time requires high power conversion, and heat accumulation is more likely to occur, and the temperature of the battery cell is more likely to be over-heated. At the moment, whether the second-gear fan needs to be started for cooling is judged through the charging power or the PSDR and the temperature on the MPPT board, the judgment on the temperature of the battery cell can be increased, the four judgment conditions are interrelated, and any condition can be met for control.
4. When the current gear is the second gear, the target gear is determined to be the third gear if any one of the following two conditions is met, the air inlet fan is started, the air outlet fan is started, and the duty ratio of the heat dissipation control signal is the third duty ratio (0.61-0.69).
(1) The charging power P1 is greater than a third charging power threshold (750W-850W), and the PSDR_NTC is greater than or equal to a fourth temperature threshold (99 ℃ to 101 ℃) of the PSDR plate;
(2) The charging power P1 is greater than a third charging power threshold (750W-850W), and the battery cell NTC_max is greater than or equal to a second temperature threshold (46-47 ℃) of the battery cell.
When the temperature of the battery core is lower than a first temperature threshold value of the battery core, the environment temperature is not very high, and the energy storage power supply can be cooled by directly utilizing the environment through first-grade wind even without starting a fan. When the temperature of the battery cell is higher than that of the first battery cell, the current environment temperature is not enough to timely dissipate heat of the current energy storage power supply, and the gear of the fan is required to be increased so as to prevent the battery cell from being over-heated and damage the battery cell. The temperature of the battery cell in the charging process is generally in the range of 0-48 ℃.
In a second aspect, the following details the power storage power supply during charging, the fan's downshift logic:
1. when the current gear is the first gear, if any one of the following two conditions is met, the target gear is determined to be the zero gear, the fan is not started, and the duty ratio of the heat dissipation control signal is 0.
(1) PSDR_NTC < fifth temperature threshold (59-61 ℃) of PSDR plate, and charging power < first charging power threshold (500-600W) and MPPT_NTC < first temperature threshold (59-61 ℃) of MPPT plate;
(2) the battery cell NTC is less than or equal to the third temperature threshold (35-37 ℃) of the battery cell, the PSDR_NTC is less than the first temperature threshold (60 ℃) and the MPPT_NTC is less than the third temperature threshold (49-51 ℃) of the MPPT plate.
2. When the current gear is the second gear, the following condition is met, the target gear is determined to be the first gear, the air inlet fan is only kept on, and the duty ratio of the heat dissipation control signal is the first duty ratio (0.31-0.39).
(1) PSDR_NTC is smaller than a first temperature threshold (79-81 ℃) of the PSDR plate, a first charging power threshold (500-600W) < charging power is smaller than a second charging power threshold (1350-1450W), MPPT_NTC is smaller than a fourth temperature threshold (64-66 ℃) of the MPPT plate, and the battery cell NTC_max is smaller than or equal to a fourth temperature threshold (38-39 ℃) of the battery cell.
3. When the current gear is the third gear, the target gear is determined to be the second gear if the following conditions are met, the air inlet fan is started, the air outlet fan is started at the same time, and the duty ratio of the heat dissipation control signal is the second duty ratio (0.41-0.49).
(1) If PSDR_NTC is less than the first temperature threshold (79-81 ℃) of PSDR plate, and the charging power is greater than the second charging power threshold (1350-1450W), and the cell NTC_max is less than the fifth temperature threshold (44-45 ℃) of the cell.
In a third aspect, the following details the upshift logic of the fan during discharge of the energy storage power supply:
1. if either of the following two conditions is satisfied, the electric fan is not started, the target gear is zero gear, and the duty ratio of the heat dissipation control signal is 0.
(1) The discharge power P2 is less than or equal to a first discharge power threshold (160W-240W).
(2) The maximum temperature value Tmax (hereinafter referred to as Tmax) among all NTCs (MPPT_NTC, PSDR_NTC) is +.ltoreq.a first discharge temperature threshold (50 ℃). If any one of the two conditions is met, the electric fan is not started, and the current speed is zero.
In the discharging process, if the discharging power P2 is smaller than the first discharging power threshold value, the current is considered to be the light load of the belt, and under the condition of the light load of the belt, the temperature of the battery core usually does not generate heat accumulation to cause the damage of the battery core, so that the temperature of the battery core does not need to be considered at the moment, and only the discharging power and the temperatures on the MPPT board and the PSDR board need to be concerned. Therefore, the judgment of the discharge power is different from the charge power.
2. When the current gear is zero, determining that the target gear is first gear if any one of the following three conditions is met, starting an air inlet fan, and enabling the duty ratio of a heat dissipation control signal to be a first duty ratio (0.31-0.39).
(1) A first discharge power threshold (160W-240W) < discharge power P2< second discharge power threshold (1560W-1640W), and Tmax > a first discharge temperature threshold (50 ℃);
(2) a fifth temperature threshold value (59-61 ℃) of the PSDR plate < PSDR_NTC is less than or equal to a sixth temperature threshold value (77-78 ℃) of the PSDR plate;
(3) First temperature threshold of MPPT plate (59-61 ℃) < MPPT_NTC < fifth temperature threshold of MPPT plate (94-96 ℃).
When discharging, the temperature of the PSDR plate reaches the fifth temperature threshold value of the PSDR plate, namely the first air-blocking (59-61 ℃) is started, and compared with the charging, the first air-blocking is started when the temperature of the PSDR plate reaches the first temperature threshold value (79-81 ℃) of the PSDR plate, because in the discharging process, the first air-blocking can be started in advance to dissipate heat in consideration of the fact that the temperature of the battery cell is easier to over-heat, and at the moment, the judgment of the temperature of the battery cell is not needed to be added, so that the judgment logic is prevented from being too complex.
3. When the current gear is the first gear, any one of the following four conditions is met, the target gear is determined to be the second gear, the air inlet fan is started, the air outlet fan is started, and the duty ratio of the heat dissipation control signal is the second duty ratio (0.41-0.49).
(1) If the second discharge power threshold (1560W-1640W) is less than or equal to the discharge power and Tmax is greater than the first discharge temperature threshold (50 ℃); or alternatively;
(2) a sixth temperature threshold value (77-78 ℃) of the PSDR plate < PSDR_NTC is less than or equal to a seventh temperature threshold value (84-86 ℃) of the PSDR plate; or alternatively;
(3) the fifth temperature threshold (44-45 ℃) of the battery cell is less than or equal to the NTC_max of the battery cell, which is less than the sixth temperature threshold (51-53 ℃) of the battery cell, and the discharge electric power is more than the third discharge power threshold (760-840W); or alternatively;
(4) And the fifth temperature threshold (94-96 ℃) of the MPPT plate is less than or equal to MPPT_NTC, and the second-gear fan is started.
4. When the current gear is the second gear, the target gear is determined to be the third gear if any one of the following two conditions is met, the air inlet fan is started, the air outlet fan is started, and the duty ratio of the heat dissipation control signal is the third duty ratio (0.61-0.69).
(1) If the seventh temperature threshold value of the PSDR plate (84 ℃ to 86 ℃) is < PSDR_NTC < the eighth temperature threshold value of the PSDR plate (105 ℃ to 107 ℃);
(2) the third discharge power threshold (760W-840W) < discharge power, and the sixth temperature threshold (51-53 ℃) of the battery cell is less than or equal to the NTC_max of the battery cell and is less than or equal to the seventh temperature threshold (56-58 ℃) of the battery cell.
5. When the current gear is the third gear, determining that the target gear is the fourth gear if any one of the following two conditions is met, starting the air inlet fan and simultaneously starting the air outlet fan, wherein the duty ratio of the heat dissipation control signal is the fourth duty ratio (1200).
(1) If the eighth temperature threshold (105-107 ℃) of the PSDR plate is less than or equal to PSDR_NTC;
(2) the third discharge power threshold (760W-840W) < discharge power, and the seventh temperature threshold (56-58 ℃) of the battery cell is less than or equal to the battery cell NTC_max.
Similar to the up-shift logic in the charging process, the temperature range of the battery core in the discharging process is generally-20 ℃ to 63 ℃, and the fan control of the fourth gear is generally not triggered.
In a fourth aspect, the following details the downshift logic of the fan during discharge of the energy storage power supply:
1. when the current gear is the first gear, the following conditions are met, the target gear is determined to be reduced to the zero gear, the fan is not started, and the duty ratio of the heat dissipation control signal is 0.
(1) The discharge power is less than or equal to a first discharge power threshold (160W-240W), PSDR_NTC is less than a ninth temperature threshold (49-51 ℃) of the PSDR plate, MPPT_NTC is less than or equal to a third temperature threshold (49-51 ℃) of the MPPT plate, and battery cell_NTC is less than or equal to a fifth temperature threshold (44-45 ℃) of the battery cell.
2. When the current gear is the second gear, one of the following three conditions is met, the target gear is determined to be the first gear, the air inlet fan is only kept on, and the duty ratio of the heat dissipation control signal is the first duty ratio (0.31-0.39).
(1) Psdr_ntc < tenth temperature threshold (67 ℃ to 69 ℃) of PSDR panel, and first discharge power threshold (160W to 240W) < discharge power < second discharge power threshold (1560W to 1640W);
(2) a fifth temperature threshold value (44-45 ℃) of the battery cell < a sixth temperature threshold value (51-53 ℃) of the battery cell NTC_max < the battery cell, and a first discharge power threshold value (160-240W) < discharge power less than or equal to a third discharge power threshold value (660-740W);
(3) The sixth temperature threshold (54-56 ℃) of the MPPT plate is less than or equal to the fourth temperature threshold (64-66 ℃) of the MPPT_NTC is less than or equal to the MPPT plate.
3. When the current gear is the third gear, the target gear is determined to be the second gear if the following conditions are met, the air inlet fan is started, the air outlet fan is started at the same time, and the duty ratio of the heat dissipation control signal is the second duty ratio (0.41-0.49).
(1) PSDR_NTC < eleventh temperature threshold (71-73 ℃) of PSDR plate, and discharge power > second discharge power threshold (1560W-1640W), and cell NTC_max < eighth temperature threshold (48-49 ℃) of cell.
4. When the current gear is the fourth gear, the following condition is met, the target gear is determined to be the third gear, the air inlet fan is started, the air outlet fan is started, and the duty ratio of the heat dissipation control signal is the third duty ratio (0.61-0.69).
(1) PSDR_NTC < twelfth temperature threshold (89-91 ℃) of PSDR plate, and discharge power > second discharge power threshold (1560W-1640W), and cell NTC_max < ninth temperature threshold (54-55 ℃) of cell.
Through tests, when a user uses the energy storage power supply, most of the use scenes are that the fan is placed in the second gear, the noise is very low, the very few cases or extreme cases can reach the third gear and the fourth gear, and compared with the fan starting logic in the traditional technology, the noise reduction effect brought by the scheme is very obvious.
Referring to fig. 6, fig. 6 is a schematic block diagram of an energy storage power supply according to an embodiment of the application.
As shown in fig. 6, the energy storage power supply 400 includes: a control device 410, a battery module 420, a heat sink 430, and at least one power conversion plate 440; the heat sink 430 includes at least one fan; at least one power conversion board 440 includes a corresponding power conversion circuit for converting the dc power output from the battery module 420 and outputting the converted dc power; the heat dissipation device 430 is used for dissipating heat inside the energy storage power supply 400. The control device 410 is respectively connected with the power conversion plate 440 and the heat dissipation device 430; the control device 410 is configured to execute a control method of the heat dissipating device according to any one of the embodiments of the present application.
It will be appreciated by those skilled in the art that the structure shown in fig. 6 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the stored energy power source 400 to which the present inventive arrangements are applied, and that a particular stored energy power source 400 may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
Wherein the stored energy power supply 400 may be used to power an electronic device. The electronic device may be, for example, electric equipment such as a home air conditioner, an outdoor air conditioner, a washing machine, a water heater, and a mower. In some embodiments, the stored energy power source 400 may be the stored energy power source 100 of the previous embodiments.
It should be noted that, for convenience and brevity of description, the specific working process of the energy storage power supply 400 described above may refer to the corresponding process in the foregoing embodiment of the control method of the heat dissipation device, and will not be described herein.
The embodiment of the application also provides a storage medium for computer readable storage, wherein the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to realize the steps of the method for controlling the heat dissipating device according to any one of the embodiments of the application.
The storage medium may be an internal storage unit in the energy storage power supply according to the foregoing embodiment, for example, a hard disk or a memory of the control device. The storage medium may also be an external storage device of the energy storage power supply, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the energy storage power supply.
Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present application without departing from the spirit and scope of the technical solution of the present application.

Claims (10)

1. The control method of the heat dissipating double-fuselage, characterized by that, apply to the energy storage power; the energy storage power supply comprises a battery module, the heat dissipation device and at least one power conversion plate; the heat dissipation device comprises at least one fan; the at least one power conversion plate comprises a corresponding power conversion circuit for converting and outputting the direct current output by the battery module; the heat dissipation device is used for dissipating the internal heat of the energy storage power supply; the control method comprises the following steps:
acquiring the electric energy transmission power of the energy storage power supply, and acquiring the current temperature of each power conversion plate, the temperature of the battery cell in the battery module and the current gear of the heat dissipation device;
determining an operation strategy of the heat dissipation device according to the current gear, the electric energy transmission power, the current temperature of each power conversion plate and the battery core temperature; different operation strategies correspond to different fan operation states;
and generating a heat dissipation control signal according to the operation strategy of the heat dissipation device, and sending the heat dissipation control signal to the heat dissipation device so as to control the operation state of each fan in the heat dissipation device.
2. The control method according to claim 1, wherein the determining the operation strategy of the heat sink according to the current gear, the electric power transmission power, the current temperature of each of the power conversion boards, and the battery cell temperature includes:
if the power transmission power, the current temperature of each power conversion plate or the temperature of the battery cell meets an upshift condition, adding one to the current gear to obtain a target gear;
if the power transmission power, the current temperature of each power conversion plate and the temperature of the battery cell meet the downshift condition, a target gear is obtained according to the current gear by one step;
and determining an operation strategy corresponding to the heat dissipation device according to the target gear.
3. The control method according to claim 2, wherein the upshift condition includes at least one condition of a power condition, a maximum temperature condition, a temperature condition of each power conversion plate, and a cell temperature condition;
the downshift condition includes at least two of a power condition, a maximum temperature condition, a temperature condition of each power conversion plate, and a cell temperature condition.
4. The control method according to claim 2, characterized in that the electric energy transmission power includes a charging power and a discharging power;
If the electric energy transmission power is charging power, the maximum value of the target gear is a first value;
if the electric energy transmission power is the discharge power, the maximum value of the target gear is a second value;
wherein the second value is greater than the first value.
5. A control method according to claim 2 or 3, wherein the heat sink comprises at least one air intake fan and at least one air outlet fan; the determining a corresponding operation strategy according to the target gear comprises the following steps:
when the target gear is lower than a preset gear, determining that the air inlet fan or the air outlet fan of the heat radiating device is a working fan; the preset gear is a gear larger than zero;
and when the target gear is equal to or higher than the preset gear, determining all fans of the heat dissipation device to be working fans.
6. The control method according to claim 5, wherein the determining the corresponding operation strategy according to the target gear further includes:
when the target gear is lower than a preset gear, determining the rotating speed parameter of the working fan as a first preset value;
when the target gear is higher than or equal to the preset gear, determining that the rotating speed parameter of the working fan is a second preset value, wherein the magnitude of the second preset value and the target gear are in positive correlation;
Wherein the second preset value is greater than the first preset value.
7. The control method according to claim 6, wherein the rotation speed parameter includes a duty ratio of a driving signal that drives the operating fan; the first preset value is a first preset duty cycle; the second preset value is a second preset duty cycle.
8. The control method according to claim 1, characterized in that the electric energy transmission power includes a charging power and a discharging power; the determining an operation strategy of the heat dissipating device according to the current gear, the power of the power transmission, the current temperature of each power conversion board and the temperature of the battery cell includes:
when the electric energy transmission power is charging power, if the charging power is smaller than a first power threshold or the maximum temperature value of all temperatures is smaller than a first maximum temperature threshold, determining that the operation strategy of the heat dissipation device is not to start the heat dissipation device;
when the electric energy transmission power is the discharge power, if the discharge power is smaller than a second power threshold or the maximum temperature value of all temperatures is smaller than a second maximum temperature threshold, determining that the operation strategy of the heat dissipating device is not to start the heat dissipating device;
Wherein the second power threshold is less than the first power threshold; and/or the second maximum temperature threshold is greater than the first maximum temperature threshold.
9. The energy storage power supply is characterized by comprising a control device, a battery module, a heat dissipation device and at least one power conversion plate; the heat dissipation device comprises at least one fan; the at least one power conversion plate comprises a corresponding power conversion circuit for converting and outputting the direct current output by the battery module; the heat dissipation device is used for dissipating the internal heat of the energy storage power supply; the control device is respectively connected with the power conversion plate and the heat dissipation device; the control device is configured to execute the control method according to any one of claims 1 to 8.
10. A storage medium for computer-readable storage, characterized in that the storage medium stores one or more computer programs executable by one or more processors to implement the control method of any one of claims 1 to 8.
CN202310892659.1A 2023-07-19 2023-07-19 Control method of heat dissipating device, energy storage power supply and storage medium Pending CN117039274A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117979666A (en) * 2024-04-02 2024-05-03 珠海格力电器股份有限公司 Control method and device of cooling fan, air conditioning unit, readable storage medium and electronic equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117979666A (en) * 2024-04-02 2024-05-03 珠海格力电器股份有限公司 Control method and device of cooling fan, air conditioning unit, readable storage medium and electronic equipment

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