CN116381163B - Humidity detection method and device, electronic equipment and storage medium - Google Patents

Humidity detection method and device, electronic equipment and storage medium Download PDF

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CN116381163B
CN116381163B CN202310612666.1A CN202310612666A CN116381163B CN 116381163 B CN116381163 B CN 116381163B CN 202310612666 A CN202310612666 A CN 202310612666A CN 116381163 B CN116381163 B CN 116381163B
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current
dew point
humidity
interval
target space
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CN116381163A (en
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王德会
汤敏
彭克来
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
    • G01N25/66—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point
    • G01N25/68—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point by varying the temperature of a condensing surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The application discloses a humidity detection method, a humidity detection device, electronic equipment and a storage medium. The humidity detection method comprises the following steps: acquiring the current ambient temperature and the current dew point temperature of the target space; obtaining the current water vapor pressure of the target space according to the current ambient temperature; and obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure. The humidity detection method provided by the embodiment of the application can improve the accuracy of the humidity detection result.

Description

Humidity detection method and device, electronic equipment and storage medium
Technical Field
The application relates to the technical field of environment detection, in particular to a humidity detection method, a humidity detection device, electronic equipment and a storage medium.
Background
Ambient humidity is one of the factors affecting battery performance, and thus, it is generally required to perform humidity detection on a target space where batteries are produced or stored, such as a production factory of batteries or a transfer cabinet where batteries are stored, so as to perform targeted adjustment on the target space based on the detected ambient humidity.
Currently, detection of ambient humidity is achieved by electronic humidity sensors. However, since the electronic humidity sensor is a vulnerable component, a situation that the humidity detection error is high is easy to occur due to the damage of the electronic humidity sensor, so that the humidity detection result obtained by using the electronic humidity sensor cannot meet the detection precision requirement of the target space.
Disclosure of Invention
In view of the above, the present application provides a humidity detection method, a device, an electronic apparatus, and a storage medium, which can improve the accuracy of a humidity detection result.
In a first aspect, the present application provides a humidity detection method, the method comprising: acquiring the current ambient temperature and the current dew point temperature of the target space; obtaining the current water vapor pressure of the target space according to the current ambient temperature; and obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure.
In the technical scheme of the embodiment of the application, the current relative humidity of the target space is obtained through the current dew point temperature of the target space and the current vapor pressure of the target space determined according to the current ambient temperature, so that the relative humidity of the target space is not required to be detected through the electronic humidity sensor, the situation that the humidity detection error is high due to the damage of the electronic humidity sensor or the decline of the precision of the electronic humidity sensor is avoided, and the accuracy of the humidity detection result is improved.
In some embodiments, the acquiring the current ambient temperature and the current dew point temperature of the target space comprises: and determining that a battery exists in the target space, and acquiring the current ambient temperature and the current dew point temperature of the target space. Under the condition that a battery exists in the target space, the current ambient temperature and the current dew point temperature of the target space are acquired again to carry out humidity detection, and the operation resource waste in the humidity detection process is reduced.
In some embodiments, the obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure includes: and determining that the current dew point temperature is in a preset dew point interval, and obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure. Therefore, the high-precision detection of the relative humidity can be performed for the change interval of a certain dew point temperature by setting the preset dew point interval, so that the calculation of the relative humidity is not required for all the dew point temperatures, and the calculation of the relative humidity is only required for a specific dew point interval, so that the detection of the relative humidity is more targeted.
In some embodiments, further comprising: and obtaining the preset dew point interval at any one of the environmental temperatures according to the endpoint value of the preset humidity interval and any one of the environmental temperatures. The preset dew point interval under any ambient temperature is obtained through the endpoint value of the preset humidity interval and any ambient temperature, so that the high-precision detection of the relative humidity can be performed in the change interval of a certain relative humidity by setting the preset humidity interval, and the pertinence of the detection of the relative humidity is further improved.
In some embodiments, the obtaining the preset dew point interval at any one of the environmental temperatures according to the endpoint value of the preset humidity interval and any one of the environmental temperatures includes: and inputting the end point value of the preset humidity interval and any environmental temperature into a logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity to obtain the preset dew point interval at any environmental temperature. Therefore, when the preset dew point interval needs to be determined, the storage pressure and the data query pressure are reduced without being determined by searching the data table, and meanwhile, the situation that the preset dew point interval cannot be obtained by searching the data table is reduced, and the acquisition efficiency of the preset dew point interval is improved. In addition, the preset dew point interval is determined through the constructed logarithmic function model, so that the obtained preset dew point interval at any ambient temperature can be more accurate.
In some embodiments, further comprising: and determining the preset humidity interval according to at least one of the space information of the target space or the product information of the battery in the target space. Therefore, a preset humidity interval which influences the battery performance can be obtained, when the obtained current dew point temperature is in the preset dew point interval determined by the preset humidity interval, the current relative humidity of the target space is determined by utilizing the current dew point temperature, and then the relative humidity which influences the battery performance can be monitored in a targeted manner, so that the validity of the relative humidity detection is improved.
In some embodiments, the maximum value of the preset humidity interval is determined according to the drift amount of the target device for measuring the relative humidity. The maximum value of the preset humidity interval is determined by measuring the drift amount of target equipment of the relative humidity, so that the humidity interval which cannot be detected by the electronic humidity sensor can be detected by utilizing the current dew point temperature and the vapor pressure. And further, the coverage of the detection of the relative humidity is larger, and meanwhile, the detection precision of the relative humidity is improved.
In some embodiments, the obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure includes: and inputting the current dew point temperature and the current water vapor pressure into a logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity, and obtaining the current relative humidity of the target space. Therefore, when the current relative humidity of the target space needs to be determined, the storage pressure and the data query pressure are reduced without being determined by searching the data table, and meanwhile, the situation that the current relative humidity of the target space cannot be obtained by searching the data table is reduced, and the acquisition efficiency of the current relative humidity is improved.
In some embodiments, the logarithmic function model comprisesThe method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>The dew point temperature is represented by E, the water vapor pressure determined from the ambient temperature, U, the relative humidity, and b and c, respectively. Therefore, the preset dew point interval and the current relative humidity of the target space obtained by using the logarithmic function model are more accurate.
In a second aspect, the present application provides a humidity detection apparatus comprising: the data acquisition module is used for acquiring the current ambient temperature and the current dew point temperature of the target space; the data processing module is used for obtaining the current water vapor pressure of the target space according to the current environment temperature; and the humidity detection module is used for obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure.
In the technical scheme of the embodiment of the application, the current relative humidity of the target space is obtained through the current dew point temperature of the target space and the current vapor pressure of the target space determined according to the current ambient temperature, so that the relative humidity of the target space is not required to be detected through the electronic humidity sensor, the situation that the humidity detection error is high due to the damage of the electronic humidity sensor or the decline of the precision of the electronic humidity sensor is avoided, and the accuracy of the humidity detection result is improved.
In some embodiments, the data acquisition module is specifically configured to: and determining that a battery exists in the target space, and acquiring the current ambient temperature and the current dew point temperature of the target space.
In some embodiments, the humidity detection module is specifically configured to: and determining that the current dew point temperature is in a preset dew point interval, and obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure.
In some embodiments, the humidity detection module is further to: and obtaining the preset dew point interval at any one of the environmental temperatures according to the endpoint value of the preset humidity interval and any one of the environmental temperatures.
In some embodiments, the humidity detection module is specifically configured to: and inputting the end point value of the preset humidity interval and any environmental temperature into the logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity to obtain the preset dew point interval at any environmental temperature.
In some embodiments, the humidity detection module is further to: and determining the preset humidity interval according to at least one of the space information of the target space or the product information of the battery in the target space.
In some embodiments, the maximum value of the preset humidity interval is determined according to the drift amount of the target device for measuring the relative humidity.
In some embodiments, the humidity detection module is specifically configured to: and inputting the current dew point temperature and the current water vapor pressure into the logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity to obtain the current relative humidity of the target space.
In some embodiments, the logarithmic function model comprisesThe method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>The dew point temperature is represented by E, the water vapor pressure determined from the ambient temperature, U, the relative humidity, and b and c, respectively.
In a third aspect, the present application provides an electronic device comprising a memory storing a computer program and a processor executing the method in an implementation of the first aspect when the computer program is executed.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the method in an implementation of the first aspect.
In a fifth aspect, the present application provides a computer program product which, when run on a computer, causes the computer to perform the method of any of the optional implementations of the first aspect or the third aspect or any optional implementation of the third aspect.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
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Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:
FIG. 1 is a first flowchart of a humidity detection method according to some embodiments of the present application;
FIG. 2 is a graph showing the trend of changes in relative humidity according to some embodiments of the present application;
FIG. 3 is a schematic diagram of a humidity detection apparatus according to some embodiments of the present disclosure;
fig. 4 is a schematic structural diagram of an electronic device according to some embodiments of the present application.
Reference numerals in the specific embodiments are as follows:
201-a data acquisition module; 202-a data processing module; 203-a humidity detection module; 300-an electronic device; 301-a processor; 302-memory; 303-communication bus.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).
Ambient humidity is one of the factors affecting battery performance, and therefore, it is generally required to perform humidity detection on a target space where batteries are produced or stored, such as a ternary system factory building where batteries are produced and a transfer cabinet where batteries are stored/transported, so as to perform targeted adjustment on the environment of the target space based on the detected ambient humidity, so as to reduce the influence of the ambient humidity on battery performance.
Currently, detection of ambient humidity is achieved by electronic humidity sensors. The humidity sensor has a humidity sensor with a humidity sensor element, wherein the humidity sensor has a resistance type and a capacitance type, and when water vapor in air is adsorbed on a humidity sensor film, the resistance and the resistance value of the resistance type are changed, and the humidity sensor can measure humidity by utilizing the characteristic. Capacitance is proportional to relative humidity when the humidity environment changes, and humidity measurement can be performed by utilizing the characteristic. However, since the electronic humidity sensor is a wearing part, there is a demand for the ambient temperature of use, and if the electronic humidity sensor is not at a predetermined ambient temperature, a humidity detection error is liable to be high due to damage of the electronic humidity sensor. And the conventional electronic humidity sensor is susceptible to precision degradation due to the influence of dust, greasy dirt and harmful gases. In addition, the accuracy of the electronic humidity sensor is generally about 2% rh (relative humidity) to 3% rh, that is, the accuracy of detecting the humidity of the electronic humidity sensor has a relative humidity error of ±2%, but the accuracy of detecting the humidity of the target space of the battery production battery or the storage battery is required to be higher, so that the accuracy of detecting the humidity of the target space by using the electronic humidity sensor cannot be satisfied.
Aiming at the technical problems, the embodiment of the application provides a humidity detection method, which obtains the current relative humidity of a target space through the current dew point temperature of the target space and the current vapor pressure of the target space determined according to the current environment temperature, so that the relative humidity of the target space is not required to be detected through an electronic humidity sensor, the situation that the humidity detection error is higher due to the damage of the electronic humidity sensor or the decline of the precision of the electronic humidity sensor is avoided, and the accuracy of a humidity detection result is improved.
The humidity detection method, the humidity detection device, the electronic equipment and the storage medium disclosed by the embodiment of the application can be applied to terminal equipment and are used for realizing the relative humidity detection of a target space. The terminal device may include a server, where the server may be an independent server or a server cluster formed by a plurality of servers, and may also be a cloud server that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDNs, and basic cloud computing services such as big data and artificial intelligent sampling point devices.
According to some embodiments of the present application, a humidity detection method according to an embodiment of the present application may be applied to the foregoing terminal device. As shown in fig. 1, the humidity detection method includes:
s101, acquiring the current ambient temperature and the current dew point temperature of a target space;
s102, obtaining the current water vapor pressure of the target space according to the current environmental temperature;
and S103, obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure.
In some embodiments, the target space may be a space in which the battery is located during production or storage. Such as the space in the production plant of the battery, the space in the transfer cabinet for storing the battery, the space in the battery exchange station for storing the battery, etc. The current temperature of the target space may be acquired by a temperature sensor, such as a thermometer. For example, after the temperature sensor acquires the current temperature of the target space, the current temperature may be uploaded to the terminal device. The dew point temperature is the temperature at which the air is cooled to saturation under the condition that the water vapor content in the air is unchanged and the air pressure is kept constant. The current dew point temperature can be collected by dew point detection equipment, such as a dew point meter, which can utilize vapor to be condensed instantly when the vapor is cooled by a mirror surface, and the light intensity reflected by the mirror surface is suddenly reduced when condensation happens, so that the temperature of the instant condensation surface is measured to be the dew point temperature. Because the current detection precision of the dew point temperature, such as the error of detecting the dew point temperature by using a dew point meter, can reach +/-1% of the dew point temperature or even lower, the detection precision of the electronic humidity sensor is higher than that of the electronic humidity sensor, the error of the relative humidity obtained by using the dew point temperature later can be lower than 2% RH, and the accuracy of a humidity detection result obtained later is improved. And the index requirement on the environment when the dew point temperature and the environment temperature are monitored is lower than the index requirement on the environment when the relative humidity is directly monitored by using the electronic humidity sensor, for example, the environment temperature interval required when the dew point temperature and the environment temperature are monitored is larger than the environment temperature interval required when the relative humidity is directly monitored by using the electronic humidity sensor, so that the precision influence caused by environmental factors is smaller, and the confidence of the detection result is higher.
In some embodiments, after the current ambient temperature and the current dew point temperature are obtained, the current water vapor pressure of the target space can be obtained through the current ambient temperature, for example, the obtained current ambient temperature can be input into an operation model established according to an absolute humidity water vapor pressure calculation formula to obtain the current water vapor pressure of the target space. Illustratively, the operational model may be:
wherein,represents the water vapor pressure; />Represents the water vapor density; a is a constant, such as 1/273.15; />Temperature is expressed in degrees celsius.
After the current water vapor pressure of the target space is obtained, the current relative humidity of the target space can be obtained through the current water vapor pressure and the current dew point temperature. And searching the relative humidity corresponding to the current dew point temperature and the current water vapor pressure from the verified data table recorded with the corresponding relation among the dew point temperature, the water vapor pressure and the relative humidity as the current relative humidity of the target space.
According to the humidity detection method, the current relative humidity of the target space is obtained through the current dew point temperature of the target space and the current water vapor pressure determined by the target space according to the current environment temperature, so that the relative humidity of the target space is not required to be detected through the electronic humidity sensor, and the situation that the humidity detection error is high due to the damage of the electronic humidity sensor is avoided. Meanwhile, because the index requirement on the environment is lower when the temperature is monitored at present than when the relative humidity is directly monitored, the precision influence caused by environmental factors is smaller, and the precision which can be achieved by the detection of the temperature is higher at present, so that the relative humidity obtained by using the dew point temperature and the water vapor pressure is more accurate, and the accuracy of the humidity detection result is improved.
To reduce the waste of computing resources during humidity detection, in some embodiments, obtaining the current dew point temperature of the target space includes:
and determining that a battery exists in the target space, and acquiring the current ambient temperature and the current dew point temperature of the target space.
Under the condition that a battery does not exist in the target space, even if the ambient humidity of the target space does not meet the requirement, the battery performance is not influenced, and the detection of the relative humidity of the target space is not needed. Therefore, it is possible to detect whether or not the battery is present in the target space. The method of detecting whether the battery exists in the target space may be to periodically acquire an image in the target space, so as to determine whether the battery exists in the target space according to the acquired image. Or, it may be to detect whether the indication information sent by the specified terminal, such as the specified terminal bound to the production factory building or the transfer cabinet, is received, where the indication information is used to indicate that the battery has been stored in the target space, so as to determine whether the battery exists in the target space according to whether the indication information sent by the user terminal is received.
If the battery is not present in the target space, the relative humidity of the target space does not affect the performance of the battery, so that the humidity detection of the target space is not required. In contrast, if the battery exists in the target space, the relative humidity of the target space is indicated to affect the performance of the battery, and at this time, the current ambient temperature and the current dew point temperature of the target space are obtained, so that the humidity detection is performed on the target space by using the current ambient temperature and the current dew point temperature.
Under the condition that a battery exists in the target space, the current ambient temperature and the current dew point temperature of the target space are acquired again to carry out humidity detection, and the operation resource waste in the humidity detection process is reduced.
To further save computing resources in the process of detecting the relative humidity, to improve the detection pertinence of the relative humidity, in some embodiments, obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure includes:
and determining that the current dew point temperature is in a preset dew point interval, and obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure.
In some embodiments, a predetermined dew point interval, such as < -34td, may be preset. If the current dew point temperature is outside the dew point interval, if the current dew point temperature is more than or equal to-34 td, the accuracy requirement on the relative humidity corresponding to the current dew point temperature is not high, and at the moment, the relative humidity detected by the electronic humidity sensor can be directly used as the current relative humidity of the target space, and the operation of the current relative humidity is not needed by utilizing the current dew point temperature, so that the operation resources are saved. If the current dew point temperature is within the dew point interval, if the current dew point temperature is < -34td, the accuracy requirement on the relative humidity corresponding to the current dew point temperature is higher, and the current relative humidity of the target space is obtained according to the current dew point temperature and the current vapor pressure. Therefore, the high-precision detection of the relative humidity can be performed for the change interval of a certain dew point temperature by setting the preset dew point interval, so that the calculation of the relative humidity is not required for all the dew point temperatures, and the calculation of the relative humidity is only required for a specific dew point interval, so that the detection of the relative humidity is more targeted.
Considering that the performance of the battery is affected by the ambient humidity, in some embodiments, the preset dew point interval may be set according to the endpoint value of the preset humidity interval and any ambient temperature, so as to obtain the preset dew point interval at any ambient temperature.
Because the water vapor pressure is determined based on the ambient temperature, the verified data sheet recorded with the correspondence between the dew point temperature, the water vapor pressure and the relative humidity can be converted into the verified data sheet recorded with the correspondence between the dew point temperature, the ambient temperature and the relative humidity. Because the relative humidity at different temperatures has different influences on the performance of the battery, a preset dew point interval can be formed by setting a preset humidity interval and an environment temperature, searching the data table for the dew point temperature corresponding to the endpoint value of the preset humidity interval and the environment temperature through the endpoint value of the preset humidity interval and the environment temperature, and taking the searched dew point temperature as the endpoint value.
As a possible embodiment, assuming that the preset humidity interval is (10% rh,20% rh) and the ambient temperature is 25 ℃, the dew point temperature corresponding to 10% rh or the dew point temperature corresponding to the relative humidity closest to 10% rh in the case where the ambient temperature is 25 ℃ may be found from the data table, and the dew point temperature is taken as the left end point of the preset dew point interval. Similarly, the dew point temperature corresponding to 20% rh or the dew point temperature corresponding to the relative humidity closest to 20% rh in the case where the ambient temperature is 25 ℃ may be found from the data table, and the dew point temperature may be taken as the right end point of the preset dew point section, thereby forming the preset dew point section in the case where the ambient temperature is 25 ℃. It is understood that if the preset humidity zone is an on/off zone, the preset dew point zone is also an on/off zone.
As another possible embodiment, assuming that only one right end point exists in the preset humidity interval, for example, the preset humidity interval is < 2% rh and the ambient temperature is 25 ℃, the dew point temperature corresponding to 2% rh in the case where the ambient temperature is 25 ℃ or the dew point temperature corresponding to the relative humidity closest to 2% rh may be found from the data table as the right end point to form the preset dew point interval in the case where the ambient temperature is 25 ℃ based on the right end point. Similarly, if there is only one left end point in the preset humidity zone, the dew point temperature found from the data table may be used as the left end point to form a preset dew point zone based on the left end point in the case where the ambient temperature is 25 ℃.
The preset dew point interval under any ambient temperature is obtained through the endpoint value of the preset humidity interval and any ambient temperature, so that the high-precision detection of the relative humidity can be performed in the change interval of a certain relative humidity by setting the preset humidity interval, and the pertinence of the detection of the relative humidity is further improved.
The preset dew point interval at any ambient temperature can be obtained by looking up a table from the endpoint value of the preset humidity interval and the ambient temperature. In order to avoid that no corresponding data exists in the data table, such as the endpoint value of the preset humidity interval, the ambient temperature or the dew point temperature, the corresponding relation of the verified relative humidity, the ambient temperature and the dew point temperature needs to be added into the data table as much as possible. However, this approach may result in an excessive amount of data in the data table, increased storage pressure, and reduced efficiency in searching for data. Meanwhile, since the data table cannot exhaust all data, there still exists a case that the preset dew point interval cannot be determined by searching the data table.
For this purpose, in some embodiments, the obtaining the preset dew point interval at any ambient temperature according to the endpoint value of the preset humidity interval and any ambient temperature includes:
and inputting the end point value of the preset humidity interval and any environmental temperature into a logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity to obtain the preset dew point interval at any environmental temperature.
In some embodiments, a function fit may be performed based on the correspondence of the three of the relative humidity, the ambient temperature, and the dew point temperature in the verified data table, and a logarithmic function model may be constructed that represents the correspondence of the dew point temperature and the relative humidity. A coordinate system is constructed, for example, with dew point temperature on the ordinate and relative humidity on the abscissa. By looking up the data table, the relative humidity and the dew point temperature at a certain ambient temperature can be obtained, and then the obtained relative humidity and dew point temperature are added to the coordinate system, so that a change curve representing the change trend of the ambient temperature-relative humidity-dew point temperature can be obtained. For example, the relative humidity and dew point temperatures, which are 10 ℃, 13 ℃, 16 ℃, 19 ℃, 22 ℃ and 25 ℃ respectively, can be found and added to the coordinate system to obtain a change curve representing the trend of the change in the ambient temperature-relative humidity-dew point temperature, as shown in fig. 2. Wherein, each change curve in FIG. 2 corresponds to 25 ℃, 22 ℃, 19 ℃, 16 ℃, 13 ℃ and 10 ℃ from top to bottom in sequence. Because the water vapor pressure can be obtained according to the ambient temperature, the logarithmic function relation of the one-to-one correspondence between the dew point temperature and the relative humidity can be determined under the condition of the same ambient temperature or the same water vapor pressure through the change curves, and therefore the numerical value of each change curve is utilized for carrying out function fitting to obtain a logarithmic function model: . Wherein (1)>The dew point temperature is represented by E, the water vapor pressure determined from the ambient temperature, U, the relative humidity, and b and c, respectively. Therefore, the obtained logarithmic function model can accurately reflect the corresponding relation of the dew point temperature, the ambient temperature/the water vapor pressure and the relative humidity, and further the preset dew point interval at any ambient temperature obtained later is more accurate.
Alternatively, the logarithmic function model representing the correspondence between the dew point temperature and the relative humidity may be obtained by regression based on a TETENS saturated water pressure equation, an absolute humidity equation, a water vapor density equation, and a relative humidity calculation equation.
Illustratively, the TETENS saturated water pressure formula is: EW (EW)（1）
The absolute humidity formula is:（2）
the water vapor density calculation formula is:
ρ*1000/(461.52*(t+273.15)) （3）
the relative humidity calculation formula is:
U（4）
wherein, t represents temperature, EW represents pure water level saturated water vapor pressure, and unit hPa; u represents relative humidity; e represents the actual water vapor pressure; ρw is the water vapor density; a is a constant, e.g. a=1/273.15.
Since the temperature at this time is the dew point temperature when the water vapor reaches saturation, it is obtained by the formulas (1) - (4):
namely:
td
where td represents the dew point temperature. Thus, a logarithmic function model can be obtained: Wherein, the method comprises the steps of, wherein,c is a constant, e.g. b= = ->，c=/>. b. The specific value of c can be adjusted according to a large number of experimental verification results, such as the relative humidity, dew point temperature and environmental temperature with corresponding relation can be used as a group of training samples, and then a plurality of groups of training samples are input into the logarithmic function model to obtain a constant +.>And c.
Then, the verified data in the data table is substituted into the logarithmic function model, or the numerical value of the change curve in fig. 2 is substituted into the logarithmic function model, so that the accuracy of the logarithmic function model is improved.
After the logarithmic function model is obtained, the endpoint value of the preset humidity interval and any environmental temperature can be input into the logarithmic function model, so that the dew point temperature at the environmental temperature can be obtained by utilizing the endpoint value of the preset humidity interval and the water vapor pressure determined by the environmental temperature, and the dew point temperature is used as the endpoint value to generate the preset dew point interval at the environmental temperature.
The preset dew point interval at any ambient temperature is obtained by using the logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity, so that when the preset dew point interval needs to be determined, the mode of searching a data table is not needed, the storage pressure and the data query pressure are reduced, the situation that the preset dew point interval cannot be obtained by searching the data table is reduced, and the acquisition efficiency of the preset dew point interval is improved. In addition, the preset dew point interval is determined through the constructed logarithmic function model, so that the obtained preset dew point interval at any ambient temperature can be more accurate.
In view of the fact that not all humidity environments have an impact on the performance of the battery, in some embodiments, the preset humidity interval may be determined based on at least one of the spatial information of the target space, or the product information of the battery within the target space.
The space information of the space may include at least one of a size of the space, a device forming the space, a building, and the like. The product information of the battery includes at least one of information of the kind of the battery, the size of the battery, the capacity of the battery, and the like. Because the relative humidity in different spaces has different influences on the battery performance, the performance of different batteries is also different under the influence of the relative humidity, so the influence of the relative humidity in different spaces on the battery performance can be recorded in advance, and relative humidity intervals which are respectively corresponding to different spaces and can influence the battery performance, such as the relative humidity intervals which are in a ternary system factory building and can influence the battery performance, the relative humidity intervals which are in a transfer cabinet and can influence the battery performance, and the like are obtained. Then, the corresponding relation between the spaces and the relative humidity interval can be recorded in the first mapping table. Similarly, the relative humidity intervals that affect the battery performance of the lithium iron phosphate battery, such as the relative humidity intervals that affect the battery performance of the zinc-manganese battery, can be obtained in advance for the batteries with different product information. Then, the corresponding relation between the product information of the batteries and the relative humidity interval can be recorded into a second mapping table.
As a possible implementation manner, after the first mapping table is obtained, a relative humidity interval corresponding to the spatial information can be searched from the first mapping table according to the spatial information of the target space, and the relative humidity interval is used as a preset humidity interval. Or after the second mapping table is obtained, the relative humidity interval corresponding to the product information can be searched from the second mapping table according to the product information of the battery in the target space and used as the preset humidity interval.
In consideration of the fact that the relative humidity of different spaces has different influences on the performance of the battery, and the performance of different batteries is also different under the influence of the relative humidity, in order to enable the relative humidity affecting the performance of the battery to be monitored more comprehensively, as another possible implementation manner, a first relative humidity interval corresponding to the space information can be searched from a first mapping table according to the space information of the target space, and a second relative humidity interval corresponding to the product information can be searched from a second mapping table according to the product information of the battery in the target space. And then taking the union of the first relative humidity interval and the second relative humidity interval as a preset humidity interval.
The preset humidity interval is determined by utilizing at least one of the space information of the target space or the product information of the battery in the target space, so that the preset humidity interval influencing the performance of the battery can be obtained, when the obtained current dew point temperature is in the preset dew point interval determined by the preset humidity interval, the current relative humidity of the target space is determined by utilizing the current dew point temperature, and the relative humidity influencing the performance of the battery can be monitored in a targeted manner, so that the validity of the relative humidity detection is improved.
In some embodiments, in order to save the computing resources of the current relative humidity detection process, if the current dew point temperature is not within the preset dew point interval determined by the preset humidity interval, the electronic humidity sensor may be used to directly detect the relative humidity. In view of the fact that the accuracy of the electronic humidity sensor has a drift amount of 2% to 3% rh, i.e. an error, the electronic humidity sensor cannot detect the relative humidity in a region below the drift amount, so that the electronic humidity sensor cannot meet the requirement of detecting the relative humidity of a lower value, such as the requirement of detecting the relative humidity of < 2% rh.
To this end, in some embodiments, the maximum value of the preset humidity interval may be determined according to the drift amount of the target device for measuring the relative humidity, such as an electronic humidity sensor, so as to monitor the relative humidity of the humidity interval which cannot be detected by the target device, thereby meeting the monitoring requirement of the relative humidity with a low value.
As a possible implementation manner, if the drift amount of the target device is 2% rh, the maximum value of the preset humidity interval may be determined to be 2% rh, so as to determine that the preset humidity interval is less than 2% rh, so that if the preset humidity interval corresponding to the current dew point temperature is more than or equal to 2% rh, the electronic humidity sensor may be used to directly detect the current dew point temperature; if the preset humidity interval corresponding to the current dew point temperature is less than 2% RH, the humidity interval which cannot be detected by the electronic humidity sensor can be detected through the current dew point temperature and the vapor pressure.
As another possible embodiment, an initial humidity interval may be obtained first according to at least one of the spatial information of the target space, or the product information of the battery in the target space. If the maximum value of the initial humidity interval is smaller than or equal to the drift amount of the target equipment, the initial humidity interval is taken as a preset humidity interval; if the maximum value of the initial humidity interval is larger than the drift amount of the target equipment, replacing the maximum value of the initial humidity interval with the drift amount of the target equipment to form a preset humidity interval.
The maximum value of the preset humidity interval is determined by measuring the drift amount of target equipment of the relative humidity, so that the humidity interval which cannot be detected by the electronic humidity sensor can be detected by utilizing the current dew point temperature and the vapor pressure. And further, the coverage of the detection of the relative humidity is larger, and meanwhile, the detection precision of the relative humidity is improved.
In some embodiments, after the current dew point temperature and the current water vapor pressure are obtained, if the current relative humidity of the target space needs to be calculated according to the current dew point temperature and the current water vapor pressure, the relative humidity corresponding to the current dew point temperature and the current water vapor pressure can be searched from a verified data table recorded with the corresponding relation among the dew point temperature, the water vapor pressure and the relative humidity, and the data table is used as the current relative humidity of the target space. In order to avoid that no corresponding data exists in the data table, such as that the current dew point temperature and/or the current water vapor pressure do not exist, or that the current relative humidity corresponding to the current dew point temperature and the current water vapor pressure cannot be found, the corresponding relation of the verified dew point temperature, the verified water vapor pressure and the verified relative humidity needs to be added into the data table as much as possible. However, this approach may result in an excessive amount of data in the data table, increased storage pressure, and reduced efficiency in searching for data. Meanwhile, since the data table cannot exhaust all data, the current relative humidity cannot be obtained still in a data table searching mode.
To this end, in some embodiments, deriving the current relative humidity of the target space from the current dew point temperature and the current water vapor pressure includes:
and inputting the current dew point temperature and the current water vapor pressure into a logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity to obtain the current relative humidity of the target space.
In some embodiments, in the case where it is desired to determine the current relative humidity of the target space based on the current dew point temperature and the current water vapor pressure, the current dew point temperature and the current water vapor pressure may be input into the above constructed logarithmic function model:thereby obtaining the current relative humidity of the target space.
The current relative humidity of the target space is obtained by using a logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity, so that when the current relative humidity of the target space needs to be determined, the storage pressure and the data query pressure are not required to be determined in a data table searching mode, the situation that the current relative humidity of the target space cannot be obtained through the data table searching is reduced, and the acquisition efficiency of the current relative humidity is improved. In addition, the current relative humidity of the target space is determined through the constructed logarithmic function model, so that the obtained current relative humidity of the target space can be more accurate.
Fig. 3 shows a schematic structural diagram of a humidity detection apparatus provided in the present application, and it should be understood that the apparatus corresponds to the embodiment of the method performed in fig. 1, and is capable of performing the steps involved in the foregoing method, and specific functions of the apparatus may be referred to in the foregoing description, and detailed descriptions thereof are omitted herein as appropriate to avoid redundancy. The device includes at least one software functional module that can be stored in memory in the form of software or firmware (firmware) or cured in an Operating System (OS) of the device. Specifically, the device comprises: a data acquisition module 201, configured to acquire a current ambient temperature and a current dew point temperature of a target space; the data processing module 202 is configured to obtain a current water vapor pressure of the target space according to the current ambient temperature; the humidity detection module 203 is configured to obtain a current relative humidity of the target space according to the current dew point temperature and the current steam pressure.
In the technical scheme of the embodiment of the application, the current relative humidity of the target space is obtained through the current dew point temperature of the target space and the current vapor pressure of the target space determined according to the current ambient temperature, so that the relative humidity of the target space is not required to be detected through the electronic humidity sensor, and the situation that the humidity detection error is high due to the damage of the electronic humidity sensor is avoided. Meanwhile, because the index requirement on the environment is lower when the temperature is monitored at present than when the relative humidity is directly monitored, the precision influence caused by environmental factors is smaller, and the precision which can be achieved by the detection of the temperature is higher at present, so that the relative humidity obtained by using the dew point temperature and the water vapor pressure is more accurate, and the accuracy of the humidity detection result is improved.
According to some embodiments of the present application, the data acquisition module 201 is specifically configured to: and determining that a battery exists in the target space, and acquiring the current ambient temperature and the current dew point temperature of the target space.
According to some embodiments of the present application, the humidity detection module 203 is specifically configured to: and determining that the current dew point temperature is in a preset dew point interval, and obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure.
According to some embodiments of the present application, the humidity detection module 203 is further configured to: and obtaining a preset dew point interval at any ambient temperature according to the endpoint value of the preset humidity interval and any ambient temperature.
According to some embodiments of the present application, the humidity detection module 203 is specifically configured to: and inputting the end point value of the preset humidity interval and any environmental temperature into a logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity to obtain the preset dew point interval at any environmental temperature.
According to some embodiments of the present application, the humidity detection module 203 is further configured to: and determining a preset humidity interval according to at least one of the space information of the target space or the product information of the battery in the target space.
According to some embodiments of the present application, the maximum value of the preset humidity interval is determined according to the drift amount of the target device for measuring the relative humidity.
According to some embodiments of the present application, the humidity detection module 203 is specifically configured to: and inputting the current dew point temperature and the current water vapor pressure into a logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity to obtain the current relative humidity of the target space.
According to some embodiments of the present application, the logarithmic function model includesThe method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>The dew point temperature is represented by E, the water vapor pressure determined from the ambient temperature, U, the relative humidity, and b and c, respectively.
According to some embodiments of the present application, as shown in fig. 4, the present application provides an electronic device 300, comprising: processor 301 and memory 302, the processor 301 and memory 302 being interconnected and in communication with each other by a communication bus 303 and/or other form of connection mechanism (not shown), the memory 302 storing a computer program executable by the processor 301, the processor 301 executing the computer program when the computing device is running to perform the method performed by the external machine in any alternative implementation, such as: acquiring the current ambient temperature and the current dew point temperature of the target space; obtaining the current water vapor pressure of the target space according to the current ambient temperature; and obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure.
The present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs a method in any of the foregoing alternative implementations.
The storage medium may be implemented by any type of volatile or nonvolatile Memory device or combination thereof, such as static random access Memory (Static Random Access Memory, SRAM), electrically erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), erasable Programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), programmable Read-Only Memory (PROM), read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk.
The present application provides a computer program product which, when run on a computer, causes the computer to perform the method in any of the alternative implementations.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (9)

1. A method of humidity detection, the method comprising:
acquiring the current ambient temperature and the current dew point temperature of the target space;
obtaining the current water vapor pressure of the target space according to the current ambient temperature;
determining that the current dew point temperature is in a preset dew point interval, and obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure;
the preset dew point interval is determined according to a preset humidity interval, the preset humidity interval is determined according to an initial humidity interval and a drift amount of target equipment for measuring relative humidity, and the initial humidity interval is used as a preset humidity interval when the maximum value of the initial humidity interval is smaller than or equal to the drift amount of the target equipment; under the condition that the maximum value of the initial humidity interval is larger than the drift amount, replacing the maximum value of the initial humidity interval with the drift amount to form a preset humidity interval;
and the initial humidity interval is obtained according to a first relative humidity interval corresponding to the space information of the target space and a second relative humidity interval corresponding to the product information of the battery in the target space.
2. The method of claim 1, wherein the acquiring the current ambient temperature and the current dew point temperature of the target space comprises:
and determining that a battery exists in the target space, and acquiring the current ambient temperature and the current dew point temperature of the target space.
3. The method as recited in claim 1, further comprising:
and obtaining the preset dew point interval at any one of the environmental temperatures according to the end point value of the preset humidity interval and any one of the environmental temperatures.
4. A method according to claim 3, wherein the obtaining the preset dew point interval at any one of the ambient temperatures according to the endpoint value of the preset humidity interval and any one of the ambient temperatures comprises:
and inputting the end point value of the preset humidity interval and any environmental temperature into a logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity to obtain the preset dew point interval at any environmental temperature.
5. The method of claim 1, wherein said deriving a current relative humidity of said target space from said current dew point temperature and said current water vapor pressure comprises:
and inputting the current dew point temperature and the current water vapor pressure into a logarithmic function model representing the corresponding relation between the dew point temperature and the relative humidity, and obtaining the current relative humidity of the target space.
6. The method of claim 4 or 5, wherein the logarithmic function model comprisesThe method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>The dew point temperature is represented by E, the water vapor pressure determined from the ambient temperature, U, the relative humidity, and b and c, respectively.
7. A humidity detection apparatus, the apparatus comprising:
the data acquisition module is used for acquiring the current ambient temperature and the current dew point temperature of the target space;
the data processing module is used for obtaining the current water vapor pressure of the target space according to the current environment temperature;
the humidity detection module is used for determining that the current dew point temperature is in a preset dew point interval and obtaining the current relative humidity of the target space according to the current dew point temperature and the current water vapor pressure;
the preset dew point interval is determined according to a preset humidity interval, the preset humidity interval is determined according to an initial humidity interval and a drift amount of target equipment for measuring relative humidity, and the initial humidity interval is used as a preset humidity interval when the maximum value of the initial humidity interval is smaller than or equal to the drift amount of the target equipment; under the condition that the maximum value of the initial humidity interval is larger than the drift amount, replacing the maximum value of the initial humidity interval with the drift amount to form a preset humidity interval;
And the initial humidity interval is obtained according to a first relative humidity interval corresponding to the space information of the target space and a second relative humidity interval corresponding to the product information of the battery in the target space.
8. An electronic device comprising a processor and a memory storing a computer program, characterized in that the processor implements the method of any one of claims 1 to 6 when executing the computer program.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method of any one of claims 1 to 6.
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