A dehumidification control system for an energy storage system

Abstract

The patent application discloses a dehumidification control system of an energy storage system, comprising an energy storage EMS, a temperature sensor arranged on a cold plate, a temperature and humidity tester arranged in an energy storage cabinet and a dehumidifier, the temperature sensor is used for detecting the surface temperature of the cold plate in real time, the temperature and humidity tester is used for detecting the environmental temperature and humidity in the energy storage cabinet in real time, the temperature sensor and the temperature and humidity tester transmit the measured data to the energy storage EMS, the energy storage EMS stores different temperature and humidity control formulas corresponding to different cold plate surface temperatures in different environmental temperature intervals, the energy storage EMS obtains the corresponding humidity control range according to the received environmental temperature data and the corresponding control formula, and controls the dehumidifier to perform dehumidification operation. The present application can solve the condensation problem caused by the existing condensing dehumidifier, reduce the energy consumption of the dehumidifier and prolong the service life of the dehumidifier by combining with the cold plate and controlling the dehumidifier in real time and accurately.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage systems, in particular to a dehumidification control system of an energy storage system. BACKGROUND

[0002] To ensure the safe and stable operation of the energy storage system, how to control the humidity in the energy storage system is the most important. Humidity control plays an important role in the safety, stability and service life of the battery. The working environment of the battery has very strict requirements on humidity. Dehumidification is an important part of the battery operation, which can ensure and improve the performance of the battery, especially high-energy metals such as lithium batteries, which have very high requirements on the environment because they are easily reacted with water vapor, which may cause fire hazards. Therefore, for the batteries and other electrical equipment used in the energy storage system, controlling humidity is an important measure to ensure their safe storage and use.

[0003] The dehumidification equipment currently used in the energy storage system is mostly passive condensation dehumidifier. Such dehumidifiers dehumidify by setting a fixed limit humidity value. However, since the design of the dehumidifier is usually based on a certain standard or ideal working condition, it is often difficult to achieve the best dehumidification effect when facing the complex and changing environmental conditions of the energy storage system, which may cause various condensation problems and threaten the safety and stability of the operation of the energy storage system. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a dehumidification control system of an energy storage system to solve the condensation problems that may be caused by the existing condensation dehumidifier.

[0005] The technical solution adopted by the present application is as follows:

[0006] A dehumidification control system of an energy storage system, comprising an energy storage EMS, a temperature sensor arranged on a cold plate, a temperature and humidity tester arranged in an energy storage cabinet, and a dehumidifier. The temperature sensor is used to detect the surface temperature of the cold plate in real time, and the temperature and humidity tester is used to detect the environmental temperature and humidity in the energy storage cabinet in real time. The temperature sensor and the temperature and humidity tester transmit the measured data to the energy storage EMS. The energy storage EMS stores different temperature and humidity control formulas corresponding to different environmental temperature intervals at different cold plate surface temperatures. The energy storage EMS obtains the corresponding humidity control range according to the received environmental temperature data and the corresponding control formula, and controls the dehumidifier to perform dehumidification operation.

[0007] As a preferred embodiment of the present application, the temperature and humidity control formula comprises:

[0008] A. The cold plate temperature is 17-20℃

[0009] When the ambient temperature is 18-25℃, the control formula is T=38-0.2X;

[0010] When the ambient temperature is 25-30℃, the control formula is T=46.7-0.33X;

[0011] When the ambient temperature is 30-35℃, the control formula is T=50-0.4X;

[0012] When the ambient temperature is 35-40℃, the control formula is T=60-0.667X;

[0013] When the ambient temperature is more than 40℃, the control formula is T=60-0.667X;

[0014] B, the cold plate temperature is 20-23℃

[0015] When the ambient temperature is 20-25℃, the control formula is T=40-0.2X;

[0016] When the ambient temperature is 25-30℃, the control formula is T=47-0.294X;

[0017] When the ambient temperature is 30-35℃, the control formula is T=48.125-0.313X;

[0018] When the ambient temperature is 35-40℃, the control formula is T=65-0.714X;

[0019] When the ambient temperature is more than 40℃, the control formula is T=65-0.714X;

[0020] C, the cold plate temperature is 23-26℃

[0021] When the ambient temperature is 23-25℃, the control formula is T=45-0.22X;

[0022] When the ambient temperature is 25-30℃, the control formula is T=46.7-0.238X;

[0023] When the ambient temperature is 30-35℃, the control formula is T=49.4-0.278X;

[0024] When the ambient temperature is 35-40℃, the control formula is T=78-0.83X;

[0025] When the ambient temperature is more than 40℃, the control formula is T=78-0.83X;

[0026] Wherein, T represents the current ambient temperature, X represents the limit humidity value under the current ambient temperature, that is, the maximum relative humidity value allowed by the environment.

[0027] As a preferred embodiment of the present application, the energy storage EMS stores the psychrometric chart, and obtains the dew point temperature in the corresponding environment according to the psychrometric chart and the received ambient temperature and humidity, and controls the start and stop of the dehumidifier by comparing the surface temperature of the cold plate and the dew point temperature.

[0028] As a preferred embodiment of the present application, the control of the dehumidifier by the energy storage EMS includes: when the surface temperature of the cold plate is lower than the dew point temperature, the energy storage EMS sends a command to the dehumidifier that no dehumidification is needed; when the surface temperature of the cold plate is higher than the dew point temperature, the energy storage EMS selects a corresponding temperature and humidity control formula according to the surface temperature of the cold plate and the ambient temperature, obtains a corresponding limit humidity value according to the selected control formula and the current ambient temperature, and controls the dehumidifier to perform dehumidification operation according to the limit humidity value.

[0029] As a preferred embodiment of the present application, the temperature sensor is arranged close to the surface of the cold plate, and one temperature sensor is arranged on each cold plate, and the data measured by each temperature sensor is transmitted to the energy storage EMS, and the energy storage EMS obtains the surface temperature value of the cold plate by averaging all the received temperature values.

[0030] As a preferred embodiment of the present application, the dehumidification process of the dehumidifier includes: when the limit humidity value is less than the current ambient humidity value, the dehumidifier enters the dehumidification mode and dehumidifies for six minutes, after dehumidifying for six minutes, if the limit humidity value is still less than the current ambient humidity value, the dehumidifier continues to dehumidify, and if the limit humidity value is greater than or equal to the current humidity value, the dehumidifier closes the dehumidification mode.

[0031] Compared with the prior art, the present application has the following improvements and advantages:

[0032] 1、The dehumidification control system of the application can set different control formulas according to different cold plate temperatures by combining with the cold plate, can realize accurate control of the dehumidification amount, can reduce the energy consumption of the dehumidifier compared with the passive dehumidification mode in the traditional energy storage system, and can improve the service life of the dehumidifier. Because the maximum relative humidity value allowed by the environment is different due to different cold plate temperatures under the same environment temperature, if the cold plate temperature is lower, the maximum relative humidity value allowed by the environment is smaller, and more dehumidification is required, on the contrary, if the cold plate temperature is higher, the maximum relative humidity value allowed by the environment is larger, and the required dehumidification is relatively less, therefore, when the cold plate temperature is relatively high, only a small amount of dehumidification is required. The present application considers the temperature of the cold plate, gives corresponding different temperature and humidity control strategies under different cold plate surface temperature intervals, can ensure that the dehumidifier can adjust the dehumidification amount according to the change of the cold plate temperature, realizes accurate control, and saves energy consumption. In the prior art, the cold plate temperature is not considered, the same control strategy is adopted, if the control strategy is formulated under the condition that the cold plate temperature is the lowest, when the cold plate temperature is relatively high, the dehumidifier will appear excessive dehumidification; if the control strategy is formulated under the condition that the cold plate temperature is the highest, when the cold plate temperature is relatively low, the dehumidifier will appear insufficient dehumidification.

[0033] 2、The dehumidification control system of the application further sets different temperature and humidity control strategies according to different environment temperature intervals, to further realize real-time and accurate control of the dehumidifier, to ensure that the energy storage system can fully guarantee the dehumidification effect, can avoid excessive dehumidification and save energy consumption while avoiding condensation phenomenon. Because the corresponding relative temperature and humidity has irregularity under different environment temperatures, the present application considers this factor, divides the temperature into multiple intervals, and adopts different control formulas respectively, to make the dehumidification amount control more accurate, to further avoid excessive dehumidification, reduce the energy consumption of the dehumidifier, and improve the service life of the dehumidifier. And carry out corresponding dehumidification operation.

[0034] In summary, the present application combines the cold plate temperature and the environment temperature, obtains different temperature and humidity control formulas corresponding to different cold plate surface temperatures and different environment temperature intervals, makes the dehumidification amount control more accurate under the corresponding environment, not only can solve the condensation problem that may occur in the existing condensing dehumidifier, but also can realize the purpose of energy saving, is beneficial to improve the service life of the dehumidifier. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is the flow chart of the dehumidification control of the energy storage system in the embodiment of the application;

[0036] Figure 2 is the enthalpy humidity chart in the EMS of the application embodiment;

[0037] Figure 3is a dehumidification flow block diagram when the dehumidifier in the embodiment of the present application runs. DETAILED DESCRIPTION

[0038] The typical embodiments embodying the features and advantages of the present application will now be described in detail. It should be appreciated that the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0039] The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] The embodiment discloses a dehumidification control system of an energy storage system, and a specific dehumidification control process, referring to Figure 1 As shown in the figure, the dehumidification control system comprises an energy storage EMS, a temperature sensor arranged on a cold plate, a temperature and humidity tester arranged in an energy storage cabinet, and a dehumidifier. The temperature sensor is used to detect the surface temperature of the cold plate in real time. In the present application, a plurality of temperature sensors are arranged, and each temperature sensor is tightly attached to the surface of a cold plate to detect the temperature of each cold plate in real time. The data measured by each temperature sensor is transmitted to the energy storage EMS, and the energy storage EMS takes the average of all the received temperature values to obtain the surface temperature of the cold plate.

[0041] The temperature and humidity tester is used to detect the environmental temperature and humidity in the energy storage cabinet in real time, and transmit the environmental temperature and humidity data to the energy storage EMS. The energy storage EMS stores different temperature and humidity control formulas corresponding to different environmental temperature intervals at different cold plate surface temperatures. The specific temperature and humidity control formula comprises:

[0042] A. When the cold plate temperature is 17-20℃, the temperature and humidity control formula corresponding to the following environmental temperature interval is:

[0043] When the environmental temperature is 18-25℃, the control formula is T=38-0.2X;

[0044] When the environmental temperature is 25-30℃, the control formula is T=46.7-0.33X;

[0045] When the environmental temperature is 30-35℃, the control formula is T=50-0.4X;

[0046] When the ambient temperature is 35-40℃, the control formula is T=60-0.667X;

[0047] When the ambient temperature exceeds 40℃, the control formula is T=60-0.667X;

[0048] B. When the cold plate temperature is 20-23℃, the corresponding temperature and humidity control formula in the following ambient temperature range is:

[0049] When the ambient temperature is 20-25℃, the control formula is T=40-0.2X;

[0050] When the ambient temperature is 25-30℃, the control formula is T=47-0.294X;

[0051] When the ambient temperature is 30-35℃, the control formula is T=48.125-0.313X;

[0052] When the ambient temperature is 35-40℃, the control formula is T=65-0.714X;

[0053] When the ambient temperature exceeds 40℃, the control formula is T=65-0.714X;

[0054] C. When the cold plate temperature is 23-26℃, the corresponding temperature and humidity control formula in the following ambient temperature range is:

[0055] When the ambient temperature is 23-25℃, the control formula is T=45-0.22X;

[0056] When the ambient temperature is 25-30℃, the control formula is T=46.7-0.238X;

[0057] When the ambient temperature is 30-35℃, the control formula is T=49.4-0.278X;

[0058] When the ambient temperature is 35-40℃, the control formula is T=78-0.83X;

[0059] When the ambient temperature exceeds 40℃, the control formula is T=78-0.83X;

[0060] Wherein, T represents the current ambient temperature, and X represents the limit humidity value under the current ambient temperature, that is, the maximum relative humidity value allowed by the environment.

[0061] Since the maximum relative humidity value allowed by the environment changes with the cold plate temperature at the same ambient temperature, the minimum dehumidification amount required for control also changes, so to avoid excessive dehumidification, the present application considers the change of the cold plate temperature, by giving corresponding different temperature and humidity control strategies at different cold plate surface temperature intervals, which can ensure that the dehumidifier can adjust the dehumidification amount according to the change of the cold plate temperature, to realize precise control, and thus save energy consumption.

[0062] Since the corresponding relative humidity at different ambient temperatures has irregularity, to accurately calculate the dehumidification amount at the corresponding ambient temperature, the present application divides the temperature into multiple intervals, and uses different control formulas for corresponding dehumidification operations, which can make the dehumidification amount control more accurate, and thus avoid excessive dehumidification, reduce the energy consumption of the dehumidifier, and improve the service life of the dehumidifier.

[0063] After the energy storage EMS receives the real-time cold plate surface temperature, ambient temperature and humidity data, it selects the corresponding temperature and humidity control formula, and according to the corresponding control formula and the received ambient temperature data, the corresponding limit humidity value can be obtained, and the dehumidifier is controlled to dehumidify.

[0064] Among them, the specific control of the energy storage EMS to the dehumidifier includes that the energy storage EMS stores an enthalpy-humidity chart, as shown in Figure 2 The enthalpy-humidity chart can represent the relationship between the ambient temperature and humidity and the dew point temperature at a certain atmospheric pressure, and the energy storage EMS obtains the dew point temperature at the corresponding ambient temperature according to the enthalpy-humidity chart and the received ambient temperature and humidity data. The energy storage EMS controls the start and stop of the dehumidifier by comparing the cold plate surface temperature and the dew point temperature. When the cold plate surface temperature is lower than the dew point temperature, the energy storage EMS sends a dehumidification-free instruction to the dehumidifier and controls the dehumidifier to stop; when the cold plate surface temperature is higher than the dew point temperature, the energy storage EMS controls the dehumidifier to run and dehumidify according to the previously obtained corresponding limit humidity value.

[0065] Among them, the dehumidification process of the dehumidifier, as shown in Figure 3 includes that after the energy storage EMS controls the dehumidifier to run, when the limit humidity value is less than the current ambient humidity value, the dehumidifier enters the dehumidification mode and dehumidifies for six minutes, and after dehumidifying for six minutes, if the limit humidity value is still less than the current ambient humidity value, the dehumidifier continues to dehumidify, and once the limit humidity value is greater than or equal to the current humidity value, the dehumidifier closes the dehumidification mode.

[0066] The application combines the dehumidification control system with the cold plate, and through giving different temperature and humidity control strategies corresponding to different environment temperature intervals under different cold plate surface temperature intervals, real-time and accurate control of the energy storage EMS on the dehumidifier can be realized, the condensation phenomenon on the surface of the cold plate in the energy storage cabinet is avoided, the safety and stability of the energy storage system are ensured, excessive dehumidification is avoided, the energy consumption of the dehumidifier is reduced, and the service life of the dehumidifier is prolonged.

[0067] The above-mentioned embodiments are only preferred embodiments of the application, and cannot be used to limit the protection scope of the application, and any non-essential changes and replacements made by those skilled in the art on the basis of the application shall fall within the protection scope of the application.

Claims

1. A dehumidification control system for an energy storage system, characterized in that: The system includes an energy storage EMS, a temperature sensor mounted on the cold plate, a temperature and humidity tester installed inside the energy storage cabinet, and a dehumidifier. The temperature sensor is used to detect the surface temperature of the cold plate in real time, and the temperature and humidity tester is used to detect the ambient temperature and humidity inside the energy storage cabinet in real time. The temperature sensor and the temperature and humidity tester transmit the measured data to the energy storage EMS. The energy storage EMS stores different temperature and humidity control formulas corresponding to different surface temperatures of the cold plate in different ambient temperature ranges. The energy storage EMS obtains the corresponding humidity control range based on the received ambient temperature data and the corresponding control formulas, and controls the dehumidifier to perform dehumidification operation. The temperature and humidity control formula includes: A. Cold plate temperature greater than 17℃ and less than or equal to 20℃ When the ambient temperature is 18-25℃, the control formula is T=38-0.2X; When the ambient temperature is 25-30℃, the control formula is T=46.7-0.33X; When the ambient temperature is 30-35℃, the control formula is T=50-0.4X; When the ambient temperature is 35-40℃, the control formula is T=60-0.667X; When the ambient temperature exceeds 40℃, the control formula is T=60-0.667X; B. Cold plate temperature greater than 20℃ and less than or equal to 23℃ When the ambient temperature is 20-25℃, the control formula is T=40-0.2X; When the ambient temperature is 25-30℃, the control formula is T=47-0.294X; When the ambient temperature is 30-35℃, the control formula is T=48.125-0.313X; When the ambient temperature is 35-40℃, the control formula is T=65-0.714X; When the ambient temperature exceeds 40℃, the control formula is T=65-0.714X; C. Cold plate temperature greater than 23℃ and less than or equal to 26℃ When the ambient temperature is 23-25℃, the control formula is T=45-0.22X; When the ambient temperature is 25-30℃, the control formula is T=46.7-0.238X; When the ambient temperature is 30-35℃, the control formula is T=49.4-0.278X; When the ambient temperature is 35-40℃, the control formula is T=78-0.83X; When the ambient temperature exceeds 40℃, the control formula is T=78-0.83X; Where T represents the current ambient temperature, and X represents the maximum relative humidity value at the current temperature, i.e., the maximum relative humidity value allowed by the environment.

2. The dehumidification control system according to claim 1, characterized in that: The energy storage EMS stores an enthalpy-humidity chart. Based on the enthalpy-humidity chart and the received ambient temperature and humidity, the energy storage EMS obtains the dew point temperature under the corresponding environment. The energy storage EMS controls the start and stop of the dehumidifier by comparing the surface temperature of the cold plate and the dew point temperature.

3. The dehumidification control system according to claim 1, characterized in that: The control of the dehumidifier by the energy storage EMS includes: when the surface temperature of the cold plate is lower than the dew point temperature, the energy storage EMS sends a command to the dehumidifier that dehumidification is not required; when the surface temperature of the cold plate is higher than the dew point temperature, the energy storage EMS selects the corresponding temperature and humidity control formula according to the surface temperature of the cold plate and the ambient temperature, and obtains the corresponding limit humidity value according to the selected control formula and the current ambient temperature, and controls the dehumidifier to perform dehumidification operation according to the limit humidity value.

4. The dehumidification control system according to claim 1, characterized in that: The temperature sensor is installed close to the surface of the cold plate. Each cold plate has one temperature sensor. The data measured by each temperature sensor is transmitted to the energy storage EMS. The energy storage EMS takes the average of all the received temperature values ​​to obtain the surface temperature value of the cold plate.

5. The dehumidification control system according to claim 3, characterized in that: The dehumidification operation of the dehumidifier includes: when the limit humidity value is less than the current ambient humidity value, the dehumidifier enters the dehumidification mode and dehumidifies for six minutes; after six minutes of dehumidification, if the limit humidity value is still less than the current ambient humidity value, the dehumidifier continues to dehumidify; if the limit humidity value is greater than or equal to the current humidity value, the dehumidifier turns off the dehumidification mode.

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