Dehumidification control system of energy storage system

Abstract

The invention discloses a dehumidification control system of an energy storage system, which 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 for detecting the surface temperature of the cold plate in real time, and the temperature and humidity tester is used for detecting the environment temperature and humidity in the energy storage cabinet in real time. The temperature sensor and the temperature and humidity tester transmit measured data to the energy storage EMS, different temperature and humidity control formulas corresponding to different cold plate surface temperatures in different environment temperature intervals are stored in the energy storage EMS, and the energy storage EMS obtains corresponding humidity control ranges according to received environment temperature data and the corresponding control formulas. And the dehumidifier is controlled to perform dehumidification operation. By combining with the cold plate, the dehumidifier is accurately controlled in real time, the condensation problem possibly caused by an existing condensation dehumidifier can be solved, the energy consumption of the dehumidifier is reduced, and the service life of the dehumidifier is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage systems, and in particular to a dehumidification control system for an energy storage system. Background Art

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

[0003] The dehumidification equipment currently used in energy storage systems is mostly passive condensing dehumidifiers. This type of dehumidifier dehumidifies by setting a fixed limit humidity value. However, since the design of the dehumidifier is usually based on a certain standard or ideal operating condition, it is often difficult to achieve the best dehumidification effect when facing energy storage systems with complex and changing environmental conditions. This may cause various condensation problems and threaten the safety and stability of the energy storage system's operation. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a dehumidification control system for an energy storage system to solve the condensation problem that may be caused by the existing condensing dehumidifier.

[0005] The technical solution adopted by the present invention is as follows: A dehumidification control system for an energy storage 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, wherein the temperature sensor is used to detect the surface temperature of the cold plate in real time, the temperature and humidity tester is used to detect the ambient 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 ambient temperature ranges, the energy storage EMS obtains a corresponding humidity control range according to the received ambient temperature data and the corresponding control formula, and controls the dehumidifier to perform a dehumidification operation.

[0006] As a preferred embodiment of the present invention, the temperature and humidity control formula includes: A. The cold plate temperature is 17-20℃ 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°C, the control formula is, T=60-0.667X; B. The cold plate temperature is 20-23℃ 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°C, the control formula is, T=65-0.714X; C. The cold plate temperature is 23-26℃ 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°C, the control formula is, T=78-0.83X; 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.

[0007] As a preferred embodiment of the present invention, the energy storage EMS stores a psychrometric diagram. The energy storage EMS obtains the dew point temperature in the corresponding environment based on the psychrometric diagram and the received ambient temperature and humidity. The energy storage EMS controls the start and stop of the dehumidifier by comparing the cold plate surface temperature and the dew point temperature.

[0008] As a preferred embodiment of the present invention, the energy storage EMS controls the dehumidifier including: when the surface temperature of the cold plate is lower than the dew point temperature, the energy storage EMS sends an instruction to the dehumidifier that no dehumidification is required; 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 according to the limit humidity value.

[0009] As a preferred embodiment of the present invention, the temperature sensor is arranged close to the surface of the cold plate, and each cold plate is respectively provided with a temperature sensor. The data measured by each temperature sensor is transmitted to the energy storage EMS, and the energy storage EMS takes the average of all received temperature values ​​to obtain the surface temperature value of the cold plate.

[0010] As a preferred embodiment of the present invention, 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 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.

[0011] Compared with the prior art, the present invention has the following improvements and beneficial effects: 1. The dehumidification control system of the present invention can be combined with the cold plate to set different control formulas according to different cold plate temperatures, so as to realize precise control of the dehumidification amount. Compared with the passive dehumidification method in the traditional energy storage system, it can reduce the energy consumption of the dehumidifier and increase the service life of the dehumidifier. Because at the same ambient temperature, the maximum relative humidity value allowed by the environment will vary due to different cold plate temperatures. If the cold plate temperature is lower, the maximum relative humidity value allowed by the environment will be 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 will be larger, and the dehumidification amount required will be relatively small. Therefore, when the cold plate temperature is relatively high, only a small amount of dehumidification is required. This scheme takes into account the temperature of the cold plate. By giving corresponding different temperature and humidity control strategies under different cold plate surface temperature ranges, it can be ensured that the dehumidifier can adjust the dehumidification amount according to the change of the cold plate temperature to achieve precise control, thereby saving energy consumption. However, in the prior art, the cold plate temperature is not taken into consideration and the same control strategy is adopted. If the control strategy is formulated based on the lowest cold plate temperature, then when the cold plate temperature is relatively high, the dehumidifier will over-dehumidify; if the control strategy is formulated based on the highest cold plate temperature, then when the cold plate temperature is relatively low, the dehumidifier will under-dehumidify.

[0012] 2. The dehumidification control system of the present invention further sets different temperature and humidity control strategies according to different ambient temperature intervals to further realize real-time and precise control of the dehumidifier, so as to ensure that the energy storage system can fully guarantee the dehumidification effect and avoid condensation while avoiding excessive dehumidification and saving energy. Since the relative temperature and humidity corresponding to different ambient temperatures are irregular, the present invention takes this factor into consideration, divides the temperature into multiple groups of intervals, and adopts different control formulas respectively, so as to make the dehumidification amount more accurately controlled, so as to further avoid excessive dehumidification, reduce the energy consumption of the dehumidifier, and increase the service life of the dehumidifier. And perform corresponding dehumidification operations.

[0013] In summary, the present invention combines the cold plate temperature and the ambient temperature to obtain different temperature and humidity control formulas corresponding to different cold plate surface temperatures and different ambient temperature ranges, so that the dehumidification amount in the corresponding environment can be controlled more accurately. It can not only solve the condensation problem that may occur in the existing condensing dehumidifier, but also achieve the purpose of energy saving, which is beneficial to prolonging the service life of the dehumidifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a flowchart of dehumidification control of an energy storage system in an embodiment of the present invention; Figure 2 is a psychrometric diagram in the energy storage EMS according to an embodiment of the present invention; Figure 3 It is a dehumidification process flow chart of the dehumidifier in operation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0015] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0016] The purpose of using terms in this application is only to describe specific embodiments and is not intended to be a limitation of the application. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates another way. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0017] This embodiment discloses a dehumidification control system for an energy storage system. For a specific dehumidification control process, see Figure 1As shown, the dehumidification control system includes an energy storage EMS, a temperature sensor arranged on the cold plate, a temperature and humidity tester arranged in the energy storage cabinet, and a dehumidifier. The temperature sensor is used to detect the surface temperature of the cold plate in real time. Among them, multiple temperature sensors are arranged in this scheme, and each temperature sensor is closely attached to the surface of a cold plate, and is used 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 received temperature values ​​to obtain the surface temperature of the cold plate.

[0018] The temperature and humidity tester is used to detect the ambient temperature and humidity in the energy storage cabinet in real time, and transmit the ambient temperature and humidity 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 ambient temperature ranges. The specific temperature and humidity control formulas include: A. When the cold plate temperature is between 17-20℃, the corresponding temperature and humidity control formula in the following ambient temperature range is: 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°C, the control formula is, T=60-0.667X; B. When the cold plate temperature is between 20-23°C, the corresponding temperature and humidity control formula in the following ambient temperature range is: 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°C, the control formula is, T=65-0.714X; C. When the cold plate temperature is between 23-26°C, the corresponding temperature and humidity control formula in the following ambient temperature range is: 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°C, the control formula is, T=78-0.83X; 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.

[0019] Because at the same ambient temperature, the maximum relative humidity value allowed by the environment will change due to different cold plate temperatures, the minimum dehumidification amount that needs to be controlled will also change. Therefore, in order to avoid excessive dehumidification, the present invention takes into account the change of cold plate temperature. By providing corresponding different temperature and humidity control strategies under different cold plate surface temperature ranges, it can be ensured that the dehumidifier can adjust the dehumidification amount accordingly according to the change of cold plate temperature, so as to achieve precise control and save energy.

[0020] Since the corresponding relative humidity under different ambient temperatures is irregular, in order to accurately calculate the dehumidification amount under the corresponding ambient temperature, the present invention divides the temperature into multiple groups of intervals and adopts different control formulas to perform corresponding dehumidification operations. This can make the dehumidification amount control more accurate, thereby avoiding excessive dehumidification, reducing the energy consumption of the dehumidifier, and increasing the service life of the dehumidifier.

[0021] After receiving the real-time cold plate surface temperature, ambient temperature and humidity data, the energy storage EMS selects the corresponding temperature and humidity control formula, and obtains the corresponding limit humidity value based on the corresponding control formula and the received ambient temperature data, and controls the dehumidifier to perform dehumidification operations.

[0022] The specific control of the dehumidifier by the energy storage EMS includes: the enthalpy-humidity diagram is stored in the energy storage EMS, see Figure 2 As shown in the figure, the enthalpy-humidity diagram can represent the relationship between the ambient temperature and humidity and the dew point temperature under a certain atmospheric pressure. The energy storage EMS obtains the dew point temperature at the corresponding ambient temperature based on the enthalpy-humidity diagram 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 command to the dehumidifier that no dehumidification is required 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 dehumidifies according to the corresponding limit humidity value obtained previously.

[0023] Among them, the dehumidification process of the dehumidifier, see Figure 3As shown, including: 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. After six minutes of dehumidification, if the limit humidity value is still less than the current ambient humidity value, the dehumidifier continues to dehumidify. Once the limit humidity value is greater than or equal to the current humidity value, the dehumidifier turns off the dehumidification mode.

[0024] The present invention combines the dehumidification control system with the cold plate. By giving different temperature and humidity control strategies under different ambient temperature ranges corresponding to different cold plate surface temperature ranges, the energy storage EMS can realize real-time and precise control of the dehumidifier, ensuring that no condensation will occur on the surface of the cold plate in the energy storage cabinet, ensuring the safety and stability of the energy storage system operation, and avoiding excessive dehumidification, thereby reducing the energy consumption of the dehumidifier and increasing the service life of the dehumidifier.

[0025] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A dehumidification control system for an energy storage system, characterized in that: It includes an energy storage EMS, a temperature sensor arranged on the cold plate, a temperature and humidity tester arranged in 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 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 ambient temperature ranges. The energy storage EMS obtains the corresponding humidity control range according to the received ambient temperature data and the corresponding control formula, and controls the dehumidifier to perform dehumidification operations.

2. The dehumidification control system according to claim 1, characterized in that: The temperature and humidity control formula includes: A. The cold plate temperature is 17-20℃ 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°C, the control formula is, T=60-0.667X; B. The cold plate temperature is 20-23℃ 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°C, the control formula is, T=65-0.714X; C. The cold plate temperature is 23-26℃ 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°C, the control formula is, T=78-0.83X; Wherein, T represents the current ambient temperature, and X represents the limit humidity value at the current temperature, that is, the maximum relative humidity value allowed by the environment.

3. The dehumidification control system according to claim 1, characterized in that: The energy storage EMS stores a psychrometric diagram. The energy storage EMS obtains the dew point temperature in the corresponding environment according to the psychrometric diagram and the received ambient temperature and humidity. The energy storage EMS controls the start and stop of the dehumidifier by comparing the cold plate surface temperature and the dew point temperature.

4. The dehumidification control system according to claim 2, characterized in that: The energy storage EMS controls the dehumidifier including: 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 required; 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 a dehumidification operation according to the limit humidity value.

5. The dehumidification control system according to claim 1, characterized in that: The temperature sensor is arranged close to the surface of the cold plate, and each cold plate is provided with a temperature sensor. The data measured by each temperature sensor is transmitted to the energy storage EMS, and the energy storage EMS takes the average of all received temperature values ​​to obtain the surface temperature value of the cold plate.

6. The dehumidification control system according to claim 4, 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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