Energy storage system and dehumidification method and system thereof

Abstract

This application discloses an energy storage system and its dehumidification method / system. The dehumidification method includes: acquiring the external temperature of the energy storage system's enclosure; acquiring the internal temperature of the energy storage system's enclosure; and dehumidifying the energy storage system when the external temperature is higher than the internal temperature. By using the external and internal temperatures as inputs for monitoring condensate generation in the energy storage system, or as control variables for the dehumidification process, the confidence level of condensate generation monitoring and dehumidification is improved. If only the external relative humidity is used as the single input for monitoring condensate generation in the energy storage system, it may lead to missed monitoring of condensate generation, reducing the confidence level of condensate monitoring and dehumidification.

Description

Technical Field

[0001] This application relates to the field of energy storage, specifically to an energy storage system and its dehumidification method and system. Background Technology

[0002] Large-scale battery energy storage systems typically consist of multiple interconnected energy storage systems, each composed of one or more electrically connected battery cells. These battery cells are housed within the energy storage system's enclosure.

[0003] Because there are many electrical components inside the enclosure and the voltage level is high, when the air is humid and condensation occurs, the failure rate of the electrical components will increase, and the performance of the energy storage system will deteriorate. Summary of the Invention

[0004] In view of the above problems, this application provides an energy storage system and its dehumidification method and system to reduce the probability of condensation generation inside the energy storage system.

[0005] On the one hand, this application provides a dehumidification method for an energy storage system, comprising:

[0006] Obtain the external temperature of the energy storage system's enclosure;

[0007] Obtain the internal temperature of the energy storage system enclosure; when the external temperature is higher than the internal temperature, dehumidify the energy storage system.

[0008] By using external and internal temperatures as inputs for monitoring condensate generation in energy storage systems, or as control variables for dehumidification processes, the confidence level of condensate generation and dehumidification monitoring is improved. Using only external relative humidity as the sole input for monitoring condensate generation may lead to missed condensate generation, reducing the confidence level of condensate monitoring and dehumidification.

[0009] In some embodiments, when the external temperature is greater than the internal temperature, dehumidifying the energy storage system includes: obtaining the temperature difference between the external temperature and the internal temperature, and dehumidifying the energy storage system when the temperature difference is greater than a temperature threshold.

[0010] By using the temperature difference between the external and internal temperatures as one of the indicators for monitoring condensate generation in energy storage systems, the accuracy of monitoring condensate generation in energy storage systems can be further improved.

[0011] In some embodiments, it also includes:

[0012] The temperature difference between the external temperature and the internal temperature, as well as the first temperature threshold and the second temperature threshold, are obtained.

[0013] When t < V2, external dehumidification of the cabinet or internal dehumidification is stopped;

[0014] When V1>t≥V2, the internal humidity of the cabinet is dehumidified;

[0015] When t≥V1, increase the dehumidification power of the cabinet's interior, or simultaneously dehumidify both the interior and exterior of the cabinet;

[0016] Where t is the temperature difference, V1 is the first temperature threshold, and V2 is the second temperature threshold.

[0017] By setting a first humidity threshold and a second humidity threshold, and based on the numerical relationship between the temperature difference and the first and second humidity thresholds, corresponding internal dehumidification and / or external dehumidification are performed, taking into account both dehumidification power consumption and dehumidification effect.

[0018] In some embodiments, the method further includes: acquiring the internal relative humidity of the enclosure; and dehumidifying the energy storage system when the internal relative humidity of the enclosure is greater than a first humidity threshold.

[0019] By further considering the internal relative humidity, the accuracy of monitoring condensate formation can be improved.

[0020] In some embodiments, obtaining the internal relative humidity of the enclosure includes: obtaining the external relative humidity of the enclosure; obtaining the absolute humidity based on the external relative humidity; and obtaining the internal relative humidity based on the absolute humidity.

[0021] Obtaining internal relative humidity from external relative humidity reduces the need for additional hardware to acquire it, thus improving the utilization of existing hardware. It also increases the space utilization within the enclosure and enhances the energy density of the energy storage system.

[0022] In some embodiments, the internal relative humidity can be obtained from the external relative humidity using the following formula:

[0023] P2=(P1×P max1 ) / P max2

[0024] Where P2 is the internal relative humidity of the chamber, P1 is the external relative humidity of the chamber, and P... max1 P represents the saturation humidity corresponding to the current external temperature. max2 The saturation humidity corresponds to the current internal temperature.

[0025] In some embodiments, it also includes:

[0026] Obtain the external relative humidity of the enclosure;

[0027] When the external relative humidity of the enclosure exceeds the second humidity threshold, the energy storage system is dehumidified.

[0028] By using external relative humidity as an input for monitoring condensate generation, monitoring accuracy can be improved and / or dehumidification frequency can be reduced.

[0029] Secondly, this application provides a dehumidification system for an energy storage system, comprising: a first sensor for acquiring the external temperature of the energy storage system housing; a second sensor for acquiring the internal temperature of the energy storage system housing; and a dehumidifier for dehumidifying the energy storage system when the external temperature is greater than the internal temperature.

[0030] By acquiring external and internal temperatures using the first and second sensors respectively, the confidence level of monitoring condensate formation is improved, and the probability of condensate formation is reduced.

[0031] Thirdly, this application provides an energy storage system, including a dehumidification system. The dehumidification system includes a first sensor for acquiring the external temperature of the energy storage system's enclosure; a second sensor for acquiring the internal temperature of the energy storage system's enclosure; and a dehumidifier for dehumidifying the energy storage system when the external temperature is higher than the internal temperature. The energy storage system also includes an enclosure for housing one or more individual battery cells.

[0032] By employing the above dehumidification system, the accuracy of predicting condensation can be improved, facilitating precise and effective dehumidification. Integrating the dehumidification system into the energy storage system can increase its space utilization and energy density.

[0033] Fourthly, a computer device is provided, including a processor and a memory storing instructions, which, when executed by the processor, cause the processor to perform a dehumidification method for an energy storage system.

[0034] Fifthly, a computer-readable storage medium is provided, including instructions that, when executed by a computer, cause the computer to perform a dehumidification method for an energy storage system.

[0035] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0037] Figure 1 This is a schematic diagram of the structure of an energy storage system according to some embodiments of this application;

[0038] Figure 2 This is a schematic flowchart of a dehumidification method for an energy storage system according to some embodiments of this application;

[0039] Figure 3 This is a schematic flowchart of a dehumidification method for an energy storage system according to other embodiments of this application;

[0040] Figure 4 This is a schematic flowchart of a dehumidification method for an energy storage system according to other embodiments of this application;

[0041] Figure 5 This is a schematic flowchart of a dehumidification method for an energy storage system according to other embodiments of this application;

[0042] Figure 6 This is a flowchart illustrating a method for obtaining internal relative humidity according to some embodiments of this application;

[0043] Figure 7 This is a schematic diagram of the structure of a dehumidification system according to some embodiments of this application;

[0044] Figure 8 This is a schematic diagram of the structure of an energy storage system according to some embodiments of this application;

[0045] Figure 9 This is a schematic diagram of the structure of a dehumidification system according to other embodiments of this application;

[0046] Figure 10 This is a schematic diagram of the structure of an energy storage system according to some embodiments of this application;

[0047] Figure 11 This is a schematic diagram of the structure of a computer device according to some embodiments of this application.

[0048] The reference numerals in the detailed embodiments are as follows:

[0049] Energy storage system 1000; enclosure 100, individual unit 200, dehumidification system 300;

[0050] First sensor 301, second sensor 302, third sensor 303, fourth sensor 304, first processor 305, second processor 306, dehumidifier 401;

[0051] Computer device 5; memory 501, processor 502. Detailed Implementation

[0052] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0053] Unless otherwise defined, 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0054] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0055] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0057] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0058] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0059] Currently, the application of power batteries is becoming increasingly widespread, judging from market trends. Power batteries are not only widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, but also in energy storage systems for hydropower, thermal power, wind power, and solar power plants. With the increase in electricity consumption and the continuous expansion of applications such as peak and off-peak electricity demand regulation, the market demand for energy storage systems is also constantly increasing. The energy storage system disclosed in this application can store energy for power systems, for example, storing energy from photovoltaic, wind, tidal, and hydropower. During peak electricity demand periods, the energy storage system outputs the stored energy, and during off-peak periods, it inputs energy. This energy storage system can also be used for energy storage in automotive, residential, and industrial applications.

[0060] like Figure 1 As shown, a large-scale battery energy storage system or energy storage station typically comprises multiple interconnected energy storage systems 1000, each of which is electrically connected to one or more battery cells 200. One or more battery cells 200 are housed within a housing 100 of the energy storage system. The housing 100, for example, a closed-space shell, provides a sealed environment for the battery cells 200 to protect them. The housing 100 may be provided with ventilation holes, ventilation slots, or ventilation windows to connect and exchange internal and external air. The interior refers to the enclosed space within the housing 100, and the exterior refers to the portion of the housing 100 away from the enclosed space.

[0061] The higher the air temperature, the stronger its ability to hold moisture. Since the air inside and outside the energy storage system is interconnected, the actual amount of moisture held by the internal and external air is roughly the same. However, their moisture-holding capacities differ; higher-temperature air has a stronger moisture-holding capacity. For example, when the external temperature of the energy storage system is higher than the internal temperature, the external air has a relatively stronger moisture-holding capacity, and condensation may not form there. However, the internal air has a lower moisture-holding capacity than the external air, and condensation may form inside. The energy storage system 1000's enclosure 100 contains numerous electrical components and circuits at high voltage levels. When condensation forms inside, it increases the failure rate of these electrical components and circuits, degrading the performance of the energy storage system 1000.

[0062] In some embodiments of this application, the generation of condensate is predicted based on external and internal temperatures, and dehumidification is performed accordingly. Compared to methods that rely solely on external relative humidity to determine condensate generation, the embodiments of this application improve the confidence level of condensate generation detection, reducing the probability of missed condensate generation within the energy storage system. Confidence level, also known as reliability or accuracy, refers to the probability that condensate is about to be generated and detected. Lower confidence levels may cause performance degradation in the energy storage system. For example, if condensate is generated but not detected, it may accumulate and flow into the tank, causing corrosion of the tank and pipes, and / or water ingress into electrical components, short circuits, and malfunctions of functional devices. According to other embodiments of this application, condensate generation is further predicted based on internal relative humidity, further reducing the probability of condensate generation within the energy storage system.

[0063] like Figure 2 As shown in the embodiment of this application, a dehumidification method for an energy storage system is disclosed, including steps S1, S2 and S3. In steps S1 and S2, the external temperature T1 and the internal temperature T2 are obtained respectively. In step S3, when the external temperature T1 is greater than the internal temperature T2, the energy storage system is dehumidified.

[0064] In step S1: Obtain the external temperature T1 of the energy storage system's enclosure.

[0065] The external temperature of the enclosure 100 refers to either the external wall temperature of the enclosure 100 or the external air temperature, or the higher of the two. The external wall temperature is the surface temperature of the external wall of the enclosure 100, and the external air temperature is the air temperature outside the enclosure 100.

[0066] The external wall temperature and outside air temperature can be obtained from temperature sensors located on the outside of the enclosure, or the outside air temperature can be obtained by receiving local weather forecast information. For example, weather forecast information for the location of the energy storage system can be read through a gateway or processor.

[0067] In step S2: Obtain the internal temperature T2 of the energy storage system's enclosure.

[0068] The internal temperature T2 of the enclosure refers to the air temperature inside the enclosure and / or the temperature of the inner wall of the enclosure. This internal temperature T2 can be obtained from a temperature sensor installed inside the enclosure or on the inner wall. When both the air temperature and the inner wall temperature are obtained, the lower of the two can be taken as the internal temperature T2 of the enclosure.

[0069] As mentioned earlier, the ability of internal air to hold moisture varies at different temperatures. When the temperature of T2 is low, the ability to hold moisture is weaker, and the probability of condensation forming inside is higher.

[0070] For example, the enclosure is typically made of a material with good thermal conductivity, such as metal, resin, ceramic, or plastic. Because the temperature of the inner wall changes faster than the internal air temperature, condensation easily forms on the inner wall. By obtaining the temperature of the inner wall of the enclosure, the accuracy of monitoring condensation formation can be improved.

[0071] In step S3: when the external temperature T1 is greater than the internal temperature T2, the energy storage system is dehumidified.

[0072] Dehumidifying an energy storage system includes turning on the dehumidifier or increasing the dehumidification power.

[0073] From another perspective, dehumidifying an energy storage system can include dehumidifying the exterior and / or interior of the system enclosure. Typically, multiple energy storage systems 1000 are placed in a relatively large space, such as a container or room. Dehumidifying the exterior of the energy storage system 1000 is equivalent to dehumidifying that space. By reducing the moisture content of the external and / or internal air, the probability of air liquefaction and condensation in the energy storage system is reduced. For example, the exterior of the energy storage system enclosure can be dehumidified to reduce the moisture content in the external air. Because the internal and external air are connected, the moisture content in the internal air is also reduced. Alternatively, only the interior of the energy storage system enclosure can be dehumidified to reduce the moisture content in the internal air. Dehumidification can also be performed simultaneously on both the exterior and interior of the energy storage system enclosure, reducing the moisture content in both the external and internal air, and correspondingly increasing the rate of moisture reduction in the internal air.

[0074] In some embodiments, the energy storage system is dehumidified when the external temperature T1 is greater than the internal temperature T2. Because the internal air has a low moisture-carrying capacity, when T1 > T2, the internal air is highly likely to liquefy and generate condensate. This condensate can cause electrical component failures and degrade the performance of the energy storage system. For example, the accumulated condensate can form a conductive solution with impurities in the casing or air. This conductive solution can easily corrode the casing, causing corrosion, aging, and other material performance degradation, and may also cause short circuits in electrical components and their wiring.

[0075] According to other embodiments, when the external temperature T1 is significantly higher than the internal temperature T2, for example, when the external temperature T1 is higher than the internal temperature T2 by a temperature threshold V, dehumidification is performed on the energy storage system. In other words, the temperature difference t between the external temperature T1 and the internal temperature T2 is obtained, and dehumidification is performed on the energy storage system when the temperature difference t is greater than the temperature threshold V. Due to meteorological conditions or the heat generation and cooling conditions during the operation of the energy storage system, the external temperature T1 is usually higher than the internal temperature T2. However, the larger the temperature difference t, the greater the probability of condensation forming inside the enclosure. By setting a temperature threshold V, dehumidification is only performed when there is a high probability of condensation. This reduces the frequency of dehumidification while maintaining monitoring accuracy, thus saving energy.

[0076] The temperature threshold V can be set according to the material, thickness, and / or structural design of the enclosure. For example, if a metal enclosure typically produces condensation when the temperature difference between the inside and outside of the enclosure is 10 degrees Celsius, then the temperature threshold V can be set to 5 degrees Celsius, 8 degrees Celsius, or any value between 5 and 8 degrees Celsius. The lower the probability of condensation, the smaller the temperature threshold V should be.

[0077] According to some embodiments, multiple temperature thresholds can be set, and correspondingly, different dehumidification operations are performed in step S3 based on different temperature thresholds. Specifically, depending on different usage scenarios or to balance dehumidification power consumption and effect, different combinations of the above dehumidification operations are performed in step S3 when a certain temperature threshold is met. For example, two temperature thresholds are set: a first temperature threshold V1 and a second temperature threshold V2. The numerical relationship between V1 and V2 is: V1 ≥ V2. When t < V2, t is small, the internal and external temperatures are close, and the moisture-carrying capacity of the external and internal air is similar. The probability of condensation forming inside the cabinet is low, and the dehumidifier can perform dehumidification by only activating external dehumidification or stopping internal dehumidification, reducing internal dehumidification power consumption. As t increases, when V1 > t ≥ V2, the dehumidifier performs dehumidification by only activating internal dehumidification and stopping external dehumidification, reducing external dehumidification power consumption while maintaining dehumidification effect. As t continuously increases, and t≥V1, the difference in the moisture-carrying capacity between the external and internal air also increases. Accordingly, the dehumidifier's dehumidification operation involves increasing the dehumidification power inside the enclosure, or simultaneously dehumidifying both the inside and outside of the enclosure, to improve the dehumidification effect. External dehumidification involves dehumidifying the space between the exterior of the energy storage system and the interior of the energy storage station, thereby reducing the moisture content in this space.

[0078] Optionally, the dehumidification method disclosed in this application further includes step S4: when the external temperature T1 is less than or equal to the internal temperature T2, the dehumidifier stops dehumidifying or reduces its dehumidification power. When T1 ≤ T2, the external air's capacity to carry moisture is less than or equal to that of the internal air. Therefore, the probability of condensation forming inside the cabinet is lower than outside. At this time, the dehumidifier can switch to a stopped dehumidification state to reduce dehumidification energy consumption; or the dehumidifier can switch from a higher power state to a rated power state; or the dehumidifier can switch from a rated power state to a lower power state to achieve the purpose of reducing dehumidification power and energy consumption.

[0079] Unlike methods that rely solely on external relative humidity to determine condensation formation, this embodiment predicts condensation based on the cabinet's temperature. By simultaneously considering both the external temperature T1 and the internal temperature T2, particularly the difference between them, this embodiment improves the accuracy of predicting condensation formation. Because condensation can be detected in advance and dehumidification can be implemented, this embodiment reduces the probability of condensation forming inside the cabinet.

[0080] To further improve monitoring accuracy and dehumidification efficiency, the internal relative humidity of the enclosure can optionally be considered. Relative humidity characterizes the degree of water vapor saturation and is measured in percent (%). Correspondingly, such as... Figure 4 As shown, the dehumidification method disclosed in this application embodiment may further include step S5: obtaining the internal relative humidity P2 of the enclosure. When the internal relative humidity P2 of the enclosure is greater than the first humidity threshold V3, step S3 is performed to dehumidify the energy storage system. When the internal relative humidity P2 is less than or equal to the first humidity threshold V3, step S4 is performed to stop dehumidifying the energy storage system.

[0081] The internal relative humidity P2 can be obtained in several ways. For example, it can be obtained directly from a sensor located inside the enclosure. It can also be calculated based on the external relative humidity P1. Obtaining the internal relative humidity from the external relative humidity reduces the need for additional hardware to acquire the internal relative humidity and improves the utilization of the humidity sensor already located on the outside of the enclosure. When calculating the internal relative humidity from the external relative humidity, such as... Figure 6 As shown, step S5 may include steps S51 and S52.

[0082] Step S51: Obtain the external relative humidity P1 of the box from the humidity sensor located on the outside of the box.

[0083] Step S52: Obtain the absolute humidity W based on the external relative humidity P1. o And according to absolute humidity W o Obtain the internal relative humidity P2.

[0084] The water vapor content in the air can be expressed in several ways, including absolute humidity, relative humidity, and saturation humidity. Relative humidity is the ratio of absolute humidity to saturation humidity. When the water vapor content in the air reaches saturation, the relative humidity is 100%. Absolute humidity is the actual mass of water vapor carried per unit volume of air, i.e., the water vapor density in the air, measured in g / cm³. 3 Or kg / m 3 Saturated humidity refers to the maximum amount of water vapor that air can hold per unit volume at a specific temperature, measured in g / cm³. 3 Or kg / m 3 If this maximum limit is exceeded, the excess water vapor will liquefy and condense into water droplets, forming condensate. Saturation humidity is temperature-dependent; the higher the temperature, the greater the corresponding saturation humidity. The saturation humidity at a given temperature is a known constant.

[0085] As mentioned above, the internal relative humidity P2 is the ratio of absolute humidity to saturation humidity, which can be expressed as: P2 = W o / P max2 W o P represents absolute humidity. max2This represents the saturation humidity corresponding to the current internal temperature T2 (obtained in step S2). For example, absolute humidity W. o It is 580g / m 3 The current internal temperature T2 is 0°C, and its corresponding saturation humidity P... max2 1290g / cm 3 Based on the formula above, the internal relative humidity P2 is 44.96%.

[0086] The external absolute humidity W is obtained from the external relative humidity P1. o The methods include:

[0087] From P1 = W o / P max1 Relationship, obtain W o =P1×P max1 Wherein, P1 is obtained from a humidity sensor located outside the enclosure (see step S51), and the external saturation humidity P corresponding to the current external temperature T1 (obtained in step S1) is... max1 It is a known constant.

[0088] Furthermore, according to absolute humidity W o Methods for obtaining the internal relative humidity P2 include:

[0089] Since the air inside and outside the chamber is connected, the actual water vapor content of the air inside and outside is essentially the same. That is, the absolute humidity inside the chamber can be considered the same as the absolute humidity outside. Therefore, the aforementioned external absolute humidity W... o Substitute into the formula:

[0090] P2 = W o / P max2 The calculation yields: P2 = (P1 × P max1 ) / P max2 The internal saturated humidity P corresponding to the current internal temperature T2 (obtained in step S2) max2 It is a known constant.

[0091] When obtaining the internal relative humidity based on the external relative humidity, this embodiment calculates the internal relative humidity P2 based on the external temperature T1, internal temperature T2, and external relative humidity P1 of the enclosure. Because only a humidity sensor needs to be installed on the outside of the enclosure, eliminating the need for a separate humidity sensor inside, the number of humidity sensors is reduced, improving the utilization rate of the humidity sensors.

[0092] The first humidity threshold V3 can be set according to usage requirements, and the unit of measurement is %. For example, the more sensitive the energy storage system is to relative humidity, the lower the first humidity threshold can be set. For example, V3 can be set to percentages including, but not limited to, 70%, 75%, 80%, 85%, 90%, 95%, and 100%. When the value of V3 is set relatively high, for example, when the percentage is set to 85%, 90%, or 95%, the absolute humidity W... o With saturation humidity P max2 The difference between them is small. The higher the probability of condensation, the better. When V3 is set to 100%, that is, P... max2 and W o Both functions reduce the dehumidification response frequency, thus lowering the dehumidification system's response frequency and energy consumption. When the V3 value is set relatively low, for example, at a ratio of 70%, 75%, or 80%, dehumidification of the energy storage system can be performed before condensation occurs, further reducing the probability of condensation generation.

[0093] In some embodiments, multiple internal relative humidity thresholds can be configured. When different internal relative humidity thresholds are reached, different dehumidification operations are performed in step S3. For example, when the external temperature T1 of the cabinet is greater than the internal temperature T2, and the internal relative humidity P2 is greater than the first humidity threshold V3, the dehumidifier 401 can simultaneously dehumidify both the inside and outside of the cabinet at a higher power. More examples are not described here.

[0094] Optionally, the dehumidification operation in step S3 can employ one or more methods in any combination. For example, two humidity thresholds V are set. 31 and V 32 V 31 and V 32 The numerical relationship is: V 31 ≥V 32 When P2 < V 32 When P2 is small, the probability of condensation forming inside the cabinet is low. The dehumidifier can operate by only activating external dehumidification or stopping internal dehumidification, reducing internal dehumidification power consumption. As P2 increases, when V... 31 >t≥V 32 When the dehumidifier operates, it only dehumidifies the internal components of the unit, stopping external dehumidification. This reduces the power consumption of external dehumidification while maintaining effective dehumidification. As P2 continuously increases, P2 ≥ V 31 When a dehumidifier is in operation, it either increases the dehumidification power inside the cabinet or dehumidifies both the inside and outside of the cabinet simultaneously to improve the dehumidification effect.

[0095] To further improve monitoring accuracy and dehumidification efficiency, the external relative humidity of the enclosure can also be considered, optionally. For example... Figure 4 As shown, the dehumidification method disclosed in this application embodiment may further include step S6: obtaining the external relative humidity P1 of the enclosure. When the external relative humidity P1 of the enclosure is greater than the second humidity threshold V4, step S3 is performed to dehumidify the energy storage system. When the external relative humidity P1 is less than or equal to the second humidity threshold V4, step S4 is performed to stop dehumidifying the energy storage system.

[0096] The external relative humidity P1 can be obtained in several ways. For example, it can be obtained directly from a sensor located on the outside of the enclosure. It can also be calculated based on the internal relative humidity P2. The method for obtaining the external relative humidity P1 from the internal relative humidity P2 is detailed in the appendix. Figure 6 The logic of the method shown is the same, and will not be repeated here. In this case, because the humidity sensor is only installed inside the enclosure, the number of sensors can be reduced compared to installing sensors both inside and outside.

[0097] The second humidity threshold V4, measured in percent, can be set according to the usage scenario. For example, the more sensitive the energy storage system is to relative humidity, the lower the second humidity threshold can be set. The setting logic for the second humidity threshold V4 is the same as that for the first humidity threshold V3, and will not be repeated here.

[0098] When considering the external relative humidity P1, step S4 can employ any combination of the above dehumidification operations. For example, when the temperature difference between the external temperature T1 and the internal temperature T2 of the cabinet is greater than a temperature threshold, such as V1, and the external relative humidity P1 is greater than the second external relative humidity threshold, the dehumidifier 401 can simultaneously dehumidify both the inside and outside of the cabinet at a higher power operating state. More examples are not elaborated here.

[0099] In some embodiments, multiple external relative second humidity thresholds can be configured, and different dehumidification operations are performed in step S3 when different external relative second humidity thresholds are reached, for example, one or more different combinations thereof.

[0100] It should be noted that the execution order of steps S1 and S2 is not limited. The timing of steps S1 and S2 can be set to serial. Step S1 can be performed first, followed by step S2 (e.g., ...). Figure 3 (as shown), or, step S2 can be performed first, followed by step S1. The timing of steps S1 and S2 can also be set to be parallel.

[0101] Similarly, the timing of steps S5 and S6 can be set to be parallel. For example, the execution time of steps S5 and S6 can be the same or different.

[0102] In addition, the execution order of steps S1 and S2 for obtaining temperature and steps S5 and S6 for obtaining relative humidity is not restricted. They can be performed sequentially (i.e., in a specific order) or in parallel (e.g., in parallel). Figure 5 (As shown).

[0103] According to some embodiments, such as Figure 4 As shown, when the external temperature T1 is greater than the internal temperature T2, it can be determined whether the internal relative humidity P2 of the cabinet is greater than the first humidity threshold V3, and then S3 or S4 is executed based on the determination result. Dehumidification is only performed when both determination conditions are met simultaneously, which can reduce the dehumidification frequency and save energy. According to some other embodiments, even when the external temperature T1 is less than or equal to the internal temperature T2, it is still determined whether the internal relative humidity P2 of the cabinet is greater than the first humidity threshold V3, and then S3 or S4 is executed based on the determination result. This can reduce the missed detection rate of condensate formation under the condition that T1 is less than T2, and further improve the monitoring accuracy of condensate formation. Similarly, determining whether the external relative humidity P1 is greater than the second humidity threshold V4 can be performed regardless of whether the external temperature T1 is greater than the internal temperature T2. In other embodiments, relative humidity can be used as an independent input for monitoring condensate. That is, the dehumidification method can include only step S5; or S5 and S6. Although Figure 4 The instruction indicates that step S3 is executed as long as either P1 or P2 meets the corresponding relative humidity threshold. According to other embodiments of this application, step S3 can also be executed when both P1 and P2 simultaneously meet their respective relative humidity thresholds. In other words, the two branches of determining whether P1 is greater than or equal to V3 and determining whether P2 is greater than or equal to V4 can be executed in parallel or sequentially.

[0104] like Figure 7 As shown, a dehumidification system 300 for an energy storage system is provided, including: a first sensor 301 for acquiring the external temperature of the energy storage system housing, a second sensor 302 for acquiring the internal temperature of the energy storage system housing, and a dehumidifier 401.

[0105] For example, the temperature acquisition point of the first sensor 301 is set on the outside of the enclosure, and the temperature acquisition point of the second sensor 302 is set on the inside of the enclosure, so as to acquire the external temperature and the internal temperature respectively. The first sensor 301 and the second sensor 302 include a thermistor, which can sense temperature changes and acquire the magnitude of the temperature value.

[0106] For example, the dehumidifier 401 reads the external temperature T1 from the first sensor 301 and the internal temperature T2 from the second sensor 302, compares T1 and T2, and when T1 > T2, dehumidifies the energy storage system through the dehumidifier 401. The process of reading the external and internal temperatures and comparing them can be performed by the dehumidifier 401.

[0107] The dehumidifier 401 can be installed inside or outside the energy storage system enclosure. Alternatively, it can be installed both inside and outside the enclosure; for example, a portion of the dehumidifier 401 may be installed inside the enclosure, while a portion of the dehumidifier 401 may be installed outside the enclosure.

[0108] In some embodiments of this application, such as Figure 8 As shown, the dehumidification system 300 can be configured to cooperate with the energy storage system housing 100. The energy storage system housing 100 is provided with a mounting groove or mounting hole (not shown in the figure) for installing the dehumidification system, and the shape of the mounting groove or mounting hole matches the shape of the dehumidification system.

[0109] The dehumidifier 401 includes a turbine or air pump with adsorption, evaporation, and condensation functions. The inlet and outlet of the dehumidifier 401 are located inside and outside the housing 100, respectively. When the dehumidifier 401 is started or its power is increased—for example, by starting the air pump or turbine or increasing its operating power—the flow rate or velocity at the inlet and outlet increases. When the dehumidifier 401 is dehumidifying, the turbine or air pump drives the air inside the housing 100 to flow to the outside or from the outside to the inside. During the communication and flow between the internal and external air, the moisture carried by the internal air is adsorbed, evaporated, and condensed, reducing the moisture content of the internal air and achieving the purpose of dehumidifying the air inside the housing.

[0110] According to some embodiments, the dehumidifier 401 is used to receive an external temperature T1 and an internal temperature T2. The dehumidifier 401 also includes a second processor 306 for determining whether the external temperature T1 is greater than the internal temperature T2. When the external temperature T1 is greater than the internal temperature T2, or when the temperature difference between the two is greater than a temperature threshold, the second processor 306 is further used to instruct the turbine or air pump to perform dehumidification according to the aforementioned dehumidification method, stop dehumidification, or reduce the dehumidification power to the energy storage system.

[0111] According to other embodiments, in order to simplify the control logic and design of the dehumidifier 401, the second processor 306 may be a single entity physically independent of the dehumidifier 401. For example... Figure 9As shown, the second processor 306 is used to acquire the external temperature from the first sensor 301 and the internal temperature from the second sensor 302, and to determine whether the external temperature T1 is greater than the internal temperature T2. Based on the determination result, the second processor 306 controls the dehumidifier 401 to perform dehumidification, stop dehumidification, or reduce the dehumidification power to the energy storage system. Correspondingly, the dehumidifier 401 further controls its internal turbine or air pump.

[0112] When further considering internal and / or external relative humidity, the dehumidification system 300 also includes a third sensor 303 and / or a fourth sensor 304. The third sensor 303 is located inside the enclosure and is used to acquire the internal relative humidity of the enclosure. The fourth sensor 304 is located outside the enclosure and is used to acquire the external relative humidity of the enclosure. Correspondingly, the second processor 306 is used to receive the internal and / or external relative humidity and determine whether the internal or external relative humidity is greater than a corresponding first humidity threshold or a second humidity threshold. When the second processor 306 is physically separated from the dehumidifier 401, the second processor 306 is also used to control the dehumidifier 401 to execute step S3 or S4 based on the determination result. When the second processor 306 is part of the dehumidifier 401, the second processor 306 directly controls the turbine / air pump, which is also part of the dehumidifier 401, to execute step S3 or S4 based on the determination result.

[0113] In some embodiments, when the internal or external relative humidity is obtained through calculation, the dehumidifier 401 further includes a first processor 305 for performing corresponding calculations, such as executing step S52. The first processor 305 outputs the internal or external relative humidity to a second processor 306. The first processor 305 and the second processor 306 may be physically independent entities or integrated into a single physical entity.

[0114] It should be noted that the aforementioned temperature or humidity can be carried by analog signals. These analog signals can be amplified, filtered, and converted from analog to digital within the corresponding sensor to obtain the corresponding temperature or humidity values.

[0115] The first to fourth sensors 301-304 mentioned above can be physically independent entities, or any two or more of them can be integrated into a single physical entity. This integrated entity can be independent of the dehumidifier 401, or it may be part of the dehumidifier 401. For example, the third sensor 303 and the second sensor 302 can be configured as an integrated sensor, which can acquire temperature and the corresponding relative humidity. As another example, the fourth sensor 304 and the first sensor 301 can be configured as an integrated sensor, which can acquire temperature and the corresponding relative humidity.

[0116] Figure 10 As shown, in some embodiments of this application, an energy storage system is also provided. The energy storage system 1000 includes a dehumidification system 300 and a housing 100, wherein the dehumidification system 300 cooperates with the housing 100.

[0117] The dehumidification system 300 has the functions of temperature acquisition and dehumidification. For example, a first sensor is set to acquire the external temperature of the cabinet 100, and a second sensor is set to acquire the internal temperature of the cabinet 100. A dehumidifier is set in the dehumidification system to perform dehumidification operation.

[0118] The housing 100 contains one or more battery cells 200, which are used to input electrical energy and store the electrical energy in the form of chemical energy. The one or more battery cells 200 are connected in series or in parallel.

[0119] When the external temperature is higher than the internal temperature, the internal air of the enclosure 100 has a lower capacity to hold moisture than the external air. Even if no condensation occurs on the outside of the enclosure 100, condensation may occur inside the enclosure 100. Therefore, using the internal and external temperatures as control variables for the dehumidifier's dehumidification operation can improve the confidence level of condensation monitoring, drive the dehumidification process, and reduce the probability of condensation entering the enclosure or the energy storage system.

[0120] In other embodiments, in addition to using the internal temperature as an input for monitoring condensate generation, the dehumidification system may also be equipped with a relative humidity sensor. For example, a sensor for measuring external and / or internal relative humidity may be installed, using the internal relative humidity as an input for monitoring condensate generation, thereby improving the accuracy of condensate generation monitoring.

[0121] Corresponding to the dehumidification method for energy storage systems provided above, this application also provides a computer device. Please refer to... Figure 11 The computer device 11 in this embodiment includes: a memory 1101, and one or more processors 1102. Figure 11 (Only one is shown in the image) and a computer program stored in memory 1101 and executable on the processor. Memory 1101 stores software programs and units. The processor 1102 executes various functional applications and data processing by running the software programs and units stored in memory 1101 to obtain resources corresponding to the aforementioned preset events.

[0122] When the computer device is the server, the processor 1102 can implement the steps of the energy storage system dehumidification method applied to the server by running the computer program stored in the memory 1101, which will not be repeated here.

[0123] When the computer device is the client, the processor 1102 can implement the steps of the energy storage system dehumidification method applied to the client as described above by running the computer program stored in the memory 1101, which will not be repeated here.

[0124] It should be understood that, in the embodiments of this application, the processor 1102 may be a central processing unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), or application-specific integrated circuits.

[0125] Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor. Memory 1101 may include read-only memory and random access memory, and provides instructions and data to processor 1102. Some or all of memory 1101 may also include non-volatile random access memory. For example, memory 1101 may also store device category information.

[0126] Those skilled in the art will recognize that the algorithmic steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of external device software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0127] In the embodiments provided in this application, it should be understood that the disclosed systems and methods can be implemented in other ways. If the integrated units described above are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing associated hardware. The computer program described above can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program described above includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable storage medium described above can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer-readable storage devices, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the contents of the aforementioned computer-readable storage media may be appropriately added to or subtracted from the contents according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media may not include electrical carrier signals and telecommunication signals.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A dehumidification method for an energy storage system, characterized in that, include: Obtain the external temperature of the energy storage system's enclosure; Obtain the internal temperature of the energy storage system's enclosure; When the external temperature is greater than the internal temperature, the energy storage system is dehumidified; wherein, the dehumidification operation includes: turning on the dehumidifier, or increasing the dehumidification power; The dehumidification method for the energy storage system further includes: The temperature difference between the external temperature and the internal temperature, as well as a first temperature threshold and a second temperature threshold, are obtained. When t < V2, external dehumidification of the enclosure or internal dehumidification is stopped; When V1>t≥V2, the box is dehumidified internally; When t≥V1, increase the dehumidification power of the inside of the box, or simultaneously dehumidify the inside and outside of the box; where t is the temperature difference, V1 is the first temperature threshold, and V2 is the second temperature threshold.

2. The dehumidification method for an energy storage system according to claim 1, characterized in that, When the external temperature is greater than the internal temperature, the energy storage system is dehumidified, including: The temperature difference between the external temperature and the internal temperature is obtained, and when the temperature difference is greater than a temperature threshold, the energy storage system is dehumidified.

3. The dehumidification method for an energy storage system according to any one of claims 1 to 2, characterized in that, Also includes: Obtain the internal relative humidity of the enclosure; When the relative humidity inside the enclosure is greater than a first humidity threshold, the energy storage system is dehumidified.

4. The dehumidification method for an energy storage system according to any one of claims 1 to 2, characterized in that, Also includes: Obtain the external relative humidity of the enclosure; The absolute humidity is obtained based on the external relative humidity, and the internal relative humidity is obtained based on the absolute humidity; When the relative humidity inside the enclosure is greater than a first humidity threshold, the energy storage system is dehumidified.

5. The dehumidification method for an energy storage system according to any one of claims 1 to 4, characterized in that, The internal relative humidity satisfies: P2=(P1×P max1 ) / P max2 Where P1 is the external relative humidity corresponding to the external temperature, P max1 The saturation humidity corresponding to the external temperature; P2 is the internal relative humidity corresponding to the internal temperature. max2 The saturation humidity corresponds to the internal temperature.

6. The dehumidification method for an energy storage system according to any one of claims 1 to 5, characterized in that, Also includes: Obtain the external relative humidity of the enclosure; When the external relative humidity of the enclosure is greater than the second humidity threshold, the energy storage system is dehumidified.

7. A dehumidification system for an energy storage system, characterized in that, include: The first sensor is used to acquire the external temperature of the energy storage system's enclosure. The second sensor is used to obtain the internal temperature of the energy storage system's enclosure. A dehumidifier is used to dehumidify the energy storage system when the external temperature is higher than the internal temperature; wherein the dehumidification operation includes: turning on the dehumidifier or increasing the dehumidification power; The dehumidification system is also used for: The temperature difference between the external temperature and the internal temperature, as well as a first temperature threshold and a second temperature threshold, are obtained. When t < V2, external dehumidification of the enclosure or internal dehumidification is stopped; When V1>t≥V2, the box is dehumidified internally; When t≥V1, increase the dehumidification power of the inside of the box, or simultaneously dehumidify the inside and outside of the box; where t is the temperature difference, V1 is the first temperature threshold, and V2 is the second temperature threshold.

8. An energy storage system, characterized in that, include: A dehumidification system, wherein the dehumidification system includes: The first sensor is used to acquire the external temperature of the energy storage system's enclosure. The second sensor is used to obtain the internal temperature of the energy storage system's enclosure. A dehumidifier is used to dehumidify the energy storage system when the external temperature is higher than the internal temperature; wherein the dehumidification operation includes: turning on the dehumidifier or increasing the dehumidification power; The energy storage system is also used for: The temperature difference between the external temperature and the internal temperature, as well as a first temperature threshold and a second temperature threshold, are obtained. When t < V2, external dehumidification of the enclosure or internal dehumidification is stopped; When V1>t≥V2, the box is dehumidified internally; When t≥V1, increase the dehumidification power of the inside of the box, or simultaneously dehumidify the inside and outside of the box; where t is the temperature difference, V1 is the first temperature threshold, and V2 is the second temperature threshold. The energy storage system also includes: The enclosure is used to house one or more individual battery cells.

9. A computer device, characterized in that, It includes a processor and a memory storing instructions, which, when executed by the processor, cause the processor to perform the method according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that, Includes instructions that, when executed by a computer, cause the computer to perform the method described in any one of claims 1 to 6.

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