Energy storage system and dehumidification method and system thereof

Abstract

The invention discloses an energy storage system and a dehumidification method and system thereof. The dehumidification method of the energy storage system comprises the steps that the external temperature of a box body of the energy storage system is obtained; obtaining the internal temperature of a box body of the energy storage system; and when the external temperature is higher than the internal temperature, the energy storage system is dehumidified. The external temperature and the internal temperature are used as the input quantity for monitoring the generation of the condensate water of the energy storage system or the control variable for the dehumidification treatment of the energy storage system, so that the confidence coefficient for monitoring the generation of the condensate water and the dehumidification treatment is improved. If only the external relative humidity is used as a single input quantity for monitoring the generation of the condensate water of the energy storage system, the generation of the condensate water of the energy storage system may be missed in monitoring, and the confidence coefficient of condensate water monitoring and dehumidification processing is reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage, and specifically to an energy storage system and a dehumidification method and system thereof. Background Art

[0002] Large battery energy storage systems usually include multiple energy storage systems connected to each other, each energy storage system is formed by one or more battery cells electrically connected. One or more battery cells are arranged in the box of the energy storage system.

[0003] Since there are many electrical components in the box and the voltage level is high, when the air is humid and condensation water is generated, the failure rate of the electrical components will increase, deteriorating the performance of the energy storage system. Summary of the invention

[0004] In view of the above problems, the present application provides an energy storage system and a dehumidification method and system thereof to reduce the probability of condensation water generation in the box of the energy storage system.

[0005] In one aspect, the present application provides a method for dehumidifying an energy storage system, comprising:

[0006] Obtaining the external temperature of the energy storage system box;

[0007] The internal temperature of the energy storage system box is obtained; when the external temperature is greater than the internal temperature, the energy storage system is dehumidified.

[0008] By using the external temperature and the internal temperature as inputs for monitoring the generation of condensed water in the energy storage system, or as control variables for the dehumidification of the energy storage system, the confidence in monitoring the generation of condensed water and the dehumidification is improved. If only the external relative humidity is used as a single input for monitoring the generation of condensed water in the energy storage system, the generation of condensed water in the energy storage system may be missed, reducing the confidence in the monitoring and dehumidification of condensed water.

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

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

[0011] In some embodiments, it also includes:

[0012] Acquire a temperature difference between an external temperature and an internal temperature, and a first temperature threshold and a second temperature threshold;

[0013] When t<V 2When the cabinet is dehumidified externally or the internal dehumidification is stopped;

[0014] When V 1 >t≥V 2 When the cabinet is dehumidified;

[0015] When t ≥ V 1 When the temperature is low, the power of dehumidifying the interior of the box is increased, or the interior and exterior of the box are dehumidified at the same time;

[0016] Where t is the temperature difference, V 1 is the first temperature threshold, V 2 is the second temperature threshold.

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

[0018] In some embodiments, it also includes: obtaining the internal relative humidity of the box; when the internal relative humidity of the box is greater than a first humidity threshold, dehumidifying the energy storage system.

[0019] By further taking the internal relative humidity into account, the accuracy of monitoring condensation generation can be improved.

[0020] In some embodiments, obtaining the internal relative humidity of the box includes: obtaining the external relative humidity of the box; obtaining the absolute humidity according to the external relative humidity, and obtaining the internal relative humidity according to the absolute humidity.

[0021] By obtaining the internal relative humidity based on the external relative humidity, the additional hardware used to obtain the internal relative humidity can be reduced, and the utilization rate of the configured hardware can be improved. It can also improve the space utilization rate inside the box and the energy density of the energy storage system.

[0022] In some embodiments, the following formula can be used to obtain the internal relative humidity based on the external relative humidity:

[0023] P 2 =(P 1 ×P max1 ) / P max2

[0024] Among them, P 2 is the relative humidity inside the box, P 1 is the external relative humidity of the box, P max1 is the saturated humidity corresponding to the current external temperature, P max2 is the saturated humidity corresponding to the current internal temperature.

[0025] In some embodiments, it also includes:

[0026] Get the external relative humidity of the box;

[0027] When the external relative humidity of the box is greater than the second humidity threshold, the energy storage system is dehumidified.

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

[0029] In a second aspect, the present application provides a dehumidification system for an energy storage system, comprising: a first sensor for obtaining the external temperature of a box of the energy storage system; a second sensor for obtaining the internal temperature of the box of the energy storage system; and a dehumidifier for dehumidifying the energy storage system when the external temperature is greater than the internal temperature.

[0030] By acquiring the external temperature and the internal temperature respectively through the first sensor and the second sensor, the confidence of monitoring the generation of condensed water is improved and the probability of generating condensed water is reduced.

[0031] In a third aspect, the present application provides an energy storage system, including a dehumidification system, wherein the dehumidification system includes a first sensor for obtaining an external temperature of a box of the energy storage system; a second sensor for obtaining an internal temperature of the box of the energy storage system; and a dehumidifier for dehumidifying the energy storage system when the external temperature is greater than the internal temperature. The energy storage system also includes a box for accommodating one or more battery cells.

[0032] By adopting the above dehumidification system, the accuracy of predicting the occurrence of condensed water can be improved, so as to facilitate accurate and effective dehumidification. By integrating the dehumidification system into the energy storage system, the space utilization rate of the energy storage system can be improved, and the energy density of the energy storage system can be increased.

[0033] In a fourth aspect, a computer device is provided, comprising a processor and a memory storing instructions, wherein when the instructions are executed by the processor, the processor executes a method for dehumidifying an energy storage system.

[0034] In a fifth aspect, a computer-readable storage medium is provided, comprising instructions, which, when executed by a computer, enable the computer to execute a method for dehumidifying an energy storage system.

[0035] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0037] Figure 1 A schematic diagram of the structure of an energy storage system in some embodiments of the present application;

[0038] Figure 2 A schematic diagram of a dehumidification method for an energy storage system according to some embodiments of the present application;

[0039] Figure 3 A schematic flow chart of a dehumidification method for an energy storage system according to some other embodiments of the present application;

[0040] Figure 4 A schematic flow chart of a dehumidification method for an energy storage system according to some other embodiments of the present application;

[0041] Figure 5 A schematic flow chart of a dehumidification method for an energy storage system according to some other embodiments of the present application;

[0042] Figure 6 A schematic flow chart of a method for obtaining internal relative humidity in some embodiments of the present application;

[0043] Figure 7 This is a schematic diagram of the structure of a dehumidification system in some embodiments of the present application;

[0044] Figure 8 A schematic diagram of the structure of an energy storage system in some embodiments of the present application;

[0045] Fig. 9 It is a structural schematic diagram of a dehumidification system in some other embodiments of the present application;

[0046] Fig.10 A schematic diagram of the structure of an energy storage system in some embodiments of the present application;

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

[0048] The reference numerals in the specific implementation manner are as follows:

[0049] Energy storage system 1000; box 100, monomer 200, dehumidification system 300;

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

[0051] Computer device 5; memory 501, processor 502. DETAILED DESCRIPTION

[0052] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0054] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0055] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0057] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0058] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, but also in energy storage systems such as hydropower, thermal power, wind power, and solar power stations. With the increase in electricity consumption capacity and the continuous expansion of application fields such as the allocation of peak and trough electricity consumption, the market demand for energy storage systems is also constantly expanding. The energy storage system disclosed in the embodiment of the present application can store energy for the power system. For example, the energy of photovoltaic, wind, tidal, and hydropower is stored in the energy storage system. When the power consumption of the power system is at its peak, the energy storage system outputs the stored energy, and when the power consumption of the power system is at its low point, the energy storage system inputs the energy. The energy storage system can also store energy for application scenarios such as automotive, household, and industrial.

[0060] like Figure 1 As shown, a large battery energy storage system or energy storage station usually includes a plurality of energy storage systems 1000 connected to each other, and each energy storage system 1000 is formed by electrically connecting one or more battery cells 200. One or more battery cells 200 are arranged in a box 100 of the energy storage system. The box 100, such as a shell with a closed space, provides a closed environment for the battery cells 200 to protect the battery cells 200. The box 100 may be provided with ventilation holes, ventilation slots or ventilation windows for connecting and exchanging the internal air of the box with the external air, wherein the interior is the part of the closed space in the box 100, and the exterior is the part away from the closed space of the box 100.

[0061] The higher the air temperature, the stronger its ability to carry moisture. Since the air inside and outside the energy storage system is in a connected state, the actual amount of moisture carried by the internal and external air is basically the same, but the internal and external air have different abilities to carry moisture. The higher the air temperature, the stronger its ability to carry moisture. For example, when the external temperature of the energy storage system is greater than the internal temperature, the external air of the energy storage system has a relatively strong ability to carry moisture, and condensed water may not be generated outside. However, the internal air has a lower ability to carry moisture than the external air, and condensed water may be generated inside. A large number of electrical components and circuits are arranged in the box 100 of the energy storage system 1000, and the voltage level is relatively high. When condensed water is generated inside, the failure rate of the electrical components and circuits will increase, deteriorating the performance of the energy storage system 1000.

[0062] In some embodiments of the present application, the generation of condensed water is predicted based on the external temperature and the internal temperature, and dehumidification is performed. Compared with the method of judging whether condensed water is generated only based on the external relative humidity, the embodiments of the present application improve the confidence of monitoring the generation of condensed water and reduce the probability of missed detection of condensed water generation inside the energy storage system. Confidence, which can also be called reliability, or accuracy / precision, refers to the probability that condensed water is about to be generated and monitored. A lower confidence level may cause the performance of the energy storage system to deteriorate. For example, when the energy storage system generates condensed water but it is not monitored, the generated condensed water may gather and flow into the interior of the box, causing corrosion of the box and pipelines, and / or water ingress and short circuit of electrical components, failure of functional components, and other problems. According to other embodiments of the present application, the generation of condensed water is further predicted based on the internal relative humidity to further reduce the probability of condensed water generation inside the energy storage system.

[0063] like Figure 2 As shown, the embodiment of the present application discloses a dehumidification method for an energy storage system, including: step S1, step S2 and step S3, in which the external temperature T is obtained in step S1 and step S2 respectively. 1 and internal temperature T 2 In step S3, when the external temperature T 1 Greater than the internal temperature T 2 When the humidity is low, the energy storage system is dehumidified.

[0064] In step S1: obtaining the external temperature T of the energy storage system box 1 .

[0065] The external temperature of the housing 100 refers to one or a higher one of the outer wall temperature of the housing 100 or the external air temperature, wherein the outer wall temperature is the surface temperature of the outer wall of the housing 100 and the external air temperature is the air temperature outside the housing 100 .

[0066] The outer wall temperature and the outside air temperature can be obtained from a temperature sensor disposed outside the box, or the outside air temperature can be obtained by receiving a push notification of the local weather forecast. For example, the weather forecast information of the location of the energy storage system can be read through a gateway or a processor.

[0067] In step S2: obtaining the internal temperature T of the energy storage system box 2 .

[0068] The internal temperature of the box is T 2 Refers to the internal air temperature of the box, and / or obtains the inner wall temperature of the box. The internal temperature T 2 It can be obtained from a temperature sensor set inside the box or on the inner wall. When both the internal air temperature and the inner wall temperature are obtained, the lower one of the two can be used as the internal temperature T of the box. 2 .

[0069] As mentioned above, the capacity of the internal air to carry moisture varies at different temperatures. 2 When the temperature is low, the ability to carry moisture is weaker and the probability of condensation water forming inside is higher.

[0070] For example, the box is generally 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 water is easily generated on the inner wall. By obtaining the inner wall temperature of the box, the accuracy of monitoring the generation of condensation water can be improved.

[0071] In step S3: When the external temperature T 1 Greater than the internal temperature T 2 When the humidity is low, the energy storage system is dehumidified.

[0072] The operation of dehumidifying the energy storage system includes: starting the dehumidifier to dehumidify, or increasing the dehumidification power.

[0073] From another perspective, the operation of dehumidifying the energy storage system may include dehumidifying the outside of the energy storage system's box and / or dehumidifying the inside of the box. Generally, multiple energy storage systems 1000 will be placed in a relatively large space, such as a container, or a room. When the outside of the energy storage system 1000 is dehumidified, it is equivalent to dehumidifying the space. By reducing the amount of moisture carried by the external and / or internal air, the probability of air liquefaction and condensed water in the energy storage system is reduced. For example, the outside of the box of the energy storage system can be dehumidified to reduce the amount of moisture in the external air. Since the internal and external air are connected, the amount of moisture in the internal air is reduced. Only the inside of the box of the energy storage system can be dehumidified to reduce the amount of moisture in the internal air. It is also possible to dehumidify the inside and outside of the box of the energy storage system at the same time, while reducing the amount of moisture carried by the external and internal air of the energy storage system, and correspondingly increase the rate of reduction of the amount of moisture in the internal air.

[0074] According to some embodiments, when the external temperature T 1 Greater than the internal temperature T 2 When T 1 >T 2 When the temperature is too low, it means that the air inside is likely to liquefy and generate condensed water. Condensed water may cause electrical component failure and deteriorate the performance of the energy storage system. For example, the collected condensed water will form a conductive solution with impurities in the box or air. This conductive solution not only easily corrodes the box, causing corrosion, aging and other material performance degradation, but may also cause short circuits in electrical components and their circuits.

[0075] According to other embodiments, when the external temperature T 1 Greater than the internal temperature T 2 When it reaches a certain level, such as the external temperature T 1 T 2 When the temperature reaches the temperature threshold V, the energy storage system is dehumidified. In other words, the external temperature T 1 With internal temperature T 2 When the temperature difference t is greater than the temperature threshold V, the energy storage system is dehumidified. Affected by meteorological conditions, or heating and cooling conditions during the operation of the energy storage system, the external temperature T 1 Higher than the internal temperature T 2 However, the greater the temperature difference t, the greater the probability of condensation water being generated inside the box. By setting the temperature threshold V, dehumidification is performed only when there is a high probability of condensation water. While taking into account the accuracy of monitoring, the frequency of dehumidification can be reduced to save energy.

[0076] The temperature threshold V can be set according to the material, thickness and / or structural design of the box. Assuming that a metal box generally generates condensed water when the temperature difference between the inside and outside of the box is 10 degrees Celsius, 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 condensed water, the smaller the temperature threshold V is set.

[0077] According to some embodiments, multiple temperature thresholds may be set, and correspondingly, different dehumidification operations may be taken in step S3 according to different temperature thresholds. Specifically, in response to different usage scenario requirements, or taking into account the dehumidification power consumption and effect, different combinations of the above dehumidification operations may be taken in step S3 when a certain temperature threshold is met. For example, two temperature thresholds are set, the first temperature threshold V 1 and the second temperature threshold V 2 . V 1 and V 2 The numerical relationship is: V 1 ≥V 2 When t<V 2 When t is small, the internal temperature is close to the external temperature, the moisture carrying capacity of the external and internal air is similar, and the probability of condensation water generation inside the box is low. The dehumidifier can only start the external dehumidification of the box or stop the internal dehumidification to reduce the internal dehumidification power consumption. As t increases, when V 1 >t≥V 2 When t continues to increase, t≥V 1 When the moisture carrying capacity of the external and internal air increases, the difference becomes larger. Accordingly, the dehumidifier performs dehumidification by increasing the power of dehumidifying the inside of the box, or dehumidifying the inside and outside of the box at the same time to improve the dehumidification effect. Among them, external dehumidification is to dehumidify the space between the outside of the energy storage system and the inside of the energy storage station, which can reduce the moisture content of the space between the outside of the box of the energy storage system and the inside of the energy storage station.

[0078] Optionally, the dehumidification method disclosed in the embodiment of the present application further includes step S4, when the external temperature T 1 Less than or equal to the internal temperature T 2 When T 1 ≤T 2When the moisture content of the external air is less than or equal to that of the internal air, the probability of condensation water being generated inside the cabinet is lower than that outside the cabinet. At this time, the dehumidifier can switch the state to stop dehumidification to reduce the energy consumption of dehumidification; or the dehumidifier can switch the state from a higher power state to a rated power state; or the dehumidifier can switch the state from a rated power state to a lower power state to achieve the purpose of reducing dehumidification power and energy consumption.

[0079] Different from the method of judging whether condensed water is generated only based on the external relative humidity, the embodiment of the present application predicts the generation of condensed water based on the temperature of the box. 1 and internal temperature T 2 Two factors, especially the external temperature T 1 The difference between the internal temperature T and the internal temperature T, the embodiment of the present application improves the accuracy of predicting the generation of condensed water. Because the generation of condensed water can be monitored in advance and dehumidification can be performed, the embodiment of the present application reduces the probability of condensed water being generated inside the box.

[0080] In order to further improve the monitoring accuracy and dehumidification efficiency, the relative humidity inside the box can be further considered. Relative humidity is used to indicate how high the saturation of water vapor is, and the unit of measurement is %. Correspondingly, Figure 4 As shown, the dehumidification method disclosed in the embodiment of the present application may also include step S5: obtaining the internal relative humidity P of the box 2 When the relative humidity inside the box is P 2 Greater than the first humidity threshold V 3 When the internal relative humidity P 2 Less than or equal to the first humidity threshold V 3 When the dehumidification of the energy storage system is stopped, the above step S4 is executed.

[0081] Internal relative humidity P 2 It can be obtained in many ways. For example, it can be directly obtained from a sensor set inside the box. It can also be obtained based on the external relative humidity P 1 Calculated. Obtaining the internal relative humidity based on the external relative humidity can reduce the additional hardware used to obtain the internal relative humidity and improve the utilization rate of the humidity sensor installed outside the box. When the internal relative humidity is calculated based on the external relative humidity, such as Figure 6 As shown, step S5 may include step S51 and step S52.

[0082] Step S51: Obtain the external relative humidity P of the box from the humidity sensor disposed outside the box. 1 .

[0083] Step S52: According to the external relative humidity P 1 Get the absolute humidity W o , and according to the absolute humidity W o Get the internal relative humidity P 2 .

[0084] There are many ways to express the water vapor content in the air, including absolute humidity, relative humidity, and saturated humidity. Among them, relative humidity is the ratio of absolute humidity to saturated humidity. When the water vapor in the air reaches saturated humidity, its relative humidity is 100%. Absolute humidity is the actual water vapor mass carried by the air per unit volume, that is, the water vapor density in the air, and the unit of measurement is g / cm 3 or kg / m 3 Saturated humidity refers to the maximum amount of water vapor carried by air per unit volume at a specific temperature, measured in g / cm 3 or kg / m 3 If this maximum limit is exceeded, the excess water vapor will liquefy and condense into water droplets, forming condensed water. Saturated humidity is related to temperature. The higher the temperature, the greater the corresponding saturated humidity. The saturated humidity corresponding to a certain temperature is a known constant.

[0085] As mentioned above, the internal relative humidity P 2 It is the ratio of absolute humidity to saturated humidity, which can be expressed as: P 2 =W o / P max2 , where W o Represents absolute humidity, P max2 Indicates the current internal temperature T 2 The saturated humidity corresponding to (obtained in step S2). For example, the absolute humidity W o 580g / m 3 Current internal temperature T 2 is 0℃, and its corresponding saturated humidity P max2 1290g / cm 3 According to the above formula, the internal relative humidity P 2 That is 44.96%.

[0086] According to the external relative humidity P 1 Get the external absolute humidity W o The methods include:

[0087] By P 1 =W o / P max1 relationship, obtain W o =P 1 ×P max1 , where P 1is obtained from the humidity sensor set outside the box (see step S51), the current external temperature T 1 The corresponding external saturated humidity P (obtained in step S1) max1 is a known constant.

[0088] Furthermore, according to the absolute humidity W o Get the internal relative humidity P 2 The methods include:

[0089] Since the air inside and outside the box is connected, the actual water vapor carried by the air inside and outside is basically the same. That is, the absolute humidity inside the box can be regarded as the same as the absolute humidity outside. Therefore, the above-mentioned absolute humidity outside W o Substitute into the formula:

[0090] P 2 =W o / P max2 , we can calculate: P 2 =(P 1 ×P max1 ) / P max2 , where the current internal temperature T2 (obtained in step S2) corresponds to the internal saturated humidity P max2 is a known constant.

[0091] When the internal relative humidity is obtained according to the external relative humidity, this embodiment realizes the external temperature T of the box. 1 , internal temperature T 2 and external relative humidity P 1 Calculate the internal relative humidity P 2 Because it is only necessary to set the humidity sensor outside the box, and it is not necessary to set the humidity sensor inside the box, the number of humidity sensors is reduced and the utilization rate of the humidity sensors is improved.

[0092] The first humidity threshold V 3 It can be set according to the usage requirements, and the unit of measurement is %. For example, when the energy storage system is more sensitive to relative humidity, a smaller first humidity threshold can be set. For example, V 3 The ratios can be set to include but are not limited to: 70%, 75%, 80%, 85%, 90%, 95%, 100%, etc. 3 When the value of is set relatively high, for example, when the ratio is set to 85%, 90%, 95%, etc., the absolute humidity W o and saturated humidity P max2 The smaller the difference between them, the higher the probability of condensation. 3 The value of P is set to 100%, that is, max2 and W oThe two are the same, which can reduce the response frequency of dehumidification, so that the response frequency of the dehumidification system and the energy consumption of work are reduced. 3 When the numerical value is set relatively low, for example, when the ratio is set to 70%, 75%, 80%, etc., the energy storage system can be dehumidified in advance before condensation occurs, thereby greatly reducing the probability of condensation in the energy storage system.

[0093] In some embodiments, multiple first relative humidity thresholds can be configured. When different relative humidity thresholds are reached, different dehumidification operations are performed in step S3. For example, when the external temperature T 1 Greater than the internal temperature T 2 , and the internal relative humidity P 2 Greater than the first humidity threshold V 3 When the dehumidifier 401 is in a high power working state, it can dehumidify the inside and outside of the box at the same time. More examples will not be repeated here.

[0094] Optionally, the dehumidification operation in step S3 may adopt any combination of one or more. For example, two humidity thresholds V 31 and V 32 , V 31 and V 32 The numerical relationship is: V 31 ≥V 32 When P 2 <V 32 When P 2 The probability of condensation water generation inside the box is low, and the dehumidifier can only start the external dehumidification of the box or stop the internal dehumidification to reduce the internal dehumidification power consumption. 2 Increase, when V 31 >t≥V 32 When P is , the dehumidifier only dehumidifies the inside of the cabinet, stops external dehumidification, and reduces the external dehumidification power consumption while taking into account the dehumidification effect. 2 Continued increase, P 2 ≥V 31 When the dehumidifier is used, the dehumidification operation is to increase the power of dehumidifying the inside of the box, or to dehumidify the inside and outside of the box at the same time to improve the dehumidification effect.

[0095] In order to further improve the monitoring accuracy and dehumidification efficiency, the external relative humidity of the cabinet can be further considered. Figure 4 As shown, the dehumidification method disclosed in the embodiment of the present application may also include step S6: obtaining the external relative humidity P of the box 1 When the external relative humidity P of the box 1 Greater than the second humidity threshold V4 When the external relative humidity P 1 Less than or equal to the second humidity threshold V 4 When the dehumidification of the energy storage system is stopped, the above step S4 is executed.

[0096] External relative humidity P 1 It can be obtained in many ways. For example, it can be directly obtained from a sensor set outside the box. It can also be obtained based on the internal relative humidity P 2 Calculated. According to the internal relative humidity P 2 Get the external relative humidity P 1 Methods and attachments Figure 6 The logic of the method shown is the same and will not be described again. At this time, because the humidity sensor is only arranged inside the box, the number of sensors can be reduced compared with arranging sensors inside and outside at the same time.

[0097] The second humidity threshold V 4 The unit of measurement is %, which can be set according to the usage scenario. For example, when the energy storage system is more sensitive to relative humidity, a smaller second humidity threshold can be set. The second humidity threshold V 4 The setting logic and the first humidity threshold V 3 The same is not repeated here.

[0098] When further considering the external relative humidity P 1 When the temperature outside the cabinet is T 1 With internal temperature T 2 The temperature difference is greater than the temperature threshold, for example, V 1 , and the external relative humidity P 1 When the relative humidity is greater than the second external humidity threshold, the dehumidifier 401 can dehumidify the inside and outside of the box at the same time in a high power working state. More examples will not be repeated here.

[0099] In some embodiments, multiple external relative second humidity thresholds may be configured. When different external relative second humidity thresholds are reached, different dehumidification operations are taken in step S3, for example, different combinations of one or more.

[0100] It should be noted that the execution order of step S1 and step S2 is not limited. The timing of step S1 and step S2 can be set to be serial. Step S1 is performed first, and then step S2 (such as Figure 3 Alternatively, step S2 is performed first and then step S1. The timing of step S1 and step S2 can also be set to be parallel.

[0101] Similarly, the timing of the above step S5 and step S6 can be set to be in parallel. For example, the time nodes or moments of executing step S5 and step S6 can be the same or different.

[0102] In addition, the execution order of steps S1 and S2 for obtaining the temperature and steps S5 and S6 for obtaining the relative humidity is not limited. They can be sequential in time, that is, in order of precedence, or they can be parallel in time (e.g. Figure 5 shown).

[0103] According to some embodiments, Figure 4 As shown, when the external temperature T1 is greater than the internal temperature T2, the internal relative humidity P of the box can be judged. 2 Is it greater than the first humidity threshold V 3 , and then execute S3 or S4 according to the judgment result. Dehumidification is performed only when both judgment conditions are met at the same time, which can reduce the dehumidification frequency and save energy. According to other embodiments, even if the external temperature T1 is less than or equal to the internal temperature T2, the internal relative humidity P of the box is still judged. 2 Is it greater than the first humidity threshold V 3 , and then execute S3 or S4 according to the judgment result. This can reduce the missed detection rate of condensation water generation under the condition that T1 is less than T2, and further improve the monitoring accuracy of condensation water generation. Similarly, judging the external relative humidity P 1 Is it greater than the second humidity threshold V 4 All steps 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 condensed water. That is, the dehumidification method can only include step S5; or S5 and S6. Although Figure 4 It is shown that step S3 is executed as long as one of P1 or P2 meets the corresponding relative humidity threshold. According to other embodiments of the present application, step S3 can also be executed when both P1 and P2 meet their respective relative humidity thresholds. In other words, it is determined whether P1 is greater than or equal to V 3 , and judge whether P2 is greater than or equal to V 4 The two branches can be executed in parallel or serially.

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

[0105] Exemplarily, the temperature collection point of the first sensor 301 is set outside the box, and the temperature collection point of the second sensor 302 is set inside the box to obtain the external temperature and the internal temperature respectively. The first sensor 301 and the second sensor 302 include a thermal element, which can sense temperature changes and obtain the size of the temperature value.

[0106] For example, the dehumidifier 401 reads the external temperature T from the first sensor 301. 1 , and the internal temperature T from the second sensor 302 2 , T 1 and T 2 In contrast, when T 1 >T 2 The energy storage system is dehumidified by the dehumidifier 401. The process of reading the external temperature and the internal temperature and performing the comparison can be completed by the dehumidifier 401.

[0107] The dehumidifier 401 can be arranged inside the box of the energy storage system, or outside the box of the energy storage system, or both inside and outside the box, for example, part of the structure of the dehumidifier 401 is arranged inside the box, and part of the structure of the dehumidifier 401 is arranged outside the box.

[0108] In some embodiments of the present application, Figure 8 As shown, the dehumidification system 300 can be arranged in cooperation with the box 100 of the energy storage system. The box 100 of the energy storage system is provided with an installation slot or installation hole (not shown in the figure) for installing the dehumidification system, and the shape of the installation slot or installation hole matches the shape of the dehumidification system.

[0109] The dehumidifier 401 includes a turbine or an air pump with adsorption, evaporation, and condensation functions, and the input port and the output port of the dehumidifier 401 are respectively arranged inside and outside the box 100. When the dehumidifier 401 is started or the power is increased, for example, the air pump or the turbine is started or the working power of the air pump or the turbine is increased, so that the flow rate or flow velocity of the input port and the output port increases. When the dehumidifier 401 is dehumidifying, the turbine or the air pump drives the internal air of the box 100 to flow to the outside, or from the outside to the inside. In the process of the connection and flow of the internal air and the external air, the moisture carried by the internal air is adsorbed, evaporated, and condensed, so that the moisture amount carried by the internal air is reduced, and the purpose of dehumidifying the air inside the box is achieved.

[0110] According to some embodiments, the dehumidifier 401 is configured to receive an external temperature T 1 and internal temperature T 2 The dehumidifier 401 further includes a second processor 306 for determining the external temperature T 1 Is it greater than the internal temperature T2 When the external temperature T 1 Greater than the internal temperature T 2 When the temperature difference is greater than the temperature threshold, or when both temperatures are greater than the temperature threshold, the second processor 306 is further used to notify the turbine or air pump to perform dehumidification, stop dehumidification, or reduce the dehumidification power of the energy storage system according to the dehumidification method.

[0111] According to some 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. Fig. 9 As shown, the second processor 306 is used to obtain the external temperature from the first sensor 301 and the internal temperature from the second sensor 302, and determine the external temperature T 1 Is it greater than the internal temperature T 2 The second processor 306 is used to control the dehumidifier 401 to perform dehumidification, stop dehumidification, or reduce the dehumidification power of the energy storage system according to the judgment result. Correspondingly, the dehumidifier 401 further controls the turbine or air pump inside it.

[0112] When the internal relative humidity and / or the external relative humidity are further considered, the dehumidification system 300 further includes a third sensor 303 and / or a fourth sensor 304. The third sensor 303 is arranged inside the box body, and is used to obtain the internal relative humidity of the box body. The fourth sensor 304 is arranged outside the box body, and is used to obtain the external relative humidity of the box body. Accordingly, the second processor 306 is used to receive the internal relative humidity and / or the external relative humidity, and determine whether the internal or external relative humidity is greater than the corresponding first humidity threshold or 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 according to the judgment result. When the second processor 306 is part of the dehumidifier 401, the second processor 306 directly controls the turbine / air pump that is also part of the dehumidifier 401 to execute step S3 or S4 according to the judgment result.

[0113] In some embodiments, when the internal or external relative humidity is obtained by 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 the second processor 306. The first processor 305 and the second processor 306 may also be physically independent entities or integrated into one physical entity.

[0114] It should be noted that the temperature or humidity can be carried by an analog signal, which can be amplified, filtered, analog-to-digital converted, etc. in a corresponding sensor to obtain a corresponding temperature value or humidity value.

[0115] The first to fourth sensors 301-304 can be physically independent entities, and any two or more of them can be integrated into one physical entity. The integrated entity can be independent of the dehumidifier 401, or it can be a part of the dehumidifier 401. For example, the third sensor 303 and the second sensor 302 can be set as an integrated sensor, and the integrated sensor can have the function of obtaining the temperature and the relative humidity corresponding to the temperature. For another example, the fourth sensor 304 and the first sensor 301 can be set as an integrated sensor, and the integrated sensor can have the function of obtaining the temperature and the relative humidity corresponding to the temperature.

[0116] Fig.10 As shown, in some embodiments of the present application, an energy storage system is further provided. The energy storage system 1000 includes: a dehumidification system 300 and a box body 100 , and the dehumidification system 300 cooperates with the box body 100 .

[0117] The dehumidification system 300 has the functions of acquiring temperature and dehumidification, for example, a first sensor is set to acquire the external temperature of the box 100, and a second sensor is set to acquire the internal temperature of the box 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 greater than the internal temperature, the moisture carrying capacity of the air inside the box 100 is lower than that of the external air. When no condensation water is generated outside the box 100, condensation water may be generated inside the box 100. Therefore, using the internal temperature and the external temperature as control variables for the dehumidification operation of the dehumidifier can improve the confidence of condensation water monitoring, drive the dehumidification process, and reduce the probability of condensation water entering the box or the energy storage system.

[0120] In other embodiments, based on obtaining the internal temperature as the input for monitoring the generation of condensed water, the dehumidification system may also be provided with a relative humidity sensor. For example, a sensor for measuring the external relative humidity and / or the internal relative humidity may be provided. The internal relative humidity may also be used as the input for monitoring the generation of condensed water, thereby improving the accuracy of monitoring the generation of condensed water.

[0121] Corresponding to the energy storage system dehumidification method provided above, the present application embodiment also provides a computer device. Fig.11 The computer device 11 in the embodiment of the present application includes: a memory 1101, one or more processors 1102 ( Fig.11Only one is shown) and a computer program stored in the memory 1101 and executable on the processor. The memory 1101 is used to store software programs and units, and the processor 1102 executes various functional applications and data processing by running the software programs and units stored in the memory 1101 to obtain the resources corresponding to the above-mentioned preset events.

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

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

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

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

[0126] Those of ordinary skill in the art will appreciate that the algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0127] In the embodiments provided in the present application, it should be understood that the disclosed systems and methods can be implemented in other ways. If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the associated hardware through a computer program. The above-mentioned computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the above-mentioned computer program includes computer program code, and the above-mentioned computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The above-mentioned computer-readable storage medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer-readable memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the above-mentioned computer-readable storage medium can be appropriately increased or decreased 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 does 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 the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A dehumidification method for an energy storage system, characterized in that: include: Obtaining the external temperature of the box of the energy storage system; Obtaining the internal temperature of a box of the energy storage system; When the external temperature is greater than the internal temperature, the energy storage system is dehumidified.

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, dehumidifying the energy storage system includes: A 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: Acquire a temperature difference between the external temperature and the internal temperature, and a first temperature threshold and a second temperature threshold; When t<V2, the box body is subjected to external dehumidification or internal dehumidification is stopped; When V1>t≥V2, the box is dehumidified internally; When t≥V1, the power of dehumidifying the interior of the box is increased, or the interior and exterior of the box are dehumidified simultaneously; Wherein, t is the temperature difference, V1 is the first temperature threshold, and V2 is the second temperature threshold.

4. The dehumidification method for an energy storage system according to any one of claims 1 to 3, characterized in that: Also includes: Obtaining the internal relative humidity of the box; When the internal relative humidity of the box 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 3, characterized in that: Also includes: Obtaining the external relative humidity of the box; Obtaining absolute humidity according to the external relative humidity, and obtaining the internal relative humidity according to the absolute humidity; When the internal relative humidity of the box is greater than a first humidity threshold, the energy storage system is dehumidified.

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

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

8. A dehumidification system for an energy storage system, characterized in that: include: A first sensor, used to obtain the external temperature of the box of the energy storage system; A second sensor is used to obtain the internal temperature of the box of the energy storage system; A dehumidifier is used to dehumidify the energy storage system when the external temperature is greater than the internal temperature.

9. An energy storage system, characterized in that: include: A dehumidification system, wherein the dehumidification system comprises: A first sensor, used to obtain the external temperature of the box of the energy storage system; A second sensor is used to obtain the internal temperature of the box of the energy storage system; a dehumidifier, used to dehumidify the energy storage system when the external temperature is greater than the internal temperature; The energy storage system further comprises: The box is used to accommodate one or more battery cells.

10. A computer device, characterized in that: The method comprises a processor and a memory storing instructions, wherein when the instructions are executed by the processor, the processor executes the method according to any one of claims 1 to 7.

11. A computer-readable storage medium, characterized in that: The method comprises instructions which, when executed by a computer, cause the computer to perform the method according to any one of claims 1 to 7.

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