Moisture-absorbing structure and energy storage system

Abstract

The utility model discloses a moisture absorption structure and energy storage system relates to the technical field of electric power equipment, and the bottom shell is sealed assembly with the cabinet body, makes the placement cavity stretch into the inside of cabinet body, and the dry agent is used for placing in the placement cavity, realizes the moisture absorption dry of the inside of cabinet body through the breathable passage of the bottom surface and / or lateral wall of placement cavity, guarantees that the inside of cabinet body is in dry environment, and the upper cover is sealed assembly in the front panel through the installation mouth of cabinet body, makes the dry agent and outside environment form certain degree's isolation, and the dry agent is convenient to replace, and the dry agent mainly functions in the air moisture absorption of the inside of cabinet body, ensures the durability and performance of internal device.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and further to a moisture-absorbing structure and energy storage system. Background Technology

[0002] In the construction of electrochemical energy storage power stations, it is divided into large-scale storage and user-side energy storage, with large-scale storage being the main focus. User-side energy storage is further divided into residential energy storage (household energy storage) and industrial and commercial energy storage. Due to different application environments, the equipment inside the energy storage system includes PACK (battery pack), high-voltage control box, PCS (Power Conversion System), inverter, etc., and the protection level requirement reaches IP65, that is, the equipment is completely dustproof (IP6X level) and can withstand low-pressure water jets (IPX5 level).

[0003] The assembly environment of energy storage devices varies. They are generally assembled in batches in factories. However, due to different assembly areas or factors such as the season and rain, the internal humidity of these devices may be relatively high after assembly.

[0004] Of course, there are also special situations in the client application environment---such as the seaside, coastal areas, high-altitude areas, and foggy areas. These places have relatively high humidity, which may cause the equipment to have excessive humidity during use or subsequent maintenance.

[0005] Home energy storage inverters typically display grid-connected, off-grid, charging, and discharging status on their panels, while the battery pack displays the battery level. These displays usually use surface-mount panels or acrylic sheets. If the humidity is relatively high, condensation can occur on these display panels or acrylic sheets due to the high internal temperature and low external temperature of the casing. This can affect data reception on the user's end. Large water droplets can also potentially damage the device.

[0006] Due to varying client environments, such as high altitudes and high temperatures inside containers, the internal components of the product may pose safety hazards. Since the design did not consider the need for explosion-proof valves, the continuous operation of the equipment, coupled with increased internal air pressure, could affect the durability and performance of the internal components, creating significant safety risks. Utility Model Content

[0007] The core of this utility model is to provide a moisture-absorbing structure. A placement cavity in the bottom shell extends into the cabinet body, and the placement cavity has a ventilation channel to achieve moisture absorption. This ensures that the desiccant comes into contact with the air inside the cabinet to absorb moisture, thus ensuring the dryness of the cabinet interior. The specific solution is as follows:

[0008] A moisture-absorbing structure includes a bottom shell and a top cover, the bottom shell including a front panel and a placement cavity;

[0009] The front panel is used to seal the cabinet side wall, and the placement cavity extends into the cabinet; the bottom surface and / or side wall of the placement cavity are provided with ventilation channels, and the placement cavity is used to place desiccant;

[0010] The top cover is sealed and assembled to the front panel through the mounting port provided on the cabinet.

[0011] Optionally, the surface of the front panel is provided with a first sealing groove and a second sealing groove, wherein the first sealing groove is used to place a first sealing ring and the second sealing groove is used to place a second sealing ring.

[0012] Optionally, the front panel is sealed to the inner surface of the cabinet side wall by the first sealing ring;

[0013] The top cover is sealed to the front panel by the second sealing ring.

[0014] Optionally, the outer surface of the top cover is flush with the outer surface of the cabinet side wall.

[0015] Optionally, a first nut and a second nut are provided on the front panel;

[0016] The first nut is used to tighten the first screw; the second nut is used to tighten the second screw installed on the upper cover.

[0017] Optionally, both the first nut and the second nut are located between the first sealing groove and the second sealing groove.

[0018] Optionally, the ventilation channel is an elongated hole.

[0019] Optionally, a vent valve is provided on the top cover.

[0020] Optionally, the amount of the desiccant used is:

[0021] ;

[0022] in:

[0023] V: Internal volume of the container;

[0024] ρ: The density of water in air when it is saturated with humidity;

[0025] H1: Initial humidity;

[0026] H2: Target humidity;

[0027] k: Safety factor;

[0028] C; the moisture absorption capacity of the desiccant.

[0029] This utility model also provides an energy storage system, including a cabinet, on which a moisture-absorbing structure as described in any of the above claims is provided.

[0030] The moisture-absorbing structure of this utility model features a bottom shell that forms a sealed assembly with the cabinet body, allowing the placement cavity to extend into the cabinet interior. This cavity holds a desiccant, and through ventilation channels on the bottom and / or side walls of the placement cavity, moisture is absorbed and dried inside the cabinet, ensuring a dry environment. The top cover is sealed to the front panel via an installation port on the cabinet body, isolating the desiccant from the external environment and facilitating desiccant replacement. The desiccant primarily absorbs moisture from the air inside the cabinet, ensuring the durability and performance of the internal components. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is an exploded view of the moisture-absorbing structure of this utility model;

[0033] Figure 2 This is a front view of the moisture-absorbing structure of this utility model;

[0034] Figure 3 This is a side view of the moisture-absorbing structure of this utility model;

[0035] Figure 4 This is an exploded view showing the relative position of the moisture-absorbing structure of this utility model to the cabinet body;

[0036] Figure 5 This is an isometric view of the moisture-absorbing structure of this utility model installed in the cabinet.

[0037] Figure 6 This is a diagram illustrating how to replace the desiccant after removing the top cover.

[0038] The image includes:

[0039] Bottom shell 10; First sealing ring 101; Second sealing ring 102; First screw 103; Front panel 110; First sealing groove 111; Second sealing groove 112; First nut 113; Second nut 114; Placement cavity 120; Ventilation channel 121;

[0040] Top cover 20; second screw 201; vent valve 202;

[0041] Desiccant 30; Cabinet 40; Installation port 410. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solution of this utility model, the moisture-absorbing structure and energy storage system of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] The moisture-absorbing structure of this invention can be applied to the cabinets of electrical equipment, such as power storage systems. It uses desiccant to absorb the moisture contained in the air inside the cabinet, reducing the probability of water vapor condensation, ensuring the normal operation of electrical components, and allowing for easy replacement of the desiccant.

[0044] Combination Figure 1 , Figure 2 As shown, this utility model provides a moisture-absorbing structure including a bottom shell 10 and a top cover 20. The bottom shell 10 and the top cover 20 are two independent structures. The bottom shell 10 is used for fixed installation with the cabinet 40 of the power equipment, and the top cover 20 is installed on the bottom shell 10. The bottom shell 10 and the top cover 20 are made of insulating materials, such as PC, ABS, etc.

[0045] The bottom shell 10 includes a front panel 110 and a placement cavity 120. The front panel 110 and the placement cavity 120 are fixed as one piece. The front panel 110 has a plate-like structure. One surface of the front panel 110 is used to approach the side wall of the cabinet 40. The front panel 110 is sealed and assembled to the side wall of the cabinet 40. The front panel 110 is fixed and assembled to the cabinet 40 by bolts or other means. The front panel 110 and the side wall of the cabinet 40 maintain a sealed contact to prevent air and dust from entering the cabinet from the gap between the front panel 110 and the side wall of the cabinet 40.

[0046] Combination Figure 3 As shown, the placement cavity 120 is fixed to the front panel 110. The cross-sectional area (XZ plane) of the front panel 110 is larger than the cross-sectional area of ​​the placement cavity 120. The placement cavity 120 is fixed to the central area of ​​the front panel 110, and the edges of the front panel 110 are used for fixed assembly with the cabinet 40. The central area of ​​the front panel 110 is hollowed out, and the front end of the placement cavity 120 is fixedly connected to the front panel 110, and the front end of the placement cavity 120 communicates with the hollowed-out area in the center of the front panel 110. Desiccant 30 is taken out and placed into the placement cavity 120 through the hollowed-out area in the center of the front panel 110.

[0047] The rear end of the placement cavity 120 away from the front panel 110 is a solid end face. There are solid side walls around the front and rear ends of the placement cavity 120. The placement cavity 120 is enclosed by the rear bottom surface and the surrounding side walls to form a space for accommodating the desiccant 30.

[0048] After the current panel 110 is fixed to the cabinet 40, the placement cavity 120 extends into the cabinet 40, and ventilation channels 121 are provided on the bottom surface and / or the surrounding side walls of the placement cavity 120. The ventilation channels 121 can be provided on both the bottom surface and the surrounding side walls of the placement cavity 120 at the same time, or they can be provided only on the bottom surface or the surrounding side walls of the placement cavity 120.

[0049] When desiccant 30 is placed in the placement cavity 120, the air inside the cabinet 40 can enter the placement cavity 120 through the ventilation channel 121. Desiccant 30 absorbs the moisture in the air inside the cabinet 40, reducing the humidity of the air inside the cabinet 40 and reducing the probability of condensation inside the cabinet 40.

[0050] Desiccants 30 include silica gel, montmorillonite, fiber desiccants, and molecular sieves. Commonly used are blue or orange color-changing silica gel, which changes color after absorbing moisture to indicate replacement and can be regenerated and reused at high temperatures. Montmorillonite is environmentally friendly and non-corrosive, suitable for small, enclosed spaces such as sensors and LED lights. Fiber desiccants are thin and lightweight, suitable for confined spaces such as battery compartments in smart home devices. Molecular sieves offer highly efficient adsorption and are suitable for equipment extremely sensitive to humidity (such as optical instruments).

[0051] The desiccant 30 is placed in the space enclosed by the bottom and side walls of the placement cavity 120. The desiccant 30 can be placed arbitrarily without fixed positioning.

[0052] An installation port 410 is provided on the cabinet 40. After the front panel 110 is fixed to the cabinet 40, the front opening of the placement cavity 120 is directly opposite the installation port 410. The upper cover 20 is sealed and assembled to the front panel 110 through the installation port 410 provided on the cabinet 40. The contact gap between the upper cover 20 and the front panel 110 is kept sealed. When the upper cover 20 is installed on the front panel 110, the upper cover 20 blocks the installation port 410.

[0053] The top cover 20 can be removed from the front panel 110. When replacing the desiccant 30, open the top cover 20, remove the old desiccant and put in the new desiccant.

[0054] Under normal use, the top cover 20 is fixed to the front panel 110, which isolates the desiccant 30 from the external environment to a certain extent. The desiccant 30 mainly absorbs the moisture inside the cabinet 40. The top cover 20 is removable, which makes it easy to replace the desiccant 30 and ensures the durability and performance of the internal components.

[0055] Based on the above solution, this utility model provides a first sealing groove 111 and a second sealing groove 112 on the surface of the front panel 110. The first sealing groove 111 is used to place the first sealing ring 101, and the second sealing groove 112 is used to place the second sealing ring 102. Both the first sealing groove 111 and the second sealing groove 112 are complete annular grooves, ensuring a sealing effect around the placement cavity 120.

[0056] The first sealing ring 101 seals between the front panel 110 and the cabinet 40, and the second sealing ring 102 seals between the front panel 110 and the top cover 20. The first sealing groove 111 is larger than the second sealing groove 112, and the first sealing ring 101 surrounds the outer periphery of the second sealing ring 102.

[0057] The front panel 110 is sealed and assembled to the inner surface of the side wall of the cabinet 40 by a first sealing ring 101, and the top cover 20 is sealed and assembled to the front panel 110 by a second sealing ring 102. In this structure, the first sealing groove 111 and the second sealing groove 112 are both provided on the same surface of the front panel 110.

[0058] If the front panel 110 is fixed to the outer surface of the side wall of the cabinet 40, the first sealing groove 111 and the second sealing groove 112 are respectively set on two different surfaces of the front panel 110.

[0059] The front opening of the placement cavity 120 is smaller than the mounting port 410, so that a part of the front panel 110 is in the mounting port 410, the top cover 20 is embedded in the mounting port 410 and presses against the second sealing ring 102 installed on the front panel 110.

[0060] When the top cover 20 is installed on the front panel 110, the outer surface of the top cover 20 is flush with the outer surface of the side wall of the cabinet 40, ensuring that the outer surface of the entire cabinet 40 is flat.

[0061] Combination Figure 1 As shown, a first nut 113 and a second nut 114 are provided on the front panel 110. The first nut 113 and the second nut 114 are copper-embedded nuts, and can be of the same or different specifications. In the structure shown in the accompanying drawings of this application, there are four first nuts 113 and four second nuts 114.

[0062] Combination Figure 4 No, the first nut 113 is used to screw on the first screw 103. Several bolt holes are provided on the cabinet 40, and the bolt holes correspond one-to-one with the first nut 113. Several first screws 103 pass through the bolt holes and form a threaded connection with the first nut 113, thereby fixing the front panel 110 to the cabinet 40. The connecting force of the first nut 113 causes the front panel 110 to press the first sealing ring 101 to achieve a seal.

[0063] The second nut 114 is used to screw on the second screw 201 installed on the upper cover 20. The second screw 201 is a captive screw and can be tightened or loosened by hand. Figure 6 As shown, all the second nuts 114 are located within the range of the mounting port 410. After the upper cover 20 is inserted into the mounting port 410, each second nut 114 is tightened to make the upper cover 20 compress the second sealing ring 102 to achieve a seal.

[0064] Combination Figure 1 As shown, the first sealing groove 111 and the second sealing groove 112 are both complete annular structures. The first sealing groove 111 surrounds the second sealing groove 112. The first nut 113 and the second nut 114 are both located between the first sealing groove 111 and the second sealing groove 112, making full use of the space on the front panel 110.

[0065] Specifically, the ventilation channel 121 is an elongated hole that can extend along the axial direction (Y-axis) of the placement cavity 120, which is conducive to air circulation inside the cabinet 40.

[0066] Combination Figure 1 , Figure 5 As shown, a vent valve 202 is installed on the top cover 20. The vent valve 202 allows air to flow in both directions, ensuring the airflow inside and outside the cabinet 40 and preventing excessive pressure difference between the inside and outside from damaging the equipment.

[0067] The cabinet 40 is assembled in the factory. If it is used in high altitude and high air pressure conditions, the air pressure difference between the inside of the cabinet and the outside environment will increase. The air pressure inside and outside will be balanced by the vent valve 202.

[0068] The dosage of desiccant 30 is as follows:

[0069] ;

[0070] in:

[0071] V: Internal volume of the container, length × width × height, unit: cubic meters or liters;

[0072] ρ: The density of water in air when it is saturated with humidity, in g / m³, approximately 17.3 g / m³ at 25℃;

[0073] H1: Initial humidity, the humidity of the air inside the container during packaging, unit: %RH;

[0074] H2: Target humidity, the maximum permissible humidity for safe storage of the product, in %RH;

[0075] k: Safety factor, usually 1.2-2, to compensate for calculation errors and actual conditions;

[0076] C; The moisture absorption capacity of the desiccant, which is the amount of moisture that a unit weight of desiccant can absorb, in g / g. For example, silica gel is usually 0.2-0.3 g / g.

[0077] This utility model also provides an energy storage system, including a cabinet 40, with several components installed inside the cabinet 40, and the aforementioned moisture-absorbing structure installed on the cabinet 40, which can achieve the aforementioned technical effects.

[0078] By using desiccant 30 to absorb moisture and reduce air humidity, the following objectives can be achieved:

[0079] 1. Anti-condensation: When the product is used in an environment with large temperature differences, the internal air may condense when it gets cold. Desiccants (such as silica gel or montmorillonite) can absorb moisture and prevent condensation from damaging the circuit.

[0080] 2. Extend product lifespan: Inhibit problems such as metal oxidation and decreased insulation performance caused by moisture, thus extending the lifespan of electronic components.

[0081] 3. Auxiliary moisture protection: Even though IP65 can prevent water spray, moisture may still seep in through vents or aging seals in high-humidity environments (such as coastal areas). Desiccant provides secondary protection.

[0082] Combination Figure 4 , Figure 5 , Figure 6 As shown, two of the above-mentioned moisture-absorbing structures can be installed on a cabinet 40. Dispersed installation helps to improve the uniformity of moisture absorption.

[0083] The following example illustrates this point:

[0084] Taking the above energy storage system as an example, the standard single-cluster high-voltage control box has the following dimensions: width 760mm, depth 580mm, height 160mm, volume 0.0705m³, initial humidity 70%RH (relatively humid environment), target humidity 30%RH (the humidity standard required for electronic products is 30%-50%), silica gel desiccant (C=0.25g / g), and a safety factor of 1.5.

[0085] step:

[0086] 1. Calculate the amount of water loss (g) in the container:

[0087] 0.0705m³×17.3g / m³×(70%−30%)=0.4878g

[0088] 2. Calculate the required weight of desiccant (g):

[0089] 0.4878g × 1.5 ÷ 0.25g / g ≈ 2.93g

[0090] 3. Results: At least 2.93 grams of silica gel desiccant is required (4 small packets can be used in practice, the common specification is 1g / packet), and it is generally maintained and replaced about every six months.

[0091] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A moisture-absorbing structure, characterized in that, It includes a bottom shell (10) and a top cover (20), the bottom shell (10) including a front panel (110) and a placement cavity (120). The front panel (110) is used to seal the side wall of the cabinet (40), and the placement cavity (120) extends into the cabinet (40); the bottom surface and / or side wall of the placement cavity (120) are provided with ventilation channels (121), and the placement cavity (120) is used to place desiccant (30). The top cover (20) is sealed and assembled to the front panel (110) through the mounting port (410) provided on the cabinet (40).

2. The moisture-absorbing structure according to claim 1, characterized in that, The surface of the front panel (110) is provided with a first sealing groove (111) and a second sealing groove (112), the first sealing groove (111) is used to place a first sealing ring (101), and the second sealing groove (112) is used to place a second sealing ring (102).

3. The moisture-absorbing structure according to claim 2, characterized in that, The front panel (110) is sealed to the inner surface of the side wall of the cabinet (40) by the first sealing ring (101); The top cover (20) is sealed to the front panel (110) by the second sealing ring (102).

4. The moisture-absorbing structure according to claim 3, characterized in that, The outer surface of the top cover (20) is flush with the outer surface of the side wall of the cabinet (40).

5. The moisture-absorbing structure according to claim 3, characterized in that, A first nut (113) and a second nut (114) are provided on the front panel (110); The first nut (113) is used to screw on the first screw (103); the second nut (114) is used to screw on the second screw (201) installed on the upper cover (20).

6. The moisture-absorbing structure according to claim 5, characterized in that, The first nut (113) and the second nut (114) are both located between the first sealing groove (111) and the second sealing groove (112).

7. The moisture-absorbing structure according to claim 1, characterized in that, The ventilation channel (121) is an elongated hole.

8. The moisture-absorbing structure according to any one of claims 1 to 7, characterized in that, A vent valve (202) is provided on the upper cover (20).

9. The moisture-absorbing structure according to claim 8, characterized in that, The amount of the desiccant (30) used is: ； in: V: Internal volume of the container; ρ: The water density of air when it is saturated with humidity; H1: Initial humidity; H2: Target humidity; k: Safety factor; C: The moisture absorption capacity of the desiccant.

10. An energy storage system, characterized in that, Includes a cabinet (40), on which a moisture-absorbing structure as described in any one of claims 1 to 9 is provided.

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