Cabinet door of energy storage device, energy storage cabinet, and electric device

Abstract

The present application provides a cabinet door of an energy storage device, an energy storage cabinet, and an electric device. The cabinet door comprises a flange and a cover. The flange is provided with a hollow space in the thickness direction of the flange; the cover is detachably connected to one side of the flange in the thickness direction; the cover comprises a fireproof portion; and the fireproof portion covers the hollow space so as to be configured as a flame barrier.

Description

A cabinet door for an energy storage device, an energy storage cabinet, and electrical equipment.

[0001] This application claims priority to Chinese Patent Application No. 202422625751.4, filed with the Chinese Patent Office on October 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of energy storage equipment technology, specifically to an energy storage equipment cabinet door, energy storage cabinet, and electrical equipment. Background Technology

[0003] Energy storage devices are the energy source for most electrical devices, and the safety of the energy storage modules in these devices directly affects the safety of the electrical devices themselves. Invention Overview

[0004] In related technologies, the cabinet doors of energy storage devices cannot effectively block flames when faced with open flame hazards, causing the energy storage modules to heat up quickly. The charging and discharging rates of the energy storage modules decrease at high temperatures, seriously affecting the realization of functions and even leading to the damage of the energy storage modules.

[0005] This application provides a cabinet door for an energy storage device, comprising: a flange having a through-hole in the thickness direction of the flange; and a cover detachably connected to one side of the flange in the thickness direction, the cover including a fireproof part covering the through-hole to be configured to block flames.

[0006] This application also provides an energy storage cabinet, comprising: a cabinet body including an installation space; an energy storage module disposed within the installation space; and a cabinet door as described above, wherein the flange of the cabinet door is welded to the cabinet body, and the cabinet door closes the installation space.

[0007] This application also provides an electrical device, including the aforementioned energy storage cabinet. Beneficial effects

[0008] The cabinet door of the energy storage device provided in this application has a fireproof part installed on the cover body. The fireproof part is installed at the flange access port, which can make the cabinet door have a good flame blocking effect. In the event of an open flame hazard, it can prevent the energy storage module from rapidly heating up, being damaged or malfunctioning.

[0009] The energy storage cabinet provided in this application can ensure the connection strength and sealing performance of the cabinet door, avoid setting the assembly surface on the cabinet body, and reduce the processing difficulty.

[0010] The electrical equipment provided in this application uses the aforementioned energy storage cabinet, which has a good flame-blocking effect. In the event of an open flame hazard, it can prevent the energy storage module from rapidly heating up, being damaged, or malfunctioning. Attached Figure Description

[0011] Figure 1 is a structural diagram of the energy storage cabinet provided in a possible implementation of this application.

[0012] Figure 2 is a structural diagram of the cabinet door of the energy storage cabinet provided in a possible implementation of this application.

[0013] Figure 3 is a cross-sectional view of the cabinet door of the energy storage cabinet provided in a possible implementation of this application.

[0014] Figure 4 is a structural diagram of the cabinet door cover provided by a possible implementation of this application.

[0015] Figure 5 is a structural diagram of the flange of the cabinet door provided in a possible implementation of this application.

[0016] Figure 6 is a schematic diagram of the connection between the cover and the flange provided in a possible implementation of this application.

[0017] Figure 7 is a structural schematic diagram of one side of a flange provided in a possible implementation of this application.

[0018] Figure 8 is a cross-sectional view in the flange thickness direction provided by a possible implementation of this application.

[0019] Figure 9 is a cross-sectional view of the connection provided in a possible implementation of this application.

[0020] Figure 10 is a schematic diagram showing the positions of the cabinet and energy storage module provided in a possible implementation of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100. Energy storage cabinet; 10. Cabinet door; 11. Flange; 110. Access port; 1110. Threaded hole; 12. Cover; 121. Fireproof part; 1211. Body; 1210. Receiving space; 12111. First wall; 12112. Second wall; 1212. Fireproof structure; 122. Connecting part; 1221. Connecting through hole; 1223. Third sealing groove; 1225. Fourth sealing groove; 13. Bolt; 14. First sealing ring; 15. Second sealing ring; 16. First sealing groove; 17. Second sealing groove; 20. Cabinet body; 21. Installation space; 30. Energy storage module; 200. Electrical equipment. Embodiments of the present invention

[0023] Energy storage devices are the energy source for most electrical appliances, and the safety of the energy storage modules directly affects the safety of the appliances. In some related technologies, the cabinet doors of energy storage devices fail to effectively block flames in the event of an open flame, causing the energy storage modules to overheat rapidly. This results in a decrease in the charging and discharging rate of the energy storage modules at high temperatures, severely impacting functionality and even leading to module damage.

[0024] Please refer to Figure 1, which is a structural diagram of the energy storage cabinet provided in an embodiment of this application. Based on the fact that cabinet doors in related technologies cannot block flames when facing open flame hazards, this embodiment of the application provides a cabinet door 10 for an energy storage device. For example, as shown in Figure 10, the energy storage device may further include an energy storage module 30 and a cabinet 20 configured to house the energy storage module, with the cabinet door 10 installed on the cabinet to enclose the receiving space of the cabinet 20.

[0025] Please refer to Figures 2 and 3. Figure 2 is a structural diagram of the cabinet door of the energy storage cabinet provided in this embodiment, and Figure 3 is a cross-sectional view of the cabinet door provided in this embodiment. The cabinet door 10 includes a flange 11 and a cover 12. The flange 11 is configured to connect the cabinet door 10 to the cabinet body 20. A loading / unloading port 110 is provided through the flange 11 in the thickness direction, through which the energy storage module can be placed into the receiving space of the cabinet body 20. The cover 12 is configured to cover the loading / unloading port 110 to close the receiving space of the cabinet body 20. The cover 12 is detachably connected to one side of the flange 11 in the thickness direction. The cover 12 includes a fireproof part 121, which can block flames. The fireproof part 121 covers the loading / unloading port 110 to prevent flames from approaching the energy storage module and causing damage to the energy storage module.

[0026] The cabinet door 10 provided in this application embodiment has a good flame-blocking effect by providing a fireproof part 121 on the cover 12. The fireproof part 121 covers the opening 110 of the flange 11, which can prevent the cabinet door 10 from causing the energy storage module to heat up rapidly, be damaged or fail to function when an open flame hazard occurs.

[0027] As shown in Figure 3, the fireproof part 121 of the cover 12 may include a main body 1211 and a fireproof structure 1212. The main body 1211 has an accommodating space, and the fireproof structure 1212 is located in the accommodating space.

[0028] In some embodiments, the body portion 1211 may be made of materials that are corrosion-resistant, pressure-resistant, temperature-resistant, and have good thermal insulation properties to ensure the safety and stability of the cover 12. For example, the materials that the body portion 1211 may be made of include, but are not limited to, carbon steel, stainless steel, and composite materials (such as glass fiber reinforced plastic) to ensure the safety and effectiveness of the energy storage device in the working environment. The body portion 1211 has a receiving space designed to extend perpendicular to the thickness direction, and the fireproof structure 1212 is filled within the receiving space.

[0029] The fire-resistant structure 1212 possesses excellent high-temperature resistance, flame retardancy, water resistance, chemical stability, mechanical strength, and low thermal conductivity to ensure that the cabinet door 10 to which it is applied has sufficient fire resistance and overall safety. For example, the fire-resistant structure 1212 may include, but is not limited to, at least one of a mineral material layer (e.g., rock wool, glass wool), a polymer-based material layer (e.g., flame-retardant polyurethane foam), and a ceramic material layer (e.g., ceramic fiber). Implementers can select the appropriate material based on specific application scenarios and fire protection requirements during the design process.

[0030] In implementing some embodiments of this application, the inventors discovered that, in the planar space perpendicular to the thickness direction of the flange 11, if the orthographic projection of the accommodating space of the cabinet door 10 is too small, the area of ​​the fireproof structure will be too small, and the cabinet door 10 will not be able to effectively block flames to protect the energy storage module. If the orthographic projection of the accommodating space of the cabinet door 10 is too large, the area of ​​the fireproof structure will be too large, and since the strength of the fireproof structure is usually low, the structural strength of the cabinet door 10 will be insufficient, and the cabinet door 10 will be easily broken and damaged by impact and vibration. After long-term experiments, the inventors creatively concluded that if the ratio of the area of ​​the orthographic projection of the accommodating space to the area of ​​the orthographic projection of the access port 110 is set to 1-1.05, the flame isolation performance of the cabinet door 10 can be greatly improved while ensuring the strength of the cabinet door 10.

[0031] For example, the ratio of the area of ​​the orthographic projection of the accommodating space to the area of ​​the orthographic projection of the loading / unloading port 110 can be any value among 1.01, 1.02, 1.03, and 1.04, or any other value within the range of 1 to 1.05. Implementers can flexibly choose the appropriate value within this range depending on the specific design.

[0032] In implementing the embodiments of this application, the inventors also discovered that if the ratio of the size of the body portion 1211 to the size of the accommodating space is too small along the thickness direction of the body portion 1211, the thickness of the fireproof structure will be too small. This is not conducive to ensuring that the cabinet door 10 has good rigidity and strength in the thickness direction, and the cabinet door 10 is easily deformed or even broken due to impact and vibration. If the ratio of the size of the body portion 1211 to the size of the accommodating space is too large, the thickness of the fireproof structure will be too large. Since the strength of the fireproof structure is usually low, it is not conducive to filling more fireproof structure 1212 inside the cabinet door 10, resulting in poor fireproof performance of the cabinet door 10. After many experiments and long-term practice, the inventors creatively concluded that if the ratio of the size of the body portion 1211 to the size of the accommodating space is set to 3 to 5, the flame isolation performance of the cabinet door 10 can be greatly improved while ensuring the structural rigidity and strength of the cabinet door 10.

[0033] For example, the ratio of the size of the main body 1211 to the size of the accommodating space can be set to any value among 3.25, 3.5, 3.75, 4, 4.25, 4.5, and 4.75. Of course, it can also be any other value within the range of 3 to 5. Implementers can flexibly choose the appropriate value within this range when making specific designs.

[0034] In some embodiments of this application, along the thickness direction of the body portion 1211, the body portion 1211 has a first wall 12111 and a second wall 12112 spaced apart, and a receiving space is formed between the first wall 12111 and the second wall 12112. In this embodiment, the dimension of the body portion 1211 along the thickness direction refers to the sum of the thicknesses of the first wall 12111 and the second wall 12112. Correspondingly, the dimension of the receiving space along the thickness direction of the body portion 1211 refers to the distance between the first wall 12111 and the second wall 12112.

[0035] In implementing some embodiments of this application, the inventors also discovered that if the volume of the fireproof structure 1212 is too small, it is not conducive to the cabinet door 10 effectively blocking flames. After numerous experiments and practices, the inventors concluded that if the ratio of the volume of the fireproof structure 1212 to the volume of the accommodating space is 0.9-1, the cabinet door 10 can have excellent fireproof performance.

[0036] For example, the ratio of the volume of the fireproof structure 1212 to the volume of the accommodating space can be any value among 0.92, 0.94, 0.96, and 0.98, or any other value within the range of 0.9-1. Implementers can flexibly choose the appropriate value within this range depending on the specific design.

[0037] Please refer to Figures 4 to 6. Figure 4 is a structural diagram of the cover provided in an embodiment of this application, Figure 5 is a structural diagram of the flange provided in an embodiment of this application, and Figure 6 is a schematic diagram of the connection between the cover and the flange provided in an embodiment of this application. The cover 12 may further include a connecting portion 122, which extends along the peripheral edge of the body portion 1211 and is detachably connected to the flange 11. In the cover 12 provided in this embodiment of this application, the body portion 1211 and the connecting portion 122 can be designed as an integral unit or as two separate components mechanically connected together. The thickness of the connecting portion 122 is less than the thickness of the body portion 1211, so that through holes can be opened along the thickness direction of the connecting portion 122 during machining, reducing drilling time and improving production efficiency. For example, the connecting part 122 has multiple connecting through holes 1221, the flange 11 has multiple threaded holes 1110 on the side facing the connecting part 122, and the cabinet door 10 also includes multiple bolts 13. The number of bolts 13 can be designed according to the connection strength and sealing level between the cabinet body 20 and the cabinet door 10. A bolt 13 passes through a connecting through hole 1221 and is screwed into a threaded hole 1110 so that the cover 12 can be connected to the cabinet body 20.

[0038] Please refer to Figures 7 and 8. Figure 7 is a structural schematic diagram of one side of the flange provided in an embodiment of this application, and Figure 8 is a cross-sectional view of the flange provided in an embodiment of this application in its thickness direction. In some embodiments of this application, the cabinet door 10 may further include a first sealing ring 14 and a second sealing ring 15. The first sealing ring 14 is disposed around the access port 110, and the second sealing ring 15 is located on the outer periphery of the first sealing ring 14. Both the first sealing ring 14 and the second sealing ring 15 are sandwiched between the cover 12 and the flange 11. Compared with the related art implementation using a single sealing ring, the embodiments of this application effectively improve the sealing performance by designing two sealing rings between the cover 12 and the flange 11, which can prevent liquid leakage from the joint gap between the cover 12 and the flange 11. It is understood that three or other reasonable number of sealing rings may also be provided between the cover 12 and the flange 11 to prevent liquid leakage from the joint gap. The implementer can design flexibly according to the actual situation.

[0039] Please refer to Figures 5 and 9. To achieve stable installation of the sealing ring, the flange 11 may have a first sealing groove 16 and a second sealing groove 17 surrounding the pick-up and put-out port 110 on the side facing the connection portion 122. The first sealing ring 14 is at least partially disposed in the first sealing groove 16, and the second sealing ring 15 is at least partially disposed in the second sealing groove 17. And / or, the connection portion 122 may have a third sealing groove 1223 and a fourth sealing groove 1225 surrounding the pick-up and put-out port 110 on the side facing the flange 11. The first sealing ring 14 is at least partially disposed in the third sealing groove 1223, and the second sealing ring 15 is disposed in the fourth sealing groove 1225. Figure 9 illustrates one possible implementation of the third sealing groove 1223 and the fourth sealing groove 1225.

[0040] For example, the flange 11 may have a first sealing groove 16 and a second sealing groove 17 surrounding the pick-up and put-out port 110 on the side facing the connection portion 122. The connection portion 122 does not have a third sealing groove and a fourth sealing groove on the side facing the flange 11. The first sealing ring 14 is at least partially disposed in the first sealing groove 16, and the second sealing ring 15 is at least partially disposed in the second sealing groove 17.

[0041] In some other embodiments, the flange 11 does not have a first sealing groove 16 and a second sealing groove 17 on the side facing the connection portion 122. The connection portion 122 has a third sealing groove 1223 and a fourth sealing groove 1225 surrounding the take-up and put-out port 110 on the side facing the flange 11. The first sealing ring 14 is at least partially disposed in the third sealing groove, and the second sealing ring 15 is disposed in the fourth sealing groove.

[0042] In some other embodiments, the flange 11 may have a first sealing groove 16 and a second sealing groove 17 surrounding the loading port 110 on the side facing the connection portion 122. The first sealing ring 14 is at least partially disposed in the first sealing groove 16, and the second sealing ring 15 is at least partially disposed in the second sealing groove 17. The connection portion 122 may also have a third sealing groove and a fourth sealing groove surrounding the loading port 110 on the side facing the flange 11. The first sealing ring 14 is at least partially disposed in the third sealing groove, and the second sealing ring 15 is disposed in the fourth sealing groove.

[0043] By installing the first sealing ring 14 and the second sealing ring 15 in the first sealing groove 16 and the second sealing groove 17 respectively, it is convenient to position the first sealing ring 14 and the second sealing ring 15 during the assembly process, and to prevent the first sealing ring 14 and the second sealing ring 15 from falling off or shifting during subsequent use, so that the cabinet door 10 has the advantages of easy assembly and stable and reliable installation.

[0044] Please refer to Figures 1 and 10. This application embodiment also provides an energy storage cabinet 100, which includes a cabinet body 20, an energy storage module 30, and a cabinet door 10. The cabinet body 20 may include an installation space 21, and the energy storage module 30 is disposed within the installation space 21. The cabinet door 10 is any of the cabinet doors in this application, and the flange 11 of the cabinet door 10 can be welded to the cabinet body 20 to close the installation space 21.

[0045] Specifically, the flange 11 includes a first side and a second side that are opposite to each other in its thickness direction. The first side can be connected to the cabinet 20 by welding, and the cover 12 is connected to the cabinet 20 through the flange 11. The second side is an assembly surface that mates with the cover 12. The flatness and surface roughness of the assembly surface can be set comprehensively based on the working conditions and sealing level of the cabinet door 10 to prevent liquid from seeping between the two mating surfaces of the cover 12 and the flange 11 after the cover 12 is connected to the flange 11. Compared with the related art where the cover is directly connected to the cabinet by other connection methods (such as hinge connection or bolt connection), the embodiment of this application can ensure the connection strength and sealing performance of the cabinet door 10 of the energy storage cabinet 100, avoid setting an assembly surface on the cabinet 20, and reduce the processing difficulty.

[0046] In some embodiments, there may be multiple installation spaces and multiple cabinets 20, with each cabinet door 10 enclosing an installation space.

[0047] For example, the energy storage module can be a regular shape similar to a cuboid, and the installation space can be a cuboid space. The cabinet door 10 can be designed as a rectangle, and multiple installation spaces can be arranged in a matrix. In other words, the width of multiple installation spaces in each row is the same, and the height of multiple installation spaces in each column is the same. Compared with installation spaces of other shapes (such as circles), unnecessary space waste in the energy storage cabinet 100 can be reduced, allowing more installation space to be designed within a limited volume, thereby deploying more energy storage modules, which is conducive to improving the energy storage density of the energy storage cabinet 100.

[0048] In some embodiments, the installation space 21 may also be filled with coolant, and the energy storage module is at least partially immersed in the coolant.

[0049] For example, the coolant can be mineral oil, synthetic oil, or other insulating fluids. During the filling of the installation space with coolant, the opening on the side of the installation space closest to the cabinet door 10 can be placed facing upwards, away from gravity, to facilitate coolant injection. Alternatively, the energy storage cabinet 100 in use can have an injection port connected to the installation space along the direction of gravity, through which coolant is injected into the installation space. Because the energy storage module is immersed in the coolant, the heat generated by the energy storage module can be dissipated more quickly, reducing the risk of overheating of the energy storage battery and improving the overall efficiency and safety of the system. When the energy storage cabinet 100 is subjected to external forces such as vibration or impact, the coolant can absorb the vibration and impact, thus helping to mitigate the effect of external forces on the energy storage module, providing a buffering protection effect.

[0050] This application also provides an electrical device 200, which may be, but is not limited to, a data center or an electric vehicle. The electrical device includes the energy storage cabinet 100 in any embodiment of this application.

[0051] In summary, the beneficial effects of the energy storage device cabinet door, energy storage cabinet, and electrical equipment provided in this application embodiment are as follows: On the one hand, by providing a fireproof part 121 on the cover, which covers the flange access port, the cabinet door can effectively block flames. In the event of an open flame hazard, the flame can prevent the energy storage module from experiencing significant temperature rise, damage, or functional failure. On the other hand, the flange is welded to the cabinet on the side away from the cover, and the other side of the flange facing the cover serves as an assembly surface that mates with the cover. The flatness and surface roughness of the assembly surface are set according to the working conditions and sealing level, ensuring the connection strength and sealing performance of the energy storage cabinet door, avoiding the need to set an assembly surface on the cabinet, and reducing the processing difficulty.

Claims

1. A cabinet door for an energy storage device, comprising: Flange (11), wherein a pick-and-place port (110) is provided through the flange (11) in the thickness direction. as well as, A cover (12) is detachably connected to one side of the flange (11) in the thickness direction. The cover (12) includes a fireproof part (121) which covers the access port (110) and is configured to block flames.

2. The cabinet door according to claim 1, wherein, The fireproof part (121) includes: The main body (1211) has a receiving space (1210) therein; and, A fireproof structure (1212) is provided within the accommodating space (1210).

3. The cabinet door according to claim 2, wherein, In a plane perpendicular to the thickness direction of the flange (11), the ratio of the area of ​​the orthographic projection of the receiving space (1210) to the area of ​​the orthographic projection of the loading port (110) is 1-1.

05.

4. The cabinet door according to claim 2, wherein, Along the thickness direction of the body portion (1211), the ratio of the size of the body portion (1211) to the size of the receiving space (1210) is 3 to 5; and / or, The ratio of the volume of the fireproof structure (1212) to the volume of the accommodating space (1210) is 0.9-1.

5. The cabinet door according to claim 2, wherein, The fireproof structure (1212) includes at least one of a mineral material layer, a polymer-based material layer, and a ceramic material layer.

6. The cabinet door according to any one of claims 2-5, wherein, The cover (12) also includes a connecting part (122), which extends along the peripheral edge of the body part (1211) and is detachably connected to the flange (11).

7. The cabinet door according to claim 6, wherein, The cabinet door (10) also includes a first sealing ring (14) and a second sealing ring (15). The first sealing ring (14) is arranged around the opening (110), and the second sealing ring (15) is located on the outer periphery of the first sealing ring (14). The first sealing ring (14) and the second sealing ring (15) are both sandwiched between the cover (12) and the flange (11).

8. The cabinet door according to claim 7, wherein, The flange (11) has a first sealing groove (16) and a second sealing groove (17) surrounding the loading port (110) on the side facing the connection part (122). The first sealing ring (14) is at least partially disposed in the first sealing groove (16), and the second sealing ring (15) is at least partially disposed in the second sealing groove (17); and / or The connecting part (122) has a third sealing groove (1223) and a fourth sealing groove (1225) arranged around the take-out port (110) on the side facing the flange (11). The first sealing ring (14) is at least partially disposed in the third sealing groove (1223), and the second sealing ring (15) is disposed in the fourth sealing groove (1225).

9. The cabinet door according to claim 6, wherein, The cabinet door (10) also includes multiple bolts (13), the flange (11) has multiple threaded holes (1110) on the side facing the connecting part (122), the connecting part (122) has multiple connecting through holes (1221), and one of the bolts (13) passes through one of the connecting through holes (1221) and is screwed into the threaded hole (1110).

10. An energy storage cabinet, comprising: Cabinet (20), including installation space (21); An energy storage module (30) is disposed within the installation space (21); as well as, The cabinet door (10) as described in any one of claims 1-9, wherein the flange (11) of the cabinet door is welded to the cabinet body (20), and the cabinet door (10) encloses the installation space (21).

11. The energy storage cabinet according to claim 10, wherein, There are multiple installation spaces (21) and cabinets (20), and each cabinet door (10) encloses one installation space (21).

12. The energy storage cabinet according to claim 10, wherein, The installation space (21) is filled with coolant, and the energy storage module (30) is at least partially submerged in the coolant.

13. An electrical appliance (200) comprising an energy storage cabinet (100) as described in any one of claims 10-12.

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