A noise reduction structure for an energy storage device

Abstract

The present application relates to the technical field of cabinet noise reduction, and aims to solve the problems of short energy storage equipment air duct, poor noise attenuation, complex structure of existing noise reduction mode, occupation of space, change of appearance, influence on heat dissipation safety, inability to achieve efficient noise reduction by extending the air duct and left-right segmentation of air outlet, provide a noise reduction structure of energy storage device, including energy storage all-in-one machine and noise reduction structure; The noise reduction structure is arranged on the air outlet side of the energy storage all-in-one machine, a first air outlet air duct and a second air outlet air duct are formed in the noise reduction structure and communicated with the first air outlet and the second air outlet, and the first air outlet air duct and the second air outlet air duct are independently separated to extend the air duct travel. The present application has the beneficial effects of setting the mutually independent air outlet air duct to extend the air duct travel, adopting left-right dispersion air outlet to avoid noise superposition, achieving efficient noise reduction without occupying additional space, changing the appearance of the device, and not affecting ventilation and heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of cabinet noise reduction technology, and more specifically, to a noise reduction structure for an energy storage device. Background Technology

[0002] Commercial and industrial energy storage units are widely used in residential areas and industrial parks. The fan and airflow noise generated during equipment operation has become a major problem affecting the surrounding environment. Existing commercial and industrial energy storage equipment generally adopts an upward centralized ventilation structure with short air ducts and a single air outlet direction, making it difficult to attenuate noise. The noise level is high when operating at full load, which can easily disturb residents' lives. To achieve noise reduction, existing solutions mostly rely on external silencers or passive retrofitting, which not only makes the structure complex, occupies external space, and changes the size of the equipment, but also affects the heat dissipation efficiency and operational safety of the equipment. Summary of the Invention

[0003] The present invention aims to provide a noise reduction structure for an energy storage device to solve the problems of short air ducts and poor noise attenuation in existing energy storage devices, as well as the complex structure, space occupation, changes in shape, and impact on heat dissipation safety of existing noise reduction methods, which cannot achieve efficient noise reduction by extending the air duct and dividing the air outlet to the left and right.

[0004] This invention is implemented as follows: This invention provides a noise reduction structure for an energy storage device, which includes an integrated energy storage unit and a noise reduction structure; The aforementioned noise reduction structure is located on the air outlet side of the cabinet of the aforementioned integrated energy storage unit, and the aforementioned integrated energy storage unit is provided with an independent first air outlet and a second air outlet. The noise reduction structure forms a first air outlet duct connected to the first air outlet and a second air outlet duct connected to the second air outlet. The first air outlet duct and the second air outlet duct are independently separated to extend the air outlet duct travel. The air outlet direction of the first air outlet duct and the air outlet direction of the second air outlet duct are respectively directed to disperse air to the left and right sides.

[0005] Furthermore, the aforementioned noise reduction structure is provided with a first side louver (not shown in the figure), a first back louver, a second side louver, and a second back louver on the side and back of the outer shell, respectively.

[0006] This configuration, by setting first and second side louvers in the first and second air outlet zones respectively, avoids noise superposition caused by the convergence of airflows, ensuring the heat dissipation effect of the PCS and liquid cooling unit, and taking into account both noise reduction and the heat dissipation requirements of equipment operation.

[0007] Furthermore, the aforementioned noise reduction structure is arranged sequentially with the electrical compartment and battery compartment of the aforementioned energy storage integrated machine, and the aforementioned noise reduction structure is assembled at the air outlet of the aforementioned electrical compartment through a sealing strip.

[0008] With this configuration, the aforementioned noise reduction structure is arranged sequentially with the electrical compartment and battery compartment of the integrated energy storage unit, adapting to the original spatial layout of the equipment to achieve integrated installation without occupying additional space and with a neat appearance. At the same time, the aforementioned sealing strip is installed at the air outlet of the electrical compartment, which not only ensures the airtightness of the assembly between the noise reduction structure and the equipment, avoiding the reduction effect due to air leakage, but also allows the air outlet of the electrical compartment to accurately enter the aforementioned noise reduction structure to complete the noise reduction treatment, taking into account both installation compatibility and noise reduction effectiveness.

[0009] Furthermore, the aforementioned outer casing includes an inner steel plate, which divides the internal space of the aforementioned outer casing into the aforementioned first air outlet duct and the aforementioned second air outlet duct, which are independent of each other.

[0010] This configuration uses the internal steel plate to separate the first and second air outlet ducts, eliminating the need for additional partition components. This simplifies the overall structure of the noise reduction design, reduces manufacturing and assembly costs, and ensures a stable partition effect. This guarantees that the two ducts are independent of each other, effectively preventing noise from different ducts from overlapping and ensuring the noise reduction effect.

[0011] Furthermore, the inner perimeter of the first and second air outlet ducts are respectively covered with sound-absorbing cotton for the first duct and the second duct.

[0012] With this setup, special sound-absorbing cotton is attached to the inner walls of the two independent air outlet ducts. This can specifically absorb the airflow noise in the ducts, further reducing the noise radiated outward by the equipment, while not affecting the ventilation efficiency of the ducts and improving the overall noise reduction effect.

[0013] Furthermore, the first air duct sound-absorbing cotton and the second air duct sound-absorbing cotton are respectively attached to the inner walls of the first air outlet duct and the second air outlet duct, and adjacent first air duct sound-absorbing cotton and adjacent second air duct sound-absorbing cotton are tightly attached.

[0014] This setup and arrangement enables precise sound absorption and noise reduction in different zones, avoiding mutual interference between noises from different air ducts. The close fit of adjacent sound-absorbing cotton creates a seamless sound-absorbing layer on the inner wall of the air duct, eliminating blind spots in sound absorption and significantly improving the sound-absorbing cotton's ability to absorb noise within the air duct, further reducing equipment operating noise.

[0015] Furthermore, the noise reduction structure has a shell, and the inner ends of the shell are respectively provided with a first air outlet area and a second air outlet area, and the first air outlet duct and the second air outlet duct are respectively connected to the first air outlet area and the second air outlet area.

[0016] With this configuration, by dividing the aforementioned first air outlet area and the aforementioned second air outlet area into independent sections inside the outer casing and connecting the corresponding air ducts, the two air outlets can be completely separated, avoiding mutual interference of airflow and noise superposition, further improving the noise reduction effect, while ensuring smooth and stable airflow.

[0017] Furthermore, the connection between the aforementioned noise reduction structure and the aforementioned integrated energy storage unit is one or a combination of welding, snap-fit, and the aforementioned noise reduction structure and the cabinet of the aforementioned integrated energy storage unit are either separately connected or integrally formed.

[0018] With this configuration, the noise reduction structure and the energy storage unit can be connected by welding, snap-fitting, or a combination of both. It supports both separate connection and one-piece molding, which can adapt to different production, processing, installation and usage needs, and the connection methods are flexible and diverse. Welding and snap-fitting can ensure the stability of the connection and the sealing of the assembly. Separate connection facilitates the individual disassembly, maintenance and replacement of the noise reduction structure. One-piece molding can reduce the overall manufacturing cost and the weight of the equipment, taking into account the stability of the equipment assembly, the flexibility of use and the economy of production.

[0019] Furthermore, the cabinet depth dimensions of the aforementioned noise reduction structure and the aforementioned integrated energy storage unit are 316mm~710mm and 1000mm~1400mm, respectively.

[0020] This configuration, by limiting the depth of the noise reduction structure and the energy storage unit cabinet to a ratio of 316mm~710mm:1000mm~1400mm, ensures sufficient airflow for effective noise reduction while making the overall structure compact and adaptable, without occupying additional installation space, and without affecting the normal ventilation and heat dissipation of the equipment and the rationality of the overall layout.

[0021] Furthermore, the aforementioned noise reduction structure has a first direction along the length of the noise reduction structure and a second direction along the front to back of the integrated energy storage unit. The length of the back baffle directly opposite the first air outlet or the second air outlet in the first direction is L1, the length of the louver in the first direction is L2, and the length of the louver in the second direction is L3. The condition L1 > L3 and L1 + L2 > L3 is satisfied, so that the distance of the air duct from the side to the first air outlet or the second air outlet is greater than the distance from the back to the first air outlet or the second air outlet, thus extending the air outlet duct travel.

[0022] This configuration, by limiting the size relationship between L1 > L3 and L1 + L2 > L3, makes the distance of the air duct from the side to the air outlet greater than the distance from the back to the air outlet, effectively extending the air outlet duct travel and increasing the propagation and attenuation path of noise in the air duct. It significantly improves the noise reduction effect without occupying extra space or changing the shape of the equipment, while ensuring smooth airflow.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: This invention changes the traditional upward concentrated airflow method by setting independent air outlet ducts on the left and right sides and extending the duct travel with appropriate size design. This avoids the superposition of airflow and noise. Combined with the sound-absorbing cotton inside the duct to absorb noise, the noise reduction effect is greatly improved. At the same time, the noise reduction structure is integrated into the rear of the equipment, without taking up extra space or changing the external size of the equipment. It does not require later modification and does not affect heat dissipation or equipment operation performance. It also solves the problems of high noise reduction cost, complex structure and disturbance to residents in existing energy storage equipment. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional perspective view of a noise reduction structure of an energy storage device according to an embodiment of the present invention; Figure 2 This is an assembly diagram of the integrated energy storage unit and the noise reduction structure in an embodiment of the present invention; Figure 3 This is a first-view structural diagram of the noise reduction structure in an embodiment of the present invention; Figure 4 This is a second-view structural diagram of the noise reduction structure in an embodiment of the present invention; Figure 5 This is a third-view structural diagram of the noise reduction structure in an embodiment of the present invention; Figure 6 This is a schematic diagram of the air outlet direction of a noise reduction structure of an energy storage device in an embodiment of the present invention.

[0026] Icons: 1-Energy storage unit, 2-Noise reduction structure, 3-First air outlet, 4-Second air outlet, 5-First air outlet duct, 6-Second air outlet duct, 7-Sound-absorbing cotton for the first air outlet, 8-Sound-absorbing cotton for the second air outlet, 9-Outer shell, 10-First air outlet area, 11-Second air outlet area, 12-First rear louver, 13-Second side louver, 14-Second rear louver, 15-Electrical compartment, 16-Battery compartment, 17-Sealing strip, 18-Internal steel plate, 19-Side, 20-Rear. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] Example See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 This embodiment proposes a noise reduction structure for an energy storage device, including an integrated energy storage unit 1 and a noise reduction structure 2; The noise reduction structure 2 is located on the air outlet side of the cabinet of the energy storage unit 1. The energy storage unit 1 is provided with a first air outlet 3 and a second air outlet 4 that are independent of each other. The noise reduction structure 2 forms a first air outlet duct 5 connected to the first air outlet 3 and a second air outlet duct 6 connected to the second air outlet 4. The first air outlet duct 5 and the second air outlet duct 6 are independently separated to extend the air outlet duct travel. The air outlet direction of the first air outlet duct 5 and the air outlet direction of the second air outlet duct 6 are respectively directed to disperse the air to the left and right sides.

[0030] During operation, the air generated by the energy storage unit 1 is discharged from the first air outlet 3 and the second air outlet 4, respectively, and enters the first air outlet duct 5 and the second air outlet duct 6, which are independently separated, extending the air outlet duct travel. Then, the air from the first air outlet duct 5 and the second air outlet duct 6 are dispersed to the left and right sides respectively to complete the noise reduction air outlet.

[0031] The noise reduction structure of the energy storage device disclosed in this embodiment adopts a first air outlet duct 5 and a second air outlet duct 6 that are independently separated. Compared with exhausting air directly from the air outlet side, this effectively extends the travel of the air outlet duct. Moreover, the two air outlets disperse the air to the left and right sides respectively, avoiding the superposition of airflow and noise. This achieves efficient noise reduction without occupying extra space or changing the shape of the equipment.

[0032] In this embodiment, the first air outlet 3 and the second air outlet 4 can be used for PCS air outlet, liquid cooling unit air outlet, or air outlet of other modules, such as battery compartment air outlet, air conditioner air outlet, etc.

[0033] The noise reduction structure 2 is arranged sequentially with the electrical compartment 15 and battery compartment 16 of the integrated energy storage unit 1. The noise reduction structure 2 is installed at the air outlet of the electrical compartment 15 via a sealing strip 17. This sequential arrangement of the noise reduction structure 2 with the electrical compartment 15 and battery compartment 16 of the integrated energy storage unit 1 allows for integrated installation that adapts to the original spatial layout of the equipment, without occupying additional space and with a neat appearance. At the same time, the installation of the noise reduction structure 2 at the air outlet of the electrical compartment 15 via the sealing strip 17 ensures the airtightness of the assembly between the noise reduction structure 2 and the equipment, preventing the noise reduction effect from being reduced due to air leakage. It also allows the air outlet of the electrical compartment 15 to accurately enter the noise reduction structure 2 to complete the noise reduction treatment, thus taking into account both installation compatibility and noise reduction effectiveness.

[0034] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The outer shell 9 includes an inner steel plate 18, which divides the internal space of the outer shell 9 into a first air outlet duct 5 and a second air outlet duct 6 that are independent of each other. In the first air outlet duct 5, the inner steel plate 18 is provided with a slope structure on the side of the second rear louver 14, or the steel plate is inclined. The slope structure can guide the air out of the first air outlet 3 and also forms a partition that blocks the first air outlet duct 5 and the second air outlet area 11. In the second air outlet duct 6, the inner steel plate 18 is provided with a slope structure on the side of the first rear louver 12, or the steel plate is inclined. The slope structure can guide the air out of the second air outlet 4 and also forms a partition that blocks the second air outlet duct 6 and the second air outlet area 10.

[0035] In some embodiments, the slope structure may or may not coincide with the shadow of the second rear louver 14 in the front-rear direction, preferably depending on the length of the first air outlet 3. For example, as... Figure 4As shown, the projection of the slope structure in the front-to-back direction coincides with the second rear louver 14. At this time, the first air outlet 3 extends from the first air outlet area 10 to the second air outlet area 11. Thus, the air from the first air outlet 3 can be discharged from the first air outlet area 10, increasing the length of the air duct. The slope structure can guide the air out and also avoid direct air discharge from the second rear louver 14, reducing the noise of the air discharge and improving heat dissipation. The second air outlet 4 is similar to the above.

[0036] The internal steel plate 18 separates the first air outlet duct 5 and the second air outlet duct 6 without the need for additional partition components. This simplifies the overall structure of the noise reduction structure 2, reduces manufacturing and assembly costs, and ensures a stable partition effect. This ensures that the two ducts are independent of each other, effectively avoids the superposition of noise from different ducts, and guarantees the noise reduction effect.

[0037] The inner perimeter of the first air outlet duct 5 and the second air outlet duct 6 are respectively covered with first air outlet sound-absorbing cotton 7 and second air outlet sound-absorbing cotton 8. Special sound-absorbing cotton is attached to the inner perimeter of the two independent air outlet ducts to specifically absorb the airflow noise in the ducts, further reduce the noise radiated outward by the equipment, and at the same time, it does not affect the ventilation efficiency of the ducts and improves the overall noise reduction effect.

[0038] The first air duct sound-absorbing cotton 7 and the second air duct sound-absorbing cotton 8 are respectively attached to the inner walls of the first air outlet duct 5 and the second air outlet duct 6. The adjacent first air duct sound-absorbing cotton 7 and the adjacent second air duct sound-absorbing cotton 8 are tightly attached. This arrangement achieves precise sound absorption and noise reduction in different zones and avoids mutual interference of noise from different air ducts. The tight attachment of adjacent sound-absorbing cotton forms a gapless sound-absorbing layer on the inner wall of the air duct, eliminating sound absorption blind spots and greatly improving the absorption effect of the sound-absorbing cotton on the noise in the air duct, further reducing the operating noise of the equipment.

[0039] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The noise reduction structure 2 has an outer shell 9. The inner ends of the outer shell 9 are respectively provided with a first air outlet area 10 and a second air outlet area 11. The first air outlet duct 5 and the second air outlet duct 6 are respectively connected to the first air outlet area 10 and the second air outlet area 11. By setting up independent first air outlet area 10 and second air outlet area 11 inside the outer shell 9 and connecting the corresponding air ducts, the two air outlets can be completely separated, avoiding mutual interference of airflow and noise superposition, further improving the noise reduction effect, and ensuring smooth and stable airflow.

[0040] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The first air outlet zone 10 is provided with a first side louver (not shown in the figure), and the second air outlet zone 11 is provided with a second side louver 13. By providing the first side louver (not shown in the figure) and the second side louver 13 in the first air outlet zone 10 and the second air outlet zone 11 respectively, the noise superposition caused by the convergence of air outlet airflow is avoided, ensuring the heat dissipation effect of the PCS and liquid cooling unit, and taking into account both noise reduction and the heat dissipation requirements of equipment operation.

[0041] In some other embodiments, the back of the housing 9 is also provided with a first back louver 12 and a second back louver 14. By providing the first back louver 12 and the second back louver 14 on the back of the housing 9, the air outlet range of the air outlet area is expanded. This can reduce noise while increasing the air volume of the energy storage cabinet and improving heat dissipation efficiency.

[0042] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The noise reduction structure 2 and the energy storage unit 1 are connected by welding, snap-fitting, or a combination thereof. The cabinet of the noise reduction structure 2 and the energy storage unit 1 can be either a separate connection or a one-piece molding. The noise reduction structure 2 and the energy storage unit 1 can be connected by welding or snap-fitting, either individually or in combination. Both separate connection and one-piece molding are supported, which can adapt to different production, processing, installation and use requirements. The connection method is flexible and diverse. Welding and snap-fitting can ensure the stability of the connection and the sealing of the assembly. Separate connection facilitates the individual disassembly, maintenance and replacement of the noise reduction structure 2. One-piece molding can reduce the overall manufacturing cost and the weight of the equipment, taking into account the stability of the equipment assembly, the flexibility of use and the economy of production.

[0043] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 Furthermore, the cabinet depth dimensions of the noise reduction structure 2 and the integrated energy storage unit 1 are 316mm~710mm:1000mm~1400mm. By limiting the cabinet depth dimensions of the noise reduction structure 2 and the integrated energy storage unit 1 to the ratio range of 316mm~710mm:1000mm~1400mm, sufficient air duct travel is ensured to achieve effective noise reduction, while making the overall structure compact and adaptable, without occupying additional installation space, and without affecting the normal ventilation and heat dissipation of the equipment and the rationality of the overall layout.

[0044] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5and Figure 6 The noise reduction structure 2 has a first direction along the length of the noise reduction structure 2 and a second direction along the front to back of the energy storage unit 1. The length of the back panel 20 directly opposite the first air outlet 3 or the second air outlet 4 is L1 in the first direction, the length of the louver in the first direction is L2, and the length of the louver in the second direction is L3. The condition L1 > L3 and L1 + L2 > L3 is satisfied, so that the distance of the air duct from the side to the first air outlet 3 or the second air outlet 4 is greater than the distance from the back 20 to the first air outlet 3 or the second air outlet 4. This extends the air duct travel. By limiting the size relationship of L1 > L3 and L1 + L2 > L3, the distance of the air duct from the side to the air outlet is greater than the distance from the back to the air outlet. This effectively extends the air duct travel, increases the propagation and attenuation path of noise in the air duct, and significantly improves the noise reduction effect without occupying extra space or changing the shape of the equipment, while ensuring smooth airflow.

[0045] See Figure 1 The depth of the noise reduction structure 2 is 316mm to 710mm, and the cabinet depth of the energy storage unit 1 is 1000mm to 1400mm. When the depth of the noise reduction structure 2 is 316mm and the cabinet depth of the energy storage unit 1 is 1400mm, the thickness of the noise reduction structure 2 is at its lowest, which can achieve the maximum utilization of space. The air can be discharged from the first side louvers and the second side louvers 13 corresponding to the first air outlet area 10 and the second air outlet area 11 on both sides, increasing the length of the air duct. When the depth of the noise reduction structure 2 is 710mm and the cabinet depth of the energy storage unit 1 is 1000mm, the equipment in front of the cabinet of the energy storage unit 1 has a high degree of integration and requires a high heat dissipation capacity. Therefore, the air duct width of the noise reduction structure 2 is increased to increase the air volume while reducing noise and achieve better heat dissipation.

[0046] Meanwhile, the ratio of 316mm~710mm:1000mm~1400mm ensures that the noise reduction structure does not protrude from the integrated cabinet. The depth of the noise reduction structure 2 precisely matches the empty space at the rear of the energy storage unit 1 cabinet, allowing it to be directly embedded into the rear of the cabinet to achieve an integrated layout. This eliminates the need to occupy external space for the equipment and does not change the original external dimensions of the equipment. While ensuring the neatness of the equipment's appearance, it maximizes the use of the internal space of the cabinet, ensuring that the setting of the noise reduction structure 2 does not affect the layout and operation of other components of the energy storage unit 1.

[0047] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6In this embodiment, the first air outlet duct 5 and the second air outlet duct 6 are not connected to each other. The first air outlet duct 5 and the second air outlet duct 6 are respectively connected to their respective first air outlet area 10 and second air outlet area 11, and finally exhaust air through the corresponding louvers.

[0048] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The specific working principle of the noise reduction structure of the energy storage device in this embodiment is as follows: The airflow and noise generated by the operation of the integrated energy storage unit 1 are discharged from the independent first air outlet 3 and second air outlet 4, and simultaneously enter the first air outlet duct 5 and second air outlet duct 6 of the noise reduction structure 2, which are adapted and connected to it. When the airflow flows in the corresponding air outlet, the sound-absorbing cotton 7 and the sound-absorbing cotton 8 of the first air outlet duct absorb the noise in their respective air outlets, achieving the first level of noise reduction. At the same time, since the two air outlet ducts are independent of each other, and the airflow from the first air outlet duct 5 flows along the right rear direction of the integrated energy storage unit 1 to the first air outlet area 10 of the outer shell 9, and the airflow from the second air outlet duct 6 flows along the left rear direction of the integrated energy storage unit 1 to the second air outlet area 11 of the outer shell 9, the two types of airflow and noise are dispersed and discharged, extending the air outlet travel and effectively avoiding noise superposition, achieving the second level of noise reduction. Finally, the airflow is discharged through the corresponding air outlet area. Without affecting the heat dissipation of the integrated energy storage unit 1, the overall noise reduction operation is completed through the dual effects of sound absorption by the sound-absorbing cotton and the separation of airflow to prevent noise superposition.

[0049] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In this embodiment, a noise reduction structure 2 embedded in the rear of the cabinet is installed on the energy storage unit 1, allowing the air outlet of the equipment to follow a dedicated air duct. Sound absorption and directional air outlet are also implemented. The specific process is as follows: When the energy storage unit 1 is running, airflow will exit from its independent first air outlet 3 and second air outlet 4, and enter the corresponding first air outlet duct 5 and second air outlet duct 6 in the noise reduction structure 2. The inner walls of these two ducts are lined with dedicated first air outlet sound-absorbing cotton 7 and second air outlet sound-absorbing cotton 8. As the airflow flows in the ducts, the noise will be directly absorbed by the sound-absorbing cotton.

[0050] Moreover, the air outlet directions of the two air ducts are separate. The air from the first air outlet duct 5 goes to the right rear of the energy storage unit 1, and the air from the second air outlet duct 6 goes to the left rear. Finally, they are discharged into the first air outlet area 10 and the second air outlet area 11 in the outer shell 9 of the noise reduction structure 2, respectively. This way, the air duct travel is not extended, and noise reduction is achieved.

[0051] Throughout the process, the extended independent air duct absorbs noise and the split air outlet avoids noise accumulation. Under the dual effect, the overall noise of the equipment operation can be effectively reduced. At the same time, the noise reduction structure 2 is embedded and does not protrude, so it will not affect the original size and space of the equipment.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A noise reduction structure for an energy storage device, characterized in that: It includes an integrated energy storage unit (1) and a noise reduction structure (2); The noise reduction structure (2) is located on the air outlet side of the cabinet of the integrated energy storage unit (1), and the integrated energy storage unit (1) is provided with a first air outlet (3) and a second air outlet (4) that are independent of each other. The noise reduction structure (2) forms a first air outlet duct (5) connected to the first air outlet (3) and a second air outlet duct (6) connected to the second air outlet (4). The first air outlet duct (5) and the second air outlet duct (6) are independently separated to extend the travel of the air outlet duct. The air outlet direction of the first air outlet duct (5) is far away from the air outlet direction of the second air outlet duct (6) and the air is dispersed from both sides of the noise reduction structure (2).

2. The noise reduction structure of an energy storage device according to claim 1, characterized in that: The noise reduction structure (2) has a first side louver, a first back louver (12), a second side louver (13), and a second back louver (14) on the side (19) and back (20) of the outer shell (9).

3. The noise reduction structure of an energy storage device according to claim 1, characterized in that: The noise reduction structure (2) is arranged sequentially with the electrical compartment (15) and battery compartment (16) of the integrated energy storage unit (1), and the noise reduction structure (2) is assembled at the air outlet of the electrical compartment (15) by a sealing strip (17).

4. The noise reduction structure of an energy storage device according to claim 2, characterized in that: The outer shell (9) includes an inner steel plate (18) that divides the internal space of the outer shell (9) into a first air outlet duct (5) and a second air outlet duct (6) that are independent of each other.

5. The noise reduction structure of an energy storage device according to claim 1, characterized in that: The first air outlet duct (5) and the second air outlet duct (6) are respectively covered with first air outlet sound-absorbing cotton (7) and second air outlet sound-absorbing cotton (8).

6. The noise reduction structure of an energy storage device according to claim 5, characterized in that: The first air duct sound-absorbing cotton (7) and the second air duct sound-absorbing cotton (8) are respectively attached to the inner walls of the first air outlet duct (5) and the second air outlet duct (6), and adjacent first air duct sound-absorbing cotton (7) and adjacent second air duct sound-absorbing cotton (8) are tightly attached.

7. The noise reduction structure of an energy storage device according to claim 1, characterized in that: The noise reduction structure (2) has an outer shell (9), and the inner ends of the outer shell (9) are respectively provided with a first air outlet area (10) and a second air outlet area (11). The first air outlet duct (5) and the second air outlet duct (6) are respectively connected to the first air outlet area (10) and the second air outlet area (11).

8. The noise reduction structure of an energy storage device according to claim 1, characterized in that: The noise reduction structure (2) is connected to the energy storage unit (1) by welding, snap-fitting or a combination thereof, and the cabinet of the noise reduction structure (2) and the energy storage unit (1) is either a separate connection or an integral molding.

9. The noise reduction structure of an energy storage device according to claim 2, characterized in that: The ratio of the noise reduction structure (2) to the cabinet depth of the energy storage unit (1) is 316mm~710mm:1000mm~1400mm.

10. The noise reduction structure of an energy storage device according to claim 2, characterized in that: The noise reduction structure has a first direction along the length of the noise reduction structure (2) and a second direction along the front to back of the energy storage unit (1); The length of the back (20) baffle directly opposite the first air outlet (3) or the second air outlet (4) in the first direction is L1, the length of the louver in the first direction is L2, and the length of the louver in the second direction is L3. The condition L1 > L3 and L1 + L2 > L3 is satisfied, so that the distance of the air duct from the side to the first air outlet (3) or the second air outlet (4) is greater than the distance from the back (20) to the first air outlet (3) or the second air outlet (4), thus extending the air duct travel.

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