A high-power energy storage converter inverter unit structure

Abstract

This invention provides a high-power energy storage converter inverter unit structure, including a capacitor bank structure and a power module structure. The capacitor bank structure includes an insulating frame, a stacked busbar at one end of the insulating frame, and a frame body at the other end of the insulating frame. A heat dissipation vent is provided below the insulating frame corresponding to the stacked busbar. Multiple capacitor banks are arranged within the frame body, each capacitor bank including multiple individually spaced capacitors. One end of the frame body is detachably mounted on the insulating frame, and the other end has a fixing plate for mounting individual capacitors. Multiple fixing plates are arranged corresponding to the capacitor banks, and each fixing plate is detachably mounted on the frame body. One end of each individual capacitor is detachably mounted on the fixing plate, and the other end is electrically connected to the stacked busbar. This high-power energy storage converter inverter unit structure has the advantages of easy installation, convenient disassembly and maintenance after installation, and good heat dissipation performance.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage equipment technology, and in particular relates to a high-power energy storage converter inverter unit structure. Background Technology

[0002] With the rapid growth of the energy storage industry as a whole, the energy storage inverter, as a key product of energy storage systems, is crucial for the normal operation of these systems. Its subsequent maintenance is paramount. The performance of the energy storage inverter directly affects the charging and discharging efficiency of the energy storage system and its subsequent economic benefits. The core unit of the energy storage inverter is its inverter unit. As the power of the power storage system (PCS) increases, the number of DC capacitors in the capacitor bank of the power unit also increases, leading to greater size and weight. Therefore, heat dissipation and disassembly become particularly important.

[0003] A Chinese utility model patent with application number 202322102146.4 discloses an energy storage PCS inverter unit structure, including a capacitor pool structure and a power module structure. The capacitor pool structure includes a mounting shell, which is a square frame. The mounting shell has a mounting plate at the bottom and a stacked busbar at the top. Several DC capacitor cells are evenly distributed inside the mounting shell. The bottom of the several DC capacitor cells is fixedly connected to the mounting plate by nuts. The top of the several DC capacitor cells is electrically connected to the stacked busbar. The power module structure is electrically connected to the capacitor pool structure.

[0004] However, the aforementioned structure uses a single mounting plate to house multiple capacitors. When a single capacitor malfunctions and needs replacement or inspection, the operator still needs to disassemble the entire mounting plate before replacement, resulting in inconvenience for disassembly and maintenance. Furthermore, the capacitor arrangement in this structure is quite compact, allowing only passive side cooling. It fails to create an efficient airflow path within the mounting housing, particularly lacking targeted cooling for the stacked busbars, leading to poor heat dissipation and affecting the overall equipment's operational stability. Additionally, the capacitor arrangement obstructs the connection between the front PON and power module structure, forcing the power module to be disassembled and replaced only from one side. However, after installation, the power module extends into the cabinet, making subsequent disassembly extremely difficult and hindering efforts to reduce the difficulty of maintenance after installation. Therefore, the existing inverter unit structure still suffers from poor heat dissipation and inconvenient disassembly and maintenance after installation. Utility Model Content

[0005] In view of this, the present invention aims to propose a high-power energy storage converter inverter unit structure to solve the problems that existing inverter unit structures still have poor heat dissipation after installation and inconvenient disassembly and maintenance.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A high-power energy storage converter inverter unit structure includes a capacitor bank structure and a power module structure. The capacitor bank structure includes an insulating frame, a stacked busbar at one end of the insulating frame, and a frame body at the other end of the insulating frame. A heat dissipation vent is provided below the insulating frame corresponding to the stacked busbar. The frame body contains multiple capacitor banks, each capacitor bank including multiple capacitor cells spaced apart. One end of the frame body is detachably mounted on the insulating frame, and the other end is provided with a fixing plate for mounting the capacitor cells. Multiple fixing plates are provided corresponding to the capacitor banks, and each fixing plate is detachably mounted on the frame body. One end of the capacitor cell is detachably mounted on the fixing plate, and the other end is electrically connected to the stacked busbar.

[0008] Furthermore, the frame includes heat dissipation windows and side panels. Two heat dissipation windows are provided below and above the insulating frame, and two side panels are provided on the left and right sides of the insulating frame. The heat dissipation windows are detachably connected to the side panels, the heat dissipation windows are detachably connected to the insulating frame, and the side panels are detachably connected to the insulating frame.

[0009] Furthermore, the fixing plate is provided with heat dissipation holes at the positions corresponding to individual capacitors.

[0010] Furthermore, the heat dissipation holes are C-shaped.

[0011] Furthermore, the stacked busbar is provided with a front PON for connecting the power module structure, and a positive terminal block and a negative terminal block are provided at the position corresponding to the heat dissipation port below the stacked busbar. A side PON terminal block is also provided on one side of the stacked busbar.

[0012] Furthermore, the fixing plate is provided with a detachable baffle at the position corresponding to the front PON of the stacked busbar, and the individual capacitors in the capacitor group are misaligned with the front PON of the stacked busbar.

[0013] Furthermore, the fixing plate is provided with mounting holes for mounting the baffle. The baffle is detachably mounted on the fixing plate above by fixing screws, and the baffle is provided with a plug-in part below that can mate with the edge of the mounting hole.

[0014] Furthermore, the cross-section of the fixing plate is U-shaped.

[0015] Compared with existing technologies, the high-power energy storage converter inverter unit structure described in this utility model has the following advantages:

[0016] The high-power energy storage converter inverter unit structure described in this utility model has the advantages of easy installation, convenient disassembly and maintenance after installation, and good heat dissipation performance. By using an insulating frame to connect the laminated busbar and the frame body, not only can the frame body and the laminated busbar be well supported and fixed, improving the stability of the connection between the capacitor cells and the laminated busbar, but also, by setting heat dissipation vents at the position corresponding to the laminated busbar below the insulating frame, together with the heat dissipation windows set at the top and bottom of the frame body, an air flow path can be formed within the frame body, achieving efficient heat dissipation of the capacitor cells and the laminated busbar, which is conducive to improving the operational stability of this inverter unit structure. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a high-power energy storage converter inverter unit according to an embodiment of the present invention;

[0019] Figure 2 This is an exploded view of the capacitor pool structure in the inverter unit structure of a high-power energy storage converter according to an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the baffle plate in the inverter unit structure of a high-power energy storage converter according to an embodiment of this utility model.

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

[0022] 1. Capacitor cell structure; 2. Power module structure; 3. Heat dissipation window; 4. Side plate; 5. Fixing plate; 6. Baffle; 7. Individual capacitor; 8. Heat dissipation hole; 9. Insulating frame; 10. Laminated busbar; 11. Front PON; 12. Side PON terminal block; 13. Positive terminal block; 14. Negative terminal block; 15. Plug-in part. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] A high-power energy storage converter inverter unit structure, such as Figures 1 to 3 As shown, the structure includes a capacitor bank structure 1 and a power module structure 2. The capacitor bank structure 1 includes an insulating frame 9, a stacked busbar 10 disposed at one end of the insulating frame 9, and a frame body disposed at the other end of the insulating frame 9. A heat dissipation vent is provided below the insulating frame 9 at a position corresponding to the stacked busbar 10, and the heat dissipation vent communicates with the interior of the frame body. The frame body contains multiple capacitor banks, each capacitor bank including multiple capacitor cells 7 spaced apart. One end of the frame body is detachably mounted on the insulating frame 9, and the other end is provided with a fixing plate 5 for mounting the capacitor cells 7. Multiple fixing plates 5 are provided corresponding to the capacitor banks, and each fixing plate 5 is detachably mounted on the frame body. One end of the capacitor cell 7 is detachably mounted on the fixing plate 5, and the other end is electrically connected to the stacked busbar 10.

[0028] For example, the insulating frame 9 is an inverted U-shaped structure to facilitate the formation of a heat dissipation vent at the bottom. The insulating frame 9 can be made of insulating materials such as rubber or plastic, while the frame body can be made of sheet metal parts such as aluminum alloy to improve the heat dissipation performance of the frame body. The insulating frame 9 provides good insulation and isolation between the frame body and the stacked busbar 10. Meanwhile, the stacked busbar 10 is mounted on the insulating frame 9 using conventional methods such as screws. The insulating frame 9 provides good support and fixation for the frame body and the stacked busbar 10, which helps improve the stability of the connection between the capacitor cell 7 and the stacked busbar 10.

[0029] Specifically, the stacked busbar 10 is provided with a front PON 11 for connecting the power module structure 2. The bottom of the stacked busbar 10 is provided with a positive terminal block 13 and a negative terminal block 14 corresponding to the heat dissipation vent. The stacked busbar 10 is also provided with a side PON terminal block 12 on one side. The side PON terminal block 12 can be used to connect external monitoring equipment to realize the detection of the equipment's operating status. Those skilled in the art can choose according to actual needs, which will not be elaborated here.

[0030] In practical applications, the stacked busbar 10 has a multi-layer structure, including several layers of conductive plates and insulating paper. The conductive plates and insulating paper are alternately arranged. The side PON terminal 12 can be connected to the conductive plate by copper pillar connection to reduce the difficulty of assembly and subsequent wiring. The front PON, positive terminal block 13, and negative terminal block 14 can also be connected to the conductive plate by conventional electrical connection. Those skilled in the art can choose the appropriate method according to actual needs. This embodiment does not involve the improvement of the stacked busbar 10, so it will not be described in detail here.

[0031] Preferably, the frame includes heat dissipation windows 3 and side plates 4. Two heat dissipation windows 3 are provided below and above the insulating frame 9, and two side plates 4 are provided on the left and right sides of the insulating frame 9. The heat dissipation windows 3 and side plates 4, the heat dissipation windows 3 and insulating frame 9, and the side plates 4 and insulating frame 9 are all detachably connected. For example, conventional methods such as screws can be used to achieve detachable connections, which will not be elaborated here.

[0032] In practical applications, the fixing plate 5 can be detachably installed on the side plate 4 using conventional methods such as screws. The detachable frame structure also facilitates the assembly and disassembly of the frame, reducing the difficulty of assembly and maintenance. Furthermore, by providing heat dissipation windows 3 at both the top and bottom of the frame, airflow pathways can be formed within the frame, achieving efficient heat dissipation for the individual capacitors 7. Simultaneously, in conjunction with the heat dissipation vents on the insulating frame 9, multiple air intakes can be formed at the bottom of the frame, ultimately exhausting through the heat dissipation windows 3 at the top, achieving efficient heat dissipation for the laminated busbar 10.

[0033] Preferably, a detachable baffle 6 is provided on the fixing plate 5 at the position corresponding to the front PON11 of the stacked busbar 10, and the individual capacitors 7 in the capacitor group are offset from the front PON11 of the stacked busbar 10. For example, the fixing plate 5 is provided with mounting holes for installing the baffle 6, the baffle 6 is detachably mounted on the fixing plate 5 with fixing screws, and the baffle 6 has a plug-in portion 15 below it that can mate with the edge of the mounting hole.

[0034] In practical applications, by disassembling the baffle 6, the individual capacitors 7 inside the frame can be exposed for inspection by the operator. At the same time, the connection between the front PON11 of the stacked busbar 10 and the power module structure 2 can also be exposed for inspection by the operator. The operation is very simple and avoids the need to disassemble the entire fixing plate 5.

[0035] Preferably, the fixing plate 5 has heat dissipation holes 8 corresponding to the positions of the capacitor cells 7. For example, the heat dissipation holes 8 are C-shaped. Compared to other shapes, the C-shaped heat dissipation holes 8 not only have a larger heat dissipation area, enabling direct heat dissipation of the capacitor cells 7, but also allow the capacitor cells 7 to be installed at the center of the heat dissipation holes 8 without affecting the stability of the capacitor cells 7 after installation. By providing heat dissipation holes 8 on the fixing plate 5, not only can the direct heat dissipation requirements of the capacitor cells 7 be met, but indirect heat dissipation of the capacitor cells 7 can also be achieved through the airflow channels formed on the frame, which is beneficial to further improve the heat dissipation effect of the capacitor cells 7 and ensure the stability and reliability of the capacitor cells 7 during use.

[0036] Specifically, the capacitor unit 7 can be an existing DC capacitor unit. The DC capacitor unit provided in this embodiment is a cylinder. Three, four, five or more layers of capacitor units 7 can be set in the frame. Multiple fixing plates 5 can also be set. Each layer of capacitor group can be set with one fixing plate 5, or two layers of capacitor groups can share one fixing plate 5. For example, five layers of capacitor groups can be set and four fixing plates 5 can be set. The top two capacitor groups share one fixing plate 5. The front PON11 of the stacked busbar 10 is set with the top fixing plate 5. Those skilled in the art can choose according to actual needs, which will not be elaborated here.

[0037] In practical applications, several DC capacitor cells are connected to the fixing plate 5 at one end via nuts, and electrically connected to the stacked busbar 10 at the other end via conventional means. The power module structure 2 is electrically connected to the capacitor pool structure 1. The bottom of the power module structure 2 and the bottom of the capacitor pool structure 1 are on the same plane, which facilitates a more stable electrical connection, forms a whole, and makes disassembly convenient. By using multiple fixing plates 5 to install and fix the capacitor cells 7, when a capacitor cell 7 in a certain layer of capacitor group needs to be replaced, the operator can simply remove the fixing plate 5 corresponding to that group to easily replace the capacitor cell 7, avoiding the impact on other layers of capacitor groups and improving assembly and maintenance efficiency.

[0038] Preferably, the fixing plate 5 has a U-shaped cross-section. Compared with other structures, the U-shaped fixing plate 5 has higher structural strength, and there are protrusions on both the top and bottom of the fixing plate 5 for easy gripping, facilitating subsequent disassembly and assembly. Furthermore, after multiple fixing plates 5 are installed on the frame, the edges of the upper and lower layers of fixing plates 5 can fit together, which helps to increase the contact area between the upper and lower layers of fixing plates 5, thereby further improving the stability of the fixing plates 5 on the frame.

[0039] The high-power energy storage converter inverter unit structure described in this utility model has the advantages of easy installation, convenient disassembly and maintenance after installation, and good heat dissipation performance. By using an insulating frame to connect the laminated busbar and the frame body, not only can the frame body and the laminated busbar be well supported and fixed, improving the stability of the connection between the capacitor cells and the laminated busbar, but also, by setting heat dissipation vents at the position corresponding to the laminated busbar below the insulating frame, together with the heat dissipation windows set at the top and bottom of the frame body, an air flow path can be formed within the frame body, achieving efficient heat dissipation of the capacitor cells and the laminated busbar, which is conducive to improving the operational stability of this inverter unit structure.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-power energy storage converter inverter cell structure comprising a capacitor bank structure (1) and a power module structure (2), characterized in that: The capacitor bank structure (1) includes an insulating frame (9), a stacked busbar (10) at one end of the insulating frame (9), and a frame body at the other end of the insulating frame (9). A heat dissipation port is provided below the insulating frame (9) at the position corresponding to the stacked busbar (10). The frame body is provided with multiple capacitor banks, each capacitor bank including multiple capacitor cells (7) spaced apart. One end of the frame body is detachably mounted on the insulating frame (9), and the other end is provided with a fixing plate (5) for mounting the capacitor cells (7). Multiple fixing plates (5) are provided corresponding to the capacitor banks. Each fixing plate (5) is detachably mounted on the frame body. One end of the capacitor cell (7) is detachably mounted on the fixing plate (5), and the other end is electrically connected to the stacked busbar (10).

2. A high power energy storage inverter cell structure according to claim 1, characterized in that: The frame includes heat dissipation windows (3) and side plates (4). Two heat dissipation windows (3) are provided below and above the insulating frame (9), and two side plates (4) are provided on the left and right sides of the insulating frame (9). The heat dissipation windows (3) and side plates (4), the heat dissipation windows (3) and insulating frame (9), and the side plates (4) and insulating frame (9) are all detachably connected.

3. The high-power energy storage inverter unit structure of claim 1, wherein: The fixing plate (5) is provided with heat dissipation holes (8) at the positions corresponding to the capacitor cells (7).

4. The inverter unit structure of a high-power energy storage converter according to claim 3, characterized in that: The heat dissipation hole (8) is C-shaped.

5. The inverter unit structure of a high-power energy storage converter according to claim 1, characterized in that: The stacked busbar (10) is provided with a front PON (11) for connecting the power module structure (2). A positive terminal block (13) and a negative terminal block (14) are provided below the stacked busbar (10) at the position corresponding to the heat dissipation port. A side PON terminal block (12) is also provided on one side of the stacked busbar (10).

6. The inverter unit structure of a high-power energy storage converter according to claim 5, characterized in that: The fixing plate (5) is provided with a detachable baffle (6) at the position corresponding to the front PON (11) on the stacked busbar (10), and the capacitor cells (7) in the capacitor group are misaligned with the front PON (11) on the stacked busbar (10).

7. The inverter unit structure of a high-power energy storage converter according to claim 6, characterized in that: The fixing plate (5) is provided with an assembly hole for installing the baffle (6). The baffle (6) is detachably mounted on the fixing plate (5) above by fixing screws. The baffle (6) is provided with an insertion part (15) below that can cooperate with the edge of the assembly hole.

8. The inverter unit structure of a high-power energy storage converter according to claim 1, characterized in that: The cross-section of the fixing plate (5) is U-shaped.

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