Mesh construction type all-vanadium redox flow energy storage converter

Abstract

The invention relates to the technical field of net construction type all-vanadium liquid flow energy storage converters, in particular to a net construction type all-vanadium liquid flow energy storage converter. The double-spliced cabinet comprises a double-spliced cabinet body, and the interior of the double-spliced cabinet body is divided into a top air inlet area, a middle functional area and a bottom air outlet area; the alternating current pre-charging loop module is arranged on one side, close to a bottom air outlet area, in a middle functional area of the double-spliced cabinet body; the direct current pre-charging loop module is arranged on the outer wall of the middle functional area of the double-spliced cabinet body and forms thermal isolation with the interior of the double-spliced cabinet body; the fan is arranged on one side, close to the top air inlet area, in the middle functional area of the double-spliced cabinet body; the fan can suck air outside the double-spliced cabinet body into the top air inlet area, and the air passes through the middle functional area and is discharged from the bottom air outlet area, so that heat dissipation is carried out on devices in the middle functional area, temperature rise in the cabinet under high loop temperature and high power is controlled, and the use safety of the net-forming type all-vanadium redox flow energy storage converter is ensured.

Description

Technical Field

[0001] This invention relates to the field of grid-type all-vanadium redox flow energy storage converter technology, and specifically to a grid-type all-vanadium redox flow energy storage converter. Background Technology

[0002] Grid-based energy storage converters are core equipment in new power systems, capable of simulating the voltage and frequency regulation characteristics of synchronous generators and providing inertia and damping support for the power grid. Traditional grid-connected converters rely on the grid voltage phase and are prone to instability in weak grids or islanded modes. Grid-based technology, however, autonomously constructs the grid voltage through virtual synchronous machine algorithms, significantly improving the system's disturbance rejection capability. Vanadium redox flow batteries are considered an ideal choice for long-term energy storage due to their high safety, long cycle life, and decoupled power and capacity design. Their electrolyte is an aqueous solution, eliminating the risk of combustion.

[0003] In traditional applications, grid-type energy storage converters are mainly used in conjunction with lithium batteries, while grid-type energy storage converters used in conjunction with vanadium redox flow batteries are rare. Vanadium redox flow batteries are more sensitive to high temperatures, and given the special requirements of high ambient temperature and high power in current energy storage stations, existing grid-type energy storage converters are difficult to directly adapt to vanadium redox flow batteries. Summary of the Invention

[0004] The purpose of this invention is to provide a grid-type vanadium redox flow converter, which uses a fan to form an external circulation duct to dissipate heat from all components in the central functional area of ​​the double-panel cabinet, and externally places the DC precharge circuit module to control the temperature rise inside the cabinet under high ambient temperature and high power, thereby ensuring the safe use of the grid-type vanadium redox flow converter.

[0005] This invention provides a grid-type all-vanadium redox flow converter, comprising: The cabinet is divided into a top air intake area, a middle functional area, and a bottom air outlet area. An AC pre-charge circuit module is located in the central functional area of ​​the double-unit cabinet, on one side near the bottom air outlet area; A DC precharge circuit module is installed on the outer wall of the central functional area of ​​the double-unit cabinet and forms thermal insulation between it and the interior of the double-unit cabinet. A fan is located in the middle functional area of ​​the double-panel cabinet, near the top air intake area. The fan can draw air from outside the double-panel cabinet into the top air intake area and then through the middle functional area to the bottom air outlet area to dissipate heat from the components in the middle functional area.

[0006] Optionally, a flat-panel external hood is embedded on the outer wall of the top air intake area of ​​the double-panel cabinet, allowing air from outside the double-panel cabinet to enter the top air intake area through the flat-panel external hood.

[0007] Optionally, the flat-panel external hoods on the front and back outer walls of the top air intake area of ​​the double-panel cabinet adopt a parallel multi-hood structure, while the flat-panel external hoods on the side outer walls of the top air intake area of ​​the double-panel cabinet adopt a single-hood structure.

[0008] Optionally, the AC precharge circuit module is located on a secondary fixing panel in the central functional area of ​​the double-unit cabinet, and the secondary fixing panel is fastened to the main load-bearing beam of the double-unit cabinet; the secondary fixing panel is also equipped with an air switch, a rectifier bridge, a DC contactor and an AC contactor.

[0009] Optionally, the outer wall of the central functional area on the side of the double-unit cabinet away from the AC precharge circuit module is provided with an outwardly protruding shell. The outwardly protruding shell is provided with multiple horizontal beams that are fixedly connected to the vertical beams on the outer wall of the double-unit cabinet. The DC precharge resistor of the DC precharge circuit module is provided on the horizontal beam. The number of DC precharge resistors on the horizontal beam is determined according to the requirements.

[0010] Optionally, the edge of the convex shell adopts an outward flange structure, and the outward flange structure is inserted into the side bubble sealing strip for sealing; a heat insulation board is provided between the convex shell and the cabinet to form thermal isolation.

[0011] Optionally, the central functional area of ​​the double-unit cabinet is provided with a modular heat sink and an internal reactor air cavity; air from outside the double-unit cabinet is drawn into the top air intake area, passes through the modular heat sink and the internal reactor air cavity, and is then discharged from the bottom air outlet area.

[0012] Optionally, the top air intake area and the middle functional area of ​​the double-panel cabinet are separated by a flat plate, and the middle functional area and the bottom air outlet area of ​​the double-panel cabinet are isolated by a sealing plate.

[0013] Optionally, the central functional area of ​​the dual-unit cabinet adopts a split structure, and the central functional area of ​​the dual-unit cabinet is provided with a split modular support plane. A module limiting plate is provided on the module support plane to limit the vanadium redox flow battery placed on the module support plane.

[0014] Optionally, multiple fans are arranged side by side, and the multiple fans can form multiple air paths to dissipate heat from the devices in the central functional area.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a fan to create an external circulating air duct within the double-panel cabinet to dissipate heat from all components in the central functional area. Furthermore, by placing the DC pre-charge circuit module outside the central functional area and providing thermal isolation, it effectively prevents the DC pre-charge circuit module from increasing the cabinet's internal temperature rise during operation and also avoids the module being affected by hot air from within the cabinet. This effectively controls the internal temperature rise under high ambient temperatures and high power conditions, ensuring the safe operation of the grid-type vanadium redox flow converter. Attached Figure Description

[0016] Figure 1 An external view of a grid-type all-vanadium redox flow energy storage converter as provided in one embodiment of the present invention. Figure 2 A cantilever diagram of a grid-type all-vanadium redox flow energy storage converter according to an embodiment of the present invention. Figure 3 A cross-sectional view of a grid-type all-vanadium redox flow energy storage converter according to an embodiment of the present invention.

[0017] Numbering on the map: 101. Double-panel cabinet; 1. Cabinet top; 2. Upper sealing panel; 3. Lower sealing panel; 102. Cabinet top air duct; 401. Double-channel external air hood; 402. Single-channel external air hood; 501. Upper cabinet door; 502. Lower cabinet door; 601. Air outlet channel; 602. Cabinet bottom; 7. First hinge; 701. Second hinge; 8. DC pre-charge circuit module; 801. DC pre-charge resistor; 802. DC contactor; 9. Crossbeam; 10. Outward-flaring structure; 1001. Integrated structure; 11. Secondary fixing panel; 1101. Air switch; 1102. AC contactor; 1103. Rectifier bridge; 12. First vertical beam; 1201. Second vertical beam; 13. Thermal insulation board; 14. Z-shaped support; 15. Main load-bearing crossbeam; 16. Flat plate; 17. Sealing plate; 18. Module support plane; 19. First cooling fan; 20. Module heat sink; 21. Reactor air cavity; 1901. Second cooling fan; 2201. Top air intake area; 2202. Middle functional area; 2203. Bottom air outlet area. Detailed Implementation

[0018] In the description of this invention, 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention 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 the invention. 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, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0020] To make the purpose, technical solution, and advantages of this invention patent clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] This embodiment provides a grid-type all-vanadium redox flow energy storage converter, which includes a double-panel cabinet 101, an AC precharge circuit module 8, a DC precharge circuit module, and a fan.

[0022] like Figure 1 As shown, the top 1 of the double-panel cabinet 101 adopts a flat top structure. The sides of the double-panel cabinet 101 adopt a split panel structure of upper panel 2 and lower panel 3. The front of the double-panel cabinet 101 adopts an integral cabinet door structure. The cabinet door is fixed to the double-panel cabinet 101 by the first hinge 7. The back of the double-panel cabinet 101 adopts a split structure of upper cabinet door 501 and lower cabinet door 502. Both upper cabinet door 501 and lower cabinet door 502 are fixed to the double-panel cabinet 101 by the second hinge 701.

[0023] like Figure 2 and Figure 3As shown, the double-unit cabinet 101 is internally divided into a top air intake area 2201, a middle functional area 2202, and a bottom air outlet area 2203. The top air intake area 2201 and the middle functional area 2202 of the double-unit cabinet 101 are separated by a flat plate 16, and the middle functional area 2202 and the bottom air outlet area 2203 of the double-unit cabinet 101 are separated by a sealing plate 17.

[0024] The top and bottom of the double-unit cabinet 101 adopt an integrated structure 1001. The middle functional area 2202 of the double-unit cabinet 101 adopts a split structure. The middle functional area 2202 of the double-unit cabinet 101 is provided with a split module support plane 18. A module limiting plate is provided on the module support plane 18 to limit the vanadium redox flow battery placed on the module support plane.

[0025] like Figure 1 As shown, a flat-panel external air hood is embedded in the outer wall of the top air intake area 2201 of the double-unit cabinet 101, allowing air from outside the double-unit cabinet 101 to enter the top air intake area 2201 through the flat-panel external air hood. The flat-panel external air hoods on the front and back outer walls of the top air intake area 2201 of the double-unit cabinet 101 both adopt a parallel multi-hood structure 401, while the flat-panel external air hoods on the side outer walls of the top air intake area 2201 of the double-unit cabinet 101 adopt a single-hood structure 402. The flat-panel external air hoods are fixed to the double-unit cabinet 101 by a Z-shaped support 14.

[0026] like Figure 1 , Figure 2 As shown, the AC precharge circuit module is located in the central functional area 2202 of the double-unit cabinet 101, near the bottom air outlet area 2203 on one side; the AC precharge circuit module is located on the secondary fixing panel 11 in the central functional area 2202 of the double-unit cabinet 101, and the secondary fixing panel 11 is fastened to the main load-bearing crossbeam 15 of the double-unit cabinet 101; the secondary fixing panel 11 is also equipped with an air switch 1101, a rectifier bridge 1103, a DC contactor 802 and an AC contactor 1102.

[0027] like Figure 1 , Figure 2As shown, the DC precharge circuit module 8 is located on the outer wall of the central functional area 2202 of the double-unit cabinet 101, away from the AC precharge circuit module, and forms thermal isolation with the interior of the double-unit cabinet 101. A protruding shell is provided on the outer wall of the central functional area 2202 of the double-unit cabinet 101. Multiple horizontal beams 9 are fixedly connected to the vertical beams on the outer wall of the double-unit cabinet 101 within the protruding shell. The vertical beams include a first vertical beam 12 and a second vertical beam 1201. The DC precharge resistor 801 of the DC precharge circuit module 8 is located on the horizontal beam 9. The horizontal beams 9 are adjustable, and the number of DC precharge resistors 801 on the horizontal beams 9 can be configured according to requirements. The edge of the protruding shell adopts an outward-flaring structure 10, which is sealed by a side bubble sealing strip. A heat-insulating plate 13 is provided between the protruding shell and the double-unit cabinet 101 to form thermal isolation.

[0028] like Figure 1 and Figure 3 As shown, the fan is located in the central functional area 2202 of the double-unit cabinet 101, near the top air intake area 2201. The fan draws air from outside the double-unit cabinet 101 into the top air intake area 2201, passes through the central functional area 2202, and exits through the bottom air outlet area 2203, forming a double-unit external main circulation cooling air duct to dissipate heat from the components within the central functional area 2202. Multiple fans are arranged side by side, and these multiple fans can form multiple air paths to dissipate heat from the components within the central functional area.

[0029] In one specific embodiment, the dual-panel external main circulation cooling air duct includes a cabinet top air duct 102 that serves as an air intake channel at the top, and an air outlet channel 601 opened at the bottom 602 of the dual-panel cabinet 101. The dual-panel external main circulation cooling air duct is independently controlled, and two high-power fans (first cooling fan 19 and second cooling fan 1901) are installed inside the dual-panel cabinet 101. The external main circulation air duct is formed by two fans drawing air from the outside through a flat external hood. The two air paths pass through the module heat sink 20 in the central functional area 2202, then through the reactor air cavity 21 inside the cabinet, and finally through the bottom of the cabinet around the perimeter.

[0030] This embodiment provides a grid-type vanadium redox flow battery energy storage converter that can adapt to the characteristics of vanadium redox flow batteries and grid technology. Based on the dual-cabinet structure and internal and external circulation heat dissipation duct scheme under high power demand, it meets the energy storage needs in the field of vanadium redox flow batteries.

[0031] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A grid-type all-vanadium redox flow converter, characterized in that, include: The double-panel cabinet (101) is divided into a top air intake area (2201), a middle functional area (2202), and a bottom air outlet area (2203). The AC pre-charge circuit module is located in the middle functional area (2202) of the double-panel cabinet (101) on one side near the bottom air outlet area (2203); The DC precharge circuit module (8) is located on the outer wall of the central functional area (2202) of the double-unit cabinet 101, away from the AC precharge circuit module, and forms thermal isolation with the interior of the double-unit cabinet (101). A fan is located in the middle functional area (2202) of the double-panel cabinet (101) on one side near the top air intake area (2201); the fan can draw air from outside the double-panel cabinet (101) into the top air intake area (2201) and through the middle functional area (2202) to exhaust air from the bottom air outlet area (2203) to dissipate heat from the components in the middle functional area (2202).

2. The grid-type all-vanadium redox flow converter according to claim 1, characterized in that, The top air intake area (2201) of the double-panel cabinet (101) is fitted with a flat-panel external air hood, and air from outside the double-panel cabinet (101) can enter the top air intake area (2201) through the flat-panel external air hood.

3. The grid-type all-vanadium redox flow converter according to claim 1, characterized in that, The flat-panel external hoods on the front and back outer walls of the top air intake area (2201) of the double-panel cabinet (101) adopt a parallel multi-hood structure (401), while the flat-panel external hoods on the side outer walls of the top air intake area of ​​the double-panel cabinet adopt a single-hood structure (402).

4. A grid-type all-vanadium redox flow converter according to claim 1, characterized in that, The AC precharge circuit module is located on the secondary fixing panel (11) in the central functional area (2202) of the double-unit cabinet (101). The secondary fixing panel (11) is fastened to the main load-bearing beam (15) of the double-unit cabinet (101). The secondary fixing panel (11) is also equipped with an air switch (1101), a rectifier bridge (1103), a DC contactor (802), and an AC contactor (1102).

5. A grid-type all-vanadium redox flow converter according to claim 1, characterized in that, The outer wall of the central functional area (2202) of the double-unit cabinet (101) away from the AC precharge circuit module is provided with an outward protruding shell. The outward protruding shell is provided with a number of horizontal beams (9) that are fixedly connected to the vertical beams on the outer wall of the double-unit cabinet (101). The DC precharge resistor (801) of the DC precharge circuit module (8) is located on the horizontal beam (9). The number of DC precharge resistors (801) on the horizontal beam (9) is determined according to the requirements.

6. A grid-type all-vanadium redox flow converter according to claim 5, characterized in that, The edge of the convex shell adopts an outward flange structure (10), and the outward flange structure (10) is fitted into the side bubble sealing strip for sealing; a heat insulation board (13) is provided between the convex shell and the double cabinet (101) to form thermal isolation.

7. A grid-type all-vanadium redox flow converter according to claim 1, characterized in that, The central functional area (2202) of the double-unit cabinet (101) is equipped with a module heat sink (20) and a cabinet reactor air cavity (21); the air outside the double-unit cabinet (101) is drawn into the top air intake area (2201), passes through the module heat sink (20) and the cabinet reactor air cavity (21), and then exits from the bottom air outlet area (2203).

8. A grid-type all-vanadium redox flow converter according to claim 1, characterized in that, The top air intake area (2201) and the middle functional area (2202) of the double-panel cabinet (101) are separated by a flat plate (16), and the middle functional area (2202) and the bottom air outlet area (2203) of the double-panel cabinet (101) are isolated by a sealing plate.

9. A grid-type all-vanadium redox flow converter according to claim 1, characterized in that, The central functional area (2202) of the double-unit cabinet (101) adopts a split structure. The central functional area (2202) of the double-unit cabinet (101) is provided with a split module support plane (18). A module limiting plate is provided on the module support plane (18) to limit the vanadium redox flow battery placed on the module support plane.

10. A grid-type all-vanadium redox flow converter for energy storage according to claim 1, characterized in that, Multiple fans are arranged side by side, and these fans can form multiple air paths to dissipate heat from the components in the central functional area.

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