Water-cooled energy storage converter

Abstract

This utility model discloses a water-cooled energy storage converter, including a cabinet. The cabinet is divided into an independent electrical cavity, a reactor cavity, and a water-cooling cavity, with the water-cooling cavity positioned at the top. The water-cooling cavity and the electrical cavity are interconnected for water circulation heat exchange. The reactor cavity is independently cooled by forced air cooling or water cooling. This utility model features a compact structure, high space utilization, high stability, and good heat dissipation. The water-cooling system is integrated inside the converter, minimizing the cabinet size and significantly reducing transportation and land costs. It overcomes the shortcomings of existing water-cooled converters, such as low integration and large footprint.

Description

Technical Field

[0001] This utility model relates to the field of new energy power electronic equipment technology, specifically to a water-cooled energy storage converter. Background Technology

[0002] The energy storage converter (PCS) is a bidirectional DC / AC converter suitable for the charging and discharging control of battery systems. It meets the functional requirements of active power regulation and reactive power control, and is a key component in energy storage systems.

[0003] The electronic components inside an energy storage converter generate a significant amount of heat during operation. If this heat cannot be dissipated in time, it can lead to overheating and damage to the components. Existing outdoor energy storage converters typically employ forced air cooling, requiring the design of a compliant overall cooling duct. This design is complex, and the duct is difficult to clean. It also struggles to meet the high protection requirements of some components inside the cabinet, and issues such as clogged dust filters, internal contamination leading to insulation failure, and even generator failure frequently occur.

[0004] Currently, energy storage integration projects are developing towards larger scale and higher energy density, and the heat dissipation requirements of PCS are becoming increasingly higher. Water-cooled PCS can bring better performance indicators and better environmental adaptability.

[0005] However, most centralized water-cooled converters (wind power, energy storage) on the market use non-integrated water-cooling systems, which require separate external water-cooling cabinets, resulting in low integration and large footprint. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a water-cooled energy storage converter that is compact, has high space utilization, high stability and good heat dissipation, addressing the shortcomings of existing water-cooled converters such as low integration and large footprint.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A water-cooled energy storage converter includes a cabinet, which is divided into an independent electrical cavity, a reactor cavity, and a water-cooled cavity, with the water-cooled cavity located at the top. The water-cooled cavity and the electrical cavity are connected to each other for water circulation heat exchange. The reactor cavity is independently cooled by forced air cooling or water cooling.

[0009] As a further improvement of this utility model, the electrical cavity is provided with multiple power modules and an internal circulation heat exchanger. The power modules have integrated water-cooled plates inside and are located above the internal circulation heat exchanger. The water-cooled cavity is provided with a water pump and an external circulation heat exchanger. The external circulation heat exchanger is connected to an external cold source and is connected to the water-cooled plates of the power modules and the internal circulation heat exchanger through inlet and outlet water pipes. A water pump is provided on the inlet water pipe to realize water circulation heat exchange within the electrical cavity.

[0010] As a further improvement of this utility model, the water-cooled cavity is also provided with a water tank, which is connected to the external circulation heat exchanger and the water inlet pipe respectively, for storing and replenishing cooling water.

[0011] As a further improvement of this utility model, the water-cooled cavity is also provided with multiple external circulation fans, and the front and rear sides of the cabinet are respectively provided with air inlets and air outlets. The external circulation fans are used to draw cold air from outside the cabinet into the water-cooled cavity to dissipate heat and cool the external circulation heat exchanger.

[0012] As a further improvement of this utility model, the electrical cavity is also provided with multiple internal circulation fans, which are located between the power module and the internal circulation heat exchanger to drive air to circulate inside the electrical cavity.

[0013] As a further improvement of this utility model, the electrical cavity is also provided with a capacitor bank and an AC filter capacitor. The capacitor bank and the AC filter capacitor are both located behind the power module and above the internal circulation heat exchanger.

[0014] As a further improvement of this utility model, the electrical cavity is also provided with a capacitor bank fan, which is located above the capacitor bank for air cooling of the capacitor bank.

[0015] As a further improvement of this utility model, the electrical cavity is also provided with an AC switch and a DC switch, both of which are located behind the reactor.

[0016] As a further improvement of this utility model, the reactor cavity is provided with a reactor and a plurality of reactor cooling fans, and the reactor cooling fans are located above the reactor for forced air cooling of the reactor.

[0017] As a further improvement of this utility model, the side of the reactor cavity is provided with a reactor air inlet, and the bottom of the reactor cavity is provided with a reactor air outlet.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] This utility model's water-cooled energy storage converter divides the cabinet into independently isolated electrical, reactor, and water-cooling chambers, with the water-cooling chamber positioned at the top and interconnected with the electrical chambers for water circulation heat exchange. The reactor chamber utilizes forced air or water cooling for independent heat dissipation. This design allows for a rational and compact layout of components within the cabinet, improving space utilization. By using water cooling for the energy storage converter, superior heat dissipation performance is achieved, reaching an IP65 protection rating, making it well-suited for complex outdoor environments with high humidity, high salinity, and dust and pollen. The water-cooled PCS significantly increases power density, and integrating the water cooling system within the converter minimizes cabinet size, thereby significantly reducing transportation and land costs. Attached Figure Description

[0020] Figure 1 This is a simplified front view of the overall cabinet layout of the water-cooled energy storage converter in a specific embodiment of this utility model;

[0021] Figure 2 This is a simplified left-side view of the overall cabinet layout of the water-cooled energy storage converter in a specific embodiment of this utility model;

[0022] Figure 3 This is a simplified top view of the overall cabinet layout of the water-cooled energy storage converter in a specific embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the cabinet layout of the water-cooled energy storage converter in a specific embodiment of this utility model (left view).

[0024] Figure 5 This is a schematic diagram of the main layout principle of the water-cooled energy storage converter in a specific embodiment of this utility model;

[0025] Figure 6 This is a rear view schematic diagram of the overall cabinet layout of the water-cooled energy storage converter in a specific embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the airflow direction of the entire cabinet in a specific embodiment of this utility model;

[0027] Legend: 100, Cabinet; 101, Electrical Chamber; 102, Reactor Chamber; 103, Water-cooled Chamber; 1, Power Module; 2, Reactor; 3, Capacitor Pool; 4, DC Frame; 5, AC Frame; 6, Water Pump; 7, Water Tank; 8, External Circulation Heat Exchanger; 9, External Circulation Fan; 10, Internal Circulation Heat Exchanger; 11, AC Filter Capacitor; 12, AC Switch; 13, Internal Circulation Fan; 14, Reactor Cooling Fan; 15, DC Switch; 16, Capacitor Pool Fan. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0029] In the description of this utility model, it should be understood that the terms "side", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship 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.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0031] Example

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, the water-cooled energy storage converter of this utility model includes a cabinet 100, which is divided into an independent electrical cavity 101, a reactor cavity 102, and a water-cooled cavity 103, with the water-cooled cavity 103 positioned at the top. This ensures that the heat from each cavity does not interfere with each other, improving heat dissipation efficiency and enhancing the protective performance of the electrical cavity 101. The water-cooled cavity 103 is interconnected with the electrical cavity 101 for water circulation heat exchange; the reactor cavity 102 is cooled by forced air or by independent heat dissipation. In other embodiments, the water-cooled cavity 103 can be arranged on the side (left or right) instead of the top.

[0033] In this embodiment, the cabinet 100 is divided into three independently isolated chambers: an electrical chamber 101, a reactor chamber 102, and a water-cooled chamber 103. The water-cooled chamber 103 is placed at the top and connected to the electrical chamber 101 for water circulation heat exchange. The reactor chamber 102 is independently cooled by forced air or water cooling. This design allows for a reasonable and compact layout of the components within the cabinet, improving space utilization. By using water cooling for the energy storage converter, superior heat dissipation performance is achieved, reaching an IP65 protection rating, making it well-suited for complex outdoor environments with high humidity, high salinity, and dust and pollen. The water-cooled PCS significantly increases power density. Integrating the water cooling system within the converter minimizes the cabinet size, thereby significantly reducing transportation and land costs.

[0034] like Figure 1 and Figure 4 As shown, the electrical cavity 101 contains multiple power modules 1 and an internal circulation heat exchanger 10. Each power module 1 integrates a water-cooled plate and is located above the internal circulation heat exchanger 10. Figure 3 and Figure 4 As shown, the water-cooled cavity 103 is equipped with a water pump 6 and an external circulation heat exchanger 8. The external circulation heat exchanger 8 is connected to an external cold source and is connected to the water-cooled plate of the power module 1 and the internal circulation heat exchanger 10 through an inlet water pipe and an outlet water pipe. The water pump 6 is installed on the inlet water pipe to realize water circulation heat exchange within the electrical cavity 101.

[0035] Specifically, the cooling water circuit between the power module 1 and the internal circulation heat exchanger 10 is configured in parallel. The external circulation heat exchanger 8 is used to cool the coolant in the return water pipe. The cooled liquid enters the inlet water pipe through the water pump 6, and then enters the water-cooled plate of the power module 1 and the internal circulation heat exchanger 10 through four parallel water-cooling branches for heat exchange. The coolant flows into the water-cooled plate through the inlet water pipe to carry away the heat generated by the power module 1, and then enters the return water branch through the outlet of the water-cooled plate. The heated liquid then enters the return water pipe through the return water branch, and the cycle continues. It is understood that, in order to accurately control the water cooling effect, pressure sensors and temperature sensors can be installed on both the inlet and return water pipes to monitor the temperature and pressure of the cooling water in real time.

[0036] like Figure 3 and Figure 4As shown, the water-cooled cavity 103 is also equipped with a water tank 7, which is connected to the external circulation heat exchanger 8 and the inlet pipe for storing and replenishing cooling water. Specifically, when there is too much cooling water in the external circulation heat exchanger 8, it can be discharged into the water tank 7 for storage; when there is insufficient cooling water in the external circulation heat exchanger 8, the cooling water in the water tank 7 can be directly transported to the inlet pipe. To improve the cleanliness of the cooling water, a filter screen is installed at the inlet of the external circulation heat exchanger 8 to remove impurities from the cooling water before it is transported to the power module 1 and the internal circulation heat exchanger 10.

[0037] like Figure 3 and Figure 4 As shown, the water-cooled cavity 103 is also equipped with multiple external circulation fans 9. The front and rear sides of the cabinet 100 are respectively provided with air inlets and air outlets. The external circulation fans 9 are used to draw cold air from outside the cabinet 100 into the water-cooled cavity 103 to dissipate heat and cool the external circulation heat exchanger 8. The air temperature rises after passing through the external circulation heat exchanger 8, and the hot air is finally discharged from the air outlet.

[0038] like Figure 5 As shown, the electrical cavity 101 is also equipped with multiple internal circulation fans 13, which are located between the power module 1 and the internal circulation heat exchanger 10 to drive air circulation within the electrical cavity 101. Besides the power module 1, the heat generated by other components within the electrical cavity 101 is dissipated through the internal circulation heat exchanger 10. Specifically, the inlet of the internal circulation heat exchanger 10 is connected to an inlet pipe, and the outlet is connected to a return pipe, thus realizing the circulation of coolant. Three internal circulation fans 13 are installed above the internal circulation heat exchanger 10 to drive air circulation within the electrical cavity 101, achieving air cooling of the components.

[0039] like Figure 6 As shown, the electrical cavity 101 also includes a capacitor bank 3 and an AC filter capacitor 11. Both the capacitor bank 3 and the AC filter capacitor 11 are located behind the power module 1 and above the internal circulation heat exchanger 10. In this embodiment, the capacitor bank 3 is a DC capacitor bank.

[0040] Furthermore, the electrical cavity 101 is also equipped with a capacitor bank fan 16, which is located above the capacitor bank 3 for air cooling of the capacitor bank 3. To ensure the heat dissipation effect of the capacitor bank 3, two additional axial flow fans are added above the capacitor bank 3 to overcome the internal airflow resistance of the capacitor bank 3.

[0041] like Figure 2 and Figure 6As shown, the electrical cavity 101 is also provided with a DC frame 4 and an AC frame 5. An AC switch 12 is provided on the AC frame 5, and a DC switch 15 is provided on the DC frame 4. Both the AC switch 12 and the DC switch 15 are located behind the reactor 2.

[0042] like Figure 7 As shown, the hot air from the electrical cavity 101 is driven by the internal circulation fan 13 and drawn into the internal circulation heat exchanger 10 for heat exchange and cooling. Then, the cold air is blown upward by the internal circulation fan 13 to the power module 1, and then blown downward by the capacitor bank fan 16 to the capacitor bank 3, AC filter capacitor 11, AC switch 12 and DC switch 15, etc. Finally, it flows back into the internal circulation heat exchanger 10 for cooling, and the cycle continues.

[0043] like Figure 1 and Figure 5 As shown, the reactor cavity 102 is equipped with a reactor 2 and multiple reactor cooling fans 14. The reactor cooling fans 14 are located above the reactor 2 for forced air cooling of the reactor 2.

[0044] like Figure 7 As shown, the reactor cavity 102 has a reactor air inlet on the door panel on the side and a reactor air outlet on the bottom plate of the reactor cavity 102.

[0045] In this embodiment, the reactor 2 experiences significant losses during operation. To avoid overburdening the water-cooling system, the reactor 2 is cooled independently using forced air cooling. Two reactor cooling fans 14 are installed above the reactor 2. The air inlet of the independent ventilation duct is located on the door panel of the reactor cavity 102, and the air outlet is located on the bottom plate of the reactor cavity 102. External cold air is drawn in by the reactor cooling fans 14 and blown downwards towards the reactor 2 for cooling. Hot air is finally discharged from the air outlet.

[0046] In other embodiments, a water-cooled reactor can be used directly, or a water-air heat exchanger can be configured on the reactor for water-cooled heat exchange.

[0047] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A water-cooled energy storage converter, characterized in that, The system includes a cabinet (100), which is divided into an independent electrical cavity (101), a reactor cavity (102), and a water-cooled cavity (103), with the water-cooled cavity (103) located at the top. The water-cooled cavity (103) is connected to the electrical cavity (101) for water circulation heat exchange. The reactor cavity (102) is cooled independently by forced air cooling or water cooling.

2. The water-cooled energy storage converter according to claim 1, characterized in that, The electrical cavity (101) is provided with multiple power modules (1) and an internal circulation heat exchanger (10). The power module (1) has an integrated water-cooled plate inside and is located above the internal circulation heat exchanger (10). The water-cooled cavity (103) is provided with a water pump (6) and an external circulation heat exchanger (8). The external circulation heat exchanger (8) is connected to an external cold source and is connected to the water-cooled plate of the power module (1) and the internal circulation heat exchanger (10) through an inlet pipe and a return pipe. The inlet pipe is provided with a water pump (6) to realize water circulation heat exchange in the electrical cavity (101).

3. The water-cooled energy storage converter according to claim 2, characterized in that, The water-cooled cavity (103) is also provided with a water tank (7), which is connected to the external circulation heat exchanger (8) and the water inlet pipe for storing and replenishing cooling water.

4. The water-cooled energy storage converter according to claim 2, characterized in that, The water-cooled cavity (103) is also equipped with multiple external circulation fans (9). The front and rear sides of the cabinet (100) are respectively provided with air inlets and air outlets. The external circulation fans (9) are used to draw cold air from outside the cabinet (100) into the water-cooled cavity (103) to dissipate heat and cool the external circulation heat exchanger (8).

5. The water-cooled energy storage converter according to claim 2, characterized in that, The electrical cavity (101) is also provided with a plurality of internal circulation fans (13), which are located between the power module (1) and the internal circulation heat exchanger (10) to drive air to circulate inside the electrical cavity (101).

6. The water-cooled energy storage converter according to claim 5, characterized in that, The electrical cavity (101) is also equipped with a capacitor bank (3) and an AC filter capacitor (11). The capacitor bank (3) and the AC filter capacitor (11) are both located behind the power module (1) and above the internal circulation heat exchanger (10).

7. The water-cooled energy storage converter according to claim 6, characterized in that, The electrical cavity (101) is also equipped with a capacitor bank fan (16), which is located above the capacitor bank (3) for air cooling of the capacitor bank (3).

8. The water-cooled energy storage converter according to claim 7, characterized in that, The electrical cavity (101) is also equipped with an AC switch (12) and a DC switch (15), both of which are located behind the reactor (2).

9. The water-cooled energy storage converter according to any one of claims 1 to 8, characterized in that, The reactor cavity (102) is provided with a reactor (2) and a plurality of reactor cooling fans (14). The reactor cooling fans (14) are located above the reactor (2) for forced air cooling of the reactor (2).

10. The water-cooled energy storage converter according to claim 9, characterized in that, The reactor cavity (102) has a reactor air inlet on its side and a reactor air outlet at its bottom.

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