Energy storage converter suitable for being compactly placed in station and heat dissipation method

Abstract

The invention belongs to the field of energy storage converters, and discloses an energy storage converter suitable for being compactly placed in a station, which comprises a converter shell, a first protective electrical assembly, a hollow radiator, a protective cover shell and a heat exchange core body, and is characterized in that the converter shell is provided with an air inlet space, a component space and an air outlet space; the hollow radiator and the protective cover form an air-passing heat dissipation channel which is closed in the circumferential direction, other part spaces except the air-passing heat dissipation channel serve as sub-spaces outside the channel, the first protective electrical assembly is located in the sub-spaces outside the channel, and the converter shell is provided with a first air inlet, a second air inlet and an air outlet. The second air inlet communicates with the air inlet space through a cold side channel of the heat exchange core body, the first air inlet communicates with the air inlet space, the air outlet selectively faces the same direction as the first air inlet and the second air inlet, and the air outlet correspondingly communicates with the air outlet space. The invention further discloses a heat dissipation method of the energy storage converter.

Description

Technical Field

[0001] The present invention belongs to the field of energy storage converters, and particularly relates to an energy storage converter suitable for compact placement in a station and a heat dissipation method. Background Art

[0002] In the scenario of power transmission and distribution, the industry usually refers to a place where multiple electrical equipment supporting the power grid are centrally placed through enclosure facilities as a station. The energy storage converter is one of the electrical equipment therein, which is used to realize the bidirectional conversion of electric energy between the DC power on the battery side and the AC power on the grid side. At the same time, it can also adjust the output voltage, frequency and power in real time to avoid the impact of the fluctuations of new energy power generation on the power grid. With the large-scale development of large new energy bases, the power grid has an urgent need for high-power and high-stability energy storage regulation, and the demand for high-power centralized energy storage converters has increased significantly. As a result, the number of large energy storage converters in the station has a tendency to increase, and the occupied space also has a tendency to increase.

[0003] Currently, since the station is often in an outdoor open environment, when the energy storage converter introduces external air flow due to heat dissipation, dust, sand and rain are likely to enter the energy storage converter through the heat dissipation air duct. And because the protection requirement levels of some components in the energy storage converter (such as the power module IGBT) are extremely high (IP65), therefore, many energy storage converters adopt a partitioned heat dissipation strategy. That is, on the one hand, the electrical components with extremely high protection requirement levels are cooled in a form isolated from the external environment. On the other hand, after filtering the impurities in the external environment, certain specific electrical components are cooled. Based on such a strategy, there are various energy storage converter products suitable for stations on the market. Inside, multiple fans form multiple heat dissipation circuits, and a heat exchange device is provided to exchange heat for the heat dissipation circuit where the components with extremely high protection requirement levels are located.

[0004] However, in actual practice, the defects of the above-mentioned energy storage converter products are becoming more and more difficult to ignore. First, due to the continuous expansion of the number of electrical equipment in the station, the reserved space for heat dissipation near the original energy storage converter products is continuously reduced. That is, the equipment layout in the station is becoming more and more compact, resulting in that the heat dissipation settings of the energy storage converter often interfere with other nearby equipment, or the heat dissipation settings of the energy storage converter are difficult to achieve the expected effect due to the interference of other equipment. Second, the control strategy of the energy storage converter is relatively simple, simply and roughly controlling the thermal management components independently by temperature, without jointly controlling multiple thermal management components, resulting in high energy consumption, high noise of the thermal management system, and reduced lifespan of the thermal management devices. Third, although the energy storage converter has a setting for filtering impurities in the external environment, if the environment is relatively harsh, the effect of this setting will also be insufficient. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an energy storage converter and heat dissipation method suitable for compact placement in power plants. This method ensures good heat dissipation while avoiding interference with nearby equipment and preventing interference with heat dissipation from other equipment, all within the context of a compact power plant layout.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An energy storage converter suitable for compact placement in power stations has a horizontally arranged and vertically extending converter housing, including a first protective electrical unit, a second protective electrical unit, and a heat exchange assembly. The interior of the converter housing has an air inlet space, a component space, and an air outlet space arranged sequentially from top to bottom. Both the first and second protective electrical units are located within the component space. The first protective electrical unit includes a first protective electrical component, and the second protective electrical unit includes a combiner fan, a hollow radiator, a protective cover, and a second protective electrical element disposed within the protective cover. The air inlet space, the hollow radiator, the protective cover, and the air outlet space are sequentially connected vertically, with the hollow radiator and the protective cover forming a circumferentially closed airflow and heat dissipation channel. The converging exhaust fan is located at the end of the airflow cooling channel, and the space of the remaining components outside the airflow cooling channel is regarded as the channel outer subspace. The first protective electrical component is located inside the channel outer subspace. The heat exchange component includes a heat exchange core and a flow guide fan. The heat exchange core has a cold side channel and a hot side channel. The flow guide fan is located inside the channel outer subspace, near the air intake space, and is located at the opening of the hot side channel. The converter housing has a first air inlet, a second air inlet, and an air outlet. The first air inlet and the second air inlet face opposite directions. The second air inlet is connected to the air intake space through the cold side channel. The first air inlet is connected to the air intake space. The air outlet is selectively located in the same direction as the first air inlet and the second air inlet, and the air outlet is connected to the air outlet space.

[0007] Preferably, the present invention further includes a sheet metal assembly, including a top partition, a bottom partition, and a converging air chamber. The top partition and the bottom partition are used to separate an air inlet space, a component space, and an air outlet space inside the converter housing. The converging air chamber is located at the top of the component space, and the air inlet space is connected to the hollow radiator through the converging air chamber. The converging exhaust fan is installed inside the converging air chamber. Furthermore, the sheet metal assembly also includes a return air baffle, which is located below the converging air chamber and spans the hollow radiator, dividing the outer subspace of the channel into adjacent upper and lower return air sub-cavities and heat dissipation sub-cavities. The openings at both ends of the hot side channel are located in the return air sub-cavities and heat dissipation sub-cavities, respectively. The upper end of the hollow radiator passes through the return air baffle, and the edge of the return air baffle is sealed to the surface of the heat exchange core, forming a return air neck with the inner wall of the converter housing. The return air neck and the heat exchange core are located on opposite sides of the hollow radiator, so that the return air sub-cavities and heat dissipation sub-cavities are connected only through the return air neck.

[0008] Furthermore, the sheet metal assembly also includes a flow guide baffle, which is located below the return air baffle and spans the hollow radiator, dividing the heat dissipation sub-cavity into an upper sub-cavity and a lower sub-cavity that are adjacent to each other. The lower end of the hollow radiator passes through the flow guide baffle, and the edge of the flow guide baffle forms an air passage neck with the inner wall of the converter housing, and the air passage neck is located directly below the flow guide fan.

[0009] Furthermore, the present invention also includes an expansion fan disposed on the flow guide plate. The expansion fan is located directly below the return air neck. The flow guide fan is used to generate airflow that passes downward through the return air neck, and the expansion fan is used to generate airflow that directs the airflow in the lower sub-cavity toward the return air neck. Furthermore, the present invention also includes a sensor assembly, a dehumidifier, and a heating tube. The first protective electrical assembly includes a first element. The sensor assembly includes a water immersion sensor, a first temperature and humidity sensor, and a second temperature and humidity sensor. The water immersion sensor is disposed at the second air inlet. The first temperature and humidity sensor is disposed inside the return air sub-cavity. The second temperature and humidity sensor is disposed in the lower sub-cavity and is located near the expansion fan. The dehumidifier is disposed on the inner wall of the channel outer sub-space. The heating tube is integrated inside the heat exchange core.

[0010] Preferably, the present invention further includes an air inlet assembly, including an air inlet cover, a protective mesh plate, water-blocking louvers, and dustproof filter cotton. The air inlet cover is disposed on the second air inlet and has a downward-facing cover opening, so that the second air inlet communicates with the outside through the cover opening. The protective mesh plate, water-blocking louvers, and dustproof filter cotton are all disposed inside the air inlet cover and are sequentially adjacent to each other away from the cover opening.

[0011] Furthermore, there is a pair of air intake components, which are respectively installed on the first air intake and the second air intake, so that the first air intake is connected to the outside through the cover opening.

[0012] A heat dissipation method for an energy storage converter, when the energy storage converter is in standby mode: Based on the comparison between the humidity feedback values ​​from the first and second temperature and humidity sensors and the predetermined standby humidity value, the dehumidifier dehumidifies the outer subspace of the channel. When dehumidifying the outer subspace, the guide fan and the expansion fan start operating. Based on the comparison between the temperature feedback value from the first temperature and humidity sensor and the predetermined standby temperature value, the heating tube heats the interior of the heat exchange core. When heating the interior of the heat exchange core, the guide fan starts operating. Based on the comparison between the temperature feedback value from the first temperature and humidity sensor and the predetermined operating temperature value of the first guide fan, the guide fan starts operating at a low speed. Based on the comparison between the temperature feedback value from the second temperature and humidity sensor and the predetermined operating temperature value of the first expansion fan, the expansion fan starts operating. Based on the comparison between the temperature feedback value from the first temperature and humidity sensor and the predetermined operating temperature value of the auxiliary heat dissipation fan, the converging exhaust fan starts operating.

[0013] Furthermore, when the energy storage converter is in operation: Based on the comparison between the temperature feedback value of the first temperature and humidity sensor and the predetermined operating temperature value of the first airflow guide, or based on the comparison between the temperature feedback value of the second temperature and humidity sensor and the predetermined operating temperature value of the first extended area, the airflow guide fan is started and operated at a low speed, and the extended area fan is started and operated. Based on the comparison between the temperature feedback value of the first temperature and humidity sensor and the predetermined operating temperature value of the second airflow guide, the airflow guide fan is increased to a high speed. Based on the comparison between the temperature feedback value of the first temperature and humidity sensor and the predetermined operating temperature value of the third airflow guide, the converging exhaust fan is started and continues to operate or the speed of the converging exhaust fan is increased. Based on the temperature feedback value of the thermal monitoring module built into the first component and the predetermined starting speed... Based on the comparison of dynamic temperature values, the busbar exhaust fan is started at a slow speed; based on the comparison of the temperature feedback value of the thermal monitoring module of the first element with the predetermined warning temperature value, and the monitoring data of the immersion sensor, the busbar exhaust fan is selectively started at a slow speed and then increased to a medium speed; based on the comparison of the temperature feedback value of the thermal monitoring module of the first element with the predetermined alarm temperature value, and the monitoring data of the immersion sensor, the busbar exhaust fan is selectively started at a medium speed and then increased to a fast speed; if based on the comparison of the temperature feedback value of the thermal monitoring module of the first element with the predetermined danger temperature value, the output power of the energy storage converter is reduced. Compared with the prior art, the beneficial effects of the present invention are: 1. Because the energy storage converter of the present invention, suitable for compact placement in power stations, includes a first protective electrical unit, a second protective electrical unit, and a heat exchange assembly, the converter housing has an air inlet space, a component space, and an air outlet space inside. The first protective electrical unit includes a first protective electrical assembly, and the second protective electrical unit includes a hollow radiator and a protective cover. The hollow radiator and the protective cover form a circumferentially closed airflow cooling channel. The remaining component space outside the airflow cooling channel is designated as the channel outer subspace. The first protective electrical assembly is located inside the channel outer subspace. The heat exchange assembly includes a heat exchange core and a guide fan. The heat exchange core has a cold-side channel. The converter housing has a first air inlet, a second air inlet, and an air outlet. The second air inlet communicates with the air inlet space through the cold-side channel, the first air inlet communicates with the air inlet space, and the air outlet is selectively connected to the first air inlet. The first and second air inlets face the same direction, and the air outlet is connected to the corresponding air outlet space. This ensures that the air inlets and outlets of the energy storage converter are aligned in a straight line, allowing for flexible heat dissipation configurations even in compact site layouts. Simultaneously, the energy storage converter draws air through both inlets, increasing the air inlet area and reducing the air velocity. This prevents impurities and rainwater from easily entering the converter, significantly reducing the need for fans and lowering noise and energy consumption. Furthermore, the greater distance between the inlets and outlets minimizes the risk of hot air backflow within the converter. Therefore, this invention ensures good heat dissipation while avoiding interference with nearby equipment and preventing interference with heat dissipation from other equipment, all within the constraints of a compact site layout.

[0014] 2. Because the sheet metal assembly of the present invention also includes a return air baffle, which is located below the converging air chamber and spans the hollow radiator, dividing the outer subspace of the channel into upper and lower adjacent return air sub-cavities and heat dissipation sub-cavities, and the openings at both ends of the hot-side channel are located in the return air sub-cavities and heat dissipation sub-cavities respectively, the upper end of the hollow radiator passes through the return air baffle, the edge of the return air baffle is sealed to the surface of the heat exchange core, and forms a return air neck with the inner wall of the converter housing, and the return air neck and the heat exchange core are located on opposite sides of the hollow radiator, so that the return air sub-cavities and heat dissipation sub-cavities are connected only through the return air neck. Therefore, the present invention, through the setting of the return air neck and return air sub-cavities, enables the airflow in the outer subspace of the channel to be concentrated from the return air sub-cavities into the hot-side channel, and to exchange heat with the cold-side channel, thereby achieving the heat dissipation effect of the outer subspace of the channel, that is, the outer subspace of the channel, which is basically isolated from the outside, achieves a good heat dissipation effect through the heat exchange core.

[0015] 3. Because the sheet metal assembly of the present invention also includes a flow guide baffle, which is located below the return air baffle and spans the hollow radiator, dividing the heat dissipation sub-cavity into an upper sub-cavity and a lower sub-cavity adjacent to each other, the lower end of the hollow radiator passes through the flow guide baffle, and the edge of the flow guide baffle forms an air passage neck with the inner wall of the converter housing, and the air passage neck is located directly below the flow guide fan, the present invention enables the channel outer sub-space to form two sub-cavities at different distances from the heat exchange core through the flow guide baffle, that is, the two sub-cavities can be equipped with first protective electrical components with different heat generation, thereby realizing a flexible heat dissipation setting with targeted heat dissipation.

[0016] 4. Because the present invention also includes an expansion fan, which is installed on the air guide baffle and located directly below the return air neck, the air guide fan is used to generate airflow downward through the air neck, and the expansion fan is used to guide the airflow in the lower sub-cavity toward the return air neck. When the expansion fan is turned on, due to the effect of the airflow, more cooling airflow will flow through the lower sub-cavity, and the cooling airflow in the lower sub-cavity is positively correlated with the rotational speed of the expansion fan. Therefore, the present invention can further enhance the flexibility of targeted heat dissipation settings by adjusting the cooling airflow in the lower sub-cavity through the expansion fan.

[0017] 5. Because the present invention also includes a sensor assembly, a dehumidifier, and a heating tube, the sensor assembly includes a water immersion sensor, a first temperature and humidity sensor, and a second temperature and humidity sensor. The water immersion sensor is located at the second air inlet, the first temperature and humidity sensor is located inside the return air sub-cavity, the second temperature and humidity sensor is located in the lower sub-cavity and near the expansion fan, the dehumidifier is located on the inner wall of the channel outer sub-space, and the heating tube is integrated inside the heat exchange core. Therefore, the present invention can perform dehumidification and heating operations inside the energy storage converter through the dehumidifier and the heating tube, so that the energy storage converter can operate better. More importantly, through the combined use of the sensor assembly and the thermal monitoring module (NTC) built into the first element (IGBT) with the guide fan, expansion fan, and return exhaust fan, not only can a flexible and targeted heat dissipation method (heat dissipation strategy) be realized, but the fault location can also be determined more quickly through the monitoring terminal.

[0018] 6. Because the present invention also includes an air intake assembly, including an air intake cover, a protective mesh plate, water-blocking louvers, and dustproof filter cotton, the air intake cover is disposed on the second air inlet, and the air intake cover has a downward-facing cover opening, so that the second air inlet communicates with the outside through the cover opening. The protective mesh plate, water-blocking louvers, and dustproof filter cotton are all blocked inside the air intake cover and are sequentially adjacent to each other away from the cover opening. Therefore, the present invention, through the downward-facing open cover opening, makes it difficult for external impurities and rainwater to enter the interior of the energy storage converter against the reverse potential energy, and the three-layer filtration structure inside the protective cover further prevents the entry of external impurities and rainwater.

[0019] 7. Because the number of air intake components in this invention is a pair, respectively disposed on the first air intake and the second air intake, the first air intake is connected to the outside through the cover opening. At this time, the first air intake can be set to be larger. Therefore, by setting the air intake components in pairs, this invention adapts to the enlarged setting of the first air intake, thereby further increasing the area of ​​the air intake interface of the energy storage converter.

[0020] 8. Because the heat dissipation method of the energy storage converter of the present invention is used in the above-mentioned energy storage converter, when the energy storage converter is in standby mode: based on the comparison result of the humidity feedback value of the first temperature and humidity sensor and the second temperature and humidity sensor with the predetermined standby humidity value, the external subspace of the channel is dehumidified by a dehumidifier, and when the external subspace of the channel is dehumidified, the guide fan and the expansion fan start running; based on the comparison result of the temperature feedback value of the first temperature and humidity sensor with the predetermined standby temperature value, the interior of the heat exchange core is heated by a heating tube, and when the interior of the heat exchange core is heated, the guide fan starts running; based on the comparison result of the temperature feedback value of the first temperature and humidity sensor and ... heat exchange core is heated by a heating tube, and when the interior of the heat exchange core is heated, the guide fan starts running; based on the comparison result of the temperature feedback value of the first temperature and humidity sensor and the predetermined standby temperature value, the heat exchange core is heated by a heating tube, and when the interior of the heat exchange core is heated, the heat exchange core starts running; based on the comparison result of the temperature feedback value of the first temperature and humidity sensor and the predetermined standby temperature value, the heat exchange core is heated by a heating tube, and when the interior of the heat exchange core is heated, the heat exchange core starts running; based on the comparison result of the temperature feedback value of the first temperature and humidity sensor and the predetermined standby temperature value, the heat exchange core is heated by a heating tube, and when the interior of the heat exchange core is heated, the heat exchange core is heated; when the interior of the heat exchange core is heated, the heat exchange core is heated; when the heat exchange core is heated, the heat exchange core is heated; when the heat exchange core is heated, the heat exchange core is heated; when the heat exchange core is heated, the heat exchange core Based on the comparison of operating temperature values, the flow guide fan is started to operate at a lower speed. Based on the comparison of the temperature feedback value of the second temperature and humidity sensor with the predetermined operating temperature value of the first extended area, the extended area fan is started to operate. Based on the comparison of the temperature feedback value of the first temperature and humidity sensor with the predetermined operating temperature value of auxiliary heat dissipation, the busbar exhaust fan is started to operate. Therefore, this invention cools the inside of the converter housing by setting up a dehumidifier, integrating a heating tube in the heat exchange core, and cooperating with the flow guide fan and the extended area fan. In particular, under predetermined conditions, the external airflow is introduced by the busbar exhaust fan to assist in cooling the inside, thereby ensuring that the inside of the converter in standby state has a good temperature and humidity.

[0021] 9. According to the heat dissipation method of the energy storage converter of the present invention, when the energy storage converter is in operation: based on the comparison result of the temperature feedback value of the first temperature and humidity sensor and the first predetermined operating temperature value of the guide fan, or based on the comparison result of the temperature feedback value of the second temperature and humidity sensor and the first predetermined operating temperature value of the extended area, the guide fan is started and operated at a low speed, and the extended area fan is started and operated; based on the comparison result of the temperature feedback value of the first temperature and humidity sensor and the second predetermined operating temperature value of the guide fan, the guide fan is increased to a high speed; based on the comparison result of the temperature feedback value of the first temperature and humidity sensor and the third predetermined operating temperature value of the guide fan, the busbar exhaust fan is started and continuously operated or the speed of the busbar exhaust fan is increased; based on the comparison result of the temperature feedback value of the thermal monitoring module of the first element and the predetermined start-up temperature value, the busbar exhaust fan is started and operated at a slow speed; based on the comparison result of the temperature feedback value of the thermal monitoring module of the first element and the predetermined alarm temperature value, and the monitoring data of the immersion sensor, the busbar exhaust fan is selectively operated at a slow speed, and the busbar exhaust fan is increased to a medium speed; based on the comparison result of the temperature feedback value of the thermal monitoring module of the first element and the predetermined alarm temperature value, the busbar exhaust fan is selected to be operated at a slow speed, and the busbar exhaust fan is increased to a medium speed; based on the comparison result of the temperature feedback value of the thermal monitoring module of the first element and the predetermined alarm temperature value, the busbar exhaust fan is started and operated at a low speed, and the speed of the busbar exhaust fan is increased ... Based on the comparison of temperature values ​​and the monitoring data from the immersion sensor, the combiner fan is selected to operate at a medium speed, and then increased to a high speed. If the temperature feedback value from the thermal monitoring module of the first element is compared with the predetermined dangerous temperature value, the output power of the energy storage converter is reduced. Therefore, on the one hand, this invention, under different internal temperature environments of the converter, through the combined application of different speeds of the guide fan, the expansion fan, and the combiner fan corresponding to different preset conditions, can both meet the internal temperature requirements of the converter and provide targeted support for different temperatures. By operating the fan at a low speed, the vibration and noise generated by the fan are reduced, and the associated energy consumption is significantly decreased. On the other hand, the present invention also uses the data collected by the thermal monitoring module (NTC) of the first element (IGBT) and the monitoring data of the water immersion sensor as conditions for targeted adjustment of the fan speed, thereby making the heat dissipation more targeted at different temperatures. That is, when the water immersion sensor detects water, it means that in the case of extreme rainy weather, the rain cover can no longer completely prevent rainwater from entering the air duct. At this time, the present invention will maintain a low wind speed, thereby reducing the air intake wind speed and reducing the intake of rainwater. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an energy storage converter suitable for compact placement in a power station, according to Embodiment 1 of the present invention. Figure 1 .

[0023] Figure 2 This is a schematic diagram of an energy storage converter suitable for compact placement in a power station, according to Embodiment 1 of the present invention. Figure 2 .

[0024] Figure 3This is a three-dimensional schematic diagram of the internal structure of an energy storage converter suitable for compact placement in a power station, according to Embodiment 1 of the present invention. Figure 1 (Sketches of the first protective electrical unit).

[0025] Figure 4 This is a three-dimensional schematic diagram of the internal structure of an energy storage converter suitable for compact placement in a power station, according to Embodiment 1 of the present invention. Figure 2 .

[0026] Figure 5 This is a three-dimensional schematic diagram of the internal structure of an energy storage converter suitable for compact placement in a power station, according to Embodiment 1 of the present invention. Figure 3 .

[0027] Figure 6 This is a plan view of the internal structure of an energy storage converter suitable for compact placement in a power station, according to Embodiment 1 of the present invention. Figure 3 .

[0028] Figure 7 This is a schematic diagram of the air intake assembly according to Embodiment 1 of the present invention.

[0029] Figure 8 This is a three-dimensional schematic diagram of the structure of the air intake assembly according to Embodiment 1 of the present invention.

[0030] Figure 9 This is a plan view of the air intake assembly according to Embodiment 1 of the present invention.

[0031] Figure 10 This is a plan view of the louver blades according to Embodiment 1 of the present invention.

[0032] Figure 11 This is a schematic diagram of the assembly of the hollow heat sink and the first component according to Embodiment 1 of the present invention.

[0033] Figure 12 This is a plan view of the louver blades according to Embodiment 2 of the present invention.

[0034] Figure 13 This is a partial perspective view of an energy storage converter suitable for compact placement in a power station, according to Embodiment 3 of the present invention.

[0035] In the diagram: 100, Energy storage converter suitable for compact placement in the station; 10, Converter housing; 11, First air inlet; 12, Second air inlet; 13, Air outlet; 14A, Air inlet space; 14B, Air inlet space; 15, Component space; 151, Channel external sub-space; 1511, Return air sub-cavity; 1512, Heat dissipation sub-cavity; 1512u, Upper sub-cavity; 1512d, Lower sub-cavity; 1512a, Return air neck; 1512b, Exhaust air neck; 20, Air inlet assembly; 21, Air inlet cover; 21a, Cover opening; 22, Protective mesh plate; 23, Water-blocking louvers; 231A, Louver blades; 231B, Louver blades; 24, Dustproof filter cotton; 30, Sheet metal assembly; 31, Top. 32. Partition, Return air partition, 33. Airflow guide partition, 34. Bottom partition, 35. Converging air chamber, 40. First protective electrical unit, 41. First protective electrical assembly, 411. First element, 412. Second element, 413. Third element, 50. Second protective electrical unit, 51. Converging exhaust fan, 52. Hollow radiator, 53. Protective cover, 54. Second protective electrical component, 60. Heat exchange assembly, 61A. Heat exchange core, 61B. Heat exchange core, D1. First flow direction, D2. Second flow direction, 62. Airflow guide fan, 70. Expansion fan, 80. Sensor assembly, 81. Immersion sensor, 82. First temperature and humidity sensor, 83. Second temperature and humidity sensor, 90. Dehumidifier. Detailed Implementation

[0036] To make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the energy storage converter and heat dissipation method of the present invention suitable for compact placement in power stations. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0037] <Example 1> like Figures 1 to 6 As shown, the energy storage converter 100 suitable for compact placement in a field station in this embodiment includes a converter housing 10, an air intake assembly 20, a sheet metal assembly 30, a first protective electrical unit 40, a second protective electrical unit 50, a heat exchange assembly 60, an expansion fan 70, a sensor assembly 80, a dehumidifier 90, and a heating element (not shown in the figure).

[0038] The inverter housing 10 is horizontally arranged and vertically extended. Its surface has a first air inlet 11, a second air inlet 12, and an air outlet 13. The first air inlet 11 and the second air inlet 12 face away from each other, and the air outlet 13 is optionally aligned with the first air inlet 11 and the second air inlet 12. Specifically, the inverter housing 10 has a rectangular outer contour. The first air inlet 11 and the second air inlet 12 are located on opposite sides of the inverter housing 10. The air outlet 13 is optionally coplanar with the first air inlet 11 and the second air inlet 12. Thus, the first air inlet 11, the second air inlet 12, and the air outlet 13 are all aligned on the same straight line. The first air inlet 11 and the second air inlet 12 are both located in the top region of the inverter housing 10, and the air outlet 13 is located in the bottom region of the inverter housing 10.

[0039] like Figures 7 to 9 As shown, the air intake assembly 20 includes an air intake cover 21, a protective mesh plate 22, a water-blocking louver 23, and a dustproof filter cotton 24.

[0040] The air inlet cover 21 is disposed on the second air inlet 12. The air inlet cover 21 is in the shape of an inverted dish and has a downward-facing cover opening 21a. Thus, the second air inlet 12 is connected to the outside through the cover opening 21a. That is, the external airflow can only enter the second air inlet 12 and enter the interior of the converter housing 10 by flowing upward in the opposite direction.

[0041] The protective mesh 22, the water-blocking louvers 23, and the dustproof filter cotton 24 are all installed inside the air inlet cover 21 and are arranged sequentially and adjacently away from the cover opening 21a. In this embodiment, the protective mesh 22 has a mesh size of 10.

[0042] like Figure 10 As shown, the water-blocking louver 23 has multiple louver blades 231A distributed horizontally. The louver blades 231A are "S" shaped and bent at right angles. The three continuous segments of the louver blades 231A all extend downwards at an angle. Specifically, when the external airflow carries rainwater into the water-blocking louver 23, the external airflow flows in a tortuous manner. During this process, the rainwater hits the surface of the louver blades 231A and flows outwards along the surface of the louver blades 231A under the action of gravitational potential energy.

[0043] The sheet metal assembly 30 includes a top partition 31, a return air partition 32, a flow guide partition 33, a bottom partition 34, and a converging air chamber 35.

[0044] The top partition 31 and the bottom partition 34 divide the inside of the inverter housing 10 into an air inlet space 14A, a component space 15, and an air outlet space (not shown in the attached figure) that are sequentially adjacent from top to bottom. The converging air chamber 35 is located at the top of the component space 15, and the first air inlet 11 and the second air inlet 12 are both connected to the air inlet space 14A. The air outlet 13 is connected to the air outlet space. The converging air chamber 35, the first protective electrical unit 40, the second protective electrical unit 50, the heat exchange component 60, the expansion fan 70, the sensor component 80, and the dehumidifier 90 are all located inside the component space 15. Specifically, the first air inlet 11 is directly connected to the air inlet space 14A. The converging air chamber 35 is a hollow sheet metal structure with openings at the top and bottom. It is adjacent to the top partition 31, with the upper end connected to the air inlet space 14A and the lower end open to the component space 15. In this embodiment, the converging air chamber 35 is a hollow rectangle, and the top partition 31 and the bottom partition 34 are parallel partitions.

[0045] The return air baffle 32 and the flow guide baffle 33 are both located between the lower surface of the confluence air chamber 35 and the bottom baffle 34. The return air baffle 32 is closer to the lower surface of the confluence air chamber 35 than the flow guide baffle 33. The return air baffle 32 and the flow guide baffle 33 form air passage necks 1512a and 1512b with the opposite side walls of the converter housing 10, respectively. The return air baffle 32 and the lower surface of the confluence air chamber 35 form a return air sub-cavity 1511 in the upper part of the component space 15.

[0046] Both the second protective electrical unit 50 and the first protective electrical unit 40 are located inside the component space 14A. Specifically, both the second protective electrical unit 50 and the first protective electrical unit 40 are located between the return air baffle 32 and the bottom baffle 24.

[0047] The second protective electrical unit 50 includes a busbar exhaust fan 51, a hollow radiator 52, a protective housing 53, and a second protective electrical component 54 disposed within the protective housing 53.

[0048] The air inlet space 14A, the converging air chamber 35, the hollow radiator 52, the protective cover 53, and the air outlet space are connected vertically in sequence. The air inlet space 15 is connected to the hollow radiator 52 through the converging air chamber 35. Thus, the converging air chamber 35, the hollow radiator 52, and the protective cover 53 are connected in sequence to form a circumferentially closed airflow cooling channel (not shown in the attached figure). The converging exhaust fan 51 is located inside the converging air chamber 35 at the end of the airflow cooling channel, and dissipates the exhaust fan from the remaining airflow cooling channel. The space 15 serves as the outer subspace 151 of the channel. The return air baffle 32 divides the outer subspace 151 of the channel into an upper and lower adjacent return air sub-cavity 1511 and a heat dissipation sub-cavity 1512. The return air sub-cavity 1511 and the heat dissipation sub-cavity 1512 are connected only through the return air neck 1512a. The flow guide baffle 33 divides the heat dissipation sub-cavity 1512 into an upper sub-cavity 1512u and a lower sub-cavity 1512d, which are connected only through the air passage neck 1512b.

[0049] Specifically, the converging exhaust fan 51 has three speed levels after starting: slow speed, medium speed and fast speed. The airflow cooling channel and the external subspace 151 are completely isolated within the component space 15. There are multiple hollow radiators 52 that are parallel to each other, and multiple radiator gaps are formed between adjacent hollow radiators 52. The bottom surface of the converging air chamber 35 has multiple lower openings that are connected to the hollow radiators 52.

[0050] The return air baffle 32 spans the upper end of the hollow radiator 52, and the flow guide baffle 33 spans the upper end of the hollow radiator, thus the return air sub-cavity 1511 has a portion of multiple radiator spacing.

[0051] In this embodiment, the hollow radiator 52 is a hollow and vertically extending rectangular cylinder with multiple heat dissipation fins (not shown in the figure) formed inside, and the protective cover 53 is a hollow and vertically extending rectangular cylinder.

[0052] The first protective electrical unit 40 includes a first protective electrical component 41, which is located inside the outer subspace of the channel.

[0053] The first protective electrical assembly 41 includes a first element 411, a second element 412, and a third element 413.

[0054] The first element 411 and the second element 412 are both disposed inside the upper sub-cavity 1512u, such as Figure 11As shown, the first element 411 is disposed on the outer surface of the hollow heat sink 52, and the third element 413 is disposed inside the lower sub-cavity 1512d. Specifically, the first element 411 consists of multiple IGBTs and has a built-in thermal monitoring module (NTC). The number of second elements 412 is at least one, disposed on the flow guide baffle 33 and located near the air passage neck 1512b. The number of third elements 413 is at least two, disposed on the bottom baffle 34 and located opposite each other on the protective cover 53. On both sides, the third element 413 located on one side of the protective housing 53 is close to the air passage neck 1512b, and the outer peripheral surface of the protective housing 53 forms at least two flow gaps with the inner wall of the converter housing 10, so that the two ends of the flow gaps are open to the third element 413 located on opposite sides of the protective housing 53, and the extension direction of the heat sink gap is parallel to the extension direction of the flow gap. The return air neck 1512a and the air passage neck 1512b are located on opposite sides of the channel outer subspace 151 along the extension direction.

[0055] The heat exchange assembly 60 includes a heat exchange core 61A and a flow guide fan 62.

[0056] The heat exchange core 61A has a cold-side channel (not shown in the attached figure) and a hot-side channel (not shown in the attached figure). The flow guide fan 62 is located inside the outer sub-space 151 of the channel, near the air inlet space 14A, and is located at the opening of the hot-side channel. The second air inlet 12 is connected to the air inlet space 14A through the cold-side channel. Specifically, the heat exchange core 61A is a counter-flow air channel. The two openings of the hot-side channel are located in the return air sub-cavity 1511 and the heat dissipation sub-cavity 1512, respectively. The opening of the hot-side channel in the heat dissipation sub-cavity 1512 is vertically facing the air neck 1512b. The cold-side channel is completely located inside the upper sub-cavity 1512u. The two openings are open to the outside through the first air inlet 11 and connected to the air inlet space 14A through the opening on the top partition 31, respectively.

[0057] Specifically, the cold side channel extends in a tortuous manner along the first flow direction D1, and the hot side channel extends in a tortuous manner along the second flow direction D2, so that both the cold side channel and the hot side channel extend in an "L" shape, and the free end of the cold side channel is vertically downward, so that external impurities and rainwater cannot flow back through the cold side channel into the air intake space 14A. The guide fan 62 has two speeds after starting: low speed and high speed.

[0058] The air passage 1512b is located directly below the air guide fan 62. The air guide fan 62 is used to generate airflow downward through the air passage 1512b. The edge of the return air baffle 32 is sealed to the peripheral surface of the lower end of the heat exchange core 61. The return air passage 1512a and the heat exchange core 61 are located on opposite sides of the hollow radiator 52. Specifically, the airflow drawn out by the air guide fan 62 from the cold side channel is divided into two paths. The first path flows through the radiator interval in the upper sub-cavity 1512u to the return air passage 1512a. The second path flows through the air passage 1512b into the lower sub-cavity 1512u.

[0059] An expansion fan 70 is mounted on the flow guide baffle 33 and is located directly below the return air neck 1512a. The expansion fan 70 generates an upward airflow toward the return air neck 1512a. Specifically, the expansion fan 70 has a rotational speed after startup. The airflow flowing into the lower sub-cavity 1512u is blown toward the side where the expansion fan 70 is located through the flow gap. Then, the airflow is blown toward the return air neck 1512a through the guide of the expansion fan 70. The switching state of the expansion fan 70 directly causes a change in the air pressure on the corresponding upper sub-cavity 1512a side, thereby causing a change in the airflow of the first and second paths. That is, when the expansion fan 70 starts from a standstill, the airflow of the first path decreases significantly, and the airflow of the second path increases significantly; when the expansion fan 70 stops from a standstill, the airflow of the first path increases significantly, and the airflow of the second path decreases significantly.

[0060] The sensor assembly 80 includes a water immersion sensor 81, a first temperature and humidity sensor 82, and a second temperature and humidity sensor 83.

[0061] A water immersion sensor 82 is installed at the second air inlet 12 to monitor the water vapor immersion situation at the second air inlet 12. A first temperature and humidity sensor 82 is installed inside the return air sub-cavity 1511. A second temperature and humidity sensor 83 is installed in the lower sub-cavity 1512d and is located near the expansion fan 70. Specifically, the water immersion sensor 82 is a photoelectric water immersion sensor, and both the first temperature and humidity sensor 82 and the second temperature and humidity sensor 83 are installed on the inner wall of the solid.

[0062] The dehumidifier 90 is installed on the inner wall of the outer subspace 151 of the channel, and the heating tube is integrated inside the heat exchange core 61A.

[0063] A heat dissipation method (heat dissipation strategy) for an energy storage converter, used in the above-mentioned energy storage converter 100 suitable for compact placement in a power station.

[0064] Specifically, the energy storage converter 100 has two states: standby state and operating state. In the standby state, there is no heat in the air cooling channel and there is a small amount of heat in the outer subspace 151. In the operating state, there is operating heat in the air cooling channel and the outer subspace 151 due to the first protective electrical unit 40 and the second protective electrical unit 50.

[0065] When the energy storage converter 100 is in standby mode: Based on the comparison between the humidity feedback values ​​of the first temperature and humidity sensor 82 and the second temperature and humidity sensor 83 and the predetermined standby humidity value, the dehumidifier 90 dehumidifies the outer subspace 151 of the channel. When dehumidifying the outer subspace 151 of the channel, the guide fan 62 and the expansion fan 70 start running. Specifically, when the humidity feedback values ​​of the first temperature and humidity sensor 82 and the second temperature and humidity sensor 83 are greater than the predetermined standby humidity value, the dehumidifier 90 needs to dehumidify the outer subspace 151 of the channel. However, since the output power of the dehumidifier 90 is limited, in order to better dehumidify the outer subspace 151 of the channel, the guide fan 62 and the expansion fan 70 are started at the same time, and the guide fan 62 is run at a low speed so that the dehumidification effect of the dehumidifier 90 can cover the entire outer subspace 151 of the channel, until the humidity feedback values ​​of the first temperature and humidity sensor 82 and the second temperature and humidity sensor 83 are both less than the predetermined standby humidity value, and the guide fan 62 and the expansion fan 70 are turned off.

[0066] Based on the comparison between the temperature feedback value of the first temperature and humidity sensor 82 and the predetermined standby temperature value, the interior of the heat exchange core 61 is heated by the heating tube. When the interior of the heat exchange core 61 is heated, the guide fan 62 starts running. Specifically, when the temperature feedback value of the first temperature and humidity sensor 82 is less than the predetermined standby temperature value, the outer subspace 151 of the channel needs to be heated by the heating tube. In order to enable the heating effect of the heating tube to quickly cover the entire upper subcavity 1512u, the guide fan 62 is operated at a reduced speed until the temperature feedback value of the first temperature and humidity sensor 82 is less than the predetermined standby temperature value, and at the same time the guide fan 62 and the heater are turned off.

[0067] Based on the comparison between the temperature feedback value of the first temperature and humidity sensor 82 and the predetermined operating temperature value of the first airflow guide, the airflow guide fan 62 is started at a lower speed. Based on the comparison between the temperature feedback value of the second temperature and humidity sensor 83 and the predetermined operating temperature value of the first expansion area, the expansion area fan 70 is started. Based on the comparison between the temperature feedback value of the first temperature and humidity sensor 82 and the predetermined operating temperature value of the auxiliary heat dissipation, the converging exhaust fan 51 is started. Specifically, when the temperature feedback value of the first temperature and humidity sensor 82 is greater than the predetermined operating temperature value of the first airflow guide, the airflow guide fan 62 is started at a lower speed; when the temperature feedback value of the first temperature and humidity sensor 82 is less than the predetermined operating temperature value of the first airflow guide, the airflow guide fan 62 is started at a lower speed. When the temperature reaches the set value, the airflow fan 62 is turned off; when the temperature feedback value of the second temperature and humidity sensor 83 is greater than the predetermined operating temperature value of the first extended area, the extended area fan 70 is started; when the temperature feedback value of the second temperature and humidity sensor 83 is less than the predetermined operating temperature value of the first extended area, the extended area fan 70 is turned off; if the above cooling fails, that is, when the temperature feedback value of the first temperature and humidity sensor 82 is greater than the predetermined operating temperature value of the auxiliary heat dissipation, the converging exhaust fan 51 is started. Its function is to introduce airflow from the outside through the first air inlet 11 and the second air inlet 12, and to perform additional auxiliary heat exchange on the outer subspace 151 of the channel through the heat exchange core 61 coupled with the second air inlet 12 to facilitate cooling.

[0068] When the energy storage converter 100 is in operation: The flow guide fan 62 and the expansion fan 70 are both started and stopped cyclically at a predetermined cycle. If the flow guide fan 62 and / or the expansion fan 70 do not start within the corresponding predetermined cycle, the flow guide fan 62 and the expansion fan 70 are forced to start simultaneously and run continuously. Specifically, when the energy storage converter 100 is in operation and the flow guide fan 62 and the expansion fan 70 are turned off, local heat accumulation may occur in the outer subspace 151 of the channel. As a result, the heat cannot be detected in time by the first temperature and humidity sensor 82 and the second temperature and humidity sensor 83, causing the detection of the first temperature and humidity sensor 82 and the second temperature and humidity sensor 83 to fail due to lag. In order to avoid this phenomenon, the flow guide fan 62 and the expansion fan 70 are both started and stopped cyclically at a predetermined cycle, and neither of them can be kept in a turned-off state for a long time.

[0069] Based on the comparison result of the temperature feedback value of the first temperature and humidity sensor 82 and the first predetermined operating temperature value of the flow guide, or based on the comparison result of the temperature feedback value of the second temperature and humidity sensor 83 and the first predetermined operating temperature value of the expansion area, the flow guide fan 62 is started and operated at a low speed, and the expansion area fan 70 is started and operated. Based on the comparison result of the temperature feedback value of the first temperature and humidity sensor 82 and the second predetermined operating temperature value of the flow guide, the flow guide fan 62 is increased to a high speed. Based on the comparison result of the temperature feedback value of the first temperature and humidity sensor 82 and the third predetermined operating temperature value of the flow guide, the converging exhaust fan 51 is started and continues to operate, or the speed of the converging exhaust fan 51 is increased. Specifically, the first predetermined operating temperature value of the expansion area is less than the second predetermined operating temperature value of the flow guide, and the second predetermined operating temperature value of the flow guide is less than the third predetermined operating temperature value of the flow guide. When the temperature feedback value of the first temperature and humidity sensor 82 is greater than the first predetermined operating temperature value of the flow guide, or the temperature feedback value of the second temperature and humidity sensor 83 is greater than the first predetermined operating temperature value of the expansion area, heat is dissipated through the flow guide fan 62 and the expansion area fan 70 until the first temperature and humidity sensor... If the temperature feedback value of the first temperature and humidity sensor 82 is less than the first predetermined operating temperature value of the flow guide, or if the temperature feedback value of the second temperature and humidity sensor 83 is less than the first predetermined operating temperature value of the extended domain, subsequent judgments are made based on the feedback data of the thermal monitoring module (NTC) built into the first element 411 (IGBT). If the temperature feedback value of the first temperature and humidity sensor 82 is greater than the second predetermined operating temperature value of the flow guide, the flow guide fan 62 is increased to a high speed to enhance heat dissipation. If the temperature feedback value of the first temperature and humidity sensor 82 is lower than the second predetermined operating temperature value of the flow guide, subsequent judgments are made based on the feedback data of the thermal monitoring module (NTC) built into the first element 411 (IGBT). If the temperature feedback value of the first temperature and humidity sensor 82 is greater than the third predetermined operating temperature value of the flow guide, at this time, if the combined exhaust fan 51 is not turned on, the combined exhaust fan 51 is run at a low speed. If the combined exhaust fan 51 is turned on, subsequent judgments are made based on the feedback data of the thermal monitoring module (NTC) built into the first element 411 (IGBT).

[0070] Based on the comparison between the temperature feedback value of the thermal monitoring module built into the first element 411 (IGBT) and the predetermined start-up temperature value, the busbar exhaust fan 51 is started and operated at a slow speed; based on the comparison between the temperature feedback value of the thermal monitoring module built into the first element 411 (IGBT) and the predetermined alarm temperature value, and the monitoring data of the immersion sensor 81, the busbar exhaust fan 51 is selectively operated at a slow speed, and then the busbar exhaust fan 51 is increased to a medium speed; based on the comparison between the temperature feedback value of the thermal monitoring module built into the first element 411 (IGBT) and the predetermined alarm temperature value, and the monitoring data of the immersion sensor 81, the busbar exhaust fan 51 is started and .... Based on the measured data, select a location to run the busbar exhaust fan 51 at a medium speed, and increase the busbar exhaust fan 51 to a high speed; if the temperature feedback value of the thermal monitoring module built into the first element 411 (IGBT) is compared with the predetermined danger temperature value, reduce the output power of the energy storage converter 100. Specifically, the predetermined start-up temperature value is less than the predetermined warning temperature value, the predetermined warning temperature value is less than the predetermined alarm temperature value, and the predetermined alarm temperature value is less than the predetermined danger temperature value. The above content is the specific content of the subsequent judgment based on the feedback data of the thermal monitoring module (NTC) built into the first element 411 (IGBT).

[0071] <Example 2> In this second embodiment, the same symbols are used for the same structures as in the first embodiment, and the same descriptions are omitted.

[0072] In Embodiment 2, the energy storage converter 100 suitable for compact placement in power stations differs from that in Embodiment 1 in that: like Figure 12 As shown, the louver blade 231B is "W" shaped and bent at a right angle. All four continuous segments of the louver blade 231B extend downward at an angle, thus having a better water-blocking effect than the louver blade 231A.

[0073] <Example 3> In this third embodiment, the same symbols are used for the same structures as in the first embodiment, and the same descriptions are omitted.

[0074] In Embodiment 3, the energy storage converter 100 suitable for compact placement in a power station differs from that in Embodiment 1 in that: like Figure 13 As shown, there is a pair of air inlet assemblies 20, which are respectively disposed on the first air inlet 11 and the second air inlet 12. The first air inlet 11 is connected to the outside through the cover opening 21a. Specifically, the second air inlet 12 is connected to the cold side channel. The two air inlet assemblies 20 are symmetrically disposed on the opposite outer surfaces of the inverter housing 10 in the horizontal direction.

[0075] Specifically, a portion of the heat exchange core 61B is adjacent to the air inlet space 14B in the horizontal direction, and the heat exchange core 61B communicates with the air inlet space 14B in the horizontal direction through a straight-extending cold-side channel, while the upper sub-cavity 1512u communicates with the air inlet space 14B through an L-shaped extending hot-side channel.

[0076] Specifically, this embodiment sets up a pair of symmetrical air intake components 20. On the one hand, the air intake cover 21 prevents external impurities and rainwater from entering the air intake space 14B through the second air intake 12. On the other hand, since the coverage area of ​​the air intake cover 21 is large, the second air intake 12 can be designed to be larger and have stronger heat dissipation capacity. Moreover, after the air intake area is increased, the wind speed at the first air intake 11 and the second air intake 12 is reduced, further enhancing the effect of blocking external impurities and rainwater from entering.

[0077] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.

Claims

1. An energy storage converter suitable for compact placement in power stations, comprising a horizontally arranged and vertically extending converter housing, characterized in that, include: The first protective electrical unit, the second protective electrical unit, and the heat exchange components. The interior of the converter housing has, from top to bottom, an air inlet space, a component space, and an air outlet space, which are adjacent to each other. Both the first protective electrical unit and the second protective electrical unit are located inside the component space. The first protective electrical unit includes a first protective electrical component, and the second protective electrical unit includes a converging exhaust fan, a hollow radiator, a protective housing, and a second protective electrical element disposed within the protective housing. The air inlet space, the hollow radiator, the protective housing, and the air outlet space are sequentially connected in the vertical direction. The hollow radiator and the protective housing form a circumferentially closed airflow cooling channel. The converging exhaust fan is disposed at the end of the airflow cooling channel. The space of the remaining components outside the airflow cooling channel is designated as the channel outer subspace. The first protective electrical component is located inside the channel outer subspace. The heat exchange assembly includes a heat exchange core and a flow guide fan. The heat exchange core has a cold-side channel and a hot-side channel. The flow guide fan is located inside the outer subspace of the channels, near the air inlet space, and at the opening of the hot-side channel. The inverter housing has a first air inlet, a second air inlet, and an air outlet. The first air inlet and the second air inlet face opposite directions. The second air inlet is connected to the air intake space through the cold side channel. The first air inlet is connected to the air intake space. The air outlet is selectively oriented in the same direction as the first air inlet and the second air inlet, and the air outlet is connected to the air outlet space.

2. The energy storage converter suitable for compact placement in power stations according to claim 1, characterized in that, Also includes: Sheet metal components, including top partition, bottom partition, and air duct. The top partition and the bottom partition are used to separate the air inlet space, the component space and the air outlet space inside the converter housing. The converging air chamber is located at the top of the component space, and the air inlet space is connected to the hollow radiator through the converging air chamber. The converging exhaust fan is arranged inside the converging air chamber.

3. The energy storage converter suitable for compact placement in power stations according to claim 2, characterized in that: in, The sheet metal assembly also includes a return air baffle, which is located below the converging air chamber and spans the hollow radiator, dividing the outer subspace of the channel into an adjacent upper and lower return air sub-cavity and a heat dissipation sub-cavity, with the two end openings of the hot-side channel located in the return air sub-cavity and the heat dissipation sub-cavity, respectively. The upper end of the hollow radiator passes through the return air baffle, the edge of which is sealed to the surface of the heat exchange core and forms a return air neck with the inner wall of the converter housing. The return air neck and the heat exchange core are located on opposite sides of the hollow radiator, so that the return air sub-cavity and the radiator sub-cavity are connected only through the return air neck.

4. The energy storage converter suitable for compact placement in power stations according to claim 2 or 3, characterized in that: in, The sheet metal assembly also includes a flow guide baffle, which is located below the return air baffle and spans the hollow radiator, dividing the heat dissipation sub-cavity into an upper sub-cavity and a lower sub-cavity that are adjacent to each other. The lower end of the hollow radiator passes through the flow guide baffle, the edge of which forms an air passage neck with the inner wall of the converter housing, and the air passage neck is located directly below the flow guide fan.

5. The energy storage converter suitable for compact placement in power stations according to claim 4, characterized in that, Also includes: An expansion fan is disposed on the air guide baffle and is located directly below the return air neck. The air guide fan is used to generate airflow downward through the air neck and to guide the airflow in the lower sub-cavity toward the return air neck.

6. The energy storage converter suitable for compact placement in power stations according to claim 5, characterized in that, Also includes: Sensor components, dehumidifier, and heating element, The first protective electrical assembly includes a first element. The sensor assembly includes a water immersion sensor, a first temperature and humidity sensor, and a second temperature and humidity sensor. The water immersion sensor is located at the second air inlet, the first temperature and humidity sensor is located inside the return air sub-cavity, and the second temperature and humidity sensor is located in the lower sub-cavity and near the expansion fan. The dehumidifier is installed on the inner wall of the outer subspace of the channel, and the heating tube is integrated inside the heat exchange core.

7. The energy storage converter suitable for compact placement in power stations according to claim 1, characterized in that, Also includes: The air intake assembly includes an air intake cover, a protective mesh panel, water-resistant louvers, and dustproof filter cotton. The air inlet cover is disposed on the second air inlet, and the air inlet cover has a downward-facing opening, thereby allowing the second air inlet to communicate with the outside through the opening. The protective mesh, water-blocking louvers, and dustproof filter cotton are all installed inside the air inlet cover and are arranged sequentially and adjacently away from the opening of the cover.

8. The energy storage converter suitable for compact placement in power stations according to claim 7, characterized in that: in, The number of air inlet components is one pair, which are respectively arranged on the first air inlet and the second air inlet, so that the first air inlet is connected to the outside through the opening of the cover.

9. A heat dissipation method for an energy storage converter, characterized in that: When the energy storage converter is in standby mode: Based on the comparison results of the humidity feedback values ​​of the first temperature and humidity sensor and the second temperature and humidity sensor with the predetermined standby humidity value, the dehumidifier dehumidifies the subspace outside the channel. When the subspace outside the channel is dehumidified, the guide fan and the expansion fan start running. Based on the comparison result between the temperature feedback value of the first temperature and humidity sensor and the predetermined standby temperature value, the interior of the heat exchange core is heated by the heating tube. When the interior of the heat exchange core is heated, the guide fan starts to run. Based on the comparison result between the temperature feedback value of the first temperature and humidity sensor and the predetermined operating temperature value of the first airflow guide, the airflow guide fan is started to operate at a lower speed. Based on the comparison result between the temperature feedback value of the second temperature and humidity sensor and the predetermined operating temperature value of the first expansion area, the expansion area fan is started to operate. Based on the comparison result between the temperature feedback value of the first temperature and humidity sensor and the predetermined operating temperature value of the auxiliary heat dissipation, the converging exhaust fan is started to operate.

10. The energy storage converter suitable for compact placement in power stations according to claim 9, characterized in that: When the energy storage converter is in operation: Based on the comparison result of the temperature feedback value of the first temperature and humidity sensor and the first predetermined operating temperature value of the flow guide, or based on the comparison result of the temperature feedback value of the second temperature and humidity sensor and the first predetermined operating temperature value of the extended area, the flow guide fan is started and operated at the lower speed, and the extended area fan is started and operated. Based on the comparison result of the temperature feedback value of the first temperature and humidity sensor and the second predetermined operating temperature value of the flow guide, the flow guide fan is increased to a high speed. Based on the comparison result of the temperature feedback value of the first temperature and humidity sensor and the third predetermined operating temperature value of the flow guide, the converging exhaust fan is started and continues to operate or the speed of the converging exhaust fan is increased. Based on the comparison result between the temperature feedback value of the thermal monitoring module of the first element and the predetermined start-up temperature value, the busbar exhaust fan is started and operated at a slow speed. Based on the comparison result of the temperature feedback value of the thermal monitoring module of the first element and the predetermined warning temperature value, and the monitoring data of the immersion sensor, the busbar exhaust fan is selectively operated at the slow speed to increase the busbar exhaust fan speed to medium speed; based on the comparison result of the temperature feedback value of the thermal monitoring module of the first element and the predetermined alarm temperature value, and the monitoring data of the immersion sensor, the busbar exhaust fan is selectively operated at the medium speed to increase the busbar exhaust fan speed to high speed; if based on the comparison result of the temperature feedback value of the thermal monitoring module of the first element and the predetermined danger temperature value, the output power of the energy storage converter is reduced.

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