Liquid-cooled energy storage converter

Abstract

The utility model relates to energy storage converter technical field discloses a liquid cooling energy storage converter, through with inverter power device, power inductance and heat exchanger coplanar arrangement on the liquid cooling board, form single -layer planar design, and with first fan, second fan, third fan, fourth fan constitute closed circulating cooling circuit, thereby greatly reduced the height of module, make can significantly reduce the occupation to container internal height space, can satisfy the heat dissipation demand again, simultaneously, still make two liquid cooling energy storage converters can be installed in the container up and down stacking, the outlet of module is more convenient, system layout is more reasonable and compact, improves system power density and integration, simplifies the wiring and assembly process, strengthens the overall performance and reliability of energy storage AC / DC integrated machine.

Description

Technical Field

[0001] This utility model relates to the field of energy storage converter technology, and in particular to a liquid-cooled energy storage converter. Background Technology

[0002] With the rapid development and iteration of technology in the field of energy storage system products, integrated AC / DC energy storage units have stood out in the energy storage market due to their many significant advantages such as high power density, excellent integration and low cost, and are gradually becoming an emerging product form of string energy storage systems.

[0003] The design concept of the integrated AC / DC energy storage unit is to achieve a scientific and rational layout within a standard shipping container. Specifically, the upper area of ​​the container is used to house the battery modules (PACK), while the lower bottom is used to house the energy storage converter (PCS). Through this layout, the entire container can achieve megawatt (MW) level AC output, thereby meeting the needs of large-scale energy storage.

[0004] However, the fixed dimensions of standard shipping containers place extremely stringent requirements on the structural design of energy storage converters. To achieve efficient use of the space within the container and ensure a rational system layout and convenient assembly, the energy storage converter's structure must be minimized in the height direction as much as possible.

[0005] However, current modular liquid-cooled energy storage converters on the market have certain drawbacks in terms of internal component and single-board layout design. They primarily employ a two-layer layout, placing the inverter power devices and heat exchangers above the liquid-cooled plate and the power inductors below. While this layout addresses heat dissipation requirements to some extent, it results in generally large module heights, occupying excessive internal container height space. Furthermore, precisely because of the generally large height of individual liquid-cooled energy storage converters, two identical converters are typically arranged front-to-back within the unit. This front-to-back arrangement requires the output cables of the rear module to cross over the front module. This not only significantly increases the difficulty of system design, making the wiring process complex and cumbersome, but also results in long and unsmooth wiring, prone to cable tangling and interference. These problems not only hinder system integration design but also further reduce the system's power density and operating efficiency, affecting the overall performance of the energy storage system.

[0006] In conclusion, given the numerous problems in the design and layout of energy storage converters in current AC / DC integrated energy storage systems, there is an urgent need to conduct in-depth research and improvement on existing technologies to enhance the overall performance and competitiveness of energy storage systems.

[0007] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0008] This invention provides a liquid-cooled energy storage converter to solve the problems existing in the prior art.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A liquid-cooled energy storage converter includes a housing and, disposed within the housing, a DC filter unit, a DC fuse, a DC relay, an inverter power device, a liquid-cooled plate, a DC support capacitor, a power inductor, a heat exchanger, an AC relay, an AC power filter unit, an auxiliary power system, an AC EMI filter unit, a control unit, a first fan, a second fan, a third fan, and a fourth fan; wherein,

[0011] The inverter power devices, power inductors, and heat exchangers are respectively mounted on the liquid cooling plate;

[0012] The heat exchanger, the first fan, and the second fan are arranged sequentially in a straight line;

[0013] The heat exchanger is used to convert hot air into cold air;

[0014] The first fan and the second fan are respectively used to draw hot air from the heat exchanger and blow cold air.

[0015] The AC relay, AC power filter unit, and auxiliary power system are located on the cold air blowing path of the first fan;

[0016] The AC EMI filter unit and the control unit are located on the cold air blowing path of the second fan;

[0017] The third fan is located on one side of the cold air blowing path of the first fan and the second fan, and is used to disturb the cold air blown by the first fan and the second fan so as to change the direction of blowing.

[0018] The control unit, DC filter unit, DC fuse, DC relay, inverter power device, and auxiliary power system are located on the cold air blowing path of the third fan;

[0019] The fourth fan is located on one side of the cold air blowing path of the third fan, and is used to disturb the cold air blown by the third fan, so as to reverse the direction and blow it to the air inlet of the heat exchanger to form a circulating heat dissipation loop.

[0020] The inverter power device and the DC support capacitor are located in the cold air blowing path of the fourth fan.

[0021] Furthermore, in the liquid-cooled energy storage converter, the DC filter unit is disposed on the inner side wall of the housing.

[0022] Furthermore, in the liquid-cooled energy storage converter, there are two DC fuses;

[0023] The two DC fuses are arranged in a staggered manner and at least partially overlap in the horizontal direction.

[0024] Furthermore, in the liquid-cooled energy storage converter, the heat exchanger is a heat dissipation fin, and it is integrally formed with the liquid cooling plate.

[0025] Furthermore, in the liquid-cooled energy storage converter, the first fan and the second fan are heat exchange fans;

[0026] The third and fourth fans are turbulence fans.

[0027] Furthermore, in the liquid-cooled energy storage converter, the heat exchanger is located on the water inlet area of ​​the liquid cooling plate.

[0028] Furthermore, the liquid-cooled energy storage converter also includes a DC input terminal, an AC output terminal, and a signal interface;

[0029] The DC input terminal, AC output terminal, and signal interface are respectively located on the outer front part of the enclosure.

[0030] Furthermore, the liquid-cooled energy storage converter also includes a heat exchange unit and a current sensor;

[0031] The heat exchange unit is disposed inside the box and is located in front of the air inlet of the heat exchanger;

[0032] The current sensor is installed inside the enclosure.

[0033] Furthermore, the liquid-cooled energy storage converter also includes indicator lights, coolant inlet and outlet, and pressure relief valve;

[0034] The indicator light and the coolant inlet / outlet are respectively located on the front outer side of the housing;

[0035] The coolant inlet and outlet are connected to the liquid cooling plate;

[0036] The pressure relief valve is located on the rear outer side of the housing.

[0037] Furthermore, the liquid-cooled energy storage converter also includes an auxiliary installation handle;

[0038] The auxiliary installation handle is located on the outside of the housing.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] This utility model provides a liquid-cooled energy storage converter. By arranging the inverter power devices, power inductors, and heat exchangers coplanarly on a liquid-cooled plate to form a single-layer planar design, and using a first fan, a second fan, a third fan, and a fourth fan to form a closed-loop heat dissipation circuit, the height of the module is significantly reduced. This not only significantly reduces the occupation of the internal height space of the container but also meets the heat dissipation requirements. At the same time, it also allows two liquid-cooled energy storage converters to be stacked and installed vertically inside the container, making the module wiring more convenient, the system layout more reasonable and compact, improving the system power density and integration, simplifying the wiring and assembly process, and enhancing the overall performance and reliability of the integrated AC / DC energy storage unit.

[0041] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a top view structural schematic diagram of a liquid-cooled energy storage converter provided in an embodiment of this utility model;

[0044] Figure 2 This is a (front view) structural schematic diagram of a liquid-cooled energy storage converter provided in an embodiment of this utility model;

[0045] Figure 3 This is a schematic diagram of the circulating heat dissipation circuit provided in an embodiment of the present invention.

[0046] Figure label:

[0047] DC input terminal 1, enclosure 2, DC filter unit 3, DC fuse 4, DC relay 5, inverter power device 6, liquid cooling plate 7, DC support capacitor 8, power inductor 9, heat exchange unit 10, heat exchanger 11, current sensor 12, AC relay 13, AC power filter unit 14, AC output terminal 15, signal interface 16, indicator light 17, coolant inlet / outlet 18, auxiliary power system 19, AC EMI filter unit 20, control unit 21, pressure relief valve 22, first fan 23, second fan 24, third fan 25, fourth fan 26, auxiliary installation handle 27. Detailed Implementation

[0048] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0049] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0050] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0051] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0052] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0053] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0054] In this application, expressions such as "greater than", "less than", and "exceeding" are understood to exclude the stated number; expressions such as "above", "below", and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times", unless otherwise explicitly specified.

[0055] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0057] Please refer to Figure 1-2This utility model embodiment provides a liquid-cooled energy storage converter, including a housing 2 and a DC filter unit 3, a DC fuse 4, a DC relay 5, an inverter power device 6, a liquid cooling plate 7, a DC support capacitor 8, a power inductor 9, a heat exchanger 11, an AC relay 13, an AC power filter unit 14, an auxiliary power system 19, an AC EMI filter unit 20, a control unit 21, a first fan 23, a second fan 24, a third fan 25, and a fourth fan 26, all disposed within the housing 2.

[0058] In terms of component layout design, the inverter power device 6, power inductor 9, and heat exchanger 11, which generate the most heat, are precisely positioned on the liquid cooling plate 7. This layout lays the foundation for subsequent heat dissipation and overall structural design. The heat exchanger 11, the first fan 23, and the second fan 24 are arranged in a straight line in space. This orderly arrangement helps to form a stable airflow channel. The heat exchanger 11 undertakes the key heat conversion function, converting the hot air generated during equipment operation into cold air, thus ensuring the heat dissipation of the equipment. The first fan 23 and the second fan 24 work together, respectively drawing in hot air and directing it through the heat exchanger 11, and then blowing the converted cold air outwards, ensuring that the cold air can effectively reach the key parts of the equipment.

[0059] The AC relay 13, AC power filter unit 14, and auxiliary power system 19 are cleverly positioned on the cold air blowing path of the first fan 23. This arrangement allows these components to be cooled by cold air in a timely manner during operation, ensuring that their operating temperature remains within a reasonable range and thus maintaining stable performance. The AC EMI filter unit 20 and control unit 21 are located on the cold air blowing path of the second fan 24, and can also benefit from the cold air blown by the second fan 24, achieving effective heat dissipation.

[0060] The third fan 25 is positioned on one side of the cold air blowing path of the first fan 23 and the second fan 24. Its unique function is to disturb the cold air blown by the first fan 23 and the second fan 24, changing the direction of the cold air flow and achieving reverse blowing. This design can further optimize the distribution of cold air and ensure that all areas inside the equipment are adequately cooled. The control unit 21, DC filter unit 3, DC fuse 4, DC relay 5, inverter power device 6, and auxiliary power system 19 are all located on the cold air blowing path of the third fan 25, and can fully benefit from the heat dissipation effect brought by the third fan 25.

[0061] The fourth fan 26 is located on one side of the cold air blowing path of the third fan 25. Its main function is to further agitate the cold air blown by the third fan 25, causing the cold air to be redirected and blown to the air inlet of the heat exchanger 11, thereby forming a complete and closed circulating heat dissipation loop. Figure 3 As shown. This closed-loop cooling circuit design maximizes heat dissipation efficiency and reduces heat buildup. The inverter power device 6 and DC support capacitor 8 are positioned in the cold air blowing path of the fourth fan 26, ensuring that these two critical components maintain a suitable temperature during operation.

[0062] The liquid-cooled energy storage converter designed in this embodiment has significant innovation and advantages. By coplanarly arranging the inverter power device 6, power inductor 9, and heat exchanger 11 on the liquid cooling plate 7, a single-layer planar design is successfully formed. This design concept breaks through the limitations of traditional layouts, greatly optimizing the module's height and significantly reducing its overall height. This change not only significantly reduces the liquid-cooled energy storage converter's occupation of the container's internal height space, providing more space for the layout of other equipment within the container, but also fully meets the heat dissipation requirements of the equipment during operation, ensuring efficient operation of the equipment at a stable operating temperature.

[0063] This unique design also brings numerous other benefits. Due to the reduced module height, two liquid-cooled energy storage converters can be stacked vertically within the container, significantly improving the utilization of internal space. Furthermore, module wiring becomes more convenient, resulting in a more rational and compact system layout, effectively increasing the system's power density and integration. Wiring and assembly are simplified, reducing unnecessary steps and lowering installation difficulty and cost. In addition, this optimized design enhances the overall performance and reliability of the integrated AC / DC energy storage unit, enabling it to better adapt to complex and changing working environments and providing strong support for the stable operation of the energy storage system.

[0064] Please refer to this again. Figure 1 In one embodiment of this invention, the layout of the DC filter unit 3 has been carefully optimized. Specifically, the DC filter unit 3 is cleverly positioned on the inner side wall of the housing 2. This unique design arrangement is not arbitrary but rather the result of careful consideration.

[0065] From a space utilization perspective, placing the DC filter unit 3 on the inner side wall of the container 2 effectively avoids it occupying too much space in the depth direction of the equipment. In traditional layout designs, the DC filter unit may occupy space in the depth direction of the equipment due to arbitrary placement, resulting in an increase in the overall volume of the liquid-cooled energy storage converter, which in turn affects the rationality of its layout within the container. However, the layout in this embodiment makes full use of the relatively idle space resource of the container side wall, allowing the dimensions of the equipment in the depth direction to be compressed, thereby achieving the integration of more functional components within a limited space.

[0066] From the perspective of power density improvement, power density is an important indicator of equipment performance, reflecting the amount of power that the equipment can output per unit volume. By reducing the space occupied by the DC filter unit 3 in the depth direction, the entire liquid-cooled energy storage converter can accommodate more power-related components within the same volume, or increase the output power without increasing the volume. This means that more liquid-cooled energy storage converters with higher power density can be installed within the same container space, thereby significantly improving the power output capability of the entire energy storage system and meeting the high power requirements of large-scale energy storage applications.

[0067] In summary, the practice of placing the DC filter unit 3 on the inner side wall of the housing 2 in this embodiment not only optimizes the spatial layout of the equipment and improves the space utilization rate, but also fundamentally improves the power density of the liquid-cooled energy storage converter, laying a solid foundation for the efficient operation and performance improvement of the energy storage system.

[0068] In one embodiment of this invention, an innovative design was implemented regarding the number and layout of the DC fuses 4. Specifically, the liquid-cooled energy storage converter is equipped with two DC fuses 4.

[0069] In terms of layout design, the two DC fuses 4 do not adopt the common vertical side-by-side arrangement, but instead employ a unique staggered arrangement strategy. This staggered arrangement is not a simple random placement, but rather an optimized design. Specifically, in the horizontal direction, the two DC fuses 4 have at least a partial overlap. This ingenious layout design makes full use of space, breaking the limitations of traditional layouts in terms of space utilization.

[0070] Compared to the traditional side-by-side arrangement, the staggered arrangement in this embodiment offers significant spatial advantages. Through actual measurement and theoretical analysis, this staggered arrangement reduces the overall height of the area containing the DC fuse 4 by 20%. This data is not arbitrary but derived through precise modeling and simulation analysis, taking into account factors such as the size and shape of the DC fuse 4 and the internal spatial structure of the enclosure.

[0071] From a practical application perspective, reducing the height has several significant implications. First, in the design of the liquid-cooled energy storage converter itself, a lower height means that more functional components can be integrated within a limited space, or more layout space can be provided for other components without changing the overall volume, thereby optimizing the overall performance of the equipment. Second, when installing the liquid-cooled energy storage converter inside a container, the reduced height allows for the vertical installation of more converter modules within the container, improving the utilization of the container's internal space and increasing the capacity of the energy storage system. Furthermore, this layout also helps improve the equipment's heat dissipation performance, as the more compact layout reduces airflow resistance, improves heat dissipation efficiency, and further ensures stable operation of the equipment.

[0072] In summary, the two DC fuses 4 in this embodiment are staggered and at least partially overlap in the horizontal direction. Compared with the vertically parallel arrangement, this design can effectively reduce the height by 20%, providing strong support for the performance improvement and space optimization of the liquid-cooled energy storage converter.

[0073] In one embodiment of this invention, the heat exchanger 11 has been innovatively designed and optimized. Specifically, the heat exchanger 11 adopts a heat dissipation fin structure and is integrally molded with the liquid cooling plate 7.

[0074] From the perspective of manufacturing process and structural characteristics, one-piece molding means that the heat exchanger 11 (heat dissipation fins) and the liquid cooling plate 7 are directly formed into a whole through the same or related processes during production, rather than being connected together through subsequent assembly steps. This one-piece molding structure has extremely high integrity and stability, with tight and seamless connections between the various parts, providing a good structural foundation for efficient heat conduction.

[0075] Compared to existing heat exchange structures bonded with silicone grease, the one-piece molding design in this embodiment offers significant advantages. In existing heat exchange structures, silicone grease is applied between the heat exchanger and the liquid cooling plate as an intermediate heat transfer medium, serving to bond the two and promote heat transfer. However, silicone grease itself has a certain thermal resistance, which refers to the resistance encountered during heat transfer. It hinders the rapid transfer of heat, thereby reducing heat dissipation efficiency. Moreover, silicone grease may age and crack during long-term use, further degrading its thermal conductivity and affecting the stability and reliability of the heat exchange structure.

[0076] The integrated molding design in this embodiment completely avoids these problems. Since there is no silicone grease intermediate layer between the heat exchanger 11 (heat dissipation fins) and the liquid cooling plate 7, heat can be directly transferred from the liquid cooling plate 7 to the heat dissipation fins, reducing heat transfer steps and resistance, and greatly improving heat dissipation efficiency. In practical applications, this efficient heat dissipation performance ensures that during long-term high-load operation of the liquid-cooled energy storage converter, key internal components such as the inverter power device 6 can dissipate the generated heat in a timely manner, maintaining a suitable operating temperature, thereby ensuring the stability and reliability of the equipment.

[0077] Furthermore, the unibody design offers numerous other advantages. For instance, it simplifies the manufacturing process, reduces assembly steps and the number of parts, thereby lowering production costs and timelines. Simultaneously, the reduction in intermediate connecting components decreases the probability of equipment failure, improving the overall quality and lifespan of the equipment.

[0078] In summary, in this embodiment, the heat exchanger 11 is designed as a heat dissipation fin structure integrally formed with the liquid cooling plate 7. Compared with the existing heat exchange structure bonded by silicone grease, this effectively reduces the thermal resistance of intermediate heat transfer, significantly improves heat dissipation efficiency, and provides a strong guarantee for the performance improvement and stable operation of the liquid-cooled energy storage converter.

[0079] In one embodiment of this invention, the fans equipped in the liquid-cooled energy storage converter are precisely classified and functionally positioned. Specifically, the first fan 23 and the second fan 24 are configured as heat exchange fans, while the third fan 25 and the fourth fan 26 are configured as turbulence fans.

[0080] The first fan 23 and the second fan 24, acting as heat exchange fans, play a crucial role in the heat dissipation system of the liquid-cooled energy storage converter, performing the core tasks of heat exchange and transfer. Their main working principle is to generate a powerful airflow through high-speed rotation, which effectively draws in hot air generated by the operation of electronic components inside the equipment. The hot air is guided to the heat exchanger 11 by the fans' suction force. The heat exchanger 11, as a key component for heat conversion, transfers heat from the hot air to the cooling medium (such as the coolant in the liquid cooling plate), thus transforming the hot air into cold air. The first fan 23 and the second fan 24 then blow the cooled air from the heat exchanger 11 to key areas inside the equipment, such as the locations of components like the AC relay 13, AC power filter unit 14, auxiliary power system 19, AC EMI filter unit 20, and control unit 21. Through this continuous process of hot air extraction and cold air blowing, the first fan 23 and the second fan 24 ensure the timely dissipation of heat inside the equipment, maintaining each component within a suitable operating temperature range, thereby ensuring the stable operation and high efficiency of the liquid-cooled energy storage converter.

[0081] The third fan 25 and the fourth fan 26, acting as turbulence fans, play a unique auxiliary and optimizing role in the heat dissipation system. Their core function is to disturb and change the direction of existing airflow to achieve a more uniform heat dissipation effect. The third fan 25 is positioned on one side of the cold air blowing path of the first fan 23 and the second fan 24. When the cold air blown by the first fan 23 and the second fan 24 passes by, the third fan 25 generates turbulent airflow through its own rotation, causing the originally straight-flowing cold air to change direction and disperse. This turbulence effect allows the cold air to be blown more widely to all corners inside the equipment, especially areas that might otherwise not be effectively cooled due to dead airflow, such as the locations of components like the control unit 21, DC filter unit 3, DC fuse 4, DC relay 5, inverter power device 6, and auxiliary power system 19. In this way, the third fan 25 further improves the uniformity of heat dissipation inside the equipment, ensuring that all components enjoy sufficient cooling.

[0082] The fourth fan, 26, also acts as a turbulence fan, positioned on one side of the cold air blowing path of the third fan, 25. Its function is to further agitate the cold air blown by the third fan, redirecting it towards the air inlet of the heat exchanger 11. This design forms a closed and efficient circulating heat dissipation loop. After being cooled by the various components inside the equipment, the cold air is guided back to the heat exchanger 11 by the fourth fan, 26, for further heat exchange, thus achieving continuous heat removal and the recycling of cold air. The turbulence effect of the fourth fan, 26, not only enhances the efficiency of the circulating heat dissipation loop but also ensures that the heat exchanger 11 continuously receives a sufficient amount of cold air, maintaining its efficient heat exchange performance. Simultaneously, this design allows key components such as the inverter power device 6 and the DC support capacitor 8 to be positioned within the cold air blowing path of the fourth fan, further ensuring the heat dissipation requirements of these components.

[0083] In summary, this embodiment constructs a fully functional and highly efficient heat dissipation system by designating the first fan 23 and the second fan 24 as heat exchange fans, and the third fan 25 and the fourth fan 26 as turbulence fans. The heat exchange fans are responsible for the core heat exchange and transfer, while the turbulence fans optimize heat dissipation uniformity and form a circulating heat dissipation loop by turbulent airflow. The two cooperate and complement each other, jointly providing reliable heat dissipation guarantees for the stable operation and high efficiency performance of the liquid-cooled energy storage converter.

[0084] In one embodiment of this example, the relative positions of the heat exchanger 11 and the liquid cooling plate 7 are carefully and scientifically designed and arranged, with the heat exchanger 11 precisely positioned on the water inlet area of ​​the liquid cooling plate 7. This layout design embodies profound thermodynamic principles and engineering wisdom, and its core purpose is to ensure that the heat exchange capacity of the heat exchanger 11 can be maximized.

[0085] From a thermodynamic perspective, the liquid-cooled plate 7, as a key cooling component inside the liquid-cooled energy storage converter, works by absorbing the heat generated during equipment operation through internally circulating coolant. After absorbing heat, the coolant's temperature gradually increases. The inlet area is where the coolant first enters the liquid-cooled plate 7; at this point, the coolant's temperature is relatively low, exhibiting high heat capacity and heat absorption ability.

[0086] The heat exchanger 11 is positioned on the water inlet area of ​​the liquid cooling plate 7, allowing it to preferentially exchange heat with the low-temperature coolant. According to the second law of thermodynamics, heat always spontaneously transfers from a high-temperature object to a low-temperature object. In the liquid-cooled energy storage converter, the heat generated by the internal components is transferred to the surrounding air or cooling medium through heat conduction, and the role of the heat exchanger 11 is to transfer this heat from the inside of the equipment to the external environment. When the heat exchanger 11 comes into contact with the low-temperature coolant, the coolant rapidly absorbs heat from the surface of the heat exchanger 11, lowering its temperature and thus increasing the temperature difference between the heat exchanger 11 and the surrounding hot air. According to Newton's law of cooling, the rate of heat dissipation from an object's surface is directly proportional to the temperature difference between the object's surface and the surrounding fluid; the greater the temperature difference, the faster the heat dissipation rate. Therefore, this layout design significantly improves the heat dissipation efficiency of the heat exchanger 11, fully utilizing its heat exchange capacity.

[0087] From the perspective of coolant flow characteristics, the flow of coolant inside the liquid cooling plate 7 is a dynamic process, and its flow state is affected by a variety of factors, such as the structural design of the liquid cooling plate, the flow velocity and flow rate of the coolant. In the water inlet area of ​​the liquid cooling plate 7, the coolant enters at a higher flow velocity and a lower temperature, exhibiting strong flow activity and heat exchange capacity.

[0088] Placing the heat exchanger 11 in the water inlet area allows for full utilization of the excellent flow characteristics of the coolant during the water inlet phase. As the coolant flows through the heat exchanger 11, it can wash over the surface of the heat exchanger 11 at a high flow rate, breaking down the thermal boundary layer formed on the surface of the heat exchanger 11, reducing thermal resistance, and thus improving heat transfer efficiency. Simultaneously, the low-temperature coolant, after absorbing heat, gradually increases in temperature but can still continue to flow inside the liquid cooling plate 7, carrying heat to other areas for dissipation, forming a highly efficient heat transfer cycle. This layout design makes the flow of coolant within the entire liquid cooling plate 7 more rational, the heat distribution more uniform, and further improves the heat exchange capacity of the entire liquid cooling system.

[0089] From the perspective of practical application, during the actual operation of a liquid-cooled energy storage converter, the internal components generate a large amount of heat. If this heat cannot be dissipated in a timely and effective manner, it will cause the equipment temperature to rise, affecting its performance and lifespan. By placing the heat exchanger 11 on the water inlet area of ​​the liquid cooling plate 7, it can be ensured that the heat exchanger 11 is always in the optimal heat exchange state, transferring the heat generated inside the equipment in a timely manner and maintaining the equipment's low-temperature operation.

[0090] Through actual testing and verification, the heat exchange capacity of the liquid-cooled energy storage converter 11, which adopts this layout design, is significantly improved compared with the traditional layout, effectively ensuring the stability and reliability of the equipment during long-term high-load operation. At the same time, this layout design also reduces the energy consumption of the equipment and lowers operating costs, resulting in significant economic and environmental benefits.

[0091] In summary, the design of placing the heat exchanger 11 on the water inlet area of ​​the liquid cooling plate 7 in this embodiment is the result of comprehensive consideration of various factors, including thermodynamic principles, coolant flow characteristics, and practical application effects. This design ensures that the heat exchanger 11 achieves maximum heat exchange capacity, providing a reliable guarantee for the efficient operation of the liquid-cooled energy storage converter.

[0092] Please refer to this again. Figure 1-2 In one embodiment of this invention, the liquid-cooled energy storage converter is further equipped with several key components, including a DC input terminal 1, an AC output terminal 15, and a signal interface 16, based on the original structure.

[0093] From the perspective of component layout design, the DC input terminal 1, AC output terminal 15, and signal interface 16 are all carefully positioned on the front outer side of the enclosure 2. The DC input terminal 1 serves as the hub connecting the liquid-cooled energy storage converter to an external DC power supply. Its placement on the front outer side facilitates a quick and stable connection with the DC power supply, ensuring smooth DC power input into the converter. The AC output terminal 15 plays a crucial role in outputting the AC power converted by the converter to external AC loads. Its placement on the front outer side facilitates interface with various AC devices, enabling efficient power transmission. The signal interface 16 serves as the channel for information exchange between the converter and external control systems, enabling monitoring, control, and debugging of the converter. Its placement on the front outer side facilitates cable connection and signal transmission operations, improving the operability and maintainability of the equipment.

[0094] Please refer to this again. Figure 1 In one embodiment of this invention, the liquid-cooled energy storage converter also includes two important components: a heat exchange unit 10 and a current sensor 12.

[0095] The heat exchange unit 10 is cleverly positioned inside the housing 2, on the liquid cooling plate 7, and precisely in front of the air inlet of the heat exchanger 11. The heat exchange unit 10 plays a crucial role in the heat dissipation system of the liquid-cooled energy storage converter. It can fully exchange heat with the air entering the heat exchanger 11, preheating or precooling the air to optimize the heat exchange effect of the heat exchanger 11. Positioning the heat exchange unit 10 in front of the air inlet of the heat exchanger 11 ensures that the air entering the heat exchanger 11 has a suitable temperature and condition, improving heat transfer efficiency and further enhancing the performance of the entire heat dissipation system. The current sensor 12 is also located inside the housing 2. It is mainly used to monitor the magnitude and changes of the current in the internal circuit of the liquid-cooled energy storage converter in real time. Accurate monitoring of the current allows for timely detection of abnormalities in the circuit, such as overload and short circuit, providing crucial protection for the safe operation of the equipment. Simultaneously, the current data collected by the current sensor 12 can also provide feedback information to the equipment's control system, enabling precise control and optimized adjustment of the equipment's operating status.

[0096] Please refer to this again. Figure 1-2 In one embodiment of this invention, the liquid-cooled energy storage converter is also equipped with additional components such as indicator light 17, coolant inlet and outlet 18, and pressure relief valve 22.

[0097] Indicator light 17 and coolant inlet / outlet 18 are respectively located on the front outer side of the housing 2. Indicator light 17 serves as a visual display device for the equipment's operating status, conveying various operating status information to operators through light signals of different colors and flashing frequencies, such as normal operation, fault alarm, and standby. Its location on the front outer side allows operators to easily observe the equipment's status during operation and promptly identify and address problems. Coolant inlet / outlet 18 is tightly connected to the liquid cooling plate 7, serving as a crucial channel for coolant circulation in the liquid cooling system. Through coolant inlet / outlet 18, coolant can be injected, discharged, and circulated, ensuring that the liquid cooling plate 7 can continuously and effectively absorb the heat generated inside the equipment, maintaining its low-temperature operation. Positioning coolant inlet / outlet 18 on the front outer side facilitates coolant addition, replacement, and maintenance operations, improving the maintainability of the equipment. Pressure relief valve 22 is located on the rear outer side of the housing 2, playing a vital role in the safety protection of the liquid-cooled energy storage converter. When the internal pressure of the equipment exceeds the set value due to various reasons (such as increased coolant temperature, malfunction, etc.), the pressure relief valve 22 will automatically open to release the internal pressure, preventing the equipment from being damaged or exploding due to excessive pressure, thus ensuring the safety of the equipment and operators.

[0098] Please refer to this again. Figure 1-2In one embodiment of this invention, the liquid-cooled energy storage converter is further provided with an auxiliary installation handle 27. The auxiliary installation handle 27 is strategically positioned on the outside of the housing 2, facilitating the installation, handling, and relocation of the equipment. During installation, operators can easily move the equipment to the designated location and secure it by gripping the auxiliary installation handle 27. Simultaneously, the auxiliary installation handle 27 also plays a crucial role when the equipment requires maintenance, repair, or relocation, improving operational convenience and work efficiency.

[0099] Although this application frequently uses terms such as "box" and "liquid cooling plate," the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0100] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A liquid-cooled energy storage converter, characterized in that, Includes a housing (2) and, within the housing (2), a DC filter unit (3), a DC fuse (4), a DC relay (5), an inverter power device (6), a liquid cooling plate (7), a DC support capacitor (8), a power inductor (9), a heat exchanger (11), an AC relay (13), an AC power filter unit (14), an auxiliary power system (19), an AC EMI filter unit (20), a control unit (21), a first fan (23), a second fan (24), a third fan (25), and a fourth fan (26); wherein, The inverter power device (6), power inductor (9), and heat exchanger (11) are respectively mounted on the liquid cooling plate; The heat exchanger (11), the first fan (23), and the second fan (24) are arranged sequentially in a straight line; The heat exchanger (11) is used to convert hot air into cold air; The first fan (23) and the second fan (24) are respectively used to draw hot air from the heat exchanger (11) and blow cold air. The AC relay (13), AC power filter unit (14), and auxiliary power system (19) are located on the cold air blowing path of the first fan (23); The AC EMI filter unit (20) and the control unit (21) are located on the cold air blowing path of the second fan (24); The third fan (25) is located on one side of the cold air blowing path of the first fan (23) and the second fan (24) to disturb the cold air blown by the first fan (23) and the second fan (24) so ​​as to change the direction of blowing; The control unit (21), DC filter unit (3), DC fuse (4), DC relay (5), inverter power device (6), and auxiliary power system (19) are located on the cold air blowing path of the third fan (25); The fourth fan (26) is located on one side of the cold air blowing path of the third fan (25) to disturb the cold air blown by the third fan (25) and redirect it to the air inlet of the heat exchanger (11) to form a circulating heat dissipation loop. The inverter power device (6) and the DC support capacitor (8) are located on the cold air blowing path of the fourth fan (26).

2. The liquid-cooled energy storage converter according to claim 1, characterized in that, The DC filter unit (3) is disposed on the inner side wall of the housing (2).

3. The liquid-cooled energy storage converter according to claim 1, characterized in that, There are two DC fuses (4); The two DC fuses (4) are arranged in a staggered manner and at least partially overlap in the horizontal direction.

4. The liquid-cooled energy storage converter according to claim 1, characterized in that, The heat exchanger (11) has heat dissipation fins and is integrally formed with the liquid cooling plate (7).

5. The liquid-cooled energy storage converter according to claim 1, characterized in that, The first fan (23) and the second fan (24) are heat exchange fans; The third fan (25) and the fourth fan (26) are turbulence fans.

6. The liquid-cooled energy storage converter according to claim 1, characterized in that, The heat exchanger (11) is located on the water inlet area of ​​the liquid cooling plate (7).

7. The liquid-cooled energy storage converter according to claim 1, characterized in that, It also includes a DC input terminal (1), an AC output terminal (15), and a signal interface (16). The DC input terminal (1), AC output terminal (15) and signal interface (16) are respectively located on the front outer side of the housing (2).

8. The liquid-cooled energy storage converter according to claim 1, characterized in that, It also includes a heat exchange unit (10) and a current sensor (12); The heat exchange unit (10) is disposed inside the housing (2) and is located in front of the air inlet of the heat exchanger (11); The current sensor (12) is located inside the housing (2).

9. The liquid-cooled energy storage converter according to claim 1, characterized in that, It also includes indicator lights (17), coolant inlet and outlet (18) and pressure relief valve (22); The indicator light (17) and the coolant inlet / outlet (18) are respectively located on the front outer side of the housing (2); The coolant inlet / outlet (18) is connected to the liquid cooling plate (7); The pressure relief valve (22) is located on the rear outer side of the housing (2).

10. The liquid-cooled energy storage converter according to claim 1, characterized in that, It also includes an auxiliary installation handle (27); The auxiliary installation handle (27) is located on the outside of the housing (2).

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