Energy Storage Converter

Abstract

The present application relates to the field of energy storage technology and discloses an energy storage converter. The energy storage converter includes a housing, a liquid cooling plate, and a circuit board assembly. The housing has a receiving cavity, and a first opening and a second opening connected to the receiving cavity. The liquid cooling plate is arranged in the receiving cavity, and a flow channel for the flow of coolant is provided in the liquid cooling plate, as well as a first cooling space and a second cooling space formed on the flow channel. The liquid cooling plate is connected to a liquid inlet pipe and a liquid outlet pipe, one end of the liquid inlet pipe is connected to the first end of the flow channel, and the other end of the liquid inlet pipe passes through the receiving cavity from the first opening. One end of the liquid outlet pipe is connected to the second end of the flow channel, and the other end of the liquid outlet pipe passes through the receiving cavity from the second opening. The circuit board assembly is connected to the liquid cooling plate and is located on one side of the liquid cooling plate. The circuit board assembly includes a circuit board and a first heating device and a second heating device electrically connected to the circuit board. The energy storage converter provided by the present application can help ensure the heat dissipation effect of the liquid cooling plate in the energy storage converter.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage converter. Background Art

[0002] With the continuous development of new energy technologies, the application of energy storage devices is becoming increasingly widespread. Energy storage devices store electrical energy in battery modules composed of battery cells and output it when needed. In addition to battery modules, energy storage devices also include battery management devices, energy management devices, and energy storage inverters. Energy storage inverters control the charging and discharging processes of battery modules and are key components for bidirectional energy flow between energy storage devices and the power grid.

[0003] Energy storage inverters contain numerous electronic components, some of which generate heat during operation, causing the internal temperature of the inverter to rise. Typically, these inverters are equipped with liquid cooling plates to dissipate heat. The cooling performance of these plates can affect the proper functioning of the inverter. Therefore, ensuring effective cooling within the inverter is a critical issue. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide an energy storage converter, which can help ensure the heat dissipation effect of the liquid cooling plate in the energy storage converter.

[0005] To address the above-mentioned technical problems, embodiments of the present application provide an energy storage converter. The energy storage converter includes a housing, a liquid cooling plate, and a circuit board assembly. The housing has a housing cavity, and a first opening and a second opening communicating with the housing cavity. The liquid cooling plate is disposed within the housing cavity, and is provided with a flow channel for coolant flow, as well as a first cooling space and a second cooling space formed within the flow channel. The liquid cooling plate is connected to a liquid inlet and a liquid outlet. One end of the liquid inlet is connected to the first end of the flow channel, and the other end of the liquid inlet extends out of the housing cavity through the first opening. One end of the liquid outlet is connected to the second end of the flow channel, and the other end of the liquid outlet extends out of the housing cavity through the second opening. The circuit board assembly is connected to the liquid cooling plate and is located on one side of the liquid cooling plate. The circuit board assembly includes a circuit board and a first heating element and a second heating element electrically connected to the circuit board. The first heating element is attached to the liquid cooling plate and faces the first cooling space, and the second heating element is attached to the liquid cooling plate and faces the second cooling space.

[0006] The energy storage converter provided by the embodiment of the present application uses a liquid cooling plate in the box to perform liquid cooling and heat dissipation on the circuit board assembly. The liquid cooling plate is provided with a flow channel and cooling spaces corresponding to different electronic components. In the process of circulating the coolant in the flow channel, it will pass through different cooling spaces in turn, and then take away the heat conducted to the surface of the liquid cooling plate from different electronic components and the entire circuit board assembly. By forming cooling spaces at different parts of the liquid cooling plate, a wide space can be provided for the flow of coolant, thereby effectively taking away the heat conducted to the surface of the liquid cooling plate from the electronic components. This ensures the heat dissipation effect of the liquid cooling plate in the energy storage converter.

[0007] In some embodiments, the liquid cooling plate includes a base plate and a cover plate, the base plate includes a flow channel area that is recessed from one side toward the other side to form a flow channel, forming a first area of ​​a first cooling space, and a second area of ​​a second cooling space, the cover plate is connected to the base plate and covers the flow channel area, the first area, and the second area, and the first heating device and the second heating device are attached to the cover plate.

[0008] In some embodiments, the area of ​​the first region is larger than that of the second region. In this way, the structural strength of the first cooling space can be ensured by making the area of ​​the first region larger than that of the second region.

[0009] In some embodiments, there are multiple first heating devices, each of which is placed on the liquid cooling plate in the same direction and faces the same first cooling space. Multiple diversion structures corresponding to the first heating devices are provided within the first cooling space. The diversion structures are configured to direct the coolant along the direction in which the first heating devices are arranged. This ensures effective heat dissipation for larger first heating devices by aligning the multiple first heating devices with the same first cooling space.

[0010] In some embodiments, the flow diversion structure includes a plurality of spaced-apart ribs, each rib extending along the arrangement direction of the plurality of first heating elements, and the arrangement direction of the plurality of ribs being perpendicular to the arrangement direction of the plurality of first heating elements. In this way, the flow diversion structure formed by the ribs can guide the coolant while improving the structural strength of the first cooling space.

[0011] In some embodiments, there are multiple second heating devices and multiple second cooling spaces, and the multiple second heating devices are arranged in a one-to-one correspondence with the multiple second cooling spaces. In this way, each second heating device can be cooled by the independently provided second cooling space, thereby ensuring the heat dissipation effect of the smaller second heating devices.

[0012] In some embodiments, a plurality of spoiler columns are provided in each second cooling space, and the plurality of spoiler columns are distributed in an array in the second cooling space. In this way, the provision of the spoiler columns can improve the heat dissipation effect of the second heating element.

[0013] In some embodiments, the plurality of second cooling spaces include a plurality of first subspaces and a plurality of second subspaces, each corresponding to the first subspaces. Each first subspace is spaced apart from and interconnected with the corresponding second subspace. Thus, by grouping the plurality of second cooling spaces, the flow path structure can be simplified and the length of the flow path can be reduced.

[0014] In some embodiments, at least some of the plurality of first subspaces are in communication with the first cooling space. In this way, by making at least some of the first subspaces simultaneously in communication with the first cooling space, different first subspaces can be connected in parallel in the flow channel structure.

[0015] In some embodiments, a divider is provided in the flow channel, extending in the same direction as the flow channel, and having a notch facing the first cooling space or the second cooling space. Thus, the divider can be used to divide the flow channel and increase the flow rate of the coolant in the flow channel.

[0016] In some embodiments, the housing includes a first inner wall facing one side of the liquid cooling plate and a second inner wall facing the other side of the liquid cooling plate. A gap is formed between the liquid cooling plate and the first and second inner walls, and the liquid cooling plate is provided with a through hole extending through the thickness of the liquid cooling plate. This gap between the liquid cooling plate and the inner wall of the housing creates distinct spaces on either side of the liquid cooling plate, allowing air convection to aid heat dissipation through the through holes.

[0017] In some embodiments, there are multiple through holes, and the multiple through holes are distributed between the first cooling space and the second cooling space. In this way, the air convection effect can be improved by increasing the number of through holes.

[0018] In some embodiments, the flow channel includes an inlet channel, an outlet channel, and a series flow channel. One end of the inlet channel is connected to the inlet pipeline, and the other end of the inlet channel is connected to the first cooling space. One end of the outlet channel is connected to the outlet pipeline, and the other end of the outlet channel is connected to the second cooling space. The series flow channel connects the first cooling space and the second cooling space. In this way, a complete flow channel structure can be formed within the liquid cooling plate through the different flow channels, ensuring a complete flow path for the coolant.

[0019] In some embodiments, the liquid inlet and outlet channels are located on opposite sides of the first cooling space or the second cooling space. This allows for reducing the impact between the liquid inlet and outlet ends and reducing space usage by separating the liquid inlet and outlet channels on opposite sides of the cooling space.

[0020] In some embodiments, the liquid cooling plate includes a first edge and a second edge disposed opposite each other, with a plurality of first heating devices disposed along the first edge, and liquid inlet and outlet pipes connected to the second edge. Thus, by centrally connecting the liquid inlet and outlet pipes at the second edge, the pipe layout can be optimized and connection convenience can be improved.

[0021] In some embodiments, the energy storage converter further includes a liquid detection assembly, which is disposed within the accommodating cavity and adjacent to the liquid inlet or outlet pipes. Thus, leakage within the accommodating cavity can be detected by the liquid detection assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of the energy storage converter provided in some embodiments of the present application;

[0024] Figure 2 is a schematic diagram of the internal structure of the energy storage converter provided in some embodiments of the present application;

[0025] Figure 3 This is a schematic diagram of a partial assembly structure of a box in an energy storage converter provided in some embodiments of the present application;

[0026] Figure 4 This is a schematic diagram of the coordination structure of the liquid cooling plate and the heating device in the energy storage converter provided in some embodiments of the present application;

[0027] Figure 5 is a schematic diagram of the three-dimensional structure of a liquid cooling plate in an energy storage converter provided in some embodiments of the present application;

[0028] Figure 6 1 is a schematic diagram of the three-dimensional structure of the bottom plate of the liquid cooling plate in the energy storage converter provided in some embodiments of the present application;

[0029] Figure 7 is a schematic top view of the structure of the bottom plate of the liquid cooling plate in the energy storage converter provided in some embodiments of the present application;

[0030] Figure 8is a schematic diagram of the three-dimensional structure of the bottom plate of the liquid cooling plate in the energy storage converter provided in some embodiments of the present application from another perspective;

[0031] Figure 9 This is a schematic diagram of the bottom structure of the liquid cooling plate in the energy storage converter provided in some embodiments of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present application. The various embodiments can be combined with each other and referenced to each other under the premise of no contradiction.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0034] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0035] As renewable energy generation continues to increase, the importance of energy storage is also growing. Energy storage devices use battery cells as energy storage units, forming electrochemical energy storage systems. The power conversion system (PCS) is the part of the energy storage device that controls the AC / DC bidirectional conversion process during charging and discharging, and is the core device of the energy storage device.

[0036] As the battery capacity of energy storage devices continues to increase, the power of energy storage inverters is also increasing. During operation, the internal electrical components of energy storage inverters generate significant heat, causing internal temperatures to rise and impacting normal operation. Currently, the main cooling methods used in energy storage inverters include air cooling and liquid cooling. Due to the low heat exchange efficiency of air cooling, the heat dissipation effect on the electronic components within the energy storage inverter is limited, making it difficult to control the temperature of these high-heat-generating electronic components. Liquid cooling uses a liquid cooling plate to dissipate heat. A cooling medium circulates within the liquid cooling plate, continuously removing heat generated by the electronic components during operation. Liquid cooling plates can effectively improve heat exchange efficiency. However, given the large number of electronic components in energy storage inverters, it is necessary to design a heat dissipation coordination between the electronic components and the liquid cooling plate to ensure effective heat dissipation for different electronic components.

[0037] In order to ensure the heat dissipation effect of the liquid cooling plate in the energy storage inverter, some embodiments of the present application provide an energy storage inverter. The liquid cooling plate in the energy storage inverter is designed with different cooling spaces for different electronic components. When the cooling medium circulates in the liquid cooling plate, it will spread in different cooling spaces. Electronic components with higher heat generation are arranged in the area corresponding to the cooling space in the liquid cooling plate. The electronic components are in contact with the surface of the cooling space corresponding to the liquid cooling plate. The heat generated by the electronic components during operation can be promptly conducted to the cooling medium circulating in the liquid cooling plate. In this way, different electronic components can be effectively dissipated by the cooling medium circulating in the liquid cooling plate, ensuring the heat dissipation effect of different electronic components.

[0038] The following combination Figures 1 to 9 The structure of the energy storage converter provided in some embodiments of the present application is described.

[0039] like Figures 1 to 9As shown, the energy storage converter provided in some embodiments of the present application includes a housing 11, a liquid cooling plate 12, and a circuit board assembly 13. The housing 11 has a housing 101, and a first opening 102 and a second opening 103 communicating with the housing 101. The liquid cooling plate 12 is disposed within the housing 101. The liquid cooling plate 12 is provided with a flow channel 121 for the flow of coolant, as well as a first cooling space 122 and a second cooling space 123 formed on the flow channel 121. The liquid cooling plate 12 is connected to a liquid inlet line 124 and a liquid outlet line 125. One end of the liquid inlet line 124 communicates with a first end 1211 of the flow channel 121, and the other end of the liquid inlet line 124 passes through the housing 101 through the first opening 102. One end of the liquid outlet line 125 communicates with a second end 1212 of the flow channel 121, and the other end of the liquid outlet line 125 passes through the housing 101 through the second opening 103. The circuit board assembly 13 is connected to the liquid cooling plate 12 and is located on one side of the liquid cooling plate 12. The circuit board assembly 13 includes a circuit board 131 and a first heating element 132 and a second heating element 133 electrically connected to the circuit board 131. The first heating element 132 is attached to the liquid cooling plate 12 and faces the first cooling space 122. The second heating element 133 is attached to the liquid cooling plate 12 and faces the second cooling space 123.

[0040] The box body 11 forms the encapsulation shell of the energy storage converter, which can protect the internal circuit board assembly 13. The box body 11 has a housing cavity 101 inside, which is used to provide a housing space for the circuit board assembly 13 that plays a control role. The first opening 102 and the second opening 103 provided on the box body 11 can provide installation channels for the entry and outflow of the coolant. At the same time, a circuit interface can be provided on the box body 11 to connect the energy storage converter to the circuit of the energy storage device. The box body 11 can adopt a split structure combining a bottom shell and a top cover, the bottom shell forms an inner cavity, and the top cover closes the opening on the top of the bottom shell. The box body 11 can also adopt an enclosed structure spliced ​​by plates, and the side walls of the box body 11 are through Figure 3 The multiple strips 111 shown are connected end to end, and are formed by Figure 3 The substrate 112 and Figure 1 The top cover 113 is shown to be spliced.

[0041] The liquid cooling plate 12 is a part that plays a role in heat dissipation in the energy storage converter. The liquid cooling plate 12 can be installed in the accommodating cavity 101 of the box body 11. A plurality of through holes can be provided on the liquid cooling plate 12, and it can be fixed to the side wall of the box body 11 by fasteners. The liquid cooling plate 12 includes an installation side and a non-installation side that are relatively arranged. The installation side has a flat installation surface that can be used to install different electronic components. The liquid cooling plate 12 is provided with installation holes 1201, and the electronic components can be fixed at the position of the installation holes 1201 by fasteners. The non-installation side of the liquid cooling plate 12 faces the bottom of the box body 11, and no electronic components are arranged. By concentrating a large number of electronic components on one side of the liquid cooling plate 12, the device integration can be ensured, which is conducive to the miniaturization of the energy storage converter.

[0042] The liquid cooling plate 12 has a complete flow channel 121 and different cooling spaces formed on the flow channel 121. The cooling space is opposite the area on the surface of the liquid cooling plate 12 where electronic components are arranged. The cooling space can be set in a regular shape such as a cuboid, a cylinder, or a prism, or it can be set in an irregular shape. The size of the projected area of ​​the cooling space on the surface of the liquid cooling plate 12 is consistent with the size of the projected area of ​​the heating device attached to the surface of the liquid cooling plate 12, or the projected area of ​​the cooling space on the surface of the liquid cooling plate 12 is larger than the projected area of ​​the heating device attached to the surface of the liquid cooling plate 12. For example, the first cooling space 122 is set to correspond to the inductor, and the projected area of ​​the first cooling space 122 on the surface of the liquid cooling plate 12 can be larger than the projected area of ​​the inductor on the surface of the liquid cooling plate 12. The second cooling space 123 is set to correspond to the IGBT power module, and the projected area of ​​the second cooling space 123 on the surface of the liquid cooling plate 12 can be larger than the projected area of ​​the IGBT power module on the surface of the liquid cooling plate 12.

[0043] After entering the flow channel 121, the coolant can flow through different cooling spaces in the liquid cooling plate 12. It can take away the heat generated by the electronic components during operation and flow out of the box body 11 along the complete path. The complete path of the coolant includes an inlet pipe 124 and an outlet pipe 125. The inlet pipe 124 is used to introduce the coolant from the outside into the box body 11. One end of the inlet pipe 124 is connected to the first end 1211 of the flow channel 121, that is, the end where the coolant inlet in the liquid cooling plate 12 is located, and the other end of the inlet pipe 124 passes through the first opening 102 to the outside of the accommodating cavity 101, forming an inlet channel for the coolant. The outlet pipe 125 is used to lead the coolant circulating in the liquid cooling plate 12 out of the box body 11. One end of the liquid outlet pipe 125 is connected to the second end 1212 of the flow channel 121, i.e., the end where the coolant outlet is located in the liquid cooling plate 12. The other end of the liquid outlet pipe 125 passes through the second opening 103 and reaches outside the accommodating cavity 101, forming a liquid outlet channel for the coolant. The coolant can be water, deionized water, propylene glycol solution, ethylene glycol solution, or other coolant.

[0044] The circuit board assembly 13 controls the charging and discharging processes of the energy storage converter. The circuit board 131 within the circuit board assembly 13 contains control circuitry and is equipped with electronic components such as an IGBT (Insulated Gate Bipolar Transistor) power module, capacitors, and inductors. The circuit board assembly 13 is connected to the mounting side of the liquid cooling plate 12. Electronic components that generate significant heat are mounted on the mounting surface of the liquid cooling plate 12. The first and second heating components 132 and 133 are the electronic components within the circuit board assembly 13 that generate significant heat. These components include the inductor and the IGBT power module. The inductor and IGBT power module are positioned on the surface of the liquid cooling plate 12 in areas corresponding to the cooling space. The first and second heating components 132 and 133 can be the same or different electronic components. In practice, depending on the location of the IGBT power module and inductor, the liquid cooling plate 12 provides a heat dissipation space large enough to accommodate the coolant below the surface-mounted heat source. For example, there is a convex heat dissipation space under each IGBT power module and inductor, allowing sufficient coolant to flow under each heat source.

[0045] The energy storage converter provided in some embodiments of the present application uses a liquid cooling plate 12 in the housing 11 to perform liquid cooling on the circuit board assembly 13. A flow channel 121 and cooling spaces corresponding to different electronic components are provided inside the liquid cooling plate 12. During the circulation of the coolant in the flow channel 121, it will pass through different cooling spaces, thereby taking away the heat from different electronic components and the entire circuit board assembly 13 that is conducted to the surface of the liquid cooling plate 12. By forming cooling spaces at different locations inside the liquid cooling plate 12, a wide space can be provided for the flow and diffusion of the coolant, thereby effectively taking away the heat that is conducted to the surface of the liquid cooling plate 12 from electronic components that generate a large amount of heat. This ensures the heat dissipation effect of the liquid cooling plate 12 in the energy storage converter.

[0046] In some embodiments, the liquid cooling plate 12 may include a base plate 126 and a cover plate 127. The base plate 126 includes a flow channel region 1261 that is recessed from one side toward the other to form the flow channel 121, a first region 1262 that forms the first cooling space 122, and a second region 1263 that forms the second cooling space 123. The cover plate 127 is connected to the base plate 126 and covers the flow channel region 1261, the first region 1262, and the second region 1263. The first and second heating devices 132 and 133 are attached to the cover plate 127.

[0047] In other words, the liquid cooling plate 12 adopts a split structure. The bottom plate 126 is close to the bottom side of the liquid cooling plate 12, and the cover plate 127 is close to the top side of the liquid cooling plate 12. The flow channel 121 and the cooling space on the flow channel 121 are formed on the bottom plate 126. The bottom plate 126 is recessed from one side to the other to form the flow channel 121 for the coolant to circulate, as well as cooling spaces of the same size or different sizes. The cover plate 127 can be connected to the bottom plate 126 and cover the flow channel 121 and the cooling space on the flow channel 121. In order to form a flow channel 121 and a cooling space isolated from the outside world.

[0048] By forming the liquid cooling plate 12 by combining a base plate 126 with a cover plate 127, the structure of the liquid cooling plate 12 can be simplified, and at the same time, the production of the liquid cooling plate 12 can be facilitated. In actual situations, the base plate 126 and the cover plate 127 can both be sheet metal parts of regular shapes such as square, rectangular or circular, or sheet metal parts of special or irregular shapes. The recessed area on the base plate 126 can be formed by a stamping process. The base plate 126 and the cover plate 127 can be combined by welding to ensure the sealing of the flow channel 121 and the cooling space. In order to facilitate the installation of the liquid cooling plate 12, a folded edge 1264 can be formed at at least part of the edge around the base plate 126, and the folded edge 1264 can be overlapped on the side wall of the box body 11. At the same time, the liquid cooling plate 12 is fixed to the inside of the box body 11 by fasteners. The electronic components with high heat generation are fixed to the cover 127 by fasteners. The circuit board 131 is fixed to the cover 127 by fasteners and is spaced apart from the surface of the cover 127 to provide space for the first heating device 132 and the second heating device 133 to be attached.

[0049] In addition, the area of ​​the first region 1262 on the bottom plate 126 may be larger than the area of ​​the second region 1263 .

[0050] The cooling space is formed by creating areas of varying sizes to accommodate the installation and loading of different electronic components. First area 1262 forms the first cooling space 122 and can dissipate heat for larger inductors. Second area 1263 forms the second cooling space 123 and can dissipate heat for smaller IGBT power modules. By making the area of ​​first area 1262 larger than that of second area 1263, a larger convex bump can be formed on the side of base plate 126 away from cover plate 127, thereby increasing the structural strength of first cooling space 122 and accommodating the snug installation of inductors.

[0051] like Figure 4 and Figure 6As shown, there can be multiple first heating devices 132, and the multiple first heating devices 132 are attached to the liquid cooling plate 12 along the same direction and face the same first cooling space 122. The first cooling space 122 is provided with multiple diversion structures 128 corresponding to the multiple first heating devices 132. The diversion structures 128 are used to direct the coolant to flow along the arrangement direction of the multiple first heating devices 132.

[0052] The first heating element 132 is a larger electronic component that generates less heat than the second heating element 133. Multiple first heating elements 132 can be installed in the same first cooling space 122. This reduces interruptions in the coolant flow path within the liquid cooling plate 12, allowing the coolant to flow quickly and at a consistent rate through the installation locations of the multiple first heating elements 132. This dissipates heat from the multiple first heating elements 132 without encountering significant flow resistance.

[0053] Furthermore, diverter structures 128 corresponding to the first heating devices 132 are provided within the first cooling space 122. Each diverter structure 128 is located in an area directly opposite the installation location of the corresponding first heating device 132. The diverter structures 128 can guide the flow of coolant, allowing the coolant to flow along the arrangement direction of the multiple first heating devices 132. This allows the coolant entering the first cooling space 122 to sequentially pass through the areas where the different first heating devices 132 are located, allowing it to flow more smoothly within the first cooling space 122.

[0054] The diverter structure 128 can be formed as a columnar structure distributed in a dotted pattern, a linearly extending protruding structure, or a continuously distributed teardrop-shaped structure. The diverter structure 128 can be fixed within the cooling space or removably positioned within the cooling space to change the diversion position. The diverter structure 128 can also use diverters of the same size to achieve a constant flow rate diversion effect, or use diverters of varying sizes to achieve a variable flow rate diversion effect.

[0055] As for the formation method of the first cooling space 122 on the flow channel 121, it can be connected in series in the flow channel 121 structure. Specifically, the first cooling space 122 can be connected to different parts of the flow channel 121 in various forms. Since the first cooling space 122 occupies a larger area in the liquid cooling plate 12, one or more inlets can be set for the coolant to enter the first cooling space 122, and one or more outlets can be set for the coolant to flow out of the first cooling space 122. That is, the flow channel 121 can have a main channel to supply coolant to the first cooling space 122, or it can have multiple branch flow channels to supply coolant to the first cooling space 122 simultaneously. At the same time, the flow channel 121 can have a main channel to discharge the coolant in the first cooling space 122, or it can have multiple branch flow channels to discharge the coolant in the first cooling space 122 simultaneously. Figure 6 and Figure 7 1 shows a flow channel 121 in which the coolant enters from one side of the first cooling space 122 and is discharged from the other side. In practice, the coolant may also enter from all sides of the first cooling space 122 and be discharged from the center bottom of the first cooling space 122.

[0056] In some embodiments, the diversion structure 128 may include a plurality of ribs 1281 spaced apart from each other, each rib 1281 extending along the arrangement direction of the plurality of first heating devices 132 , and the arrangement direction of the plurality of ribs 1281 is perpendicular to the arrangement direction of the plurality of first heating devices 132 .

[0057] The ribs 1281 are protrudingly arranged in the first cooling space 122, and the multiple ribs 1281 can guide the coolant entering the first cooling space 122 to different flow paths. The ribs 1281 extend along the arrangement direction of the multiple first heating devices 132, so that the coolant can flow through the areas corresponding to different first heating devices 132 along the extension direction of the ribs 1281. At the same time, the arrangement direction of the multiple ribs 1281 is perpendicular to the arrangement direction of the multiple first heating devices 132, so that the coolant can form multiple flow paths after entering the first cooling space 122. The coolant on different flow paths can all dissipate heat for the first heating device 132.

[0058] In practice, the ribs 1281 can have a uniform thickness along their extension direction, or they can have varying thicknesses. Specifically, the ribs 1281 can be wider or narrower at one end than at the other, or wider or narrower at both ends than in the middle. Furthermore, the cross-sectional shape of the ribs 1281 can be regular, such as square, rectangular, or trapezoidal, or irregular.

[0059] like Figure 4 and Figure 6As shown, there can be multiple second heating devices 133 and multiple second cooling spaces 123 , and the multiple second heating devices 133 are arranged in a one-to-one correspondence with the multiple second cooling spaces 123 .

[0060] In other words, each second heating element 133 can be provided with a corresponding second cooling space 123. By providing an independent second cooling space 123 for each second heating element 133, each second heating element 133 can be effectively cooled. This allows for adequate cooling of second heating elements 133 that generate a greater amount of heat. Multiple second cooling spaces 123 can be distributed in different areas of uniform size, or in different areas of varying sizes.

[0061] As for the formation method of the second cooling space 123 on the flow channel 121, it can be connected in series in the flow channel 121 structure. Specifically, the second cooling space 123 can be connected to different parts of the flow channel 121 in various forms. Since the second cooling space 123 also occupies a large area in the liquid cooling plate 12, one or more inlets can be set for the coolant to enter the second cooling space 123, and one or more outlets can be set for the coolant to flow out of the second cooling space 123. That is, the flow channel 121 can have a main channel to supply coolant to the second cooling space 123, or it can have multiple branch flow channels to synchronously supply coolant to the second cooling space 123. At the same time, the flow channel 121 can have a main channel to discharge the coolant in the second cooling space 123, or it can have multiple branch flow channels to synchronously discharge the coolant in the second cooling space 123. Figure 6 and Figure 7 1 shows a flow channel 121 in which the coolant enters from one side of the second cooling space 123 and is discharged from the other side. In practice, the coolant may also enter from all sides of the second cooling space 123 and be discharged from the center bottom of the second cooling space 123.

[0062] In addition, the second cooling space 123 and the first cooling space 122 can be distributed on the same plane, and the same depth dimension can be set for different cooling spaces. The second cooling space 123 and the first cooling space 122 can also be distributed on different planes, and different depth dimensions can be set for different cooling spaces. For example, the second cooling space 123 can have a certain height difference with the first cooling space 122, and can be partially staggered with the first cooling space 122 in the thickness direction of the liquid cooling plate 12, or completely staggered with the first cooling space 122 in the thickness direction of the liquid cooling plate 12. The height difference between different cooling spaces can be used to allow the coolant to flow faster with the help of gravity, thereby improving the heat dissipation effect.

[0063] like Figure 6 and Figure 7As shown, a plurality of spoiler columns 129 may be provided in each second cooling space 123 , and the plurality of spoiler columns 129 are distributed in an array in the second cooling space 123 .

[0064] The spoiler column 129 can control the flow rate of the coolant in the second cooling space 123, so that the coolant can fully contact the inner wall surface of the portion of the liquid cooling plate 12 corresponding to the second cooling space 123. The heat conducted to the liquid cooling plate 12 by the second heating device 133 can be taken away by the coolant entering the second cooling space 123. The number of spoiler columns 129 can be set to ten to twenty, distributed in an array in the second cooling space 123. After entering the second cooling space 123, the coolant passes through the spoiler column 129 and flows between different spoiler columns 129. In this way, the flow rate of the coolant in the second cooling space 123 is controlled to ensure the heat dissipation effect of the second heating device 133. In actual situations, the spoiler column 129 can be set to a regular shape such as a cylinder, a prism or a pyramid, or it can be set to an irregular shape.

[0065] By installing spoiler columns 129 within the cooling space, the heat dissipation effect can be effectively improved. Spoiler columns 129 can divert the coolant flow, creating a turbulent effect within the cooling space that accelerates the local flow rate. This allows heat conducted to the surface of the liquid cooling plate 12 to be quickly transferred to the coolant within the cooling space, thereby improving the heat exchange effect. Furthermore, the installation of spoiler columns 129 can increase the contact surface area with the coolant, which also helps to improve the heat exchange effect.

[0066] In some embodiments, the multiple second cooling spaces 123 may include multiple first subspaces 1231 and multiple second subspaces 1232, the multiple first subspaces 1231 and the multiple second subspaces 1232 correspond one to one, and each first subspace 1231 is spaced apart from the corresponding second subspace 1232 and connected to each other.

[0067] The first subspace 1231 and the second subspace 1232 are respectively provided to correspond to different second heating devices 133. The corresponding first subspace 1231 and the second subspace 1232 maintain a communication relationship and can be arranged in parallel on the complete coolant flow path. When the number of second heating devices 133 is large, the flow length of the coolant flow path can be simplified by grouping different subspaces into corresponding groups. Some subspaces maintain a corresponding communication relationship, and under the diversion effect of the flow channel 121, they simultaneously receive the input of the coolant and allow the coolant to flow to the rear end of the coolant flow path at the same time.

[0068] In addition, at least part of the plurality of first subspaces 1231 is in communication with the first cooling space 122 .

[0069] By making at least part of the multiple first subspaces 1231 connected to the first cooling space 122, two or more first subspaces 1231 can simultaneously receive the coolant flowing out of the first cooling space 122. That is, part of the first subspaces 1231 can be arranged in parallel on the coolant flow path. So that the coolant can be diverted to the second cooling space 123 in different areas, reducing the flow path of the coolant. Ensure the heat dissipation effect of the coolant on the second heating device 133 located close to the coolant outlet. In actual circumstances, it is also possible to connect in parallel only in the first subspace 1231 and the corresponding second subspace 1232, and connect multiple first subspaces 1231 in series on the coolant flow path.

[0070] like Figure 4 As shown, six second heating devices 133 are provided. Six second cooling spaces 123 corresponding to the second heating devices 133 are provided. The six second cooling spaces 123 can be divided into three groups, each group including a first subspace 1231 and a second subspace 1232. Two of the three groups of second cooling spaces 123 are concentrated in the middle area of ​​the liquid cooling plate 12, and the other group is arranged in an area away from the first cooling space 122. The two groups of second cooling spaces 123 located in the middle area of ​​the liquid cooling plate 12 are in a parallel relationship on the coolant flow path. Another group of second cooling spaces 123 is connected in series on the coolant flow path, and is connected to the first two groups of second cooling spaces 123 at the same time. Adopting Figure 6 The arrangement of the flow channel 121 shown can simplify the structure of the flow channel 121, and the coolant can flow separately and dissipate heat for different second heating devices 133 after entering different second cooling spaces 123, thereby ensuring the overall flow rate of the coolant.

[0071] In some embodiments, a partition 14 may be provided in the flow channel 121 . The extending direction of the partition 14 is the same as that of the flow channel 121 . The partition 14 is provided with a notch 141 facing the first cooling space 122 or the second cooling space 123 .

[0072] The separator 14 can separate the coolant within the flow channel 121, allowing the coolant to flow along both sides of the separator 14. The flow rate of the coolant can be increased by reducing the cross-sectional area of ​​the flow channel 121. At the same time, the separator 14 is provided with notches 141 at positions corresponding to different cooling spaces, which can provide a reserved discontinuity area for the coolant to flow toward the cooling space, allowing the coolant flowing on the side of the separator 14 away from the cooling space to enter the cooling space. In addition, the position and size of the notch 141 can be set according to the coolant diversion requirements.

[0073] In addition, the spacer 14 can also expand the weld surface between the cover plate 127 and the base plate 126, improving the overall structural strength of the liquid cooling plate 12. The base plate 126 can be provided with screw holes 1202, which can be stamped simultaneously with the cooling space. These screw holes 1202 are used to provide screw holes, providing a foundation for fastener attachment.

[0074] In some embodiments, the housing 11 includes a first inner wall facing one side of the liquid cooling plate 12, and a second inner wall facing the other side of the liquid cooling plate 12. There is a gap between the liquid cooling plate 12 and the first inner wall and the second inner wall. The liquid cooling plate 12 is provided with a through hole 15 that penetrates the liquid cooling plate 12 in the thickness direction.

[0075] That is, there is a gap between the liquid cooling plate 12 and the inner surface of the housing 11 in the thickness direction, thereby forming a certain space on both sides of the liquid cooling plate 12. The space on the installation side of the liquid cooling plate 12 can be used to install the circuit board assembly 13, and the circuit board 131 can be fixed to the liquid cooling plate 12 using fasteners such as screws. The space on the non-installation side of the liquid cooling plate 12 forms a reserved area. During the process of circulating coolant in the liquid cooling plate 12, no electronic components are working on the non-installation side of the liquid cooling plate 12, so the temperature is relatively low. A cooling chamber with a lower temperature can be formed on the non-installation side of the liquid cooling plate 12, while an electrical chamber is formed on the installation side of the liquid cooling plate 12. The through hole 15 can provide a channel for air convection on both sides of the liquid cooling plate 12. Through air convection, the temperature in the area where the circuit board assembly 13 is located can also be reduced, thereby dissipating heat from the circuit board assembly 13. The shape of the through hole 15 can be set to a regular shape such as square, rectangular or circular, or it can be set to an irregular shape.

[0076] like Figure 5 As shown, there may be a plurality of through holes 15 , which are distributed between the first cooling space 122 and the second cooling space 123 .

[0077] Increasing the number of through-holes 15 ensures air convection on both sides of the liquid cooling plate 12, thereby improving heat dissipation. Multiple through-holes 15 can be arranged along the same direction to simplify the fabrication process. Concentrating multiple through-holes 15 in the reserved area between different cooling spaces prevents them from interfering with the fabrication of the cooling spaces.

[0078] In some embodiments, the flow channel 121 may include a liquid inlet flow channel 1213, a liquid outlet flow channel 1214, and a series flow channel 1215. One end of the liquid inlet flow channel 1213 is connected to the liquid inlet pipeline 124, and the other end of the liquid inlet flow channel 1213 is connected to the first cooling space 122. One end of the liquid outlet flow channel 1214 is connected to the liquid outlet pipeline 125, and the other end of the liquid outlet flow channel 1214 is connected to the second cooling space 123. The series flow channel 1215 connects the first cooling space 122 and the second cooling space 123.

[0079] Different flow channels 121 can serve different functions. The inlet channel 1213 can serve as the coolant inflow section, allowing the coolant to flow from the inlet pipe 124 into the cooling space. The outlet channel 1214 can serve as the coolant outflow section, allowing the coolant to flow from the cooling space to the outlet pipe 125. The serial flow channel 1215 can be connected in series between different cooling spaces, allowing the coolant to flow through them in sequence. This forms a complete serial flow channel within the liquid cooling plate 12, simplifying the flow path of the coolant.

[0080] In actual situations, the liquid inlet channel 1213 and the liquid outlet channel 1214 may be located on opposite sides of the first cooling space 122 or the second cooling space 123 .

[0081] That is, the liquid inlet and the liquid outlet of the flow channel 121 are separately arranged on both sides of the cooling space, which can reduce the mutual influence between the coolant flowing in the liquid inlet flow channel 1213 and the coolant flowing in the liquid outlet flow channel 1214.

[0082] In addition, the liquid cooling plate 12 may include a first edge and a second edge disposed opposite to each other, a plurality of first heating devices 132 are disposed along the first edge, and the liquid inlet pipe 124 and the liquid outlet pipe 125 are connected to the second edge.

[0083] The liquid cooling plate 12 can be used to arrange different components near different edges. The larger first heating element 132 can be placed along the first edge. Placing the first cooling space 122, which occupies a larger area, near the edge can help improve the space utilization of the liquid cooling plate 12. Furthermore, the liquid inlet line 124 and the liquid outlet line 125 are connected to the second edge, allowing for their centralized arrangement. This improves component integration and facilitates the connection of different components.

[0084] In some embodiments, the energy storage converter may further include a liquid detection component 104 . The liquid detection component 104 is disposed in the accommodating cavity 101 and adjacent to the liquid inlet pipeline 124 or the liquid outlet pipeline 125 .

[0085] By placing the liquid detection assembly 104 at the location where the coolant enters the liquid cooling plate 12 or flows out of the liquid cooling plate 12, leak detection can be performed at locations on the liquid cooling plate 12 where leakage is likely to occur. This allows for immediate notification of the leak within the liquid cooling plate 12 when it occurs. This allows for prompt action to protect the electronic components within the housing 11.

[0086] In practice, the liquid cold plate assembly is a key component in the cooling system of a liquid-cooled PCS, accounting for 85% to 90% of the system's cost. Improving the design and processing of the liquid cold plate assembly can reduce the cost of a liquid-cooled PCS's cooling system. Currently, liquid cold plate assemblies are manufactured by first performing separate CNC (Computer Numerical Control) machining on the upper and lower cold plate plates, followed by welding. The upper and lower cold plate plates, as well as the internal flow channels and cooling fins, are also CNC milled from aluminum ingots, which wastes both material and labor. This results in low production efficiency and high liquid cold plate costs. To address the high cost of liquid cold plates in existing liquid-cooled PCSs, some embodiments of the present application design and manufacture liquid cold plates using sheet metal stamping and welding. This design and processing solution offers numerous advantages, including uniform wall thickness and reduced weight compared to milling from aluminum ingots. Stamping also improves processing efficiency by 95% compared to milling from aluminum ingots. In addition, the stamped liquid cooling plate has a larger gas-liquid heat exchange area, a higher heat exchange effect, and a higher heat dissipation efficiency than the traditional aluminum milling liquid cooling plate.

[0087] Specifically, the upper cover of the liquid cooling plate can be made of a flat aluminum plate with a length of 629.8mm, a width of 629.5mm, and a thickness of 2mm. The upper cover mainly carries the power board, that is, the circuit board and the inductor. Because the IGBT power module and the inductor have high requirements for installation flatness, the upper cover of the liquid cooling plate is made of a 2mm aluminum plate. The holes in the upper half of the upper cover correspond to the installation holes of the inductor, and the holes in the lower half correspond to the installation holes of the IGBT power module. Figure 4 As shown, the upper half of the liquid cooling plate houses three inductors, while the lower half houses six IGBT power modules. The lower plate is constructed of stamped aluminum with a length of 629.75 mm, a width of 629.5 mm, and a thickness of 26 mm. The water inlet and outlet nozzles are welded to the lower plate.

[0088] The upper cover of the liquid cooling plate requires high flatness and can be formed by direct punching or laser punching of aluminum sheet. The lower base plate primarily serves as the coolant flow channel and can be directly stamped from aluminum sheet. The flow channel can be stamped with a V-shaped groove or a semicircular groove. To facilitate demolding, the draft angle of the V-groove on the lower base plate can be greater than 5°. Based on actual flow rate and structural dimensions, the draft angle can be designed to be 10°, and the flow channel depth can be 26mm. Based on the PCS's cooling requirements for coolant flow and system interface consistency, standard water inlet nozzles 105 and outlet nozzles 106 with a diameter of 22mm and an inner diameter of 14mm can be selected. This reduces material waste, improves production efficiency, and saves processing costs. This reduces the weight of the liquid cooling plate assembly and reduces transportation costs. This also increases the heat dissipation surface area on the outer surface of the liquid cooling plate assembly, improving heat dissipation efficiency.

[0089] Welding is a core process in the entire liquid cold plate assembly process. Poor welding can easily lead to leakage, shortening the product lifespan or even causing it to fail. The welding process is crucial to the reliability and safety of the liquid cold plate assembly. Therefore, the coolant flow channels within the liquid cold plate are designed in series. The cross-sectional shape of the channel, except for the cooling space, is kept as simple as possible, with no abrupt changes in area.

[0090] The electrical components are mounted on one side of the liquid cooling channel above the liquid cooling channel, known as the electrical compartment. All electrical components are mounted on the upper surface of the liquid cooling plate. Because heat-generating components require high heat dissipation, they are positioned close to the surface of the liquid cooling plate. The upper surface of the liquid cooling plate must maintain a certain degree of flatness. Because stamping can affect this flatness due to springback, sheet metal stamping can be performed only on the lower plate.

[0091] There are no heating devices arranged on the side below the liquid cooling channel of the liquid cooling plate, which is called the cooling chamber. A leakage detector and a drain hole can be designed. The leakage detector can be a point leakage sensor or a strip leakage sensor. Leakage detection can be achieved by electrical principles such as resistance or capacitance, or by optical principles. The leakage detector is placed outside the liquid cooling channel, in the cooling chamber, and is connected to the control circuit in the electrical chamber through a communication line. The drain port is located near the water inlet and outlet of the lower base plate of the liquid cooling channel. Under normal circumstances, the drain port is locked with bolts. When the leakage detector sounds an alarm, the bolts are loosened to drain the liquid.

[0092] The liquid cold plate is designed with different cooling spaces to meet the heat dissipation requirements of different areas. The cooling areas of the liquid cold plate include the inductor area and the IGBT power module area. The IGBT power modules heat up quickly and concentratedly, requiring strict control of the coolant flow rate and velocity through the six IGBT power modules. Because IGBT power modules require high temperature uniformity, spoiler columns are added to the cooling space of the IGBT power modules to control the flow rate and velocity in this area, ensuring that the coolant flow and velocity are approximately the same under all six IGBT power modules.

[0093] The three inductors generate a lot of heat, but their own heat dissipation area is also large, so the overall temperature rise is not rapid, and temperature uniformity is not a high requirement. The main concern is how to quickly remove the heat generated by the inductors to prevent excessive heat accumulation and affect the operation of other surrounding electrical components. Therefore, the lower cover of the liquid cold plate below the inductors has a reserved guide groove to facilitate the rapid flow of coolant through this area. At the same time, to remove heat from the inductors, the convex bulge of the liquid cold plate under the inductors is made large enough to accommodate sufficient coolant. This ensures that the coolant under the inductors maintains a large flow rate and high flow rate.

[0094] During the operation of the liquid cold plate, the coolant flow rate and flow rate can be dynamically adjusted. Specifically, the coolant flow rate and flow rate can be adjusted by monitoring the temperature rise in the IGBT power module and inductor areas. Specifically, during the initial startup of the PCS, the temperature in the electrical compartment is low, and the coolant flow rate and flow velocity are very low or even zero. Once the PCS stabilizes, the coolant flow rate and flow rate in the flow channel typically reach the rated value when the temperature in the detection area reaches 50°C-55°C. If the temperature in the detection area exceeds 65°C, the coolant flow rate and flow velocity are controlled to 1.1 times the rated output. If the temperature in the detection area exceeds 75°C, an alarm is issued, and the equipment begins to derate, with the heat generation of the equipment decreasing until the temperature reaches 50°C-55°C.

[0095] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present application, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. An energy storage converter, characterized in that: include: The box body has a receiving cavity, and a first opening and a second opening communicating with the receiving cavity; a liquid cooling plate disposed in the accommodating cavity, wherein the liquid cooling plate is provided with a flow channel for the flow of cooling liquid, and a first cooling space and a second cooling space formed on the flow channel; the liquid cooling plate is connected to a liquid inlet pipe and a liquid outlet pipe, one end of the liquid inlet pipe is communicated with the first end of the flow channel, the other end of the liquid inlet pipe passes through the accommodating cavity through the first opening, one end of the liquid outlet pipe is communicated with the second end of the flow channel, and the other end of the liquid outlet pipe passes through the accommodating cavity through the second opening; a circuit board assembly connected to the liquid cooling plate and located on one side of the liquid cooling plate, the circuit board assembly including a circuit board and a first heating device and a second heating device electrically connected to the circuit board, the first heating device being attached to the liquid cooling plate and facing the first cooling space, and the second heating device being attached to the liquid cooling plate and facing the second cooling space; There are multiple first heating devices, which are attached to the liquid cooling plate in the same direction and face the same first cooling space. The first cooling space is provided with a guide groove; the second cooling space is staggered with the first cooling space in the thickness direction of the liquid cooling plate; The first cooling space has a plurality of inlets and an outlet, and the coolant enters the first cooling space from the plurality of inlets from the periphery thereof and is discharged from the center bottom of the first cooling space through the outlet; There is a gap between the liquid cooling plate and the inner surface of the box in the thickness direction. The space on the installation side of the liquid cooling plate is used to install the circuit board assembly. The space on the non-installation side of the liquid cooling plate forms a reserved area. The liquid cooling plate is provided with a through hole that penetrates the liquid cooling plate in the thickness direction. The through hole is used to provide a channel for air convection on both sides of the liquid cooling plate. The liquid cooling plate comprises a first edge and a second edge which are arranged opposite to each other, a plurality of first heating devices are arranged along the first edge, and a liquid inlet pipeline and a liquid outlet pipeline are connected to the second edge.

2. The energy storage converter according to claim 1, characterized in that: The liquid cooling plate includes a base plate and a cover plate. The base plate includes a flow channel area that is recessed from one side toward the other side to form the flow channel, forming a first area of ​​the first cooling space, and a second area of ​​the second cooling space. The cover plate is connected to the base plate and covers the flow channel area, the first area, and the second area. The first heating device and the second heating device are attached to the cover plate.

3. The energy storage converter according to claim 2, characterized in that: The area of ​​the first region is greater than that of the second region.

4. The energy storage converter according to claim 1, characterized in that: A plurality of diversion structures corresponding to the plurality of first heating components are provided in the first cooling space, and the diversion structures are used to allow the cooling liquid to flow along the arrangement direction of the plurality of first heating components.

5. The energy storage converter according to claim 4, characterized in that: The diversion structure includes a plurality of ribs spaced apart from each other, each of the ribs extending along an arrangement direction of the plurality of first heating elements, and an arrangement direction of the plurality of ribs being perpendicular to an arrangement direction of the plurality of first heating elements.

6. The energy storage converter according to claim 1, characterized in that: There are a plurality of the second heating devices and a plurality of the second cooling spaces, and the plurality of the second heating devices are arranged in a one-to-one correspondence with the plurality of the second cooling spaces.

7. The energy storage converter according to claim 6, characterized in that: A plurality of spoiler columns are provided in each of the second cooling spaces, and the spoiler columns are distributed in an array in the second cooling space.

8. The energy storage converter according to claim 6, characterized in that: The plurality of second cooling spaces include a plurality of first subspaces and a plurality of second subspaces. The plurality of first subspaces and the plurality of second subspaces correspond to each other one by one. Each first subspace is spaced apart from the corresponding second subspace and is connected to each other.

9. The energy storage converter according to claim 8, characterized in that: At least part of the plurality of first subspaces is in communication with the first cooling space.

10. The energy storage converter according to claim 1, characterized in that: A partition is provided in the flow channel. The extending direction of the partition is the same as the extending direction of the flow channel. The partition is provided with a notch facing the first cooling space or the second cooling space.

11. The energy storage converter according to claim 1, characterized in that: There are a plurality of through holes, and the plurality of through holes are distributed between the first cooling space and the second cooling space.

12. The energy storage converter according to claim 1, characterized in that: The flow channel includes a liquid inlet flow channel, a liquid outlet flow channel, and a series flow channel. One end of the liquid inlet flow channel is connected to the liquid inlet pipeline, and the other end of the liquid inlet flow channel is connected to the first cooling space. One end of the liquid outlet flow channel is connected to the liquid outlet pipeline, and the other end of the liquid outlet flow channel is connected to the second cooling space. The series flow channel connects the first cooling space and the second cooling space.

13. The energy storage converter according to claim 1, characterized in that: The liquid inlet channel and the liquid outlet channel are located on opposite sides of the first cooling space or the second cooling space.

14. The energy storage converter according to claim 1, characterized in that: It also includes a liquid detection component, which is arranged in the accommodating cavity and adjacent to the liquid inlet pipeline or the liquid outlet pipeline.

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