Energy storage bidirectional converter

Abstract

The embodiment of the present disclosure relates to the technical field of energy storage, and provides a kind of energy storage bidirectional converter, comprising: bottom plate and electrical device and multiple current conversion devices on bottom plate, multiple current conversion devices include first current conversion device and second current conversion device, first current conversion device is located between electrical device and second current conversion device;First, second liquid cooling plate is located between first current conversion device and bottom plate, between second current conversion device and bottom plate respectively;Total liquid inlet pipe, one end of first liquid inlet pipe and second liquid inlet pipe are communicated, first liquid inlet pipe is communicated with first liquid cooling plate, second liquid inlet pipe is communicated with second liquid cooling plate, the ratio of the pipe diameter of first liquid inlet pipe and total liquid inlet pipe is 0.5-0.62, the ratio of the pipe diameter of second liquid inlet pipe and total liquid inlet pipe is 0.5-0.77;Total liquid outlet pipe, one end of first liquid outlet pipe and second liquid outlet pipe are communicated, first liquid outlet pipe and second liquid outlet pipe are communicated with first liquid cooling plate and second liquid cooling plate respectively.The embodiment of the present disclosure can at least improve the uniformity of heat dissipation effect of each area of energy storage bidirectional converter.

Description

Technical Field

[0001] This disclosure relates to the field of energy storage technology, and in particular to a bidirectional energy storage converter. Background Technology

[0002] As a key control device in battery energy storage systems, the bidirectional converter can better solve charging and discharging control problems, improving the system's control accuracy and lifespan. The long-term normal operation of the bidirectional converter directly affects the overall efficiency of the energy storage system; therefore, the heat dissipation performance of the bidirectional converter is becoming increasingly important. It is also crucial to ensure that the temperature differences between different parts of the electronic components within the bidirectional converter are not too large, as significant temperature variations can negatively impact the lifespan of both the bidirectional converter and the entire energy storage system.

[0003] Therefore, how to set the heat dissipation method of the bidirectional energy storage converter to achieve a more uniform heat dissipation effect in all areas of the bidirectional energy storage converter is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] This disclosure provides an energy storage bidirectional converter, which at least helps to improve the uniformity of heat dissipation in different areas of the energy storage bidirectional converter.

[0005] According to some embodiments of this disclosure, an energy storage bidirectional converter package is provided, comprising: a base plate; an electrical device located on the base plate; a plurality of converter devices arranged on the base plate along a first direction and located on one side of the electrical device along the first direction, the plurality of converter devices including a first converter device and a second converter device, the first converter device being located between the electrical device and the second converter device; a first liquid cooling plate located between the first converter device and the base plate; a second liquid cooling plate located between the second converter device and the base plate; and a main liquid inlet pipe located at least on the base plate on the side of the electrical device facing the converter device. The main liquid inlet pipe is used for the inflow of liquid cooling medium. One end of the main liquid inlet pipe is connected to a first liquid inlet pipe and a second liquid inlet pipe. The first liquid inlet pipe is connected to the first liquid cooling plate, and the second liquid inlet pipe is connected to the second liquid cooling plate. The ratio of the diameter of the first liquid inlet pipe to the diameter of the main liquid inlet pipe is 0.5-0.62, and the ratio of the diameter of the second liquid inlet pipe to the diameter of the main liquid inlet pipe is 0.5-0.77. The main liquid outlet pipe is located on the bottom plate and is used for the outflow of the liquid cooling medium. One end of the main liquid outlet pipe is connected to a first liquid outlet pipe and a second liquid outlet pipe. The first liquid outlet pipe is connected to the first liquid cooling plate, and the second liquid outlet pipe is connected to the second liquid cooling plate.

[0006] In some embodiments, the diameter of the first inlet pipe is smaller than the diameter of the second inlet pipe.

[0007] In some embodiments, the diameter of the main inlet pipe is 20mm-35mm, the diameter of the first inlet pipe is 10mm-21.7mm, and the diameter of the second inlet pipe is 10mm-26.95mm.

[0008] In some embodiments, the electrical device includes a housing and a plurality of heating elements, the housing and the base plate facing the housing forming a receiving area, and the plurality of heating elements being located in the receiving area; the energy storage bidirectional converter further includes: a third liquid cooling plate located inside the housing, the third liquid cooling plate being offset from the heating elements along a direction perpendicular to the bottom surface of the base plate; and a wind power device, the wind power device being disposed opposite to the third liquid cooling plate.

[0009] In some embodiments, the energy storage bidirectional converter further includes: two fixing plates disposed opposite each other along a second direction, the two fixing plates being located on the same side of the first liquid cooling plate along the second direction and extending along the thickness direction of the base plate, the two fixing plates and the base plate forming a receiving area, the receiving area being used to receive the second liquid inlet pipe, the fixing plates having a through hole penetrating the fixing plates along the second direction; wherein, the second direction is perpendicular to the first direction; and a cable tie, the cable tie being used to pass through the through hole and wrap around the second liquid inlet pipe to fix the second liquid inlet pipe in the receiving area.

[0010] In some embodiments, the second outlet pipe includes a first portion located on the side of the first liquid cooling plate facing a second direction, the outlet of the first liquid cooling plate and the first portion being located on the same side of the first liquid cooling plate, and the first outlet pipe communicating between the outlet of the first liquid cooling plate and the first portion, wherein the second direction is perpendicular to the first direction. In some embodiments, the inlet and outlet of the first liquid cooling plate are located on the side of the first liquid cooling plate facing the electrical device, or the inlet and outlet of the first liquid cooling plate are diagonally arranged, the inlet communicating with the first inlet pipe, and the outlet communicating with the first outlet pipe.

[0011] In some embodiments, the first liquid inlet pipe is connected to the liquid inlet of the first liquid cooling plate using an IP68 terminal block, and the first liquid outlet pipe is connected to the liquid outlet of the first liquid cooling plate using an IP68 terminal block.

[0012] In some embodiments, the energy storage bidirectional converter further includes: two vertical beams, which are respectively fixed to opposite ends of the base plate along the first direction, and the vertical beams extend along a second direction, which is perpendicular to the first direction; and a horizontal beam, which extends on the base plate along the first direction, passes through the first liquid cooling plate and the second liquid cooling plate, and the two ends of the horizontal beam are respectively fixed to the vertical beams.

[0013] In some embodiments, the crossbeam has a hollow region extending along the first direction, the second liquid inlet pipe is located in the hollow region, and both ends of the second liquid inlet pipe penetrate the crossbeam and are respectively connected to the main liquid inlet pipe and the second liquid cooling plate.

[0014] The technical solutions provided in this disclosure have at least the following advantages:

[0015] The bidirectional energy storage converter provided in this embodiment has a first liquid-cooled plate disposed between a first converter and a base plate, and a second liquid-cooled plate disposed between a second converter and a base plate. The first converter is located between the electrical device and the second converter, and is connected to the first liquid-cooled plate via a first liquid inlet pipe, the second liquid inlet pipe, the first liquid-cooled plate, the main liquid inlet pipe, and the main liquid inlet pipe. The first liquid-cooled plate is connected to the main liquid outlet pipe via a first liquid outlet pipe, and the second liquid outlet pipe is connected to the main liquid outlet pipe. The separate placement of the first and second liquid-cooled plates improves the convenience of disassembling and maintaining the liquid-cooled plates. The first and second liquid-cooled plates respectively receive liquid cooling medium through the first and second liquid inlet pipes, which facilitates the separate control of the cooling medium flow pipes to regulate the heat dissipation capacity of the first and second converters, thereby improving the uniformity of heat dissipation in different areas of the bidirectional energy storage converter. The ratio of the diameter of the first inlet pipe to the diameter of the total inlet pipe is 0.5-0.62, and the ratio of the diameter of the second outlet pipe to the diameter of the total inlet pipe is 0.5-0.77. The diameters of the first and second inlet pipes are both no greater than the diameter of the total inlet pipe and no less than half of the diameter of the total inlet pipe. This ensures that the flow rate of the liquid cooling medium in the first and second inlet pipes is relatively fast, resulting in a higher flow rate of the liquid cooling medium at the inlets of the first and second liquid cooling plates. The higher flow rate of the liquid cooling medium can increase the liquid cooling rate, thereby giving the bidirectional energy storage converter a better heat dissipation effect.

[0016] Furthermore, within the aforementioned range of the two pipe diameter ratios, there exists a situation where the diameter of the first inlet pipe is smaller than that of the second inlet pipe. Since the second liquid cooling plate is farther from the main inlet pipe than the first liquid cooling plate, the energy loss of the liquid cooling medium flowing in the second inlet pipe is greater than that of the first inlet pipe. By setting the diameter of the first inlet pipe to be smaller than that of the second inlet pipe, the flow rate of the liquid cooling medium in the first inlet pipe is less than that in the second inlet pipe. This helps to balance the losses generated when the liquid cooling medium flows in the first and second inlet pipes respectively, thereby ensuring a more uniform heat dissipation effect on the first and second converter devices. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this disclosure or the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of an energy storage bidirectional converter provided in some embodiments of the present disclosure;

[0019] Figure 2 for Figure 1 A schematic diagram showing the positions of the first liquid cooling plate, the second liquid cooling plate, the main liquid inlet pipe, and the main liquid outlet pipe on the bottom plate of the corresponding bidirectional energy storage converter.

[0020] Figure 3 A schematic diagram showing the positions of a first liquid inlet pipe, a second liquid inlet pipe, a first liquid outlet pipe, and a second liquid outlet pipe on the bottom plate of an energy storage bidirectional converter provided in an embodiment of this disclosure;

[0021] Figure 4 This is a schematic diagram showing another position of the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe, and the second liquid outlet pipe on the bottom plate of the bidirectional energy storage converter provided in this embodiment of the disclosure;

[0022] Figure 5 A schematic diagram showing the position of the fixing plate on the bottom plate of the bidirectional energy storage converter provided in this embodiment of the disclosure;

[0023] Figure 6 This is a schematic diagram showing another position of the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe, and the second liquid outlet pipe on the bottom plate of the bidirectional energy storage converter provided in this embodiment of the disclosure. Detailed Implementation

[0024] As can be seen from the background technology, the heat dissipation method of current energy storage bidirectional converters needs to be improved.

[0025] The bidirectional energy storage converter provided in this embodiment improves the convenience of disassembling and maintaining the liquid cooling plates by respectively equipping them with a first liquid cooling plate and a second liquid cooling plate. The first liquid cooling plate and the second liquid cooling plate obtain liquid cooling medium through the first liquid inlet pipe and the second liquid inlet pipe, respectively. This facilitates the regulation of the heat dissipation capacity of the pipes through which the liquid cooling medium flows to the first converter and the second converter, thereby improving the uniformity of heat dissipation effect in each area of ​​the bidirectional energy storage converter. The ratio of the diameter of the first liquid inlet pipe to the diameter of the total liquid inlet pipe is 0.5-0.62, and the ratio of the diameter of the second liquid outlet pipe to the diameter of the total liquid inlet pipe is 0.5-0.77. The diameters of the first and second liquid inlet pipes are both no greater than the diameter of the total liquid inlet pipe and no less than 1 / 2 of the diameter of the total liquid inlet pipe. This ensures that the liquid cooling medium in the first and second liquid inlet pipes has a relatively fast flow rate, resulting in a larger flow rate of the liquid cooling medium at the inlets of the first and second liquid cooling plates. The larger flow rate of the liquid cooling medium can increase the liquid cooling rate, thereby giving the energy storage bidirectional converter a better heat dissipation effect.

[0026] Furthermore, within the aforementioned range of the two pipe diameter ratios, there exists a situation where the diameter of the first inlet pipe is smaller than that of the second inlet pipe. In this case, the flow rate of the liquid cooling medium in the first inlet pipe is less than that in the second inlet pipe, which helps to balance the losses generated when the liquid cooling medium flows in the first and second inlet pipes respectively, thereby ensuring a more uniform heat dissipation effect on the first converter and the second converter.

[0027] In the description of the embodiments of this disclosure, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "multiple" means two or more, unless otherwise explicitly defined. Similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple pieces" refers to two or more pieces (including two pieces).

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] In the description of the embodiments of this disclosure, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "level," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this disclosure. For example, if the device or element in the illustration is inverted, then the element described as "below," "under," "below," or "bottom" of other elements or features will be oriented "above" or "top" of said other elements or features. Therefore, the term "below" may cover both above and below orientation depending on the context in which the term is used, as will be apparent to those skilled in the art. Materials may be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatial relative descriptive terms used herein may be interpreted accordingly.

[0031] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0032] In the accompanying drawings corresponding to the embodiments of this disclosure, the thickness and area of ​​the layers are enlarged for better understanding and ease of description. Furthermore, when describing a component as "generally" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor on a portion of the edge of the entire surface.

[0033] In the description of the embodiments of this disclosure, when a component "includes" another component, other components are not excluded unless otherwise stated, and may be further included. The formation or placement of a second component above or on a first component, or on the surface of a first component, or on one side of a first component, may include embodiments where the first and second components are in direct contact, and may also include embodiments where an additional component may be placed between the first and second components, thereby preventing direct contact between the first and second components. For simplicity and clarity, various components may be drawn at different scales. In the drawings, some layers / components may be omitted for simplicity. Unless otherwise specified, the formation or placement of a second component on the surface of a first component refers to direct contact between the first and second components. The term "component" can refer to a layer, film, region, portion, structure, etc.

[0034] The terminology used in the description of the various embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments and the appended claims, the term "component" is also intended to include the plural form unless the context clearly indicates otherwise. Components include layers, films, regions, or plates, etc.

[0035] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this disclosure to facilitate a better understanding of the disclosure. However, the technical solutions claimed in this disclosure can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0036] Figure 1 This is a three-dimensional structural diagram of an energy storage bidirectional converter provided in some embodiments of this disclosure. Figure 2 for Figure 1 A schematic diagram showing the positions of the first liquid cooling plate, the second liquid cooling plate, the main inlet pipe, and the main outlet pipe on the bottom plate of the corresponding bidirectional energy storage converter.

[0037] Reference Figure 1 and Figure 2 The energy storage bidirectional converter includes: base plate 100.

[0038] The energy storage bidirectional converter includes an electrical device 101 located on a base plate 100.

[0039] The energy storage bidirectional converter includes multiple converter devices, which are arranged on the base plate 100 along the first direction X and located on one side of the electrical device 101 along the first direction X. The multiple converter devices include a first converter device 102a and a second converter device 102b, with the first converter device 102a located between the electrical device 101 and the second converter device 102b.

[0040] The energy storage bidirectional converter includes a first liquid cooling plate 103, located between the first converter device 102a and the base plate 100;

[0041] The energy storage bidirectional converter includes a second liquid cooling plate 104, located between the second converter 102b and the base plate 100;

[0042] The energy storage bidirectional converter includes a main liquid inlet pipe 105, which is located at least on the base plate 100 on the side of the electrical equipment facing the converter. The main liquid inlet pipe 105 is used for the inflow of liquid cooling medium. One end of the main liquid inlet pipe 105 is connected to a first liquid inlet pipe 106 and a second liquid inlet pipe 107. The first liquid inlet pipe 106 is connected to a first liquid cooling plate 103, and the second liquid inlet pipe 107 is connected to a second liquid cooling plate 104. The ratio of the diameter of the first liquid inlet pipe 106 to the diameter of the main liquid inlet pipe 105 is 0.5-0.62, and the ratio of the diameter of the second liquid inlet pipe 107 to the diameter of the main liquid inlet pipe 105 is 0.5-0.77.

[0043] The energy storage bidirectional converter includes a main liquid outlet pipe 108 located on the base plate 100. The main liquid outlet pipe 108 is used to discharge liquid cooling medium. One end of the main liquid outlet pipe 108 is connected to a first liquid outlet pipe 109 and a second liquid outlet pipe 110. The first liquid outlet pipe 109 is connected to the first liquid cooling plate 103, and the second liquid outlet pipe 110 is connected to the second liquid cooling plate 104.

[0044] By separately providing a first liquid cooling plate 103 and a second liquid cooling plate 104, the convenience of disassembling and maintaining the liquid cooling plates is improved. The first liquid cooling plate 103 and the second liquid cooling plate 104 obtain liquid cooling medium through the first liquid inlet pipe 106 and the second liquid inlet pipe 107, respectively. This facilitates the regulation of the heat dissipation capacity of the pipes through which the liquid cooling medium flows to the first converter 102a and the second converter 102b, thereby improving the uniformity of heat dissipation effect in each area of ​​the energy storage bidirectional converter. The ratio of the diameter of the first inlet pipe 106 to the diameter of the total inlet pipe 105 is 0.5-0.62, and the ratio of the diameter of the second outlet pipe 110 to the diameter of the total inlet pipe 105 is 0.5-0.77. Thus, the diameters of the first inlet pipe 106 and the second inlet pipe 107 are both no greater than the diameter of the total inlet pipe 105 and no less than half the diameter of the total inlet pipe 105. Since the flow rate is proportional to the rate of liquid heat transfer, increasing the flow rate can increase the rate of liquid cooling. This arrangement ensures that the liquid cooling medium in the first inlet pipe 106 and the second inlet pipe 107 has a relatively fast flow rate, resulting in a larger flow rate of the liquid cooling medium at the inlets of the first liquid cooling plate 103 and the second liquid cooling plate 104. A larger flow rate of liquid cooling medium can increase the liquid cooling rate, thereby giving the energy storage bidirectional converter a better heat dissipation effect.

[0045] The ratio of the diameter of the first inlet pipe 106 to the diameter of the main inlet pipe 105 can be 0.5, 0.53, 0.55, 0.58, 0.6, or 0.62. The ratio of the diameter of the second inlet pipe 107 to the diameter of the main inlet pipe 105 can be 0.5, 0.54, 0.57, 0.6, 0.64, 0.68, 0.7, 0.74, or 0.77.

[0046] The material of the base plate 100 may include, but is not limited to, stainless steel, aluminum alloy, or titanium alloy. It should be noted that the material and dimensions of the base plate 100 can be designed according to the number and size of the electronic devices carried on the base plate 100, and this embodiment does not impose specific limitations in this regard.

[0047] The first liquid cooling plate can be composed of a top plate and four side plates. The four side plates are fixed around the top plate. The top plate and the bottom plate are arranged opposite each other. The top plate, the four side plates and the first liquid cooling plate form a liquid cooling medium channel corresponding to the bottom plate. The liquid cooling medium channel is used as a channel for the liquid cooling medium.

[0048] The first liquid cooling plate may also include a liquid cooling base plate, which is fixed to the base plate by a connecting part, and a sealing ring is fitted on the connecting part. The sealing ring is pressed between the base plate and the end of the connecting part facing the top plate to prevent leakage of the liquid cooling medium.

[0049] The first liquid cooling plate may be provided with multiple straight fins (not shown). The straight fins are used to divide the liquid cooling medium channel below the first liquid cooling plate into multiple sub-channels to reduce the friction resistance of the liquid cooling medium channel.

[0050] The specific structural design of the second liquid cooling plate can be referred to the specific structural design of the first liquid cooling plate mentioned above, and will not be described in detail below.

[0051] In some embodiments, the connection between the converter 102 and the base plate 100 includes, but is not limited to, bolt connection, snap-fit ​​connection or pin connection.

[0052] The converter device may include IGBT (Insulated Gate Bipolar Transistor) modules and inductors. In some embodiments, the first liquid cooling plate 103 and the second liquid cooling plate 104 are mainly used to provide heat dissipation for the IGBT modules in the corresponding converter devices, so the size of the first liquid cooling plate 103 can be no smaller than the size of the IGBT module in the first converter device 102a, and the size of the second liquid cooling plate 104 can be no smaller than the size of the IGBT module in the second converter device 102b. In some embodiments, the first liquid cooling plate 103 and the second liquid cooling plate 104 can also be used to provide heat dissipation for the IGBT modules and inductors in the corresponding converter devices. The sizes of the first liquid cooling plate 103 and the second liquid cooling plate 104 can be set according to the sizes of the IGBT modules and inductors in the corresponding converter devices.

[0053] The electrical device 101 can be an electronic component such as a converter or a high-voltage box installed in the energy storage bidirectional converter. By setting the electrical device 101 as a high-voltage box, and using the housing area to house the converter, this embodiment of the disclosure can install the high-voltage box and multiple energy storage bidirectional converters on the same base plate 100. The high-voltage box can be electrically connected to multiple energy storage bidirectional converters on the same base plate 100, thereby reducing the number of high-voltage boxes required for the energy storage system and thus reducing the volume of the energy storage bidirectional converter.

[0054] The connection between the electrical device 101 and the base plate 100 includes, but is not limited to, bolt connection, snap-fit ​​connection or pin connection.

[0055] The bidirectional energy storage converter provided in this disclosure can be applied to an energy storage system. The energy storage system can include multiple battery clusters, each electrically connected to a high-voltage box. Each battery cluster can be connected to a converter via a high-voltage box. The high-voltage box controls the charging and discharging of the battery clusters and detects the voltage, current, and temperature of the battery clusters. The converter can perform AC / DC conversion, directly supplying power to AC loads in the absence of a power grid. Specifically, the high-voltage box is connected to a DC / DC module, which boosts the battery voltage to the DC bus voltage before connecting it to the converter. The DC / DC module can achieve bidirectional DC power transfer based on closed-loop control of DC-side current / power commands. The converter output is three-phase four-wire. The bidirectional energy storage converter converts the battery voltage into power output. The output of the bidirectional energy storage converter is connected to a grid-connected switch, which is connected to the grid connection point via an external cable, enabling the low-voltage distribution substation energy storage system to operate both on and off the grid. Simultaneously, voltage can also be input from the grid, converted by the converter, and then used by the DC / DC module and high-voltage box to charge the batteries in the battery clusters.

[0056] refer to Figure 2 In some embodiments, the second liquid inlet pipe 107 may include a second part 17, a third part 27, and a fourth part 37 connected sequentially along the first direction X. The second part 17 is connected to the main liquid inlet pipe 105, the fourth part 37 is connected to the second liquid cooling plate 104, and the third part 27 is located on the side of the first liquid cooling plate 103 facing the second direction Y, which is perpendicular to the first direction X. With this configuration, the second liquid inlet pipe 107 does not flow through the first liquid cooling plate 103, which is the main area for heat dissipation of the first converter device 102a. By ensuring that the second liquid inlet pipe 107 does not flow through the first liquid cooling plate 103, the cooling loss of the liquid cooling medium in the second liquid inlet pipe 107 before flowing into the second liquid cooling plate 104 can be minimized. This ensures a smaller temperature difference between the liquid cooling medium in the liquid cooling medium channels of the first liquid cooling plate 103 and the second liquid cooling plate 104, thereby ensuring the uniformity of the heat dissipation effect for different converter devices.

[0057] For example, the first liquid cooling plate 103 can be located between the IGBT module in the first converter device 102a and the base plate 100. By setting the third part 27 to be located on the side of the first liquid cooling plate 103 facing the second direction, the third part 37 avoids the IGBT module in the first converter device 102a, so that the cooling loss of the liquid cooling medium in the second liquid inlet pipe 107 before flowing into the second liquid cooling plate 104 is less. As a result, the temperature difference of the liquid cooling medium in the liquid cooling medium channel of the first liquid cooling plate 103 and the second liquid cooling plate 104 is smaller, so as to ensure the uniformity of the heat dissipation effect on different converter devices.

[0058] The ratio of the diameter of the first liquid inlet pipe 106 to the diameter of the second liquid inlet pipe 107 can be 0.65 to 1. Within this range, the difference between the diameters of the first liquid inlet pipe 106 and the second liquid inlet pipe 107 will not be too large or too small, thereby ensuring that the heat dissipation effect of the liquid cooling medium flowing into the first liquid cooling plate 103 and the second liquid cooling plate 104 is small, so as to achieve a relatively balanced heat dissipation effect for the first converter device 102a and the second converter device 102b.

[0059] The diameter of the main inlet pipe 105 can be 20mm-35mm. For example, the diameter of the main inlet pipe 105 can be 20mm, 24mm, 28mm, 30mm, 32mm or 35mm.

[0060] The diameter of the first inlet pipe 106 can be 10mm-21.7mm. For example, the diameter of the first inlet pipe 106 can be 10mm, 14mm, 16.5mm, 18mm, 20.7mm or 21.7mm.

[0061] The diameter of the second inlet pipe 107 can be 10mm-26.95mm. For example, the diameter of the second inlet pipe 107 can be 10mm, 15mm, 17mm, 20.5mm, 22.7mm, 25.5mm or 26.95mm.

[0062] Within the aforementioned pipe diameter range, the diameters of the first liquid inlet pipe 106 and the second liquid inlet pipe 107 will not be too small, facilitating the manufacture of the first liquid inlet pipe 106 and the second liquid inlet pipe 107. Furthermore, the diameters of the first liquid inlet pipe 106 and the second liquid inlet pipe 107 will not be too large, ensuring a relatively large flow rate of the liquid cooling medium in the first liquid inlet pipe 106 and the second liquid inlet pipe 107.

[0063] refer to Figure 2 The diameter of the first liquid inlet pipe 106 can be equal to the diameter of the second liquid inlet pipe 107. The diameters of both the first and second liquid inlet pipes 106 and 107 are not less than half the diameter of the total liquid inlet pipe 105, and are both smaller than the diameter of the total liquid inlet pipe 105. This arrangement ensures a relatively high flow velocity of the liquid cooling medium in both the first and second liquid inlet pipes 106 and 107. The high flow velocity of the liquid cooling medium provides better heat dissipation for both the first converter device 102a and the second converter device 102b.

[0064] In some embodiments, the first liquid inlet pipe 106 and the liquid inlet of the first liquid cooling plate 103 can be connected using an IP68 terminal block (not shown), and the first liquid outlet pipe 109 and the liquid outlet of the first liquid cooling plate 103 can be connected using an IP68 terminal block. Connecting the first liquid inlet pipe 106 and the liquid inlet of the first liquid cooling plate 103 using IP68 terminal blocks, and connecting the first liquid outlet pipe 109 and the liquid outlet of the first liquid cooling plate 103 using IP68 terminal blocks, can prevent leakage of the cooling medium at the liquid inlet and outlet of the first liquid cooling plate 103.

[0065] In some embodiments, the second liquid inlet pipe 107 and the liquid inlet of the second liquid cooling plate 104 can also be connected by an IP68 terminal block, and the second liquid outlet pipe 110 and the liquid outlet of the second liquid cooling plate 104 can also be connected by an IP68 terminal block.

[0066] In some embodiments, the inlet and outlet of the first liquid cooling plate 103 can be located on the side of the first liquid cooling plate 103 facing the electrical device 101. The inlet of the first liquid cooling plate 103 is used to communicate with the first liquid inlet pipe 106, and the outlet of the first liquid cooling plate 103 is used to communicate with the first liquid outlet. This is beneficial to reducing the length of the first liquid inlet pipe 106 connecting the inlet of the first liquid cooling plate 103 and the main liquid inlet pipe 105, and reducing the length of the first liquid outlet pipe 109 connecting the outlet of the first liquid cooling plate 103 and the main liquid outlet pipe 108.

[0067] The length of the first inlet pipe 106 refers to the length of the liquid cooling medium in the direction of flow in the first inlet pipe 106, and the length of the first outlet pipe 109 refers to the length of the liquid cooling medium in the direction of flow in the first outlet pipe 109.

[0068] The second liquid inlet pipe 107 and the second liquid outlet pipe 110 are located on opposite sides of the second liquid cooling plate 104 along the second direction Y. The liquid inlet and liquid outlet of the second liquid cooling plate 104 are located on opposite sides of the second liquid cooling plate 104 along the second direction. The liquid inlet of the second liquid cooling plate 104 and the second liquid inlet pipe 107 are located on the same side of the second liquid cooling plate 104 along the second direction. The second direction is perpendicular to the first direction. Thus, by setting the liquid inlet of the second liquid cooling plate 104 and the second liquid inlet pipe 107 on the same side of the second liquid cooling plate 104, it is beneficial to shorten the length of the second liquid inlet pipe 107. Similarly, setting the liquid outlet of the second liquid cooling plate 104 and the second liquid outlet pipe 110 on the same side of the second liquid cooling plate 104, it is beneficial to shorten the length of the second liquid outlet pipe 110. This saves on the length of the second liquid inlet pipe 107 and the second liquid outlet pipe 110. Furthermore, by setting the second liquid inlet pipe 107 and the second liquid outlet pipe 110 on both sides of the second liquid cooling plate 104, it is beneficial to increase the distance between the second liquid inlet pipe 107 and the second liquid outlet pipe 110, thereby reducing the possibility of heat transfer from the second liquid outlet pipe 110 to the second liquid inlet pipe 107. This ensures that the liquid cooling medium flowing into the second liquid cooling plate 104 from the second liquid inlet pipe 107 has a better heat dissipation function.

[0069] It should be noted that the length of the second inlet pipe 107 refers to the length of the second inlet pipe 107 along the flow direction of the liquid cooling medium, and the length of the second outlet pipe 110 refers to the length of the second outlet pipe 110 along the flow direction of the liquid cooling medium.

[0070] Figure 3 This is a schematic diagram showing the positions of a first liquid inlet pipe, a second liquid inlet pipe, a first liquid outlet pipe, and a second liquid outlet pipe on the bottom plate of an energy storage bidirectional converter provided in an embodiment of this disclosure. Figure 3 The structure shown is Figure 2 The structures shown are largely the same, the main difference being that... Figure 3 The diameter of the first inlet pipe is smaller than the diameter of the second inlet pipe.

[0071] It is understandable that, since the second liquid cooling plate 104 is farther away from the main liquid inlet pipe 105 than the first liquid inlet pipe 106, the energy loss of the liquid cooling medium when flowing in the second liquid inlet pipe 107 is greater than that of the first liquid inlet pipe 106.

[0072] refer to Figure 3 The diameter of the first inlet pipe 106 is smaller than the diameter of the second inlet pipe 107. This arrangement ensures that the flow rate of the liquid cooling medium in the first inlet pipe 106 is less than the flow rate of the liquid cooling medium in the second inlet pipe 107. This helps to balance the losses generated when the liquid cooling medium flows in the first inlet pipe 106 and the second inlet pipe 107 respectively, thereby ensuring a more uniform heat dissipation effect on the first converter device 102a and the second converter device 102b.

[0073] Reference Figure 1 and Figure 3 In some embodiments, the main inlet pipe 105 and the main outlet pipe 108 are not only located on the side of the electrical device facing the first converter, but also between the electrical device 101 and the base plate. The main inlet pipe 105 and the main outlet pipe 108 can be connected to the piping structure outside the energy storage bidirectional converter. By placing the main inlet pipe 105 and the main outlet pipe 108 between the electrical device 101 and the base plate 100, heat dissipation can be achieved for the electrical device 101.

[0074] Figure 4 This is a schematic diagram showing another position of the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe, and the second liquid outlet pipe on the bottom plate of the bidirectional energy storage converter provided in the embodiments of this disclosure. Figure 4 The structure shown is Figure 3 They are largely the same, the difference being that... Figure 4 In the structure shown, the energy storage bidirectional converter also includes a crossbeam and a vertical beam.

[0075] refer to Figure 4 The energy storage bidirectional converter may further include: two vertical beams 111, which are respectively fixed to opposite ends of the base plate 100 along a first direction X, and extend along a second direction Y, which is perpendicular to the first direction X; and a horizontal beam 112, which extends along the first direction X on the base plate 100, passes through a first liquid cooling plate 103 and a second liquid cooling plate 104, and whose ends are respectively fixed to the vertical beams 111. The horizontal beam 112 is used to increase the deformation resistance of the base plate 100.

[0076] In some examples, the base plate may also be provided with two or more vertical beams, which are spaced apart on the base plate along the first direction. Two vertical beams are fixed to opposite ends of the base plate along the first direction, and the remaining vertical beams are used to divide the base plate into multiple sub-base plates. The multiple sub-base plates and adjacent vertical beams can be used to form multiple accommodating areas that respectively accommodate multiple converter devices.

[0077] In some embodiments, the crossbeam has a hollow region (not shown) extending along a first direction, and a second liquid inlet pipe is located in the hollow region. Both ends of the second liquid inlet pipe pass through the crossbeam and are respectively connected to the main liquid inlet pipe and the second liquid cooling plate. In this way, on the one hand, the crossbeam can play a heat insulation role to reduce the heat transfer from the first converter to the second liquid inlet pipe. On the other hand, it can reduce the overall base plate area occupied by the first converter, the second liquid inlet pipe, and the first liquid cooling plate, thereby facilitating the design of a smaller energy storage bidirectional converter.

[0078] Continue to refer to Figure 4In some embodiments, the inlet and outlet of the first liquid cooling plate 103 can be arranged diagonally. This increases the distance between the inlet and outlet of the first liquid cooling plate 103, thereby increasing the distance between the first inlet pipe 106 and the first outlet pipe 109. This reduces the possibility of heat transfer from the first outlet pipe 109 to the first inlet pipe 106, ensuring that the liquid cooling medium flowing into the first liquid cooling plate 103 from the first inlet pipe 106 has better heat dissipation function.

[0079] It should be noted that liquid cooling plates can be installed between multiple converters and the base plate. The inlets and outlets of the multiple liquid cooling plates can be arranged diagonally to ensure that the distance between the corresponding inlet pipes and the main outlet pipe of the multiple liquid cooling plates is relatively large. This reduces the possibility of heat transfer from the main outlet pipe to the corresponding inlet pipe, thus ensuring that the liquid cooling medium provides better heat dissipation for the multiple converters.

[0080] In some embodiments, the second liquid outlet pipe 110 may include a first portion located on the side of the first liquid cooling plate 103 facing the second direction Y. The liquid outlet of the first liquid cooling plate 103 and the first portion are located on the same side of the first liquid cooling plate 103. The first liquid outlet pipe 109 connects the liquid outlet of the first liquid cooling plate 103 and the first portion, and the second direction is perpendicular to the first direction. Thus, by placing the liquid outlet of the first liquid cooling plate 103 and the first portion on the same side of the first liquid cooling plate 103, and the first liquid outlet pipe 109 located between the liquid outlet of the first liquid cooling plate 103 and the first portion, it is beneficial to shorten the length of the first liquid outlet pipe 109 and save material used to manufacture the main liquid outlet pipe 108.

[0081] Figure 5 This is a schematic diagram showing the position of the fixing plate on the bottom plate of the bidirectional energy storage converter provided in this embodiment of the present disclosure. Figure 5 The structure shown is Figure 4 The structures shown are largely the same, with the main difference being: Figure 5 In the energy storage bidirectional converter shown, a fixing plate is installed on the base plate.

[0082] refer to Figure 4 and Figure 5In some embodiments, the bidirectional energy storage converter may further include two fixed plates 113 arranged opposite each other along a second direction. The two fixed plates 113 are located on the same side of the first liquid cooling plate 103 along the second direction and extend along the thickness direction of the base plate 100. The two fixed plates 113 and the base plate 100 form a receiving area, which is used to receive the second liquid inlet pipe 107. In this way, the two fixed plates 113 can fix the second liquid inlet pipe 107 and separate the third part from the first converter device 102a. The fixed plate 113 located between the second liquid inlet pipe 107 and the first converter device 102a can play a certain heat insulation role, so that the temperature increase of the liquid cooling medium flowing through the second liquid inlet pipe 107 is small, so as to ensure that the temperature difference of the liquid cooling medium in the liquid cooling medium channel of the first liquid cooling plate 103 and the second liquid cooling plate 104 is small, thereby making the heat dissipation effect of different receiving areas more uniform.

[0083] It should be noted that, Figure 5 The fixed plate located between the second liquid inlet pipe 107 and the first liquid cooling plate 103 is shown in perspective.

[0084] The fixing plate also has a through hole extending through the fixing plate in a second direction; the converter may further include a cable tie (not shown), which is used to pass through the through hole and wrap around the second inlet pipe 107 to fix the second inlet pipe 107 in the receiving area. The cable tie can further fix the second inlet pipe 107.

[0085] In some embodiments, a fixing plate may also be provided on both sides of the first part along the second direction. The two fixing plates extend on the base plate along the thickness direction of the base plate and form a receiving area with the base plate. The receiving area is used to receive the first part of the second liquid outlet pipe. The first liquid outlet pipe may also be connected between the liquid outlet of the first liquid cooling plate and the first part. The first liquid outlet pipe also passes through the fixing plate to communicate with the liquid outlet of the first liquid cooling plate.

[0086] It should be noted that more than two converter devices can be installed on the base plate 100. In addition to the first converter device 102a and the second converter device 102b, the remaining converter devices are located between the first converter device 102a and the second converter device. The specific configuration of the liquid cooling plate corresponding to the remaining converter device can refer to the specific configuration of the second liquid cooling plate 104. The specific configuration of the liquid inlet pipe and liquid outlet pipe corresponding to the liquid cooling plate on the remaining converter device can refer to the specific configuration of the second liquid inlet pipe 107 and the second liquid outlet pipe 110.

[0087] Figure 6 This is a schematic diagram showing another position of the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe, and the second liquid outlet pipe on the bottom plate of the bidirectional energy storage converter provided in this embodiment of the disclosure. Figure 6 The energy storage bidirectional converter shown is Figure 3The energy storage bidirectional converters shown are largely the same, with the main difference being... Figure 6 The energy storage bidirectional converter shown also includes a third liquid cooling plate.

[0088] refer to Figure 6 In some embodiments, the energy storage bidirectional converter may further include a third liquid cooling plate 114, which is located between the electrical device 101 and the base plate 100. The third liquid cooling plate 114 connects the main liquid inlet pipe 105 with the first liquid inlet pipe 106 and the main liquid inlet pipe 105 with the second liquid inlet pipe 107. The third liquid cooling plate 114 also connects the main liquid outlet pipe 108 with the first liquid outlet pipe 109 and the main liquid outlet pipe 108 with the second liquid outlet pipe 110. The third liquid cooling plate 114 can provide better liquid cooling for the electrical device 101.

[0089] In some embodiments, the electrical device may include a housing and multiple heating elements. The housing and a base plate 100 facing the housing form a receiving area, and the multiple heating elements are located in the receiving area (not shown). A third liquid cooling plate is located inside the housing, and along a direction perpendicular to the bottom surface of the base plate 100, the third liquid cooling plate is offset from the heating elements. A fan is also present, positioned opposite to the third liquid cooling plate. Since the electrical device has lower heat dissipation requirements compared to the converter, the third liquid cooling plate, offset from the heating elements, avoids direct contact, thus slowing down heat exchange between the third liquid cooling plate and the heating elements. Simultaneously, the fan accelerates the cooling of the heating elements within the receiving area, ensuring good heat dissipation for the electrical device under the combined action of the third liquid cooling plate and the fan. The fan also lowers the temperature of the liquid cooling medium within the third liquid cooling plate, reducing cold loss during flow and ensuring good heat dissipation for the converter.

[0090] The electrical equipment can be a high-voltage box, and the heating elements include relays, DC circuit breakers, etc.

[0091] The bidirectional energy storage converter provided in the aforementioned embodiment, by respectively providing a first liquid cooling plate 103 and a second liquid cooling plate 104, facilitates the disassembly, assembly, and maintenance of the liquid cooling plates. The first liquid cooling plate 103 and the second liquid cooling plate 104 are respectively connected to the main liquid inlet pipe 105 by the first liquid inlet pipe 106 and the second liquid inlet pipe 107, and the first liquid cooling plate 103 and the second liquid cooling plate 104 are respectively connected to the main liquid outlet pipe 108 by the first liquid outlet pipe 109 and the second liquid outlet pipe 110. This facilitates the regulation of the cooling medium flow through the pipes to dissipate heat from the first converter device 102a and the second converter device 102b, thereby improving the uniformity of heat dissipation effect in each area of ​​the bidirectional energy storage converter.

[0092] The ratio of the diameter of the first inlet pipe 106 to the diameter of the total inlet pipe 105 is 0.5-0.62, and the ratio of the diameter of the second outlet pipe 110 to the diameter of the total inlet pipe 105 is 0.5-0.77. Thus, the diameters of the first inlet pipe 106 and the second inlet pipe 107 are not greater than the diameter of the total inlet pipe 105, and are not less than 1 / 2 of the diameter of the total inlet pipe 105. This ensures that the liquid cooling medium in the first inlet pipe 106 and the second inlet pipe 107 has a relatively fast flow rate, resulting in a larger flow rate of the liquid cooling medium at the inlets of the first liquid cooling plate 103 and the second liquid cooling plate 104. The larger flow rate of the liquid cooling medium can increase the liquid cooling rate, thereby giving the energy storage bidirectional converter a better heat dissipation effect.

[0093] In addition, the diameter of the first liquid inlet pipe 106 can be set to be smaller than that of the second liquid inlet pipe 107, so that the flow rate of the liquid cooling medium in the first liquid inlet pipe 106 is less than that in the second liquid inlet pipe 107. This helps to balance the losses generated when the liquid cooling medium flows in the first liquid inlet pipe 106 and the second liquid inlet pipe 107 respectively, so as to ensure that the heat dissipation effect of the first converter 102a and the second converter 102b is more uniform.

[0094] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of this disclosure. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this disclosure; therefore, the scope of protection of this disclosure should be determined by the scope defined in the claims.

Claims

1. An energy storage bidirectional converter, characterized by, The energy storage bidirectional converter comprises a bottom plate, an electrical device on the bottom plate, a plurality of current conversion devices arranged along a first direction on the bottom plate and located on one side of the electrical device along the first direction, the plurality of current conversion devices comprising a first current conversion device and a second current conversion device, the first current conversion device being located between the electrical device and the second current conversion device, a first liquid cooling plate between the first current conversion device and the bottom plate, a second liquid cooling plate between the second current conversion device and the bottom plate, a total liquid inlet pipe on the bottom plate at least on the side of the electrical device towards the current conversion devices, the total liquid inlet pipe being used for flowing in liquid cooling medium, one end of the total liquid inlet pipe being communicated with a first liquid inlet pipe and a second liquid inlet pipe, the first liquid inlet pipe being communicated with the first liquid cooling plate, the second liquid inlet pipe being communicated with the second liquid cooling plate, the ratio of the pipe diameter of the first liquid inlet pipe to the pipe diameter of the total liquid inlet pipe being 0.5-0.62, the ratio of the pipe diameter of the second liquid inlet pipe to the pipe diameter of the total liquid inlet pipe being 0.5-0.77, a total liquid outlet pipe on the bottom plate, the total liquid outlet pipe being used for flowing out the liquid cooling medium, one end of the total liquid outlet pipe being communicated with a first liquid outlet pipe and a second liquid outlet pipe, the first liquid outlet pipe being communicated with the first liquid cooling plate, the second liquid outlet pipe being communicated with the second liquid cooling plate. The electrical device comprises a shell and a plurality of heat generating elements, the shell and the bottom plate opposite to the shell forming an accommodation area, and the plurality of heat generating elements being located in the accommodation area. The pipe diameter of the first liquid inlet pipe is smaller than the pipe diameter of the second liquid inlet pipe. The pipe diameter of the total liquid inlet pipe is 20-35 mm, the pipe diameter of the first liquid inlet pipe is 10-21.7 mm, and the pipe diameter of the second liquid inlet pipe is 10-26.95 mm. The energy storage bidirectional converter further comprises two fixing plates oppositely arranged along a second direction, the two fixing plates being located on the same side of the first liquid cooling plate along the second direction and extending along the thickness direction of the bottom plate on the bottom plate, the two fixing plates and the bottom plate forming an accommodation area for accommodating the second liquid inlet pipe, the fixing plate having a through hole penetrating through the fixing plate along the second direction. The second liquid outlet pipe comprises a first part on the side of the first liquid cooling plate towards the second direction, the liquid outlet of the first liquid cooling plate and the first part being located on the same side of the first liquid cooling plate, the first liquid outlet pipe being communicated between the liquid outlet of the first liquid cooling plate and the first part, and the second direction being perpendicular to the first direction. The second liquid outlet pipe comprises a first part on the side of the first liquid cooling plate towards the second direction, the liquid outlet of the first liquid cooling plate and the first part being located on the same side of the first liquid cooling plate, the first liquid outlet pipe being communicated between the liquid outlet of the first liquid cooling plate and the first part, and the second direction being perpendicular to the first direction. ​ ​ 2. The energy storage bidirectional converter of claim 1, wherein, ​ 3. The energy storage bidirectional converter of claim 1, wherein, ​ 4. The energy storage bidirectional converter of claim 1, wherein, ​ ​ 5. The energy storage bidirectional converter of claim 1, wherein, ​ 6. The energy storage bidirectional converter of claim 1, wherein, The liquid inlet and the liquid outlet of the first liquid cooling plate are located on the side of the first liquid cooling plate facing the electrical device, or the liquid inlet and the liquid outlet of the first liquid cooling plate are diagonally arranged, the liquid inlet is used for being communicated with the first liquid inlet pipe, and the liquid outlet is used for being communicated with the first liquid outlet pipe.

7. The energy storage bidirectional converter of claim 1, wherein, The first liquid inlet pipe and the liquid inlet of the first liquid cooling plate are connected through an IP68 terminal, and the first liquid outlet pipe and the liquid outlet of the first liquid cooling plate are connected through an IP68 terminal.

8. The energy storage bidirectional converter of claim 1, wherein, The energy storage bidirectional converter further comprises: Two vertical beams, the two vertical beams are respectively fixed to the opposite ends of the bottom plate along the first direction, and the vertical beams extend along a second direction, the second direction being perpendicular to the first direction; A cross beam, the cross beam extending along the first direction on the bottom plate, the cross beam penetrating the first liquid cooling plate and the second liquid cooling plate, and the two ends of the cross beam being respectively fixed to the vertical beams.

9. The energy storage bidirectional converter of claim 8, wherein, The cross beam has a hollow area extending along the first direction, the second liquid inlet pipe being located in the hollow area, and the two ends of the second liquid inlet pipe penetrating the cross beam and being respectively communicated with the total liquid inlet pipe and the second liquid cooling plate.

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