Power conversion device and energy storage device

Abstract

The present application relates to the field of energy storage technologies, and particularly to a power conversion device and an energy storage device. In an embodiment of the present application, the power conversion device at least includes a liquid cooling component, a first device, an air flow generating component, and a radiator, and the radiator includes at least one pipe. By providing the liquid cooling component, the first device can be cooled. By connecting the interior of the pipe to the cooling channel of the liquid cooling component, a liquid flow path is formed in which the liquid in the cooling channel can flow into the pipe through the inlet of the pipe and flow out of the pipe through the outlet of the pipe, so that the pipe located on the first side of the liquid cooling component can be cooled by the liquid in the cooling channel. Since the radiator is located on the air flow path generated by the air flow generating component, the air flow generated by the air flow generating component can be cooled via the pipe, thereby cooling a plurality of first devices on the first side of the liquid cooling component, and further improving the thermal management effect of the power conversion device.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and particularly to a power conversion device and an energy storage device. Background Art

[0002] With the development of the new energy industry, the power of the power conversion device has been continuously improved, and the power consumption of the components inside the power conversion device has also been continuously increased, resulting in an increase in the heat generation of the components. Therefore, how to improve the thermal management effect of the power conversion device is an urgent problem to be solved. Summary of the Invention

[0003] Based on this, it is necessary to provide a power conversion device and an energy storage device to improve the thermal management effect of the power conversion device.

[0004] According to one aspect of the present application, an embodiment of the present application provides a power conversion device, including a liquid cooling component, a plurality of first components, an air flow generating component, and a radiator. The liquid cooling component has a cooling channel, and the liquid cooling component has a first side and a second side oppositely arranged in a first direction. The plurality of first components and the air flow generating component are arranged on the first side. The radiator is arranged on the first side and is located on the air flow path generated by the air flow generating component. The radiator includes at least one pipe. The inlet and the outlet of the pipe are both communicatively connected with the cooling channel in a matching manner, so that the liquid in the cooling channel can flow into the pipe through the inlet of the pipe and flow out of the pipe through the outlet of the pipe.

[0005] In some embodiments, there are a plurality of pipes; along the extending direction of the air flow path generated by the air flow generating component, all the pipes are arranged at intervals.

[0006] In some embodiments, along the extending direction of the air flow path generated by the air flow generating component, at least a part of two adjacent pipes is arranged in a staggered manner.

[0007] In some embodiments, the radiator further includes a heat dissipation part, and the pipe is connected to the heat dissipation part.

[0008] In some embodiments, at least a part of the pipe penetrates through the heat dissipation part.

[0009] In some embodiments, the pipe includes a plurality of extending segments arranged at intervals, and at least one connecting segment; the plurality of extending segments are connected in series by means of at least one connecting segment; along the series connection direction of the plurality of extending segments, the inlet of the first extending segment is the inlet of the pipe, and the outlet of the last extending segment is the outlet of the pipe; at least one connecting segment extends out of the heat dissipation part in the first direction.

[0010] In some embodiments, the extending segment extends linearly in the first direction; or, the extending segment extends spirally in the first direction.

[0011] In some embodiments, the connecting segment is configured as an arc transition segment; or, the connecting segment is configured to be spirally extended along the extension direction of the connecting segment.

[0012] In some embodiments, the heat dissipation portion includes at least one row of a plurality of heat dissipation fins spaced apart along a first direction, and each row of heat dissipation fins defines a spacing channel; the inlet side of the airflow generating element is connected to one side of the heat dissipation portion, and the inlet of the airflow generating element is communicated with the spacing channel.

[0013] In some embodiments, the cooling channel includes a first channel section and a second channel section that are independent of each other; the first channel section is connected to the inlet of the cooling channel, and the second channel section is connected to the outlet of the cooling channel; the inlet of the pipeline is connected to the first channel section, and the outlet of the pipeline is connected to the second channel section.

[0014] In some embodiments, the first channel section is configured to have a first buffer section, and the inlet of the pipeline is connected to the first buffer section; and / or the second channel section is configured to have a second buffer section, and the outlet of the pipeline is connected to the second buffer section.

[0015] In some embodiments, the power conversion device further includes a first spoiler structure disposed in the first channel section; and / or the power conversion device further includes a second spoiler structure disposed in the second channel section.

[0016] In some embodiments, the cooling channel also includes a third channel segment, and the orthographic projections of the plurality of first devices on a reference plane have an overlapping portion with the orthographic projection of the third channel segment on the reference plane, and the reference plane is a plane perpendicular to the first direction; the first channel segment, the second channel segment and the third channel segment are connected in series in sequence.

[0017] In some embodiments, the power conversion device also includes a shell; the shell has a accommodating cavity, the liquid cooling component is arranged in the accommodating cavity, the first side of the liquid cooling component and the cavity wall of the accommodating cavity define the accommodating cavity, and a plurality of first devices, airflow generating components and a heat sink are arranged in the accommodating cavity; a plurality of airflow generating components are provided, and all of the airflow generating components are configured to be able to generate an annular airflow arranged around an axis in the accommodating cavity, the radiator is located on the path of the annular airflow, and the extension direction of the axis and the first direction are parallel to each other.

[0018] In some embodiments, the power conversion device also includes a shell and a circuit board assembly; the shell has a accommodating cavity, the liquid cooling component is arranged in the accommodating cavity, the first side of the liquid cooling component and the cavity wall of the accommodating cavity define the accommodating cavity, and a plurality of first components, an airflow generating component, a heat sink and a circuit board assembly are arranged in the accommodating cavity; the circuit board assembly includes a circuit board and a second component arranged on the circuit board, the circuit board is spaced apart from the first side of the liquid cooling component and defines an airflow channel; a part of the outlet of the airflow generating component is arranged corresponding to the airflow channel, and the other part is arranged corresponding to the side of the circuit board away from the liquid cooling component.

[0019] In some embodiments, along the extension direction of the cooling channel, the heat sink is arranged closer to the inlet of the cooling channel than to the outlet of the cooling channel; and / or, the cooling channel includes a buffer cavity connected to the outlet of the cooling channel.

[0020] In some embodiments, the first side of the liquid cooling component includes multiple installation areas, and the power conversion device also includes multiple temperature averaging plates, the multiple temperature averaging plates are arranged in a one-to-one correspondence with the multiple installation areas, and the temperature averaging plates are arranged in the corresponding installation areas; the multiple temperature averaging plates are arranged in a one-to-one correspondence with at least some of the multiple first devices, and the corresponding first devices are installed on the side of the temperature averaging plates facing away from the liquid cooling component.

[0021] According to another aspect of the present application, an embodiment of the present application provides an energy storage device, including the power conversion device in any of the above embodiments.

[0022] In the above-mentioned power conversion device and energy storage device, the power conversion device at least includes a liquid cooling component, a first device, an airflow generating component and a radiator, and the radiator includes at least one pipe. By setting the liquid cooling component, the first device can be cooled. By connecting the interior of the pipe with the cooling channel of the liquid cooling component, the liquid in the cooling channel can flow into the pipe through the inlet of the pipe and flow out of the pipe from the outlet of the pipe, so that the pipe located on the first side of the liquid cooling component can be cooled by the liquid in the cooling channel. Since the radiator is located on the airflow path generated by the airflow generating component, the airflow generated by the airflow generating component can be cooled through the pipe, so that the multiple first devices on the first side of the liquid cooling component can be cooled, thereby further improving the thermal management effect of the power conversion device.

[0023] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the embodiments below. The accompanying drawings are only for the purpose of illustrating the embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of a power conversion device in some embodiments of the present application;

[0026] Figure 2 A schematic diagram of a three-dimensional structure of a power conversion device in some embodiments of the present application with a portion of the structure removed;

[0027] Figure 3 is Figure 2 a three-dimensional structural schematic diagram of removing a part of the structure from the shown structure;

[0028] Figure 4 is a three-dimensional structural schematic diagram of a liquid cooling component in some embodiments of the present application;

[0029] Figure 5 is Figure 4 a structural schematic diagram of the liquid cooling component showing the cooling channels;

[0030] Figure 6 is an exploded structural schematic diagram of a liquid cooling component in some embodiments of the present application;

[0031] Figure 7 is a structural schematic diagram of the first liquid cooling part of a liquid cooling component in some embodiments of the present application;

[0032] Figure 8 is a three-dimensional structural schematic diagram of a radiator in some embodiments of the present application;

[0033] Figure 9 is a three-dimensional structural schematic diagram of a radiator in some other embodiments of the present application;

[0034] Figure 10 is a three-dimensional structural schematic diagram of a radiator in some further embodiments of the present application;

[0035] Figure 11 is Figure 10 a front view structural schematic diagram of the shown radiator;

[0036] Figure 12 is a structural schematic diagram of a pipeline in some embodiments of the present application;

[0037] Figure 13 is a structural schematic diagram of a pipeline in some other embodiments of the present application;

[0038] Figure 14 is a structural schematic diagram of a pipeline in some further embodiments of the present application;

[0039] Figure 15 is a three-dimensional structural schematic diagram of the cooperation between a radiator and an air flow generating component in some embodiments of the present application;

[0040] Figure 16 is a three-dimensional structural schematic diagram of removing a part of the structure from a power conversion device in some other embodiments of the present application;

[0041] Figure 17 is a three-dimensional structural schematic diagram of the cooperation between a part of the structures of a radiator, an air flow generating component and a liquid cooling component in some embodiments of the present application;

[0042] Figure 18 A perspective structural view showing the mating of some structures of the radiator, the air flow generating space, and the liquid cooling component in other embodiments of the present application;

[0043] Figure 19 A structural view showing a first flow disturbing structure provided in a first channel section in some embodiments of the present application;

[0044] Figure 20 A structural view showing a second flow disturbing structure provided in a second channel section in some embodiments of the present application;

[0045] Figure 21 Is Figure 16 A perspective structural view of the structure shown with a part of the structure removed;

[0046] Figure 22 A schematic view of the projection relationship between a third channel section and a first device in some embodiments of the present application;

[0047] Figure 23 Is Figure 16 A top view structural view of

[0048] Figure 24 A structural view showing the cooperation of a circuit board assembly, an air flow generating member, a housing, and a liquid cooling component in some embodiments of the present application;

[0049] Figure 25 Is Figure 3 A structural view of the structure shown with some parts removed;

[0050] Figure 26 Is Figure 21 A structural view of the structure shown with some parts removed.

[0051] Explanation of reference numerals:

[0052] Power conversion device 100;

[0053] Liquid cooling component 110, first liquid cooling part 111, second liquid cooling part 112, cooling channel p1, first channel section p11, second channel section p12, third channel section p13, first side c1, second side c2, third side c3, fourth side c4, fifth side c5, sixth side c6, buffer cavity x, installation area z, corner q, concave part u;

[0054] First device 120;

[0055] Air flow generating member 130;

[0056] Radiator 140, pipe 141, extension section 1411, connection section 1412, heat dissipation part 142, heat sink 1421, spaced channel p2;

[0057] First flow disturbance structure 150;

[0058] Second flow disturbance structure 160;

[0059] Housing 170, first part 171, second part 172;

[0060] Circuit board assembly 180, circuit board 181, second device 182, air flow channel p3;

[0061] Heat pipe 190;

[0062] Liquid inlet connector J1, liquid outlet connector J2;

[0063] Reference plane E, first projection y1, second projection y2;

[0064] First direction F1, second direction F2, third direction F3. Detailed implementation

[0065] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0066] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0067] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0068] In this application, unless otherwise clearly defined and limited, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In this application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0070] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0071] According to some embodiments of the present application, please refer to Figures 1 to 3 , Figure 1 which is a three-dimensional structural schematic diagram of the power conversion device 100 in some embodiments of the present application, Figure 2 which is a three-dimensional structural schematic diagram of the power conversion device 100 in some embodiments of the present application with a part of the structure removed, Figure 3 is Figure 2A perspective structure diagram showing a part of the structure removed. An embodiment of the present application provides a power conversion device 100, including a liquid cooling component 110, a plurality of first devices 120, an air flow generating component 130, and a radiator 140.

[0072] With reference to Figure 4 and Figure 5 , Figure 4 This is a perspective structure diagram of the liquid cooling component 110 in some embodiments of the present application. Figure 5 is Figure 4 A structure diagram showing the cooling channel p1 in the liquid cooling component 110. In Figure 5 , the cooling channel p1 is schematically shown by a dotted line. The liquid cooling component 110 has a cooling channel p1, and the liquid cooling component 110 has a first side c1 and a second side c2 oppositely arranged along the first direction F1. The plurality of first devices 120 and the air flow generating component 130 are arranged on the first side c1. The radiator 140 is arranged on the first side c1 and is located on the air flow path generated by the air flow generating component 130. The radiator 140 includes at least one pipe 141. Both the inlet and the outlet of the pipe 141 are communicatively connected with the cooling channel p1 in a matching manner, so that the liquid in the cooling channel p1 can flow into the pipe 141 through the inlet of the pipe 141 and flow out of the pipe 141 through the outlet of the pipe 141.

[0073] The liquid cooling component 110 is a component used to perform heat exchange with the object to be cooled through the flow of a liquid medium. The cooling channel p1 is the structure of the channel inside the liquid cooling component 110 for guiding the flow of the liquid medium. The liquid medium flows in the cooling channel p1 and performs heat exchange with the heat source in contact with the liquid cooling component 110, thereby absorbing and carrying away the heat.

[0074] Exemplarily, please continue to refer to Figures 3 to 5 , in Figure 5 , since the cooling channel p1 is inside the liquid cooling component 110, it is schematically shown by a dotted line. The liquid cooling component 110 includes a first liquid cooling part 111 and a second liquid cooling part 112, and the first liquid cooling part 111 and the second liquid cooling part 112 are stacked along the first direction F1. The side of the first liquid cooling part 111 and the second liquid cooling part 112 facing each other defines the cooling channel p1. Among them, it can be that the part of the side of the first liquid cooling part 111 facing the second liquid cooling part 112 corresponding to the cooling channel p1 is recessed, or the part of the side of the second liquid cooling part 112 facing the first liquid cooling part 111 corresponding to the cooling channel p1 is recessed, or the parts of the sides of the first liquid cooling part 111 and the second liquid cooling part 112 facing each other are both provided with recessed parts. No specific limitation is made here.

[0075] Taking Figure 6 and Figure 7 as an example, Figure 6Schematic exploded view of the liquid cooling component 110 in some embodiments of the present application. Figure 7 Schematic view of the first liquid cooling part 111 of the liquid cooling component 110 in some embodiments of the present application, showing a situation where recessed portions are provided on both sides of the first liquid cooling part 111 and the second liquid cooling part 112 facing each other to form the cooling channel p1. It should be noted that Figure 6 and Figure 7 respectively show parts of the cooling channel p1.

[0076] The first device 120 refers to various electronic components, parts or assemblies that can be used to form an electronic device, a circuit system or other devices. The device can include capacitors, relays, transformers, Hall elements, IGBT (Insulated Gate Bipolar Transistor) modules, power tubes, etc., and no specific limitations are made here.

[0077] The air flow generating member 130 is a device capable of generating an air flow with certain parameters (such as flow rate, flow volume, pressure, etc.). Exemplarily, the air flow generating member 130 can be a fan.

[0078] The heat sink 140 is located on the air flow path generated by the air flow generating member 130, which means that the air flow generated by the air flow generating member 130 will pass through the heat sink 140. The heat sink 140 can include one pipe 141 or multiple pipes 141, and no specific limitations are made here. When the heat sink 140 includes multiple pipes 141, the inlet and outlet of each pipe 141 are communicatively connected in cooperation with the cooling channel p1.

[0079] Thus, by providing the liquid cooling component 110, the first device 120 can be cooled. By connecting the inside of the pipe 141 with the cooling channel p1 of the liquid cooling component 110, a liquid flow path is formed in which the liquid in the cooling channel p1 can flow into the pipe 141 through the inlet of the pipe 141 and flow out of the pipe 141 through the outlet of the pipe 141, so that the pipe 141 located on the first side c1 of the liquid cooling component 110 can be cooled by the liquid in the cooling channel p1. Since the heat sink 140 is located on the air flow path generated by the air flow generating member 130, the air flow generated by the air flow generating member 130 can be cooled through the pipe 141, thereby cooling the multiple first devices 120 on the first side c1 of the liquid cooling component 110, and further improving the thermal management effect of the power conversion device 100.

[0080] It can be understood that by providing a pipe 141 communicating with the cooling channel p1 of the liquid cooling component 110, the cooling capacity of the liquid in the cooling channel p1 can be utilized more fully. The air flow generated by the air flow generating component 130 passes through the pipe 141, and the cooling capacity of the liquid in the cooling channel p1 can be utilized by means of the pipe 141. The increase in the air flow velocity will increase the convective heat transfer coefficient, thereby accelerating the heat exchange between the air flow and the pipe 141, and further cooling the first side c1 of the liquid cooling component 110 by means of the air flow generated by the air flow generating component 130. In this way, the plurality of first devices 120 on the first side c1 of the liquid cooling component 110 can not only perform heat exchange with the liquid cooling component 110, but also perform heat exchange with the air flow generated by the air flow generating component 130, thereby improving the heat management effect.

[0081] According to some embodiments of the present application, please continue to refer to Figure 2 and Figure 3 and, in combination with reference to Figure 8 Figure 8 FIG. 11 is a perspective structural view of a radiator 140 in some embodiments of the present application, and a plurality of pipes 141 are provided. Along the extending direction of the air flow path generated by the air flow generating component 130, all the pipes 141 are arranged at intervals.

[0082] The pipe 141 may be provided with two, three or other numbers. Exemplarily, taking Figure 2 , Figure 3 and Figure 8 as an example, the case where the pipe 141 is provided with two is illustrated.

[0083] Since all the pipes 141 are arranged at intervals, the air flow can more fully contact each pipe 141, and the cooling capacity of the pipe 141 can be utilized to the greatest extent. When the air flow flows between the pipes 141, it can fully perform heat exchange with the surface of the pipe 141, so that the cooling capacity in the pipe 141 is fully utilized, and the cooling efficiency is improved.

[0084] According to some embodiments of the present application, please refer to Figure 9 , Figure 9 FIG. 12 is a perspective structural view of a radiator 140 in some other embodiments of the present application. Along the extending direction of the air flow path generated by the air flow generating component 130, at least a part of two adjacent pipes 141 are arranged in a staggered manner.

[0085] Since at least a portion of two adjacent pipes 141 is offset, the originally relatively regular flow pattern of the air flow can be disrupted, causing more disturbances to the air flow when it passes through the pipes 141. Such disturbances increase the contact opportunity and contact time between the air flow and the surface of the pipes 141. At the same time, the offset setting causes a partial non - coincidence of the projections of two adjacent pipes 141 in the direction perpendicular to the air flow direction, which is equivalent to increasing the total contact area between the air flow and the pipes 141 within a certain space. Thus, not only can the contact opportunity and contact time between the air flow and the surface of the pipes 141 be increased, but also the total contact area between the air flow and the pipes 141 is increased, which is beneficial to improving the heat exchange effect between the air flow and the radiator 140. In addition, at least a portion of two adjacent pipes 141 being offset also helps to guide the air flow to flow more evenly through the two pipes, reducing the phenomenon of air flow deviation or short - circuit, which is beneficial to the air flow flowing on one side of the first side c1 of the liquid - cooling component 110, and further beneficial to the air flow cooling the related components in contact with it.

[0086] Of course, in some other embodiments, along the extension direction of the air flow path generated by the air flow generating member 130, two adjacent pipes 141 may not be offset. In this way, it is beneficial for the installation and manufacture of the radiator 140.

[0087] According to some embodiments of the present application, please refer to Figure 10 and Figure 11 , Figure 10 which is a three - dimensional structural schematic diagram of the radiator 140 in some other embodiments of the present application, Figure 11 and Figure 10 is the front - view structural schematic diagram of the radiator 140 shown. The radiator 140 further includes a heat - dissipating portion 142, and the pipes 141 are connected to the heat - dissipating portion 142.

[0088] The heat - dissipating portion 142 can be a component for cooperating with the pipes 141 to achieve heat exchange with the air flow. The heat - dissipating portion 142 can be a component that is easy to conduct heat transfer, or a component for defining a channel that is beneficial for the air flow to pass through the pipes 141, and no specific limitation is made here.

[0089] By providing the heat - dissipating portion 142 on the pipes 141, the cold quantity of the liquid in the pipes 141 can be transferred to the heat - dissipating portion 142. In this way, the contact area for heat exchange with the air flow can be increased, which is beneficial to more fully cooling the air flow and improving the heat exchange effect.

[0090] According to some embodiments of the present application, please continue to refer to Figure 10 and Figure 11 , at least a portion of the pipes 141 penetrates through the heat - dissipating portion 142.

[0091] Since at least a part of the pipe 141 is disposed through the heat dissipation part 142, the cooling capacity in the pipe 141 can be transferred to the heat dissipation part 142 more directly and quickly. In this way, the path of the cooling capacity transfer is shorter, which is more conducive to more fully cooling the air flow. In addition, this structural design in which the pipe 141 and the heat dissipation part 142 cooperate does not require additional space for connecting and arranging the pipe 141 and the heat dissipation part 142, so a more compact space layout can be achieved.

[0092] According to some embodiments of the present application, please continue to refer to Figure 10 and Figure 11 , and in combination with reference to Figure 12 , Figure 12 is a schematic structural diagram of the pipe 141 in some embodiments of the present application. The pipe 141 includes a plurality of extension segments 1411 arranged at intervals, and at least one connection segment 1412. The plurality of extension segments 1411 are connected in series by means of at least one connection segment 1412. Along the series connection direction of the plurality of extension segments 1411, the inlet of the first extension segment 1411 is the inlet of the pipe 141, and the outlet of the last extension segment 1411 is the outlet of the pipe 141. At least one connection segment 1412 extends out of the heat dissipation part 142 along the first direction F1.

[0093] The extension segments 1411 constitute the main part of the pipe 141, and the connection segment 1412 is a structure for connecting all the extension segments 1411 in series. The number of connection segments 1412 is related to the number of extension segments 1411, as long as all the extension segments 1411 can be connected in series, and no specific limitation is made here. For example, when there are two extension segments 1411, there is one connection segment 1412. Another example is Figure 12 for example, when there are four extension segments 1411, there are three connection segments 1412. Among them, the first extension segment 1411 and the last extension segment 1411 are both connected to the first side c1 of the liquid cooling component 110.

[0094] The plurality of extension segments 1411 are connected in series by means of at least one connection segment 1412, which means that the plurality of extension segments 1411 are connected end to end in sequence through at least one connection segment 1412, so that the liquid can flow into from the inlet of the first extension segment 1411, pass through each extension segment 1411 in sequence, and finally flow out from the outlet of the last extension segment 1411. In this way, the liquid can flow orderly in the pipe 141.

[0095] When the airflow passes through the connecting section 1412 extending out of the heat dissipation part 142, the connecting section 1412 can play a role in dividing the airflow, so as to generate more turbulence and eddy currents in the airflow, break the airflow boundary layer, increase the contact area and contact time between the airflow and the connecting section 1412 and the heat dissipation part 142, and make the heat transfer more sufficient. At the same time, the airflow divided by the connecting section 1412 extending out of the heat dissipation part 142 can be mixed with each other, making the temperature distribution more uniform, so as to be conducive to the airflow to dissipate heat from components such as the first device 120 located on the first side c1 of the liquid cooling component 110. In addition, such a pipe 141 structure can increase the length of the pipe 141 and extend the time for the liquid to flow through the pipe 141 in a limited space. When the first direction F1 is parallel to the gravity direction, the liquid also needs to overcome the gravity of the liquid when flowing in the pipe 141, so as to further extend the time for the liquid to flow through the pipe 141, and further extend the heat exchange time. Therefore, such a pipe 141 design can further improve the heat exchange effect.

[0096] According to some embodiments of the present application, please continue to refer to Figure 10 and Figure 11 , a plurality of connecting sections 1412 are provided, and all the connecting sections 1412 are distributed on both sides of the heat dissipation part 142 along the first direction F1, and the number of the connecting sections 1412 on both sides of the heat dissipation part 142 along the first direction F1 is different.

[0097] In this way, the airflow can be divided by the connecting section 1412 on both sides of the heat dissipation part 142 along the first direction F1. Since the number of the connecting sections 1412 on both sides of the heat dissipation part 142 along the first direction F1 is different, when the airflow passes through the radiator 140, the airflow on both sides of the heat dissipation part 142 along the first direction F1 will be disrupted by different structures, forming a complex flow path, so as to generate more turbulence and disturbances, and further be conducive to enhancing the heat exchange effect.

[0098] According to some embodiments of the present application, please continue to refer to Figure 12 , the extension section 1411 extends linearly along the first direction F1.

[0099] In this way, such a simple structure makes the processing and manufacturing relatively easy, does not require special processing techniques and molds, and reduces the production cost and processing difficulty.

[0100] According to some embodiments of the present application, please refer to Figure 13 and Figure 14 , Figure 13 is a schematic structural diagram of the pipe 141 in some other embodiments of the present application, Figure 14 is a schematic structural diagram of the pipe 141 in some other embodiments of the present application, and the extension section 1411 extends spirally along the first direction F1.

[0101] "Spiral extension" means that the extension section 1411 extends along a spiral trajectory around a central axis. The extending direction of the central axis is parallel to the first direction F1. In this setting, the extension section 1411 continuously surrounds the central axis while advancing along the first direction F1. The spiral form can be left-handed or right-handed, which is not specifically limited herein.

[0102] The setting of spiral extension enables the extension section 1411 to have a larger surface area within a limited space. When the air flow passes through, it can contact the surfaces of more extension sections 1411. At the same time, the spiral shape will cause the air flow to be disturbed when passing through, forming a turbulent flow. This turbulent flow breaks the air flow boundary layer, reduces the thermal resistance, and makes the heat transfer more rapid and sufficient. In addition, by setting the extension section 1411 to be spirally extended, a longer length of the extension section 1411 can be achieved within a limited space, thereby further improving the heat exchange effect between the liquid in the extension section 1411 and the extension section 1411. When the first direction F1 is parallel to the gravity direction, during the process of the liquid rising or falling along the first direction F1 in the extension section 1411, the liquid can continuously contact the extension section 1411, and the heat exchange can be carried out more fully.

[0103] It should be noted that, taking Figure 13 and Figure 14 as examples, different forms of the extension section 1411 can be obtained by controlling the structure of the spiral extension of the extension section 1411, which is not specifically limited herein. In the Figure 13 illustrated situation, each part of the extension section 1411 is bent, and the spiral structure formed by the extension section 1411 is relatively tight, having a certain structural stability. When the air flow quickly passes through the extension section 1411, the flow path of the air flow is relatively stable. In the Figure 14 illustrated situation, the spiral structure formed by the extension section 1411 is relatively loose, and each part arranged on both sides of the extension section 1411 along the air flow passing direction extends in a straight line direction, which is beneficial to guiding the air flow into the gap formed by the extension section 1411, thereby facilitating the mixing of the air flow when passing through the extension section 1411 and helping to distribute the heat more evenly.

[0104] According to some embodiments of the present application, please continue to refer to Figure 12 , the connecting section 1412 is configured as an arc transition section.

[0105] By configuring the connecting section 1412 as an arc transition section, the buffering performance of the arc transition section can be utilized, enabling the liquid to flow more smoothly between two adjacent extension sections 1411. At the same time, when the air flow passes through the connecting section 1412, the air flow can be mixed with the air flow passing through the extension section 1411 and the heat dissipation part 142 under the guidance of the connecting section 1412, thereby further improving the heat exchange effect between the air flow and the radiator 140.

[0106] According to some embodiments of the present application, continue to refer to Figure 13 and Figure 14 , the connecting section 1412 is configured to extend spirally along the extending direction of the connecting section 1412.

[0107] "Spirally extending" means that the connecting section 1412 extends along a helical trajectory around a central axis. The central axis can be a straight line, and the extending direction of the central axis can be perpendicular to the first direction F1. The central axis can also be a curve. The connecting section 1412 extends in a spiral around the central axis. The spiral line continuously loops around the central straight line, and for each complete loop, it advances a certain distance along the direction of the central axis, and this advancing direction is the extending direction of the connecting section 1412 under the central axis. In this setting, the connecting section 1412 continuously loops around the central axis and advances along the extending direction of the connecting section 1412. The spiral can be left-handed or right-handed, and no specific limitation is made here.

[0108] By configuring the connecting section 1412 to extend spirally, not only can the length of the connecting section 1412 be increased, the heat exchange time between the liquid and the connecting section 1412 be prolonged, thereby improving the heat exchange effect between the pipeline 141 and the liquid in the pipeline 141, but also the airflow passing through the connecting section 1412 can be guided to promote the mixing of the airflow, thereby improving the heat exchange effect between the airflow and the pipeline 141.

[0109] According to some embodiments of the present application, please refer to Figure 15 and Figure 16 , Figure 15 FIG. 21 is a three-dimensional structural schematic diagram of the radiator 140 and the airflow generating member 130 cooperating with each other in some embodiments of the present application, Figure 16 FIG. 23 is a three-dimensional structural schematic diagram of the power conversion device 100 with some structures removed in some other embodiments of the present application. The heat dissipation part 142 includes at least one row of a plurality of heat dissipation fins 1421 arranged at intervals along the first direction F1, and each row of heat dissipation fins 1421 defines an interval channel p2. The inlet side of the airflow generating member 130 is connected to one side of the heat dissipation part 142, and the inlet of the airflow generating member 130 is communicated with the interval channel p2.

[0110] The heat dissipation fins 1421 can be provided with one row, two rows or other numbers of rows, and no specific limitation is made here. Taking Figure 15 as an example, the case where the heat dissipation fins 1421 are provided with two rows is illustrated.

[0111] In this way, the air flow entering the inlet side of the air flow generating member 130 will first pass through the spaced channels p2. That is, the heat sinks 1421 will divide the air flow entering the inlet side of the air flow generating member 130, enabling the air flow to contact each part of the radiator 140 more evenly and increasing the actual contact area between the air flow and the heat sinks 1421. More air flow contacting the surface of the heat sinks 1421 can accelerate the heat exchange between the radiator 140 and the air flow, thereby improving the overall heat dissipation efficiency. At the same time, the air flow divided by the heat sinks 1421 can better break the air flow boundary layer, reduce the thermal resistance, and further enhance the heat exchange effect.

[0112] It should be noted that the heat sinks 1421 can be configured as flat sheet-like structures, or as wavy sheet-like structures, or as inclined sheet-like structures. The sizes of the spaced channels p2 formed by all the heat sinks 1421 can be different from each other, or completely the same, or partially the same. No specific limitation is made here.

[0113] Exemplarily, along the direction from the liquid cooling component 110 to the radiator 140, the sizes of all the spaced channels p2 in the first direction F1 decrease in sequence. The direction from the liquid cooling component 110 to the radiator 140 and the first direction F1 are parallel to each other. Since the liquid needs to overcome gravity to flow into the pipe 141 and then flow out from the outlet of the pipe 141 after heat exchange with the pipe 141, compared with the part of the pipe 141 closer to the liquid cooling component 110, the liquid will stay in the part of the pipe 141 farther from the liquid cooling component 110 for a longer time, which is more conducive to the liquid and the pipe 141 to conduct more sufficient heat exchange. At the part of the pipe 141 farther from the liquid cooling component 110, after the air flow is divided by the heat sinks 1421 at this part, more small air flows are formed, which is more conducive to the air flow and the pipe 141 to conduct more sufficient heat exchange. Therefore, the heat exchange effect when the air flow passes through the radiator 140 can be improved as a whole.

[0114] According to some embodiments of the present application, the inlet side of the air flow generating member 130 is connected to one side of the heat dissipation part 142. The inlet of the air flow generating member 130 includes a first sub-inlet, a second sub-inlet, and a third sub-inlet arranged in sequence along the first direction F1. The second sub-inlet communicates between the first sub-inlet and the third sub-inlet. The first sub-inlet is arranged corresponding to one side of the radiator 140 along the first direction F1, the second sub-inlet is arranged corresponding to the spaced channels p2, and the third sub-inlet is arranged corresponding to the other side of the radiator 140 along the first direction F1.

[0115] In this way, the airflow generated by the airflow generating member 130 can be cut by the connecting sections 1412 and the heat dissipation fins 1421 extending out of both sides of the radiator 140 along the first direction F1, so that the airflow can exchange heat with the radiator 140 more fully before entering the inlet of the airflow generating member 130. This is not only beneficial to improving the cooling of the related devices on the first side c1 of the liquid cooling component 110 by the airflow, but also can extend the service life of the airflow generating member 130.

[0116] According to some embodiments of the present application, please continue to refer to Figure 5 and Figure 6 and, in combination with reference to Figure 17 and Figure 18 , Figure 17 FIG. 13 is a schematic perspective view of the cooperation of partial structures of the radiator 140, the airflow generating member 130, and the liquid cooling component 110 in some embodiments of the present application. Figure 18 FIG. 14 is a schematic perspective view of the cooperation of partial structures of the radiator 140, the airflow generating member, and the liquid cooling component 110 in some other embodiments of the present application. The cooling channel p1 includes independent first channel section p11 and second channel section p12. The first channel section p11 is communicated with the inlet of the cooling channel p1, and the second channel section p12 is communicated with the outlet of the cooling channel p1. The inlet of the pipe 141 is communicated with the first channel section p11, and the outlet of the pipe 141 is communicated with the second channel section p12.

[0117] The fact that the first channel section p11 and the second channel section p12 are independent means that the first channel section p11 and the second channel section p12 are physically separated from each other, and there is no direct communication path between the first channel section p11 and the second channel section p12. Since the inlet of the pipe 141 is communicated with the first channel section p11 and the outlet of the pipe 141 is communicated with the second channel section p12, the first channel section p11, the pipe 141, and the second channel section p12 form a series-connected structure. That is to say, the pipe 141 is connected between the first channel section p11 and the second channel section p12.

[0118] In this way, the liquid can flow orderly in the first channel segment p11, the pipeline 141, and the second channel segment p12. That is to say, the liquid will flow through the pipeline 141 between the inlet and the outlet of the cooling channel p1. After passing through the pipeline 141, the liquid will continue to flow in the cooling channel p1. In this way, the flow of the liquid in the pipeline 141 can be promoted, which is beneficial to the heat exchange between the liquid and the pipeline 141. Further, when the pipeline 141 is located upstream of the liquid cooling component 110 along the gravity direction, the liquid also needs to overcome gravity to flow in the pipeline 141. The residence time of the liquid in the pipeline 141 is extended, so that the liquid and the pipeline 141 have more sufficient time for heat exchange, improving the heat exchange efficiency and further enhancing the cooling effect. It can be understood that this series connection method and the way the liquid overcomes gravity to flow make the flow path of the liquid clearer, effectively reducing the flow dead ends and dead zones, which is beneficial to the flow of the liquid while conducting heat exchange.

[0119] According to some embodiments of the present application, a control valve is provided at the outlet of the second channel segment p12, and a temperature detection component is provided on the radiator 140. The temperature detection component is used to detect the temperature of the radiator 140. The control valve can control the opening degree of the outlet of the second channel segment p12 in response to the detection signal of the temperature detection component. In this way, the residence time and flow rate of the liquid in the pipeline 141 can be controlled by the control valve, so that the temperature of the radiator 140 can be adjusted, which is beneficial to regulating the temperature of the air flow generated by the air flow generating component 130 and realizing different heat dissipation requirements.

[0120] According to some embodiments of the present application, please continue to refer to Figure 5 、 Figure 6 、 Figure 17 and Figure 18 , the first channel segment p11 is configured to have a first buffer segment, and the inlet of the pipeline 141 is communicated with the first buffer segment.

[0121] The first buffer segment is a structure with a certain volume, which is used to adjust and buffer the flow state of the liquid. The first buffer segment can be formed by widening a part of the cooling channel p1, or can be an independent cavity connected to the cooling channel p1.

[0122] Since the first buffer segment can store a certain amount of fluid, it can store the excess fluid when the flow rate increases and release the stored fluid when the flow rate decreases, so that the flow rate in the cooling pipeline 141 remains relatively stable. Since the inlet of the pipeline 141 is communicated with the first buffer segment, it is beneficial to continuously input the liquid into the pipeline 141, which is further beneficial to continuously forcing the liquid to flow into the pipeline 141 through the inlet and flow out through the outlet of the pipeline 141, which is beneficial to continuously conducting heat management on the entire device.

[0123] According to some embodiments of the present application, please continue to refer to Figure 5 , Figure 6 , Figure 17 and Figure 18 , the second channel segment p12 is configured to have a second buffer segment, and the outlet of the pipe 141 communicates with the second buffer segment.

[0124] The second buffer segment is a structure with a certain volume, which is used to adjust and buffer the flow state of the liquid. The second buffer segment can be formed by widening a part of the cooling channel p1, or can be an independent cavity connected to the cooling channel p1.

[0125] The function of the second buffer segment can be understood by referring to the first buffer segment, and will not be elaborated here. Since the outlet of the pipe 141 communicates with the second buffer segment, when the liquid in the pipe 141 flows out, the second buffer segment can play a role in buffering the pressure, which is beneficial to improving the stability of the liquid flowing through the pipe 141.

[0126] Exemplarily, please continue to refer to Figure 5 , Figure 6 , Figure 17 and Figure 18 , the first channel is configured to have a first buffer segment, and the second channel segment p12 is configured to have a second buffer segment. In this way, the first buffer segment and the second buffer segment can cooperate with each other, so that the liquid at the inlet and outlet of the pipe 141 can be buffered, so that the liquid can continuously and more smoothly pass through the pipe 141, and thus can continuously exchange heat with the pipe 141.

[0127] It should be noted that the first buffer segment and the second buffer segment can be mainly formed on the first liquid cooling part 111, or can be mainly formed on the second liquid cooling part 112, or can be jointly formed by both the first liquid cooling part 111 and the second liquid cooling part 112. Taking Figure 17 and Figure 18 as an example, it is shown that there are two recessed parts provided on the second liquid cooling part 112, one of the recessed parts constitutes the first buffer segment, and the other recessed part constitutes the second buffer segment. In the Figure 17 and Figure 18 shown situation, and in combination with referring to Figure 5 , both the first buffer segment and the second buffer segment are formed by widening the corresponding parts on the cooling channel p1. In this way, the space on the side of the second liquid cooling part 112 away from the first liquid cooling part 111 can be utilized, and the first buffer segment and the second buffer segment with the required sizes can be formed. And it is also beneficial to arrange related components in the space on the side of the first liquid cooling part 111 away from the second liquid cooling part 112.

[0128] According to some embodiments of the present application, please refer to Figure 19 , Figure 19Schematic diagram of a first flow channel section p11 in some embodiments of the present application, in which a first flow disturbing structure 150 is provided. The power conversion device 100 further includes the first flow disturbing structure 150, and the first flow disturbing structure 150 is disposed in the first flow channel section p11.

[0129] By providing the first flow disturbing structure 150 in the first flow channel section p11, the flow state of the liquid flowing through the first flow channel section p11 is changed to form a turbulent flow, increasing the heat exchange area and heat exchange intensity of the liquid, thereby improving the heat exchange efficiency. Further, since the inlet of the pipe 141 is communicated with the first flow channel section p11, it is beneficial for the liquid to flow into the inlet of the pipe 141 more smoothly and continuously.

[0130] According to some embodiments of the present application, please refer to Figure 20 , Figure 20 Schematic diagram of a second flow channel section p12 in some embodiments of the present application, in which a second flow disturbing structure 160 is provided. The power conversion device 100 further includes the second flow disturbing structure 160, and the second flow disturbing structure 160 is disposed in the second flow channel section p12.

[0131] By providing the second flow disturbing structure 160 in the second flow channel section p12, the flow state of the liquid flowing through the second flow channel section p12 is changed to form a turbulent flow, increasing the heat exchange area and heat exchange intensity of the liquid, thereby improving the heat exchange efficiency. Further, since the outlet of the pipe 141 is communicated with the second flow channel section p12, it is beneficial for the liquid to flow out of the inlet of the pipe 141 more smoothly and continuously.

[0132] It should be noted that in the embodiments of the present application, the first flow disturbing structure 150 may be provided in the first flow channel section p11, and the second flow disturbing structure 160 may be provided in the second flow channel section p12. Exemplarily, the first flow disturbing structure 150 and the second flow disturbing structure 160 may be protrusions, grooves, baffles or spiral structures, etc., which are not specifically limited herein.

[0133] According to some embodiments of the present application, please continue to refer to Figure 3 and Figure 5 , and in combination with reference to Figure 21 and Figure 22 , Figure 21 is Figure 16 a three-dimensional structural schematic diagram of a part of the structure removed from the structure shown. Figure 22Schematic diagram of the projection relationship between the third channel segment p13 and the first device 120 in some embodiments of the present application. The cooling channel p1 further includes a third channel segment p13. The orthographic projections of the plurality of first devices 120 on the reference plane E and the orthographic projection of the third channel segment p13 on the reference plane E have an overlapping part. The reference plane E is a plane perpendicular to the first direction F1. The first channel segment p11, the second channel segment p12, and the third channel segment p13 are connected in series in sequence.

[0134] Exemplarily, with reference to Figure 22 , the orthographic projection of the plurality of first devices 120 on the reference plane E is the first projection y1, and the orthographic projection of the third channel segment p13 on the reference plane E is the second projection y2. The first projection y1 and the second projection y2 have an overlapping part. Specifically, taking Figure 22 as an example, the situation where the first projection y1 is within the range of the second projection y2 is schematically shown.

[0135] The orthographic projections of the plurality of first devices 120 and the third channel segment p13 on the reference plane E overlap, which means that the third channel segment p13 can cool the plurality of first devices 120 more directly. Since the cooling channel p1 is close to the first device 120, heat can be transferred from the device to the liquid in the cooling channel p1 more quickly, thereby improving the heat dissipation efficiency.

[0136] According to some embodiments of the present application, please continue to refer to Figures 1 to 3 , Figure 16 , and in combination with reference to Figure 23 , Figure 23 is a top view structural schematic diagram of Figure 16 . The power conversion device 100 further includes a housing 170. The housing 170 has a receiving cavity. The liquid cooling component 110 is disposed in the receiving cavity. The first side c1 of the liquid cooling component 110 and the cavity wall of the receiving cavity define a receiving cavity. A plurality of first devices 120, an air flow generating member 130, and a radiator 140 are disposed in the receiving cavity. A plurality of air flow generating members 130 are provided, and all the air flow generating members 130 are configured to be able to generate an annular air flow arranged around an axis in the receiving cavity. The radiator 140 is located on the path of the annular air flow, and the extending direction of the axis is parallel to the first direction F1.

[0137] The housing 170 may include a first part 171 and a second part 172. The first part 171 and the second part 172 cooperate to form the receiving cavity. Among them, Figure 2 , Figure 16 and Figure 23 are schematic diagrams of the structure with the first part 171 removed. Among them, a liquid inlet joint J1 communicating with the inlet of the cooling channel p1 and a liquid outlet joint J2 communicating with the outlet of the cooling channel p1 may be provided on the second part 172.

[0138] A plurality of air flow generating members 130 generate an annular air flow arranged around the axis. The radiator 140 is located on this air flow path, enabling the radiator 140 to be in full contact with the air flow. Since the annular air flow can exchange heat with the radiator 140, the annular air flow can dissipate heat from the related components provided on the first side c1 of the liquid cooling component 110. The combination of the liquid cooling component 110 and the annular air flow air cooling forms a dual heat dissipation mechanism. The liquid cooling component 110 can effectively remove a large amount of heat generated by the first device 120, and the cooperation between the annular air flow and the radiator 140, as well as the cooperation between the radiator 140 and the liquid cooling component 110, further strengthens the heat dissipation of the entire accommodation cavity. The two heat dissipation methods cooperate with each other, can better meet the heat dissipation requirements under different working conditions, and improve the heat dissipation performance and adaptability of the power conversion device 100.

[0139] It should be noted that the annular air flow can form a continuous air flow path around the radiator 140 and related heat generating components, comprehensively covering the area that needs to be cooled. Compared with the traditional linear or local air flow, it can contact the heat generating surface more fully, take away more heat, thereby improving the heat dissipation efficiency and being beneficial to improving the temperature uniformity of the overall device.

[0140] According to some embodiments of the present application, please continue to refer to Figure 2 、 Figure 3 、 Figure 16 and Figure 23 . The liquid cooling component 110 has a third side c3 and a fourth side c4 that are oppositely arranged along the second direction F2, and a fifth side c5 and a sixth side c6 that are oppositely arranged along the third direction F3. The third side c3, the fourth side c4, the fifth side c5, and the sixth side c6 define four corners q. The first direction F1, the second direction F2, and the third direction F3 are perpendicular to each other in pairs. Two air flow generating members 130 are provided. The two air flow generating members 130 are respectively arranged close to two non-adjacent corners q. The two non-adjacent corners q are two non-adjacent corners q on the circumferential side of the liquid cooling component 110.

[0141] In this way, it is not only beneficial to form an annular air flow, but also can reduce the space occupied by the air flow generating members 130 in the accommodation cavity.

[0142] Of course, in some other embodiments, the number of the air flow generating members 130 can also be three, four or other numbers, which are not specifically limited here as long as an annular air flow can be formed.

[0143] According to some embodiments of the present application, please refer to Figure 24 , Figure 24The schematic diagram of the structure of the circuit board assembly 180, the airflow generating element 130, the housing 170 and the liquid cooling component 110 in some embodiments of the present application, the power conversion device 100 also includes a housing 170 and a circuit board assembly 180. The housing 170 has a receiving cavity, the liquid cooling component 110 is arranged in the receiving cavity, the first side c1 of the liquid cooling component 110 and the cavity wall of the receiving cavity define the receiving cavity, and a plurality of first components 120, the airflow generating element 130, the heat sink 140 and the circuit board assembly 180 are arranged in the receiving cavity. The circuit board assembly 180 includes a circuit board 181 and a second component 182 arranged on the circuit board 181, the circuit board 181 is spaced apart from the first side c1 of the liquid cooling component 110, and defines an airflow channel p3. A part of the outlet of the airflow generating element 130 is arranged corresponding to the airflow channel p3, and the other part is arranged corresponding to the side of the circuit board 181 away from the liquid cooling component 110.

[0144] In this way, the airflow generated by the airflow generating element 130 can be divided by the circuit board 181 , so that airflow can pass through both sides of the circuit board 181 in the first direction F1 , thereby dissipating heat for the components on the circuit board 181 .

[0145] According to some embodiments of this application, please continue to refer to Figure 24 At least part of the first device 120 is disposed in the air flow channel p3. The first device 120 is electrically connected to the circuit board 181.

[0146] In this way, not only can the overall structure be made more compact, but also the heat dissipation of the first device 120 can be further facilitated.

[0147] According to some embodiments of this application, please continue to refer to Figure 2 , Figure 3 , Figures 16 to 18 , Figure 21 and Figure 23 Along the extension direction of the cooling channel p1, the heat sink 140 is disposed closer to the inlet of the cooling channel p1 than to the outlet of the cooling channel p1.

[0148] Since the temperature of the liquid at the inlet of the cooling channel p1 is relatively low, the radiator 140 is arranged there so that the radiator 140 can first contact the liquid with a relatively low temperature, thereby facilitating cooling of the airflow generated by the airflow generating element 130, and improving the heat dissipation effect of the airflow on the relevant components of the first side c1 of the liquid cooling component 110. In addition, arranging the radiator 140 close to the inlet can reduce the temperature rise and volume expansion of the liquid in the cooling channel p1, thereby reducing the pressure at the outlet of the cooling channel p1 and reducing the risk of leakage or damage at the outlet of the cooling channel p1 due to excessive pressure.

[0149] According to some embodiments of this application, please continue to refer to Figure 5, Figure 6 , Figure 17 and Figure 18 , the cooling channel p1 includes a buffer chamber x communicating with the outlet of the cooling channel p1.

[0150] Since the buffer chamber x can relieve the pressure fluctuation of the coolant at the outlet of the cooling channel p1, when the operating state of the cooling system changes, it can improve the damage caused to the cooling channel p1 and related components due to the pressure fluctuation, and improve the stability and reliability of the overall device.

[0151] It should be noted that a flow disturbing structure can also be provided in the buffer chamber x. For the advantages brought by the flow disturbing structure, reference can be made to the content shown in some of the foregoing embodiments, and details will not be repeated here. Of course, in combination with reference to Figure 7 , a flow disturbing structure can also be provided in the cooling channel p1 corresponding to different devices or components. For the advantages brought by the flow disturbing structure, details will not be repeated here.

[0152] According to some embodiments of the present application, please continue to refer to Figure 3 , Figure 21 , and in combination with reference to Figure 25 and Figure 26 , Figure 25 is Figure 3 a schematic structural diagram of the structure shown with some parts removed, Figure 26 is Figure 21 a schematic structural diagram of the structure shown with some parts removed. The first side c1 of the liquid cooling component 110 includes a plurality of mounting areas z. The power conversion device 100 further includes a plurality of heat pipes 190, and the plurality of heat pipes 190 are arranged in one-to-one correspondence with the plurality of mounting areas z, and the heat pipes 190 are arranged in the corresponding mounting areas z. The plurality of heat pipes 190 are arranged in one-to-one correspondence with at least some of the plurality of first devices 120, and the corresponding first devices 120 are mounted on the side of the heat pipe 190 facing away from the liquid cooling component 110.

[0153] The heat pipe 190 is a flat heat dissipation element with high efficient heat conduction ability, usually made of materials with high thermal conductivity, such as metals like copper and aluminum or some high-performance composite materials. The heat pipe 190 utilizes the phase change material or high thermal conductivity structure inside to achieve rapid heat transfer and uniform distribution. When one side of the heat pipe 190 contacts the first device 120, the heat will quickly conduct through the plate body material to the entire heat pipe 190. At the same time, the phase change material inside the heat pipe 190 will absorb heat and undergo a phase change in the high-temperature area, and then release heat and undergo a reverse phase change in the lower-temperature area. In this way, rapid heat transfer and homogenization are achieved, making the temperature difference on the surface of the heat pipe 190 extremely small, playing a role in temperature equalization.

[0154] Exemplarily, the first device 120 may be an IGBT. Of course, the first device 120 may also be an inductor, and no specific limitation is made here.

[0155] Thus, by providing the heat pipe 190, not only can the temperature distribution on the surface of the first device 120 be made more uniform, thereby improving the performance stability and reliability of the device, reducing the thermal stress and device aging caused by uneven temperature, but also the heat generated by the first device 120 can be quickly transferred to the liquid cooling component 110, and the heat can be taken away by the cooling liquid in the liquid cooling component 110, effectively improving the heat dissipation efficiency.

[0156] According to some embodiments of the present application, please continue to refer to Figure 4 、 Figure 6 、 Figure 25 and Figure 26 , a recess u is provided in the installation area z, and the recess u and the heat pipe 190 are provided in one-to-one correspondence. The heat pipe 190 is embedded in the installation area z by means of the corresponding recess u.

[0157] Exemplarily, the heat pipe 190 may be connected to the inner wall of the recess u by means of a thermal conductive adhesive. Of course, the heat pipe 190 may also be connected to the liquid cooling component 110 by welding. No specific limitation is made here. The heat pipe 190 may be flush with the liquid cooling component 110 or may protrude from the liquid cooling component 110, and no specific limitation is made here.

[0158] Thus, by providing the recess u, it is not only convenient to install the heat pipe 190, but also the contact area between the heat pipe 190 and the installation area z can be increased, and the heat pipe 190 can be limited, so as to enhance the stability of the installation of the heat pipe 190 and at the same time help to improve the heat dissipation efficiency.

[0159] According to some embodiments of the present application, an energy storage device is provided in an embodiment of the present application, including the power conversion device 100 in any of the above embodiments.

[0160] In some embodiments, the energy storage device further includes a battery, and the aforementioned power conversion device 100 is electrically connected to the battery. The power conversion device 100 can convert the energy generated by solar energy, wind power generation or fuel cells into direct current and store it in the battery, and output the electric energy in the battery when needed. The energy storage device can provide a reliable energy reserve for users and provide a backup power supply for users when there is a power outage or power shortage, which is convenient for users to use.

[0161] The energy storage device also has the same advantages as those of the above-mentioned power conversion device 100, which will not be elaborated here.

[0162] It should be noted that the power conversion device 100 illustrated in the embodiments of the present application may include at least one of a power conversion system (PCS), a DC-DC converter, a charging module, an energy storage cabinet, and a charging pile. The PCS, DC-DC converter, and charging module may be independent devices or integrated into the energy storage cabinet and the charging pile. The PCS and DC-DC converter may be provided in the energy storage cabinet, and the charging module may be provided in the charging pile. Exemplarily, the power conversion device 100 may include a PCS, which may be a bi-directional current controllable conversion device connecting the battery and the power grid (or load), capable of controlling the charging and discharging processes of the storage battery, performing AC-DC conversion, and accurately and rapidly adjusting the voltage, frequency, and power between the power grid and the energy storage device.

[0163] The technical features of the above-described embodiments may be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0164] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A power conversion device, characterized in that, Comprising: A liquid cooling component having a cooling channel; the liquid cooling component has a first side and a second side oppositely arranged in a first direction; A plurality of first devices and an air flow generating member, provided on the first side; and A radiator, provided on the first side and located on the air flow path generated by the air flow generating member; the radiator includes at least one pipe; along the gravity direction, the pipe is located upstream of the liquid cooling component; Wherein, the cooling channel includes a first channel section and a second channel section that are independent of each other, the first channel section is communicated with the inlet of the cooling channel, the second channel section is communicated with the outlet of the cooling channel, the first channel section is configured to have a first buffer section, and the second channel section is configured to have a second buffer section; The inlet of the pipe is located in the first buffer section and communicated with the first buffer section, and the outlet of the pipe is located in the second buffer section and communicated with the second buffer section, so that the liquid in the cooling channel can flow into the pipe through the inlet of the pipe and flow out of the pipe from the outlet of the pipe.

2. The power conversion device according to claim 1, characterized in that, A plurality of the pipes are provided; all the pipes are arranged at intervals along the extending direction of the air flow path generated by the air flow generating member.

3. The power conversion device according to claim 2, characterized in that, Along the extending direction of the air flow path generated by the air flow generating member, at least part of two adjacent pipes are staggeredly arranged.

4. The power conversion device according to any one of claims 1 to 3, characterized in that, The radiator further includes a heat dissipation part, and the pipe is connected to the heat dissipation part.

5. The power conversion device according to claim 4, wherein At least part of the pipe penetrates through the heat dissipation part.

6. The power conversion device according to claim 5, characterized in that, The pipe includes a plurality of extending sections arranged at intervals, and at least one connecting section; The plurality of extending sections are connected in series by means of the at least one connecting section; along the series connection direction of the plurality of extending sections, the inlet of the first extending section is the inlet of the pipe, and the outlet of the last extending section is the outlet of the pipe; At least one of the connecting sections extends out of the heat dissipation part along the first direction.

7. The power conversion device according to claim 6, characterized in that, The extending section extends linearly along the first direction; or The extending section extends spirally along the first direction.

8. The power conversion device according to claim 6, characterized in that, The connecting section is configured as an arc transition section; or The connecting section is configured to extend spirally along the extending direction of the connecting section.

9. The power conversion device according to claim 4, wherein, The heat dissipation part includes at least one row of a plurality of heat dissipation fins arranged at intervals along the first direction, and each row of heat dissipation fins defines an interval channel; The inlet side of the air flow generating member is connected to one side of the heat dissipation part, and the inlet of the air flow generating member is communicated with the interval channel.

10. The power conversion device according to claim 9, wherein, Along the direction from the liquid cooling component to the radiator, the sizes of all the interval channels along the first direction decrease in sequence; The direction from the liquid cooling component to the radiator and the first direction are parallel to each other.

11. The power conversion device according to claim 9, characterized in that, The inlet side of the air flow generating member is connected to one side of the heat dissipation part, and the inlet of the air flow generating member includes a first sub-inlet, a second sub-inlet and a third sub-inlet arranged in sequence along the first direction, and the second sub-inlet is communicated between the first sub-inlet and the third sub-inlet; The first sub-inlet is arranged corresponding to one side of the radiator along the first direction, the second sub-inlet is arranged corresponding to the interval channel, and the third sub-inlet is arranged corresponding to the other side of the radiator along the first direction.

12. The power conversion device according to any one of claims 1-3, characterized in that, The power conversion device further includes a first flow disturbing structure disposed in the first channel section; and / or The power conversion device further includes a second flow disturbing structure disposed in the second channel section; and / or A control valve is provided at the outlet of the second channel section, and a temperature detection component is provided on the radiator. The temperature detection component is configured to detect the temperature of the radiator, and the control valve is configured to control the opening degree of the outlet of the second channel section in response to the detection signal of the temperature detection component.

13. The power conversion device according to any one of claims 1 to 3, characterized in that, The cooling channel further includes a third channel section. The orthographic projection of the plurality of first devices on a reference plane overlaps with the orthographic projection of the third channel section on the reference plane, and the reference plane is a plane perpendicular to the first direction; The first channel section, the second channel section, and the third channel section are connected in series in sequence.

14. The power conversion device according to any one of claims 1 to 3, characterized in that, The power conversion device further includes a housing; The housing has a receiving cavity, the liquid cooling component is disposed in the receiving cavity, a first side of the liquid cooling component and a cavity wall of the receiving cavity define a containing cavity, and the plurality of first devices, the air flow generating component, and the radiator are disposed in the containing cavity; A plurality of air flow generating components are provided, and all the air flow generating components are configured to be able to generate an annular air flow disposed around an axis in the containing cavity. The radiator is located on the path of the annular air flow, and the extending direction of the axis is parallel to the first direction.

15. The power conversion device according to any one of claims 1-3, characterized in that, The power conversion device further includes a housing and a circuit board assembly; The housing has a receiving cavity, the liquid cooling component is disposed in the receiving cavity, a first side of the liquid cooling component and a cavity wall of the receiving cavity define a containing cavity, and the plurality of first devices, the air flow generating component, the radiator, and the circuit board assembly are disposed in the containing cavity; The circuit board assembly includes a circuit board and second devices disposed on the circuit board. The circuit board is spaced apart from the first side of the liquid cooling component and defines an air flow channel; a part of the outlet of the air flow generating component corresponds to the air flow channel, and another part corresponds to the side of the circuit board facing away from the liquid cooling component.

16. The power conversion device according to any one of claims 1-3, characterized in that, Along the extending direction of the cooling channel, the radiator is disposed closer to the inlet of the cooling channel than the outlet of the cooling channel; and / or The cooling channel includes a buffer cavity communicating with the outlet of the cooling channel.

17. The power conversion device according to any one of claims 1-3, characterized in that, The first side of the liquid cooling component includes a plurality of mounting areas. The power conversion device further includes a plurality of heat pipes, and the plurality of heat pipes are disposed in one-to-one correspondence with the plurality of mounting areas, and the heat pipes are disposed in the corresponding mounting areas; The plurality of heat pipes are disposed in one-to-one correspondence with at least some of the plurality of first devices, and the corresponding first devices are mounted on the side of the heat pipe facing away from the liquid cooling component.

18. An energy storage device, characterized in that, Including the power conversion device according to any one of claims 1-17.

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