Energy storage converter and energy storage system

Abstract

The present application relates to the field of energy storage converters and provides an energy storage converter and energy storage system, wherein the energy storage converter includes: an upper shell and a bottom shell forming a chamber; an inductor and an IGBT module are located in the chamber; a liquid cooling assembly includes: a cooling pipe, a temperature regulating structure, an element cooling channel and a spoiler; the temperature regulating structure includes a plurality of cooling parts, which are connected in series and parallel through cooling pipes; a cooling cavity is provided in the cooling part; the IGBT module corresponds to the cooling part; the element cooling channel and the temperature regulating structure are connected in series through the cooling pipe; the inductor corresponds to the element cooling channel; the spoiler includes a plurality of ring bodies connected to each other, and the spoiler is arranged in the cooling cavity; wherein, in the direction of liquid flow, the total length of the spoiler in the latter cooling part is greater than or equal to the total length of the spoiler in the former cooling part. The energy storage converter provided by the embodiment of the present application can at least solve the problem that the cooling performance of the liquid cooling assembly in the energy storage converter does not match the high thermal management requirements.

Description

Technical Field

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

[0002] A power conversion system (PCS) is one of the core components of an energy storage system. It includes power conversion components (such as IGBTs, or insulated gate bipolar transistors), control components, protection components, a communication module, and a heat dissipation system (such as a heat sink, fan, or liquid cooling plate).

[0003] With the rapid development of energy storage technology, the thermal management requirements for energy storage converters are becoming increasingly stringent. Compared to air cooling, liquid cooling technology has rapidly developed due to its unique advantages in temperature uniformity and energy saving.

[0004] Therefore, how to design an energy storage converter with efficient cooling performance is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The embodiments of the present application provide an energy storage converter and an energy storage system, which at least help to solve the problem of mismatch between the cooling performance of the liquid cooling component in the energy storage converter and the high thermal management requirements.

[0006] According to some embodiments of the present application, an energy storage converter is provided, including:

[0007] an upper shell and a bottom shell, wherein the upper shell and the bottom shell form a chamber;

[0008] an inductor and an IGBT module, wherein the inductor and the IGBT module are located in the cavity;

[0009] A liquid cooling assembly is located on the bottom shell and includes:

[0010] Several cooling pipes;

[0011] A temperature control structure, the temperature control structure comprising a plurality of cooling parts connected in series and parallel via cooling pipes; the cooling parts having a cooling cavity therein; the IGBT module corresponding to the cooling parts;

[0012] At least one component cooling channel, wherein the component cooling channel and the temperature adjustment structure are connected in series through the cooling pipe; the inductor corresponds to the component cooling channel;

[0013] A spoiler, the spoiler comprising a plurality of ring bodies connected to each other, and the spoiler is arranged in the cooling cavity;

[0014] Among them, in the liquid flow direction, the total length of the spoilers in the latter cooling part is greater than or equal to the total length of the spoilers in the former cooling part; the liquid flow direction is the flow direction of the heat exchange medium in the liquid cooling component.

[0015] In some embodiments, the cooling cavity of the cooling portion has a water inlet and a water outlet, at least two spoilers are disposed in the cooling cavity, and the spoilers are sequentially connected in series along a path from the water inlet to the water outlet.

[0016] In some embodiments, the spoilers extend along a preset direction, and a plurality of the spoilers are arranged side by side in the cooling portion, and adjacent spoilers are connected in series end to end to form a spoiler group.

[0017] In some embodiments, one of the liquid inlet direction of the water inlet or the liquid outlet direction of the water outlet is perpendicular to the preset direction.

[0018] In some embodiments, the ring body includes a linear ring body or a sheet-like ring body.

[0019] In some embodiments, the linear diameter φ1 of the linear ring body, the outer diameter φ2 of the linear ring body, and the first pitch t1 of the linear ring body satisfy the following conditions: 1.5 mm ≤ φ1 ≤ 2.5 mm, 15 mm ≤ φ2 ≤ 20 mm, and 8 mm ≤ t1 ≤ 11 mm.

[0020] The radius r1 of the sheet-like ring body, the thickness t of the sheet-like ring body, and the second pitch t2 of the sheet-like ring body satisfy 6mm≤r1≤10mm, 0.2mm≤t≤0.3mm, and 6mm≤t2≤10mm.

[0021] In some embodiments, the cooling pipe includes a liquid inlet pipe, a liquid outlet pipe and a connecting pipe, and adjacent cooling parts are connected by the connecting pipe;

[0022] Along the liquid flow direction, the liquid inlet pipe, the temperature adjustment structure, the element cooling channel and the liquid outlet pipe are sequentially connected in series.

[0023] In some embodiments, a liquid inlet spoiler is provided in the liquid inlet pipe, and a series spoiler is provided in the cooling pipe partially connected to the cooling part. The liquid inlet spoiler, the series spoiler and the spoiler in the cooling part are connected to form a liquid inlet end spoiler group.

[0024] In some embodiments, it also includes: a tray, the tray body having a first side and a second side arranged opposite to each other, the liquid cooling component is arranged on the first side of the tray, and the bottom shell is arranged on the second side of the tray; the first side surface of the tray has a mounting groove adapted to the liquid cooling component, and the liquid cooling component is embedded in the mounting groove.

[0025] In some embodiments, the mounting slot includes a liquid inlet slot and a liquid outlet slot extending to the edge of the tray, the liquid inlet pipe and the liquid outlet pipe are respectively embedded in the liquid inlet slot and the liquid outlet slot, the liquid inlet pipe has a liquid inlet at a position corresponding to the side wall of the tray, and the liquid outlet pipe has a liquid outlet at a position corresponding to the side wall of the tray;

[0026] The energy storage converter further includes a liquid inlet joint and a liquid outlet joint, wherein the liquid inlet joint and the liquid outlet joint are arranged on the side wall of the bottom shell, and the liquid inlet joint and the liquid outlet joint are respectively connected to the liquid inlet pipe and the liquid outlet pipe.

[0027] According to some embodiments of the present application, another aspect of the present application further provides an energy storage system, including:

[0028] A battery pack, wherein the battery pack is formed by connecting a plurality of secondary batteries;

[0029] an energy storage converter, the energy storage converter being electrically connected to the battery pack;

[0030] Wherein, the energy storage system includes the energy storage converter as described in any one of the above items.

[0031] The technical solution provided by the embodiment of the present application has at least the following advantages: the present application arranges a spoiler in the cooling part corresponding to the IGBT module with a larger heat generation, and the spoiler regulates the flow rate, flow velocity and other properties of the heat exchange medium inside the cooling part to improve the heat exchange efficiency of the cooling part to the IGBT module. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present application or the technical solutions in the traditional technology, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic structural diagram of an energy storage converter provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the exploded structure of an energy storage converter provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the installation structure of electronic components in an energy storage converter provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of the installation structure of a liquid cooling component in an energy storage converter provided in an embodiment of the present application;

[0037] Figure 5 A schematic structural diagram of a liquid cooling assembly in an energy storage converter provided in an embodiment of the present application;

[0038] Figure 6 A cross-sectional view of a liquid cooling assembly in an energy storage converter provided in an embodiment of the present application;

[0039] Figure 7 A schematic structural diagram of a spoiler group in an energy storage converter provided in an embodiment of the present application;

[0040] Figure 8 A schematic structural diagram of a fluid inlet end disturbance group in an energy storage converter provided in an embodiment of the present application;

[0041] Figure 9 A schematic structural diagram of a tray in an energy storage converter provided in an embodiment of the present application.

[0042] In the figure: 100, outer shell; 110, bottom shell; 111, bottom plate; 112, side plate; 120, upper shell; 131, liquid inlet connector; 132, liquid outlet connector; 140, hose; 200, tray; 210, mounting slot; 2111, liquid inlet slot; 2112, liquid outlet slot; 2113, connecting slot; 212, cooling slot; 214, cooling channel slot; 300, liquid cooling assembly; 310, cooling pipe; 311 liquid inlet pipe; 312, liquid outlet pipe; 313, connecting pipe ; 320, cooling part; 3201, cooling chamber; 321, first cooling part; 322, second cooling part; 323, third cooling part; 324, fourth cooling part; 340, component cooling channel; 341, shunt pipe; 342, series flow pipe; 400, spoiler; 401, bending part; 410, liquid inlet spoiler; 420, series spoiler; 41, spoiler group; 42, liquid inlet end spoiler group; 510, IGBT module; 520, inductor; 530, circuit board. DETAILED DESCRIPTION

[0043] As can be seen from the background technology, liquid cooling technology has unique advantages in temperature uniformity and energy saving. The energy storage inverter uses a liquid cooling plate to cool the electronic components inside it. However, different electronic components in the energy storage inverter generate different amounts of heat, and the coolant in the liquid cooling plate flows through different electronic components in sequence at a constant flow rate and flow path to cool them. The temperature of some electronic components with higher heat generation is still higher than the temperature of some electronic components with lower heat generation, or the temperature of some electronic components that are in the back of the liquid cooling plate through which the coolant flows is still higher than the temperature of some electronic components that are in the front of the liquid cooling plate through which the coolant flows, so that a temperature gradient is generated between the electronic components. The uneven temperature between the electronic components in the energy storage inverter will reduce the performance of the energy storage inverter, and thus affect the endurance of the battery pack.

[0044] The present application provides an energy storage converter, comprising a liquid flow plate. Cooling sections within the liquid flow plate are positioned to correspond to a large number of electronic components (IGBT modules) generating high heat output. A spoiler is positioned within the cooling section to adjust the flow rate and flow path of the heat exchange medium within the cooling section, thereby achieving precise cooling of the high-heat-generating electronic components. The spoiler's length increases sequentially with the order of the cooling section within which it is located in the flow channel, thereby causing more intense heat exchange medium disturbance within the later cooling sections within the liquid cooling assembly flow channel. This ensures a heat exchange effect for the electronic components corresponding to the later cooling sections, thereby reducing temperature gradients between the electronic components and achieving a more uniform temperature distribution. This prevents performance degradation of the energy storage converter due to excessively high or uneven internal temperatures.

[0045] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly indicate the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined. Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0046] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0048] In the description of the embodiments of the present application, the technical terms "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplification of the embodiments of the present application. They are not intended to indicate or imply that the devices or elements referred to must have, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the embodiments of the present application. For example, if the device or element in the figure is inverted, then an element described as being "below," "beneath," "under," or "below" another element or feature would be oriented "above" or "on top" of the other element or feature. Therefore, the term "below" can encompass both above and below orientations, depending on the context in which the term is used, as will be apparent to one of ordinary skill in the art. Materials can be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatially relative descriptors used herein should be interpreted accordingly.

[0049] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0050] In the accompanying drawings corresponding to the embodiments of the present application, the thickness and area of ​​each layer are exaggerated for better understanding and ease of description. In addition, when a component is described as being "substantially" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0051] In the description of the embodiments of the present application, when a certain component "includes" another component, unless otherwise stated, other components are not excluded, and other components may be further included. A second component is formed or provided above or on the first component, or a second component is formed or provided on the surface of the first component, or a second component is formed or provided on one side of the first component. Embodiments in which the first component and the second component are in direct contact may be included, and embodiments in which additional components may be provided between the first component and the second component so that the first component and the second component may not be in direct contact may also be included. For the sake of simplicity and clarity, various components may be arbitrarily drawn in different proportions. In the accompanying drawings, some layers / components may be omitted for simplicity. Unless otherwise specified, a second component is formed or provided on the surface of the first component, which means that the first component is in direct contact with the second component. Among them, the above-mentioned "components" may refer to layers, films, regions, parts, structures, etc.

[0052] The terms used herein in the description of the various embodiments are intended only to describe the specific embodiments and are not intended to be limiting. As used in the description of the various embodiments and the appended claims, "the component" is intended to include the plural form unless the context clearly indicates otherwise. A component includes a layer, film, region, or plate.

[0053] The following detailed description of the various embodiments of the present application is provided in conjunction with the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in the various embodiments of the present application to facilitate a better understanding of the present application. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented.

[0054] Figures 1 to 6 A schematic diagram of the structure of the energy storage converter provided in an embodiment of the present application.

[0055] refer to Figures 1 to 6 The energy storage converter includes: an upper shell 120 and a bottom shell 110, wherein the upper shell 120 and the bottom shell 110 form a chamber; an inductor 520 and an IGBT module 510 are located in the chamber; a liquid cooling assembly 300, which is located on the bottom shell 110 and includes:

[0056] a plurality of cooling pipes 310;

[0057] The temperature control structure includes a plurality of cooling units 320 connected in series and parallel via cooling pipes 310 ; a cooling cavity 3201 is provided in the cooling unit 320 ; and the IGBT module 510 corresponds to the cooling unit 320 ;

[0058] At least one component cooling channel 340, the component cooling channel 340 and the temperature adjustment structure are connected in series via the cooling pipe 310; the inductor 520 corresponds to the component cooling channel 340;

[0059] The spoiler 400 includes a plurality of ring bodies connected to each other and is disposed in the cooling cavity 3201;

[0060] In the liquid flow direction, the total length of the spoiler 400 in the rear cooling part 320 is greater than or equal to the total length of the spoiler 400 in the front cooling part 320; the liquid flow direction is the flow direction of the heat exchange medium in the liquid cooling component 300.

[0061] In the embodiment of the present application, a spoiler 400 is provided within the cooling section 320 corresponding to the IGBT module 510 with higher heat generation, to adjust the flow rate and flow path of the heat exchange medium within the cooling section 320, thereby improving the heat exchange effect of the cooling section 320 on the IGBT module 510. Furthermore, the length of the spoilers 400 within the cooling section 320 increases sequentially according to the order of the temperature control structures in which they are located within the flow channel, so that the spoilers 400 within the later cooling sections 320 have a stronger disturbing effect on the heat exchange medium, thereby ensuring the heat exchange effect of the later cooling sections 320 on the IGBT module 510, reducing the temperature gradient between the IGBT modules 510, and achieving a uniform temperature distribution within the energy storage converter, thereby avoiding degradation of the energy storage converter's performance due to uneven temperature distribution or excessive temperatures of some electronic components.

[0062] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings.

[0063] Reference Figure 1 、 Figure 2 As shown, Figure 1 and Figure 2 The following diagrams respectively show a schematic structural diagram and an exploded structural diagram of an energy storage converter provided by an embodiment of the present application. The energy storage converter has intersecting and perpendicular predetermined directions X, Y, and Z. The energy storage converter includes: a housing 100, a tray 200, a liquid cooling assembly 300, and electronic components. The housing 100 includes an upper housing 120 and a bottom housing 110, which enclose a chamber. The tray 200, liquid cooling assembly 300, and electronic components are all disposed within this chamber.

[0064] Combine Figure 3 、 Figure 4 As shown, Figure 3 and Figure 4A schematic diagram of the installation structure of an electronic component in an energy storage inverter provided in an embodiment of the present application and a schematic diagram of the installation structure of a liquid cooling component 300 are respectively shown. The bottom shell 110 is a box-type structure with an open surface on one side. The bottom shell 110 includes a square bottom plate 111 and side plates 112 arranged around the edges of the bottom plate 111.

[0065] The tray 200 is mounted on the bottom case 110. The electronic components are located on the side of the tray 200 facing away from the bottom case 110, and the liquid cooling assembly 300 is sandwiched between the electronic components and the tray 200. The electronic components include an electrically connected IGBT module 510, an inductor 520, and a circuit board 530. The IGBT module 510 is mounted on the circuit board 530, and the liquid cooling assembly 300 is located on the other side of the circuit board 530 to cool the IGBT module 510. The inductor 520 is directly located on the side of the liquid cooling assembly 300 facing away from the tray 200 and is cooled by the liquid cooling assembly 300. The liquid cooling assembly 300 cools the IGBT module 510 and inductor 520, which generate heat during operation, to prevent performance degradation due to excessive temperatures. The heat generated by the IGBT module 510 during operation is greater than that generated by the inductor 520.

[0066] It should be noted that in some embodiments, the inductor 520 is directly mounted on the side of the liquid cooling assembly 300 facing away from the tray 200. In other embodiments, the inductor 520 may also be mounted on the circuit board 530, with the liquid cooling assembly 300 cooling the inductor 520 on the other side of the circuit board 530. This is not specifically limited here.

[0067] Combine Figure 5 、 Figure 6 As shown, Figure 5 and Figure 6The schematic diagram and cross-sectional view of a liquid cooling assembly 300 in an energy storage converter according to an embodiment of the present application are shown. The liquid cooling assembly 300 includes a cooling pipe 310, a temperature control structure, an element cooling channel 340, and a baffle 400. The cooling pipe 310, the temperature control structure, and the element cooling channel 340 have interconnected flow channels for circulating a heat exchange medium. The heat exchange medium flows in the flow channels in the direction of liquid flow. The cooling pipe 310 includes a liquid inlet pipe 311 and a liquid outlet pipe 312, respectively, for communicating with a liquid inlet connector 131 and a liquid outlet connector 132 (shown below), as well as a connecting pipe 313 for connecting the temperature control structure and the element cooling channel 340. The temperature control structure includes at least two cooling sections 320, which are provided in correspondence with the IGBT module 510 for cooling the IGBT module 510. The element cooling channel 340 is provided in correspondence with the inductor 520 for cooling the inductor 520. Because the heat generated by the IGBT module 510 is greater than that of the inductor 520, in the direction of liquid flow, the component cold channel 340 used to cool the inductor 520 is connected in series after the temperature control structure used to cool the IGBT module 510, so that the heat exchange medium with a lower initial temperature is preferentially used to cool the IGBT module 510, so that the temperature distribution in the energy storage inverter is uniform, avoiding the performance degradation of the energy storage inverter due to uneven temperature.

[0068] The cooling unit 320 has a cooling chamber 3201 for the flow of heat exchange medium. The cooling unit 320 has at least one liquid inlet and at least one liquid outlet. The cooling chamber 3201 is connected to the connecting pipe 313 through the liquid inlet and the liquid outlet. The direction in which the heat exchange medium enters the cooling chamber 3201 through the liquid inlet is the liquid inflow direction, and the direction in which the heat exchange medium flows out of the cooling chamber 3201 through the liquid outlet is the liquid outflow direction. Multiple cooling units 320 are connected in series and parallel via the connecting pipe 313. The multiple cooling units 320 form an N-stage series structure along the liquid flow direction within the flow channel, where N ≥ 2. There is at least one cooling unit 320 in the same stage, that is, the temperature control structure includes at least two cooling units 320. Multiple cooling units 320 in the same stage are connected in parallel. The parallel cooling units 320 can be connected in parallel through a multi-channel connecting pipe 313 or connected in series with the cooling unit 320 of the previous stage through at least one single-channel connecting pipe 313.

[0069] In some embodiments, the liquid cooling assembly 300 includes six cooling units 320, which are arranged in a four-stage series structure within the flow channel of the liquid cooling assembly 300. The six cooling units 320 include a first cooling unit 321, a second cooling unit 322, two third cooling units 323, and two fourth cooling units 324. The first cooling unit 321 is the first stage of the four-stage series structure, the second cooling unit 322 is the second stage of the four-stage series structure, the third cooling unit 323 is the third stage of the four-stage series structure, and the fourth cooling unit 324 is the fourth stage of the four-stage series structure. Within the flow channel, the first cooling unit 321, the second cooling unit 322, the third cooling unit 323, and the fourth cooling unit 324 are connected in series in sequence along the direction of liquid flow. The two third cooling units 323 in the third stage are connected to the second cooling unit 322 in the second stage via a bifurcated connecting pipe 313. The two fourth cooling units 324 in the fourth stage are connected to two different third cooling units 323 via a single-channel connecting pipe 313.

[0070] It should be noted that the number of cooling units 320 provided at the same level can be one or more, and is not specifically limited here.

[0071] It should also be noted that the connecting pipe 313 between the cooling section 320 and the upper-level cooling section 320 can be a connecting pipe 313 with a single-channel structure, a connecting pipe 313 with a multi-branch structure, or a connecting pipe 313 with an all-in-one structure, and no specific limitation is made here.

[0072] Reference Figure 7 、 Figure 8 As shown, Figure 7 and Figure 8The present invention shows a schematic structural diagram of a spoiler 400 in an energy storage converter provided by an embodiment of the present application. At least two spoilers 400 are arranged in the cooling cavity 3201 of the cooling portion 320 to regulate the flow rate and flow path of the heat exchange medium in the cooling cavity 3201. The spoiler 400 includes a plurality of ring bodies connected to each other. The ring body is an annular structure that rotates around an axis and has a gap. The ring body includes a top end and a bottom end that are opposite and staggered. In the extension direction of the axis, the top end and the bottom end of the ring body are staggered with each other and form the above-mentioned gap. The top end of the ring body is connected to the bottom end of another ring body adjacent to one side thereof. Several coaxial ring bodies are connected to each other to form a spoiler 400 with a spiral structure extending along a preset direction X. At least two spoilers 400 are arranged side by side in the cooling cavity 3201 of the cooling portion 320 along the length direction Y. When the heat exchange medium flows through the cooling cavity 3201, it will be stratified, forming an outer layer of liquid flow close to the inner wall of the cooling portion 320 and an inner layer of liquid flow surrounded by the outer layer of liquid flow. The outer layer of liquid flow will have a reduced flow rate due to the viscosity effect between the liquid and the inner wall, and there will be almost no liquid flow between the outer and inner layers of liquid flow, so that the inner layer of liquid flow has a small heat exchange effect during the heat exchange process between the cooling portion 320 and the IGBT module 510, and a temperature difference will be formed between the inner and outer layers of liquid flow. The spoiler 400 of the embodiment of the present application has a turbulent effect on the heat exchange medium, forcing the heat exchange medium to flow along the spiral path of the spoiler 400, so that the heat exchange medium adheres to the surface of the spoiler 400 for a longer time, effectively reducing the formation of heat exchange medium stratification, increasing the degree of mixing of the heat exchange medium in the cooling portion 320, and thus improving the heat exchange effect of the cooling portion 320.

[0073] In some embodiments, the extension direction of the spoiler 400 is a preset direction X, and either the inlet direction or the outlet direction of the heat exchange medium in the cooling cavity 3201 where the spoiler 400 is located is perpendicular to the preset direction X. The extension direction of the spoiler 400 is perpendicular to either the inlet direction or the outlet direction of the heat exchange medium, thereby further improving the flow disturbance effect of the spoiler 400 on the heat exchange medium, thereby improving the heat exchange effect of the liquid cooling assembly 300 on the IGBT module 510.

[0074] It should be noted that the extension direction of the spoiler 400 can be the preset direction X or any other direction. It only needs to ensure that the extension direction of the spoiler 400 is perpendicular to either the liquid inlet direction or the liquid outlet direction of the heat exchange medium in the cooling chamber 3201 where it is located. No specific limitation is made here.

[0075] Combine Figure 6 、 Figure 7As shown, in some embodiments, the spoiler 400 has a first end and a second end opposite to each other in the direction of its extension. In the same cooling cavity 3201, the first end of the spoiler 400 is connected to the second end of another adjacent spoiler 400 to form a spoiler group 41 with a serpentine structure. The spoiler group 41 with a serpentine structure further improves the turbulence effect on the heat exchange medium, so that when the heat exchange medium flows through the spoiler group 41, it is forced to flow along a more complex path, thereby generating a strong heat exchange medium disturbance. This complex heat exchange medium disturbance makes the velocity distribution of the heat exchange medium in the cooling cavity 3201 more uniform, reduces the generation of heat exchange medium stratification and vortex, thereby reducing fluid resistance, and plays a regulating role in the flow rate and flow path of the heat exchange medium in the cooling part 320, thereby improving the heat exchange effect of the cooling part 320.

[0076] In some embodiments, a first end of a spoiler 400 is connected to a second end of another adjacent spoiler 400 via a bending portion 401 . The bending portion 401 includes a plurality of rings arranged along a bending curve and connected in sequence.

[0077] Furthermore, in an N-stage series structure of cooling sections 320, the length of the spoilers 400 in the cooling section 320 with a larger number of stages is greater than or equal to the length of the spoilers 400 in the cooling section 320 with a smaller number of stages. For example, in some embodiments, the total length of the spoilers 400 in the first cooling section 321 is less than the total length of the spoilers 400 in the second cooling section 322, the total length of the spoilers 400 in the second cooling section 322 is less than the total length of the spoilers 400 in the third cooling section 323, and the total length of the spoilers 400 in the third cooling section 323 is equal to the total length of the spoilers 400 in the fourth cooling section 324. That is, in the direction of liquid flow, the total length of the spoilers 400 in the subsequent cooling section 320 is greater than or equal to the total length of the spoilers 400 in the preceding cooling section 320. The total length of the spoiler 400 in the cooling section 320 that is located later in the liquid flow direction is increased to enhance the spoiler effect of the spoiler group 41 in the cooling section 320 on the heat exchange medium, thereby improving the heat exchange efficiency of the cooling section 320 for the IGBT module 510, and avoiding the heat exchange efficiency of the cooling section 320 that is located later in the sequence to be reduced due to the temperature increase of the heat exchange medium that has undergone heat exchange, which makes it difficult to effectively cool down the corresponding IGBT module 510, thereby causing uneven temperature distribution in the energy storage inverter and reducing the performance of the energy storage inverter.

[0078] Furthermore, the spiral structure of the spoiler 400 itself has high structural strength and rigidity, which can better resist the impact and vibration of the heat exchange medium flow. At the same time, the bending structure connecting adjacent spoilers 400 in the serpentine structure of the spoiler group 41 also increases the flexibility and buffering capacity of the overall structure of the spoiler group 41. When subjected to the impact and vibration of the heat exchange medium, the spoiler group 41 can absorb and dissipate energy through its own deformation, further improving the stability of the overall structure of the spoiler group 41.

[0079] Furthermore, the ring body is made of an elastic material. The ring body includes at least one of rubber, elastic metal, or elastic plastic. The elastic ring body imparts a certain degree of elasticity to the spoiler 400. The elasticity of the spoiler 400 disperses the fluid action of the heat exchange medium on the spoiler 400 in multiple directions and locations, avoiding concentrated force. This reduces the pressure locally on the spoiler 400, reduces the risk of structural deformation or even damage to the spoiler 400, and improves the stability and reliability of the spoiler 400.

[0080] In some embodiments, the spoiler 400 has a first side and a second side facing each other in the height direction Z, and the cooling portion 320 has an upper sidewall and a lower sidewall facing each other. The first side of the spoiler 400 abuts against the upper sidewall of the cooling portion 320, and the second side of the spoiler 400 abuts against the lower sidewall of the cooling portion 320. That is, the spoiler 400 is supported and connected between the upper and lower sidewalls of the cooling portion 320. This allows the spoiler 400 to support the cooling portion 320, reducing the risk of deformation or even damage to the cooling portion 320 due to external forces. Furthermore, the spoiler 400 lifts the upper sidewall of the cooling portion 320, forcing the upper sidewall of the cooling portion 320 to closely contact the circuit board 530 corresponding to the IGBT module 510, thereby avoiding the problem of poor heat exchange due to poor contact between the cooling portion 320 and the component being cooled.

[0081] Furthermore, a liquid inlet flow spoiler 410 is provided in the liquid inlet pipe 311 of the cooling pipe 310. The extension direction of the liquid inlet flow spoiler 410 matches the extension direction of the liquid inlet pipe 311. The provision of the liquid inlet flow spoiler 410 increases its internal flow resistance, reducing the flow rate of the heat exchange medium flowing through the liquid inlet pipe 311. The liquid inlet flow spoiler 410 regulates the flow rate of the heat exchange medium. Reducing the flow rate of the heat exchange medium increases the transit time of the heat exchange medium through the cooling portion 320, thereby improving the heat exchange efficiency of the liquid cooling assembly 300.

[0082] The structures of the liquid inlet spoiler 410 and the serial spoiler 420 are the same as that of the spoiler 400 . Both the liquid inlet spoiler 410 and the serial spoiler 420 are formed by sequentially connecting a plurality of rings.

[0083] Combine Figure 6 、 Figure 8 As shown, further, a series spoiler 420 is provided in the connecting pipe 313 between the first cooling part 321 and the second cooling part 322 and the connecting pipe 313 between the second cooling part 322 and the third cooling part 323. The liquid inlet spoiler 410, the spoiler 400 in the first cooling part 321, the series spoiler 420, the spoiler 400 in the second cooling part 322 and the series spoiler 420 are connected in sequence to form an integrated liquid inlet end spoiler group 42. The liquid inlet end spoiler group 42 increases the flow resistance and reduces the flow rate of the heat exchange medium just entering the liquid cooling component 300, thereby extending the passage time of the heat exchange medium in the cooling part 320, thereby improving the heat exchange effect of the liquid cooling component 300.

[0084] The integrated structure of the liquid inlet end spoiler assembly 42 prevents the liquid inlet spoiler 410 in the liquid inlet pipe 311 from being impacted by the heat exchange medium and displaced into the first cooling portion 321, thereby ensuring that the liquid inlet spoiler 410 functions to increase flow resistance and reduce the flow velocity of the heat exchange medium. Furthermore, the liquid inlet end spoiler assembly 42 can be integrated into the cooling portion 320 and the cooling pipe 310 during installation, simplifying the production process and thereby reducing the production cost of the energy storage converter.

[0085] Furthermore, the outer diameter of the liquid inlet spoiler 410 is adapted to the inner diameter of the liquid inlet pipe 311 to improve the disruptive effect of the liquid inlet spoiler 410 on the heat exchange medium initially entering the liquid cooling assembly 300 and reduce the flow rate of the heat exchange medium.

[0086] Furthermore, the ring body includes a linear ring body or a sheet-like ring body.

[0087] The linear ring body is a ring-shaped wire structure. The spoiler 400 composed of several linear ring bodies has a good effect of increasing internal resistance, thereby reducing the flow rate of the heat exchange medium, extending the time for the heat exchange medium to pass, and thus improving the heat exchange efficiency.

[0088] In some embodiments, the linear ring body has a diameter φ1, which satisfies 1.5 mm ≤ φ1 ≤ 2.5 mm. Preferably, 1.7 mm ≤ φ1 ≤ 2.3 mm. The diameter φ1 of the linear ring body can be 1.7 mm, 1.9 mm, 2.1 mm, or 2.3 mm.

[0089] In some embodiments, the linear ring body has an outer diameter φ2, which satisfies 15 mm ≤ φ2 ≤ 20 mm. Preferably, 16 mm ≤ φ2 ≤ 19 mm. The outer diameter φ2 of the linear ring body can be 16 mm, 17 mm, 18 mm, or 19 mm.

[0090] In some embodiments, the linear ring body has a first pitch t1, which satisfies 8 mm ≤ t1 ≤ 11 mm. Preferably, 8.5 mm ≤ t1 ≤ 10.5 mm. The first pitch t1 of the linear ring body can be 8.5 mm, 9 mm, 10 mm, or 10.5 mm.

[0091] The lamellae rings are thin, annular structures. The spoiler 400, comprised of several lamellae rings, effectively guides the heat exchange medium, forcing it to flow along its surface. This allows the medium to remain attached to the spoiler 400 for a longer period of time, helping to reduce stratification and pressure resistance, while also ensuring a uniform flow rate and velocity of the heat exchange medium passing through the spoiler 400. The spoiler 400, comprised of several lamellae rings, controls the flow direction of the heat exchange medium while minimizing flow resistance, ensuring that the heat exchange medium within the cooling section 320 rotates and advances along its surface.

[0092] In some embodiments, the sheet-like ring body has a radius r1 that satisfies 6 mm ≤ r1 ≤ 10 mm. Preferably, 7 mm ≤ r1 ≤ 9 mm. The radius r1 of the sheet-like ring body can be 7 mm, 7.5 mm, 8 mm, or 8.5 mm.

[0093] In some embodiments, the sheet-like ring body has a thickness t1 that satisfies 0.2 mm ≤ t ≤ 0.3 mm. Preferably, 0.22 mm ≤ t ≤ 0.28 mm. The thickness t1 of the sheet-like ring body can be 0.22 mm, 0.24 mm, 0.26 mm, or 0.28 mm.

[0094] In some embodiments, the sheet-like ring body has a second pitch t2, which satisfies 6mm≤t2≤10mm. Preferably, 7mm≤r1≤9mm. The second pitch t2 of the sheet-like ring body can be 7mm, 7.5mm, 8mm or 8.5mm.

[0095] Furthermore, the rings in the liquid inlet spoiler assembly 42 are linear rings. Specifically, the liquid inlet spoiler 410, the series spoiler 420, and the spoiler 400 in the liquid inlet spoiler assembly 42 are all formed from linear rings. The linear rings in the liquid inlet spoiler assembly 42 increase flow resistance, reducing the flow rate of the heat exchange medium initially entering the flow channel of the liquid cooling assembly 300. This prolongs the time the heat exchange medium passes through the cooling portion 320, thereby improving the heat exchange efficiency of the liquid cooling assembly 300.

[0096] Furthermore, the ring body in the spoiler 400 arranged in the third cooling part 323 and the fourth cooling part 324 is a sheet-shaped ring body, so as to reduce the pressure difference resistance in the third cooling part 323 and the fourth cooling part 324, improve the effect of the spoiler 400 on uniform heat exchange medium flow and flow velocity, and cause the heat exchange medium in the third cooling part 323 and the fourth cooling part 324 in the liquid cooling component flow channel to produce a stronger heat exchange medium disturbance, thereby ensuring the heat exchange effect on the IGBT module corresponding to the cooling part 320 in the latter sequence, thereby reducing the temperature gradient between the electronic components in the energy storage inverter, making the temperature distribution more uniform, and avoiding the performance degradation of the energy storage inverter due to its internal temperature being too high or uneven.

[0097] Combine Figure 5 、 Figure 6 As shown, the component cooling channel includes a plurality of shunt pipes 341 extending along the length direction Y. The plurality of shunt pipes 341 are arranged at equal intervals along the length direction Y. A plurality of inductors 520 are evenly installed on the component cooling channel 340 along the length direction Y. The component cooling channel 340 is connected in series between the temperature control structure and the liquid outlet pipe 312 to cool the inductors 520. Because the IGBT module 510 generates more heat than the inductor 520, the component cooling channel 340 for cooling the inductor 520 is connected in series after the temperature control structure for cooling the IGBT module 510 in the direction of liquid flow. This allows the heat exchange medium, which has a lower initial temperature, to preferentially cool the IGBT module 510, thereby achieving a uniform temperature distribution within the energy storage converter and preventing performance degradation of the energy storage converter due to uneven temperature.

[0098] Furthermore, the component cooling channel 340 includes a plurality of series flow pipes 342 extending along the length direction Y. The series flow pipes 342 sequentially connect the equally spaced branch pipes 341. The series flow pipes 342 mix the heat exchange medium after flowing through the branch pipes 341 for a certain distance, so as to avoid the branch pipes 341 being too long or the component cooling channel 340 being uneven in heat exchange, thereby preventing the temperature difference between the heat exchange media in different branch pipes 341, thereby avoiding the problem of poor heat exchange effect of the component cooling channel 340 on some inductors 520 or some areas of the inductor 520.

[0099] Combine Figure 4 、 Figure 9 As shown, Figure 9A schematic diagram of the structure of a tray 200 in an energy storage converter provided by an embodiment of the present application is shown. In the height direction Z, the tray 200 has a first side and a second side facing each other. The side of the tray 200 facing the liquid cooling assembly 300 is the first side, and the side of the tray 200 facing the base plate 111 is the second side. The tray 200 is mounted on the side of the base plate 111 facing the chamber. A mounting groove 210 is provided on the surface of the first side of the tray 200. The mounting groove 210 is adapted to fit the liquid cooling assembly 300, which is embedded in the mounting groove 210. The tray 200 is fixedly mounted on the base plate 111 of the bottom shell 110, and the liquid cooling assembly 300 is embedded in the mounting groove 210 of the tray 200. The tray 200 supports and limits the liquid cooling assembly 300, preventing it from shaking within the housing 100, which could cause the liquid cooling assembly 300 to become loose from its heat dissipation target and thus lead to poor heat dissipation.

[0100] A liquid inlet connector 131 and a liquid outlet connector 132 are provided on a side panel 112 of the bottom housing 110, opposite the liquid inlet end of the liquid inlet pipe 311 and the liquid outlet end of the liquid outlet pipe 312. The liquid inlet connector 131 and the liquid outlet connector 132 are connected to the liquid cooling assembly 300 via hoses 140. The liquid inlet connector 131 and the liquid outlet connector 132 are used to connect the liquid cooling assembly 300 inside the housing 100 with devices such as a water pump and a cooling tank located outside the housing 100. The cooled heat exchange structure is transported to the cooling assembly via the liquid inlet connector 131, and the heat exchange medium is then transported to devices such as the water pump and the cooling tank located outside the housing 100 for pressurization or cooling via the liquid outlet connector 132.

[0101] The mounting slot 210 includes a liquid inlet slot 2111 for mounting a liquid inlet pipe 311, a liquid outlet slot 2112 for mounting a liquid outlet pipe 312, a connecting slot 2113 for mounting a connecting pipe 313, a cooling slot 212 for mounting a cooling unit 320, and a cooling channel slot 214 for mounting a component cooling channel 340. The liquid inlet slot 2111 and the liquid outlet slot 2112 are both slot structures extending along a predetermined direction X to the edge of the tray 200, facilitating connection between the liquid inlet pipe 311 and the liquid outlet pipe 312 and the liquid inlet connector 131 and the liquid outlet connector 132 disposed on the same side of the side panel 112 as the bottom shell 110.

[0102] Furthermore, the material of the tray 200 includes any one of plastic, rubber, or fiberglass. The tray 200 made of the above materials has the characteristics of strong plasticity and low thermal conductivity, so that the mounting slot 210 of the tray 200 can be plastically formed into a structure compatible with the liquid cooling assembly 300 while reducing the heat exchange between the tray 200 and the liquid cooling assembly 300, thereby improving the heat exchange efficiency between the liquid cooling assembly 300 and the electronic components.

[0103] Furthermore, the second side of the tray 200 has a weight-reducing groove compatible with the mounting groove 210. This groove serves to reduce the weight of the tray 200 and reduce the material consumption required to produce the tray 200, thereby reducing the weight and production cost of the energy storage inverter. In the height direction Z, the weight-reducing groove and the mounting groove 210 are interlaced, further reducing the weight and thickness of the tray 200 in the height direction Z, thereby reducing the weight and production cost of the energy storage inverter.

[0104] Furthermore, a number of reinforcing ribs are provided in the weight-reducing grooves to improve the structural strength of the tray 200 , avoid a reduction in the structural strength of the tray 200 due to the provision of the weight-reducing grooves, and ensure the supporting and limiting effect of the tray 200 on the liquid cooling assembly 300 .

[0105] Furthermore, the cross-sections of the liquid inlet pipe 311 and the liquid outlet pipe 312 include any of a circular shape, an elliptical shape, or a quasi-elliptical shape.

[0106] In some embodiments, the cross-section of the liquid inlet pipe and the liquid outlet pipe 312 is an elliptical shape with curved surfaces on the upper and lower sides and flat surfaces on the left and right sides. The liquid inlet pipe 311 and the liquid outlet pipe 312 with this cross-sectional structure have flat sides that can better fit with the side walls of the mounting groove 210, thereby improving the limiting effect of the mounting groove 210 of the tray 200 on the liquid inlet pipe 311 and the liquid outlet pipe 312, preventing the liquid cooling component 300 from shaking laterally in the mounting groove 210, causing the liquid cooling component 300 to loosen from its heat dissipation target, and thus causing poor heat dissipation.

[0107] Correspondingly, another embodiment of the present application further provides an energy storage system, comprising a battery pack and an energy storage converter, wherein the battery pack is formed by connecting a plurality of secondary batteries, and the energy storage converter is electrically connected to the battery pack. The energy storage converter is the same as that provided in the above embodiment. It should be noted that parts identical or corresponding to the above embodiment are not repeated here.

[0108] Those skilled in the art will appreciate that the above-described embodiments are specific examples for implementing the present application, and that in actual applications, various changes in form and detail may be made thereto without departing from the spirit and scope of the present application. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. An energy storage converter, characterized in that: include: an upper shell (120) and a bottom shell (110), wherein the upper shell (120) and the bottom shell (110) form a chamber; an inductor (520) and an IGBT module (510), wherein the inductor (520) and the IGBT module (510) are located in the cavity; A liquid cooling component (300), the liquid cooling component (300) is located on the bottom shell (110), and the liquid cooling component (300) comprises: a plurality of cooling pipes (310); A temperature regulating structure, the temperature regulating structure comprising a plurality of cooling parts (320), the cooling parts (320) being connected in series and parallel via cooling pipes (310); a cooling cavity (3201) being provided in the cooling part (320), the cooling cavity (3201) of the cooling part (320) having a water inlet and a water outlet; the IGBT module (510) corresponding to the cooling part (320); at least one element cooling channel (340), the element cooling channel (340) and the temperature adjustment structure being connected in series via the cooling pipe (310); the inductor (520) corresponding to the element cooling channel (340); A spoiler (400), the spoiler (400) comprising a plurality of ring bodies connected to each other, the spoiler (400) being arranged in the cooling cavity (3201); one of the liquid inlet direction of the water inlet or the liquid outlet direction of the water outlet being perpendicular to the extension direction of the spoiler (400); Wherein, in the liquid flow direction, the total length of the spoiler (400) in the latter cooling portion (320) is greater than or equal to the total length of the spoiler (400) in the former cooling portion (320); and the liquid flow direction is the flow direction of the heat exchange medium in the liquid cooling component (300).

2. The energy storage converter according to claim 1, characterized in that: At least two of the spoilers (400) are arranged in the cooling cavity (3201), and the spoilers (400) are sequentially connected in series along a path from the water inlet to the water outlet to form a spoiler group (41).

3. The energy storage converter according to claim 2, characterized in that: The spoiler (400) extends along a preset direction, and a plurality of the spoilers (400) are arranged side by side in the cooling portion (320), with adjacent spoilers (400) being connected in series end to end.

4. The energy storage converter according to claim 1, characterized in that: In the height direction, the spoiler (400) has a first side and a second side opposite to each other, and the cooling portion (320) has an upper side wall and a lower side wall opposite to each other; the first side and the second side are in contact with and connected to the upper side wall and the lower side wall respectively.

5. The energy storage converter according to claim 1, characterized in that: The ring body includes a linear ring body or a sheet-shaped ring body.

6. The energy storage converter according to claim 5, characterized in that: The linear diameter φ1 of the linear ring body, the outer diameter φ2 of the linear ring body, and the first pitch t1 of the linear ring body satisfy the following conditions: 1.5 mm ≤ φ1 ≤ 2.5 mm, 15 mm ≤ φ2 ≤ 20 mm, and 8 mm ≤ t1 ≤ 11 mm; The radius r1 of the sheet-like ring body, the thickness t of the sheet-like ring body, and the second pitch t2 of the sheet-like ring body satisfy 6mm≤r1≤10mm, 0.2mm≤t≤0.3mm, and 6mm≤t2≤10mm.

7. The energy storage converter according to claim 1 or 5, characterized in that: The cooling pipe (310) comprises a liquid inlet pipe (311), a liquid outlet pipe (312), and a connecting pipe (313), and adjacent cooling parts (320) are connected via the connecting pipe (313); Along the liquid flow direction, the liquid inlet pipe (311), the temperature adjustment structure, the element cooling channel (340), and the liquid outlet pipe (312) are sequentially connected in series.

8. The energy storage converter according to claim 7, characterized in that: A liquid inlet spoiler (410) is provided in the liquid inlet pipe (311), and a series spoiler (420) is provided in the cooling pipe (310) partially connected to the cooling portion (320). The liquid inlet spoiler (410), the series spoiler (420) and the spoiler (400) in the cooling portion (320) are connected to form a liquid inlet end spoiler group (42).

9. The energy storage converter according to claim 7, characterized in that: Also includes: A tray (200), wherein the tray (200) body has a first side and a second side arranged opposite to each other, the liquid cooling component (300) is arranged on the first side of the tray (200), and the bottom shell (110) is arranged on the second side of the tray (200); a mounting groove (210) adapted to the liquid cooling component (300) is provided on the surface of the first side of the tray (200), and the liquid cooling component (300) is embedded in the mounting groove (210).

10. The energy storage converter according to claim 9, characterized in that: The mounting groove (210) comprises a liquid inlet groove (2111) and a liquid outlet groove (2112) extending to the edge of the tray (200); the liquid inlet pipe (311) and the liquid outlet pipe (312) are respectively embedded in the liquid inlet groove (2111) and the liquid outlet groove (2112); the liquid inlet pipe (311) has a liquid inlet at a corresponding position on the side wall of the tray (200); and the liquid outlet pipe (312) has a liquid outlet at a corresponding position on the side wall of the tray (200); The energy storage converter further comprises a liquid inlet joint (131) and a liquid outlet joint (132), wherein the liquid inlet joint (131) and the liquid outlet joint (132) are provided on the side wall of the bottom shell (110), and the liquid inlet joint (131) and the liquid outlet joint (132) are respectively communicated with the liquid inlet pipe (311) and the liquid outlet pipe (312).

11. An energy storage system, characterized in that: include: A battery pack, wherein the battery pack is formed by connecting a plurality of secondary batteries; an energy storage converter, the energy storage converter being electrically connected to the battery pack; Wherein, the energy storage system includes the energy storage converter according to any one of claims 1 to 10.

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