Power module and direct hanging type energy storage system

Abstract

The utility model discloses a power module and a direct hanging type energy storage system, and the power module comprises at least two groups of power modules which are used for connecting a cluster of batteries and are symmetrically arranged; the alternating current transmission module is connected with the alternating current side of the power module; and the direct current transmission module is connected with the direct current side of the power module. Each group of power modules manages a cluster of batteries, so that the power density in a limited space of the power module is improved, the power modules are symmetrically arranged, the space utilization is facilitated, circuit paths of the modules can be ensured to be sequentially connected, current loops are not crossed, and the friendliness of circuit performance is improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and in particular to a power module and a direct-mounted energy storage system. Background Art

[0002] Direct-mount energy storage is a new energy storage technology that uses supercapacitors as storage elements and is installed directly on the power grid. This technology not only reduces power loss but also enables rapid storage and release of electricity. With its advantages of miniaturization, convenience, stability, and high energy efficiency, direct-mount energy storage technology is widely used in new energy technologies such as smart grids, solar photovoltaic power plants, and wind power generation. Its strong energy storage and synergy capabilities can provide a driving force for the development of smart energy.

[0003] At present, direct-mounted energy storage systems mostly use power modules to manage battery cells. A power module management battery cell usually contains multiple power modules. If the power modules are not arranged in the right positions, the space of the power modules will be wasted.

[0004] Therefore, how to reasonably utilize the space within the power module to increase the layout density of the power module and improve the power density is a technical problem that needs to be solved urgently by skilled technicians. Summary of the Invention

[0005] In view of this, the present application provides a power module that rationally utilizes the space within the power module to increase the layout density of the power modules and improve the power density. In addition, the present application also provides a direct-mounted energy storage system having the above-mentioned power module.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] A power module, comprising:

[0008] A power module, the power module being used to connect a cluster of batteries, the power modules being in at least two groups, and the at least two groups of power modules being symmetrically arranged;

[0009] an AC transmission module connected to the AC side of the power module;

[0010] A DC transmission module is connected to the DC side of the power module.

[0011] Preferably, in the above-mentioned power module, all the power modules are arranged symmetrically, and the symmetry line of the power module is the center line of the power module, and the extension direction of the center line is the first direction.

[0012] Preferably, in the above-mentioned power module, the power module includes:

[0013] An IGBT module, wherein the IGBT module is located at one end of a center line of the power module, and the AC transmission module is arranged on a side of the IGBT module along a second direction, wherein the second direction is perpendicular to the center line;

[0014] a capacitor module, wherein the capacitor module and the DC transmission module are located in a middle position in the center line direction of the power module, and the capacitor module and the DC transmission module are arranged along the second direction;

[0015] The inductor module is located at the other end of the center line direction of the power module.

[0016] Preferably, in the above-mentioned power module, the IGBT modules of at least two of the power modules are integrated into one.

[0017] Preferably, in the above-mentioned power module, the IGBT module is a rectangular structure having a thickness, and the thickness of the IGBT module is arranged along a third direction, and the third direction, the second direction and the first direction are perpendicular to each other;

[0018] or,

[0019] The thickness of the IGBT module is arranged along the second direction.

[0020] Preferably, in the above-mentioned power module, the capacitor modules of at least two of the power modules are arranged symmetrically about the center line.

[0021] Preferably, in the above-mentioned power module, the DC transmission modules and the power modules are both an even number, and all the DC transmission modules are integrated into one body and located at the center of the power module along the second direction;

[0022] The capacitor modules of all the power modules are arranged symmetrically with respect to the DC transmission module.

[0023] Preferably, in the above-mentioned power module, the DC transmission modules and the power modules are both an even number, and the capacitor modules of all the power modules are symmetrically arranged on the center line, and the DC transmission modules are symmetrically arranged about the capacitor modules.

[0024] Preferably, in the above-mentioned power module, the DC transmission modules and the power modules are both odd in number, and the capacitor modules of all the power modules are arranged symmetrically about the center line.

[0025] The DC transmission module is located on both sides of all the capacitor modules along the second direction, or the DC transmission module is located between adjacent capacitor modules.

[0026] Preferably, in the above-mentioned power module, the capacitor module is placed horizontally, and the thickness of the capacitor module is arranged along a third direction, and the third direction is perpendicular to the second direction and the plane where the center line is located;

[0027] or,

[0028] The capacitor module is placed vertically, and the thickness of the capacitor module is arranged along the second direction. The third direction is perpendicular to the second direction and the plane where the center line is located.

[0029] Preferably, the above-mentioned power module further includes a fan disk, which is used to dissipate heat for the capacitor module; the fan disk is located in the middle position of the center line of the power module, one end of the fan disk is opposite to the DC transmission module, the capacitor modules are located on both sides of the fan disk, and the inductor module is located at the other end of the fan disk, and the inductor modules are arranged symmetrically about the center line.

[0030] Preferably, in the above-mentioned power module, the fan disk is located at one end of the center line of the power module away from the IGBT module, one end of the fan disk is opposite to the capacitor module, and the inductor modules are distributed on both sides of the capacitor module along the second direction.

[0031] Preferably, in the above-mentioned power module, a liquid cooling plate is integrated in the IGBT module, and a circulating liquid channel of the liquid cooling plate is arranged at the bottom of the power module.

[0032] A direct-mounted energy storage system includes a power module and a battery cluster, wherein the power module is any one of the power modules described above.

[0033] The present application discloses a power module comprising at least two groups of power modules, each symmetrically arranged. Each group of power modules manages a cluster of batteries, thereby increasing power density within the limited space of the power module. The symmetrical arrangement of the power modules facilitates space utilization and ensures that the circuit paths of each module are connected sequentially, without crossover of current loops, thereby improving circuit performance friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0035] Figure 1 This is a schematic structural diagram of the first structure of the power module disclosed in the embodiments of this application;

[0036] Figure 2 This is a schematic structural diagram of the second structure of the power module disclosed in the embodiments of this application;

[0037] Figure 3 This is a schematic structural diagram of the third structure of the power module disclosed in the embodiments of this application;

[0038] Figure 4 Schematic diagram of the fourth structure of the power module disclosed in the embodiments of this application;

[0039] Figure 5 Schematic diagram of the fifth structure of the power module disclosed in the embodiments of this application;

[0040] in,

[0041] 1 is the AC module, 2 is the IGBT module, 21 is the liquid cooling plate, 3 is the DC module, 4 is the capacitor module, 5 is the fan disk, and 6 is the inductor module. DETAILED DESCRIPTION

[0042] This application discloses a power module that rationally utilizes the space within the power module to increase the layout density of the power modules and improve the power density. In addition, this application also discloses a direct-mounted energy storage system having the above-mentioned power module.

[0043] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] Direct-mount energy storage systems often use power modules to manage battery cells. Each power module consists of power modules such as IGBTs, capacitors, and inductors, as well as AC modules (also known as AC transmission modules) and DC modules (also known as DC transmission modules). Typically, each power module manages a cluster of battery cells. For power modules with multiple power modules, improper module placement can lead to wasted space.

[0045] Based on this, the present application discloses a power module, which improves the utilization rate of the space within the power module and increases the power density by rationally arranging the power modules.

[0046] The number of power modules can be set based on specific needs, with each power module managing a battery cell cluster. It should be noted that a battery cell cluster includes, but is not limited to, multiple batteries connected in series. As the number of power modules increases, their placement within the module affects the module's space utilization, and thus, the power density.

[0047] In this application, at least two power modules are arranged symmetrically, resulting in a symmetrical distribution of the power circuits of the power modules. Furthermore, the modules within the power module are arranged sequentially to achieve sequential connection of the module circuits, rationally distribute the space, and reduce the circuit path, which is conducive to improving the friendliness of circuit performance. In some embodiments, all power modules in the power module are arranged symmetrically.

[0048] Specifically, refer to the accompanying drawings for a detailed description of the arrangement of each module in the power module. It should be noted that the accompanying drawings below only describe the power module with two groups of power modules. For the arrangement of power modules with other numbers of power modules, please refer to the description below.

[0049] like Figure 1 The power module shown includes an AC module 1 , an IGBT module 2 , a DC module 3 , a capacitor module 4 , a fan unit 5 and an inductor module 6 .

[0050] There are two AC modules 1, both located at the same end of the power module in a first direction. The connection direction of the two AC modules 1 is a second direction that intersects the first direction. For example, the first and second directions are perpendicular. The AC modules 1 primarily integrate switching devices and input and output busbars, facilitating cascading of the power module with other power modules on the AC side.

[0051] The IGBT module 2 and AC module 1 are located at the same end. The IGBT modules 2 of all power modules are integrated and located between the two AC modules 1. The AC modules 1 are arranged symmetrically about the centerline. The distance between the AC module 1 and the IGBT module 2 can be set according to different needs. Specifically, the distance between the IGBT module 2 and the AC module 1 can be minimized within the required range to reduce the space occupied by the power module. The centerline in this article refers to the center position of the power module along the second direction, and the centerline is parallel to the first direction.

[0052] It should be noted that the IGBT module 2 disclosed in the embodiment of the present application is a structure having a thickness. Exemplarily, the IGBT module 2 is a rectangular structure having a thickness.

[0053] Figure 1The thickness of the IGBT module 2 is arranged along the third direction. This means that the IGBT module 2 is placed horizontally within the power module. The third direction, the first direction, and the second direction are mutually perpendicular, forming a three-dimensional coordinate system. When the thickness of the IGBT module 2 is arranged along the third direction, the two side surfaces of the IGBT module 2 arranged along the second direction face the AC module 1.

[0054] It should be noted that the IGBT module 2 referred to in the figures herein is an IGBT module 2 in which multiple power modules can be integrated and arranged within the illustrated position. The IGBT module 2 is a power device that performs electrical energy conversion. It can be understood that the IGBT modules 2 of multiple power modules integrated within the same space are the IGBT modules 2 shown in the figure.

[0055] The IGBT modules 2 of all power modules may be arranged along the second direction or along the first direction. Exemplarily, the IGBT modules 2 are arranged symmetrically along the center line.

[0056] In some embodiments, each IGBT module 2 primarily integrates a liquid cooling plate 21, IGBTs, and AC busbars. For example, the AC side of the IGBT is connected to the input and output busbars of the AC module 1 via the AC busbars, utilizing the IGBTs for power conversion. The switching components of the AC module 1 are located on the input and output busbars. The liquid cooling plate 21 is connected to the IGBTs to dissipate heat and ensure proper operation of the IGBT module 2. The arrangement of the liquid cooling plate 21 and the IGBTs can be customized to meet specific needs.

[0057] DC module 3 is located in the middle of the power module along the second direction. For example, DC module 3 is symmetrical about the centerline and can consist of two DC sub-modules integrated into the same location. One end of DC module 3 along the first direction faces IGBT module 2. It can be understood that the line connecting DC module 3 and IGBT module 2 is parallel to the first direction. The two DC sub-modules within DC module 3 can be arranged along either the first or second direction. DC module 3 is constructed as a single unit for ease of installation.

[0058] In some embodiments, the DC sub-module primarily integrates a DC module support plate, fuses, and relays. Specifically, the relay is connected to the DC side of the IGBT of the corresponding IGBT module 2, and the fuse is connected in series with the relay to provide overload protection. Exemplarily, the DC module support plate serves as a mounting base for other components.

[0059] There are two capacitor modules 4 , which are symmetrically arranged about the DC module 3 , that is, symmetrical about the center line. The connection direction of the two capacitor modules 4 is the second direction. Figure 1In the illustrated embodiment, the capacitor module 4 has a rectangular structure, with the thickness of the capacitor module 4 arranged along the second direction, the width of the capacitor module 4 arranged along the third direction, and the length of the capacitor module 4 along the first direction, wherein the width of the capacitor module 4 is smaller than the length of the capacitor module 4. This arrangement of the capacitor module 4 allows for the use of a corresponding circuit connection structure and reduces the size of the power module along the second direction, thereby further conserving space in the power module along the second direction.

[0060] In some embodiments, the capacitor module 4 is opposite to the AC module 1, that is, the connection line between the capacitor module 4 and the AC module 1 is along the first direction. The capacitor module 4 is located on the rear side of the AC module 1 and can be used to filter and stabilize the current on the AC side. Optionally, the capacitor module 4 includes a capacitor, a capacitor support plate, a capacitor copper busbar connecting busbar, a windshield, etc. The capacitor is connected to the AC module 1 on the corresponding side through the capacitor copper busbar connecting busbar. For example, the capacitor is connected between the AC module 1 and the IGBT module 2 to utilize the capacitor to filter and stabilize the current on the AC side.

[0061] The capacitor support plate can serve as a mounting base for mounting other components in the capacitor module 4 , and the shape and size of the capacitor support plate are not specifically limited.

[0062] The fan disk 5 is located in the middle of the center line of the power module, one end of the fan disk 5 is opposite to the DC module 3, and the capacitor module 4 is located on both sides of the fan disk 5, so that the fan disk 5 is used to blow air to dissipate heat for the capacitor module 4, thereby preventing the temperature of the capacitor module 4 from being too high and affecting the normal operation of the circuit. Figure 1 The inductance module 6 is located at the other end of the fan disk 5, and the inductance module 6 is arranged symmetrically about the center line.

[0063] The windshield of the capacitor module 4 is used to shield the wind disk 5 and guide the wind of the wind disk 5. The shape and size of the windshield are not specifically limited.

[0064] There are two inductance modules 6, and they are arranged one by one opposite to the capacitance modules 4. The two inductance modules 6 are arranged symmetrically about the DC module 3, that is, symmetrically about the center line. Figure 1 As shown, the IGBT module 2, the DC module 3 and the fan disk 5 are arranged along the first direction to form an intermediate structure. In some embodiments, the water inlet pipe and the water outlet pipe of the liquid cooling plate 21 of the IGBT module 2 enter and exit through the reserved channel at the bottom of the DC module 3. It can be understood that the circulating liquid channel of the liquid cooling plate 21 is set at the bottom of the power module; the two AC modules 1 are distributed on both sides of the intermediate structure, the two capacitor modules 4 are distributed on both sides of the intermediate structure, and the two inductor modules 6 are distributed on both sides of the intermediate structure.

[0065] Figure 1The width direction of the inductor module 6 is along the first direction, and the length direction of the inductor module 6 is along the second direction, so as to reduce the size of the power module in the second direction and better save the space of the power module in the second direction. For example, the two inductor modules 6 can be arranged opposite or back to back.

[0066] In some embodiments, the inductor module 6 includes an inductor, an inductor support plate, and a connecting copper busbar. Exemplarily, the inductor is connected to the DC module 3 via the connecting copper busbar, and to the battery cells via the connecting copper busbar, to filter the DC side current and obtain the desired current. The inductor support plate serves as a mounting base for other components within the inductor module 6. The shape and size of the inductor support plate are not specifically limited.

[0067] Combined with the above arrangement, Figure 1 In the illustrated embodiment, the IGBT module 2 of the power module is located in the center of the power module, and multiple IGBT modules 2 are integrated into a single unit, resulting in a compact structure. The capacitor module 4 and inductor module 6 are symmetrically arranged about the IGBT module 2, ensuring a uniform and rational layout of the modules. Furthermore, the positioning of the AC module 1 and DC module 3 within the power module allows for sequential connection of the module circuits, facilitating improved circuit performance and user-friendliness.

[0068] In addition, each module in the power module of the present application is assembled separately and then connected as a whole, which has a high degree of modular integration and further improves space utilization.

[0069] like Figure 2 The power module shown is Figure 1 In the power modules shown, the number and arrangement of the modules are the same, the difference is that: Figure 2 The capacitor module 4 of the power module is placed upright, that is, the thickness of the IGBT module 2 is arranged along the second direction, and the two side surfaces of the IGBT module 2 along the thickness direction face the AC module 1 respectively.

[0070] The capacitor module 4 adopts the above arrangement and can use the corresponding circuit connection structure, and can make the size of the power module along the third direction smaller, better save the space of the power module in the third direction, and make installation and maintenance more convenient.

[0071] It will be understood by those skilled in the art that Figure 1 and Figure 2 The power modules shown in the figure all show two groups of power modules. Therefore, for the arrangement of other even groups of power modules, refer to the above arrangement. For example, when there are four IGBT modules 2, the four IGBT modules 2 are all integrated in Figure 1 and Figure 2The position of the IGBT module 2 is shown in FIG, and is evenly arranged along the second direction and symmetrically about the center line; when there are four capacitor modules 4 and four inductor modules 6, the four capacitor modules 4 are arranged along the second direction and about Figure 1 The DC modules 3 are arranged symmetrically, and the four inductance modules 6 are arranged along the second direction and symmetrically about the center line.

[0072] In the above example, four DC submodules are integrated into the DC module 3, which can also be arranged along the second direction and symmetrically about the center line. There are four AC modules 1, which are arranged symmetrically about the IGBT module 2 and along the second direction.

[0073] When the power module includes an odd number of power modules, each module can be arranged symmetrically about the module in the middle, and the core is also the symmetrical arrangement of each module about the center line of the power module. For example, when there are three power modules, there are three IGBT modules 2, and the three IGBT modules 2 are all integrated in Figure 1 and Figure 2 The IGBT modules 2 are positioned as shown in the figure and are evenly arranged along the second direction so that the center line passes through the IGBT module 2 at the middle position, and the other two IGBT modules 2 are symmetrical about the IGBT module 2 at the middle position.

[0074] When there are three inductance modules 6, the three inductance modules 6 are arranged along the second direction and symmetrically about the center line; when there are three capacitance modules 4, the three capacitance modules 4 are arranged along the second direction and symmetrically about the center line. Figure 1 The center line is arranged symmetrically.

[0075] In the above example, the DC modules 3 can be arranged at intervals between adjacent capacitor modules 4 . The DC modules 3 can be arranged along the second direction and do not need to be symmetrical about the central axis. There are three AC modules 1 , which are distributed on both sides of the IGBT module 2 .

[0076] In summary, when the power modules herein are 2N, and N is 1, 2, 3, ..., i.e., an even number of power modules, the modules in the power module are arranged sequentially along the second direction and are symmetrical about the centerline. When the power modules are 2N+1, and N is 1, 2, 3, ..., i.e., an odd number of power modules, the modules in the power module are arranged sequentially along the second direction and are symmetrical about the middle power module in the second direction, i.e., also symmetrical about the centerline.

[0077] In addition, other arrangements are disclosed in this application, such as Figure 3 The power module shown includes an AC module 1 , an IGBT module 2 , a DC module 3 , a capacitor module 4 , a fan unit 5 and an inductor module 6 .

[0078] Among them, the functions and structures of AC module 1, IGBT module 2, DC module 3, capacitor module 4, fan disk 5 and inductor module 6 are respectively Figure 1 The functions and structures of the corresponding modules in the power modules are the same.

[0079] The difference is that Figure 3 There are two DC modules 3, located between the two capacitor modules 4. The inductor modules 6 are located on either side of the capacitor module 4, with the inductor modules 6 and DC modules 3 on the same side arranged along a first direction. The AC module 1 is located at the front of the DC module 3 along the first direction, and the inductor module 6 is located at the rear of the DC module 3 along the first direction. The fan unit 5 is located at the end of the power module's centerline away from the IGBT module 2, with one end of the fan unit 5 facing the capacitor module 4. The inductor modules 6 are distributed on both sides of the capacitor module 4 along a second direction.

[0080] Figure 3 The width direction of the inductor module 6 is along the second direction, and the length direction of the inductor module 6 is along the first direction, so as to reduce the size of the power module in the first direction and better save the space of the power module in the first direction. For example, the two inductor modules 6 can be arranged opposite or back to back.

[0081] In an optional embodiment, the capacitor module 4 can be as follows Figure 2 The arrangement of the capacitor module 4 is shown and is within the protection range.

[0082] In some embodiments, the arrangement of the IGBT modules 2 may be changed, such as Figure 4 As shown, the IGBT module 2 is placed upright in the power module, that is, the thickness of the IGBT module 2 is arranged along the second direction. Exemplarily, the width of the IGBT module 2 is along the first direction, the length of the IGBT module 2 is along the second direction, and the width of the IGBT module 2 is smaller than the length of the IGBT module 2.

[0083] The IGBT module 2 is placed vertically, which can save the front space of the power module. The IGBTs are placed on both sides of the liquid cooling plate 21, which maximizes the use area of ​​the liquid cooling plate 21 and greatly reduces the heat dissipation cost.

[0084] It will be understood by those skilled in the art that Figure 3 and Figure 4 The power modules shown in the figure all show two groups of power modules. Therefore, for the arrangement of other even groups of power modules, refer to the above arrangement. For example, when there are four IGBT modules 2, the four IGBT modules 2 are all integrated in Figure 3 and Figure 4The position of the IGBT module 2 is shown in the figure, and is evenly arranged along the third direction and symmetrically about the center line; when there are four capacitor modules 4 and four inductor modules 6, the four capacitor modules 4 are arranged along the second direction and symmetrically about the center line, and the four inductor modules 6 are arranged along the second direction and symmetrically about the center line.

[0085] In the above example, the two DC modules 3 can each be integrated with two DC sub-modules, and these two DC sub-modules can also be arranged along the first direction or along the second direction. There are four AC modules 1, which are arranged symmetrically about the IGBT module 2 and arranged along the second direction.

[0086] When the power module includes an odd number of power modules, each module can be arranged symmetrically about the module in the middle, and the core is also the symmetrical arrangement of each module about the center line of the power module. For example, when there are three power modules, there are three IGBT modules 2, and the three IGBT modules 2 are all integrated in Figure 3 and Figure 4 The IGBT modules 2 are positioned as shown in FIG, and can be evenly arranged along the third direction.

[0087] When there are three capacitor modules 4, the three capacitor modules 4 are arranged along the second direction and about Figure 3 The DC modules 3 are distributed on both sides of the capacitor module 4 and are arranged asymmetrically.

[0088] When there are three inductor modules 6 , one inductor module 6 may be arranged on the center line, and the remaining inductor modules 6 are symmetrically arranged on both sides of the capacitor module 4 .

[0089] There are three AC modules 1 , which are distributed on both sides of the IGBT module 2 .

[0090] In summary, when the power modules herein are 2N, and N is 1, 2, 3, ..., i.e., an even number of power modules, the modules in the power module are arranged sequentially along the second direction and are symmetrical about the centerline. When the power modules are 2N+1, and N is 1, 2, 3, ..., i.e., an odd number of power modules, the modules in the power module are arranged sequentially along the second direction and are symmetrical about the middle power module in the second direction, i.e., also symmetrical about the centerline.

[0091] In summary, the power modules in this article are arranged in at least two groups, symmetrically about the centerline of the power module. Each group of power modules manages a cluster of batteries, increasing power density within the limited space of the power module. The symmetrical arrangement of the power modules within the power module facilitates space utilization and ensures sequential connection of the circuit paths of each module, preventing crossover of current loops, thereby improving circuit performance friendliness.

[0092] Each power module group in this article can be a cascade unit for managing a cluster of batteries. Setting at least two cascade units in the power module can realize the management of at least two clusters of batteries, realize the charging and discharging of the batteries and the SOC balancing management between different battery clusters.

[0093] In some embodiments, such as Figure 5 As shown, when a power module includes 2N (N = 2, 4, 6, ...) H-bridge cascade units, the power modules can be stacked in the third direction, forming a symmetrical structure for the power module's power circuit. It is understood that the multiple power modules can be stacked in the third direction or laid out in the second or first direction, as long as the power modules in each cascade unit are symmetrically arranged.

[0094] In addition, the present application also discloses a direct-mounted energy storage system, including a power module and a battery cluster, wherein the power module is the power module disclosed in the above embodiment. Therefore, the direct-mounted energy storage system with this power module also has all the above technical effects, which will not be repeated here.

[0095] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0096] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power module, characterized in that: include: A power module, the power module being used to connect a cluster of batteries, the power modules being in at least two groups, and the at least two groups of power modules being symmetrically arranged; an AC transmission module connected to the AC side of the power module; a DC transmission module connected to the DC side of the power module; All the power modules are symmetrically arranged, and the symmetry line of the power module is the center line of the power module, and the extension direction of the center line is the first direction; The power module includes an IGBT module, a capacitor module, and an inductor module. The IGBT module is located at one end of the center line of the power module. The AC transmission module is arranged on the side of the IGBT module along a second direction, and the second direction is perpendicular to the center line. The capacitor module and the DC transmission module are located in the middle position in the direction of the center line of the power module, and the capacitor module and the DC transmission module are arranged along the second direction. The inductor module is located at the other end in the direction of the center line of the power module.

2. The power module according to claim 1, characterized in that: The IGBT modules of at least two of the power modules are integrated into one.

3. The power module according to claim 2, characterized in that: The IGBT module is a rectangular structure having a thickness, and the thickness of the IGBT module is arranged along a third direction, and the third direction, the second direction and the first direction are perpendicular to each other; or, The thickness of the IGBT module is arranged along the second direction.

4. The power module according to claim 1, wherein: The capacitor modules of at least two of the power modules are arranged symmetrically about the center line.

5. The power module according to claim 4, characterized in that: There are an even number of the DC transmission modules and the power modules, and all the DC transmission modules are integrated into one body and located at the center of the power module along the second direction; The capacitor modules of all the power modules are arranged symmetrically with respect to the DC transmission module.

6. The power module according to claim 4, characterized in that: The DC transmission modules and the power modules are both in even number, and the capacitor modules of all the power modules are symmetrically arranged on the center line, and the DC transmission modules are symmetrically arranged with respect to the capacitor modules.

7. The power module according to claim 4, characterized in that: The DC transmission modules and the power modules are both odd in number, and the capacitor modules of all the power modules are arranged symmetrically about the center line. The DC transmission module is located on both sides of all the capacitor modules along the second direction, or the DC transmission module is located between adjacent capacitor modules.

8. The power module according to any one of claims 1 to 7, characterized in that: The capacitor module is placed flat, and the thickness of the capacitor module is arranged along a third direction, and the third direction is perpendicular to the second direction and the plane where the center line is located; or, The capacitor module is placed vertically, and the thickness of the capacitor module is arranged along the second direction. The third direction is perpendicular to the second direction and the plane where the center line is located.

9. The power module according to any one of claims 1 to 7, characterized in that: It also includes an air tray, which is used to dissipate heat for the capacitor module; The fan disk is located in the middle of the center line of the power module, one end of the fan disk is opposite to the DC transmission module, the capacitor modules are located on both sides of the fan disk, the inductor module is located at the other end of the fan disk, and the inductor modules are arranged symmetrically about the center line.

10. The power module according to claim 9, characterized in that: The fan disc is located at one end of the center line of the power module away from the IGBT module, one end of the fan disc is opposite to the capacitor module, and the inductor modules are distributed on both sides of the capacitor module along the second direction.

11. The power module according to any one of claims 1 to 6, characterized in that: A liquid cooling plate is integrated in the IGBT module, and a circulating liquid channel of the liquid cooling plate is arranged at the bottom of the power module.

12. A direct-mounted energy storage system, comprising a power module and a battery cluster, characterized in that: The power module is the power module according to any one of claims 1 to 11.

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