Liquid cooling string type energy storage and conversion all-in-one machine

Abstract

The invention relates to the technical field of electric energy storage equipment, and discloses a liquid cooling string type energy storage and conversion all-in-one machine. The invention relates to an energy storage and conversion all-in-one machine, which comprises a support frame, a converter, an alternating current switch module, a direct current switch module, a confluence busbar and a liquid cooling circulation pipeline, the converter, the alternating current switch module, the direct current switch module and the confluence busbar are respectively arranged in a converter area, an alternating current switch area, a direct current switch area and a confluence busbar area of the module frame, and the liquid cooling circulation pipeline is arranged on the support frame and is connected with a cooling flow channel of the converter. According to the energy storage and conversion all-in-one machine, the converter is cooled in a liquid cooling mode, the cooling capacity of the converter is better, the power expansion space of the converter is larger, and the converter is not prone to failure; modular design is adopted as a whole, each module can be independently maintained, and the integration level is higher; and by adopting the electrical connection of the confluence busbar, the cost advantage is better.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of electric energy storage equipment, and in particular to a liquid-cooled string-type energy storage and current conversion integrated machine. Background Art

[0002] Energy storage power stations are a key link in the "source, grid, load and storage" system. They play an important role in absorbing new energy, improving power quality, and reducing peak loads. They are vital to the establishment of a new power system.

[0003] The energy storage converter and booster integrated machine is an important component of the energy storage power station. According to the equipment composition, it is usually divided into a transformer part and a converter part. Among them, the converter part (integrated machine) is usually composed of an energy storage converter, a DC switch module, an AC switch module, high and low voltage connection devices, and a supporting structure. According to the power size of the converter, it can be divided into a centralized type and a string type.

[0004] The inventors of the present application have discovered that the current mainstream string-type integrated converters usually use air cooling to dissipate heat and cool the converter. The air flow is sucked in from the bottom of the converter and then discharged from the top or side. This air-cooled string-type integrated converter usually has defects such as complex structural design, low integration, low assembly efficiency, and difficult operation and maintenance. Summary of the invention

[0005] The object of the present invention is to provide a liquid-cooled string-type energy storage and current conversion integrated machine to solve the problems in the above-mentioned background technology.

[0006] The embodiment of the present invention provides a liquid-cooled string-type energy storage and current conversion integrated machine, comprising: a support frame, a converter, an AC switch module, a DC switch module, a busbar and a liquid cooling circulation pipeline;

[0007] The support frame is in a rectangular frame shape and is formed by connecting a plurality of module frames in the length direction;

[0008] The module frame is provided with a converter area, an AC switch area, a DC switch area and a busbar area, wherein the converter area, the AC switch area and the busbar area are arranged side by side at the upper part of the module frame, and the DC switch area is located at the bottom of the module frame;

[0009] The number of the converters, the AC switch modules and the DC switch modules corresponds to each other, and the number of the busbars corresponds to that of the module frames;

[0010] The multiple converters and the AC switch modules are respectively arranged in the converter area and the AC switch area in an upper and lower manner, the busbar is vertically arranged in the busbar area, and the multiple DC switch modules are horizontally arranged in the DC switch area;

[0011] The converter is provided with a cooling channel;

[0012] The liquid cooling circulation pipeline is arranged on the support frame, connected to the cooling channels of the plurality of converters, and the liquid cooling circulation pipeline is used to be connected to a cooling medium supply mechanism;

[0013] The DC switch module and the DC interface of the converter are respectively connected to the busbar through high-voltage wire harnesses, the high-voltage wire harness connected from the AC interface of the converter is connected to the upper interface of the AC switch module, and the high-voltage wire harness is then connected to the busbar from the lower interface of the AC switch module;

[0014] The low-voltage wire harnesses connected from the plurality of converters are connected after being merged and used for connection with the transformer;

[0015] The busbar is provided with a wiring interface for connecting to a transformer;

[0016] The DC switch module is used to connect to an external high-voltage wire harness.

[0017] Based on the above scheme, it can be known that the liquid-cooled string energy storage and converter integrated machine of the present invention is provided with a support frame, a converter, an AC switch module, a DC switch module, a busbar and a liquid cooling circulation pipeline. The support frame is connected by multiple module frames, and the module frame is provided with a converter area, an AC switch area, a DC switch area and a busbar area. Multiple converters and AC switch modules are respectively arranged in the converter area and the AC switch area, and the busbar is arranged in the busbar area. Multiple DC switch modules are arranged horizontally in the DC switch area. The converter is provided with a cooling channel, and the liquid cooling circulation pipeline is arranged on the support frame and connected to the cooling channel of the converter. The DC switch module and the DC interface of the converter are respectively connected to the busbar through a high-voltage wire harness, and the high-voltage wire harness connected from the AC interface of the converter is connected to the upper interface of the AC switch module. The high-voltage wire harness is then connected to the busbar from the lower interface of the AC switch module. The low-voltage wire harness connected from the converter is connected after merging, and the busbar is provided with a wiring interface connected to the transformer. The liquid-cooled string-type energy storage converter of the present invention is arranged above the cable trench. The external high-voltage wire harness is connected from the bottom of the converter, connected to the DC switch module, and then connected to the DC interface of each converter through the busbar. The AC wire harness connected from the AC interface of the converter is connected to the upper interface of the AC switch module. The high-voltage wire harness is connected to the busbar from the lower interface of the AC switch module, and the bottom of the busbar is provided with a wiring interface for connecting the transformer; the low-voltage wire harness is connected from the converter and then converged, and then connected from the support frame. The converter is cooled by liquid cooling, and its cooling effect and temperature control effect are better, so that the power expansion space of the converter is higher and it is not easy to fail; the overall modular design is adopted, each module can be maintained independently, and the integration is higher; the electrical connection of the busbar is adopted, which has more cost advantages.

[0018] In a feasible solution, the busbar area and the AC switch area are respectively arranged on the left and right sides of the converter area, and the busbar area, converter area, and AC switch area of ​​the plurality of module frames are arranged in sequence from left to right;

[0019] The DC switch module is arranged below the converter.

[0020] In a feasible solution, gaps are left between adjacent converters, between the AC switch modules, and between the DC switch modules.

[0021] In a feasible solution, the liquid cooling circulation pipeline includes: a primary pipeline, a secondary pipeline and a tertiary pipeline;

[0022] The primary pipeline is arranged at the top of the support frame and is used to be connected to the cooling medium supply mechanism;

[0023] The number of the secondary pipelines corresponds to the number of the module frames, and they are arranged on the side walls of the module frames and connected to the primary pipelines;

[0024] The number of the tertiary pipelines corresponds to the number of the converters. One end of the tertiary pipeline is connected to the secondary pipeline, and the other end is connected to the cooling channel of the converter.

[0025] In a feasible solution, the wiring interface is located at the bottom end of the busbar.

[0026] In a feasible solution, the high-voltage wiring harness is connected from the front side of the converter and then connected to the busbar and the AC switch module respectively;

[0027] The low-voltage wire harness is connected from the back of the converter and is connected from the top of the module frame after converging.

[0028] In a feasible solution, the high-voltage wiring harness and the low-voltage wiring harness are both connection bars.

[0029] In a feasible solution, the support frame is provided with universal wheels at four top corners of the bottom.

[0030] In a feasible solution, a lifting lug is provided at the top end of the support frame.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The converter is cooled by liquid cooling, which has better cooling effect and temperature control ability, higher power expansion space, simple structure and not easy to fail.

[0033] 2. A modular layout design is adopted to form a framework of DC switch module, AC switch module and converter. On this basis, other equipment is reasonably arranged. The AC switch module is placed on the side of the converter and the DC switch module is placed at the bottom of the converter. It has the advantages of high integration, high space utilization and easy maintenance.

[0034] 3. Universal wheels are arranged at the bottom of the support frame, which can be assembled by pushing and pulling; the DC input line is located directly below the all-in-one machine, facing the cable trench of the foundation, which is convenient for customers to connect wires.

[0035] 4. High and low voltage are divided into zones for safe isolation. The high voltage harness is connected from the bottom of the support frame and connected from the bottom; while the low voltage harness is connected from the converter and connected from the top of the support frame.

[0036] 5. The connection bar is used to realize the electrical connection between the DC switch module and the converter, and between the converter and the AC switch module, which has the advantages of easy maintenance, modular assembly and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1 It is a front view schematic diagram of a liquid-cooled string-type energy storage and current conversion integrated machine in an embodiment of the present invention;

[0039] Figure 2 It is a schematic diagram from a first angle of a liquid-cooled string-type energy storage and current conversion integrated machine in an embodiment of the present invention;

[0040] Figure 3 A second angle schematic diagram of a liquid-cooled string-type energy storage and converter in an embodiment of the present invention;

[0041] Figure 4 It is a third angle schematic diagram of the liquid-cooled string energy storage and converter in an embodiment of the present invention.

[0042] Numbers in the figure:

[0043] 1. Support frame; 101. Module frame; 11. Universal wheel; 2. Converter; 3. AC switch module; 4. DC switch module; 5. Busbar; 51. Wiring connection; 6. Liquid cooling circulation pipeline; 61. Primary pipeline; 62. Secondary pipeline; 63. Tertiary pipeline; 71. High-voltage wiring harness; 72. Low-voltage wiring harness. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0048] As described in the background technology of this application, the energy storage converter and booster integrated machine is an important component of the energy storage power station, which is usually divided into a transformer part and a converter part according to the equipment composition. Among them, the converter part (integrated machine) is usually composed of an energy storage converter, a DC switch module, an AC switch module, high and low voltage connection devices, and a supporting structure. According to the power size of the converter, it can be divided into centralized and string types.

[0049] The inventors of the present application have discovered that the current mainstream string-type integrated converters usually use air cooling to dissipate heat and cool the converter. The air flow is sucked in from the bottom of the converter and then discharged from the top or side. This air-cooled string-type integrated converter usually has defects such as complex structural design, low integration, low assembly efficiency, and difficult operation and maintenance.

[0050] In order to solve the above problems, the inventor of the present application proposed the technical solution of the present application, and the specific embodiments are as follows:

[0051] Figure 1 is a schematic front view of a liquid-cooled string energy storage and converter in an embodiment of the present invention, Figure 2 is a first angle schematic diagram of a liquid-cooled string energy storage and converter in an embodiment of the present invention, Figure 3 is a second angle schematic diagram of a liquid-cooled string energy storage and converter in an embodiment of the present invention, Figure 4 It is a third angle schematic diagram of the liquid-cooled string energy storage and converter in an embodiment of the present invention.

[0052] like Figures 1 to 4 As shown, the liquid-cooled string energy storage and converter in one device of this embodiment comprises: a support frame 1, a converter 2, an AC switch module 3, a DC switch module 4, a busbar 5 and a liquid cooling circulation pipeline 6.

[0053] The support frame 1 is in a rectangular frame shape. The support frame 1 is formed by connecting a plurality of module frames 101 (at least two). The plurality of module frames 101 are sequentially spliced ​​along the length direction to form the rectangular frame-shaped support frame 1 .

[0054] Each module frame 101 of the support frame 1 includes: an inverter area, an AC switch area, a DC switch area and a busbar area. The inverter area, the AC switch area and the busbar area are arranged side by side at the upper position of the module frame 101, and the DC switch area is located at the bottom position of the module frame 101.

[0055] There are multiple converters 2 , AC switch modules 3 and DC switch modules 4 , and the numbers of converters 2 , AC switch modules 3 and DC switch modules 4 correspond to each other. The number of busbars 5 corresponds to the number of module frames 101 .

[0056] A plurality of converters 2 are arranged in the converter area of ​​the module frame 101, and the plurality of converters 2 are arranged in the converter area in an up-and-down stacking state. A plurality of AC switch modules 3 are arranged in the AC switch area of ​​the module frame 101, and the plurality of AC switch modules 3 are also arranged up-and-down. The busbar 5 is arranged vertically in the busbar area of ​​the module frame 101. A plurality of DC switch modules 4 are arranged in the DC switch area of ​​the module frame 101, and the plurality of DC switch modules 4 are arranged horizontally in the DC switch area.

[0057] The converter 2 is provided with a cooling channel.

[0058] The liquid cooling circulation pipeline 6 is arranged on the support frame 1, one end of the liquid cooling circulation pipeline 6 is connected and communicated with the cooling channels of all converters 2, and the other end of the liquid cooling circulation pipeline 6 is connected and communicated with an external cooling medium supply mechanism, and the converter 2 is cooled by the external cooling medium (heat exchange medium).

[0059] The DC switch module 4 is connected to the busbar 5 through a high-voltage wire harness 71, and the DC interface of the converter 2 is connected to the busbar 5 through a high-voltage wire harness 71. The high-voltage wire harness 71 (AC wire harness) connected from the AC interface of the converter 2 is connected to the upper interface of the AC switch module 3, and the high-voltage wire harness 71 is then connected to the busbar 5 from the lower interface of the AC switch module 3.

[0060] The low-voltage wire harness 72 connected from the multiple converters 2 is connected from the side of the support frame 1 after being merged, and is used to be connected to the transformer.

[0061] The busbar 5 is provided with a connection interface 51 for connecting to a transformer.

[0062] In the liquid-cooled string energy storage and converter integrated machine of this embodiment, the support frame (module frame) is a frame-type bearing mechanism, which is arranged at a suitable location such as the ground and is located above the ground cable trench. The support frame (module frame) is an integrated carrier for assembling all equipment components and provides installation space (installation area) for other equipment components.

[0063] The external high-voltage harness is led out from the ground groove, connected from the bottom of the support frame (module frame), and connected to the DC switch module. Then the high-voltage harness is connected from the DC switch module to the busbar, and then connected from the busbar to the DC interface of the corresponding converter. The high-voltage AC harness connected from the AC interface of the converter is connected to the upper interface of the corresponding AC switch module, and then the high-voltage AC harness is connected from the lower interface of the AC switch module to the busbar. The wiring interface of the busbar is used to connect to the transformer.

[0064] The low-voltage wire harnesses from multiple converters are connected from the module frame after being merged for connection with the transformer.

[0065] It is not difficult to find from the above content that the liquid-cooled string energy storage and converter in this embodiment is connected by a support frame, a converter, an AC switch module, a DC switch module, a busbar and a liquid cooling circulation pipeline. The support frame is formed by connecting multiple module frames, and the module frame is provided with a converter area, an AC switch area, a DC switch area and a busbar area. Multiple converters and AC switch modules are respectively arranged in the converter area and the AC switch area, and the busbar is arranged in the busbar area. Multiple DC switch modules are arranged horizontally in the DC switch area. The converter is provided with a cooling channel, and the liquid cooling circulation pipeline is arranged on the support frame and connected to the cooling channel of the converter. The DC switch module and the DC interface of the converter are respectively connected to the busbar through a high-voltage wire harness, and the high-voltage wire harness connected from the AC interface of the converter is connected to the upper interface of the AC switch module. The high-voltage wire harness is then connected to the busbar from the lower interface of the AC switch module. The low-voltage wire harness connected from the converter is connected after merging, and the busbar is provided with a wiring interface connected to the transformer. The liquid-cooled string energy storage converter in this embodiment is arranged above the cable trench. The external high-voltage wire harness is connected from the bottom of the converter, connected to the DC switch module, and then connected to the DC interface of each converter through the busbar. The AC wire harness connected from the AC interface of the converter is connected to the upper interface of the AC switch module. The high-voltage wire harness is connected to the busbar from the lower interface of the AC switch module, and the bottom of the busbar is left with a wiring interface for connecting the transformer; the low-voltage wire harness is connected from the converter and then converged, and then connected from the support frame. The converter is cooled by liquid cooling, and its cooling effect and temperature control effect are better, so that the power expansion space of the converter is higher and it is not easy to fail; the overall modular design is adopted, each module can be maintained independently, and the integration is higher; the electrical connection of the busbar is adopted, which has more cost advantages.

[0066] Optionally, in the liquid-cooled string energy storage and conversion integrated machine in this embodiment, the busbar area and the AC switch area of ​​each module frame 101 of the support frame 1 are respectively arranged on the left and right sides of the converter area, so that the busbar 5 and the AC switch module 3 are respectively arranged on the left and right sides of the converter 2, and the DC switch module 4 is located below the bottom of the converter 2, so that the structure of the energy storage and conversion integrated machine is more compact and convenient for the electrical connection between the converter and the busbar and the AC switch.

[0067] The busbar area, the converter area, and the AC switch area of ​​the plurality of module frames 101 are arranged in sequence from left to right.

[0068] Furthermore, in the liquid-cooled string energy storage and converter in this embodiment, in the converter area of ​​each module frame 101 of the support frame 1, multiple converters 2 are arranged vertically on the support frame 1, and two adjacent converters 2 are arranged at intervals, leaving gaps between adjacent converters 2 to allow cold air to enter, which is more conducive to heat dissipation and cooling of the converter 2.

[0069] Correspondingly, a plurality of AC switch modules 3 are arranged vertically in the AC switch region of the module frame 101 , and a gap is left between two adjacent AC switch modules 3 .

[0070] A plurality of DC switch modules 4 are arranged transversely in the DC switch region of the module frame 101 , and a gap is also left between two adjacent DC switch modules 4 .

[0071] Furthermore, in the liquid-cooled string energy storage and converter in this embodiment, the liquid cooling circulation pipeline 6 includes: a primary pipeline 61 , a secondary pipeline 62 and a tertiary pipeline 63 .

[0072] The primary pipeline 61 is horizontally arranged at the top of the support frame 1 , and the primary pipeline 61 is connected to an external cooling medium supply mechanism.

[0073] The number of the secondary pipelines 62 corresponds to the number of the module frames 101 . The secondary pipelines 62 are vertically arranged, and a plurality of secondary pipelines 62 are respectively arranged on the side walls of a plurality of module frames 101 . The top ends of the secondary pipelines 62 are connected and communicated with the primary pipelines 61 .

[0074] The number of the tertiary pipelines 63 corresponds to the number of the converters 2 .

[0075] The tertiary pipeline 63 is horizontally arranged on the support frame 1 (module frame), one end of the tertiary pipeline 63 is connected and communicated with the secondary pipeline 62, and the other end of the tertiary pipeline 63 is connected and communicated with the cooling channel of the converter 2.

[0076] In this embodiment, the cooling liquid (heat exchange medium) of the cooling medium supply mechanism is delivered and distributed to each converter through the liquid cooling circulation pipeline to cool the converter.

[0077] Optionally, in the liquid-cooled string energy storage and conversion integrated machine in this embodiment, the wiring interface 51 of the busbar 5 is located at the bottom end of the busbar 5 .

[0078] Furthermore, in the liquid-cooled string energy storage and converter in this embodiment, the high-voltage wire harness 71 connected to the DC interface of the converter 2 and the high-voltage wire harness 71 connected to the AC interface of the converter 2 are connected from the front of the converter 2 and then connected to the busbar 5 and the AC switch module 3 respectively.

[0079] The low-voltage wiring harness 72 connected to the converter 2 is connected from the back of the converter 2 and extends upward along the side wall of the support frame 1 (module frame). The low-voltage wiring harness 72 connected from multiple converters 2 is connected from the top of the support frame 1 after converging.

[0080] In this embodiment, the high-voltage wire harness and the low-voltage wire harness are arranged along different paths on the support frame, so that the high-voltage wire harness and the low-voltage wire harness are separated on the support frame, thereby improving electrical safety and reducing mutual shielding interference.

[0081] Optionally, in the liquid-cooled string energy storage and converter in this embodiment, the high-voltage harness 71 and the low-voltage harness 72 are connecting bars. The high-voltage harness 71 and the low-voltage harness 72 use a busbar structure of connecting bars to achieve electrical connection between the components of the integrated machine, which is more cost-effective.

[0082] Optionally, the liquid-cooled string energy storage and converter in this embodiment is provided with universal wheels 11 at the four top corners of the bottom of the support frame 1 to facilitate the push-pull movement of the support frame 1.

[0083] Optionally, in the liquid-cooled string energy storage and converter in this embodiment, a lifting lug (not shown) is provided on the top of the support frame 1 to facilitate lifting and carrying of the support frame 1 .

[0084] In the present invention, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate medium.

[0085] Moreover, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0086] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid-cooled string energy storage and converter integrated machine, characterized in that: include: Support frame, converter, AC switch module, DC switch module, busbar and liquid cooling circulation pipeline; The support frame is in a rectangular frame shape and is formed by connecting a plurality of module frames in the length direction; The module frame is provided with a converter area, an AC switch area, a DC switch area and a busbar area, wherein the converter area, the AC switch area and the busbar area are arranged side by side at the upper part of the module frame, and the DC switch area is located at the bottom of the module frame; The number of the converters, the AC switch modules and the DC switch modules corresponds to each other, and the number of the busbars corresponds to that of the module frames; The multiple converters and the AC switch modules are respectively arranged in the converter area and the AC switch area in an upper and lower manner, the busbar is vertically arranged in the busbar area, and the multiple DC switch modules are horizontally arranged in the DC switch area; The converter is provided with a cooling channel; The liquid cooling circulation pipeline is arranged on the support frame, connected to the cooling channels of the plurality of converters, and the liquid cooling circulation pipeline is used to be connected to a cooling medium supply mechanism; The DC switch module and the DC interface of the converter are respectively connected to the busbar through high-voltage wire harnesses, the high-voltage wire harness connected from the AC interface of the converter is connected to the upper interface of the AC switch module, and the high-voltage wire harness is then connected to the busbar from the lower interface of the AC switch module; The low-voltage wire harnesses connected from the plurality of converters are connected after being merged and used for connection with the transformer; The busbar is provided with a wiring interface for connecting to a transformer; The DC switch module is used to connect to an external high-voltage wire harness.

2. The liquid-cooled string energy storage and converter according to claim 1, characterized in that: The busbar area and the AC switch area are respectively arranged on the left and right sides of the converter area, and the busbar areas, converter areas, and AC switch areas of the plurality of module frames are arranged in sequence from left to right; The DC switch module is arranged below the converter.

3. The liquid-cooled string energy storage and converter according to claim 2, characterized in that: Gaps are left between adjacent converters, between the AC switch modules, and between the DC switch modules.

4. The liquid-cooled string energy storage and converter according to claim 1, characterized in that: The liquid cooling circulation pipeline includes: a primary pipeline, a secondary pipeline and a tertiary pipeline; The primary pipeline is arranged at the top of the support frame and is used to be connected to the cooling medium supply mechanism; The number of the secondary pipelines corresponds to the number of the module frames, and they are arranged on the side walls of the module frames and connected to the primary pipelines; The number of the tertiary pipelines corresponds to the number of the converters. One end of the tertiary pipeline is connected to the secondary pipeline, and the other end is connected to the cooling channel of the converter.

5. The liquid-cooled string energy storage and converter according to claim 1, characterized in that: The wiring interface is located at the bottom end of the busbar.

6. The liquid-cooled string energy storage and converter according to claim 5, characterized in that: The high-voltage wiring harness is connected from the front side of the converter and then respectively connected to the busbar and the AC switch module; The low-voltage wire harness is connected from the back of the converter and is connected from the top of the module frame after converging.

7. The liquid-cooled string energy storage and converter according to claim 1, characterized in that: The high-voltage wiring harness and the low-voltage wiring harness are both connection bars.

8. The liquid-cooled string energy storage and converter according to claim 1, characterized in that: The support frame is provided with universal wheels at four top corners of the bottom.

9. The liquid-cooled string energy storage and converter according to claim 1, characterized in that: A lifting lug is arranged on the top of the supporting frame.

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