High Power Density Modular Energy Storage Inverter

Abstract

The present invention provides a high-power-density modular energy storage converter, which relates to the technical field of energy storage converters and includes: a cabinet, which is divided into a first, a second, and a third region, and includes: a base bottom plate; a front structure disposed in the first region, including a power module and a first air-water heat exchanger connected to each other; a middle structure disposed in the second region, including: a reactor module connected to the side wall of the cabinet and the power module; a DC magnetic ring module; an AC magnetic ring module connected to the reactor module; an AC filter capacitor connected to the reactor module and the AC magnetic ring module; a rear structure disposed in the third region, including: a DC contactor connected to the power module through a first copper bar, and the first copper bar penetrates through the DC magnetic ring module; an AC circuit breaker connected to the reactor module and the AC magnetic ring module; an AC pluggable connector connected to the cabinet and the AC circuit breaker; a DC fuse module connected to the DC contactor; a DC pluggable connector connected to the cabinet and the DC fuse module.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage converters, and more particularly, to a high power density modular energy storage converter. Background Art

[0002] In related technologies, the energy storage converter cools the internal components by air cooling, and the power density per unit volume is not high. With the large-scale application of container energy storage, the space provided for the energy storage converter is getting smaller and smaller, and higher requirements are put forward for the unit energy density. Therefore, the conventional air-cooled energy storage converter can no longer meet the requirements, especially in some high-end application scenarios, and there is an urgent need to develop an energy storage converter with a compact structure and high power density. Summary of the Invention

[0003] In order to solve or improve the technical problems of the non-compact structure and low power density of the energy storage converter in related technologies, the purpose of the present invention is to provide a high power density modular energy storage converter.

[0004] To achieve the above object, the present invention provides a high power density modular energy storage converter, including: a cabinet, which is divided into a first area, a second area and a third area, and the first area, the second area and the third area are arranged in sequence along a first direction. The cabinet includes: a base bottom plate, at least part of the base bottom plate is arranged in the first area, at least part of the base bottom plate is arranged in the second area, and at least part of the base bottom plate is arranged in the third area; a front structure, arranged in the first area, and the front structure includes: a power module, connected to the base bottom plate; a first air-water heat exchanger, connected to the power module; a middle structure, arranged in the second area, and the middle structure includes: a reactor module, connected to the side wall of the cabinet, and the reactor module is connected to the power module; a DC magnetic ring module, connected to the base bottom plate; an AC magnetic ring module, connected to the base bottom plate, and the AC magnetic ring module is connected to the reactor module; an AC filter capacitor, connected to the base bottom plate, and the AC filter capacitor is connected to the AC magnetic ring module and the reactor module; a rear structure, arranged in the third area, and the rear structure includes: a DC contactor, connected to the base bottom plate, and the DC contactor is connected to the power module through a first copper bar, and the first copper bar passes through the DC magnetic ring module; an AC circuit breaker, connected to the base bottom plate, and the AC circuit breaker is connected to the AC magnetic ring module; an AC pluggable joint, connected to the cabinet, and the AC pluggable joint is connected to the AC circuit breaker; a DC fuse module, connected to the DC contactor; a DC pluggable joint, connected to the cabinet, and the DC pluggable joint is connected to the DC fuse module.

[0005] According to the technical solution of the high-power density modular energy storage converter provided by the present invention, on the one hand, the cabinet is divided into a first area, a second area and a third area, and the front structure, the middle structure and the rear structure are respectively arranged in the corresponding areas. By optimizing the spatial layout, the structures and components are more compact, which is beneficial to reducing the overall volume of the energy storage converter and increasing the power density per unit volume. On the other hand, by replacing the conventional air-cooled structure with an air-water heat exchanger and using an AC circuit breaker to replace the disconnect switch and contactor in the conventional structure, the structure of the energy storage converter is more compact, which is beneficial to further reducing the overall volume of the energy storage converter and increasing the power density per unit volume.

[0006] The energy storage converter (PCS, Power Conversion System) can control the charging and discharging processes of the battery, perform AC-DC conversion, and directly supply power to AC loads in the absence of a power grid.

[0007] Specifically, the high-power density modular energy storage converter includes a cabinet, a front structure, a middle structure and a rear structure. Among them, the cabinet is divided into a first area, a second area and a third area. The first area, the second area and the third area are arranged in sequence along a first direction. The front structure is arranged in the first area of the cabinet; the middle structure is arranged in the second area of the cabinet; the rear structure is arranged in the third area of the cabinet. The second area is located between the first area and the third area, so the middle structure is located between the front structure and the rear structure. Optionally, the first direction is the length direction of the cabinet. The cabinet is arranged horizontally. The front structure, the middle structure and the rear structure are arranged in sequence along the length direction of the cabinet.

[0008] Furthermore, the cabinet includes a base floor. At least part of the base floor is arranged in the first area. At least part of the base floor is arranged in the second area. At least part of the base floor is arranged in the third area. In the base floor, at least a part is arranged in the first area of the cabinet, at least a part is arranged in the second area of the cabinet, and at least a part is arranged in the third area of the cabinet.

[0009] Further, the front structure is disposed in the first area of the cabinet. The front structure includes a power module and a first air-water heat exchanger. Specifically, the power module is connected to the base floor. Optionally, the power module is detachably connected to the base floor, facilitating the installation and disassembly of the power module by the staff. The power module is a module formed by combining power electronic devices according to certain functions. The first air-water heat exchanger is connected to the power module. The first air-water heat exchanger dissipates heat from the components (especially the power module) in the front structure in the form of heat exchange between air and water. Optionally, the front structure is the operation panel part of the high-power density modular energy storage converter and is the core component of the high-power density modular energy storage converter. The power module and the first air-water heat exchanger form an integral body through a first connecting member and are fixed on the base floor. Optionally, the first connecting member is a screw or other connecting structures. Optionally, the front structure is designed symmetrically, which can ensure the interchangeability between each product.

[0010] Further, the middle structure is disposed in the second area of the cabinet. The middle structure includes a reactor module, a DC magnetic ring module, an AC magnetic ring module, and an AC filter capacitor. Specifically, the reactor module is connected to the side wall of the cabinet. The reactor module is connected to the power module. A reactor is also called an inductor and is widely used in circuits. Due to the effect of electromagnetic induction, the reactor has a certain inductance, which can play a role in blocking current changes and can store electrical energy as magnetic energy. Further, the DC magnetic ring module is connected to the base floor. The AC magnetic ring module is connected to the base floor. The AC magnetic ring module is connected to the reactor module. Optionally, the DC magnetic ring module is connected to the base floor through its own fixing plate, and the fixing plate and the base floor are detachably connected through a second connecting member. Optionally, the second connecting member is a screw or other connecting structures. Optionally, the middle structure further includes a first support member. The first support member is connected to the side wall of the cabinet. The reactor module is connected to the first support member through a third connecting member. Optionally, the first support member is a support angle member. Optionally, the third connecting member is a bolt or other connecting structures. Optionally, the AC magnetic ring module is connected to the base floor through a second support member. Optionally, the second support member is an insulating member, such as a rubber block or other structures. Further, the AC filter capacitor is connected to the base floor. The AC filter capacitor is connected to the AC magnetic ring module and is also connected to the reactor module. The AC filter capacitor is a filtering device installed on the AC side of the inverter to filter out the high-order harmonics generated by the inverter. The AC filter capacitor and the reactor together form an LC filter. By setting the LC filter, the total harmonic content generated by the inverter can be reduced. Optionally, the AC filter capacitor is connected to the third copper bar between the AC magnetic ring module and the reactor module through a cable.

[0011] Further, the rear structure is disposed in the third area of the cabinet. The rear structure includes a DC contactor, an AC circuit breaker, an AC pluggable connector, a DC fast fuse module, and a DC pluggable connector. Specifically, the DC contactor is connected to the base floor. The DC contactor is connected to the power module through a first copper busbar. The first copper busbar passes through the DC magnetic ring module. The DC contactor is designed specifically for breaking DC current. When breaking DC current, its arc does not have a short extinction at the zero crossing of the alternating current. Therefore, a special device for extinguishing the arc is designed inside the DC contactor. The first copper busbar is connected to the power module through a fourth connecting member, and the first copper busbar is connected to the DC contactor through a fourth connecting member. Optionally, the fourth connecting member is a bolt or other connecting structure.

[0012] Further, the AC circuit breaker is connected to the base floor. The AC circuit breaker is connected to the reactor module. The AC circuit breaker is connected to the AC magnetic ring module. The AC circuit breaker protects the equipment at its outlet and quickly cuts off the fault current when a fault occurs on the outlet side. Optionally, the AC magnetic ring module has a second copper busbar. The reactor module is connected to the second copper busbar through at least one copper busbar structure. The AC circuit breaker is connected to the second copper busbar.

[0013] Further, the AC pluggable connector is connected to the cabinet. The AC pluggable connector is connected to the AC circuit breaker. Optionally, the AC pluggable connector is connected to the AC circuit breaker through a first flexible connection and forms an AC incoming line loop. The flexible connection is a copper braided wire flexible connection or a copper braided tape flexible connection. Further, the DC fast fuse module is connected to the DC contactor. The DC fast fuse module is a fast fuse. The fast fuse is used for overcurrent and short-circuit protection and can quickly disconnect in the case of fuse overload. Further, the DC pluggable connector is connected to the cabinet. The DC contactor, the fast fuse, and the DC pluggable connector form a DC incoming line loop.

[0014] In the technical solution defined by the present invention, on the one hand, the cabinet is divided into a first area, a second area, and a third area, and the front structure, the middle structure, and the rear structure are respectively arranged in the corresponding areas. By optimizing the spatial layout, the structures and components are more compact, which is beneficial to reducing the overall volume of the energy storage converter and increasing the power density per unit volume. On the other hand, by replacing the conventional air-cooled structure with an air-water heat exchanger and using an AC circuit breaker to replace the disconnect switch and contactor in the conventional structure, the structure of the energy storage converter is more compact, which is beneficial to further reducing the overall volume of the energy storage converter and increasing the power density per unit volume. The power density (weight specific power) refers to the ratio of the power output by the battery to its weight.

[0015] In addition, the above technical solution provided by the present invention may also have the following additional technical features:

[0016] In the above technical solution, the AC magnetic ring module has a second copper bar, the second copper bar is connected to the reactor module, and the second copper bar is connected to the AC circuit breaker.

[0017] In this technical solution, by setting the second copper bar, it is convenient for the staff to install and disassemble the AC magnetic ring module and the reactor module, as well as the AC magnetic ring module and the AC circuit breaker.

[0018] In the above technical solution, the reactor module is connected to the AC magnetic ring module through a third copper bar, and the AC filter capacitor is connected to the third copper bar through a cable.

[0019] In this technical solution, by setting the third copper bar, it is possible to connect the reactor module, the AC magnetic ring module, and the AC filter capacitor.

[0020] In the above technical solution, the rear structure further includes: a second air-water heat exchanger, which is connected to the side wall of the cabinet through a lightning protection mounting plate.

[0021] In this technical solution, the rear structure further includes a second air-water heat exchanger. Specifically, the second air-water heat exchanger is connected to the side wall of the cabinet through a lightning protection mounting plate. The second air-water heat exchanger dissipates heat from the components in the rear structure in the form of heat exchange between air and water.

[0022] In the above technical solution, the number of power modules is at least one.

[0023] In this technical solution, the number of power modules can be one, two, or more, and the power modules can be flexibly set according to actual needs.

[0024] In the above technical solution, it further includes: a liquid cooling pipeline system, which is connected to the power module, and the liquid cooling pipeline system is connected to the reactor.

[0025] In this technical solution, the high-power density modular energy storage converter further includes a liquid cooling pipeline system. Specifically, the liquid cooling pipeline system is connected to the power module. The liquid cooling pipeline system is connected to the reactor. The liquid cooling pipeline system connects the power module and the reactor module to conduct liquid cooling on them. The liquid cooling pipeline system, together with the first air-water heat exchanger, the second air-water heat exchanger, and the air duct partition responsible for internal circulation, forms an internal air cooling circulation loop to maintain the air operating environment temperature inside the energy storage converter. Each component is in a suitable environmental condition to ensure that its power does not degrade due to temperature changes. By optimizing the internal air duct, the air circulation is smoother, effectively reducing the internal environmental temperature of the energy storage converter so that the components can work efficiently.

[0026] In the above technical solution, the reactor module is connected to the side wall of the cabinet through a first support member.

[0027] In this technical solution, the middle structure further includes a first support member. The first support member is connected to the side wall of the cabinet. The reactor module is connected to the first support member through a third connecting member. Optionally, the first support member is a support angle member. Optionally, the third connecting member is a bolt or other connecting structure.

[0028] In the above technical solution, the AC magnetic ring module is connected to the base floor through a second support member.

[0029] In this technical solution, the middle structure further includes a second support member. The second support member is connected to the base floor. The AC magnetic ring module is connected to the second support member. By providing the second support member, it is beneficial to improve the connection strength between the AC magnetic ring module and the base floor.

[0030] In the above technical solution, the DC fuse module and the DC contactor are connected through a fourth copper bar.

[0031] In this technical solution, by providing the fourth copper bar, the connection between the DC fuse module and the DC contactor can be achieved. In the above technical solution, the AC pluggable connector and the AC circuit breaker are connected by a first flexible connection.

[0032] In this technical solution, by providing the first flexible connection, it is possible to avoid interference between the copper braid or copper braided wire and other components, and ensure that the AC pluggable connector and the AC circuit breaker are in a connected state.

[0033] The additional aspects and advantages of the technical solution of the present invention will become apparent in the following description section, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Shows a first schematic diagram of a high-power density modular energy storage converter according to an embodiment of the present invention;

[0035] Figure 2 Shows a second schematic diagram of a high-power density modular energy storage converter according to an embodiment of the present invention;

[0036] Figure 3 Shows a third schematic diagram of a high-power density modular energy storage converter according to an embodiment of the present invention;

[0037] Figure 4 Shows a fourth schematic diagram of a high-power density modular energy storage converter according to an embodiment of the present invention;

[0038] Figure 5 Shows a fifth schematic diagram of a high-power density modular energy storage converter according to an embodiment of the present invention;

[0039] Figure 6Shows the sixth schematic diagram of a high-power density modular energy storage converter according to an embodiment of the present invention.

[0040] Among them, Figures 1 to 6 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0041] 100: High-power density modular energy storage converter; 110: Cabinet; 111: First area; 112: Second area; 113: Third area; 114: Base floor; 120: Front structure; 121: Power module; 122: First air-water heat exchanger; 130: Middle structure; 131: Reactor module; 132: DC magnetic ring module; 133: AC magnetic ring module; 134: Second copper busbar; 135: AC filter capacitor; 140: Rear structure; 141: DC contactor; 142: AC circuit breaker; 143: Second air-water heat exchanger; 144: AC pluggable joint; 145: DC pluggable joint; 146: DC fast fuse module; 147: Lightning protection mounting plate; 151: First copper busbar; 152: First flexible connection; 153: Third copper busbar; 154: Fourth copper busbar; 160: Liquid cooling pipeline system. Detailed implementation manners

[0042] In order to more clearly understand the above objects, features and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0043] In the following description, many specific details are set forth in order to fully understand the present application. However, the embodiments of the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited to the limitations of the specific embodiments disclosed below.

[0044] Next, refer to Figures 1 to 6 Describe the high-power density modular energy storage converter 100 provided according to some embodiments of the present invention.

[0045] The energy storage converter (PCS, Power Conversion System) can control the charging and discharging processes of the battery, perform AC-DC conversion, and directly supply power to AC loads in the absence of a power grid.

[0046] In one embodiment of the present invention, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the high-power density modular energy storage converter 100 includes a cabinet 110, a front structure 120, a middle structure 130, and a rear structure 140. As Figure 1 shown, the cabinet 110 is divided into a first area 111, a second area 112, and a third area 113. The first area 111, the second area 112, and the third area 113 are arranged in sequence along a first direction. The front structure 120 is disposed in the first area 111 of the cabinet 110; the middle structure 130 is disposed in the second area 112 of the cabinet 110; the rear structure 140 is disposed in the third area 113 of the cabinet 110. The second area 112 is located between the first area 111 and the third area 113. Therefore, the middle structure 130 is located between the front structure 120 and the rear structure 140. Optionally, the first direction is the length direction of the cabinet 110. The cabinet 110 is arranged horizontally. The front structure 120, the middle structure 130, and the rear structure 140 are arranged in sequence along the length direction of the cabinet 110.

[0047] Furthermore, the cabinet 110 includes a base bottom plate 114. At least part of the base bottom plate 114 is disposed in the first area 111. At least part of the base bottom plate 114 is disposed in the second area 112. At least part of the base bottom plate 114 is disposed in the third area 113. In the base bottom plate 114, at least a part is disposed in the first area 111 of the cabinet 110, at least a part is disposed in the second area 112 of the cabinet 110, and at least a part is disposed in the third area 113 of the cabinet 110.

[0048] Furthermore, the front structure 120 is disposed in the first area 111 of the cabinet 110. As Figure 3 and Figure 6 shown, the front structure 120 includes a power module 121 and a first air-water heat exchanger 122. Specifically, the power module 121 is connected to the base bottom plate 114. Optionally, the power module 121 is detachably connected to the base bottom plate 114, which is convenient for the staff to install and disassemble the power module 121. The power module is a module formed by combining power electronic devices according to a certain function. The first air-water heat exchanger 122 is connected to the power module 121. The first air-water heat exchanger 122 dissipates heat from the components (especially the power module 121) in the front structure 120 in the form of heat exchange between air and water. Optionally, the front structure 120 is the operation panel part of the high-power density modular energy storage converter 100 and is the core component of the high-power density modular energy storage converter 100. The power module 121 and the first air-water heat exchanger 122 form a whole through a first connecting member and are fixed on the base bottom plate 114. Optionally, the first connecting member is a screw or other connecting structures. Optionally, the front structure 120 is designed symmetrically, which can ensure the interchangeability between each product.

[0049] Further, the middle structure 130 is disposed in the second area 112 of the cabinet 110. As Figure 3 , Figure 4 and Figure 6 shown, the middle structure 130 includes a reactor module 131, a DC magnetic ring module 132, an AC magnetic ring module 133, and an AC filter capacitor 135. Specifically, the reactor module 131 is connected to the side wall of the cabinet 110. The reactor module 131 is connected to the power module 121. A reactor is also called an inductor and is widely used in circuits. Due to the effect of electromagnetic induction, the reactor has a certain inductance, which can play a role in preventing current changes and can store electrical energy as magnetic energy. Further, the DC magnetic ring module 132 is connected to the base plate 114. The AC magnetic ring module 133 is connected to the base plate 114. The AC magnetic ring module 133 is connected to the reactor module 131. Optionally, the DC magnetic ring module 132 is connected to the base plate 114 through its own fixing plate, and the fixing plate and the base plate 114 are detachably connected by a second connecting member. Optionally, the second connecting member is a screw or other connecting structure. Optionally, the middle structure 130 further includes a first support member. The first support member is connected to the side wall of the cabinet 110. The reactor module 131 is connected to the first support member through a third connecting member. Optionally, the first support member is a support angle member. Optionally, the third connecting member is a bolt or other connecting structure. Optionally, the AC magnetic ring module 133 is connected to the base plate 114 through a second support member. Optionally, the second support member is an insulating member, such as a rubber block or the like. Further, the AC filter capacitor 135 is connected to the base plate 114. The AC filter capacitor 135 is connected to the AC magnetic ring module 133 and is connected to the reactor module 131. The AC filter capacitor 135 is a filtering device installed on the AC side of the inverter for filtering out high-order harmonics generated by the inverter. The AC filter capacitor 135 and the reactor module 131 together form an LC filter. By setting the LC filter, the total harmonic content generated by the inverter can be reduced. Optionally, the AC filter capacitor 135 is connected to the third copper bar 153 between the AC magnetic ring module 133 and the reactor module 131 through a cable.

[0050] Further, the rear structure 140 is disposed in the third area 113 of the cabinet 110. As Figure 3 and Figure 5As shown, the rear structure 140 includes a DC contactor 141, an AC circuit breaker 142, an AC pluggable connector 144, a DC fast fuse module 146, and a DC pluggable connector 145. Specifically, the DC contactor 141 is connected to the base floor 114. The DC contactor 141 is connected to the power module 121 through a first copper busbar 151. The first copper busbar 151 passes through the DC magnetic ring module 132. The DC contactor 141 is designed specifically for interrupting DC current. When interrupting DC current, its arc does not have the brief extinction at the zero-crossing of alternating current. Therefore, a special device for extinguishing the arc is designed inside the DC contactor. The first copper busbar 151 is connected to the power module 121 through a fourth connector, and the first copper busbar 151 is connected to the DC contactor 141 through a fourth connector. Optionally, the fourth connector is a bolt or other connecting structure.

[0051] Further, the AC circuit breaker 142 is connected to the base floor 114. The AC circuit breaker 142 is connected to the reactor module 131. The AC circuit breaker 142 is connected to the AC magnetic ring module 133. The AC circuit breaker 142 is used to protect the equipment at its outlet and quickly cut off the fault current when a fault occurs on the outlet side. Optionally, the AC magnetic ring module 133 has a second copper busbar 134. The reactor module 131 is connected to the second copper busbar 134 through at least one copper busbar structure. The AC circuit breaker 142 is connected to the second copper busbar 134.

[0052] Further, the AC pluggable connector 144 is connected to the cabinet 110. The AC pluggable connector 144 is connected to the AC circuit breaker 142. Optionally, the AC pluggable connector 144 is connected to the AC circuit breaker 142 through a first flexible connection 152 and forms an AC incoming line circuit. The flexible connection is a copper braided wire flexible connection or a copper braided tape flexible connection. Further, the DC fast fuse module 146 is connected to the DC contactor 141. The DC fast fuse module 146 is a fast fuse. The fast fuse is used for overcurrent and short-circuit protection and can quickly disconnect in the case of fuse overload. Further, the DC pluggable connector 145 is connected to the cabinet 110. The DC contactor 141, the fast fuse (DC fast fuse module 146), and the DC pluggable connector 145 form a DC incoming line circuit.

[0053] In the technical solution defined by the present invention, on the one hand, the cabinet 110 is divided into a first area 111, a second area 112 and a third area 113, and the front structure 120, the middle structure 130 and the rear structure 140 are respectively arranged in the corresponding areas. By optimizing the space layout, the structures and components are more compact, which is beneficial to reducing the overall volume of the energy storage converter and increasing the power density per unit volume. On the other hand, by replacing the conventional air-cooled structure with an air-water heat exchanger and using an AC circuit breaker 142 to replace the disconnect switch and contactor in the conventional structure, the structure of the energy storage converter is more compact, which is beneficial to further reducing the overall volume of the energy storage converter and increasing the power density per unit volume. The power density (weight-specific power) refers to the ratio of the power output by the battery to its weight.

[0054] In an embodiment according to the present invention, as Figure 4 shown, the AC magnetic ring module 133 has a second copper bar 134. The second copper bar 134 is connected to the reactor module 131, and the second copper bar 134 is connected to the AC circuit breaker 142. By providing the second copper bar 134, it is convenient for the staff to install and disassemble the AC magnetic ring module 133 and the reactor module 131, and the AC magnetic ring module 133 and the AC circuit breaker 142.

[0055] In an embodiment according to the present invention, as Figure 4 shown, the reactor module 131 is connected to the AC magnetic ring module 133 through a third copper bar 153, and the AC filter capacitor 135 is connected to the third copper bar 153 through a cable. By providing the third copper bar 153, it is possible to connect the reactor module 131, the AC magnetic ring module 133 and the AC filter capacitor 135.

[0056] In an embodiment according to the present invention, as Figure 3 shown, the rear structure 140 further includes a second air-water heat exchanger 143. Specifically, the second air-water heat exchanger 143 is connected to the side wall of the cabinet 110 through a lightning protection mounting plate 147. The second air-water heat exchanger 143 dissipates heat from the components in the rear structure 140 in the form of heat exchange between air and water.

[0057] In an embodiment according to the present invention, as Figure 3As shown in the figure, the high-power density modular energy storage converter 100 further includes a liquid cooling pipeline system 160. Specifically, the liquid cooling pipeline system 160 is connected to the power module 121. The liquid cooling pipeline system 160 is connected to the reactor. The liquid cooling pipeline system 160 communicates with the power module 121 and the reactor module 131 to perform liquid cooling on them. The liquid cooling pipeline system 160, the first air-water heat exchanger 122 responsible for internal circulation, the second air-water heat exchanger 143, and the air duct partition form an internal air cooling circulation loop to maintain the air operating environment temperature inside the energy storage converter. Each component is in a suitable environmental condition to ensure that its power does not degrade due to temperature changes. By optimizing the internal air duct, the air circulation is smoother, effectively reducing the internal environmental temperature of the energy storage converter so that the components can work efficiently.

[0058] In an embodiment according to the present invention, the middle structure 130 further includes a first support member. The first support member is connected to the side wall of the cabinet 110. The reactor module 131 is connected to the first support member through a third connecting member. Optionally, the first support member is a support angle member. Optionally, the third connecting member is a bolt or other connecting structure.

[0059] In an embodiment according to the present invention, the middle structure 130 further includes a second support member. The second support member is connected to the base bottom plate 114. The AC magnetic ring module 133 is connected to the second support member. By providing the second support member, it is beneficial to improve the connection strength between the AC magnetic ring module 133 and the base bottom plate 114.

[0060] Optionally, the second support member is an insulating member.

[0061] In an embodiment according to the present invention, as Figure 3 shown, the DC fast fuse module 146 and the DC contactor 141 are connected through a fourth copper busbar 154. By providing the fourth copper busbar 154, the connection between the DC fast fuse module 146 and the DC contactor 141 can be achieved.

[0062] In an embodiment according to the present invention, the AC pluggable connector 144 and the AC circuit breaker 142 are connected by a first flexible connection 152. By providing the first flexible connection 152, it is possible to prevent the copper braid or copper braided wire from interfering with other components and ensure that the AC pluggable connector 144 and the AC circuit breaker 142 are in a connected state.

[0063] In an embodiment of the high-power density modular energy storage converter according to the present invention, on the one hand, the cabinet is divided into a first area, a second area and a third area, and the front structure, the middle structure and the rear structure are respectively arranged in the corresponding areas. By optimizing the spatial layout, the structures and components are more compact, which is beneficial to reducing the overall volume of the energy storage converter and increasing the power density per unit volume. On the other hand, by replacing the conventional air-cooled structure with an air-water heat exchanger and using an AC circuit breaker to replace the disconnect switch and contactor in the conventional structure, the structure of the energy storage converter is more compact, which is beneficial to further reducing the overall volume of the energy storage converter and increasing the power density per unit volume.

[0064] In the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0066] In the description of this specification, the descriptions of the terms "an embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection 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 instance. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-power-density modular energy storage converter, characterized in that, Comprising: A cabinet (110), which is divided into a first area (111), a second area (112) and a third area (113). The first area (111), the second area (112) and the third area (113) are arranged in sequence along a first direction. The cabinet (110) includes: A base bottom plate (114), at least part of the base bottom plate (114) is disposed in the first area (111), at least part of the base bottom plate (114) is disposed in the second area (112), and at least part of the base bottom plate (114) is disposed in the third area (113); A front structure (120), disposed in the first area (111), the front structure (120) includes: A power module (121), connected to the base bottom plate (114); A first air-water heat exchanger (122), connected to the power module (121); A middle structure (130), disposed in the second area (112), the middle structure (130) includes: A reactor module (131), connected to the side wall of the cabinet (110), the reactor module (131) is connected to the power module (121); A DC magnetic ring module (132), connected to the base bottom plate (114); An AC magnetic ring module (133), connected to the base bottom plate (114), the AC magnetic ring module (133) is connected to the reactor module (131); An AC filter capacitor (135), connected to the base bottom plate (114), the AC filter capacitor (135) is connected to the AC magnetic ring module (133), and the AC filter capacitor (135) is connected to the reactor module (131); A rear structure (140), disposed in the third area (113), the rear structure (140) includes: A DC contactor (141), connected to the base bottom plate (114), the DC contactor (141) is connected to the power module (121) through a first copper bar (151), and the first copper bar (151) passes through the DC magnetic ring module (132); An AC circuit breaker (142), connected to the base bottom plate (114), the AC circuit breaker (142) is connected to the AC magnetic ring module (133); An AC pluggable connector (144), connected to the cabinet (110), the AC pluggable connector (144) is connected to the AC circuit breaker (142); A DC fast fuse module (146), connected to the DC contactor (141); A DC pluggable connector (145), connected to the cabinet (110), the DC pluggable connector (145) is connected to the DC fast fuse module (146).

2. The high-power density modular energy storage converter according to claim 1, characterized in that, The AC magnetic ring module (133) has a second copper bar (134), the second copper bar (134) is connected to the reactor module (131), and the second copper bar (134) is connected to the AC circuit breaker (142).

3. The high-power density modular energy storage converter according to claim 1, wherein The reactor module (131) is connected to the AC magnetic ring module (133) through a third copper bar (153), and the AC filter capacitor (135) is connected to the third copper bar (153) through a cable.

4. The high-power density modular energy storage converter according to claim 1, characterized in that The rear structure (140) further includes: A second air-water heat exchanger (143), which is connected to the side wall of the cabinet (110) through a lightning protection mounting plate (147).

5. The high-power density modular energy storage converter according to any one of claims 1 to 4, characterized in that The number of the power modules (121) is at least one.

6. The high-power density modular energy storage converter according to any one of claims 1 to 4, characterized in that, It further includes: A liquid cooling pipeline system (160), which is connected to the power module (121), and the liquid cooling pipeline system (160) is connected to the reactor module (131).

7. The high-power density modular energy storage converter according to any one of claims 1 to 4, characterized in that, The reactor module (131) is connected to the side wall of the cabinet (110) through a first support.

8. The high-power density modular energy storage converter according to any one of claims 1 to 4, characterized in that The AC magnetic ring module (133) is connected to the base floor (114) through a second support.

9. The high-power density modular energy storage converter according to any one of claims 1 to 4, characterized in that The DC fuse module (146) is connected to the DC contactor (141) through a fourth copper bar (154).

10. The high-power density modular energy storage converter according to any one of claims 1 to 4, characterized in that The AC pluggable connector (144) is connected to the AC circuit breaker (142) through a first flexible connection (152).

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