Fusion type PCS energy storage converter

Abstract

The utility model discloses a fusion type PCS energy storage converter, and relates to the technical field of electrochemical energy storage, the fusion type PCS energy storage converter comprises a box body, a PCS power unit and a high-voltage box, the box body comprises a bottom plate and a cover plate, and the bottom plate and the cover plate can be mutually encircled to form a cavity structure with an accommodating space; the PCS power unit is arranged in the cavity structure; a cavity structure is arranged in the box body, a battery cluster management unit is arranged in the high-voltage box, the high-voltage box is detachably arranged in the cavity structure and connected to the PCS power unit through an internal wiring terminal and a copper bar which are located in the cavity structure, and the PCS power unit and the high-voltage box are arranged in the cavity structure of the box body in a centralized mode. The integration degree of each component is high, the structure is compact, and the production and manufacturing cost is reduced; through the internal wiring terminals and the copper bars in the cavity structure, conductor exposure is reduced, and the electrical safety performance is improved. The high-voltage box is detachable relative to the cavity structure and can be simply and quickly disassembled and assembled, and later maintenance is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical energy storage, in particular to a fusion type PCS energy storage current conversion device. Background Art

[0002] The energy storage converter PCS (Power Conversion System), also known as the bidirectional energy storage inverter, is the core component that realizes the bidirectional flow of electric energy between the energy storage system and the power grid. It is used to control the charging and discharging process of the battery and perform AC / DC conversion.

[0003] In recent years, with the continuous expansion of the energy storage market, the demand for energy storage converters has increased. Energy storage converters are no longer simple conversion devices, but require higher integration capabilities. Energy storage converters will increasingly tend to be integrated devices. Through the development, upgrading and optimization of hardware and software, intelligent control and safety performance assurance of energy storage systems can be achieved, thereby achieving better application of energy storage technology in power grids.

[0004] In conventional energy storage system solutions, the battery cluster management unit BCMS (Battery Cluster Management System) is installed in the high-voltage box. The energy storage inverter and the high-voltage box (including the BCMS battery cluster management unit) are two independent devices. When used, the two are installed together through external copper bars or cables. The installation process is inconvenient, and the front connection must also consider the routing and electrical protection, which leads to low integration of components, large equipment size, troublesome installation, high failure rate and other problems. It is not convenient for later maintenance and the cost is high.

[0005] Therefore, how to provide a PCS energy storage and conversion device to at least partially solve the above problems is a technical problem that those skilled in the art currently need to solve. Utility Model Content

[0006] The utility model aims to provide a fusion type PCS energy storage conversion device, which can at least partially solve the problems of low integration of components in the PCS energy storage conversion device, large equipment volume, troublesome installation, high failure rate, etc.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A fusion PCS energy storage and current conversion device, comprising:

[0009] The box body comprises a bottom plate and a cover plate, and the bottom plate and the cover plate can embrace each other to form a cavity structure with a containing space;

[0010] The PCS power unit is arranged inside the cavity structure;

[0011] The high-voltage box has a battery cluster management unit inside. The high-voltage box is detachably arranged in the cavity structure and is connected to the PCS power unit through internal wiring terminals and copper bars located in the cavity structure.

[0012] Preferably, the bottom plate includes a panel arranged on one side of the box body, and the high-voltage box can be moved into the cavity structure in a direction perpendicular to the panel so that the end surface of the high-voltage box is flush with the panel;

[0013] The panel is equipped with AC terminals, quick-connect plugs, fiber optic communication interfaces and secondary wiring ports for connecting external components;

[0014] The end face is equipped with a power-off switch, DC terminals, DC isolating switch, and BMU wiring port. The power-off switch can disconnect the secondary circuit of the high-voltage box.

[0015] Preferably, the PCS power unit comprises:

[0016] A capacitor bank includes a film capacitor and a laminated busbar located on top of the film capacitor, wherein a balancing resistor is connected to the laminated busbar via a wire so that the balancing resistor is connected in parallel with the film capacitor;

[0017] IGBT module, connected to the AC terminal through the AC copper busbar, the IGBT module can output DC power to the connected laminated busbar, and the IGBT module is located between the laminated busbar and the panel;

[0018] The filter inductor is arranged at intervals on the side of the high-voltage box away from the end surface, and a main contactor, a power module and a Hall current sensor are arranged between the filter inductor and the capacitor group;

[0019] The pre-charging circuit includes a pre-charging contactor and a pre-charging resistor connected to both ends of the main contactor through wires.

[0020] Preferably, a removable front cover is provided between the panel and the end face, the front cover is provided with ventilation holes, a cooling fan is provided on one side of the cavity structure of the front cover, the cover plate is provided with a first side plate parallel to the panel, and the first side plate is provided with shutters so that the air driven by the cooling fan can flow along the ventilation holes and the shutters; both the panel and the end face are provided with handles.

[0021] Preferably, a liquid cooling plate is further provided in the cavity structure, and the liquid cooling plate is located at the bottom of the IGBT module to cool and dissipate heat from the PCS power unit. A control board powered by the power module is provided between the liquid cooling plate and the cooling fan.

[0022] Preferably, the bottom plate further includes two second side plates which are parallel to each other and perpendicular to the panel, and the second side plates are each provided with a lifting hole for transporting the box.

[0023] Preferably, a fixing plate is provided at the end of the second side plate facing away from the first side plate, and the fixing plate is a bent structure, which includes a first bent plate fittedly connected to the second side plate and a second bent plate perpendicular to the first bent plate and used for installing and fixing the fusion PCS energy storage converter device.

[0024] Preferably, the cover plate includes an extension portion extending outward from the panel, and the end of the extension portion facing away from the first side plate is provided with a through hole for fixing the external wire body, and a rear limit block is provided at the bottom of the first side plate for limiting the movement of the installed fusion PCS energy storage converter.

[0025] Preferably, the capacitor group further comprises a sheet metal module, the sheet metal module is provided with a handle capable of driving the capacitor group to move, and the capacitor group is detachably arranged in the cavity structure by bolts.

[0026] Preferably, the bottom plate and the cover plate are connected by means of slots and bolts, and the bottom plate and the cover plate are relatively detachable.

[0027] Compared with the above-mentioned background technology, the integrated PCS energy storage and conversion device provided by the utility model includes a box body, a PCS power unit and a high-voltage box. The box body includes a bottom plate and a cover plate. The bottom plate and the cover plate can embrace each other to form a cavity structure with an accommodating space; the PCS power unit is arranged inside the cavity structure; a battery cluster management unit is provided inside the high-voltage box, and the high-voltage box is detachably arranged in the cavity structure, and is connected to the PCS power unit through internal wiring terminals and copper busbars located in the cavity structure.

[0028] Specifically, by centrally arranging the PCS power unit and the high-voltage box with the battery cluster management unit inside in the cavity structure of the box, the integration of each component is high, while improving the space utilization of the box for installing the PCS power unit, and the compact structure while reducing the production cost; the high-voltage box is connected to the PCS power unit through the internal wiring terminals and copper busbars in the cavity structure, and the original external wiring is converted into internal wiring, making the box more tidy and beautiful while also reducing the exposure of conductors and improving electrical safety performance; the high-voltage box is detachable relative to the cavity structure, and can be easily and quickly disassembled and assembled, which is convenient for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] FIG1 is a schematic diagram of the structure of a fusion type PCS energy storage and conversion device provided in an embodiment of the utility model;

[0031] Fig. 2 is a front view of Fig. 1;

[0032] FIG3 is a schematic structural diagram of the integrated PCS energy storage converter provided by an embodiment of the utility model from another perspective;

[0033] FIG4 is a schematic structural diagram of the installation of a high-voltage box provided in an embodiment of the utility model;

[0034] FIG5 is a schematic diagram of the structure of the capacitor bank installation provided by an embodiment of the utility model;

[0035] FIG6 is a schematic diagram of the internal structure of the integrated PCS energy storage converter provided by an embodiment of the present utility model;

[0036] FIG. 7 is a schematic structural diagram of the internal structure of the integrated PCS energy storage converter provided in an embodiment of the present utility model from another perspective.

[0037] in:

[0038] 110-bottom plate, 111-panel, 1111-AC terminal, 1112-quick-connect plug, 1113-optical fiber communication interface, 1114-secondary wiring port, 112-lifting hole, 113-fixing plate, 120-cover plate, 121-first side plate, 122-louver, 123-rear limit block, 131-internal wiring terminal, 132-liquid cooling plate, 140-front cover, 141-ventilation hole, 142-cooling fan, 143-handle;

[0039] 211-film capacitor, 212-laminated busbar, 213-sheet metal module, 214-handle, 220-balance resistor, 230-IGBT module, 240-filter inductor, 250-main contactor, 260-power module, 270-Hall current sensor, 281-pre-charge contactor, 282-pre-charge resistor, 290-control board;

[0040] 300-high voltage box, 310-end face, 311-power off switch, 312-DC terminal, 313-DC isolating switch, 314-BMU wiring port. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0043] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left" and "right" etc. indicating directions or positional relationships are based on the directions 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 positions or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation of the present invention.

[0044] The utility model aims to provide a fusion type PCS energy storage conversion device, which can at least partially solve the problems of low integration of components in the PCS energy storage conversion device, large equipment volume, troublesome installation, high failure rate, etc.

[0045] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0046] Please refer to FIG. 1 , FIG. 4 , FIG. 6 and FIG. 7 . This embodiment provides a fusion type PCS energy storage and conversion device, including a box body, a PCS power unit and a high-voltage box 300 .

[0047] The box body includes a bottom plate 110 and a cover plate 120 , and the bottom plate 110 and the cover plate 120 can embrace each other to form a cavity structure with an accommodating space.

[0048] It can be understood that the bottom plate 110 and the cover plate 120 are both bent plate structures with multiple faces, and a cube structure with an internal accommodating space is formed by connecting the bottom plate 110 and the cover plate 120. The outer dimensions of the cube structure are preferably consistent with the outer dimensions of the existing battery pack, so that the box in this embodiment can be compatible with the cluster rack installation space and cluster entry tooling.

[0049] The PCS power unit is arranged inside the cavity structure.

[0050] A battery cluster management unit is provided inside the high-voltage box 300 . The high-voltage box 300 is detachably disposed in the cavity structure and is connected to the PCS power unit via the internal connection terminal 131 and the copper busbar located in the cavity structure.

[0051] It should be noted that the cavity structure includes a plurality of adjacent and spaced accommodating cavities, and the PCS power unit and the high-voltage box 300 installed in the cavity structure are located in different accommodating cavities, so that the PCS power unit and the high-voltage box 300 are different installation modules, to facilitate the separate installation and disassembly of the PCS power unit and the high-voltage box 300.

[0052] Specifically, by centrally arranging the PCS power unit and the high-voltage box 300 with a battery cluster management unit inside in the cavity structure of the box, the components are highly integrated, which improves the space utilization of the box for installing the PCS power unit, makes the structure compact and reduces the production cost; the high-voltage box 300 is connected to the PCS power unit through the internal wiring terminals 131 and copper busbars in the cavity structure, converting the original external wiring into internal wiring, making the box more neat and beautiful while also reducing the exposure of conductors and improving electrical safety performance; the high-voltage box 300 is detachable relative to the cavity structure, and can be easily and quickly disassembled and assembled, which is convenient for later maintenance.

[0053] Please refer to FIG. 2 , preferably, the bottom plate 110 includes a panel 111 disposed on one side of the box body, and the high-voltage box 300 can be moved into the cavity structure in a direction perpendicular to the panel 111 so that the end face 310 of the high-voltage box 300 is flush with the panel 111. The panel 111 is provided with an AC terminal 1111 for connecting external components, a quick-connect plug 1112, an optical fiber communication interface 1113, and a secondary wiring port 1114. The end face 310 is provided with a power-off switch 311, a DC terminal 312, a DC isolating switch 313, and a BMU wiring port 314, and the power-off switch 311 can disconnect the secondary circuit of the high-voltage box 300.

[0054] It is understandable that the high-voltage box 300 can be moved into the cavity structure in a direction perpendicular to the panel 111, and the end surface 310 can be flush with the panel 111. The end surface 310 is provided with a power-off switch 311, a DC terminal 312, a DC isolation switch 313 and a BMU wiring port 314. All the external port components are arranged on one side of the box structure, which is neat and avoids subsequent wiring clutter. Among them, the position of each port is adapted to the position of the components connected and located in the box to avoid too many wiring inside the box.

[0055] In addition, the power-off switch 311 has a one-touch auxiliary power-off function. When the battery pack is not used for a long time, in order to prevent the battery cells from being irreversibly damaged due to long-term low-voltage discharge, the power-off switch 311 can be manually or remotely operated to disconnect the secondary system high-voltage power supply circuit to ensure that there are no devices inside the PCS power unit and the high-voltage box 300 that consume the battery cell power, thereby avoiding failure of the entire energy storage system due to deep discharge, which contributes to the reliable operation of the energy storage system.

[0056] It should be noted that the external port only realizes the connection between the high-voltage box 300 and the external battery pack and the main control, while the connection between the high-voltage box 300 and the PCS power unit is set inside the box. When the high-voltage box 300 is installed into the box, the copper busbar between the high-voltage box 300 and the PCS is bolted and the internal terminal 131 is plug-in connected.

[0057] Preferably, the PCS power unit includes a capacitor bank, a balancing resistor 220, an IGBT module 230, a filter inductor 240, a main contactor 250, a power module 260, a Hall current sensor 270 and a pre-charge circuit. The capacitor bank includes a film capacitor 211 and a laminated busbar 212 located on the top of the film capacitor 211, and the balancing resistor 220 is connected to the laminated busbar 212 through a wire so that the balancing resistor 220 is connected in parallel with the film capacitor 211. The IGBT module 230 is connected to the AC terminal 1111 through an AC copper busbar, and the IGBT module 230 can output direct current to the connected laminated busbar 212, and the IGBT module 230 is located between the laminated busbar 212 and the panel 111. The filter inductor 240 is spaced apart on the side of the high-voltage box 300 away from the end face 310, and the main contactor 250, the power module 260 and the Hall current sensor 270 are provided between the filter inductor 240 and the capacitor bank. The pre-charging circuit includes a pre-charging contactor 281 and a pre-charging resistor 282 connected to both ends of the main contactor 250 through wires.

[0058] In this embodiment, the balancing resistor 220 is connected to the positive and negative electrodes of the laminated busbar 212 through a wire, forming a parallel relationship with the capacitor to play a voltage equalization role; the external cable is connected to the AC terminal 1111, and the AC terminal 1111 is connected to the IGBT module 230 through the AC copper busbar and connected to the laminated busbar 212 for outputting DC power. The negative electrode of the laminated busbar 212 leads out a DC copper bar and is connected to the negative electrode of the high-voltage box 300. The positive electrode of the laminated busbar 212 is connected to the filter inductor 240 through a cable, and is connected to the main contactor 250 through a copper bar and then connected to the positive copper bar of the high-voltage box 300, wherein the Hall current sensor 270 for detecting current is fixed on the last section of the positive copper bar.

[0059] In addition, the laminated busbar 212 is preferably located on the top of the thin film capacitor 211, the balancing resistor 220 is located on the side of the capacitor group away from the panel 111, the filter inductor 240 is arranged at intervals on the side of the high-voltage box 300 away from the end surface 310, and the main contactor 250, the power module 260, the pre-charge contactor 281 and the Hall current sensor 270 are all arranged between the filter inductor 240 and the capacitor group.

[0060] Please refer to Figure 3. In order to improve the heat dissipation effect, an embodiment is provided, in which a removable front cover 140 is provided between the panel 111 and the end surface 310, the front cover 140 is provided with ventilation holes 141, and the front cover 140 is provided with a cooling fan 142 on one side of the cavity structure, the cover plate 120 is provided with a first side plate 121 parallel to the panel 111, and the first side plate 121 is provided with a shutter 122, so that the air driven by the cooling fan 142 can flow along the ventilation holes 141 and the shutter 122; the panel 111 and the end surface 310 are both provided with a handle 143.

[0061] Preferably, a first side plate 121 in the cover plate 120 parallel to the panel 111 is provided with a shutter 122 that allows air to circulate to the inside and outside of the cavity structure. A ventilation hole 141 and a cooling fan 142 that can drive air movement are provided through the front cover 140, so that air can circulate along the ventilation hole 141 and the shutter 122 for heat dissipation inside the box, thereby improving the heat dissipation capacity and operational reliability of the system. The panel 111 and the end face 310 are both provided with a handle 143, which facilitates the installation and disassembly of the high-voltage box 300 and subsequent maintenance.

[0062] Preferably, a liquid cooling plate 132 is further provided in the cavity structure, and the liquid cooling plate 132 is located at the bottom of the IGBT module 230 to cool and dissipate heat of the PCS power unit. A control board 290 powered by the power module 260 is provided between the liquid cooling plate 132 and the cooling fan 142 .

[0063] It can be understood that the liquid cooling plate 132 used for cooling and dissipating the PCS power unit is preferably located at the bottom of the IGBT module 230. The heat dissipation effect is further promoted through the synergistic effect of the liquid cooling plate 132 and the above-mentioned cooling fan 142. In addition, a control board 290 is also provided between the liquid cooling plate 132 and the cooling fan 142. Power is drawn from nearby copper bars using wires through the power module 260 to maintain the operation of the control board 290.

[0064] Preferably, the bottom plate 110 further includes two second side plates which are parallel to each other and perpendicular to the panel 111 , and the second side plates are each provided with a lifting hole 112 for transporting the box.

[0065] Each second side plate is preferably provided with two lifting holes 112, and the two lifting holes 112 are spaced apart at the upper portion of the second side plate for transporting the box.

[0066] Preferably, the ends of the second side plates facing away from the first side plates 121 are provided with fixing plates 113, and the fixing plates 113 are bent structures, and the bent structures include a first bent plate that is fitted and connected to the second side plates, and a second bent plate that is perpendicular to the first bent plate and is used for installing and fixing the fusion type PCS energy storage and conversion device. The cover plate 120 includes an extension extending to the outside of the panel 111, and the end of the extension facing away from the first side plate 121 is provided with a through hole for fixing the external wire body, and the bottom of the first side plate 121 is provided with a rear limit block 123, which is used to limit the movement of the fusion type PCS energy storage and conversion device after installation.

[0067] Among them, the first bent plate and the second bent plate, which are perpendicular to each other, are connected and fixed with the second side plate, and then the second bent plate is connected through a connecting piece, so that the box body is fixed on the cluster frame, and then the integrated PCS energy storage and conversion device equipped with the PCS power unit and the high-voltage box 300 is installed and fixed on the cluster frame. At the same time, the rear limit block 123 provided at the bottom of the first side plate 121 can cooperate with the bent plate behind the cluster frame to limit the movement of the installed integrated PCS energy storage and conversion device.

[0068] In addition, the cover plate 120 has no openings on top and is provided with an extension portion extending outward from the panel 111. The extension portion acts as a waterproof curtain, which can improve the waterproof level of the box body, and the through holes on the extension portion facilitate subsequent wiring.

[0069] Please refer to FIG. 5 . Preferably, the capacitor bank further includes a sheet metal module 213 . The sheet metal module 213 is provided with a handle 214 capable of driving the capacitor bank to move. The capacitor bank is detachably arranged in the cavity structure by bolts.

[0070] It can be understood that the laminated busbar 212, several thin-film capacitors 211 and the sheet metal module 213 constitute a capacitor group. After the capacitor group is independently installed in other workstations, it can be placed in the box from top to bottom and removably fixed to the corresponding position by screws. Among them, the sheet metal module 213 is provided with a handle 214 that can drive the capacitor group to move, thereby facilitating the installation and disassembly process of the capacitor group.

[0071] Preferably, the bottom plate 110 and the cover plate 120 are connected by means of slots and bolts, and the bottom plate 110 and the cover plate 120 are relatively detachable.

[0072] In this embodiment, the base plate 110 and the cover plate 120 are preferably connected by means of slots and bolts. The connection and fixing method of the base plate 110 and the cover plate 120 can be adjusted according to actual conditions as long as the above purpose can be achieved.

[0073] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0074] 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.

[0075] The above is a detailed introduction to the embodiments provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A fusion PCS energy storage and conversion device, characterized in that: include: The box body comprises a bottom plate (110) and a cover plate (120), wherein the bottom plate (110) and the cover plate (120) can embrace each other to form a cavity structure with a containing space; A PCS power unit is arranged inside the cavity structure; A high-voltage box (300) is provided with a battery cluster management unit inside, and the high-voltage box (300) is detachably arranged in the cavity structure and connected to the PCS power unit via an internal connection terminal (131) and a copper busbar located in the cavity structure.

2. The integrated PCS energy storage and conversion device according to claim 1 is characterized in that: The bottom plate (110) comprises a panel (111) arranged on one side of the box body, and the high-voltage box (300) can be moved into the cavity structure along a direction perpendicular to the panel (111) so that an end surface (310) of the high-voltage box (300) is flush with the panel (111); The panel (111) is provided with an AC terminal (1111), a quick-connect plug (1112), an optical fiber communication interface (1113), and a secondary wiring port (1114) for connecting external components; The end surface (310) is provided with a power-off switch (311), a DC terminal (312), a DC isolating switch (313), and a BMU connection port (314); the power-off switch (311) is capable of disconnecting the secondary circuit of the high-voltage box (300).

3. The integrated PCS energy storage and conversion device according to claim 2 is characterized in that: The PCS power unit comprises: A capacitor group, comprising a film capacitor (211) and a laminated busbar (212) located on top of the film capacitor (211), wherein a balancing resistor (220) is connected to the laminated busbar (212) via a wire, so that the balancing resistor (220) is connected in parallel with the film capacitor (211); An IGBT module (230) connected to the AC terminal (1111) via an AC copper busbar, the IGBT module (230) being capable of outputting direct current to the connected laminated busbar (212), the IGBT module (230) being located between the laminated busbar (212) and the panel (111); A filter inductor (240) is arranged at intervals on a side of the high-voltage box (300) facing away from the end surface (310); a main contactor (250), a power module (260) and a Hall current sensor (270) are arranged between the filter inductor (240) and the capacitor group; The pre-charging circuit comprises a pre-charging contactor (281) and a pre-charging resistor (282) connected to two ends of the main contactor (250) via a wire.

4. The integrated PCS energy storage and conversion device according to claim 3 is characterized in that: A detachable front cover (140) is provided between the panel (111) and the end surface (310), the front cover (140) is provided with ventilation holes (141), a cooling fan (142) is provided on one side of the front cover (140) located at the cavity structure, the cover plate (120) is provided with a first side plate (121) parallel to the panel (111), and the first side plate (121) is provided with a louver (122) so that air driven by the cooling fan (142) can flow along the ventilation holes (141) and the louver (122); the panel (111) and the end surface (310) are both provided with handles (143).

5. The integrated PCS energy storage and conversion device according to claim 4 is characterized in that: A liquid cooling plate (132) is also provided in the cavity structure. The liquid cooling plate (132) is located at the bottom of the IGBT module (230) to cool and dissipate heat for the PCS power unit. A control board (290) powered by the power module (260) is provided between the liquid cooling plate (132) and the cooling fan (142).

6. The integrated PCS energy storage and conversion device according to claim 4 is characterized in that: The bottom plate (110) further comprises two second side plates which are parallel to each other and perpendicular to the panel (111), and the second side plates are each provided with a lifting hole (112) for transporting the box.

7. The integrated PCS energy storage and conversion device according to claim 6 is characterized in that: The ends of the second side plates facing away from the first side plates (121) are each provided with a fixing plate (113), the fixing plate (113) being in a bent structure, the bent structure comprising a first bent plate fitted and connected to the second side plate and a second bent plate perpendicular to the first bent plate and used for mounting and fixing the fusion-type PCS energy storage converter.

8. The integrated PCS energy storage and conversion device according to claim 6 is characterized in that: The cover plate (120) comprises an extension portion extending toward the outside of the panel (111); an end of the extension portion facing away from the first side plate (121) is provided with a through hole for fixing an external wire body; and a rear limit block (123) is provided at the bottom of the first side plate (121) for limiting the movement of the integrated PCS energy storage converter after installation.

9. The integrated PCS energy storage and conversion device according to claim 3 is characterized in that: The capacitor group further comprises a sheet metal module (213), the sheet metal module (213) being provided with a handle (214) capable of driving the capacitor group to move, and the capacitor group being detachably arranged in the cavity structure by means of bolts.

10. The integrated PCS energy storage and conversion device according to any one of claims 1 to 9, characterized in that: The bottom plate (110) and the cover plate (120) are connected via a slot and bolts, and the bottom plate (110) and the cover plate (120) are relatively detachable.

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