Energy storage converter

Abstract

The utility model discloses an energy storage converter, comprising a cabinet, the cabinet internally comprises a power control layer and a heat dissipation layer which are sequentially distributed from top to bottom, and the power control layer and the heat dissipation layer are independently distributed; an external panel and an air inlet hole are sequentially arranged on the side wall of the case from top to bottom, the external panel is located at the outer end of the power control layer, and the air inlet hole is located at the outer end of the heat dissipation layer. The power control layer and the heat dissipation layer are distributed up and down and are mutually independent, the heat dissipation of the whole machine is ensured through an up-and-down isolation mode, the waterproof and dustproof effects of devices in the power control layer are also realized, the devices in each layer are longitudinally distributed, the height of the whole energy storage converter is reduced, the internal space is also saved, and the energy storage converter is convenient to use. The size of the case is reduced, the space utilization rate is improved, and the power density of the modular energy storage converter is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage converters and relates to an energy storage converter. Background Art

[0002] The Power Conversion System (PCS) is a converter in the energy storage system that is connected between the battery system and the power grid or load to realize bidirectional conversion of electric energy. It converts AC to DC by controlling the charging and discharging process of the battery. It can directly supply power to AC loads without a power grid. It is an important component of the entire energy storage system.

[0003] In the related technology, the patent with announcement number CN217388523U discloses a modular energy storage converter, including a housing and a heat sink, a DC relay assembly, an IGBT assembly, a circuit board, an AC relay assembly, an inductor, a number of AC capacitors and a fan assembly, the heat sink is installed on the lower side of the IGBT assembly and the circuit board, the fan assembly is installed at one end close to the housing, and the fan assembly is also arranged adjacent to the heat sink and the circuit board. Its disadvantages are that the modules are arranged in three layers, which will occupy too much height dimension when arranged in the cabinet of the industrial and commercial energy storage system, and the space utilization rate in the depth direction is not high; the protection level and power density are low, while the mainstream high-power energy storage system and industrial and commercial energy storage system in the industry currently have high requirements for protection level and floor space, which is not conducive to system design; at the same time, its wiring method is three-phase three-wire, which is prone to three-phase voltage imbalance and unstable power supply system. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that the energy storage device occupies too much height dimension and space due to unreasonable layout, and occupies a large area. Due to the unreasonable layout, only a three-phase three-wire wiring method can be realized, which will cause three-phase voltage imbalance and unstable power supply system during use. An energy storage inverter is provided, which optimizes the electrical topology and structural layout, adopts a three-phase four-wire wiring method, compresses the height dimension, and utilizes the depth dimension to achieve a high protection level and high power density of the inverter. It can be applied to more environments and scenarios, and is more friendly to the design of energy storage systems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An energy storage converter comprises a chassis, wherein the chassis comprises a power control layer and a heat dissipation layer which are sequentially distributed from top to bottom, and the power control layer and the heat dissipation layer are independently distributed;

[0007] An external panel and an air inlet are arranged on the side wall at one end of the chassis in sequence from top to bottom. The external panel is located at the outer end of the power control layer, and the air inlet is located at the outer end of the heat dissipation layer.

[0008] The further improvement of the utility model is:

[0009] Two DC power terminals, a pluggable signal terminal, a status signal display light and four AC power terminals are sequentially distributed on the external panel in a transverse direction.

[0010] A ground terminal is arranged on a side of the DC power terminal away from the pluggable signal terminal.

[0011] A position inside the power control layer corresponding to the DC power terminal is connected in series in sequence with a fast fuse, a DC relay and a DC current sensor, and the DC current sensor is connected to an inverter board;

[0012] The inverter board is connected to the power board, and the power board is connected to the AC power terminal correspondingly inside and outside;

[0013] A control board is arranged between the power board and the fast fuse.

[0014] A second fan assembly is arranged on a side of the power board away from the AC power terminal.

[0015] An electrolytic capacitor plate is arranged on a side of the inverter board away from the DC current sensor;

[0016] A transformer is arranged on one side of the electrolytic capacitor plate.

[0017] The heat dissipation layer includes an inverter inductor, and the inverter inductor is located below the electrolytic capacitor plate;

[0018] A heat sink and a first fan assembly are sequentially distributed on one side of the inverter inductor close to the air inlet.

[0019] The first fan assembly includes a plurality of laterally arranged shaft-wheel fans.

[0020] A waterproof signal terminal is also provided between the first fan assembly and the air inlet.

[0021] A plurality of air inlet holes are provided.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model discloses an energy storage converter, in which a power control layer and a heat dissipation layer are distributed up and down, and the two layers are independent of each other. The upper and lower isolation method ensures the heat dissipation of the whole machine and realizes the waterproof and dustproof of the internal components of the power control layer. The components in each layer are distributed vertically, which reduces the height of the entire energy storage converter, saves internal space, reduces the volume of the chassis, improves the utilization rate of the space, and improves the power density of the modular energy storage converter.

[0024] Furthermore, in the utility model, the power control layer and the DC power terminals are internally connected in series with a fast fuse, a DC relay and a DC current sensor in sequence. The longitudinal series connection saves the internal horizontal space, so that the power board can connect to the four external AC power terminals, realizes the three-phase four-wire wiring method, and improves the stability of the power supply system.

[0025] Furthermore, in the utility model, a second fan assembly is provided on a side of the power board away from the AC power terminal and arranged at the rear side of the power board to dissipate heat from key heat generating parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is the overall structure diagram of the utility model;

[0028] Figure 2 This is the external structure diagram of the utility model;

[0029] Figure 3 It is a side structural diagram of the utility model;

[0030] Figure 4 This is the internal structure diagram of the power control layer of the utility model;

[0031] Figure 5 This is a diagram showing the internal structure of the heat dissipation layer of the present utility model.

[0032] Among them: 1-chassis; 2-external panel; 3-heat dissipation layer; 4-power control layer;

[0033] 101-top cover; 102-upper shell; 103-lower shell; 104-convenient cover; 105-handle assembly;

[0034] 201-DC power terminal; 202-pluggable signal terminal; 203-status signal display light; 204-AC power terminal; 205-ground terminal; 206-air inlet;

[0035] 301- waterproof signal terminal; 302- first fan assembly; 303- heat sink; 304- inverter inductor;

[0036] 401- fast fuse; 402- DC relay; 403- DC current sensor; 404- inverter board; 405- electrolytic capacitor board. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] The utility model is further described in detail below with reference to the accompanying drawings:

[0044] See also Figures 1 to 5 The utility model discloses an energy storage converter, which has the advantages of high space utilization, high protection level of the whole machine, high power density, and three-phase four-wire wiring method, and specifically includes the following structure:

[0045] See also Figure 1 The utility model embodiment discloses an energy storage converter, including a chassis 1, wherein the chassis 1 includes a power control layer 4 and a heat dissipation layer 3 distributed in sequence from top to bottom, and the power control layer 4 and the heat dissipation layer 3 are independently distributed; the side walls of the chassis 1 are provided with an external panel 2 and an air inlet 206 in sequence from top to bottom, the external panel 2 is located at the outer end of the power control layer 4, and the air inlet 206 is located at the outer end of the heat dissipation layer 3.

[0046] See also Figure 2 Furthermore, in the present invention, the power control layer 4 and the heat dissipation layer 3 form the chassis 1 into two layers, wherein the upper power control layer 4 includes a top cover 101 at the upper end and upper shells 102 at both sides, and a rubber strip is installed at the connection between the top cover 101 and the upper shell 102 to completely seal and form a closed space. A lower shell 103 is installed along the lower end of the upper shell 102, and a convenient cover plate 104 is set in the middle of 103.

[0047] Furthermore, in the present invention, the side wall where the external panel 2 is installed and located at the power control layer 4 is the front side of the chassis 1, and the handle assemblies 105 are installed at both ends of the front side wall.

[0048] See also Figure 3Furthermore, in the utility model, two DC power terminals 201 are installed near one end of the external panel 2, and four AC power terminals 204 are installed near the other end of the external panel 2 for external power electrical connection. A pluggable signal terminal 202 and a status signal display light 203 are installed on the side of the DC power terminal 201 close to the AC power terminal 204, and a grounding terminal 205 is also installed on the side of the DC power terminal 201 away from the pluggable signal terminal 202 for reliable grounding of the entire machine to the outside.

[0049] Furthermore, in the present invention, the protection level of all terminals and lamps is greater than or equal to IP66.

[0050] Furthermore, in the present invention, a plurality of air inlet holes 206 are provided, and the air inlet holes 206 are of a hexagonal structure.

[0051] See also Figure 4 , further, in this embodiment, the power control layer 4 is located at the left front part of the box body, which is the DC line area. The copper busbar is connected from the DC power terminal 201, and the fast fuse 401, DC relay 402 and DC current sensor 403 are connected in series in sequence, and then connected to the inverter board 404, wherein the fast fuse 401, DC relay 402 and DC current sensor 403 are arranged and distributed inward along the inner longitudinal direction of the power control layer 4, and the four-phase inverter board is connected in parallel through the copper busbar in the middle. IGBT is welded under the inverter board, and the driver board is integrated on the inverter board, and the driver board is integrated on the inverter board through the driver adapter board. The inverter board output side is connected to the inverter inductor 304, and the output line on the other side of the inverter inductor 304 is connected to the power board 408. The AC on the power board 408 is connected to the common mode inductor through the current Hall and the AC relay in sequence, and the common mode inductor is integrated on the power board, and finally the output line from the common mode inductor is connected to the AC power terminal 204.

[0052] The control board 409 is arranged in the center of the front end, and the second fan assembly 407 is arranged behind the power board 408 to dissipate heat from the key heating parts. The entire power and control layer is highly integrated, with high space utilization, convenient installation, orderly and regular overall structure, and clear functional division.

[0053] On the side of the inverter board 404 away from the DC current sensor 403, an electrolytic capacitor board 405 and a transformer 406 are installed in sequence horizontally, wherein the electrolytic capacitor board 405 is connected to the left terminal of the inverter board 404 through a wire; the transformer 406 is connected between the power board 408 and the AC power terminal 204 through a wire.

[0054] See also Figure 5Furthermore, in this embodiment, in the heat dissipation layer 3, the end face where the air inlet 206 is located is the front end, and the heat dissipation layer 3 is sequentially arranged with the waterproof signal terminal 301, the first fan assembly 302, the radiator 303 and the inverter inductor 304 from the front end to the rear end. The waterproof signal terminal 301 is used for fan power supply and signal transmission, the first fan assembly 302 includes a plurality of axial fans arranged horizontally, and there is a certain interval between the first fan assembly 302 and the air inlet 206. The axial fan provides wind to take away the heat emitted from the heat dissipation teeth of the radiator 303 and the inverter inductor 304. The heat dissipation layer 3 forms a wind duct from front to back to ensure the reliability of heat dissipation.

[0055] This device not only ensures the heat dissipation of the whole machine by isolating the upper and lower parts, but also realizes the high-level waterproof and dustproof of the modular energy storage converter. By rationally arranging the whole machine into a heat dissipation layer, a power and control layer, space is saved, the size of the chassis is reduced, and the power density of the modular energy storage converter is improved. The energy storage converter disclosed by the utility model has a compact structure, is easy to maintain, adopts a three-phase four-wire wiring method, has high electrical reliability, compresses the height dimension, and utilizes the depth dimension to achieve a high protection level and high power density of the converter. It can be applied to more environments and scenarios, and can also improve space utilization, which is conducive to reducing the footprint of the whole energy storage system.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. 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. An energy storage converter, characterized in that: Comprising a chassis (1), wherein the chassis (1) comprises a power control layer (4) and a heat dissipation layer (3) which are sequentially distributed from top to bottom, and the power control layer (4) and the heat dissipation layer (3) are independently distributed; An external panel (2) and an air inlet (206) are sequentially arranged on the side wall at one end of the chassis (1) from top to bottom, the external panel (2) being located at the outer end of the power control layer (4), and the air inlet (206) being located at the outer end of the heat dissipation layer (3).

2. The energy storage converter according to claim 1, characterized in that: Two DC power terminals (201), a pluggable signal terminal (202), a status signal display light (203) and four AC power terminals (204) are sequentially distributed laterally on the external panel (2).

3. An energy storage converter according to claim 2, characterized in that: A grounding terminal (205) is provided on a side of the DC power terminal (201) away from the pluggable signal terminal (202).

4. The energy storage converter according to claim 3, characterized in that: A fast fuse (401), a DC relay (402) and a DC current sensor (403) are sequentially connected in series at a position corresponding to the DC power terminal (201) inside the power control layer (4), and the DC current sensor (403) is connected to an inverter board (404); The inverter board (404) is connected to a power board (408), and the power board (408) is connected to the AC power terminal (204) internally and externally correspondingly; A control board (409) is provided between the power board (408) and the fast fuse (401).

5. The energy storage converter according to claim 4, characterized in that: A second fan assembly (407) is arranged on a side of the power board (408) away from the AC power terminal (204).

6. The energy storage converter according to claim 4, characterized in that: An electrolytic capacitor plate (405) is disposed on a side of the inverter plate (404) away from the DC current sensor (403); A transformer (406) is provided on one side of the electrolytic capacitor plate (405).

7. The energy storage converter according to claim 6, characterized in that: The heat dissipation layer (3) comprises an inverter inductor (304), and the inverter inductor (304) is located below the electrolytic capacitor plate (405); A heat sink (303) and a first fan assembly (302) are sequentially distributed on one side of the inverter inductor (304) close to the air inlet hole (206).

8. The energy storage converter according to claim 7, characterized in that: The first fan assembly (302) comprises a plurality of laterally arranged shaft-wheel fans.

9. The energy storage converter according to claim 7, characterized in that: A waterproof signal terminal (301) is also provided between the first fan assembly (302) and the air inlet hole (206).

10. The energy storage converter according to claim 1, characterized in that: A plurality of air inlet holes (206) are provided.

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