CN216981284U - Energy storage converter - Google Patents

Abstract

The application provides an energy storage converter, which relates to the field of converters and comprises a cabinet body, a heat dissipation fan and at least three power modules, wherein an air inlet channel, a first air cavity and a second air cavity which are communicated with each other are arranged in the cabinet body from bottom to top; the power module is arranged in the air inlet channel; the cooling fan is arranged in the second air chamber and used for generating air flow which enters from the air inlet and sequentially passes through the air inlet channel, the first air chamber and the second air chamber and flows out from the air outlet. The application provides an energy storage converter mainly solves the poor problem of power module radiating effect in the current air-cooled high-power energy storage converter.

Description

Energy storage converter

Technical Field

The application belongs to the field of converters, and particularly relates to an energy storage converter.

Background

The energy storage converter is a device which can convert external alternating current into direct current so as to store energy, and when the external alternating current is powered off and cannot supply power to equipment, the energy storage converter can convert the stored direct current into alternating current so as to provide electric energy for the external equipment, so that the external equipment can still normally operate.

With the application of new energy storage technology becoming more and more extensive, wherein the demand of a key device energy storage converter PCS becomes more and more great, the energy storage converter device is a device which takes devices such as a power module (containing an insulated gate bipolar transistor, the insulated gate bipolar transistor is abbreviated as IGBT), a direct current support capacitor, a reactor, a breaker and the like as main functional elements, realizes the mutual conversion of alternating current electric energy and direct current electric energy, monitors the data such as voltage, current and power, power and temperature and the like of an alternating current end and a direct current end of the energy storage converter, plays a role in charging and electric energy feedback, is one of key devices of an energy storage system, and provides a prerequisite for the vigorous development of a distributed power generation system and a micro grid system. Meanwhile, the PCS is used as a controllable energy storage power supply in the microgrid, the contradiction between a large power grid and a distributed power supply is solved, the microgrid can be connected with the large power grid for operation, and can also be disconnected from the main grid for independent operation when the power grid fails or is needed, and the safety, stability and economy of the power system are greatly improved.

Conventional energy storage converter PCS power has 50kW, 100kW, 250kW, 500kW and 630kW in the existing market, wherein the energy storage converter below 500kW is because power is less, core device IGBT gives out heat for a short time, the heat dissipation design degree of difficulty is little, power module volume and weight are also less, installation and maintenance are convenient, usually at cabinet top or cabinet back design cooling fan, the form of adopting convulsions dispels the heat to the cabinet body can, the energy storage converter of low-power section need not have special heat dissipation wind channel design even. However, the high-power energy storage converter IGBT has a large capacity and quantity and a large heat productivity, and if a conventional heat dissipation mode is used, a good heat dissipation air duct is not provided, so that a fault of overheating and overheating easily occurs, and the operation and the service life of equipment are seriously affected, so that a professional heat dissipation design needs to be performed on the high-power energy storage converter.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide an energy storage converter, which mainly solves the technical problem that a power module in the existing high-power energy storage converter is poor in heat dissipation effect.

To achieve the above object, the present application provides an energy storage converter, comprising:

the air conditioner comprises a cabinet body, wherein an air inlet channel, a first air chamber and a second air chamber which are communicated with each other are arranged in the cabinet body from bottom to top, and the cabinet body is provided with at least three air inlets communicated with the air inlet channel and at least two air outlets communicated with the second air chamber;

the power modules are arranged in the air inlet channel;

and the heat dissipation fan is arranged in the second air chamber and used for generating air flow which enters the air inlet channel and sequentially passes through the air inlet channel, the first air chamber and the second air chamber and is discharged from the air outlet.

In one embodiment, the plurality of power modules are sequentially arranged at intervals along the horizontal direction, the energy storage converter further comprises a capacitor assembly accommodated in the cabinet body, and the capacitor assembly is electrically connected with each power module.

In one embodiment, the power module comprises a housing, a heat sink, and an insulated gate bipolar transistor; the radiator comprises a heat conduction main body and a plurality of radiating fins; the shell and the heat conduction main body are jointly surrounded to form a heat dissipation channel communicated with the air inlet channel, the heat dissipation fins are respectively connected to the heat conduction main body and located in the heat dissipation channel, and the insulated gate bipolar transistor is connected to one surface, back to the heat dissipation fins, of the heat conduction main body; the shell is connected to the cabinet body.

In one embodiment, a partition plate is arranged in the cabinet body and horizontally arranged below the first air chamber; the partition board is provided with a first through hole which penetrates through the partition board in the longitudinal direction, the chamber bottom of the first air chamber is provided with a second through hole which penetrates through the partition board in the longitudinal direction, the power module abuts against the top of the partition board, the power module covers the first through hole, the heat dissipation channel is communicated with the first through hole, and the power module covers the second through hole and the heat dissipation channel is communicated with the second through hole.

In one embodiment, a first guide edge extends upwards from the edge of the top end of the first through hole, and a second guide edge extends downwards from the edge of the bottom end of the second through hole; the bottom end of the power module is inserted into the first guide edge, and the first guide edge is accommodated in the inner side of the power module; the top end of the power module is inserted into the second guide edge, and the second guide edge is contained in the inner side of the power module.

In one embodiment, the air outlet is formed in the top of the back face of the cabinet body, and the heat dissipation fan is a centrifugal fan.

In one embodiment, the heat dissipation fan comprises a fan blade part and a connecting part which are connected, and the connecting part is provided with an air outlet channel which longitudinally penetrates through the connecting part; the connecting portion connect in the room bottom of second wind cavity, just the air-out passageway intercommunication first wind cavity with second wind cavity, flabellum portion arrange in the top of connecting portion just is located on the extending direction of air-out passageway.

In one embodiment, a sponge block and a filter screen are sequentially paved on the inner side of the air inlet.

In one embodiment, the energy storage converter comprises a direct current unit cabinet and an alternating current unit cabinet which are arranged side by side, the direct current unit cabinet comprises a first cabinet frame and a first front door connected to the front of the first cabinet frame, the alternating current unit cabinet comprises a second cabinet frame and a second front door connected to the front of the second cabinet frame, the first front door and the second front door are both provided with at least one air inlet, the first cabinet frame and the second cabinet frame are part of the cabinet body, a first air cavity and a second air cavity are uniformly distributed in the first cabinet frame, and a power module and a cooling fan are both arranged in the first cabinet frame.

In one embodiment, the cabinet body comprises a back plate connected to the back of the first cabinet frame and the back of the second cabinet frame, a first air outlet and a second air outlet are formed in the top of the back plate, the first air outlet leads into the first cabinet frame, and the second air outlet leads into the second cabinet frame.

Compared with the prior art, the energy storage converter that this application provided's beneficial effect lies in:

when radiator fan operates, can drive the air intake entering of external air from the cabinet body front, and loop through inlet air channel, outwards discharge from the air outlet behind first wind cavity and the second wind cavity, wherein hot-air relaxes and the misce bene in first wind cavity, make radiator fan outwards derive the heat fast, thereby improve power module's radiating efficiency, and then satisfied high-power energy storage converter's heat dissipation demand, the heat radiation structure that this application adopted not only the cost is lower and the reliability is higher, the risk of traditional water-cooled heat radiation structure leaking has been avoided, and make energy storage converter have the advantage of being convenient for to maintain, thereby the competitiveness of energy storage converter product has been promoted.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic front structural diagram of an energy storage converter according to an embodiment of the present application;

fig. 2 is a schematic back-side structural diagram of an energy storage converter according to an embodiment of the present disclosure;

fig. 3 is a schematic internal structural diagram of the energy storage converter provided in the embodiment of the present application, as viewed from the left side;

fig. 4 is a schematic internal structural diagram of an energy storage converter provided in an embodiment of the present application, as viewed from the front;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;

fig. 6 is a schematic structural diagram of a power module according to an embodiment of the present disclosure;

fig. 7 is a schematic internal structural diagram of an energy storage converter according to an embodiment of the present application;

FIG. 8 is an enlarged view of a portion of FIG. 7 at A;

fig. 9 is a schematic structural diagram of an energy storage converter provided in an embodiment of the present application at another angle;

FIG. 10 is an enlarged view of a portion of FIG. 9 at A;

fig. 11 is a schematic structural diagram of a first front door according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of the first front door provided in the embodiment of the present application at another angle.

Wherein, in the figures, the respective reference numerals:

1. a direct current unit cabinet; 11. a first cabinet frame; 12. a first front door; 13. electric operation; 14. a power module; 15. a capacitive component; 16. a heat radiation fan;

111. a first air chamber; 1111. a second through hole; 1112. a second guide edge; 112. a second air chamber; 113. an air inlet channel;

121. an air inlet; 122. filtering cotton; 123. a filter screen;

141. an insulated gate bipolar transistor; 142. a housing; 143. a heat sink; 1431. a thermally conductive body; 1432. a heat sink; 144. a heat dissipation channel;

161. a fan blade portion; 162. a connecting portion; 1621. an air outlet channel;

2. an AC unit cabinet; 21. a second cabinet frame; 22. a second front door;

3. a channel steel base; 4. a back plate; 41. a first air outlet; 42. a second air outlet;

5. a top plate; 6. a partition plate; 61. a first through hole; 62. a first guide edge; 10. a cabinet body.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in operation as a limitation of the application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1, an energy storage converter provided in an embodiment of the present application will be described. The energy storage converter comprises a direct current unit cabinet 1 and an alternating current unit cabinet 2 which are arranged side by side from left to right, and the direct current unit cabinet 1 and the alternating current unit cabinet 2 are arranged side by side in the prior art, so that on one hand, the electromagnetic shielding is needed between the two cabinets, and on the other hand, the convenience in separate assembly and separate maintenance is realized. In another embodiment, the dc unit cabinet 1 and the ac unit cabinet 2 may be arranged side by side in the front-rear direction.

Referring to fig. 1 and fig. 2, the energy storage converter further includes a channel steel base 3, a plurality of back plates 4, and a top plate 5. Wherein the bottom of direct current unit cabinet 1 and the bottom of interchange unit cabinet 2 are connected to channel-section steel base 3, wherein the back of direct current unit cabinet 1 and the back of interchange unit cabinet 2 are connected to backplate 4, wherein the top of direct current unit cabinet 1 and the top of interchange unit cabinet 2 are connected to roof 5, and is equivalent to, channel-section steel base 3, backplate 4 and roof 5 can let direct current unit cabinet 1 and interchange unit cabinet 2 close together reliably, and still make energy storage converter whole look more like only one cabinet, and is more pleasing to the eye neat and tidy.

Referring to fig. 1, 3 and 4, the direct current unit cabinet 1 includes a first cabinet frame 11 and a first front door 12 hinged in front of the first cabinet frame 11, and two air inlets 121 longitudinally arranged are opened on the first front door 12, so that the external air can enter the air inlet channel 113 inside the first cabinet frame 11.

Referring to fig. 1, 3 and 4, the ac unit cabinet 2 includes a second cabinet frame 21 and a second front door 22 hinged to the front of the second cabinet frame 21, and the second front door 22 is provided with an air inlet 121 so that the outside air can enter into the second cabinet frame 21.

It should be noted that the cabinet body 10 of the energy storage converter is composed of the first cabinet frame 11, the second cabinet frame 21, the channel steel base 3, the plurality of back plates 4, and the top plate 5.

Referring to fig. 2, the topmost back plate 4 is provided with a first air outlet 41 and a second air outlet 42 penetrating in the front-back direction, and the first air outlet 41 and the second air outlet 42 are both in a mesh air outlet structure. The first outlet 41 is connected to the dc unit cabinet 1, so that heat in the dc unit cabinet 1 can be discharged from the first outlet 41, and the second outlet 42 is connected to the ac unit cabinet 2, so that heat in the ac unit cabinet 2 can be discharged from the second outlet 42.

Referring to fig. 3-5, the dc unit cabinet 1 includes an electric operating unit 13, a plurality of power modules 14, a capacitor assembly 15, and a heat dissipation fan 16, in addition to the first cabinet frame 11 and the first front door 12. Wherein the electric operator 13 is accommodated at the bottom of the first cabinet frame 11. A plurality of power module 14 horizontal interval holding is at the middle part of first tank bracket 11, and electric capacity component 15 also holds at the middle part of first tank bracket 11 and is located power module 14's rear, and cooling fan 16 holding is at the top of first tank bracket 11.

Specifically, referring to fig. 4 and fig. 6, the power module 14 mainly includes an igbt 141, a housing 142, a heat sink 143, and a driver (not shown) for driving the igbt 141, wherein the heat sink 143 further includes a heat conductive body 1431 and a plurality of heat dissipation fins 1432. The housing 142 and the heat conductive body 1431 jointly enclose a heat dissipation channel 144, and when the power module 14 is accommodated in the first cabinet frame 11, the heat dissipation channel 144 extends in a vertical direction. The heat dissipation fins 1432 are all connected to the same side of the heat conductive body 1431 and located in the heat dissipation channel 144, and the igbt 141 is connected to a side of the heat conductive body 1431 opposite to the heat dissipation fins 1432. During operation, the outside air passes through the air inlet 121 and then passes through the heat dissipation channel 144, and at this time, the heat emitted by the igbt 141 is taken away, so that the effect of cooling the igbt 141 is achieved, and the heat dissipation fins 1432 can increase the contact area between the heat sink 143 and the heat dissipation channel 144, thereby increasing the heat dissipation efficiency of the igbt 141.

More specifically, the conventional power module 14 is integrated with a capacitor, so the volume of the conventional power module 14 is very large, especially the height of the conventional power module 14 is very high, so the heat dissipation channel 144 of the conventional power module 14 is very long, and therefore, for a high-power energy storage converter, the heat dissipated by the plurality of igbt 141 inside the conventional power module 14 cannot be dissipated in time. Referring to fig. 3, the power module 14 of the present embodiment retains the igbts 141, integrates the capacitors inside the conventional power module 14 into the capacitor assembly 15, and then the capacitor assembly 15 is disposed behind the power module 14 and electrically connected to the igbts 141 of the power modules 14, so that the volume of the power module 14 can be made smaller, especially the height of the power module 14 can be made smaller, the length of the heat dissipation channel 144 can be greatly shortened, and the heat dissipation efficiency of the igbts 141 can be greatly improved. In addition, the installation position of the capacitor assembly 15 can facilitate the operator to take out or install each power module 14 from the front, and also facilitate the capacitor assembly 15 to be quickly connected to the igbt 141 in each power module 14 through the copper bar.

Further, referring to fig. 5, a first wind chamber 111 and a second wind chamber 112 are disposed at the top of the first cabinet frame 11, and the first wind chamber 111 is disposed right below the second wind chamber 112. Referring to fig. 3, fig. 3 is a schematic diagram showing an internal structure of the converter cabinet with a left side plate removed, the left side plate removed in fig. 3 is one of the parts forming the first air chamber 111 and also one of the parts forming the second air chamber 112, as shown in fig. 3 and 5, the power module 14 is disposed below the first air chamber 111, and the heat dissipation channel 144 in the power module 14 is communicated with the first air chamber 111, so that hot air in the heat dissipation channel 144 can enter the first air chamber 111. The heat dissipation fan 16 is disposed in the second air chamber 112, and the heat dissipation fan 16 is used for communicating the first air chamber 111 with the second air chamber 112 and blowing the hot air in the first air chamber 111 to the first air outlet 41 on the back, so that the hot air can be discharged to the outside.

In the present embodiment, since the first air outlet 41 is designed on the back, the heat dissipation fan 16 is preferably a centrifugal fan. Referring to fig. 3 and 5, the heat dissipation fan 16 includes a blade portion 161 and a connecting portion 162 connected to each other, the connecting portion 162 and the bottom of the second air chamber 112, an air outlet channel 1621 longitudinally penetrating is formed in the connecting portion 162, the air outlet channel 1621 is communicated with the first air chamber 111 and the second air chamber 112, and the blade portion 161 is disposed at the top of the connecting portion 162 and located in the extending direction of the air outlet channel 1621. When the fan blade 161 rotates, the hot air in the first air chamber 111 can be driven to enter the second air chamber 112, and then the hot air is driven to be discharged from the first air outlet 41.

In other embodiments, the first air outlet 41 may also be disposed on the top plate 5, and the heat dissipation fan 16 drives the hot air in the second air chamber 112 to be exhausted from the top of the cabinet 10.

Further, in order to make the air entering the cabinet 10 from the outside pass through the heat dissipation channel 144 of the power module 14 and enter the first air chamber 111 as much as possible, please refer to fig. 7 and 9, the converter cabinet of the present embodiment further includes a partition plate 6, the partition plate 6 is accommodated in the first cabinet frame 11 and located right below the first air chamber 111, and the top end surfaces of the partition plate 6 respectively carry the plurality of power modules 14. Specifically, the partition plate 6 is provided with a plurality of first through holes 61 which longitudinally penetrate through the partition plate, and the bottoms of the plurality of power modules 14 respectively cover the corresponding first through holes 61, so that air entering the cabinet 10 from the outside enters the heat dissipation channel 144 of the power module 14 through the first through holes 61 as much as possible, that is, the air entering the cabinet 10 from the outside does not stay at a position which is irrelevant to heat dissipation of the insulated gate bipolar transistor 141, thereby improving the heat dissipation efficiency of the insulated gate bipolar transistor 141. Specifically, referring to fig. 8, in this embodiment, a first guiding edge 62 protruding upward is further disposed on the top end surface of the partition board 6, and the length direction of the first guiding edge 62 is the same as the front-back direction, so that the power module 14 can be inserted along the first guiding edge 62, thereby facilitating the detachment or installation of the power module 14. Meanwhile, after the power module 14 is inserted along the first guiding edge 62, the first guiding edge 62 is accommodated inside the power module 14, so that the air entering the heat dissipation channel 144 from the first through hole 61 will not leak too much to the left side or the right side of the bottom of the power module 14, and will only go upwards along the heat dissipation channel 144, thereby improving the heat dissipation efficiency of the igbt 141.

Referring to fig. 9 and 10, a plurality of second through holes 1111 are formed in the bottom of the first air chamber 111, the second through holes 1111 respectively communicate the heat dissipation channel 144 of each power module 14 with the first air chamber 111, and the top of each power module 14 covers each corresponding second through hole 1111, so that most of the hot air in the heat dissipation channel 144 can only enter the first air chamber 111. Specifically, the present embodiment further provides a second guiding edge 1112 protruding downward at the bottom of the second through hole 1111, and the length direction of the second guiding edge 1112 is the same as the front-back direction, so that the power module 14 can also be inserted along the second guiding edge 1112, thereby facilitating the detachment or installation of the power module 14. Meanwhile, when the power module 14 is inserted along the second guiding edge 1112, the second guiding edge 1112 is accommodated inside the power module 14, so that the air in the heat dissipation channel 144 will not leak to the left or right of the top of the power module 14 too much, and only enters the first air chamber 111 and is discharged outside quickly, thereby further improving the heat dissipation efficiency of the igbt 141.

Referring to fig. 1-2 and fig. 5-6 together, wherein the straight arrow in fig. 5 indicates the direction of air in the dc unit cabinet 1, the heat dissipation air path of the energy storage converter of the present embodiment is as follows: when the heat dissipation fan 16 operates, the external air can be driven to enter the cabinet body 10 from the air inlet 121 on the front side, at this time, a part of air enters the air inlet channel 113 inside the dc unit cabinet 1, another part of air enters the ac unit cabinet 2, and then the air inside the dc unit cabinet 1 sequentially passes through the first through hole 61 of the partition plate 6, the heat dissipation channel 144 of the power module 14, the second through hole 1111, the first air chamber 111, the second air chamber 112, and the first air outlet 41 and then is discharged outside, so that the heat of the insulated gate bipolar transistor 141 is taken away, wherein the first air chamber 111 can relax and mix the hot air uniformly, so that the heat can be rapidly led out by the heat dissipation fan 16, and the heat dissipation efficiency of the insulated gate bipolar transistor 141 is improved. At the same time, the air in the ac unit cabinet 2 will be exhausted from the second air outlet 42 at the back.

In addition, in order to avoid a large amount of dust from entering the cabinet 10, please refer to fig. 11 and 12, in this embodiment, a layer of filter cotton 122 and a filter screen 123 are sequentially laid on the inner side of the air inlet 121, and the filter cotton 122 is clamped between the filter screen 123 and the front door, so that the outside air can enter the cabinet 10 after passing through the layer of filter cotton 122, thereby preventing a large amount of dust from entering the cabinet 10, improving the stability of the energy storage converter and prolonging the service life of the energy storage converter.

In summary, compared with the best heat dissipation technology, namely water cooling heat dissipation, of the existing high-power energy storage converter, the power module 14 in the high-power energy storage converter is cooled by adopting a forced air cooling mode through a reasonable and effective heat dissipation air duct design, and under the condition that the heat dissipation can be met, the equipment investment cost is lower, the installation and maintenance are more convenient, and the later maintenance workload is relatively smaller.

The foregoing is considered as illustrative only of the preferred embodiments of the utility model, and is presented merely for purposes of illustration and description of the principles of the utility model and is not intended to limit the scope of the utility model in any way. Any modifications, equivalents and improvements made within the spirit and principles of the utility model and other embodiments of the utility model without the exercise of inventive faculty will be appreciated by those skilled in the art and are intended to be included within the scope of the utility model.

Claims (10)

1. An energy storage converter, comprising:

the air conditioner comprises a cabinet body, wherein an air inlet channel, a first air chamber and a second air chamber which are communicated with each other are arranged in the cabinet body from bottom to top, and the cabinet body is provided with at least three air inlets communicated with the air inlet channel and at least two air outlets communicated with the second air chamber;

the power modules are arranged in the air inlet channel;

and the heat dissipation fan is arranged in the second air cavity and used for generating air flow which enters from the air inlet and sequentially passes through the air inlet channel, the first air cavity and the second air cavity and is discharged from the air outlet.

2. The energy storage converter of claim 1, wherein: the plurality of power modules are sequentially arranged at intervals along the horizontal direction, the energy storage converter further comprises a capacitor assembly accommodated in the cabinet body, and the capacitor assembly is electrically connected with each power module respectively.

3. The energy storage converter as claimed in claim 1, wherein: the power module comprises a shell, a radiator and an insulated gate bipolar transistor;

the radiator comprises a heat conduction main body and a plurality of radiating fins;

the shell and the heat conduction main body are jointly surrounded to form a heat dissipation channel communicated with the air inlet channel, the heat dissipation fins are respectively connected to the heat conduction main body and located in the heat dissipation channel, and the insulated gate bipolar transistor is connected to one surface, back to the heat dissipation fins, of the heat conduction main body; the shell is connected to the cabinet body.

4. The energy storage converter as claimed in claim 3, wherein: a partition plate is arranged in the cabinet body and horizontally arranged below the first air chamber;

the partition board is provided with a first through hole which penetrates through the partition board in the longitudinal direction, the chamber bottom of the first air chamber is provided with a second through hole which penetrates through the partition board in the longitudinal direction, the power module abuts against the top of the partition board, the power module covers the first through hole, the heat dissipation channel is communicated with the first through hole, and the power module covers the second through hole and the heat dissipation channel is communicated with the second through hole.

5. The energy storage converter as claimed in claim 4, wherein: a first guide edge extends upwards from the edge of the top end of the first through hole, and a second guide edge extends downwards from the edge of the bottom end of the second through hole;

the bottom end of the power module is inserted into the first guide edge, and the first guide edge is contained in the inner side of the power module;

the top end of the power module is inserted into the second guide edge, and the second guide edge is contained in the inner side of the power module.

6. The energy storage converter of claim 1, wherein: the air outlet sets up the top at the cabinet body back, radiator fan is centrifugal fan.

7. The energy storage converter as claimed in claim 6, wherein: the heat dissipation fan comprises a fan blade part and a connecting part which are connected, and the connecting part is provided with an air outlet channel which longitudinally penetrates through the connecting part;

the connecting portion connect in the room bottom of second wind cavity, just the air-out passageway intercommunication first wind cavity with second wind cavity, flabellum portion arrange in the top of connecting portion just is located on the extending direction of air-out passageway.

8. The energy storage converter as claimed in claim 1, wherein: and a sponge block and a filter screen are sequentially paved on the inner side of the air inlet.

9. The energy storage converter according to any of claims 1-8, wherein: energy storage converter is including the direct current unit cabinet and the interchange unit cabinet of arranging side by side, direct current unit cabinet include first tank bracket and connect in first qianmen in first tank bracket the place ahead, exchange the unit cabinet include the second tank bracket and connect in second tank bracket the place ahead second qianmen, first qianmen is equipped with at least two the air intake, the second qianmen is equipped with at least one the air intake, first tank bracket with the second tank bracket is a part of the cabinet body, first wind cavity and second wind cavity equipartition are arranged in the first tank bracket, power module with radiator fan all set up in the first tank bracket.

10. The energy storage converter as claimed in claim 9, wherein: the cabinet body including connect in first tank bracket with the backplate at second tank bracket back, first air outlet and second air outlet have been seted up at the top of backplate, first air outlet accesss to in the first tank bracket, the second air outlet accesss to in the second tank bracket.

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