JP2018042457A - Electric power conversion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric power conversion device capable of preventing the rise of an inner temperature.SOLUTION: The electric power conversion device according to the present invention can includes: a first housing formed to have an inner space by coupling a front case and a rear case; a second housing that is arranged to be separated from the first housing, and includes a housing space in the inside thereof; a connection part that is arranged between the first and second housings, and connects the first and second housings; and a thermal insulation space that is formed between the first and second housings, and prevent a heat generated in each of the first and second housings from being transmitted to each other. Thus, by separately housing an electric power conversion element that relatively generates a high heat and a reactor, a temperature of the electric power conversion device can be prevented from increasing. A water droplet or the like can be prevented from penetrating into the inside of each housing through a through-hole.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a power conversion device.

  The Energy Storage System stores power generated from a power plant and supplied to a power system or generated from renewable energy such as solar power, wind power, and hydropower in a storage system including a battery. Later, the system is used selectively and efficiently when power is needed to increase energy efficiency.

  If an energy storage system is used, it is possible to level an electric load that varies greatly with time and season. Thereby, the overall load factor can be improved. And a power generation unit price can be lowered. In addition, it is possible to reduce the investment cost and operation cost required for the addition of power facilities. In addition, electricity charges can be reduced and energy can be saved.

  Such an energy storage system is installed in cooperation with a power system, a power generation device, power transmission / distribution, a consumer, etc., and adjusts the frequency (Frequency Regulation), stabilizes the generator output using regenerative energy, and reduces peak shaving ( It is used for functions such as Peak Shaving, Load Leveling, and emergency power supply.

  Energy storage systems are roughly classified into physical energy storage and chemical energy storage according to storage methods. Physical energy storage includes a method using pumped water power generation, compressed air storage, flywheel, and the like, and chemical energy storage includes a method using a lithium ion battery, a lead storage battery, a Nas battery, and the like.

  Therefore, the energy storage system supplies power by discharging the charged power when power is required. Thereby, the energy storage system can supply electric power in a fluid manner.

  On the other hand, the energy storage system converts a battery module that can store electric energy and electric energy suitable for charging so that the electric energy supplied from the outside can be charged to the battery module, or is stored in the battery module. A power conversion device that can convert electrical energy into electrical energy required by a customer can be included.

  The power conversion device can convert, for example, electrical energy in the form of direct current (DC) power generated by absorbing light from the sun into electrical energy in the form of alternating current (AC) power required by the customer. And the electrical energy stored in the battery module can be converted into electrical energy in the form of alternating current (AC) or direct current (DC) power required by the customer.

  That is, the power conversion device can perform the function of converting the characteristics of electrical energy required by each customer.

  And since the said power converter device discharge | releases much heat | fever with a power conversion element etc. in the process in which the characteristic of an electrical energy is converted, it can be said that heat discharge | release of a power converter device is an important problem.

Korean Published Patent Publication No. 10-2013-0116742 “Solar Power Converter”

  According to the above prior art, there is disclosed a configuration in which a reactor is brought into contact with a heat sink and thermal grease is interposed between the reactor and the heat sink for heat dissipation of the power conversion device. However, there is a limit to obtaining sufficient heat dissipation.

  The present invention can provide a power conversion device in which a plurality of heat sources that generate heat can be separated from each other to prevent the internal temperature from rising due to different heat sources.

  The present invention can provide a power conversion device that can prevent foreign matters such as water droplets from penetrating through a hole through which an electric wire or the like can penetrate.

  That is, this invention can provide the power converter device which can improve heat dissipation efficiency and a waterproof effect.

  The power conversion device according to the present invention may include a first housing and a second housing.

  Further, the first housing may be formed to have an internal space by coupling the front case and the rear case.

  The second housing may be spaced apart from the first housing and may have an accommodating space therein.

  In addition, a circuit board and a power conversion element for converting power can be disposed in the internal space of the first housing.

  The rear case of the first housing is provided with a heat radiating fin for releasing heat generated by the power conversion element to the outside.

  In addition, a reactor for converting electric power can be disposed in the accommodation space of the second housing.

  Further, the first housing and the second housing have a first through hole and a second through hole through which an electric wire electrically connecting components housed in the first housing and the second housing can pass. Provided respectively.

  Each of the first through hole and the second through hole is provided with a seal portion that seals the first through hole and the second through hole in a state where the electric wire is disposed.

  The first housing and the second housing are connected to each other by a connecting portion in a state of being separated from each other.

  In addition, a heat insulating space is provided between the first housing and the second housing to prevent heat generated in each of the first housing and the second housing from being transmitted to each other. And

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the temperature of a power converter device rises by isolate | separating and accommodating the power converter element and reactor which generate a comparatively high heat | fever.

  ADVANTAGE OF THE INVENTION According to this invention, the power converter device which can prevent that a water drop etc. osmose | permeate the inside of a housing through the through-hole which can pass the electric wire which electrically connects a power converter element and a reactor can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, the heat | fever generated by a power converter element and the heat | fever which generate | occur | produces by a reactor are each discharge | released outside, and the power converter device with which stability of the product improved can be provided.

It is a front perspective view of the power converter device concerning a present Example. It is a back perspective view of the power converter concerning this example. It is sectional drawing which cut | disconnected the AA area | region of FIG. It is a disassembled perspective view of the power converter device which concerns on a present Example. It is a disassembled perspective view of the reactor housing which concerns on a present Example. It is sectional drawing which cut | disconnected the BB area | region of FIG.

  Hereinafter, embodiments related to the present invention will be described in more detail with reference to the drawings. The suffixes “module” and “part” for the components used in the following description have meanings or roles that are distinguished from each other as they are given or mixed in consideration of easy preparation of the specification. It is not a thing.

  In describing the embodiments of the present invention, when it is determined that a specific description of a known function or configuration may obscure the gist of the present invention, a detailed description thereof will be omitted. The terms described later are terms defined in consideration of the functions in the embodiments of the present invention, and may be different depending on the user, the intention of the operator, the custom, or the like. Therefore, the definition should be made based on the contents throughout this specification.

  Those skilled in the art who understand the idea of the present invention can easily embody other embodiments included in the scope of the same idea by adding, changing, deleting, and adding components. However, this is also included within the scope of the idea of the present invention.

  In addition, the accompanying drawings are expressed differently for each drawing in terms of minute portions so that the drawings can be easily understood within the scope of not impairing the inventive concept in spite of the same embodiment. Or may be exaggerated in accordance with the drawings.

  FIG. 1 is a front perspective view of the power converter according to the present embodiment, and FIG. 2 is a rear perspective view of the power converter according to the present embodiment.

  1 and 2, the power conversion apparatus 1 according to the present embodiment may include a housing 10 that forms a body. An internal space may be formed in the housing 10. In the internal space, a circuit board 13 (see FIG. 3), power conversion elements 131 and 132 (see FIG. 3), and the like constituting the power conversion device 1 can be arranged.

  The housing 10 can be formed to be separable. The housing 10 is provided by coupling a front case 11 and a rear case 12 (see FIG. 2). The front case 11 may provide a front surface of the housing 10. The rear case 12 can provide a rear surface of the housing 10. The front case 11 and the rear case 12 can be fitted and coupled to each other. For example, the front case 11 and the rear case 12 may be formed in a polygon having an opening in the direction facing each other.

  When the front case 11 is provided larger than the rear case 12, the front case 11 can cover the rear case 12 to form a body. Further, when the rear case 12 is provided larger than the front case 11, the rear case 12 covers the front case 11 to form a body. However, the present invention is not limited to this concept, and in this embodiment, the front case 11 covers the rear case 12 and forms a body.

  A display unit 101 that indicates an operating state of the power converter 1 is provided on the front surface of the housing 10.

  In detail, the display unit 101 is provided on the front case 11. The front case 11 is provided with an insertion hole 111 (see FIG. 4) so that the display unit 101 can be mounted. The display unit 101 is inserted into the insertion hole 111 and fixed by a fastening member. The display unit 101 can be connected to a circuit board accommodated in the housing 10 to operate. The display unit 101 can be provided as a touch display that not only shows the operation state of the power conversion device 1 to the outside but also receives an operation signal input from the outside. However, it is not limited to such an idea.

  The reactor 10 may further include a reactor housing 20 that has a housing space separate from the housing 10 and is disposed so as to be separated from the housing 10. At this time, the housing 10 can be referred to as a “first housing” of the power conversion device 1. The reactor housing 20 can be called a “second housing” of the power conversion device 1.

  In the present embodiment, it can be understood that the reactor 23 is referred to as the reactor housing 20 by accommodating the reactor 23 (see FIG. 3) in the second housing. However, the present invention is not limited to this, and not only the reactor 23 but also other components or elements can be accommodated in the second housing. It may be possible to add not only the second housing but also a third housing, a fourth housing, and the like.

  And, the components that can be accommodated in each housing, that is, a large number of power conversion components provided to convert power, are referred to as “first power component”, “second power component”, etc. Can be called.

  For example, a component housed in the first housing can be referred to as a first power component, and the first power component can include the circuit board 13, the power conversion elements 131 and 132, and the like. The component housed in the second housing can be called a second power component, and the second power component can include the reactor 23. However, it is not limited to such an idea.

  The reactor housing 20 and the housing 10 are connected to each other by a connecting portion 30. The connecting portion 30 is formed to protrude from the reactor housing 20. Further, the connecting part 30 is formed to protrude from the housing 10. However, it is not limited to such an idea.

  The rear surface of the housing 10 is provided with heat radiating fins 121 for releasing heat generated by the power conversion elements 131 and 132 accommodated in the internal space of the housing 10 to the outside.

  Specifically, the heat radiating fins 121 protrude in a direction toward the rear of the rear case 12. A plurality of the radiating fins 121 are provided. The plurality of heat radiating fins 121 may be spaced apart from each other. The heat dissipating fins 121 may be formed integrally with the rear case 12.

  Then, heat can be received from the power conversion elements 131 and 132 accommodated in the internal space of the housing 10 and released to the outside. That is, the radiation fins 121 can be disposed at positions corresponding to the power conversion elements 131 and 132 disposed in the internal space of the housing 10. The heat radiating fins 121 of the present embodiment are illustrated as being disposed on both sides with respect to the reactor housing 20 (see FIGS. 2 and 3).

  Fixing portions 41 and 42 for fixing the housing 10 to a fixing structure such as a wall or a support stand are provided on the rear surface of the housing 10.

  In detail, the housing 10 can be fixed to a fixing structure such as a wall or a support by the fixing portions 41 and 42. The fixing parts 41 and 42 may include an upper fixing part 41 and a lower fixing part 42. The fixing portions 41 and 42 are fixed to the rear case 12, and the fixing portions 41 and 42 are fixed to a fixing structure such as a wall or a support base, so that the housing 10 is fixed to a wall or a support base or the like. Such a fixed structure is supported.

  The upper fixing part 41 may be disposed on the rear case 12. The upper fixing part 41 is connected to the heat radiating fins 121. The upper fixing part 41 is connected to the heat radiating fins 121 and coupled to the rear surface of the rear case 12. If the upper fixing part 41 is applied to a fixing structure such as a wall or a support base, the rear case 12 is fixed. However, the present invention is not limited to this idea, and the upper fixing portion 41 can be fastened to a fixing structure such as a wall or a support by a fastening member.

  The lower fixing part 42 may be disposed under the rear case 12. The lower fixing part 42 may be disposed on the same line as the upper fixing part 41. That is, the lower fixing part 42 can be arranged to be separated from the rear case 12. At this time, a support portion 123 that connects the lower fixing portion 42 and the rear case 12 is provided. The support part 123 and the lower fixing part 42 are connected to each other. The lower fixing portion 42 can be fixed to a fixing structure such as the wall or a support base by a fastening member.

  The support part 123 is provided to protrude rearward from the rear case 12. The support part 123 is connected to the lower fixing part 42. That is, the lower fixing part 42 is connected to the support part 123 protruding rearward from the rear case 12 so that the lower fixing part 42 can be arranged on the same line as the upper fixing part 41. With such a configuration, the housing 10 is supported in a parallel direction without being inclined even if the housing 10 is fixed to a fixing structure such as a wall or a support base.

  FIG. 3 is a cross-sectional view taken along a line AA in FIG.

  Referring to FIG. 3, the circuit board 13 and the power conversion elements 131 and 132 can be disposed inside the housing 10 according to the present embodiment. The circuit board 13 and the power conversion elements 131 and 132 are electrically connected to each other.

  The circuit board 13 may be provided as a printed circuit board. A large number of elements can be mounted on the circuit board 13. The power conversion elements 131 and 132 are connected to the circuit board 13.

  The power conversion elements 131 and 132 can be provided as IGBTs, for example. The power conversion elements 131 and 132 can release high-temperature heat in the process of converting power as a core part for converting power in the power conversion device 1.

  Accordingly, in order to dissipate the heat generated in the power conversion elements 131 and 132 to the outside, the rear case 12 is provided with radiating fins 121. The power conversion elements 131 and 132 are directly connected to the rear case 12.

  That is, the power conversion elements 131 and 132 directly contact the rear case 12 to release heat, and the released heat is radiated to a position where the power conversion elements 131 and 132 are disposed. It is transmitted to the fin 121 and transmitted to the outside.

  At this time, the rear case 12 and the heat dissipating fins 121 provided with the power conversion elements 131 and 132 can be provided as materials having high thermal conductivity. For example, the rear case 12 and the heat dissipating fins 121 can be understood as a single heat sink. However, it is not limited to such an idea.

  The reactor 23 can be arrange | positioned inside the reactor housing 20 which concerns on a present Example. The reactor 23 can perform a function of stabilizing power applied from the outside or stabilizing power converted by the power conversion elements 131 and 132. The reactor 23 generates high-temperature heat in order to stabilize the electric power applied to the reactor 23. Therefore, the reactor 23 can operate as a heat source that generates high-temperature heat in the power conversion device 1 like the power conversion elements 131 and 132.

  The heat generated in the reactor 23 is transmitted to the reactor housing 20, and the heat transmitted to the reactor housing 20 can be released to the outside. In addition, in the interior of the reactor housing 20, in order to release heat generated in the reactor 23 to the outside more efficiently, the reactor housing 20 has excellent thermal conductivity or excellent heat dissipation performance. The material is filled.

  For example, the reactor housing 20 is filled with a liquid material formed of a material having excellent heat dissipation performance or a material having excellent thermal conductivity, and then the liquid material is solidified. Can do. That is, a substance for heat dissipation is enclosed in the reactor housing 20.

  According to such a structure, the heat generated in the reactor 23 can be transmitted to the reactor housing 20 more efficiently, and the heat transmitted to the reactor housing 20 can be released to the outside.

  FIG. 4 is an exploded perspective view of the power converter according to the present embodiment, and FIG. 5 is an exploded perspective view of the reactor housing according to the present embodiment.

  Referring to FIGS. 4 and 5, the power conversion apparatus 1 according to the present embodiment may include a housing 10 formed by coupling a front case 11 and a rear case 12. The power conversion device 1 may include a reactor housing 20 formed by coupling the basket 21 and the basket cover 22. The housing 10 and the reactor housing 20 are connected to each other by a connecting portion 30.

  A circuit board 13 can be disposed inside the housing 10. Then, power conversion elements 131 and 132 can be mounted on the circuit board 13. The power conversion elements 131 and 132 and the circuit board 13 are electrically connected to each other. The circuit board 13 can be fixed to the front case 11 or the rear case 12. In this embodiment, the circuit board 13 is described as being fixed to the rear case 12.

  A reactor 23 can be disposed inside the reactor housing 20. The reactor 23 can be fixed to the basket 21 or the basket cover 22. In the present embodiment, the reactor 23 will be described as being fixed to the basket 21.

  In detail, the reactor housing 20 can accommodate the reactor 23. The reactor housing 20 can be disposed separately from the rear case 12. The reactor housing 20 may include a basket 21 that forms a body and a basket cover 22 that shields the basket 21. The reactor 23 is covered by the basket cover 22 while being accommodated in the basket 21.

  The basket cover 22 can shield the opened surface of the basket 21. Further, the basket cover 22 can be provided as a door system that is connected to one side of the basket 21 and rotates. However, it is not limited to such an idea.

  The circuit board 13 and the power conversion elements 131 and 132 and the reactor 23 are electrically connected to each other. For this purpose, the reactor 23 and the circuit board 13 are connected to each other by an electric wire 24. The electric wire 24 is connected through the housing 10 and the reactor housing 20.

  That is, the housing 10 and the reactor housing 20 may be formed with a first through hole 125 and a second through hole 211 through which the electric wire 24 can pass. The first through hole 125 is provided in the housing 10. The second through hole 211 is provided in the reactor housing 20.

  The first through hole 125 and the second through hole 211 are provided in directions opposite to each other. The first through hole 125 and the second through hole 211 may be formed in various shapes such as a circle and a polygon. However, in the present embodiment, the first through hole 125 and the second through hole 211 are illustrated as provided as a polygon.

  The connection part 30 is provided on the rear case 12. The reactor housing 20 is fixed to the connecting portion 30.

  In detail, the connecting part 30 may be formed so as to protrude rearward from the rear surface of the rear case 12. The connecting part 30 may be formed so as to surround at least a part of the reactor housing 20. In addition, the connecting portion 30 can be disposed so that the rear case 12 and the reactor housing 20 are spaced apart at a constant interval.

  For example, the connecting part 30 may be formed so as to surround a corner portion of the reactor housing 20 formed in a polygon. The connecting portion 30 is provided with a separation portion 301 that separates the reactor housing 20 and the rear case 12 from each other at a constant interval.

  That is, the reactor housing 20 is inserted into the connecting portion 30 with the corners surrounded by the connecting portion 30. When the reactor housing 20 is inserted into the connecting portion 30, one surface of the reactor housing 20 comes into contact with the separation portion 301. When one surface of the reactor housing 20 comes into contact with the separation portion 301, the rear case 12 and the reactor housing 20 are fixed to the connecting portion 30 in a state of being separated by the separation portion 301.

  On the other hand, the connecting portion 30 is not provided so as to surround the reactor housing 20, but can be provided as a pipe shape that connects the housing 10 and the reactor housing 20. In such a case, the first through hole 125 and the second through hole 211 provided in the housing 10 and the reactor housing 20 are provided on the connection part 30. Further, the connecting part 30 can be fixedly coupled to the housing 10 and the reactor housing 20 by welding or the like.

  Although not limited to such an idea, in the present embodiment, the connecting portion 30 is provided so as to surround the reactor housing 20 so that the reactor housing 20 can be separated from the connecting portion 30. .

  6 is a cross-sectional view of the BB region in FIG.

  Referring to FIG. 6, the circuit board 13 and the power conversion elements 131 and 132 disposed in the housing 10 and the reactor 23 disposed in the reactor housing 20 are electrically connected to each other by the electric wires 24. Connected. A first through hole 125 through which the electric wire 24 can pass can be formed in the housing 10. Further, the reactor housing 20 may be formed with a second through hole 211 through which the electric wire 24 can pass.

  In order to prevent water droplets or the like from penetrating into the first through hole 125 and the second through hole 211 in a state where the electric wire 24 is disposed in the first through hole 125 and the second through hole 211. The seal portion can be included. The seal portion is provided in a space between the electric wire 24 and the first through hole 125. The seal portion is provided in a space between the electric wire 24 and the second through hole 211. The seal portion can be provided as a material having a waterproof function such as a rubber material or silicon.

  Meanwhile, in the present embodiment, the positions of the first through hole 125 and the second through hole 211 are illustrated as being formed at positions substantially corresponding to the center of the reactor housing 20. This is to provide the length of the electric wire 24 connecting the first through hole 125 and the second through hole 211 as the shortest distance.

  In contrast, the first through hole 125 and the second through hole 211 may be disposed adjacent to the connection part 30. In detail, the first through hole 125 and the second through hole 211 may be disposed inside the connecting portion 30 that is partially bent to surround the reactor housing 20. When the first through hole 125 and the second through hole 211 are disposed on the inner side of the connection part 30, water drops or the like falling in a direction from the upper part to the lower part of the power conversion device 1 are caused by the connection part 30. It is possible to prevent penetration into the first through hole 125 and the second through hole 211.

  That is, the connecting part 30 may serve as a roof that prevents water droplets or the like from penetrating above the first through hole 125 and the second through hole 211.

  If the housing 10 and the reactor housing 20 are fixed by the connecting portion 30, the housing 10 and the reactor housing 20 are separated at a constant interval by the separation portion 301. At this time, a space formed between the housing 10 and the reactor housing 20 can be referred to as a heat insulating space S.

  In the heat insulation space S, air can be disposed as a space disposed between the housing 10 and the reactor housing 20. Heat generated in the reactor housing 20 due to the air between the housing 10 and the reactor housing 20 can be prevented from being transmitted to the housing 10. Further, heat generated in the housing 10 can be prevented from being transmitted to the reactor housing 20.

  That is, by forming the heat insulation space S between the housing 10 and the reactor housing 20, it is possible to suppress the temperature rise of the housing 10 and the reactor housing 20.

Claims (12)

A first housing formed to have an internal space by coupling the front case and the rear case;
A second housing disposed apart from the first housing and having an accommodating space therein;
A connecting portion that is disposed between the first housing and the second housing and connects the first housing and the second housing;
A heat insulating space formed between the first housing and the second housing and preventing heat generated in each of the first housing and the second housing from being transmitted to each other;
Including a power conversion device. A printed circuit board and a power conversion element are disposed inside the first housing.
The power converter according to claim 1, wherein a reactor is disposed inside the second housing. An electric wire for electrically connecting the printed circuit board and the power conversion element and the reactor;
The power converter according to claim 2, wherein each of the first housing and the second housing is provided with a first through hole and a second through hole through which the electric wire passes.   The power converter according to claim 3, wherein the first through hole and the second through hole are arranged to face each other.   4. The electric power according to claim 3, wherein the connection part is formed so that at least a part thereof is bent, and the first through hole and the second through hole are disposed inside a bent part of the connection part. Conversion device.   4. The electric power according to claim 3, wherein a seal portion that seals the first through hole and the second through hole is provided in a state where the electric wire is disposed in the first through hole and the second through hole. Conversion device.   The power conversion device according to claim 2, wherein the power conversion element contacts the inside of the rear case.   The power converter according to claim 7, wherein a heat radiating fin for releasing heat generated by the power conversion element to the outside is provided outside the rear case.   The power conversion apparatus according to claim 1, wherein the connection portion is formed to extend from the first housing and surround at least a part of the second housing. The second housing is inserted and attached to the connecting portion,
The power conversion device according to claim 9, wherein the connection part includes a separation part that separates the first housing and the second housing from each other at a constant interval.   The power conversion device according to claim 2, wherein the second housing forms a body and includes a basket having at least one surface opened and a basket cover that shields the opened surface of the basket. A first housing forming a body and having an internal space;
A first power component housed in the internal space;
A second power component electrically connected to the first power component;
A second housing spaced apart from the first housing and having an accommodating space for accommodating the second power component;
A connecting portion for connecting the first housing and the second housing;
A heat insulating space located between the first housing and the second housing and formed by external air;
Including a power conversion device.