Capacitor device

Abstract

A capacitor device, according to a disclosed embodiment of the present invention, comprises: at least one unit capacitor unit; a pair of busbar units arranged on at least one side of the at least one unit capacitor unit; a case having an accommodation space that accommodates the at least one unit capacitor unit and at least a portion of the pair of busbar units; and an electrically insulating material unit that fills the remaining accommodation space except for the portion of the pair of busbar units after the number of unit capacitor units corresponding to the electric capacity requirement of a user are arranged in parallel or in series in the accommodation space of the case. Therefore, the versatility and replaceability of products can be improved.

Description

capacitor device

[0001] The present invention relates to a capacitor apparatus, and more particularly, to a capacitor apparatus capable of implementing an electric capacity that meets a user's needs by arranging at least one unit capacitor unit between a pair of busbar units and having smooth heat dissipation.

[0002] In the case of Korea, which relies on imports for more than 97% of its total energy, the average annual energy consumption growth rate is reaching 1.1%, and in particular, due to the realistic dependence on fossil fuels for 83% of its total energy sources, industrial competitiveness is weakening, running counter to international climate change agreements, such as strengthening greenhouse gas emission regulations.

[0003] Accordingly, eco-friendly electric vehicles and smart grids that can comply with these environmental regulations and energy policies are attracting attention, and the need for the development and widespread distribution of new energy storage devices to operate them is becoming increasingly urgent.

[0004] Nickel-metal hydride secondary batteries and lithium secondary batteries are the most widely used energy storage devices today. However, these secondary batteries require replacement every 2 to 3 years due to voltage drops during high-power discharges and a short lifespan when used repeatedly.

[0005] In addition, the secondary batteries mentioned above cannot charge a large amount of energy in a short period of time, and must be controlled from current source charging to voltage source charging by a charging algorithm. In addition, when discharging energy, a shallow discharge of about 20% is required to extend the lifespan, while a deep discharge of more than 80% shortens the lifespan. Therefore, these secondary batteries have a short life cycle, and they must always be managed for long-term use. In particular, they have the disadvantage of energy usage efficiency in that they cannot use 100% of the charged energy, and the problem of pollutant emissions always exists.

[0006] Accordingly, capacitors have recently been receiving considerable attention. Here, a capacitor refers to a storage battery capable of storing electricity. Among these capacitors, supercapacitors, in particular, are capacitors with extremely large storage capacity and are referred to as ultracapacitors or ultra-high-capacity capacitors.

[0007] A capacitor, a type of energy storage device, typically consists of a dielectric interposed between two parallel plates. The capacitor can charge and store energy through the electrical charge. The energy stored in the capacitor can be released when the polarization is resolved, thereby supplying electrical energy to electronic devices containing the capacitor.

[0008] Meanwhile, the energy a capacitor can store can be affected by its capacitance (C). For example, the greater the capacitance, the more energy can be stored for the same potential difference.

[0009] When using conventional film capacitors, film capacitors are arranged in a parallel structure to ensure that the overall electric capacity is the electric capacity desired by the user, or capacitor sheets are wound to obtain the desired value.

[0010] However, after manufacturing a capacitor device with a desired electric capacity by winding such a capacitor sheet, there was the inconvenience of having to unwind the wound sheet or manufacture a new one to manufacture a capacitor device with a different electric capacity. In addition, since the terminals protruding externally are manufactured as thin pins, there is a heating phenomenon depending on the current capacity.

[0011] Therefore, there is a need for the development of a capacitor device that can easily control electric capacity and has excellent heat dissipation performance.

[0012] To solve the above-mentioned problem, the disclosed embodiment of the present invention provides a capacitor device in which a unit capacitor unit is coupled to a pair of busbar units to have a desired electric capacitance by a user.

[0013] In addition, the disclosed embodiment of the present invention provides a capacitor device in which an insulating material is inserted to secure a withstand voltage characteristic and in which current capacity, heat generation characteristic, and ESR characteristic are improved compared to the existing structure.

[0014] In addition, the disclosed embodiment of the present invention provides a capacitor device that can secure lifespan and safety by easily discharging heat transmitted through epoxy resin to the outside by having a cooling jacket having a water-cooling structure.

[0015] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0016] In order to solve the above-described problem, a capacitor device according to a disclosed embodiment of the present invention includes at least one unit capacitor unit, a pair of busbar units arranged on at least one side of the at least one unit capacitor unit, a case having an accommodation space for accommodating the at least one unit capacitor unit and at least a portion of the pair of busbar units, and an electrically insulating material portion that fills the accommodation space remaining except for a portion of the pair of busbar units after the unit capacitor units are arranged in parallel or in series in a number corresponding to a user's required electric capacity in the accommodation space of the case.

[0017] Here, the unit capacitor unit may include a capacitor body having a predetermined electric capacity and a pair of capacitor terminals that protrude a predetermined length on both sides of the capacitor body and are electrically connected to each of the pair of bus bar units.

[0018] In addition, the pair of capacitor terminals includes a first capacitor terminal formed to protrude a predetermined length from one side of the capacitor body, and a second capacitor terminal formed to protrude a predetermined length from the other side of the capacitor body and formed opposite the first capacitor terminal based on the capacitor body, and the first capacitor terminal may form an electrical connection with a first busbar unit, which is one of the pair of busbar units, and the second capacitor terminal may form an electrical connection with a second busbar unit, which is the other of the pair of busbar units.

[0019] In addition, the pair of busbar units may include a busbar unit body that receives the capacitor terminal and forms an electrical connection with the at least one unit capacitor unit, and a plurality of busbar unit terminals that protrude in one direction from one side of the busbar unit body and are exposed from the electrically insulating material portion of the receiving space of the case.

[0020] Additionally, a terminal gap having a constant width can be formed between the plurality of bus bar unit terminals.

[0021] In addition, the busbar unit body has a shape corresponding to the capacitor terminal and includes at least one capacitor terminal receiving hole formed in a plane direction, and the at least one capacitor terminal receiving hole can be arranged to have at least one row and at least one column in the busbar unit body.

[0022] In addition, the at least one capacitor terminal receiving hole may be provided with a terminal hole opening / closing cover that is configured to open the capacitor terminal receiving hole when the capacitor terminal is inserted and close the capacitor terminal receiving hole when the capacitor terminal is removed.

[0023] Additionally, the terminal hole opening / closing cover can be connected to the capacitor terminal receiving hole by a connecting wire so as not to be separated from the pair of bus bar units.

[0024] In addition, the case may further include a cooling unit arranged in the receiving space for cooling at least one unit capacitor unit.

[0025] Additionally, the cooling unit can be filled and protected from the outside by the electrically insulating material portion.

[0026] In addition, the cooling unit includes a cooling water jacket disposed on one side of the receiving space of the case, in which cooling water is stored, and a cooling water circulation tube connected to the cooling water jacket and disposed to surround the outer surface of at least one unit capacitor unit, and the cooling water jacket and the cooling water circulation tube may be made of a thermally conductive material.

[0027] Additionally, it may further include an insulating sheet disposed between the at least one unit capacitor unit and each of the pair of busbar units.

[0028] According to the proposed embodiment, the capacitor device according to the disclosed embodiment of the present invention has a structure capable of connecting unit capacitor units in series and / or in parallel, thereby having the advantage of allowing a user to easily configure a capacitor device having a desired electric capacity.

[0029] In addition, since the busbar unit body of a pair of busbar units has an area smaller than or equal to the area of ​​the inner surface of the case, there is an advantage in that the unit capacitor unit and the busbar unit body can be stably accommodated in the inner accommodation space of the case.

[0030] Additionally, the internal storage space of the case is molded with epoxy material, a type of electrically insulating material, so the unit capacitor unit and a pair of busbar units are safely protected from the external environment.

[0031] In addition, since multiple busbar unit terminals of a pair of busbar units apply busbar-shaped terminals, there is an advantage in that insertion and soldering to a substrate become easy.

[0032] Additionally, since a terminal gap is formed between the terminals of a plurality of busbar units, there is an advantage in that a pair of busbar units can be easily inserted and soldered to a substrate.

[0033] In addition, since at least one capacitor terminal receiving hole of a pair of busbar units is arranged to have at least one row and at least one column, there is an advantage in that a busbar unit structure suitable for the size of the capacitor device and the case can be applied.

[0034] In addition, there is an advantage in that the withstand voltage characteristics can be secured by inserting an insulating sheet between at least one unit capacitor unit and each of a pair of busbar units.

[0035] In addition, the capacitor device according to the disclosed embodiment of the present invention has the advantage of improved current capacity, heat generation characteristics, and ESR characteristics compared to the existing structure.

[0036] FIG. 1 is a perspective view of a capacitor device according to a disclosed embodiment of the present invention.

[0037] FIG. 2 is a perspective view of a capacitor device according to a disclosed embodiment of the present invention viewed from another angle.

[0038] FIG. 3 is a diagram illustrating the combined form and configuration of components accommodated in a case accommodation space by removing the case configuration from a capacitor device according to a disclosed embodiment of the present invention.

[0039] FIG. 4 is another drawing for explaining the combination form and configuration of components accommodated in the accommodation space of the case by removing the case configuration from the capacitor device according to the disclosed embodiment of the present invention.

[0040] FIG. 5 illustrates a terminal hole opening / closing cover, which is one component of a capacitor device according to a disclosed embodiment of the present invention.

[0041] FIGS. 6A and 6B are perspective and front views showing a cooling unit, which is one component of a capacitor device according to a disclosed embodiment of the present invention.

[0042] FIG. 7 illustrates one side of a pair of busbar units, which are one component of a capacitor device according to a disclosed embodiment of the present invention.

[0043] FIG. 8 is a diagram illustrating various embodiments of a pair of busbar units, which are one component of a capacitor device according to a disclosed embodiment of the present invention.

[0044] [Explanation of symbols]

[0045] 1: Capacitor device 100: Unit capacitor unit

[0046] 200: Busbar unit 300: Case

[0047] 400: Insulating paper 500: Electrical insulating material

[0048] 600: Cooling unit 610: Coolant jacket

[0049] 620: Coolant circulation tube

[0050] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided solely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined solely by the scope of the claims.

[0051] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it should be understood that the "first" component referred to below may also be a "second" component within the technical scope of the present invention.

[0052] Identical reference numerals throughout the specification refer to identical components.

[0053] The individual features of the various embodiments of the present invention can be partially or wholly combined or combined with each other, and as can be fully understood by those skilled in the art, various technical connections and operations are possible, and each embodiment can be implemented independently of each other or can be implemented together in a related relationship.

[0054] Meanwhile, the tentative effects that can be expected by the technical features of the present invention that are not specifically mentioned in the specification of the present invention are treated as described in the specification, and the present embodiment is provided to more completely explain the present invention to a person having average knowledge in the art, and the contents shown in the drawings may be expressed exaggeratedly compared to the actual implementation of the invention, and a detailed description of a configuration that is judged to unnecessarily obscure the gist of the present invention is omitted or briefly described.

[0055]

[0056] Hereinafter, the disclosed embodiments of the present invention will be described in detail with reference to the attached drawings.

[0057] FIG. 1 is a perspective view of a capacitor device (1) according to a disclosed embodiment of the present invention, and FIG. 2 is a perspective view of the capacitor device (1) according to a disclosed embodiment of the present invention viewed from a different angle.

[0058] Referring to FIGS. 1 and 2, a capacitor device (1) according to the disclosed embodiment of the present invention includes at least one unit capacitor unit (100), a pair of busbar units (200), and a case (300).

[0059] In FIGS. 1 and 2 of the present invention, components accommodated inside the case (300) by the epoxy resin molding, which is the insulation material portion (500) described later, are not expressed in detail, but it should be understood that at least one unit capacitor unit (100), which is a component of the capacitor device (1) according to the disclosed embodiment of the present invention, is arranged inside the case (300).

[0060] At least one unit capacitor unit (100) may be configured to have a predetermined electric capacity. For example, the unit capacitor unit (100) may have various electric capacitances such as 1 pF, 10 pF, 100 pF, and 1 μF. The unit capacitor unit (100) may be a unit configuration for enabling the capacitor device (1) according to the disclosed embodiment of the present invention to have a large electric capacity.

[0061] A pair of busbar units (200) may be arranged on at least one side of at least one unit capacitor unit (100). For example, one of the pair of busbar units (200) may be arranged on one side of at least one unit capacitor unit (100), and the other of the pair of busbar units (200) may be arranged on the other side of at least one unit capacitor unit (100).

[0062] The case (300) forms a receiving space therein and can accommodate other components in the receiving space. For example, the case (300) can accommodate at least one unit capacitor unit (100), a cooling unit (600) described below, and at least a portion of a pair of busbar units (200).

[0063] The case (300) can be formed of a hard material, thereby safely protecting the unit capacitor unit (100) and a pair of busbar units (200) placed inside the case (300) from external impact.

[0064] Meanwhile, referring to FIG. 2, at least all of one unit capacitor unit (100) and at least a portion of one pair of bus bar units (200) can be accommodated in the accommodation space of the case (300). At this time, the accommodation space of the case (300) can be filled and formed with an epoxy resin molding material, which is an electrically insulating material portion (500).

[0065] For example, after a unit capacitor unit (100) and a portion of a pair of busbar units (200) are accommodated in the internal receiving space of the case (300), an epoxy material, which is a type of electrically insulating material (500), may be filled in the receiving space. Thereafter, when the electrically insulating material solidifies, at least one unit capacitor unit (100) and at least a portion of a pair of busbar units (200) disposed within the receiving space of the case (300) may be safely protected from the external environment.

[0066] Below, the detailed configuration of each part is explained in more detail.

[0067] FIG. 3 is a drawing for explaining the combination form and configuration of components accommodated in the accommodation space of the case (300) by removing the case (300) configuration from the capacitor device (1) according to the disclosed embodiment of the present invention, and FIG. 4 is another drawing for explaining the combination form and configuration of components accommodated in the accommodation space of the case (300) by removing the case (300) configuration from the capacitor device (1) according to the disclosed embodiment of the present invention.

[0068] Referring to FIGS. 1 to 4, at least one unit capacitor unit (100), which is a component of a capacitor device (1) according to the disclosed embodiment of the present invention, may include a capacitor body (101) and a pair of capacitor terminals (102).

[0069] For example, the capacitor body (101) may include a dielectric material (dielectric) disposed between facing metal plates and facing metal plates inside the capacitor body (101). The capacitor body (101) may have a predetermined electric capacity (C) depending on the properties of the dielectric material, etc.

[0070] Additionally, a pair of capacitor terminals (102) may be formed to protrude a predetermined length on both sides of the capacitor body (101). Additionally, a pair of capacitor terminals (102) may be electrically connected to each of a pair of bus bar units (200).

[0071] Accordingly, a pair of busbar units (200) can be connected in series or parallel with at least one unit capacitor unit (100), such that each unit capacitor unit (100) can store or release energy.

[0072] More specifically, a pair of capacitor terminals (102) may include a first capacitor terminal (102a) and a second capacitor terminal (102b).

[0073] The first capacitor terminal (102a) may be formed to protrude a predetermined length from one side of the capacitor body (101). In addition, the second capacitor terminal (102b) may be formed to protrude a predetermined length from the other side of the capacitor body (101) and may be formed to face the first capacitor terminal (102a) with respect to the capacitor body (101). That is, the first capacitor terminal (102a) and the second capacitor terminal (102b) may have the same length.

[0074] A pair of capacitor terminals (102) and a pair of busbar units (200) may be coupled to each other to form an electrical connection. For example, a first capacitor terminal (102a) may form an electrical connection with a first busbar unit (210) of one of the pair of busbar units (200), and a second capacitor terminal (102b) may form an electrical connection with a second busbar unit (220) of the other of the pair of busbar units (200).

[0075] Here, the length of the first capacitor terminal (102a) and the second capacitor terminal (102b) can be formed to a degree that a portion thereof protrudes to the outside by a predetermined length through at least one pair of bus bar units (200).

[0076] More specifically, the first capacitor terminal (102a) and the second capacitor terminal (102b) can be stably fixed by an electrically insulating material portion (500) that protrudes outwardly after penetrating through capacitor terminal receiving holes (202) formed in the bus bar unit bodies (201, 202) of a pair of bus bar units (200) described later, and then filling the receiving space of the case (300).

[0077] A pair of busbar units (200) can be inserted and installed into a substrate (e.g., a PCB substrate, not shown in the attached drawings of the present invention) and energized.

[0078] More specifically, among a pair of busbar units (200), a plurality of busbar unit terminals (203) described later are formed to be exposed to the outside from the receiving space of the case (300), and the plurality of busbar unit terminals (203) can be inserted into solder holes formed in the substrate in an insertion manner and then soldered together.

[0079] FIG. 5 illustrates a terminal hole opening / closing cover (230), which is one component of a capacitor device (1) according to a disclosed embodiment of the present invention.

[0080] Referring to FIGS. 1 to 5, a pair of busbar units (200), which are one component of a capacitor device (1) according to the disclosed embodiment of the present invention, may include a busbar unit body (201).

[0081] The busbar unit body (201) can accommodate a capacitor terminal (102) to form an electrical connection with at least one unit capacitor unit (100).

[0082] The busbar unit body (201) may have a thin plate shape with a rectangular cross-section, but is not necessarily limited to this shape. For example, the busbar unit body (201) may have a shape corresponding to the shape of the inner surface of the internal receiving space of the case (300) and may be formed to have an area less than or equal to the area of ​​the inner surface. Accordingly, the busbar unit body (201) may be stably received in the internal receiving space of the case (300) and may be insulated from other components by the epoxy resin molding material, which is the electrically insulating material portion (500).

[0083] Additionally, a pair of busbar units (200) may include a plurality of busbar unit terminals (203). The plurality of busbar unit terminals (203) may be formed to protrude in one direction (e.g., in the negative z-axis direction) from one side of the busbar unit body (201).

[0084] A plurality of bus bar unit terminals (203) may be formed to be exposed from the receiving space of the case (300) for insertion into a substrate. Preferably, a portion of the plurality of bus bar unit terminals (203) may be formed to be exposed to the outside by an electrically insulating material portion (500) filled in the receiving space of the case (300).

[0085] Conventional capacitor devices use cylindrical terminals of φ0.7 to φ1, but the capacitor device (1) according to the disclosed embodiment of the present invention applies a busbar-shaped terminal, thereby enabling smooth insertion and soldering to be performed on a substrate.

[0086] Additionally, a terminal gap (204) having a constant width may be formed between the plurality of busbar unit terminals (203). The terminal gap (204) may have a width equal to or smaller than the width of each of the plurality of busbar unit terminals (203).

[0087] In this way, by forming a terminal gap (204) between a plurality of busbar unit terminals (203), there is an advantage in that a pair of busbar units (200) can be smoothly inserted and soldered to a substrate.

[0088] Meanwhile, the busbar unit body (201) may include at least one capacitor terminal receiving hole (202).

[0089] More specifically, at least one capacitor terminal receiving hole (202) may have a cross-sectional shape corresponding to the capacitor terminal (102).

[0090] That is, at least one capacitor terminal receiving hole (202) has a shape corresponding to the capacitor terminal (102), thereby being able to receive the capacitor terminal (102).

[0091] By inserting and connecting the capacitor terminal (102) into the capacitor terminal receiving hole (202), the unit capacitor units (100) can form a series or parallel connection structure, and the user can obtain a desired electric capacity through the connection structure of the unit capacitor units (100).

[0092] For example, the user can check the number of unit capacitor units (100) to be installed according to the required electric capacity, and then set the serial or parallel connection structure of the capacitor terminal receiving holes (202) to install the desired number of unit capacitor units (100), thereby obtaining the desired electric capacity.

[0093] However, after the unit capacitor unit (100) is installed in the receiving space of the case (300) in a quantity according to the user's required electric capacity and the electrical insulating material portion (500) is filled, the capacitor terminal receiving hole (202) that is not involved in the installation of the unit capacitor unit (100) is filled with an epoxy resin molding material.

[0094] If the epoxy resin molding material fills the capacitor terminal receiving hole (202), a problem may arise in which the electrically insulating material portion (500) must be removed separately when adding a unit capacitor unit (100) due to a later replacement or change in the design of the electric capacity.

[0095] As a solution to this problem, at least one capacitor terminal receiving hole (202) may further be provided with a terminal hole opening / closing cover (230) that is configured to open the capacitor terminal receiving hole (202) when the capacitor terminal (102) is inserted and close the capacitor terminal receiving hole (202) when the capacitor terminal (102) is removed.

[0096] The terminal hole opening cover (230) can be connected to the capacitor terminal receiving hole (202) by a connection wire (231) so as not to be separated from a pair of bus bar units (201).

[0097] FIG. 6a and FIG. 6b are perspective views and front views showing a cooling unit (600), which is one component of a capacitor device (1) according to a disclosed embodiment of the present invention.

[0098] The capacitor device (1) according to the disclosed embodiment of the present invention may further include a cooling unit (600) that is arranged in the receiving space of the case (300) and cools at least one unit capacitor unit (100), as shown in FIGS. 6a and 6b.

[0099] The cooling unit (600) is configured to efficiently dissipate heat generated from the unit capacitor units (100) installed in series or parallel inside the case (300).

[0100] Here, the cooling unit (600) can be protected from the outside by being filled with an electrically insulating material portion (500) that is filled in the receiving space of the case (300).

[0101] A cooling unit (600) of this type may include a cooling water jacket (610) disposed on one side of the receiving space of the case (300) and storing cooling water therein, and a cooling water circulation tube (620) connected to the cooling water jacket (610) and disposed to surround the outer surface of at least one unit capacitor unit (100).

[0102] Here, the cooling water jacket (610) and the cooling water circulation tube (620) are preferably made of a thermally conductive material, and may be made of a metal material such as aluminum or copper, for example.

[0103] The coolant jacket (610) can transmit a flow force that enables the coolant to circulate at least through the coolant circulation tube (620). Although not shown in the drawing, the coolant jacket (610) can generate the above-described flow force through a separate coolant circulation device.

[0104] Here, the cooling water jacket (610) can be temporarily fixed to the receiving space of the case (300) and then stably fixed by filling the electrical insulating material portion (500).

[0105] For temporary fixing of the cooling water jacket (610) to the receiving space of the case (300), a jacket fixing member (240) may be integrally formed on the inner side of a pair of bus bar units (201).

[0106] The jacket fixing member (240) is formed to protrude toward the cooling water jacket (610) by penetrating the insulating paper (400) described later, and at least four of them can be placed at the corner end portions of the cooling water jacket (610) to support each end of the cooling water jacket (610) formed in a roughly thin rectangular shape.

[0107] Meanwhile, the cooling water circulation tube (620) may be arranged so as to pass through the outer side of the unit capacitor units (100) arranged in series or parallel in the receiving space of the case (300) or between each unit capacitor unit (100), while being connected at one end to the cooling water jacket (610).

[0108] FIG. 7 illustrates one side of a pair of busbar units (200) which are one component of a capacitor device (1) according to a disclosed embodiment of the present invention, and FIG. 8 is for explaining various embodiments of a pair of busbar units (200) which are one component of a capacitor device (1) according to a disclosed embodiment of the present invention.

[0109] Referring to FIGS. 1 to 8, a pair of busbar units (200) can have various shapes.

[0110] For example, the busbar unit (200b) according to the first modified example illustrated in (a) of FIG. 8 may have a busbar unit body (201') formed to be relatively taller than the busbar unit (200) illustrated in FIG. 5, and may have capacitor terminal receiving holes (202) of 3 rows and 4 columns.

[0111] As another example, the busbar unit (200c) according to the second modified example illustrated in (b) of FIG. 8 may have a busbar unit body (201”) formed to have a relatively lower height compared to the busbar unit (200) illustrated in FIG. 5, and may have capacitor terminal receiving holes (202) in one row and four columns.

[0112] That is, in a pair of busbar units (200), at least one capacitor terminal receiving hole (202) can be arranged to have at least one row and at least one column in the busbar unit body (201). Depending on the size of the case (300), a busbar unit (200) of an appropriate shape can be applied, and thus a series and / or parallel connection structure of at least one unit capacitor unit (100) can be implemented.

[0113] The description of the pair of busbar units (200) described above can be commonly applied to the first busbar unit (210) and the second busbar unit (220).

[0114] The detailed components of the busbar unit (200), such as the busbar unit body, capacitor terminal receiving hole, multiple busbar unit terminals, and terminal gap, may be referred to as drawing reference numerals 211, 212, 213, and 214, respectively, in the first busbar unit (210), and may be referred to as drawing reference numerals 221, 222, 223, and 224, respectively, in the second busbar unit (220).

[0115] In addition, the capacitor device (1) according to the disclosed embodiment of the present invention may further include an insulating sheet (400), as referenced in FIGS. 3 to 6b. The insulating sheet (400) may be placed between at least one unit capacitor unit (100) and each of a pair of busbar units (200).

[0116] The insulating paper (400) may include a first insulating paper (410) placed between the first busbar unit (210) and the unit capacitor unit (100), and a second insulating paper (420) placed between the second busbar unit (220) and the unit capacitor unit (100).

[0117] Such an insulating paper (400) can prevent the capacitor body (101) from directly contacting one surface of a pair of bus bar units (200). By inserting the insulating paper (400) between the unit capacitor unit (100) and the pair of bus bar units (200), the withstand voltage characteristics of the capacitor device (1) according to the disclosed embodiment of the present invention can be secured.

[0118] According to the proposed embodiment, the capacitor device (1) according to the disclosed embodiment of the present invention has a structure capable of connecting unit capacitor units (100) in series and / or parallel, thereby having the advantage of allowing a user to easily configure a capacitor device (1) having a desired electric capacity.

[0119] In addition, since the busbar unit body (201) of a pair of busbar units (200) has an area smaller than or equal to the area of ​​the inner surface of the case (300), there is an advantage in that the unit capacitor unit (100) and the busbar unit body (201) can be stably accommodated in the inner accommodation space of the case (300).

[0120] In addition, the internal storage space of the case (300) is molded with an epoxy resin material as an electrically insulating material portion (500), so that the unit capacitor unit (100) and a pair of busbar units (200) are safely protected from the external environment.

[0121] Furthermore, since the plurality of busbar unit terminals (203) of a pair of busbar units (200) are applied with busbar-shaped terminals, there is an advantage in that insertion and soldering to the substrate become easy.

[0122] In addition, since a terminal gap (204) is formed between a plurality of busbar unit terminals (203), there is an advantage in that a pair of busbar units (200) can be easily inserted and soldered to a substrate.

[0123] In addition, since at least one capacitor terminal receiving hole (202) of a pair of busbar units (200) is arranged to have at least one row and at least one column, there is an advantage in that a busbar unit structure suitable for the size of the capacitor device (1) and the case (300) can be applied.

[0124] In addition, there is an advantage in that an insulating paper (400) is inserted and placed between at least one unit capacitor unit (100) and each of a pair of bus bar units (200), thereby securing a withstand voltage characteristic.

[0125] Lastly, the capacitor device (1) according to the disclosed embodiment of the present invention has the advantage of improved current capacity, heat generation characteristics, and ESR characteristics compared to the existing structure.

[0126]

[0127] Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the patent claims, the detailed description of the invention, and the attached drawings, and it is obvious that this also falls within the scope of the present invention.

[0128] The present invention provides a capacitor device in which a unit capacitor unit is coupled to a pair of busbar units to have an electric capacity desired by a user.

Claims

1. At least one unit capacitor unit; A pair of busbar units arranged on at least one side of the at least one unit capacitor unit; A case having a receiving space for accommodating at least one unit capacitor unit and at least a portion of the pair of busbar units; and A capacitor device characterized by including an electrically insulating material portion that fills the remaining accommodation space except for a portion of the pair of busbar units after the unit capacitor units are arranged in parallel or in series in a number corresponding to the electric capacity required by the user in the accommodation space of the case; 2. In claim 1, The above unit capacitor unit is, A capacitor body having a predetermined electric capacity; and A capacitor device characterized by including a pair of capacitor terminals formed to protrude a predetermined length on both sides of the capacitor body and electrically connected to each of the pair of bus bar units.

3. In claim 2, The above pair of capacitor terminals includes a first capacitor terminal formed to protrude a predetermined length from one side of the capacitor body, and a second capacitor terminal formed to protrude a predetermined length from the other side of the capacitor body and formed opposite the first capacitor terminal based on the capacitor body. A capacitor device, characterized in that the first capacitor terminal forms an electrical connection with a first busbar unit, which is one of the pair of busbar units, and the second capacitor terminal forms an electrical connection with a second busbar unit, which is the other of the pair of busbar units.

4. In claim 2, The above pair of busbar units, A busbar unit body that accommodates the capacitor terminal and forms an electrical connection with at least one unit capacitor unit; and A capacitor device characterized by including a plurality of busbar unit terminals that protrude in one direction from one side of the busbar unit body and are exposed from the electrically insulating material portion of the receiving space of the case.

5. In claim 4, A capacitor device characterized in that a terminal gap having a constant width is formed between the plurality of bus bar unit terminals.

6. In claim 4, The above busbar unit body has a shape corresponding to the capacitor terminal and includes at least one capacitor terminal receiving hole formed in a surface direction, A capacitor device, characterized in that the at least one capacitor terminal receiving hole is arranged in the busbar unit body to have at least one row and at least one column.

7. In claim 6, A capacitor device characterized in that at least one capacitor terminal receiving hole is provided with a terminal hole opening / closing cover that is configured to open the capacitor terminal receiving hole when the capacitor terminal is inserted and close the capacitor terminal receiving hole when the capacitor terminal is removed.

8. In claim 7, A capacitor device characterized in that the terminal hole opening / closing cover is connected to the capacitor terminal receiving hole by a connecting wire so as not to be separated from the pair of bus bar units.

9. In claim 1, A capacitor device characterized by further comprising a cooling unit arranged in the receiving space of the case and cooling at least one unit capacitor unit.

10. In claim 9, A capacitor device, characterized in that the cooling unit is filled and protected from the outside by the electrically insulating material portion.

11. In claim 9, The above cooling unit, A cooling water jacket arranged on one side of the receiving space of the above case and storing cooling water inside; and A cooling water circulation tube connected to the cooling water jacket and arranged to surround the outer surface of at least one unit capacitor unit; A capacitor device, characterized in that the above-mentioned cooling water jacket and cooling water circulation tube are made of a thermally conductive material.

12. In claim 1, A capacitor device further comprising: an insulating sheet disposed between at least one unit capacitor unit and each of the pair of bus bar units.

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