KR102669859B1 - high capacity fuse assembly for Energy Storage System - Google Patents

Abstract

The present invention relates to a high-capacity fuse assembly for ESS, comprising: a tube (10) made of a non-conducting material with a tube through-hole (11) formed therein; First and second brackets (20) and (30) coupled to both ends of the tube (10) and having first and second bracket holes (21 and 31) formed on the inside; A first terminal plate (42) fixed to the back of the first bracket (20) while being engaged with one side of the first rod terminal (41) penetrating the first bracket groove (21) and the tube through hole (11). ) and a first terminal portion 40 consisting of; A second terminal plate (52) fixed to the back of the second bracket (30) while being engaged with the second rod terminal (51) penetrating the second bracket groove (31) and the other side of the tube through hole (11). ) and a second terminal portion 50 consisting of; A plurality of elements 60 connected in parallel to the first terminal plate 42 and the second terminal plate 52 to be located inside the tube through hole 11 and thermally deformed and melted when more than the rated current is applied; It is characterized by including.

Description

High capacity fuse assembly for ESS {high capacity fuse assembly for Energy Storage System}

The present invention relates to a high-capacity fuse, and more specifically, to a high-capacity fuse for ESS that is connected to a circuit of an ESS (Energy Storage System) that stores high-capacity power and can quickly disconnect from the circuit in an abnormal situation to protect the ESS. It's about.

Recently, in order to reduce the greenhouse effect that causes climate disaster along with the problem of depletion of fossil fuels, new and renewable power generation methods using solar power or wind power are emerging as a trend instead of power generation methods using fossil fuels.

Solar power generation, a representative example of new and renewable power generation, can generate power only during the day when the sun is up, and wind power generation can only generate power when there is wind. Therefore, in the case of new and renewable power generation, a planned schedule is required compared to the existing power generation method. It is difficult to develop into

Accordingly, when using renewable power generation, ESS (Energy Storage System) is essentially applied to temporarily store the generated power so that it can be used when needed. It has a capacity of more than KW. This ESS includes multiple battery cells that store power, a circuit that inputs power to the battery cells or outputs stored power, and a high-capacity fuse to protect the circuit from complex factors such as lightning, overheating, overcurrent, and surge. do.

As a related technology for high-capacity fuses, a fuse made of a heat deformable material that melts and breaks in the heat generated by overcurrent has been developed, and the related prior art is titled "composite fuse for blocking overheating and overcurrent" in Domestic Registered Patent No. 10-1514956. It is disclosed as.

However, in the case of conventional fuses, when a current or voltage exceeding the rating is applied, current flows through the first and second lead terminals until the heat deformable material completely melts the solder ball, so the ESS circuit may be damaged in this process. There was this.

The present invention was created to solve the above problems, and provides a high-capacity fuse assembly for ESS that can protect the connected ESS circuit by quickly melting the element installed inside when a current or voltage exceeding the rating is applied. The purpose is to

In order to achieve the above object, a high-capacity fuse assembly for ESS according to the present invention includes a tube (10) made of a non-conducting material with a tube through-hole (11) formed therein; First and second brackets (20) (30) coupled to both ends of the tube (10) and having first and second bracket holes (21) (31) formed on the inside; A first rod terminal 41 penetrating the first bracket groove 21 and a first terminal fixed to the back of the first bracket 20 while being engaged with one side of the tube through hole 11. A first terminal portion 40 consisting of a plate 42; A second rod terminal 51 penetrating the second bracket groove 31 and a second terminal fixed to the back of the second bracket 30 while being engaged with the other side of the tube through hole 11. A second terminal portion 50 consisting of a plate 52; and a plurality of elements 60 that are connected in parallel to the first terminal plate 42 and the second terminal plate 52 to be located inside the tube through hole 11 and are thermally deformed and melted when more than the rated current is applied. ); characterized in that it includes.

In the present invention, the element 60 is composed of a plurality of unit wrinkles 61, 61', and 61" connected between the first terminal plate 42 and the second terminal plate 52. A pleated strap 62 and a hole line 63 formed on each of the unit wrinkles 61, 61', and 61" are formed with a plurality of holes 63a and 63b formed in the form of a line. ) includes.

In the present invention, the unit wrinkles 61 (61') (61") are formed to surround the hole line 63 and include a narrow band 61a made of an alloy of copper and silver, and the narrow band 61a ) is formed on both sides and includes conduction bands 61b made of copper.

In the present invention, it further includes insulating powder 70 filled in the tube through hole 11 between the first and second terminal plates 42 and 52.

In the present invention, the insulating powder 70 is. It is implemented by mixing silica sand powder and acrylic powder in a ratio of 1:1.

In the present invention, an indicator 80 installed on the tube 10 that indicates fuse burnout when the element 60 is blown out is further included.

In the present invention, the indicator 80 includes a main spring 81 installed inside the indicator hole 12 formed on the side of the tube 10, and the indicator 80 is elastically supported by the main spring 81. An operating protrusion 82 inserted into the indicator hole 12 is connected to the first and second terminal parts 40 and 50, and the operating protrusion 82 is constrained to be located inside the indicator hole 12. A confined heater 83, a cap 84 installed to cover the operating protrusion 82 on the outside of the tube 10, and the operating protrusion in a state inserted into the cap hole 84a formed in the cap 84. The main spring is installed on the inner side of the cap 84 and applies an elastic force so that the display protrusion 85 is in close contact with the operating protrusion 82. (81) and includes a subspring (86) with a smaller elastic modulus.

According to the present invention, first and second brackets (20) (30) and first and second terminal portions (40) (50) are installed at both ends of the tube (10) made of a non-conducting material, and the tube (10) penetrates the tube (10). A plurality of elements connected in parallel with the first and second terminal plates 42 and 52 of the first and second terminal portions 40 and 50 inside the hole 11 are thermally deformed and melted when more than the rated current is applied. By including (60), a high capacity fuse of 1000~1500V DC and 100KA or more can be implemented.

In addition, a plurality of elements 60 connected in parallel to the first and second terminal plates 42 and 52 include a pleated strap 62 composed of a plurality of unit pleats 61, 61', and 61". , each of the unit wrinkles 61, 61', and 61" includes a hole line 63 formed by forming a plurality of holes 63a and 63b in the form of a line, thereby generating a current greater than the rated current. And when voltage is applied, the element 60 quickly melts and blocks the ESS circuit, thereby preventing damage to the ESS.

And, by the indicator 80, the state in which the element 60 is blown can be accurately recognized from the outside, making it possible to accurately determine whether or not the fuse assembly should be replaced.

1 is a perspective view of a high-capacity fuse assembly for ESS according to the present invention;
Figure 2 is a cross-sectional view along line II-II;
Figure 3 is a side view showing an excerpt of the element of Figure 2;
Figure 4 is a front view illustrating a plurality of unit wrinkles formed in the element of Figure 3;
Figure 5 is a diagram for explaining that the unit wrinkle of Figure 4 includes a narrow band and a conduction band;
Figure 6 is a diagram for explaining the operation of the indicator of Figure 2;

Hereinafter, a high capacity fuse assembly for ESS according to the present invention will be described in detail with reference to the attached drawings.

Hereinafter, the term “above” or “above” may include not only what is directly above in contact but also what is above without contact. Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. Terms are used only to distinguish one component from another. Singular expressions include plural expressions unless the context clearly dictates otherwise. Additionally, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary. Additionally, terms such as "...unit" and "module" used in the specification refer to a unit that processes at least one function or operation.

Figure 1 is a perspective view of a high capacity fuse assembly for ESS according to the present invention, and Figure 2 is a cross-sectional view taken along line II-II.

As shown, the high-capacity fuse assembly for ESS according to the present invention includes a tube 10 made of a non-conducting material with a tube through-hole 11 formed therein; First and second brackets (20) and (30) coupled to both ends of the tube (10) and having first and second bracket holes (21 and 31) formed on the inside; A first terminal plate (41) passing through the first bracket groove (21) and a first terminal plate ( A first terminal portion 40 consisting of 42); A second terminal plate fixed to the back of the second bracket 30 while being engaged with the second rod terminal 51 penetrating the second bracket groove 31 and the other side of the tube through hole 11. A second terminal portion 50 consisting of (52); A plurality of devices connected in parallel to the first terminal plate 42 and the second terminal plate 52 to be located inside the tube through hole 11 and thermally deformed and melted when more than the rated current is applied, in this embodiment, 4 elements 60; Insulating powder 70 filled in the tube through hole 11 between the first and second terminal plates 42 and 52; It is characterized by including an indicator 80 that is installed on the tube 10 and indicates fuse burnout when the element 60 is blown.

The tube 10 is formed by forming a non-conducting ceramic into a hexahedral shape, and has a cylindrical tube through hole 11 penetrating in the horizontal direction and a tube through hole 11 that communicates with the tube hole 11 to form a vertical direction in the center. Includes an indicator hole (12).

The first bracket 20 is coupled to one end of the tube 10 with a bolt, and a rectangular first bracket hole 21 is formed on the inside.

The second bracket 30 is coupled to the other end of the tube 10 with a bolt, and a rectangular second bracket hole 31 is formed on the inside.

The first rod terminal 41 is formed with a first terminal groove 41a that is open on one side, and the second rod terminal 51 is formed with a second terminal groove 51a that is open in the longitudinal direction. These first and second load terminals 41 and 51 are connected to the terminals of the circuit that drives the ESS.

The first terminal plate 42 is shaped like a disk so that it can be engaged with one side of the tube through-hole 11, and the second terminal plate 52 is shaped like a disk so that it can be engaged with the other side of the tube through-hole 11. These first and second terminal plates (42) (52) are fixed to the first and second brackets (20) (30) while sandwiched between both ends of the tube through hole (11), and the first and second rod terminals (41) ) (51) is supported so as to protrude, and at the same time, the tube through hole (11) is maintained filled with insulating powder.

Figure 3 is a side view showing an excerpt of the element of Figure 2, Figure 4 is a front view illustrating a plurality of unit wrinkles formed in the element of Figure 3, and Figure 5 shows the unit wrinkles of Figure 4 including a narrow zone and a conduction band. This is a drawing to explain what to do.

The element 60 is a plurality of pleats connected between the first terminal plate 42 and the second terminal plate 52, and in this embodiment, seven unit pleats 61, 61', and 61". It is formed on the strap 62 and each of the unit wrinkles 61, 61', and 61", and includes a hole line 63 composed of a plurality of holes 63a and 63b formed in a line shape. do. The element 60 is implemented by processing a flat metal plate into a strip shape, and in this embodiment, the width ranges from 10 to 20 mm and the thickness ranges from 0.1 to 0.3 mm.

The pleated strap 62 can be stretched or shrunk because it is made up of a plurality of unit pleats 61, 61', and 61". Accordingly, the first and second terminal plates connected to both ends of the pleated strap 62 The gap between (42) and (52) can be increased or decreased to secure space for injecting the insulating powder (70) into the tube through hole (11).

Since the hole line 63 is made up of multiple holes 63a and 63b, it is narrower than other parts. Accordingly, when the rated voltage and current are applied to the element 60, it is melted due to thermal deformation and melting due to high temperature. Damage is prevented by separating the circuit connected to the fuse assembly of the present invention.

Since the element 60 can be expanded and contracted by the plurality of wrinkles 61, 61', and 61", the first terminal plate 42 connected to one end of the element 60 is connected to the tube through hole 11. In a state where it is placed at one end, the second terminal plate 52 connected to the other end of the element 60 is protruded from the other end of the tube through hole 11, and the tube is opened by the protruding second terminal plate 52. Insulating powder 70 can be injected into the inlet of the through hole 11.

On the other hand, as shown in FIG. 5, the unit wrinkles 61 (61') (61") are formed to surround the hole line 63 and include a narrow band 61a made of an alloy of copper and silver, and a narrow band 61a made of an alloy of copper and silver. It is formed on both sides of (61a) and consists of conduction bands (61b) made of copper.

The narrow band 61a has a greater resistance than the conduction band 61b, and accordingly, when an overcurrent or short-circuit current is applied to the element 60, it is quickly melted and disconnects the connected ESS circuit.

This element 60 increases the number of parallel connections between the first and second terminal plates 42 and 52 of the first and second terminal parts 40 and 50, thereby providing a high capacity fuse of 1000 to 1500 VDC and 100 KA or more. It can be implemented.

The insulating powder 70 is filled in the tube through hole 11 between the first and second terminal plates 42 and 52 and is melted by the heat generated when the element 60 is melted to insulate the area around the element 60. Let's do it.

The insulating powder 70 is implemented by mixing silica sand powder, which melts at high heat, for example, 500 to 700°C, and acrylic powder, which melts at relatively low heat, for example, 100 to 200°C, in a ratio of 1:1. Due to the insulating powder 70 made of silica sand powder and acrylic powder, the silica sand powder and acrylic powder close to the element 60, which is heated and melted as a current and voltage exceeding the rating are applied, are momentarily melted, and then the element 60 ) is melted and cooled rapidly. During this process, the silica sand powder in close contact with the element 60 hardens, and then the acrylic powder hardens and wraps around the silica sand powder. Accordingly, the element melt generated during the melting process remains separated by the insulating powder 70, thereby fundamentally blocking the possibility of the melt moving to another element and allowing current to flow again.

FIG. 6 is a diagram for explaining the operation of the indicator of FIG. 2.

As shown in FIG. 2, the indicator 80 has a main spring 81 installed inside the indicator hole 12 formed on the side of the tube 10, and the indicator is elastically supported on the main spring 81. The operating protrusion 82 is inserted into the hole 12, and the restraint heater 83 is connected to the first and second terminal parts 40 and 50 and constrains the operating protrusion 82 to be located inside the indicator hole 12. ) and a cap 84 installed to cover the operating protrusion 82 on the outside of the tube 10, and located on the upper side of the operating protrusion 82 while being inserted into the cap hole 84a formed in the cap 84. A sub-spring ( 86).

The lower end of the operating protrusion (82) is connected to the confinement heater (83) inside the tube through hole (11), and when the fuse assembly of the present invention operates normally, it is restrained by the confinement heater (83) and is located inside the indicator hole (12). is located in

The confinement heater 83 is connected to the first and second terminal plates 42 and 52 in parallel with the element 60. Since the confinement heater 83 is connected to the first and second terminal plates 42 and 52 in parallel with the element 60, it operates in a normal state when a normal current is applied to the first and second terminal portions 40 and 50. The protrusion 82 is restrained to be located inside the indicator hole 12, and a short-circuit current (overcurrent) is applied to the first and second terminal portions 40 and 50 and the element 60 is melted. As it is damaged, the restraint state of the operating protrusion 82 is released.

The indicator protrusion 85 is immersed in the cap hole 84a by the sub spring 86 in a normal state in which the rated current is applied, and when the restraint heater 83 is damaged in an abnormal state in which a short-circuit current flows, the indicator hole 12 ) and protrudes from the cap 84 in conjunction with the operating protrusion 82 protruding from the cap 84 to notify that a short-circuit current has been applied.

By this indicator 80, when the indicator protrusion 85 is immersed from the surface of the cap 84, it means that a normal current flows in the fuse assembly of the present invention, and the indicator protrusion 85 is immersed from the surface of the cap 84. If it protrudes, it means that the element 60 is in an abnormal state where it has been melted.

As such, according to the present invention, first and second brackets 20 and 30 and first and second terminal parts 40 and 50 are installed at both ends of the tube 10 made of a non-conducting material, and the tube 10 It is connected in parallel with the first and second terminal plates (42) (52) of the first and second terminal parts (40) (50) inside the tube through hole (11) and is thermally deformed and melted when more than the rated current is applied. By including multiple elements 60, a high capacity fuse of DC 1000~1500V and 100KA or more can be implemented.

In addition, a plurality of elements 60 connected in parallel to the first and second terminal plates 42 and 52 include a pleated strap 62 composed of a plurality of unit pleats 61, 61', and 61". , each of the unit wrinkles 61, 61', and 61" includes a hole line 63 formed by forming a plurality of holes 63a and 63b in the form of a line, thereby generating a current greater than the rated current. And when voltage is applied, the element 60 quickly melts and blocks the ESS circuit, thereby preventing damage to the ESS.

And, by the indicator 80, the state in which the element 60 is blown can be accurately recognized from the outside, making it possible to accurately determine whether or not the fuse assembly should be replaced.

The present invention has been described with reference to an embodiment shown in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom.

10 ... tube 11 ... tube through hole
12 ... Indicator hole 20 ... 1st bracket
21 ... 1st bracket hole 30 ... 2nd bracket
31 ... 2nd bracket hole 40 ... 1st terminal section
41 ... 1st load terminal 42 ... 1st terminal plate
50 ... 2nd terminal 51 ... 2nd load terminal
52 ... 2nd terminal plate 60 ... element
61, 61', 61" ... Unit wrinkle 61a ... Narrow band
61b ... conduction band 62 ... pleated strap
63 ... hole line 63a, 63b ... hole
70 ... Insulating powder 80 ... Indicator
81 ... main spring 82 ... operating protrusion
83 ... confinement heater 84 ... cap
84a ... cap hole 85 ... marking protrusion
86 ... subspring

Claims (7)

A tube (10) made of a non-conducting material with a tube through hole (11) formed therein;
First and second brackets (20) (30) coupled to both ends of the tube (10) and having first and second bracket holes (21) (31) formed on the inside;
A first rod terminal 41 penetrating the first bracket hole 21 and a first terminal fixed to the back of the first bracket 20 while being engaged with one side of the tube through hole 11. A first terminal portion 40 consisting of a plate 42;
A second rod terminal 51 penetrating the second bracket hole 31 and a second terminal fixed to the back of the second bracket 30 while being engaged with the other side of the tube through hole 11. A second terminal portion 50 consisting of a plate 52; and
A plurality of elements 60 connected in parallel to the first terminal plate 42 and the second terminal plate 52 to be located inside the tube through hole 11 and thermally deformed and melted when more than the rated current is applied. ; and
An indicator is installed on the side of the tube 10 between the first terminal 40 and the second terminal 50 and protrudes from the side of the tube 10 when the element 60 is blown to indicate fuse burnout. Contains (80);
The element 60 is a pleated strap 62 composed of a plurality of unit pleats 61, 61', and 61" connected between the first terminal plate 42 and the second terminal plate 52. ), and a hole line 63 formed in each of the unit wrinkles 61, 61', and 61", wherein a plurality of holes 63a and 63b are formed in the form of a line, The unit wrinkles 61, 61', and 61" are formed to surround the hole line 63 and include a narrow band 61a made of an alloy of copper and silver, and formed on both sides of the narrow band 61a. It includes a conduction band (61b) made of copper;
The indicator 80 includes a main spring 81 installed inside the indicator hole 12 formed on the side of the tube 10, and the indicator hole 12 in a state elastically supported by the main spring 81. An operating protrusion 82 inserted into the confinement heater 83 that is connected to the first and second terminal parts 40 and 50 and constrains the operating protrusion 82 to be located inside the indicator hole 12. and a cap 84 installed to cover the operating protrusion 82 on the outside of the tube 10, and an upper portion of the operating protrusion 82 while being inserted into the cap hole 84a formed in the cap 84. The display protrusion 85 located on the side and the inner side of the cap 84 apply an elastic force so that the display protrusion 85 comes into close contact with the operating protrusion 82, making it more elastic than the main spring 81. A high-capacity fuse assembly for ESS, characterized in that it includes a subspring (86) with a small coefficient. delete delete According to paragraph 1,
A high capacity fuse assembly for ESS, characterized in that it further includes insulating powder (70) filled in the tube through hole (11) between the first and second terminal plates (42) (52). According to paragraph 4,
The insulating powder 70 is. A high-capacity fuse assembly for ESS, characterized by mixing silica sand powder and acrylic powder in a ratio of 1:1. delete delete

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