KR101662520B1 - Clad multistage burning fuse - Google Patents

Abstract

The present invention relates to a clad multistage harmless fuse, and more particularly, to a clad multistage harmless fuse having a first terminal portion at both ends thereof; A second terminal portion; And a connection portion connecting the first terminal portion and the second terminal portion to allow current to flow through the first terminal portion and the second terminal portion, wherein the connection portion has a multi-stage structure including two or more terminal portions having different cross- It is possible to secure a quick melting time regardless of the cross-sectional area of a wide fusing part when an over-current is generated. Therefore, it is possible to improve the fusing function while reducing the malfunction of physical external factors such as vibration and shock required by automobiles The present invention relates to a clad multistage blown fuse having an effect capable of reducing the size of the fuse.

Description

CLAD MULTISTAGE BURNING FUSE}

The present invention relates to a multistage clad multistage blown fuse, and more particularly, to a multistage clad multistage blown fuse capable of securing a wide cross-sectional area and a rapid fusing time in order to solve the problem of damage due to impact, vibration, Lt; / RTI > fuse.

In the case of environmentally friendly vehicles such as hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), electric vehicles (EV), etc., high- There is a risk that high-voltage electricity flows through the vehicle body, leading to secondary accidents.

To prevent this, there is a need for a component having a function of shutting off the power supply in the battery system in case of an accident or the like. At this time, the parts that function to cut off the power supply should be able to cut off the power supply itself without the help of the outside when the over current occurs. In the case of a vehicle such as a hybrid vehicle (HEV) or a plug-in hybrid vehicle (PHEV) in which an engine and a motor are simultaneously used, high-volatile substances such as volatiles are used as fuel. The generation of flame must be minimized when the power is turned off. In addition, when power is cut off, it should be cut off promptly, and there should be no malfunction due to vibration or impact generated in the running of a general vehicle.

On the other hand, in the case of a fuse used in general electronic products, in order to increase the resistance, the cross-sectional area of the fuse end portion is made very small so that the fuse portion is cut off when an overcurrent occurs. In this case, it is possible to stably fuse when an overcurrent occurs. However, in the case of a main power source such as a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHEV), and an electric vehicle (EV), the voltage is high and the current size is large, There is a limit.

In order to solve such a problem, a conventional large-current fuse has a multi-path design of a fuse end as disclosed in Japanese Unexamined Patent Application Publication No. 2005-116642, but it is difficult to apply the fuse for a vehicle because it is weak in vibration or impact .

In the case of the clad refuse described in Japanese Patent Application Laid-Open No. 2010-3528, a fuse is formed using a clad in which copper (Cu), aluminum (Al) and copper (Cu) are laminated, (Al) having a relatively low melting point forms a free end portion and copper (Cu) having a relatively high melting point forms a connection terminal.

However, such a technique has an advantage that the joint and the connection terminal can be used as different metals, but also has a problem that it is weak to vibration or impact.

Accordingly, the present inventor has developed a fuse capable of quickly blocking power supply and preventing malfunction due to vibration or impact when an overcurrent occurs.

Japanese Unexamined Patent Application Publication No. 2005-116642 (published on April 28, 2005) Japanese Unexamined Patent Application Publication No. 2010-3528 (published on Jan. 7, 2010)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a cladding which is a dissimilar metal bonding material and includes two or more free ends having different cross- Which is capable of improving the blowing function while reducing the malfunction of the clad multistage blown fuse.

According to another aspect of the present invention, there is provided a clad multistage harmless fuse including: a first terminal portion at both ends; A second terminal portion 120; A connection part 130 connecting the first terminal part 110 and the second terminal part 120 so that current can flow through the first terminal part 110 and the second terminal part 120; The connection unit 130 is a multi-stage structure including two or more free ends 140 having different cross-sectional areas.

The first terminal portion 110, the second terminal portion 120 and the connection portion 130 are made of a clad and the clad is composed of a copper (Cu) layer, an aluminum (Al) layer, and a magnesium (Mg) Is preferably a layered structure including at least two selected from the group consisting of

More preferably, the clad is a layered structure in which a copper (Cu) layer 101, an aluminum (Al) layer 102 and a copper (Cu) layer 103 are sequentially stacked.

The fusing end 140 includes a second fusing part 140b having a small sectional area and a first fusing part 140a having a large sectional area and the second fusing part 140b includes a first fusing part 140a, It is preferable to be fused first.

As described above, the present invention having such a construction as described above uses a clad which is a dissimilar metal bonding material in which metal plates having different melting points are laminated and bonded, and includes two or more fusing ends having different cross-sectional areas, It is possible to secure a quick melting time in spite of the sectional area of the negative portion. Therefore, there is an effect that the malfunctioning can be improved while reducing the malfunction against physical external factors such as vibration and shock required by automobiles.

1 is a perspective view of a clad multistage harmless fuse 100 according to the present invention.
2 is a plan view of the clad multi-stage flawless fuse.
3 is a plan view of a conventional single structure fuse.
4 is a cross-sectional view of a clad having a layered structure in which a copper (Cu) layer, an aluminum (Al) layer and a copper (Cu) layer are stacked in order.
5 is a graph showing the fusing time with respect to the current amounts of the comparative example and the example.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Hereinafter, the present invention will be described in detail. The present invention relates to a clad multistage harmless fuse which is composed of a clad material and includes two or more free ends having different cross-sectional areas, so that it is possible to quickly block the overcurrent when a stable structure is maintained.

More specifically, FIG. 1 is a perspective view of a clad multistage destructive fuse 100 according to the present invention, and FIG. 2 is a plan view of the multistage destructive cladding. As shown in the figure, the clad multistage harmless fuse includes a first terminal part 110 at both ends of the fuse; A second terminal portion 120; A connection part 130 connecting the first terminal part 110 and the second terminal part 120 so that current can flow through the first terminal part 110 and the second terminal part 120; And the like. In particular, the connection part 130 may have a multi-stage structure including two or more free ends 140 having different cross-sectional areas.

The terminal end 140 of the multi-stage structure may have two or more terminal ends 140 having different cross-sectional areas. When the overcurrent flows into the terminal end 140, a single terminal 140 having a single cross- So that the melting time can be further shortened.

A current is applied to the first terminal part 110 and the second terminal part 120 connected to the connection part 130 including the second fusing part 140b having a small cross-sectional area and the first fusing part 140a having a large cross- The second fusing end 140b having a smaller cross-sectional area has a larger electrical resistance than the first fusing part 140a having a larger cross-sectional area. When the overcurrent flows, the second fusing part 140b is separated from the first fusing part 140a, (140a).

When the second fuse 140b having a large resistance is fired, the first fuse 140a is also fused in a few tens of milliseconds as a current that has flowed to both ends of the second fuse 140b flows into the first fuse 140a. By the principle of this fusing step, the fusing step of the multi-stepped fusing part 140 having different cross-sectional areas can be fired in a shorter time than the fusing of the single-piece connecting part 130 having one large cross-sectional area.

The first terminal portion 110, the second terminal portion 120, and the connecting portion 130 are claddings which are mechanically bonded to each other by rolling a metal plate having a different melting point, and the clad is made of copper (Cu) (Al) layer containing aluminum (Al), a magnesium (Mg) layer containing magnesium (Mg), and the like.

More specifically, the clad is preferably a layered structure including at least two selected from the group consisting of a copper (Cu) layer, an aluminum (Al) layer and a magnesium (Mg) layer, ) Layer, an aluminum (Al) layer and a copper (Cu) layer are sequentially stacked; Or a layered structure in which copper, magnesium and copper are sequentially stacked; Or a layered structure in which copper, aluminum and magnesium are stacked in order; (Cu) layer 101, an aluminum (Al) layer 102, and a copper (Cu) layer 102, as shown in FIG. 4, ) Layer 103 are stacked in this order.

If a single material is used without using a clad material for a fuse as in the present invention, the shorter the fusing time at the same current, the more the material having a lower melting point is used. However, due to problems such as increase in resistance of the fuse and deterioration of strength, it is not possible to use only materials having a low melting point unconditionally.

However, when a clad which is a dissimilar metal bonding material as in the present invention is used, the melting point and the resistance of the metal constituting the clad are different from each other, so that the melting characteristic and the like superior to the fuse constituted by a single material can be expected.

In the case of a fuse having a layered connection 130 in which a copper (Cu) layer, an aluminum (Al) layer and a copper (Cu) layer are sequentially stacked, When the layer is first melted and the aluminum (Al) layer is fused, the copper (Cu) layer is also fused in a short time because the current concentrates on the remaining copper (Cu) layer.

Such a layered structure can provide a stable structure so as to prevent damage or freezing of vibration or shock by increasing the cross-sectional area of the fusing part 140, and it is possible to secure a rapid fusing time due to stepwise fusing in the occurrence of an overcurrent.

Therefore, with only one multi-stage disconnection fuse made up of a layered cladding in which three layers with different melting points are stacked and three layers with different melting points and three melting ends having different melting points, The same effects as the nine parallel connection structures of the fuse of a single material included can be realized.

In addition, since each layer constituting the clad does not need to be insulated or separated from each other, a more stable structure can be physically provided to external factors such as vibration and impact.

Meanwhile, the clad multistage harmless fuse according to the present invention can be physically applied to a fuse of an automobile, because it can ensure a stable structure against vibration or impact, A plug-in hybrid electric vehicle, an electric vehicle, and the like.

[Example]

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are merely illustrative of the present invention and that the scope of the present invention is not construed as being limited by these embodiments.

The clad multistage disconnection fuse according to the present invention and the fuse according to the prior art were manufactured in Examples and Comparative Examples, respectively, and the melting time according to the amount of current was measured and compared.

division Material Structure of connection Comparative Example 1 Copper (Cu) Single structure Comparative Example 2 Copper (Cu) Multistage structure Comparative Example 3 Aluminum (Al) Single structure Comparative Example 4 Aluminum (Al) Multistage structure Comparative Example 5 Copper (Cu) / aluminum (Al) / copper (Cu)
Clad Single structure Example 1 Copper (Cu) / aluminum (Al) / copper (Cu)
Clad Multistage structure

Table 1 is a table comparing the structure of the fuse material and the connection portion of the comparative example and the example. The material of Comparative Example 1 is copper (Cu), and the connecting portion is a single structure consisting of a single terminal portion. The material of Comparative Example 2 is copper (Cu), and the connecting portion is a multi-stage structure composed of two free ends. The material of Comparative Example 3 is aluminum (Al), and the connecting portion is a single structure composed of a single terminal portion. The material of Comparative Example 4 is aluminum (Al), and the connecting portion is a multi-stage structure composed of two free ends. The material of Comparative Example 5 is a three-layered clad having a lamellar structure in which copper (Cu), aluminum (Al) and copper (Cu) are laminated in order, and the connecting portion is a single structure composed of a single terminal portion. The material of Comparative Example 6 is a three-layered clad having a lamellar structure in which copper (Cu), aluminum (Al) and copper (Cu) are laminated one after the other, and the connecting portion has a multi-stage structure composed of two terminal portions.

The fusing time with respect to the amount of current is shown in a graph as shown in Fig. 5 for Comparative Examples 1 to 5 and Example 1 having different materials and connecting portions. As shown in FIG. 5, when the amount of current was 1000 A, the largest difference in melting time was shown, and the melting time of Comparative Example 2 was shorter than that of Comparative Example 1.

In other words, since the fusing time of Comparative Example 2 including the multistage structure connecting portion consisting of two fusing portions having different cross-sectional areas is shorter than that of Comparative Example 1 including a single structure connecting portion composed of one fusing portion, It was found that the multi - stage structure is effective in reducing the fusing time. The difference in fusing time according to the structure of the connecting portion was also found by comparing Comparative Example 3 and Comparative Example 4, and it was also found by comparing Comparative Example 5 and Example 1. [

In addition, since the melting time of Comparative Example 3 using aluminum (Al) as a base material and Comparative Example 4 using the material of copper (Cu) as a base material is shorter than that of Comparative Example 1 and Comparative Example 2, And Comparative Example 6 in which a clad in which copper (Cu), aluminum (Al), and copper (Cu) were laminated in order as three layers was used as a material, It was confirmed that the melting of the clad was easier than that of aluminum (Al) because the melting time was shorter than that of Comparative Example 4. [

Therefore, in the case of using the clad in which the copper (Cu), the aluminum (Al) and the copper (Cu) were sequentially stacked as the three layers including the connecting portion of the multi- It is confirmed that the fusing time of the fuse is the shortest. Therefore, a fuse having a multi-step structure including two or more fuse tips having different cross-sectional areas as in the first embodiment, ) And the like are stacked in this order on the clad material.

Although the present invention has been described in connection with the specific embodiments of the present invention, it is to be understood that the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. Various modifications and variations are possible.

100: fuse 140:
101: copper (Cu) layer 140a: first fusing part
102: aluminum (Al) layer 140b: second fusing part
103: Copper (Cu) layer
110: first terminal portion
120: second terminal portion
130:

Claims (4)

A first terminal portion 110 at both ends; A second terminal portion 120; And
And a connection part 130 connecting the first terminal part 110 and the second terminal part 120 so that a current can flow through the first terminal part 110 and the second terminal part 120,
The connection unit 130 has a multi-stage structure including two or more free ends 140 having different cross-
The material of the first terminal portion 110, the second terminal portion 120, and the connection portion 130 is a clad,
The clad is a layered structure including two or more selected from the group consisting of a copper (Cu) layer, an aluminum (Al) layer and a magnesium (Mg) layer,
The free end 140 includes a second free end 140b having a small cross-sectional area and a first free end 140a having a large cross-
Wherein the second fusing end (140b) is fired in preference to the first fusing end (140a).
delete The method according to claim 1,
Wherein the clad is a layered structure in which a copper (Cu) layer 101, an aluminum (Al) layer 102 and a copper (Cu) layer 103 are sequentially stacked.
delete

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