WO2023214640A1

WO2023214640A1 - Large-capacity shunt

Info

Publication number: WO2023214640A1
Application number: PCT/KR2023/001308
Authority: WO
Inventors: 유병길
Original assignee: (주)케이엔씨
Priority date: 2022-05-04
Filing date: 2023-01-27
Publication date: 2023-11-09
Also published as: KR102483816B1

Abstract

The present invention provides a large-capacity shunt comprising: a first shunt block; a second shunt block partially overlapping the first shunt block in a vertical direction; and a shunt fixedly coupled between the first and second shunt blocks and having at least two bends.

Description

large capacity shunt

The present invention relates to a large-capacity shunt, and more specifically, to a large-capacity shunt that facilitates measurement of large currents.

In general, a shunt is basically an element used to measure current. The shunt is connected to the current-carrying circuit of an electrical or electronic device, and the current and voltage are measured using the resistance value that occurs when the current flows through the shunt. can do.

At this time, the shunt is sometimes called a shunt. Basically, a shunt is a resistor whose resistance is sufficiently low compared to the load. For example, a shunt whose resistance is sufficiently low compared to a motor can be installed in an energizing circuit to measure the current applied to the motor. By connecting to , the load voltage can be measured and the ultimate load current measurement can be made.

The shunt is a standard resistor to extend the current measurement range of the ammeter and is wired with the ammeter, allowing the load current to be measured through the ammeter.

On the other hand, secondary batteries are not permanent, but can be used by repeatedly charging current, so secondary batteries are often used as a power source for various electrical and electronic devices such as mobile phones, PDAs, and MP4s. For example, batteries using secondary batteries By mounting a shunt on a circuit configured to measure the current of the system, the current applied to the secondary battery system through the circuit and the shunt can be measured. Secondary batteries are used in electrical and electronic devices such as mobile phones, but are also used as the main power source for hybrid vehicles and electric vehicles, so measuring the current in the secondary battery using a shunt is important.

The battery system used in electric vehicles and fuel cell vehicles, including the hybrid vehicles described above, connects multiple secondary batteries in series to create voltage and can use this to generate high power. In order to generate this power, a current of tens to hundreds of amperes flows through the battery system. A method of measuring the current of such a battery system includes measuring the current using a shunt resistor. That is, current measurements can be performed by connecting a shunt to the circuitry of the battery system.

Recently, when current flows through a shunt, heat is generated, and when heat is generated, resistance increases, so the initial measured resistance of the shunt, the resistance when the current flows, and the resistance generated while using the shunt are not constant and have deviations. Since there are cases where it changes as it develops, research is being conducted to ensure that the resistance characteristics of the shunt do not change.

The purpose of the present invention is to provide a high-capacity shunt that facilitates measurement of large currents.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

The large-capacity shunt according to the present invention is fixedly coupled between a first shunt block, a second shunt block partially overlapping in the vertical direction with the first shunt block, and the first and second shunt blocks, and is formed with at least two bends. May include shunts.

Each of the first and second shunt blocks may be formed with a fixing groove in which a part of the shunt is fixedly coupled and an exposed groove formed in a vertical direction of the fixing groove so that a part of the shunt fixedly coupled to the fixing groove is exposed. .

A fastening screw that electrically connects a portion of the shunt and the power line of the printed circuit board may be coupled to the exposed groove of each of the first and second shunt blocks.

The shunt is fixedly coupled to a fixing groove formed in the first shunt block, a first shunt part extending in a first direction, fixedly coupled to a fixing groove formed in the second shunt block, and parallel to the first shunt part. It may include a second shunt unit and a third shunt unit connected to the first and second shunt units in a second direction crossing the first direction.

The third shunt unit may intersect at a vertical angle with at least one of the first and second shunt units.

A first heat dissipation frame disposed on the first side of the first shunt portion, a first auxiliary heat dissipation frame disposed on a second side of the first shunt portion and fastened to the first heat dissipation frame with screws, and a first auxiliary heat dissipation frame of the second shunt portion. It may further include a second heat dissipation frame disposed on one side and a second auxiliary heat dissipation frame disposed on a second side of the second shunt portion and fastened to the second heat dissipation frame with screws.

The first and second auxiliary heat dissipation frames may be formed to face each other and be spaced apart from each other.

The large-capacity shunt according to the present invention has the advantage of preventing noise and heat generation contained in the current even when a large current flows, making it easy to measure large currents and preventing damage to secondary batteries and circuit damage due to noise. there is..

Meanwhile, the effects of the present invention are not limited to the effects mentioned above, and various effects may be included within the range apparent to those skilled in the art from the contents described below.

1 is a side view showing a shunt resistor according to the present invention.

Figure 2 is a perspective view showing the first and second shunt blocks shown in Figure 1.

FIG. 3 is a perspective view showing a partial connection state of the shunt, the first heat dissipation frame, and the first auxiliary heat dissipation frame shown in FIG. 1.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components.

Terms such as first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention. The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a side view showing a shunt resistor according to the present invention, Figure 2 is a perspective view showing the first and second shunt blocks shown in Figure 1, and Figure 3 is a shunt, a first heat dissipation frame, and a first auxiliary heat dissipation frame shown in Figure 1. This is a perspective view showing some combination states.

1 to 3, the large-capacity shunt 100 includes first and

second shunt blocks

112 and 114, shunt 120, first and second

heat dissipation frames

132 and 136, and first and second auxiliary heat dissipation devices. It may include

frames

134 and 138.

The first and

second shunt blocks

112 and 114 are connection blocks electrically connected to the shunt 120 and may be made of a metal material, for example, copper.

Each of the first and

second shunt blocks

112 and 114 may be formed with a fixing groove (sh) and an exposed groove (h).

First, as shown in FIGS. 2(a) and 2(b), the fixing grooves (sh) of each of the first and

second shunt blocks

112 and 114 are fixedly coupled by inserting portions of both ends of the shunt 120. You can.

At this time, when the shunt 120 is inserted and fixed into the fixing groove (sh) of each of the first and second shunt blocks (112, 114), the fixing groove (sh) and the shunt 120 are electrically connected by soldering, etc. possible, and is not limited thereto.

In addition, a fastening screw (S) that electrically connects a portion of the shunt 120 and the power line of the printed circuit board (not shown) is coupled to the exposed groove (h) of each of the first and second shunt blocks (112, 114). It can be.

For example, when the (+) power line connected to the first shunt block 112 is connected, the second shunt block 114 transfers the current input through the first shunt block 112 to the connected (-) power line. Can be printed.

Both ends of the shunt 120 may be fixedly coupled to the fixing grooves (sh) of the first and second shunt blocks 112 and 114, respectively, and may be bent at least twice.

In an embodiment, the shunt 120 may include first to

third shunt portions

122, 124, and 126.

First, the first and second shunt parts 122 and 124 may extend in a first direction parallel to each other in the fixing grooves sh of the first and second shunt blocks 112 and 114, respectively.

The third shunt unit 126 may be connected to the first and second shunt units 122 and 124 in a second direction crossing the first direction.

The first to

third shunt portions

122, 124, and 126 may be formed to have the same thickness, but are not limited thereto.

For example, the third shunt portion 126 may be formed to be thicker than the first and second shunt portions 122 and 124.

Here, the third shunt unit 126 may intersect at a vertical angle with at least one of the first and second shunt units 122 and 124, but is not limited thereto.

A first heat dissipation frame 132 and a first auxiliary heat dissipation frame 134 may be disposed in the first shunt unit 122.

Here, the first heat dissipation frame 132 and the first auxiliary heat dissipation frame 134 may be in close contact with the first shunt portion 122 so that heat generated in the first shunt portion 122 is dissipated.

The first heat dissipation frame 132 is disposed on the first side of the first shunt portion 122, and the first auxiliary heat dissipation frame 134 is disposed on a second side of the first shunt portion 122 opposite to the first side. can be placed in

The first heat dissipation frame 132 and the first auxiliary heat dissipation frame 134 may be placed between the first shunt portion 122 and fastened with screws P to be closely fixed to the first shunt portion 122.

In the embodiment, the first heat dissipation frame 132 and the first auxiliary heat dissipation frame 134 are described as being fastened with screws P, but the fastening method is not limited.

A second heat dissipation frame 136 and a second auxiliary heat dissipation frame 138 may be disposed in the second shunt unit 124.

Here, the second heat dissipation frame 136 and the second auxiliary heat dissipation frame 138 may be in close contact with the second shunt portion 124 so that heat generated in the second shunt portion 124 is dissipated.

The second heat dissipation frame 136 is disposed on the first side of the first shunt portion 124, and the second auxiliary heat dissipation frame 138 is disposed on a second side of the second shunt portion 124 opposite to the first side. can be placed.

The second heat dissipation frame 136 and the second auxiliary heat dissipation frame 138 may be placed between the second shunt portion 124 and fastened with screws P to be closely fixed to the second shunt portion 124.

In the embodiment, the second heat dissipation frame 136 and the second auxiliary heat dissipation frame 138 are described as being fastened with screws P, but the fastening method is not limited.

Here, when the first and second auxiliary heat dissipation frames 134 and 138 are disposed on the first and second shunt units 122 and 124 to face each other, they may be spaced apart at a predetermined distance.

The printed circuit board may be inserted and fixed in the space formed between the first and second auxiliary heat dissipation frames 134 and 138, but is not limited thereto.

Here, Figure 3 is a partial perspective view showing the combined structure of the first heat dissipation frame 132 and the first auxiliary heat dissipation frame 134, and the first heat dissipation frame 132 and the first auxiliary heat dissipation frame 134 are screwed (P). ) may be formed wider than the width of the shunt 120 for combination.

The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

In addition, although the above description focuses on the embodiments, this is only an example and does not limit the present invention, and those skilled in the art will understand the above examples without departing from the essential characteristics of the present embodiments. You will be able to see that various modifications and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims

first shunt block;

a second shunt block partially overlapping the first shunt block in a vertical direction; and

It is fixedly coupled between the first and second shunt blocks and includes a shunt bent at least twice,

High volume shunt.
According to claim 1,

Each of the first and second shunt blocks,

A fixing groove to which a part of the shunt is fixedly coupled, and an exposed groove formed in a vertical direction of the fixing groove to expose a part of the shunt fixedly coupled to the fixing groove,

High volume shunt.
According to claim 2,

In the exposed grooves of each of the first and second shunt blocks,

A fastening screw that electrically connects a portion of the shunt and the power line of the printed circuit board is coupled,

High volume shunt.
According to claim 1,

The shunt is,

a first shunt portion fixedly coupled to a fixing groove formed in the first shunt block and extending in a first direction;

a second shunt portion that is fixedly coupled to a fixing groove formed in the second shunt block and is parallel to the first shunt portion; and

Comprising a third shunt unit connected to the first and second shunt units in a second direction intersecting the first direction,

High volume shunt.
According to claim 4,

The third shunt unit,

Intersecting at a vertical angle with at least one of the first and second shunt parts,

High volume shunt.
According to claim 4,

a first heat dissipation frame disposed on a first side of the first shunt portion;

a first auxiliary heat dissipation frame disposed on a second surface of the first shunt portion and fastened to the first heat dissipation frame with screws;

a second heat dissipation frame disposed on a first side of the second shunt portion; and

Further comprising a second auxiliary heat dissipation frame disposed on the second surface of the second shunt portion and fastened to the second heat dissipation frame with screws,

High volume shunt.
According to claim 6,

The first and second auxiliary heat dissipation frames are:

Formed to be spaced apart and facing each other,

High volume shunt.