KR20160124332A

KR20160124332A - Current sensor module with integrally modularized a magnetic core and a hall sensor integrated circuit, and current sensor box for car battery with the same

Info

Publication number: KR20160124332A
Application number: KR1020150054157A
Authority: KR
Inventors: 강민정
Original assignee: 강민정
Priority date: 2015-04-17
Filing date: 2015-04-17
Publication date: 2016-10-27

Abstract

The present invention relates to a magnetic core and a Hall sensor integrated circuit in which a magnetic core and a hall sensor IC are integrated with each other to improve reliability of current measurement of an automobile battery, To a current sensor box for a battery.
According to the present invention, the gap between the magnetic core and the Hall sensor integrated circuit is kept constant by providing the IC chip for a single current sensor by integrally modulating the magnetic core and the Hall sensor integrated circuit, Can be improved.

Description

TECHNICAL FIELD [0001] The present invention relates to a current sensor integrated with a magnetic core and a Hall sensor integrated circuit, and a current sensor box for a car battery having the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current sensor for measuring a current of an automobile battery and, more particularly, to a current sensor for measuring a current of a magnetic core And a Hall sensor integrated circuit, and a current sensor box for an automobile battery having the current sensor.

In recent years, in order to meet the needs of the driver, in addition to various electric devices necessary for automobiles, a variety of additional electronic devices have been installed, so that the battery consumption of the automobile has been increased. As a result, the battery is frequently discharged in the winter, There arises a problem that the vehicle can not be started.

To solve this problem, it is necessary to increase the battery capacity. However, since the increase in the battery capacity leads to a rise in cost or a decrease in fuel efficiency due to an increase in the weight of the vehicle, there is a limit to increase the capacity of the battery. Accordingly, it has been sought to solve the discharge problem of the battery by efficiently operating the electricity consumed in the electric devices and electronic devices mounted on the vehicle without increasing the capacity of the battery.

One of them is a method of measuring battery current using a non-contact type hall sensor. An example thereof is Korean Patent No. 10-1398219 (Registered on Apr. 25, 2015), Korean Registered Patent No. 10-1413483 (Registered on Apr. 25, 2014), Korean Registered Patent No. 10-1413484 , June 24, 2004). The battery current measuring method using the Hall sensor according to the related art, including the above-described prior arts, measures the current of the battery using a hall sensor and measures the operation of the electric device and the electronic device mounted on the vehicle according to the measured current of the battery. Thereby preventing the battery from being discharged.

However, since the battery current sensor using the Hall sensor according to the related art has a structure in which most of the magnetic core (shield member) and the Hall sensor integrated circuit are mounted on the printed circuit board and simply installed inside the sensor body, And the Hall sensor integrated circuit are not firmly fixed to each other. Therefore, in the process of installing the magnetic core and the Hall sensor integrated circuit in the sensor body, the magnetic core or Hall sensor integrated circuit flows or is installed inside the sensor box The distance between the magnetic core and the Hall sensor integrated circuit fluctuates due to the vibration, which has a limitation in accurately measuring the battery current.

KR 10-1398219 B1, 2014. 05. 15. KR 10-1413483 B1, 2014. 06. 24. KR 10-1413484 B1, 2014. 06. 24.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the problems of the prior art, and it is an object of the present invention to provide a Hall sensor integrated circuit which is integrated with a magnetic core by integrally modulating the magnetic core and Hall sensor integrated circuit, And a current sensor box for a car battery having the same.

According to one aspect of the present invention, there is provided a magnetic core comprising: a magnetic core having a shape of '⊂'; an internal bus bar orthogonal to one end and the other end of the magnetic core; And a fixing member for covering the magnetic core and the Hall sensor integrated circuit so as to expose both ends of the internal bus bar and modularly integrating the magnetic core and the Hall sensor integrated circuit together The magnetic core and the Hall sensor integrated circuit including the magnetic core and the Hall sensor integrated circuit are integrated into one module.

Preferably, the fixing member is formed by placing a molding material in the mold after the inner bus bar and the Hall sensor integrated circuit are placed between the one end and the other end of the magnetic core, and then the molding material is injected into the mold .

Preferably, the Hall sensor integrated circuit is disposed at the center between one end and the other end of the magnetic core in the up, down, left, and right directions.

According to another aspect of the present invention for achieving the above object, there is provided a method of manufacturing a Hall sensor integrated circuit, comprising: connecting the current sensor and one end of the internal bus bar exposed without being covered by the fixing member, A printed circuit board for connector connection, electrically connected to the current sensor mounting printed circuit board, and a printed circuit board mounted on the printed circuit board for connector connection, the current sensor mounting printed circuit board being electrically connected to both ends of the internal bus bar, A sensor, a printed circuit board for mounting the current sensor, an external bus bar, and a printed circuit board for connector connection, and a plurality of connector terminals electrically connected to the printed circuit board for connector connection, The present invention provides a current sensor box for an automotive battery, .

As described above, according to the present invention, by providing the IC chip for a single current sensor by modularly integrating the magnetic core and the Hall sensor integrated circuit, the gap between the magnetic core and the Hall sensor integrated circuit is always maintained constant, The reliability of the current measurement of the battery can be improved.

Further, according to the present invention, since the magnetic core except for the printed circuit board, the Hall sensor integrated circuit, and the bus bar are provided as an IC chip for a single current sensor in which the bus bar is integrally modularized, defects occurring in the process of mounting on a printed circuit board It can be prevented at the source. Further, the structure is simple, the mounting is easy on the printed circuit board, and the replacement is easy.

1 is a perspective view showing a current sensor box for a car battery according to an embodiment of the present invention;
2 is an exploded perspective view of the current sensor box for an automobile battery shown in Fig.
3 is a perspective view showing the inside of a current sensor box for an automobile battery shown in Fig. 1; Fig.
Fig. 4 is a view showing a state in which the current sensor shown in Fig. 2 is mounted on a circuit board for mounting a current sensor; Fig.
5 is an exploded perspective view of the structure shown in Fig.
6 is a perspective view illustrating the current sensor shown in FIG. 2;
7 is an exploded perspective view of the current sensor shown in Fig.
8 (a) is a plan view of the current sensor shown in Fig. 6 viewed from above. Fig.
8 (b) is a cross-sectional view along the II 'perforation line shown in FIG. 8 (a).
Fig. 9 (a) is a side view of the current sensor shown in Fig. 6 viewed from one side. Fig.
9 (b) is a sectional view taken along the II-II 'perforation line shown in FIG. 9 (a).
10 is a view for explaining operation characteristics of a current sensor according to the present invention;

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various other forms.

The present embodiments are provided so that the disclosure of the present invention is thoroughly disclosed and that those skilled in the art will fully understand the scope of the present invention. And the present invention is only defined by the scope of the claims. Thus, in some embodiments, well known components, well known operations, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention.

In addition, like reference numerals refer to like elements throughout the specification. Moreover, terms used herein (to be referred to) are intended to illustrate the embodiments and are not intended to limit the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. Also, components and acts referred to as " comprising (or comprising) " do not exclude the presence or addition of one or more other components and operations.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless they are defined.

Hereinafter, the technical features of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view illustrating a current sensor box for a car battery according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a current sensor box for a car battery shown in FIG. 1, Fig. 4 is a view showing a state in which the current sensor shown in Fig. 2 is mounted on the circuit board for mounting the current sensor, Fig. 5 is a cross- Fig.

1 to 5, a current sensor box 1 for an automotive battery according to an embodiment of the present invention includes a sensor body 10, a current sensor 20, a printed circuit board 30 for mounting a current sensor, A connecting printed circuit board 40 and an external bus bar (not shown).

1 and 3, the sensor body 10 is made of synthetic resin (plastic) through an injection molding process. Inside the sensor body 10, a current sensor 20, a printed circuit board 30 for mounting a current sensor, And a printed circuit board 40 for connector connection are mounted. The sensor body 10 has a connector portion connected to an external harness (not shown).

For example, the sensor body 10 mounts the current sensor 20 on the upper portion of the current sensor mounting printed circuit board 30 and connects the connector connection printed circuit board 40 to the current sensor mounting printed circuit board 30, and the sensor body 10 is manufactured through the in-situ injection forming process in a state where the external bus bar is coupled to the printed circuit board 30 for mounting the current sensor.

1, the connector unit may be integrally formed with the sensor body 10 through an injection molding process so as to communicate from the side of the sensor body 10 and extend outwardly. The connector portion is provided with a plurality of connector terminals 11 made of a conductive metal material.

3, the connector terminal 11 may be fixed to the connector portion in such a manner that one end thereof is exposed to the inner space of the connector portion and the other end thereof is exposed to the inner space of the sensor body 10. [ For example, a plurality of connector terminals 11 may be in-situ injected together and integrated into the connector portion when the connector portion is injection molded together with the sensor body 10. [

Each of the connector terminals 11 has one end connected to the connection terminals of the external harness and the other end connected to the printed circuit board 40 for connector connection mounted inside the sensor body 10. A signal corresponding to the current value measured from the current sensor 20 and output from the connector circuit board 40 is input to the connector terminal 11 and is transmitted to the electronic control unit (ECU, Electronic Control Unit).

The external bus bar is made of a conductive metal material and may be formed of first and second bus bars. One end of each of the first and second bus bars is electrically connected to both ends of the internal bus bar 22 of the current sensor module 20 mounted in the sensor body 10 through the sensor body 10 And the other end may be exposed to the outside of the sensor body 10. At this time, the first and second bus bars may be tightly coupled to the through holes of the sensor body 10, or may be integrated with the sensor body 10 by in-situ injection when the sensor body 10 is injection-molded.

The bus bar of one of the first and second bus bars may be coupled to the other end of the bus bar, and the other end of the other bus bar may be coupled to the ground cable. Therefore, the first and second bus bars can be grounded via a ground cable connected to the vehicle body and a current is induced through the post terminal connected to the minus terminal of the battery.

3 to 5, the circuit board 40 for connector connection is mounted inside the sensor body 10 to electrically connect the printed circuit board 30 for current sensor mounting and the connector terminal 11 do. In the present invention, the connector-connecting printed circuit board 40 is physically separated from the printed circuit board 30 for mounting the current sensor. However, It can be manufactured integrally with the circuit board 30.

The current sensor mounting printed circuit board 30 is mounted on the upper portion of the printed circuit board 30 and electrically connected to the Hall sensor integrated circuit 23 of the current sensor 20, And the current value of the automobile battery measured through the current sensor 20 is connected to the printed circuit board 40 for connector connection.

The current sensor mounting printed circuit board 30 is provided with a coupling hole 31 through which both ends 22a and 22b of the internal bus bar 22 of the current sensor 20 And a coupling groove in which the connector-connecting printed circuit board 40 is vertically coupled can be formed between the coupling holes 31. [

6 is an exploded perspective view of the current sensor shown in Fig. 6, Fig. 8 (a) is a sectional view of the current sensor shown in Fig. 6, 8 (b) is a cross-sectional view along II 'cut-away line shown in FIG. 8 (a), and FIG. 9 (a) is a side view of the current sensor shown in FIG. 6, And FIG. 9 (b) is a cross-sectional view taken along the II-II 'perforation line shown in FIG. 9 (a).

6 to 9, the current sensor 20 according to the present invention includes a magnetic core 21, an internal bus bar 22, a Hall sensor integrated circuit 23, a fixing member 24, .

The magnetic core 21 may be made of a ferromagnetic metal plate, as shown in Figs.

The magnetic core 21 has a structure in which one end 21a and the other end 21b of the magnetic core 21 are bent in a ⊂ shape such that the end 21a and the other end 21b face each other. 21b are vertically spaced apart from each other at regular intervals. The inner bus bar 22 is arranged so as to be orthogonal to one end 21a of the magnetic core 21 and the inner bus bar 22 is arranged between the one end 21a and the other end 21b of the magnetic core 21, And the Hall sensor integrated circuit 23 is arranged on the front side.

The internal bus bar 22 is made of a conductive metal material, for example, copper or a copper alloy having a low resistance value. 5 and 7, the inner bus bar 22 is exposed to the outside without being covered by the fixing member 24 so that the connection bar 22 of the current sensor mounting printed circuit board 30, And a connecting portion 22c connected to the other end portions 22a and 22b is disposed so as to be orthogonal between the one end portion 21a and the other end portion 21b of the magnetic core 21. At this time, both end portions 22a and 22b may be bent downward so as to be stably coupled to the coupling hole 31 at the upper portion of the current sensor mounting printed circuit board 30. [

8 and 9, the Hall sensor integrated circuit 23 includes one end portion 21a and the other end portion 21b of the magnetic core 21 on the front side of the internal bus bar 22 so as to be parallel to the internal bus bar 22 To measure a current flowing in the internal bus bar 22. [0053] That is, the hall sensor integrated circuit 23 uses the Hall effect, which is a physical phenomenon in which a potential difference is generated at both ends of the conductor when the magnetic field is used to link the conductor through which the current flows, .

The Hall sensor integrated circuit 23 stably measures the current flowing through the internal bus bar 22 as shown in Figs. 8B and 9B, thereby improving the reliability of current measurement The magnetic core 21 is preferably disposed at the center between one end 21a and the other end 21b of the magnetic core 21 in the up-and-down and left-right directions. That is, the Hall sensor integrated circuit 23 has a gap between the Hall element 23a (Hall element) and one end 21a of the magnetic core 21 and the gap between the Hall element 23a and the other end The Hall element 23a and the left and right ends 21a and 21b of the magnetic core 21 are arranged in the left and right directions (i.e., the direction in which the internal bus bar 22 is perpendicular to each other) And the gap between the Hall element 23a and the right side portions of both ends 21a and 21b of the magnetic core 21 are arranged to be equal to each other.

The Hall sensor integrated circuit 23 includes connection terminals 23b, 23c, and 23d exposed without being covered by the fixing member 24. [ The connection terminals 23b, 23c, and 23d are electrically connected to the current sensor mounting printed circuit board 30 as shown in Fig. At this time, the connection terminal 23b is connected to the 'VCC' terminal, the connection terminal 23c is connected to the 'GND' terminal, and the connection terminal 23d is connected to the 'VOUT' terminal. Thus, the battery current measured through the hall element 23a is amplified by the hall sensor integrated circuit 23 to a signal corresponding thereto, and is output through the connection terminal 23d.

The fixing member 24 fixes the Hall sensor integrated circuit 23 in a state in which the Hall sensor integrated circuit 23 is disposed at the center between one end 21a and the other end 21b of the magnetic core 21 in the upper and lower left and right directions of the magnetic core 21 The magnetic core 21 and the Hall sensor integrated circuit 23 are integrated into one unit. That is, the fixing member 24 covers the magnetic core 21 and the hall sensor integrated circuit 23 so as to keep the gap between the magnetic core 21 and the Hall sensor integrated circuit 23 constant at all times, Modularization.

The fixing member 24 is formed as a molding member by in-situ injection molding using an epoxy resin or the like. For example, the fixing member 24 is placed in a state where the inner bus bar 22 and the Hall sensor integrated circuit 22 are disposed between the one end 21a and the other end 21b of the magnetic core 21 Then, a mold material such as an epoxy resin is injected into the mold.

The current sensor 20 according to the present invention is configured such that the Hall sensor integrated circuit 23 is connected to the magnetic core 21 through the fixing member 24 formed in the in- The gap between the magnetic core 21 and the Hall sensor integrated circuit 23 is always kept constant by being modularized and integrally fixed in a state of being disposed at the center between the first end 21a and the second end 21b, So that the reliability of measurement of the battery current can be improved.

10 is a view for explaining operation characteristics of the current sensor according to the present invention.

10, when a magnetic field is generated by the magnetic core 21 and current flows through the inner bus bar 22 in the direction perpendicular to the magnetic field generated by the magnetic core 21, And a potential difference (Hall voltage) is generated in a direction perpendicular to the current, and the potential difference thus generated is applied to the Hall sensor integrated circuit 23 And outputs a signal corresponding thereto through the output terminal Vout.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. 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.

1: Current sensor box for car batteries
10: Sensor body
11: Connector terminal
20: Current sensor
21: Magnetic core
22: Internal bus bar
23: Hall sensor integrated circuit
24: Fixing member
30: Printed circuit board for current sensor mounting
40: printed circuit board for connector connection

Claims

A magnetic core having a shape of '⊂';
An inner bus bar orthogonal to one end of the magnetic core and the other end;
A Hall sensor integrated circuit disposed between one end and the other end of the magnetic core so as to be aligned with the bus bar; And
A fixing member covering the magnetic core and the Hall sensor integrated circuit such that both ends of the internal bus bar are exposed and modularly integrating the magnetic core and the Hall sensor integrated circuit together;
Wherein the magnetic core and the Hall sensor integrated circuit are integrally modularized.

The method according to claim 1,
Wherein the fixing member is formed by placing a molding material in a mold after the inner bus bar and the Hall sensor integrated circuit are placed between the one end and the other end of the magnetic core and then injecting a molding material into the mold. A current sensor in which the integrated circuit is modularly integrated.

The method according to claim 1,
Wherein the Hall sensor integrated circuit is disposed at the center between one end and the other end of the magnetic core in the up, down, left, and right directions, and the Hall sensor integrated circuit is modularly integrated.

A current sensor according to any one of claims 1 to 3;
A printed circuit board for current sensor mounting, wherein one end and the other end of the internal bus bar are not covered by the fixing member and are exposed, and the connection terminals of the Hall sensor integrated circuit are electrically connected;
An external bus bar coupled to both ends of the internal bus bar;
A printed circuit board for connector connection electrically connected to the printed circuit board for mounting the current sensor; And
Wherein the current sensor, the printed circuit board for mounting the current sensor, the external bus bar, and the printed circuit board for connector connection are mounted inside, and a plurality of connector terminals electrically connected to the connector- A sensor body having a connector portion formed thereon;
And the current sensor box for a car battery.