Current measuring device
阅读说明:本技术 电流测定装置 (Current measuring device ) 是由 远藤保 于 2018-06-25 设计创作,主要内容包括:一种用于测定电流的电流测定装置,包括:供电流流过的导体;电路板,该电路板包括用于从所述导体提取电压信号的导线;容纳所述电路板的盖体;设于所述盖体上的第一固定装置;以及与所述第一固定装置组合固定的第二固定装置,其中,所述导体安装于所述第一固定装置和第二固定装置之间。(A current measuring device for measuring a current, comprising: a conductor through which current flows; a circuit board including a wire for extracting a voltage signal from the conductor; a cover body accommodating the circuit board; the first fixing device is arranged on the cover body; and a second fixture fixed in combination with the first fixture, wherein the conductor is mounted between the first fixture and the second fixture.)
1. A current measuring device for measuring a current, comprising:
a conductor through which current flows;
a circuit board including a conductor for extracting a voltage signal from the conductor;
a cover body accommodating the circuit board;
the first fixing device is arranged on the cover body; and
a second fixing device fixed in combination with the first fixing device,
wherein the conductor is mounted between the first and second fixtures.
2. The amperometric device of claim 1, wherein the circuit board is disposed upright relative to the conductor.
3. The amperometric device of claim 1, wherein the circuit board is mounted in the plane of the conductor.
4. The current measuring apparatus according to claim 1,
a pair of terminals are vertically arranged on the conductor,
the leads of the circuit board are connected to the pair of terminals.
5. The amperometric device of claim 1, wherein a bus bar is disposed between the first fixture and the second fixture.
Technical Field
The present invention relates to a current measuring apparatus.
Background
In a structure in which a circuit board formed with a current detection circuit is fixed to a shunt resistor for current detection, a simpler connection structure is required. Further, although devices such as an insulated amplifier may be mounted on the circuit board, miniaturization is still required.
For example,
Disclosure of Invention
Problems to be solved by the invention
For example, a circuit board incorporating the temperature detection circuit as described above sometimes needs to be provided with electronic devices for processing detection signals, such as a microcomputer and an amplifier.
However, the conventional structure has a problem that the size of the device becomes large as a whole after the electronic device is mounted on the circuit board.
The present invention aims to reduce the size of a current measuring apparatus and to make electronic devices easier to mount in the current measuring apparatus.
Means for solving the problems
According to an aspect of the present invention, there is provided a current measuring device for measuring a current, comprising: a conductor through which current flows; a circuit board including a wire for extracting a voltage signal from the conductor; a cover body accommodating the circuit board; the first fixing device is arranged on the cover body; and a second fixture fixed in combination with the first fixture, wherein the conductor is mounted between the first fixture and the second fixture.
According to the above current measuring device, the circuit board can be integrally fixed to the conductor along with the cover.
The circuit board is preferably arranged upright relative to the conductor. The circuit board can be installed in the surface range of the conductor, so that the occupied area during installation can be reduced.
The conductor may be provided with a pair of vertically arranged terminals to which the lead wires of the circuit board may be connected.
In addition, a bus bar may be disposed between the first fixing device and the second fixing device.
The present specification includes the disclosure of japanese patent application No. 2017-130591, which is the basis for priority of the present application.
Effects of the invention
The size of the current measuring device can be reduced by the invention.
Drawings
Fig. 1 is a perspective view showing an exemplary external configuration of a current measuring device according to a first embodiment of the present invention.
Fig. 2 is a perspective view of the current measuring apparatus of fig. 1 showing an exemplary external appearance in which an internal structure including a circuit board is visible by detaching an inner case from an outer case.
Fig. 3 is a perspective view of an exemplary external structure including an inner case from which the circuit board of fig. 2 is removed.
Fig. 4A is a front view of a structure in which a shunt resistor is mounted on a case.
Fig. 4B is a view showing a mounting structure between the circuit board and the shunt resistor accommodated in the accommodating structure on the housing.
Fig. 4C is a circuit diagram of an exemplary structure including a circuit board and a shunt resistor current sensing module.
Fig. 5 is a perspective view showing a detailed example of the structure of the shunt resistor, and the positional relationship when the housing is mounted is also shown.
Fig. 6 is a perspective view of an exemplary mounting step of the shunt resistor on the case, which is a state view before the shunt resistor is mounted on the case, and a view of the bottom surface of the case when viewed from an oblique direction.
Fig. 7 is a perspective view of an exemplary mounting step of the shunt resistor on the case, which is a state view after the shunt resistor is mounted on the case, and a view of the bottom surface of the case when viewed from an oblique direction.
Fig. 8 is a perspective view of an exemplary mounting step of the shunt resistor on the case, which is a state view after the shunt resistor has been mounted on the case and fixed with a nut, and a view of the bottom surface of the case when viewed obliquely in a state where the current detection device is mounted.
Fig. 9 is a perspective view showing an exemplary external configuration of a current measuring device according to a second embodiment of the present invention.
Fig. 10 is a perspective view showing an exemplary external configuration of the current detection device after a bus bar is further mounted on the structure shown in fig. 9.
Fig. 11 is an oblique view of the structure of fig. 10 viewed from the bottom side.
Fig. 12 is an oblique view of the structure shown in fig. 10 and 11, viewed from the side, and is an oblique view in which the inside of the housing becomes visible by removing the outer housing.
Detailed Description
Hereinafter, a current measuring apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. The shunt resistor and the circuit board are combined into a body portion, and the body portion is mounted on the case, whereby the current measuring apparatus can be formed.
In addition, in this specification, the electrode-resistance material-electrode arrangement direction of the resistor is referred to as a longitudinal direction, and a direction intersecting the longitudinal direction is referred to as a width direction. In addition, a direction perpendicular to the resistor surface is referred to as a vertical direction. The same definition is used for the structures of the circuit board and the like.
First, a current measuring device according to a first embodiment of the present invention will be described.
Fig. 1 is a perspective view showing an exemplary external configuration of a current measuring device according to the present embodiment. Fig. 2 is a perspective view showing an exemplary external appearance of the current measuring apparatus of fig. 1 in a state where an internal structure including a circuit board is visible by detaching an
As shown in fig. 1 to 3, the current measuring apparatus a of the present embodiment includes
Therefore, the current measuring device a of the present embodiment is provided with a fixing device for fixing a conductor (conductor for current detection) such as a shunt resistor in the
Further, as shown in fig. 3, the
Further, as shown in fig. 1 and 2, the
Hereinafter, a connection method between the
Fig. 4A is a front view of a structure in which the
The
The
As shown in fig. 4A,
As shown in fig. 4A, the
Alternatively, nuts may be fixed to the fixing
As shown in fig. 4B, the
Further, as described above, the
Further, the longitudinal direction of the
The shape of the
The current measuring device a is used to detect parameters such as a state of charge of the battery by detecting a current flowing into the battery, for example. The
Fig. 4C is a functional block diagram illustrating an exemplary structure of the current detection device (current detection module B).
As shown in fig. 4B and 4C, the
The
Hereinafter, the connection structure will be described with further reference to fig. 5.
In addition, the
The
By providing other components that are less susceptible to heat in regions other than the upper half of the
Further, among the electronic devices of the current detection module B forming the
Fig. 5 is a perspective view showing a detailed example structure of the
The first and
Fig. 6 to 8 are oblique views illustrating an example mounting step of the
Fig. 6 is a state view before the
As shown in fig. 6, the bottom surface side of the
The current detection device of the present embodiment can fix the
By providing the fixing screw inside the
Hereinafter, a current detection device B according to a second embodiment of the present invention will be described.
Fig. 9 is a perspective view showing an exemplary external configuration of the current detection device according to the present embodiment. Fig. 10 is a perspective view showing an exemplary external configuration of the current detection device shown in fig. 9 after a bus bar is mounted thereon. Fig. 11 is an oblique view of the structure of fig. 10 viewed from the bottom side. Fig. 12 is a perspective view of the current measuring apparatus according to the present embodiment, specifically, an exemplary external structure in which the internal structure including the circuit board is visible by detaching the
In the structure shown in fig. 9, the length of the
As shown in fig. 10, 11, and 12, the
According to the present embodiment, the
Although the above-described embodiments have been described taking as an example a structure in which the
As described above, with the current detection device of the present embodiment, it is possible to reduce the size of the current measurement device, making it difficult to cause an obstacle even if it is mounted on a battery, and making it easy to mount an electronic component on the current measurement device. The housing can protect the automobile, so that the automobile can be mounted on equipment such as an automobile due to strong impact resistance.
The above-described embodiments are not limited to the various configurations shown in the drawings, and may be appropriately modified within a range in which the effects of the present invention can be achieved. The present invention can be carried out with appropriate modifications without departing from the scope of the object of the present invention.
Industrial applicability
The invention can be used for current detection devices.
Reference numerals
A … … current measuring device
1 … … resistor (conductor)
3 … … resistive material
5a, 5b … … first and second electrodes (a pair of terminal structures)
11a, 11b … … screw (bolt)
17a, 17b … … voltage detection terminal
21 … … casing (cover)
31 … … circuit board
41 … … temperature detection unit
45, 47 … … conductor
53, 55, 57 … … electronic device
All publications, patents and patent applications cited in this specification are herein incorporated in their entirety by this reference.
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