JP3172629B2 - Current / voltage detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current / voltage detecting device for detecting a current and a voltage of a conductor, for example, in a branch junction box of a vehicle.

[0002]

2. Description of the Related Art For example, in a vehicle such as an electric vehicle that uses a battery as a power source, it is essential to monitor the state of the battery in order to ensure normal operation. As one of the measures, it is necessary to measure abnormal voltage drop and voltage rise due to battery abnormality. In particular, for lead batteries,
It is said that if the battery voltage is discharged to a certain level or less (called the end voltage), the life of the battery will be extremely shortened.
You need to charge before that. The charging of the battery is usually performed with a constant current, but the completion of the charging is determined when the battery voltage becomes a constant voltage, so that the battery voltage needs to be measured. Further, in a vehicle such as an electric vehicle using a battery as a power source, it is indispensable to know the remaining capacity of the battery in order to determine the possible travel distance. As a means for that, there is a method of accumulating current consumption and subtracting it from the initial capacity to obtain a remaining capacity. When the battery is replaced, the initial capacity is not known, so it is necessary to measure the battery voltage to measure the initial capacity.

FIGS. 6 and 7 show the structure of a conventional current detecting device. As shown in the drawing, the current detecting device has a rectangular main housing 1, and a cylindrical body 2 is provided upright at a bottom portion in the main housing 1, and a main housing 1 is provided in the cylindrical body 2. Is provided. A through conductor 4 formed of a bus bar through which a current to be measured flows passes through the through hole 3 from below the main housing 1 upward, and an upper end thereof protrudes above the main housing 1. At the upper end of the penetrating conductor 4 protruding above the main housing 1, the end of a conductor 5 made of another bus bar is overlapped, and a bolt 8 and a nut 9 having a special head are provided via washers 6 and 7. Has been concluded. A C-shaped magnetic core 10 is arranged on the outer periphery of the cylindrical body 2 in the main housing 1,
A magneto-electric conversion element 11 composed of a Hall element is disposed in a gap 10a of the C-shaped magnetic core 10. The magneto-electric transducer 11 is mounted on the circuit board 1 in the main housing 1.
2 stands. The circuit board 12 includes the amplifier circuit 1
3 and the like, and a connector 14 for extracting a detection output and supplying power to the amplifier circuit 13 is provided.
Although not shown, the amplifying circuit 13 is provided by the magneto-electric conversion element 11.
Printed wiring is provided to the connector 14 via the. Reference numeral 15 denotes a temporary fixing member for temporarily fixing the magnetic core 10. These magnetic core 10 and magneto-electric conversion element 1
1, the circuit board 12, the amplifier circuit 1 3, connector 14, the current detection unit 16 of the non-contact by the temporary fixing member 15 or the like is formed.

[0004]

However, in such a conventional current detecting device, the through conductor 4 and another conductor 5 are not provided.
The connection between the to, because of the use of special bolt 8 with a groove 17 of the radial to Article 7 on the head, there is a problem in that the fastening operation can not be performed and does not use a special driver. In the fastening operation using the bolt 8 and the nut 9, it is necessary to turn the bolt 8 or the nut 9 several times, and there is a problem that the fastening is troublesome. Furthermore, the work of a hole 4 A for passing a bolt 8 to the through conductor is required, steps there is such a problem.

Further, in the conventional current detecting device, only the current can be detected, and if it is necessary to detect the voltage, a voltage detecting device must be separately provided, which further increases the labor and cost. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a current / voltage detecting device capable of detecting both a current and a voltage, and of simply and efficiently connecting through conductors without using a special tool.

[0007]

The configuration of the present invention that achieves the above-mentioned object will be described below.

[0008] The current / voltage detecting device according to claim 1 is
First and second through conductors formed by a bus bar and formed linearly and through which positive and negative currents flow are provided through the main housing, and the first and second through conductors are provided in the main housing.
A current detection unit for detecting a current to be measured flowing through one of the through conductors and a voltage detection unit for detecting a potential difference between the first and second through conductors; Connector housings are respectively provided on both sides of the main housing through which conductors penetrate, and ends of the first and second through conductors are arranged as connector terminals in these connector housings. The connector terminals
Each connector for connecting the second through conductor to the counter conductor is configured.

[0009]

[0010]

With the structure of the current / voltage detecting device according to the first aspect, it is possible to detect the current and the voltage together with one device. For this reason, the number of devices is reduced to one, so that the cost can be reduced and the number of connection work steps can be reduced. Further, the through conductor can be connected to the mating conductor by connector connection. Therefore, the connection of the through conductor can be easily and efficiently performed without using a special tool as in the related art.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. Members corresponding to those in FIGS. 6 and 7 described above are denoted by the same reference numerals. 1 to 3
1 shows an embodiment of a current / voltage detection device according to the present invention. The current / voltage detection device 18 of this embodiment is
First and second through conductors 4 and 19 through which positive and negative currents flow are provided through the main housing 1 in a state of being parallel to each other. The circuit board 12 is arranged on the first and second through conductors 4 and 19. In the middle of the first and second through conductors 4 and 19 in the longitudinal direction, connection protrusions 20 and 21 for electrically connecting to the circuit board 12 are provided.

The circuit board 12 corresponding to the first through conductor 4
Is mounted with a magneto-electric conversion element 11 composed of a Hall element. The C-shaped magnetic core 10 has a gap 10
The circuit board 12 in which the magneto-electric conversion element 11 exists is inserted into the gap 10a such that the magneto-electric conversion element 11 formed of a Hall element exists in a. The circuit board 12 has an amplifier circuit 13 mounted thereon, and further has a connector 14 for extracting a detection output and supplying power to the amplifier circuit 13. Although not shown, the connector 1 is supplied from the magneto-electric conversion element 11 through the amplification circuit 13.
4 are provided. A non-contact current detection unit 16 is constituted by the magnetic core 10, the magneto-electric conversion element 11, the circuit board 12, the amplifier circuit 13, and the like. The circuit board 12 is provided with a voltage detection circuit 22 for detecting a potential difference between the connection protrusions 20 and 21 of the first and second through conductors 4 and 19. The above-described connector 14 also serves as a connector for extracting a detection output of the voltage detection circuit 22 and supplying power to the voltage detection circuit 22. A voltage detection unit 23 is constituted by the connection protrusions 20 and 21 and the voltage detection circuit 22.

On the front and rear surfaces of the main housing 1 through which the first and second through conductors 4 and 19 pass, connector housings 24 and 25 of the first through conductor 4 and connector housings of the second through conductor 19 are provided. 26 and 27 are provided, respectively. In the connector housings 24, 25, both ends of the first through conductor 4 are arranged as connector terminals 4a, 4b. In the connector housings 26 and 27, the second
Are disposed as connector terminals 19a and 19b. These connector housings 24,
25 and the connector terminals 4a and 4b therein, the connectors 28 and 2 for connecting the first through conductor 4 to other conductors.
9 are configured. The connector housing 26,
27 and the connector terminals 19a and 19b therein constitute connectors 30 and 31 for connecting the second through conductor 19 to other conductors. The connector 14 is exposed on the upper surface of the main housing 1.

Therefore, such a current / voltage detecting device 1
By using the eight connectors 28, 29, 30, and 31, the current / voltage detector 18 can be easily and efficiently connected to a connector of a branch connection box (not shown). Therefore, the connecting operation can be performed without using a special tool as in the related art. The connectors 28, 2 provided in the main housing 1
The positions of 9, 30, 31 are not limited to the above embodiment, and may be provided at any position of the main housing 1 such as the upper surface and the lower surface of the main housing 1 as needed. The non-contact current detection unit 16 may be configured by a zero-flux type circuit as shown in FIG. 4, for example, in addition to the above-described one. In the current detecting unit 16 of the zero flux type, a C-shaped magnetic core 10 is disposed on the outer periphery of a through conductor 4 formed of a bus bar, and a magnetic element formed of a Hall element is provided in a gap 10 a of the C-shaped magnetic core 10. An electric conversion element 11 is arranged,
The point that connector terminals 4a and 4b of a connector for connecting to a mating conductor are provided at both ends of the through conductor 4 is as follows.
This is the same as the embodiment shown in FIGS.

The zero-flux type current detecting unit 16 absorbs a magnetic flux generated by a current to be measured flowing through the through conductor 4 penetrating the magnetic core 10 by the magnetic core 10 and removes the magnetic flux in the magnetic core 10. The voltage signal is converted into a voltage signal by a magneto-electric conversion element 11 composed of a Hall element, the voltage signal is amplified by an amplifier circuit 32, and the amplified output of the amplifier circuit 32 is fed back to a feedback coil 3
3, the magnetic core 10 is driven by the current to be measured.
Generates a magnetic flux in the direction opposite to the direction of the magnetic flux passing inside,
The magnetic flux generated by the measured current and the magnetic flux generated from the feedback coil 33 by the magneto-electric conversion element 11 by sufficiently increasing the gain of the feedback circuit including the magnetic core 10, the magneto-electric conversion element 11, the amplifier circuit 32, and the feedback coil 33. The current to be measured is measured by measuring the current flowing through the feedback coil 33 with the measuring device 34 when these magnetic fluxes are balanced, that is, at the time of zero crossing. Even in such a structure, the connector connection
The same effect as the embodiment shown in FIGS. 1 to 3 can be obtained.
You.

[0016]

[0017]

As described above, according to the current / voltage detecting device of the present invention, the following effects can be obtained.

According to the current / voltage detection device of the first aspect, both the current and the voltage can be detected by one device, and therefore, the number of devices is reduced to one, so that the cost and the connection work can be reduced. The number of steps can be reduced.

The through conductor has a structure in which the through conductor is connected to the mating conductor by connector connection.
It can be easily and efficiently performed without using a special tool as in the related art.

[0020]

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an internal configuration of an embodiment of a current detection device according to the present invention.

FIG. 2 is a perspective view showing an internal configuration of one embodiment of the current detection device of the present invention.

FIG. 3 is a perspective view showing the appearance of one embodiment of the current detecting device of the present invention.

FIG. 4 is a circuit diagram showing another example of the current detection unit used in the present invention.

FIG. 5 is a perspective view of a conventional current detection device.

6 is an exploded perspective view of the conventional current detecting device shown in FIG.
is there.

[Explanation of symbols]

1 …………………………………………………………………………………………………………………………………………………………………………………. 4b …………………………… Connector terminal 10 ………………………………………… Magnetic core 10a ………… …………………… Gap 11 …………………………………… Magneto-electric conversion element 12 ……………… ……………………… Circuit board 13, 32 ………………………………… Amplification circuit 14,28,29,30,31 ……………. …… Connector 16 …………………………………………………………………… Contactless current detection unit 18 …………………………………………………… … Current
Voltage detection device 19 second through conductors 19a, 19b ... connector terminals 20 , 21 ...................................................... Connection protrusion 22 ........................ Voltage detection circuit 23 ...... ………………………………… Voltage detection unit 24,25,26,27 …………………………… Connector housing 33 ………………………. ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ··················· ……………………………………………………………… Primary winding

Claims (1)

(57) [Claims] 1. A first and a second through conductor formed by a bus bar and formed in a straight line and through which positive and negative currents flow is provided through a main housing, and the first and second through conductors are provided in the main housing. A current detection unit for detecting a current to be measured flowing through one of the two through conductors and a voltage detection unit for detecting a potential difference between the first and second through conductors; Connector housings are respectively provided on both sides of the main housing through which the through conductor penetrates, and the ends of the first and second through conductors are arranged as connector terminals in these connector housings. A current / voltage detecting device, wherein each connector for connecting the first and second through conductors to a mating conductor is constituted by an inner connector terminal.