JPH07140179A - Current/voltage detector - Google Patents

Abstract

PURPOSE:To detect both current and voltage while facilitating the connection of a through conductor with high efficiency without requiring any special tool. CONSTITUTION:Through conductors 4, 19 for passing positive and negative currents, respectively, are provided while penetrating a main housing. A noncontact current detection unit 16 for detecting current flowing through the through conductor 4 is disposed in the main housing. A voltage detection unit 23 for detecting the potential difference between the through conductors 4, 19 is also disposed in the main housing. Connector housings are provided on the opposite sides of the main housing and the end parts of the through conductors 4, 19, i.e., the connector terminals 4a, 4b, 19a, 19b, are disposed in the connector housings thus constituting connectors 29, 31 for connecting the through conductors 4, 19 with counterpart conductors.

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 the current and voltage of a conductor, for example, in a vehicle junction box.

[0002]

2. Description of the Related Art In a vehicle powered by a battery such as an electric vehicle, it is essential to monitor the state of the battery in order to ensure normal operation. For this purpose, it is necessary to measure abnormal voltage drop and voltage rise due to battery abnormality. Especially with lead batteries,
It is said that if the battery voltage is discharged to a certain level or less (termed cutoff voltage), the battery life will be extremely shortened. Therefore, always monitor the battery voltage,
It needs to be charged before that. The battery is usually charged with a constant current, but since the completion of charging is determined when the battery voltage becomes a constant voltage, it is necessary to measure the battery voltage. Further, in a vehicle such as an electric vehicle that uses a battery as a power source, it is indispensable to know the remaining capacity of the battery in order to determine the travelable distance. As a means for this, there is a method of accumulating consumption current and subtracting it from the initial capacity to obtain the remaining capacity. When the battery is replaced, the initial capacity is unknown, so it is necessary to measure the battery voltage to measure the initial capacity.

6 and 7 show the configuration of a conventional current detecting device. As shown in the figure, the current detection device has a rectangular main housing 1, a cylinder 2 is vertically installed at a bottom portion of the main housing 1, and the main housing 1 is provided in the cylinder 2. A rectangular through hole 3 penetrating through is provided. A through conductor 4 formed of a bus bar through which a current to be measured flows is penetrated through the through hole 3 from below the main housing 1 upward, and an upper end thereof projects above the main housing 1. On the upper end of the penetrating conductor 4 protruding above the main housing 1, the end of the conductor 5 made of another bus bar is superposed, and a bolt 8 and a nut 9 having a special head are provided via washers 6 and 7. It 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 magnetoelectric conversion element 11 composed of a Hall element is arranged in the void portion 10a of the C-shaped magnetic core 10. The magneto-electric conversion element 11 includes a circuit board 1 in the main housing 1.
It is set up in 2. The circuit board 12 includes an amplifier circuit 1
3 and the like are mounted, and a connector 14 for taking out a detection output and supplying power to the amplifier circuit 13 is further provided.
Although not shown, the magneto-electric conversion element 11 causes the amplifier circuit 13 to
A printed wiring is provided to reach the connector 14 via the. Reference numeral 15 is a temporary fixing member for temporarily fixing the magnetic core 10. These magnetic core 10 and magnetoelectric conversion element 1
1, circuit board 12, amplifier circuit 13, b, connector 14,
Non-contact current detection unit 16 by temporary fixing member 15 and the like
Is configured.

[0004]

However, in such a conventional current detection device, the through conductor 4 and the other conductor 5 are provided.
Since a special bolt 8 having a radial groove 17 in the head is used for connection with the head, the fastening work cannot be performed unless a special screwdriver is used. In the fastening work with 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. Further, there is a problem in that it is necessary to make a hole 4a for passing the bolt 8 in the through conductor, which requires a lot of man-hours.

Further, in the conventional current detecting device, when only the current can be detected and the voltage also needs to be detected, a separate voltage detecting device must be provided, which is more troublesome and costly. .

An object of the present invention is to provide a current / voltage detecting device which can detect both current and voltage and can easily and efficiently connect through conductors without using a special tool.

[0007]

The structure of the present invention which achieves the above-mentioned object will be described as follows.

The current / voltage detector according to claim 1 is
First and second through conductors, through which positive and negative currents flow, are provided so as to penetrate the main housing, and a measured current flowing through one of the first and second through conductors is detected in the main housing. A current detection unit and a voltage detection unit for detecting a potential difference between the first and second penetrating conductors are provided, and parts on both sides of the main housing through which the first and second penetrating conductors penetrate are provided. Connector housings are respectively provided, and the first and second connector housings are provided in the connector housings.
End portions of the penetrating conductors are arranged as connector terminals, and the connector housing and the connector terminals therein form respective connectors for connecting the first and second penetrating conductors to the mating conductors. To do.

According to another aspect of the current / voltage detecting device,
A through conductor through which a current to be measured flows is provided so as to penetrate through the main housing, and in the main housing, a magnetic core through which a magnetic flux generated by the current to be measured passes a current to be measured flowing through the through conductor and the inside of the magnetic core. Magnetic-electric conversion element for converting the magnetic flux of the magnetic flux into an electric signal, an amplifying circuit for amplifying the electric signal so that the electric signal sequentially increases, and the sequentially increasing electric signal is passed to generate a magnetic flux in the opposite direction to the magnetic flux to the magnetic core. A zero flux type current detection unit using a feedback coil that generates until both magnetic fluxes are balanced is provided, and based on the measured current that is further wound around the magnetic core and flows through the through conductor in the main housing. A voltage detection unit having a primary winding for detecting a voltage and a resistor connected in series to the primary winding is provided, and portions on both sides of the main housing through which the through conductor passes. Are provided with respective connector housings, and the end portions of the through conductors are arranged as connector terminals in the connector housings, and the connector housing and the connector terminals therein form the respective connectors for connecting the through conductors to the mating conductors. It is characterized by being.

[0010]

With the structure of the current / voltage detecting device according to the first and second aspects, it is possible to detect the current and voltage together with one device. Therefore, the number of devices is reduced to one, and the cost can be reduced and the connection work man-hour can be reduced. The through conductor can be connected to the mating conductor by connector connection. Therefore, it is possible to easily and efficiently connect the through conductors without using a special tool as in the conventional case. Particularly, when the structure of the current / voltage detecting device according to claim 2 is adopted, the current and the voltage can be detected from one through conductor, and the structure can be further simplified as compared with the current / voltage detecting device according to claim 1. You can

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. The members corresponding to those in FIGS. 6 and 7 described above are designated by the same reference numerals. 1 to 3 are
1 shows an embodiment of a current / voltage detecting device according to the present invention. The current / voltage detection device 18 of this embodiment is
First and second penetrating conductors 4, 19 through which positive and negative currents flow are provided so as to penetrate 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. Connection protrusions 20 and 21 for electrically connecting to the circuit board 12 are provided midway in the longitudinal direction of the first and second through conductors 4 and 19.

The circuit board 12 corresponding to the first through conductor 4
A magneto-electric conversion element 11 including a Hall element is mounted on the. The C-shaped magnetic core 10 has a space 10
The circuit board 12 having the magneto-electric conversion element 11 is inserted in the space 10a so that the magneto-electric conversion element 11 made of a Hall element exists in a. Further, the circuit board 12 is provided with an amplifier circuit 13, and is further provided with a connector 14 for taking out a detection output and supplying power to the amplifier circuit 13. Although not shown, the connector 1 is connected from the magnetoelectric conversion element 11 via the amplifier circuit 13.
Printed wirings up to 4 are provided. The magnetic core 10, the magnetoelectric conversion element 11, the circuit board 12, the amplifier circuit 13 and the like constitute a non-contact current detection unit 16. Further, the circuit board 12 is equipped 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 connector 14 described above also serves as a connector for taking out the detection output of the voltage detection circuit 22 and supplying power to the voltage detection circuit 22. The connection protrusions 20, 21 and the voltage detection circuit 22 form a voltage detection unit 23.

Connector housings 24 and 25 for the first through conductor 4 and a connector housing for the second through conductor 19 are provided on the front and rear surfaces of the main housing 1 through which the first and second through conductors 4 and 19 penetrate. 26 and 27 are provided, respectively. Both ends of the first penetrating conductor 4 are arranged as connector terminals 4a and 4b in the connector housings 24 and 25, respectively. In the connector housings 26 and 27, the second
Both ends of the through conductor 19 are arranged as connector terminals 19a and 19b. These connector housings 24,
25 and the connector terminals 4a and 4b therein, connectors 28 and 2 for connecting the first through conductor 4 to other conductors.
9 are configured. In addition, the connector housing 26,
27 and the connector terminals 19a and 19b therein form 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 connectors 28, 29, 30, 31 of No. 8, the current / voltage detection device 18 can be easily and efficiently connected to the connector of the branch connection box (not shown). Therefore, the connection work can be performed without using a special tool as in the conventional case. The connectors 28, 2 provided on the main housing 1
The positions of 9, 30, and 31 are not limited to those in the above-described embodiment, but 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 required. Further, the non-contact current detection unit 16 may be configured by, for example, a zero-flux type circuit as shown in FIG. In this zero-flux type current detection unit 16, a C-shaped magnetic core 10 is arranged on the outer periphery of a through conductor 4 formed of a bus bar, and a magnetic space formed by a Hall element is provided in a void portion 10a of the C-shaped magnetic core 10. The electric conversion element 11 is arranged,
Connector terminals 4a and 4b of a connector for connecting to a mating conductor are provided at both ends of the through conductor 4,
This is similar to the embodiment shown in FIGS.

The zero-flux type current detection unit 16 absorbs the magnetic flux generated by the measured current flowing through the penetrating conductor 4 penetrating the magnetic core 10 by the magnetic core 10, and the magnetic flux inside the magnetic core 10 is absorbed. The magneto-electric conversion element 11 formed of a Hall element converts the voltage signal into a voltage signal, the amplification circuit 32 amplifies the voltage signal, and the amplified output of the amplification circuit 32 is wound around the magnetic core 10 in the feedback coil 3.
3 and the magnetic core 10
Generate a magnetic flux in the direction opposite to the direction of the magnetic flux passing through the inside,
The magnetic flux generated by the measured current and the magnetic flux generated by the feedback coil 33 by the magnetoelectric conversion element 11 by sufficiently increasing the gain of the feedback circuit including the magnetic core 10, the magnetoelectric conversion element 11, the amplifier circuit 32, and the feedback coil 33. Are balanced, and the current flowing through the feedback coil 33 is measured by the measuring device 34 when the magnetic fluxes are balanced, that is, at the time of zero crossing, and the current to be measured is measured.

Even with such a structure, the same effect as that of the embodiment shown in FIGS. 1 to 3 can be obtained by connecting the connector. In addition to the normal circuit, the voltage detection circuit 22 uses a zero-flux type circuit as shown in FIG. 5 to connect the known resistors 35a and 35b to the primary winding 36 of the magnetic core 10. It has a structure for converting the current flowing through the primary winding 36 into a voltage. In this zero-flux circuit, the parts corresponding to those in FIG. 4 are designated by the same reference numerals. In particular, when the current / voltage detecting device having such a structure is used, the current and voltage can be detected from one through conductor 4, and the structure can be further simplified as compared with the current / voltage detecting device shown in FIGS. You can

[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 and second aspects, one device can detect both the current and the voltage. Therefore, the number of devices is one, and the cost is reduced. It is possible to reduce the number of connection work steps.

Since the through conductor has a structure in which it is connected to the mating conductor by connector connection, the connection of the through conductor is
It can be performed easily and efficiently without using a special tool as in the past.

Particularly, according to the current / voltage detecting device of the second aspect, the current and the voltage can be detected from one through conductor, and the structure is further simplified as compared with the current / voltage detecting device of the first aspect. can do.

[Brief description of drawings]

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

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

FIG. 3 is a perspective view showing the external appearance of an embodiment of the current detection 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 circuit diagram showing another example of a current detection unit and a voltage detection unit used in the present invention.

FIG. 6 is a perspective view of a conventional current detection device.

FIG. 7 is an exploded perspective view of the conventional current detection device shown in FIG.

[Explanation of symbols]

1 ………………………………………………………… Main housing 4 …………………………………………………… Penetration conductor 4a, 4b …………………………………………………… Connector terminal 10 …………………………………………………… Magnetic core 10a ……………… ……………………………………… Void 11 …………………………………………………… Magnetoelectric conversion element 12 ……………………… ………………………………… Circuit board 13,32 ………………………………………… Amplifier circuit 14,28,29,30,31 ……………… ...... Connector 16 ………………………………………………………… Non-contact current detection unit 18 …………………………………………………… ... current
Voltage detection device 19 …………………………………………………… Second penetration conductor 19a, 19b ……………………………………… Connector terminal 20 , 21 …………………………………………………… Connection protrusion 22 …………………………………………………… Voltage detection circuit 23 ………… ……………………………………………… Voltage detection unit 24, 25, 26, 27 ……………………………… Connector housing 33 ……………………………… ………………………… Return coil 34 …………………………………………………… Measuring instrument 35a, 35b …………………………………… ……… Resistance 36 …………………………………………………… Primary winding

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[Procedure amendment]

[Submission date] March 9, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

6 and 7 show the configuration of a conventional current detecting device. As shown in the figure, the current detection device has a rectangular main housing 1, a cylinder 2 is vertically installed at a bottom portion of the main housing 1, and the main housing 1 is provided in the cylinder 2. A rectangular through hole 3 penetrating through is provided. A through conductor 4 formed of a bus bar through which a current to be measured flows is penetrated through the through hole 3 from below the main housing 1 upward, and an upper end thereof projects above the main housing 1. On the upper end of the penetrating conductor 4 protruding above the main housing 1, the end of the conductor 5 made of another bus bar is superposed, and a bolt 8 and a nut 9 having a special head are provided via washers 6 and 7. It 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 magnetoelectric conversion element 11 composed of a Hall element is arranged in the void portion 10a of the C-shaped magnetic core 10. The magneto-electric conversion element 11 includes a circuit board 1 in the main housing 1.
It is set up in 2. The circuit board 12 includes an amplifier circuit 1
3 and the like are mounted, and a connector 14 for taking out a detection output and supplying power to the amplifier circuit 13 is further provided.
Although not shown, the magneto-electric conversion element 11 causes the amplifier circuit 13 to
A printed wiring is provided to reach the connector 14 via the. Reference numeral 15 is a temporary fixing member for temporarily fixing the magnetic core 10. These magnetic core 10 and magnetoelectric 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.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

However, in such a conventional current detection device, the through conductor 4 and the other conductor 5 are 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 work with 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.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

According to another aspect of the current / voltage detecting device,
A through conductor through which a current to be measured flows is provided so as to penetrate through the main housing, and in the main housing, a magnetic core through which a magnetic flux generated by the current to be measured passes a current to be measured flowing through the through conductor and the inside of the magnetic core. Magnetic-electric conversion element for converting the magnetic flux of the magnetic flux into an electric signal, an amplifying circuit for amplifying the electric signal so that the electric signal sequentially increases, and the sequentially increasing electric signal is passed to generate a magnetic flux in the opposite direction to the magnetic flux to the magnetic core. current detecting unit of zero flux method using a feedback coil both flux causes generation until equilibrium is provided, in the thereto a primary winding wound around a magnetic core the main housing
Potential difference between the through conductors having a resistance connected in series
A voltage detection unit is provided, connector housings are respectively provided on both sides of the main housing through which the through conductor penetrates, and end portions of the through conductor are arranged as connector terminals in these connector housings. The connector housing and the connector terminals therein form each connector for connecting the through conductor to the mating conductor.

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (2)

[Claims] 1. A first and a second penetrating conductor, through which positive and negative currents flow, are provided so as to penetrate the main housing, and in the main housing, an object to flow to one of the first and the second penetrating conductors is provided. A current detection unit for detecting a measurement current and the first and second
And a voltage detection unit for detecting the potential difference between the through conductors, and connector housings are provided on both sides of the main housing through which the first and second through conductors pass, respectively. End portions of the first and second through conductors are arranged therein as connector terminals, and each connector for connecting the first and second through conductors to the mating conductor is formed by these connector housings and the connector terminals therein. A current / voltage detector characterized in that it is configured. 2. A magnetic core in which a through conductor through which a current to be measured flows is provided so as to penetrate through a main housing, and a current to be measured flowing through the through conductor passes through a magnetic flux generated by the current to be measured in the main housing. A magnetic-electric conversion element for converting the magnetic flux in the magnetic core into an electric signal; an amplifier circuit for amplifying the electric signal so that the electric signal sequentially increases; and the electric signal that sequentially increases to pass the magnetic flux to the magnetic core. A zero-flux type current detection unit using a feedback coil that generates reverse magnetic flux until both magnetic fluxes are balanced is provided, and is further wound in the main housing around the magnetic core and flows into the through conductor. The main housing is provided with a voltage detection unit having a primary winding that detects a voltage based on a current to be measured and a resistor connected in series to the primary winding, and the through conductor passes through the main housing. Connector housings are provided on both sides of the connector housing, and the end portions of the through conductors are arranged as connector terminals in the connector housings, and the through conductors are connected to the mating conductors by the connector housings and the connector terminals therein. A current / voltage detecting device characterized in that each connector is configured.