WO2014065484A1

WO2014065484A1 - Device for automatically cutting off high-current power

Info

Publication number: WO2014065484A1
Application number: PCT/KR2013/005415
Authority: WO
Inventors: 김춘식; 김성준; 박종민; 오영석; 이희성; 최성진
Original assignee: 태성전장주식회사
Priority date: 2012-10-22
Filing date: 2013-06-19
Publication date: 2014-05-01
Also published as: KR101257923B1

Abstract

The present invention relates to an automatic high-current power cut-off device for cutting off power to be supplied to various kinds of electric/electronic sub assemblies connected to a battery in a vehicle when a collision or an overcurrent of the vehicle occurs. The automatic high-current power cut-off device comprises: a relay; a battery sensor; and a control circuit. The relay comprises: a first terminal connected to a vehicle load; a second terminal connected to a (+) pole of the battery; a third terminal connected to a normal load; and a connection terminal for connecting electricity between the first terminal and the second terminal, the battery sensor is located between the second terminal and the third terminal so as to connect the second terminal and the third terminal, and the relay, the battery sensor and the control circuit are assembled in one body.

Description

Large current power automatic breaker

The present invention relates to a large current automatic power cut-off device for cutting off the power supplied from the battery in the event of a vehicle crash or overcurrent.

In general, the electric device of a vehicle is divided into an engine electric device and a chassis electric device. Electric devices, which are powered by a generator and a battery powered by an engine, are used in various electric devices.

The electronics have built-in electrical wiring for operation, enabling the engine to ignite, start and charge, as well as operate lighting, security and air conditioning. As the number of electronic devices increases, fuses are used to configure the above electronic devices, protect circuits, and cut off overload.

In addition, the amperage measuring device is used for effective power control according to the increase of the electronics.

The current measuring device may be made of an intelligent battery sensor (IBS). The IBS measures the state of charge of the battery, the starting capability, and the internal temperature by calculating a built-in computer chip. It conveys information and status.

The engine computer (ECU) uses the battery information obtained from IBS to control the generator to prevent overcharging of the battery to increase the life of the battery, and to control the generator operation more than necessary to reduce the engine load to improve fuel economy. .

The fuse is designed to prevent excessive current from flowing due to overload of the electronic component. When a current exceeding a specified value flows, the fuse instantly melts and cuts off the circuit, thereby preventing the flow of current.

On the other hand, the conventional high current automatic power cut off device receives a signal from the airbag control unit (ACU) in the event of a car collision, as shown in Figure 1 to cut off the flow of electricity supplied to the start motor and generator to prevent secondary fire It only had the function to do it, and it had to be created separately from IBS, which required a lot of installation space.

On the other hand, when the vehicle is crashed by breaking the circuit using the gunpowder to operate the fuse, there is a problem that can not be reused once used.

According to the present invention, a relay is used to cut off power, and a battery sensor function is added by inserting a shunt resistor into the relay to make the IBS and the relay as one, thereby reducing the overall volume and reducing the installation space.

In addition, by using a mechanical relay that can be reused in the event of a collision or overcurrent of the vehicle can be reused, the power supply is always supplied to the necessary electrical equipment even if the relay is operated by the emergency power terminal.

In order to achieve the above object, a high current automatic power shut-off device according to the present invention includes a relay, a battery sensor, and a control circuit, wherein the relay includes a first terminal connected to a vehicle load, and And a third terminal connected to two terminals and a constant load, and a connection terminal connecting the first terminal and the second terminal, wherein the battery sensor is positioned between the second terminal and the third terminal.

In addition, the relay, the battery sensor, and the control circuit are integrally formed.

According to the present invention, unlike the conventional IBS including the battery sensor and the fuse is formed in a separate space each takes a lot of space inside the vehicle is bulky, by inserting the battery sensor between the terminals of the relay to install the relay and the battery By integrally forming the IBS consisting of the sensor and the control circuit, the volume of the high current automatic power cut-off device is reduced, taking up less space in the vehicle, thereby facilitating installation.

In addition, even if the power supply from the battery to the first terminal is cut off due to an abnormality in the vehicle, the third terminal is always supplied with power. Therefore, the electrical appliances that need to be operated in an emergency are connected to the third terminal. Make it available at all times.

In addition, it can be used semi-permanently because it can be reused when the problem is solved by cutting off the battery power supply using a mechanical relay.

1 is a configuration in which a large current automatic power cut device according to the prior art is used.

Figure 2 is a view showing a large current automatic power cut device of the present invention.

3 is a power connection diagram of a large current automatic power cut device of the present invention.

4 is a view showing a state in which the connection terminal is disconnected by the control circuit in FIG.

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

Figure 2 is a view showing a large current automatic power cut device of the present invention, Figure 3 is a power connection diagram of a large current automatic power cut device. 4 is a view showing a state in which the connection terminal is disconnected by the control circuit in FIG.

Here, when the electric current is supplied from the battery 10 to the electrical equipment that is the load device when the current value is supplied more than the prescribed value, the high current power automatic cutoff device 100 cuts off the power supplied from the battery 10 It not only protects the circuit of the vehicle due to overload, but also cuts off the current in case of collision, thereby preventing secondary fire.

As shown in FIG. 2 and FIG. 3, the automatic high current shutoff device 100 includes a relay 110, a battery sensor 120, and a control circuit 130.

The relay 110 includes a first terminal 111, a second terminal 112, a third terminal 113, and a connecting terminal 114 in the form of a braided wire or a thin plate.

Here, the first terminal 111 is connected to the vehicle load, the second terminal 112 is connected to the (+) pole of the battery, the third terminal 113 is always connected to the load.

In this case, since the first terminal 111 and the second terminal 112 are spaced apart from each other, and the first terminal 111 cannot receive power from the battery, the first terminal 111 and the second terminal 112 are separated from each other. The connecting terminal 114 using a braided wire or a thin plate is installed between the first and

second terminals

111 and 112 to allow power to pass through.

On the other hand, since the operation time of the relay 110 is short, there is no coil heating, and there is no noise due to the maintenance of the permanent magnet, and it consumes power only when the switch is turned on. It consists of a latch relay that can be mechanically operated. The coils are not shown except for electrode terminals for electrical connection. In addition, the specific structure and operation principle of the latch relay of the mechanical method is not only a well-known method, but also easily available on the market will be omitted here.

The battery sensor 120 is a device for measuring the amount of current supplied from the battery 10 to the electronic devices. The battery sensor 120 is configured to calculate a computer chip included in the control circuit 130 according to the measured amount of current. The state of charge, starting capability, battery life and the like are calculated and transmitted to the vehicle engine computer (ECU).

The battery sensor 120 is positioned between the second terminal 112 and the third terminal 113.

Like the first and

second terminals

111 and 112, since the second terminal 112 and the third terminal 113 are also spaced apart from each other, power does not pass, so that the battery sensor 120 is connected to the second terminal 112. By being positioned between the third terminal 113, the power is passed between the second terminal 112 and the third terminal 113, and the amount of current transmitted therefrom is measured.

As the battery sensor 120, a shunt resistor is used to measure the amount of current. The method of measuring the amount of current using the shunt resistor is based on a principle of measuring a voltage generated by putting a resistor in series in the middle of an electric wire. Not only is it a well-known method, but a standardized shunt resistor can be easily purchased and used, so a detailed description of its usage and principle will be omitted.

The relay 110, the battery sensor 120, and the control circuit 130 may be integrally assembled in a single body, which reduces the volume of the high current automatic power cutoff device 100 and takes up less space in the vehicle. This is to facilitate the installation.

The control circuit 130 includes a control unit 131 for disconnecting the connection terminal 114 of the relay 110 when the current value measured from the battery sensor 120 is equal to or greater than a prescribed value.

For example, when an error occurs in a vehicle and an overcurrent is supplied or a vehicle collision occurs, the control circuit 130 controls the controller 10 in the control circuit to transmit the state of the battery 10 and the collision signal through CAN or LIN communication with the ECU and the ACU. 131, the relay 110 is operated according to these signals to cut off the power connection between the first terminal 111 and the second terminal 112.

At this time, even when the power supply connection between the first terminal 111 and the second terminal 112 is cut off by the operation of the relay 110 by the control circuit 130, the second terminal 112 and the third terminal 113 are batteries. Since the power is continuously supplied by the sensor, the power of the battery 10 is continuously supplied to the constant load connected to the third terminal 113.

Therefore, even if the vehicle is malfunctioned due to an overload or a vehicle crash, and the relay is operated so that power is not supplied to the vehicle load due to the interruption of the first terminal and the second terminal, the third terminal is supplied with battery power. Even if the necessary permanent load is connected to the third terminal, they are always available.

If the load devices connected to the first terminal 111 are to be used again, the power is supplied to the first terminal 111 and the second terminal 112 by reconnecting the connection terminal 114 of the disconnected relay 110. The control circuit 130 of the control circuit 130 may also be made. For example, when a recovery command or operation for connecting the first terminal 111 and the second terminal 112 occurs, the ECU and the ACU transmit a recovery signal to the controller 131 through CAN communication or LIN communication. The control unit 131 reconnects the connection terminal 114 of the relay 110 according to the received recovery signal so that power is supplied to the first terminal 111 and the second terminal 112 again.

* As described above, the conventional high current automatic power cut-off device has a difficulty in installation because the IBS and the fuse or the relay is formed in a separate space and occupies a large amount of space in the vehicle during installation. According to the present invention, the battery sensor is inserted into the relay terminals and the relay, the battery sensor, and the control circuit are integrally assembled into a single body, thereby reducing the volume of the large current automatic shutoff device 100, thereby reducing the space inside the vehicle. The charge makes it easy to install inside the vehicle.

In addition, even when the power supply to the first terminal 111 is cut off from the vehicle due to an abnormality, the third terminal 113 is always supplied with power, so that the electrical equipment of the always-loaded loads necessary for emergency in the third terminal ( 113) enables the constant use of these electronics.

In addition, by using the mechanical relay 110, it can be used semi-permanently because the power supply of the battery 10 can be shut off and re-in case of abnormality.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

Claims

A relay having a first terminal connected to the vehicle load, a second terminal connected to the positive pole of the battery, a third terminal connected to the constant load, and a connection terminal connecting electricity between the first terminal and the second terminal ;

A battery sensor positioned between the second terminal and the third terminal to connect the second terminal and the third terminal and measure a current value supplied from the battery to the vehicle load; And

A control circuit including a control unit for disconnecting the connection terminal of the relay when the current value measured from the battery sensor is equal to or greater than a prescribed value;

Large current automatic shut off device comprising a.
The method of claim 1,

And the battery sensor is a shunt resistor.
The method according to claim 1 or 2,

High current power automatic shut off device characterized in that the relay, the battery sensor and the control circuit is integrally assembled.