JPH11291851A - Circuit breaker for vehicle and method for actuating the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability of firing explosives at the time of scrapping a vehicle regarding a vehicular circuit breaker for cutting off power supply by using explosives to break a conductor provided between an on-vehicle battery and on-vehicle electric equipment. SOLUTION: The operation of an engine key inserting part 5 by an ignition key is detected by a control unit 61. The operation of removing a connector 26 is detected by an air bag ECU 7. Then, after the air bag ECU 7 detects the OFF position of the ignition key inserted into the engine key inserting part 5 and the removable of the connector 26, the charges of a storage battery are instantaneously discharged to supply a heavy current to the electric heater line of a squib 22, and then explosives are fired.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker for a vehicle, in which a conductor interposed between a vehicle-mounted battery and a vehicle-mounted electrical component is broken by an explosive to cut off power supply, and this circuit breaker. It relates to a method of operating the device.

[0002]

2. Description of the Related Art Generally, in electric circuits for automobiles and the like,
Fuses and fusible links are commonly used as a means for immediately breaking a circuit when an overload current or a short-circuit current occurs. These fuses and fusible links have a fusible conductor inside the container and have a basic structure with connection terminals led out of the container.Most of them are connected to electrical junction boxes and used. Have been.

However, the fuse and the fusible link blow out only when an overcurrent is generated and cut off the circuit, so that the circuit cannot be forcibly cut off at an arbitrary timing. Therefore, in the event of an emergency such as a vehicle collision, if it is desired to forcibly cut off the circuit for safety even if no overcurrent flows, the circuit can be forcibly cut off by an external operation instead of or in addition to the fuse or fusible link. You need to do that.

Conventionally, a circuit breaker as disclosed in Japanese Patent Publication No. 58-47809 has been known as a means capable of forcibly interrupting such a circuit.

This circuit breaker has an output fuse, an explosive,
A filament for heating the explosive is enclosed in a single enclosed glass, and an input terminal connected to the filament is led out of the enclosed glass so as to pass through the enclosed glass. An explosion-proof coating is applied to the surface of the enclosed glass. Then, the filament is heated by applying a certain amount of current or voltage to the input terminal, and the explosive is exploded by the heat, so that the explosive force can be used to forcibly break the fractured portion. ing.

If such a circuit breaker is interposed between the power supply and each of the on-vehicle electrical components, when an accident such as a vehicle collision occurs, the circuit is controlled at an arbitrary timing by controlling the input current or input voltage to the input terminal. Can be cut off.

[0007]

However, when such a member using explosive is mounted, considering the safety and the environment, the explosive is ignited beforehand when the vehicle is discarded, so that the explosive is surely ignited. It is necessary to perform operation processing.

On the other hand, airbags, seat belt pretensioners, and the like are conventionally known as on-vehicle members provided with explosives. For example, an operation process for disposing of an airbag in a vehicle is as follows. From the power supply and start operation. (2) With the parts still mounted on the vehicle, remove the connector interposed in the power supply cable for detonation and supply the detonation power from a separately prepared power source to operate. And so on for each component.

However, it is complicated and troublesome for the above-mentioned circuit breaker to perform the operation processing for disposing of the vehicle in the same manner as in the above (1) and (2), as in the case of the airbag. It takes time. Therefore, in the operation processing of the circuit breaker for disposing of the vehicle, it is desired to safely and surely ignite the explosive and to improve the workability thereof.

[0010] The present invention has been made in view of the above,
A circuit breaker for a vehicle in which a conductor interposed between an on-vehicle battery and on-vehicle electrical components is broken by an explosive to cut off power supply. It is an object of the present invention to provide a circuit breaker for a vehicle and an operation method of the circuit breaker, which is improved.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a circuit breaker comprising a conductor portion interposed between a vehicle-mounted battery and a vehicle-mounted electrical component and explosives for breaking the conductor portion. Removal detection means for detecting the circuit removal operation performed in, operation detection means for detecting a specific switch operation, and when the detection of the circuit removal operation and the detection of the specific switch operation are performed, And ignition control means for igniting the explosive.

According to this configuration, when the detection of the operation of removing the circuit performed for dismantling the vehicle and the detection of the operation of a specific switch are performed, the circuit is interposed between the vehicle-mounted battery and the vehicle-mounted electrical components. The operation for dismantling the vehicle is safely performed by igniting the explosive for breaking the conductor portion that has been broken. In addition, unless the specific switch operation is detected in addition to the detection of the circuit removing operation, the ignition of the explosive is not performed, so that the careless ignition of the explosive is prevented.

If the specific switch operation is a switch operation at a position distant from the place where the circuit interrupting means is disposed, and the switch operation is performed after the circuit removing operation, the operator can operate the circuit interrupting means at the time of ignition of the explosive. Is surely distant from the location where the device is disposed, and the safety is further enhanced.

Further, the ignition control means waits for the ignition until a predetermined time elapses from the detection of the circuit removal operation, so that even if the circuit removal operation is performed after the switch operation, Since the explosive is not ignited until a predetermined time elapses from the detection, the worker can move away from the place where the circuit breaker is provided, and the safety of the worker is further enhanced.

Further, the removal detecting means detects an operation of removing the conductor from the vehicle-mounted battery and the vehicle-mounted electrical component, so that the worker can discard the conductor. Direct detection enables automatic blasting at the right time.

Further, one end of the conductor is directly connected to a terminal of the vehicle-mounted battery, and the detachment detecting means detects an operation of disconnecting the connection of the other end of the conductor. It can be clearly distinguished from battery replacement work.

The conductor is interposed between a motor power cable connected to a starter motor and a vehicle-mounted battery, and the detachment detecting means includes a motor power cable and the conductor. It may detect the operation of disconnecting the connection.

According to this configuration, the removal operation can be easily detected, and the motor power cable can be protected by the circuit interrupting means.

Further, the removal detecting means may detect an operation of disconnecting a connection between a specific on-vehicle electrical component which is always supplied with power from the on-vehicle battery and the on-vehicle battery. In this case, the specific on-vehicle electrical component may have a power terminal connected between the on-vehicle battery and the conductor.

According to this configuration, the operation of removing the circuit is clearly distinguished from merely turning on / off the on-vehicle electrical components.

Further, the specific on-vehicle electrical component may be an electrical component for safe operation. Here, as the electrical components for safe operation, for example, a door lock device for unlocking a door in an emergency, a room lamp or a hazard lamp for emergency lighting, etc. may be used.

Further, the detachment detecting means includes a first operation for removing the conductor portion between the vehicle-mounted battery and the vehicle-mounted electric component, and a specific vehicle-mounted electric component and a vehicle-mounted battery which are always supplied with power from the vehicle-mounted battery. Disconnect the second connection
The ignition control means detects ignition of the explosive when the detection of the first and second operations and the detection of the specific switch operation are performed. It may be performed.

According to this configuration, the first operation of removing the conductor from the vehicle-mounted battery and the vehicle-mounted electrical component and the connection between the vehicle-mounted battery and a specific vehicle-mounted electrical component constantly receiving power from the vehicle-mounted battery are performed. By making both operations of the second operation of removing the circuit as the operation of disconnecting the circuit, it becomes more clear that the operation is performed for dismantling the vehicle, and accidental ignition of explosive is better prevented.

Also, one end of the conductor is directly connected to a terminal of a vehicle-mounted battery, and the detachment detecting means detects an operation of disconnecting the other end of the conductor as the first operation. By doing so, the removal operation as the first operation can be easily performed.

Further, the removal detecting means, the operation detecting means, and the ignition control means may include a power storage unit for storing electric power supplied from the vehicle-mounted battery.

According to this configuration, when the detachment detecting means, the operation detecting means, and the ignition control means are connected to the vehicle battery via the first or second operation detaching position, the first and second operations are performed. The power supply from the vehicle-mounted battery to the detachment detecting means, the operation detecting means, and the ignition control means is stopped by the operation of. However, even in this case, the operation of each means can be performed by the electric power stored in the power storage unit.

[0027] Further, there is provided timing means for timing an interval between the detection of the first operation and the detection of the second operation, and the ignition control means ignites the explosive when the interval is longer than a predetermined time. May be performed.

In general, in the operation of replacing the vehicle-mounted battery, at the upstream side of the removal point in the first and second operations,
The connection between the vehicle-mounted battery and each part is removed. Therefore,
When the in-vehicle battery replacement operation is performed, both the first and second operations are detected. Here, when the first operation and the second operation are actually performed, the respective operations are performed at intervals of a predetermined time or longer, but when the vehicle battery is replaced, the first operation is performed. The detection of the operation and the detection of the second operation are performed almost simultaneously.

Therefore, according to this configuration, the explosive is ignited when the interval between the detection of the first operation and the detection of the second operation is equal to or longer than a predetermined time. And the second operation are surely distinguished.

Further, the timing means may include a power storage unit for storing power supplied from the vehicle-mounted battery.

According to this configuration, when the timekeeping means is connected to the vehicle-mounted battery via the removal position of the first or second operation, the first and second operations cause the transfer from the vehicle-mounted battery to the timekeeping means. Is stopped, but in this case also, the operation of the timekeeping means can be performed by the power stored in the power storage unit.

Further, the operation detecting means may detect a switch operation in a vehicle compartment.

According to this configuration, by setting the switch operation in the vehicle cabin to a specific switch operation, the operator is away from the place where the circuit breaker is disposed, generally the engine room, and safety is improved. Is even higher. If the switch operation is performed after the circuit removal operation,
The safety of the worker at the time of explosive ignition is more reliably achieved.

Further, the operation detecting means may detect an operation of the ignition key on the engine key insertion portion.

According to this configuration, since the existing key insertion part is used, there is no need to provide a new switch.
The configuration is prevented from becoming complicated and the number of parts is prevented from increasing. Also,
Operation is easily detected.

The operation detecting means may detect an insertion operation of the ignition key into the engine key insertion portion.

According to this configuration, if the insertion operation is performed following the circuit removal operation and the ignition is performed immediately after the insertion operation, the ignition is performed while the operator is in the vehicle interior, so that the safety is ensured. Sex is further enhanced.

Further, if the operation detecting means detects that the ignition key has been continuously inserted into and removed from the engine key insertion portion a predetermined number of times within a predetermined time, such insertion and removal will be described. Since it is not generally performed, it is more clear that the operation is a disposal process.

The operation detecting means may detect that the ignition key is at the off position of the engine key insertion portion.

The operation detecting means may detect a change operation of the engine key insertion portion from the off position to the accessory on position by the ignition key.

According to this configuration, if the changing operation is performed following the circuit removing operation and the ignition is performed immediately after the changing operation, the ignition is performed while the operator is in the vehicle interior, and the safety is improved. Sex is further enhanced.

The present invention also provides a method of operating a circuit breaker for a vehicle comprising a conductor interposed between a vehicle-mounted battery and a vehicle-mounted electrical component, and a circuit breaker made of explosive for breaking the conductor. The ignition of the explosive is performed when the detection of a circuit removal operation and the detection of a specific switch operation performed for dismantling the vehicle are performed.

According to this method, when detection of a circuit removal operation performed for dismantling a vehicle and detection of a specific switch operation are performed, an intervening battery is provided between the vehicle-mounted battery and the vehicle-mounted electrical components. The operation for dismantling the vehicle is safely performed by igniting the explosive for breaking the conductor portion that has been broken. In addition, unless the specific switch operation is detected in addition to the detection of the circuit removing operation, the ignition of the explosive is not performed, so that the careless ignition of the explosive is prevented.

[0044]

FIG. 1 is a circuit block diagram showing a power supply circuit of a first embodiment of a motor vehicle to which a vehicle circuit breaker according to the present invention is applied. The first embodiment is shown in FIG.
As shown in FIG. 1, a battery 1, a shutoff unit 2, a starter motor 3, an outdoor electric connection box 4, an engine key insertion portion 5,
An indoor electrical connection box 6 and an airbag ECU 7 are provided.

The interrupting unit 2 includes a bus bar (conductor portion) 21
And a squib (explosive) 22. The bus bar 21 is made of a conductor, and one end 23 is connected to the positive terminal 1 of the battery 1.
1 and the other end 24 is connected to the power supply terminal 31 of the starter motor 3 via the motor power cable 13. The squib 22 has a small amount of explosive packed around the electric heater wire, and is disposed near the bus bar 21.
The connector 25 is connected to the airbag ECU 7.

When a current is supplied to the electric heater wire of the squib 22, the electric heater wire generates heat and ignites the explosive, whereby the bus bar 21 is broken.

The ground terminal 32 of the starter motor 3 is shared with the ground terminal 34 of the engine 33 and the ground terminal 36 of the alternator 35.
4 is connected to the negative terminal 12 of the battery 1, and the negative terminal 12 of the battery 1 is connected to the conductor 16 of the vehicle body via the battery ground cable 15.

The outdoor electric junction box 4 houses a fusible link 41 and small-capacity fuses 42, 43, 44, etc. The indoor electric junction box 6 has a control unit (ECU) 6.
1 is housed.

The engine key insertion section 5 is for inserting an ignition key, and includes an ignition key switch 51 and a key insertion switch 52.

The ignition key switch 51 sends a signal corresponding to the position of the ignition key inserted into the engine key insertion unit 5 from each line to the control unit 61. The ignition key switch 51 includes an accessory on position (ACC) and an ignition on position (ACC). IG) and starter-on position (not shown). The key insertion switch 52 grounds the signal line (I / O) when the ignition key is inserted.

The other end 24 of the bus bar 21 is connected to the fusible link 41 via the connection power cable 17. The fusible link 41 branches and is connected to the power supply terminal 37 of the alternator 35, 42, is connected to a power supply terminal of the control unit 61, and is further connected to the ignition key switch 5 through a fuse 43.
1 connected.

Power is supplied to the electrical components connected to the connection power cable 17 irrespective of the position of the ignition key inserted into the engine key insertion portion 5.

The one end 23 of the bus bar 21 is connected to a fuse 44 via a connector 26, and the fuse 44 is connected to a load 6 via a control unit 61 of the indoor electrical connection box 6.
2 are connected.

The load 62 is a safety operation electrical component that operates in an emergency, such as a door lock device for unlocking a door in an emergency, a room lamp or a hazard lamp for emergency lighting, and the like. Power is supplied from the battery 1 without passing through the unit 2.

The control section 61 includes a switch element such as a transistor, a CPU, and the like, and has the following functions. (1) A function as operation detecting means for detecting an operation of the engine key insertion unit 5 by an ignition key based on signals from the ignition key switch 51 and the key insertion switch 52. With this, the presence or absence of insertion and the insertion position (accessory ON position, ignition ON position,
Or, an off position that is neither the accessory on position nor the ignition on position) is detected.

(2) A function of transmitting information on the operation of the detected ignition key to the airbag ECU 7.

The airbag ECU 7 includes a power storage unit 70 composed of a large-capacity capacitor or the like, controls the operation of the airbag, and has the following functions. (1) Circuit position 45 between connector 26 and fuse 44
Function as removal detection means for monitoring the voltage level of the connector 26 and detecting an operation of removing the fitting of the connector 26.

(2) Detection that the ignition key is in the off position with the ignition key inserted into the engine key insertion portion 5,
When the connector 26 is detected to be disconnected, a function as ignition control means for instantaneously discharging the electric charge of the power storage unit 70, supplying a large current to the electric heater wire of the squib 22, and igniting the explosive.

Next, a procedure for operating the shut-off unit 2 when the vehicle is discarded will be described with reference to the flowchart of FIG. First, it is determined whether or not the fitting of the connector 26 has been removed (step # 100). If not (NO in step # 100), this routine ends.

When the connector 26 is disengaged (YES in step # 100), counting of the elapsed time is started (step # 110), and it is determined whether a predetermined time (for example, several seconds) has elapsed (step ##). 120), if it has not elapsed (NO in step # 120), the process waits until it has elapsed, and after a predetermined time has elapsed (step # 120).
YES), it is determined whether or not the ignition key is inserted at the off position (step # 130).

If the ignition key is not inserted into the off position (NO in step # 130), the process waits until the ignition key is inserted into the off position, and if the ignition key is inserted into the off position (YES in step # 130). ), An electric current is supplied to the squib 22, the explosive is ignited, and the shutoff unit 2 operates (step # 140).

As a result, the explosive in the shut-off unit 2 is processed, and thereby the power supply from the battery 1 to the electrical components via the shut-off unit 2 is cut off. Also,
Since the supply of power from the battery 1 to the safe operation electrical components without passing through the shut-off unit 2 is also interrupted by removing the fitting of the connector 26, the power supply to all the electrical components can be interrupted by the above procedure.

Therefore, the shutoff unit 2 can be easily collected, and the subsequent vehicle disposal work can be performed safely. Further, the operation process of the shutoff unit 2 can be performed without performing any special operation.

Further, since the operation by the existing ignition key is detected, the operation process of the shut-off unit 2 can be performed without providing a dedicated operation switch, complicating the configuration and increasing the number of parts. it can.

Further, since both the condition that the ignition key is inserted into the off position and the condition that the connector 26 is disengaged are the operating conditions of the shut-off unit 2, it is possible to prevent the accidental operation. Can be.

Further, since the connector 26 is on standby for a predetermined time after the fitting of the connector 26 is removed, even if the fitting of the connector 26 is removed after the ignition key is turned off.
At the time of ignition of the explosive, the operator can move away from the position where the connector 26 is provided, so that the operation of the shut-off unit 2 can be performed more safely.

Further, if the ignition key is operated after the connector 26 is disengaged, the worker is surely separated from the engine room in which the shutoff unit 2 is disposed. Safety can be further improved.

Further, since the detachment of the fitting of the connector 26 connected to the electrical equipment for safe operation is detected, it can be clearly distinguished from mere on / off of the electrical equipment.

FIG. 3 is a circuit block diagram showing a power supply circuit of a second embodiment of an automobile to which the vehicle circuit breaker according to the present invention is applied, and FIG. 4 is a diagram showing a connection state of a positive terminal 11 of the battery 1. It is. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 4 (a), the terminal coupling fitting 81
Is connected to the positive electrode terminal 11 so as to hold it, and one end 23 side of the bus bar 21 of the shutoff unit 2 is connected to the terminal coupling metal member 81 by a metal member not shown.

On the other hand, the round plate terminal 83 of the connection power cable 17 and the round plate terminal 84 of the motor power cable 13 are fitted to the stud bolt 82 projecting from the other end 24 of the bus bar 21. Then, the stud bolt 82
When the nut 85 is tightened, the connection power cable 17 and the motor power cable 13 are connected to the positive terminal 11 of the battery 1 via the cutoff unit 2.

In the vicinity of the stud bolt 82, a voltage detection terminal 86 is provided. This voltage detection terminal 86
As shown in FIG. 4B, the end portion 87 is composed of a metal end 87 and a base 88 made of an insulator.
8 is connected to a cable 89.

As shown in FIG. 4C, when the nut 85 is tightened to the stud bolt 82, the voltage detection terminal 86 is disposed at a position where the round plate terminal 83 comes into contact with the end 87. By this contact, the battery 1 is connected to the positive terminal 11 of the battery 1 via the round plate terminal 83 and the cutoff unit 2. The cable 89 of the voltage detection terminal 86 is connected to the airbag ECU 7 via the connector 25.
1 connected.

In FIG. 3, the fuse 43 of the outdoor electric connection box 4 is composed of a fuse 44 and an ignition key switch 51.
Is connected between. The connection point between the fuse 43 and the fuse 44 is connected to the load 62 via the control unit 61 as in the first embodiment.
1 power supply terminal.

Thus, the power supply from the battery 1 to the ignition key switch 51 and the control unit 61 is performed via the connector 26 without passing through the cutoff unit 2 and the connection power cable 17.

The airbag ECU 71 includes a power storage unit 70 composed of a large-capacity capacitor or the like, controls the operation of the airbag, and has the following functions. (1) A function as removal detection means for monitoring the voltage level at the end 87 of the voltage detection terminal 86 and detecting an operation in which the motor power cable 13 and the connection power cable 17 are removed from the shutoff unit 2.

(2) Detection that the ignition key is in the off position with the ignition key inserted into the engine key insertion portion 5,
When the removal of the power cables 13 and 17 is detected, the electric charge of the power storage unit 70 is instantaneously discharged to make the squib 2
Function as ignition control means for supplying a large current to the second electric heater wire to ignite the explosive.

The procedure for operating the shut-off unit 2 when disposing of the vehicle in the second embodiment is described in step # 100 of FIG.
The determination can be made in the same manner as in the first embodiment by determining whether or not 3, 17 has been removed from the shut-off unit 2.

As a result, the explosive of the shut-off unit 2 is processed, and thereby, the power supply from the battery 1 to the electrical component via the shut-off unit 2 is cut off except for the electrical component for safe operation.

Accordingly, the shut-off unit 2 can be easily collected, and the subsequent vehicle disposal work can be performed safely. Further, the operation process of the shutoff unit 2 can be performed without performing a special operation or providing a dedicated operation switch.

Further, both the fact that the ignition key is inserted in the off position and the fact that the power cables 13 and 17 are removed from the shut-off unit 2 are set as operating conditions of the shut-off unit 2, so that careless operation may be performed. Can be prevented.

Further, since a predetermined time is waited after the power cables 13 and 17 are disconnected, the worker can be away from the position where the shut-off unit 2 is disposed at the time of ignition of the explosive, so that the shut-off unit 2 can be operated more safely. Processing can be performed.

Further, since the removal of the power cables 13 and 17 from the shut-off unit 2 is detected, the intention to discard the shut-off unit 2 can be directly detected, and the operation of the shut-off unit 2 can be properly performed. It can be carried out.

Further, since the disconnection of the power cables 13 and 17 connected to the opposite side of the battery 1 is detected in the shut-off unit 2, it can be clearly distinguished from the replacement work of the battery 1.

FIG. 5 is a circuit block diagram showing a power supply circuit of a third embodiment of an automobile to which the vehicle circuit breaker according to the present invention is applied. Note that the same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted.

In the third embodiment, the outdoor electric connection box 4
The connection relationship between the power supply unit and the indoor electrical connection box 6 is the same as in the first embodiment. Further, the breaking unit 2 and the connection cables 13, 1
7 is the same as that of FIG. 4 of the second embodiment.
Further, the key insertion switch 52 is connected to the airbag ECU 72.
It is connected to the.

The airbag ECU 72 includes a power storage unit 70 including a large-capacity capacitor and controls the operation of the airbag. Note that even if the power supply from the battery 1 is stopped due to the operation of disconnecting the power cables 13 and 17 and the connector 26, the airbag ECU 72 continues to operate until the electric charge held in the power storage unit 70 is discharged. ,
The control operation is enabled by the charge. The operable time after the power supply is stopped is determined by the capacity of the power storage unit 70.

The airbag ECU 72 has the following functions. (1) Circuit position 45 between connector 26 and fuse 44
Function as removal detection means for monitoring the voltage level of the connector 26 and detecting an operation of removing the fitting of the connector 26.

(2) The voltage level at the end 87 of the voltage detection terminal 86 is monitored to detect an operation in which the motor power cable 13 and the connection power cable 17 are removed from the shut-off unit 2. function.

(3) A function as a timing means for measuring the interval between the removal of the connector 26 and the removal of the power cables 13 and 17.

(4) Function as operation detecting means for detecting whether or not an ignition key has been inserted into the engine key insertion section 5 based on a signal from the key insertion switch 52.

(5) The detection of the removal of the fitting of the connector 26 and the detection of the removal of the power cables 13 and 17 are performed at intervals of a predetermined time (for example, 0.5 second) or more. When it is detected that the ignition key has been repeatedly inserted and removed with respect to 5 within a predetermined number of times (for example, twice) within a predetermined interval (for example, 3 seconds), the electric charge of the power storage unit 70 is discharged instantaneously. A function as an ignition control means for supplying a large current to the electric heater wire of the squib 22 to ignite the explosive.

Next, a procedure for operating the shut-off unit 2 when the vehicle is discarded in the third embodiment will be described with reference to the flowchart of FIG. First, it is determined whether or not the fitting of the connector 26 has been removed (step # 150), and if it has not been removed (step # 150).
(NO in 150), then, it is determined whether or not power cables 13 and 17 are detached from shutoff unit 2 (step # 155). If not (NO in step # 155), this routine is terminated.

In step # 150, the connector 26
Is removed (YE in step # 150).
S), counting of the elapsed time is started (step # 16)
0), and then the power cables 13, 17
Is determined (step # 1).
65), and wait if not removed (step # 1)
If NO in step 65, it is removed (Y in step # 165).
ES), and proceeds to step # 185.

On the other hand, in step # 155, if power cables 13 and 17 are disconnected from cutoff unit 2 (YES in step # 155), counting of elapsed time is started (step # 170), and then connector 2
It is determined whether or not the fitting of No. 6 has been removed (step # 175). If it has not been removed, the process waits (NO in step # 175), and if it is removed (step # 17).
Then, the process proceeds to step # 185.

Next, it is determined whether or not the interval between the removal of the power cables 13 and 17 and the removal of the connector 26 is longer than a predetermined time (step # 180). If it is shorter than the predetermined time (NO in step # 180) ), End this routine.

On the other hand, if the interval between both removals is equal to or longer than the predetermined time (YES in step # 180), it is determined whether the ignition key has been repeatedly inserted and removed from the engine key insertion portion 5 a predetermined number of times within the predetermined interval. Is determined (step # 185), and if not, the process waits (NO in step # 185). If the ignition key is continuously inserted and removed a predetermined number of times within a predetermined interval (YES in step # 185). Then, a current is supplied to the squib 22, the explosive is ignited, and the shutoff unit 2 operates (step # 190).

As a result, the explosive in the shut-off unit 2 is processed, and thereby the power supply from the battery 1 to the electrical components via the shut-off unit 2 is cut off. Also,
Since the supply of power from the battery 1 to the safe operation electrical components without passing through the shut-off unit 2 is also interrupted by removing the fitting of the connector 26, the power supply to all the electrical components can be interrupted by the above procedure.

Therefore, the shut-off unit 2 can be easily collected, and the subsequent vehicle disposal work can be safely performed.

Further, the operation process of the shut-off unit 2 can be performed without performing a special operation or providing a dedicated operation switch.

The three conditions that the ignition key has been inserted and removed a predetermined number of times, that the connector 26 has been disengaged, and that the power cables 13 and 17 have been removed from the shut-off unit 2 have been determined. Since the operation condition is set to, careless operation can be more reliably prevented.

Further, since the power storage unit 70 is provided, even if the power supply from the battery 1 is stopped due to the removal of the connector 26 and the power cables 13 and 17, the removal and insertion of the ignition key can be detected.

Further, since it is determined whether or not the interval between the detection of the removal of the connector 26 and the detection of the removal of the power cables 13 and 17 is equal to or longer than a predetermined time, in the case of battery replacement, the detection of both removals is performed substantially simultaneously. Since it is performed, it can be reliably distinguished from battery replacement.

The connector 26 and the power cable 1
In addition to the removal of 3, 17 and the removal and insertion of the ignition key, which is performed a predetermined number of times within a predetermined interval of an ignition key that is not generally performed, it is possible to clarify that the operation is a disposal process.

The present invention is not limited to the above embodiments, but can adopt the following modifications.

(1) If YES in step # 130 of FIG. 2, and subsequently, when the change of the ignition key of the engine key insertion portion 5 from the OFF position to the accessory ON position is detected, the process proceeds to step # 140. Is also good.
In this case, since the worker is surely in the driver's seat when the explosive is ignited, the operation process of the shutoff unit 2 can be reliably and safely performed.

(2) The operation process may be performed according to a procedure shown in a flowchart of FIG. 7 instead of the procedure shown in FIG. In FIG. 7, Step # 200 is the same as Step # 100 in FIG. Subsequently, step # 210
In, it is determined whether or not the ignition key has been inserted into the off position of the engine key insertion section 5.

If the ignition key is not inserted, the operation waits until the ignition key is inserted into the off position of the engine key insertion section 5 (NO in step # 210).

On the other hand, if the ignition key has been inserted into the off position of engine key insertion portion 5 (YES in step # 210), it is determined whether or not the ignition key has been inserted into the off position of engine key insertion portion 5 again. That is, it is determined whether or not the ignition key is once pulled out of the engine key insertion unit 5 and inserted again from the state of YES in step # 210 (step # 220). If it is not inserted, the process waits until it is inserted again. (Step #
If it is inserted again (NO in 220) (step # 220)
YES), an ignition process is performed (step # 230).

According to this embodiment, the worker is surely in the driver's seat when the explosive is ignited, so that waiting for a predetermined time is not required, and the operation process of the shut-off unit 2 can be reliably and safely performed. In addition, the operation processing time can be shortened, and the workability can be improved.

(3) The shut-off unit 2 is connected to the electric connection box 4,
6 may be provided. According to this embodiment, the shutoff unit 2 can have a function as a protection member for other electrical components or cables.

[0112]

As described above, according to the present invention,
Explosive for breaking a conductor interposed between a vehicle-mounted battery and a vehicle-mounted electrical component when detection of a circuit removal operation performed for dismantling a vehicle and detection of a specific switch operation are performed. , The work for dismantling the vehicle can be performed safely. In addition, unless the specific switch operation is detected in addition to the detection of the circuit removing operation, the ignition of the explosive is not performed, so that the careless ignition of the explosive can be prevented.

Further, by waiting for ignition of explosive until a predetermined time elapses from the detection of the circuit disconnection operation, even if the circuit disconnection operation is performed after the switch operation, the operator can set the position of the circuit disconnecting means. Because it is possible to increase safety.

Further, by making the operation of removing the conductor from between the vehicle-mounted battery and the vehicle-mounted electrical component a circuit-removing operation, it is possible to directly detect the intention to remove the circuit breaker and perform the disposal, and The explosive can be ignited automatically at the appropriate time.

Further, when the operation of disconnecting the connection of the other end of the conductor portion whose one end is directly connected to the terminal of the vehicle-mounted battery is defined as a circuit removal operation, the operation for replacing the vehicle-mounted battery can be clearly distinguished.

Further, if the operation of disconnecting the connection between the motor power cable and the conductor interposed between the motor power cable and the vehicle-mounted battery is referred to as a circuit removal operation, the removal operation can be easily detected. In addition to this, the motor power cable can be protected by the circuit cutoff means.

Further, by making the operation of disconnecting the connection between a specific in-vehicle electrical component which is always supplied with power from the in-vehicle battery and the in-vehicle battery into a circuit removal operation, the circuit removal operation can be defined as simply turning on / off the in-vehicle electrical component. Can be distinguished.

Further, a first operation for removing the conductor portion from between the vehicle-mounted battery and the vehicle-mounted electric component, and a second operation for disconnecting the vehicle-mounted battery from a specific vehicle-mounted electric component which is always supplied with power from the vehicle-mounted battery. By making both of the operations as circuit removal operations, it becomes more clear that the operation is performed for dismantling the vehicle, and it is possible to prevent accidental ignition of explosive.

Further, the detachment detecting means, the operation detecting means, and the ignition control means are provided with a power storage unit for storing electric power supplied from the on-vehicle battery. When the detection means and the ignition control means are connected to the vehicle-mounted battery via the first or second operation removal position, the first and second operations remove the vehicle-mounted battery from the detection means, the operation detection means, and Power supply to the ignition control means is stopped,
Even in this case, each unit can be operated by the power stored in the power storage unit.

[0120] Further, there is provided timing means for timing the interval between the detection of the first operation and the detection of the second operation, and the ignition control means ignites the explosive when the interval is longer than a predetermined time. Is performed, it is possible to reliably distinguish between the on-board battery replacement operation in which the detection of the first and second operations is performed almost simultaneously and the first and second operations for dismantling the vehicle. Can be.

Further, the timing means is provided with a power storage unit for storing the electric power supplied from the on-vehicle battery, so that the timing means can be connected via the removal position of the first or second operation. When connected, the power supply from the vehicle-mounted battery to the timer is stopped by the first and second operations. Even in this case, the timer is operated by the electric power stored in the power storage unit. be able to.

Further, by setting the switch operation in the vehicle cabin to a specific switch operation, the worker is separated from the place where the circuit breaker is provided, and the safety of the worker can be further enhanced. .

Further, since the operation of the engine key insertion portion by the ignition key is a specific switch operation, the existing key insertion portion is used, so that the configuration is complicated and the number of parts is reduced without providing a new switch. Can be prevented from increasing.

Further, by detecting that the ignition key is continuously inserted and removed a predetermined number of times within a predetermined time with respect to the engine key insertion portion, such insertion and removal are not generally performed. Can be further clarified.

The operation of the engine key insertion portion by the ignition key is detected by detecting the insertion operation,
The detection can be easily performed by detecting that the vehicle is at the off position or by detecting a change operation from the off position to the accessory on position.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a power supply circuit of a first embodiment of an automobile to which a vehicle circuit breaker according to the present invention is applied.

FIG. 2 is a flowchart illustrating a procedure for operating a shutoff unit when the vehicle is discarded in the first embodiment.

FIG. 3 is a circuit block diagram showing a power supply circuit of a second embodiment of the automobile to which the vehicle circuit breaker according to the present invention is applied.

FIGS. 4A, 4B, and 4C are diagrams illustrating a connection state of a positive terminal of a battery.

FIG. 5 is a circuit block diagram showing a power supply circuit of a third embodiment of a vehicle to which the vehicle circuit breaker according to the present invention is applied.

FIG. 6 is a flowchart illustrating a procedure for operating a shutoff unit when a vehicle is discarded in the third embodiment.

FIG. 7 is a flowchart showing another procedure for operating the shut-off unit when the vehicle is discarded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery 11 Positive electrode terminal 12 Negative electrode terminal 13 Power cable for motor 17 Power cable for connection 2 Shut-off unit 21 Bus bar 22 Squib 25, 26 Connector 3 Starter motor 31 Power supply terminal 32 Earth terminal 4 Outdoor electric connection box 5 Engine key insertion part 6 Indoor Electric junction box 61 Control unit 7, 71, 72 Airbag ECU 70 Power storage unit 86 Voltage detection terminal

Claims (20)

[Claims] 1. A circuit interposed between a vehicle-mounted battery and a vehicle-mounted electrical component, and a circuit breaker made of explosives for breaking the conductor, and detecting a circuit removal operation performed for dismantling the vehicle. Detection means for detecting a specific switch operation, and ignition control for igniting the explosive when the detection of the circuit removal operation and the detection of the specific switch operation are performed. Circuit breaker for a vehicle. 2. The vehicle circuit breaker according to claim 1, wherein the ignition control means waits for the ignition until a predetermined time elapses from the detection of the circuit removal operation. Circuit breaker. 3. The circuit breaker for a vehicle according to claim 1, wherein the removal detecting means detects an operation of removing the conductor from between the vehicle-mounted battery and the vehicle-mounted electrical component. A circuit breaker for a vehicle, comprising: 4. The circuit breaker for a vehicle according to claim 3, wherein one end of the conductor is directly connected to a terminal of an on-vehicle battery, and the removal detecting means disconnects the other end of the conductor. A circuit breaker for a vehicle, which detects an operation. 5. The circuit breaker for a vehicle according to claim 3, wherein the conductor is interposed between a motor power cable connected to a starter motor and a vehicle-mounted battery. A circuit breaker for a vehicle, wherein the detecting means detects an operation of disconnecting the connection between the motor power cable and the conductor. 6. The circuit breaker for a vehicle according to claim 1, wherein the detachment detecting means operates to disconnect a connection between a specific vehicle-mounted electric component which is always supplied with power from the vehicle-mounted battery and the vehicle-mounted battery. A circuit breaker for a vehicle, which performs detection. 7. The circuit breaker for a vehicle according to claim 6, wherein the specific on-vehicle electrical component has a power terminal connected between the on-vehicle battery and the conductor. Circuit breaker for vehicles. 8. The circuit breaker for a vehicle according to claim 6, wherein the specific on-vehicle electrical component is an electrical component for safe operation. 9. The circuit breaker for a vehicle according to claim 1, wherein the detachment detecting means is configured to perform a first operation of removing the conductor from between the vehicle-mounted battery and the vehicle-mounted electric component, and to constantly supply power from the vehicle-mounted battery. The ignition control means detects both the first operation and the second operation, and detects both the second operation of disconnecting the connection between the specific in-vehicle electric component being supplied and the in-vehicle battery. A circuit breaker for a vehicle, wherein the explosive is ignited when the specific switch operation is detected. 10. The circuit breaker for a vehicle according to claim 9, wherein one end of the conductor is directly connected to a terminal of an on-vehicle battery, and the detachment detecting means performs the first operation on the conductor. A circuit breaker for a vehicle, which detects an operation of disconnecting a connection at the other end. 11. The circuit breaker for a vehicle according to claim 9, wherein the detachment detecting means, the operation detecting means, and the ignition control means include a power storage unit for storing electric power supplied from the vehicle-mounted battery. A circuit breaker for a vehicle, comprising: 12. The circuit breaker for a vehicle according to any one of claims 9 to 11, further comprising timing means for timing an interval between detection of the first operation and detection of the second operation. A circuit breaker for a vehicle, wherein the ignition control means ignites the explosive when the interval is equal to or longer than a predetermined time. 13. The circuit breaker for a vehicle according to claim 12, wherein said timer means includes a power storage unit for storing power supplied from said on-vehicle battery. apparatus. 14. A circuit according to claim 1, wherein said operation detecting means detects a switch operation in a vehicle compartment. Blocking device. 15. The circuit breaker for a vehicle according to claim 14, wherein said operation detecting means detects an operation of an ignition key on an engine key insertion portion. 16. A circuit breaker for a vehicle according to claim 15, wherein said operation detecting means detects an insertion operation of an ignition key into an engine key insertion portion. . 17. A circuit breaker for a vehicle according to claim 15, wherein said operation detecting means detects that the ignition key has been continuously inserted and removed a predetermined number of times within a predetermined time with respect to an engine key insertion portion. And a circuit breaker for a vehicle. 18. The vehicle circuit breaker according to claim 15, wherein said operation detecting means detects that an ignition key is at an off position of an engine key insertion portion. Circuit breaker. 19. The circuit breaker for a vehicle according to claim 15, wherein said operation detecting means detects an operation of changing an ignition key from an off position of an engine key insertion portion to an accessory on position. A circuit breaker for a vehicle characterized by the following. 20. A method for operating a circuit breaker for a vehicle, comprising: a conductor interposed between a vehicle-mounted battery and a vehicle-mounted electrical component; and a circuit breaker made of explosive for breaking the conductor. Wherein the explosive is ignited when the detection of a circuit removal operation and the detection of a specific switch operation performed for dismantling the vehicle are performed. .