JP4631217B2 - High voltage system shutoff device for automobiles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high-voltage system shut-off device that shuts off a high-voltage electrical system in an emergency in an automobile having a high voltage source such as an electric car.
[0002]
[Prior art]
In an electric vehicle, the driving force of the vehicle is obtained from a power source having a remarkably high voltage (several hundred volts) compared to a battery (generally 12 volts) mounted on a normal automobile. For this reason, electric vehicles are required to take measures to prevent the occurrence of vehicle fires, electric shocks, and the like due to a high voltage source applied in the event of a collision, and various techniques have been proposed.
[0003]
For example, Japanese Utility Model Laid-Open No. 61-202101 discloses a technique for interrupting energization from a power source to a driving device when an electric vehicle detects a collision. Japanese Patent Application Laid-Open No. 09-284901 discloses a case where, when an electric vehicle equipped with a plurality of batteries collides, high voltage leakage is prevented by separating the batteries, and further, the damage situation of the vehicle is slight. Discloses a technology that allows the vehicle to run again by connecting the battery.
[0004]
Japanese Patent Application Laid-Open No. 06-46502 discloses that in an electric vehicle, an electrical component such as a headlight can be driven when an abnormality occurs in the electric system due to a collision of the vehicle or the like, or the possibility increases. A technique for cutting off a high-voltage power supply for driving (traveling) a vehicle while connecting the low-voltage power supply is disclosed.
[0005]
[Problems to be solved by the invention]
However, in the system that shuts off the high-voltage power supply circuit at the time of a vehicle collision as described above, it cannot be confirmed from the appearance of the vehicle whether the circuit of the high-voltage power supply is actually shut off at the time of the vehicle collision. For this reason, in the unlikely event that the system does not operate properly and the high-voltage power supply circuit is not shut off at the time of a vehicle collision and there is a leakage in the vehicle body, it is judged visually whether there is a risk I can't.
[0006]
Therefore, it can be considered that the circuit of the high-voltage power supply has already been cut off, and the vehicle body may be touched. This may cause an electric shock not only to the passenger but also to an external rescuer.
For this reason, it is possible to confirm whether or not the circuit of the high voltage power supply is interrupted at the time of the vehicle collision, or in the event that the system does not operate properly and the circuit of the high voltage power supply is not interrupted at the time of the vehicle collision, There has been a demand to be able to manually cut off the high voltage power supply circuit.
[0007]
The present invention has been devised in view of such a problem, and it is possible to confirm whether or not a circuit of a high voltage power supply is interrupted at the time of a vehicle collision, SUMMARY OF THE INVENTION An object of the present invention is to provide a high-voltage system interrupting device for an automobile that can manually shut off a high-voltage power supply circuit when the high-voltage power supply circuit is not shut off at the time of a vehicle collision.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, in the high voltage system interrupting device for an automobile of the present invention (Claim 1), when the collision detecting means detects a collision of the automobile that obtains the driving force by the high voltage power source, Based on the collision detection signal from the collision detection means, the means cuts off the circuit of the high-voltage power supply when the automobile collides. Further, at the time of the collision of the automobile, the power circuit cutoff state determining means determines whether or not the high voltage power supply circuit cutoff is executed by the high voltage system cutoff control means, and the notifying means is the power circuit cutoff state determining means. interrupting the circuit of the high voltage power supply by the high voltage system interruption control means based on the determination information from the notifying it is not running.
[0009]
Therefore, in the event of a car collision, the occupant or rescuer can recognize whether the circuit of the high voltage power supply is cut off. If the circuit of the high voltage power supply is not cut off, consider the risk of electric leakage. However, the subsequent treatment can be performed.
The notification means turns on the indicator lamp only when the circuit of the high-voltage power supply is not executed by the high-voltage system shut-off control means, and turns off the lamp otherwise. It is also preferable to notify by performing special blinking at a rhythm different from the normal blinking state of the hazard lamp when the circuit of the high voltage power supply is not cut off by the voltage system cutoff control means.
In the high voltage system shutoff control means, when the collision detection means detects a collision, the high voltage power supply circuit is temporarily shut off, and then a deceleration exceeding a predetermined value does not occur within a predetermined time after the collision detection. Alternatively, it is also preferable to reconnect the circuit of the high voltage power supply when the vehicle speed does not keep 0 for a predetermined time or more within a predetermined time after the collision detection.
[0010]
In this case, when the deceleration more than a predetermined value occurs within a predetermined time after the collision detection, or when the vehicle speed keeps 0 for a predetermined time or more within the predetermined time after the collision detection, It is preferable to determine whether or not the high-voltage power supply circuit is shut off and to notify whether or not the high-voltage power supply circuit is shut off by the high-voltage system shutoff control means.
[0011]
Alternatively, in the high voltage system shutoff control means, when the collision detection means detects a collision and a deceleration more than a predetermined value occurs or the vehicle speed becomes zero within a predetermined time after the collision detection, the circuit of the high voltage power supply is turned on. It is also preferable to block.
Further, a high-voltage system manual shut-off means is provided for manually shutting off the high-voltage power supply circuit under a predetermined condition when the car is in a collision and the high-voltage power supply circuit is not shut off. if, by blocking circuits reliably high voltage power supply by manually through the high-voltage system manual blocking means, after eliminating the risk of electric shock due to current leakage, ing to be able to carry out the subsequent treatment with a large degree of freedom .
[0012]
As such an operation means, an emergency switch provided in the vehicle is preferable for the passenger to operate, and a remote control switch that can be operated by remote control is preferable for the operation by an external rescuer.
Furthermore, as a predetermined condition for enabling the high voltage power supply circuit to be shut off by such an operating means (particularly a remote control switch), the vehicle is in a collision and the high voltage power supply circuit is not shut off. It is preferable that the vehicle is stopped (the vehicle speed is in a state of 0 for a predetermined period).
This avoids the problem that the high voltage power supply circuit is cut off during the evacuation travel and the vehicle cannot travel.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a high voltage system interrupting device for an automobile according to an embodiment of the present invention, and FIG. 1 is a block diagram showing the configuration of the main part of the automobile and the high voltage system interrupting device, FIG. 3 is a flowchart showing the operation of the high-voltage system cutoff device.
[0014]
The vehicle according to the present embodiment is an electric vehicle that obtains driving force by a high-voltage power supply such as several hundred volts, and includes a driving motor 1 for rotating driving wheels as shown in FIG. . In order to supply electric power to the motor 1, for example, a main battery 2 in which a large number of 12-volt batteries are connected in series, a main contactor 3 connected to the main battery 2, and the main contactor 3 and the motor 1. An intervening motor controller 4 is provided.
[0015]
Therefore, the motor 1 is rotated by the power of the main battery 2 that is controlled by the motor controller 4 and supplied via the main contactor 3. The main battery 2 corresponds to a high voltage power source, and the circuit from the main battery 2 to the motor controller 4 via the main contactor and the main battery 2, the main contactor 3, and the motor controller 4 are collectively referred to as a high voltage. It will be called system 6.
[0016]
The high-voltage system interrupting device 10 includes a collision detection sensor (collision detection means) 11 that detects a collision of the automobile, a vehicle speed sensor (vehicle speed detection means) 12 that detects the speed of the automobile, a collision detection means 11 and a vehicle speed sensor. And a power supply circuit for determining whether or not the circuit 5 of the high-voltage power supply 2 is shut off. As an interruption state determination means 15, an informing means 16 for notifying whether or not the circuit 5 of the high voltage power supply 2 is being executed, and a high voltage system manual interruption means for manually interrupting the circuit 5 of the high voltage power supply 2 Remote control receiver 21 and in-vehicle power switch 22.
[0017]
For example, an acceleration sensor using a piezo element or an engineering sensor in which an optical fiber and a light emitter are combined can be applied to the collision detection sensor 11. However, the collision detection sensor 11 is not particularly limited thereto. In addition, an existing collision detection sensor may be diverted by using information from a collision detection sensor provided for an airbag directly or via an airbag ECU.
[0018]
The high voltage system cutoff control means 14 and the power supply circuit cutoff state determination means 15 are provided as functional elements in the collision detection power cutoff ECU 13.
The high voltage system shutoff control means 14 shuts off the circuit 5 of the high voltage power supply 2 through the main contactor 3 when it receives a collision detection signal from the collision detection sensor 11, but when it receives the collision detection signal from the collision detection sensor 11. if occurs a predetermined value or more larger reduction rate in the automobile within a predetermined time period t1 from the collision of the vehicle is not generated in practice, as the collision detection of the vehicle by the collision detection sensor 11 was malfunctioning The circuit 5 of the high voltage power supply 2 is reconnected through the main contactor 3.
[0019]
Thus, in the present embodiment, it is assumed that a predetermined value or more larger reduction rate in the automobile within a predetermined time period t1 after the collision detection in the collision detection sensor 11 is a collision Once generated actually occurs, the collision detection sensor 11 Although the collision if not occurred a predetermined value or more large reduction rate is actually car collision detection after a predetermined period t1 is assumed to have not occurred for a predetermined time period after the collision detection in the collision detection sensor 11 t2 It is assumed that a collision has actually occurred if the vehicle speed is changed at a vehicle speed 0 for a certain time tt1 or more within (t2> t1), and the vehicle speed is changed at a vehicle speed 0 for a certain time tt1 or more within a predetermined time t2 after the collision detection by the collision detection sensor 11. If not, it may be that the collision did not actually occur.
[0020]
In the power supply circuit breaking state determining means 15, a predetermined value or more large reduction rate is determined whether occurring on motor vehicles after the collision detection in the collision detection sensor 11 elapses the predetermined time t1 after the collision detection, and, in the detection of a crash If the vehicle speed is 0 or more before a predetermined time t3 (t3> t1, t3 = t2 may elapse) and the vehicle speed is 0 or more, the high voltage is determined from the energization information from the main contactor 3 at this time. It is determined whether or not the high-voltage power supply circuit is shut off by the system shut-off control means 14. In this way, it is confirmed whether or not the high-voltage power supply circuit has been shut off at the time when the vehicle has stopped reliably, and the notification thereof, to confirm that the vehicle speed changes for a certain time tt2 or more. It is for making it carry out.
[0021]
In the case where it is determined that a collision has actually occurred if the vehicle speed is 0 or more during a predetermined time tt1 within a predetermined period t2 after the collision detection by the collision detection sensor 11, the power supply circuit cutoff state determination means 15 If the vehicle speed is changed at the vehicle speed 0 for a predetermined time tt1 or more until the predetermined time t2 elapses after the collision detection, at this time, it is determined that the collision has actually occurred, and the high voltage system cutoff control is performed from the energization information from the main contactor 3. You may comprise so that it may be determined whether interruption | blocking of the circuit of the high voltage power supply by the means 14 was performed.
[0022]
The notification means 16 includes a fail indicator 18, a hazard lamp 19, and a notification control means 17 for controlling them. The notification control means 17 is provided as a functional element in the collision detection power cut-off ECU 13. When the power supply circuit cut-off state determination means 15 determines whether or not the high-voltage power supply circuit is cut off after the collision, the determination result is obtained. Based on this, the fail indicator 18 and the hazard lamp 19 are controlled so as to notify whether or not the circuit of the high voltage power supply has been cut off.
[0023]
That is, the fail indicator 18 and the hazard lamp 19 are set to display differently depending on whether or not the high-voltage power supply circuit is shut off after the collision. For example, in the case of an indicator lamp, the fail indicator 18 is turned on only when the circuit of the high voltage power supply is not cut off after the collision, and is turned off otherwise. Further, the hazard lamp 19 may be flashed at a rhythm (special flashing) different from the normal flashing state when the circuit of the high voltage power supply is not cut off after the collision.
[0024]
Further, it may be notified by a sound of a buzzer or the like, and further, for example, it is preferable that the notification is made by sound such as “a high voltage power supply circuit is connected”.
Of course, even when the circuit of the high-voltage power supply is cut off after the collision, that fact may be notified by the fail indicator 18, the hazard lamp 19, the buzzer, voice or the like. For example, in the case of the fail indicator 18, if the high voltage power supply circuit is not cut off and the light is continuously turned on, the high voltage power supply circuit may be flashed when the high voltage power supply circuit is cut off. In the case of the hazard lamp 19, if the high voltage power supply circuit is not shut off, the special flashing may be performed, and if the high voltage power supply circuit is shut off, the normal flashing state may be set differently. it can. Further, in the case of voice, it may be notified that “the high voltage power supply circuit has been cut off due to a collision”.
[0025]
The remote control receiver 21 and the in-vehicle power switch 22 as high voltage system manual shut-off means are operated under predetermined conditions. As the operating conditions, here, the conditions under which the remote control receiver 21 and the in-vehicle power switch 22 are operated are as follows: (1) At the time of a car collision, (2) The high voltage power supply circuit is not shut off. (3) It is assumed that all of the fact that the vehicle is stopped (the vehicle speed is in a state of 0 for a predetermined period) is established.
[0026]
The operating conditions (1), (2), and (3) are set in this way because the high-voltage power supply circuit can be cut off to the minimum by limiting the high-voltage power supply circuit artificially to a minimum. In this case, (1) the case where the high voltage power supply circuit is not shut off at the time of (1) a car collision, and (3) the vehicle is stopped. This is based on the condition that all of the following conditions are satisfied (the vehicle speed is in a state of 0 for a predetermined period). In particular, the condition (3) is intended to avoid a problem that the circuit of the high voltage power supply is cut off during the evacuation travel and the travel becomes impossible.
[0027]
The remote control receiver 21 outputs a signal for instructing the main contactor 3 to shut off the circuit of the high-voltage power supply when it receives a shut-off command signal from an external remote controller (not shown) when the above operating conditions are satisfied. Alternatively, the other power connection switch is turned off (power cutoff). In the vehicle power switch 22, if the switch is operated when the above operating conditions are satisfied, a signal instructing the main contactor 3 to shut off the circuit of the high voltage power supply is output, or other power connection switch Is turned off (power is cut off).
[0028]
Since the high-voltage system interrupting device for an automobile as one embodiment of the present invention is configured as described above, for example, as shown in FIG. 2 and FIG. It is.
That is, as shown in the main routine of FIG. 2, when the key switch of the driving system of the automobile is turned on, the main contactor 3 is turned on (step a10), the collision estimation flag is cleared (step a20), and the interrupt is interrupted. Allowed (step a30).
[0029]
With this interruption permission, a deceleration determination routine as shown in FIG. 3 is periodically performed. That is, as shown in FIG. 3, the deceleration calculation unit 12b of the deceleration detection means 12 receives the vehicle speed signal from the vehicle speed sensor 12a (step b10), calculates the vehicle speed from this vehicle speed signal (step b20), Further, the deceleration is calculated based on the calculated vehicle speed (step b30). The collision detection power cut-off ECU 13 determines whether or not the calculated deceleration is greater than or equal to a preset set value (predetermined value) (step b40). If the calculated deceleration is greater than or equal to the set value, the collision estimation flag is set. (Step b50). Such set values are set in advance based on experiments or the like.
[0030]
Referring again to the main routine of FIG. 2, when the interrupt is permitted (step a30), it is determined whether or not the key switch is in the on state (step a40). If the key switch is not in the on state (that is, the key When the switch is turned off, the main contactor 3 is turned off (step a50) and the control is finished. If the key switch is on, it is determined whether or not collision detection information is input from the collision detection sensor 11 (that is, whether or not the collision detection sensor 11 is on) (step a60).
[0031]
If no collision detection information is input from the collision detection sensor 11, the process returns to step a40. Note that the determination in step a40 is performed at a predetermined cycle.
On the other hand, if collision detection information is input from the collision detection sensor 11, it is temporarily determined that the vehicle has collided and the main contactor 3 is turned off (step a70). Further, it is determined whether or not the collision estimation flag is set in the deceleration determination routine (FIG. 3) (step a80).
[0032]
If the collision estimation flag is set, it is determined that the vehicle has collided, and the main contactor 3 is kept off. Then, it is determined whether or not the vehicle speed V is less than the minute speed value V0 (that is, the vehicle is stopped) (step a82). If the vehicle speed V is not less than the minute speed value V0, that is, if the vehicle is not stopped, the timer value T is reset to 0 (step a84), and the process returns to step a40.
[0033]
If the vehicle speed V is less than the minute speed value V0, that is, if the vehicle is stopped, the process proceeds to step a86, the timer value T is increased by a predetermined value (control cycle) α, and the process proceeds to step a86. It is determined whether or not the value T has reached a predetermined time T1. If the timer value T does not reach the predetermined time T1, the process returns to step a40.
Here, when the timer value T reaches the predetermined time, it means that the vehicle has been stopped for the predetermined time T1, and it is determined whether or not the power cut-off signal is received (step a90). If the power cut-off signal is received, the fact that the power is cut off is notified by the fail indicator 18, the hazard lamp 19, the buzzer, voice, etc. (step a92). The failure indicator 18, hazard lamp 19, buzzer, voice, etc. are informed that they are not blocked (step a 94).
[0034]
In this way, when the vehicle collides, it is informed whether the power supply (high voltage power supply) is shut off after the vehicle stops, so that the occupant or rescuer shuts off the high voltage power supply circuit. If the circuit of the high-voltage power supply is shut off, appropriate accident handling can be performed promptly without worrying about the risk of leakage. When the circuit of the power supply is not interrupted, the subsequent measures can be performed in consideration of the possibility of electric leakage.
[0035]
Further, when the high-voltage power supply circuit is not shut off at the time of a car collision, when the high-voltage power supply circuit is cut off by a remote control switch (remote control) (not shown), the remote control receiver 21 causes the remote control receiver 21 to In response to the shut-off command signal, the main contactor 3 outputs a signal for commanding the shut-off of the high-voltage power supply circuit, or the other power connection switch is turned off (power-off). The circuit can be cut off, and the rescuer can promptly perform appropriate accident handling without worrying about the risk of electric leakage.
[0036]
Further, when the high-voltage power supply circuit is not shut off at the time of the collision of the automobile, the vehicle occupant outputs a signal for instructing the main contactor 3 to shut off the high-voltage power supply circuit by the in-vehicle power switch 22. Or by turning off the other power connection switch (power off), the high-voltage power circuit can be shut down, and the vehicle occupant can handle the accident appropriately without worrying about leakage. Can be performed promptly.
[0037]
In addition, as a predetermined condition for enabling the high voltage power circuit to be shut off by a remote control switch or the like, the vehicle stops when the automobile is in a collision and the high voltage power circuit is not shut off. The condition that the vehicle is in a state where the vehicle speed is 0 for a predetermined period of time avoids a problem that the circuit of the high-voltage power supply is cut off during the evacuation travel and the vehicle cannot travel.
[0038]
On the other hand, if the collision estimation flag is not set after the main contactor 3 is turned off due to provisional determination that the vehicle has collided, after the collision detection of the vehicle (after the collision detection sensor 11 is turned on), the collision estimation flag is not set. It is determined whether or not a predetermined time (here, 1 second) has elapsed (step a100). If the collision estimation flag is not set even after a predetermined time has elapsed after the vehicle collision is detected, the main contactor 3 is turned on (step a110) because the vehicle collision is erroneously determined, and the process returns to step a40.
[0039]
In this way, when the collision detection power cutoff ECU 13 receives the collision detection information from the collision detection sensor 11, it is temporarily determined that the vehicle has collided, and the main contactor 3 is immediately turned off to turn off the circuit of the high voltage power supply 2. 5 is cut off, it is possible to avoid the possibility of a vehicle fire or electric shock due to the high-voltage power supply being energized in the event of a collision.
[0040]
In addition, if the deceleration does not exceed a predetermined value within a predetermined time after the provisional determination that the vehicle has collided, the main contactor 3 is assumed to be an erroneous determination that the vehicle has collided. Since the circuit 5 of the high-voltage power supply 2 is reconnected with the power on, even if the circuit of the high-voltage power supply is interrupted due to a malfunction of the collision detection sensor 11, it is possible to ensure the driving power of the subsequent automobile. become able to.
[0041]
In addition, this invention is not limited to the above-mentioned embodiment, A various deformation | transformation is possible in the range which does not deviate from the meaning of this invention.
[0042]
【The invention's effect】
As described above, according to the high-voltage system cutoff device (claim 1) of the present invention, at the time of the collision of the vehicle, an occupant or a rescuer recognizes whether or not the circuit of the high-voltage power supply is cut off. If the circuit of the high voltage power supply is not cut off, the subsequent measures can be performed while considering the possibility of electric leakage. Therefore, an occupant or a rescuer can quickly take appropriate measures in the event of a car collision.
[0043]
Further, a high-voltage system manual shut-off means is provided for manually shutting off the high-voltage power supply circuit under a predetermined condition when the car is in a collision and the high-voltage power supply circuit is not shut off. For example, the high-voltage power supply manual shut-off means can be used to manually shut off the high-voltage power supply circuit and eliminate the risk of electric shock due to electric leakage, and then perform subsequent actions with a large degree of freedom. This makes it possible to quickly and appropriately perform treatment in the event of a car collision (claim 2).
[Brief description of the drawings]
FIG. 1 is a block diagram showing a main configuration of an automobile and a high-voltage system cutoff device for an automobile according to an embodiment of the present invention.
FIG. 2 is a flowchart of a main routine showing the operation of the high-voltage system cutoff device for an automobile according to one embodiment of the present invention.
FIG. 3 is a flowchart of a subroutine showing the operation of the high-voltage system cutoff device for a vehicle according to the embodiment of the present invention.
[Explanation of symbols]
1 Driving motor 2 Main battery (high voltage power supply)
3 Main contactor 4 Motor controller 5 High voltage power supply circuit 6 High voltage system 10 High voltage system shut-off device 11 Collision detection sensor (collision detection means)
12 Vehicle speed detection means (vehicle speed sensor)
13 Collision detection power cut-off ECU (high voltage system cut-off control means)
14 High Voltage System Shutdown Control Unit 15 Power Supply Circuit Shutdown State Determination Unit 16 Notification Unit 17 Notification Control Unit 18 Fail Indicator 19 Hazard Lamp 21 Remote Control Receiver 22 as High Voltage System Manual Shutdown Unit 22 Vehicle Power Supply as High Voltage System Manual Shutdown Unit switch

Claims (7)

A collision detection means for detecting a collision of a vehicle that obtains driving force by a high voltage power supply;
High voltage system shutoff control means for controlling the circuit of the high voltage power supply to be shut off at the time of a collision of the vehicle based on a collision detection signal from the collision detection means;
A power supply circuit interruption state determination means for determining whether or not the high voltage power supply circuit is interrupted by the high voltage system interruption control means at the time of the collision of the automobile;
And a notification means for notifying that the high-voltage power supply circuit is not shut off by the high-voltage system shut-off control means based on determination information from the power supply circuit shut-off state detecting means. , High voltage system shut-off device for automobiles.   The notification means turns on the indicator lamp only when the circuit of the high-voltage power supply is not executed by the high-voltage system shut-off control means, and turns off the lamp otherwise. When the high-voltage power supply circuit is not shut off by the voltage system shut-off control means, the hazard lamp is informed by performing special flashing at a rhythm different from the normal flashing state.
The high-voltage system cutoff device for an automobile according to claim 1, wherein   When the collision detection means detects a collision, the high voltage system shutoff control means temporarily shuts off the circuit of the high voltage power source, and thereafter, when a deceleration exceeding a predetermined value does not occur within a predetermined time after the collision is detected. Or, when the vehicle speed does not keep 0 for a certain time within a predetermined time after collision detection, reconnect the high voltage power supply circuit.
The high-voltage system interrupting device for an automobile according to claim 1 or 2, characterized by the above.   The power supply circuit cutoff state determination means is configured to detect the high-speed signal when a deceleration greater than or equal to a predetermined value occurs within a predetermined time after the collision is detected, or when the vehicle speed is maintained at 0 for a predetermined time or more within a predetermined time after the collision detection. It is determined whether or not the high-voltage power supply circuit is shut off by the voltage system shut-off control means, and whether or not the high-voltage power supply circuit is shut off by the high-voltage system shut-off control means is notified.
The high-voltage system interrupting device for an automobile according to claim 3, wherein   The high voltage system shutoff control means detects the collision, and when the deceleration more than a predetermined value occurs or the vehicle speed becomes zero within a predetermined time after the collision detection, To block
The high-voltage system interrupting device for an automobile according to claim 1 or 2, characterized by the above. There is provided a high-voltage system manual shut-off means for manually shutting off the high-voltage power supply circuit under a predetermined condition when the car is in a collision and the high-voltage power supply circuit is not shut off. The high-voltage system cutoff device for an automobile according to any one of claims 1 to 5, wherein   The predetermined condition is that the vehicle is at a time when the automobile is in a collision and that the high-voltage power supply circuit is not shut off.
The high-voltage system cutoff device for an automobile according to claim 6, wherein

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