JP2009113554A - Short circuit detection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a short circuit detection system for surely detecting a short circuit of a panel and a power source line and the like in a moving body of which the main body is constituted by combining predetermined panels. <P>SOLUTION: The short circuit detection system is provided with carbon panels, a ground wire, a current detection part and a short circuit current determination part. In the ground wire, its one end is connected to a carbon panel and the other end is connected to the ground. The current detection part detects a current value through the ground wire. The short circuit current determination part determines that a short circuit current flows through the carbon panel according to the current value detected by the current detection part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a short circuit detection system, and more particularly to a short circuit detection system provided in a moving body such as a vehicle.

  Conventionally, there is a system that supplies electric power from a battery mounted on a moving body such as a vehicle to an electric load via a power supply line. For example, as shown in FIG. 5, electric power is supplied to the electric load 7 from the battery 5 mounted in the vehicle via a power line. Here, a fuse 6 is provided on the power supply line from the battery 5 to the electric load 7. The fuse 6 monitors the current state from the battery 5 to the electric load 7, and cuts off the power supply to the electric load 7 when an overcurrent, a short-circuit current, or the like flows. For example, in the fuse 6, when a current of a predetermined value or more flows, the fusible body is blown or cut off. Providing such a fuse 6 can prevent damage to the system due to overcurrent or short-circuit current.

On the other hand, an apparatus for detecting that the wire harness is grounded is disclosed (for example, see Patent Document 1). The device disclosed in Patent Document 1 is provided with an exterior protective material for protecting the electric wire of the wire harness, and detects that the exterior protective material is grounded to the vehicle body.
Japanese Patent Laid-Open No. 7-104024

  However, when the vehicle body is configured with a carbon panel or the like having a certain degree of conductivity, the current monitoring method described above may become unstable. For example, as shown in FIG. 5, a plurality of carbon panels 9a to 9c are connected to form a vehicle body, and a part of them (the carbon panel 9b in the example of FIG. 5) and the power supply line are short-circuited. Think about the case. In this case, the electrical resistance value of the connection portion may fluctuate from the initial value due to the change with time of the connection portion between the carbon panels 9a to 9c. Therefore, as shown in FIG. 5, when the power supply line and the carbon panel 9b are short-circuited, the resistance value until the power supply line is grounded via the carbon panels 9a to 9c becomes unstable. The protection system against overcurrent and short circuit current may not function. As a result, problems such as inability to supply sufficient electric power to the electric load 7, a decrease in the amount of power stored in the battery 5, damage to the power supply line, and heating of the connection portions of the carbon panels 9a to 9c and the panel itself may occur. is there.

  Moreover, although the apparatus disclosed by the said patent document 1 has detected that the exterior protective material contacted the vehicle body, when an exterior protective material and a carbon panel contacted, the fluctuation | variation of the electrical resistance value mentioned above The same phenomenon occurs. Therefore, even with the apparatus disclosed in Patent Document 1, contact detection may not work effectively. In addition, the device disclosed in Patent Document 1 needs to cover the power supply line with an exterior protection material, and cannot detect a short circuit between the power supply line that is not covered with the exterior protection material and the carbon panel.

  Therefore, an object of the present invention is to provide a short-circuit detection system that reliably detects a short circuit between a panel and a power supply line or the like in a moving body in which a main body is configured by combining predetermined panels.

In order to achieve the above-described object, the present invention has the following features.
1st invention is the short circuit detection system mounted in a moving body. The short circuit detection system includes a carbon panel, a ground wire, a current detection unit, and a short circuit current determination unit. The ground wire had one end connected to the carbon panel and the other end grounded. The current detection unit detects a current value flowing through the ground wire. The short circuit current determination unit determines that a short circuit current has flowed through the carbon panel according to the current value detected by the current detection unit.

  In a second aspect based on the first aspect, a plurality of carbon panels are connected and mounted in the moving body. A plurality of ground wires are provided, and one end of each is connected to each of the plurality of carbon panels. The current detection unit detects a total of current values flowing through the plurality of ground wires. The short-circuit current determination unit determines that a short-circuit current has flowed to any one of the plurality of carbon panels according to the total of the current values detected by the current detection unit.

  In a third aspect based on the first aspect, a plurality of carbon panels are connected and mounted in the moving body. A plurality of ground wires are provided, and one end of each is connected to each of the plurality of carbon panels. The current detection unit detects current values flowing through the plurality of ground wires. The short-circuit current determination unit determines that the short-circuit current has flowed through the plurality of carbon panels and the carbon panel in which the short-circuit current has flowed from the plurality of carbon panels according to the respective current values detected by the current detection unit. .

  According to a fourth invention, in any one of the first to third inventions, the short circuit current determination unit is based on a current value flowing through the ground wire measured in a state where the short circuit current does not flow through the carbon panel. Using the set threshold value, when the current value detected by the current detection unit exceeds the threshold value, it is determined that a short-circuit current has flowed through the carbon panel.

  In a fifth aspect based on the fourth aspect, the short-circuit current determination unit is short-circuited to the carbon panel when the number of times that the current value detected by the current detection unit exceeds the threshold is a predetermined number of times or more. It is determined that a current has flowed.

  According to a sixth aspect of the present invention, in the fourth aspect, the short-circuit current determination unit has a short-circuit current applied to the carbon panel when the time during which the current detection unit detects a current value exceeding the threshold value has reached a predetermined time. Is determined to have flowed.

  According to a seventh invention, in any one of the first to third inventions, a notification unit is further provided. When the short-circuit current determination unit determines that the short-circuit current has flowed through the carbon panel, the notification unit notifies the occupant of the mobile body that the short-circuit current has flowed.

  According to an eighth aspect of the present invention, in any one of the first to third aspects of the present invention, a ground terminal is crimped to one end of the ground wire. The short circuit detection system includes an insert and a fixing member. Part of the insert is embedded in the carbon panel. The fixing member is joined to the insertion body, sandwiches the ground terminal, and fixes the ground terminal to the insertion body.

  According to the first aspect, since a short-circuit current flowing on the carbon panel side is detected, it is possible to reliably detect a short circuit between the carbon panel and the power supply line. Further, since the carbon panel is grounded via the ground wire, the resistance value until the carbon panel is grounded via the carbon panel is stabilized. In addition, since the resistance value varies very little from the initial value due to a change with time, it is possible to stably detect a short circuit between the carbon panel and the power supply line.

  According to the second aspect of the present invention, when a plurality of carbon panels are connected and mounted in a moving body, a short circuit between one of the carbon panels and a power supply line is reliably detected by detecting the total current value. can do.

  According to the third invention, by detecting the current flowing through each ground wire, the location where the power supply line is short-circuited is clarified. Therefore, the range for investigating the short-circuit location is narrowed, and the work for repairing the short-circuit location is performed. Becomes easy.

  According to the fourth aspect of the present invention, in the case of a moving body in which a certain amount of current flows through the carbon panel in a state where no short circuit current flows, the short circuit current can be detected in consideration of the current.

  According to the fifth aspect of the present invention, it is possible to prevent a single increase in current value generated other than the short-circuit current from being erroneously determined as a short-circuit current.

  According to the sixth aspect of the present invention, it is possible to prevent a sudden increase in current value that occurs other than the short-circuit current from being erroneously determined as a short-circuit current.

  According to the seventh aspect, when a short circuit to the carbon panel is detected, a short circuit abnormality can be notified to the occupant of the moving body.

  According to the eighth aspect of the present invention, since the electrical resistance value between the insert and the carbon panel is stable and the deterioration is extremely small, the electrical conductivity until the grounding from the carbon panel through the ground wire changes with time. Can be suppressed.

  Hereinafter, with reference to FIG. 1, the short circuit detection system which concerns on one Embodiment of this invention is demonstrated. Typically, at least a part of a moving body main body such as a vehicle has a structure in which a carbon panel is connected, and the short-circuit detection system is mounted in the moving body. FIG. 1 is a schematic configuration diagram illustrating a configuration example of a panel structure and a short circuit detection system constituting the vehicle main body, taking a vehicle as an example.

  In FIG. 1, the short circuit detection system includes a plurality of panels 1a to 1c, connection units 2a to 2c, ground wires 3a to 3c, a current detection unit 10a, a short circuit current determination unit 11a, and a warning notification unit 12a. A plurality of panels 1a to 1c are combined to constitute a vehicle body. For example, the panels 1a to 1c are carbon panels each having a certain degree of conductivity, and are hereinafter referred to as carbon panels 1a to 1c. The carbon panels 1a to 1c are connected to ground wires 3a to 3c, respectively, and are grounded to the ground plate 8 via the current detection unit 10a. In addition, the structure of the connection part 2a-2c which connects the carbon panels 1a-1c and the earth wires 3a-3c, respectively, and the detailed structure of the connection part which connects between the carbon panels 1a-1c are mentioned later. In addition, when the carbon panels 1a to 1c, the connection portions 2a to 2c, and the ground wires 3a to 3c are generically referred to, they will be referred to as the carbon panel 1, the connection portion 2, and the ground wire 3 in the following description.

  The current detection unit 10a detects the total amount of current flowing from the ground wires 3a to 3c to the ground plate 8. For example, the current detection unit 10a is configured by a current sensor having a predetermined measurement resistance, measures the total current flowing from the ground wires 3a to 3c to the ground plate 8, and outputs the result to the short-circuit current determination unit 11a. . The current detection unit 10a corresponds to an example of the current detection unit of the present invention.

  The short circuit current determination part 11a determines whether the said power supply line short-circuited with either of the carbon panels 1a-1c using the electric current measurement result output from the electric current detection part 10a. And the warning alerting | reporting part 12a emits the warning sound which shows the short circuit, or the warning light which shows the short circuit, when the short circuit current determination part 11a determines that the said power supply line shorted with either of the carbon panels 1a-1c. The short circuit is notified to the vehicle occupant by turning on the light. For example, the short circuit current determination part 11a is comprised by control parts, such as a microcomputer. In addition, the warning notification unit 12a includes a voice output unit such as a speaker and a warning lamp lighting unit such as a warning lamp for informing the passenger.

  In addition, a system for supplying electric power from a battery to each electric load via a power line is mounted in the vehicle. In the example of FIG. 1, electric power is supplied from the battery 5 mounted on the vehicle to the electric load 7 through the power line. The battery 5 and the electric load 7 are grounded to the ground plate 8 respectively. A fuse 6 is provided on the power line from the battery 5 to the electric load 7. The fuse 6 monitors the current state from the battery 5 to the electric load 7, and cuts off the power supply to the electric load 7 when an overcurrent, a short-circuit current, or the like flows. For example, the fuse 6 cuts off the power supply to the electric load 7 by melting or cutting off the fusible body when a current of a predetermined value or more flows.

  With reference to FIG. 2 and FIG. 3, the structure of the connection parts 2a-2c and the structure of the connection part which connects between the carbon panels 1a-1c are demonstrated. FIG. 2 is a side view showing the structure of the carbon panels 1a to 1c having the connecting portions 2a to 2c. FIG. 3 is a side sectional view showing an example of a detailed structure of the connecting portion 2a. In FIG. 2, only the connection portions 2 a and 2 b are illustrated among the connection portions 2 a to 2 c illustrated in FIG. 1.

  In FIG. 2, the carbon panels 1 a to 1 c are resinous plate-like members containing carbon (carbon) therein, and are members having a certain degree of conductivity (for example, 0 to 300 Ω (ohms)). For example, the carbon panels 1a to 1c are connected to each other and used for parts on the vehicle body structure of the vehicle, panels inside the vehicle body, interior parts, and the like.

  Carbon panel 1a and carbon panel 1b are fastened by rivets 4ab. Moreover, the carbon panel 1b and the carbon panel 1c are fastened by rivets 4bc. An adhesive is applied to the surface where the carbon panel 1a and the carbon panel 1b are in contact with each other and the surface where the carbon panel 1b and the carbon panel 1c are in contact with each other. Here, the rivets 4ab and 4bc have a shaft portion and heads at both ends of the shaft portion when mounted on the carbon panels 1a to 1c. Specifically, the rivets 4ab and 4bc have their respective head portions inserted into holes formed in the end portions of the carbon panels 1a to 1c, and the shaft ends of the shaft portions are caulked. Form a joint. In the example shown in FIG. 2, the carbon panels 1a to 1c are fastened using the rivets 4ab and 4bc, but the carbon panels 1a to 1c may be connected using other members. For example, the carbon panels 1a to 1c may be fastened using bolts or nuts instead of the rivets 4ab and 4bc.

  Connection portions 2a to 2c are portions that electrically connect carbon panels 1a to 1c and ground wires 3a to 3c, respectively. For example, as shown in FIG. 2, the connecting portion 2a includes an insert nut 21a and a bolt 22a. The connecting portion 2b includes an insert nut 21b and a bolt 22b. And earth terminal 31a and 31b are crimped | bonded to the carbon panel side front-end | tip of earth wire 3a and 3b, respectively. In addition, since the structures of the connection portions 2a to 2c are the same, the structure of the connection portion 2a will be described as a representative with reference to FIG. In addition, when the insert nuts 21a to 21c, the bolts 22a to 22c, and the ground terminals 31a to 31c are collectively referred to as the insert nut 21, the bolt 22, and the ground terminal 31, respectively.

  In FIG. 3, the insert nut 21 a is made of a metal such as brass, stainless steel, aluminum alloy, or iron, and has an internal thread that opens at least on one end face side. Further, the insert nut 21a is formed with a collar portion on the other end side for preventing the insert nut 21a from falling off the carbon panel 1a. The insert nut 21a is insert-molded and fixed in the carbon panel 1a when the carbon panel 1a is molded. At this time, a part of the insert nut 21a on the one end face side (that is, the female screw opening side) is exposed from the surface of the carbon panel 1a, and the other part is embedded in the carbon panel 1a for insert molding. The

  The ground terminal 31a is crimped to one end of the ground wire 3a. The ground terminal 31b is fastened and fixed to the one end face of the insert nut 21a by a bolt 22a. The bolt 22a fixes the ground terminal 31a to the insert nut 21a by sandwiching a predetermined washer and the ground terminal 31a and screwing with a female screw of the insert nut 21a.

  Thus, the ground wire 3a is connected to the carbon panel 1a via the insert nut 21a. Therefore, the carbon panel 1a is electrically connected to the ground plate 8 (see FIG. 1) via the current detection unit 10a. Similarly, ground wires 3b and 3c are connected to carbon panels 1b and 1c via insert nuts 21b and 21c, respectively. Therefore, the carbon panels 1b and 1c are also electrically connected to the ground plate 8 via the current detection unit 10a.

  Note that the above-described insert nut 21 is prevented from falling off the carbon panel 1 by forming a flange portion on the other end side, but may be prevented from falling off in other modes. For example, grooves, vertical streaks (flat stitches), lattice-shaped streaks (twist eyes), or the like may be formed on the side surface of the insert nut 21 to prevent the carbon nut 1 from falling off.

  Moreover, although the insert nut 21 mentioned above is insert-molded and fixed when the carbon panel 1 is molded, it may be fixed to the carbon panel 1 by other methods. For example, the insert nut 21 may be press-fitted or heat-fitted into a boss hole formed in the carbon panel 1 and the insert nut 21 may be fixed to the carbon panel 1.

  Further, instead of the insert nut 21 described above, a stud bolt may be fixed to the carbon panel 1. In this case, the ground terminal 31 is fixed to the stud bolt by a nut screwed with the stud bolt. As a first example, the ground terminal 31 is sandwiched between the nut and the surface of the carbon panel 1 and fixed to the stud bolt. As a second example, the ground terminal 31 is sandwiched between a ring-shaped member loosely penetrated by a stat bolt and the nut and fixed to the stud bolt. As a third example, the ground terminal 31 is sandwiched between two nuts that are screwed to the stat bolt and fixed to the stud bolt. Even when the stud bolt is fixed to the carbon panel 1 in this way, the ground wire 3 is connected to the carbon panel 1 via the stud bolt.

  Next, a short circuit detection method in the current detection unit 10a, the short circuit current determination unit 11a, and the warning notification unit 12a will be described. In general, a certain amount of current often flows in the body structure of a vehicle even if each electrical device mounted on the vehicle is connected so as not to actively take a body ground. For example, if the vehicle steering or accelerator cable has a structure in contact with any one of the carbon panels 1a to 1c, currents from other mechanisms such as the engine flow to the carbon panels 1a to 1c via these components. Therefore, even if the carbon panels 1a to 1c and the power supply line are not short-circuited, current flows to the carbon panels 1a to 1c (hereinafter referred to as normal current), and the current detection unit 10a. Will detect the normal current.

  In the present embodiment, a threshold value for distinguishing between the normal current and the short-circuit current when the carbon panels 1a to 1c and the power supply line are short-circuited is set based on the data of the normal current for each vehicle. To do. For example, the normal current is monitored for each vehicle, and an upper limit value (for example, an average value + 3σ (standard deviation) or + 4σ) based on the maximum value or variation of the normal current is set as the threshold value. And the short circuit current determination part 11a memorize | stores the said threshold value beforehand in the memory | storage means which is not shown in figure, and judges that it is a short circuit current, when the electric current value detected by the electric current detection part 10a exceeds the said threshold value.

  As a first example, when the current value detected by the current detection unit 10a exceeds the threshold, the short-circuit current determination unit 11a immediately determines that the current value is a short-circuit current, and the power supply line is short-circuited. The warning notification unit 12a notifies this to the passenger. As a second example, the short-circuit current determination unit 11a determines that the number of times that the current value detected by the current detection unit 10a exceeds the threshold value is a predetermined number of times, that is, the threshold value. When the exceeding current value is detected a plurality of times, it is determined that the current value is a short-circuit current, and the warning notification unit 12a notifies the occupant that the power supply line is short-circuited. As a third example, when the time when the current value detected by the current detection unit 10a exceeds the threshold reaches a predetermined time, the short circuit current determination unit 11a is the short circuit current. The warning notification unit 12a notifies the occupant that the power supply line is short-circuited.

  The threshold value may be adjusted according to a change in normal current due to a change in the vehicle over time. For example, the above-described monitoring result and normal current variation data are stored in the short-circuit current determination unit 11a, and subsequent normal current change is learned and controlled. For example, the short-circuit current determination unit 11a resets the threshold value by appropriately resetting the average value and the standard deviation according to a change with time of the normal current. As described above, by appropriately correcting the threshold value, the normal current increases as the normal current is mistakenly detected as a short-circuit current, and the normal current is decreased as the short-circuit current is determined. It is possible to prevent a detection error that cannot be made.

  As described above, since the short circuit detection system according to the embodiment detects the short circuit current flowing on the carbon panel 1 side, the short circuit between the carbon panel 1 and the power supply line can be reliably detected, and the occupant can be surely detected. It is possible to notify the short circuit abnormality. Further, since the carbon panel 1 is connected to the ground plate 8 via the connection portion 2, the current detection portion 10a, and the ground wire 3, the resistance value until the carbon panel 1 is grounded via the carbon panel 1 is stabilized. . In addition, since the resistance value varies very little from the initial value due to a change with time, a short circuit between the carbon panel 1 and the power supply line can be detected stably.

  In addition, you may each detect the electric current which flows into each earth wire 3a-3c. Hereinafter, with reference to FIG. 4, the short circuit detection system which each detects the electric current which flows through each earth wire 3a-3c is demonstrated. FIG. 4 is a schematic configuration diagram illustrating a configuration example of the short-circuit detection system.

  In FIG. 4, the short-circuit detection system that detects the current flowing through each of the ground wires 3 a to 3 c is different from the short-circuit detection system described above in the ground wire, the current detection unit, the short-circuit current determination unit, and the warning notification unit. . Hereinafter, the same components as those of the short-circuit detection system described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  The current detection unit 10b detects each current flowing from the ground wires 3a to 3c to the ground plate 8, and outputs the detected current to the short circuit current determination unit 11b. For example, the current detection unit 10b includes a plurality of current sensors 101a to 101c each having a predetermined measurement resistance. The current sensor 101a measures the current flowing from the ground wire 3a to the ground plate 8, The result is output to the short-circuit current determination unit 11b. Moreover, the current sensor 101b measures the current flowing from the ground wire 3b to the ground plate 8, and outputs the result to the short-circuit current determination unit 11b. The current sensor 101c measures the current flowing from the ground wire 3c to the ground plate 8, and outputs the result to the short-circuit current determination unit 11b.

  The short-circuit current determination unit 11b determines whether the power line from the battery 5 to the electric load 7 is short-circuited to the carbon panels 1a to 1c using each current measurement result output from the current detection unit 10b. It is specified whether the carbon panels 1a to 1c are short-circuited. And the warning alerting | reporting part 12b emits the warning sound which shows the short circuit and a short circuit panel, when the short circuit current determination part 11b determines that the said power supply line short-circuited with the carbon panels 1a-1c, or the short circuit and the short circuit panel By turning on the warning lamp shown, the vehicle occupant is notified of the short circuit and the short circuit location. For example, the short circuit current determination unit 11b is configured by a control unit such as a microcomputer. Further, the warning notification unit 12b includes a voice output unit such as a speaker for warning a vehicle occupant, a warning lamp lighting unit such as a warning lamp, and the like.

  As an example, when the warning notification unit 12b has a voice output unit, the warning notification unit 12b reproduces a voice indicating that the power supply line is short-circuited, and indicates the short-circuited portion (short-circuited carbon panel 1). Audio is also played back to inform the occupant. As another example, in the case where the warning notification unit 12b has a warning light lighting unit, by turning on the warning light provided for each of the carbon panels 1a to 1c, Informs the occupant that the short circuit has occurred.

  Next, a short circuit detection method in the current detection unit 10b, the short circuit current determination unit 11b, and the warning notification unit 12b will be described. As described above, a certain amount of current often flows in the body structure of a vehicle even if each electrical device mounted on the vehicle is connected so as not to take positive body ground. Therefore, even when the carbon panels 1a to 1c and the power supply line are not short-circuited, a normal current flows to the carbon panels 1a to 1c, and the current detection unit 10b also detects the normal current. End up.

  When detecting the current values of the ground wires 3a to 3c, respectively, the normal time current flowing through the carbon panels 1a to 1c, the carbon panel 1a to 1c, and the power A threshold value for distinguishing the short-circuit current when the wire is short-circuited is set for each of the ground wires 3a to 3c. For example, the normal current is monitored for each of the carbon panels 1a to 1c of the vehicle, and an upper limit value (for example, an average value + 3σ (standard deviation) or + 4σ based on the maximum value or variation of the normal current). ) And the like are set as the threshold values. And the short circuit current determination part 11b has memorize | stored the said threshold value beforehand in the memory | storage means which is not shown in figure, and when the electric current value which the electric current detection part 10b detected exceeded the threshold value set for every earth wire 3a-3c, It judges that it is a short circuit current, and specifies carbon panel 1a-1c in which the short circuit current flowed. Note that the method for determining that the power supply line is short-circuited to each of the carbon panels 1a to 1c and the method for adjusting the threshold according to the change in the normal current due to the time-dependent change of the vehicle are the same as the short-circuit detection system described above. Detailed description will be omitted.

  In this way, by detecting the current flowing through each of the ground wires 3a to 3c, in addition to the effect of the short-circuit detection system described above, it is possible to further clarify the location where the power line is short-circuited. The scope for investigating the short-circuited portion is narrowed, and the work for repairing the short-circuited portion becomes easy.

  In addition, although the example which alert | reports a short circuit location with the short circuit warning was shown in the short circuit detection system which each detects the electric current which flows through each earth wire 3a-3c, you may be another alerting | reporting aspect. For example, when a short circuit with a power supply line is detected, only a short circuit warning is notified to the occupant, and data indicating the short circuit location may be stored as data in the storage unit of the short circuit current determination unit 11b. When repairing a short-circuited part, if the short-circuited part data stored in the short-circuit current determination unit 11b is read out, it becomes possible to narrow down the investigation part of the short-circuited part in the same manner as the notification mode described above. Work becomes easier.

  Moreover, in the short circuit detection system mentioned above, although the short circuit current determination parts 11a and 11b were comprised by the microcomputer etc., you may comprise by sharing with another control part. For example, when another control unit is already installed in the vehicle, the control unit acquires the current value information from the current detection unit 10a or 10b described above, and operates the short-circuit current determination units 11a and 11b. It doesn't matter. Needless to say, the warning notification units 12a and 12b may be provided in common with the voice output means and warning lamp lighting means for other uses already installed in the vehicle. Yes.

  Moreover, although the example which comprises the electric current detection parts 10a and 10b mentioned above by the current sensor which has predetermined | prescribed measurement resistance was shown, the electric current which flows through the earth wire 3 may be detected by another system. For example, the current detection units 10a and 10b may detect a voltage applied to both ends of the resistor by inserting a resistor between the ground wire 3 and the ground plate 8.

  The various resistance values described above are merely examples, and it goes without saying that the present invention can be realized even with other values.

  In the above description, an example in which the short-circuit detection system according to the embodiment is installed in a vehicle is used. However, the short-circuit detection system according to the embodiment may be used for a short-circuit detection system of another moving body on which a power source and an electric device are mounted. Absent. For example, the short circuit detection system of the present invention can be used for various moving bodies such as airplanes and ships in addition to vehicles such as passenger cars, large vehicles, and two-wheeled vehicles.

  Although the present invention has been described in detail above, the above description is merely illustrative of the present invention in all respects and is not intended to limit the scope thereof. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention.

  The short-circuit detection system according to the present invention can reliably detect a short-circuit between the panel and a power supply line or the like in a moving body in which a main body is configured by combining predetermined panels, and is equipped with a power source and an electric device. It can be applied to short-circuit detection systems such as moving objects.

The schematic block diagram which shows the structural example of the short circuit detection system which concerns on one Embodiment of this invention. The side view which shows the structure of carbon panel 1a-1c which has the connection parts 2a-2c of FIG. Side sectional view which shows an example of the detailed structure of the connection part 2a of FIG. The schematic block diagram which shows the other structural example of the short circuit detection system which concerns on one Embodiment of this invention. Schematic configuration diagram showing a configuration example of a conventional panel structure and power supply system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Carbon panel 2 ... Connection part 21 ... Insert nut 22 ... Bolt 3 ... Ground wire 31 ... Ground terminal 4 ... Rivet 5 ... Battery 6 ... Fuse 7 ... Electric load 8 ... Earth plate 10 ... Current detection part 101 ... Current sensor 11 ... Short-circuit current determination unit 12 ... Warning notification unit

Claims (8)

A short-circuit detection system mounted on a moving body,
Carbon panels,
An earth wire having one end connected to the carbon panel and the other end grounded;
A current detector for detecting a current value flowing through the ground wire;
A short-circuit detection system comprising: a short-circuit current determination unit that determines that a short-circuit current has flowed through the carbon panel according to a current value detected by the current detection unit. A plurality of the carbon panels are connected and mounted in the moving body,
A plurality of the ground wires are provided, each one end of which is connected to each of the plurality of carbon panels,
The current detection unit detects a total of current values flowing through the plurality of ground wires,
The short-circuit detection according to claim 1, wherein the short-circuit current determination unit determines that a short-circuit current has flowed to any one of the plurality of carbon panels according to a total of current values detected by the current detection unit. system. A plurality of the carbon panels are connected and mounted in the moving body,
A plurality of the ground wires are provided, each one end of which is connected to each of the plurality of carbon panels,
The current detection unit detects a current value flowing through the plurality of ground wires,
The short-circuit current determination unit is configured such that a short-circuit current flows through the plurality of carbon panels according to each current value detected by the current detection unit, and the short-circuit current flows from the plurality of carbon panels. The short circuit detection system according to claim 1, wherein the panel is determined.   The short circuit current determination unit uses the threshold value set based on the current value flowing through the ground wire measured in a state where no short circuit current flows through the carbon panel, and the current detection unit detects the threshold value. The short circuit detection system according to claim 1, wherein when the current value exceeds, it is determined that a short circuit current has flowed through the carbon panel.   The short-circuit current determination unit determines that a short-circuit current has flowed through the carbon panel when the number of times the current value detected by the current detection unit exceeds the threshold is a predetermined number of times or more. 5. The short circuit detection system according to 4.   The short circuit current determination unit determines that a short circuit current has flowed through the carbon panel when a time during which the current detection unit detects a current value exceeding the threshold value reaches a predetermined time. Short circuit detection system as described in.   The information processing apparatus according to claim 1, further comprising: a notification unit that notifies the occupant of the mobile body that the short circuit current has flowed when the short circuit current determination unit determines that the short circuit current has flowed through the carbon panel. The short circuit detection system as described in any one. The ground wire has a ground terminal crimped to one end thereof,
The short circuit detection system includes:
An insert part of which is embedded in the carbon panel;
4. The short-circuit detection system according to claim 1, further comprising: a fixing member that is joined to the insert and sandwiches the ground terminal to fix the ground terminal to the insert.

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