JP2012104381A - Charging cable with function of determining whether or not vehicle runs upon charging cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charging cable with the function of determining whether or not a vehicle runs upon the charging cable, which facilitates the determination of the necessity or unnecessity of replacement by enabling a person to determine whether or not the vehicle runs upon the charging cable incapable of having an internal state checked from an external appearance.SOLUTION: In a charging cable 11 with the function of determining whether or not a vehicle runs upon the charging cable, a pressure detection wire 17 is provided along an electric wire 15 in a sheath 13. The pressure detection wire 17 comprises a drain wire 29 to be contacted, which is disposed in a linear body 27 made of a foamed material 27a, and an edged drain wire 33 that is disposed along the drain wire 29 to be contacted in the foamed material 27a and that has an edge. The edged drain wire 33 has the edge disposed in the state of facing the drain wire 29 to be contacted via the foamed material 27a.

Description

  The present invention relates to a charging cable with a vehicle ride-on discrimination function that can tell whether or not the vehicle has been stepped on.

  Patent Document 1 discloses a distribution line disconnection detection method and apparatus for detecting a disconnection failure in a distribution line. This distribution line disconnection detection device is provided with a pair of insulation operation rods, each provided with a detection fitting to be brought into contact with the live line charging part of the distribution line, and a voltage dividing resistor connected thereto, and a lead wire is provided between the insulation operation rods. It is provided, and the divided voltage of the distribution line is drawn to one insulating operation rod side, and the divided voltage is measured by a voltage measuring unit provided on the insulating rod to obtain a disconnection display.

  Patent Document 2 discloses a circuit for detecting disconnection of a ground wire of an automotive charging cable including a first power wire, a second power wire, and a ground wire. The disconnection detection circuit includes a first detection circuit that detects a line voltage between the ground line and the first power supply line, and a second detection circuit that detects a line voltage between the ground line and the second power supply line. These detection circuits both have equal voltage dividing resistors, and a diode is interposed between each voltage dividing resistor and the power supply line. As a result, even when the power supply voltage is different, the same potential difference appears at the detection point. Therefore, it is possible to easily and accurately detect the disconnection of the ground wire both at the time of 100V charging and at the time of 200V charging. By interposing a diode between the cable and the line, it is possible to prevent the line voltage from entering the detection circuit when the ground line is disconnected. Yes.

JP 2000-171508 A JP 2010-124578 A

  By the way, as shown in FIG. 6, for example, a conventional automobile charging cable 501 of 30 to 150 A includes a first power supply line 505, a second power supply line 507, a ground line 509, a signal line in an insulator 503. 511 are provided and these are covered by a sheath 513. The car charging cable 501 is attached to a charging stand 515 for an electric car as shown in FIG. 7 and a dedicated connector 517 is connected to the tip of the car charging cable 501, so that the car 519 may be stepped on. If the vehicle charging cable 501 is stepped on a vehicle 519 having a vehicle weight of about 10 t or more, the sheath 513 and the insulator 503 may be damaged. For this reason, when the vehicle is stepped on a vehicle 519 having a vehicle weight of about 10 tons or more, it is necessary to replace the cable. However, in the above-described conventional disconnection detection device and disconnection detection circuit, if the disconnection does not occur, it is necessary to replace the cable. I do not understand. In addition, since it is difficult to understand from the appearance of the cable that the vehicle 519 has been stepped on, there is a problem that it is difficult to determine whether or not replacement is necessary.

  The present invention has been made in view of the above situation, and the object of the present invention is to make it possible to determine whether or not the vehicle has stepped on a charging cable that cannot be seen from the appearance, and can easily determine whether or not replacement is necessary. The object is to provide a charging cable with a vehicle riding determination function.

The above object of the present invention is achieved by the following configuration.
(1) A charging cable with a vehicle climbing discrimination function in which a pressure detection line is provided along an electric wire in a sheath, the pressure detection line being covered in a linear body made of a foam material. A contact drain wire; and an edged drain wire disposed along the contacted drain wire in the foamed material, the edged drain wire having the edge interposed with the foamed material. A charging cable with a vehicle riding discrimination function, wherein the charging cable is disposed opposite to the contacted drain wire.

  According to this charging cable with vehicle climbing discrimination function, the foam material used for the pressure detection line is more flexible than the insulator material of the electric wire, so when pressure is applied to the charging cable with vehicle climbing discrimination function, Before the electric wire is deformed, the foam of the pressure detection line is deformed. Due to the deformation of the foam material, the distance between the drain wire with the edge and the drain wire to be contacted is reduced. Since the edge of the edged drain wire has a sharp tip, the foamed material is cut and the drained wire with the edge comes into contact with the contacted drain wire. Accordingly, it is possible to determine that the vehicle has been boarded by detecting contact between the two lines.

(2) The charging cable with a vehicle climbing discrimination function according to (1), wherein the pressure detection line is formed by surrounding the contacted drain wire by four edge-attached drain wires that are equally spaced in a circumferential direction. A charging cable with a vehicle on-board discrimination function, characterized by comprising:

  According to this charging cable with a vehicle climbing determination function, when pressure on the inner side in the radial direction is applied from an arbitrary position in the circumferential direction of the charging cable with a vehicle climbing determination function, at least one of the four is detected in the pressure detection line. One drain wire with an edge cuts and advances the foam material toward the contacted drain wire.

(3) The charging cable with a vehicle ride determination function according to (1) or (2), wherein the pressure detection line is sandwiched between the two electric wires in the sheath. Charging cable with discrimination function.

  According to this charging cable with a vehicle riding determination function, a flat type charging cable with a vehicle riding determination function can be formed in which the parallel direction of the electric wire and the pressure detection line is the width direction.

(4) The charging cable with a vehicle climbing determination function according to (1) or (2), wherein the pressure detection line is surrounded by the four electric wires equally spaced in the circumferential direction in the sheath. A charging cable with a vehicle on-board discrimination function, characterized by comprising:

  According to this charging cable with a vehicle riding determination function, a round charging cable with a vehicle riding determination function can be formed in which four electric wires are arranged radially around the pressure detection line.

  According to the charging cable with a vehicle riding determination function according to the present invention, it can be determined whether or not the vehicle has stepped on a charging cable that cannot be seen from the appearance, and the necessity of replacement can be easily determined.

It is sectional drawing of the charging cable with a vehicle riding determination function which concerns on this invention. It is an enlarged view of the pressure detection line shown in FIG. FIG. 3 is an operation explanatory diagram of a pressure detection line shown in FIG. 2. It is a correlation figure of the foaming rate of a foam material, and the tearing pressure of a drain wire with an edge. It is sectional drawing of the charging cable with a flat type vehicle riding determination function. It is sectional drawing of the conventional charging cable for motor vehicles. It is explanatory drawing showing the charging cable for motor vehicles which the vehicle got on in the charging stand for electric vehicles.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a charging cable with a vehicle riding determination function according to the present invention.
The charging cable 11 with a vehicle riding determination function is used between a distribution board (not shown) of a charging stand for an electric vehicle and a power receiving connector on the vehicle side. The charging cable 11 with a vehicle riding determination function is provided with a pressure detection line 17 along a wire 15 in a sheath 13. The electric wire 15 includes a first power supply line 19, a second power supply line 21, a ground line 23, and a signal line 25. That is, in the sheath 13, the pressure detection wire 17 is surrounded by four electric wires 15 that are equally spaced in the circumferential direction. As a result, a round vehicle charging determination function-equipped charging cable 11 in which four electric wires 15 are arranged radially around the pressure detection line 17 is formed.

  Since the charging stand for electric vehicles and the electric vehicle to which the charging cable 11 with the vehicle riding discrimination function is connected are touched by humans, in order to protect the human body, a grounding wire 23 is provided in order to ensure the grounding of the parts touched by the humans. And is grounded to the ground via the ground terminal of the distribution board. If the charging cable 11 with a vehicle riding discrimination function is connected to a dedicated connector on the vehicle side (see the dedicated connector 517 shown in FIG. 6), the ground wire 23 is electrically connected to the body of the vehicle, and even if a leakage occurs, the human body It is protected by the ground wire 23.

  A protective device (CCID) with a built-in leakage detector is installed near the dedicated connector. A power supply relay is housed inside the protective device, and at the time of charging, a signal is sent from the vehicle side to the signal line 25 and the ground line 23 to operate the power supply relay to control the start and end of charging. In order to reliably perform this control, communication is constantly performed between the automobile and the protective device during charging.

  In the charging cable 11 with a vehicle riding determination function, an electric wire 15 and a pressure detection line 17 are provided in a sheath 13. For the sheath 13, for example, a thermoplastic resin such as nylon, urethane, polyethylene (PE), or polyvinyl chloride (PVC), which is a low friction resin, can be used. The sheath 13 may have a two-layer structure including an inner layer and an outer layer. In this case, the inner layer is formed from low-density flame-retardant polyethylene, and the outer layer is formed by covering the outer peripheral surface with a thermoplastic resin that is a low friction resin.

FIG. 2 is an enlarged view of the pressure detection line 17 shown in FIG.
The pressure detection line 17 has a contacted drain wire 29 disposed in a linear body 27 made of a foamed material 27a, and an edged portion having an edge 31 disposed in the foamed material 27a along the contacted drain wire 29. And a drain wire 33. The edge-attached drain wire 33 is arranged so that the edge 31 is opposed to the contacted drain wire 29 with the foam material 27a interposed therebetween.

  A fixed distance d is provided between each drain wire 33 with an edge and the drain wire 29 to be contacted. More specifically, the distance d can be set to 0.35 to 0.70 mm. The pressure detection line 17 is covered with the foamed material 27a around the drain wire 33 with edge and the drain wire 29 to be contacted. As the foamed material 27a, a material having a foaming rate of about 9 to 21% is suitable. As the material of the foam material 27a, a general electric wire material such as PE or PVC can be used. The pressure detection wire 17 is formed to have an outer diameter of, for example, about 4.0 to 7.0 mm, is arranged at the center of each electric wire 15, and is arranged so as to contact all the electric wires 15. It is preferable that the sheath 13 is not interposed between the electric wire 15 and the pressure detection line 17 in that the pressure can be satisfactorily transmitted to the pressure detection line 17.

  Inside the pressure detection line 17, the drain wire 33 with the edge is formed, for example, in a triangular cross section. Either a regular triangle or an isosceles triangle may be used. In the illustrated example, it is formed in an isosceles triangle. In this case, the apex portion 35 becomes a sharp edge 31 and faces the contacted drain wire 29. Such a triangular shape facilitates the formation of the edge 31 that tears the foam material 27a. In addition to this, since the opposite side of the edge 31 is the base 37, it is effective to prevent the edged drain wire 33 that has advanced in the direction approaching the contacted drain wire 29 by the edge 31 from being returned. Edges on both sides of the bottom side portion 37 are “barbed (reversed)”. By preventing this reverse return, the contact state between the drain wire 33 with edge once contacted and the drain wire 29 to be contacted can be satisfactorily maintained. That is, it is possible to reliably hold a history of applying a constant pressure.

  In addition, at least one edged drain wire 33 is arranged between the electric wire 15 and the contacted drain wire 29 inside the pressure detection line 17. In the illustrated example, all the drain wires 33 with edges are arranged between the electric wire 15 and the contacted drain wire 29. As a result, the pressure difference between the pressure applied to the electric wire 15 and the pressure when the edged drain wire 33 comes into contact with the contacted drain wire 29 can be reduced, and the vehicle riding determination result and the actual damage to the electric wire 15 can be reduced. It is made to be equal.

Next, the operation of the charging cable 11 with the vehicle riding determination function having the above configuration will be described.
FIG. 3 is an explanatory diagram of the operation of the pressure detection line 17 shown in FIG.
Since the foam material 27a used for the pressure detection wire 17 is higher in flexibility than the insulator material of the electric wire 15, when pressure is applied to the charging cable 11 with the vehicle riding discrimination function, before the electric wire 15 is deformed, The foam material 27a of the pressure detection line 17 is deformed. As shown in FIG. 3, the distance d between the drain wire 33 with an edge and the drain wire 29 to be contacted is reduced by the deformation of the foam material 27a. The edge 31 of the edge-attached drain wire 33 has a sharp apex portion 35 at the tip, so that the foamed material 27a is cut and the drain wire 33 with the edge contacts the drain wire 29 to be contacted.

  The pressure detection line 17 is configured such that the contacted drain wire 29 is surrounded by four edge-attached drain wires 33 that are equally spaced in the circumferential direction. When pressure radially inward from the position is applied, at least one of the four edge-attached drain wires 33 advances and cuts the foam material 27a toward the contacted drain wire 29 in the pressure detection line 17. It will be. Accordingly, it is possible to determine that the vehicle has been boarded by detecting contact between the two lines.

FIG. 4 is a correlation diagram between the foaming rate of the foamed material 27a and the tearing pressure of the drain wire 33 with the edge.
Here, the relationship between the pressure at which the drain wire 33 with the edge cuts the foam material 27a and the foaming rate of the foam material 27a is as shown in FIG. 4 and Table 1 below. That is, when the vehicle weight (t) is 8 t, the pressure applied to the charging cable 11 with the vehicle riding determination function is 0.74 kg / mm ² , and the foaming ratio at that time is 21%. Further, when the vehicle weight is 10 t, the pressure applied to the charging cable 11 with the vehicle riding determination function is 0.83 kg / mm ² , and the foaming ratio at that time is 9%. That is, the foaming rate decreases as the vehicle weight increases. The relational expression between the foaming ratio and the pressure for tearing the foamed material 27a is expressed as y = 19081e ^-6.1228x .

  Further, as shown in Table 2 below, the relationship between the foaming rate of the foam material 27a and the speed at which the edged drain wire 33 tears the foam material 27a is 2.0 mm / s when the foaming rate is 21%. When the rate is 9%, it is 1.0 mm / s. That is, as the foaming rate decreases, the tearing speed decreases.

  From the relationship shown in Table 2, the time for a vehicle having a vehicle weight to ride on the charging cable 11 with the vehicle climbing determination function is about 1 second, and therefore the distance between the drain wire 33 with the edge and the drain wire 29 to be contacted must be 1 mm or less. It will be.

  Furthermore, in the charging cable 11 with the vehicle riding determination function, the edged drain wires 33 are arranged in four directions, so that it is possible to detect whether the vehicle rides from any direction of the contacted drain wire 29. For example, when the vehicle weight at which the sheath 13 and the insulator are crushed when the vehicle is stepped on is set to about 9 t, the foaming rate of the foamed material 27a is 15% from the relationship of FIG. The separation from the contacted drain wire 29 is 0.7 mm or less.

FIG. 5 is a cross-sectional view of a flat type vehicle charging determination function-equipped charging cable 11A.
In the above-described embodiment, the circular charging cable 11 with the vehicle climbing discrimination function in which the four electric wires 15 are radially arranged around the pressure detection line 17 has been described as an example, but the vehicle riding according to the present invention is described. The charging cable with a discrimination function may be the charging cable 11A with a vehicle riding discrimination function shown in FIG. 5 in which the pressure detection line 17 is sandwiched between the two electric wires 15 in the sheath 13. According to such a configuration, it is possible to form a flat type vehicle riding determination function-equipped charging cable 11 </ b> A in which the parallel direction of the electric wires 15 and the pressure detection lines 17 is the width direction.

  Therefore, according to the charging cables 11 and 11A with the vehicle riding determination function according to the present embodiment, it is possible to determine whether or not the vehicle has stepped on a charging cable that cannot be seen from the appearance, and it is easy to determine whether or not replacement is necessary. Can be.

11, 11A Charging cable with vehicle climbing discrimination function 13 Sheath 15 Electric wire 17 Pressure detection line 27 Linear body 27a Foam 29 Touched drain wire 31 Edge 33 Edged drain wire

Claims (4)

In the sheath, a charging cable with a vehicle climbing discrimination function provided with a pressure detection line along the electric wire,
The pressure detection line includes a contacted drain wire disposed in a linear body made of a foam material, an edged drain wire disposed along the contacted drain wire in the foam material, and an edge. Comprising
The charging cable with a vehicle riding discrimination function, wherein the edge-attached drain wire is disposed so that the edge is opposed to the contacted drain wire with the foam interposed therebetween. A charging cable with a vehicle riding discrimination function according to claim 1,
The charging cable with a vehicle ride-on discrimination function, wherein the pressure detection line is formed by surrounding the contacted drain wire with four drain wires with edges equally spaced in a circumferential direction. A charging cable with a vehicle riding discrimination function according to claim 1 or 2,
A charging cable with a vehicle riding discrimination function, wherein the pressure detection line is sandwiched between the two electric wires in the sheath. A charging cable with a vehicle riding discrimination function according to claim 1 or 2,
A charging cable with a vehicle climbing discrimination function, wherein the pressure detection line is surrounded by four electric wires that are equally spaced in the circumferential direction in the sheath.

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