JP6155171B2 - Power supply apparatus and power supply method - Google Patents

Description

  The present invention relates to a power feeding device and a power feeding method.

  An electric vehicle that travels by receiving power supply from an external power supply device has a current collector (pantograph) for receiving power supply from the power supply device. The electric vehicle is provided with three current collectors of a positive electrode, a negative electrode, and a ground electrode, and each of them contacts the power supply shoe of the positive electrode, the negative electrode, and the ground electrode of the power supply device, thereby supplying power from the power supply device to the electric vehicle. Done.

  At this time, when the current collector comes into contact with a power feeding shoe having different poles, an overcurrent or a ground fault occurs, and there is a possibility that a device loaded on the electric vehicle breaks down. Here, in Patent Document 1, in order to detect a grounding abnormality, a grounding abnormality is detected using two of a power supply side circuit and a grounding detection circuit, and when the grounding abnormality is detected, the circuit breaker is opened. Techniques for protecting equipment are disclosed.

Japanese Patent Laid-Open No. 10-98801

However, since the method disclosed in Patent Document 1 is provided with an apparatus for detecting an abnormality in grounding in an electric vehicle, the apparatus is required by the number of electric vehicles, the weight of the electric vehicle is increased, and the cost of the electric vehicle is increased. There is a problem that becomes high.
An object of the present invention is to provide a power supply apparatus and a power supply method that solve the above-described problems.

  The first aspect has a plurality of contacts arranged in a line at intervals, and these contacts form a pair in two adjacent pairs, and a plurality of sets corresponding to each of a plurality of electrodes having different potentials. A power supply device that configures a pair of contact points and supplies electricity to the vehicle through these contact pairs, and determines whether or not a contact of one contact pair is connected to a contact of another contact pair. When determining that the contact of one contact pair is not connected to the contact of the other contact pair, the determination unit connects the one contact pair and the electrode corresponding to the contact pair. A power supply apparatus comprising: a determination unit for determining.

  Further, a second aspect is the first aspect, in which the determination unit further determines whether or not the contact points forming a pair are connected to each other in all the contact pairs. When it is determined that the contacts of the contact pair are not connected to the contacts of the other contact pair, and it is determined that all the contact pairs are connected to each other, the pair of contacts It is a power supply apparatus that determines to connect the contact pair and the electrode corresponding to the contact pair.

  In addition, the third aspect is the power supply for supplying electricity to the vehicle in which the contact pair is connected to the electrode corresponding to the contact pair in the first or second aspect. The contact state is a contact that is connected to a confirmation target contact that is one of the plurality of contacts arranged in a row and a first electrode selected from the plurality of electrodes, and is adjacent to the confirmation target contact. A second adjacent contact that is connected to a first adjacent contact and a second electrode that is different from the first electrode and that is different from the first adjacent contact adjacent to the contact to be confirmed. A switch capable of switching between a first confirmation connection state for confirming the presence or absence of a short circuit, wherein a contact is connected to the first electrode, or the second adjacent contact is insulated from all the electrodes. Circuit and said first confirmation connection A detector for detecting a current flowing between the first electrode and the contact to be confirmed or between the second electrode and the first adjacent contact, and in the first confirmation connection state, A resistor provided between the first electrode and the contact to be confirmed or between the second electrode and the first adjacent contact, and the determination unit is configured for the first confirmation. Based on the detection result of the detector in the connection state, it is determined whether or not the confirmation target contact is connected to a contact of a contact pair different from the contact pair constituting the confirmation target contact, the determination unit, For all contact pairs adjacent to each other in different contact pairs, when it is determined that the contact to be confirmed is not connected to a contact of a contact pair different from the contact pair constituting the contact to be confirmed, the switch circuit is Power supply connection A power supply device and determining to switch to.

  Further, a fourth aspect is that in the third aspect, in addition to the power supply connection state and the first confirmation connection state, the switch circuit connects all the contacts with each other for each of the contact pairs. Are connected in series, and can be switched to a second confirmation connection state for confirming the presence or absence of connection, and the detector is connected to the first confirmation connection state in the first confirmation connection state. A current flowing between an electrode and the contact to be confirmed or between the second electrode and the first adjacent contact, and the contact for each of the contact pairs in the second confirmation connection state When they are connected to each other, a current in a location in series with all the contacts is detected, and the resistor is connected between the first electrode and the contact to be confirmed or in the second state in the first confirmation connection state. With electrodes When the contacts are connected to each other for each of the contact pairs in the second connection state for confirmation, provided between the first adjacent contacts and the contacts in series with each other, the determination The unit determines whether or not the contacts are connected to each of the contact pairs based on the detection result of the detector in the second confirmation connection state, and the determination unit In all the contact pairs adjacent to each other, it is determined that the contact to be confirmed is not connected to a contact of a contact pair different from the contact pair constituting the contact to be confirmed, and the contacts are contacted for each of the contact pairs. Is determined to be connected, the switch circuit is determined to be switched to the power supply connection state.

  A fifth aspect is the third or fourth aspect, wherein the first circuit including the resistor and the resistor are provided between at least one of the electrodes and the contact pair corresponding to the electrode. A second circuit not provided, and when the switch circuit switches to the first confirmation connection state, the first circuit connects the electrode and the contact to be confirmed or the first adjacent contact. When the power supply is connected and switched to the power supply connection state, the electrode and the contact pair corresponding to the electrode are connected via the second circuit.

  According to a sixth aspect, in any one of the third to fifth aspects, the confirmation target contact and the first adjacent contact form the contact pair, and the determination unit includes the first confirmation. When the detector detects a current in the connection state, the power supply is characterized in that it is determined that the confirmation target contact is not connected to a contact of a contact pair different from the contact pair constituting the confirmation target contact Device.

  According to a seventh aspect, in any one of the third to fifth aspects, the confirmation target contact and the second adjacent contact form the contact pair, and the determination unit includes the first confirmation. When the detector does not detect a current in the connection state for use, it is determined that the check target contact is not connected to a contact of a contact pair different from the contact pair constituting the check target contact Device.

  Further, the eighth aspect has a plurality of contacts arranged in a line at intervals, and these contacts form a pair of two adjacent ones, corresponding to each of a plurality of electrodes having different potentials. A power supply method using a power supply device that configures a plurality of contact pairs and supplies electricity to the vehicle through these contact pairs, wherein a contact of one contact pair is connected to a contact of another contact pair. A first step of determining whether or not the contact of one contact pair corresponds to the contact pair and the contact pair when it is determined that the contact of the one contact pair is not connected to the contact of the other contact pair And a second step of deciding to connect the electrode.

  Further, the ninth aspect is the third step in the eighth aspect, in which, prior to the second step, in all the contact pairs, it is determined whether or not the paired contacts are connected to each other. In the second step, it is determined that the contact of one contact pair is not connected to the contact of the other contact pair, and all the contact pairs are paired with each other. When it is determined that the contact point is connected, it is determined to connect one contact point pair and the electrode corresponding to the contact point pair.

  According to a tenth aspect, in the eighth or ninth aspect, in the first step, the power supply device is a confirmation target contact that is one of the plurality of contacts arranged in a row and the plurality of the plurality of contacts. The first electrode selected from the electrodes is connected, and the first adjacent contact that is the contact adjacent to the contact to be confirmed and the second electrode that is different from the first electrode are connected. And the second adjacent contact, which is different from the first adjacent contact adjacent to the contact to be confirmed, and the first electrode are connected, or the second adjacent contact is connected to all the electrodes. Switch to a first connection state for confirmation to confirm the presence or absence of a short circuit that is insulated, and based on the detection result of the detector in the first connection state for confirmation, the confirmation object contact is the confirmation object Different from the contact pairs that make up a contact In the second step, the contact to be confirmed constitutes a contact that constitutes the contact to be confirmed for all contact pairs adjacent to each other in different contact pairs. When it is determined that the contact is not connected to a contact of a contact pair different from the pair, the power supply device supplies electricity to the vehicle in which the contact pair is connected to an electrode corresponding to the contact pair. It is the power feeding method characterized by switching to the power feeding connection state to be performed.

  According to the present invention, the power supply device determines whether or not the contacts (power supply shoes) connected to different electrodes (power supply and ground electrode) are connected, and based on the determination result, the electrode and the contact are determined. Determine whether to connect. Thereby, it is possible to detect a contact abnormality between the contact point and the current collector without the electric vehicle having a grounding abnormality detection device.

It is the schematic which shows the structure of the electric power feeder which concerns on the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the electric power feeder which concerns on the 1st Embodiment of this invention. In the 1st Embodiment of this invention, it is the schematic which shows the electric power feeding circuit when determining whether the electric power feeding shoe corresponding to a positive electrode and the electric power feeding shoe corresponding to a grounding electrode are short-circuited. In the 1st Embodiment of this invention, it is the schematic which shows the electric power feeding circuit when determining whether the electric power feeding shoe corresponding to a negative electrode and the electric power feeding shoe corresponding to a grounding electrode are short-circuited. In the 1st Embodiment of this invention, it is the schematic which shows the electric power feeding circuit when determining whether all the pair of electric power feeding shoes corresponding to the same electrode are connected. It is the schematic which shows the electric power feeding circuit at the time of the electric power feeding in the 1st Embodiment of this invention. It is the schematic which shows the structure of the electric power feeder which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the electric power feeder which concerns on the 2nd Embodiment of this invention. In the 2nd Embodiment of this invention, it is the schematic which shows the electric power feeding circuit when determining whether the electric power feeding shoe corresponding to a positive electrode and the electric power feeding shoe corresponding to a negative electrode are short-circuited. In the 2nd Embodiment of this invention, it is the schematic which shows the electric power feeding circuit when determining whether the electric power feeding shoe corresponding to a positive electrode and the electric power feeding shoe corresponding to a grounding electrode are short-circuited. In the 2nd Embodiment of this invention, it is the schematic which shows the electric power feeding circuit when determining whether all the one pair of electric power feeding shoes corresponding to the same electrode are connected. It is the schematic which shows the electric power feeding circuit at the time of the electric power feeding in the 2nd Embodiment of this invention. It is the schematic which shows the structure of the electric power feeder which concerns on the 3rd Embodiment of this invention. It is a flowchart which shows operation | movement of the electric power feeder which concerns on the 3rd Embodiment of this invention. In the 3rd Embodiment of this invention, it is the schematic which shows the electric power feeding circuit when determining whether the electric power feeding shoes corresponding to a negative electrode are connected. In the 3rd Embodiment of this invention, it is the schematic which shows the electric power feeding circuit when determining whether the electric power feeding shoes corresponding to a ground pole are connected. In the 3rd Embodiment of this invention, it is the schematic which shows the electric power feeding circuit when determining whether the electric power feeding shoes corresponding to a positive electrode are connected. It is the schematic which shows the electric power feeding circuit at the time of the electric power feeding in the 3rd Embodiment of this invention.

<< First Embodiment >>
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram illustrating a configuration of a power supply apparatus 100 according to the first embodiment of the present invention.
The power supply apparatus 100 includes a power supply circuit 110, a determination unit 120, and a switch control unit 130 (determination unit).
The power supply circuit 110 includes a positive electrode (positive electrode) and a negative electrode (negative electrode), a ground electrode (ground electrode), and a pair of power supply shoes 114A to 114F (hereinafter referred to as power supply shoes) corresponding to these electrodes. 114A to 114F is a circuit that connects the power supply shoe 114) (contact point). Specifically, the power supply shoes 114A and 114B correspond to the positive electrode, the power supply shoes 114C and 114D correspond to the ground electrode, and the power supply shoes 114E and 114F correspond to the negative electrode. The power feeding shoes 114A to 114F are arranged in parallel in the order of 114A, 114B, 114C, 114D, 114E, and 114F at intervals.

  Here, the absolute value of the positive electrode potential is equal to the absolute value of the negative electrode potential, and the positive electrode and the negative electrode are connected via a resistor 115B and a resistor 115C having the same resistance value. A point between the resistor 115B and the resistor 115C is connected to the ground electrode. For this reason, the potential at the point between the resistor 115B and the resistor 115C is 0 volts, and between the point between the resistor 115B and the resistor 115C and the ground electrode unless a ground fault occurs. Current does not flow.

  The positive electrode of the power feeding circuit 110 is connected to the power feeding shoes 114B and 114A via a main circuit 111A and an auxiliary circuit 112A provided in parallel, respectively. Here, the main circuit 111A is a circuit in which the switch 113B, the current detector 116B, and the switch 113E are connected in series. The auxiliary circuit 112A is a circuit in which a switch 113A, a resistor 115A, and a current detector 116A are connected in series. That is, by opening the switch 113A and closing the switches 113B and 113E, the positive electrode and the power supply shoe 114B can be connected via the main circuit 111A. On the other hand, by closing the switch 113A and opening the switches 113B and 113E, the positive electrode and the feeding shoe 114A can be connected via the auxiliary circuit 112A. The power feeding shoes 114A and 114B are connected via a switch 113L. In the present embodiment, the current detectors 116A and 116B are examples of detectors. In this embodiment, a case where a current detector is used as a detector will be described. However, in another embodiment, for example, a voltmeter or a wattmeter may be used instead of the current detector.

  Further, the ground electrode of the power feeding circuit 110 is connected to the power feeding shoe 114D through the switch 113F. In addition, the power feeding shoes 114C and 114D are connected via a switch 113M.

  Further, the negative electrode of the power feeding circuit 110 is connected to the power feeding shoes 114F and 114E via a main circuit 111B and an auxiliary circuit 112B provided in parallel, respectively. Here, the main circuit 111B is a circuit in which a switch 113C and a switch 113G are connected in series. The auxiliary circuit 112B is a circuit in which a switch 113D and a resistor 115D are connected in series. That is, by opening the switch 113D and closing the switches 113C and 113G, the positive electrode and the power supply shoe 114F can be connected via the main circuit 111B. On the other hand, by closing the switch 113D and opening the switches 113C and 113G, the positive electrode and the feeding shoe 114E can be connected via the auxiliary circuit 112B. The power feeding shoes 114E and 114F are connected via a switch 113N.

The power supply shoe 114A is connected to the power supply shoe 114C through the switch 113H.
The power supply shoe 114B is connected to the power supply shoe 114D via the switch 113I.
The power supply shoe 114C is connected to the power supply shoe 114F via the switch 113J.
In addition, the power supply shoe 114D is connected to the power supply shoe 114E via the switch 113K.

  In this embodiment, in order to protect the circuit from a large current, the main circuit 111A and the main circuit 111B are provided with circuit protection (not shown), and the auxiliary circuit 112A and the auxiliary circuit 112B have fuses (not shown). ) Is provided.

The determination unit 120 determines whether the power supply shoe 114 is connected to another power supply shoe 114 corresponding to a different electrode. Further, the determination unit 120 determines whether or not the pair of power supply shoes 114 corresponding to the same electrode are all connected.
The switch control unit 130 controls opening and closing of the switches 113A to 113N (hereinafter, the switches 113A to 113N are collectively referred to as the switch 113) (switch circuit). Further, when the switch control unit 130 determines that the power supply shoe 114 is not connected to other contacts corresponding to different electrodes and determines that all of the pair of power supply shoes 114 are connected, the electrode And a pair of power supply shoes 114 corresponding to the electrodes are determined to be connected.

Next, the operation of the power supply apparatus 100 according to this embodiment will be described.
FIG. 2 is a flowchart showing the operation of the power supply apparatus 100 according to the first embodiment of the present invention.
When the contact portion of the electric vehicle comes into contact with the power supply shoe 114 of the power supply apparatus 100, the determination unit 120 first determines whether the power supply shoe 114 corresponding to the positive electrode and the power supply shoe 114 corresponding to the ground electrode are short-circuited by the contact portion of the electric vehicle. It is determined whether or not (step S1). That is, it is determined whether the power supply shoe 114B is connected to the power supply shoe 114C.

Specifically, first, the switch control unit 130 closes the switches 113A, 113C, 113G, 113J, 113L, 113M, and 113N, and opens the switches 113B, 113D, 113E, 113F, 113H, 113I, and 113K. Thus, the power feeding circuit 110 connects the power feeding shoe 114A (second adjacent contact) and the power feeding shoe 114B (contact to be confirmed) and the positive electrode (first electrode) via the auxiliary circuit 112A, and connects the main circuit 111B. Thus, the power supply shoe 114C (first adjacent contact) is connected to the negative electrode (second electrode) (first connection state for confirmation).
Next, the determination unit 120 determines whether or not the current detector 116A has detected a current, and determines that the power supply shoe 114B and the power supply shoe 114C are short-circuited when the current is detected.

Here, the reason for determining that the feeding shoe 114B and the feeding shoe 114C are short-circuited when the current detector 116A detects a current will be described.
FIG. 3 is a schematic diagram showing the power supply circuit 110 when determining whether or not the power supply shoe 114 corresponding to the positive electrode and the power supply shoe 114 corresponding to the ground electrode are short-circuited in the first embodiment of the present invention. is there. In FIG. 3, circuits that are insulated because the switch 113 is open are omitted.
As shown in FIG. 3, the positive electrode and the power supply shoes 114A and 114B are connected via an auxiliary circuit 112A. The negative electrode and the power feeding shoes 114C to 114F are connected via the main circuit 111B.

Here, when the contact portion corresponding to the positive electrode of the electric vehicle and the power supply shoes 114A and 114B are in contact with each other and the contact portion corresponding to the ground electrode of the electric vehicle and the power supply shoes 114C and 114D are in contact with each other, a current is generated between the positive electrode and the negative electrode. Does not flow.
On the other hand, when the same contact portion and the power feeding shoes 114B, 114C come into contact with each other due to a shift in the stopping position of the electric vehicle, a shift in the position of the contact portion, a shift in the position of the vehicle-side contactor, the auxiliary circuit 112A, the switch 113L, A current flows between the positive electrode and the negative electrode via the power supply shoe 114B, the contact portion, the power supply shoe 114C, the switch 113J, and the main circuit 111B.

  Therefore, the current detector 116A detects a current when the power supply shoe 114 corresponding to the positive electrode and the power supply shoe 114 corresponding to the ground electrode are short-circuited, and the power supply corresponding to the power supply shoe 114 corresponding to the positive electrode and the ground electrode is supplied. The current is not detected when the shoe 114 is not short-circuited. In addition, since the resistor 115A is provided in the auxiliary circuit 112A, it is possible to prevent a large current from being generated when the power supply shoe 114 corresponding to the positive electrode and the power supply shoe 114 corresponding to the ground electrode are short-circuited.

  When determining unit 120 determines that power supply shoe 114 corresponding to the positive electrode and power supply shoe 114 corresponding to the ground electrode are not short-circuited (step S <b> 1: NO), power supply shoe 114 corresponding to the negative electrode by the contact part of the electric vehicle. It is determined whether or not the power supply shoe 114 corresponding to the ground electrode is short-circuited (step S2). That is, it is determined whether or not the power supply shoe 114E is connected to the power supply shoe 114D.

Specifically, the switch control unit 130 first closes the switches 113B, 113D, 113E, 113I, 113L, 113M, and 113N and opens the switches 113A, 113C, 113F, 113G, 113H, 113J, and 113K. Accordingly, the power feeding circuit 110 connects the power feeding shoe 114C (second adjacent contact) and the power feeding shoe 114D (contact to be confirmed) and the positive electrode (first electrode) via the main circuit 111A, and the auxiliary circuit 112B is connected. Thus, the power supply shoe 114E (first adjacent contact) is connected to the negative electrode (second electrode) (first connection state for confirmation).
Next, the determination unit 120 determines whether or not the current detector 116B has detected a current, and determines that the power supply shoe 114D and the power supply shoe 114E are short-circuited when the current is detected.

Here, the reason for determining that the feeding shoe 114D and the feeding shoe 114E are short-circuited when the current detector 116B detects a current will be described.
FIG. 4 is a schematic diagram showing the power supply circuit 110 when determining whether or not the power supply shoe 114 corresponding to the negative electrode and the power supply shoe 114 corresponding to the ground electrode are short-circuited in the first embodiment of the present invention. is there. In FIG. 4, circuits that are insulated because the switch 113 is open are omitted.
As shown in FIG. 4, the positive electrode and the power supply shoes 114A to 114D are connected via the main circuit 111A. Further, the negative electrode and the power feeding shoes 114E and 114F are connected via an auxiliary circuit 112B.

Here, when the contact portion corresponding to the negative electrode of the electric vehicle and the power supply shoes 114E and 114F are in contact with each other, and the contact portion corresponding to the ground electrode of the electric vehicle and the power supply shoes 114C and 114D are in contact with each other, a current is generated between the positive electrode and the negative electrode. Does not flow.
On the other hand, when the same contact portion and the power feeding shoes 114D and 114E come into contact with each other due to a shift in the stopping position of the electric vehicle, a shift in the position of the contact portion, a shift in the position of the vehicle-side contactor, the main circuit 111A, the switch 113I, A current flows between the positive electrode and the negative electrode via the power supply shoe 114D, the contact portion, the power supply shoe 114E, the switch 113N, and the auxiliary circuit 112B.

  Therefore, the current detector 116B detects a current when the power supply shoe 114 corresponding to the negative electrode and the power supply shoe 114 corresponding to the ground electrode are short-circuited, and the power supply corresponding to the power supply shoe 114 corresponding to the negative electrode and the ground electrode. The current is not detected when the shoe 114 is not short-circuited. In addition, since the resistor 115D is provided in the auxiliary circuit 112B, it is possible to prevent a large current from being generated when the power supply shoe 114 corresponding to the negative electrode and the power supply shoe 114 corresponding to the ground electrode are short-circuited.

  When the determination unit 120 determines that the power supply shoe 114 corresponding to the negative electrode and the power supply shoe 114 corresponding to the ground electrode are not short-circuited (step S2: NO), the pair of power supply shoes 114 corresponding to the same electrode are connected to each other. It is determined whether or not all are connected (step S3). That is, the determination unit 120 determines whether the power supply shoe 114A and the power supply shoe 114B, the power supply shoe 114C and the power supply shoe 114D, and the power supply shoe 114E and the power supply shoe 114F are connected.

Specifically, first, the switch control unit 130 closes the switches 113A, 113D, 113I, and 113J, and opens the switches 113B, 113C, 113E, 113F, 113G, 113H, 113K, 113L, 113M, and 113N. Thus, in the power feeding circuit 110, when the power feeding shoe 114A and the power feeding shoe 114B, the power feeding shoe 114C and the power feeding shoe 114D, and the power feeding shoe 114E and the power feeding shoe 114F are respectively connected, all the power feeding shoes 114 are connected in series. (Second confirmation connection state).
Next, the determination unit 120 determines whether or not the current detector 116 </ b> A has detected a current. When the current is detected, the pair of feeding shoes 114 corresponding to the same electrode are all connected. judge.

Here, the reason why it is determined that the pair of power supply shoes 114 corresponding to the same electrode are all connected when the current detector 116A detects a current will be described.
FIG. 5 is a schematic diagram showing the power feeding circuit 110 when determining whether or not all the pair of power feeding shoes 114 corresponding to the same electrode are connected to each other in the first embodiment of the present invention. In FIG. 5, circuits that are insulated because the switch 113 is open are omitted.
As shown in FIG. 5, the positive electrode and the feeding shoe 114A are connected via an auxiliary circuit 112A. The power supply shoe 114B is connected to the power supply shoe 114D via the switch 113I. The power supply shoe 114C is connected to the power supply shoe 114F via the switch 113J. The feeding shoe 114E and the negative electrode are connected via the auxiliary circuit 112B.

  At this time, when the contact portion of the electric vehicle and the feeding shoes 114A and 114B are in contact, the contact portion of the electric vehicle and the feeding shoes 114C and 114D are in contact, and the contact portion of the electric vehicle and the feeding shoes 114E and 114F are in contact, Current flows between the positive and negative electrodes. In this way, the current detector 116A detects current when a pair of power supply shoes 114 corresponding to the same electrode are all connected, and the pair of power supply shoes 114 corresponding to the same electrode is one. If it is not connected at any place, no current is detected.

  Note that current also flows between the positive electrode and the negative electrode when the contact portion of the electric vehicle is in contact with the power supply shoes 114A and 114B and the contact portion of the electric vehicle is in contact with the power supply shoes 114D and 114E. However, since the determination in step S3 is performed when it is determined in step S2 that the power supply shoes 114D and 114E are not connected, no erroneous determination occurs. In addition, since the resistor 115A is provided in the auxiliary circuit 112A and the resistor 115D is provided in the auxiliary circuit 112B, a large current is generated when a pair of feeding shoes 114 corresponding to the same electrode are all connected. It can be prevented from occurring.

  When determining unit 120 determines that a pair of power feeding shoes 114 corresponding to the same electrode are all connected (step S3: YES), switch control unit 130 starts supplying electricity to the electric vehicle. Is determined (step S4). The switch control unit 130 connects the pair of power supply shoes 114 corresponding to the positive electrode, the negative electrode, and the ground electrode. Specifically, the switch control unit 130 closes the switches 113B, 113C, 113E, 113F, 113G, 113L, 113M, and 113N and opens the switches 113A, 113D, 113H, 113I, 113J, and 113K.

FIG. 6 is a schematic diagram showing the power feeding circuit 110 during power feeding in the first embodiment of the present invention. In FIG. 6, circuits that are insulated because the switch 113 is open are omitted.
As shown in FIG. 6, the power supply circuit 110 connects the power supply shoe 114A and the power supply shoe 114B, the power supply shoe 114C and the power supply shoe 114D, and the power supply shoe 114E and the power supply shoe 114F. The shoes 114A and 114B are connected to the positive electrode, the power supply shoes 114C and 114D are connected to the ground electrode, and the power supply shoes 114E and 114F are connected to the negative electrode (power supply connection state).

  Thereafter, the electric vehicle connects the contact portion corresponding to the ground electrode and the vehicle body (body earth) of the electric vehicle, connects the contact portion corresponding to the positive electrode and one end of the secondary battery of the electric vehicle, and connects the negative electrode The secondary battery of the electric vehicle can be charged by connecting the contact portion corresponding to 1 and the other end of the secondary battery.

  When the determination unit 120 determines that the power supply shoe 114 corresponding to the positive electrode and the power supply shoe 114 corresponding to the ground electrode are short-circuited (step S1: YES), the power supply shoe 114 corresponding to the negative electrode is connected to the ground electrode. When it is determined that the corresponding power supply shoes 114 are short-circuited (step S2: YES), or when it is determined that a pair of power supply shoes 114 corresponding to the same electrode are not connected at any one place (step) S3: NO), the power supply apparatus 100 does not supply power. In this case, the power supply apparatus 100 issues an alarm to the electric vehicle, corrects the deviation of the stopping position of the electric vehicle, the deviation of the position of the contact portion, the deviation of the position of the vehicle-side contactor, etc., and then performs the process from step S1 again. Need to do.

  Thus, according to the present embodiment, the power supply apparatus 100 determines whether or not the power supply shoes 114 connected to different electrodes are connected to each other, and connects the electrode and the contact based on the determination result. It is determined whether or not. Thereby, it is possible to detect a contact abnormality between the contact point and the current collector without the electric vehicle having a grounding abnormality detection device.

<< Second Embodiment >>
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 7 is a schematic diagram illustrating a configuration of a power feeding device 200 according to the second embodiment of the present invention.
The power supply apparatus 200 according to the second embodiment is different from the first embodiment in the configuration of the power supply circuit 210.
In the power supply circuit 210 according to the second embodiment, the power supply shoes 214A and 214B correspond to the ground electrode, the power supply shoes 214C and 214D correspond to the positive electrode, and the power supply shoes 214E and 214F correspond to the negative electrode. Yes. The power feeding shoes 214A to 214F are arranged in parallel in the order of 214A, 214B, 214C, 214D, 214E, and 214F at intervals.

Here, the absolute value of the positive electrode potential is equal to the absolute value of the negative electrode potential, and the positive electrode and the negative electrode are connected via a resistor 215B and a resistor 215C having the same resistance value. A point between the resistor 215B and the resistor 215C is connected to the ground electrode via the switch 213C. For this reason, the potential at the point between the resistor 215B and the resistor 215C is 0 volt, and there is no current between the point between the resistor 215B and the resistor 25C and the ground electrode unless a ground fault occurs. Does not flow.
The grounding pole of the power feeding circuit 210 is connected to the power feeding shoe 214B. Further, the power feeding shoes 214A and 214B are connected via a switch 213H.

  Further, the positive electrode of the power feeding circuit 210 is connected to power feeding shoes 214D and 214C via a main circuit 211 and an auxiliary circuit 212 provided in parallel, respectively. Here, the main circuit 211 is a circuit in which a switch 213B, a current detector 216B, and a switch 213D are connected in series. The auxiliary circuit 212 is a circuit in which a switch 213A, a resistor 215A, and a current detector 216A are connected in series. That is, by opening the switch 213A and closing the switches 213B and 213D, the positive electrode and the power supply shoe 214D can be connected via the main circuit 211. On the other hand, by closing the switch 213A and opening the switches 213B and 213D, the positive electrode and the power supply shoe 214C can be connected via the auxiliary circuit 212. The power feeding shoes 214C and 214D are connected via a switch 213G.

The negative electrode of the power feeding circuit 210 is connected to the power feeding shoe 214F via the switch 213E. Further, the power feeding shoes 214E and 214F are connected via a switch 213J.
In addition, the power supply shoe 214A is connected to the power supply shoe 214D via the switch 213F.
The power supply shoe 214B is connected to the power supply shoe 214E via the switch 213G.

Next, the operation of the power supply apparatus 200 according to this embodiment will be described.
FIG. 8 is a flowchart showing the operation of the power supply apparatus 200 according to the second embodiment of the present invention.
When the contact portion of the electric vehicle comes into contact with the power supply shoe 214 of the power supply device 200, the determination unit 220 first determines whether the power supply shoe 214 corresponding to the positive electrode and the power supply shoe 214 corresponding to the negative electrode are short-circuited by the contact portion of the electric vehicle. Is determined (step S11). That is, it is determined whether or not the power supply shoe 214D is connected to the power supply shoe 214E.

Specifically, first, the switch control unit 230 closes the switches 213A, 213E, 213I, and 213J and opens the switches 213B, 213C, 213D, 213F, and 213G. As a result, the power feeding circuit 210 connects the power feeding shoe 214C (second adjacent contact) and the power feeding shoe 214D (contact to be confirmed) and the positive electrode (first electrode) via the auxiliary circuit 212, and via the switch 213E. Thus, the power supply shoe 214E (first adjacent contact) is connected to the negative electrode (second electrode) (first confirmation connection state). Note that since the power supply shoe 214A and the power supply shoe 214B are not connected to any of the positive electrode, the negative electrode, and the ground electrode, the switch 213H may be closed or opened.
Next, the determination unit 220 determines whether or not the current detector 216A has detected a current, and determines that the power supply shoe 214D and the power supply shoe 214E are short-circuited when the current is detected.

Here, the reason for determining that the feeding shoe 214D and the feeding shoe 214E are short-circuited when the current detector 216A detects a current will be described.
FIG. 9 is a schematic diagram illustrating a power supply circuit 210 when determining whether or not the power supply shoe 214 corresponding to the positive electrode and the power supply shoe 214 corresponding to the negative electrode are short-circuited in the second embodiment of the present invention. . In FIG. 9, circuits that are insulated because the switch 213 is open are omitted.
As shown in FIG. 9, the positive electrode and the power feeding shoes 214 </ b> C and 214 </ b> D are connected via an auxiliary circuit 212. Further, the negative electrode and the power feeding shoes 214E and 214F are connected via a switch 213E.

Here, when the contact portion corresponding to the positive electrode of the electric vehicle and the power supply shoes 214C and 214D are in contact with each other, and the contact portion corresponding to the negative electrode of the electric vehicle and the power supply shoes 214E and 214F are in contact, the current between the positive electrode and the negative electrode is Not flowing.
On the other hand, when the same contact portion and the power feeding shoes 214D and 214E come into contact with each other due to a shift in the stopping position of the electric vehicle, a shift in the position of the contact portion, a shift in the position of the vehicle-side contactor, the auxiliary circuit 212, the switch 213I, A current flows between the positive electrode and the negative electrode through the power supply shoe 214D, the contact portion, the power supply shoe 214E, the switch 213J, and the switch 213E.

  Therefore, the current detector 216A detects a current when the power supply shoe 214 corresponding to the positive electrode and the power supply shoe 214 corresponding to the negative electrode are short-circuited, and the power supply shoe 214 corresponding to the positive electrode and the power supply shoe 214 corresponding to the negative electrode. Does not detect current when is not short-circuited. In addition, since the resistor 215A is provided in the auxiliary circuit 212, it is possible to prevent a large current from being generated when the power supply shoe 214 corresponding to the positive electrode and the power supply shoe 214 corresponding to the negative electrode are short-circuited.

  When determining unit 220 determines that power supply shoe 214 corresponding to the positive electrode and power supply shoe 214 corresponding to the negative electrode are not short-circuited (step S11: NO), power supply shoe 214 corresponding to the positive electrode is contacted by the contact portion of the electric vehicle. It is determined whether or not the power supply shoe 214 corresponding to the ground electrode is short-circuited (step S12). That is, it is determined whether or not the power supply shoe 214B is connected to the power supply shoe 214C.

Specifically, first, the switch control unit 230 closes the switches 213B, 213C, 213D, 213H, and 213I and opens the switches 213A, 213E, 213F, and 213G. Thus, the power feeding circuit 210 connects the power feeding shoe 214A (second adjacent contact) and the power feeding shoe 214B (contact to be confirmed) and the negative electrode (first electrode) via the resistor 215C and the switch 213C, The power supply shoe 214C (first adjacent contact) is connected to the positive electrode (second electrode) via the circuit 211 (first confirmation connection state). Note that since the power supply shoe 214E and the power supply shoe 214F are not connected to any of the positive electrode, the negative electrode, and the ground electrode, the switch 213J may be closed or open.
Next, the determination unit 220 determines whether or not the current detector 216B has detected a current, and determines that the power supply shoe 214B and the power supply shoe 214C are short-circuited when the current is detected.

Here, the reason for determining that the feeding shoe 214B and the feeding shoe 214C are short-circuited when the current detector 216B detects a current will be described.
FIG. 10 is a schematic diagram showing a power supply circuit 210 when determining whether or not the power supply shoe 214 corresponding to the positive electrode and the power supply shoe 214 corresponding to the ground electrode are short-circuited in the second embodiment of the present invention. is there. In FIG. 10, a circuit that is insulated because the switch 213 is open is omitted.
As shown in FIG. 10, the positive electrode and the power feeding shoes 214 </ b> C and 214 </ b> D are connected via the main circuit 211. Further, the negative electrode and the power supply shoes 214A and 214B are connected via a resistor 215C and a switch 213C.

Here, when the contact portion corresponding to the ground electrode of the electric vehicle and the power supply shoes 214A and 214B are in contact with each other and the contact portion corresponding to the positive electrode of the electric vehicle and the power supply shoes 214C and 214D are in contact, the resistor 215B and the resistor 215C. However, no current flows through the current detector 216B.
On the other hand, when the same contact portion and the power feeding shoes 214B, 214C come into contact with each other due to a shift in the stopping position of the electric vehicle, a shift in the position of the contact portion, a shift in the position of the vehicle-side contactor, the main circuit 211, the switch 213D, A current flows through a circuit including the power supply shoe 214C, the contact portion, the power supply shoe 214B, the switch 213C, and the resistor 215C. At this time, a ground electrode is also connected to the switch 213C. At this time, since the ground electrode does not form a closed circuit, no current flows through the ground electrode.

  Therefore, the current detector 216B detects a current when the power supply shoe 214 corresponding to the positive electrode and the power supply shoe 214 corresponding to the ground electrode are short-circuited, and the power supply corresponding to the power supply shoe 214 corresponding to the positive electrode and the ground electrode. The current is not detected when the shoe 214 is not short-circuited. Further, since the current flowing through the current detector 216B is limited by the resistor 215C, a large current is prevented from being generated when the power supply shoe 214 corresponding to the positive electrode and the power supply shoe 214 corresponding to the ground electrode are short-circuited. be able to. In addition, by passing a current through the main circuit 211 that does not have the resistor 215A, it is possible to prevent the flowing current from becoming too small to detect the current.

  When the determination unit 220 determines that the power supply shoe 214 corresponding to the positive electrode and the power supply shoe 214 corresponding to the ground electrode are not short-circuited (step S12: NO), the pair of power supply shoes 214 corresponding to the same electrode are connected to each other. It is determined whether or not all are connected (step S13). That is, the determination unit 220 determines whether the power supply shoe 214A and the power supply shoe 214B, the power supply shoe 214C and the power supply shoe 214D, and the power supply shoe 214E and the power supply shoe 214F are connected to each other.

Specifically, first, the switch control unit 230 closes the switches 213A, 213E, 213F, and 213G and opens the switches 213B, 213C, 213D, 213H, 213I, and 213J. Thus, in the power feeding circuit 210, when the power feeding shoe 214A and the power feeding shoe 214B, the power feeding shoe 214C and the power feeding shoe 214D, and the power feeding shoe 214E and the power feeding shoe 214F are connected, all the power feeding shoes 214 are connected in series. (Second confirmation connection state).
Next, the determination unit 220 determines whether or not the current detector 216A has detected a current. When the current is detected, the pair of power supply shoes 214 corresponding to the same electrode are all connected. judge.

Here, the reason why it is determined that a pair of power supply shoes 214 corresponding to the same electrode are all connected when the current detector 216A detects a current will be described.
FIG. 11 is a schematic diagram showing the power supply circuit 210 when determining whether or not all the pair of power supply shoes 214 corresponding to the same electrode are connected to each other in the second embodiment of the present invention. In FIG. 11, a circuit that is insulated because the switch 213 is open is omitted.
As shown in FIG. 11, the positive electrode and the feeding shoe 214 </ b> C are connected via an auxiliary circuit 212. In addition, the power supply shoe 214D is connected to the power supply shoe 214A via the switch 213F. The power supply shoe 214B is connected to the power supply shoe 214E via the switch 213G. The feeding shoe 214F and the negative electrode are connected via a switch 213E.

  At this time, when the contact portion of the electric vehicle and the feeding shoes 214A and 214B are in contact, the contact portion of the electric vehicle and the feeding shoes 214C and 214D are in contact, and the contact portion of the electric vehicle and the feeding shoes 214E and 214F are in contact, Current flows between the positive and negative electrodes. As described above, the current detector 216A detects a current when all of the pair of power supply shoes 214 corresponding to the same electrode are connected to each other, and determines whether the pair of power supply shoes 214 corresponding to the same electrode is one. If it is not connected at any place, no current is detected.

  Note that current also flows between the positive electrode and the negative electrode when the contact portion of the electric vehicle is in contact with the power supply shoes 214B and 214C and the contact portion of the electric vehicle is in contact with the power supply shoes 214E and 214F. However, since the determination in step S13 is performed when it is determined in step S12 that the power supply shoes 214B and 214C are not connected, no erroneous determination occurs. In addition, since the resistor 215A is provided in the auxiliary circuit 212, it is possible to prevent a large current from being generated when a pair of power supply shoes 214 corresponding to the same electrode are all connected.

  When determining unit 220 determines that a pair of power feeding shoes 214 corresponding to the same electrode are all connected (step S13: YES), switch control unit 230 starts supplying electricity to the electric vehicle. Is determined (step S14). The switch control unit 230 connects the pair of power supply shoes 214 corresponding to the positive electrode, the negative electrode, and the ground electrode. Specifically, the switch control unit 230 closes the switches 213B, 213C, 213D, 213E, 213H, 213I, and 213J and opens the switches 213A, 213F, and 213G.

FIG. 12 is a schematic diagram showing a power feeding circuit 210 when it is determined whether or not a pair of power feeding shoes 214 corresponding to the same electrode are all connected in the second embodiment of the present invention. In FIG. 12, a circuit that is insulated because the switch 213 is open is omitted.
As shown in FIG. 12, the power supply circuit 210 connects the power supply shoe 214A and the power supply shoe 214B, the power supply shoe 214C and the power supply shoe 214D, and the power supply shoe 214E and the power supply shoe 214F. The shoes 214A and 214B are connected to the ground electrode, the power supply shoes 214C and 214D are connected to the positive electrode, and the power supply shoes 214E and 214F are connected to the negative electrode (power supply connection state).

  Thereafter, the electric vehicle connects the contact portion corresponding to the ground electrode and the vehicle body (body earth) of the electric vehicle, connects the contact portion corresponding to the positive electrode and one end of the secondary battery of the electric vehicle, and connects the negative electrode The secondary battery of the electric vehicle can be charged by connecting the contact portion corresponding to 1 and the other end of the secondary battery.

  When the determination unit 220 determines that the power supply shoe 214 corresponding to the positive electrode and the power supply shoe 214 corresponding to the negative electrode are short-circuited (step S11: YES), the power supply shoe 214 corresponding to the positive electrode and the ground electrode are supported. When it is determined that the feeding shoe 214 to be short-circuited is short-circuited (step S12: YES), or when it is determined that the pair of feeding shoes 214 corresponding to the same electrode is not connected at one place (step S13). : NO), the power supply apparatus 200 does not supply power. In this case, the power supply apparatus 200 issues an alarm to the electric vehicle, corrects the deviation of the electric vehicle stop position, the deviation of the contact portion, the deviation of the position of the vehicle contactor, etc., and then performs the process from step S11 again. Need to do.

  Thus, according to the present embodiment, the power supply apparatus 200 determines whether or not the power supply shoes 214 connected to different electrodes are connected, and connects the electrode and the contact based on the determination result. It is determined whether or not. Thereby, it is possible to detect a contact abnormality between the contact point and the current collector without the electric vehicle having a grounding abnormality detection device.

<< Third Embodiment >>
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 13 is a schematic diagram illustrating a configuration of a power feeding device 300 according to the third embodiment of the present invention.
The power supply device 300 according to the third embodiment is different from the first embodiment in the configuration of the power supply circuit 310 and the logic of short circuit determination by the determination unit 320.
In the power supply circuit 310 according to the third embodiment, the power supply shoes 314A and 314B correspond to the ground electrode, the power supply shoes 314C and 314D correspond to the positive electrode, and the power supply shoes 314E and 314F correspond to the negative electrode. Yes. The power feeding shoes 314A to 314F are arranged in parallel in the order of 314A, 314B, 314C, 314D, 314E, and 314F.

Here, the absolute value of the positive electrode potential is equal to the absolute value of the negative electrode potential, and the positive electrode and the negative electrode are connected via a resistor 315B and a resistor 315C having the same resistance value. A point between the resistor 315B and the resistor 315C is connected to the ground electrode. For this reason, the potential at the point between the resistor 315B and the resistor 315C is 0 volts, and unless a ground fault occurs, the potential between the point between the resistor 315B and the resistor 315C and the ground electrode is not. Current does not flow.
The grounding pole of the power feeding circuit 310 is connected to the power feeding shoe 314B via the switch 313C. The power feeding shoes 314A and 314B are connected via a switch 313K.

  The positive electrode of the power feeding circuit 310 is connected to the power feeding shoes 314D and 314C via the main circuit 311, the auxiliary circuit 312 and the switch 313I provided in parallel, respectively. Here, the main circuit 311 is a circuit in which a switch 313B, a current detector 316B, and a switch 313D are connected in series. The auxiliary circuit 312 is a circuit in which a switch 313A, a resistor 315A, and a current detector 316A are connected in series. That is, by opening the switches 313A and 313I and closing the switches 313B and 313D, the positive electrode and the feeding shoe 314D can be connected via the main circuit 311. On the other hand, by closing the switches 313A and 313I and opening the switches 313B and 313D, the positive electrode and the power supply shoe 314C can be connected via the auxiliary circuit 312. The power supply shoes 314C and 314D are connected via a switch 313L.

The negative electrode of the power feeding circuit 310 is connected to the power feeding shoe 314F via the switch 313J. The power feeding shoes 314E and 314F are connected via a switch 313M.
The power feeding shoe 314A is connected to the power feeding shoe 314F via the switch 313H.
Further, the power supply shoe 314B is connected to the power supply shoe 314C via the switch 313F.
The power supply shoe 314C is connected to the power supply shoe 314E via the switch 313G.
The power supply shoe 314D is connected to the power supply shoe 314F via the switch 313E.

Next, the operation of the power supply apparatus 300 according to this embodiment will be described.
FIG. 14 is a flowchart showing the operation of the power supply apparatus 300 according to the third embodiment of the present invention.
When the contact portion of the electric vehicle comes into contact with the power supply shoe 314 of the power supply device 300, the determination unit 320 first determines whether or not the pair of power supply shoes 314 corresponding to the negative electrode is connected by the contact portion of the electric vehicle (step). S21). That is, it is determined whether or not the power supply shoe 314E and the power supply shoe 314F are connected.

  Specifically, the switch control unit 330 first closes the switches 313A, 313G, and 313J and opens the switches 313B, 313C, 313D, 313E, 313F, 313H, 313I, 313K, 313L, and 313M. As a result, the power feeding circuit 310 connects the power feeding shoe 314E (contact to be confirmed) to the positive electrode (first electrode) via the auxiliary circuit 312 and the switch 313G, and the power feeding shoe 314F (first adjacent to the first adjacent electrode) via the switch 313J. The contact) is connected to the negative electrode (second electrode), and the feeding shoe 314D (second adjacent contact) is insulated (first confirmation connection state).

  Next, the determination unit 320 determines whether or not the current detector 316A has detected a current, and determines that the power supply shoe 314E and the power supply shoe 314F are connected when the current is detected.

Here, the reason for determining that the power supply shoe 314E and the power supply shoe 314F are connected when the current detector 316A detects a current will be described.
FIG. 15 is a schematic diagram illustrating a power feeding circuit 310 when determining whether or not the power feeding shoes 314 corresponding to the negative electrodes are connected to each other in the third embodiment of the present invention. In FIG. 15, circuits that are insulated because the switch 313 is open are omitted.
As shown in FIG. 15, the positive electrode and the power feeding shoe 314E are connected via an auxiliary circuit 312 and a switch 313G. The negative electrode and the power supply shoe 314F are connected via a switch 313J.

Here, when the contact portion corresponding to the negative electrode of the electric vehicle and the power feeding shoes 314E and 314F come into contact with each other, a current flows between the positive electrode and the negative electrode.
On the other hand, when the same contact portion and the power supply shoes 314D and 314E come into contact with each other due to a shift in the stopping position of the electric vehicle, a shift in the position of the contact portion, a shift in the position of the vehicle-side contactor, the power supply shoe 314D is insulated. In addition, since the power feeding shoes 314E and 314F are not in contact with each other, no current flows between the positive electrode and the negative electrode.

  Therefore, the current detector 316A does not detect a current when the power supply shoe 314 corresponding to the positive electrode and the power supply shoe 314 corresponding to the negative electrode are short-circuited. On the other hand, a current is detected when the power supply shoe 314 corresponding to the positive electrode and the power supply shoe 314 corresponding to the negative electrode are not short-circuited and the power supply shoes 314 corresponding to the negative electrode are connected to each other. In addition, since the resistor 315A is provided in the auxiliary circuit 312, it is possible to prevent a large current from being generated when the power feeding shoes 314 corresponding to the negative electrode are connected to each other.

  When determining unit 320 determines that power supply shoes 314 corresponding to the negative electrodes are connected to each other (step S21: YES), is a pair of power supply shoes 314 corresponding to the ground electrode connected by the contact part of the electric vehicle? It is determined whether or not (step S22). That is, it is determined whether or not the power supply shoe 314A and the power supply shoe 314B are connected.

  Specifically, the switch control unit 330 first closes the switches 313A, 313F, and 313H, and opens the switches 313B, 313C, 313D, 313E, 313G, 313I, 313J, 313K, 313L, and 313M. Thereby, the power feeding circuit 310 connects the power feeding shoe 314B (contact for confirmation) and the positive electrode (first electrode) via the auxiliary circuit 312 and the switch 313F, and feeds the power feeding shoe 314A (first first electrode) via the switch 313H. The adjacent contact) is connected to the negative electrode (second electrode), and the power supply shoe 314C (second adjacent contact) is insulated (first confirmation connection state).

  Next, the determination unit 320 determines whether or not the current detector 316A has detected a current, and determines that the power supply shoe 314A and the power supply shoe 314B are connected when the current is detected.

Here, the reason why it is determined that the power supply shoe 314A and the power supply shoe 314B are connected when the current detector 316A detects a current will be described.
FIG. 16 is a schematic diagram showing a power feeding circuit 310 when it is determined whether or not the power feeding shoes 314 corresponding to the ground pole are connected to each other in the third embodiment of the present invention. In FIG. 16, circuits that are insulated because the switch 313 is open are omitted.
As shown in FIG. 16, the positive electrode and the power supply shoe 314B are connected via the auxiliary circuit 312 and the switch 313F. Further, the negative electrode and the power supply shoe 314A are connected via a switch 313H.

Here, when the contact portion corresponding to the ground electrode of the electric vehicle comes into contact with the power supply shoes 314A and 314B, a current flows between the positive electrode and the negative electrode.
On the other hand, when the same contact portion and the power supply shoes 314B and 314C come into contact with each other due to a shift in the stopping position of the electric vehicle, a shift in the position of the contact portion, a shift in the position of the vehicle-side contactor, the power supply shoe 314C is insulated. In addition, since the power feeding shoes 314A and 314B are not in contact with each other, no current flows between the positive electrode and the negative electrode.

  Therefore, the current detector 316A does not detect a current when the power supply shoe 314 corresponding to the positive electrode and the power supply shoe 314 corresponding to the ground electrode are short-circuited. On the other hand, the current is detected when the power supply shoe 314 corresponding to the positive electrode and the power supply shoe 314 corresponding to the ground electrode are not short-circuited and the power supply shoes 314 corresponding to the ground electrode are connected to each other. In addition, since the resistor 315A is provided in the auxiliary circuit 312, it is possible to prevent a large current from being generated when the power feeding shoes 314 corresponding to the ground electrode are connected to each other.

  When determining unit 320 determines that power supply shoes 314 corresponding to the grounding electrodes are connected to each other (step S22: YES), is a pair of power supply shoes 314 corresponding to the positive electrode connected by the contact part of the electric vehicle? It is determined whether or not (step S23). That is, it is determined whether or not the power supply shoe 314C and the power supply shoe 314D are connected.

  Specifically, first, the switch controller 330 closes the switches 313A, 313E, and 313I, and opens the switches 313B, 313C, 313D, 313F, 313G, 313H, 313J, 313K, 313L, and 313M. Thus, the power supply circuit 310 connects the power supply shoe 314C and the positive electrode via the auxiliary circuit 312 and the switch 313I, connects the power supply shoe 314D to the negative electrode via the switch 313E, and insulates the power supply shoes 314B and E. It becomes.

  Next, the determination unit 320 determines whether or not the current detector 316A has detected a current, and determines that the power supply shoe 314C and the power supply shoe 314D are connected when the current is detected.

Here, the reason why it is determined that the power supply shoe 314C and the power supply shoe 314D are connected when the current detector 316A detects a current will be described.
FIG. 17 is a schematic diagram illustrating a power feeding circuit 310 when determining whether or not the power feeding shoes 314 corresponding to the positive electrodes are connected to each other in the third embodiment of the present invention. In FIG. 17, a circuit that is insulated because the switch 313 is open is omitted.
As shown in FIG. 17, the positive electrode and the power supply shoe 314C are connected via an auxiliary circuit 312 and a switch 313I. The negative electrode and the power supply shoe 314D are connected via a switch 313E.

Here, when the contact portion corresponding to the ground electrode of the electric vehicle comes into contact with the power feeding shoes 314C and 314D, a current flows between the positive electrode and the negative electrode.
On the other hand, when the same contact portion and the power feeding shoes 314B and 314C come into contact with each other due to a shift in the stopping position of the electric vehicle, a shift in the position of the contact portion, a shift in the position of the vehicle-side contactor, or the power feeding shoes 314D and 314E Are in contact with each other and the power supply shoes 314C and 314D are not in contact with each other, so that no current flows between the positive electrode and the negative electrode.

  Therefore, the current detector 316A detects a current when the power supply shoes 314 corresponding to the positive electrodes are connected to each other. In addition, since the resistor 315A is provided in the auxiliary circuit 312, it is possible to prevent a large current from being generated when the power feeding shoes 314 corresponding to the positive electrodes are connected to each other.

  When the determination unit 320 determines that the power supply shoes 314 corresponding to the positive electrodes are connected to each other (step S23: YES), the switch control unit 330 determines to start supplying electricity to the electric vehicle (step S23). S24). The switch control unit 330 connects the pair of power supply shoes 314 corresponding to the positive electrode, the negative electrode, and the ground electrode. Specifically, the switch control unit 330 closes the switches 313B, 313C, 313D, 313J, 313K, 313L, and 313M and opens the switches 313A, 313E, 313F, 313G, 313H, and 313I.

FIG. 18 is a schematic diagram showing a power feeding circuit 310 at the time of power feeding in the third embodiment of the present invention. In FIG. 18, a circuit that is insulated because the switch 313 is open is omitted.
As shown in FIG. 18, the power supply circuit 310 connects the power supply shoe 314A and the power supply shoe 314B, the power supply shoe 314C and the power supply shoe 314D, and the power supply shoe 314E and the power supply shoe 314F. The shoes 314A and 314B are connected to the ground electrode, the power supply shoes 314C and 314D are connected to the positive electrode, and the power supply shoes 314E and 314F are connected to the negative electrode (power supply connection state).

  Thereafter, the electric vehicle connects the contact portion corresponding to the ground electrode and the vehicle body (body earth) of the electric vehicle, connects the contact portion corresponding to the positive electrode and one end of the secondary battery of the electric vehicle, and connects the negative electrode The secondary battery of the electric vehicle can be charged by connecting the contact portion corresponding to 1 and the other end of the secondary battery.

  Note that when the determination unit 320 determines that the pair of power supply shoes 314 are not connected to each other (steps S21, S22, S23: NO), the power supply apparatus 300 does not supply power. In this case, the power feeding device 300 issues an alarm to the electric vehicle, corrects the deviation of the stopping position of the electric vehicle, the deviation of the position of the contact portion, the deviation of the position of the vehicle-side contactor, etc., and then performs the process from step S21 again. Need to do.

  Thus, according to the present embodiment, the power supply apparatus 300 determines whether or not the power supply shoes 314 connected to different electrodes are connected to each other, and connects the electrode and the contact point based on the determination result. It is determined whether or not. Thereby, it is possible to detect a contact abnormality between the contact point and the current collector without the electric vehicle having a grounding abnormality detection device.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to

  DESCRIPTION OF SYMBOLS 100, 200, 300 ... Feeding device 110, 210, 310 ... Feeding circuit 111, 211, 311 ... Main circuit 112, 212, 312 ... Auxiliary circuit 113, 213, 313 ... Switch 114, 214, 314 ... Feeding shoe 115, 215 315: Resistor 116, 216, 316 ... Current detector 120, 220, 320 ... Determination unit 130, 230, 330 ... Switch control unit

Claims (10)

There are a plurality of contacts arranged in a row at intervals, and these contacts form a pair of two adjacent ones to form a plurality of contact pairs corresponding to each of a plurality of electrodes having different potentials. A power supply device for supplying electricity to the vehicle through these contact pairs,
A determination unit that determines whether a contact of one contact pair is connected to a contact of another contact pair;
A determination unit that determines to connect one contact pair and the electrode corresponding to the contact pair when it is determined that the contact of the one contact pair is not connected to the contact of the other contact pair. A power supply apparatus comprising: The determination unit further determines whether or not the contacts forming a pair are connected to each other in all the contact pairs,
The determination unit determines that the contact of one contact pair is not connected to the contact of the other contact pair, and determines that all the contact pairs are connected to each other. When it does, it determines to connect the said one contact point pair and the said electrode corresponding to the said contact pair. The electric power feeder of Claim 1 characterized by the above-mentioned. A connection state for power supply for supplying electricity to the vehicle, wherein each of the contact pairs and an electrode corresponding to the contact pair are connected, and
A first contact that is one of the plurality of contacts arranged in a row and a first electrode selected from the plurality of electrodes is connected, and is the contact adjacent to the confirmation contact. A second contact that is connected to a second electrode that is different from the first electrode and that is different from the first adjacent contact adjacent to the contact to be confirmed; A switch circuit capable of switching between a first confirmation connection state for confirming the presence or absence of a short circuit, in which one electrode is connected or the second adjacent contact is insulated from all the electrodes;
A detector for detecting a current flowing between the first electrode and the contact to be confirmed or between the second electrode and the first adjacent contact in the first confirmation connection state;
A resistor provided between the first electrode and the contact to be confirmed in the first confirmation connection state or between the second electrode and the first adjacent contact;
With
Whether the determination unit is connected to a contact of a contact pair different from a contact pair constituting the confirmation target contact based on a detection result of the detector in the first confirmation connection state. Determine whether or not
The determination unit determines that, for all contact pairs adjacent to each other in different contact pairs, the confirmation target contact is not connected to a contact of a contact pair different from the contact pair constituting the confirmation target contact. The power supply apparatus according to claim 1, wherein the switch circuit is determined to be switched to the power supply connection state. In addition to the power supply connection state and the first confirmation connection state, the switch circuit connects all the contacts in series when the contact points are connected for each of the contact pairs. Can be switched to the second confirmation connection state for confirmation,
The detector detects a current flowing between the first electrode and the check target contact or between the second electrode and the first adjacent contact in the first check connection state; And when the contacts are connected to each other for each of the contact pairs in the second confirmation connection state, a current in a location in series with all the contacts is detected,
The resistor is between the first electrode and the contact to be confirmed or between the second electrode and the first adjacent contact in the first confirmation connection state, and the first When the contact points are connected to each other for each of the contact pairs in the confirmation connection state of 2, the contact points are provided in places where all the contact points are in series,
The determination unit determines whether or not the contacts are connected for each of the contact pairs based on the detection result of the detector in the second confirmation connection state,
The determination unit determines that the contact for confirmation is not connected to a contact of a contact pair different from a contact pair constituting the confirmation contact for all contact pairs adjacent to each other in different contact pairs, and The power supply apparatus according to claim 3, wherein when it is determined that the contacts are connected to each other for each contact pair, the switch circuit is determined to be switched to the power supply connection state. A first circuit including the resistor and a second circuit not including the resistor are provided between at least one of the electrodes and the contact pair corresponding to the electrode,
When the switch circuit switches to the first confirmation connection state, the switch circuit connects the electrode to the confirmation target contact or the first adjacent contact via the first circuit, and the power supply connection state. 5. The power feeding device according to claim 3, wherein when the switching is performed, the electrode and a contact pair corresponding to the electrode are connected via the second circuit. The confirmation target contact and the first adjacent contact form the contact pair,
The determination unit is configured such that when the detector detects a current in the first confirmation connection state, the confirmation target contact is connected to a contact of a contact pair different from the contact pair constituting the confirmation target contact. It determines with not existing. The electric power feeder of any one of Claims 3-5 characterized by the above-mentioned. The confirmation target contact and the second adjacent contact form the contact pair,
The determination unit is configured such that, when the detector does not detect current in the first confirmation connection state, the confirmation target contact is connected to a contact of a contact pair different from the contact pair constituting the confirmation target contact. It determines with not existing. The electric power feeder of any one of Claims 3-5 characterized by the above-mentioned. There are a plurality of contacts arranged in a row at intervals, and these contacts form a pair of two adjacent ones to form a plurality of contact pairs corresponding to each of a plurality of electrodes having different potentials. , A power supply method using a power supply device that supplies electricity to the vehicle through these contact pairs,
A first step of determining whether a contact of one contact pair is connected to a contact of another contact pair;
When it is determined that a contact of one contact pair is not connected to a contact of another contact pair, a second determination is made to connect the one contact pair and the electrode corresponding to the contact pair. A power supply method comprising the steps of: Before the second step, it has a third step of determining whether or not the contacts forming a pair are connected to each other in all the contact pairs,
In the second step, it is determined that the contact of one contact pair is not connected to the contact of the other contact pair, and all the contact pairs are connected to each other in pairs. The power supply method according to claim 8, further comprising: determining that the one contact pair is connected to the electrode corresponding to the contact pair. In the first step, the power supply device is connected to a confirmation target contact that is one of the plurality of contacts arranged in a row and a first electrode selected from the plurality of electrodes, and the confirmation target The first adjacent contact that is the contact adjacent to the contact and the second electrode that is the electrode different from the first electrode are connected, and are different from the first adjacent contact adjacent to the contact to be confirmed A first confirmation for confirming the presence or absence of a short circuit, wherein the second adjacent contact as the contact and the first electrode are connected, or the second adjacent contact is insulated from all the electrodes. Whether the contact to be confirmed is connected to a contact of a contact pair different from the contact pair constituting the contact to be confirmed based on the detection result of the detector in the first confirmation connection state. Determine whether or not
In the second step, when it is determined that, for all contact pairs adjacent to each other in different contact pairs, the check target contact is not connected to a contact of a contact pair different from the contact pair constituting the check target contact In addition, the power feeding device is switched to a power feeding connection state for supplying electricity to the vehicle in which each of the contact pairs and an electrode corresponding to the contact pair are connected. The power feeding method according to claim 8 or 9.

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