JP5754348B2 - Vehicle charging / discharging device - Google Patents

Description

  The present invention relates to a charging / discharging device for a vehicle that connects a charging / discharging plug to a vehicle and charges or discharges a storage battery mounted on the vehicle.

  Vehicles such as EVs (Electric Vehicles) and PHVs (Plug in Hybrid Vehicles) are equipped with storage batteries that store the power supplied to the motors (motors) that serve as the prime movers of the vehicles. Charging for charging the storage batteries A device is considered. On the other hand, for example, a discharge device for discharging electric power stored in a storage battery of a vehicle has been considered for the purpose of compensating for a shortage of power supply during a disaster. In this type of device, a relay is employed to bring the charging path and the discharging path into an energized state. And when a relay is used, the welding determination of the contact of a relay is performed like the apparatus of patent document 1, for example.

JP 2011-135767 A

  By the way, abnormality determination such as welding in the charging device and the discharging device can be performed when electric power is supplied to these devices. In particular, in the determination of the presence or absence of welding, since it is determined that there is a possibility of welding when current is flowing in a situation where there is essentially no flaw flowing in the device, power must be supplied to the device. It becomes. For this reason, in the case of the above-described charging device, since the connection destination is an electric power system, electric power is always supplied to the device, and if a voltage at a predetermined position in the device is detected, an abnormality such as welding occurs. It can be determined whether or not. However, in the case of the above-described discharge device, there are cases where power is supplied into the device for discharge and cases where power is not supplied into the device. It is not possible to make an abnormality judgment.

  The present invention has been made paying attention to such problems existing in the prior art, and an object of the present invention is to provide a vehicle charging / discharging device capable of reliably determining an abnormality in a discharge path. There is.

In order to solve the above problems, the invention according to claim 1 is a vehicle charging / discharging device for connecting a charging / discharging plug to a vehicle and charging a storage battery mounted on the vehicle or discharging from the storage battery. A charging time switching means for switching the charging path to the energized state during charging, a discharging time switching means for switching the discharging path to the energized state during discharging, and a first for switching the charging path to the energized state during charging. outputs a drive signal to the charge time switching means, and switching control means for outputting a second driving signal for switching the discharge path to the conduction state to the discharge time of the switching means at the time of discharging, during charging, the the charging path is placed in the energized state is output first drive signal, in a state where the second drive signal is not output, it detects the output side of the voltage of the discharge time of the switching means And abnormality determining means for determining an abnormality in case, further comprising a a gist.

  According to this, abnormality determination on the discharge side can be performed using the fact that power is supplied to the charging apparatus. That is, when switched to the energized state by the charging time switching means, if normal, power is supplied to the storage battery of the vehicle via the charge / discharge plug. However, when a voltage is detected on the output side of the discharging switching means that is not energized during the charging state, the state can be determined as abnormal. Therefore, the abnormality determination of the discharge path can be performed reliably.

  According to a second aspect of the present invention, in the vehicle charging / discharging device according to the first aspect, the abnormality determination unit is configured to switch the discharge time switching unit in a state where the second drive signal is not output during the discharge. The gist is to determine that an abnormality is detected even when the output side voltage is detected.

  According to this, it is possible to reliably determine the abnormality of the discharge path by detecting the voltage on the output side of the discharge switching means while the second drive signal is not output even during discharge. it can.

  According to a third aspect of the present invention, there is provided the vehicle charging / discharging device according to the first or second aspect, wherein the charging time switching means switches the charging path between an energized state and a non-energized state. The discharge switching means includes a second contact for switching the discharge path between an energized state and a non-energized state, and the abnormality determining means determines whether or not the second contact is welded as an abnormality determination. The gist of this is to determine.

  According to this, it is possible to determine whether or not the second contact that constitutes the discharging switching means is welded. Therefore, in a device that performs charging and discharging using a charging / discharging plug, by determining whether or not the second contact that constitutes the discharging switching means is welded, discharging is performed during charging, and the storage battery is charged. It can suppress that charging efficiency falls.

  According to the present invention, it is possible to reliably determine the welding of the discharge path.

The block diagram which shows the structure of the charging / discharging apparatus for vehicles. The schematic diagram which shows the normal operation | movement at the time of charge. The schematic diagram which shows the abnormal operation | movement at the time of charge. The schematic diagram which shows the normal operation | movement at the time of discharge. The schematic diagram which shows the abnormal operation | movement at the time of discharge. The block diagram which shows the structure of the charging / discharging apparatus for vehicles in 2nd Embodiment. The block diagram which shows operation | movement of the charging / discharging apparatus for vehicles at the time of charge. The block diagram which shows operation | movement of the charging / discharging apparatus for vehicles at the time of discharge.

(First embodiment)
A first embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the vehicle charging / discharging device 10 is connected to an electric power system 11, and when charging or discharging the storage battery 13 mounted on the vehicle 12, the charging / discharging plug P It is connected to the vehicle 12 via. The charging / discharging device 10 for a vehicle is a charging-side electromagnetic contactor (magnet contactor) MC1 as a charging switching means for switching a charging path K1 between the power system 11 serving as a power supply source and the vehicle 12 to an energized state during charging. It has. The charging-side electromagnetic contactor MC1 is electrically connected to a charging-side controller 14 as switching control means. The charge side controller 14 opens and closes the contact which comprises charge side electromagnetic contactor MC1 by outputting an electrical signal.

  In addition, the vehicle charging / discharging device 10 includes a discharge-side electromagnetic contactor (magnet contactor) as a discharge-time switching unit that switches a discharge path K2 between the power system 11 serving as a power discharge destination and the vehicle 12 to an energized state during discharge. ) MC2 is provided. The discharge-side electromagnetic contactor MC2 is electrically connected to a discharge-side controller 15 as switching control means. The discharge-side controller 15 opens and closes the contacts constituting the discharge-side electromagnetic contactor MC2 by outputting an electrical signal.

  The vehicle charging / discharging device 10 includes a controller 16 that controls the charging-side controller 14 and the discharging-side controller 15, and the controller 16 is connected to the charging-side controller 14 and the discharging-side controller 15 so as to be capable of bidirectional communication. Has been. The controller 16 outputs a charge execution instruction to the charge-side controller 14 and outputs a discharge execution instruction to the discharge-side controller 15. Moreover, while the vehicle charging / discharging apparatus 10 is provided with the power supply 17, the power supply 17 is between the electric power grid | system 11 and charge side electromagnetic contactor MC1, ie, the primary side used as the input side of charge side electromagnetic contactor MC1. It is connected to the. The power source 17 is electrically connected to each of the charging side controller 14, the discharging side controller 15, and the controller 16, and supplies power. Moreover, the electric power interruption | blocking part 18 which interrupts | blocks the flow of an electric current when an overcurrent flows is connected to the primary side of charge side magnetic contactor MC1.

  The charge controller 14 is connected to the charge controller 14 for detecting the secondary voltage between the charge / discharge plug P and the charge electromagnetic contactor MC1, that is, the output side of the charge contact magnetic contactor MC1. Has been. The charge-side controller 14 inputs the detection result of the charge / discharge detection unit 19. In addition, a charge / discharge detection unit 20 that detects a voltage is connected between the charge controller 14 and the charge / discharge plug P. The charge side controller 14 of this embodiment confirms the connection with the vehicle 12 side by the CPLT (control pilot) function based on the detection result of the charge / discharge detection unit 20. On the other hand, the discharge controller 15 is connected with a charge / discharge detector 21 for detecting a secondary voltage between the power system 11 and the discharge electromagnetic contactor MC2, that is, the output side of the discharge electromagnetic contactor MC2. ing. The discharge-side controller 15 inputs the detection result of the charge / discharge detection unit 21. In the vehicle charging / discharging device 10 of the present embodiment, the primary side of the charging-side electromagnetic contactor MC1 is connected to the power system 11 via the power cut-off unit 18, and the secondary side of the charging-side electromagnetic contactor MC1 is charged / discharged. The charging path K1 is configured by a power transmission line connected to the vehicle 12 via the plug P and connecting them. Moreover, in the vehicle charging / discharging device 10 of the present embodiment, the primary side of the discharge-side electromagnetic contactor MC2 is connected to the vehicle 12 via the charge / discharge plug P, and the secondary side of the discharge-side electromagnetic contactor MC2 is power. A discharge path K2 is configured by a power transmission line connected to the system 11 and connecting them.

Hereinafter, the configuration of the charging-side electromagnetic contactor MC1 and the discharging-side electromagnetic contactor MC2 will be described in more detail.
The charging-side electromagnetic contactor MC1 includes a plurality (two in the embodiment) of contacts S1 and S2, and the discharge-side electromagnetic contactor MC2 includes a plurality (two in the embodiment) of contacts S5 and S6. ing. The contacts S1 and S2 of the charging-side electromagnetic contactor MC1 and the contacts S5 and S6 of the discharging-side electromagnetic contactor MC2 are a-contacts (normally open contacts). The contacts S1, S2 of the charging-side electromagnetic contactor MC1 switch the charging path K1 between an energized state and a non-energized state. Specifically, the contacts S1 and S2 of the charging-side electromagnetic contactor MC1 make the charging path K1 non-energized in the open state, while making the charging path K1 energized in the closed state. On the other hand, the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 switch the discharge path K2 between an energized state and a non-energized state. Specifically, the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 make the discharge path K2 non-energized in the open state, while making the discharge path K2 energized in the closed state. In the present embodiment, the first contact is configured by the contacts S1 and S2 of the charging-side electromagnetic contactor MC1, and the second contact is configured by the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2.

  When the charging side controller 14 outputs an electrical signal for switching the charging path K1 to the energized state when the contacts S1 and S2 are in the open state, the charging side electromagnetic contactor MC1 of the present embodiment receives the signal. The contacts S1 and S2 operate in the closed state. When operated in this way, the charging path K1 switches from the non-energized state to the energized state. In the present embodiment, the electrical signal for switching the charging path K1 to the energized state is the first drive signal. On the other hand, when the charging side controller 14 outputs an electrical signal for switching the charging path K1 to the non-energized state when the contacts S1 and S2 are in the closed state, the charging side electromagnetic contactor MC1 is contacted by the input of the signal. S1 and S2 are opened. When operated in this way, the charging path K1 is switched from the energized state to the non-energized state.

  In addition, when the contacts S5 and S6 are in the open state, the discharge-side electromagnetic contactor MC2 according to the present embodiment outputs an electric signal for switching the discharge path K2 to the energized state. The contacts S5 and S6 operate in a closed state by input. When operated in this way, the discharge path K2 switches from the non-energized state to the energized state. In the present embodiment, the electrical signal for switching the discharge path K2 to the energized state is the second drive signal. On the other hand, when the contacts S5 and S6 are closed, the discharge-side electromagnetic contactor MC2 outputs an electrical signal for switching the discharge path K2 to the non-energized state when the contacts S5 and S6 are closed. S5 and S6 operate in the open state. When operated in this way, the discharge path K2 switches from the energized state to the non-energized state.

Hereinafter, the effect | action of the charging / discharging apparatus 10 for vehicles of this embodiment is demonstrated.
The vehicle charging / discharging device 10 of the present embodiment has a function of performing abnormality determination of the contacts S5 and S6 constituting the discharge-side electromagnetic contactor MC2, specifically, welding determination. The welding in the present embodiment means that the contacts S5 and S6 maintain the closed state when the contacts S5 and S6 operate from the open state to the closed state, and the contact part melts and solidifies by heat. When the contacts S5 and S6 are welded in this way, the energized state is maintained, so that the battery is always discharged. That is, even when the charging path K1 is energized for charging, the current is discharged to the power system 11 via the discharge-side electromagnetic contactor MC2.

And in the charging / discharging apparatus 10 for vehicles of this embodiment, the welding determination mentioned above is each performed at the time of charge and discharge.
Initially, the welding determination at the time of charge is demonstrated using FIG.2 and FIG.3.

  The controller 16 inputs the detection result of the charge / discharge detection unit 20 connected to the charge / discharge plug P via the charge-side controller 14 and confirms the connection with the vehicle 12 from the detection result. Then, when the voltage detected by the charge / discharge detection unit 20 is a predetermined voltage (CPLT voltage = 6V in FIG. 2), the controller 16 confirms that it is connected to the vehicle 12 and charges the charging controller 14. Send start instructions. As shown in FIGS. 2 and 3, the CPLT voltage is changed from 9V to 6V by the control of the vehicle 12, and the connection with the vehicle 12 is confirmed by the change of the voltage. At the same time, charging is started.

  And the charge side controller 14 will output the electric signal for switching the charging path | route K1 to an electricity supply state to the charge side electromagnetic contactor MC1, if the instruction | indication of a charge start is received. Further, the charging-side electromagnetic contactor MC1 changes the contacts S1 and S2 from the open state to the closed state by an electrical signal. As a result, the charging path K1 between the electric power system 11 and the vehicle 12 is energized, and electric power is supplied to the storage battery 13 of the vehicle 12 via the charge / discharge plug P to perform charging. At this time, the secondary side voltage (charging voltage) of the charging-side electromagnetic contactor MC1 is V1, as shown in FIGS.

  When the contacts S5 and S6 are not welded, that is, during normal operation, as shown in FIG. 2, the secondary side voltage (discharge voltage) of the discharge side magnetic contactor MC2 is 0V. Further, at the time of charging, as shown in FIG. 2, an electrical signal (discharge relay signal) for switching the discharge path K2 to the energized state by the discharge-side controller 15 is not output. Therefore, the discharge-side controller 15 determines that the contacts S5 and S6 are not welded from the state in which the charge / discharge detection unit 21 does not detect the voltage and does not output the discharge relay signal. This determination result is transmitted to the controller 16.

  On the other hand, when the contacts S5 and S6 are welded, that is, during an abnormal operation, the secondary side voltage (discharge voltage) of the discharge side magnetic contactor MC2 does not become 0V as shown in FIG. At this time, the voltage detected by the charge / discharge detection unit 21 is V1 during charging, that is, because the charging-side electromagnetic contactor MC1 is energized. Therefore, as shown in FIG. 3, the discharge-side controller 15 welds the contacts S5 and S6 from the state in which the charge / discharge detector 21 detects the voltage even though it does not output the discharge relay signal. It is determined that This determination result is transmitted to the controller 16.

  As described above, the welding determination of the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 during charging is performed depending on whether or not a voltage is detected on the secondary side of the discharge-side electromagnetic contactor MC2. The vehicle charging / discharging device 10 is configured not to perform charging and discharging at the same time. For this reason, normally, since the discharge path K2 during charging is in a non-energized state, the discharge voltage (the voltage on the secondary side of the discharge-side electromagnetic contactor MC2) is not detected. Therefore, in terms of control, when a voltage is detected on the discharge path K2 even though the discharge relay signal for energizing the discharge path K2 is not output and the non-energized state is detected, the machine Therefore, it can be determined that the energized state is present, that is, welding has occurred. In the present embodiment, the discharge-side controller 15 that performs welding determination at the time of charging functions as an abnormality determining unit.

Next, the welding determination at the time of discharge is demonstrated using FIG.4 and FIG.5.
As described above, when confirming that the controller 16 is connected to the vehicle 12, the controller 16 transmits a discharge start instruction to the discharge-side controller 15. And the discharge side controller 15 will output the electric signal for switching the discharge path | route K2 to an energized state to the discharge side electromagnetic contactor MC2, if the instruction | indication of a discharge start is received. Further, the discharge-side electromagnetic contactor MC2 changes the contacts S5 and S6 from the open state to the closed state by an electrical signal. As a result, the discharge path K2 between the electric power system 11 and the vehicle 12 is energized, and the electric power stored in the storage battery 13 of the vehicle 12 is discharged via the charge / discharge plug P. At this time, the voltage (discharge voltage) on the secondary side of the discharge-side electromagnetic contactor MC2 becomes V2, as shown in FIGS. V2 indicates a lower voltage value than V1.

  By the way, in the case of discharge, as shown in FIGS. 4 and 5, the vehicle 12 starts discharging after a predetermined time (x seconds in the figure) has elapsed since the CPLT voltage was changed from 9 V to 6 V. For this reason, as shown in FIGS. 4 and 5, the voltage on the primary side of the discharge-side electromagnetic contactor MC2 becomes V2 after x seconds after the CPLT voltage drops from 9V to 6V. The welding determination at the time of discharge is based on the premise that the vehicle 12 is discharging, that is, the current is flowing through the discharge path K2. That is, when the vehicle 12 is not discharging, it is impossible to determine whether the vehicle 12 is operating normally or abnormally. Therefore, the welding determination is performed at the timing when the vehicle 12 discharges (after x seconds in the embodiment). Do.

  On the other hand, even when the welding determination is performed after the discharge controller 15 outputs an electrical signal for switching the discharge path K2 to the energized state to the discharge electromagnetic contactor MC2, it is determined whether the operation is normal or abnormal. It is impossible. That is, in this case, since the discharge path K2 is switched to the energized state in a controlled manner, even if a voltage is detected on the secondary side of the discharge-side electromagnetic contactor MC2, whether the operation is normal from the detection result, Alternatively, it is impossible to determine whether the operation is abnormal. Therefore, the welding determination at the time of discharging is performed from the time when the vehicle 12 discharges to the time when the discharge-side controller 15 outputs an electric signal (discharge relay signal) for switching the discharging path K2 to the energized state. Thus, accurate discrimination can be performed. In the present embodiment, as shown in FIGS. 4 and 5, after the CPLT signal is changed from 9V to 6V, welding determination is performed after elapse of a predetermined time (y seconds in the figure) longer than x seconds. Note that the execution timing of the welding determination is determined by the controller 16, and the controller 16 outputs the welding check permission signal shown in FIGS. 4 and 5 to the discharge-side controller 15 after elapse of y seconds to execute the welding determination. Instruct. Note that x seconds is a predetermined time with the vehicle 12. The y seconds is a time determined in advance by the control program for the vehicle charging / discharging device 10.

  When the contacts S5 and S6 are not welded, that is, during normal operation, as shown in FIG. 4, since the discharge relay signal is not output, the secondary side voltage (discharge voltage) of the discharge side electromagnetic contactor MC2 is not output. ) Becomes 0V. Therefore, the discharge-side controller 15 determines that the contacts S5 and S6 are not welded from the state in which the charge / discharge detection unit 21 does not detect the voltage. This determination result is transmitted to the controller 16.

  On the other hand, when the contacts S5 and S6 are welded, that is, during an abnormal operation, the secondary side voltage (discharge voltage) of the discharge side magnetic contactor MC2 does not become 0V as shown in FIG. At this time, the voltage detected by the charge / discharge detection unit 21 is V2. Therefore, as shown in FIG. 5, the discharge-side controller 15 welds the contacts S5 and S6 from the state in which the charge / discharge detector 21 detects the voltage even though it does not output the discharge relay signal. It is determined that This determination result is transmitted to the controller 16.

  As described above, the welding determination of the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 during discharge is performed depending on whether or not a voltage is detected on the secondary side of the discharge-side electromagnetic contactor MC2. However, in the case of discharging, the welding determination is accurate unless considering that the vehicle 12 is discharged to the vehicle charging / discharging device 10 side and that the discharge path K2 is not controlled to be energized. Can not do. Therefore, in the present embodiment, by performing welding determination under time management, a discharge relay signal for energizing the discharge path K2 is not output in terms of control, and it is in a non-energized state. Regardless, if a voltage is detected in the discharge path K2, it can be determined that the machine is in a mechanically energized state, that is, welding has occurred. In the present embodiment, the discharge-side controller 15 that performs welding determination at the time of discharging functions as an abnormality determining unit.

  Further, at the time of discharging, in addition to the welding determination of the contacts S5 and S6 of the discharge side magnetic contactor MC2, immobility determination is also performed as an abnormality determination. The immobility in the present embodiment is that no voltage is detected on the secondary side of the discharge-side electromagnetic contactor MC2 even if a discharge relay signal is output. In this case, the contacts S5 and S6 are changed from the open state to the closed state. Not working. The discharge-side controller 15 determines that the contacts S5 and S6 are immobile when the charge / discharge detection unit 21 does not detect a voltage after outputting the discharge relay signal. This determination result is transmitted to the controller 16. In the present embodiment, the discharge-side controller 15 that performs immobility determination during discharge functions as an abnormality determination unit.

  In the above, the welding determination of the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 has been described. However, in the vehicle charging / discharging device 10 of the present embodiment, the contacts S1 and S2 of the charging-side electromagnetic contactor MC1 are welded as an abnormality determination. A determination is also made. The welding determination of the contacts S1 and S2 is performed based on the detection result of the charge / discharge detection unit 19 disposed on the secondary side of the charging-side electromagnetic contactor MC1. That is, in terms of control, the charging side magnetic contactor MC1 does not output an electrical signal for energizing the charging path K1 and is in a non-energized state, but the voltage is charged in the charging path K1. When it is detected, it can be determined that a mechanically energized state, that is, welding has occurred. In the present embodiment, the charging-side controller 14 that performs welding determination of the contacts S1 and S2 of the charging-side electromagnetic contactor MC1 functions as an abnormality determining unit. Note that the welding determination of the contacts S1 and S2 of the charging-side electromagnetic contactor MC1 is different from the welding determination of the contacts S5 and S6 of the discharging-side electromagnetic contactor MC2, and power is always supplied from the power system 11 to the vehicle charging / discharging device 10 side. Can be carried out even when not charging or discharging.

Therefore, according to the present embodiment, the following effects can be obtained.
(1) During charging, when a voltage on the secondary side of the discharge-side electromagnetic contactor MC2 is detected in a state where an electrical signal for switching the discharge path K2 to the energized state is not output, the contacts S5 and S6 It is judged that the welding phenomenon has occurred. That is, it is possible to reliably determine whether or not the discharge path K2 is welded.

  (2) By determining whether or not the discharge path K2 is welded as described above, it is possible to suppress discharge during charging and decrease in charging efficiency to the storage battery 13. That is, during charging, the storage battery 13 of the vehicle 12 can be reliably charged. Then, by determining whether or not the discharge path K2 is welded, it is possible to provide a device configuration that switches between a charging state and a discharging state using a single charging / discharging plug P, and the charging and discharging plugs are separately provided. Charging / discharging can be performed without providing it.

  (3) Further, during discharge, when a voltage on the secondary side of the discharge-side electromagnetic contactor MC2 is detected in a state where an electric signal for switching the discharge path K2 to the energized state is not output, It is determined that a welding phenomenon has occurred in S5 and S6. That is, it is possible to reliably determine whether or not the discharge path K2 is welded.

  (4) During discharging, it is necessary to determine whether or not welding has occurred in which electric power is discharged from the vehicle 12 into the vehicle charging / discharging device 10. For this reason, the presence or absence of welding of the discharge path K2 can be reliably determined by determining the presence or absence of welding in consideration of the time when the vehicle 12 starts discharging (x seconds in the embodiment).

  (5) Further, during discharge, if the voltage on the secondary side of the discharge-side electromagnetic contactor MC2 is detected after the electrical signal for switching the discharge path K2 to the energized state is detected, the presence or absence of welding cannot be determined. . Therefore, by determining whether or not welding has occurred before the discharge path K2 is switched to the energized state (y seconds in the embodiment), it is possible to reliably determine whether or not the discharge path K2 has been welded.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. Note that, in the embodiment described below, the overlapping description of the same configuration as the already described embodiment is simplified or omitted.

  The vehicle charging / discharging device 30 of the present embodiment has a configuration for performing exclusive control and a charging-side electromagnetic contactor MC1 in addition to the configuration for performing abnormality determination such as welding determination described in the first embodiment. A configuration for discharging the residual voltage on the secondary side is provided. The exclusive control of the present embodiment is control that does not perform charging and discharging at the same time, and does not perform discharging during charging and charging during discharging.

  As shown in FIG. 6, in this embodiment, the charging-side electromagnetic contactor MC1 of the vehicle charging / discharging device 30 further includes two contacts S3 and S4 in addition to the contacts S1 and S2, and also discharge-side electromagnetic. The contactor MC2 further includes two contacts S7 and S8 in addition to the contacts S5 and S6. The contacts S3 and S4 of the charging side magnetic contactor MC1 and the contacts S7 and S8 of the discharge side magnetic contactor MC2 are b contacts (normally closed contacts). And contact S3 of charge side magnetic contactor MC1 and contact S8 of discharge side magnetic contactor MC2 are electrically connected. Specifically, one terminal of the contact S3 of the charging side electromagnetic contactor MC1 is connected to the secondary side of the charging side electromagnetic contactor MC1 via the discharge resistor 22, and the other terminal of the contact S3 is It is connected to one terminal of the contact S8 of the discharge-side electromagnetic contactor MC2. The other terminal of the contact S8 of the discharge side magnetic contactor MC2 is connected to the secondary side of the charge side electromagnetic contactor MC1. That is, both the contacts S3 and S8 constitute a closed circuit as a discharge circuit through which a secondary current of the charging-side electromagnetic contactor MC1 flows in the closed state. In the present embodiment, the contact S3 is the fifth contact, and the contact S8 is the sixth contact.

  Note that the two contacts S3 and S8 can be in opposite operating states to the contacts S1 and S2 of the charging-side electromagnetic contactor MC1 and the contacts S5 and S6 of the discharging-side electromagnetic contactor MC2. That is, when the contacts S1, S2, S5, and S6 are open, both the contacts S3 and S8 are closed, and when the contacts S1, S2, S5, and S6 are closed, both the contacts S3, S8 are open. . Therefore, both contacts S3, S8 are charged-side electromagnetic when all of the contacts S1, S2, S5, S6 are open, that is, when both the charging path K1 and the discharging path K2 are in a non-energized state. A closed circuit in which a current on the secondary side of the contactor MC1 flows is configured. Incidentally, when the contacts S1 and S2 are closed (the charging path K1 is energized), the contacts S3 and S8 do not constitute a closed circuit by the contact S3 being opened. Further, when the contacts S5 and S6 are closed (the discharge path K2 is energized), the contacts S3 and S8 do not constitute a closed circuit by the contact S8 being opened.

  The contact S4 of the charging side electromagnetic contactor MC1 has one terminal electrically connected to the discharge side controller 15 and the other terminal electrically connected to the discharge side electromagnetic contactor MC2. Further, the contact S7 of the discharge-side electromagnetic contactor MC2 has one terminal electrically connected to the charge-side controller 14 and the other terminal electrically connected to the charge-side electromagnetic contactor MC1. In the present embodiment, the contact S4 is a third contact, and the contact S7 is a fourth contact.

  The charging-side electromagnetic contactor MC1 of the present embodiment opens and closes the contacts S1 to S4 by an electrical signal output from the charging-side controller 14. More specifically, in the charging-side electromagnetic contactor MC1, when the contacts S1 and S2 are in the open state and the contacts S3 and S4 are in the closed state, the charging-side controller 14 switches the charging path K1 to the energized state. When a signal is output, each contact S1 to S4 operates in the reverse state by the input of the signal. That is, the electrical signals cause the contacts S1 and S2 to operate from the open state to the closed state, while the contacts S3 and S4 operate from the closed state to the open state. When operated in this way, the charging path K1 switches from the non-energized state to the energized state. In the present embodiment, the electrical signal for switching the charging path K1 to the energized state is the first drive signal.

  On the other hand, in the charging-side electromagnetic contactor MC1, when the contacts S1 and S2 are closed and the contacts S3 and S4 are open, the electric signal for the charging-side controller 14 to switch the charging path K1 to the non-energized state. When the signal is output, the contacts S1 to S4 operate in the opposite state by the input of the signal. That is, according to the electrical signal, the contacts S1 and S2 operate from the closed state to the open state, while the contacts S3 and S4 operate from the open state to the closed state. When operated in this way, the charging path K1 is switched from the energized state to the non-energized state.

  Further, the discharge-side electromagnetic contactor MC2 according to the present embodiment opens and closes the contacts S5 to S8 by an electrical signal output from the discharge-side controller 15. More specifically, in the discharge-side electromagnetic contactor MC2, when the contacts S5 and S6 are in the open state and the contacts S7 and S8 are in the closed state, the electricity for the discharge-side controller 15 to switch the discharge path K2 to the energized state. When a signal is output, the contacts S5 to S8 operate in the opposite state by the input of the signal. That is, according to the electrical signal, the contacts S5 and S6 operate from the open state to the closed state, while the contacts S7 and S8 operate from the closed state to the open state. When operated in this way, the discharge path K2 switches from the non-energized state to the energized state. In the present embodiment, the electrical signal for switching the discharge path K2 to the energized state is the second drive signal.

  On the other hand, in the discharge side magnetic contactor MC2, when the contacts S5 and S6 are in the closed state and the contacts S7 and S8 are in the open state, the electrical signal for the discharge side controller 15 to switch the discharge path K2 to the non-energized state. When the signal is output, the contacts S5 to S8 operate in the opposite state by the input of the signal. That is, according to the electrical signal, the contacts S5 and S6 operate from the closed state to the open state, while the contacts S7 and S8 operate from the open state to the closed state. When operated in this way, the discharge path K2 switches from the energized state to the non-energized state.

  In the present embodiment, the electrical signal from the charging controller 14 is not input directly to the charging electromagnetic contactor MC1, but is input via the contact S7 of the discharging electromagnetic contactor MC2. On the other hand, in the present embodiment, the electric signal from the discharge-side controller 15 is input via the contact S4 of the charge-side electromagnetic contactor MC1 without being directly input to the discharge-side electromagnetic contactor MC2. According to such a configuration, the electrical signal is input to the controlled object side via the non-controlled object side contact disposed on the transmission path of the electrical signal. That is, the electrical signal from the charging-side controller 14 is input to the charging-side electromagnetic contactor MC1 when the contact S7 of the discharging-side electromagnetic contactor MC2 is closed. In other words, the electrical signal from the charge-side controller 14 is charged when the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 are in the open state, that is, when the discharge path K2 is not in a non-energized state. Input to the side electromagnetic contactor MC1.

  The electrical signal from the discharge-side controller 15 is input to the discharge-side electromagnetic contactor MC2 when the contact S4 of the charge-side electromagnetic contactor MC1 is in a closed state. In other words, the electrical signal from the discharge-side controller 15 is discharged when the contacts S1 and S2 of the charging-side electromagnetic contactor MC1 are in an open state, that is, when charging is not performed so that the charging path K1 is not energized. Input to the side electromagnetic contactor MC2.

Hereinafter, the effect | action of the charging / discharging apparatus 30 for vehicles of this embodiment is demonstrated according to FIG.7 and FIG.8.
When charging and discharging are not performed, as shown in FIG. 6, the contacts S1 and S2 of the charging-side electromagnetic contactor MC1 and the contacts S5 and S6 of the discharging-side electromagnetic contactor MC2 are opened. Each of the charging path K1 and the discharging path K2 is in a non-energized state. Further, the contacts S3 and S4 of the charging-side electromagnetic contactor MC1 and the contacts S7 and S8 of the discharging-side electromagnetic contactor MC2 are closed.

  And while the connection confirmation with the vehicle 12 is performed via the charging / discharging plug P connected to the vehicle 12, and the charge start controller 14 is transmitted from the controller 16 to the charge side controller 14, the charge side controller 14 An electrical signal for switching the charging path K1 to the energized state is output. Since the contact S7 of the discharge-side electromagnetic contactor MC2 is closed, this electrical signal is input to the charge-side electromagnetic contactor MC1 via the contact S7. In the charging-side electromagnetic contactor MC1, as shown in FIG. 7, the contacts S3 and S4 are opened while the contacts S1 and S2 are closed by an electrical signal. As a result, the charging path K1 between the electric power system 11 and the vehicle 12 is energized, and electric power is supplied to the storage battery 13 of the vehicle 12 via the charge / discharge plug P to perform charging.

  As shown in FIG. 7, the discharge-side electromagnetic contactor MC2 in the case where charging is performed as described above is such that the contacts S5 and S6 are in the open state, while the contacts S7 and S8 are in the closed state. Has been. It is assumed that an electrical signal for switching the discharge path K2 to the energized state is output from the discharge-side controller 15 due to some factor such as disturbance noise during charging. However, as shown in FIG. 7, the electrical signal is not input to the discharge-side electromagnetic contactor MC2 because the contact S4 of the charge-side electromagnetic contactor MC1 is open. In other words, during charging, there is no unintentional switching to discharging. Further, at the time of charging, the welding determination of the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 is performed as in the first embodiment.

  Thereafter, when an instruction to end charging is transmitted from the controller 16 to the charging-side controller 14 with the end of charging, the charging-side controller 14 outputs an electrical signal for switching the charging path K1 to a non-energized state. Since the contact S7 of the discharge-side electromagnetic contactor MC2 is closed, this electrical signal is input to the charge-side electromagnetic contactor MC1 via the contact S7. In the charging-side electromagnetic contactor MC1, as shown in FIG. 6, the contacts S3 and S4 are closed by an electrical signal, while the contacts S1 and S2 are opened. In this state, both the contact S3 of the charging-side electromagnetic contactor MC1 and the contact S8 of the discharging-side electromagnetic contactor MC2 are closed, and a closed circuit in which a secondary current of the charging-side electromagnetic contactor MC1 flows is configured. doing. For this reason, when the charge / discharge plug P and the vehicle 12 are disconnected, the residual voltage on the secondary side of the charging-side electromagnetic contactor MC1 is discharged via the discharge resistor 22. Note that the contact S3 of the charging-side electromagnetic contactor MC1 is open when the charging path K1 is energized, so that the secondary current of the charging-side electromagnetic contactor MC1 is closed. The circuit is not configured. Therefore, the discharge resistor 22 does not become a load during charging.

Next, the case where discharge is performed will be described.
When the connection confirmation with the vehicle 12 is performed through the charge / discharge plug P connected to the vehicle 12 and a discharge start instruction is transmitted from the controller 16 to the discharge-side controller 15, the discharge-side controller 15 An electrical signal for switching the path K2 to the energized state is output. This electrical signal is input to the discharge-side electromagnetic contactor MC2 through the contact S4 because the contact S4 of the charge-side electromagnetic contactor MC1 is closed. In the discharge-side electromagnetic contactor MC2, as shown in FIG. 8, the contacts S7 and S8 are opened by the electrical signal, while the contacts S5 and S6 are closed. As a result, the discharge path K2 between the electric power system 11 and the vehicle 12 is energized, and electric power is discharged from the storage battery 13 of the vehicle 12 through the charge / discharge plug P to perform discharge.

  As shown in FIG. 8, the charging-side electromagnetic contactor MC1 when discharging is performed as described above is such that the contacts S1 and S2 are open while the contacts S3 and S4 are closed. Has been. Then, it is assumed that an electrical signal for switching the charging path K1 to the energized state is output from the charging controller 14 due to some factor such as disturbance noise during discharging. However, as shown in FIG. 8, the electrical signal is not input to the charging-side electromagnetic contactor MC1 because the contact S7 of the discharging-side electromagnetic contactor MC2 is open. In other words, the battery does not switch to charging unintentionally during discharging. Further, at the time of this discharge, similarly to the first embodiment, the welding determination of the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 is performed.

  Thereafter, when an instruction to end the discharge is transmitted from the controller 16 to the discharge-side controller 15 along with the end of the discharge, the discharge-side controller 15 outputs an electrical signal for switching the discharge path K2 to the non-energized state. This electrical signal is input to the discharge-side electromagnetic contactor MC2 through the contact S4 because the contact S4 of the charge-side electromagnetic contactor MC1 is closed. In the discharge-side electromagnetic contactor MC2, as shown in FIG. 6, the contacts S7 and S8 are closed by the electrical signal, while the contacts S3 and S4 are opened. During discharging, the contact S8 of the discharge-side electromagnetic contactor MC2 is in an open state, so that a closed circuit through which a current on the secondary side of the charging-side electromagnetic contactor MC1 flows is not configured. Therefore, the discharge resistor 22 does not become a load during discharge.

Therefore, according to this embodiment, in addition to the effects (1) to (5) of the first embodiment, the following effects can be obtained.
(6) An electric signal for switching the charging path K1 output from the charging side controller 14 to the energized state is input to the charging side electromagnetic contactor MC1 via the discharging side electromagnetic contactor MC2. If the electrical signal is not discharged, the contact S7 of the discharge-side electromagnetic contactor MC2 is closed, and is input to the charge-side electromagnetic contactor MC1. In other words, the electric signal is not input to the charging-side electromagnetic contactor MC1 because the contact S7 of the discharging-side electromagnetic contactor MC2 is in an open state during discharging. Therefore, even if the electrical signal is output from the charging-side controller 14 due to an unintended factor during discharging, the charging state and the discharging state can be reliably switched without switching from the discharging state to the charging state.

  (7) Further, an electric signal for switching the discharge path K2 output from the discharge-side controller 15 to the energized state is input to the discharge-side electromagnetic contactor MC2 via the charge-side electromagnetic contactor MC1. If the electric signal is not being charged, the contact S4 of the charging-side electromagnetic contactor MC1 is closed, and is input to the discharging-side electromagnetic contactor MC2. In other words, when the electric signal is being charged, the electric signal is not input to the discharge-side electromagnetic contactor MC2 because the contact S4 of the charge-side electromagnetic contactor MC1 is open. Therefore, even if the electrical signal is output from the discharge-side controller 15 due to an unintended factor during charging, the charging state and the discharging state can be reliably switched without switching from the charging state to the discharging state.

  (8) And in order to implement | achieve said exclusive control, while using the multi-contact type | mold electromagnetic contactor, the vehicle charging / discharging apparatus 30 of this embodiment changes the electromagnetic of the non-control object side by switching the contact. The electric signal is input to the electromagnetic contactor on the control target side via the contactor. Therefore, the above exclusive control can be realized with a simple configuration.

  (9) The discharge circuit for discharging the residual voltage on the secondary side of the charging side electromagnetic contactor MC1 is configured by the contact point S3 of the charging side electromagnetic contactor MC1 and the contact point S8 of the discharging side electromagnetic contactor MC2. Thereby, when the charging / discharging plug P is brought into a disconnected state after the charging is completed, the residual voltage in the charging path K1 can be discharged by the discharging circuit.

  (10) Further, the contact S3 is in an open state during charging, and the contact S8 is in an open state during discharging, so that the discharging circuit is in a non-energized state. For this reason, the discharge resistor 22 disposed in the discharge circuit does not become a load during charging or discharging. Therefore, charging and discharging can be performed reliably.

  (11) By realizing the exclusive control described above, the charge state and the discharge state can be switched reliably using the single charge / discharge plug P. That is, charging / discharging can be performed without separately providing charging and discharging plugs.

Each embodiment may be changed as follows.
-In each embodiment, the charging / discharging detection part which detects the voltage of the primary side of discharge side magnetic contactor MC2 is arrange | positioned, and the immobility determination of contact S5, S6 is performed from the detection result of the charging / discharging detection part. Also good. In other words, it can be determined that the charge / discharge detection unit 21 does not move even when an electric signal for energizing the discharge path K2 is output but the charge / discharge detection unit 21 does not detect a voltage. Similarly, a charge / discharge detection unit that detects the voltage on the primary side of the charging-side electromagnetic contactor MC1 may be provided, and the immobility determination of the contacts S1, S2 may be performed based on the detection result of the charge / discharge detection unit. That is, it is possible to determine that the charging / discharging detection unit 19 is immovable when the charging / discharging detection unit 19 does not detect the voltage in spite of outputting the electric signal for energizing the charging path K1.

  -In each embodiment, the charging / discharging detection part which detects the voltage of the primary side of discharge side magnetic contactor MC2 is arrange | positioned, and the welding determination of contact S5, S6 is performed from the detection result of the charging / discharging detection part. Also good. That is, the welding determination may be performed at a timing when the voltage on the primary side of the discharge-side electromagnetic contactor MC2 is detected and the electrical signal for energizing the discharge path K2 is not output.

  In each embodiment, the charge-side controller 14 and the discharge-side controller 15 may be a single controller, and the controller may control the charge-side electromagnetic contactor MC1 and the discharge-side electromagnetic contactor MC2. Moreover, you may perform abnormality determination, such as welding, with the controller.

  -In each embodiment, you may comprise each charge / discharge detection part 19-21 as a function of the charge side controller 14 or the discharge side controller 15. FIG. That is, the detection performed by each of the charge / discharge detection units 19 to 21 may be performed by the charge controller 14 or the discharge controller 15.

  In each embodiment, when the vehicle charging / discharging devices 10 and 30 are installed in, for example, a house, the power discharge destination is replaced with the power system 11 and the storage battery installed in the house is used, and the storage battery of the vehicle 12 is used as the storage battery. The power released from 13 may be charged.

  -In each embodiment, when an abnormality is determined, error notification may be performed. For error notification, an error message may be displayed on a display device provided in the vehicle charging / discharging device 10 or 30, or an error sound may be output together with the error message. The controller 16 performs error notification control.

  -In 2nd Embodiment, when comprising the charging / discharging apparatus for vehicles carrying the function of the misconnection which does not discharge during charge and is not charged during discharge, ie, the residual of the secondary side of charge side electromagnetic contactor MC1 If the function of discharging the voltage is not installed, the discharge resistor 22 may not be provided. In this case, the contact S3 of the charging-side electromagnetic contactor MC1 and the contact S8 of the discharging-side electromagnetic contactor MC2 that constitute a closed circuit for discharging the residual resistance need not be provided. That is, the charging-side electromagnetic contactor MC1 is composed of three contacts S1, S2, and S4, and the discharge-side electromagnetic contactor MC2 is composed of three contacts S5, S6, and S7. In addition, for the exclusive control as described above, the charging-side electromagnetic contactor MC1 and the discharging-side electromagnetic contactor MC2 are each configured by three contacts, and by using another means for the function of discharging the residual voltage, You may comprise the charging / discharging apparatus for vehicles provided with the exclusive control and the discharge function.

In each embodiment, the welding determination of the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 may be performed only during charging.
In each embodiment, the welding determination of the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 may be performed only at the time of discharging.

  A welding determination function for the contacts S5 and S6 of the discharge-side electromagnetic contactor MC2 at the time of discharge described in each embodiment may be mounted on the vehicle discharge device that discharges from the storage battery 13 of the vehicle 12. This configuration can be an effective function as a welding determination at the time of discharging, particularly in an apparatus in which a charging plug and a discharging plug are separately provided. That is, the welding determination at the time of discharging described in each embodiment can be applied to an apparatus that can perform charging and discharging, and can also be applied to an apparatus that can perform only discharging.

Next, a technical idea that can be grasped from the above embodiment and another example will be added below.
(A) The charging time switching means further includes a third contact that can take a state opposite to the first contact, and the discharging time switching means is in a state opposite to the second contact. The first drive signal is input to the charging time switching means via the fourth contact of the discharging time switching means, while the second driving signal is input to the charging time switching means. The vehicle charging / discharging device according to claim 3, wherein the charging time switching means is input to the discharging time switching means via the third contact of the charging time switching means.

  (B) The charging time switching means further includes a fifth contact that can be in the same state as the third contact, and the discharging time switching means is a second that can be in the same state as the fourth contact. 6. The technical idea according to claim 5, further comprising a discharge circuit configured to discharge a residual resistance of the charging path by the fifth contact, the sixth contact, and a discharge resistor. The charging / discharging apparatus for vehicles as described in a).

  (C) In charging / discharging device for a vehicle that connects a charging / discharging plug to a vehicle and charges a storage battery mounted on the vehicle or discharges from the storage battery, the charging path is switched to an energized state during charging. A discharge time switching means for switching the discharge path to the energized state at the time of discharging, and a first drive signal for switching the charge path to the energized state at the time of charging. Sometimes, a switching control means for outputting a driving signal for switching the discharge path to the energized state to the discharging time switching means, and an output side of the discharging time switching means in a state where the driving signal is not output at the time of discharging. And an abnormality determining means for determining that an abnormality occurs when the voltage of the vehicle is detected.

  (D) The abnormality determining unit determines that an abnormality is detected even when a voltage on the output side of the discharging switching unit is detected in a state where the second drive signal is not output during charging. The vehicle charge / discharge device according to the technical idea (c).

  (E) In a vehicle discharge device that discharges from a storage battery mounted on a vehicle, a discharge switching means for switching a discharge path to an energized state at the time of discharge, and a second for switching the discharge path to an energized state at the time of discharge When the voltage on the output side of the discharge time switching means is detected in a state where the second drive signal is not output at the time of discharge. And an abnormality determination means for determining the vehicle discharge device.

  DESCRIPTION OF SYMBOLS 10, 30 ... Vehicle charging / discharging apparatus, 12 ... Vehicle, 13 ... Storage battery, 14 ... Charge side controller, 15 ... Discharge side controller, MC1 ... Charge side electromagnetic contactor, MC2 ... Discharge side electromagnetic contactor, K1 ... For charge Path, K2 ... discharge path, P ... charge / discharge plug, S1-S8 ... contact.

Claims (3)

In a charging / discharging device for a vehicle that connects a charging / discharging plug to a vehicle, charges a storage battery mounted on the vehicle, or discharges from the storage battery,
A charging time switching means for switching the charging path to an energized state during charging;
A discharging switching means for switching the discharging path to an energized state during discharging;
When charging, a first drive signal for switching the charging path to the energized state is output to the charging time switching means, and at the time of discharging, a second drive signal for switching the discharge path to the energized state is discharged. Switching control means for outputting to the time switching means;
During charging, the first drive signal is output, the charging path is energized, and the second drive signal is not output, and the voltage on the output side of the discharging switching means is detected. A vehicle charge / discharge device comprising: an abnormality determination unit that determines abnormality in some cases.   2. The vehicle according to claim 1, wherein the abnormality determination unit determines that an abnormality is detected when a voltage on an output side of the discharge switching unit is detected in a state where the second drive signal is not output during discharge. Charging / discharging device. The charging time switching means includes a first contact for switching the charging path between an energized state and a non-energized state,
The discharge time switching means includes a second contact for switching the discharge path between an energized state and a non-energized state,
The charging / discharging device for a vehicle according to claim 1, wherein the abnormality determination unit determines whether or not the second contact is welded as abnormality determination.