JP5693776B2 - Charge / discharge device - Google Patents

Description

  The present invention relates to a charge / discharge device.

  In recent years, a V2H (Vehicle to Home) system has been expected as one of solutions for severe electric power situations. A V2H system refers to a system that uses battery power of an electric vehicle as in-house power. According to the V2H system, even when the supply of power is stopped, the user can supply residential power.

  In the V2H system, a method of charging / discharging using a quick charge port of a vehicle has been studied. However, charging / discharging from a quick charge port needs to be performed in accordance with standards and guidelines. The connector has a specification for detecting that the connector is connected when the connector lock is detected. Further, according to the charging / discharging sequence, communication is performed between the vehicle and the charger, and vehicle information can be obtained by the charger.

  Until now, when charging at the quick charging port of a vehicle, it is common to start charging immediately after connecting a charger that can be charged quickly, the connection confirmation is detected on the vehicle side, vehicle information Had been acquired with a charger during charging. That is, connection confirmation is not performed on the charger side, and vehicle information acquisition starts after charging is started.

  In the above-described V2H system, it is also desired that vehicle information is acquired by detecting connection of a connector during standby (before starting) of charging / discharging, and means for detecting connection between a charger and a connector, or acquired vehicle Development of means for transmitting information to a user and performing optimum control based on the vehicle information is in progress. For example, in Patent Document 1, when an electric vehicle battery is charged with electric power, an indoor controller calculates a travelable distance, a charging completion rate, a battery replacement time, and the like based on charging history data from an in-vehicle controller. In addition, a technique for monitoring and reporting an abnormality during charging is disclosed.

JP 9-233720 A

  However, in the above conventional technique, the connector connection detection means is provided in the vehicle-mounted controller on the vehicle side, so that the connection state between the vehicle and the charger cannot be grasped on the charger side. In the above prior art, if connector connection detecting means is provided on the charger side in order to grasp the connection state between the vehicle and the charger on the charger side, the CAN communication is performed after the relay is turned on in order to detect connector connection. There is a problem that the relay is deteriorated due to the frequency of turning on and power consumption increases.

  The present invention has been made in view of the above, and it is possible to grasp the connection between the vehicle and the charger on the charger side without turning on the relay and performing communication between the vehicle and the charger. It aims at obtaining a discharge device.

In order to solve the above-described problems and achieve the object, the present invention is a charging / discharging device including a charging / discharging device that exchanges power with a storage battery of an electric vehicle, and starts communication with the electric vehicle. Relay, a connector connected to a plug provided in the electric vehicle, a cable connecting the connector and the charger / discharger, and a connection detection photocoupler, wherein the connector is connected to the plug A connection detector for detecting that the cable includes a vehicle power supply of the electric vehicle when the connector is connected to the plug, and a connector connection confirmation line connected to the connection detector, connection detector, when the connector is connected to the plug, is connected to the vehicle-side connection detector with said electric vehicle via the connector connection confirmation line, wherein When the connector is connected to the plug, the connection detector is connected to the plug by connecting the connector connection confirmation line with the vehicle power supply and driving the connection detection photocoupler. It is the charging / discharging device to detect .

  According to the present invention, it is possible to obtain a charging / discharging device capable of grasping the connection between the vehicle and the charger on the charger side without turning on the relay and performing communication between the vehicle and the charger. There is an effect that the life of the relay can be extended while suppressing the power consumption.

FIG. 1 is a diagram illustrating a configuration in which an electric vehicle is connected to the charge / discharge device according to the first embodiment. FIG. 2 is a flowchart of the conventional charging / discharging device according to Embodiment 1 during simple charging. FIG. 3A is a diagram illustrating a configuration of an interface according to Embodiment 1 in which an electric vehicle is connected to the conventional charge / discharge device. 3-2 is a diagram illustrating a configuration of an interface in which an electric vehicle is connected to the charge / discharge device according to Embodiment 1. FIG. FIG. 4 is a diagram illustrating a connection detector included in the charge / discharge device according to Embodiment 1. FIG. 5 is a diagram illustrating a configuration in which an electric vehicle and a home controller are connected to the charge / discharge device according to the second embodiment. FIG. 6 is a diagram illustrating a connection detector provided in the charge / discharge device according to the second embodiment. FIG. 7 is a conceptual diagram showing the entire system including the charge / discharge device according to the second embodiment. FIG. 8 is a diagram illustrating a display example of the home monitor of the system including the charge / discharge device according to the second embodiment.

  Embodiments of a charge / discharge device according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of a first embodiment in which an electric vehicle is connected to a charge / discharge device according to the present invention.

  The charging / discharging device shown in FIG. 1 includes a charger / discharger 2, a connector 3, and a cable 4, and the electric vehicle 1 and the charger / discharger 2 are connected via the connector 3 and the cable 4.

  The electric vehicle 1 includes a vehicle controller 11, a connection detector 12, and a charge / discharge plug 13. The vehicle controller 11 controls driving and charging / discharging of the electric vehicle 1.

  The charger / discharger 2 includes a charge / discharge controller 21, a d1 relay 22, and a connection detector 23. The charge / discharge controller 21 controls charge / discharge of the electric vehicle 1. In order to charge / discharge the electric vehicle 1, the charger / discharger 2 performs CAN communication with the vehicle controller 11 of the electric vehicle 1 and performs digital input / output through the signal line in the cable 4, thereby The charge / discharge sequence of the automobile 1 can be managed.

  The cable 4 includes at least a communication line 41, a signal line (first charging start / stop line 42 and connector connection confirmation line 43), and a power line (not shown in FIG. 1). The cable 4 is connected to the charge / discharge plug 13 of the electric vehicle 1.

  FIG. 2 is a flowchart of the conventional charging / discharging device during simple charging. FIG. 3A is a diagram illustrating a configuration of an interface in which an electric vehicle is connected to a conventional charge / discharge device.

  In the configuration of the interface shown in FIG. 3A, the connection detector 12, the vehicle contactor 14, the contactor drive relay 15, the d1 relay detector 16, the d2 relay detector 17, and the charge / discharge permission prohibition output unit 18 are provided on the electric vehicle 1 side. And a vehicle-mounted battery 19 are disposed, and a d1 relay 22, a d2 relay 24, and a charge permission prohibition input unit 25 are disposed on the charger / discharger 2 side. Further, between the electric vehicle 1 and the charger / discharger 2, the first charging start / stop line 40a, the second charging start / stop line 40b, the connector connection confirmation line 40c, the charge permission prohibition line 40d, the ground line 40e, the first Are connected by a CAN communication line 40f and a second CAN communication line 40g. The first charge start / stop line 40a corresponds to the first charge start / stop line 42 in FIG. 1, the connector connection confirmation line 40c corresponds to the connector connection confirmation line 43 in FIG. 1, and the first CAN. The communication line 40f and the second CAN communication line 40g correspond to the communication line 41 in FIG. The first charging start / stop line 40a and the second charging start / stop line 40b connected to the vehicle contactor 14 correspond to power lines.

  Here, the charge preparation work of the conventional charging / discharging device will be described with reference to FIGS. 2 and 3-1. First, when the d1 relay 22 on the charger / discharger 2 side is turned on (S10), the photocoupler f16 on the electric vehicle 1 side is driven, and the electric vehicle 1 detects the on of the d1 relay 22.

  When the electric vehicle 1 detects that the d1 relay 22 is turned on, the electric vehicle 1 transmits a signal via the first CAN communication line 40f and the second CAN communication line 40g in order to start CAN communication with the charger / discharger 2. (S11).

  When the charger / discharger 2 receives the CAN communication signal from the electric vehicle 1, the charger / discharger 2 transmits the CAN communication signal to the electric vehicle 1. After mutual CAN communication is established in this way, the charger / discharger 2 receives a charge permission signal from the electric vehicle 1 via the charge permission prohibition line 40d, and locks the connector with an electromagnetic lock (S12).

  Then, the charger / discharger 2 applies a voltage to the outlet circuit for a short time, and performs an insulation diagnosis to check whether there is an abnormality such as a short circuit or a ground fault in the outlet circuit including the connector interface (S13).

  After the insulation diagnosis, the charger / discharger 2 turns on the d2 relay 24 and informs the electric vehicle 1 via the wiring of the second charging start / stop line 40b that the preparation of the charger / discharger 2 is completed (S14), Finish charging preparation work.

  In the charge preparation work of FIG. 2 described above, in order for the charger / discharger 2 to obtain vehicle information of the electric vehicle 1, the d1 relay 22 must be turned on to start CAN communication. However, since the charger / discharger 2 grasps the connection state with the electric vehicle 1 by CAN communication from the electric vehicle 1, the d1 relay tries to start CAN communication even when the electric vehicle 1 is not connected. 22 is turned on. Therefore, there was a problem that turning on the relay unnecessarily deteriorates the relay and increases power consumption.

  3-2 is a figure which shows the structure of the interface of the form with which the electric vehicle was connected to the charging / discharging apparatus which concerns on this invention. Unlike the conventional charge / discharge device, the charge / discharge device shown in FIG. 3-2 includes a connection detector 23.

  In the conventional charging / discharging device shown in FIG. 3A, when the electric vehicle 1 and the charger / discharger 2 are connected by the connector 3 by the connector connection confirmation line 40c, the FG of the in-vehicle battery 12V of the electric vehicle 1 and the charger. The 12V FG becomes common, and the connector detection detecting photocoupler h included in the connection detector 12 on the electric vehicle 1 side is driven so that the connection can be detected by the electric vehicle 1. However, the charger / discharger 2 cannot detect the connection.

  Since the charging / discharging device according to the present invention shown in FIG. 3-2 includes the connection detector 23, the connection of the connector can be detected also in the charging / discharging device 2.

  FIG. 4 is a diagram showing the connection detector 23 provided in the charging / discharging device according to the present invention. The connection detector 23 includes a connector connection detection photocoupler 231 and a current limiting resistor 232. The connector connection detection photocoupler 231 is arranged on the side of the charger / discharger 2 of the connector connection confirmation line 40c, similarly to the connector connection confirmation photocoupler h included in the connection detector 12 of the electric vehicle 1. When the electric vehicle 1 and the charger / discharger 2 are connected, the connector connection detection photocoupler 231 on the charger / discharger 2 side simultaneously with the driving of the connector connection confirmation photocoupler h included in the connection detector 12 on the electric vehicle 1 side. Drive and can detect the connection. Since the photocoupler is used in this way, the input and output of the connection detector 23 are insulated, and an excessive voltage can be prevented from being applied to the charge / discharge controller 21.

  As described above, the connection can be detected on the charger / discharger 2 side without performing CAN communication only by adding the connection detector 23 having a simple configuration to the conventional configuration.

  In the charging / discharging device according to the present invention, since the connector connection can be detected by the charger / discharger 2 without performing CAN communication, the number of times the relay is opened and closed is suppressed, and the life of the relay can be extended. Further, since it is possible to prevent starting CAN communication in order to obtain vehicle information even when the connector is not connected, power consumption can be suppressed.

  Further, the charging / discharging device of the present invention only adds the connection detector 23 (connector connection detection photocoupler 231 and current limiting resistor 232) to the charger / discharger 2 side, thereby reducing the cost. Is possible.

  In addition, since the charging / discharging device of the present invention determines whether or not the connector 3 is connected by binary, reliable detection in a short time is possible, and the operability and safety of the system can be increased. Is possible.

  In the charging / discharging device of the present invention, since CAN communication is not used for detection of connection, it is possible to determine whether the connection is abnormal or communication is abnormal, and the reliability of the system can be increased. .

  In addition, although the charging / discharging apparatus of this invention needs to always acquire the vehicle information of the electric vehicle 1 at the time of charging / discharging, it is not necessary to always acquire information, such as a battery capacity of the electric vehicle 1, at the time of standby. Therefore, the consumption of the low-voltage battery can be suppressed by stopping the communication operation during a period when it is not necessary to acquire information such as the battery capacity of the electric vehicle 1.

  Note that the timing for acquiring the vehicle information of the electric vehicle 1 may be, for example, after a predetermined time has elapsed since the start of connector connection or the previous vehicle information acquisition (before the amount of power in the battery is depleted). . The “predetermined time” is preferably set so that the power consumption during standby is 1% or more of the total battery capacity of the vehicle battery of the electric vehicle 1. Further, the “predetermined time” may be set in consideration of operating the in-vehicle device by starting the power source of the vehicle system in a stopped state when charging the low voltage battery from the vehicle battery.

  Alternatively, the amount of reduction per unit time is calculated from the remaining capacity of the battery at the start of connector connection and after a predetermined time has elapsed (for example, after one hour has elapsed) to estimate the power consumption during standby, and the next vehicle information The acquisition timing may be determined. That is, communication may be performed at a fixed time interval based on the power consumption during standby. If it does in this way, since vehicle information can be acquired at a suitable timing, vehicle information can be acquired when needed, suppressing power consumption.

Embodiment 2. FIG.
FIG. 5 is a diagram showing a configuration in which the electric vehicle 1 and the home controller 5 are connected to the charge / discharge device according to the present invention.

  The charging / discharging device according to the present embodiment shown in FIG. 5 includes a home controller 5 that controls the charger / discharger 2 and a home monitor 6 that monitors the charger / discharger 2, and includes a connection detector 23a. The point that the output is input to the home controller 5 is different from the charge / discharge device according to the first embodiment.

  The in-home controller 5 displays information on the in-home monitor 6 based on the vehicle information acquired from the charger / discharger 2, and manages and controls the exchange of power.

  FIG. 6 is a diagram showing a connection detector 23a included in the charging / discharging device according to the present invention. The connection detector 23a shown in FIG. 6 includes a connector connection detection photocoupler 231a on the charger / discharger 2 side of the connector connection confirmation line 40c, and the secondary side of the connector connection detection photocoupler 231a is used as a power source for the home controller 5. After connecting, a connector connection confirmation signal is input to the controller 51 of the home controller 5 (see FIG. 5).

  According to the present embodiment, the in-home controller 5 is insulated from the electric vehicle 1 and the charger / discharger 2, safety is increased, and the in-home controller 5 can be made less susceptible to noise, thereby improving reliability. It becomes possible.

  In addition, according to the present embodiment, since the connection status can be directly confirmed by the home controller 5, the charger / discharger 2 is stopped when the power source of the charger / discharger 2 is unnecessary (during standby or the like). If this is done, power consumption can be reduced.

  FIG. 7 is a conceptual diagram showing the entire system including the charge / discharge device according to the second embodiment. The home controller 5 receives the vehicle information of the electric vehicle 1 via the charger / discharger 2. The home controller 5 displays the received vehicle information of the electric vehicle 1 on the home monitor 6. Moreover, the user can operate the charger / discharger 2 from home.

  FIG. 8 is a diagram illustrating a display example of the home monitor 6 of the system including the charging / discharging device according to the second embodiment. The home monitor 6 displays the presence / absence of connection with the electric vehicle 1, the remaining battery level (charge amount), the vehicle type of the electric vehicle 1, detected abnormality information, and the like to notify the user.

  According to the configuration of the present embodiment, the connection state can be confirmed at home, so that it is possible to suppress forgetting to connect.

  According to the configuration of the present embodiment, since the user can check the vehicle information of the electric vehicle 1 at home, the remaining battery level, which vehicle is connected when a plurality of vehicles are owned, etc. Can be easily grasped.

  Further, when the connector is connected, the user 3 is set using the home monitor 6 (always or only at night when the connector is connected, when the button is pressed, etc.) and the connector is locked from the charger / discharger 2. It is possible to prevent theft of the vehicle by fixing the connection with the electric vehicle 1 disabled and fixing the drive mode of the electric vehicle 1 to parking.

  The connection detector 23a is not limited to the configuration of the present embodiment, and the home controller 5 and the home monitor 6 may be mounted in the same housing.

  In addition, this embodiment can be applied to HEMS (Home Energy Management System) and the like, and more effective control can be performed by applying this embodiment to HEMS and the like.

  In the first and second embodiments, the mode in which the electric vehicle is connected to the charger is described, but the present invention is not limited to this. In the present invention, the electric vehicle may be replaced with a storage battery, that is, the present invention may be applied to a storage battery. When the present invention is applied to a storage battery, it is possible to detect an unexpected plug disconnection in a house, and it is possible to improve reliability and safety.

  As described above, the charging / discharging device according to the present invention is useful for a storage battery or an electric vehicle equipped with a storage battery, and particularly useful for a V2H system.

  1 electric vehicle, 2 charger / discharger, 3 connector, 4 cable, 5 home controller, 6 home monitor, 11 vehicle controller, 12 connection detector, 13 charge / discharge plug, 14 vehicle contactor, 15 contactor drive relay, 16 d1 Relay detector, 17 d2 relay detector, 18 charge / discharge permission prohibition output unit, 19 vehicle-mounted battery, 21 charge / discharge controller, 22 d1 relay, 23, 23a connection detector, 24 d2 relay, 25 charge permission prohibition input unit, 231, 231a Connector connection detection photocoupler, 232, 232a Current limiting resistor, 40a First charge start / stop line, 40b Second charge start / stop line, 40c Connector connection confirmation line, 40d Charge permission prohibition line, 40e Ground 40f first CAN communication line, 40g second CAN communication line, 41 communication , 42 first charging start stop line, 43 connector connection confirmation line, 51 controller, S10～14 step.

Claims (3)

It is a charging / discharging device comprising a charging / discharging device that exchanges power with a storage battery of an electric vehicle,
A relay for starting communication with the electric vehicle;
A connector connected to a plug provided in the electric vehicle;
A cable connecting the connector and the charger / discharger;
A connection detector that includes a connection detection photocoupler and detects that the connector is connected to the plug;
The cable includes a connector connection confirmation line that connects to a vehicle power source and the connection detector of the electric vehicle when the connector is connected to the plug ,
The connection detector is connected to a vehicle-side connection detector of the electric vehicle via the connector connection confirmation line when the connector is connected to the plug .
When the connector is connected to the plug, the connection detector is connected to the plug by connecting the connector connection confirmation line with the vehicle power supply and driving the connection detection photocoupler. Charge / discharge device to detect . The connection detector, the charge and discharge device of claim 1 comprising a current limiting resistor. The connection detector, the charge and discharge device according to claim 1 or claim 2, operated by electric power of the power supply provided in the charging and discharging unit.

Images