JPH062944U - Separate type charger - Google Patents

Abstract

(57) [Abstract] [Purpose] In a separate type charger that charges a running battery for propulsion of an electric vehicle, a high-voltage DC current is supplied to the running battery via a charging connector, so the charger operates. When the charging connector is removed, an electric arc is generated between the terminals, but this should be suppressed to free the charging operator from the risk of electric shock and burns. A charging operation includes means (3, 5; 3; 16, 17) for detecting an operation of disconnecting the charging connector 3 and means (5; 9) for stopping the operation of the charger in response to the detection. When a person removes or tries to remove the charging connector, the charging function of the charger is stopped.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention relates to a stand-alone charger, and is particularly applicable to charging equipment for charging a running battery of an electric vehicle.

[0002]

[Prior art]

 The separate type charger uses, for example, a 200V single-phase or three-phase power source as input, rectifies it to, for example, 240V DC, and supplies this to a running battery of an electric vehicle through an appropriate charging connector. It is a charger installed in a specific place other than.

To charge the traveling battery, the traveling battery and the charger have to be electrically connected, and this connection is made by a detachable charging connector. This charging connector is connected when charging and removed when charging is complete.

[0004]

[Problems to be solved by the device]

 When the traveling battery is charged with the separate charger, first the two are electrically connected with the charging connector, and charging is started by turning on the charging start switch of the charger. When charging is completed, the charger will stop operating and the charging connector will be removed to finish charging the running battery.

By the way, when the charging connector is detached during operation of the charger, an electric arc is generated between the terminals of the charging connector on the charger side and the traveling battery side. This electric arc is continuously generated when a high voltage of direct current is supplied, and if a high voltage of direct current of 240 V, for example, is supplied to the running battery, even if the distance between the terminals is about 30 mm. It never disappears. In other words, even if the terminals of the charging connector are mechanically separated, they are not electrically disconnected, and an electric arc is continuously generated. Since such an electric arc is generated from the terminal part of the charging connector while the charging connector is being removed, there is a great risk that the charging operator may get an electric shock or get burned.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a separate-type charger in which an electric arc is not generated from a terminal portion of the charging connector even when the charging connector is detached and attached while the charger is operating. To aim.

[0007]

[Means for Solving the Problems]

 For the above object, according to the present invention, in a separate charger for charging an on-vehicle traveling battery through a charging connector, a means for detecting an operation for disconnecting the charging connector, and an operation for disconnecting the charging connector by the means. And a means for stopping the operation of the charger when it is detected that a separate charger is provided.

[0008]

[Action]

 According to the above means, when the means for detecting the operation of disconnecting the charging connector detects the operation, the means for stopping the operation of the charger is operated to stop the power supply to the charger before the charging connector is disconnected.

[0009]

【Example】

 FIG. 1 is a block diagram showing a preferred embodiment of a separate type charger according to the present invention. In FIG. 1, a separate type charger 1 has a charging circuit 2, a commercial power source of, for example, single-phase AC 200 V is connected to an input, and an output is connected to a battery 4 for running an electric vehicle through a charging connector 3. When connected, a constant current of, for example, 240 V DC and 30 A can be supplied.

The charging connector 3 has a pair of terminals for charging current as well as a pair of terminals for disconnection detection, and the traveling battery side of the disconnection detection terminal simply electrically connects them. A connected short-circuit wire is provided. One of the disconnection detection terminals on the charging circuit side of the charging connector 3 is connected to, for example, a DC 24V power line of the charging circuit, and the other is one end of an exciting coil of the relay 5 for controlling the start and stop of charging of the charging circuit 2. It is connected to the. The other end of the exciting coil is grounded via its relay contact and charging start switch 6. Another relay contact is connected to the charge control terminal 7 and the charge / stop switch 8 for starting or stopping the charging operation of the charging circuit 2.

When the traveling battery 4 is charged, the charge / stop switch 8 is turned on, and the charging connector 3 is connected to connect the charging current terminal and the disconnection detection terminal at the same time. Here, by pressing the charging start switch 6, the relay 5 is activated and the contact points thereof are closed. As a result, the relay 5 is held by itself because the circuit of its exciting coil is closed, and the charging control terminal 7 for starting or stopping the charging operation of the charging circuit 2 is grounded, so that the charging circuit 2 operates and charging is performed. Be started. When the charging is stopped, the charging / stop switch 8 is turned off to open the circuit of the charging control terminal 7 and the charging circuit 2 stops the charging operation.

Here, when the charging plug 3 is removed during charging, the circuit of the exciting coil of the relay 5 is opened, so that the relay 5 is deenergized and their contacts are opened. As a result, the self-holding of the relay 5 is released and the circuit of the charging control terminal 7 is opened, so that the charging circuit 2 stops the charging operation. Therefore, no electric arc is generated at the charging current terminal of the charging connector 3. In this example, the means for detecting the operation of disconnecting the charging connector is constituted by the disconnection detection terminal of the charging connector 3 and the relay 5, and the means for stopping the operation of the charger is connected to the charging control terminal 7 of the charging circuit 2. It will be composed of the contacts of the relay 5.

FIG. 2 shows another embodiment of the separate type charger according to the present invention. In the figure, the same parts as those shown in FIG. Omit it.

In the embodiment of FIG. 2, the disconnection detection terminal of the charging connector 3 is connected to the exciting coil of the power relay 9, and the relay contact is inserted in the power supply line for inputting the AC power supply to the charging circuit 2.

In this embodiment, the power relay 9 is deenergized in response to the disconnection of the charging connector 3, and the charging is stopped by shutting off the power supply of the charger 1. Therefore, the operation of removing the charging connector is performed. The detecting means is constituted by the disconnection detection terminal of the charging connector 3, and the means for stopping the operation of the charger is constituted by the power relay 9.

FIG. 3 is a partial cross-sectional view of a charging connector showing another embodiment of means for detecting the operation of disconnecting the charging connector. The charging connector is composed of, for example, a receptacle 11 provided on the vehicle and a plug 12 provided on the output cable of the charger. It is connected to the male contact 14. A permanent magnet 16 is provided on the latch lever 15 of the plug 12, and a magnetoresistive element 17 is provided at a position facing the permanent magnet 16. That is, the movement of the latch lever 15 which is an operation when the plug 12 is detached from the receptacle 11 is detected by the magnetoresistive element 17, and a change in the magnetic field of the permanent magnet 16 is detected by the electric resistance of the magnetoresistive element 17. It is detected by the change in resistance, and the determination is made in the charging circuit. A Hall element, a magnetic diode, a magnetic transistor, or the like can be used as the magnetoresistive element 17.

As a means for detecting the operation of detaching the charging connector, a micro switch for mechanically detecting the movement of the latch lever 15 shown in FIG. 3, a reed switch for detecting a change in the magnetic field, or a charging connector It is possible to use an infrared sensor or a capacitance sensor that detects approach, or a photocoupler that blocks the optical path in conjunction with the removal operation.

[0018]

[Effect of device]

 According to the present invention, by providing means for stopping the operation of the charger at the same time as or before the removal of the charging connector, the charging action is immediately stopped even if the charging connector is removed during charging, and the charging operation is completed. The occurrence of an electric arc between the terminals of the connector is eliminated and the charging operator is relieved of the risk of electric shock or burns.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a separate type charger according to the present invention.

FIG. 2 is a schematic view showing another embodiment of the separate type charger according to the present invention.

FIG. 3 is a partial cross-sectional view of a charging connector showing an embodiment of a main part of a separate type charger according to the present invention.

[Explanation of symbols]

 1 Charger 2 Charging Circuit 3 Charging Connector 4 Running Battery 5 Relay 6 Charging Start Switch 7 Charging Control Terminal 8 Charging Stop Switch 9 Power Relay 16 Permanent Magnet 17 Magnetoresistive Element

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroyasu Suzuki 5-3-8, Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation (72) Inventor Kazuo Natori 2-4-1, Nishiazajigaoka, Chofu-shi, Tokyo Tokyo Electric Power Co., Ltd. Technical Research Institute (72) Inventor Noboru Fujiwara 2-4-1 Nishi Tsutsujigaoka, Chofu City, Tokyo Tokyo Electric Power Co., Inc. Technical Research Institute

Claims (1)

[Scope of utility model registration request] 1. A separate type charger for charging an on-vehicle traveling battery via a charging connector, and means for detecting an operation of disconnecting the charging connector, and charging when the operation detects an operation of disconnecting the charging connector. And a means for stopping the operation of the battery charger.