JPH062946U - Charging connector for separate charger - Google Patents

Abstract

(57) [Abstract] [Purpose] In a separate type charger that charges a running battery for propulsion of an electric vehicle, the battery is connected to the running battery by a charging connector and then the charger is operated to charge the battery. Since the current supplied is a high DC voltage, if the charging connector is removed while the charger is working, an electric arc will be generated between the terminals, but such an electric arc will occur before the charging connector is completely disconnected. Providing a charging connector that allows blocking. [Composition] In addition to the charging current contacts 4 and 6, disconnection detection signal contacts 5 and 7 are provided, and the disconnection detection signal contacts 5 and 7 are made shorter than the charging current contacts 4 and 6, When disconnecting the charging connector 1, the disconnection detection signal contacts 5 and 7 are disconnected first before the charger 9
It can be detected on the side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a charging connector used when electrically connecting a separately mounted charger and a battery for running an electric vehicle.

[0002]

[Prior art]

 The separate-type charger takes, for example, a 200V single-phase or three-phase AC power source, rectifies it and converts it into a 240V DC power source, and converts it into a battery for running an electric vehicle through an appropriate charging connector. It is a charger that supplies electricity and is installed in a specific place apart from the vehicle.

The charging connector has a structure such that it is connected when charging and detached when charging is completed.

[0004]

[Problems to be solved by the device]

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

By the way, when the charging connector is detached during the operation of the charger, an electric arc is generated between the charger side of the charging connector and the traveling battery side terminal. This is because the voltage supplied to the battery for driving is a high voltage of, for example, 240 V DC, and at such a high voltage, even if the charging connector is removed and the distance between the terminals is about 30 mm, the electric The arc does not disappear and continues to occur continuously. Since such an electric arc is generated from the terminal portion of the charging operator while the charging connector is grasping and disconnecting the charging connector, there is a risk of electric shock and burns.

The present invention has been made in view of the above circumstances, and is suitable for being configured so that an electric arc is not generated from the terminal portion of the charging connector even when the charging connector is detached and attached while the charger is in operation. An object is to provide a charging connector for a separate type charger.

[0007]

[Means for Solving the Problems]

 For the above object, according to the present invention, in a charging connector that electrically connects a separate type charger and a battery for running, at least two male contacts for DC charging current and two for disconnection detection signal are provided. A plug having two male contacts, a receptacle having at least two female contacts that fit with the male contacts for the charging current, and a receptacle having two female contacts that fit with the male contacts for the disconnection detection signal. Provided is a charging connector for a separate type charger, wherein a sliding stroke of a male contact and a female contact for a wire breakage detection signal is shorter than a sliding stroke of the male current contact and a female contact for charging current. .

[0008]

[Action]

 According to the above means, when the disconnection detection signal male contact and the female contact sliding stroke when disconnecting the charging connector is shorter than that of the charging current contact, when the charging connector is to be disconnected, Since the electrical connection of the contact for disconnection detection signal is released first, the remote charger detects the disconnection and stops the operation of the charger until the contact for charging current is disconnected. It will be possible.

[0009]

【Example】

 FIG. 1 is a schematic view showing an embodiment of a charging connector according to the present invention together with a separate charger and a battery for running. In FIG. 1, the charging connector 1 is composed of a plug 2 and a receptacle 3, and the plug 2 has a pair of male contacts 4 for charging current and a pair of male contacts 5 for disconnection detection signal. is doing. On the other hand, the receptacle 3 has female contacts 6 and 7 which are respectively fitted to the male contacts 4 and 5 of the plug 2 and can establish an electrical connection. The male contacts 4 and 5 of the plug 2 have the same length, but the female contact 7 for the disconnection detection signal is shorter in the receptacle 3 than the female contact 6 for the charging current. Are using. Therefore, regarding the stroke in which the contacts slide when the charging connector 1 is disconnected from the connected state, the combination of the male contact 4 for the charging current and the female contact 5 for the disconnection detection signal is more preferable. It is longer than the combination of the female contacts 8, so that when disconnecting the charging connector 1, the contact for the disconnection detection signal is disconnected earlier than that for the charging current. The female contacts 7 for the disconnection detection signal in the receptacle 3 are electrically connected to each other by a short-circuit wire 8.

The male contact 4 for charging current of the plug 2 of the charging connector 1 is connected to the charging output of the charging circuit 10 of the charger 9, and the male contact 5 for disconnection detection signal has one of them connected to, for example, the direct current of the charging circuit 10. It is connected to an internal power supply of 24V, and the other is connected to one terminal of the exciting coil of the relay 11 for charge control. The other terminal of the exciting coil is grounded via the relay contact and the charge stop switch 12 and also grounded via the charge start switch 13. Another relay contact is connected between the charge control terminal 14 of the charging circuit 10 and ground. The charging circuit 10 is connected as a power source to, for example, a three-phase 200 V AC power source facility. The female contact 6 for charging current of the receptacle 3 is connected to the running battery 15.

When the traveling battery is charged by the separate charger 9, the charging connector 1 is connected and the charging start switch 13 is pressed. Then, the relay 11 is supplied with power from the charging circuit 10 via the contacts 5 and 7 of the charging connector 1 and the short-circuit wire 8, and is excited, and the relay contacts are closed. As a result, the charging control terminal 14 is grounded via the relay contact, and the charging circuit 10 starts the charging action. At this time, the relay contact connected to the ground side of the exciting coil is also closed, so even if the charging start switch 14 is stopped from being pressed and the contact is opened, the relay 11 is kept in the self-holding state where the excitation is continued. Yes, the charging action of the charging circuit 10 is continued. When charging is stopped midway, the charging stop switch 12 is pressed to open the relay circuit to demagnetize the relay 11. As a result, the relay contact is opened, the charge control terminal 14 is opened, and the charging operation of the charging circuit 10 is stopped. At this time, the self-holding state of the relay 11 is released.

Here, a case will be described in which the charging connector 1 is to be detached when the charger 9 is in the charging operation by pressing the charging start switch 13. When attempting to remove the charging connector 1, due to the difference in length between the female contact 6 for charging current of the receptacle 3 and the female contact 7 for disconnection detection signal, the disconnection detection signal is used more than the contacts 4 and 6 for charging current. The contacts 5 and 7 are disconnected first. As a result, the relay circuit is opened to the same state as when the charge stop switch 12 is pressed, and the charging operation of the charging circuit 10 is stopped before the contact for the charging current is disconnected. As a result, when the charging connector 1 is detached, no electric arc is generated between the contacts.

FIG. 2 is an explanatory view schematically showing another embodiment of the charging connector according to the present invention. According to this embodiment, the length of the disconnection detection signal male contact 5 of the plug 2 is charged. An example is shown in which it is made shorter than the diverted male contact 4.

[0014]

[Effect of device]

 According to the present invention, the contact for the disconnection detection signal is made shorter than the contact for the charging current, so that even if the charging connector is removed during charging operation of the charger, the contact for the disconnecting current comes before the contact for charging current. The disconnection detection signal contact is disconnected at this time, and it becomes possible for the charger side to detect this and stop the charging action, and when the charging connector is removed, the electrical connection between the terminals will be lost. No arcing will occur and the charging operator will be relieved of the risk of electric shock or burns.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a charging connector of a separate type charger according to the present invention.

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

[Explanation of symbols]

 1 Charging Connector 2 Plug 3 Receptacle 4 Male Contact for Charging Current 5 Male Contact for Disconnection Detection Signal 6 Female Contact for Charging Current 7 Female Contact for Disconnection Detection Signal 8 Short-Circuit Line 9 Separate Battery Charger 15 Running Battery

 ─────────────────────────────────────────────────── ─── 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 charging connector for electrically connecting a separately-installed charger and a running battery, comprising a plug having at least two male contacts for direct current charging current and two male contacts for disconnection detection signal. A receptacle having at least two female contacts that fit with the male contacts for the charging current and two female contacts that fit with the male contacts for the disconnection detection signal. A charging connector of a separate type charger, wherein a sliding stroke of the female contact and a sliding stroke of the female current contact and the female contact for charging current are shorter.