JPH07106025A - Connector for charging battery - Google Patents

Abstract

PURPOSE:To prevent failure of a charger side by setting a pair of socket contacts to be arranged on a receptacle on rear positions and by enlarging the interval between the front end of the positioning key of the receptacle and the front end part of the key groove formed on a plug when the receptacle and the plug are opposed to one another. CONSTITUTION:A connector for charging a battery comprises a receptacle 10 fixed to a car body side and a plug 11 provided on a charger side. A key groove 23 for inserting the positioning key 16 of the receptacle 10 is formed on the inner cylinder 24 of the plug 11. The socket contact 18 is mounted on the rear position in the receptacle 10, and there is enough interval between the front end of the contact 18 and the front end of a contact 26 so that both of the contacts are not brought into contact with one another, when the key 16 is abutted on the front end of the inner cylinder 24. At the time of connection, the key 16 is first inserted into the groove 23, and then the contact 26 is fitted into the socket 18. Enough amount of current at the time of rapid charging can flow in the connected surface area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charging connector for charging a battery of an electric vehicle, which can be easily connected.

[0002]

2. Description of the Related Art A battery which is a drive source of an electric vehicle is
The weight is large and the replacement work is complicated. Therefore, a battery with a low electric capacity is often charged using a charger. Therefore, in the electric vehicle, the cord extended from the charger is connected by the connector and charged. The connector is composed of a receptacle fixed to the body of the electric vehicle and a plug provided at the tip of the cord of the charger.

As an example, as shown in FIGS. 5 to 7, the charger has an AC power source as an input and is provided with a switch 1, a pilot lamp 2 and a circuit return switch 3 and is connected to a transformer 4. A rectifier 5 and a voltage detection circuit 6 are provided on the secondary side of the transformer 4, and are connected to an output terminal via a fuse 7 to provide a DC output. A pilot lamp 2, a circuit return switch 3 and the like are mounted on the surface of a frame 8 accommodating these circuit components, and cords are connected to the output terminals. Figure 5 shows the end of the code
The connector 9 (receptacle 10 and plug 11) shown in FIG.

As shown in FIGS. 8 and 9, a receptacle 10 fixed to one vehicle body side of a connector has a flange 13 formed on the outer periphery of a cylindrical body 12 and a mounting hole 14 formed therein. It is designed to be fixed. In addition, a spiral groove for connecting and fixing the plug 11 to the outer peripheral surface of the tip of the cylinder body.
15 are formed. The inside of the receptacle 10 is provided with a positioning key 16 projecting on the inner peripheral surface of the cylinder, and is further filled with an insulator 17 made of a synthetic resin inside. It is installed in the hole opened in 17. A DC charging current is received by the pair of socket contacts 18. The tips of the socket contacts 18 and the small socket contacts 19 are located slightly inside the fitting surface (front surface) 17a of the insulator 17. The tip of the positioning key 16 is a socket contact.
It is located inside the tip of 18.

On the other hand, as shown in FIGS. 10 and 11, the plug 11 is provided with a fixing cylinder 21 through which the cylindrical body 20 is inserted, and is arranged so as to be slidable in the circumferential direction. Protrusions 22 are provided. Inside the cylindrical body 20, an inner cylinder 24 having a key groove 23 having an opening at the tip and extending in the axial direction is provided. Then, the inner peripheral wall of the inner cylinder 24 and the fitting surface 25a of the filled insulator 25 form a recess, and the pin contact 26 and the small pin contact 27 are projected from the fitting surface 25a. The tips of the pin contacts 26 and the small pin contacts 27 are inner cylinders.
It is located inside the tip of 24.

Therefore, by inserting the plug 11 coming out of the charger into the receptacle 10 on the vehicle body side, the contacts 18, 26, etc. are connected and the positioning key 16 is inserted in the key groove 23.
Is inserted and the fixing cylinder 21 is tightened through the spiral groove 15,
The receptacle 10 and the plug 11 are integrally connected.
As a result, the battery can be charged by energizing the pair of contacts 18 and 26.

The outer diameter of the pin contact 26 is about 9 mm.
By doing so, a direct current of 150 A can be passed through the pair of contacts 18, 26. In addition, 31-21943
Japanese Patent Laid-Open Publication No. Hei 1-129776 discloses an automatic charging device, and Japanese Unexamined Utility Model Publication No. 1-129776 discloses a connector in which terminals in a plug are exposed.

[0008]

By the way, when the plug 11 coming out of the charger is inserted into the receptacle 10 on the vehicle body side, the tip of the socket contact 18 of the receptacle 10 slightly moves with respect to the fitting surface 17a of the insulator 17. Only at the inner side (about 1 mm), the pin contact 26 and the socket contact 18 make the first contact. For this reason, if the pair of contacts 18 and 26 are in opposite directions, a battery voltage is applied to the receptacle side, and therefore a reverse current flows when the contacts are made, and the fuse 7 of the charger is blown. Therefore, the connector shape may be formed asymmetrically to prevent contact, but there is no compatibility with conventional products and the cost increases.

It is an object of the present invention to provide a battery charging connector in which reverse contact between a pin contact and a socket contact is impossible with a simple structure change.

[0010]

In order to achieve the above object, the present invention connects a battery and a charger of an electric vehicle with a receptacle on the vehicle body side and a plug on the charger side, and a pair symmetrically arranged inside. In a battery charging connector in which the contacts are connected via a positioning key, a pair of socket contacts arranged in the receptacle are installed at the back position, and when the receptacle and the plug are opposed to each other, the socket provided in the receptacle is The gap between the tip of the socket contact and the tip of the pin contact provided in the plug is larger than the gap between the tip of the positioning key and the edge of the key groove formed in the plug.

[0011]

Since the present invention is configured as described above, when the receptacle and the plug are connected to each other, they are aligned with each other so that the pair of pin contacts and the socket are inserted after the positioning key is fitted into the key groove. The contacts come into contact. Further, at the time of non-alignment, the tip of the positioning key collides with the edge portion of the key groove, the connector cannot be connected, and the tip of the pin contact and the socket contact do not come into contact with each other.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same members as those described in the related art are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1, a connector 9 for charging a battery includes a receptacle 10 fixed to the vehicle body side,
It consists of a plug 11 provided on the charger side. A key groove 23 into which the positioning key 16 of the receptacle 10 is inserted is formed in the inner cylinder 24 of the plug 11. The receptacle 10 shown in FIGS. 2 and 3 has the socket contact 18 mounted at a recessed position, and when the positioning key 16 contacts the tip of the inner cylinder 24, the tip of the socket contact 18 and the tip of the pin contact 26. It is designed so that it will not come into contact with it with a margin in the distance. In the embodiment, the mating surface 17 of the insulator 17
Socket contact is located about 6mm deeper than a
18 tips are located.

When the connectors 9 constructed as described above are connected to each other, the positioning key 16 is inserted into the key groove 23 if they are aligned with each other.
First, and then the pair of pin contacts 26 and socket contacts 18 are fitted. In the embodiment, the length and position of the pin contact 26 of the plug 11 remain unchanged, and the socket contact 18 of the receptacle 10 has a length of about 3 mm when mated.
Plugged in, pin contact 26 and socket contact 18
The junction area of is capable of supplying a sufficient current of 150A during rapid charging. FIG. 4 shows the connected state of the connector 9.

By the way, when the plug 11 is rotated 180 degrees to be fitted into the receptacle 10, the tip of the positioning key 16 collides with the tip edge portion of the inner cylinder 24, which hinders the connection. Since the socket contact 18 of the receptacle 10 and the pin contact 26 of the plug 11 cannot contact each other, it is possible to prevent energization due to reverse connection and prevent the fuse 7 on the charger side from being blown. In addition, the battery voltage (D
Since the socket contact 18 of the receptacle 10 on which C96 to 120V) is applied is recessed, there is no possibility of touching hands or metal. Since only the receptacle 10 is improved in this way, the change cost can be kept low.

[0016]

Since the present invention is constructed as described above, it is possible to prevent the polarity of the receptacle and the plug from being reversed and prevent damage to the charger. Further, since the plug is a conventional one and only the structure of the receptacle is slightly changed, it is compatible with the conventional charger and can be improved and produced at a low cost.

[Brief description of drawings]

FIG. 1 is a side sectional view of a connector according to an embodiment of the present invention during fitting.

FIG. 2 is a side sectional view of the receptacle shown in FIG.

3 is a front view of the receptacle shown in FIG. 1. FIG.

FIG. 4 is a side sectional view showing a fitted state of the connector shown in FIG.

FIG. 5 is a wiring diagram of a charging device using the connector shown in FIG.

FIG. 6 is a front view of the charging device shown in FIG.

FIG. 7 is a side view of the charging device shown in FIG.

FIG. 8 is a side sectional view of a conventional receptacle.

9 is a front view of the receptacle shown in FIG. 8. FIG.

FIG. 10 is a side sectional view of a conventional plug.

11 is a front view of the plug shown in FIG.

[Explanation of symbols]

 9 Connector 10 Receptacle 11 Plug 16 Positioning Key 18 Socket Contact 23 Keyway 26 Pin Contact

Claims (1)

[Claims] 1. A charging connector in which a battery and a charger of an electric vehicle are connected by a receptacle on the vehicle body side and a plug on the charger side, and a pair of contacts symmetrically arranged inside are connected via a positioning key, Install a pair of socket contacts to be placed in the receptacle at the back position,
When the receptacle and the plug are opposed to each other, the distance between the tip of the positioning key provided on the receptacle and the edge of the key groove formed on the plug is determined by the distance between the tip of the socket contact and the plug. A battery charging connector characterized in that the distance between the pin contact and the tip is increased.