JP2009099429A - High voltage cable connection device for vehicle driving power - Google Patents

Abstract

An object of the present invention is to suppress exposure of a conductor at the time of breakage in a high-voltage cable connection device for vehicle driving power of an electric vehicle.
A vehicle driving power high-voltage cable connecting device includes a male connector having a cylindrical portion having a terminal on the bottom surface, a female connector having a cylindrical portion receiving hole having a terminal on the bottom surface, and a conductive spring. Is done. At the time of connection, a conductive spring is inserted into the tubular portion, and the male connector tubular portion is coupled so as to fit into the tubular portion accommodation hole of the female connector.
[Selection] Figure 2

Description

  The present invention relates to a structure of a connection device for a high voltage cable for transmitting vehicle driving power.

  An electric vehicle such as a hybrid vehicle or an electric vehicle having a motor as a drive source and a secondary battery as a power supply source drives the motor with high voltage power from the secondary battery and travels. Specifically, the power supply path from the secondary battery of the electric vehicle to the motor includes a secondary battery, a DC / DC converter that boosts / decreases the DC voltage, and the DC power on the secondary battery side is used to drive the AC. It is comprised with the inverter and motor which convert into electric power. In many cases, individual devices are connected by a high-voltage cable.

  On the other hand, as a method for supplying power by electrically connecting terminals, there is a method using a conductive coil spring as described in Patent Document 1. In this method, the pin-shaped terminal portion of the high-voltage terminal on the ignition cable side is inserted into the cylindrical terminal fitted and accommodated in the accommodation hole portion of the ignition coil-side high voltage supply side terminal, and the conductive coil spring is connected to the pin-shaped terminal portion. In this state, the high voltage terminal is connected to the high voltage supply side terminal.

  Similarly, Patent Document 2 describes a method of electrically connecting a plurality of terminals simultaneously with a conductive elastic member. In this method, a contact spring that electrically connects a number of electrical contacts on the back surface of the substrate of the semiconductor package and the conductor portion of the wiring plate, and a lower portion of the contact spring are held and positioned with respect to the conductor portion of the wiring plate. It consists of a plate-shaped holder and a guide plate that captures and guides the upper part of the contact spring and centers many electrical contacts on the back side of the substrate of the semiconductor package, and compresses the contact spring to electrically connect the terminals It is a method to do.

JP 2000-110698 A International Publication No. 2003/007435 Pamphlet

  By the way, in the connection of the high-voltage cable of the electric vehicle as described above, the ring-shaped terminal attached to the core wire of the high-voltage cable is often connected to the terminal block of each device by bolting, and such a connection structure Then, in the event of a collision due to an accident, the high-voltage cable may be disconnected, and the terminal may contact the vehicle body and damage other equipment. However, the method described in Patent Document 1 has a structure in which the pin-like terminal portion of the high voltage terminal on the ignition cable side protrudes from the opening surface of the cover when the ignition cable is disconnected. May damage other equipment. The method described in Patent Document 2 has a structure in which a number of electrical contacts on the back surface of the substrate are exposed when the semiconductor package is separated from the guide plate, and the conductor portion is exposed when the wiring plate is removed. So there is a similar possibility.

  An object of the present invention is to suppress exposure of a conductor when a vehicle drive power high-voltage cable connection device is damaged.

  A high-voltage cable connecting device for vehicle driving power according to the present invention includes a male connector provided with an insulating cylindrical portion, and a first terminal provided at the bottom of the cylindrical portion and connected to the first cable. A female connector including a hole having an opening having an inner shape dimension larger than the outer dimension of the cylindrical portion, and a second terminal provided at the bottom of the hole and connected to the second cable. A high-voltage cable connection device for vehicle driving power, which is inserted into a cylindrical portion, and the first terminal and the second terminal are connected when the cylindrical portion of the male connector is fitted into the hole of the female connector to connect each connector. It is characterized by having a conductive spring which is compressed in contact with the terminals and electrically connects the terminals.

  In the vehicle drive power high-voltage cable connection device according to the present invention, the conductive spring is longer than the distance between the bottom of the cylindrical portion and the bottom of the hole when the male connector and the female connector are coupled. It is also preferable to have a natural length shorter than the sum of the length of the cylindrical portion and the length of the hole of the female connector.

  In the high-voltage cable connecting device for vehicle driving power according to the present invention, it is preferable that the length of the cylindrical portion of the male connector and the length of the hole of the female connector are substantially the same.

  Another high-voltage cable connection device for driving power of a vehicle according to the present invention includes an insulating tubular portion and a first terminal provided inside the tubular portion and connected to the first cable. A connector, a hole having an opening with an inner dimension larger than the outer dimension of the cylindrical part, and a convex part provided at the bottom of the hole and having an outer dimension smaller than the inner dimension of the opening of the cylindrical part; A female connector provided on the end surface of the convex portion and connected to the second terminal to which the second cable is connected; and is inserted into the cylindrical portion, and the cylindrical portion of the male connector is fitted into the hole of the female connector. When connecting the connectors so that the convex part of the hole of the female connector enters the inside of the cylindrical part of the male connector, the first terminal and the second terminal are pressed against each other and compressed. And a high-voltage cable connection device for vehicle driving power comprising a conductive spring for electrically connecting The conductive spring is longer than the distance between the first terminal and the second terminal when the male connector and the female connector are coupled, and the first terminal extends from the cylindrical portion opening surface of the male connector. And a natural length shorter than any of the length from the opening surface of the hole of the female connector to the second terminal.

  The vehicle driving power high-voltage cable connection device according to the present invention is preferably provided with a spring compressed state holding means for holding the conductive springs in a compressed state by bringing the opposing surfaces of the male connector and the female connector into contact with each other.

  In the vehicle drive power high-voltage cable connection device according to the present invention, when the cylindrical portion of the male connector comes out from the hole of the female connector, the conductive spring can jump out of the cylindrical portion by its repulsive force. Is also preferable.

  In the vehicle driving power high-voltage cable connecting device, there is an effect that the exposure of the conductor can be suppressed at the time of breakage.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the vehicle driving power high-voltage cable connection device 1000 is connected to a male connector 100 connected to an inverter (not shown) via a first cable 110 and to a motor (not shown) via a second cable 210. The female connector 200, the conductive spring 300, and the bolt 130 and the nut 230 that hold the male connector 100 and the female connector 200 together are provided.

  A male connector 100 made by molding an insulating material is provided on the male connector side joining surface 103, for example, an insulating cylindrical portion 101 having a square cross section and a terminal provided on the bottom surface 104 of the cylindrical portion. It has the 1st terminal 120 to which the 1st cable 110 fixed to the end surface 109 of the support convex part 108 is connected. The male connector 100 is integrally formed with a male connector side flange 106 that is a plate having a bolt fastening hole that protrudes from the male connector side joint surface 103 to the side surface side.

  The tubular portion 101 has a tubular portion bottom surface 104 on the male connector side joining surface 103 and is open in the coupling direction with the female connector 200. A terminal support convex portion 108 is provided on the cylindrical portion bottom surface 104. The internal shape of the cylindrical portion 101 has such a shape that the end portion of the conductive spring 300 enters between the inner peripheral surface of the cylindrical portion 101 and the outer peripheral surface of the terminal support convex portion 108. The length is a dimension and a length that can be accommodated in a cylindrical portion accommodation hole 201 of the female connector 200 described later. The tubular portion 101 is formed integrally with the male connector 100 that is an insulator. The cross-sectional shape of the inner shape and the outer shape of the cylindrical portion 101 may be another polygonal shape or a circular shape.

  The first cable 110 is composed of three first electric wires 111 made of a conductive first core wire 112 covered with an insulator. The first cable 110 may be configured by bundling three first electric wires 111 with a sheath. In this case, a shield structure may be provided between the first electric wire 111 and the sheath at once or individually.

  The first terminal 120 is subjected to processing for crimping the first core wire 112 of the first electric wire 111 to one end of a long plate-like metal plate to form a first electric wire crimping portion 122, and the other end is For example, the first conductive contact end 121 is provided by bending into a U-shape. The shape of the other end is not limited to the U shape as long as it can be fixed to the male connector 100, and may be other shapes. The first conductive contact end 121 has a smaller area than the end surface 109 of the terminal support convex portion 108. When the end of the conductive spring 300 enters between the inner peripheral surface of the tubular portion 101 and the outer peripheral surface of the terminal support convex portion 108, the first terminal 120 is electrically conductive. In order to avoid contact with the inner peripheral surface of the elastic spring 300, it is fixed to the first terminal fixing groove 105 so as to be located inside the outer periphery of the end surface 109 of the terminal support convex portion 108. The first terminals 120 are provided in the male connector 100 by the number of the first electric wires 111.

  The first cable opening 107 provided in the male connector 100 has a structure for guiding the three first electric wires 111 of the first cable 110 individually into the male connector 100. The first cable opening 107 is provided with a clamp mechanism (not shown) so that a load is not directly applied to the first terminal 120 even if a load is applied to the first electric wire 111.

  The female connector 200 is formed by molding an insulating material in the same manner as the male connector 100, and is fixed to the cylindrical portion receiving hole 201 opened on the female connector side joining surface 203 and the cylindrical portion receiving hole bottom surface 204. It has the 2nd conduction contact end 221 of the 2nd terminal 220 to which the 2nd cable 210 is connected. The female connector 200 is integrally formed with a female connector side flange 206 that is a plate having a bolt fastening hole that protrudes from the female connector side joining surface 203 to the side surface. Hereinafter, only the difference between the female connector 200 and the male connector 100 will be described. Since the second cable 210 has the same configuration as the first cable 110, detailed description thereof is omitted.

  The cylindrical portion accommodation hole 201 opens in the female connector side joint surface 203, the depth is substantially the same as the length of the cylindrical portion 101, and the size of the opening surface 202 is larger than the cross-sectional outer dimension of the cylindrical portion 101, At the time of connector connection, the tubular portion 101 is formed so as to be accommodated.

  The second terminal 220 has the same configuration as that of the first terminal 120 and is fixed to the second terminal fixing groove 205 so that the second conductive contact end 221 appears on the bottom surface 204 of the cylindrical portion accommodating hole. .

  The conductive spring 300 has a diameter smaller than the inner shape of the cylindrical portion 101, and is inserted between the inner peripheral surface of the cylindrical portion 101 and the outer peripheral surface of the terminal support convex portion 108. The end surface 301 of the conductive spring 300 can be brought into contact with the second conductive contact end portion 221 of the cylindrical portion accommodation hole bottom surface 204. Moreover, the length is longer than the distance between the cylindrical part bottom face 104 of the male connector 100 and the cylindrical part accommodation hole bottom face 204 of the female connector 200 when the male connector 100 and the female connector 200 are coupled, and contacts the respective parts. And the length is shorter than the sum of the length of the cylindrical portion 101 and the depth of the cylindrical portion receiving hole 201. For example, the length of the conductive spring 300 may have a natural length that is longer than the length of the tubular portion 101 by about half of the length of the tubular portion 101 as shown in FIG. The conductive spring 300 is inserted between the windings in the substantially vertical direction with respect to the axial direction, and is a conductive metal plate 304 that is smaller than the inner shape of the cylindrical portion 101 and larger than the inner diameter of the conductive spring 300. The metal plate 304 and the conductive spring 300 are always electrically connected. The metal plate 304 contacts the conductive contact end portion 121 of the first terminal 120 when the male connector 100 and the female connector 200 are coupled and the conductive spring 300 is compressed. When the metal plate 304 is not compressed, the metal plate 304 is conductive. It is inserted into a position separated from the contact end 121.

  As shown in FIG. 2, when the connectors are coupled, the conductive springs 300 are inserted into the respective cylindrical portions 101 of the male connector 100 one by one, and the tube of the male connector 100 is kept in a state where the conductive spring 300 is inserted. The portion 101 is coupled so as to fit into the tubular portion accommodation hole 201 of the female connector 200. Since the conductive spring 300 is compressed when each connector joint surface is engaged, the conductive spring 300 has a repulsive force in a direction in which the connector is disconnected. The bolt 130, the nut 230, the male connector side flange 106, and the female connector side flange 206 constitute a spring compression state holding means. When the connector is coupled, the bolt 130 and the nut 230 are used to connect the male connector side flange 106 and the female connector side flange 206. The connector-side flange 206 is overlapped and fastened together to compress the conductive spring 300, and the terminals are electrically connected via the metal plate 304 and the conductive spring 300. Not only bolt fastening but also a hook that is externally attached to one connector and an appropriate shape that hooks the hook to the other connector may be integrally provided to maintain the connector connection state. By connecting the connectors as described above, they are electrically connected, and transmission of the current of each phase of the three-phase alternating current between the inverter and the motor becomes possible. Since the spring is used for the connection between the terminals, a stable electrical connection can be maintained even when the vehicle is subjected to vibrations due to traveling.

  In the vehicle driving power high-voltage cable connection device of the present embodiment having the above-described configuration, either the first terminal 120 or the second terminal 220 has a three-phase alternating current that is high voltage power, Even when the connectors 100 and 200 are uncoupled, the first conductive contact end 121 of the first terminal 120 is connected to the end surface 109 of the terminal support convex portion 108 of the cylindrical portion bottom surface 104 of the male connector 100. Since the second conductive contact end portion 221 of the terminal 220 is provided on the cylindrical portion receiving hole bottom surface 204 of the female connector 200, the respective conductive contact end portions 121 and 221 contact other devices mounted on the vehicle. And will not be damaged. In addition, since the length of the conductive spring 300 is shorter than the sum of the length of the cylindrical portion 101 and the depth of the cylindrical portion receiving hole 201 as described above, when the two connectors 100 and 200 are separated from each other. In addition, the conductive spring center portion 302 having a three-phase alternating current, which is a high voltage power, is formed in the cylindrical portion opening surface 102 while the conductive contact end portions 121 and 221 of both the connectors 100 and 200 are electrically connected. And exposure between the cylindrical portion accommodation hole opening surface 202 can be suppressed. Furthermore, since the conductive spring 300 has a structure that is not fixed to the cylindrical portion bottom surface 104 and the second conductive contact end 221, when the connectors 100 and 200 are disconnected, the conductive spring 300 is cylindrical due to the repulsive force of the conductive spring 300. It is possible to prevent the spring 300 that has come off from the portion 101 and is electrically disconnected from the conductive contact end portions 121 and 221 from being cut off and not to be energized and to be similarly damaged. Even when the conductive spring 300 remains in the cylindrical portion 101, the metal plate 304 of the conductive spring 300 at the time of non-compression is separated from the first conductive contact end portion 121. The electrical connection between the first terminal 120 and the first terminal 120 is cut off, and the conductive spring 300 is not exposed by protruding from the cylindrical opening surface 102 while being charged with high voltage power. It can suppress that it contacts and damages an apparatus.

  Hereinafter, another embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 3, the vehicle driving power high-voltage cable connection device 2000 is connected to a motor (not shown) via a first connector 110 and a male connector 400 connected to an inverter (not shown) and a second cable 210. Female connector 500, conductive spring 600, connector coupling holding bolt 130 and nut 230. A description of the same parts as those described in the above embodiment will be omitted.

  The tubular portion bottom surface 404 of the tubular portion 401 of the male connector 400 is raised from the male connector side joining surface 403 toward the tubular portion opening surface 402. The first terminal 420 is fixed to the first terminal fixing groove 405 so that the first conductive contact end 421 appears on the bottom surface 404 of the cylindrical part.

  A convex portion 508 is provided on the bottom surface 504 of the cylindrical portion receiving hole of the female connector 500, and the flange at the tip of the cylindrical portion 401 is between the inner peripheral surface of the cylindrical portion receiving hole 501 and the outer peripheral surface of the convex portion 508 when the connector is coupled. It is configured to be fitted in the groove 510.

  The length of the conductive spring 600 is such that the conductive spring 600 is brought into contact with the first conductive contact end 421 of the bottom surface 404 of the cylindrical portion that is raised to the natural length, and the end surface 509 of the convex portion 508 is the first. To the extent that the conductive spring 600 does not protrude from the cylindrical portion opening surface 402 or the cylindrical portion receiving hole opening surface 502 in any state in which the conductive spring 600 is brought into contact with the second conductive contact end portion 521 with its natural length. Between the conductive contact ends 421 and 521 at the time of coupling so that the male connector 400 and the female connector 500 are compressed while being in contact with the conductive contact ends 421 and 521 of the connectors 400 and 500, respectively. It has a natural length longer than the distance. Further, the height of the bottom surface 404 of the tubular portion 404 of the male connector 400 which is raised from the male connector side joining surface 403 or the tubular portion of the female connector 500 is accommodated so as to satisfy the length condition of the conductive spring 600 described above. The height of the convex portion 508 from the hole bottom surface 504 may be set. Unlike the conductive spring 300 of the above-described embodiment, the conductive spring 600 of this embodiment does not include the metal plate 304.

  As shown in FIG. 4, connector connection can be performed in the same manner as in the above-described embodiment, and stable electrical connection can be realized. In this embodiment, unlike the previous embodiment, the end surface 601 of the conductive spring 600 directly contacts the first conductive contact end 421 of the male connector 400, so that the terminals are electrically connected. The

  Similar to the above embodiment, even when either of the first terminal 420 or the second terminal 520 is in a three-phase alternating current that is high voltage power, the connectors 400 and 500 are disconnected. The first conductive contact end portion 421 of the first terminal 420 is accommodated in the cylindrical portion bottom surface 404 of the male connector 400, and the second conductive contact end portion 521 of the second terminal 520 is accommodated in the cylindrical portion of the female connector 500. Since it is provided on the end surface 509 of the convex portion 508 of the hole bottom surface 504, the respective conductive contact end portions 421 and 521 do not come into contact with and damage the other devices mounted on the vehicle.

  Furthermore, in the present embodiment, the end surface 601 of the conductive spring 600 is in contact with either the first conductive contact end 421 or the second conductive contact end 521, and the cylindrical portion 401 or the cylindrical portion receiving hole. Even in the case of staying in 501, the length of the non-compressed conductive spring 600 is such that it does not protrude from the cylindrical portion opening surface 402 or the cylindrical portion receiving hole opening surface 502 as described above. Therefore, the conductive spring 600 does not protrude from the cylindrical portion opening surface 402 or the cylindrical portion receiving hole opening surface 502 while being charged with high voltage power, and does not come into contact with other devices mounted on the vehicle. Damage can be suppressed. In the present embodiment, the end surface 601 of the conductive spring 600 may have a structure that is fixed to either the first conductive contact end 421 or the second conductive contact end 521. .

  In the above-described two embodiments, the vehicle drive power high-voltage cable connection device according to the present invention is provided between the inverter and the motor on which the three-phase alternating current is transmitted on the power supply path of an electric vehicle such as a hybrid vehicle or an electric vehicle. Although the case has been described, as long as high voltage power is transmitted, it may be applied not only between the inverter and the motor but also between other devices. The number of terminals may be changed according to the place where it is applied. Further, although the inverter side is a male connector and the motor side is a female connector, the configuration may be reversed. One of the two connectors may be a terminal block fixed to the housing of each device.

It is a figure which shows the cross section in the state in which the connector of the high voltage | pressure cable connection apparatus for vehicle drive electric power in embodiment which concerns on this invention is not couple | bonded. It is a figure which shows the cross section at the time of the connector coupling | bonding of the high voltage | pressure cable connection apparatus for vehicle drive electric power in embodiment which concerns on this invention. It is a figure which shows the cross section in the state in which the connector of the high voltage | pressure cable connection apparatus for vehicle drive power in other embodiment which concerns on this invention is not couple | bonded. It is a figure which shows the cross section at the time of connector coupling | bonding of the high voltage | pressure cable connection apparatus for vehicle drive electric power in other embodiment which concerns on this invention.

Explanation of symbols

  100, 400 Male connector, 101, 401 Cylindrical part, 102, 402 Cylindrical part opening surface, 103, 403 Male connector side joining surface, 104 Cylindrical part bottom surface, 105, 405 First terminal fixing groove, 106, 406 Male connector side flange, 107, 407 First cable opening, 108 Terminal support convex portion, 109 End surface of terminal support convex portion, 110 First cable, 111 First electric wire, 112 First core wire, 120, 420 1st terminal, 121, 421 1st conduction contact end, 122, 422 1st electric wire crimping part, 130 bolt, 200, 500 Female connector, 201, 501 Cylindrical part accommodation hole, 202, 502 Cylindrical shape Part receiving hole opening face, 203, 503 female connector side joining face, 204, 504 cylindrical part receiving hole bottom face, 205, 505 second terminal fixing groove, 206 , 506 Female connector side flange, 207, 507 Second cable opening, 210 Second cable, 211 Second electric wire, 212 Second core wire, 220, 520 Second terminal, 221, 521 Second Conductive contact end portion, 222, 522 Second wire crimping portion, 230 nut, 300, 600 conductive spring, 301, 601 conductive spring end surface, 302 conductive spring central portion, 404 bottom-up cylindrical portion bottom surface, 508 Convex part, 509 End face of convex part, 510 Groove between inner peripheral surface of cylindrical part accommodation hole and outer peripheral surface of convex part, 1000, 2000 High voltage cable connection device for vehicle driving power.

Claims (6)

A male connector comprising: an insulating tubular portion; and a first terminal provided at the bottom of the tubular portion and connected to the first cable;
A female connector comprising: a hole having an opening with an inner dimension larger than the outer dimension of the cylindrical part; and a second terminal provided at the bottom of the hole to which a second cable is connected;
A high-voltage cable connection device for vehicle driving power including:
Inserted inside the cylindrical part, when the male part's cylindrical part is fitted into the hole of the female connector to connect each connector, the first terminal and the second terminal are pressed against each other and compressed. Having a conductive spring to electrically connect the
A high-voltage cable connection device for vehicle driving power characterized by the above. The vehicle drive power high-voltage cable connection device according to claim 1,
The conductive spring is
Naturally longer than the distance between the bottom of the cylindrical part and the bottom of the hole when the male connector and the female connector are combined, and shorter than the sum of the length of the male connector's cylindrical part and the hole of the female connector Having a length,
A high-voltage cable connection device for vehicle driving power characterized by the above. The vehicle drive power high-voltage cable connection device according to claim 1 or 2,
The length of the cylindrical part of the male connector and the length of the hole of the female connector are substantially the same,
A high-voltage cable connection device for vehicle driving power characterized by the above. A male connector comprising: an insulating tubular portion; and a first terminal provided in the tubular portion and connected to the first cable;
A hole having an opening with an inner shape dimension larger than the outer dimension of the cylindrical part, a convex part provided at the bottom of the hole and having an outer dimension smaller than the inner dimension of the opening of the cylindrical part, and a convex part A female connector comprising: a second terminal connected to the second cable;
When connecting the connectors so that the cylindrical portion of the male connector is inserted into the cylindrical portion of the female connector and the convex portion of the female connector hole is inserted into the cylindrical portion of the male connector. A conductive spring that contacts and compresses the first terminal and the second terminal to electrically connect the terminals;
A vehicle drive power high-voltage cable connection device comprising:
The conductive spring is
When connecting the male connector and the female connector, the distance between the first terminal and the second terminal is longer than the distance from the cylindrical portion opening surface of the male connector to the first terminal and the hole of the female connector. Having a natural length shorter than any of the lengths from the opening surface to the second terminal;
A high-voltage cable connection device for vehicle driving power characterized by the above. The vehicle drive power high-voltage cable connection device according to any one of claims 1 to 4,
Comprising a spring compression state holding means for holding the conductive springs in a compressed state by contacting the opposing surfaces of the male connector and the female connector;
A high-voltage cable connection device for vehicle driving power characterized by the above. The vehicle drive power high-voltage cable connection device according to any one of claims 1 to 5,
When the cylindrical part of the male connector comes out of the hole of the female connector, the conductive spring can jump out of the cylindrical part by its repulsive force,
A high-voltage cable connection device for vehicle driving power characterized by the above.

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