JP2015122250A - Conductive member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase heat dissipation with a simple configuration in a conductive member as an internal wiring.SOLUTION: A braided wire 10 connects a gap between a first terminal 62 arranged inside an inverter case 20, and a second terminal 72 arranged inside the inverter case 20 and connected with a motor side terminal 52 arranged on a motor case 30 side, and is arranged inside the inverter case 20 as an internal wiring, where a single heat dissipation layer 10A is formed on the surface. Since the heat dissipation layer is simply configured to be a single layer, therefore a plurality of materials are not required for forming the heat dissipation layer, and even when the heat dissipation layer is formed on the surface, it is difficult to increase a thickness of a conductive member.

Description

  The present invention relates to a conductive member.

  In a conductive member through which a large current is passed, the surface temperature of the conductive member is likely to be high, and thus high heat dissipation is required. Therefore, conventionally, a conductive member disposed in the case or the like has been known which has improved heat dissipation. For example, Patent Document 1 discloses a lead wire that is excellent in heat dissipation by coating a layer having heat dissipation on the outer periphery.

JP 2013-101917 A

  However, the conducting wire of Patent Document 1 has a configuration in which the heat dissipation performance is kept high by coating the outer periphery with a layer having heat dissipation properties twice. For this reason, a plurality of materials are required to coat the outer periphery of the conducting wire. In addition, by coating the outer layer with a double layer, the thickness of the conductive wire increases, which may make it difficult to route the conductive wire.

  The present invention was created in view of the above-described problems, and an object of the present invention is to improve heat dissipation with a simple configuration in a conductive member as an internal wiring.

  The conductive member of the present invention includes a first connection portion disposed inside the main body side case and a second connection portion disposed within the main body side case and connected to the third connection portion disposed on the counterpart case side. It is a conductive member as an internal wiring that is connected to the connecting portion and is arranged inside the case on the main body side, wherein a single heat dissipation layer is formed on the surface.

  According to said electrically conductive member, heat dissipation can be improved with the heat dissipation layer formed in the surface. In addition, since the heat dissipation layer has a simple structure, a plurality of materials are not required to form the heat dissipation layer, and even if the heat dissipation layer is formed on the surface, the thickness of the conductive member increases. It has become difficult. As described above, in the conductive member as the internal wiring, heat dissipation can be improved with a simple configuration.

  In the conductive member, the heat dissipation layer may be a layer formed by coating an organic substance on the surface. Alternatively, the heat dissipation layer may be a layer formed by oxidizing the surface. The heat dissipation layer may be a layer formed by oxidizing the surface.

  According to these, a specific configuration for forming the heat dissipation layer on the surface of the conductive member can be realized.

  In the conductive member, the heat dissipation layer may be black.

  According to this configuration, since the heat dissipation efficiency of the heat dissipation layer is increased as compared with the case where the heat dissipation layer is other than black, the heat dissipation performance of the heat dissipation layer can be further enhanced.

  One of the main body side case and the counterpart case may be an inverter case that houses an inverter, and the other may be a motor case that houses a motor.

  Since a large current is passed through the internal wiring arranged in the inverter case and the motor case, high heat dissipation is required. According to said structure, the electrically conductive member suitable as an internal wiring distribute | arranged in an inverter case or a motor case is realizable.

  According to the present invention, in a conductive member as an internal wiring, heat dissipation can be enhanced with a simple configuration.

Top view of the fitting part between the inverter side terminal block and the motor side terminal block as seen from above Front view of the fitting part between the inverter side terminal block and the motor side terminal block as seen from the front FIG. 3 is a sectional view taken along the line III-III in FIG. Expanded cross section of the inverter side terminal block Sectional drawing showing the fitting part of an inverter side terminal and a motor side terminal in a modification

  The embodiment will be described with reference to FIGS. In the present embodiment, as an example of the conductive member, for example, in a hybrid vehicle or an electric vehicle, a braided wire 10 that constitutes a part of the connector 1 that electrically connects an inverter (not shown) and a motor (not shown) is illustrated. A part of each drawing shows an X axis, a Y axis, and a Z axis that are orthogonal to each other, and each axis direction is drawn in the direction shown in each drawing. Of these, the Z-axis direction coincides with the vertical direction with the upper side of the paper in FIGS.

  As shown in FIG. 3, the connector 1 includes a braided wire 10, an inverter case (an example of a body side case) 20, a motor case (an example of a counterpart case) 30, an inverter side terminal block 40, and a motor side. A terminal block 50; a first housing 60 and a second housing 70 supported by the inverter-side terminal block 40; a first terminal (an example of a first connection portion) 62 held in the first housing 60; And a second terminal (an example of a second connection portion) 72 held by the housing 70.

  In the present embodiment, the upper side is the inverter side, the lower side is the motor side, the inverter is accommodated in the inverter case 20, and the motor is accommodated in the motor case 30. In each drawing, only the lower part covering the lower side of the inverter is illustrated for the inverter case 20, and only the upper part covering the upper side of the motor is illustrated for the motor case 30.

  As shown in FIGS. 1 and 2, six connectors 1 are arranged in parallel in the Y-axis direction between the inverter side and the motor side, and electrically connect the inverter and the motor. It is a relay terminal. Specifically, as shown in FIG. 3, the connector 1 includes an inverter-side terminal 82 held in an inverter-side housing 80 provided on the inverter side, and a motor-side housing 51 provided on the motor-side terminal block 50. A motor-side terminal (an example of a third connection portion) 52 held in the interior is electrically connected.

  As shown in FIG. 3, the inverter-side housing 80 opens downward and is disposed above the lower portion of the inverter case 20. The inverter side terminal 82 is a male terminal and is held in the inverter side housing 80 with the lower side as a connection side. The inverter side terminal 82 is electrically connected to the inverter and extends from the inverter side, and supplies AC power supplied from the inverter side to the motor.

  As shown in FIG. 3, the motor-side housing 51 opens upward, and is provided in a part of the motor-side terminal block 50 placed on the upper portion of the motor case 30. The motor side terminal 52 is a male terminal and is held in the motor side housing 51 with the upper side as a connection side. The motor side terminal 52 extends to the motor side and is electrically connected to the motor, and supplies AC power supplied via the connector 1 to the motor side.

  First, the configuration of other members excluding the braided wire 10 among the members configuring the connector 1 will be described. As shown in FIGS. 3 and 4, the inverter case 20 has an inverter side rib 22 projecting downward in a rib shape at a part of the lower portion thereof, and an inverter side surrounded by the inverter side rib 22. An opening 24 is provided. On the other hand, the motor case 30 is provided with a motor side rib 32 projecting upward in a rib shape and a motor side opening 34 surrounded by the motor side rib 32 in a part of the upper portion thereof. .

  As shown in FIG. 1, the inverter-side terminal block 40 is a member that is smaller in size in plan view than the lower portion of the inverter case 20. As shown in FIGS. 3 and 4, the inverter-side terminal block 40 is provided with a first mounting portion 42 and a second mounting portion 44. Of these, the first mounting portion 42 overlaps the inverter-side housing 80 in the vertical direction with the inverter-side terminal block 40 on the lower side, and the second mounting portion 44 has the inverter-side terminal block 40 on the upper side. It overlaps with the housing 51 in the vertical direction.

  As shown in FIG. 4, the first housing 60 has a substantially cylindrical shape with the vertical direction as the cylinder axis direction, and can slide in the XY plane direction on the first mounting portion 42 of the inverter side terminal block 40. Is supported in a floating manner. On the other hand, the second housing 70 has a substantially cylindrical shape with the vertical direction as the cylinder axis direction, and is floatingly supported on the second mounting portion 44 of the inverter-side terminal block 40 so as to be slidable in the XY plane direction. Has been.

  The first terminal 62 is a female terminal, and is held on the upper opening side in the first housing 60 by a lance 64 extending from the inner wall of the first housing 60 with its connection port facing upward. The inverter-side housing 80 is fitted into the first housing 60 from above, whereby the inverter-side terminal 82 and the first terminal 62 are male-female fitted in the vertical direction, and the terminals 82, 62 are connected between the two terminals. Electrically connected.

  The second terminal 72 is a female terminal and is held on the upper opening side in the second housing 70 by a lance 74 extending from the inner wall of the second housing 70 with the connection port facing downward. The motor-side housing 51 is fitted into the second housing 70 from below, so that the motor-side terminal 52 and the second terminal 72 are male-female fitted in the vertical direction, and the terminals 52, 72 are connected to each other. Electrically connected.

  A portion of the first terminal 62 opposite to the connection port extends to the vicinity of the lower opening along the inner wall of the first housing 60 and is connected to one end of the braided wire 10. Further, the second terminal 72 has a part on the opposite side to the connection port extending along the inner wall of the second housing 70 to the vicinity of the upper opening, and is connected to the other end of the braided wire 10. Accordingly, the first terminal 62 and the second terminal 72 are electrically connected by the braided wire 10 in the inverter-side terminal block 40.

  As shown in FIG. 3, the lower surface of the inverter side terminal block 40 is directed to the lower inner wall of the inverter case 20, and the lower portion of the second housing 70 is inserted into the inverter side opening 24 of the inverter case 20. In this state, it is assembled and fixed to the inverter case 20. For this reason, the inverter side terminal block 40 is located inside the inverter case 20. Therefore, it can be said that the braided wire 10 arranged in the inverter side terminal block 40 is an internal wiring arranged in the inverter case 20.

  As shown in FIG. 3, the motor side terminal block 50 is assembled to the motor case 30 so as to be placed on the upper portion of the motor case 30. As shown in FIG. 3, the motor-side terminal block 50 is provided with a main body portion 54 that has a substantially plate shape, and a protruding portion 56 that protrudes vertically from a part of the main body portion 54. The upper portion of the protrusion 56 in the motor side terminal block 50 is the motor side housing 51 described above. The motor-side terminal 52 held in the motor-side housing 51 extends in the up-down direction in the protruding portion 56 and is electrically connected to the motor.

  As shown in FIG. 3, the motor-side terminal block 50 has a main body portion 54 placed on the motor-side rib 22 of the motor case 30 and a lower portion of the projecting portion 54 of the motor case 30. In a state of being inserted into the side opening 34, it is fastened to the motor case 30 by being fastened to the motor case 30 by a bolt (see FIGS. 1 and 2) B.

  In addition, as shown in FIG. 3, between the main body part of the motor side terminal block 50 and the motor side rib 32 of the motor case 30, and between the inverter side rib 22 of the inverter case 20 and the main body part of the motor side terminal block 50, Sealing members S1 and S2 are arranged between them. This prevents water or the like from entering the fitting portion between the motor side terminal 52 and the second terminal 72.

  Next, the configuration of the braided wire 10 will be described. The braided wire 10 is a conductive member having flexibility, and is routed in the inverter-side terminal block 40 in a state where the first terminal 62 and the second terminal 72 are connected. In the braided wire 10, a single heat dissipation layer 10 </ b> A is formed on the surface of the braided wire 10 excluding the connection portion with the first terminal 62 and the connection portion with the second terminal 72.

  The heat radiation layer 10A on the surface of the braided wire 10 is black, for example, by coating the surface of the braided wire 10, or by performing plating on the surface of the braided wire 10, or oxidizing the surface of the braided wire 10 It is formed.

  As an example of coating the surface of the braided wire 10, the surface of the braided wire 10 is painted black by taking out the core wire from the insulation coating of the braided wire 10 and attaching an organic substance such as enamel to the surface of the core wire. To do. An example of applying a plating treatment to the surface of the braided wire 10 is electroless plating of the surface of the braided wire 10 with black nickel. One example of oxidizing the surface of the braided wire 10 is to oxidize the surface of the braided wire 10 to obtain black copper oxide.

  Since the braided wire 10 has such a heat dissipation layer 10A formed on the surface, the surface reflectance (glossiness) is reduced as compared with the case where the heat dissipation layer 10A is not formed on the surface. Here, in a conductive member having flexibility, there is a negative correlation between the reflectance of the surface and the emissivity of heat from the surface, with one increasing as the other decreases. Therefore, in the braided wire 10, the heat dissipation is improved by reducing the reflectance (glossiness) of the surface, and the heat generated from the braided wire 1 is effectively dissipated.

  As described above, according to the braided wire 10 of the present embodiment, the heat dissipation can be enhanced by the heat dissipation layer 10A formed on the surface. Further, since the heat dissipation layer 10A has a simple structure, a plurality of materials are not required to form the heat dissipation layer 10A, and even if the heat dissipation layer 10A is formed on the surface, the braided wire 10 The thickness of is difficult to increase. Thus, in the braided wire 10 of the present embodiment as the internal wiring arranged in the inverter case 10, the heat dissipation can be improved with a simple configuration.

  In the braided wire 10 of the present embodiment, the heat dissipation layer 10A is black. With such a configuration, the heat dissipation efficiency of the heat dissipation layer 10A is increased as compared with the case where the heat dissipation layer 10A is other than black, and thus the heat dissipation performance of the heat dissipation layer 10A can be further enhanced.

  Further, in the braided wire 10 used for connection between the inverter and the motor in the hybrid vehicle or the electric vehicle as in this embodiment, since a large current is applied, the amount of heat generated by the braided wire 10 is likely to increase. High heat dissipation is required. In this regard, it is preferable to use the braided wire 10 of the present embodiment with improved heat dissipation for the connection between the inverter and the motor.

  Further, the interior of the inverter case 20 has a larger air capacity than the interior of the first housing 60, the second housing 70, etc., and a temperature difference is likely to occur (heat is not easily generated). For this reason, by using the braided wire 10 of the present embodiment as the internal wiring arranged in the inverter case 20, it is possible to effectively suppress an increase in the environmental temperature around the braided wire 10.

<Modification>
Next, a modification of the embodiment will be described with reference to FIG. In this modification, a bus bar (an example of a conductive member) 110 is arranged instead of the braided wire 10 in the above embodiment. Since the configuration other than the bus bar 100 is the same as that of the above-described embodiment, the description of the structure, operation, and effect is omitted.

  In the connector 101 according to this modification, as shown in FIG. 5, the first terminal 62 and the second terminal 72 are electrically connected by the bus bar 110. The bus bar 110 is a conductive member having flexibility, and a single heat dissipation layer 110A is formed on the surface. Further, the bus bar 110 has a bellows shape in which a portion excluding a connection portion with the first terminal 62 and a connection portion with the second terminal 72 is undulated in the vertical direction.

  In the present modification, the bus bar 110 as the conductive member has a bellows shape as described above, so that the surface area of the bus bar 110 is increased as compared with the case where the bus bar 110 has a linear shape, for example. Can be increased. Further, since the bus bar 110 has a bellows shape, the flexibility of the bus bar 110 can be increased as compared with the case where the bus bar 110 has a straight shape.

Other modifications of the above embodiment are listed below.
(1) Although the braided wire used as a part of the connector for connecting the inverter and the motor is described as an example of the conductive member in the above embodiment and the modification, the internal wiring arranged in the motor case It may be a conductive member. The present invention is not limited to the conductive member used for connection between the inverter and the motor, but may be a conductive member as an internal wiring disposed in a case constituting another device.

(2) In the above embodiment and the modification, the braided wire and the bus bar are illustrated as an example of the conductive member, but the configuration of the conductive member is not limited. As the conductive member, a flexible terminal, electric wire, or the like may be used.

(3) In the above embodiment and the modification, the configuration in which the heat dissipation layer is black is illustrated, but the color of the heat dissipation layer is not limited.

  As mentioned above, although each embodiment of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  Hereinafter, the present invention will be described in more detail with reference to examples. In addition, this invention is not limited to a following example.

  In this example, in the connector having the same configuration as that described in the above embodiment, when a normal braided wire having no single heat dissipation layer formed on the surface is used, a single heat dissipation layer is provided on the surface. In each of the case where the same braided wire as that of the above-described embodiment was used, the ambient temperature around the braided wire after current was passed through the braided wire was measured.

  In this example, the length of the braided wire was 90 mm, and the surface of the braided wire was coated with enamel black to form a single heat dissipation layer on the surface of the braided wire. In this example, a braided wire was placed inside the inverter case whose environmental temperature was about 100 ° C., and a predetermined current was passed through the braided wire.

  As a result of measuring the ambient temperature around the braided wire after applying a predetermined current to the braided wire, a temperature increase of about 80 ° C. is observed in a normal braided wire that does not have a single heat dissipation layer formed on the surface. It was. On the other hand, in the braided wire having a single heat dissipation layer formed on the surface, a temperature increase of about 70 ° C. was observed.

  In this way, by forming a single heat dissipation layer on the surface of the braided wire, the heat dissipation of the braided wire can be improved, compared to a normal braided wire that does not have a single heat dissipation layer formed on the surface. It was confirmed that a temperature rise suppressing effect of about 10 ° C. was obtained.

DESCRIPTION OF SYMBOLS 1,101 ... Connector 10 ... Braided wire 10A, 110A ... Radiation layer 20 ... Inverter case 22 ... Inverter side rib 24 ... Inverter side opening 30 ... Motor case 32 ... Motor side rib 34 ... Motor side opening 40 ... Inverter side terminal Table 42 ... First mounting portion 44 ... Second mounting portion 50 ... Motor side terminal block 51 ... Motor side housing 52 ... Motor side terminal 54 ... Main body portion 56 ... Projection portion 60 ... First housing 62 ... First terminal 64, 74 ... Lance 70 ... Second housing 72 ... Second terminal 80 ... Inverter side housing 82 ... Inverter side terminal 110 ... Bus bar S1, S2 ... Seal member

Claims (6)

Between the first connection portion arranged inside the main body side case and the second connection portion arranged inside the main body side case and connected to the third connection portion arranged on the counterpart case side. A conductive member as an internal wiring connected and disposed inside the main body side case,
A conductive member, wherein a single heat dissipation layer is formed on a surface.   The conductive member according to claim 1, wherein the heat dissipation layer is a layer formed by coating an organic material on a surface.   The conductive member according to claim 1, wherein the heat dissipation layer is a layer formed by performing plating on the surface.   The conductive member according to claim 1, wherein the heat dissipation layer is a layer formed by oxidizing a surface.   The conductive member according to any one of claims 1 to 4, wherein the heat dissipation layer is black.   Either one of the main body side case and the counterpart case is an inverter case that houses an inverter, and the other is a motor case that houses a motor. The conductive member according to Item 1.

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