JP5733173B2 - Power supply - Google Patents

Description

  The present invention relates to a power supply device for a power supply device of an electric vehicle or a hybrid vehicle, comprising a power supply means from a DC power source to a rotating machine, a power cut-off means when a vehicle collides or falls, and a charge releasing means for a smoothing capacitor.

  In a conventional power supply device, a technique is disclosed in which the electric charge of a smoothing capacitor is discharged by a discharging resistor when the power supply device is displaced in the event of a car collision (see, for example, Patent Document 1). Further, in the conventional power supply device, the power supply from the battery is controlled to be cut off and the electric charge of the smoothing capacitor is controlled to be in the discharged state in accordance with a command from the collision or collision prediction detection means in the controller at the time of a car collision. A technique is disclosed (for example, see Patent Document 2).

JP 2011-125183 A (page 4, FIG. 1) Japanese Patent Laying-Open No. 2006-224772 (page 3-5, FIG. 1)

When an electric vehicle or a hybrid vehicle collides or falls, it is necessary to quickly cut off the power supply to the rotating machine and discharge the electric storage component.
A conventional power supply device includes a smoothing capacitor charge discharging means that is a power storage component, but does not include a power interruption means from a DC power source to a rotating machine. In addition, there is a problem in that power cut-off from the DC power source to the rotating machine cannot be performed if the functions of the controller other than the power supply device do not exist at the time of collision or falling of the automobile.

  The present invention has been made to solve the above-described problems. When an automobile collides or falls, the impact force of the collision or the fall is used regardless of the presence or absence of functions other than the power supply and interruption means. Thus, it is possible to obtain a power supply apparatus capable of immediately discharging the electric charge stored in the smoothing capacitor while interrupting the power supply to the rotating machine.

In the power supply device according to the present invention, a direct current power source, an inverter that converts the direct current power input from the direct current power source into alternating current power to drive a rotary machine, and a pair of direct currents that connect the direct current power source and the inverter A smoothing capacitor connected in parallel to the inverter between the pair of DC buses, a series circuit connected in parallel to the smoothing capacitor, and connected in series with a relay and a resistor; and the DC A power supply device including a joint portion installed on a bus line, wherein the joint portion includes a first shut-off mechanism that shuts off conduction of the DC bus when a predetermined external force is applied; and the relay have a second shut-off mechanism for discharging electric charge of the smoothing capacitor by the resistor by the closed state, the first conductive connected to the DC bus of the DC power supply side And a second conductor facing the first conductor and connected to the DC bus on the inverter side, and the first blocking mechanism includes the first conductor and the second conductor , And a connecting portion that connects the first conductor and the second conductor, and the second blocking mechanism includes the first conductor, the second conductor, and the first conductor. When the predetermined external force is applied to the second conductor, the first interrupting mechanism intersects with the connection when the predetermined external force is applied. The part is removed from a predetermined position to cut off the conduction of the DC bus, and the second breaking mechanism cuts off the intersection and closes the relay .

  In the present invention, when the automobile collides or falls by installing a joint on the DC bus, the impact force of the collision or the fall is used regardless of the existence of functions other than the power supply and interruption means. The electric power stored in the smoothing capacitor can be immediately discharged while the power supply to the machine is cut off.

1 is a block diagram of a power supply device according to a first embodiment of the present invention. It is a schematic cross section of the junction part in 1st Embodiment of this invention. It is a schematic cross section showing an example of the interruption | blocking state of the junction part in 1st Embodiment of this invention. It is a schematic cross section showing an example of the interruption | blocking state of the junction part in 1st Embodiment of this invention. It is a schematic cross section showing an example of the interruption | blocking state of the junction part in 1st Embodiment of this invention. It is a schematic cross section showing an example of the interruption | blocking state of the junction part in 1st Embodiment of this invention. It is a schematic cross section showing an example of the interruption | blocking state of the junction part in 5th Embodiment of this invention. It is a schematic cross section showing an example of the 4th conductor of the cross | intersection part in 6th Embodiment of this invention. It is a block diagram of the power supply device at the time of installing two junction parts in 7th Embodiment of this invention. It is a block diagram of the high voltage direct current power supply unit which installed the junction part in 9th Embodiment of this invention.

Embodiment 1 FIG.
FIG. 1 is a block diagram of a power supply device according to a first embodiment for carrying out the present invention. First, a power supply device for an electric vehicle or a hybrid vehicle will be described with reference to FIG. The high-voltage DC power supply 10 that is a DC power supply and the inverter 40 are connected by a pair of DC buses. One DC bus of the pair of DC buses is composed of the DC bus 11 and the inverter bus 31, and the other DC bus is the DC bus 12. The DC power output from the high-voltage DC power supply unit 10 is fed to the pair of DC buses 11 and the DC bus 12. One DC bus 11 is connected to the inverter bus 31 at the junction 20, whereby the junction 20 is installed on the line of the DC bus. The inverter 40 converts the DC power supplied from the inverter bus 31 and the other DC bus 12 into AC power corresponding to a torque command signal from a control unit (not shown), and drives the wheels. Supply to machine 50. Note that the DC bus 12 in the vicinity of the inverter 40 is referred to as an inverter bus 32 for convenience of the following description.

  In the vicinity of the inverter 40, a large-capacity smoothing capacitor 60 for the purpose of stabilizing the voltage value of the supplied DC power is connected between the inverter bus 31 and the inverter bus 32. In order to discharge the electric charge of the smoothing capacitor 60, a DC circuit in which a relay 70 and a discharge resistor 80 are connected in series is connected to the inverter bus 31 and the inverter bus 32 at an intermediate position between the junction 20 and the smoothing capacitor 60. Install across.

  The relay 70 includes a switch unit 71 and an electromagnet 72. When no current flows through the electromagnet 72, the switch unit 71 is closed by the internal elastic force, that is, the relay 70 is turned on. On the contrary, when a current flows through the electromagnet 72, the electromagnet 72 causes the switch portion 71 to open against the internal elastic force, that is, the relay 70 is cut off. One terminal of the electromagnet 72 in the relay 70 is connected to the joint portion 20 through the relay control line 73. Further, the other terminal of the electromagnet 72 in the relay 70 is connected to the junction 20 through the relay control line 74 after passing through the low voltage DC power supply 90.

  Next, the structure of the joint part 20 will be described. FIG. 2 is a schematic cross-sectional view showing an embodiment of the joint 20. 2A is a schematic cross-sectional view on the DC bus side of the joint, FIG. 2C is a schematic cross-sectional view on the inverter bus side of the joint, and FIG. 2B is a schematic cross-sectional view of the entire joint. The joint portion 20 includes a first breaking mechanism and a second breaking mechanism, and the first breaking mechanism includes a DC bus 11 that is a first conductor, an inverter bus 31 that is a second conductor, and a DC. It is composed of a third conductor 201 that is a part of a connecting portion described later that connects the bus 11 and the inverter bus 31. The second breaking mechanism is electrically insulated from the DC bus 11 as the first conductor, the inverter bus 31 as the second conductor, and the DC bus 11 and the inverter bus 31. It is composed of a fourth conductor 202 which is a part of an intersecting portion described later that intersects.

  In the joint portion 20, the DC bus 11 includes a first DC bus convex portion 211 and a second DC bus convex portion 212. In the joint portion 20, the inverter bus 31 is positioned so as to face the first DC bus convex portion 211 at a position corresponding to the first DC bus convex portion 211, and is positioned relative to the second DC bus convex portion 212. Respectively have second bus-use convex portions 232 for the inverter. In the joint portion 20, the surface of the DC bus 11 facing the inverter bus 31, the side surface 218 of the first DC bus convex portion 211, and the side surface 219 of the second DC bus convex portion 212 are electrically connected. An insulator 213 is formed by performing an insulation treatment on the substrate. Similarly, at the joint portion 20, the surface of the inverter bus 31 that faces the DC bus 11, the side surface 238 of the first inverter busbar convex portion 231, and the side surface 239 of the second inverter busbar convex portion 232, The insulator 233 that is electrically insulated is formed.

  A hemispherical or substantially hemispherical recess 214 and a recess 234 are respectively provided on surfaces of the first DC bus convex portion 211 and the first inverter bus convex portion 231 facing each other. The inner surface of the recess 214 is in conduction with the DC bus 11. Similarly, the inner surface of the recess 234 is in conduction with the inverter bus 31. By inserting a spherical or substantially spherical third conductor 201 into which the whole or a part can be inserted into the depression 214 and the depression 234 into the gap between the depression 214 and the depression 234, the DC bus 11 and the inverter bus 31 can be connected to each other. Enable energization. Here, the connecting portion is constituted by the first DC bus convex portion 211, the first inverter bus convex portion 231, the recess 214, the recess 234, and the third conductor 201.

  On the other hand, the pores 216 are opened so as to penetrate the DC bus 11 from the surface of the second DC bus convex portion 212 and open at a surface 215 which is the opposite surface of the second DC bus convex portion 212. An electrically insulated insulator 217 is formed on the inner wall of the pore 216, the periphery of the opening of the surface 215, and the periphery of the opening of the second DC bus convex portion 212. Similarly, the pores 236 are formed so as to penetrate the inverter bus bar 31 from the surface of the second inverter bus bar convex portion 232 and open at the surface 235 opposite to the second inverter bus bar convex portion 232. Free. An electrically insulated insulator 237 is formed on the inner wall of the pore 236, the periphery of the opening of the surface 235, and the periphery of the opening of the second inverter bus bar convex portion 232. A fourth conductor 202 that is thin and hard but easily breaks through the fine holes 216 and 236. For example, a needle-like conductor can be considered as the fourth conductor. The end of the fourth conductor 202 on the surface 215 side is connected to the relay control line 73. The end of the fourth conductor 202 on the surface 235 side is connected to the relay control line 74. Here, the intersecting portion includes the second DC bus convex portion 212, the second inverter bus convex portion 232, the pore 216, the pore 236, and the fourth conductor 202.

  Since the junction 20 is generally configured as described above, DC power is supplied from the DC bus 11 to the inverter bus 31 via the third conductor 201. Since current flows through the fourth conductor 202 to the electromagnet 72 in the relay 70, the relay 70 is in an open state.

  Here, the shape of the recess 214, the shape of the recess 234, and the shape of the third conductor 201 are such that when a predetermined external force is applied to the joint portion 20, the third conductor 201 is detached from the recess 214 or the recess 234. The third conductor 201, which is a part of the connection portion, is designed to be out of a predetermined position. In addition, a side surface 218 of the first DC bus bar convex portion 211 and a side surface 238 of the first inverter bus bar convex portion 231 form a step or the like, so that the third conductor 201 is depressed 214 or depressed. It is designed in a shape that does not easily return to 234. Further, the side surface 219 of the second DC bus convex portion 212 and the side surface 239 of the second inverter bus convex portion 232 form a step or the like, and the third conductor 201 cannot easily get over. Design in shape. The predetermined external force is a value of an impact force (impulse) that is assumed when the automobile collides or falls. As places where the impact force is received, various places such as a front face, a side face and a rear face of the automobile can be considered.

  In the joint part 20 designed as described above, an example of a change in the joint part 20 when the automobile collides or falls is explained with reference to schematic cross-sectional views showing an example of a cut-off state of the joint part in FIGS. To do. When the automobile collides or falls, the third conductor 201 contacts the insulator 213 of the DC bus 11 or the insulator 233 of the inverter bus 31 as shown in FIG. 3 to FIG. As shown in FIG. 4, the energization between the DC bus 11 and the inverter bus 31 is interrupted, and the energization is not easily restored.

  At the same time, when the automobile collides or falls, the fourth conductor 202 is located near the contact portion between the second DC bus convex portion 212 and the second inverter bus convex portion 232 in FIGS. 3 to 6. As shown, the DC bus side fourth conductor 202a and the inverter bus side fourth conductor 202b are disconnected, and the conduction between the relay control line 73 and the relay control line 74 is cut off. When the conduction between the relay control line 73 and the relay control line 74 is interrupted, the electromagnet 72 in the relay 70 loses the force that resists the elastic force of the switch unit 71 in the relay 70, and the relay 70 changes to the conduction state. To do.

  When the relay 70 becomes conductive, the smoothing capacitor 60 and the discharge resistor 80 are connected via the relay 70, and power is already supplied from the DC bus 11 to the inverter bus 31 via the third conductor 201. The electric charge stored in the smoothing capacitor 60 that has disappeared is released as heat by the discharge resistor 80.

  As described above, since the joint portion 20 is configured, when an automobile collides or falls, the impact force is used to the inverter 40 or the smoothing capacitor 60 regardless of the existence of functions other than the joint portion 20. The electric charge stored in the smoothing capacitor 60 can be immediately discharged at the same time as the power supply is cut off. Further, the joint portion 20 can be disposed anywhere as long as it is between the high-voltage power supply portion 10 and the smoothing capacitor 60.

  In addition, since the recess 214, the recess 234, and the third conductor 201 have an isotropic shape in which the forces received in the two-dimensional plane are equal, the impact received by the joint 20 when the automobile collides or falls. Regardless of the direction of force, the power supply to the inverter 40 and the smoothing capacitor 60 is cut off, and at the same time, the charge stored in the smoothing capacitor 60 is immediately discharged.

  In the first embodiment, the first blocking mechanism is configured by the depressions and conductors of the convex portion, but the rod-shaped conductors such as the second blocking mechanism are electrically connected to the buses in the holes formed in the respective bus bars. The rod-shaped conductors may be bent by a predetermined external force so that the energization between the buses is interrupted. By configuring the first shut-off mechanism in this way, the shape of this part can be simplified, and the manufacturing cost can be reduced. The same effect can be obtained even if the second blocking mechanism is formed using a spherical conductor similar to the first blocking mechanism.

Embodiment 2. FIG.
In the first embodiment, a pair of first DC bus convex portion 211, first inverter bus convex portion 231 and third conductor 201 are formed in the joint portion 20 by one each. Although described so as to supply DC power only by the connection part, a plurality of pairs of connection parts, that is, a plurality of pairs of first DC bus convex parts, a first inverter bus convex part, and a third conductor The joint 20 may be configured.

  In the second embodiment, when the predetermined external force described in the first embodiment is applied to the joint 20, the third conductor 201 is protruded from the first DC bus at all the joints of the joint 20. The shape of each of the recesses and the shape of the third conductor are designed so as to deviate from the recesses 231 of the shape part or the recesses 231 of the first inverter bus bar convex part.

  By configuring the joint portion 20 in this manner, when an automobile collides or falls, regardless of the existence of functions other than the joint portion 20, the impact force is used to supply power to the inverter 40 and the smoothing capacitor 60. At the same time, the electric charge stored in the smoothing capacitor 60 can be immediately discharged, the contact resistance can be reduced, and the power consumption at the junction 20 can be reduced. The power supply unit 10 can be downsized or the travel distance of the automobile can be extended.

  In addition, the amount of current from the DC bus 11 to the inverter bus 31 can be increased, and a large torque can be generated in the rotating machine 50 or the rotating machine 50 can be rotated at high speed. In addition, since the power consumption at the junction 20 can be reduced, the amount of heat generated at the junction 20 can be reduced, and the junction 20 can be downsized. Furthermore, the presence of a plurality of connecting portions also has an effect of improving the reliability of power supply from the DC bus 11 to the inverter bus 31.

Embodiment 3 FIG.
In the first to second embodiments, the first DC bus convex portion 211 has a recess 214 and a third conductor 201, or the first inverter convex portion 231 has a recess 234 and a first recess. Although the third conductor 201 is described as being in direct contact with the third conductor 201, a conductive paste may be applied to the recesses 214 to 234, or a conductive paste may be applied to the surface of the third conductor 201.

  By configuring the joint portion 20 in this manner, when an automobile collides or falls, regardless of the existence of functions other than the joint portion 20, the impact force is used to supply power to the inverter 40 and the smoothing capacitor 60. Is not only allowed to immediately discharge the electric charge stored in the smoothing capacitor 60, but also between the depression 214 and the third conductor 201 or between the depression 234 and the third conductor 201. It is possible to reduce the contact resistance between them and reduce the power consumption at the junction 20, thereby enabling the high-voltage DC power supply unit 10 to be downsized or the travel distance of the automobile to be extended.

  In addition, since the power consumption at the junction 20 can be reduced, the amount of heat generated at the junction 20 can be reduced, and the junction 20 can be downsized. Further, due to the presence of paste whose shape is deformed, there is an effect of improving the reliability of power supply from the DC bus 11 to the inverter bus 31.

Embodiment 4 FIG.
In the first to third embodiments, the shape of the third conductor 201 is described as a spherical shape or a substantially spherical shape. However, the shape of the third conductor 201 is described in the first embodiment or the second embodiment. When a predetermined external force is applied to the joint 20, the third conductor 201 is removed from the recess 214 of the first DC bus convex portion 211 or the recess 234 of the first inverter convex portion 231, or Sometimes polyhedral. At this time, the shape of the recess 214 and the shape of the recess 234 are designed in accordance with the shape of the ellipsoid or polyhedron of the third conductor 201.

  By configuring the joint portion 20 in this manner, when an automobile collides or falls, regardless of the existence of functions other than the joint portion 20, the impact force is used to supply power to the inverter 40 and the smoothing capacitor 60. Is not only allowed to immediately discharge the electric charge stored in the smoothing capacitor 60, but also between the depression 214 and the third conductor 201 or between the depression 234 and the third conductor 201. The contact area can be increased, so that the contact resistance can be reduced to reduce the power consumption at the junction 20, and the high-voltage DC power supply 10 can be downsized or the travel distance of the automobile can be extended. . In addition, since the power consumption at the junction 20 can be reduced, the amount of heat generated at the junction 20 can be reduced, and the junction 20 can be downsized.

Embodiment 5 FIG.
FIG. 7 is a schematic cross-sectional view showing an example of a cut-off state of the joint portion when the third conductor is integrated with either the DC bus convex portion or the inverter convex portion. As can be seen from FIG. 7, the third conductor 201 is formed integrally with one of the recess 214 of the first DC bus convex portion 211 or the recess 234 of the first inverter convex portion 231. The protrusion 240 may be used.

  By configuring the joint portion 20 in this manner, when an automobile collides or falls, regardless of the existence of functions other than the joint portion 20, the impact force is used to supply power to the inverter 40 and the smoothing capacitor 60. At the same time, it is possible not only to immediately discharge the electric charge stored in the smoothing capacitor 60, but also to reduce the number of parts, and it is possible to reduce material costs and processing costs. Further, as in the second embodiment, the connection part of the first blocking mechanism may be constituted by a plurality of pairs of connection parts, and a conductive paste is applied to the connection part as in the third embodiment. Furthermore, the shape of the protrusion 240 may be an ellipsoid or a polyhedron as in the fourth embodiment. With this configuration, it is possible to reduce the contact resistance at the connection portion and reduce the power consumption at the joint portion 20, thereby reducing the size of the high-voltage DC power supply portion 10 or extending the travel distance of the automobile. It becomes possible.

Embodiment 6 FIG.
As shown in FIG. 3 to FIG. 6, the fourth conductor 202 of the second breaking mechanism is connected to the DC bus side fourth conductor 202a and the inverter bus side fourth conductor 202b by the collision or overturn of the automobile. As described above, the DC bus-side fourth conductor 202a and the inverter bus-side fourth conductor 202b are originally composed of the second DC bus-bar convex portion 212 and the second inverter bus-bar convex portion. When a predetermined external force is applied due to a collision or a fall of an automobile, for example, as shown in FIGS. The connecting portion 20 may be configured such that the contact (meshing) between the fourth conductor 202a and the inverter bus-bar side fourth conductor 202b is disconnected and electrical conduction is interrupted.

  By configuring the joint portion 20 in this manner, when an automobile collides or falls, regardless of the existence of functions other than the joint portion 20, the impact force is used to supply power to the inverter 40 and the smoothing capacitor 60. In addition to allowing the electric charge stored in the smoothing capacitor 60 to be discharged immediately, the pores 216 formed in the DC bus 11 with the fourth conductor 202, which is a long and easy-to-break needle-shaped conductor, can be used. In addition, since the work of penetrating through the fine holes 236 formed in the inverter bus 31 is eliminated, the machining cost can be reduced. In addition, since the fourth conductor 202 is not broken when the fourth conductor 202 is inserted into the pore 216 and the pore 236, the material cost can be reduced.

Embodiment 7 FIG.
In the first to sixth embodiments, the joint portion 20 is installed only between the inverter bus 31 that is one power supply end of the inverter 40 and the DC bus 11, and the other power supply end of the inverter 40 is used. The case where a certain inverter bus 32 is integrated with the DC bus 12 has been described.

  However, in the present embodiment, the first joint 20 is installed between the DC bus 11 and the inverter bus 31 as in the first to sixth embodiments, and another second joint. The case where 21 is also installed between the DC bus 12 and the inverter bus 32 will be described with reference to FIG. In addition, the 1st junction part 20 and the 2nd junction part 21 are the same means as the junction part 20 demonstrated so far. However, the two relay control lines of the second joint portion 21 are described as a relay control line 75 and a relay control line 76. 9, parts having the same functions as those in FIG. 1 are denoted by the same reference numerals.

  In the present embodiment, one relay control line 73 of the first joint portion 20 is connected to one terminal of the electromagnet 72 in the relay 70 as described above. However, the other relay control line 74 of the first joint 20 is connected to one relay control line 75 of the second joint 21. The other relay connection line 76 of the second joint portion 21 is connected to the other terminal of the electromagnet 72 in the relay 70 via the low-voltage DC power supply 90.

  By configuring the power supply device in this way, when the automobile collides or falls, at least one of the first joint 20 and the second joint 21 is cut off from the power supply and conducted by the fourth conductor 202. When the interruption is performed, DC power is no longer supplied to the inverter 40 and the smoothing capacitor 60, and the electric charge stored in the smoothing capacitor 60 is released through the discharge resistor 80.

  By installing joints on both of the buses for the inverter, when the automobile collides or falls, regardless of the presence or absence of functions other than the joint 20, the impact force is used to drive the inverter 40 and the smoothing capacitor 60. The electric power stored in the smoothing capacitor 60 can be discharged immediately as well as the power supply to the smoothing capacitor 60 is cut off, and more reliable means is provided by increasing the means for cutting off the power to the inverter and releasing the electric charge of the smoothing capacitor. It is possible to implement power interruption and charge release. Further, by installing a plurality of joints, it is possible to cope with the directionality of impact such as the vertical direction and the horizontal direction.

Embodiment 8 FIG.
In the first embodiment, the fourth conductor 202 of the second blocking mechanism is inserted into the pore 216 and the pore 236 formed in the DC bus 11 and the inverter bus 31. In the sixth embodiment, the DC bus side fourth conductor 202a is inserted into the pore 216 of the DC bus 11, and the inverter bus side fourth conductor 202b is inserted into the pore 236 of the inverter bus 31. .

  However, even if the fourth conductor 202 is insulated and bonded to the DC bus 11 and the inverter bus 31 on the side surfaces of the DC bus 11 and the inverter bus 31, a predetermined external force is applied to the joint 20. In this case, the fourth conductor 202 is broken, so that the relay 70 is moved to the closed state, and the electric charge stored in the smoothing capacitor 60 can be released.

  Similarly, the DC bus side fourth conductor 202a is insulated and bonded to the side surface of the DC bus 11, and the inverter bus side fourth conductor 202b is connected to the DC bus side fourth conductor 202a. Even if the DC bus side fourth conductor 202a and the inverter bus side fourth conductor 202b are bonded so as to be insulative to the side surface of 31 and a predetermined external force is applied to the joint portion 20, The continuity between the DC bus side fourth conductor 202a and the inverter bus side fourth conductor 202b is cut off, and the relay 70 shifts to the closed state to release the charge stored in the smoothing capacitor 60. Can do.

  By configuring the joint portion 20 in this manner, when an automobile collides or falls, regardless of the existence of functions other than the joint portion 20, the impact force is used to supply power to the inverter 40 and the smoothing capacitor 60. The fourth conductor 202, which is a long and easy-to-break needle-shaped conductor, and the DC bus side fourth conductor 202a, Since there is no work for penetrating the inverter bus-bar side fourth conductor 202b, the processing cost can be reduced, and the material cost can be reduced because it does not break and pass through.

Embodiment 9 FIG.
The high-voltage DC power supply unit 10 is more efficient to increase the voltage than to increase the current when supplying DC power to the inverter 40. Therefore, as shown in FIG. 10, the high-voltage DC power supply unit 10 boosts the voltage of the output of the driving power supply 101 configured by a fuel cell, a storage battery, or the like by the boost converter 102, and outputs the output of the boost converter 102 to the output line 103 104, and an output capacitor 105 is installed across the output lines 103, 104 for the purpose of stabilizing the output of the boost converter 102. Both ends of the output capacitor 105 are connected to the DC buses 11, 12. Configured as follows.

  However, in the present embodiment, as shown in FIG. 10, the same junction 120 as the junction 20 described in the first to eighth embodiments is used as one output between the boost converter 102 and the output capacitor 105. The relay 170 inserted into the line 103 and installed on the line of the DC bus 11 has the same function as the relay 70 described in the first embodiment and the relay 170 described in the first embodiment. A DC circuit having a discharge resistor 180 connected in series straddles the output lines 103 and 104 at an intermediate position between the junction 120 and the output capacitor 105, or between the output capacitor 105 and the DC buses 11 and 12. Furthermore, one terminal of the electromagnet 172 in the relay 170 is connected to the junction 120 through the relay control line 173, and the electromagnetic in the relay 170 The other terminal of 172 is configured to be connected to the junction 120 through the relay control line 174 after passing through the low-voltage DC power supply 190 having the same function as the low-voltage DC power supply 90 described in the first embodiment. .

  The connection at the junction 120 between the relay control line 173 and the relay control line 174 is the same as the connection at the junction 20 between the relay control line 73 and the relay control line 74 described in the first embodiment. However, the discharge resistor 180 needs to have a power consumption capability that can withstand the discharge of the electric charge stored in both the output capacitor 105 and the smoothing capacitor 60.

  As described above, since the high-voltage DC power supply unit 10 is configured, when an automobile collides or falls, regardless of the existence of functions other than the high-voltage power supply DC unit 10, the impact force is used to output an output capacitor. The electric power stored in the output capacitor 105 and the smoothing capacitor 60 can be immediately discharged at the same time as the power supply to the 105, the inverter 40 and the smoothing capacitor 60 is cut off.

  Further, since the high-voltage DC power supply unit 10 is often installed at a location away from the inverter 40 and the smoothing capacitor 60, even when an impact force acts only on the high-voltage DC power supply unit when the automobile collides or falls. Thus, it is possible to reliably cut off the power supply to the inverter 40 and release the electric charge stored in the smoothing capacitor 60.

  When the high-voltage DC power supply unit 10 according to the present embodiment is also applied to the first to eighth embodiments, the discharge resistor 80 described in the first to eighth embodiments includes an output resistor. It is necessary to have a power consumption capability that can withstand the discharge of the electric charge stored in both the capacitor 105 and the smoothing capacitor 60.

  Furthermore, as in the case described in the seventh embodiment, another junction 121 may be inserted into the output line 104 between the boost converter 102 and the output capacitor 105. In this case, the structure for releasing the electric charge of the output capacitor 105 is the same as the structure for releasing the electric charge of the smoothing capacitor 60 in the seventh embodiment.

  DESCRIPTION OF SYMBOLS 10 High voltage DC power supply part, 11, 12 DC bus line, 20, 120 junction part, 21 2nd junction part, 31, 32 Bus line for inverter, 40 Inverter, 50 Rotating machine, 60 Smoothing capacitor, 70, 170 Relay, 71, 171 Switch section, 72, 172 Electromagnet, 73, 74, 75, 76, 173, 174 Relay control line, 80, 180 Discharge resistance, 90, 190 Low voltage DC power supply, 101 Driving power supply, 102 Boost converter, 103, 104 output Line, 105 output capacitor, 201 third conductor, 202 fourth conductor, 202a DC bus side fourth conductor, 202b inverter bus side fourth conductor, 211 first DC bus convex part, 212 2 DC bus convex portions, 213, 217, 233, 237 insulator, 214 of the first DC bus convex portions Indentation, 215 Opposite surface of second DC bus convex portion, 216, 236 pore, 218 Side surface of first DC bus convex portion, 219 Side surface of second DC bus convex portion, 231 First inverter Bus convex part for bus 232 Second convex part for bus bar for inverter 234 Depression of convex part for bus bar for first inverter 235 Opposite face of convex part for bus bar for second inverter 238 For first inverter Side surface of the bus bar convex portion, 239 Side surface of the second bus bar convex portion for the inverter, 240 Projecting portion that integrally constitutes the third conductor and the recess.

Claims (11)

DC power supply,
An inverter that converts the DC power input from the DC power source into AC power to drive the rotating machine;
A pair of DC buses connecting the DC power supply and the inverter;
A smoothing capacitor connected in parallel to the inverter between the pair of DC buses;
A series circuit connected in parallel to the smoothing capacitor, in which a relay and a resistor are connected in series;
A power supply device comprising a joint installed on the line of the DC bus,
The joint is
When a predetermined external force is applied, a second interrupting mechanism that interrupts the conduction of the DC bus is provided, and the second capacitor is discharged by the resistor by closing the relay. have a cut-off mechanism,
A first conductor connected to the DC bus on the DC power supply side;
A second conductor facing the first conductor and connected to the DC bus on the inverter side;
The first blocking mechanism is composed of the first conductor, the second conductor, and a connection portion that connects the first conductor and the second conductor,
The second blocking mechanism crosses the first conductor, the second conductor, and the first conductor and the second conductor in an electrically insulated state, and is connected to the series circuit. Composed of intersections to be
When the predetermined external force is applied, the first blocking mechanism is configured such that the connection portion is disconnected from a predetermined position to block conduction of the DC bus, and
The power supply apparatus according to claim 2, wherein the second shut-off mechanism cuts off the intersection and closes the relay . In the first blocking mechanism,
The connecting portion has a convex portion at a position where the first conductor and the second conductor face each other,
A recess is provided in each of the opposing surfaces of the two convex portions,
At least one of the opposing surfaces of the first conductor and the second conductor and the side surfaces of the two convex portions are insulated.
All or part of the first conductor is inserted into a gap between the depression of the convex portion of the first conductor and the depression of the convex portion of the second conductor, and the first conductor and the second conductor are in a conductive state. Composed of a third conductor,
When the predetermined external force is applied, the third conductor, two of said recesses power supply device according to claim 1, wherein the outside from at least one of. The power supply device according to claim 2 , wherein the shape of the recess is hemispherical or substantially hemispherical. Each of the convex portions forms a step with respect to the first conductor and the second conductor,
When the predetermined external force is applied, the third conductor, two of said recesses power supply device according to claim 2 or claim 3, wherein the does not return to the recess deviates from at least one of. The third shape of the conductor, spherical, power supply of any one of claims 2 to 4, characterized in that an oval body or polyhedral. In the first blocking mechanism,
The connecting portion has a convex portion at a position where the first conductor and the second conductor face each other,
One of the opposing surfaces of the two convex portions is provided with a recess, and
The other is provided with a protruding portion protruding from the surface of the protruding portion,
At least one of the opposing surfaces of the first conductor and the second conductor and the side surfaces of the two convex portions are insulated.
Holding the first conductor and the second conductor in a conductive state by meshing the depression and the protrusion,
Said predetermined when an external force is applied, the power supply device according to claim 1, wherein the mesh combined with the recess and the connecting portion is disengaged. The shape of the depression is hemispherical or substantially hemispherical, and
The power supply device according to claim 6 , wherein a shape of the protruding portion is hemispherical or substantially hemispherical. In the second blocking mechanism,
The intersecting portion is provided with holes at positions where the first conductor and the second conductor face each other, and an insulating treatment is performed on the inside of the hole and the periphery of the opening of the hole,
A fourth conductor penetrating each of the holes;
Holding the relay in an open state by connecting both ends of the fourth conductor and both ends of a relay control line for controlling the relay,
8. The relay according to any one of claims 1 to 7 , wherein when the predetermined external force is applied, the fourth conductor is cut and the conduction to the relay is interrupted to close the relay. The power supply device according to claim 1. In the second blocking mechanism,
The fourth conductor is a connection of two or more conductors,
When the predetermined external force is applied,
9. The power supply device according to claim 8, wherein the two or more conductors are brought into non-contact, and the relay is closed when conduction to the relay is interrupted. In the second blocking mechanism,
The intersecting portion is configured by performing an insulation treatment on each side surface of the first conductor and the second conductor, and fixing a fourth conductor on each side surface,
Holding the relay by connecting to the fourth ruri rate control line to control the relay each conductor ends of the open state,
8. The relay according to any one of claims 1 to 7 , wherein when the predetermined external force is applied, the fourth conductor is cut and the conduction to the relay is interrupted to close the relay. The power supply device according to claim 1. In the second blocking mechanism,
The fourth conductor is a connection of two conductors, one of the two conductors is fixed to the side of the first conductor,
Fixing the other to the side of the second conductor;
11. The power supply device according to claim 10 , wherein when the predetermined external force is applied, the two conductors are not in contact with each other, and the relay is closed by disconnecting conduction to the relay.