JP5196240B2 - High voltage equipment - Google Patents

Description

The present invention relates to a high voltage apparatus that can safely perform maintenance and inspection of high voltage equipment mounted on a vehicle.

  Hybrid vehicles and electric vehicles contain high-voltage devices such as inverters and converters housed in housings. When maintaining and inspecting high-voltage equipment, sufficient safety measures are necessary to ensure safety against high voltages.

Conventionally, for example, a high-voltage device is known in which a connector cover extending from an upper lid of a housing that accommodates a high-voltage device covers the output connector (see Patent Document 1). In this conventional high voltage device, it is difficult to touch the output connector unless the upper cover is opened. An interlock switch that detects opening and closing is provided on the upper lid. When the upper lid is opened, the interlock is applied, and safety is ensured even if the output connector is touched.
JP-A-2005-143200

  In the conventional high voltage device, the output connector cannot be touched from above with the upper lid closed (interlock is released), but it is dangerous because it can be touched from the side or from below. The input connector can be touched regardless of whether the upper lid is opened or closed. When the top cover is closed, the interlock is not applied, and it is dangerous to touch the input connector in that state. Also, when the input connector is removed, maintenance and inspection of the high-voltage equipment is performed, and when the work is finished and the upper lid is closed, the interlock is removed and the input connector is energized. That is, even when the input connector is disconnected, it is energized, which is very dangerous.

  The present invention has been made in view of the above problems, and an object thereof is to provide a high-voltage device that can be safely assembled, maintained, and inspected.

The high voltage device according to the present invention includes a high voltage device, a housing that houses the high voltage device, an opening / closing means that opens and closes at least a part of the housing, and the high voltage device that is electrically connected to the high voltage device. a relay member which is disposed within the housing, the opening and closing of the connection means and said switching means is fixed to the relay board said is detachably attached to the relay member connecting the high voltage equipment and external equipment electrically In response to the open / close detection means and / or the attachment / detachment detection means, the high-voltage unit comprising: an opening / closing detection means for detecting and changing means for changing the electrical intermittently with high voltage equipment and the external equipment, has a, wherein the housing is provided with an opening which allows to connect the connecting means to the relay member, the The change means is the open / close detection means Only when the and the detachment detection means detects the closing has been detected wear is characterized by performing the electrical connection between the external device and the high-voltage equipment.

  In the high voltage device, the connection means may be an input connector for supplying power from the external device to the high voltage device.

  The open / close detection means and the attachment / detachment detection means may be interlock switches connected in series with each other.

  The high voltage device according to the present invention includes an open / close detection means for detecting opening / closing of the open / close means, an attachment / detachment detection means for detecting attachment / detachment of the connection means, and a high voltage device in response to the opening / closing detection means and / or the attachment / detachment detection means Change means for changing the electrical connection with the external device, so that the attachment / detachment detection means detects attachment / detachment even if the connection means is touched and attached while the opening / closing means is closed. Interlock is applied (the power is cut off) and it is safe. Further, when the connection means is disconnected, the interlock is applied even when the opening / closing means is closed, which is safe. Furthermore, since the open / close detection means and the attachment / detachment detection means are fixed to the same relay member, the wiring connecting both the detection means and the change means can be shortened. As a result, it is possible to reduce the number of wiring assembly steps, reduce the handling space, and improve the noise resistance.

  If the connection means is an input connector, the input connector can be removed to perform maintenance and inspection of the high-voltage equipment, and the interlock can be applied even if the open / close means is closed with the input connector removed after the work is finished. As a result, the disconnected input connector is not energized and is safe.

  When the open / close detection means and the attachment / detachment detection means are interlock switches connected in series with each other, a logic that releases the interlock only when both of the switches are turned on and applies the interlock when one of the switches is off, can do. As a result, the logic is simple and the reliability is improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  (Embodiment 1) FIG. 1 shows a block diagram of a vehicle equipped with a high voltage device (inverter device) of this embodiment. The inverter device 1 according to the present embodiment includes an inverter unit (high voltage unit) 2 and a changing unit 3 having a system main relay (SMR) 32 and an electronic control unit (HV-ECU) 31.

  This vehicle is a hybrid vehicle equipped with an engine and a motor, and a driving motor is mounted on the front side and the rear side, and is driven by electric power supplied from a secondary battery. This vehicle includes a secondary battery 100 such as a nickel metal hydride battery, a front motor generator (FMG) 700 and a rear motor generator (RMG) 800 that are electric motors for traveling, and a starter generator (STG) for starting the engine. 900 and the inverter unit 2 that supplies electric power to the motor generators 700 and 800 and the starter generator 900. The HV-ECU 31 controls the SMR 32 in conjunction with the interlock switches 24 and 26 arranged on the input terminal block 23a.

  The FMG 700 is connected to the front wheel drive shaft of the vehicle, and drives the front wheels with electric power supplied from the secondary battery 100 via the inverter unit 2 or is driven by the front wheels to perform regenerative power generation. The RMG 800 is connected to the rear wheel drive shaft of the vehicle, and drives the rear wheels with the electric power supplied from the secondary battery 100 via the inverter unit 2 or is driven by the rear wheels to perform regenerative power generation. The regenerated power is used to charge the secondary battery 100.

  The STG 900 has both a starter motor function and an alternator function. The engine is started during intermittent operation of the engine, and power generation assistance by the FMG 700 is performed.

  As will be described in detail later, the SMR 32 cuts off power supply from the secondary battery 100 to the inverter unit 2 based on a control signal from the HV-ECU 31.

  Note that a PCU (Power Control Unit) may be used instead of the inverter unit 2 of the present embodiment, and this PCU has high-voltage devices such as an inverter and a converter.

  The secondary battery 100 and the inverter unit 2 are connected by a single-phase power cable via the input connector 25a. Inverter unit 2 and FMG700, RMG800, and STG900 are connected by a three-phase power cable via output connectors 25b to 25d.

  In FIG. 2, schematic structure of the inverter unit 2 in the inverter apparatus 1 of this embodiment is shown. 2A is a top view with the service cover 22b of the housing 22 accommodating the high-voltage device (inverter) 21 removed, and FIG. 2B is an end view taken along the line AA in FIG. 2A.

  As shown in FIG. 2, the high voltage unit 2 has a structure in which an inverter (high voltage device) 21 is accommodated in a box portion 22a of a housing 22 and covered with a service cover 22b. A lid-like service cover 22b is fixed to the box portion 22a of the housing 22 with screws (not shown).

  An input terminal block (relay member) 23a for electrically relaying the inverter 21 and the secondary battery 100 to the right end portion of the box portion 22a, and the inverter 21, the motor generators 700 and 800, and the starter generator 900 on the left side thereof. Electrically relayed output terminal blocks 23b are respectively arranged.

  An input terminal 231a electrically connected to the inverter 21 is embedded in the input terminal block 23a. An input plug 251a of an input connector 25a that is electrically connected to the secondary battery 100 via the SMR 32 is fixed to the input terminal 231a with a bolt 252a. The input terminal block 23a has an upward concave portion 24b with which a convex portion 24a of an open / close interlock switch (open / close detecting means) 24 whose one end is fixed to the service cover 22b is engaged. Furthermore, the input terminal block 23a has a laterally-facing concave portion 26b with which a convex portion 26a of a detachable interlock switch (detachment detecting means) 26 whose one end is fixed to the input connector 25a is engaged.

  W1 to W5 are wirings for electrically connecting the open / close interlock switch 24 and the detachable interlock switch 26 to the HV-ECU 31, and the end portions form contact points. When the service cover 22b is fixed to the box portion 22a, the convex portion 24a of the open / close interlock switch 24 is fitted into the concave portion 24b of the input terminal block 23a, and the wirings W1 and W3 on the input terminal block 23a side are connected to the open / close interlock switch. 24 wirings W2 are connected. When the input plug 251a of the input connector 25a is fixed to the input terminal 231a of the input terminal block 23a, the convex portion 26a of the detachable interlock switch 26 is fitted into the concave portion 26b of the input terminal block 23a, and the input terminal block 23a side. The wires W3 and W5 are connected by the wire W4 of the removable interlock switch 26. Therefore, in the inverter device of this embodiment, the open / close interlock switch 24 and the detachable interlock switch 26 are connected in series. The wirings W1 and W5 are connected to the HV-ECU 31, and the HV-ECU 31 is connected to the SMR 32 as shown in FIG.

  Three sets of three output terminals 231b electrically connected to the inverter 21 are fixed to the output terminal block 23b. And the output plug 251b of the output connector 25b electrically connected to FMG700 is being fixed to the left output terminal 231b with the volt | bolt 252b. Further, an output plug 251c of an output connector 25c electrically connected to the RMG 800 is fixed to the middle output terminal 231b by a bolt 252c. Similarly, an output plug 251d of an output connector 25d that is electrically connected to the SMG 900 is fixed to the right output terminal 231b with a bolt 252d.

  Next, the interlock operation process will be described with reference to FIG. In step S100, the HV-ECU 31 determines whether the open / close interlock switch 24 and the detachable interlock switch 26 are ON (the input connector 25a is attached and the service cover 22b is fixed) or OFF (the input connector 25a and / or the service cover 22b are connected). To see if it is off). If it is ON (Yes in S100), the process proceeds to S200, and if it is OFF (No in S100), the process proceeds to S300.

  In S200, HV-ECU 31 outputs a power supply instruction to SMR 32 to turn on SMR 32. Thereafter, the process returns to S100.

  In S300, HV-ECU 31 outputs a power supply cutoff instruction to SMR 32 to turn off SMR 32. Thereafter, the process returns to S100.

  In the inverter device 1 according to the present embodiment, as described above, the input plug 251a and the output plugs 251b to 251d are fixed to the input terminal 231a and the output terminal 231b with the bolts 252a and 252b to 252d, respectively. Unless the connector 22b is opened, the input connector 25a and the output connectors 25b to 25d cannot be removed, which is safe.

  When the service cover 22b is opened, the open / close interlock switch 24 operates to cut off the power supply, so that the input connector 25a and the output connectors 25b to 25d can be safely removed.

  In addition, when the input connector 25a is disconnected, the detachable interlock switch 26 operates to cut off the power supply even when the service cover 22 is closed. Therefore, even if the input connector 25a is removed during maintenance or inspection of the inverter device 1, there is no mounting error, and the safety is doubled.

  Further, since the two interlock switches 24 and 26 are mounted on the input terminal block 23a, the wirings W1 to W5 can be shortened. As a result, it is possible to reduce the number of wiring assembly steps, reduce the handling space, and improve the noise resistance.

  In addition, since the two interlock switches 24 and 26 are connected in series, the interlock is released only when both the switches 24 and 26 are turned on, and the interlock is applied when either one is turned off. The logic is simple and the reliability is improved.

  (Embodiment 2) The high voltage apparatus of this embodiment is almost the same as that of Embodiment 1. The same elements are denoted by the same reference numerals, and description thereof is omitted. FIG. 4 shows a schematic configuration of the inverter unit 2 of the present embodiment. 4A is a top view in which the service cover 22b of the housing 22 that accommodates the inverter 21 is removed, and FIG. 4B is an end view of a cross section taken along line BB in FIG. 4A.

  The inverter unit 2 according to the present embodiment is different from the first embodiment in that the input plug 251e of the input connector 25e is inserted into the input terminal 232a of the input terminal block 23a. That is, in the first embodiment, the input plug is fixed to the input terminal with a bolt, whereas in this embodiment, the input terminal 232a fixed to the input terminal base 23a has a recess into which the input plug 251e is inserted. The input plug 251e is inserted into the recess.

  Therefore, in the inverter device of the present embodiment, the input connector 25e can be removed even when the service cover 22b is closed, but the detachable interlock switch 26 works and is safe. That is, when the service cover 22b is closed and the input connector 25e is attached, when the input connector 25e is moved to the left in FIG. Since the interlock moves away from the contact point of the recess 26b, the supply of power to the input connector 25e is interrupted.

It is a block diagram which shows the power train of the vehicle by which the inverter apparatus of Embodiment 1 is mounted. It is a schematic block diagram of the inverter unit in the inverter apparatus of Embodiment 1. 3 is a flowchart illustrating an interlock operation in the inverter device according to the first embodiment. It is a schematic block diagram of the inverter unit in the inverter apparatus of Embodiment 2.

Explanation of symbols

1 ... Inverter device (high voltage device)
2 .... Inverter unit (high voltage unit)
21 ・ ・ ・ ・ ・ ・ ・ Inverter (high voltage equipment)
22 .... Case 22b ... Service cover (opening / closing means)
23a ... Input terminal block (relay member)
24 ... Open / close interlock switch (open / close detection means)
25a ... Input connector (connecting means)
26 ... Detachable interlock switch (detachment detection means)
3 ………… Change means

Claims (3)

High voltage equipment,
A housing for housing the high-voltage device;
Opening and closing means for opening and closing at least a part of the housing;
A relay member electrically connected to the high-voltage device and disposed in the housing;
And connecting means for electrically connecting the the external equipment said high-voltage equipment is detachably mounted on the relay member,
Open / close detecting means fixed to the relay member and detecting opening / closing of the open / close means;
A high voltage unit having a detachment detecting means fixed to the relay member and detecting detachment of the connection means;
In response to the open / close detection means and / or the attachment / detachment detection means, a change means for changing electrical interruption between the high voltage device and the external device ,
The housing includes an opening that allows the connection means to be connected to the relay member ;
The changing means performs the electrical connection between the high-voltage device and the external device only when the open / close detection means detects closing and the attachment / detachment detection means detects wearing. apparatus.   The high-voltage device according to claim 1, wherein the connection means is an input connector that supplies power from the external device to the high-voltage device.   The high-voltage device according to claim 1 or 2, wherein the open / close detection unit and the attachment / detachment detection unit are interlock switches connected in series with each other.

Images