JPH07212903A - Body structure of electric vehicle - Google Patents

Abstract

(57) [Summary] When maintaining and inspecting breaker devices and high-voltage electrical equipment,
(EN) Provided is an electric vehicle body structure excellent in workability, which can inevitably stop the supply of a high-voltage drive power source when a maintenance lid is removed. [Construction] A switch cover SC in which a breaker device 3 and a high-voltage electrical system device 5 are arranged in a rear floor Rf and covered with a maintenance lid L3 and a lid L _X to form a closed space, and which is formed integrally with the maintenance lid L3. When the lid mounting portion 8A is provided on the bottom of the, and the position where the switch bracket 9 for fixing the switch cover SC and the lid mounting portion 8A are in contact with each other is fixed with the bolt B _X , and the breaker switch S is operated to the ON side (shown by the broken line), A body structure of an electric vehicle in which a bolt B _X is located below the breaker switch S and the bolt B _X cannot be removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to maintenance and inspection of breaker devices and high-voltage electrical system devices for electric vehicles.
The present invention relates to a vehicle body structure of an electric vehicle that can mechanically and electrically shut off a high-voltage driving power source.

[0002]

2. Description of the Related Art In a conventional vehicle body structure of an electric vehicle, a breaker device and a high-voltage electrical system device are arranged in a space isolated from a passenger compartment and a luggage compartment, covered with a maintenance lid, and housed in a closed space. Things are known.

In the conventional vehicle body structure of an electric vehicle, a maintenance lid is opened at the time of maintenance and inspection of a breaker device and a high-voltage electrical system device of the electric vehicle. For example, a manual breaker switch is operated to operate the breaker device. After the power supply for voltage driving is cut off, maintenance and inspection of the high voltage electrical equipment are performed.

FIG. 8 is a block diagram of a conventional electric vehicle body structure. In FIG. 8, the electric vehicle is a battery box 2 that houses a plurality of batteries (not shown) and a breaker device 3.
Is mounted on the vehicle body from the bottom plate of the vehicle body, and the breaker device 3 has the operation portion of the breaker switch S, the attachment portion of the output cable 2B for supplying the high-voltage driving power source, and the like arranged in the rear floor Rf.

A high-voltage driving power source (for example, 240V) for the battery box 2 is supplied to the breaker device 3 via the input cable 2A and output to the junction box 4 via the output cable 2B. A high-voltage drive power supply is supplied from the junction box 4 to the high-voltage electrical equipment system 5 via a connection cable (not shown), and the high-voltage electrical equipment system 5 drives a motor or the like. Further, the breaker device 3 outputs the high voltage driving power source to the output cable 2B when it is turned on by manually operating the breaker switch S, and shuts off the high voltage driving power source when it is turned off so that the output cable 2B does not generate. Operate.

For mounting the battery box 2 on the vehicle body,
When removing, or when maintaining or inspecting the breaker device 3 with the battery box 2 attached to the vehicle body, or when maintaining or inspecting the high-voltage electrical equipment 5, the power supply for high-voltage drive is stopped. Required to do.

When performing such work, first, the rear seat cushion 6 is removed, and then the maintenance lid L1.
Since the breaker device 3 appears when the switch is removed, the supply of the high-voltage drive power is forcibly stopped by opening the switch cover SC and operating the breaker switch S in the off state.

In this state, maintenance and inspection work of the high-voltage electrical equipment 5 can be performed, or the output cable 2B can be removed from the breaker device 3 to check the breaker device 3 alone, or the battery box 2 can be removed and installed. . Further, the maintenance lid L2 can be removed to perform maintenance and inspection work on the junction box 4.

[0009]

In the conventional vehicle body structure of an electric vehicle, the breaker switch S must be intentionally operated in the off state, and it is assumed that the breaker switch S may be forgotten to be turned off.

The present invention has been made to solve such a problem, and its object is to remove the maintenance lid unless the breaker switch is turned off at the time of maintenance or inspection of the breaker device or the high-voltage electrical system device. An object of the present invention is to provide a body structure of an electric vehicle or a body structure of an electric vehicle in which a breaker device operates without fail when a maintenance lid is removed.

[0011]

In order to solve the above-mentioned problems, a vehicle body structure of an electric vehicle according to the present invention is provided with a maintenance lid only when a manual breaker switch provided in a breaker device is in an off state. The present invention is characterized in that a lid mounting portion is provided on which the mounting lid can be mounted and removed.

Further, the vehicle body structure of the electric vehicle according to the present invention includes an opening / closing sensor for detecting opening / closing of the maintenance lid,
The breaker device that controls the supply and cutoff of the high-voltage drive power supply based on the sensor signal detected by the open / close sensor is operated to cut off the supply of the high-voltage drive power supply to the high-voltage electrical equipment. To do.

[0013]

In the vehicle body structure of the electric vehicle according to the first aspect of the present invention, the maintenance lid is provided with the lid mounting portion, and the maintenance lid can be removed after the breaker switch is turned off.
When maintaining or inspecting high-voltage electrical equipment, the power supply for high-voltage drive can be stopped to work.

In the vehicle body structure of an electric vehicle according to a second aspect, an opening / closing sensor for detecting opening / closing of the maintenance lid is provided.
When the maintenance lid is removed, the breaker device is configured to operate based on the sensor signal, so when performing maintenance or inspection of high-voltage electrical equipment, stop the supply of high-voltage drive power before starting work. be able to.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a component arrangement view of an electric vehicle according to claim 1, and FIG. 2 is a vehicle body structure diagram of the electric vehicle according to claim 1. In FIG. 1, a fixing portion 2 is provided on the bottom plate of the electric vehicle 1.
The battery box 2 is attached at C, and the breaker device 3 is arranged so as to project from the breaker window B _W into the vehicle interior. Also, the junction box 4 and the plurality of high-voltage electrical equipment devices 5 are also arranged in the rear floor.

In FIG. 2, the breaker device 3, the high voltage electrical system device 5 and a junction box (not shown) are arranged in the rear floor Rf and are isolated by being covered with a maintenance lid L3 and a lid L _X to form a closed space. It will be configured. The upper portions of the maintenance lid L3 and the lid L _X are covered with the rear seat cushion 6.

The maintenance lid L3 is provided with an integrally formed switch cover SC to protect the breaker switch S, and a lid mounting portion 8A is provided at the bottom of the switch cover SC. On the other hand, a cutout is provided in a part of the maintenance lid L3 above the switch cover SC so that the breaker switch S can be operated from this cutout, and the cutout is closed by the lid L _X.

Further, a switch bracket 9 for fixing the switch cover SC is integrally provided on the rear floor Rf from which the breaker device 3 projects, and a hole is opened at a position where the switch bracket 9 and the lid mounting portion 8A come into contact with each other to form a bolt B _X.
Fix with. With the switch bracket 9 and the lid mounting portion 8A fixed with the bolt B _X , the breaker switch S
Is operated to the ON side (displayed by a broken line), the bolt B _X is positioned below the breaker switch S, and the bolt B _X cannot be removed.

The output cable 2B is connected to a junction box 4 (not shown), and the junction box 4 and the high-voltage electrical equipment 5 are connected by a connection cable (not shown).

Next, the work sequence for performing maintenance and inspection of the breaker device 3 or the high-voltage electrical system device 5 from the assembled and wired state will be described. First,
When the rear seat cushion 6 is removed and the lid L _X is removed, the breaker device 3 appears.

Next, since the breaker switch S is located on the on side (displayed by a broken line), it is operated on the off side (displayed by a solid line).
Then, the bolt B _X can be removed. When the breaker switch S is operated to the off side, the supply of the high voltage driving power supply can be stopped.

Subsequently, by removing the maintenance lid L3, the breaker device 3, the junction box 4, and the high-voltage electrical equipment 5 appear, and maintenance and inspection work can be performed. Further, by disconnecting the output cable 2B from the breaker device 3, the battery box 2 including the breaker device 3
Can be removed from the vehicle body or attached.

FIG. 3 is a vehicle body structural view of another electric vehicle according to the first aspect. In FIG. 3, the breaker switch S is an embodiment in the case where the front direction of the vehicle body is in the on state, and the point that the lid mounting portion 8B and the switch cover bracket 9 are provided in correspondence with the operation of the breaker switch S is shown in FIG. Different from 2. Note that the other configurations and operations are the same as those in FIG.

FIG. 4 is a component layout view of the electric vehicle according to the second aspect, and FIG. 5 is a vehicle body structural view of the electric vehicle according to the second aspect. In FIG. 4, a part or all of the high-voltage electric system device 5 is not arranged in the same space as the rear floor Rf where the breaker device 3 is arranged, and for example, a part of the high-voltage electric system device 5 is provided in the hood F. The case where they are arranged is shown. The present invention relates to a maintenance lid L4 that covers the high-voltage electric equipment 5 arranged in the hood F, and a maintenance lid L5 that covers the high-voltage electric equipment 5 arranged at another location of the vehicle body. Provided is a vehicle body structure of an electric vehicle capable of stopping the supply of a high-voltage driving power source regardless of which maintenance lid is removed.

In FIG. 5, an opening / closing sensor 10 is provided at a location where the high-voltage electrical equipment 5 is arranged, and a switch portion 10A of the opening / closing sensor 10 is provided in a concave portion provided in a vehicle body component 12 (eg, rear floor, upper floor, etc.). It is configured to be housed, held by maintenance lids L4 to L6, and fixed by bolts _BY . Since the open / close sensor 10 detects the opening when the maintenance lids L4 to L6 are not pressed, the switch holding jig 11 is used to sandwich the claw 11A in the slit 12A provided in the recess and the head of the switch 10A. Hold down a section.

FIG. 6 shows a structural diagram in which the switch portion is held down by the switch holding jig. A configuration is shown in which the switch portion 10A is previously held by the switch holding jig 11, fixed by the maintenance lids L4 to L6, and then the switch holding jig 11 is removed.

Since the open / close sensor 10 is arranged in this manner, the bolt B can be used for maintenance and inspection of the high voltage electrical equipment 5.
_{When Y} is removed and the maintenance lids L4 to L6 are opened, the switch unit 10A extends and the opening / closing sensor 10 detects the opening, and the sensor signal is provided to the breaker device 3 via the connector 10B, and the breaker device 3 operates. Shut off the high-voltage drive power supply.

FIG. 7 shows a block diagram of the essential parts of the breaker device. In FIG. 7, the breaker device 3 includes a breaker 21 having a manually operated breaker switch S, an auxiliary power supply V _L (12 V system), and a high voltage driving power supply V _H (240 V system) generated from a plurality of batteries. From the control power supply unit 22 that generates the control power supply V _D from the two systems, the control unit 24 that controls the operation of the switch unit 27 based on the sensor signals (Ko1, Ko2) of the opening / closing sensor 10 or the vehicle sensor 28, and the control unit 24. A switch unit 27 that trips the breaker 21 based on the switch control signals (Hh, Hl)
(SWa, SWb).

The breaker device 3 has terminals 3a and 3b.
And the terminals 2a and 2b of the high-voltage driving power source V _H (for example, 240 V system) of the battery box 2 between the input cable 2
It is connected via A and receives the supply of the high-voltage driving power source V _H , and the terminals 3c and 3d and the terminal 5a of the high-voltage electrical system device 5 are connected.
5b is connected via the output cable 2B to supply the high voltage driving power source V _H. Further, in the breaker device 3, the terminals 3d, 3e and 3f are respectively connected to the auxiliary power source V _L (12V).
System), the open / close sensor 10 shown in FIG. 5, and a vehicle sensor 28 including a speed sensor, an acceleration (G) sensor, a temperature sensor, a gas sensor, etc. mounted on the vehicle body.

The breaker 21 is provided with a manually operated breaker switch S, two systems of shunt coils Sh and Sl, and contacts Sa, Sb and Sc. When the breaker switch S is turned on, the contacts Sa to Sc are made to make a breaker switch. When the S is turned off, the contacts Sa to Sc break.
Further, when the contacts Sa to Sc are in the make state and a current is supplied to either one of the two systems of the shunt coils Sh and Sl, the contacts Sa to Sc shift to the break state.

The control power supply unit 22 includes a power supply conversion unit 23 composed of a DC / DC converter and backflow prevention diodes D _H and D _L , and the power supply conversion unit 23 is a high voltage drive power supply V
_H is converted to a 12V power supply (step-down), and the control power supply V _D is generated via the diode D _H. On the other hand, the auxiliary power supply V _L supplies the control power V _D via the diode D _L , and normally the control power V _D from the auxiliary power V _L drives the control unit 24,
When the voltage of the auxiliary power supply V _L drops due to forgetting to turn off the lamp or the like, the auxiliary power supply V _L is driven by the control power V _D from the power conversion unit 23.

The control unit 24 detects the state of the sensor based on the sensor signals K01 and K02 detected by the open sensor 10 or the vehicle sensor 28, and the detection unit 25.
The switch control signal Hh based on the detection signal Do from
A switch control unit 26 that generates Hl is provided, and switch control signals Hh and Hl are provided to the switch unit 27 to control ON / OFF of the switches SWa and SWb.

The switch unit 27 includes switches SWa and S
Wb, one end of the switch SWa is connected to the auxiliary power source V via the contact Sc of the breaker 21 and the shunt coil Sl.
_It is connected to _L and the other end is connected to the vehicle body ground, and is driven to the on or off state based on the switch control signal Hl from the switch control section 26. On the other hand, the switch SWb has one end connected to the plus (+) of the high-voltage drive power source V _H via the shunt coil Sh of the breaker 21 and the contact Sa, and the other end for high-voltage drive via the contact Sb of the breaker 21. Power supply V
_It is connected to the minus (-) of _H and is driven to the on or off state based on the switch control signal Hh from the switch controller 26.

Next, the operation of the breaker device 3 will be described.
In the normal state where the breaker switch S is in the ON state, the contacts Sa, Sb, Sc of the breaker 21 are in the ON state,
The high-voltage driving power source V _H for the battery box 2 is supplied to the high-voltage electrical equipment device 5 via the breaker device 3, and the high-voltage electrical equipment device 5 drives the motor 29 of the electric vehicle.

From this state, when any of the maintenance lids L4 to L6 is opened for maintenance or inspection of the high-voltage electrical equipment 5 shown in FIG. 5, an open sensor provided in each of the maintenance lids L4 to L6. 10 detects opening, sensor signal K
01 (for example, an H level signal) is sent to the detection unit 25,
The detection unit 25 provides a detection signal Do (for example, an H level signal) to the switch control unit 26, and outputs switch control signals Hh and Hl (for example, both H level signals) from the switch control unit 26 to the switches SWb and SWa, respectively. Then, the switches SWa and SWb are turned on.

When the switches SWa and SWb are turned on, a current flows through the shunt coils Sl and Sh of the breaker 21 to perform a trip operation, and the contacts Sa to Sc are contacted.
Shifts from the on state to the off state, and at the same time, the breaker switch S also switches from the on side (displayed by a solid line) to the off side (displayed by a broken line). The high-voltage drive power supply V _H, which was supplied to the high-voltage electrical equipment 5 by the OFF operation of the contacts Sa and Sb, is cut off, and the auxiliary power supply V V that is supplied to the shunt coil Sl by the OFF operation of the contact Sc. _{L is} also cut off.

Thus, the maintenance lids L4 to L shown in FIG.
The breaker device 3 can shut off the high-voltage driving power supply V _H to the high-voltage electrical system device 5 by detecting the open-circuit of the open sensor 10 provided in each of the devices 6.

In this embodiment, the open / close sensor 10 is shown in FIG.
Although the switch type sensor shown in FIG. 2 is used, the opening / closing sensor 10 may be formed of a sensor such as a photo interrupter to detect opening / closing of the maintenance lids L4 to L6.

[0039]

As described above, in the vehicle body structure of the electric vehicle according to the first aspect of the present invention, the maintenance lid is provided with the lid mounting portion so that the maintenance lid can be removed after the breaker switch is turned off. It is possible to perform maintenance and inspection work on breaker devices and high-voltage electrical equipment by stopping the supply of power for voltage drive.

Further, in the vehicle body structure of the electric vehicle according to the second aspect, an opening / closing sensor for detecting opening / closing of the maintenance lid is provided,
Since the breaker device is configured to operate based on the sensor signal when the maintenance lid is removed, the breaker device and high-voltage electrical equipment can be maintained and inspected by stopping the supply of high-voltage drive power. .

Therefore, when maintaining or inspecting the breaker device or the high-voltage electrical equipment, the electric vehicle of excellent workability can inevitably stop the supply of the high-voltage drive power supply without intentionally operating the breaker switch. A vehicle body structure can be provided.

[Brief description of drawings]

FIG. 1 is a layout of parts of an electric vehicle according to claim 1.

FIG. 2 is a vehicle body structure diagram of the electric vehicle according to claim 1;

FIG. 3 is a vehicle body structure diagram of another electric vehicle according to claim 1;

FIG. 4 is a layout drawing of parts of the electric vehicle according to claim 2;

FIG. 5 is a vehicle body structure diagram of the electric vehicle according to claim 2;

[Fig. 6] Structural drawing of the switch part held down by the switch holding jig

FIG. 7 is a block diagram of a main part of a breaker device.

FIG. 8 is a configuration diagram of a body structure of a conventional electric vehicle.

[Explanation of Codes] 1 ... Electric vehicle, 2 ... Battery box, 2A ... Input cable, 2B ... Output cable, 2C ... Fixed part, 3 ... Breaker device, 4 ... Junction box, 5 ... High voltage electrical equipment device, 6 ... Rear seat cushion, 7 ... Waterproof seal, 8A, 8B ... Lid mounting part, 9 ... Switch cover bracket, 10 ... Open / close sensor, 10A ... Switch part, 1
0B ... Connector, 11 ... Switch holding jig, 11A ... Claw portion, 12 ... Vehicle body constituting section, 12A ... Slit, 21 ... Breaker, 22 ... Control power supply section, 23 ... Power conversion section, 24 ... Control section, 25 ... Detection parts, 26 ... switch controller, 27 ... switch unit, 28 ... vehicle sensor, 29 ... motor, B _X ... bolt, B _W ... breaker window, L1 to L6 ... maintenance lid, L _X ... lid, S ... breaker Switch, SC ... switch cover, SWa, SWb ... switch, Sa, Sb,
Sc ... Contact, Sh, Sl ... Shunt coil, Do ... Detection signal, Hh, Hl ... Switch control signal, K01, K02
... sensor signal, V _D ... control power, V _H ... high-voltage power supply, V _L ... auxiliary power.

Claims (2)

[Claims] 1. A breaker device for controlling the supply and interruption of a high-voltage drive power supply for driving an electric vehicle, and a high-voltage electrical system device driven by the high-voltage drive power supply are housed,
In a vehicle body structure of an electric vehicle in which a maintenance lid covers a closed space, the maintenance lid is attached and detached only when a manual breaker switch provided in the breaker device is in an off state. A vehicle body structure of an electric vehicle, which is provided with a lid mounting portion capable of 2. A vehicle body structure of an electric vehicle, which houses a high-voltage electrical system device driven by a high-voltage drive power source and is covered with a maintenance lid to form a closed space, wherein an opening / closing for detecting opening / closing of the maintenance lid. Equipped with a sensor,
Actuating a breaker device that controls the supply and cutoff of the high-voltage drive power supply based on a sensor signal detected by the open / close sensor, and cutting off the supply of the high-voltage drive power supply to the high-voltage electrical system device. The body structure of an electric vehicle characterized by.