JPH11266502A - Power supply display device of electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the on/off states of a power supply to be confirmed, even on the outside of an electric vehicle by providing a power supply display means for displaying the on/off state of a power switch at a site outside the driver's cabin of the electric vehicle. SOLUTION: By the turning on of a power switch 4, a controller 3 is turned on, a battery 2, a motor 1, and a cooling fan 9 can be energized, and at the same time, a power supply display means 6 being provided in an operator's panel is turned on. As a result, a worker can recognize that an electric vehicle is ready to be driven, and equipment such as the motor 1 and the cooling fan 9 in the motor room is ready to operate and then can inspect and maintain the inside of the motor room, thus preventing the worker from carelessly bringing hands close to such movable part as the motor 1 and the cooling fan 9, inserting or pulling the connector of high-voltage equipment in a live state such as the battery 2, and allowing inspection and maintenance of a power supply display device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply display device for an electric vehicle for displaying an on / off state of a power switch of the electric vehicle.

[0002]

2. Description of the Related Art In recent years, electric vehicles that run on a motor using a battery as a power source have been developed and put into practical use. One of the features of this electric vehicle is that it does not require idling while the vehicle is stopped as in a conventional internal combustion engine type vehicle. In other words, the vehicle can travel at any time if the power of the traveling motor is on, and there is no need to rotate the motor while the traveling is stopped.

[0003] However, this means that it is not possible to determine whether or not the vehicle is in a runnable state based on the rotation sound of the motor, which is inconvenient for the driver. For this reason,
In a conventional electric vehicle, as shown in FIG. 4, a power supply display means 35 such as a display lamp is provided at a position in the operation panel 30 where the driver has good visibility. In a conventional electric vehicle, as shown in FIG. 5, the operation of a traveling drive motor (motor) 31 and the operation of a cooling fan 39 of the motor 31 are controlled through a controller 33. The battery (power supply) 32, the motor 31, and the cooling fan 39 can be energized only when the switch is on, and the accelerator setting device (for example,
The operation of the motor 31 is controlled in accordance with a command from an accelerator pedal 37, and the operation of the cooling fan 39 is controlled in accordance with information detected by the temperature sensor 38.

The power display means 35 indicates that the operation switch 34 is turned on and the battery 32 and the motor 31 can be energized, and lights up in synchronization with the ON / OFF of the operation switch 34. It has become. That is, the driver can determine at a glance whether or not the vehicle is in a runnable state based on whether or not the power supply display means 35 is lit.

[0005]

By the way, in the case of an electric vehicle, the motor 31 is also stopped while the running is stopped as described above, but the battery 32 and the motor 31 are in an energizable state. 32 is a high voltage of 200 to 400V. Further, when the temperature of the motor 31 detected by the temperature sensor 38 attached to the motor 31 becomes equal to or higher than a specified value, the cooling fan 3 is forcibly applied even when the traveling is stopped.
9 rotates.

Therefore, even when the electric vehicle is stopped, when the operation switch 34 is on, the motor 31 or the cooling fan 39 may be inadvertently touched or the connector of the battery 32 may be inserted or removed. Should be avoided. In other words, in the case of an internal combustion engine type vehicle, if the engine is running, it can be immediately detected by sound or vibration.
1 is also stopped, and the power supply display means 35 indicates whether a person outside the vehicle is in a state where the motor 31 and the like can be energized, that is, whether the vehicle corresponds to an idling state or an engine stop state of an internal combustion engine type vehicle. It is difficult to judge by something other than.
Therefore, the power supply display means 35 is relied on, but since the conventional power supply display means 35 is installed with emphasis on the driver's visibility, the power supply display means 35 is confirmed from a position far away from the driver such as outside the vehicle compartment. It is difficult. In particular, when performing inspection work on the motor room with the hood open,
It is impossible for the operator to check the power supply display means 35 in the operation panel 30.

For this reason, there is a possibility that a person approaches or touches the vehicle, assuming that the vehicle does not move, or a worker may perform an inspection work while assuming that the operation switch 34 is turned off. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to provide a power supply display device for an electric vehicle, in which an on / off state of a power supply can be checked even outside a passenger compartment. .

[0008]

Therefore, in the power supply display device for an electric vehicle according to the present invention, a power supply display means is provided outside a passenger compartment of the electric vehicle in which power supply from a battery to a motor is turned on / off by a power switch. The on / off state of the power switch is displayed by the power display means even at a location outside the passenger compartment.

It is desirable that the power supply display means be provided in the vicinity of a rotating device such as a motor, a controller, an air conditioner, a charger, a heater, or a high-voltage device even in a portion outside the passenger compartment, and these components are dispersedly arranged. In such a case, the power supply display means may be provided separately according to the power supply. Further, it may be arranged on a roof, a hood, a trunk lid or the like. Thus, the ON / OFF state of the power switch can be easily confirmed not only by the driver but also by a worker who is checking the vehicle from a person far away from the electric vehicle.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a power supply display device for an electric vehicle according to an embodiment of the present invention. First, the outline of the configuration of an electric vehicle to which the present power supply display device is applied will be described. As shown in FIG.
An electric vehicle to which the present power supply display device is applied first turns on a power switch (operation switch) 4 so that
Power is supplied to the controller 3, and the battery 2 and the motor 1 and the cooling fan 9 are energized. At the same time, the power supply display means 5 provided in an operation panel (not shown) and the outside of the passenger compartment are provided. The power display means 6 such as a display lamp is turned on.

When an accelerator setting device (eg, accelerator pedal) 7 is operated, a current corresponding to the amount of operation is supplied from the battery 2 to the motor 1, so that the electric vehicle runs. Further, the motor 1 is provided with a temperature sensor 8, and when the temperature of the motor 1 exceeds a specified value, the cooling fan 9 is forcibly driven regardless of the operation of the driver. .

FIG. 2 shows an example of installation of the present power supply display device, in which an electric vehicle in which main devices such as a motor 1, a controller 3 and a battery 2 are collectively arranged in a motor room 20 is shown. . In such a case, the motor room 2
When the hood 21 is opened, the power supply display means 6
It is desirable that the power supply display means 6 is installed on the case of the controller 3 in the motor room 20.

FIG. 3 is a diagram showing the circuit configuration of the controller 3 in the installation example shown in FIG. 2. The electric vehicle to which the power supply display device is applied will be described in further detail with reference to FIG. As shown in FIG. 3, when the operation switch 4 is turned on, first, power is supplied from the auxiliary / control system power supply 11 of 12 V to the microcomputer 3a in the controller 3, and the controller 3 is turned on. Then, the main circuit relays 12a and 12b are turned on via the drive circuit 3b, and the battery 2 and the motor 1 can be energized. At the same time, power is also supplied to the power supply display means 5 in front of the driver's seat in the vehicle compartment and the power supply display means 6 provided on the controller 3 via the drive circuit 3c so that the power supply display means 5, 6 is turned on. It has become.

When the driver steps on the accelerator 7a, the amount of depression is converted into an electric signal by the accelerator setting device 7 and sent to the microcomputer 3a. The microcomputer 3a controls the amount of power supplied from the battery 2 to the motor 1 in accordance with the accelerator depression amount via the inverter 3d, the power element driving circuit 3e, and the inverter power switching element 3f. The microcomputer 3a detects the temperature of the motor 1 by a temperature sensor 8 attached to the motor 1. When the temperature of the motor 1 exceeds a specified value, the microcomputer 3a turns off the drive circuit 3g and the cooling fan relay 13. The cooling fan motor 9a of the cooling fan 9 is driven through the motor. The driving of the cooling fan motor 9a is forcibly performed even when the electric vehicle is stopped, as long as power is supplied to the microcomputer 3a while the operation switch 4 is on.

Since the power supply display device for an electric vehicle according to one embodiment of the present invention is configured as described above, when the operation switch 4 is turned on, the power supply display means 5 provided in the operation panel is provided. Not only that, the power supply display means 6 in the motor room 20 also turns on. This power display means 6
Since it is provided at a position that can be seen at a glance when the hood 21 of the motor room 20 is opened as on the case of the controller 3, an operator who intends to inspect and maintain the inside of the motor room 20 needs to be in front of the driver's seat. It is possible to easily confirm that the operation switch 4 is turned on without confirming the power supply display means 5.

Thus, the operator recognizes that the electric vehicle is in a state in which the electric vehicle can travel and the equipment such as the motor 1 and the cooling fan 9 in the motor room 20 can be operated. Inspection and maintenance of the inside of the motor 20 can be performed, and hands can be inadvertently brought close to moving parts such as the motor 1 and the cooling fan 9, or a high voltage that is inadvertently activated such as the battery 2. It is possible to prevent the connector of the device from being inserted and removed, and to perform inspection and maintenance work safely.

The power supply display device for an electric vehicle according to the present invention is not limited to the above-described embodiment. For example, the installation location of the power supply display means 6 is not limited to the controller 3 in the motor room 20. Any location that can be easily checked when the operator opens the hood 21 may be used, such as on the battery 2 or behind the hood 21. In the case where rotating devices and high-voltage devices such as a motor 1, a controller 3, and an air conditioner, a charger, and a heater (not shown) are not integrated in the motor room 20 but are distributed and arranged at appropriate positions in the electric vehicle, The power supply display means 6 may be appropriately provided at the location (necessary location). This has the further advantage of ensuring safety.

Further, in order to make it easy to confirm even from a position far from the electric vehicle, the power supply display means 6 is provided on the surface of the vehicle body, for example, on a roof, hood, trunk lid or the like.
May be installed. When a lamp as shown in the embodiment is used as the power display means 6, the lighting method is as follows.
It may be a constant lighting method or a blinking method. Further, the power supply display means 6 may be a display using a sound such as a buzzer or a display which adds sound to a visual display such as a lamp. Alternatively, the light may be turned on or sounded only when the worker opens the hood 21 of the motor room in conjunction with the hood 21 of the motor room.

[0019]

As described in detail above, according to the power supply display device for an electric vehicle of the present invention, when the power switch is turned on, the display means provided outside the passenger compartment lights up, so that the electric operator A person outside the passenger compartment can easily check whether the power switch is turned on.

As a result, for example, inspection and inspection of electric vehicles
Workers who use maintenance should be able to safely perform inspection and maintenance work after recognizing whether or not the electric vehicle is in a runnable state and each device such as a motor is operable. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically illustrating a main configuration of an electric vehicle to which a power supply display device for an electric vehicle according to an embodiment of the invention is applied.

FIG. 2 is a schematic diagram illustrating an example of a configuration in which a power supply display device for an electric vehicle as one embodiment of the present invention is applied to an electric vehicle.

FIG. 3 is a circuit diagram of a controller of the electric vehicle according to one embodiment of the present invention.

FIG. 4 is a schematic diagram showing an application example of a conventional power supply display device to an electric vehicle.

FIG. 5 is a block diagram schematically showing a main configuration of an electric vehicle to which a conventional power supply display device is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 2 Battery 3 Controller 4 Operation switch (power switch) 6 Power display means 7 Accelerator setting means 8 Temperature sensor 9 Cooling fan

Claims (1)

[Claims] 1. An electric vehicle comprising a motor, a battery for supplying power to the motor, and a power switch for turning on / off the power supply from the battery to the motor, wherein an on / off state of the power switch is provided. A power supply display device for an electric vehicle, characterized in that a power supply display means for displaying the information is provided at a portion outside the passenger compartment of the electric vehicle.