JP2001119812A - Battery-driven electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery-driven electric vehicle which can move by urgently operating the vehicle when a battery in the vehicle is depleted. SOLUTION: An electric vehicle A is operated by driving a motor 2 which a built-in battery 1. A switching element 3 which adjusts the power supplied to the motor 2 is connected in series with the battery 1 and motor 2. In addition, a terminal 4 for connecting emergency battery pack is provided in parallel with the battery 1 in such a way that the terminal 6 of an emergency battery pack 5 can be connected to the terminal 4 in a freely attachable/detachable state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery-powered electric vehicle used by a person for riding, shopping, and other purposes.

[0002]

2. Description of the Related Art Conventionally, there is known a battery-powered electric vehicle that is used by a person (for example, an elderly person or a person with a physical disability) to travel on a shopping or other purpose. This battery-powered electric vehicle runs by driving a motor using a storage battery (generally, a lead battery) built in the electric vehicle as a power supply.

However, in a conventional battery-powered electric vehicle, when the capacity of the storage battery is exhausted, the electric vehicle naturally stops. In such a case, there is a problem that the user has to transport the electric vehicle to a place where charging is possible by human power.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is capable of urgently driving and moving even when the capacity of a storage battery built in a battery-driven electric vehicle is exhausted. It is an object of the present invention to provide a battery-powered electric vehicle that can be used.

[0005]

In order to solve the above-mentioned problems, a battery-driven electric vehicle according to the present invention is an electric vehicle A in which a motor 2 is driven by a built-in storage battery 1 in a battery A, a motor 2 and a motor 2. A switching element 3 for adjusting the power supplied to the battery is connected in series, an emergency battery pack connection terminal 4 is provided in parallel with the storage battery 1, and the emergency battery pack 5 is connected to the emergency battery pack connection terminal 4. The terminal 6 is detachably connected. With such a configuration, when the capacity of the storage battery 1 built in the electric vehicle A is exhausted, the terminal 6 of the emergency battery pack 5 is connected to the emergency battery pack connection terminal 4 so that the emergency It is possible to drive and move.

When the terminal 6 of the emergency battery pack 5 is connected to the terminal 4 of the emergency battery pack, the current from the emergency battery pack 5 flows to the motor 2 side.
It is preferable to provide a means for preventing the water from flowing on the side. With this configuration, when the emergency battery pack 5 is connected and used as an emergency power source, the current from the emergency battery pack 5 efficiently flows to the motor 2 side without flowing to the storage battery 1 side. Emergency driving can be performed effectively.

In a state where the terminal 6 of the emergency battery pack 5 is connected to the terminal 4 for connecting the emergency battery pack, the current from the emergency battery pack 5 flows to the motor 2 side.
There is a changeover switch 4 to prevent the water from flowing to the side.
Preferably, it is constituted by one. With such a configuration, when the emergency battery pack 5 is connected, the switch 41 is switched so that the current from the emergency battery pack 5 does not easily flow to the storage battery 1 and the motor 2 And emergency operation can be performed effectively.

The electric vehicle A is provided with an emergency battery pack mounting portion 7, the emergency battery pack mounting portion 7 is provided with an emergency battery pack connection terminal 4, and the emergency battery pack 5 is mounted with the emergency battery pack. It is preferable that the terminal 6 of the emergency battery pack 5 be detachably attached to the portion 7 and that the terminal 6 of the emergency battery pack 5 can be freely connected to the emergency battery pack connection terminal 4. With this configuration, the emergency battery pack 5 is attached to the emergency battery pack attachment portion 7 provided in the electric vehicle A, so that the terminal 6 of the emergency battery pack 5 becomes the emergency battery pack connection terminal 4. What can be connected.

Further, an insertion groove 7a for inserting a part or all of the emergency battery pack 5 into the electric vehicle A is provided to constitute an emergency battery pack mounting portion 7, and the emergency battery pack 7 is inserted into the insertion groove 7a. Preferably, connection terminals 4 are provided. With this configuration, the emergency battery pack 5 can be easily supported and electrically connected by inserting the emergency battery pack 5 into the insertion groove portion 7a constituting the emergency battery pack mounting portion 7. Can be done.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings.

The electric vehicle A is mainly composed of a frame 8 and a body 9 serving as an outer shell. The electric vehicle A includes a motor 2 and a storage battery 1 for driving the motor 2, and runs by rotating the wheels 10 by driving the motor 2 with the storage battery 1. Storage battery, motor 2
Is attached to the frame 8 as shown in FIG. In addition,
The storage battery 1 may be removable, and may be removed and replaced as needed.

The body 9 has a front portion and a rear portion rising to form a front rising portion 11 and a rear rising portion 12, respectively.
It is 3. A seat 14 is provided between the front rising portion 11 and the rear rising portion 12 in the body 9 and closer to the rear rising portion 12 side, so that the user can get on and off from the getting on / off opening 13 and sit on the seat 14. It has become. The position of the seat 14 can be slid freely by any sliding means.

Above the front ends on both sides of the rear rising portion 12, a rear end of an armrest 15 is rotatably mounted. The armrest 15 has a horizontal state shown in FIG. It is rotatable between a flip-up position in which it is flipped upward so that the user sitting on the seat 14 can put his arms in the horizontal state. Even if a downward load is applied to the armrest 15, the armrest 15 does not rotate downward. On the other hand, when the user sitting on the seat 14 gets off, the armrest 15 is flipped up from the horizontal state so that the tip is upward, so that the getting-on / off opening 1 is obtained.
You can get off from 3.

A portion of the front rising portion 11 facing the seat 14 has a foot guard portion 32 recessed forward.
By arranging the foot in the foot guard portion 32 of the front rising portion 11, the foot can be prevented from getting wet even on a rainy day.

Handles (not shown) are provided at both front and rear sides of a portion between the front and rear wheels 10 on the lower surface of the body 9 so that the electric vehicle A can be easily lifted. The electric vehicle A can be easily lifted by putting a hand on the handle when it gets stuck. In addition, blinkers 26 are provided on both sides of the front rising portion 11 and on both sides of the rear rising portion 12, respectively. The wheel 10 is provided with a puncture-less tire having cushioning properties similar to those of the tube type.

A handle shaft 16 protrudes upward from the center of the front rising portion 11 in the width direction, and an equipment box 17 is provided above the handle shaft 16. Is the handle 18
Are protruded toward both sides, and the handle 18 has a substantially rectangular shape composed of a straight bar portion 18a and an arc-shaped portion 18b, and the straight bar portion 18a of the handle 18 is located on the seat 14 side. ing. Then, when the steering wheel 18 is steered, the device box 17 integrated with the steering wheel 18 rotates integrally with the steering wheel 18.

As shown in FIG. 5, a light 19 is provided on the front surface of the equipment box 17, and when the steering wheel 18 is steered, the light 19 turns integrally with the steering wheel 18 to indicate the direction in which the steering wheel 18 is turned. To illuminate. As shown in FIG. 7, on the front of the equipment box 17, a charge display section 20 for displaying how much the battery 1 has been charged when filling the storage battery 1, and the charge capacity is 20% or less of the initial capacity regardless of the battery life of the storage battery 1. Remaining display unit 21 for blinking, voice warning, or displaying remaining distance, light 1
9, a lighting display unit 22, a speed display unit 23, a maximum speed switching dial 24 for switching the maximum speed, a horn generation operation unit 25 for generating an alarm horn, and a turn signal 2
A turn signal operation section 27 for displaying the number 6 is provided. Further, a key hole 28 is provided at the lower end of the front part of the equipment box 17. The key hole 28 allows a key to be inserted from above, and the key hole 28 is formed of a phosphorescent material. A person or a person with a physical disability can securely check the key hole 28 and easily insert the key into the key hole from above.

Handles 18 are provided on both sides of the equipment box 17.
An accelerator lever 29 is provided substantially in parallel with the straight rod portion 18a of the seat 14, and a user sitting on the seat 14 can operate the accelerator lever 29 with either the left hand or the right hand. When the accelerator lever 29 is grasped and operated by hand, a brake switch 33 described later is turned off to release the electromagnetic brake 34, and the speed can be controlled according to the operation amount of the accelerator lever 29.

A brake lever 30 for operating a brake such as a drum brake different from the electromagnetic brake 34 protrudes from the upper portion on both sides of the equipment box 17. The brake lever 30 is an arc-shaped portion of the handle 18. Above or below 18b, it is arranged substantially parallel to the arc-shaped portion 18b. Then, the brake lever 30 can be operated while gripping the arc-shaped portion 18b of the handle 18 with a hand, and can be operated with the same feeling as operating the brake lever while gripping the handle on a bicycle. I have. In other words, handle 1 like a bicycle
8. Both of the brake levers 30 can be simultaneously held.

A large rearview mirror 31 is attached to the equipment box 17 or the handle 18.

At the rear of the rear rising portion 12 of the body 9, there is provided a notch-back portion 40 which is lower by one step, and a part or all of the emergency battery pack 5 is inserted into the upper surface of the notch-back portion 40. The insertion groove 7a is provided as an emergency battery pack mounting part 7. An emergency battery pack connection terminal 4 is provided on the inner surface of the insertion groove 7a, and part or all of the emergency battery pack 5 is inserted into the insertion groove 7a so that the emergency battery pack 5 is inserted into the insertion groove 7a. The terminal 6 provided on the emergency battery pack 5 is held and is electrically connected to the emergency battery pack connection terminal 4 provided on the inner surface of the insertion groove 7a.

FIG. 9 is a block circuit diagram of a drive system of the electric vehicle A according to the present invention. As shown in FIG. 9, a storage battery 1, a motor 2, and a switching element 3 for adjusting the power supplied to the motor 2 are connected in series.
An electromagnetic brake 34 and a control circuit 35 are connected to the circuit in parallel with the motor 2. In FIG. 9, 36 is the key hole 2
Reference numeral 33 denotes a key switch that is turned on and off by operating a key inserted into the key 8, reference numeral 33 denotes a brake switch that is turned off by operating the accelerator lever 29 and turned on by not operating the accelerator lever 29, and reference numeral 37 denotes an accelerator lever. This is the accelerator volume operated by 29. The drive system circuit has an emergency battery pack connection terminal 4 in parallel with the storage battery 1 as shown in FIG. 9. The emergency battery pack connection terminal 4 is connected to the terminal of the emergency battery pack 5. 6 is detachably connected.

In the above-mentioned circuit, a changeover switch 41 is provided. In the case of normal use in which the storage battery 1 is driven as a power supply, a contact of the changeover switch 41 is connected to the storage battery 1 side, and a current from the storage battery 1 is supplied to the motor. The emergency battery pack 5 is connected to the emergency battery pack connection terminal 4 so that the terminal 6 of the emergency battery pack 5 is connected to the emergency battery pack connection terminal 4 so that the emergency battery pack 5 can be powered. In this case, the changeover switch 41 is switched and the changeover switch 4
The contact 1 is separated from the contact on the storage battery 1 side and connected to the contact on the emergency battery pack connection terminal 4 side, so that the current from the emergency battery pack 5 flows to the motor 2 side.
It is designed not to flow to the side.

The changeover switch 41 may be changed over by a manual operation. Alternatively, the changeover switch 41 may be used to insert the emergency battery pack 5 into the insertion groove 7a constituting the emergency battery pack mounting portion 7 and mount it. The changeover switch 41 may be mechanically switched in conjunction with it. In the latter case, the changeover switch 41 is mechanically switched by attaching the emergency battery pack 5 to the emergency battery pack mounting portion 7, and the changeover switch 4
1 is separated from the contact on the storage battery 1 side and connected to the contact on the emergency battery pack connection terminal 4 side, and the emergency battery pack 5
Is removed from the emergency battery pack mounting part 7, the changeover switch 41 is switched in the opposite manner, and the contact of the changeover switch 41 is separated from the contact on the emergency battery pack connection terminal 4 side to the contact on the storage battery 1 side. Connect.

The operation of the electric vehicle A according to the present invention is performed as follows. That is, in normal operation, the battery is used with the emergency battery pack 5 removed, that is, with the contact of the changeover switch 41 connected to the contact of the storage battery 1, and the key is inserted into the key hole 28. By turning on the key switch 36, and operating the accelerator lever 29 in this state, the brake switch 33 is turned off to release the brake by the electromagnetic brake 34, and the accelerator volume is adjusted according to the operation amount of the accelerator lever 29. The control circuit 35 outputs a control signal from the control circuit 35 to the switching element 3 based on the signal from the accelerator volume 37 and adjusts the power supplied from the storage battery 1 to the motor 2 by the switching element 3 to rotate the motor 2. And the vehicle travels while adjusting the speed of the electric vehicle A.

As described above, the vehicle travels by grasping and operating the accelerator lever 29 by hand, and travels while adjusting the speed in accordance with the operation amount of the accelerator lever 29. Accelerator volume 3
When 7 is set to the zero state, the supply of electric power to the motor 2 is stopped, and the brake switch 36 is turned on to operate the electromagnetic brake 34 to apply the brake. Here, for example, the electromagnetic brake 34 has a configuration in which the motor output shaft is stopped by grasping it with a shoe, or
The structure is such that the axle is stopped by the shoe.

On the other hand, when the capacity of the storage battery 1 is exhausted and the electric vehicle A stops, the emergency battery pack 5 is attached to the emergency battery pack attaching portion 7 provided on the electric vehicle A (in the embodiment, the insertion groove portion). Emergency battery pack 5 on 7a
Terminal 6 of the emergency battery pack 5
Is connected to the emergency battery pack connection terminal 4 and the changeover switch 41 is switched so that the contact of the changeover switch 41 is separated from the contact on the storage battery 1 side and connected to the contact on the emergency battery pack connection terminal 4 side. is there. Thus, similarly to the normal driving described above, the electric vehicle A can travel while adjusting the speed of the electric vehicle A by inserting the key into the key hole 28, turning on the key switch 36, and operating the accelerator lever 29. Yes, the electric vehicle A can be driven to a place where the user can ride the electric vehicle A while the electric vehicle A can be charged. The emergency battery pack 5 is removed at the place where the electric vehicle can be charged, and the storage battery 1 is charged. is there.

As the emergency battery pack 5, for example, a battery pack used as a power source of a power tool or the like which is commercially available can be used. The battery pack used as a power source of the power tool is, for example, a 24 V battery. When this is used, the vehicle can travel about 3 km.

A charging cord lead-out portion 38 is provided on the upper surface of the rear rising portion 12 of the body 9. The lid 39 provided on the charging cord lead-out portion 38 is opened to pull out the charging cord from the inside. The storage battery 1 can be charged. As described above, the charging cord lead-out portion 38 is provided on the upper surface of the rear rising portion 12 of the body 9.
Is provided, the charging cord can be taken in and out at a high position without bending the waist, and the operability is improved, so that the elderly or the physically handicapped can easily perform the charging operation.

In a state where the terminal 6 of the emergency battery pack 5 is connected to the terminal 4 for connecting the emergency battery pack, the current from the emergency battery pack 5 flows to the motor 2 side.
The means for preventing the air from flowing to the side is constituted by the changeover switch 41 in the above embodiment, but is not necessarily limited to this. For example, a diode may be provided in series with the storage battery 1, and the polarity of the diode may be such that when the emergency battery pack 5 is connected, the emergency battery pack 5 has a polarity that prevents the storage battery 1 from being charged. Also in this case, in a state where the terminal 6 of the emergency battery pack 5 is connected to the terminal 4 for connecting the emergency battery pack, the current from the emergency battery pack 5 flows to the motor 2 side, but the current flows to the storage battery 1 side. It is something that can not be done.

[0031]

As described above, according to the first aspect of the present invention, in an electric vehicle in which a motor is driven by a built-in storage battery, switching for adjusting the storage battery, the motor, and power supplied to the motor is performed. The device is connected in series, an emergency battery pack connection terminal is provided in parallel with the storage battery, and the emergency battery pack terminal can be detachably connected to the emergency battery pack connection terminal. Even if the capacity of the storage battery is exhausted, the emergency battery pack is attached and the terminal of the emergency battery pack is connected to the emergency battery pack connection terminal, so that the electric vehicle can be easily moved to a place where emergency driving and charging can be performed As a result, as in the past, when the capacity of the storage battery is exhausted and the electric vehicle stops, the electric vehicle can be moved to a place where it can be charged. It is that there is no need to be transported in force. In addition, since a battery pack is used, a normally used battery pack can be used as an emergency battery pack.

According to the second aspect of the present invention, in addition to the effects of the first aspect, the emergency battery pack terminal is connected to the emergency battery pack connection terminal. A means is provided to allow the current from the battery pack to flow to the motor side but not to the storage battery side. The current from the pack efficiently flows to the motor side without flowing to the storage battery side, and the emergency operation can be effectively performed.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect, the emergency battery pack terminal is connected to the emergency battery pack connection terminal. In this state, a means for passing the current from the emergency battery pack to the motor side but not to the storage battery side is constituted by a changeover switch. By switching between the two, the current from the emergency battery pack flows efficiently to the motor side without flowing to the storage battery side, and the emergency operation can be effectively performed with a simple configuration.

According to a fourth aspect of the present invention, in addition to the effects of the first aspect, an emergency battery pack mounting portion is provided on the electric vehicle, and the emergency battery pack mounting portion is provided on the emergency battery pack mounting portion. Battery pack connection terminals are provided, and the emergency battery pack is detachably attached to the emergency battery pack mounting part, and the terminals of the emergency battery pack are freely connectable to the emergency battery pack connection terminals. The emergency battery pack is mounted and supported on the provided emergency battery pack mounting portion, and the terminals of the emergency battery pack can be easily connected to the emergency battery pack connection terminals.

According to a fifth aspect of the present invention, in addition to the effects of the fourth aspect of the present invention, an insertion groove for inserting a part or the entirety of the emergency battery pack is provided in the electric vehicle. An emergency battery pack mounting part is configured, and an emergency battery pack connection terminal is provided in the insertion groove part. Therefore, it is easy to insert the emergency battery pack into the insertion groove part that constitutes the emergency battery pack mounting part. The emergency battery pack can be supported and electrically connected, and the support and electrical connection of the emergency battery pack can be realized with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a partially broken side view of the present invention.

FIG. 2 is a partially cut away rear view of the same.

FIG. 3 is an enlarged side view in which a portion X of FIG. 1 is enlarged and partially broken.

FIG. 4 is an enlarged rear view in which a part Y in FIG. 2 is enlarged and partially broken.

FIG. 5 is a perspective view showing the whole of the same as viewed from the front.

FIG. 6 is a perspective view showing the whole of the same as viewed from the rear side.

FIG. 7 is a front view showing a handle portion of the same.

FIG. 8 is a perspective view showing the frame of the above.

FIG. 9 is a block circuit diagram of a driving system according to the embodiment.

[Explanation of symbols]

 A electric vehicle 1 storage battery 2 motor 3 switching element 4 emergency battery pack connection terminal 5 emergency battery pack 6 terminal 7 emergency battery pack mounting part 7a insertion groove

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[Procedure amendment]

[Submission date] December 6, 1999 (1999.12.
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

In order to solve the above-mentioned problems, a battery-driven electric vehicle according to the present invention comprises an electric vehicle A in which a motor 2 is driven by a built-in storage battery 1 in which a storage battery 1 and a motor 2 are connected in series. And an emergency battery pack connection terminal 4 is provided in parallel with the storage battery 1, and the terminal 6 of the emergency battery pack 5 is detachably connected to the emergency battery pack connection terminal 4 so that the emergency battery pack can be connected. Urgent for terminal 4
With the terminal 6 of the emergency battery pack 5 connected, the emergency battery
The current from the pack 5 flows to the motor 2 side, but the storage battery 1 side
Is provided with means for preventing it from flowing . With such a configuration,
When the capacity of the storage battery 1 built in the electric vehicle A is exhausted, the terminal 6 of the emergency battery pack 5 can be connected to the emergency battery pack connection terminal 4 to drive and move urgently. made things der is, also, an emergency battery pack
5 to be used as an emergency power supply,
Current from the battery 5 efficiently without flowing to the storage battery 1 side
It can flow to the motor 2 side for effective emergency operation.
You.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Deleted

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction contents]

[0031]

As described above, according to the first aspect of the present invention, in an electric vehicle in which a motor is driven by a built-in storage battery, the storage battery, the motor and the motor are connected in series, and the storage battery is connected in parallel with the storage battery. An emergency battery pack connection terminal is provided, and the emergency battery pack terminal is detachably connected to the emergency battery pack connection terminal.
With the emergency battery pack terminal connected to the
The current from the emergency battery pack flows to the motor side, but the storage battery
Because there is a means to prevent it from flowing on the side, even if the capacity of the storage battery built in the electric vehicle is lost,
By attaching the emergency battery pack and connecting the terminal of the emergency battery pack to the terminal for connecting the emergency battery pack, it is possible to easily move while riding the electric vehicle to a place where emergency driving and charging can be performed As a result, when the electric vehicle stops due to lack of storage battery capacity as in the related art, there is no need to manually transport the electric vehicle to a place where charging is possible, and since a battery pack is used. are those making it possible to use a battery pack that is normally used as an emergency battery pack, also emergency electric
When connecting a pond pack to use as an emergency power supply,
Efficient without current from the pond pack flowing to the storage battery
The emergency flow can be effectively performed by flowing to the motor side.
You.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0032

[Correction method] Deleted

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction contents]

Further, in the invention according to claim 2,
In addition to the effect of the invention described in claim 1, in a state where the terminal of the emergency battery pack is connected to the terminal for connecting the emergency battery pack, the current from the emergency battery pack flows to the motor side but to the storage battery side. Since the means for preventing the current from flowing is constituted by a changeover switch, the current from the emergency battery pack flows to the storage battery with a simple configuration by switching the changeover switch when the emergency battery pack is connected. This allows the motor to flow efficiently to the motor side and to perform the emergency operation effectively.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction contents]

According to the third aspect of the present invention,
In addition to the effects of the first aspect of the present invention , an emergency battery pack mounting portion is provided in the electric vehicle, an emergency battery pack connection terminal is provided in the emergency battery pack mounting portion, and the emergency battery pack is used for emergency. The emergency battery pack is detachably attached to the battery pack mounting part and the terminal of the emergency battery pack is freely connectable to the terminal for connecting the emergency battery pack. In addition to supporting, the terminal of the emergency battery pack can be easily connected to the emergency battery pack connection terminal.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

In the invention according to claim 4,
In addition to the effect of the invention described in claim 3 , an insertion groove for inserting a part or all of the emergency battery pack is provided in the electric vehicle to constitute an emergency battery pack mounting portion, and an emergency battery pack is provided in the insertion groove. The emergency battery pack connection terminal is provided, so that the emergency battery pack can be easily supported and electrically connected by inserting the emergency battery pack into the insertion groove that constitutes the emergency battery pack mounting part. Thus, support and electrical connection of the emergency battery pack can be realized with a simple configuration.

[Procedure amendment 9]

[Document name to be amended] Drawing

[Correction target item name] Fig. 9

[Correction method] Change

[Correction contents]

FIG. 9

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Claims (5)

[Claims] 1. An electric vehicle in which a motor is driven by a built-in storage battery, wherein the storage battery and a switching element for adjusting power supplied to the motor and the motor are connected in series, and an emergency battery pack is connected in parallel with the storage battery. A battery-driven electric vehicle, characterized in that a terminal is provided, and an emergency battery pack connection terminal is detachably connected to an emergency battery pack connection terminal. In a state where the emergency battery pack terminal is connected to the emergency battery pack connection terminal, the current from the emergency battery pack flows to the motor side but does not flow to the storage battery side. 2. The battery-powered electric vehicle according to claim 1, further comprising means. In a state where the terminal of the emergency battery pack is connected to the terminal for connection of the emergency battery pack, a current from the emergency battery pack flows to the motor side but not to the storage battery side. 3. The battery-driven electric vehicle according to claim 2, wherein the means comprises a changeover switch. 4. An electric vehicle is provided with an emergency battery pack mounting portion, an emergency battery pack connection terminal is provided in the emergency battery pack mounting portion, and the emergency battery pack is detachably attached to the emergency battery pack mounting portion. 2. The battery-powered electric vehicle according to claim 1, wherein the emergency battery pack is attached and a terminal of the emergency battery pack is freely connectable to a terminal for connecting the emergency battery pack. 5. An emergency battery pack mounting portion is provided by providing an insertion groove portion for inserting a part or all of the emergency battery pack into the electric vehicle, and an emergency battery pack connection terminal is provided in the insertion groove portion. The battery-powered electric vehicle according to claim 4, wherein