KR102219376B1 - Electric bus battery replacement system and electric bus battery replacement method - Google Patents

Abstract

The present invention is to provide an electric bus battery replacement system and an electric bus battery replacement method, which allow a battery to be automatically replaced in a short time without the help of an external device by making a battery coupling part that can combine or separate batteries in a lower part of an electric bus so that the battery separated from the battery coupling part in a replacement space moves to a charging space by autonomous driving, and by moving the pre-charged battery in the charging space to the replacement space and automatically combining it with the battery coupling part.

Description

Electric bus battery replacement system and electric bus battery replacement method}

The present invention relates to an electric bus battery replacement system and an electric bus battery replacement method, and more particularly, to an electric bus battery replacement system and an electric bus battery replacement method for replacing a battery of an electric bus with a charged battery within a short time. will be.

Electric buses are buses operated using electric energy as a power source, and electric buses have eco-friendly characteristics that do not emit harmful gases compared to conventional buses that use fossil fuels, and their R&D and commercialization are gradually accelerating. There is a trend.

In the conventional method of charging an electric bus, first, there is a method of charging by connecting a wire directly to a battery fixed to a vehicle. In this case, there is a problem in that the electric bus cannot be operated during the charging time, resulting in loss of operation.

As another method, several heavy batteries with a charging capacity of 100 kwh and a weight of 400 kg are installed on the top of the electric bus, and the batteries are separated using an external device installed separately, and the separated batteries are transported to the charging space, and the charged batteries are stored. There is a method of coupling it to the top of the electric bus again using an external device.

In this way, the replacement of the battery connected to the top of the electric bus using an external device handles heavy objects in a high space, resulting in a lot of facilities and high cost, and the high risk of accidents and a lot of replacement time. It is not possible.

In addition, because electric buses are large and heavy, they use about 0.8kwh of electricity for 1km driving and 4 times as much electricity as general passenger cars that use 0.2kwh of electricity for 1km driving. To secure the required driving distance of 500km or more, a battery capacity of 400kwh or more is required.

When charging this with a slow charger of 7 kw per hour using an electric cable, charging time of 57 hours or more is required, and charging time of more than 2 hours is required even when using a fast charger of 200 kw per hour, so the bus cannot be operated during this charging time. Because of this, many problems arise in commercial operation.

In addition, since the high-speed charger generates a huge electric load intensively, it is necessary to newly increase the electricity supply facility to accommodate this, and there is a problem that the power plant efficiency is greatly deteriorated due to extreme load fluctuations as well as the facility not only playing at the time when charging is not performed.

In addition, due to this problem, KEPCO announced that it will gradually increase the electricity rate of high-speed chargers by 2022, which leads to the problem of increasing the charging cost of electric buses, and research and development to solve this problem is urgent.

Republic of Korea Patent Publication No. 10-1402668 (Name of invention: Electric bus battery exchange system, Announcement date: 2014.07.01)

Accordingly, the present invention is to solve the problems of the prior art as described above, and a battery coupling unit capable of mounting a battery in the lower portion of the electric bus, and a mobile battery module separated from the battery coupling unit in the battery replacement space is autonomous It moves to the charging space by driving, and moves other removable battery modules that are pre-charged in the charging space to the battery replacement space and automatically connects to the battery coupling part, so that the battery can be automatically replaced within a short time without the help of external devices. It is an object of the present invention to provide an electric bus battery replacement system and an electric bus battery replacement method.

The problems of the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above-described problem, the electric bus battery replacement system according to the present invention includes a battery coupling part formed under the electric bus, and a mobile battery module detachably coupled to the battery coupling part, wherein the battery coupling The part includes a wire weight module, and the portable battery module includes a wire weight holder module, wherein the wire weight module and the wire weight holder module are coupled and released to detach the portable battery module.

In addition, the wire weight module includes a wire weight, a wire having one end coupled to the wire weight, and a traction motor coupled to the other end of the wire, wherein the wire weight is provided with a wire magnet.

In addition, the wire weight holder module may include a wire weight receiving portion formed at the center of the wire weight holder module to receive the wire weight, and a battery magnet coupled to a lower central portion of the wire weight receiving portion.

Here, the wire weight holder module may further include a sliding cover coupled to both sides of the wire collecting part to open and close the wire collecting part.

In addition, the battery coupling unit may further include a battery fixing unit for fixing the movable battery module when the movable battery module is coupled.

An electric bus battery replacement method according to the present invention is a battery replacement method for an electric bus battery replacement system comprising a battery coupling part formed under the electric bus and a removable battery module detachably coupled to the battery coupling part, A first removable battery module separating step of separating a first movable battery module from the battery coupling unit, a first movable battery module moving step of autonomously moving the separated first movable battery module to a charging space, and in the charging space A first mobile battery module charging step of charging the first mobile battery module, a second mobile battery module moving step of autonomously moving a second mobile battery module previously charged in the charging space to a lower portion of the battery coupling unit, and the A second movable battery module coupling step of coupling the second movable battery module located below the battery coupling part to the battery coupling part, wherein the battery coupling part includes a wire weight module, and the first and second movable batteries Each module includes a wire weight holder module, wherein the wire weight module and the wire weight holder module are coupled and released, so that the first and second removable battery modules are detached.

According to the electric bus battery replacement system and electric bus battery replacement method of the present invention, one or more of the following effects are provided.

First, the battery is automatically separated from the electric bus and moved to the charging space by autonomous driving, and other batteries previously charged in the charging space are moved to the replacement space and automatically connected to the electric bus, so that the battery can be replaced quickly. There is an advantage of increasing the efficiency of bus operation and remarkably improving the spread of electric buses.

Second, by quickly replacing the battery, there is an advantage in that it is possible to solve the inconvenience of not being able to operate the vehicle during the existing charging time, and to increase economic efficiency by reducing driving loss.

Third, there is an advantage in that the cost of charging the battery of the electric bus can be reduced by charging the battery by using the inexpensive surplus electricity generated in the middle of the night, thereby improving economic efficiency.

Fourth, by attaching the heavy-duty battery that was previously installed on the top of the electric bus to the bottom of the electric bus, the center of gravity of the electric bus is lowered to increase driving stability and prevent overturning accidents, as well as to improve the ride comfort of passengers. There is this.

Fifth, there is an advantage in that manufacturing is easy and cost can be reduced because many facilities or equipment are not required.

Sixth, there is also an advantage that it can be used as an ESS (Energy Storage System) device of the national power grid that supplies reserve power to prevent blackout of power plants during the peak demand time of electricity consumption by using the battery separated from the electric bus.

The effects of the present invention are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a schematic view showing an electric bus equipped with a battery replacement system according to an embodiment of the present invention.
2 is a block diagram of a mobile battery module in an electric bus battery replacement system according to an embodiment of the present invention.
3 is a cross-sectional view of a wire weight in an electric bus battery replacement system according to an embodiment of the present invention.
4 is a block diagram of an electric bus battery replacement system according to an embodiment of the present invention.
5 is a flowchart of a method for replacing an electric bus battery according to an embodiment of the present invention.
6 is a view for explaining a first mobile battery module landing step according to an embodiment of the present invention.
7 is a view for explaining a first removable battery module wire weight separation step according to an embodiment of the present invention.
8 is a view for explaining a second movable battery module wire insertion step and a second movable battery module magnet coupling step according to an embodiment of the present invention.
9 is a view for explaining a second mobile battery module wire weight fixing step according to an embodiment of the present invention.
10 is a view for explaining a second mobile battery module position adjustment step according to an embodiment of the present invention.
11 is a view for explaining a second removable battery module insertion step according to an embodiment of the present invention.
12 is a view for explaining a step of fixing a second removable battery module according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

The terms used in this specification are used to describe specific embodiments, and are not intended to limit the present invention. As used herein, the singular form may include a plural form unless the context clearly indicates another case. In addition, when a part of the present specification "includes" a certain component, it means that other components may be further included unless otherwise stated.

Hereinafter, the present invention will be described with reference to the drawings in order to explain the electric bus battery replacement system and the electric bus battery replacement method according to embodiments of the present invention.

1 is a schematic view of an electric bus 100 equipped with a battery replacement system according to an embodiment of the present invention.

Referring to FIG. 1, in order to apply the electric bus battery replacement system according to the present invention to a low-floor bus made with a low floor to make getting on and off the passengers conveniently, a movable battery module 200 is accommodated under the electric bus 100 And form a battery coupling unit 110 that can be mounted.

The low-floor electric bus 100 cannot secure the battery coupling portion 110 because it maintains the bottom surface between the front door and the rear door for getting on and off, but the rear portion of the rear wheel 101 can make the bottom high. A battery coupling unit 110 capable of mounting the movable battery module 200 may be secured using the space.

In addition, although not shown separately, in the case of a solid bus, it is very easy to accommodate the movable battery module 200 under the electric bus 100. Accordingly, a plurality of battery coupling units 110 are formed by additionally utilizing the lower space between the front wheel 102 and the rear wheel 101, and a mobile battery module 200 in which a battery is embedded in each battery coupling unit 110. ), you can easily drive over long distances.

Here, even when the plurality of mobile battery modules 200 are replaced, since each mobile battery module 200 is simultaneously replaced in each battery coupling unit 110, a plurality of Battery replacement is possible. Therefore, even if a plurality of movable battery modules 200 are installed for long-distance driving, it is possible to quickly replace the battery from the charging space, thereby increasing the efficiency of operation.

Meanwhile, before describing the electric bus battery replacement system according to the present invention, a mobile battery module 200 and a wire weight 120, which are essential components required for the operation of the present invention, will be described.

Figure 2 is a configuration diagram of a mobile battery module according to an embodiment of the present invention, Figure 3 is a cross-sectional view of a wire weight according to an embodiment of the present invention.

First, referring to FIG. 2, the mobile battery module 200 has a built-in battery and may be detached from the battery coupling unit 110. The movable battery module 200 includes four mecanum wheels equipped with a motor as wheels 230, supplies power to the motor using electricity from the built-in battery, and advances only by a rotation combination of the wheels 230, You can move backward, move left, move right, turn left, turn right, and move diagonally.

Therefore, by appropriately controlling the rotation direction and speed of each motor according to a signal from the control unit (not shown) of the mobile battery module 200, the mobile battery module 200, which has a weight of about 400kg, is placed under the electric bus 100. It is possible to freely move between the battery replacement space and the charging space on the moving plane 300.

In addition, the mobile battery module 200 is equipped with a camera, sensor, control device, etc., so that the mobile battery module 200 can move between the battery replacement space and the charging space by autonomous driving, thereby reducing the risk of accidents due to the heavy weight of the battery. Can be reduced.

In addition, in this embodiment, although the wheel 230 is installed on the mobile battery module 200, a battery module without wheels 230 is mounted on the mobile unit equipped with the wheel 230 and the mobile unit runs autonomously. It can also be configured by moving between the battery replacement space and the charging space.

In addition, as shown in FIG. 2, the removable battery module 200 may include a wire weight holder module 240 formed at each corner of the upper surface of the removable battery module 200.

The wire weight holder module 240 is a module for connecting the mobile battery module 200 to the wire 130 installed under the electric bus 100 to be described later when the mobile battery module 200 is coupled and separated with the battery coupling unit 110, and It may include a harvesting portion 250, a battery magnet 260, a sliding cover 270.

The wire weight receiving part 250 is formed in the center of the wire weight holder module 240 to accommodate the wire weight 120 to be described later, and a battery magnet 260 made of a permanent magnet is installed in the lower center.

Here, in the wire collecting part 250, a position error of about 100 mm horizontally occurs between the mobile battery module 200 and the battery coupling part 110 when the mobile battery module 200 is combined with the battery combining part 110 Even if it is preferably formed large enough to accommodate the wire weight 120 to be described later.

Sliding cover 270 is coupled to both sides of the wire collecting part 250 to close the upper surface of the wire collecting part 250, and the center of the wire weight 120 to be described later is the wire weight holder module 240 It can be fixed in a specific position of.

Here, the movable battery module 200 operates to open and close the sliding cover 270 and a semicircular depression (not shown) formed under the sliding cover 270 to surround the cylinder of the wire weight 120 to be described later. It may further include a sliding unit (not shown). A detailed description of the semicircular depression will be described later.

Next, referring to FIG. 3, the wire weight 120 may include a cylinder 121, a disk 122, and a wire magnet 160.

The cylinder 121 has an upper end and a lower end open so that the disc 122 and the wire magnet 160 are respectively coupled.

The disk 122 has a disk hole 123 formed in the center so that the wire 130 is inserted, and is coupled to the upper opening of the cylinder 121. Here, the wire fixing unit 124 is coupled to the end of the wire 130 and the disk hole 123 is formed to have a diameter much smaller than that of the wire fixing unit 124 so that the wire fixing unit 124 is the disk 122 By being fixed inside the cylinder 121 by, the wire 130 does not fall out of the cylinder 121 when lifting the removable battery module 200, and the weight of the removable battery module 200 can be transferred to the wire 130. have.

In another embodiment, when the wire 130 is configured as a chain, the chain linkage can be attached to the disk 122, and when the chain is used as the wire 130, the sprocket for the chain is used as a pulley 170. Can be used.

The wire magnet 160 is composed of a permanent magnet and is coupled to the lower opening of the cylinder 121. The wire magnet 160 may be combined with the battery magnet 260 to allow the wire 130 to lift the movable battery module 200.

4 is a block diagram of an electric bus battery replacement system according to an embodiment of the present invention.

Referring to FIG. 4, the electric bus battery replacement system according to the present invention includes a battery coupling unit 110 formed under the electric bus 100 and a mobile battery module detachably coupled to the battery coupling unit 110 ( 200), but the battery coupling unit 110 is provided with a wire weight module 111, the mobile battery module 200 is provided with a wire weight holder module 240, the wire weight module 111 By combining and releasing the wire weight holder module 240, the removable battery module 200 is detached.

The battery coupling unit 110 is formed under the electric bus 100 to secure a space for accommodating the movable battery module 200 and a wire weight module capable of coupling the movable battery module 200 (111) is provided.

The wire weight module 111 is connected to the wire weight 120 and the wire magnet 160 coupled to the wire weight 120, and one end is connected to the wire weight 120, but the other end is a traction motor 150 and It includes a wire 130 connected.

Since the detailed configuration of the wire weight 120 has been described above, it will be omitted here.

Meanwhile, the battery coupling unit 110 may further include a battery fixing unit 190 for more firmly coupling the movable battery module 200 when the movable battery module 200 is coupled. The battery fixing unit 190 is configured in a plate shape and can be moved in a sliding manner to fix the lower portion of the movable battery module 200.

As another method of fixing the removable battery module 200, a cross-shaped fixing hole is installed on the top of the mobile battery module 200, and a cross-shaped battery fixing unit (not shown) is installed in the battery coupling unit 110 to fix the cross-shaped battery. A unit (not shown) may be rotated to fix the movable battery module 200, and if rotated in reverse, the upper portion of the movable battery module 200 may be fixed in such a manner that the fixing is released.

The removable battery module 200 may include a wheel 230 and a wire weight holder module 240, and the wire weight holder module 240 includes a wire weight receiving part 250, a battery magnet 260, and a sliding cover ( 270) may be included.

The battery (not shown) is embedded in the mobile battery module 200 and charged in a charging space through a charging terminal (not shown) provided on the upper part of the mobile battery module 200 or a wireless charging module is mounted to apply a wireless charging method. can do.

Wheels 230 may be composed of mecanum wheels, four are mounted at each corner, and a motor is mounted to each of the mecanum wheels to supply power to the motor using electricity from the battery (not shown), and the wheels ( 230) can move forward, backward, move left, move right, turn left, turn right, and move diagonally.

The wire weight holder module 240 is formed at each corner of the upper surface of the movable battery module 200 to accommodate the wire weight 120.

In addition, the wire weight holder module 240 is formed in the center of the wire weight holder module 240 and is coupled to the lower center of the wire weight receiving unit 250 and the wire weight receiving unit 250 to accommodate the wire weight 120 It may include a battery magnet 260 and a sliding cover 270 coupled to both sides of the wire collecting part 250 to open and close the wire collecting part 250.

The specific operation will be described in the electric bus battery replacement method to be described later.

5 is a flowchart of a method for replacing an electric bus battery according to an embodiment of the present invention.

Referring to Figure 5, the electric bus battery replacement method according to an embodiment of the present invention is the entry step (S100), the first removable battery module separation step (S200), the first mobile battery module moving step (S300), the first The mobile battery module charging step (S400), the second mobile battery module moving step (S500), the second mobile battery module combining step (S600) and the second removable battery module fixing step (S700).

First, in the entry step (S100), the electric bus 100 running with electricity supplied from the first mobile first mobile battery module 200` separates the first mobile battery module 200` and 2 Enter the replacement space to replace with a removable battery module (200``).

Here, the first mobile battery module 200 ′ and the second mobile battery module 200 ′ are mounted on the electric bus 100 and are already charged in the separated battery and the charging space, and then the electric bus 100 This is a name for classifying a battery that is coupled to, and is not limited to a specific battery, and has the same configuration to perform the same function.

That is, the first mobile battery module 200 ′ includes all the mobile battery modules 200 separated from and charged from the battery coupling unit 110, and the second mobile battery module 200 ′ is fully charged and For replacement, it may include all the removable battery modules 200 before moving to the electric bus 100, coupled to the battery coupling unit 110, and separated again. Therefore, it may be referred to as any one of the first and second removable battery modules 200 ′ and 200 ′ according to steps performed by one mobile battery module 200.

In the first movable battery module separation step (S200), the first movable battery module 200 ′ of the electric bus 100 that has entered the replacement space is separated by a movable plane 300 under the battery coupling unit 110.

6 is a view for explaining a first mobile battery module landing step according to an embodiment of the present invention, Figure 7 is a view for explaining the first mobile battery module wire weight separation step according to an embodiment of the present invention to be.

The first removable battery module separation step (S200) may include a first removable battery module landing step (S210) and a first removable battery module wire weight separation step (S220).

As shown in FIG. 6, in the first movable battery module landing step (S210), the traction gear 140 installed under the electric bus 100 is operated by the traction motor 150 to release the wire 130 and the battery is combined. The first movable battery module 200 ′ coupled to the unit 110 is landed on the moving plane 300 of the replacement space.

In addition, in the first movable battery module landing step (S210), a position error does not occur horizontally between the first movable battery module 200 ′ and the battery coupling unit 110 when the first movable battery module 200 ′ lands. Therefore, the horizontal position between the first movable battery module 200 ′ and the battery coupling unit 110 that has landed on the moving plane 300 is exactly the same.

Next, as shown in FIG. 7, in the first mobile battery module wire weight separation step (S220), the sliding cover 270` of the wire weight holder module 240` is opened with a sliding unit (not shown), and the traction gear The wire 130 is wound up with 140 to separate the first movable battery module 200 ′ from the wire weight 120. At this time, the magnetic force of the battery magnet 260 ′ of the first movable battery module 200 ′ and the wire magnet 160 of the wire weight 120 is weaker than the weight of the first movable battery module 200 ′. When 270`) is released, only the wire weight 120 can be sufficiently lifted by the traction force of the traction motor 150. In addition, an electromagnet may be used, or a fixing device for fixing the separate removable battery module 200 may be used.

In the first mobile battery module moving step (S300), the first mobile battery module 200′ separated in the first mobile battery module separation step (S200) moves to the charging space for charging, and charges the first mobile battery module. In step S400, the first mobile battery module 200 ′ is charged in the charging space using electricity supplied from the power plant.

The charging space includes a charging unit in which a charging room in which the first mobile battery module 200 ′ is charged is configured in a vertical multi-stage, and an elevating unit for lifting the first mobile battery module 200 ′ to each charging chamber. Can include. At this time, the first mobile battery module 200 ′ may move to the charging room by autonomous driving.

In addition, when a traction device is installed on the upper part of the charging chamber and the wire weight 120 is connected to the wire weight holder module 240 ′ of the first movable battery module 200 ′, the first movable battery module 200 ′ is lifted. The position of the first mobile battery module 200 ′ is automatically adjusted and inserted into the charging chamber battery coupling unit (not shown) in which the battery charging terminal is installed, and the charging terminal provided at the upper end of the first mobile battery module 200 ′ It can be combined with the charging terminal of the charging compartment battery coupling unit (not shown) to charge, or wireless charging module is installed in the first movable battery module (200`) and the charging compartment battery coupling unit (not shown). It can be charged by applying a charging method.

The charging terminal installed in each charging room is operated by an electronic switch to supply and cut off electricity, and the control device is configured so that charging is performed using inexpensive surplus electricity generated at the power plant's late night hours, and the electric bus 100 The cost of charging the battery can be reduced to increase economic efficiency.

In the second movable battery module moving step (S500), the second movable battery module 200``, which is previously charged in the charging space, is moved to the moving plane 300 under the battery coupling unit 110 located in the replacement space. Let it.

In the second movable battery module coupling step (S600), the second movable battery module 200 ″ located under the battery coupling unit 110 is lifted and coupled to the battery coupling unit 110.

The second movable battery module coupling step (S600) may include a second movable battery module wire connection step (S610), a second movable battery module position adjustment step (S620), and a second movable battery module insertion step (S630). .

In the second movable battery module wire connection step (S610), the wire 130 wound around the traction device is released from the second movable battery module 200 ″ located under the battery coupling unit 110 and lowers the wire weight 120. It is connected to the wire weight holder module 240`` formed in the second removable battery module 200``.

8 is a view for explaining a second movable battery module wire insertion step and a second movable battery module magnet coupling step according to an embodiment of the present invention.

The second movable battery module wire connection step (S610) includes a second movable battery module wire inserting step (S611), a second movable battery module magnet coupling step (S612), and a second movable battery module wire adding-fixing step (S613). It may include.

As shown in Figure 8, in the second movable battery module wire weight insertion step (S611), the wire weight 120 connected to the wire 130 descending from the traction gear 140 through the pulley 170 is transferred to the second movable type. Inserted into the wire weight receiving part (250``) inside the wire weight holder module (240``) formed in the battery module (200``).

In the second movable battery module magnet coupling step (S612), the wire magnet 160 coupled to the wire weight 120 and the battery magnet 260 ″ coupled to the wire weight receiving unit 250 ″ are magnetically combined. Are combined with each other.

The wire magnet 160 and the battery magnet 260 ``are composed of permanent magnets, and when the wire weight 120 is inserted into the wire collecting part 250 ``, it is located in the center of the wire collecting part 250 ``. The battery magnet to be coupled (260 ``) pulls the wire weight 120 suspended from the wire 130 by magnetism, the wire weight 120 is coupled toward the center of the wire weight receiving portion (250 ``). Therefore, even if the size of the wire collecting part 250`` is made large to easily accommodate the wire weight 120 even when a position error occurs, the wire weight 120 is magnetically formed at the center of the wire collecting part 250``. Can be positioned exactly as.

9 is a view for explaining a second mobile battery module wire weight fixing step according to an embodiment of the present invention.

9, in the wire weight fixing step (S613), the sliding cover (270``) provided in the wire weight holder module (240``) closes the wire weight receiving part (250``) The center of 120 is fixed at a specific position of the wire collecting part 250``. That is, when the sliding cover (270``) consisting of two is closed, two semi-circular depressions (not shown) formed in each sliding cover (270``) meet to fix the cylinder 121 of the wire weight 120 A circular depression (not shown) that can be formed is formed, and the circular depression moves to the center of the wire collecting portion 250`` while pushing the cylinder 121 to the wire weight holder module 240``. The center position of the wire weight 120 is fixed.

10 is a view for explaining a second mobile battery module position adjustment step according to an embodiment of the present invention.

Referring to FIG. 10, in the position adjustment step (S620), when the traction gear 140 is operated and the second movable battery module 200 ″ is slowly lifted into the air with the wire 130, the second movable battery module is carried out by gravity. (200``) is automatically adjusted to the position where it is inserted into the battery coupling unit 110 of the electric bus 100, and the pulley 170 connected to the traction gear 140 when the second movable battery module 200`` is coupled. ), the error between the vertical wire center position 180 and the center position of the wire 130 connected to the wire weight holder module 240`` is reduced to within 1mm, and the second movable battery module 200'' is accurately combined with the battery. It is possible to insert into the part 110.

That is, the position error of about 100 mm that may occur when the second mobile battery module 200 ″ stops on the moving plane 300 under the battery coupling unit 110 by autonomous driving is reduced by the wire magnet 160 and the battery magnet ( 260``) by magnetic coupling or use of inclined surfaces and other devices to reduce the position error to less than 10mm, close the sliding cover (270``) of the wire weight holder module (240``) and position less than 1mm It is reduced to an error, and the position is automatically adjusted by gravity due to the weight generated when the wire 130 lifts the second movable battery module 200 ``in the air, and the second movable battery module ( 200``) position accuracy can be secured. As such, it is possible to accurately combine the electric bus 100 and the second mobile battery module 200 ″ through several error reduction steps.

At this time, by arranging the position of the wire weight module 111 to the outside in a diagonal direction and lifting the second movable battery module 200 `` so that the wire 130 is traction with a slope, it is centered by the slope by gravity. The force toward the direction is created, so that the position adjustment of the second movable battery module 200 ″ can be made more quickly and accurately.

11 is a view for explaining a second removable battery module insertion step according to an embodiment of the present invention.

Referring to FIG. 11, in the second removable battery module insertion step (S630), when the second removable battery module 200``, whose position is adjusted, is further towed by the traction device, the battery coupling part 110 of the electric bus 100 Entering into the inside, a completely close contact is made, the rotation of the traction motor 150 is stopped, and the insertion of the second removable battery module 200`` is completed.

Here, according to the electric bus battery replacement method according to the present invention, the wire 130 mounted on the traction device may be made of a metal wire or carbon fiber having high tensile strength, or may be formed of a chain, etc., and the wire 130 It is desirable to make the second movable battery module (200``) in four to have a sufficiently large tension to be lifted.

12 is a view for explaining a step of fixing a second removable battery module according to an embodiment of the present invention.

In the second movable battery module fixing step (S700), the second movable battery module 200`` inserted into the battery coupling part 110 is fixed with the battery fixing unit 190 installed on the lower side of the battery coupling part 110. do.

The battery fixing unit 190 reliably supports the second movable battery module 200 ``, so that the second movable battery module 200 `` is in close contact with the battery coupling unit 110 even with various shocks generated during the driving process. As a device that supports it so as to be possible, various methods including a hinge method as well as the sliding method applied in the present invention can be applied.

On the other hand, it is preferable that the battery fixing unit 190 be installed on two or more facing surfaces of the battery coupling unit 110.

In addition, the electric bus battery replacement method according to the present invention may further include an ESS utilization step of utilizing the first mobile battery module 200 ′ in a charging space as a part of an ESS device that supplies spare power required for a power plant.

An ESS device is a device that stores electricity with a battery and supplies power to the power grid instead of a power plant when necessary. When installed in a charging space using the first removable battery module 200` separated from the electric bus 100, electricity By using the difference between the battery replacement time of the bus 100 and the time when electricity demand occurs at the maximum, it may be configured as a device that supplies spare power for the maximum electricity demand time.

As described above, the electric bus battery replacement method according to the present invention can be applied regardless of the type of all electric buses 100 such as minibuses and articulated buses as well as large electric buses 100.

As described above, a preferred embodiment of the present invention has been illustrated and described with reference to the drawings, but the present invention is not limited to the specific embodiments described above, and the present invention is not departing from the gist of the present invention claimed in the claims. Various modifications can be made by those of ordinary skill in the art to which the invention pertains, and these modifications should not be understood individually from the technical spirit or prospect of the present invention.

100: electric bus 101: rear wheel
102: front wheel 103: rear door
104: front door 110: battery coupling unit
111: wire weight module 120: wire weight
130: wire 140: traction gear
150: traction motor 160: wire magnet
170: pulley
180: vertical wire center position 190: battery fixing unit
200, 200`, 200``: removable battery module
230, 230`, 230``: wheels
240, 240`, 240``: wire weight holder module
250, 250`, 250``: wire collecting part
260, 260`, 260``: battery magnet
270, 270`, 270``: sliding cover
300: moving plane

Claims (6)

A battery coupling part formed under the electric bus; And
Including a removable battery module detachably coupled to the battery coupling portion,
The battery coupling unit includes a wire weight module,
The mobile battery module includes a wire weight holder module,
The electric bus battery replacement system, characterized in that the wire weight module and the wire weight holder module are coupled and released to detach the mobile battery module. The method of claim 1,
The wire weight module,
Wire weight;
A wire having one end coupled to the wire weight; And
Including a traction motor coupled to the other end of the wire,
Electric bus battery replacement system, characterized in that the wire weight is provided with a wire magnet. The method of claim 2,
The wire weight holder module,
A wire weight receiving portion formed at the center of the wire weight holder module to receive the wire weight; And
Electric bus battery replacement system, characterized in that it comprises a battery magnet coupled to the lower center of the wire collecting part. The method of claim 3,
The wire weight holder module,
Electric bus battery replacement system, characterized in that it further comprises a sliding cover coupled to both sides of the wire collecting part to open and close the wire collecting part. The method of claim 1,
The battery coupling part,
Electric bus battery replacement system, characterized in that it further comprises a battery fixing unit for fixing the mobile battery module when the mobile battery module is coupled. In the battery replacement method of an electric bus battery replacement system comprising a battery coupling portion formed under the electric bus and a removable battery module detachably coupled to the battery coupling portion,
A first removable battery module separating step of separating the first removable battery module from the battery coupling unit;
A first mobile battery module moving step of autonomously moving the separated first mobile battery module to a charging space;
A first mobile battery module charging step of charging the first mobile battery module in the charging space;
A second movable battery module moving step of autonomously moving a second movable battery module previously charged in the charging space to a lower portion of the battery coupling unit; And
Including a second movable battery module coupling step of coupling the second movable battery module located under the battery coupling portion to the battery coupling portion,
The battery coupling unit includes a wire weight module, and each of the first and second movable battery modules includes a wire weight holder module, so that the wire weight module and the wire weight holder module are coupled and released to the first and second movable battery modules. 2 Electric bus battery replacement method, characterized in that the removable battery module is detached.

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