KR102638199B1 - Battery exchanging system and method for electric-powered wheelchairs - Google Patents

Abstract

The present invention relates to a battery replacement system and method for electric assistive devices. In the battery exchange system of the electric assist device of the present invention, the electric assist device transmits battery information about the replacement time of the battery pack to the backend server, and the battery exchanger transmits usage information about whether the battery charging unit is used and the battery being charged in the battery charging unit. Charging information about the remaining charging time is transmitted to the back-end server, and the back-end server provides battery replacement information about the replacement time of the battery pack and the battery according to the battery replacement information through the battery information, usage information, and charging information. Control information for adjusting the charging speed of the charging unit is generated, the backend server transmits the battery replacement information to the electric appliance, and the control information is transmitted to the battery exchanger to adjust the charging speed of the battery charging unit.

Description

Battery exchanging system and method for electric-powered wheelchairs}

The present invention relates to battery replacement of electric assistive devices. It relates to a battery replacement system and method for electric assistive devices that enable uninterrupted use of the electric assistive device by exchanging it with a pre-charged battery through a battery exchanger when the battery of the electric assistive device is discharged.

Electric assistive device refers to a wheelchair for walking assistance that uses a battery as a power source and has a transmission and braking device. Electric assistive devices may include electric wheelchairs, electric scooters, etc.

Disabled people and the elderly who are unable to walk independently due to congenital or acquired lower extremity damage due to disease, etc., use electric assistive devices when moving. Users can choose between an electric wheelchair and an electric scooter depending on their remaining physical abilities.

These electric assistive devices (electric wheelchairs, electric scooters) are charged with the battery installed in the electric assistive device. When going out, disconnect from the charging jack and use the electric wheelchair. When you return home, change to an indoor wheelchair and plug in the electric wheelchair to charge again.

If the battery is not fully charged when going out, or if the travel distance is long and the travel time is long, the battery may discharge while moving. If the battery is discharged while going out and moving, the electric assist device may stop, causing inconvenience to the user.

There are rapid charging stations for electric devices in each region, but there is a lack of guidance on installation locations and poor management, and they are installed outside, so disabled people and the elderly have to spend time in an exposed state as if sitting in a wheelchair while charging.

In order to solve the problems of the prior art described above, the present invention provides a battery exchange system for electric orthotics that can be charged in a dedicated battery exchanger, standby in a fully charged state, and then used in exchange for a discharged battery.

The purpose of the present invention is to determine the battery replacement time of the electric assistive device in advance and prepare a pre-charged battery through a battery exchanger, rather than charging the electric assistive device by standing it up for a long time in using the electric assistive device and obtaining energy. The aim is to provide a battery exchange system and method for electric assistive devices that enable the electric assistive device to be used without interruption in operation by exchanging it with a pre-charged battery within a short period of time through a battery exchanger when the battery of the electric assistive device is discharged.

The purpose of the present invention is to provide a battery exchange system and method for electric assistive devices that can actively adjust the charging speed only when necessary by increasing the amount of charge applied to the battery being charged in the battery exchanger.

According to a feature of the present invention, the battery replacement system of the electric assistive device of the present invention transmits battery information about the replacement time of the battery installed and in use, and calculates the replacement time of the battery pack using the transmitted battery information. Electric assist device that receives and displays replacement information; It is provided with a battery charging unit, transmits usage information on whether the battery charging unit is in use and charging information on the remaining charging time of the battery pack being charged in the battery charging unit, and receives control information on the charging speed of the battery charging unit. a battery exchanger that controls the charging speed of the battery charging unit; And it is connected to the battery exchanger and the electric appliance that uses the battery exchanger, and the battery replacement information calculated through the battery information received from the electric appliance and the usage information and charging information received from the battery exchanger. It includes a back-end server that transmits the control information to the electric assist device and adjusts the charging speed of the battery charging unit to slow or rapid to the battery exchanger.

The battery charging units are composed of an even number, so that one charger is connected to one battery charging unit, and the two battery charging units and the charger form a group, and switching operates according to the control information between the battery charging units and the charger of each group. Additional connections are made, and through the switching unit, one charger can be connected to one battery charging unit during slow charging, and both chargers included in one set can be connected to one battery charging unit during rapid charging.

The electric assist device transmits the remaining amount information of the battery pack to the back-end server, and the back-end server calculates the expected replacement time for replacement of the battery pack based on the detected remaining amount information of the battery and transmits it to the battery exchanger, After transmitting the scheduled battery replacement time to the battery exchanger, the back-end server may transmit an expected arrival time delay message indicating the impossibility of arriving at the scheduled battery replacement time to the battery exchanger through the back-end server.

The battery exchanger may further be provided with a display unit indicating whether the battery charging unit is in use and a charging state.

In addition, a method of replacing a battery of an electric assistive device according to an embodiment of the present invention includes the steps of the electric assistive device transmitting battery information about replacement time of the battery pack to a backend server; A battery exchanger transmitting usage information on whether the battery charging unit is in use and charging information on the remaining charging time of the battery being charged in the battery charging unit to the back-end server; The back-end server generates battery replacement information about the replacement time of the battery pack and control information for adjusting the charging speed of the battery charging unit according to the battery replacement information through the transmitted battery information, usage information, and charging information. steps; The backend server transmitting the battery replacement information to the electric appliance and transmitting the control information to the battery exchanger; And it may include a step of the battery exchanger adjusting the charging speed of the battery charging unit according to the transmitted control information.

The battery replacement system and method for electric assistive devices according to the present invention described above have the following effects.

According to the battery exchange system and method for electric assistive devices according to the present invention, information is collected from a single battery exchanger and an electric assistive device using the same, and a battery pre-charged through the battery exchanger is prepared using the collected information, When the battery is discharged, you can use the electric assist device without interruption by exchanging it with a pre-charged battery within a short period of time through a battery exchanger.

Accordingly, the user of this battery exchange system can immediately use the discharged electric assist device battery by exchanging it with a battery that is fully charged and waiting in the exchanger. Therefore, the inconvenience of not being able to move and waiting while charging the battery of the electric assist device can be eliminated.

In addition, by collecting information from electric assist devices and battery exchangers, we analyze information on when to replace the battery and the time it takes for the battery to be fully charged, and when necessary, the charging speed of the battery can be adjusted to slow or rapid. It can be used without interruption of operation of the electric assist device due to charging, etc.

Figure 1 is a diagram showing types of electric assistive devices.
Figure 2 is a diagram for explaining battery replacement of an electric assist device according to the present invention.
Figure 3 is a conceptual diagram of the overall configuration of the battery replacement system for electric assistive devices according to the present invention.
Figure 4 is a diagram showing the configuration of a battery exchanger and a back-end server according to an embodiment of the present invention.
Figure 5 is a flowchart showing a method of replacing a battery of an electric assistive device according to an embodiment of the present invention.
Figure 6 is a flowchart showing a battery replacement method for an electric assistive device according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through illustrative drawings. When adding reference numerals to components in each drawing, it should be noted that identical components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

Additionally, in describing the components of embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. When a component is described as being "connected," "coupled," or "connected" to another component, that component may be directly connected or connected to that other component, but there is no need for another component between each component. It should be understood that may be “connected,” “combined,” or “connected.”

First, Figure 1 is a diagram showing the types of electric assistive devices. Figure 2 is a diagram for explaining battery replacement of an electric assist device according to the present invention. Figure 3 is a conceptual diagram of the overall configuration of the battery replacement system for electric assistive devices according to the present invention.

Referring to FIG. 1, the electric assistive device is a walking assistance chair that uses a battery as a power source and has a transmission and braking device, as described above, and may include an electric wheelchair, an electric scooter, etc.

In particular, electric wheelchairs are used when a manual wheelchair cannot be used or when a person lacks the stamina or strength to use a manual wheelchair for a long period of time indoors or outdoors. As a result, the user's mobility ability can be maximized and it can be easily used on outdoor slopes or uneven roads. As shown in Figure 1, there are various types of electric assistive devices, and a user can select and use an electric assistive device that is suitable for his or her body.

Since these electric assistive devices use batteries as their power source, the batteries must be charged before use.

Referring to FIG. 2, the user of the electric assist device 100 replaces the discharged first and second battery packs 22 and 24 with the fully charged first and second replacement battery packs 32 and 34 in the battery exchanger 200. ) can be exchanged for immediate use. Therefore, the inconvenience of not being able to move and waiting while charging the battery of the electric assist device can be eliminated.

A battery exchange system including such a battery exchanger will be described with reference to FIG. 3.

This is a conceptual diagram of the entire configuration according to an embodiment of the battery replacement system for electric assistive devices according to the present invention disclosed in FIG. 3. The overall battery exchange system for electric assistive devices will be described with reference to FIG. 3 as follows.

The battery exchange system of the electric assist device 100 of the present invention includes an electric assist device 100, a battery exchanger 200, and a back-end server 300.

The electric assist device 100 communicates wirelessly with the back-end server 300 and transmits battery information in use to the back-end server 300. Battery information may include information on the total distance driven by the battery pack (cities omitted) currently in use, in addition to basic battery pack remaining capacity information. Based on the information on the total distance driven by the battery pack currently installed and used, the back-end server 300 analyzes it to reflect the driving habits of the user of the electric assist device 100 and uses it as a reference to calculate the battery usage time or driving distance in the future. It can be used as data. For example, assuming that you can drive 40 km with a fully charged battery, if the remaining battery capacity is 50%, the current driving distance should be 20 km, and you can drive another 20 km in the future. However, if the actual driving distance is 10km even though the remaining battery charge is 50%, it is judged that the battery consumption is high due to the user's driving habits, and the control information for this is determined to be only 10km remaining. It is transmitted to the battery exchanger (200).

The electric assist device 100 checks and stores the remaining battery information at preset time intervals or regular cycles, and transmits it to the backend server 300 at preset time intervals or regular cycles.

These battery packs are compatible with various electric wheelchairs and can be fixed by simply installing a bracket (not shown) on the back of the wheelchair to suit the purpose of use. A charging module can be installed at the bottom of the bracket, and it can have a structure that makes it easy to combine/separate a plurality of brackets so that two batteries can be connected and used. For example, the bracket may be connected in a sliding manner.

The battery pack of an electric orthopedic device must have a large capacity because it must secure a driving range in order to be certified as a medical device, while a battery with a small capacity is required for boarding an airplane.

Additionally, in order to be certified as a medical device, two batteries must be connected in parallel to secure capacity. However, because the battery pack is heavy, only one of the two batteries can be installed when boarding an airplane. The two battery packs may include a main battery and a sub-battery. You can check the remaining power of the main battery and if it is low, turn on the sub-battery and use it as a power source.

That is, the electric assist device 100 is equipped with two removable battery packs, and the two battery packs are connected in a parallel structure. Therefore, in some cases, power can be supplied to the electric assist device 100 even if only one battery pack is mounted, and only the usage time is reduced by half.

The battery pack can be a lithium-ion battery that is compatible with various electric assistive devices and can be used interchangeably with electric assistive devices that operate at various voltages such as 24V, 36V, and 48V. In addition, it can be used compatible with various voltages using a DC-DC converter, and can be designed to be compatible with various types of connection jacks that connect battery packs and electric appliances.

Meanwhile, the battery exchanger 200 includes a battery charging unit and can charge the battery pack. Additionally, the battery exchanger 200 may transmit battery usage information and charging information of the battery charging unit. Specifically, the battery exchanger 200 transmits usage information on whether the provided battery charging unit is used and charging information on the remaining charging time of the battery being charged in the battery charging unit to the back-end server 300.

The back-end server 300 generates battery replacement information about the replacement time of the battery and control information for adjusting the charging speed of the battery charging unit according to the battery replacement information through the transmitted battery information, usage information, and charging information. can do.

The back-end server 300 collects remaining battery information from a plurality of electric assistive devices, calculates the driving distance for each of the plurality of electric assistive devices according to the remaining battery information, and derives a battery replacement time. In addition, the back-end server 300 collects the charging information of the spare battery for each of the plurality of battery exchangers, and uses the battery exchange time and the charging information of the spare battery to generate a battery including the battery exchange time and charging information of the spare battery. Replacement information is transmitted to the plurality of electric assist devices.

Figure 4 is a diagram showing the configuration of a battery exchanger and a back-end server according to an embodiment of the present invention.

Referring to FIG. 4, it includes a battery charging unit 210, a charger 220, a switching unit 230, a display unit 240, an exchange communication unit 250, an exchange control unit 260, and a battery connector 270. . In the drawing, the charger 220, switching unit 230, battery connector 270, and battery 400 are shown exposed to the outside for convenience to facilitate structural understanding, but should be understood as being installed inside the battery exchanger 200. something to do.

The battery charging unit 210 consists of at least four slots in which the battery pack 30 is mounted and charged, and it is preferable to configure them in an even number. However, the present invention provides timely control of the charging speed of the battery pack 30 so that a plurality of electric assistive devices 100 can be operated as smoothly as possible with a limited battery pack 30, and accordingly, the battery charging unit 210 is provided. It is desirable to determine the number. The battery charging unit 210 is configured with a groove shape into which the battery pack 30 is inserted and seated on the front of the body (not shown) constituting the battery exchanger 200, and the groove corresponds to the shape of the battery pack 30. It has a shape that becomes An opening and closing part that opens and closes the groove may be formed on the front of the groove. When configuring the opening and closing portion, it is desirable to configure the opening and closing portion to seal the inside of the groove because the battery pack 30 itself may have a problem of deteriorating the lifespan of the battery pack 30 when exposed to moisture.

The battery pack 30 mounted on the battery charging unit 210 is charged by connecting to a charging terminal (not shown) inside the battery charging unit 210, and the charging terminal is connected to the battery connector 270 and the battery connector 270 that are electrically connected to the charger 220. It may be a charging terminal connected to or formed on the battery connector 270 itself. Accordingly, the battery charging unit 210 can be understood as including the battery connector 270, and therefore, in the following description, the battery charging unit 210 will be understood as including the battery connector 270.

The charger 220 is used to charge the battery pack 30 mounted on the battery charging unit 210 and outputs a preset rated capacity according to the capacity of the battery pack 30. For example, when the 10A charger 220 is used, it takes about 2 hours to fully charge the battery pack 30 with a capacity of 20Ah according to the formula below.

Charging speed (h) = battery capacity (Ah) / charger ampere (A)

The switching unit 230 is connected between the battery charging unit 210 and the charger 220. More precisely, it is connected between the battery connector 270 connected to the battery charging unit 210 and the charger 220 to connect the battery connector 270. Switches between and charger 220. The switching operation is performed by the exchange control unit 260, which will be described later, and slow charging and rapid charging of the battery pack 30 can be performed through switching control.

As shown in FIG. 5, the basic battery charging module includes one battery charging unit 210, a battery connector 270 connected thereto, one charger 220, and a connection between the battery connector 270 and the charger 220. It consists of a switching unit 230.

The display unit 240 indicates whether the battery charging unit 210 is in use and the charging state. That is, the display unit is configured on the upper part of the body of the battery exchanger 200 and the battery charging unit 210 in use is displayed on the display unit, or the charging amount and slow and rapid speed of the battery pack 30 mounted on the battery charging unit 210 in use are displayed. It can indicate the remaining charging time, etc. according to . For example, it can be displayed as messages such as ‘Battery charger 1 is slowly charging’, ‘1 hour remaining time for slow charging’, ‘30 minutes remaining time for charging when changing to fast charging’, etc. Alternatively, a lighting part is configured around the perimeter of the battery charging unit 210 in use or on the front of the opening and closing part, and lights up in red when charging or when less than 50% charged, lights up in blue when charged more than 50%, and lights up in green when fully charged. It can be configured to do this. Alternatively, it can be configured so that the guidance voice is output together, and a button unit for outputting the guidance voice may also be provided separately.

The exchange communication unit 250 is configured for mutual wireless communication with the backend server 300, and the battery exchanger 200 receives usage information (S2) indicating whether the battery charging unit 210 is used through the exchange communication unit 250. The battery charging unit 210 transmits charging information (S3) indicating the remaining charging time of the battery being charged to the backend server 300. The usage information (S2) is identification information about the battery charging unit 210 in use and the battery charging unit 210 not in use among the plurality of battery charging units 210. The charging information (S3) may include the remaining time until full charge when slow charging and the remaining time until full charge when changing from slow charge to fast charge.

The exchange control unit 260 checks and stores the above-described usage information and charging information at preset time intervals or at regular intervals, and transmits the stored usage information and charging information to the backend server 300 through the exchange communication unit 250. In addition, the exchange control unit 260 receives control information about the charging speed of the battery charging unit 210 from the backend server 300, which will be described later, and controls the charging speed of the battery charging unit 210. That is, when control information for fast charging is received during slow charging, the switching unit 230 is controlled to change to the fast charging mode, and when control information (R2) for slow charging is received during rapid charging, the switching unit 230 is similarly switched. Control to change to slow charging mode. Control information (R2) and progress according to control information (R2) can be displayed through the display unit 240.

Meanwhile, for slow and rapid charging, the battery charging units 210 are configured in even numbers, so that one charger 220 is connected to one battery charging unit 210, and two battery charging units 210 and one charger 220 are connected to each other. A group is formed so that a switching unit 230 that operates according to control information is connected between the battery charging unit 210 and the charger 220 of each group. At this time, during slow charging through the switching unit 230, one charger 220 is connected to one battery charging unit 210, and during fast charging, two chargers included in one set are connected to one battery charging unit 210 ( 220) are configured so that they are all connected.

The backend server 300 includes a central communication unit 310 and a central control unit 320. Communication is connected between the battery exchanger 200 and a plurality of electric assist devices 100 using the battery exchanger 200 through the central communication unit 310. At this time, the central communication unit 310 and the electric assist device 100 must be connected to each other through wireless communication, and the central communication unit 310 and the switch communication unit 250 may be connected to each other through wireless or wired communication.

The central control unit 320 of the backend server 300 receives, calculates and analyzes the battery information transmitted from each electric assist device 100 and the usage information and charging information transmitted from the battery exchanger 200, and thereby calculates and analyzes the electric assist device 100. The corresponding battery replacement information is transmitted to (100), and control information for adjusting the charging speed of the battery charging unit 210 to slow or rapid is generated and transmitted to the battery exchanger (200). The control information for slow speed and rapid speed is information analyzed based on the above-described battery information, usage information, and charging information.

The battery replacement method of the electric assist device 100 using the battery replacement system of the electric assist device 100 of the present invention described above will be described with reference to FIG. 5, and the basic configuration and operation description are as follows. ), so only the operating status will be explained.

Figure 5 is a flowchart showing a method of replacing the battery of the electric assist device 100 according to an embodiment of the present invention.

Referring to FIG. 5, the electric assist device 100 transmits battery information about the battery replacement time of the electric assist device 100, which is used by mounting two removable battery packs 22 and 24, to the backend server 300 in step S110. send.

In addition, the battery exchanger 200 provides usage information on whether the battery charging unit 210 provided in step S120 is used and charging information on the remaining charging time of the battery packs 22 and 24 being charged in the battery charging unit 210. Transmitted to the backend server 300.

The backend server 300 provides battery replacement information about the replacement time of the battery packs 22 and 24 and the charging speed of the battery charging unit 210 according to the battery replacement information through the battery information, usage information, and charging information transmitted in step S130. Generates control information to adjust.

The backend server 300 transmits the generated battery replacement information to the electric appliance 100 in step S140, and transmits the generated control information to the battery exchanger 200 in step S150.

The battery exchanger 200 adjusts the charging speed of the battery charging unit 210 according to the control information transmitted in step S160. In this case, the battery exchanger 200 selects slow switching for connecting one charger 220 to one battery charging unit 210 and fast switching for connecting two chargers 220 to one battery charging unit 210. It can be done with

Another embodiment of the battery replacement method of the electric assist device 100 will be described with reference to FIG. 6 as follows.

Figure 6 is a flowchart showing a method of replacing the battery of the electric assist device 100 according to another embodiment of the present invention.

Referring to FIG. 6, the electric assist device 100 detects the remaining amount of the battery pack of the electric assist device 100 that is used by mounting two removable battery packs 22 and 24 in step S210, and provides remaining battery amount information in step S215. is transmitted to the backend server 300.

Additionally, the electric assist device 100 calculates the scheduled battery replacement time in step S220. For example, the electric assist device 100 may detect remaining amount information of a battery pack mounted therein and calculate an expected replacement time for battery replacement based on the detected remaining amount information of the battery.

The scheduled battery replacement time represents the time it takes for the electric assist device 100 to arrive at the battery exchanger 200 to replace the battery according to the remaining battery information. Next, the electric assist device 100 transmits the scheduled battery replacement time to the backend server 300 in step S230.

The backend server 300 may derive the battery replacement timing of the first and second discharged battery packs 22 and 24 of each electric assist device 100 in step S235 as follows.

1st electric assist device: Battery replacement required after 1 hour

2nd electric assist device: Battery replacement required after 1 hour and 30 minutes

3rd electric assist device: Battery replacement required after 4 hours

Accordingly, the backend server 300 collects the remaining battery information from the electric assist device 100, and calculates the driving distance for each electric assist device 100 according to the remaining battery information to derive the battery replacement time. .

Additionally, the battery exchanger 200 checks the charging state of the spare battery of the battery exchanger 200 in step S240 and transmits the spare battery charging information to the backend server 300 in step S245.

For example, the battery exchanger 200 is equipped with at least two battery packs, that is, first and second replacement battery packs 32 and 34. The first and second replacement battery packs 32 and 34 have a capacity of 20Ah and use a 10A charger.

Accordingly, if the back-end server 300 continues slow charging while the battery packs 30 of the first battery charging unit 211 and the third battery charging unit 213 that are currently being charged are 50% charged, the backend server 300 will charge 1 battery charger until it is fully charged. Recognize that it will take some time.

Battery installed in the first battery charging unit: Takes 1 hour to fully charge

Battery installed in the third battery charging unit: Takes 1 hour to fully charge

In this case, when one electric appliance (100) exchanges the battery pack after 1 hour, the battery returned by one electric appliance takes 2 hours to charge in slow mode, so the battery pack (30) needs to be replaced after 1 hour and 30 minutes. The battery pack 30 cannot be supplied to other required electric assistive devices 100.

The backend server 300 can collect charging information of the spare battery from the battery exchanger 200. Thereafter, the backend server 300 may transmit an exchange scheduled time arrival request message to the electric assist device 100 to request arrival at the received exchange scheduled time.

If the spare battery of the battery exchanger 200 to replace the battery is not charged, the backend server 300 instructs the battery pack to be fully charged until the electric assist device 100 arrives at the battery exchanger 200. Can be transmitted to the battery exchanger 200.

The battery exchanger 200 checks the scheduled battery replacement time and the charging state of the spare battery, and sends a request message to shorten the scheduled arrival time through the backend server 300 to each electric assist device 100 that transmitted the scheduled battery replacement time. You can decide whether to do it or not.

Meanwhile, after transmitting the scheduled battery replacement time to the battery exchanger 200, the electric assist device 100 sends an expected arrival time delay message indicating the impossibility of arriving at the scheduled battery replacement time through the backend server 300 in step S255. It can be transmitted to the battery exchanger 200.

Thereafter, the backend server 300 may transmit a charging control command to the battery exchanger 200 in step S260.

For example, the backend server 300 can control fast charging or slow charging by switching the switching unit 230 of the battery exchanger 200. Accordingly, the electric assist device 100, which requires replacement of the battery packs 22 and 14, returns all two discharged battery packs 22 and 24 and mounts only the two fully charged battery packs 32 and 34. It is possible to solve the situation where the electric assist device 100 stops operating.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments posted in the present invention are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these examples. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

22, 24: first and second battery packs
32, 34: first and second replacement battery packs
100: Electric assist device 200: Battery exchanger
300: Backend server

Claims (5)

An electric assist device that transmits battery information about the replacement time of the battery in use, and receives and displays battery replacement information about the replacement time of the battery pack calculated using the transmitted battery information;
It is provided with a battery charging unit, transmits usage information on whether the battery charging unit is in use and charging information on the remaining charging time of the battery pack being charged in the battery charging unit, and receives control information on the charging speed of the battery charging unit. a battery exchanger that controls the charging speed of the battery charging unit; and
It is connected to the battery exchanger and the electric appliance that uses the battery exchanger, and the battery replacement information calculated through the battery information transmitted from the electric appliance and the usage information and charging information transmitted from the battery exchanger is provided to the corresponding It includes a back-end server that transmits the control information to the electric assist device and adjusts the charging speed of the battery charging unit to slow or rapid to the battery exchanger,
The electric assist device transmits the remaining amount information of the battery pack to the back-end server, and the back-end server calculates the expected replacement time for replacement of the battery pack based on the detected remaining amount information of the battery and transmits it to the battery exchanger, After transmitting the scheduled battery replacement time to the battery exchanger, transmitting an expected arrival time delay message indicating impossibility of arrival at the scheduled battery replacement time to the battery exchanger through a backend server,
A plurality of brackets are installed and fixed at the rear of the electric assist device, a charging module is installed at the bottom of the bracket, and the battery pack is connected to the bracket in a sliding manner,
The battery pack is a lithium-ion battery that is compatible with the electric appliance that operates at multiple voltages using a DC-DC converter, and is configured to be compatible with the type of connection jack that connects the battery pack and the electric appliance. Battery exchange system for electric assistive devices. According to paragraph 1,
The battery charging units are composed of even numbers, so that one charger is connected to one battery charging unit,
The two battery chargers and the charger form a pair, and a switching unit that operates according to the control information is connected between the battery charger and the charger of each pair,
A battery exchange system for an electric assistive device, characterized in that through the switching unit, one charger is connected to one battery charging unit during slow charging, and both chargers included in a set are connected to one battery charging unit during rapid charging. delete According to claim 1 or 2,
A battery exchange system for an electric assistive device, wherein the battery exchanger is further provided with a display unit indicating whether the battery charging unit is in use and a charging state. In the battery exchange method of the electric assist device in the battery exchange system,
A step of the electric assist device transmitting battery information about replacement time of the battery pack to a backend server;
A battery exchanger transmitting usage information on whether the battery charging unit is in use and charging information on the remaining charging time of the battery being charged in the battery charging unit to the back-end server;
The back-end server generates battery replacement information about the replacement time of the battery pack and control information for adjusting the charging speed of the battery charging unit according to the battery replacement information through the transmitted battery information, usage information, and charging information. steps;
The backend server transmitting the battery replacement information to the electric appliance and transmitting the control information to the battery exchanger; and
A step of the battery exchanger adjusting the charging speed of the battery charging unit according to the transmitted control information,
The electric assist device transmits the remaining amount information of the battery pack to the back-end server, and the back-end server calculates the expected replacement time for replacement of the battery pack based on the detected remaining amount information of the battery and transmits it to the battery exchanger, After transmitting the scheduled battery replacement time to the battery exchanger, transmitting an expected arrival time delay message indicating impossibility of arrival at the scheduled battery replacement time to the battery exchanger through a backend server,
A plurality of brackets are installed and fixed to the rear of the electric assist device, a charging module is installed in the lower part of the bracket, and the battery pack is connected to the bracket in a sliding manner,
The battery pack is a lithium-ion battery that is compatible with the electric appliance that operates at multiple voltages using a DC-DC converter, and is configured to be compatible with the type of connection jack that connects the battery pack and the electric appliance. How to replace the battery of an electric assist device.

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