KR102378188B1 - Mobile charging apparatus for electric vehicles - Google Patents

Abstract

Provided is a mobile charging device for an electric vehicle, which is easily moved, expands a capacity thereof, and is further loaded on a vehicle. The mobile charging device for an electric vehicle comprises a controller module and one or more battery modules. Each battery module comprises a battery pack, a temperature sensor, an arc detection sensor, and four terminals formed on an upper side and a lower side of each battery module. Through this structure, the present invention can be easily expanded from and coupled to one or more battery modules and provides an alarm with respect to real-time monitoring and abnormal operation.

Description

Mobile charging apparatus for electric vehicles

The present invention relates to a mobile charging device for an electric vehicle, and more particularly, to a mobile charging device for an electric vehicle in which battery capacity can be easily expanded and moved.

Recently, as environmental regulations in various parts of the world such as the United States, Europe, and Japan are tightened, interest in electric vehicles is increasing in internal combustion engines that operate engines by burning petroleum. In general, an electric vehicle refers to a vehicle that uses a battery and a motor without using petroleum fuel and an engine.

An electric vehicle is a vehicle that generates driving power by supplying electric energy from a high-voltage battery installed inside to an electric motor, and the battery must be charged through an external power supply. Therefore, a charger for power supply is required. In general, a separate electric vehicle parking area and charger are provided in spaces where a large number of cars are parked, such as apartments and large shopping centers. However, in some cases, when emergency charging of an electric vehicle is required, it may be difficult to operate the vehicle if there is no electric vehicle parking area with a charger installed nearby.

An object of the present invention is to provide a portable charging device for an electric vehicle that is easy to move, can expand capacity, and can be loaded into a vehicle.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be.

A mobile charging device for an electric vehicle according to an embodiment of the present invention for achieving the above object includes: one or more battery modules that are vertically and detachably stacked; and a controller module coupled to the battery module and controlling the battery module. Here, the controller module may provide the electric power stored in the battery module to the electric vehicle through a charging connector and a cable. And, each battery module, a battery pack; a temperature sensor for measuring a temperature of the battery pack; an arc detection sensor for detecting an abnormal operation by collecting ultrasonic waves from the battery pack; a pair of positive terminals connected to the battery pack and formed on upper and lower surfaces of the battery module; a pair of negative terminals connected to the battery pack and formed on upper and lower surfaces of the battery module; a pair of data terminals connected to the temperature sensor to transmit temperature information and formed on upper and lower surfaces of the battery module; and a pair of spare terminals connected to the arc detection sensor to transmit ultrasonic information and formed on upper and lower surfaces of the battery module.

The one or more battery modules may be composed of an upper battery module and a lower battery module stacked vertically, and a positive terminal, a negative terminal, a data terminal and a spare terminal formed on the upper surface of the lower battery module are on the lower surface of the upper battery module. The formed positive terminal, the negative terminal, the data terminal and the preliminary terminal may be respectively coupled to each other, and the battery pack of the lower battery module and the battery pack of the upper battery module may be electrically connected in parallel.

The pair of positive terminals may be located on the same vertical line, the pair of negative terminals may be located on the same vertical line, the pair of data terminals may be located on the same vertical line, and the pair of The preliminary terminal may be positioned on the same vertical line, and the positive terminal, the negative terminal, the data terminal and the preliminary terminal formed on the upper surface may have a ferrous (凸) structure, and the positive terminal, the negative terminal formed on the lower surface, The data terminal and the preliminary terminal may have a concave structure, and the convex structure and the concave structure may be electrically connected through fitting.

The convex (凸) structure may include an annular elastic part formed on the upper surface; and an upper conductive part located in the middle of the elastic part and having a thickness thinner than that of the elastic part, wherein the concave structure includes: a groove formed on the lower surface; and a lower conductive part having a thickness smaller than that of the groove part in the groove part, and the annular elastic part is inserted into the groove part and the upper part is inserted into the groove part by the fitting coupling between the convex structure and the concave structure. The conductive part may be in contact with the lower conductive part to conduct electricity.

The battery module has a rectangular parallelepiped shape, the positive terminal and the negative terminal are arranged side by side along a first edge of the upper surface, and the data terminal and the preliminary terminal are along a second edge opposite to the first edge They can be placed side by side. For safe coupling between terminals when stacking a plurality of battery modules vertically, the distance (X) between the positive terminal and the negative terminal and the adjacent edge among the remaining edges other than the first and second edges is the data terminal and The spare terminal may be different from an interval Y with an adjacent edge among the remaining edges.

The controller module may receive ultrasonic information from each battery module through the spare terminal, and may generate an abnormal operation alarm for the battery module generating ultrasonic waves of 40 to 100 kHz.

The mobile charging device for an electric vehicle includes a plurality of battery modules stacked vertically, and a positive terminal, a negative terminal, a data terminal, and a spare terminal of a concave structure are formed on the lower surface of the battery module located at the lowest end, and each of them A wheel can be inserted and coupled.

Specific details of other embodiments are included in the detailed description and drawings.

As described above, according to the portable charging device for an electric vehicle according to the present invention, there are excellent effects as follows.

First, large-capacity charging is possible by vertically stacking one or more battery modules of the same shape. In general, large-capacity battery packs for charging electric vehicles are heavy, so it is difficult for ordinary people to easily carry or move them. However, the mobile charging device of the present invention can support large-capacity charging by vertically stacking a required number of battery modules with a capacity of several to tens of kWh and electrically connecting them in parallel. Accordingly, the present invention provides a battery module with easy capacity expansion.

Second, each battery module includes a temperature sensor and an arc detection sensor in addition to the battery pack, and senses voltage, current, temperature, ultrasound, etc. of the battery pack and transmits sensing information to the controller module. Therefore, the controller module can monitor the status of each battery pack in real time, detect and prevent battery problems in advance through voltage, current, and temperature information, and discharge or abnormal high voltage current to the battery pack through ultrasonic information. It can provide alarm information about the operation.

Third, coupling between a plurality of battery modules or coupling between a controller module and a battery module is easy. That is, each battery module is generally made in a rectangular parallelepiped shape, and has a positive terminal, a negative terminal, a data terminal, and a spare terminal having a ferrous (凸) structure on the upper surface, and a positive terminal having a concave (凹) structure on the lower surface of the battery module. , a negative terminal, a data terminal and a spare terminal. Therefore, when a plurality of battery modules are stacked, the same terminals between the upper and lower battery modules can be easily and physically or electrically coupled to each other by fitting between the convex structure and the concave structure. For example, the positive terminal of the concave structure formed on the lower surface of the upper battery module is coupled to the positive terminal of the convex structure formed on the upper surface of the lower battery module. Such fitting is also made equally to the negative terminal, the data terminal, and the spare terminal between the upper and lower battery modules.

Also, like the battery module, since the positive terminal, negative terminal, data terminal, and spare terminal of the same concave structure are formed on the lower surface of the controller module, when the controller module is stacked on the battery module, the ferrous type The same terminals can be physically and easily coupled between the upper controller module and the lower battery module by fitting between the structure and the concave structure.

Fourth, it is important to combine the same terminals when stacking a plurality of battery modules or stacking a controller module on a battery module and fitting them together. (Data terminal and spare terminal) are specially regulated to prevent cross-coupling with each other. That is, by making the distance (X) between the electrode terminals (positive terminal and negative terminal) and its adjacent edge different from the spacing (Y) between the remaining terminals (data terminal and preliminary terminal) and its adjacent edge, the electrode terminal (positive electrode) of the upper module By fundamentally eliminating the possibility that the remaining terminals (data terminal and spare terminal) of the lower module are coupled to the terminal and negative terminal), electrical stability is promoted when the module is combined.

Fifth, the present invention not only increases the battery capacity by repeatedly stacking battery modules of the same shape or structure, but also has a concave-type structure formed on the lower surface of the battery module disposed at the bottom, a positive terminal, a negative terminal, and a data terminal And it is possible to increase the mobility by inserting the wheel to the preliminary terminal, and to increase the electrical safety by preventing each terminal from being exposed to the outside.

1 is a perspective view showing a mobile charging device for an electric vehicle according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating the configuration of a mobile charging device for an electric vehicle of FIG. 1 .
3 is a block diagram illustrating the configuration of the controller module of FIG. 1 .
4 is a block diagram illustrating the configuration of the battery module of FIG. 1 .
5 is a perspective view illustrating a controller module according to an embodiment of the present invention.
6 is a bottom view of the controller module of FIG. 5 .
7 is a cross-sectional view of the controller module of FIG. 6 taken along line AA'.
8 is a perspective view illustrating a battery module according to an embodiment of the present invention.
9 is a plan view of the battery module of FIG. 8 .
10 is a cross-sectional view of the battery module of FIG. 9 taken along line BB'.
11 is a bottom view of the battery module of FIG. 8 .
12 is a cross-sectional view of the battery module of FIG. 11 taken along line CC'.
13 is a perspective view showing a wheel according to an embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In the present invention, an electric vehicle is a vehicle using a battery and a motor, for example, a pure electric vehicle (EV, Electric Vehicle), a hybrid electric vehicle (HEV, Hybrid Electric Vehicle), and a plug-in hybrid electric vehicle (PHEV, Plug-in Hybrid Electric Vehicle). It can be understood as a concept including the like.

Hereinafter, the configuration of a mobile charging device for an electric vehicle according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4 . 1 is a perspective view showing a mobile charging device for an electric vehicle according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating the configuration of a mobile charging device for an electric vehicle of FIG. 1 . 3 is a block diagram illustrating the configuration of the controller module of FIG. 1 . 4 is a block diagram illustrating the configuration of the battery module of FIG. 1 .

The mobile charging device 100 for an electric vehicle includes one or more battery modules 120 detachably stacked vertically, and a controller module 110 coupled to the upper part of the battery module 120 and connected to the battery module 120 to control it. includes

The controller module 110 provides the electric power stored in the battery module 120 to the electric vehicle 10 through the charging connector 113 and the cable 112 . That is, when the cable 112 for power transmission is connected to the controller module 110 , and the charging connector 113 formed at the end of the cable 112 is coupled to the vehicle socket of the electric vehicle 10 , the battery module 120 is connected to the battery module 120 . The stored power is transmitted to the electric vehicle 10 through the cable 112 . The controller module 110 includes a battery manager 111 , a positive terminal 114 , a negative terminal 115 , a data terminal 116 , and a spare terminal 117 .

The battery manager 111 monitors the battery state of the battery module 120 in real time and controls charging and discharging of the battery module 120 . The positive terminal 114 and the negative terminal 115 of the controller module 110 are respectively connected to the positive terminal 124 and the negative terminal 125 of the battery module 120, and the power stored in the battery module 120 is It is provided to the electric vehicle 10 through the positive terminal 114 and the negative terminal 115 of the module 110 . In addition, the battery manager 111 collects voltage and current data of each battery pack 121 through the positive terminal 114 and the negative terminal 115 to monitor the battery state in real time.

The data terminal 116 is connected to the data terminal 126 of the battery module 120 , collects battery temperature information measured by each battery module 120 , and transmits it to the battery management unit 111 . In addition, the spare terminal 117 is connected to the spare terminal 127 of the battery module 120 , collects ultrasonic information measured in each battery module 120 and transmits it to the battery management unit 111 .

Although not shown, the controller module 110 may include a separate battery pack therein, and may include a separate cable for charging the battery module 120 .

The battery module 120 includes a battery pack 121 , a temperature sensor 122 , an arc detection sensor 123 , a positive terminal 124 , a negative terminal 125 , a data terminal 126 , and a spare terminal 127 . do.

The battery pack 121 charges and stores electric energy or electric power, and may be composed of, for example, a lithium-ion battery. The battery pack 121 may have a capacity of several to several tens of kWh, for example.

The temperature sensor 122 generates temperature information by measuring the temperature of the battery pack 121 to monitor the battery state, and transmits the unique ID and temperature information of each battery module 120 through the data terminal 126 to the controller module. Send to 110.

The arc detection sensor 123 measures the ultrasonic wave generated from the battery pack 121 to detect discharge of a high-voltage current or an abnormal operation. The arc detection sensor 123 transmits the unique ID and ultrasonic information of each battery module 120 to the controller module 110 through the spare terminal 127 . The controller module 110 receives the unique ID and ultrasonic information of each battery module 120 through the spare terminal 127, and the specific battery module 120 generates an ultrasonic wave of 40 kHz or higher (preferably 40 to 100 kHz). In this case, it is determined that partial discharge has occurred, and an abnormal operation alarm may be generated for the corresponding battery module 120 .

A pair of positive terminals 124 are connected to the battery pack 121 and are formed on the upper and lower surfaces of the battery module 120 . A pair of negative terminals 125 are connected to the battery pack 121 and are formed on the upper and lower surfaces of the battery module 120 . The pair of data terminals 126 are connected to the temperature sensor 122 to transmit temperature information of the battery pack 121 to the controller module 110 , and are formed on the upper and lower surfaces of the battery module 120 . A pair of spare terminals 127 are connected to the arc detection sensor 123 to transmit ultrasonic information, and are formed on the upper and lower surfaces of the battery module 120 .

In this embodiment, two battery modules 120 are vertically stacked under the controller module 110 as an example, but the present invention is not limited to the number of battery modules 120, and one or more battery modules ( 120) may be stacked, and the one or more stacked battery modules 120 are electrically connected to each other in parallel to increase the chargeable capacity as the number of battery modules 120 increases.

Hereinafter, the terminal structure of the controller module according to an embodiment of the present invention will be described in detail with reference to FIGS. 5 to 7 . 5 is a perspective view illustrating a controller module according to an embodiment of the present invention. 6 is a bottom view of the controller module of FIG. 5 . 7 is a cross-sectional view of the controller module of FIG. 6 taken along line AA'.

The positive terminal 114 , the negative terminal 115 , the data terminal 116 , and the spare terminal 117 formed on the lower surface of the controller module 110 are the positive terminal 124a and the negative terminal formed on the upper surface of the battery module 120 . 125a, the data terminal 126a, and the preliminary terminal 127a are physically and electrically coupled to each other.

6 and 7 , the positive terminal 114 , the negative terminal 115 , the data terminal 116 and the spare terminal 117 of the controller module 110 have a concave structure. The positive electrode terminal 114 may include a groove portion 132 formed on the lower surface of the controller module 110 and a lower conductive portion 130 having a thickness smaller than that of the groove portion 132 in the groove portion 132 . Here, the lower conductive part 130 may be made of a magnetic material. 7 shows a cross-section of the positive terminal 114 , the negative terminal 115 , the data terminal 116 , and the preliminary terminal 117 may also have substantially the same concave structure.

Referring to FIG. 5 , the controller module 110 may have an overall rectangular parallelepiped shape, and preferably, a lower surface of the controller module 110 may have a rectangular shape. Referring to FIG. 6 , the positive terminal 114 and the negative terminal 115 may be arranged side by side along a first edge of the lower surface of the controller module 110 , and the data terminal 116 and the spare terminal 117 are the controller Among the lower surfaces of the module 110 , they may be arranged side by side along a second edge opposite to the first edge. For example, the first corner and the second corner may be relatively short corners among the lower surfaces of the rectangular shape. For safe terminal coupling between the controller module 110 and the battery module 120 located thereunder, that is, to induce coupling between the same terminals and prevent coupling between different terminals, each terminal may be formed at a special location. Specifically, the interval between the positive terminal 114 and the negative terminal 115 with an adjacent edge among the remaining edges other than the first and second edges is 'X', and the data terminal 116 and the preliminary terminal 117 are When the interval between the remaining edges and the adjacent edge is 'Y', it is preferable that the interval (X) and the interval (Y) are different from each other. For example, by maintaining the interval (X) smaller than the interval (Y), the data terminal of the controller module 110 ( 116) and the preliminary terminal 117 are laminated and combined, but the coupling position between the terminals is different, so that the coupling between different types of terminals can be fundamentally prevented.

Hereinafter, the terminal structure of the battery module according to an embodiment of the present invention will be described in detail with reference to FIGS. 8 to 12 . 8 is a perspective view illustrating a battery module according to an embodiment of the present invention. 9 is a plan view of the battery module of FIG. 8 , and FIG. 10 is a cross-sectional view of the battery module of FIG. 9 taken along line BB′. 11 is a bottom view of the battery module of FIG. 8, and FIG. 12 is a cross-sectional view of the battery module of FIG. 11 taken along line CC'.

Referring to FIG. 8 , a pair of positive terminals 124a and 124b are formed on the upper and lower surfaces of the battery module 120 , and may preferably be positioned on the same vertical line. A pair of negative terminals 125a and 125b are formed on the upper and lower surfaces of the battery module 120, and may preferably be positioned on the same vertical line. The pair of data terminals 126a and 126b are formed on the upper and lower surfaces of the battery module 120, and may preferably be positioned on the same vertical line. A pair of spare terminals 127a and 127b are formed on the upper and lower surfaces of the battery module 120, and may preferably be positioned on the same vertical line.

9 and 10 , the positive terminal 124a, the negative terminal 125a, the data terminal 126a, and the preliminary terminal 127a formed on the upper surface of the battery module 120 have an iron-type structure. . The negative terminal 125a is located in the middle of the annular elastic part 142 formed on the upper surface of the battery module 120 and the elastic part 142 , and is larger than the elastic part 142 ? It may be composed of an upper conductive part 140 having a thickness. Here, the upper conductive part 140 may be made of a magnetic material. 10 shows a cross-section of the negative terminal 125a, the positive terminal 124a, the data terminal 126a, and the preliminary terminal 127a may also have substantially the same convex structure.

11 and 12 , the positive terminal 124b, the negative terminal 125b, the data terminal 126b and the preliminary terminal 127b formed on the lower surface of the battery module 120 have a concave structure. . The positive terminal 124b may include a groove portion 132 formed on the lower surface of the battery module 120 and a lower conductive portion 130 having a thickness smaller than that of the groove portion 132 in the groove portion 132 . Here, the lower conductive part 130 may be made of a magnetic material. 12 shows a cross-section of the positive terminal 124b, the negative terminal 125b, the data terminal 126b, and the preliminary terminal 127b may also have substantially the same concave structure. As such, the terminals formed on the lower surface of the battery module 120 have substantially the same structure as the terminals formed on the lower surface of the controller module 110 according to their functions.

Since the plurality of vertically stacked battery modules 120 have substantially the same shape and structure as each other, capacity expansion is easy. When two vertically adjacent battery modules 120 are defined as 'upper battery module' and 'lower battery module', a positive terminal 124a, a negative terminal 125a, data formed on the upper surface of the 'lower battery module' The terminal 126a and the preliminary terminal 127a are respectively coupled to the positive terminal 124b, the negative terminal 125b, the data terminal 126b and the preliminary terminal 127b formed on the lower surface of the 'upper battery module'. Accordingly, the battery pack 121 of the 'lower battery module' and the battery pack 121 of the 'upper battery module' are electrically connected in parallel to each other, so that the battery capacity can be expanded.

In addition, the positive terminal 124a, the negative terminal 125a, the data terminal 126a, and the preliminary terminal 127a formed on the upper surface of the 'lower battery module' have an iron-type structure, and of the 'upper battery module' Since the positive terminal 124b, the negative terminal 125b, the data terminal 126b, and the preliminary terminal 127b formed on the lower surface have a concave structure, such a convex structure and a concave type The structures are electrically connected through fittings. The annular elastic part 142 is inserted into the groove part 132 by the fitting of the convex-shaped structure and the concave-shaped structure, and the upper conductive part 140 is in contact with the lower conductive part 130 to conduct electricity. .

Referring to FIG. 8 , the battery module 120 may have an overall rectangular parallelepiped shape, and preferably, upper and lower surfaces of the battery module 120 may have a rectangular shape. 9 and 11 , the positive terminals 124a and 124b and the negative terminals 125a and 125b may be arranged side by side along the first edge of the upper or lower surface of the battery module 120 , and the data terminal 126a , 126b) and the spare terminals 127a and 127b may be arranged side by side along a second corner opposite to the first corner of the upper or lower surface of the battery module 120 . For example, the first edge and the second edge may be a relatively short edge of the upper surface or the lower surface of the rectangular shape. For safe terminal coupling between the upper battery module and the lower battery module, that is, to induce coupling between the same terminals and prevent coupling between different terminals, each terminal may be formed at a special location. Specifically, the interval between the positive terminals 124a and 124b and the negative terminals 125a and 125b with the adjacent edge among the remaining edges other than the first and second edges is referred to as 'X', and the data terminals 126a and 126b and When the interval between the spare terminals 127a and 127b with the adjacent edge among the remaining edges is 'Y', it is preferable that the interval X and the interval Y are different from each other. For example, by keeping the interval X smaller than the interval Y, the data terminal 126b and the spare of the upper battery module are connected to the positive terminal 124a and the negative terminal 125a of the lower battery module due to user's error Even if the terminals 127b are stacked and coupled, the coupling positions between the terminals are different, so that coupling between different types of terminals can be fundamentally prevented.

A wheel of a mobile charging device for an electric vehicle according to an embodiment of the present invention will be described in detail with reference to FIG. 13 . 13 is a perspective view showing a wheel according to an embodiment of the present invention.

The mobile charging device 100 for an electric vehicle of the present invention is composed of a controller module 110 and one or more battery modules 120 vertically stacked thereunder, and a plurality of battery modules 120 having the same shape or structure are repeated. The battery capacity can be expanded by stacking them. On the lower surface of the battery module 120 located at the bottom of the structure composed of one or more battery modules 120, the positive terminal 124b, the negative terminal 125b, and the data terminal ( 126b) and a preliminary terminal 127b are formed. The wheel 200 may be inserted and coupled to each of the terminals of the concave structure through the coupling portion 202 . The lower part of the coupling portion 202 supports the wheel 200 . The upper part of the coupling part 202 is composed of an annular elastic part inserted into the groove part 132 of the lower surface terminals of the battery module 120, and a magnetic part disposed in the middle of the annular elastic part and having a thickness thinner than that of the annular elastic part. When the coupling portion 202 is inserted into the lower terminals of the battery module 120, the lower conductive portions 130 of the lower terminals are magnetically coupled with the magnetic portion of the coupling portion 202 to prevent the wheel 200 from easily detaching. can be prevented

Therefore, the mobile charging device 100 for an electric vehicle can be easily moved through the wheels 200, and the terminals formed on the lower surface of the battery module 120 are not exposed to the outside by the coupling part 202, thereby increasing electrical stability. there is.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing the technical spirit or essential features. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

10: electric car
100: a mobile charging device for electric vehicles
110: controller module
111: battery management unit
112: cable
113: charging connector
114: positive terminal
115: negative terminal
116: data terminal
117: spare terminal
120: battery module
121: battery pack
122: temperature sensor
123: arc detection sensor
124, 124a, 124b: positive terminal
125, 125a, 125b: negative terminal
126, 126a, 126b: data terminal
127, 127a, 127b: spare terminal
130: lower conductive part
132: groove
140: upper conductive part
142: elastic part
200: wheel
202: coupling part

Claims (5)

a plurality of battery modules having the same structure and being vertically and detachably stacked; and a controller module coupled to the battery module and controlling the battery module as a mobile charging device for an electric vehicle,
The controller module provides the electric power stored in the battery module to the electric vehicle through a charging connector and a cable,
Each battery module is
battery pack;
a temperature sensor for measuring a temperature of the battery pack;
an arc detection sensor for detecting whether an arc is discharged by measuring the ultrasonic waves generated from the battery pack without separately generating ultrasonic waves;
a pair of positive terminals connected to the battery pack and formed on upper and lower surfaces of the battery module;
a pair of negative terminals connected to the battery pack and formed on upper and lower surfaces of the battery module;
a pair of data terminals connected to the temperature sensor to transmit temperature information and formed on upper and lower surfaces of the battery module; and
It is connected to the arc detection sensor to transmit ultrasonic information and includes a pair of spare terminals formed on the upper and lower surfaces of the battery module,
The positive terminal, the negative terminal, the data terminal and the spare terminal formed on the upper surface of each battery module have a ferrous (凸) structure, and the lower surface terminal consisting of the positive terminal, the negative terminal, the data terminal and the spare terminal formed on the lower surface of each battery module They have a concave (凹) structure, the convex (凸) structure and the concave (凹) structure is electrically connected through a fitting,
A wheel is coupled to each of the lower terminals of the battery module located at the bottom through a coupling part,
The lower part of the coupling part supports the wheel,
The upper part of the coupling part may include an annular elastic part inserted into the groove part of the lower surface terminals; and a magnetic part disposed in the center of the annular elastic part and having a thickness thinner than that of the annular elastic part,
A mobile charging device for an electric vehicle, characterized in that the lower conductive portion of the lower surface terminals is magnetically coupled with the magnetic portion to prevent separation of the wheel. According to claim 1,
The one or more battery modules are composed of an upper battery module and a lower battery module stacked vertically,
The positive terminal, the negative terminal, the data terminal and the preliminary terminal formed on the upper surface of the lower battery module are respectively coupled to the positive terminal, the negative terminal, the data terminal and the preliminary terminal formed on the lower surface of the upper battery module,
The battery pack of the lower battery module and the battery pack of the upper battery module are electrically connected in parallel. According to claim 1,
The pair of positive terminals are located on the same vertical line, the pair of negative terminals are located on the same vertical line, the pair of data terminals are located on the same vertical line, and the pair of spare terminals are located on the same vertical line. A mobile charging device for electric vehicles, characterized in that 4. The method of claim 3,
The convex (凸) structure may include an annular elastic part formed on the upper surface; and an upper conductive part located in the middle of the elastic part and having a thickness thinner than that of the elastic part,
The concave (凹) structure may include a groove formed on the lower surface; and a lower conductive part having a thickness smaller than that of the groove part in the groove part,
Removable charging for an electric vehicle, characterized in that the annular elastic part is inserted into the groove part by the fitting of the convex structure and the concave-shaped structure, and the upper conductive part is in contact with the lower conductive part to conduct electricity Device. According to claim 1,
The battery module has a rectangular parallelepiped shape, the positive terminal and the negative terminal are arranged side by side along a first edge of the upper surface, and the data terminal and the preliminary terminal are disposed along a second edge opposite to the first edge placed side by side,
For safe coupling between terminals when stacking a plurality of battery modules vertically, the distance (X) between the positive terminal and the negative terminal and the adjacent edge among the remaining edges other than the first and second edges is the data terminal and The mobile charging device for an electric vehicle, characterized in that the spare terminal is different from an interval (Y) with an adjacent edge among the remaining edges.

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