WO2012138010A1

WO2012138010A1 - Power management system for an electric vehicle using a detachable tablet pc, and electric vehicle including same

Info

Publication number: WO2012138010A1
Application number: PCT/KR2011/003809
Authority: WO
Inventors: 조재명; 권미화; 오영하; 한솔; 조혜민; 조용민
Original assignee: 제이엠씨엔지니어링 주식회사
Priority date: 2011-04-05
Filing date: 2011-05-24
Publication date: 2012-10-11
Also published as: KR101053830B1; KR20110060869A

Abstract

The invention relates to a power management system for an electric vehicle, including an alternator, a multichannel solar charging module, a multichannel converter, a multichannel power supply device, a control circuit, and a tablet PC. The multichannel converter converts first generated voltages generated by the alternator and second generated voltages generated by the multichannel solar charging module in order to generate voltages for charging a battery. The multichannel power supply device is charged with the voltages for charging the battery, supplies a driving voltage, and generates a remaining battery-charge display signal. The control circuit compares the remaining battery-charge display signal with a battery reference signal, and if the remaining charge of a battery is less than a predetermined reference value, stops at least one power consumption means. The tablet PC provides an interface for controlling the operation of the control circuit, and is detachable from an electric vehicle.

Description

Power management system of an electric vehicle using a detachable tablet PC and an electric vehicle including the same

The present invention relates to power management, and more particularly, to a power management system for an electric vehicle using a detachable tablet PC (personal computer) and an electric vehicle including the power management system.

Eco-friendly vehicles are being developed to solve various problems such as environmental regulations, energy security threats and fossil fuel depletion. Among various environmental vehicles of the future that require eco-friendly and high-efficiency advanced technology, research on electric vehicles using electric motors as a driving source is being actively conducted.

In addition to the electric motor, the electric vehicle further includes a battery for supplying power to the electric motor, and may further include various kinds of power consumption means such as a heating and cooling device, an audio device, and a lighting device. The battery must supply power to not only an electric motor but also various power consumption means as described above, and thus a power management system capable of efficiently supplying power to the electric motor and various power consumption means is needed.

One object of the present invention is to provide a power management system of an electric vehicle using a detachable tablet PC capable of performing efficient power management.

Another object of the present invention is to provide an electric vehicle including a power management system of an electric vehicle using the detachable tablet PC.

In order to achieve the above object, the power management system of an electric vehicle according to an embodiment of the present invention is an alternator (alternator), multi-channel solar charging module, multi-channel converter, multi-channel power supply, control circuit and tablet PC (personal computer). The alternator is provided to correspond to the driving wheel of the electric vehicle, and generates a plurality of first generation voltages corresponding to the rotational energy of the driving wheel. The multi-channel solar charging module generates a plurality of second generation voltages by performing photoelectric conversion based on sunlight incident on the electric vehicle. The multi-channel converter converts the plurality of first generation voltages and the plurality of second generation voltages to generate a plurality of battery charging voltages. The multi-channel power supply device is charged based on the plurality of battery charging voltages, supplies driving power to driving motors and power consumption means included in the electric vehicle, and displays a remaining battery indication signal indicating remaining capacity of the battery. Occurs. The control circuit compares the battery remaining amount indication signal with a battery reference signal to operate the power consumption means normally when the remaining capacity of the battery is greater than a predetermined reference value and the remaining capacity of the battery is smaller than the predetermined reference value. In this case, the driving of at least one of the power consumption means is stopped. The tablet PC is connected to the control circuit, provides an interface for the user to control the operation of the control circuit, and is implemented to be detachable to the electric vehicle.

The power management system of the electric vehicle may further include a cradle in which the tablet PC is mounted. The cradle may include a cradle, a charging terminal and a communication cable. The mounting portion may be formed to be recessed to mount the tablet PC. The charging terminal may protrude from the mounting portion to contact the battery terminal of the tablet PC to supply the driving power to the tablet PC. The communication cable may electrically connect the tablet PC and the control circuit.

The multi-channel converter may include a plurality of DC converters configured to convert one of the plurality of first generation voltages and one of the plurality of second generation voltages to generate one of the plurality of battery charging voltages. have. Each of the plurality of DC converters may include a first transform block and a second transform block. The first conversion block can step down one of the plurality of first generation voltages to generate one of the plurality of battery charging voltages. The second conversion block may generate one of the plurality of battery charging voltages by step-down converting one of the plurality of second generation voltages.

The multi-channel power supply device may include a plurality of battery units, a battery comparator, a power controller, a power output unit, and a battery charger. The plurality of battery units respectively generate a battery confirmation signal indicating a detached state of the battery by comparing an output voltage level of a battery with a preset confirmation voltage level, and outputting the output voltage level of the battery to a preset first discharge voltage level; First and second battery discharge signals indicating whether the battery is discharged may be generated as compared with a second discharge voltage level lower than the first discharge voltage level, respectively. The battery comparator may generate a battery comparison signal by comparing the output voltage levels of the batteries sensed by the battery units with each other. The power control unit may generate a battery control signal and the battery level indicator signal based on the battery confirmation signal, the first and second battery discharge signals, and the battery comparison signal. The power output unit may supply the driving power by selecting a battery included in one of the battery units as a power supply battery based on the battery control signal. The battery charger may charge a non-powered battery that is not selected as the power supply battery among the batteries provided in the plurality of battery units, respectively, based on the plurality of battery charging voltages. The power supply battery may be changed in an overlap period in which the activation period of the first battery discharge signal and the deactivation period of the second battery discharge signal overlap.

The first battery discharge signal may be activated when the output voltage level of the battery is lower than the first discharge voltage level and may be deactivated when the output voltage level of the battery is higher than the first discharge voltage level. The second battery discharge signal may be activated when the output voltage level of the battery is lower than the second discharge voltage level, and may be deactivated when the output voltage level of the battery is higher than the second discharge voltage level. The battery confirmation signal may be activated when the output voltage level of the battery is higher than the confirmation voltage level and may be deactivated when the output voltage level of the battery is lower than the confirmation voltage level.

The battery charger may include a voltage detector, a current detector, a charge controller, and a charge current generator. The voltage detector may output a voltage detection result signal by comparing voltages of the batteries included in the plurality of battery units with a reference voltage, respectively. The current detector may output a current detection result signal by comparing the currents of the batteries with a reference current. The charging control unit may generate a pulse width modulation (PWM) signal based on the voltage detection result signal and the current detection result signal. The charging current generator may supply a charging current to the non-powered battery based on the plurality of battery charging voltages and the PWM signal.

The control circuit calculates a moving distance from a current position to a destination when the user inputs a destination of the electric vehicle through the tablet PC, and based on the moving distance and the remaining capacity of the battery, the multi-channel The charging time of the power supply device may be calculated, and the calculation result may be provided through the tablet PC.

In order to achieve the above object, an electric vehicle driven using a driving motor according to an embodiment of the present invention includes a plurality of driving wheels, a plurality of alternators, a multichannel solar charging module, a multichannel converter, Multi-channel power supplies, control circuits and tablet personal computers (PCs). The plurality of driving wheels rotate to correspond to the rotational energy of the driving motor so that the electric vehicle travels. The plurality of alternators are provided to correspond to the plurality of driving wheels, and generate a plurality of first generation voltages corresponding to rotational energies of the plurality of driving wheels. The multi-channel solar charging module generates a plurality of second generation voltages by performing photoelectric conversion based on sunlight incident on the electric vehicle. The multi-channel converter converts the plurality of first generation voltages and the plurality of second generation voltages to generate a plurality of battery charging voltages. The multi-channel power supply device is charged based on the plurality of battery charging voltages, supplies driving power to the driving motor and power consumption means included in the electric vehicle, and displays a remaining battery capacity indicating a remaining capacity of the battery. Generate a signal. The control circuit compares the battery remaining amount indication signal with a battery reference signal to operate the power consumption means normally when the remaining capacity of the battery is greater than a predetermined reference value and the remaining capacity of the battery is smaller than the predetermined reference value. In this case, the driving of at least one of the power consumption means is stopped. The tablet PC is connected to the control circuit, provides an interface for the user to control the operation of the control circuit, and is implemented to be detachable to the electric vehicle.

The power management system of an electric vehicle according to the embodiments of the present invention as described above can efficiently charge the battery even while the electric vehicle is running by using an alternator and a multi-channel solar charging module, and the battery is provided through a multi-channel converter. It can be efficiently charged without generating heat, and the driving power can be stably supplied to the driving motor by controlling the driving of the power consumption means according to the remaining capacity of the battery. Therefore, the driving power can be efficiently supplied and efficient power management can be performed. In addition, by using a detachable tablet PC, the driver can be efficiently provided with various information required for driving the electric vehicle, and the driver can improve convenience and safety in driving the vehicle.

1 is a block diagram showing a power management system of an electric vehicle according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating an example of a tablet PC and a cradle included in the power management system of the electric vehicle of FIG. 1.

3 is a block diagram illustrating an example of a multi-channel converter included in a power management system of an electric vehicle of FIG. 1.

4 is a circuit diagram illustrating an example of a first DC converter included in the multichannel converter of FIG. 3.

FIG. 5 is a block diagram illustrating an example of a multi-channel power supply device included in the power management system of the electric vehicle of FIG. 1.

6 is a block diagram illustrating an example of a battery unit included in the multi-channel power supply of FIG. 5.

FIG. 7 is a block diagram illustrating an example of a battery charger included in the multichannel power supply of FIG. 5.

8 is a view showing an electric vehicle according to an embodiment of the present invention.

With respect to the embodiments of the present invention disclosed in the text, specific structural to functional descriptions are merely illustrated for the purpose of describing embodiments of the present invention, embodiments of the present invention may be implemented in various forms and It should not be construed as limited to the embodiments described in.

As the inventive concept allows for various changes and numerous modifications, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between. Other expressions describing the relationship between components, such as "between" and "immediately between," or "neighboring to," and "directly neighboring to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is described, and that one or more other features or numbers are present. It should be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. .

On the other hand, when an embodiment is otherwise implemented, a function or operation specified in a specific block may occur out of the order specified in the flowchart. For example, two consecutive blocks may actually be performed substantially simultaneously, and the blocks may be performed upside down depending on the function or operation involved.

Referring to FIG. 1, an electric vehicle power management system 100 includes an alternator 110, a multichannel solar charging module 120, a multichannel converter 130, a multichannel power supply 140, and a control. Circuit 150 and tablet PC (personal computer) 160. The power management system 100 of the electric vehicle may further include a cradle 170, a driving motor 180, and power consumption means 190.

The alternator 110 is provided corresponding to a driving wheel (not shown) of the electric vehicle and generates a plurality of first generation voltages ALTV corresponding to the rotational energy of the driving wheel. 1 illustrates one alternator 110 for convenience, the number of alternators may be equal to the number of driving wheels of the electric vehicle according to an embodiment. For example, a typical four-wheeled electric vehicle comprising two front wheels and two rear wheels may include four alternators attached to each drive wheel. In addition, the number of first generation voltages ALTV may be equal to the number of alternators.

The multi-channel solar charging module 120 generates a plurality of second generation voltages SUNV by performing photoelectric conversion based on the sunlight incident on the electric vehicle. The multi-channel solar charging module 120 may include a solar cell panel and a voltage output circuit. In an embodiment, the number of the second generation voltages SUNV may be equal to the number of the first generation voltages ALTV, and the multi-channel solar charging module may depend on the number of the second generation voltages SUNV. The number of channels of 120 may be determined.

The multi-channel converter 130 converts the plurality of first generation voltages ALTV and the plurality of second generation voltages SUNV to generate the plurality of battery charging voltages BCV. For example, the multi-channel converter 130 converts the plurality of first generation voltages ALTV and the plurality of second generation voltages SUNV, which are AC voltages, to convert the plurality of battery charging voltages BCV, which are DC voltages. May occur. As described below with reference to FIG. 3, the multi-channel converter 130 may include a plurality of battery charging voltages based on one of the plurality of first generation voltages ALTV and one of the plurality of second generation voltages SUNV. It may include a plurality of DC converters for generating one of the (BCV). In an embodiment, the number of battery charge voltages BCV may be equal to the number of second generation voltages SUNV and the number of first generation voltages ALTV, respectively.

The multichannel power supply 140 operates based on the first control signal CONB. The multi-channel power supply 140 is charged based on the plurality of battery charging voltages BCV, supplies the driving power POWER_BAT to the driving motor 180 and the power consumption means 190, and the battery remains. A battery remaining indication signal BCIS indicating capacity is generated. In an embodiment, the multi-channel power supply 140 may include a plurality of batteries, and may be implemented by supplying driving power POWER_BAT by alternately at least one of the plurality of batteries. In FIG. 1, one multi-channel power supply 140 is illustrated for convenience, but according to an embodiment, the power management system 100 of the electric vehicle may include a plurality of multi-channel power supplies. Although not shown, the multi-channel power supply 140 may be charged based on a commercial voltage supplied from an external charging module.

The power management system 100 of an electric vehicle according to an embodiment of the present invention may not only charge the multichannel power supply 140 using an external multichannel charging terminal, but also use the alternator 110. The multi-channel power supply unit 140 may be charged even while the electric vehicle is in operation, and the multi-channel power supply unit 140 may be charged at any place where sunlight is incident using the multi-channel solar charging module 120. can do. Therefore, the power management system 100 of the electric vehicle can efficiently supply the driving power (POWER_BAT).

The driving motor 180 rotates the driving wheels by converting electrical energy into kinetic energy based on a driving power source POWER_BAT and a second control signal COND, and allows the electric vehicle to operate. The power consumption means 190 may be all devices that operate based on the third control signal CONP and consume power in addition to the driving motor 180. For example, the driving control device, the audio device, the navigation device, the lighting It may include a device, a heating and cooling device, a speedometer, a tacho meter, a revolution per minute (RPM) meter, a motor for a window, a motor for a wiper, a door-lock motor, and the like.

The control circuit 150 controls the operation of the power consumption means 190 based on the battery remaining amount indication signal BCIS. Specifically, the control circuit 150 compares the battery remaining indication signal BCIS with the battery reference signal to operate the power consumption means 190 normally when the remaining capacity of the battery is greater than a predetermined reference value. If the remaining capacity of less than the predetermined reference value stops driving of at least one of the power consumption means (190). For example, the control circuit 150 may include at least one of the power consumption means 190, for example, a current consumption when the remaining capacity of the battery is about 40% or less of a fully charged capacity (ie, a buffer capacity). It is possible to stop driving of a large air conditioner or the like.

The control circuit 150 may provide first to third control signals CONB, COND, and CONP, and use the multi-channel power supply 140, the driving motor 180, and the RS-485 communication method. Communication with the power consumption means 190 may be performed.

The most important point in the operation of the electric vehicle is to stably supply the driving power (POWER_BAT) to the driving motor 180. If the power consumption means 190 consumes excessive power and the driving power POWER_BAT is not stably supplied to the driving motor 180, the electric vehicle may not operate normally. Therefore, the control circuit 150 checks the remaining capacity of the battery of the multi-channel power supply device 140 in real time to at least one of the power consumption means 190 when the remaining capacity of the battery is less than the predetermined reference value. By stopping the driving of the driving motor 180, the driving power POWER_BAT may be stably supplied to the driving motor 180, and thus the power management system 100 may perform efficient power management.

The tablet PC 160 is connected to the control circuit 150, provides an interface for a user (ie, a driver) to control the operation of the control circuit 150, and is detachable to the electric vehicle. The tablet PC 160 may be directly connected to the control circuit 150 or may be connected to the control circuit 150 through the cradle 170. The cradle 170 may serve to electrically connect the tablet PC 160 and the control circuit 150 and to stably fix the tablet PC 160 to the electric vehicle.

In one embodiment, the tablet PC 160 may provide the user with various information such as the current position of the electric vehicle, the traveling speed, the remaining battery capacity, and the like. For example, when the user inputs the destination of the electric vehicle through the tablet PC 160, the control circuit 150 calculates the moving distance from the current position to the destination, and supplies the moving distance and the multi-channel power supply. The charging time of the multi-channel power supply device 140 is calculated based on the remaining capacity of the battery of the device 140, and the calculation result (ie, the moving distance and the charging time) is provided to the user through the tablet PC 160. You can do that. In performing the above operation, the self chargeable capacity according to the level of the first generation voltage ALTV and the second generation voltage SUNV may be further considered. The tablet PC 160 may display the current consumption of the multi-channel power supply 140 and the remaining battery level as a percentage and a bar graph. The tablet PC 160 checks the remaining battery level of the multi-channel power supply 140 to determine the driving distance of the vehicle. Can be represented.

In one embodiment, the tablet PC 160 may provide the above various information only when the user is a registered user. For example, the tablet PC 160 receives the user's password and / or the user's unique ID, and then, if the input password and / or the ID matches the registered user's password and / or ID, Information can be provided. In another example, the tablet PC 160 may determine whether the user is the registered user by using various methods such as fingerprint recognition or face recognition.

Power management system 100 of an electric vehicle according to an embodiment of the present invention includes a removable tablet PC 160, to efficiently provide a variety of information necessary for the operation of the electric vehicle to the driver driving the electric vehicle. The driver can improve convenience and safety in driving the vehicle.

Referring to FIG. 2, the tablet PC 160 may be, for example, an iPad of Apple Inc. or a Galaxy Tab of Samsung Electronics Co., Ltd., but is not limited thereto, and any type of tablet PCs may be used. It can be one.

The tablet PC 160 may be mounted to the cradle 170. The cradle 170 may be attached to be fixed to the electric vehicle, and may include a cradle 171, a charging terminal 177, and a communication cable 179.

The mounting portion 171 may be formed by recessing the upper surface portion to mount the tablet PC 160. The mounting part 171 may be a space defined by the left and right side walls 173 and the lower wall 175 on the lower side.

The charging terminal 177 may be formed at the lower end side of the mounting portion 171. That is, the charging terminal 177 may protrude from the bottom surface of the cradle 170 of the cradle 170 to be partially exposed to the outside. The charging terminal 177 may be elastically supported to smoothly contact the battery terminal (not shown) of the tablet PC 160. By such contact, the driving power POWER_BAT provided from the multi-channel power supply 140 may be transferred to the tablet PC 160 to drive the tablet PC 160.

The communication cable 179 may electrically connect the tablet PC 160 and the control circuit 150. In one embodiment, the communication cable 179 may be a communication cable of the RS-485 communication method.

Although not illustrated, the cradle 170 may further include fixing means for stably fixing the tablet PC 160. For example, the fixing means may be a locking protrusion formed on the left and right sidewalls 173 of the mounting portion 171, the holder fixedly coupled to one of the left and right sidewalls 173 and selectively bound to the other one It may be.

Referring to FIG. 3, the multi-channel converter 130 may include a plurality of

DC converters

131a, 131b,..., 131n.

The plurality of

DC converters

131a, 131b,..., 131n may include one of the plurality of first generation voltages ALTV1, ALTV2,..., ALTVn and a plurality of second generation voltages SUNV1, SUNV2, One of the plurality of battery charging voltages BCV1, BCV2, ..., BCVn may be generated by converting one of ..., SUNVn. The plurality of

DC converters

131a, 131b,..., 131n includes first to n-

th DC converters

131a, 131b,..., 131n, and the plurality of first generation voltages ALTV1, ALTV2, ..., ALTVn) includes first to nth alternator voltages ALTV1, ALTV2, ..., ALTVn, and a plurality of second generation voltages SUNV1, SUNV2, ..., SUNVn. Includes first to nth solar power voltages SUNV1, SUNV2,..., And SUNVn, and the plurality of battery charging voltages BCV1, BCV2,..., BCVn are first to nth batteries. The charging voltages BCV1, BCV2,..., BCVn may be included. For example, the first DC converter 131a may generate the first battery charge voltage BCV1 by converting the first alternator voltage ALTV1 and the first solar power voltage SUNV1. In one embodiment, the first battery charge voltage BCV1 is generated based on the first alternator battery charge voltage and the first photovoltaic voltage SUNV1 generated based on the first alternator voltage ALTV1. It may include a photovoltaic battery charging voltage.

Referring to FIG. 4, the first DC converter 131a may include a first transform block 1311a and a second transform block 1313a.

The first conversion block 1311a charges the plurality of batteries by stepping down the first alternator voltage ALTV1, which is one of the plurality of first generation voltages ALTV1, ALTV2,..., ALTVn. The first battery charge voltage BCV1 may be one of the voltages BCV1, BCV2, ..., BCVn, and in particular, the first alternator battery charge voltage BCV1a may be generated among the first battery charge voltages BCV1. Can be. The first conversion block 1311a includes one NJM2360 chip U63, a plurality of diodes D27, D29, D30, and D33, and a plurality of resistors R110, R112, R115, R117, R118, R121, R122, and R123. ) And a plurality of capacitors C64, C66, C68, and C70.

The second conversion block 1313a may step-down convert the first photovoltaic voltage SUNV1, which is one of the plurality of second generation voltages SUNV1, SUNV2,..., SUNVn, to charge the plurality of battery charge voltages. The first battery charging voltage BCV1, which is one of (BCV1, BCV2,..., BCVn), may be generated, and particularly, the first solar power battery charging voltage BCV1b may be generated among the first battery charging voltages BCV1. Can be. The second conversion block 1313a includes one NJM2360 chip U65, a plurality of diodes D35, D37, D38, and D41, and a plurality of resistors R126, R128, R130, R132, R134, R136, R138, and R139. ) And a plurality of capacitors C72, C74, C76, and C78. In particular, the diode D30 included in the first conversion block 1311a and the diode D38 included in the second conversion block 1313a are configurations that cannot be identified in a general step-down conversion circuit. , D38 may prevent the voltage charged in the multi-channel power supply 140 from being discharged backward through the first and second conversion blocks 1311a and 1313a.

The first DC converter 131a may include, for example, when the level of the first alternator voltage ALTV1 is higher than the level of the first photovoltaic voltage SUNV1, such as when an electric vehicle is in operation. The first alternator battery charging voltage BCV1a generated in 1311a may be output as the first battery charging voltage BCV1, and in this case, the multi-channel power supply 140 may be connected to the first alternator battery charging voltage BCV1a. Can be charged on the basis. In addition, when the level of the first photovoltaic voltage SUNV1 is higher than the level of the first alternator voltage ALTV1, for example, when the electric vehicle is parked during the day, the first DC converter 131a may have a high level. The first photovoltaic battery charging voltage BCV1b generated by the second conversion block 1313a may be output as the first battery charging voltage BCV1, and in this case, the multi-channel power supply 140 may include the first The battery may be charged based on the photovoltaic battery charging voltage BCV1b. In another example, the multichannel power supply 140 may be charged based on both the first alternator battery charge voltage BCV1a and the first photovoltaic battery charge voltage BCV1b. That is, the first DC converter 131a may efficiently charge the multi-channel power supply 140 without generating heat by selectively generating the first battery charging voltage BCV1 according to a situation.

Although only the first DC converter 131a is illustrated in FIG. 4, the second to n-th DC converters 131b,..., 131n may also have substantially the same structure as the first DC converter 131a. .

Referring to FIG. 5, the multi-channel power supply 140 may include a battery bank 141, a battery comparator 143, a power controller 145, a power output unit 147, and a battery charger 149. have. The battery bank 141 includes first to

nth battery parts

141a, 141b,..., And 141n, and the first to

nth battery parts

141a, 141b,. Since the batteries are included, the battery bank 141 may include n batteries.

The n batteries included in the battery bank 141 may be implemented to be detachable to the first to

nth battery units

141a, 141b,..., 141n, respectively. The multi-channel power supply 140 may determine whether the plurality of batteries are attached or detached, and determine a battery (ie, a power supply battery) to supply driving power POWER_BAT by determining a discharge degree of the plurality of batteries. Whether the batteries are attached or detached and the degree of discharge may be determined based on the output voltage BAT level of the battery included in each of the first to

nth battery parts

141a, 141b,..., 141n.

The first to

nth battery units

141a, 141b,..., 141n respectively generate and output a battery confirmation signal BAT_IN and a battery discharge signal Q_BAT based on the output voltage BAT level of the battery. can do. For example, the first to n-

th battery units

141a, 141b,..., 141n respectively generate a battery confirmation signal BAT_IN by comparing the output voltage BAT level of the battery with a predetermined confirmation voltage level. The battery discharge signal Q_BAT may be generated by comparing the output voltage BAT level of the battery with a preset discharge voltage level.

The battery confirmation signal BAT_IN may indicate a detached state of the battery, and the battery discharge signal Q_BAT may indicate whether the battery is discharged. For example, activation of the battery check signal BAT_IN means that the battery is mounted in the corresponding battery compartment, and deactivation of the battery check signal BAT_IN means that the battery is not mounted in the corresponding battery compartment. Can be. In addition, activation of the battery discharge signal Q_BAT may mean that the battery is discharged, and deactivation of the battery discharge signal Q_BAT may mean that the battery is not discharged.

In one embodiment, the battery confirmation signal BAT_IN may be activated when the output voltage BAT level of the battery is higher than the preset confirmation voltage level, and the output voltage BAT level of the battery is set to the preset voltage. Can be disabled if it is below the confirmation voltage level. In addition, the battery discharge signal Q_BAT may be activated when the output voltage BAT level of the battery is lower than the preset discharge voltage level, and the output voltage BAT level of the battery is higher than the preset discharge voltage level. It can be deactivated if high. In this case, the confirmation voltage level and the discharge voltage level may be variously determined by the user according to a condition required for the driving motor 180 and the power consumption means 190.

The battery comparator 143 may generate the battery comparison signal CMP by comparing the output voltage BAT level of the battery included in the first to

nth battery parts

141a, 141b,..., 141n, respectively. have. The battery comparison signal CMP is provided to the power control unit 145 and may be the basis for generating the battery control signal BAT_CON.

In one embodiment, the battery comparison signal CMP senses an output voltage BAT level of a battery included in each of the first to

nth battery parts

141a, 141b,..., 141n, and compares them with each other. Can be generated. In another embodiment, the battery comparison signal CMP may include battery information having the highest output voltage level among the batteries included in the first to n th

battery parts

141a, 141b,..., 141n and / or the first to n th battery parts. Information on an output voltage level ratio between the batteries included in the

nth battery units

141a, 141b,..., 141n may be included. For example, the battery comparison signal CMP may set the output voltage BAT level of the battery included in the first to

nth battery parts

141a, 141b,..., 141n to the first to nth battery parts 141a. , 141b,..., And 141n may be divided by the sum of output battery (BAT) levels of the battery. In addition, when the battery bank 141 includes only two battery units, the battery comparison signal CMP may be a value obtained by dividing the output voltage BAT level of one battery by the output voltage BAT level of another battery. .

The power control unit 145 receives the first control signal CONB from the control circuit 150 and receives the battery confirmation signal BAT_IN from the first to

nth battery units

141a, 141b,..., 141n, respectively. By receiving the battery discharge signal Q_BAT and receiving the battery comparison signal CMP from the battery comparator 143, the battery control signal BAT_CON and the battery remaining amount display signal BCIS may be generated.

The battery control signal BAT_CON may represent a criterion for selecting a power supply battery among a plurality of batteries included in the battery bank 141. For example, the criterion for selecting the power supply battery is to select a battery having the highest output voltage level among the plurality of batteries as the power supply battery to maximize battery usage time and to secure time for charging the low output voltage batteries. Or a method of selecting a battery having the lowest output voltage level as a power supply battery and discharging it first to select and charge batteries that need to be charged. The selection criteria of the power supply battery may be variously set according to the conditions required for the driving motor 180 and the power consumption means 190. The battery remaining amount indication signal BCIS is provided to the control circuit 150, and the control circuit 150 may control the operation of the power consumption means 190 based on the battery remaining amount indication signal BCIS.

The power output unit 147 selects one of the batteries included in the first to

nth battery units

141a, 141b,..., 141n as a power supply battery based on the battery control signal BAT_CON. The output voltage BAT of the supply battery can be supplied as the driving power supply POWER_BAT. In one embodiment, the power output unit 147 may be composed of switches connected to the first to

nth battery units

141a, 141b,..., 141n of the battery bank 141, respectively. In response to the signal BAT_CON, the switch connected to the battery unit including the power supply battery may be turned on, and the switches connected to other battery units (that is, the non-powered battery) may be turned off. When one battery among the plurality of batteries supplies the driving power POWER_BAT for driving the driving motor 180 and the power consumption means 190, the other batteries may be charged through the battery charging unit 149. .

The battery charger 149 is a power source that is not selected as a power supply battery among the batteries included in the first to

nth battery units

141a, 141b,..., 141n based on the plurality of battery charge voltages BCV. Can charge non-supply batteries. The battery charger 149 may generate a charging current CI for charging the non-powered battery based on the output voltage VB and the output current IB of the non-powered battery. In one embodiment, the battery charger 149 may be implemented in the form of a separate power supply voltage and current detector for balancing the respective batteries so as to prevent overcharging and uniformly charge all the batteries included in the battery bank 141. have. In another embodiment, the battery charger 149 may further include a four-terminal charging module that charges a non-powered battery by using an externally supplied DC power.

As described above, the multi-channel power supply 140 operates based on a plurality of batteries, and supplies a driving power (POWER_BAT) by alternately supplying the plurality of batteries, thereby driving the driving motor due to a lack of power due to battery discharge. 180 and the power consumption means 190 may not solve the problem.

Referring to FIG. 6, the battery unit may include a battery 1411, a discharge detector 1413, and a battery check unit 1415.

The battery 1411 may be any voltage providing device capable of charging, and the battery 1411 may be detachable, and thus the detachable state may be confirmed by the battery checker 1415. The detached state of the battery 1411 may be sensed based on the output voltage BAT level of the battery 1411. The charging operation of the batteries 1411 included in the first to

nth battery parts

141a, 141b,..., 141n may be individually controlled, and the first to

nth battery parts

141a, 141b,... The batteries 1411 included in 141n may be simultaneously charged or sequentially charged based on the output voltage BAT level.

Meanwhile, the battery 1411 may be charged by a four terminal charging module (not shown) having a four terminal network. The four-terminal charging module measures the input voltage, input current, output voltage and output current provided to the battery 1411 through the four-terminal network to control heat generation based on the current output voltage and output current of the battery 1411. You can check the charge level.

The discharge detector 1413 may generate the battery discharge signal Q_BAT by sensing the output voltage BAT level of the battery 1411. When the output voltage BAT level of the battery 1411 is changed as the power of the battery 1411 is provided to the driving motor 180 and / or the power consumption means 190, the discharge detector 1413 When the output voltage BAT level of 1411 is lower than the preset discharge voltage level, the battery discharge signal Q_BAT may be activated. On the other hand, the discharge detector 1413 may change the output voltage BAT level of the battery 1411 as the power of the battery 1411 is provided to the driving motor 180 and / or the power consumption means 190. When the output voltage BAT level of the battery 1411 is higher than the preset discharge voltage level, the battery discharge signal Q_BAT may be deactivated.

In one embodiment, the change of the power supply battery between the batteries 1411 included in the first to

nth battery parts

141a, 141b,..., 141n is performed in an activation period of the battery discharge signal Q_BAT. Can be. In one embodiment, the preset discharge voltage level may be about 4.2V. As such, when the battery discharge signal Q_BAT is activated, the discharge detector 1413 determines that the battery 1411 is discharged to such an extent that it cannot drive the driving motor 180 and / or the power consumption means 190. do. Thereafter, the power control unit 145 is configured to change the power supply battery so that the battery 1411 is completely discharged and the operation of the driving motor 180 and / or the power consumption means 190 is stopped. 147).

In one embodiment, the battery discharge signal Q_BAT may include a first battery discharge signal Q_BAT_1 and a second battery discharge signal Q_BAT_2. That is, the present invention can detect the output voltage BAT level of the battery 1411 based on reference voltages having different discharge voltage levels for the discharge determination. For example, the discharge detector 1413 generates the first battery discharge signal Q_BAT_1 by comparing the output voltage BAT level of the battery 1411 with a preset first discharge voltage level, and generates the first battery discharge signal Q_BAT_1. The second battery discharge signal Q_BAT_2 may be generated by comparing the output voltage BAT level with a second discharge voltage level lower than the preset first discharge voltage level.

The discharge detector 1413 activates the first battery discharge signal Q_BAT_1 when the output voltage BAT level of the battery 1411 is lower than the first discharge voltage level, and output voltage BAT of the battery 1411. When the level is higher than the first discharge voltage level, the first battery discharge signal Q_BAT_1 may be deactivated. In addition, the discharge detector 1413 activates the second battery discharge signal Q_BAT_2 when the output voltage BAT level of the battery 1411 is lower than the second discharge voltage level, and outputs the output voltage of the battery 1411. When the BAT) level is higher than the second discharge voltage level, the second battery discharge signal Q_BAT_2 may be deactivated.

As such, the power of the battery 1411 is provided to the driving motor 180 and / or the power consumption means 190 so that the output voltage BAT level of the battery 1411 is lowered. After Q_BAT_1 is activated first, the second battery discharge signal Q_BAT_2 is activated. In this case, the change of the power supply battery between the batteries 1411 included in the first to

nth battery units

141a, 141b,..., 141n may be performed by the activation period of the first battery discharge signal Q_BAT_1 and the first period. The deactivation period of the battery discharge signal Q_BAT_2 may be overlapped. As such, before the power supply battery is completely discharged, the operation of the driving motor 180 and / or the power consumption means 190 may be stopped by changing the power supply battery to another battery.

As described above, by changing the power supply battery in the overlap period and continuously supplying the power (POWER_BAT) to the electronic device, it is possible to prevent chattering from occurring when the power supply battery is changed. Therefore, the multi-channel power supply 140 may continuously supply a stable power (POWER_BAT).

The battery checker 1415 may generate a battery check signal BAT_IN by checking whether the battery 1411 is currently mounted in each of the first to

nth battery parts

141a, 141b,..., 141n. . In addition, the battery check unit 1415 may initialize the discharge detector 1413 by activating the battery discharge detection initialization signal RST when the battery 1411 is detached and remounted. When the discharge detector 1413 is initialized based on the battery discharge detection initialization signal RST, the previous battery discharge signal Q_BAT may be initialized to a logic state 'low'.

In an embodiment, the discharge detector 1413 may include a plurality of comparators, a plurality of resistors, and a flip-flop. The battery checker 1415 may include a comparator, a plurality of resistors, and a capacitor.

Referring to FIG. 7, the battery charger 149 may be implemented in the form of a separate power voltage and current detector, and includes a voltage detector 1491, a current detector 1493, a charge controller 1495, and a charge current generator 1497. ) May be included.

The voltage detector 1491 may detect the voltage VB of the batteries and output the voltage detection result signal VS, respectively. The voltage detection result signal VS may be used to generate a pulse width modulation (PWM) signal PS output by the charging controller 1495 to control the charging current CI. The voltage detector 1491 may compare the voltage VB of the batteries with a reference voltage and output a voltage detection result signal VS corresponding to the difference. The duty ratio of the charging current CI may be determined based on the magnitude of the voltage detection result signal VS together with the current detection result signal IS.

In an embodiment, the voltage detector 1491 may include a comparator, a plurality of resistors, and a capacitor, and may output the voltage detection result signal VS to the charge controller 1495 through a photo coupler. When the voltage detection result signal VS is output through the photo coupler, the voltage detection unit 1491 and the charging control unit 1495 operate in an electrically insulated state, thereby preventing damage and malfunction of the device.

The current detector 1493 may detect the current IB of the batteries and output the current detection result signal IS, respectively. The current detection result signal IS may be used to generate a PWM signal PS output by the charging control unit 1495 to control the charging current CI. The current detector 1493 may compare the current IB of the batteries with a reference current and output the current detection result signal IS corresponding to the difference. For example, the current detector 1493 may change the current IB of the batteries into a converted voltage in the form of a voltage in order to detect the current IB of the batteries. The comparator may compare the converted voltage with a reference current voltage corresponding to the reference current, and output the current detection result signal IS based on the difference. The duty ratio of the charging current CI may be determined based on the magnitude of the current detection result signal IS together with the voltage detection result signal VS.

In an embodiment, the current detector 1493 may be implemented by including a plurality of comparators, a plurality of resistors, and a plurality of capacitors, and the current detection result signal IS is transferred to the charging controller 1495 through a photo coupler. You can print When the current detection result signal IS is output through the photocoupler, the current detector 1493 and the charge controller 1495 operate in an electrically insulated state, and are arranged in a multi-channel in the multi-channel power supply 140. Since the grounds of the batteries and the ground of the charging control unit 1495 are insulated from each other, damage and malfunction of the device may be prevented.

The charging controller 1495 may output a PWM signal PS for controlling the charging current CI based on the voltage detection result signal VS and the current detection result signal IS. When the charging current CI is output in the PWM form, the charging control unit 1495 may adjust the duty ratio of the charging current CI based on the voltage detection result signal VS and the current detection result signal IS. To this end, the charging controller 1495 may adjust the duty ratio of the PWM signal PS output to the charging current generator 1497. Accordingly, the charging current generator 1497 may output the charging current CI having the same duty ratio as the duty ratio of the PWM signal PS input from the charging control unit 1495, and the charging control unit 1495 The charging current CI may be controlled by the output PWM signal PS.

The charging current generator 1497 may control the charging current CI supplied to the non-powered battery based on the plurality of battery charging voltages BCV and the PWM signal PS. The charging current CI may have a waveform of a PWM form, and the level of the charging current CI may be controlled by adjusting the duty ratio of the charging current CI. The duty ratio may be adjusted by the charge controller 1495, and the charge current generator 1497 may amplify a current corresponding to the adjusted duty ratio and output the amplified current through the diode. To this end, the charging current generator 1497 may include at least one current amplifier.

In one embodiment, the charge current generator 1497 may include a plurality of Bipolar Junction Transistors (BJTs), a plurality of resistors, and a plurality of capacitors, and a PWM signal ( PS) may be input from the charging control unit 1495. When the PWM signal PS is input to the charging current generating unit 1497 through the photo coupler, the charging control unit 1495 and the charging current generating unit 1497 operate in an electrically insulated state, thereby causing damage and malfunction of the device. Can be prevented.

As described above, the voltage detector 1491, the current detector 1493, and the charge current generator 1497 are implemented by including a photo coupler, such that the power supply on the battery side and the power supply on the charge control unit 1495 side are connected to the photo coupler. It can be separated and stable voltage and current detection and battery charging, and by setting the terminal voltage and the reference voltage of the series-connected battery differently for each battery to perform accurate battery balancing, the voltage detection result signal (VB) and Since charging of each battery is performed based on the current detection result signal IB, charging and balancing of batteries can be performed more quickly and stably.

Referring to FIG. 8, the electric vehicle 200 includes a driving motor 280, a plurality of driving

wheels

201a, 201b, 202a, and 202b, a plurality of

alternators

210a, 210b, 210c, and 210d, and multichannel solar light. The charging module 220, the multichannel converter 230, the multichannel power supply 240, the control circuit 250, and the tablet PC 260 are included. The electric vehicle 200 includes a cradle 270, power consumption means 290, a front wheel shaft 201c, a rear wheel shaft 202c, a plurality of

chains

212a, 212b, 212c, 212d, and a motor driving shaft 282. And a transmission 284.

The driving motor 280 converts electrical energy into kinetic energy (that is, rotational energy) based on the driving power source POWER_BAT and the second control signal COND so that the electric vehicle 200 may run. The drive motor 280 rotates the motor drive shaft 282, and the rotational energy of the motor drive shaft 282 is provided to the

drive wheels

201a and 201b through the transmission 284 at an appropriate gear ratio. 8 illustrates the case of the front wheel drive, according to the embodiment, the rotation energy of the motor drive shaft 282 may be provided to the

driving wheels

202a and 202b in the case of the rear wheel drive, and in the case of the four wheel drive, Rotational energy of 282 may be provided to the

drive wheels

201a, 201b, 202a, and 202b.

The plurality of driving

wheels

201a, 201b, 202a, and 202b rotate to drive the electric vehicle 200 in correspondence with the rotational movement of the driving motor 280. The plurality of driving

wheels

201a, 201b, 202a, and 202b are connected to both ends of the front wheel shaft 201c, and rotated when the front wheel shaft 201c rotates to drive the electric vehicle 200 by friction with the ground. The

rear wheels

201a and 201b and rear wheels 202c may include

rear wheels

202a and 202b connected to both ends.

The plurality of

alternators

210a, 210b, 210c, and 210d are attached to the plurality of

drive wheels

201a, 201b, 202a, and 202b, and correspond to the rotational energy of the plurality of

drive wheels

201a, 201b, 202a, and 202b. A plurality of first generation voltages ALTV is generated. The plurality of

alternators

210a, 210b, 210c, and 210d are connected to the front wheel shaft 201c or the rear wheel shaft 202c through one of the plurality of

chains

212a, 212b, 212c, and 212d, and supply rotational energy. I can receive it. For example, the first alternator 210a is connected to the front wheel shaft 201c through the first chain 212a, receives rotational energy of the

front wheels

201a and 201b through the first chain 212a, and front wheels. A generation voltage corresponding to the rotational energy of 201a and 201b may be generated.

The multichannel solar charging module 220 generates a plurality of second generation voltages SUNV by performing photoelectric conversion based on sunlight incident on the electric vehicle 200. The multi-channel converter 230 converts the plurality of first generation voltages ALTV and the plurality of second generation voltages SUNV to generate the plurality of battery charging voltages BCV. The multi-channel power supply 240 operates based on the first control signal CONB, is charged based on the plurality of battery charging voltages BCV, the driving motor 280 and the power consumption means 290. A driving power supply (POWER_BAT) is provided to the battery, and a battery remaining indication signal BCIS indicating a remaining capacity of the battery is generated.

The control circuit 250 compares the battery remaining amount indication signal BCIS with the battery reference signal to operate the power consumption means 290 normally when the remaining capacity of the battery is larger than a predetermined reference value and the remaining capacity of the battery. When the value is smaller than the predetermined reference value, the operation of at least one of the power consumption means 290 is stopped. The power consumption means 290 may be all devices that operate based on the third control signal CONP and consume power in addition to the driving motor 280. The tablet PC 260 is connected to the control circuit 250, provides an interface for the driver to control the operation of the control circuit 250, and is detachable to the electric vehicle 200. The cradle 270 is equipped with a tablet PC 260, and electrically connects the tablet PC 160 and the control circuit 150.

A plurality of

alternators

210a, 210b, 210c, 210d, multichannel solar charging module 220, multichannel converter 230, multichannel power supply 240, control circuit 250, tablet PC 260 ), Cradle 270, drive motor 280 and power consumption means 290 are respectively alternator 110, multichannel solar charging module 120, multichannel converter 130, multichannel power supply of FIG. 1. The supply device 140, the control circuit 150, the tablet PC 160, the cradle 170, the driving motor 180 and the power consumption means 190 may be substantially the same.

In FIG. 8, a four-wheeled electric vehicle 200 including four

driving wheels

201a, 201b, 202a, and 202b is illustrated, but the electric vehicle according to the embodiments of the present invention may have any number of driving wheels. It may be one of various kinds of vehicles such as buses, trucks, vans, passenger cars, SUVs, and the like.

The power management system of an electric vehicle according to embodiments of the present invention may be applied to an electric vehicle to perform efficient power management, and may improve driver convenience and driving safety.

Although the invention has been described above with reference to preferred embodiments, those skilled in the art will be able to variously modify and change the invention without departing from the spirit and scope of the invention as set forth in the claims below. I will understand.

Claims

As a power management system that manages the power of electric vehicles,

An alternator provided to correspond to the driving wheels of the electric vehicle and generating a plurality of first generation voltages corresponding to the rotational energy of the driving wheels;

A multi-channel solar charging module configured to generate a plurality of second power generation voltages by performing photoelectric conversion based on sunlight incident on the electric vehicle;

A multi-channel converter configured to convert the plurality of first generation voltages and the plurality of second generation voltages to generate a plurality of battery charging voltages;

Multi-channel power supply that is charged based on the plurality of battery charging voltages, supplies driving power to drive motors and power consumption means included in the electric vehicle, and generates a remaining battery indication signal indicating a remaining capacity of the battery. Device;

The battery remaining power indication signal and the battery reference signal are compared to operate the power consumption means when the remaining capacity of the battery is greater than a predetermined reference value and the power supply when the remaining capacity of the battery is smaller than the predetermined reference value. A control circuit for stopping driving of at least one of the consuming means; And

And a tablet PC (personal computer) connected to the control circuit and providing an interface for a user to control the operation of the control circuit and detachable to the electric vehicle.
The cradle of claim 1, further comprising a cradle on which the tablet PC is mounted.

A cradle recessed to mount the tablet PC;

A charging terminal protruding from the mounting portion to contact the battery terminal of the tablet PC to supply the driving power to the tablet PC; And

And a communication cable electrically connecting the tablet PC and the control circuit.
The plurality of DCs of claim 1, wherein the multi-channel converter converts one of the plurality of first generation voltages and one of the plurality of second generation voltages to generate one of the plurality of battery charging voltages. Including a converter, each of the plurality of DC converter,

A first conversion block step-down converting one of the plurality of first generation voltages to generate one of the plurality of battery charge voltages; And

And a second conversion block configured to generate one of the plurality of battery charging voltages by step-down converting one of the plurality of second generation voltages.
The apparatus of claim 3, wherein the multi-channel power supply unit,

Comparing an output voltage level of a battery with a preset confirmation voltage level, a battery confirmation signal indicating a detached state of the battery is generated, respectively, and the output voltage level of the battery is a preset first discharge voltage level and the first discharge voltage level. A plurality of battery units respectively generating first and second battery discharge signals indicating whether the battery is discharged compared to a lower second discharge voltage level;

A battery comparator configured to generate a battery comparison signal by comparing the output voltage levels of the batteries sensed by the battery parts with each other;

A power controller configured to generate a battery control signal and the battery remaining amount display signal based on the battery confirmation signal, the first and second battery discharge signals, and the battery comparison signal;

A power output unit for supplying the driving power by selecting a battery included in one of the battery units as a power supply battery based on the battery control signal; And

A battery charging unit configured to charge a non-powered battery not selected as the power supply battery among the batteries provided in the plurality of battery units, respectively, based on the plurality of battery charging voltages;

And the power supply battery is changed in an overlap section in which an activation section of the first battery discharge signal and an inactivation section of the second battery discharge signal overlap.
The method of claim 4, wherein the first battery discharge signal is activated when the output voltage level of the battery is lower than the first discharge voltage level and is deactivated when the output voltage level of the battery is higher than the first discharge voltage level. Become,

The second battery discharge signal is activated when the output voltage level of the battery is lower than the second discharge voltage level, and deactivated when the output voltage level of the battery is higher than the second discharge voltage level,

The battery confirmation signal is activated when the output voltage level of the battery is higher than the confirmation voltage level and is deactivated when the output voltage level of the battery is lower than the confirmation voltage level.
The battery pack of claim 4, wherein the battery charger is:

A voltage detector configured to output a voltage detection result signal by comparing voltages of the batteries provided in the plurality of battery units with a reference voltage, respectively;

A current detector for outputting a current detection result signal by comparing the current of the batteries with a reference current;

A charging controller configured to generate a pulse width modulation (PWM) signal based on the voltage detection result signal and the current detection result signal; And

And a charging current generating unit configured to supply a charging current to the non-powered battery based on the plurality of battery charging voltages and the PWM signal.
The method of claim 1, wherein the control circuit,

When the user inputs the destination of the electric vehicle through the tablet PC, the moving distance from the current position to the destination is calculated, and based on the moving distance and the remaining capacity of the battery, Calculating a charging time and providing the calculation result through the tablet PC.
In an electric vehicle driven using a drive motor,

A plurality of driving wheels rotating to drive the electric vehicle according to the rotational energy of the driving motor;

A plurality of alternators provided to correspond to the plurality of driving wheels and generating a plurality of first generation voltages corresponding to rotational energy of the plurality of driving wheels;

A multi-channel solar charging module configured to generate a plurality of second power generation voltages by performing photoelectric conversion based on sunlight incident on the electric vehicle;

A multi-channel converter configured to convert the plurality of first generation voltages and the plurality of second generation voltages to generate a plurality of battery charging voltages;

A multi-channel power supply that is charged based on the plurality of battery charging voltages, supplies driving power to the driving motor and power consumption means included in the electric vehicle, and generates a battery remaining indication signal indicating a remaining capacity of the battery Feeder;

The battery remaining power indication signal and the battery reference signal are compared to operate the power consumption means when the remaining capacity of the battery is greater than a predetermined reference value and the power supply when the remaining capacity of the battery is smaller than the predetermined reference value. A control circuit for stopping driving of at least one of the consuming means; And

And a tablet PC (personal computer) connected to the control circuit and providing an interface for a user to control the operation of the control circuit and detachable to the electric vehicle.