KR20190058907A - Power supplier, Vehicle having the power supplier and method for controlling the vehicle - Google Patents

Abstract

The present invention relates to a power supply device which comprises a power conversion unit converting power between a first battery and a second battery, a vehicle having the same, and a controlling method thereof. The controlling method detects drive information of a vehicle, individually detects voltage of the first and second batteries, acquires a power consumption amount of a load connected to the second battery based on the detected drive information when a voltage difference value between a voltage value detected from a first detection unit and a voltage value detected from a second detection unit is within a standard range, and controls the power conversion unit in a bypass mode in order to maintain the voltage of current between the first battery and the second battery when the acquired power consumption amount is less than a reference power consumption amount.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power supplier, a vehicle having the power supplier,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for supplying stable power to various devices, a vehicle having the same, and a control method thereof.

A vehicle is a machine that drives wheels to move on the road.

Such a vehicle controls the start-up using a battery, and when the start-up is completed, an internal combustion engine vehicle (general engine vehicle) that generates mechanical power by burning petroleum fuel such as gasoline and light oil, And eco-friendly vehicles that run on batteries powered by electricity to reduce fuel consumption and emissions.

Here, the eco-friendly vehicle includes an electric vehicle that includes a battery and a motor, which are a rechargeable power source, and that drives the electric wheel motor by rotating the electric motor accumulated in the battery and driving the wheel by using the rotation of the motor, A hybrid vehicle that controls power and electric power of the motor, and a hydrogen fuel cell vehicle.

As described above, the vehicle includes a battery for starting or a battery for supplying starting and driving power, and the battery also supplies power for driving to various devices provided inside the vehicle.

According to one aspect of the present invention, there is provided a power supply apparatus for controlling a bypass mode of a power conversion unit when a voltage difference value between two batteries is within a reference range, a vehicle having the same, and a control method thereof.

Another aspect provides a power supply device for controlling a bypass mode of a power conversion section when the power consumption of the load is less than a reference consumption, a vehicle having the power supply device, and a control method thereof.

According to an aspect of the present invention, a power supply includes: a first detection unit for detecting a voltage of a first battery; A second detection unit for detecting a voltage of the second battery; A power conversion unit that steps down, boosts, or holds the voltage of the current of either the first battery or the second battery; And a control unit for controlling the power conversion unit so that the voltage of the current between the first battery and the second battery is maintained if the voltage difference value between the voltage value detected by the first detection unit and the voltage value detected by the second detection unit is within the reference range, As shown in Fig.

The control unit of the power supply device checks the power consumption of the load connected to the second battery if the voltage difference value between the two batteries is within the reference range. If the determined power consumption is less than the reference power consumption, The power conversion unit is controlled in the bypass mode so that the voltage of the current of

When the voltage difference value of the two batteries is out of the reference range and the voltage value of one of the batteries for charging the first battery and the second battery is lower than the voltage value of the other battery, Controls the part in buck mode.

If the voltage difference value of the two batteries is out of the reference range and the voltage value of one of the batteries for charging the first battery and the second battery is higher than the voltage value of the other battery, Control in boost mode.

The power conversion unit of the power supply device includes a first switching unit connected to the first battery, an inductor connected to the first switching unit, a second switching unit connected between the first switching unit and the inductor and the ground, A third switching unit connected between the second battery and a fourth switching unit connected between the third switching unit and the inductor and the ground.

The power conversion unit of the power supply unit turns on the first switching unit and the third switching unit in the bypass mode, and turns off the second switching unit and the fourth switching unit.

The control unit of the power supply unit controls the pulse width modulation of the third switching unit in the buck mode for charging the first battery and the pulse width modulation of the second switching unit in the boost mode.

The control unit of the power supply unit controls the pulse width modulation of the first switching unit in the buck mode for charging the second battery and the pulse width modulation of the fourth switching unit in the boost mode.

A vehicle according to another aspect includes: a first battery for supplying power to a first load; A second battery for supplying power to the second load; A traveling information detecting unit for detecting traveling information; A power conversion unit that steps down, boosts, or holds the voltage of the current of either the first battery or the second battery; And the power conversion unit is controlled in the bypass mode so that the voltage of the current between the first battery and the second battery is maintained when the obtained power consumption is less than the reference power consumption, .

The vehicle according to another aspect includes: a first detection unit for detecting a voltage of the first battery; And a second detecting section for detecting a voltage of the second battery, wherein the control section determines that the obtained power consumption is less than the reference power consumption amount, and the voltage between the voltage value detected by the first detecting section and the voltage value detected by the second detecting section If the difference value is within the reference range, the power conversion unit is controlled to the bypass mode.

The controller of the vehicle according to the other aspect may be configured such that when the voltage difference value between the two batteries is out of the reference range and the voltage value of any one battery for charging among the first battery and the second battery is lower than the voltage value of the other battery And controls the power conversion unit in the buck mode.

If the voltage difference value of the two batteries is out of the reference range and the voltage value of one of the batteries for charging the first battery and the second battery is higher than the voltage value of the other battery, And controlling the converting unit to the boost mode.

According to another aspect of the present invention, a power conversion unit of a vehicle includes a first switching unit connected to a first battery, an inductor connected to a first switching unit, a second switching unit connected between a contact point of the first switching unit and the inductor, A third switching unit connected between the inductor and the second battery, and a fourth switching unit connected between the third switching unit and the inductor and the ground.

The power conversion unit of the vehicle according to another aspect includes turning on the first switching unit and the third switching unit in the bypass mode, and turning off the second switching unit and the fourth switching unit.

The control portion of the vehicle according to the other aspect includes controlling the pulse width modulation of the third switching portion in the buck mode for charging the first battery and controlling the pulse width modulation of the second switching portion in the boost mode.

The controller of the vehicle according to another aspect controls the duty to be increased by a constant duty at a predetermined time interval in the pulse width modulation control of any one of the third switching unit and the second switching unit.

The control unit of the vehicle according to the other aspect includes controlling the pulse width modulation of the first switching unit in the buck mode for charging the second battery and controlling the pulse width modulation of the fourth switching unit in the boost mode.

The controller of the vehicle according to another aspect includes controlling the duty to be increased by a predetermined duty cycle at a predetermined time interval in the pulse width modulation control of any one of the first switching unit and the fourth switching unit.

The traveling information detecting portion of the vehicle according to another aspect includes at least one of a speed detecting portion for detecting the traveling speed, a steering angle detecting portion for detecting the steering angle of the steering wheel, and a pressure detecting portion for detecting the pressure applied to the brake pedal.

According to another aspect of the present invention, there is provided a control method for a vehicle including a power conversion unit for converting power between a first battery and a second battery, the method comprising: detecting driving information of the vehicle; And when the voltage difference value between the voltage value detected by the first detecting unit and the voltage value detected by the second detecting unit is within the reference range, the power consumption of the load connected to the second battery is acquired based on the detected running information And controls the power conversion unit to be in the bypass mode so that the voltage of the current between the first battery and the second battery is maintained if the obtained power consumption is less than the reference power consumption.

According to another aspect of the present invention, there is provided a control method of a vehicle, wherein a voltage difference value of two batteries is out of a reference range, and a voltage value of one of the first battery and the second battery is less than a voltage value of the other battery The power conversion unit is controlled to be in the buck mode and the power conversion unit is controlled to be in the boost mode if the voltage value of one of the first and second batteries is higher than the voltage value of the other battery .

Controlling the power conversion unit in the bypass mode in the control method of the vehicle according to another aspect includes controlling the turn-on of the switching unit connected in series to both ends of the inductor, and controlling the power conversion unit in the buck mode includes connecting the inductor in series And performing the pulse width modulation control of the switching unit, and controlling the power conversion unit in the boost mode includes performing the pulse width modulation control of the switching unit connected between the inductor and the ground.

Obtaining the power consumption of the load connected to the second battery is performed by confirming whether the running speed of the vehicle is equal to or higher than the reference speed and confirming whether the rotational speed of the steering wheel of the vehicle is equal to or higher than the reference speed and checking whether the braking force of the vehicle is equal to or greater than the reference braking force , And checking whether the shake level of the vehicle is equal to or higher than the reference level.

When the power consumption of the load is less than the reference consumption amount or when the difference value between the voltages of the two batteries is within the reference range, the bypass mode of the power conversion unit is performed to stabilize the battery have.

The present invention can reduce the power loss caused by power conversion by conducting the power conversion unit 100% through the bypass mode. That is, the present invention can increase the power conversion efficiency.

According to the present invention, it is possible to prevent the switching element from being burned out due to the voltage difference between the two batteries, and to prevent the durability of the battery from being reduced due to current exchange between the batteries.

INDUSTRIAL APPLICABILITY The present invention can stably supply power to a plurality of apparatuses (i.e., loads) provided in a vehicle, thereby improving operation efficiency of a plurality of apparatuses.

As described above, according to the present invention, it is possible to improve the quality and commerciality of a power conversion unit and a vehicle having the power conversion unit, to further improve the user's satisfaction, to improve user convenience, reliability and safety of the vehicle, .

1 is an external view of a vehicle body of a vehicle according to an embodiment.
2 is a view illustrating an example of a built-in vehicle body of a vehicle according to an embodiment.
3 is a control configuration diagram of a vehicle according to an embodiment.
4 is a circuit configuration diagram of a power supply unit provided in a vehicle according to an embodiment.
5 is a circuit configuration diagram of a power conversion unit provided in a power supply unit of a vehicle according to an embodiment.
FIG. 6 is a control flowchart of the buck mode and the bypass mode of the power conversion unit when the first battery is charged in the vehicle according to the embodiment.
7 is a circuit control diagram of a bypass mode of a power conversion unit when charging a first battery provided in a vehicle according to an embodiment.
8 is a circuit control diagram of a buck mode of a power conversion unit when charging a first battery provided in a vehicle according to an embodiment.
FIG. 9 is a control flowchart of the boost mode and the bypass mode of the power conversion unit when charging the first battery provided in the vehicle according to the embodiment.
10 is a diagram illustrating an example of a boost mode circuit control of a power conversion unit when charging a first battery provided in a vehicle according to an embodiment.
11 is a circuit control diagram of a buck mode of a power conversion unit when charging a second battery provided in a vehicle according to another embodiment.
FIG. 12 is a circuit control diagram of a boost mode of a power conversion section when charging a second battery provided in a vehicle according to another embodiment; FIG.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an external view of a vehicle body according to an embodiment, FIG. 2 is an internal view of a vehicle body according to an embodiment, and FIG. 3 is a control configuration diagram of a vehicle according to an embodiment.

The vehicle 100 includes a chassis having an exterior 110 and an interior 120 and a chassis 140 on which a mechanical device necessary for traveling to the rest except for the vehicle body is installed.

1, the exterior 110 of the vehicle body includes a front panel 111, a bonnet 112, a roof panel 113, a rear panel 114, front, rear, left and right doors 115, And a window glass 116 which is openably and closably provided on the window glass 115.

The exterior of the vehicle body includes a filler provided at a boundary between window glasses of front, rear, left and right doors, a side mirror providing a driver with a view of the rear of the vehicle 100, And a lamp 117 which performs a function of a signal and communication with the vehicle and the pedestrian.

The enclosure of the vehicle body includes an antenna 118 for performing a wireless vehicle network (V2X: Vehicle to everything) such as communication (V2V) with other vehicles and communication (V2I) with the infrastructure.

Here, the antenna 118 may be provided on the roof panel 113 of the vehicle. In addition, the antenna 118 may be provided on the rear window glass of the vehicle.

2, the interior body 120 of the vehicle body includes a seat 121 on which an occupant sits, a dashboard 122, and a tachometer 120. The tachometer 120 includes a tachometer, a speedometer, a coolant thermometer, a fuel meter, (I.e., cluster 123) in which a door open warning lamp, an engine oil warning lamp, a fuel oil warning lamp, and a fuel shortage warning lamp are arranged, an air conditioner blower A head unit 125 provided in the center fascia 124 and receiving an operation command of the audio equipment and the air conditioner and a head unit 125 provided in the center fascia 124, And a start unit 126 that receives an OFF command.

The vehicle 100 includes a shift lever which is provided on the center pacea 124 and receives an operation position and a parking button which is located around the shift lever or the head unit 125 and receives an operation command of an electronic parking brake device (EPB button).

The vehicle 100 may further include an input unit 127 for receiving operation commands of various functions.

The input unit 127 may be provided in the head unit 125 and the center pacea 124 and may include at least one physical button such as an operation on-off button for various functions, a button for changing setting values of various functions can do.

The input unit 127 may further include a jog dial (not shown) or a touch pad (not shown) for inputting a cursor movement command and a selection command displayed on the display unit of the user interface 130.

Here, the jog dial or the touch pad may be provided in a center fascia or the like.

The vehicle 100 may further include a display unit 128 provided in the head unit 125 for displaying information on functions performed in the vehicle and information input by the user.

The vehicle further includes a user interface 130 for user's convenience.

The user interface 130 may be embedded on the dashboard or embedded.

The user interface 130 may display audio functions, a video function, a navigation function, a broadcast function (DMB function), information on functions performed in the radio function, and information input by a user.

The vehicle chassis 140 is a frame for supporting the vehicle bodies 110 and 120. The vehicle chassis 140 includes front and rear wheels 141 disposed on the front and rear sides, left and right sides of the vehicle, driving forces required for driving the vehicle, A steering device, a braking device for applying a braking force to the front and rear left and right wheels 141, and a suspension device may be provided.

The vehicle 100 includes a steering wheel 142 of a steering device for adjusting the direction of travel, a brake pedal 143 that is pressed by the user in accordance with the braking will of the user, An accelerator pedal 144, and the like.

The vehicle further includes various safety devices for the safety of the driver and the occupant.

Examples of the stabilizing device of the vehicle include an airbag control device for the purpose of safety of a passenger such as a driver in the event of a vehicle collision and various types of safety devices such as an electronic stability control (ESC) There are devices.

The vehicle posture stability control device determines the running condition of the vehicle based on the running speed, the steering angle of the steering wheel, and the braking force, acquires the vehicle posture based on the detected information and the running condition detected by the yaw rate and lateral acceleration sensor, The posture of the vehicle is stabilized by adjusting the braking forces of the plurality of wheels based on the posture of the vehicle.

The vehicle includes an active front steering (AFS), a motor driven power steering (MDPS), a rear wheel steering (RWS), and a vehicle turning steering And Active Roll Stabilization (ARS).

3, the vehicle includes an alternator (i.e., a generator 150), a starter motor 160, a travel information detector 170, a controller 180, a storage 181, and a power supply 200 do.

The alternator 150 is driven by the rotational force of the engine when the vehicle starts running, generates electric power using the driving force, and charges at least one battery by the generated electric power.

The starter motor 160 is powered by at least one battery and is driven by supplied power, and transmits the rotational force generated by the drive to the engine, thereby starting the engine.

The traveling information detecting unit 170 detects the traveling information of the vehicle.

The traveling information detecting unit 170 may include a speed detecting unit that detects the traveling speed of the vehicle, a steering angle detecting unit that detects the steering angle of the steering wheel of the vehicle, and a pressure detecting unit that detects the pressure applied to the brake pedal.

The speed detecting section may include a plurality of wheel speed sensors respectively provided on a plurality of wheels of the vehicle to detect wheel speeds of a plurality of wheels, and may include an acceleration sensor for detecting acceleration of the vehicle.

The speed detection unit may include both a plurality of wheel speed sensors and acceleration sensors.

The steering angle detection unit may include an angular velocity sensor for detecting the angular velocity of the steering wheel.

The traveling information detecting unit may further include a vibration detecting unit for detecting a shaking of the vehicle.

The control unit 180 confirms the running speed corresponding to the detected information detected by the speed detecting unit, recognizes the rotational speed of the steering wheel based on the detected information detected by the steering angle detecting unit, and, based on the detected information detected by the pressure detecting unit The braking force can be recognized.

The control unit 180 can also acquire the information of the road surface on which the vehicle travels based on the control information of the vehicle posture stability control apparatus. In other words, the control unit 180 can predict the vehicle shake level from the road surface information.

The control unit 180 obtains a power consumption amount consumed in various electronic devices (i.e., loads) in the vehicle based on at least one of the traveling speed of the vehicle, the rotational speed of the steering wheel, the braking force and the shake level, It is possible to judge whether the power consumed in the vehicle is high power.

If it is determined that the obtained power consumption is less than the reference consumption amount, the control unit 180 controls the power conversion unit 250 to be in the bypass mode. If the obtained power consumption amount is greater than the reference consumption amount, Control in buck mode.

The control unit 180 checks the voltage value of the first battery based on the detection information detected by the first detection unit 230 and detects the voltage value of the second battery based on the detection information detected by the second detection unit 240 And acquires a difference value between the voltage value of the first battery and the voltage value of the second battery. If the difference value is within the reference range, the power conversion unit 250 is controlled to the bypass mode, And controls the power converter 250 to the boost mode or the buck mode if the obtained difference value is out of the reference range.

The control unit 180 controls the power converter 250 to the bypass mode if the obtained power consumption is less than the reference consumption and the difference between the voltages of the first and second batteries is within the reference range.

The control unit 180 controls the power conversion unit 250 to be in the boost mode or the buck mode if the obtained power consumption is equal to or greater than the reference consumption amount, or if the difference value of the voltages of the first and second batteries is out of the reference range.

The controller 180 predicts the power consumption of the first load L1 connected to the first battery and determines whether the first battery is charged based on the predicted power consumption of the first load, The power consumption of the load L2 is predicted and the second battery is charged based on the predicted power consumption of the second load.

When the voltage of the first battery is lower than the second battery voltage, the controller 180 controls the power converter to operate in the buck mode. When the voltage of the first battery is higher than the second battery voltage, the controller 180 controls the power converter Control in boost mode.

When the voltage of the second battery is lower than the first battery voltage, the controller 180 controls the power converter to the buck mode. When the voltage of the second battery is higher than the first battery voltage, the controller 180 controls the power converter Control in boost mode.

The control unit 180 controls the ON operation of the first switching unit and the second switching unit provided in the converting unit of the power converting unit when the power converting unit 250 is controlled in the bypass mode.

The control unit 180 may control the power conversion unit 250 to be in a boost mode or a buck mode in order to charge any one of the first and second batteries. , The second switching unit, the third switching unit, and the fourth switching unit.

The control unit 180 performs soft start by gradually increasing the duty in the pulse width modulation (PWM) control of any one of the switching units. This prevents breakage of the switching part during the initial boost operation.

The control operation of the power conversion unit by the control command of the control unit 180 will be described later.

The control unit 180 can recognize the charged state of the battery based on the detected current value of the battery and recognize the charged state of the battery based on the detected current value and the voltage value of the battery. It is also possible to recognize the state of charge (SOC) of the battery based on the value, the voltage value, and the temperature value.

That is, the control unit 180 can recognize the charging states of the first and second batteries based on the battery sensing information detected by the first and second detecting units, and control the operation of the alternator based on the charging states of the first and second batteries Do.

The control unit 180 includes a memory (not shown) for storing data for a program reproducing an algorithm or an algorithm for controlling the operation of components in the vehicle, and a processor (not shown) for performing the above- Not shown). At this time, the memory and the processor may be implemented as separate chips. Alternatively, the memory and the processor may be implemented on a single chip.

The control unit 180 may be a control unit provided in the power supply apparatus 200. At this time, the control unit provided in the power supply apparatus can communicate with the traveling information detecting unit and receive the traveling information from the traveling information detecting unit.

It is also possible that the control unit provided in the electric power supply apparatus communicates with the electronic control unit (ECU) of the vehicle and receives the traveling information detected by the traveling information detecting unit 170 from the electronic control unit.

The storage unit 181 stores a reference range, a first reference value, a second reference value, and a reference consumption amount.

The reference range may include values between the first set value and the second set value.

Here, the first set value may be a value larger than the first reference value, and the second set value may be a value smaller than the second reference value.

The first reference value may be a negative value, and the second reference value may be a positive value.

The storage unit 181 may store a state of charge of the battery corresponding to at least one of a current value, a voltage value, and a temperature value of the battery as a table.

The storage unit 181 may be a memory implemented in a chip separate from the processor described above in connection with the controller 180, and may be implemented as a single chip with the processor.

The storage unit 181 may be a nonvolatile memory device such as a cache, a read only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM) (Random Access Memory), or a storage medium such as a hard disk drive (HDD) and a CD-ROM. However, the present invention is not limited thereto.

The electric power supply apparatus 200 may include a terminal provided in the vehicle 100, an audio apparatus, an indoor unit, a starting motor, an active front steering (AFS), a motor driven power steering (MDPS) (RWS), and Active Roll Stabilization (ARS), and other electronic devices to supply drive power to each electronic device. Such a power supply unit will be described with reference to Fig.

4 is a circuit configuration diagram of a power supply unit provided in a vehicle according to an embodiment.

4, the power supply 200 includes first and second batteries 210 and 220, a first detection unit 230, a second detection unit 240, and a power conversion unit 250.

The first and second batteries 210 and 220 are chargeable and dischargeable batteries.

The first battery 210 may supply electric power to the starter motor 160 and may be supplied with power from the alternator 150 to charge the battery. It is also possible.

The first battery 210 may be connected to the alternator 150 and the starter motor 160 and may be connected to a basic load L1 of the vehicle such as a terminal, ). ≪ / RTI >

The first battery 210 can supply current to various electronic devices regardless of whether the power is turned on or off so that basic operations of various electronic devices provided in the vehicle are performed.

For example, among various electronic devices, devices such as a black box or a rear surveillance camera are powered from the first battery to continuously photograph the surroundings even in a parked state after the vehicle is turned off.

The second battery 220 receives power from the first battery 210 and performs charging. The second battery 220 may be supplied with power from the alternator 150 to charge the battery.

The second battery 220 may include an active front steering (AFS), a motor driven power steering (MDPS), a rear wheel steering (RWS), and a vehicle anti- Active Roll Stabilization) and supplies power to each load (L2) connected thereto.

The first battery and the second battery may be connected in parallel to each other by the power conversion unit 250.

In addition, the power supply 200 may further include a power distribution unit (PDU). This power distribution unit (PDU) may be a switched power distribution unit (PDU) coupled with a switch SW.

The switch power distribution device can perform power quality and power control in addition to its main role in supplying power such as general PDU or multi-tap surge.

The first detection unit 230 is a battery sensor of the first battery 210 and the second detection unit 240 is a battery sensor of the second battery 220.

The battery sensor detects at least one of a voltage value, a current value and a temperature value of the battery.

The first detection unit 230 includes a first voltage detection unit that detects a voltage value of the first battery.

The first detection unit 230 may further include at least one of a first current detection unit for detecting a current value of the first battery and a first temperature detection unit for detecting a temperature value of the first battery.

The second detection unit 240 includes a second voltage detection unit that detects the voltage value of the second battery.

The second detector 240 may further include at least one of a second current detector for detecting a current value of the second battery and a second temperature detector for detecting a temperature value of the second battery.

The first and second detection units 230 and 240 can transmit an electric signal corresponding to the detected detection information to the control unit 180. [ At this time, the controller 180 can recognize the voltage value of the first battery and the voltage value of the second battery based on the received electric signals.

The power conversion unit 250 may include first and second filters F1 and F2 for removing noise on a circuit between the first battery and the second battery, a resistor R, and at least one conversion unit .

That is, the power conversion unit may include one conversion unit.

Also, the power conversion unit 250 may include a plurality of conversion units P1, P2, and P3 for improving the efficiency of step-up and step-down of voltage. Here, the internal circuit configurations of the plurality of conversion units P1, P2, and P3 are the same. Therefore, only one conversion unit P1 will be described.

5, the converting unit P1 includes a first switching unit T1, a second switching unit T2, a third switching unit T3, and a fourth switching unit T4, (L).

The first switching unit T1, the second switching unit T2, the third switching unit T3 and the fourth switching unit T4 include n-channel MOSFETs. Although a MOSFET is exemplified in this embodiment, all the switching elements other than the MOSFET can be used.

Diodes are connected to the MOSFETs of the first switching unit T1, the second switching unit T2, the third switching unit T3 and the fourth switching unit T4. These circuit connections will be described.

The first MOSFET, which is the first switching unit T1, has a connection structure in which the drain terminal is connected to the first filter F1 and the source terminal is connected to the first end of the inductor L.

The second MOSFET, which is the second switching unit T2, has a connection structure in which the drain terminal is connected to the source terminal of the first MOSFET and is connected to the first terminal of the inductor L, and the source terminal is grounded.

The third MOSFET, which is the third switching unit T3, has a connection structure in which the drain terminal is connected to the second filter F2 and the source terminal is connected to the second terminal of the inductor.

The fourth MOSFET, which is the fourth switching unit T4, has a connection structure in which the drain terminal is connected to the source terminal of the third MOSFET and is connected to the second terminal of the inductor L, and the source terminal is grounded.

The first switching unit T1 and the third switching unit T3 may be connected in series at both ends of the inductor.

The second switching unit T2 and the fourth switching unit T4 are connected to both ends of the inductor, and may be connected in parallel between the inductor and the ground.

The first diode D1 has a connection structure in which the cathode terminal is connected to the drain terminal of the first MOSFET and the anode terminal is connected to the source terminal of the first MOSFET.

The second diode D2 has a connection structure in which the cathode terminal is connected to the drain terminal of the second MOSFET and the anode terminal is connected to the source terminal of the second MOSFET.

The third diode D3 has a connection structure in which the cathode terminal is connected to the drain terminal of the third MOSFET and the anode terminal is connected to the source terminal of the third MOSFET.

The fourth diode D4 has a connection structure in which the cathode terminal is connected to the drain terminal of the fourth MOSFET and the anode terminal is connected to the source terminal of the fourth MOSFET.

FIG. 6 is a flow chart for explaining the boost mode of the power conversion unit provided in the vehicle according to the embodiment, and will be described with reference to FIGS. 7 and 8. FIG.

7 is a circuit control example of a bypass mode of a power conversion unit provided in a vehicle according to an embodiment, and FIG. 8 is an example of circuit control of a buck mode of a power conversion unit provided in a vehicle according to an embodiment.

An example of charging the first battery using the second battery will be described.

The vehicle predicts the power consumption of the first load and determines whether the first battery is charged based on the predicted power consumption of the first load.

The vehicle detects the first voltage value of the first battery 210 using the first detection unit 230 and detects the first voltage value of the second battery 220 using the second detection unit 240. [ Of the second voltage value.

The vehicle checks the first voltage value of the first battery 210 detected through the first detection unit 230 and the second voltage value of the second battery 220 detected through the second detection unit 240 (301), subtracting the second voltage value of the second battery (220) from the first voltage value of the identified first battery (210) to obtain a voltage difference value between the two batteries (302).

The vehicle determines whether the obtained voltage difference value is within the reference range (303), and performs the bypass mode when it is determined that the obtained voltage difference value is within the reference range (304). Thereby allowing the first battery to be charged.

Determining that the obtained voltage difference value is within the reference range includes determining whether the obtained voltage difference value is a value between the first set value and the second set value.

As shown in FIG. 7, the bypass mode is performed by turning on the first switching unit T1 and the third switching unit T3 of the converting unit and turning on the second switching unit T2 and the fourth switching unit T3, (T4).

The first switching unit T1 and the third switching unit T3 in the conversion unit of the power conversion unit are 100% conducted to minimize the conduction loss caused by the power conversion, thereby increasing the power conversion efficiency.

More specifically, if the voltage of the first battery with a high voltage is lowered by bypassing the conversion unit of the power conversion unit with a large voltage difference between the two batteries, the overall power stability of the vehicle may be impaired In addition, when the switching unit is turned on for a long period of time, the switch element (i.e., MOSFET) due to the voltage difference may be damaged. Lt; / RTI >

Therefore, the present embodiment is to bypass the converter of the power conversion unit in a state where the voltage difference between the two batteries is small, that is, within the reference range.

If it is determined that the obtained voltage difference value is out of the reference range, the vehicle determines whether the obtained voltage difference value is equal to or less than the first reference value (305).

Here, the first reference value is a value smaller than the first set value, and may be a negative value.

The first reference value is negative, which means that the voltage value of the first battery is smaller than the voltage value of the second battery.

If it is determined that the obtained voltage difference value exceeds the first reference value, the vehicle checks (306) the power consumption amount of the second load (L2) in the vehicle, and if the power consumption amount of the identified second load (L2) (307).

The determination that the obtained voltage difference value exceeds the first reference value means that the voltage value of the first battery is smaller than the voltage value of the second battery but not smaller than a predetermined value.

The checking of the power consumption of the second load L2 in the vehicle is performed by confirming the running speed corresponding to the detected information detected by the speed detecting section of the running information detecting section and detecting the rotation speed of the steering wheel based on the detected information detected by the steering angle detecting section Recognizes the braking force based on the detection information detected by the pressure detecting unit, recognizes the level of the vehicle shake based on the control information of the vehicle posture stability control apparatus, and determines the running speed, the rotational speed of the steering wheel, And checking the power consumption of the load of the vehicle corresponding to at least one of the shake levels.

It is also possible to determine that the load consumes more than the reference power consumption if the running speed is equal to or higher than the reference speed and it is also possible to determine that the load consumes more than the reference power consumption if the rotating speed of the steering wheel is higher than the reference rotation speed, It is also possible to determine that the load consumes more than the reference power consumption if the recognized braking force is equal to or greater than the reference braking force and that the load consumes more than the reference power consumption if the recognized vibration level is equal to or higher than the reference level.

It is also possible for the vehicle to determine that the load consumes more than the reference power consumption when at least two of the above conditions are satisfied and it is also possible to determine that the load consumes more than the reference power consumption when the three conditions are satisfied, It is also possible to determine that the load consumes more than the reference power consumption when the condition is satisfied.

When the vehicle determines that the power consumption of the load is less than the reference consumption amount, the bypass mode is performed (304). Here, the bypass mode is the same as the bypass mode described above, so that the description is omitted.

If it is determined that the power consumption of the load is greater than the reference consumption amount, the vehicle performs the buck mode (308).

Also, if it is determined that the obtained voltage difference value is equal to or less than the first reference value, the vehicle performs the buck mode (308).

8, performing the buck mode (i.e., the step-down mode) is performed by turning on the first switching unit T1 of the converting unit and turning on the third switching unit T3 by the pulse width modulation (PWM) control Turns off the second switching unit T2, and turns off the fourth switching unit T4.

When the third switching unit T3 is controlled by pulse width modulation (PWM), soft start is performed by gradually increasing the duty ratio.

That is, the duty ratio of the third switching unit T3 is increased by a predetermined duty cycle at regular time intervals.

The conversion unit of the power conversion unit converts the third switching unit T3 from the second battery 220 to the inductor L and the inductor L from the third switching unit T3 at the ON time of the third switching unit T3, So that current flows from the first switching unit T 1 and the first switching unit T 1 toward the first battery 210.

Here, the MOSFET of the n-channel of the first switching unit T1 has a source terminal of + voltage, Current flows from the source terminal to the drain terminal regardless of the signal of the gate. Therefore, the first switching unit T1 can be turned on or off.

In addition, when the first switching unit T1 is a switching device different from the MOSFET of the n-channel, current may flow from the inductor L1 to the first battery 210 through the first diode D1.

The conversion unit of the power conversion unit causes the current to flow from the inductor L and the inductor L to the first battery 210 in the fourth diode D4 in the off time of the third switching unit T3.

Here, the MOSFET of the n-channel of the first switching unit T1 flows a current from the source terminal to the drain terminal irrespective of the signal of the gate when the source terminal is the + voltage and the drain terminal voltage. Therefore, the first switching unit T1 can be turned on or off.

In addition, when the first switching unit T1 is a switching device different from the MOSFET of the n-channel, current may flow from the inductor L1 to the first battery 210 through the first diode D1.

At this time, since the inductor does not change the current flow between the ON time and the OFF time of the third switching unit, only the current corresponding to the pulse width modulation of the third switching unit can be transmitted to the first battery.

9 is a control flowchart of the boost mode of the power converting unit provided in the vehicle according to the embodiment. This will be described with reference to Figs. 7 and 10. Fig.

10 is a diagram illustrating an example of boost mode circuit control of a power conversion unit provided in a vehicle according to an embodiment of the present invention.

The vehicle detects the first voltage value of the first battery 210 using the first detection unit 230 while charging the first battery using the second battery 230 and detects the first voltage value of the second battery 210 using the second detection unit 240, (220).

The vehicle checks the first voltage value of the first battery 210 detected through the first detection unit 230 and the second voltage value of the second battery 220 detected through the second detection unit 240 (312), and subtracts the second voltage value of the second battery (220) from the first voltage value of the first battery (210) to obtain a voltage difference value between the two batteries (312).

The vehicle determines whether the obtained voltage difference value is within the reference range (313), and performs the bypass mode when it is determined that the obtained voltage difference value is within the reference range (314).

Determining that the obtained voltage difference value is within the reference range includes determining whether the obtained voltage difference value is a value between the first set value and the second set value.

As shown in FIG. 7, the bypass mode is performed by turning on the first switching unit T1 and the third switching unit T3 of the converting unit and turning on the second switching unit T2 and the fourth switching unit T3, (T4).

The first switching unit T1 and the third switching unit T3 in the conversion unit of the power conversion unit are 100% conducted, thereby minimizing the conduction loss caused by the power conversion, thereby increasing the power conversion efficiency. The explanation of the above is omitted.

The vehicle determines (315) whether the obtained voltage difference value is greater than or equal to a second reference value when it is determined that the obtained voltage difference value is out of the reference range.

Here, the second reference value is a value larger than the second set value and may be a positive value.

A positive second reference value means that the voltage value of the first battery is greater than the voltage value of the second battery.

If it is determined that the obtained voltage difference value is less than the second reference value, the vehicle checks the power consumption amount of the second load in the vehicle (316), and determines whether the power consumption amount of the identified second load is greater than the reference consumption amount (317).

The determination that the obtained voltage difference value is less than the second reference value means that the voltage value of the first battery is smaller than the voltage value of the second battery but not greater than a predetermined value.

The checking of the power consumption of the second load L2 in the vehicle is performed by confirming the running speed corresponding to the detected information detected by the speed detecting section of the running information detecting section and detecting the rotation speed of the steering wheel based on the detected information detected by the steering angle detecting section Recognizes the braking force based on the detection information detected by the pressure detecting unit, recognizes the level of the vehicle shake based on the control information of the vehicle posture stability control apparatus, and determines the running speed, the rotational speed of the steering wheel, And checking the power consumption of the load of the vehicle corresponding to at least one of the shake levels.

It is also possible to determine that the load consumes more than the reference power consumption if the running speed is equal to or higher than the reference speed and it is also possible to determine that the load consumes more than the reference power consumption if the rotating speed of the steering wheel is higher than the reference rotation speed, It is also possible to determine that the load consumes more than the reference power consumption if the recognized braking force is equal to or greater than the reference braking force and that the load consumes more than the reference power consumption if the recognized vibration level is equal to or higher than the reference level.

It is also possible for the vehicle to determine that the load consumes more than the reference power consumption when at least two of the above conditions are satisfied and it is also possible to determine that the load consumes more than the reference power consumption when the three conditions are satisfied, It is also possible to determine that the load consumes more than the reference power consumption when the condition is satisfied.

If the vehicle determines that the power consumption of the second load (L2) is less than the reference consumption amount, the vehicle performs the bypass mode (314). Here, the bypass mode is the same as the bypass mode described above, so that the description is omitted.

The vehicle performs the boost mode (318) if it determines that the power consumption of the second load (L2) is equal to or greater than the reference consumption amount.

Also, if it is determined that the obtained voltage difference value is equal to or greater than the second reference value, the vehicle performs the boost mode (318).

10, performing the boost mode (i.e., the boosting mode) for charging the first battery using the second battery may include turning off the first switching unit T1 of the conversion unit, Controls the pulse width modulation (PWM) of the switching part T2, turns on the third switching part T3, and turns off the fourth switching part T4.

The conversion unit of the power conversion unit converts the second switching unit T2 from the second battery 220 to the third switching unit T3, the third switching unit T3 to the inductor L, and the inductor L So that current flows from the second switching unit T2 and the second switching unit T2 toward the ground.

During the pulse width modulation (PWM) control of the second switching unit T2, the soft-start is performed by gradually increasing the duty ratio.

That is, the duty ratio of the second switching part T2 is increased by a constant duty at regular time intervals.

During the on time of the second switching unit T2, the current of the second battery flows through the inductor and stores energy in the inductor. The inductor stores energy in the form of a magnetic field.

The converting unit of the power converting unit causes the current to flow from the inductor L and the inductor L to the first diode D1 in the third switching unit T3 turned on in the off time of the second switching unit T2 .

That is, the power converting unit releases the energy stored in the inductor L at the time of off time of the second switching unit T2. At this time, the emitted energy is represented by an electromotive force having a polarity opposite to the direction of the current flowing through the on time of the second switching unit.

In other words, the electromotive force is generated in a direction to keep the current flowing during the on-time of the second switching unit. The voltage generated at this time is called a back electromotive force, and the voltage can be boosted by this back electromotive force. The boosted voltage is rectified by the first diode D1 and then applied to the first battery 210. [ Thus, the first battery can be charged using the second battery.

A constant voltage can be maintained in the first load by performing the buck mos and the boost mode of the power conversion unit, and the conduction loss of the switching unit of the switching unit can be prevented, thereby improving the energy conversion efficiency.

11 and 12, an example of charging the second battery using the first battery will be described.

The vehicle predicts the power consumption of the second load and determines whether the second battery is charged based on the predicted power consumption of the second load.

The vehicle detects the first voltage value of the first battery 210 using the first detection unit 230 and detects the second voltage value of the second battery 220 using the second detection unit 240. [ Of the second voltage value.

The vehicle checks the first voltage value of the first battery 210 detected through the first detection unit 230 and the second voltage value of the second battery 220 detected through the second detection unit 240 And subtracts the first voltage value of the first battery 210 from the second voltage value of the second battery 220 to obtain a voltage difference value between the two batteries.

The vehicle determines whether the obtained voltage difference value is within the reference range, and performs the bypass mode when it is determined that the obtained voltage difference value is within the reference range. Thereby charging the second battery.

Determining that the obtained voltage difference value is within the reference range includes determining whether the obtained voltage difference value is a value between the first set value and the second set value.

As shown in FIG. 7, the bypass mode is performed by turning on the first switching unit T1 and the third switching unit T3 of the converting unit and turning on the second switching unit T2 and the fourth switching unit T3, (T4).

That is, the vehicle bypasses the converting unit of the power converting unit in a state where the voltage difference between the two batteries is small, that is, within the reference range.

The vehicle determines whether the obtained voltage difference value is less than the first reference value when it is determined that the obtained voltage difference value is out of the reference range.

Here, the first reference value is a value smaller than the first set value, and may be a negative value.

If the first reference value is negative, it means that the voltage value of the second battery is smaller than the voltage value of the first battery.

The vehicle checks the power consumption of the second load (L2) in the vehicle if it is determined that the obtained voltage difference value exceeds the first reference value, and determines whether the power consumption of the identified second load (L2) is greater than or equal to the reference consumption amount.

The determination that the obtained voltage difference value exceeds the first reference value means that the voltage value of the second battery is smaller than the voltage value of the first battery but not smaller than a predetermined value.

The vehicle performs the bypass mode when it is determined that the power consumption of the second load is less than the reference consumption. Here, the bypass mode is the same as the bypass mode described above, so that the description is omitted.

The vehicle performs the buck mode when it is determined that the power consumption of the load is greater than the reference consumption.

Also, the vehicle performs the buck mode when it is determined that the obtained voltage difference value is less than the first reference value.

11, performing the buck mode (i.e., the step-down mode) for charging the second battery using the first battery is performed by performing the pulse width modulation (PWM) on the first switching unit T1 of the conversion unit, , Turning off the second switching unit T2, turning on the third switching unit T3, and turning off the fourth switching unit T4.

During the pulse width modulation (PWM) control of the first switching unit T1, soft-start is performed by gradually increasing the duty ratio.

That is, the duty ratio of the first switching unit T1 is increased by a predetermined duty cycle at regular time intervals.

The conversion unit of the power conversion unit includes a first switching unit T 1 in the first battery 210, an inductor L in the first switching unit T 1, an inductor L in the first battery 210, The third switching unit T3, and the third switching unit T3 to flow the current toward the second battery 220. [

When the third switching unit T3 is a switching device different from the MOSFET of the n-channel, current may flow from the inductor L1 to the second battery 220 through the third diode D3.

The conversion unit of the power conversion unit causes the current to flow from the inductor L to the second battery 220 in the second diode D2 and the inductor L in the off time of the first switching unit T1.

When the third switching unit T3 is a switching device different from the MOSFET of the n-channel, current may flow from the inductor L1 to the second battery 220 through the third diode D3.

At this time, since the inductor does not change the current flow between the ON time and the OFF time of the first switching unit, only the current corresponding to the pulse width modulation of the first switching unit can be transmitted to the second battery.

The vehicle detects the first voltage value of the first battery 210 by using the first detection unit 230 during charging the second battery and detects the second voltage value of the second battery 220 using the second detection unit 240. [ Value.

The vehicle checks the first voltage value of the first battery 210 detected through the first detection unit 230 and the second voltage value of the second battery 220 detected through the second detection unit 240 And subtracts the first voltage value of the first battery 210 from the second voltage value of the verified second battery 220 to obtain a voltage difference value between the two batteries.

The vehicle determines whether the obtained voltage difference value is within the reference range, and performs the bypass mode when it is determined that the obtained voltage difference value is within the reference range.

Determining that the obtained voltage difference value is within the reference range includes determining whether the obtained voltage difference value is a value between the first set value and the second set value.

As shown in FIG. 7, the bypass mode is performed by turning on the first switching unit T1 and the third switching unit T3 of the converting unit and turning on the second switching unit T2 and the fourth switching unit T3, (T4).

The first switching unit T1 and the third switching unit T3 in the conversion unit of the power conversion unit are 100% conducted to minimize the conduction loss caused by the power conversion, thereby increasing the power conversion efficiency.

The vehicle determines whether the obtained voltage difference value is greater than or equal to the second reference value when it is determined that the obtained voltage difference value is out of the reference range.

Here, the second reference value is a value smaller than the second set value, and may be a positive value.

A positive second reference value means that the voltage value of the first battery is greater than the voltage value of the second battery.

The vehicle checks the power consumption of the second load in the vehicle when the obtained voltage difference value is less than the second reference value, and determines whether the power consumption of the second load is greater than or equal to the reference consumption amount.

The vehicle performs the boost mode when it is determined that the power consumption of the second load is equal to or greater than the reference consumption amount.

The vehicle performs the boost mode when it is determined that the obtained voltage difference value is equal to or greater than the second reference value.

12, performing the boost mode (i.e., the boosting mode) for charging the second battery using the first battery may include turning on the first switching unit T1 of the conversion unit, Turning off the switching part T2, turning off the third switching part T3, and controlling the pulse width modulation (PWM) of the fourth switching part T4.

During the pulse width modulation (PWM) control of the fourth switching unit T4, soft start is performed by gradually increasing the duty ratio.

That is, the duty ratio of the fourth switching unit T4 is increased by a predetermined duty cycle at regular time intervals.

The conversion unit of the power conversion unit converts the first switching unit Tl in the first battery 210, the inductor L in the first switching unit Tl, and the inductor L in the first battery 210 during the on-time of the fourth switching unit T4. The fourth switching unit T4, and the fourth switching unit T4 so that current flows toward the ground.

The conversion unit of the power conversion unit converts the first switching unit T1 in the first battery 210, the inductor L in the first switching unit T1, and the inductor L in the inductor L during the off time of the fourth switching unit T4. 3 Let the current flow toward the diode D3.

During the on-time of the fourth switching unit T4, the current of the first battery flows through the inductor and stores energy in the inductor. The inductor stores energy in the form of a magnetic field.

That is, the power conversion unit releases the energy stored in the inductor L at the time of the off-time of the fourth switching unit T4. At this time, the emitted energy appears as an electromotive force having a polarity opposite to that of the current flowing through the fourth switching unit on-time.

In other words, the electromotive force is generated in a direction that keeps the current flowing during the on-time of the fourth switching unit. The voltage generated at this time is called a back electromotive force, and the voltage can be boosted by this back electromotive force. The boosted voltage is rectified by the third diode D3 and then applied to the second battery 220. [ Thus, the first battery can be charged with the charging voltage of the second battery.

The present embodiment can prevent the voltage drop of the first battery and the second battery when the power consumption of the second load is large, thereby securing the power stability of the first load.

100: vehicle 200: power supply
210: first battery 220: second battery
230: first detection unit 240: second detection unit
250: power conversion section

Claims (23)

A first detection unit for detecting a voltage of the first battery;
A second detection unit for detecting a voltage of the second battery;
A power conversion unit that steps down, maintains or maintains a voltage of a current of either the first battery or the second battery; And
When the voltage difference value between the voltage value detected by the first detecting unit and the voltage value detected by the second detecting unit is within the reference range, the voltage of the current between the first battery and the second battery is maintained, And a control unit for controlling the unit in the bypass mode. The apparatus of claim 1,
Wherein the control unit checks a power consumption amount of a load connected to the second battery when the voltage difference value between the two batteries is within a reference range and if the determined power consumption amount is less than the reference power consumption amount, And controlling the power conversion unit to the bypass mode so that the voltage is maintained. 3. The apparatus of claim 2,
When the voltage difference value of the two batteries is out of the reference range and the voltage value of any one of the batteries for charging the first battery and the second battery is lower than the voltage value of the other battery, And controlling the power supply. The apparatus of claim 1,
If the voltage difference value between the two batteries is out of the reference range and the voltage value of any one of the batteries for charging the first battery and the second battery is higher than the voltage value of the other battery, Wherein the power supply comprises a power supply. The power conversion apparatus according to claim 1,
A first switching unit connected to the first battery, an inductor connected to the first switching unit, a second switching unit connected between a contact between the first switching unit and the inductor and a ground, and a second switching unit connected between the inductor and the second A fourth switching unit connected between the third switch and the inductor, and a fourth switching unit connected between the ground and the contact between the third switching unit and the inductor. 6. The apparatus of claim 5,
And turning on the first switching unit and the third switching unit in the bypass mode, and turning off the second switching unit and the fourth switching unit. 6. The apparatus of claim 5,
Controlling the pulse width modulation of the third switching unit in the buck mode for charging the first battery and controlling the pulse width modulation of the second switching unit in the boost mode. 6. The apparatus of claim 5,
Controlling the pulse width modulation of the first switching unit in the buck mode for charging the second battery and controlling the pulse width modulation of the fourth switching unit in the boost mode. A first battery for supplying electric power to the first load;
A second battery for supplying power to the second load;
A traveling information detecting unit for detecting traveling information;
A power conversion unit that steps down, maintains or maintains a voltage of a current of either the first battery or the second battery; And
Wherein the control unit acquires a power consumption amount of the second load based on the travel information, and when the obtained power consumption is less than a reference power consumption amount, the power conversion unit And a control unit for controlling the vehicle in a bypass mode. 10. The method of claim 9,
A first detection unit for detecting a voltage of the first battery;
Further comprising a second detection unit for detecting a voltage of the second battery,
Wherein the control unit sets the power conversion unit to the power conversion mode when the obtained power consumption is less than the reference power consumption and the voltage difference value between the voltage value detected by the first detection unit and the voltage value detected by the second detection unit is within the reference range. Pass mode. 11. The apparatus according to claim 10,
When the voltage difference value of the two batteries is out of the reference range and the voltage value of any one of the batteries for charging the first battery and the second battery is lower than the voltage value of the other battery, And controlling the vehicle. 11. The apparatus according to claim 10,
If the voltage difference value between the two batteries is out of the reference range and the voltage value of any one of the batteries for charging the first battery and the second battery is higher than the voltage value of the other battery, ≪ / RTI > 10. The power conversion apparatus according to claim 9,
A first switching unit connected to the first battery, an inductor connected to the first switching unit, a second switching unit connected between a contact between the first switching unit and the inductor and a ground, and a second switching unit connected between the inductor and the second A fourth switching unit connected between the third switch and the inductor, and a fourth switching unit connected between the ground and the contact between the third switching unit and the inductor. 14. The power conversion apparatus according to claim 13,
And turning on the first switching unit and the third switching unit in the bypass mode, and turning off the second switching unit and the fourth switching unit. 14. The apparatus of claim 13,
Controlling the pulse width modulation of the third switching unit in the buck mode for charging the first battery and controlling the pulse width modulation of the second switching unit in the boost mode. 16. The apparatus of claim 15,
And controlling the duty to be increased by a predetermined duty cycle at a predetermined time interval when the pulse width modulation control of any one of the third switching unit and the second switching unit is performed. 14. The apparatus of claim 13,
Controlling the pulse width modulation of the first switching unit in the buck mode for charging the second battery and controlling the pulse width modulation of the fourth switching unit in the boost mode. 18. The apparatus of claim 17,
And controlling the duty to be increased by a predetermined duty cycle at a predetermined time interval in the pulse width modulation control of either the first switching unit or the fourth switching unit. 10. The navigation system according to claim 9,
A steering angle detecting section for detecting a steering angle of the steering wheel; and a pressure detecting section for detecting a pressure applied to the brake pedal. 1. A control method for a vehicle including a power conversion section for converting power between a first battery and a second battery,
Detecting travel information of the vehicle,
Detecting voltages of the first and second batteries, respectively,
If the voltage difference value between the voltage value detected by the first detecting unit and the voltage value detected by the second detecting unit is within the reference range, the power consumption of the load connected to the second battery is acquired based on the detected running information ,
And controls the power conversion unit to be in a bypass mode so that the voltage of the current between the first battery and the second battery is maintained when the obtained power consumption is less than the reference power consumption. 21. The method of claim 20,
When the voltage difference value of the two batteries is out of the reference range and the voltage value of any one of the batteries for charging the first battery and the second battery is lower than the voltage value of the other battery, Control,
And controlling the power converter to the boost mode if the voltage value of any one of the batteries for charging the first battery and the second battery is higher than the voltage value of the other battery. 21. The method of claim 20,
Controlling the power conversion unit to the bypass mode includes controlling the turn-on of the switching unit connected in series to both ends of the inductor,
Controlling the power conversion unit in a buck mode includes performing pulse width modulation control of a switching unit serially connected to the inductor,
And controlling the power conversion unit to the boost mode includes performing pulse width modulation control of a switching unit connected between the inductor and the ground. 21. The method of claim 20, wherein obtaining power consumption of a load connected to the second battery comprises:
Checking whether the running speed of the vehicle is equal to or higher than a reference speed,
The control unit determines whether the rotational speed of the steering wheel of the vehicle is equal to or greater than a reference speed,
The controller determines whether the braking force of the vehicle is equal to or greater than a reference braking force,
And confirming whether the shake level of the vehicle is equal to or higher than a reference level.

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