KR102443406B1 - Vehicle and control method for the same - Google Patents

Abstract

It minimizes the error from the actual charging time by calculating the expected charging time for each vehicle by reflecting the learning value of the electric load consumption during charging that may occur for each vehicle, and providing the calculated estimated charging time to the user to terminate the user It provides vehicles and vehicle control methods that allow point recognition and efficient use of time.
A vehicle according to an embodiment includes a battery capable of slow charging or fast charging; an internal charger for slowly charging the battery; a battery control unit configured to calculate an expected charging time required by using the average charging current of the internal charger and the learned electric load consumption current when the battery is slowly charged; and a display unit displaying the calculated estimated charging time required.

Description

Vehicle and its control method

The disclosed invention relates to a vehicle for calculating the time required to charge a battery and a method for controlling the same.

Recently, research and development of eco-friendly vehicles have been actively conducted due to the depletion of petroleum resources and the problem of global warming caused by greenhouse gases.

An eco-friendly vehicle is a vehicle that emits less air pollutants or carbon dioxide and has excellent fuel efficiency compared to conventional internal combustion engine vehicles. However, a plug-in hybrid electric vehicle that receives the electric energy required for the motor from an external power source, and an electric vehicle that does not use fossil fuels by supplying electric energy from a high-voltage battery provided in the vehicle to the electric motor , and a fuel cell electric vehicle using a fuel cell that generates electricity by reacting hydrogen with oxygen in the air.

Plug-in hybrid vehicles and electric vehicles that receive electrical energy from an external power source require battery charging for driving, and it takes approximately 20 minutes or more (for fast charging) or 5 hours or more (for slow charging). to be.

Therefore, in order to improve user convenience, it is necessary to accurately inform the user of the time required to charge the battery.

It minimizes the error from the actual charging time by calculating the expected charging time for each vehicle by reflecting the learning value of the electric load consumption during charging that may occur for each vehicle, and providing the calculated estimated charging time to the user to terminate the user It provides vehicles and vehicle control methods that allow point recognition and efficient use of time.

A vehicle according to an embodiment includes a battery capable of slow charging or fast charging; an internal charger for slowly charging the battery; a battery control unit configured to calculate an expected charging time required by using the average charging current of the internal charger and the learned electric load consumption current when the battery is slowly charged; and a display unit displaying the calculated estimated charging time required.

When the slow charging of the battery is completed, the battery controller may calculate an actual electric load consumption current and re-learn the learned electric load consumption current using the calculated actual electric load consumption current.

The vehicle may further include a storage unit configured to store the learned electric load consumption current.

When the slow charging of the battery is completed, the battery controller obtains a first current value that is an average value of the charging current of the slow charger measured during charging of the battery when the slow charging of the battery is completed, A second current value may be obtained by dividing the target amount of charge by the actual time required for slow charging, and the actual electric field load consumption current may be calculated from a deviation between the first current value and the second current value.

The battery controller may re-learn the learned electric load consumption current by averaging the learned electric load consumption current and the actual electric load consumption current.

The battery control unit may calculate an expected charging time required for the next slow charging of the battery using the re-learned electric load consumption current.

The battery controller may obtain the average charging current from a table in which an initial voltage of the battery and an average charging current according to a charging output of the internal charger are mapped.

The battery controller may calculate the estimated charging time required by dividing the target charging amount of the battery by a deviation between the average charging current and the learned electric load consumption current.

The battery control unit may periodically calculate the expected charging time required during the slow charging of the battery and update the expected charging time displayed on the display unit.

The display unit may include at least one of a cluster display and a head unit display.

A vehicle control method according to an embodiment includes: when a battery is slowly charged, an average charging current of an internal charger used for slow charging the battery is acquired; calculating an expected charging time using the average charging current and the learned electric load consumption current; and displaying the calculated estimated charging time required.

When the slow charging of the battery is completed, the control method of the vehicle calculates an actual electric load consumption current; The method may further include; re-learning the learned electric load consumption current using the calculated actual electric load consumption current.

The method of controlling the vehicle may further include storing the learned electric load consumption current.

Calculating the actual electric load consumption current is to obtain a first current value that is an average value of the charging current of the slow charger measured during the charging of the battery when the slow charging of the battery is completed, and to the slow charging of the battery and obtaining a second current value by dividing the target charge amount by the actual time spent, and calculating the actual electric load consumption current from a deviation between the first current value and the second current value.

Re-learning the learned electric load consumption current may include averaging the learned electric load consumption current and the actual electric load consumption current.

The method of controlling the vehicle may further include calculating an expected charging time required by using the re-learned electric load consumption current during the next slow charging of the battery.

The acquiring of the average charging current may include acquiring the average charging current from a table in which an initial voltage of the battery and an average charging current according to a charging output of the internal charger are mapped.

The method may further include: periodically calculating the expected charging time required during the slow charging of the battery and updating the expected charging time displayed on the display unit.

A vehicle and a control method thereof according to one aspect minimize an error with an actual charging time required by calculating an expected charging time for each vehicle by reflecting a learning value for an electric load consumption during charging that may occur for each vehicle, and By providing the user with the time required for charging, convenience can be improved so that the user can recognize the charging end point and use the time efficiently.

1 is a control block diagram of a vehicle according to an exemplary embodiment.
2 is a view illustrating an exterior of a vehicle according to an exemplary embodiment.
3 is a diagram specifically illustrating configurations related to a battery in a vehicle according to an exemplary embodiment.
4 is a graph illustrating changes in voltage and current according to time during slow charging in a vehicle according to an exemplary embodiment.
5 is a table in which an average current is mapped according to an initial voltage and a charging output in a vehicle according to an exemplary embodiment.
6 is a view illustrating the interior of a vehicle according to an exemplary embodiment.
7 and 8 are diagrams illustrating examples in which a vehicle displays an expected charging time required for a battery according to an exemplary embodiment.
9 is a flowchart illustrating a method for controlling a vehicle according to an exemplary embodiment.

Like reference numerals refer to like elements throughout. This specification does not describe all elements of the embodiments, and general content in the technical field to which the present invention pertains or content that overlaps between the embodiments is omitted. The term 'part, module, member, block' used in the specification may be implemented in software or hardware, and according to embodiments, a plurality of 'part, module, member, block' may be implemented as a single component, It is also possible for one 'part, module, member, block' to include a plurality of components.

Throughout the specification, when a part is "connected" with another part, this includes not only direct connection but also indirect connection, and indirect connection includes connection through a wireless communication network. do.

Also, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

The signs attached to each step are used to identify each step, and these signs do not indicate the order between the steps, and each step is performed differently from the stated order unless the context clearly indicates a specific order. can be

Hereinafter, embodiments of a vehicle and a vehicle control method will be described in detail with reference to the accompanying drawings.

A vehicle according to an embodiment is a vehicle that generates driving force by supplying electric energy from a battery to a motor, and receives electric energy stored in the battery from an external power source, and includes a plug-in hybrid vehicle using both an engine and a motor as a power generating source; It can include all electric vehicles that use only a motor. However, in the embodiments to be described later, an electric vehicle will be described as an example for convenience of description.

1 is a control block diagram of a vehicle according to an exemplary embodiment.

Referring to FIG. 1 , a vehicle 100 according to an embodiment includes a motor 130 , a battery 110 capable of slow charging or fast charging, an internal charger 140 used for slow charging the battery 110 , and a battery ( 110), the battery control unit 120 for calculating the expected charging time using the average charging current and the learned electric load consumption current and the display unit 150 for displaying the calculated expected charging time include

In addition, the vehicle 100 may further include a storage unit 160 that stores the learned electric load consumption current.

Hereinafter, operations such as charging of the battery 110 and calculation of the estimated charging time required together with the structure of the vehicle including the motor 130 and the battery 110 will be described in detail.

FIG. 2 is a view showing an exterior of a vehicle according to an embodiment, and FIG. 3 is a view showing in detail configurations related to a battery in the vehicle according to an embodiment.

Referring to FIG. 2 , the vehicle 100 provides a vehicle body 10 forming the exterior of the vehicle 100 , wheels 21 and 22 for moving the vehicle 100 , and a driver with a view of the front of the vehicle 1 . and a side mirror 35 that provides a view of the rear side of the vehicle 100 to the driver.

In addition, the motor 130 provided inside the vehicle 100 converts electric energy supplied from the battery 110 into torque to generate a driving force, and provides the generated driving force to the front wheels 21 or the rear wheels 22 . .

When the vehicle 100 is a front wheel drive type, the motor 130 provides rotational force to the front wheels 21 , and provides a rotational force to the rear wheels 22 when the vehicle 100 is a rear wheel drive type. Also, when the vehicle 100 is a four-wheel drive type, rotational force may be provided to both the front wheels 21 and the rear wheels 22 .

In order to charge the battery 110 , the vehicle body 100 may be provided with charging ports 41 and 42 used to receive power from an external power source. In the example of FIG. 2 , for convenience of explanation, both the charging ports 41 and 42 are shown in the same direction, but depending on the positions of the battery 110 and the motor 130 in the vehicle 100, the charging port ( 41 and 42) are provided on opposite sides of each other, or at least one of the two may be provided on the front or rear of the vehicle. In the embodiment of the vehicle 10 , there is no limitation on the positions of the charging ports 41 and 42 .

There are two methods of charging an electric vehicle's battery: slow charging and fast charging. Slow charging is a method of charging at a low speed through a current applied from a general power source, and fast charging is a method of charging in a short time by applying a high current.

For example, the slow charger 200 may supply 220V AC power, and in this case, the time it takes to fully charge the battery 110 may be about 4-5 hours. The quick charger 300 may supply a DC power of about 100-500V, and in this case, it may take about 25 minutes to fully charge the battery 110 . However, when the fast charger 300 is used, the battery 110 may not be charged 100% but only 80% may be charged.

The charging port may include a slow charging port 41 used to receive power from the external slow charger 200 and a fast charging port 42 used to receive power from the external fast charger 300 .

Connect one end of the charging cable (C1) to the slow charger 200, and connect the other end of the charging cable (C1) to the slow charging port 41 of the vehicle 100, which is supplied from the slow charger 200 Power may be transmitted to the vehicle 100 .

In addition, by connecting the charging cable C2 of the rapid charger 300 to the rapid charging port 42 of the vehicle 100 , power supplied from the rapid charger 300 may be transmitted to the vehicle 100 .

In the case of rapid charging, the rapid charger 300 and the battery control unit 120 may communicate to exchange information necessary for charging.

Referring to FIG. 3 , a process of charging the battery 110 will be described in more detail.

The battery 110 of the vehicle 100 according to an embodiment includes a secondary battery capable of repeating charging and discharging, for example, a lithium ion battery may be employed.

Lithium-ion batteries are charged and discharged through a process in which lithium ions are doped/undoped while moving between the anode and the cathode.

During charging, lithium is undoped from the positive electrode composed of a compound containing lithium, and lithium is doped between the carbon layers of the negative electrode. During discharge, lithium is undoped from the carbon layer of the negative electrode and lithium is doped between the layers of the positive electrode compound.

Referring to FIG. 3 , in the battery 110 , a plurality of cells are combined by one frame to form a battery module 111 , and a plurality of battery modules 111 to constitute one battery 110 . can The battery 110 including the plurality of battery modules 111 may be referred to as a battery pack.

In addition, a cell monitor unit 112 that measures the voltage of a unit cell and starts discharging as necessary may be provided for each battery module 111 .

On the other hand, DC power must be supplied to the battery 110 . Accordingly, AC power supplied from the slow charger 200 is converted into DC power in the internal charger 140 provided in the vehicle 100 and supplied to the battery 110 . The internal charger 140 provided in the vehicle 100 is called an On Board Charger.

For example, the internal charger 140 may include a Power Factor Correction (PFC) boost converter circuit, a full bridge converter circuit, and a full bridge rectifier circuit. When 200V AC is supplied from the slow charger 200, the PFC boost converter circuit rectifies 200V AC, and the rectified voltage is boosted through the boost converter circuit. The full-bridge converter circuit converts the boosted voltage into a high-frequency AC voltage, and the high-frequency AC voltage is transformed into a high voltage through a transformer. The high-voltage AC voltage is rectified through the full-bridge rectification circuit, and the rectified waveform is converted into a DC voltage through the LC filter circuit and charged in the battery 110 .

Since the power supplied from the quick charger 300 is DC power, it may be directly supplied to the battery 110 without going through the internal charger 140 .

Electrical energy charged in the battery 110 is supplied to the motor 130 . Most of the components used in the vehicle 100 operate at a low voltage (eg, 12V). Accordingly, the electric energy charged in the battery 110 may be converted to a low voltage through a low voltage DC-DC converter (LDC) 171 before being supplied to the motor 130 .

The motor 130 may be a DC motor, an AC motor, a BLDC motor, etc. depending on the power used and the presence or absence of a brush. In this example, a case in which an AC motor is used will be described as an example.

The inverter 172 may control the torque of the motor 130 by converting the DC power converted into the low voltage into the AC power and adjusting the voltage and frequency of the AC power.

Also, the motor 130 may be connected to the speed reducer 181 . The reducer 181 may increase the torque by reducing the speed of the motor. When the reducer 181 is used, it is possible to generate a large force even with a small motor, so that it is possible to obtain the effects of cost reduction, space saving, weight reduction, and heat generation reduction.

The motor 130 converts electric energy supplied from the battery 110 into torque to generate a driving force. The generated driving force may be transmitted to the front wheels 21 or the rear wheels 22 to accelerate the vehicle 100 .

In addition, when decelerating or braking the vehicle 100 , the motor 130 becomes a generator, and it is also possible to store the generated electrical energy in the battery 110 . This is called regenerative braking.

When torque is generated by supplying current to the motor 130 , the vehicle 100 can be accelerated, and when the current supplied to the motor 130 is cut off, the motor 130 enters a closed circuit state. As the rotor connected to the wheels 21 and 22 continues to rotate due to the inertial force of the vehicle 100 , the motor 130 in a closed circuit state may generate electrical energy.

Since the electric energy generated by the motor 130 corresponds to AC power, it may be converted into DC power through the inverter 172 and stored in the battery 110 .

The battery controller 120 may measure and manage the voltage, current, temperature, etc. of the battery 110 to maintain it in an optimal state, and may calculate a State of Charge (SOC). In addition, to predict the life (SOH: State of Health) of the battery 110, and suppress overcharging and overdischarging of the battery 110 to perform cell balancing that maintains the cells in an even state of charge. can In addition, thermal management of the heat-sensitive battery 110 may be performed.

The battery control unit 120 may be referred to as a battery management system (BMS), and may include a memory in which a program necessary for performing the above-described operation and an operation to be described later is stored and a processor executing the stored program.

Meanwhile, various electronic devices inside the vehicle 100 may send and receive signals to each other through an internal communication protocol. In this case, at least one of a communication protocol such as a controller area network (CAN), a local interconnection network (LIN), a FlexRay, and an Ethernet may be used. In addition, CAN communication, LIN communication, and Ethernet may be appropriately mixed and used according to the type of signal transmitted and received or the types of units for transmitting and receiving signals.

When using CAN communication as in the example of FIG. 3 , the battery control unit 120 , the charger 140 , the inverter 172 , the battery 110 , etc. transmit a CAN signal to the CAN bus (BUS) or request a necessary CAN signal. can The CAN signal may be transmitted in the form of a message.

In addition, the ECU 182, which performs overall control of the vehicle 100, transmits the user's acceleration command or deceleration command input through the accelerator 184 and the brake 185 to the battery control unit 120 through the CAN bus. Then, the battery control unit 120 controls the charging/discharging of the battery 110 to supply electric energy to the motor 130 as described above to accelerate the vehicle 100 , or to supply electricity to the motor 130 . By blocking the energy, the vehicle 100 may be decelerated.

As described above, the battery controller 120 may calculate an estimated time required for charging the battery 110 . The time required for charging the battery 110 may vary depending on a charging method, a charging amount, a specification of a charging power source, an amount of electrical load consumed during charging, and the like.

Therefore, the battery control unit 120 determines the charging method of the battery 110, collects data necessary for calculating the charging time according to the determined charging method, and calculates the expected charging time using the collected data. can Hereinafter, an embodiment of calculating the expected charging time of the battery will be described in detail.

4 is a graph illustrating changes in voltage and current with time during slow charging in a vehicle according to an embodiment, and FIG. 5 is a table in which an average current is mapped according to an initial voltage and charging output in a vehicle according to an embodiment to be.

First, the battery controller 120 measures the state of charge (SOC) of the battery 110 and calculates a target charge amount based on the measured state of charge.

When charging the battery 110 in the slow charging method, the battery control unit 120 receives the current and voltage data from the internal charger 140, and calculates the charging output (W) based on the received current and voltage data. have.

As shown in FIG. 4 , as the battery 110 is being charged, the battery voltage increases and the charging current tends to decrease. Therefore, the average charging current can be calculated from the correlation between the charging output and the battery voltage during charging, and the average charging current table can be created by mapping the average charging current for each initial battery voltage and charging output, as shown in FIG. 5 . have. The generated average charging current table may be stored in the storage unit 160 .

The battery control unit 120 searches for the average charging current mapped to the initial voltage of the battery 110 and the charging output of the internal charger 140 from the average charging current table stored in the storage unit 160 , and uses the found average charging current Thus, the estimated charging time can be calculated. Accordingly, it is possible to reflect the characteristics of the battery exhibiting non-linearity during charging.

Specifically, the battery control unit 120 may calculate the expected charging time t based on Equation 1 below.

[Equation 1]

Here, C is a target charge amount, which may be expressed as a function f _Batt (SOC) of the battery state of charge (SOC), and the unit may be [Ah].

I _avg may represent an average charging current (unit is [A]) calculated from a table stored in the storage unit 160 using the charging output of the slow charger and the initial voltage of the battery measured at the initial charging stage.

I _E represents the vehicle's electric load consumption current during charging. As an example, I _E may represent a consumption current of the LDC 171 for the operation of the electric load of the vehicle 100 during charging.

The electric load consumption current can be updated through learning. For example, calculating the average value (first current value) of the charging current I _OBC of the slow charger measured during charging, and dividing the target charge amount C by the measured actual charging time required, the actual average charging current (second current value) By calculating , it is possible to calculate the consumption current of the actual electric load generated during charging from the deviation of the first current value and the second current value.

The actual electric load consumption current is stored in the storage unit 160 and used to calculate the next expected charging time. If the previously calculated actual electric load consumption current is stored, the stored electric load consumption current values are learned, and the learned electric load consumption current value can be used as the electric load consumption current _IE of [Equation 1] above. .

In this case, all of the stored electric load consumption current may be used, only the electric load consumption current obtained for a certain period may be used, and only the electric load consumption current obtained immediately before and the electric load consumption current obtained currently may be used.

The learning time of the electric load consumption current may be a time when slow charging is completed and the actual electric load consumption current is calculated, or may be a time when an expected charging time required for the next slow charging is calculated.

The learning of the electric load consumption current value may be accomplished by averaging or through machine learning reflecting factors other than the consumption current value.

For example, if the actual electric load consumption current calculated while the current charging is completed is I _ERn , and the electric load consumption current learned and stored while the previous charging is completed is I _{ELn -1} , the battery control unit 120 is [ According to Equation 2], the electric load consumption current I _ELn learned again by averaging the electric load consumption current may be obtained and stored in the storage unit 160 .

[Equation 2]

I _ELn = (I _ERn + I _{ELn -1} )/2

Accordingly, the battery controller 120 calculates the actual average charging current by dividing the target charge amount C by the actual charging time required whenever charging is completed, and calculates the charging current I _OBC measured during charging or between the average value and the actual average charging current. It is possible to calculate the actual electric load consumption current from the deviation, store and learn it, and use it in the calculation of the next expected charging time. Accordingly, it is possible to accurately calculate the estimated charging time required by reflecting the difference in consumption according to the individual performance of the vehicle.

On the other hand, when charging the battery 110 through rapid charging, the battery control unit 120 measures the temperature and state of charge (SOC) of the battery 110, and the estimated charging time required based on the temperature and state of charge of the battery can be obtained.

For example, the storage unit 160 may store the expected charging time according to the temperature and the state of charge (SOC) of the battery 110 in the form of a table, and the battery control unit 120 may perform rapid charging based on the stored table. You can obtain the estimated charging time of .

When the battery control unit 120 calculates the expected charging time required, it detects that the charging cable C1 or C2 is connected to the charging port 41 or 42 to determine whether the charging method is slow charging or fast charging, and the determined charging Depending on the method, the estimated charging time can be calculated.

6 is a diagram illustrating the interior of a vehicle according to an embodiment, and FIGS. 7 and 8 are diagrams illustrating an example in which a vehicle according to an embodiment displays an expected charging time required for a battery.

Referring to FIG. 6 , the head unit 60 may be provided in the center fascia that is the central area of the dashboard 51 inside the vehicle 100 . The head unit 60 may process and output an audio signal and a video signal, and a navigation module may be mounted to perform a navigation function. Accordingly, the head unit 60 is also referred to as an AVN (Audio Video Navigation) device.

In addition to an audio function, a video function, a navigation function, or a phone making function, the head unit 60 may also perform a function of displaying the state of the vehicle 100 or receiving a user's control command related thereto.

The head unit 60 may be provided with a display 61 for displaying a screen necessary to perform various functions and an input unit 62 for receiving a user's control command.

The display 61 may be implemented as one of various display devices such as a liquid crystal display (LCD), a light emitting diode (LED), a plasma display panel (PDP), an organic light emitting diode (OLED), and a cathode ray tube (CRT). have.

The input unit 62 may be provided in the form of a button or a touch pad around the display unit 61 or may be provided in the form of a touch pad on the front surface of the display unit 61 to constitute a touch screen.

A cluster 70 for displaying driving information and state information of the vehicle may be provided in front of the steering wheel 53 . The cluster display 71 may also be implemented as one of various display devices such as a liquid crystal display (LCD), a light emitting diode (LED), a plasma display panel (PDP), an organic light emitting diode (OLED), and a cathode ray tube (CRT). can

The user may change the information displayed on the cluster display 71 by manipulating the input unit 53a provided on the steering wheel 53 .

As shown in FIG. 7 , in the cluster display 71 , an area 71a for displaying the state of charge of the battery, an area 71b for displaying the speed of the vehicle, power (PWR), eco (ECO), and charge (CHARGE) are provided. ), an area 71c for displaying the state of the vehicle according to driving conditions, an area 71d for displaying a vehicle-related warning light, and an area 71e for displaying fuel-efficiency-related information may be provided.

In addition, the estimated charging time of the battery calculated by the battery controller 120 may be displayed on one area of the cluster display 71 . The estimated charging time may be displayed in the area 71e in which fuel efficiency related information is displayed or in the area 71a in which the charging state of the battery is displayed. There is no restriction on the location of the area where the estimated charging time of the battery is displayed.

The display unit 150 described above with reference to FIG. 1 may include the head unit display 61 and the cluster display 71 , and of course, other displays provided in the vehicle 100 may also be included.

As a method of displaying the estimated charging time required, a method of displaying the calculated time as shown in the example of FIG. 7 , a method of displaying an expected time for charging to be completed, or a method of displaying them simultaneously may be used. .

When the calculated estimated charging time required is displayed, the charging time decreasing as charging progresses may be reflected. Accordingly, when charging is started, as shown in the example of FIG. 7 , “expected charging time required” may be displayed, and after charging is started, “expected remaining charging time” may be displayed.

As a method of displaying the expected remaining charging time, a method of subtracting the elapsed time from the initial estimated required charging time may be used. In addition, it is also possible for the battery control unit 120 to calculate the estimated charging time required while the battery 110 is being charged, and to display it as the estimated remaining charging time.

For example, while the battery 110 is being charged, the expected charging time may be periodically calculated and the time displayed on the cluster display 71 may be updated.

After the calculation of the initial expected charging time, the charging time may vary due to an abnormal SOC behavior that may occur during charging or an abnormality in the charging current. In this case, it is possible to stably display the remaining time during charging by limiting the time change rate in displaying the expected remaining charging time. For example, if the expected charging time is calculated using a specific current value, but the current increases or decreases during charging, if the estimated remaining charging time is reflected and displayed, the actual time required and the time shown are displayed at the user's point of view. Each one is different and can be confusing. Accordingly, during charging, the time change rate may be limited so that the remaining time monotonically decreases in conjunction with the increase of the SOC.

As shown in FIG. 8 , it is also possible to display the expected charging time on the head unit display 61 . When charging is started, the expected charging time may be automatically displayed on the head unit display 61 , and the expected charging time may be displayed when the user selects to view battery information.

Even when displaying the expected charging time on the head unit 60, a method of displaying the calculated time, a method of displaying an expected time for charging to be completed, or a method of displaying them simultaneously may be used.

When slow charging is selected and started, the battery control unit 120 calculates the expected charging time required and transmits it to the head unit 60, and the head unit display 61 may display the expected charging time according to the slow charging. .

Meanwhile, it is also possible to audibly provide information about the expected charging time to the user. In this case, the expected charging time may be output by voice through a speaker provided in the vehicle 100 .

Hereinafter, an embodiment of a method for controlling a vehicle will be described. The vehicle 100 according to the above-described embodiment may be used as a method for controlling a vehicle according to an embodiment. Accordingly, even if not specifically mentioned, the descriptions of FIGS. 1 to 8 may also be applied to the method of controlling a vehicle according to an exemplary embodiment.

9 is a flowchart illustrating a method for controlling a vehicle according to an exemplary embodiment.

As shown in FIG. 9 , when charging is started, it is determined whether the charging is slow charging ( 510 ). For example, whether the charging is slow charging can be determined using whether the charging cables C1 and C2 are connected to the slow charging port 41 or the fast charging port 42 .

If it corresponds to slow charging (Yes in 510), it receives voltage/current data and battery voltage data of the internal charger (511). Voltage/current data of the internal charger may be received from the internal charger 140 , and battery voltage data may be received from the battery 110 .

An average charging current is obtained using the received data (512). Specifically, the charging output W may be calculated based on the voltage/current data received from the internal charger 140 . The storage unit 160 stores a charging current table in which an average charging current is mapped to an initial voltage of the battery and an average charging current for each charging output (W). An average charging current corresponding to the voltage and the charging output W may be obtained.

An expected charging time is calculated using the average charging current ( 513 ). As an example, the expected charging time t may be calculated using the above-mentioned [Equation 1]. In this case, the electric load consumption current _IE may be reflected, and the electric load consumption current may be a value learned and stored at each charge.

When the battery control unit 120 calculates the expected charging time according to the above-described process, the calculated expected charging time may be transmitted to the cluster 70 or the head unit 60 through an in-vehicle communication protocol such as CAN communication. . The cluster display 71 or the head unit display 61 may display the transmitted estimated charging time required.

As a method of displaying the estimated charging time required, a method of displaying the calculated time, a method of displaying an expected time of charging to be completed, or a method of displaying them simultaneously may be used.

When charging is completed (YES in 515), the battery controller 120 calculates an actual electric load consumption current (516). The actual charging average current is calculated by dividing the target charge amount C by the actual charging time required, and the actual electric load consumption generated during charging from the deviation between the average value of the charging current I _OBC of the slow charger 140 measured during charging and the actual charging average current current can be calculated.

The calculated electric load consumption current is learned and stored (517), and may be used to calculate an expected charging time for the next charging. The learning of the electric load consumption current is the same as described in the above-described embodiment of the vehicle 100 .

When the battery 110 is charged in the fast charging method (No in 510), the temperature and the state of charge (SOC) of the battery are measured ( 518 ), and the expected charging time is obtained based on the temperature and the state of charge of the battery. can (519). As an example, the storage unit 160 may store the charging time required according to the temperature and the state of charge (SOC) of the battery 110 in the form of a table, and the battery control unit 120 may store the battery 110 at the time of rapid charging based on the stored table. Estimated charging time can be obtained.

The estimated charging time required for fast charging may also be displayed on the cluster display 71 or the head unit display 61 ( 520 ). Alternatively, it is also possible that the expected charging time is transmitted to the quick charger 300 and displayed on the display provided in the quick charger 300 .

On the other hand, it is also possible to calculate and display the expected charging time only at the start of charging (corresponding to No ① of 515), and it is also possible to calculate and display the estimated remaining charging time during charging (corresponds to No ② of 515). do. In the latter case, it is possible to stably display the time during charging by limiting the time change rate.

According to the vehicle and the control method according to the above-described embodiment, the error with the actual charging time is minimized by calculating the expected charging time for each vehicle by reflecting the learning value of the electric load consumption during charging that may occur for each vehicle, By providing the user with the calculated estimated charging time, convenience can be improved so that the user can recognize the charging end point and use the time efficiently.

The above description is merely illustrative of the technical idea, and various modifications, changes and substitutions may be made by those skilled in the art without departing from the essential characteristics. Accordingly, the embodiments disclosed above and the accompanying drawings are for explanation rather than limiting the technical idea, and the scope of the technical idea is not limited by these embodiments and the accompanying drawings. The scope of protection should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of rights.

100: vehicle
110: battery
120: battery control unit
130: motor
140: internal charger
150: display unit

Claims (18)

Batteries capable of slow or fast charging;
an internal charger for slowly charging the battery;
a battery control unit configured to calculate an expected charging time required by using the average charging current of the internal charger and the learned electric load consumption current of the vehicle when the battery is slowly charged; and
Including; a display unit for displaying the calculated expected charging time required;
The battery control unit,
When the slow charging of the battery is completed, calculating the actual electric load consumption current, and learning the learned electric load consumption current again using the calculated actual electric load consumption current,
When the slow charging of the battery is completed, a first current value that is an average value of the charging current of the slow charger measured during charging of the battery is obtained, and the target charging amount is divided by the actual time required for the slow charging of the battery to obtain a second current a vehicle for obtaining a value and calculating the actual electric field load consumption current from a deviation between the first current value and the second current value. delete The method of claim 1,
The vehicle further comprising; a storage unit for storing the learned electric load consumption current. delete The method of claim 1,
The battery control unit,
The vehicle re-learning the learned electric load consumption current by averaging the learned electric load consumption current and the actual electric load consumption current. The method of claim 1,
The battery control unit,
A vehicle that calculates an expected charging time required for the next slow charging of the battery using the re-learned electric load consumption current. The method of claim 1,
The battery control unit,
The vehicle obtains the average charging current from a table in which the initial voltage of the battery and the average charging current according to the charging output of the internal charger are mapped. The method of claim 1,
The battery control unit,
The vehicle calculates the expected charging time required by dividing the target charging amount of the battery by a deviation between the average charging current and the learned electric load consumption current. The method of claim 1,
The battery control unit,
During the slow charging of the battery, the vehicle periodically calculates the expected charging time required, and updates the expected charging time displayed on the display unit. The method of claim 1,
The display unit,
A vehicle comprising at least one of a cluster display and a head unit display. when charging the battery slowly, acquiring an average charging current of the internal charger used for slow charging the battery;
calculating an expected charging time using the average charging current and the learned electric load consumption current of the vehicle;
displaying the calculated expected charging time;
when the slow charging of the battery is completed, calculating an actual electric load consumption current;
Re-learning the learned electric load consumption current using the calculated actual electric load consumption current,
Calculating the actual electric load consumption current includes, when the slow charging of the battery is completed, obtaining a first current value that is an average value of the charging current of the slow charger measured during charging of the battery, and setting the target charging amount as the slow charging of the battery A method of controlling a vehicle, comprising: obtaining a second current value by dividing by the actual time required for charging, and calculating the actual electric load consumption current from a deviation between the first current value and the second current value. delete 12. The method of claim 11,
Storing the learned electric load consumption current; Control method of a vehicle further comprising a. delete 12. The method of claim 11,
Re-learning the learned electric load consumption current is,
and averaging the learned electric load consumption current and the actual electric load consumption current. 12. The method of claim 11,
The method of controlling a vehicle further comprising; calculating an expected charging time using the re-learned electric load consumption current during the next slow charging of the battery. 12. The method of claim 11,
To obtain the average charging current,
and obtaining the average charging current from a table in which the initial voltage of the battery and the average charging current according to the charging output of the internal charger are mapped. 12. The method of claim 11,
The method of controlling a vehicle further comprising a; periodically calculating the expected charging time required during the slow charging of the battery and updating the displayed expected charging time required.

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