KR101573629B1 - Apparatus and method for starting control of vehicle - Google Patents

Abstract

The present invention relates to an apparatus and a method for starting control of a vehicle. According to the present invention, the apparatus comprises: a secondary battery providing starting power of a vehicle; a main battery providing power to a main power supply system and the secondary battery; a control unit outputting a control signal for at least one cell voltage of the main battery to be provided to the secondary battery in case a voltage of the secondary battery which is measured is less than a first reference value in case of a vehicle starting request; and a switch unit opening or short-circuiting a line wherein power supply is supplied to the secondary battery by the control signal from the control unit between the main battery and the secondary battery.

Description

[0001] Apparatus and method for starting control of a vehicle [

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an apparatus and method for starting a vehicle, and more particularly, to a technique for supplying starting power of an auxiliary battery using a main battery.

In recent years, hybrid vehicles, plug-in hybrid vehicles, fuel cell vehicles, and electric vehicles are equipped with high-voltage main batteries that provide the vehicle with main power, and additional secondary batteries are mounted. The auxiliary battery may provide a starting power for driving the starter of the vehicle.

However, when the auxiliary battery is discharged, there is a problem that the vehicle can not be started even when the residual voltage of the main battery is sufficient. Therefore, when the auxiliary battery is discharged, it is required to try to start the emergency using the power of the main battery.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicular electric vehicle which is driven by a relay or a switch according to a power state of an auxiliary battery when a state of charge of the auxiliary battery is low, And a start-up control device and method for the start-up control.

It is another object of the present invention to provide an apparatus and method for controlling start-up of a vehicle that combines at least one cell of a main battery to provide power to an auxiliary battery.

According to an aspect of the present invention, there is provided an apparatus for controlling a starting of a vehicle, including: a main battery for supplying power to the main battery of the vehicle; a main battery for supplying power to the auxiliary battery; A control unit for measuring a voltage of the auxiliary battery and outputting a control signal so that at least one cell voltage of the main battery is provided to the auxiliary battery when the measured voltage is less than a first reference value, And a switch unit for opening or shorting a line to which power is supplied to the auxiliary battery by a control signal from the control unit.

The starting control device of the vehicle further includes a cell combining unit for selecting and combining at least one cell for supplying power to the auxiliary battery according to a voltage value measured from at least one cell of the main battery do.

And the cell combining unit selects a cell having a larger voltage value of the cell as a priority order.

And the cell combining unit is adapted to cause the voltage value of the selected cell to be at least the starting voltage of the vehicle.

The cell combining unit selects at least two cells of the main battery and connects them in series or in parallel.

The switch unit includes a relay operated by a control unit of the vehicle, and a switch operated by a hard key.

Wherein the control unit causes the relay to be driven by the control unit of the vehicle if the voltage measured from the auxiliary battery is greater than or equal to a second reference value when a vehicle start request is made, So as to be driven.

And the control unit controls the switch unit so that the power supplied to the auxiliary battery is cut off when the start of the vehicle is turned on.

According to another aspect of the present invention, there is provided a method of controlling a start-up of a vehicle, the method comprising the steps of: measuring a voltage of an auxiliary battery providing a starting power of the vehicle when a vehicle start request is made; Outputting a control signal such that at least one cell voltage of the main battery is provided to the auxiliary battery when the voltage of the main battery is less than a first reference value, A step of shorting the switch means provided between the auxiliary batteries, and supplying the at least one cell voltage to the auxiliary battery to provide the starting voltage of the vehicle.

A method of controlling a start-up of a vehicle according to the present invention includes the steps of: measuring at least one cell voltage of the main battery; and determining at least one of the at least one cell voltage And a step of selecting one cell.

Wherein the step of outputting the control signal includes the steps of: when the voltage measured from the auxiliary battery is less than the first reference value, if the measured voltage is equal to or greater than the second reference value, The control unit outputs a control signal for driving the switch by the hard key.

In addition, the method of controlling a starting of a vehicle according to the present invention further includes the step of disconnecting the power supplied to the auxiliary battery by opening the switch means when the vehicle is turned on.

According to the present invention, the relay or the switch is driven according to the power state of the auxiliary battery to supply the starting power of the auxiliary battery through the power of the main battery, so that the auxiliary battery can be started through the main battery even when the auxiliary battery is discharged.

1 is a block diagram showing the configuration of a vehicle start control apparatus according to the present invention.
2 is an exemplary diagram referred to explain a cell selection operation for a vehicle start control apparatus according to the present invention.
3 is an exemplary diagram referred to describe the first embodiment of the vehicle start control apparatus according to the present invention.
4 is an exemplary diagram referred to explain a second embodiment of the vehicle start control apparatus according to the present invention.
5 and 6 are flowcharts showing the operation flow of the start control method of the vehicle according to the present invention.

It is noted that the technical terms used in the present invention are used only to describe specific embodiments and are not intended to limit the present invention. In addition, the technical terms used in the present invention should be construed in a sense generally understood by a person having ordinary skill in the art to which the present invention belongs, unless otherwise defined in the present invention, and an overly comprehensive It should not be construed as meaning or overly reduced. In addition, when a technical term used in the present invention is an erroneous technical term that does not accurately express the concept of the present invention, it should be understood that technical terms that can be understood by a person skilled in the art can be properly understood. In addition, the general terms used in the present invention should be interpreted according to a predefined or context, and should not be construed as being excessively reduced.

Furthermore, the singular expressions used in the present invention include plural expressions unless the context clearly dictates otherwise. The term "comprising" or "comprising" or the like in the present invention should not be construed as necessarily including the various elements or steps described in the invention, Or may include additional components or steps.

Furthermore, terms including ordinals such as first, second, etc. used in the present invention can be used to describe elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention and should not be construed as limiting the scope of the present invention.

1 is a block diagram showing the configuration of a vehicle start control apparatus according to the present invention.

1, a vehicle start control device (hereinafter, referred to as 'control device') according to the present invention includes a main battery 10, an auxiliary battery 20, a switching unit, a cell combination unit 50, (60) and a storage unit (70).

The main battery 10 is a means for supplying main power to the vehicle, and may be constituted by a plurality of cells. In addition, the main battery 10 can provide power to the auxiliary battery 20 in the start-off state. In addition, the auxiliary battery 20 provides power necessary for the vehicle to start in the start-off state of the vehicle. The auxiliary battery 20 can receive power from the main battery 10 when discharged.

The main battery 10 and the auxiliary battery 20 may be connected to the power supply line and the switch unit may be disposed on the power supply line between the main battery 10 and the auxiliary battery 20. [

The switch unit may include a relay 30 and a switch 40. [ Here, the relay 30 can be driven by the control unit 1 of the vehicle, for example, a battery management system (BMS) or the like, while maintaining the off state. Further, the switch 40 is kept in the open state, and can be pressed and operated by the inserted hard key 3 when the hard key 3 is inserted by the driver.

The switch unit can be turned on by the control unit 60 when voltage supply to the auxiliary battery 20 is required in the start-off state. In this case, the switch unit allows the power supplied from the main battery 10 to be transmitted to the auxiliary battery 20 through the power supply line. At this time, either one of the relay 30 and the switch 40 can be turned on according to the power state. On the other hand, the switch unit can be turned off by the control unit 60 when the start of the vehicle is turned on. In this case, the switch unit blocks power supply from the main battery 10 to the auxiliary battery 20.

The main battery 10 is comprised of a plurality of cells, each cell being connected in series or parallel and having a different capacitance. Accordingly, the cell combining unit 50 can select and combine at least one cell for supplying power to the auxiliary battery 20 according to the measured voltage value from at least one cell of the main battery 10. [ At this time, the cell combining unit 50 can select a cell having a large voltage value of the cell as a priority order. For example, when the voltage value of the cell of the main battery 10 is in the order of C1> C2> C3> C4 according to the capacity of each cell, You can select in order.

The cell combination unit 50 causes the selected cell voltage to have at least the starting voltage of the vehicle. In other words, the cell combination unit 50 allows the cells of the main battery 10 to select as many cells as can satisfy the starting voltage. As an example, if the capacity of C1 does not satisfy the starting voltage, the cell combining unit 50 selects C2 having the next priority after selecting C1. If the capacity of C1 + C2 does not satisfy the starting voltage even after selecting C1 and C2, the cell combining unit 50 also selects the C3 having the next priority.

The control unit 60 causes the main relay 10 to measure the cell voltage when the main relay 30 of the vehicle is in an on state. The control unit 60 may continuously or periodically measure the cell voltage of the main battery 10 until the main relay is off. At this time, the controller 60 may store the voltage of each cell measured from the cell of the main battery 10 in the memory.

When there is a request for a main relay off, the controller 60 provides voltage value information of the cells of the main battery 10 measured before the main relay off to the cell combiner 50 so that at least one cell is selected do. At this time, the control unit 60 stores at least one cell selection information selected by the cell combining unit 50 in the storage unit 70. [ The control unit 60 may store the cell selection information in the storage unit 70 and then turn off the main relay.

The control unit 60 causes the auxiliary battery 20 to measure the voltage when there is a start-up request in the start-off state of the vehicle. The control unit 60 starts the vehicle using the starting power of the auxiliary battery 20 if the voltage value of the auxiliary battery 20 is equal to or greater than the first reference value. Here, the first reference value may be a minimum starting voltage value required to start the vehicle.

If the voltage value of the auxiliary battery 20 is less than the first reference value, the controller 60 supplies the auxiliary battery 20 with a voltage using the power of the main battery 10. At this time, when the voltage of the auxiliary battery 20 is equal to or higher than the second reference value, the control unit 60 controls the control unit of the vehicle so that the relay 30 of the switch unit is driven. The control unit 60 can output a control signal for driving the relay 30 to the control unit of the vehicle. Here, the second reference value may be a minimum voltage value for driving the relay 30. Accordingly, if the minimum voltage for driving the relay 30 remains in the auxiliary battery 20, the controller 60 drives the relay 30 using the power of the auxiliary battery 20.

On the other hand, if the voltage of the auxiliary battery 20 is less than the second reference value, the controller 60 may output a message to induce insertion of the hard key 3 of the vehicle. At this time, when the hard key 3 is inserted from the driver, the switch 40 can be pressed by the hard key 3.

The control unit 60 combines the cells selected by the cell combining unit 50 to supply power to the auxiliary battery 20 when the relay 30 or switch 40 of the switch unit is turned on. If the starting power is applied to the auxiliary battery 20, the controller 60 drives the starter 5 using the supplied power source so that the vehicle is turned on. When the vehicle is in the starting-on state, the control unit 60 turns off the switch means of the relay 30 of the switch unit or the switch 40 of the switch unit 40, thereby turning off the power supplied to the auxiliary battery 20.

The storage unit 70 may store data, application programs, algorithms, and the like necessary for the controller to operate. At this time, the storage unit 70 may store an algorithm for selecting a cell of the main battery 10 or controlling the driving of the switch unit.

Here, the storage unit 70 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, an SD or XD memory A random access memory (SRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an electrically erasable programmable read-only memory (EEPROM) Erasable Programmable Read-Only Memory).

Each unit of the control apparatus according to the present invention can operate as described above in the emergency start mode when the auxiliary battery 20 is in a state in which the starting power is not sufficient. Of course, it is not limited thereto.

2 is an exemplary diagram referred to explain a cell selection operation for a vehicle start control apparatus according to the present invention.

As shown in FIG. 2, the main battery may include a plurality of cells. In the embodiment of FIG. 2, the main battery includes ten cells C0 to C9, but the present invention is not limited thereto. In FIG. 2, although the voltage values of the respective cells are shown as being different from each other, it is a matter of course that two or more cells may have the same voltage value.

Referring to FIG. 2, C0 of the cells of the main battery is A, C1 is B, C2 is C, C3 is D, C4 is E, C5 is F, C6 is G, C7 is H, C8 is I, If C9 is J, the magnitude of each voltage value is assumed to be I> B> D> F> E> J> A> C> G> H. At this time, the controller selects a cell for supplying power to the auxiliary battery according to the priority order of each cell among the ten cells included in the main battery. Here, each cell has a high priority in a cell having a large voltage value. Therefore, the control device selects cells in the order of C8 -> C1 -> C3 -> C5 -> C4 -> C9 -> C0 -> C2 -> C6 -> C7 according to the priority of each cell, As shown in FIG.

For example, if the starting power is 100, C8 = 35, C1 = 27, C3 = 24, C5 = 20, the control device selects C8, C1, C3, C5 as the cell for supplying power to the auxiliary battery . At this time, the control device can connect C8, C1, C3, and C5 in series. The control device may connect a plurality of cells in parallel according to the remaining amount of each cell, or may connect the remaining cells in series to each other in parallel.

3 is an exemplary diagram referred to describe the first embodiment of the vehicle start control apparatus according to the present invention. 3 shows the case where the voltage V2 of the auxiliary battery is less than the minimum voltage X for starting the vehicle and is equal to or greater than the minimum voltage alpha for driving the relay 30. [

3, assuming that the main battery includes ten cells C0 to C9 as shown in FIG. 2, the control device controls the cells for supplying the starting power of the auxiliary battery to C8, C1, C3, and C5. Accordingly, the control device combines C81 and C82 to correspond to selected cells of the main battery, and connects C11 and C12, C31 and C32, and C51 and C52 in combination.

The control device causes the relays disposed on the power supply line connecting the main battery and the auxiliary battery to be turned on by using the remaining power of the auxiliary battery when the vehicle is requested to turn on the vehicle, Provide power as auxiliary battery. At this time, the control unit can turn on the relay by using the control unit 1 provided in the vehicle, for example, a BMS (Battery Management System).

At this time, the controller may turn off the power supplied to the auxiliary battery so that the relay is turned off when the vehicle is turned on.

4 is an exemplary diagram referred to explain a second embodiment of the vehicle start control apparatus according to the present invention. The embodiment of FIG. 4 shows the case where the voltage V2 of the auxiliary battery is less than the minimum voltage? For relay driving.

Referring to FIG. 4, assuming that the main battery includes ten cells C0 to C9 as shown in FIG. 2, the control device sets cells for supplying starting power to the auxiliary batteries as C8, C1, C3, and C5. Accordingly, the control device combines C81 and C82 to correspond to selected cells of the main battery, and connects C11 and C12, C31 and C32, and C51 and C52 in combination.

The control device can induce the user to insert the hard key because there is no power remaining in the spare battery when the vehicle is requested to turn on the vehicle. Accordingly, when the user inserts the hard key and the switch 40 disposed on the power supply line connecting the main battery and the auxiliary battery is turned on, the power supplied from C8, C1, C3, and C5 is supplied as the auxiliary battery .

At this time, when the start-up of the vehicle is turned on, the control device turns off the switch so as to shut off the power supplied to the auxiliary battery.

The operation flow of the control device according to the present invention will be described in more detail as follows.

5 and 6 are flowcharts showing the operation flow of the start control method of the vehicle according to the present invention.

First, FIG. 5 shows a process of measuring a cell voltage of the main battery and selecting a cell for supplying power to the auxiliary battery.

As shown in FIG. 5, when the main relay connected to the main battery is on (S110), the control device measures at least one cell voltage of the main battery (S120).

Thereafter, when there is a request to turn off the main relay (S130), that is, when there is a start-off request, the control device selects at least one cell for supplying power to the auxiliary battery using the cell voltage measured in the step 'S120' (S140). At this time, the controller stores the cell selection information in step 'S140' in the memory (S150).

6 shows a process of supplying starting power of the auxiliary battery in the start-off state of the vehicle.

As shown in FIG. 6, if the vehicle is requested to start the vehicle in the start-off state of the vehicle (S210), the control device measures the voltage of the auxiliary battery (S220).

If the voltage of the auxiliary battery is equal to or greater than the first reference value X (S230) as a result of the 'S220' process, the controller starts the vehicle using the power of the auxiliary battery (S280).

If the voltage of the auxiliary battery is less than the first reference value X (S230) as a result of the 'S220' process (S230), the control device determines that the voltage of the auxiliary battery is lower than the second reference value ) Or more. If the voltage of the auxiliary battery is equal to or greater than the second reference value alpha (S240), the controller turns on the relay of the power supply line connecting the main battery and the auxiliary battery (S250) and supplies the voltage to the auxiliary battery (S270).

On the other hand, if the voltage of the auxiliary battery is less than the second reference value alpha (S240), the control device manually turns on the switch of the power supply line connecting the main battery and the auxiliary battery using the hard key (S260) And supplies a voltage to the battery (S270).

When starting power is supplied to the auxiliary battery, the control device starts the vehicle (S280). Thereafter, the control device turns off the relay that is turned on in step S250 or the switch that is turned on in the process of step S260 to block the voltage supplied to the auxiliary battery (S290).

The above processes may be implemented directly in hardware, software modules executed by a processor, or a combination of the two. The software modules may reside in storage media, such as memory and / or storage, such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs. An exemplary storage medium is coupled to the processor, which is capable of reading information from, and writing information to, the storage medium. Alternatively, the storage medium may be integral with the processor. The processor and the storage medium may reside within an application specific integrated circuit (ASIC). The ASIC may reside within the user terminal. Alternatively, the processor and the storage medium may reside as discrete components in a user terminal.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the essential characteristics of the invention. Therefore, the spirit of the present invention should not be construed as being limited to the embodiments described, and all technical ideas which are equivalent to or equivalent to the claims of the present invention are included in the scope of the present invention .

1: vehicle control unit 3: hard key
5: starter 10: main battery
20: auxiliary battery 30: relay
40: switch unit 50: cell combination unit
60: control unit 70:

Claims (12)

An auxiliary battery for providing starting power of the vehicle;
A main battery for supplying power to the main power source of the vehicle and the auxiliary battery;
A cell combination unit for selecting and combining at least one cell for supplying power to the auxiliary battery according to a voltage value measured from at least one cell of the main battery;
And a controller for measuring a voltage of the auxiliary battery when a vehicle start request is made, and when the measured voltage is less than a first reference value, at least one cell voltage selected by the cell combining unit among the cells of the main battery is supplied to the auxiliary battery And outputting the output signal; And
A switch unit for opening or shorting a line to which power is supplied to the auxiliary battery by a control signal from the control unit between the main battery and the auxiliary battery,
And a controller for controlling the start of the vehicle. delete The method according to claim 1,
The cell combining unit,
And a cell having a larger voltage value of said cell is selected in priority order. The method according to claim 1,
The cell combining unit,
The voltage value of the selected cell is at least the starting voltage of the vehicle. The method according to claim 1,
The cell combining unit,
Wherein at least two or more cells of the main battery are selected and connected in series or in parallel. The method according to claim 1,
Wherein,
A relay operated by a control unit of the vehicle; And
And a switch operated by a hard key. The method of claim 6,
Wherein,
The control unit of the vehicle drives the relay when the voltage measured from the auxiliary battery is equal to or greater than the second reference value and the switch is driven by the hard key if the voltage is less than the second reference value Wherein the starting control device of the vehicle is characterized by: The method according to claim 1,
Wherein,
Wherein the control unit controls the switch unit so that the power supplied to the auxiliary battery is cut off when the start of the vehicle is turned on. Measuring the voltage of the auxiliary battery providing the starting power of the vehicle when the vehicle start request is made;
Measuring at least one cell voltage of the main battery and selecting at least one cell for supplying power to the auxiliary battery according to a measured voltage value from at least one cell;
Outputting a control signal such that a voltage of the selected one of the cells of the main battery is provided to the auxiliary battery when a voltage measured from the auxiliary battery is less than a first reference value;
Shorting the switch means provided between the main battery and the auxiliary battery to supply power to the main power source of the vehicle and the auxiliary battery by the control signal; And
Supplying a voltage of the selected at least one cell to the auxiliary battery to supply a starting voltage of the vehicle
And controlling the starting of the vehicle. delete The method of claim 9,
Wherein the step of outputting the control signal comprises:
When the voltage measured from the auxiliary battery is less than the first reference value, the relay is driven by the control unit of the vehicle if the measured voltage is equal to or greater than the second reference value, and the switch is driven by the hard key if the measured voltage is less than the second reference value And outputs a control signal for controlling the starting of the vehicle. The method of claim 9,
Further comprising the step of: when the start of the vehicle is turned on, opening the switch means to cut off power supplied to the auxiliary battery.

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