KR101144467B1 - Malfunction preventing electrical control unit for lowering voltage of main battery and driving method thereof - Google Patents

Malfunction preventing electrical control unit for lowering voltage of main battery and driving method thereof Download PDF

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Publication number
KR101144467B1
KR101144467B1 KR20100056507A KR20100056507A KR101144467B1 KR 101144467 B1 KR101144467 B1 KR 101144467B1 KR 20100056507 A KR20100056507 A KR 20100056507A KR 20100056507 A KR20100056507 A KR 20100056507A KR 101144467 B1 KR101144467 B1 KR 101144467B1
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South Korea
Prior art keywords
main battery
voltage
low voltage
electrically connected
battery
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KR20100056507A
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Korean (ko)
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KR20110136468A (en
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김인수
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현대자동차주식회사
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Abstract

The present invention relates to an electronic controller and a driving method thereof for preventing the low voltage failure of the main battery. When the voltage of the main battery is lowered by discharge and becomes a low voltage that cannot drive the electronic controller, The switch device connected between the main batteries connects between the auxiliary battery and the electronic controller. When the voltage of the main battery decreases, the electronic controller can be driven through the voltage of the auxiliary battery.

Description

Electronic controller and its driving method for countermeasure of low voltage failure of main battery {MALFUNCTION PREVENTING ELECTRICAL CONTROL UNIT FOR LOWERING VOLTAGE OF MAIN BATTERY AND DRIVING METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic controller and a driving method thereof for preventing a low voltage failure of a main battery. More particularly, the present invention relates to a voltage of an auxiliary battery even when the voltage of the main battery is lowered by discharge and becomes a low voltage at which the electronic controller cannot be driven. The present invention relates to an electronic controller and a driving method thereof for preventing the low voltage failure of the main battery capable of driving the electronic controller.

The vehicle's electronic break-by-wire system, an electric drive system driven by a drive motor as a power source, and a motor driven power steering system are connected to a motor driven by a voltage applied from a battery. Driven by

In addition, the motor used in the electronic system is driven by the control of an electronic control unit driven by the voltage of the battery.

Such an electronic controller is driven by applying a voltage of a predetermined voltage or more from a battery for driving. However, when the voltage of the battery is lower than the predetermined voltage due to the discharge, the electronic controller does not receive enough voltage, so the control signal for controlling the motor is not outputted normally, resulting in an error in the driving control of the motor. Therefore, a malfunction occurs in the electronic system, which may cause a danger to the vehicle.

The present invention is to overcome the above-mentioned conventional problems, an object of the present invention is to drive the electronic controller through the voltage of the auxiliary battery even if the voltage of the main battery is lowered by the discharge, the low voltage that can not drive the electronic controller The present invention provides an electronic controller and a driving method thereof for countermeasure of a low voltage failure of a main battery.

In addition, another object of the present invention is to provide an electronic controller and a method of driving the same for a low voltage failure countermeasure of the main battery which can maintain the continuity of voltage even when the voltage source is changed from the main battery to the auxiliary battery through a capacitor electrically connected to the electronic controller. To provide.

In order to achieve the above object, the electronic controller and the driving method thereof for the low voltage failure countermeasure of the main battery according to the present invention include a control unit for controlling the driving of the motor, and electrically connected between the main battery and the control unit. When the voltage is transmitted to the control unit, and the main battery is less than the reference low voltage, and electrically connected to the auxiliary battery, the switch element for transferring the voltage of the auxiliary battery to the control unit and electrically connected between the switch element and the control unit And a capacitor configured to store a voltage applied to the controller through the switch element.

The capacitor may have a first electrode electrically connected to the negative electrodes of the main battery and the auxiliary battery, and a second electrode may be electrically connected to the switch element to maintain continuity of voltage applied to the controller.

The switch element may include a first electrode electrically connected to the capacitor and the controller, and a second electrode electrically connected to one of the positive electrode of the main battery and the positive electrode of the auxiliary battery according to the voltage level of the main battery. Can be.

The controller may further include a motor power terminal electrically connected to the main battery, and the motor may receive a main battery through the motor power terminal even when the voltage of the main battery is less than a reference low voltage.

In addition, to achieve the above object, the electronic controller and the driving method for the low voltage failure countermeasure of the main battery according to the present invention is monitored by the electronic controller to monitor the voltage of the main battery, the low voltage check step of determining whether or not below the reference low voltage; And when it is determined that the voltage of the main battery is lower than a reference low voltage, a switch for controlling a switch element, which is electrically connected between the main battery and a control unit of the electronic controller that controls the driving of the motor, to connect between the auxiliary battery and the control unit. The device control step may include a warning step of notifying the driver that the voltage of the main battery is low voltage.

In the switch element control step, when the switch element electrically connected to the main battery is separated from the main battery and electrically connected to the auxiliary battery, a capacitor connected in parallel to an input terminal of the electronic controller is applied to the electronic controller. Voltage continuity can be maintained.

The electronic controller and its driving method for preventing the low voltage failure of the main battery according to the present invention drive the electronic controller through the voltage of the auxiliary battery even if the voltage of the main battery is lowered due to the discharge, and the low voltage which cannot drive the electronic controller. You can do it.

In addition, the electronic controller and the driving method thereof for preventing the low voltage failure of the main battery according to the present invention can maintain the continuity of the voltage even when the voltage source is changed from the main battery to the auxiliary battery through a capacitor electrically connected to the electronic controller.

1 is a structural diagram illustrating an electronic controller for a low voltage failure countermeasure of a main battery according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating a method of driving an electronic controller for a low voltage failure countermeasure of the main battery of FIG. 1.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

Referring to FIG. 1, there is shown a structural diagram illustrating an electronic controller for countermeasure of low voltage failure of a main battery according to an embodiment of the present invention.

As shown in FIG. 1, the electronic controller 10 for countermeasure of low voltage failure of the main battery includes a controller 11, a switch element 12, and a capacitor 13.

First, the control unit 11 is electrically connected to the motor M. If the voltage of the main battery MB is not in a low voltage state, the control unit 11 is driven by receiving a voltage applied from the main battery MB, and the driving of the motor M is performed. To control. Here, the motor M may be a braking motor for controlling the operation of the electric brake, a driving motor which is a power source of the vehicle, a steering motor for controlling the operation of the electric steering device, and a similarly operating motor.

The controller 11 determines whether the voltage of the main battery MB is a low voltage and controls the operation of the switch element 12.

In addition, a switch element 12 for applying or blocking the voltage of the main battery MB to the controller 11 is electrically connected between the controller 11 and the main battery MB.

In the switch element 12, a first electrode is electrically connected to the first electrode of the capacitor 13 and the controller 11, and a second electrode is electrically connected to the main battery MB or the auxiliary battery SB. .

When the voltage of the main battery MB is greater than or equal to the reference low voltage Vlr, the second electrode of the switch element 12 is electrically connected to the main battery MB, and the voltage of the main battery MB is referred to as the reference low voltage Vlr. In this case, the second electrode of the switch element 12 is electrically connected to the auxiliary battery SB.

That is, when the voltage of the main battery MB is greater than or equal to the reference low voltage Vlr, the switch element 12 applies the main battery MB voltage to the controller 11, and the voltage of the main battery MB is equal to the reference low voltage (V). If less than Vlr), the auxiliary battery SB voltage is applied to the controller 11.

Therefore, the controller 11 is driven by the voltage of the main battery MB when the voltage of the main battery MB is greater than or equal to the reference low voltage Vlr, and when the voltage of the main battery MB is less than the reference low voltage Vlr. It is driven by the voltage of the auxiliary battery SB.

At this time, the motor M receives power through the motor power terminal 11a of the controller 11. The motor power terminal 11a applies a voltage by the main battery MB to the motor M. As shown in FIG. That is, even when the voltage of the main battery MB is equal to or less than the reference low voltage Vlr, the electronic controller 10 is driven by the voltage of the auxiliary battery SB, and the motor M is a motor power source of the electronic controller 10. It is driven by the voltage of the main battery MB applied through the terminal 11a. As such, the driving of the motor M is controlled to be driven by the voltage of the main battery MB, so that the capacity of the auxiliary battery SB may not be increased to drive the motor M. FIG.

In the capacitor 13, the first electrode 1 is electrically connected to the switch element 12 and the control unit 11, and the second electrode 2 is the negative electrode (−) of the main battery MB and the auxiliary battery ( It is electrically connected to the negative electrode (-) of the SB and the control unit 11.

The capacitor 13 has a control unit when the voltage of the main battery MB is lower than the reference low voltage Vlr, so that the second electrode of the switch element 12 is changed from the main battery MB to the auxiliary battery SB. 11) The voltage applied to maintain continuity.

That is, since the capacitor 13 stores the voltage applied across the capacitor 13, the low voltage applied to the controller 11 is changed from the voltage applied from the main battery MB to the voltage applied from the auxiliary battery SB. At the moment, the main battery MB of the voltage applied to the control unit 11 is maintained.

In addition, since the voltage of the main battery MB is lowered due to the discharge and becomes a low voltage at which the electronic controller 10 cannot be driven, the voltage can be applied through the auxiliary battery SB. Even if the electronic controller 10 is driven by the voltage applied from the auxiliary battery SB, the driving of the motor M may be controlled.

Referring to FIG. 2, a flowchart illustrating a method of driving an electronic controller for a low voltage failure countermeasure of the main battery of FIG. 1 is illustrated. Hereinafter, a method of driving the electronic controller for the low voltage failure countermeasure of the main battery of FIG. 2 will be described through the electronic controller for the low voltage failure countermeasure of the main battery of FIG. 1.

First, in order to check whether the voltage of the main battery MB is less than the reference low voltage Vlr, the main battery MB voltage measuring step S1 for monitoring the voltage of the main battery MB is performed.

Then, the low voltage checking step S2 of determining whether the voltage of the monitored main battery MB is less than the reference low voltage Vlr is executed. In the low voltage checking step S2, it is checked whether the voltage of the main battery MB is smaller than the reference low voltage Vlr which is a minimum voltage for driving the controller 11 of the electronic controller 10 normally.

If the voltage of the main battery MB is greater than or equal to the reference low voltage Vlr in the low voltage checking step S2, the second electrode 2 of the switch element 12 remains connected to the main battery MB, and the main The drive for the low voltage fault countermeasure of the battery is terminated.

If the voltage of the main battery MB is less than the reference low voltage Vlr in the low voltage checking step S2, the second electrode of the switch element 12 that is electrically connected to the positive electrode + of the main battery MB. A switch element control step S3 for controlling the switch element 12 to separate 2) from the positive electrode + of the main battery MB and to the positive electrode + of the auxiliary battery SB is performed.

After the switch element control step S3, a warning step S4 is performed to notify the driver that the main battery MB is in a low voltage state. Such a warning may inform a driver through a cluster that the voltage of the main battery MB is lower than or equal to a low voltage, thereby inducing stopping of driving of the vehicle, thereby preventing a dangerous situation caused by discharge.

What has been described above is only one embodiment for implementing an electronic controller and a driving method thereof for preventing the low voltage failure of the main battery according to the present invention, the present invention is not limited to the above-described embodiment, the following claims As claimed in the scope of the present invention, those skilled in the art to which the present invention pertains will have the technical spirit of the present invention to the extent that various modifications can be made without departing from the gist of the present invention.

10; Electronic controller for low voltage fault protection of main battery
11; Control unit 12; Switch element
13; Capacitor

Claims (6)

A control unit for controlling driving of the motor;
Electrically connected between the main battery and the controller to transfer the voltage of the main battery to the controller, and when the main battery is less than the reference low voltage, electrically connected to the auxiliary battery, and transfer the voltage of the auxiliary battery to the controller. A switch element; And
And a capacitor electrically connected between the switch element and the control unit to store a voltage applied to the control unit through the switch element. The method according to claim 1,
The capacitor may have a first electrode electrically connected to the negative electrodes of the main battery and the auxiliary battery, and a second electrode may be electrically connected to the switch element to maintain continuity of voltage applied to the controller. Electronic controller for low voltage fault protection of main battery. The method according to claim 1,
The switch element may include a first electrode electrically connected to the capacitor and the controller, and a second electrode electrically connected to one of the positive electrode of the main battery and the positive electrode of the auxiliary battery according to the voltage level of the main battery. Electronic controller for the low voltage failure countermeasure of the main battery, characterized in that the. The method according to claim 1,
The control unit may further include a motor power terminal electrically connected to the main battery, and even when the voltage of the main battery is less than a reference low voltage, the motor is supplied with the main battery through the motor power terminal. Electronic controller for low voltage fault protection. delete A low voltage checking step of monitoring a voltage of the main battery in an electronic controller to determine whether the voltage is lower than a reference low voltage;
If it is determined that the voltage of the main battery is less than the reference low voltage, the switch element which is electrically connected between the controller of the electronic controller for controlling the drive of the main battery and the motor is controlled to connect between the auxiliary battery and the controller, When the switch element electrically connected to the main battery is separated from the main battery and electrically connected to the auxiliary battery, a switch connected in parallel to an input terminal of the electronic controller maintains the continuity of the voltage applied to the electronic controller. Device control step; And
A warning step of informing the driver that the voltage of the main battery is low voltage;
Method of driving the electronic controller for the low voltage failure countermeasure of the main battery, characterized in that made.
KR20100056507A 2010-06-15 2010-06-15 Malfunction preventing electrical control unit for lowering voltage of main battery and driving method thereof KR101144467B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180138312A (en) * 2017-06-21 2018-12-31 현대자동차주식회사 Vehicle and method for controlling thereof
KR102251802B1 (en) * 2020-12-03 2021-05-13 (주)엠알솔루텍 Battery operating apparatus for fire fighting lights and its method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102390394B1 (en) * 2018-05-15 2022-04-22 주식회사 엘지에너지솔루션 Apparatus and method for controlling main battery and sub battery

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05137202A (en) * 1991-06-20 1993-06-01 Honda Motor Co Ltd Residual capacity notifying system for battery
JPH0970103A (en) * 1995-08-30 1997-03-11 Hitachi Ltd Controller for motor-driven carrier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05137202A (en) * 1991-06-20 1993-06-01 Honda Motor Co Ltd Residual capacity notifying system for battery
JPH0970103A (en) * 1995-08-30 1997-03-11 Hitachi Ltd Controller for motor-driven carrier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180138312A (en) * 2017-06-21 2018-12-31 현대자동차주식회사 Vehicle and method for controlling thereof
KR102335636B1 (en) * 2017-06-21 2021-12-07 현대자동차주식회사 Vehicle and method for controlling thereof
KR102251802B1 (en) * 2020-12-03 2021-05-13 (주)엠알솔루텍 Battery operating apparatus for fire fighting lights and its method

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