KR101018438B1 - Separate control system of high voltage and low voltage for electric vehicle - Google Patents

Abstract

The disclosed high voltage and low voltage separation control system for an electric vehicle is applied to an electric vehicle having a high voltage operation module operating at a high voltage and a low voltage operation module operating at a low voltage. The system includes a first switch for switching a high voltage transferred from a battery to a high voltage operation module, the battery being supplied from an external power supply and charged between a battery and a high voltage operation module charged with power required for driving an electric vehicle; A second switch disposed between the battery and the low voltage operation module to control the low voltage transferred from the battery to the low voltage operation module, and controlling opening and closing of the first switch and the second switch, and the first switch while the battery is being charged. And a switch controller for opening the door and shielding the second switch. Therefore, when the electric vehicle is charged, the high voltage operation module and the low voltage operation module are separated and controlled, thereby reducing power consumption and charging time, thereby improving charging efficiency.

Description

High voltage and low voltage separation control system for electric vehicles {DECOUPLED CONTROL SYSTEM FOR HIGH AND LOW VOLTAGE CIRCUIT STRUCTURE FOR AN ELECTRIC VEHICLE}

The present invention relates to a high voltage and low voltage separation control system for an electric vehicle, and more particularly, to separate and control a high voltage operation module and a low voltage operation module, and to charge a battery of an electric vehicle using a high voltage operation module using a switch. A high voltage and low voltage separation control system for an electric vehicle to shut off.

The demand for automobiles is exploding with economic development, and as the demand for automobiles increases, the exhaust gas emitted from automobiles is the main cause of environmental pollution.

Accordingly, there is a demand for reducing the emission of automobiles, and research and development of automobiles that can reduce the emission of gas are proceeding. Furthermore, commercialization of electric vehicles that do not generate emissions is partially attempted.

An electric vehicle refers to a vehicle that operates by using electricity as a power source, and includes a battery that can be charged as a power source in the vehicle itself, and operates by using electric power supplied from the mounted battery.

An electric vehicle is mainly composed of an electric motor driven by electricity to drive an electric vehicle, and a battery for supplying electricity to the electric motor.

Recently, the plug-in charging method has been mainly used and developed to supply and charge the battery. The plug-in method refers to a method of supplying and charging power to a battery once through a plug-in charging device of an electric vehicle and operating the electric vehicle by using the same.

The plug-in charging method takes a long time to charge the battery for an electric vehicle, and the distance driven by charging once is limited. In general, charging of an electric vehicle takes about 1 to 8 hours, and it is difficult to manage the vehicle safely during such a long charging time.

Therefore, the electric vehicle has to be frequently charged in order to secure the intended travel distance, so the installation of the charging station and the charging system are very important issues in the operation of the electric vehicle.

In addition, the charging should be performed while being not affected by the external environment such as rain or snow during charging. Furthermore, when the charging system of an electric vehicle is shaped like a current gas station, it cannot meet the demand for charging.

As such, there is a need for a charging system suitable for commercialization of electric vehicles.

An object of the present invention is to provide a separate control system for a high voltage and low voltage for an electric vehicle for improving the charging efficiency of the battery by blocking the high voltage operation module using a switch when charging the battery of the electric vehicle.

In order to achieve the above object of the present invention, an electric vehicle high voltage and low voltage separation control system according to embodiments of the present invention is provided in an electric vehicle having a high voltage operation module operating at a high voltage and a low voltage operation module operating at a low voltage. Apply. The system is configured to switch a high voltage that is supplied from an external power supply device to a battery in which power required for driving the electric vehicle is charged, and is disposed between the battery and the high voltage operation module and transferred from the battery to the high voltage operation module. A first switch disposed between the battery and the low voltage operation module, a second switch for switching a low voltage transferred from the battery to the low voltage operation module, and controlling opening and closing of the first switch and the second switch, And a switch controller configured to open the first switch and block the second switch while the battery is being charged with power.

In embodiments of the present invention, the switch control unit shields the first switch and the second switch when the electric vehicle is driving.

In embodiments of the present invention, the switch control unit may be formed as a key box of the electric vehicle. In this case, when the key box is in the 'START' mode, the first switch is opened and the second switch is blocked, and when the key box is in the 'DRIVE' mode, the first switch is opened. And the second switch.

In embodiments of the present disclosure, the system may further include a battery controller operating at the low voltage and managing and controlling a state of the battery.

In the embodiments of the present invention, when the external power supply device supplies power to the electric vehicle by a non-contact magnetic induction charging method, the system is a pickup (PICK-) that receives AC power from a feeder line embedded in the road. And a regulator for converting AC power received from the UP) module and the pickup module into DC power, and supplying the converted DC power to the high voltage operation module, the low voltage operation module, and a battery.

In embodiments of the present invention, when the external power supply device supplies power to the electric vehicle by a plug-in charging method, the system is a plug-in power source for receiving power from the external power supply device. It may further include an input unit.

According to the separation control system of the high voltage and low voltage for an electric vehicle according to the present invention as described above has the following effects.

First, by separating and controlling the high voltage operation module and the low voltage operation module, it is possible to efficiently control the power of the electric vehicle.

Second, when charging power to the battery by cutting off the high voltage operation module using a switch, it is possible to reduce the charging time of the battery and improve the charging efficiency.

Third, since the high voltage operation module does not operate when charging the battery, power consumption may be reduced.

With reference to the accompanying drawings will be described in detail with respect to the high voltage and low voltage separation control system for an electric vehicle according to embodiments of the present invention. As the inventive concept allows for various changes and numerous modifications, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structure is shown to be larger than the actual size for clarity of the invention, or to reduce the actual size to understand the schematic configuration.

In addition, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms 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 the second component, and similarly, the second component may also be referred to as the first component. On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

1 is a block diagram illustrating a separate control system of a high voltage and a low voltage for an electric vehicle according to embodiments of the present invention.

Referring to FIG. 1, a high voltage and low voltage separation control system for an electric vehicle according to an embodiment of the present invention (hereinafter referred to as “the present system”) is a high voltage operating module 10 operating at a high voltage and a low voltage operation operating at a low voltage. The module 20 is provided and controlled separately.

Accordingly, the system 1 includes a battery 40, a first switch 50, a second switch 60, and a switch controller 70 that charges power supplied from the external power supply device 30.

The battery 40 receives power from the external power supply device 30 and is charged with power required for driving the electric vehicle. In addition, the battery 40 may receive power from the external power supply device 30 to charge the battery 40, and receive the remaining power remaining after driving the high voltage operation module 10 and / or the low voltage operation module 20. You can also charge.

The first switch 50 is disposed between the battery 40 and the high voltage operation module 10. In addition, the first switch 50 transmits or blocks a high voltage from the battery 40 to the high voltage operation module 10 through a switching operation.

The second switch 60 is disposed between the battery 40 and the low voltage operation module 20. In addition, the second switch 60 transmits or cuts off the low voltage from the battery 40 to the low voltage operation module 20 through the switching operation.

The switch controller 70 controls the switching operation of the first switch 50 and the second switch 60. That is, the switch controller 70 determines whether the first switch 50 and the second switch 60 are opened or closed.

In the embodiment of the present invention, since the high voltage operation module 10 does not need to operate while the battery 40 is being charged, the switch controller 70 opens the first switch 50 and the second switch. (60) is blocked. That is, when the battery 40 is being charged, the switch controller 70 opens the first switch 50 to block the high voltage from being transmitted to the high voltage operation module 10, and shuts off the second switch 60. Only low voltage is passed to the low voltage operation module 20.

In addition, since the high voltage operation module 100 needs to be driven when the vehicle is driving, the switch controller 70 shields both the first switch 50 and the second switch 60 so that the high voltage operation module ( The high voltage is transmitted to the low voltage operation module 20 and the low voltage is transmitted to the low voltage operation module 20. Meanwhile, the high voltage and / or low voltage is supplied from the external power supply device 30 to the high voltage operation module 10 and / or the low voltage operation module 20. May be delivered.

In embodiments of the present invention, the system 1 may further include a battery control system (BMS) for managing and controlling the state of the battery 40. Since the battery control unit 80 operates by the low voltage and the low voltage is continuously transmitted by the second switch 60 even when the battery 40 is charged, the battery control unit 80 maintains the state of charge of the battery 40. Can be controlled by

FIG. 2 is a configuration diagram illustrating an embodiment of the control system disclosed in FIG. 1.

Referring to FIG. 2, the switch controller 70 according to embodiments of the present invention may be configured as a key box of an electric vehicle.

In this case, the key box may have a key box mode for operating the low voltage operation mode and the high voltage operation mode through selection of an input key. For example, when the key entered in the key box selects the 'START mode', it may be a low voltage operation mode, and when the key entered in the key box selects the 'DRIVE mode'. Can be a high voltage operating mode. Therefore, when the key box is in the 'START' mode, the switch controller 70 opens the first switch 50 and shields the second switch 60. In addition, the switch controller 70 shields the first switch 50 and the second switch 60 when the key box is in the DRIVE mode.

As described above, when the switch control unit 70 is a key box, the operation of the first switch 50 and the second switch 60 is controlled by the selection of a key input to the key box, so that a high voltage and And / or provide a low voltage.

According to embodiments of the present invention, the external power supply device 30a may supply power to the battery 40 and the internal operation modules 10 and 20 by a non-contact magnetic induction charging method. At this time, the system 1 includes a pick-up (PICK-UP) module 90 and a regulator (95).

The pickup module 90 receives AC power from the feeder line 30a embedded in the road. In addition, the regulator 95 converts the AC power received from the pickup module 90 into DC power, and supplies the converted DC power to the high voltage operation module 10, the low voltage operation module 20, and the battery 40. .

According to other embodiments of the present disclosure, the external power supply device 30 may supply power to the battery 40 and the internal operation modules 10 and 20 by a plug-in charging method. At this time, the system 1 may further include a plug-in power input unit (not shown) for receiving power from the external power supply device 30b.

As such, the system 1 may block the transfer of the high voltage to the high voltage operation module 10 by the first switch 50 and the switch controller 70 when charging the power to the battery 40. Therefore, by controlling the operation of the high voltage operation module 10 that consumes a lot of power during charging, it is possible to reduce the charging time and improve the charging efficiency.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

1 is a block diagram illustrating a separate control system of a high voltage and a low voltage for an electric vehicle according to embodiments of the present invention.

FIG. 2 is a configuration diagram illustrating an embodiment of the control system disclosed in FIG. 1.

<Description of the symbols for the main parts of the drawings>

1: Separate control system of high voltage and low voltage for electric vehicle

10: high voltage operation module 20: low voltage operation module

30: external power supply 40: battery

50: first switch 60: second switch

70: switch control unit 80: switch control unit

Claims (6)

An electric vehicle having a high voltage operating module operating at a high voltage and a low voltage operating module operating at a low voltage, A battery charged with power required for driving the electric vehicle by receiving power from an external power supply device; A first switch disposed between the battery and the high voltage operation module to switch a high voltage transferred from the battery to the high voltage operation module; A second switch disposed between the battery and the low voltage operation module to switch a low voltage transferred from the battery to the low voltage operation module; And Controlling the opening and closing of the first switch and the second switch, the power control of the high voltage and low voltage for an electric vehicle including a switch control unit for opening the first switch and the second switch while the power is being charged to the battery system. The method of claim 1, wherein the switch control unit When the electric vehicle is driving, the high voltage and low voltage separation control system for an electric vehicle, characterized in that for shielding the first switch and the second switch. The method of claim 1, The switch control unit is composed of a key box of the electric vehicle, When the key box is in the 'START' mode, the first switch is opened and the second switch is blocked. When the key box is in the 'DRIVE' mode, the first switch and the second switch are closed. High voltage and low voltage separation control system for an electric vehicle, characterized in that the shielding the switch. The method of claim 1, And a battery controller configured to operate at the low voltage and to manage and control a state of the battery. The method of claim 1, When the external power supply device supplies power to the electric vehicle by a non-contact magnetic induction charging method, Pick-up (PICK-UP) module for receiving AC power from a feed line embedded in the road; And Converting the AC power received from the pickup module to DC power, and a high voltage for an electric vehicle, characterized in that it further comprises a regulator (regulator) for supplying the converted DC power to the high voltage operation module, low voltage operation module and a battery Control system of overvoltage and low voltage. The method of claim 1, When the external power supply device supplies power to the electric vehicle by a plug-in charging method, Separation control system for a high voltage and low voltage for an electric vehicle further comprises a plug-in power input for receiving power from the external power supply.

Images