KR101680297B1 - Apparatus for measuring current of high voltage battery in vehicle - Google Patents

Apparatus for measuring current of high voltage battery in vehicle Download PDF

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KR101680297B1
KR101680297B1 KR1020160003353A KR20160003353A KR101680297B1 KR 101680297 B1 KR101680297 B1 KR 101680297B1 KR 1020160003353 A KR1020160003353 A KR 1020160003353A KR 20160003353 A KR20160003353 A KR 20160003353A KR 101680297 B1 KR101680297 B1 KR 101680297B1
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voltage
high voltage
unit
battery
current
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KR1020160003353A
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Korean (ko)
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김춘식
서재형
박종민
최형흠
이종승
김성준
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태성전장주식회사
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    • G01R31/3624—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
    • B29D30/58—Applying bands of rubber treads, i.e. applying camel backs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/16—Auto-repairing or self-sealing arrangements or agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
    • B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
    • B60L11/1851—
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
    • G01R31/025—
    • G01R31/3606—
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
    • B60L2230/16—
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

Disclosed is a current measuring device for a high voltage battery for a vehicle which can measure a current in the high voltage battery in a plug-in hybrid vehicle or an electric vehicle by using a shunt resistor. The current measuring device for a high voltage battery for a vehicle according to an aspect of the present invention can comprise a printed circuit board, a shunt resistor, a current measuring unit, an insulated transmitting unit, and a controller area network (CAN) communication unit. The printed circuit board is divided into a low voltage unit and a high voltage unit at left and right sides thereof by an electrically insulated central insulation unit. The shunt resistor is connected to the high voltage battery. The current measuring unit is arranged in the high voltage unit of the printed circuit board, and measures a voltage across the shunt resistor to calculate a current value outputted from the high voltage battery. The insulated transmitting unit is arranged across the high voltage unit and the low voltage unit and enables the high voltage unit and the low voltage unit to transmit and receive electric signals to and from each other while insulated from each other. The CAN communication unit transmits the current value calculated in the current measuring unit to a battery control unit through CAN communication.

Description

자동차 고전압 배터리의 전류 측정 장치{Apparatus for measuring current of high voltage battery in vehicle}BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-

본 발명은 차량용 고전압 배터리의 전류를 측정하는 장치에 관한 것이다.The present invention relates to an apparatus for measuring the current of a high voltage battery for a vehicle.

하이브리드 자동차는 내연 엔진과 전기 자동차의 배터리 엔진을 동시에 장착하는 등 기존의 일반 차량에 비해 연비(燃費) 및 유해가스 배출량을 획기적으로 줄인 차세대 자동차를 말한다. 이 하이브리드 자동차는 고전압 배터리시스템, 인버터, 엔진, 모터, 미션으로 구성된다. 이 하이브리드 자동차는, 고전압 배터리시스템에 저장된 에너지를 인버터를 이용하여 모터에 전달하여 차량 시동, 가속, 엔진 고효율점 운행 등에 사용하고, 엔진에서 잉여 에너지가 발생하면 모터를 발전기로 이용하여 그 잉여 에너지를 배터리에 저장한다.Hybrid vehicles are the next-generation vehicles that significantly reduce fuel consumption and emissions compared to conventional vehicles, such as installing the internal combustion engine and the electric vehicle battery engine at the same time. This hybrid car consists of a high-voltage battery system, an inverter, an engine, a motor and a mission. In this hybrid vehicle, energy stored in a high-voltage battery system is transmitted to a motor using an inverter to drive the vehicle, accelerate, and operate the engine at high efficiency points. When surplus energy is generated in the engine, the motor is used as a generator to generate surplus energy Store it in the battery.

고전압 배터리시스템은 배터리제어기를 이용하여 온도, 전압, 전류 등을 측정하고 이를 이용하여 저장가능한 에너지 양이나 모터로 전달할 수 있는 에너지량을 계산하여 하이브리드 자동차의 제어에 사용한다. 즉, 배터리제어기는 SOC(state of charge), SOH(state of health), 가용방전전력, 충전가능전력 등을 차량 제어기에 통신이나 기타 다른 방법으로 전달한다. 또한, 배터리제어기는 배터리의 사용환경을 최적화하기 위하여 온도, 전압, 전류 등을 이용하여 냉각팬 제어를 통하여 최적화된 환경으로 냉각 제어를 하고, 추가적으로 이러한 물리적인 측정량을 바탕으로 페일 세이프티(fail safety)를 제어한다. The high-voltage battery system uses the battery controller to measure temperature, voltage, current, etc., and calculates the amount of energy that can be stored and the amount of energy that can be transferred to the motor to be used for controlling the hybrid vehicle. That is, the battery controller communicates state of charge (SOC), state of health (SOH), available discharge power, chargeable power, etc. to the vehicle controller through communication or other means. In order to optimize the battery usage environment, the battery controller performs cooling control to the optimized environment through the control of the cooling fan by using the temperature, voltage and current, and furthermore, based on this physical measurement amount, the fail safe ).

하이브리드 자동차를 비롯하여 전기자동차나 연료전지 자동차에서 사용하는 고전압 배터리시스템은 다수의 단위 전지(모듈)를 직렬로 연결하여 고전압을 만들고 이를 이용하여 높은 전력을 발생시킨다. 이때 사용되는 모듈의 개수는 필요 전력량에 따라 상이하나 일반적으로 100V 내지 400V 사이의 전압을 이용하게 된다. 또한, 사용되는 전력은 8kW 내지 60kW 사이이다. 이러한 전력을 발생하기 위하여 고전압 배터리시스템에는 수십 내지 수백 암페어(A) 정도의 전류가 흐르게 된다. 이 고전압 배터리시스템은 차량의 일반 전장과는 전기적인 절연(isolation)을 유지하여야 한다.A high voltage battery system used in a hybrid vehicle, an electric car or a fuel cell automobile generates a high voltage by generating a high voltage by connecting a plurality of unit cells (modules) in series. At this time, the number of the modules used varies depending on the required power amount, but generally a voltage between 100V and 400V is used. Also, the power used is between 8 kW and 60 kW. In order to generate such electric power, a high-voltage battery system has a current of several tens to hundreds of amperes (A). This high-voltage battery system should maintain electrical isolation from the vehicle's normal electrical field.

즉, 하이브리드 자동차의 최적화된 제어를 위해 고전압 배터리시스템의 전류를 측정하여야 하는데, 고전압 배터리시스템은 전장과의 전기적인 절연을 유지해야 하기 때문에, 고전압 배터리시스템의 전압측정방법과 전류측정 방법이 복잡해지고, 이로 인해 부품가격이 상승하는 문제가 발생한다.That is, in order to optimize the control of the hybrid vehicle, the current of the high-voltage battery system must be measured. Since the high-voltage battery system must maintain the electrical insulation with the electric field, the voltage measurement method and the current measurement method of the high- , Which causes a problem of an increase in the cost of parts.

고전압 배터리시스템의 전류를 측정하는 종래의 방법으로는, 개방루프형 홀센서를 이용한 전류측정방법과, 폐쇄루프형 홀센서를 이용한 방법이 있다. 이는 각각 전류센서로서 개방루프형 홀센서 및 폐쇄루프형 홀센서를 이용하여 고전압 배터리시스템의 전류를 측정하는 것이다. 그러나, 이러한 홀센서를 이용한 전류 측정방법은 정밀도가 낮다는 문제가 있다.As a conventional method for measuring the current of the high voltage battery system, there are a current measuring method using an open loop type hall sensor and a method using a closed loop type hall sensor. This is to measure the current of the high voltage battery system using an open loop type hall sensor and a closed loop type hall sensor as current sensors, respectively. However, there is a problem that the accuracy of the current measuring method using the Hall sensor is low.

대한민국 공개특허공보 제10-2010-0100188호(2010. 09. 15.)Korean Patent Publication No. 10-2010-0100188 (2010. 09. 15.)

본 발명은 플러그인 하이브리드 자동차(Plug??in Hybrid Electric Vehicle)나 전기 자동차(Electric Vehicle)에서 고전압 배터리의 전류를 션트저항을 이용하여 측정할 수 있도록 한 자동차 고전압 배터리의 전류 측정 장치를 제공하는 데에 그 목적이 있다.The present invention provides a current measuring device for an automotive high-voltage battery which can measure the current of a high-voltage battery using a shunt resistor in a plug-in hybrid electric vehicle or an electric vehicle It has its purpose.

본 발명의 일 양상에 따른 자동차 고전압 배터리의 전류 측정 장치는 인쇄회로기판, 션트저항, 전류측정부, 절연전송부, CAN통신부를 포함한다.An apparatus for measuring current of an automotive high-voltage battery according to an aspect of the present invention includes a printed circuit board, a shunt resistor, a current measuring unit, an insulating transfer unit, and a CAN communication unit.

인쇄회로기판은 전기적으로 절연된 중앙의 절연부에 의해 좌우의 저전압부와 고전압부로 나뉜다. 션트저항은 고전압 배터리에 연결된다. 전류측정부는 인쇄회로기판의 고전압부에 배치되고, 션트저항 양단의 전압을 측정하여 고전압 배터리에서 출력되는 전류값을 산출한다. 절연전송부는 고전압부와 저전압부에 걸쳐 배치되되, 고전압부와 저전압부가 전기적으로 절연된 상태에서 서로 전기적 신호를 주고 받게 한다. CAN 통신부는 전류측정부에서 산출된 전류값을 CAN통신을 통해 배터리 제어부로 전송한다.The printed circuit board is divided into left and right low voltage parts and high voltage parts by an electrically insulated central insulation part. The shunt resistor is connected to the high voltage battery. The current measuring unit is disposed in a high voltage portion of the printed circuit board, and measures the voltage across the shunt resistor to calculate a current value output from the high voltage battery. The insulated transfer part is disposed over the high voltage part and the low voltage part, and the high voltage part and the low voltage part are electrically insulated from each other and exchange electrical signals with each other. The CAN communication unit transmits the current value calculated by the current measuring unit to the battery control unit via CAN communication.

본 발명의 다른 양상에 따르면, 자동차 고전압 배터리의 전류 측정 장치는 인쇄회로기판의 고전압부에 배치되고, 고전압부 소정 위치의 전압을 분압 회로를 이용하여 측정하는 전압측정부를 더 포함할 수 있다.According to another aspect of the present invention, an apparatus for measuring the current of an automotive high-voltage battery may further include a voltage measuring unit disposed in a high voltage section of the printed circuit board and measuring a voltage at a predetermined position of the high voltage section using a voltage divider circuit.

본 발명의 또 다른 양상에 따르면, 자동차 고전압 배터리의 전류 측정 장치는 고전압 배터리와 저전압부 접지와의 단락 여부를 검출하는 단락 검출부를 더 포함할 수 있다.According to another aspect of the present invention, an apparatus for measuring a current of an automotive high-voltage battery may further include a short-circuit detection unit for detecting whether a high-voltage battery is short-circuited to a low-voltage unit ground.

본 발명의 또 다른 양상에 따르면, 인쇄회로기판은 4층으로 이루어지되, 2층의 고전압부에서 절연부를 향하여 고전압 접지부가 연장 형성되며, 3층의 저전압부에서 절연부를 향하여 저전압 접지부가 연장 형성되어, 고전압 접지부와 저전압 접지부는 일부가 서로 겹치게 형성된 것일 수 있다.According to another aspect of the present invention, there is provided a printed circuit board comprising four layers, in which a high voltage ground portion extends from a high voltage portion of two layers toward an insulating portion, and a low voltage ground portion is extended from a low voltage portion of three layers toward an insulating portion , And the high-voltage ground unit and the low-voltage ground unit may be formed so that a part thereof overlaps with each other.

본 발명에 따르면, 션트저항을 이용하여 차량용 고전압 배터리의 전류를 측정함으로써 고전압 배터리의 전류 센싱 정밀도를 높일 수 있다.According to the present invention, the current sensing accuracy of a high-voltage battery can be improved by measuring the current of a high-voltage battery for a vehicle using a shunt resistor.

또한, 고전압 배터리와 차량의 일반 전장과의 전기적인 절연 여부를 체크할 수 있다.Also, it is possible to check whether the high voltage battery is electrically insulated from the normal electric field of the vehicle.

도 1은 본 발명의 일 실시예에 따른 차량용 고전압 배터리의 전류 측정 장치의 구성도이다.
도 2는 본 발명의 일 실시예에 따른 인쇄회로기판의 단면도이다.
도 3은 본 발명의 다른 실시예에 따른 차량용 고전압 배터리의 전류 측정 장치의 구성도이다.
도 4는 본 발명의 일 실시예에 따른 단락 검출부의 회로도이다.1 is a configuration diagram of an apparatus for measuring a current of a high voltage battery for a vehicle according to an embodiment of the present invention.
2 is a cross-sectional view of a printed circuit board according to an embodiment of the present invention.
3 is a configuration diagram of an apparatus for measuring a current of a high voltage battery for a vehicle according to another embodiment of the present invention.
4 is a circuit diagram of a short detection unit according to an embodiment of the present invention.

전술한, 그리고 추가적인 양상들은 후술하는 실시 예들을 통해 명확해질 것이다. 본 명세서에서 각 도면의 대응되는 구성 요소들은 동일한 번호로 참조된다. 또한, 구성요소들의 형상이나 크기 등은 실제보다 과장될 수 있다. 그리고 관련된 공지 기술에 대한 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 생각되는 경우 그 공지 기술에 대한 설명은 생략한다.The foregoing and further aspects will become apparent through the following examples. In the present specification, corresponding elements in each figure are referred to by the same numerals. In addition, the shape and size of the components can be exaggerated. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

이하, 본 발명의 다양한 실시 예들을 통해 본 발명을 상세히 설명하기로 한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to various embodiments of the present invention.

도 1은 본 발명의 일 실시예에 따른 차량용 고전압 배터리의 전류 측정 장치의 구성도이다.1 is a configuration diagram of an apparatus for measuring a current of a high voltage battery for a vehicle according to an embodiment of the present invention.

도 1을 참조하여 설명하면, 차량용 고전압 배터리의 전류 측정 장치는 인쇄회로기판(10), 션트저항(20), 전류측정부(30), 절연전송부(40), CAN통신부(50)를 포함할 수 있다.1, a current measuring apparatus for a vehicle high-voltage battery includes a printed circuit board 10, a shunt resistor 20, a current measuring unit 30, an insulating transferring unit 40, and a CAN communication unit 50 can do.

인쇄회로기판(10)은 전기적으로 절연된 중앙의 절연부(12)에 의해 좌우의 저전압부(11)와 고전압부(13)로 나뉠 수 있다. 인쇄회로기판은 일반적인 FR4 기판일 수 있다. 그리고 인쇄회로기판(10)에는 Tin도금이 적용될 수 있다. 고전압부(13)는 아래에서 설명할 션트저항(10)을 통해 차량용 고전압 배터리(13)에 직접 연결되므로 400V이상의 전압이 걸릴 수 있다. 저전압부(11)는 배터리 모니터링 시스템(Battery Monitoring System; BMS)에 연결되어 일반적인 차량의 배터리 전압인 12V를 공급받을 수 있다.The printed circuit board 10 can be divided into left and right low voltage section 11 and high voltage section 13 by an electrically insulated central insulation section 12. The printed circuit board may be a general FR4 substrate. Tin plating may be applied to the printed circuit board 10. Since the high voltage section 13 is directly connected to the vehicle high voltage battery 13 through the shunt resistor 10 to be described below, a voltage of 400 V or more may be applied. The low voltage unit 11 is connected to a battery monitoring system (BMS) and can receive a battery voltage of 12 V, which is a general battery voltage.

션트저항(20)은 고전압 배터리(60)에 연결된다. 션트저항(20)은 구리와 같이 저항이 낮은 양단의 금속 사이에 망간이나 망간 합금 망간 내지 망간 합금(예를 들어, 망간과 구리의 혼합 합금 등)과 같이 온도에 따른 저항 특성의 변화가 작은 금속을 삽입한 것이다.The shunt resistor 20 is connected to the high voltage battery 60. The shunt resistor 20 is a metal having a small change in resistance characteristic depending on temperature such as manganese, manganese alloy manganese or manganese alloy (for example, a mixed alloy of manganese and copper) between metals having low resistance such as copper .

전류측정부(30)는 인쇄회로기판(10)의 고전압부(13)에 배치되고, 션트저항(20) 양단의 전압을 측정하여 고전압 배터리(60)에서 출력되는 전류값을 산출한다. 전류 측정 시 온도에 따른 션트저항(20)의 저항 오차를 보정하여 전류를 정밀하게 측정할 수 있다. 전류측정부(30)는 전류를 정밀하게 측정하기 위해 ADC(Analog digital converter), 마이크로컨트롤러(Micro Controller Unit)를 포함할 수 있다.The current measuring unit 30 is disposed on the high voltage unit 13 of the printed circuit board 10 and measures the voltage across the shunt resistor 20 to calculate a current value output from the high voltage battery 60. [ The current can be precisely measured by correcting the resistance error of the shunt resistor 20 according to the temperature during the current measurement. The current measuring unit 30 may include an analogue digital converter (ADC), a microcontroller unit, or the like to precisely measure the current.

절연전송부(40)는 고전압부(13)와 저전압부(11)에 걸쳐 배치되되, 고전압부(13)와 저전압부(11)가 전기적으로 절연된 상태에서 서로 전기적 신호를 주고 받게 한다. 고전압부(13)에 배치된 전류측정부(30)의 반도체소자들이 동작하기 위해서는 해당 회로소자들에 작동전압이 인가되어야 한다. 일반적인 반도체소자들의 작동전압은 3.3V 내지 5V이므로 고전압부(13)에서 해당 전압을 얻기 위해서는 전압 강하 과정을 거쳐야 한다. 이 경우 회로 구조가 복잡해질 수 있다.The insulation transfer unit 40 is disposed over the high voltage unit 13 and the low voltage unit 11 so that the high voltage unit 13 and the low voltage unit 11 are electrically insulated from each other and exchange electrical signals with each other. In order for semiconductor devices of the current measuring unit 30 disposed in the high voltage unit 13 to operate, an operating voltage must be applied to the corresponding circuit elements. Since the operation voltage of general semiconductor devices is 3.3V to 5V, a voltage drop process is required to obtain the corresponding voltage in the high voltage portion 13. [ In this case, the circuit structure may become complicated.

그런데 저전압부(11)에는 12V이하의 전압이 공급되므로 저전압부(11)로부터 반도체소자들의 작동전압을 끌어오면 간단한 회로구조로 전류측정부(30)를 동작시킬 수 있게 된다. 그러나 이 경우 고전압부(13)와 저전압부(11)가 전기적으로 절연되지 않아 저전압부(11)의 회로소자들이 손상을 입을 수 있다.Since a voltage of 12 V or less is supplied to the low voltage section 11, the current measuring section 30 can be operated with a simple circuit structure by drawing the operating voltage of the semiconductor elements from the low voltage section 11. However, in this case, the high voltage portion 13 and the low voltage portion 11 are not electrically insulated, so that the circuit elements of the low voltage portion 11 may be damaged.

그러나, 본 발명에 따른 차량용 고전압 배터리의 전류 측정 장치는 절연전송부(40)에 의해 고전압부(13)와 저전압부(11)가 전기적으로 절연된 상태에서 서로 전기적 신호를 주고 받으므로 고전압부(13)의 전류에 의해 저전압부(11)의 회로소자들이 손상을 입는 것을 방지할 수 있다. 그리고 저전압부(11)로부터 고전압부(13)에 배치된 반도체소자들의 작동전압을 공급받으므로 회로구조가 간단하게 된다.However, since the high-voltage part 13 and the low-voltage part 11 are electrically insulated from each other by the insulating transfer part 40, the electric current measuring device for measuring the current of the high-voltage battery for a vehicle according to the present invention, It is possible to prevent the circuit elements of the low-voltage section 11 from being damaged by the current of the current source 13. And the operating voltage of the semiconductor elements arranged in the high voltage section 13 is supplied from the low voltage section 11, so that the circuit structure is simplified.

절연전송부(40)는 단일 아이솔레이터(isolator) 회로소자로 이루어질 수도 있고, 복수개의 인코더와 디코더로 이루어진 것일 수도 있으며, 변압기로 이루어질 수도 있다.The insulation transfer unit 40 may be composed of a single isolator circuit element, or may be composed of a plurality of encoders and decoders, or a transformer.

CAN통신부(50)는 전류측정부(40)에서 산출된 전류값을 CAN통신을 통해 BMS에 전송한다. CAN통신부(50)는 CAN 트랜시버를 포함할 수 있다.The CAN communication unit 50 transmits the current value calculated by the current measurement unit 40 to the BMS via the CAN communication. The CAN communication unit 50 may include a CAN transceiver.

이와 같이 구성된 본 발명의 일 실시예에 따른 차량용 고전압 배터리의 전류 측정 장치의 동작을 설명하기로 한다.The operation of the apparatus for measuring current of a high voltage battery for a vehicle according to an embodiment of the present invention will be described.

먼저, 전류측정부(30)가 션트저항(20) 양단의 전압을 측정하고, 고전압 배터리(60)에서 출력되는 전류값을 산출한다. 이 때 션트저항(20)의 온도에 따른 저항오차를 보정하여 전류값을 산출할 수 있다. 전류측정부(30)의 반도체소자들이 동작하기 위한 작동전압은 절연전송부(40)를 통해 저전압부(11)로부터 공급받게 된다. 그리고 전류측정부(30)가 산출한 전류값은 절연전송부(40)를 통해 CAN통신부(50)로 전달된다. CAN통신부(50)는 CAN통신을 통해 전류측정부(30)에서 산출된 전류값을 BMS에 전송한다. BMS는 CAN통신부(50)로부터 전송받은 전류값을 이용하여 고전압 배터리(60)의 상태를 판단하고, 고전압 배터리(60)를 제어하게 된다.First, the current measuring unit 30 measures the voltage across the shunt resistor 20, and calculates the current value output from the high-voltage battery 60. [ At this time, the current value can be calculated by correcting the resistance error according to the temperature of the shunt resistor 20. The operating voltage for operating the semiconductor elements of the current measuring unit 30 is supplied from the low voltage unit 11 through the insulating transfer unit 40. [ The current value calculated by the current measuring unit 30 is transmitted to the CAN communication unit 50 through the insulating transfer unit 40. [ The CAN communication unit 50 transmits the current value calculated by the current measurement unit 30 to the BMS through the CAN communication. The BMS determines the state of the high-voltage battery 60 using the current value received from the CAN communication unit 50, and controls the high-voltage battery 60.

한편, 차량용 고전압 배터리의 전류 측정 장치는 전압측정부(80)를 더 포함할 수 있다.On the other hand, the current measuring device for a high voltage battery for a vehicle may further include a voltage measuring unit 80.

전압측정부(80)는 인쇄회로기판(10)의 고전압부(13)에 배치되어, 고전압부(13) 소정 위치의 전압을 분압 회로를 이용하여 측정한다. 측정 위치는 4곳일 수 있다. 고전압부(13)에는 400V이상의 전압이 걸릴 수 있으므로 고전압부 소정 위치의 전압을 직접 측정하기는 어렵다. 따라서, 분압 회로를 이용하여 전압을 측정 가능한 전압으로 낮춘 다음 각각의 전압을 산출한다.The voltage measuring unit 80 is disposed in the high voltage unit 13 of the printed circuit board 10 and measures a voltage at a predetermined position of the high voltage unit 13 using a voltage dividing circuit. The measurement position may be four. Since a voltage of 400 V or more may be applied to the high voltage section 13, it is difficult to directly measure the voltage at a predetermined position of the high voltage section. Therefore, the voltage is lowered to a measurable voltage using a voltage divider circuit, and then the respective voltages are calculated.

이와 같이 하여 전압측정부(30)가 산출한 전압값은 절연전송부(40)를 통해 CAN통신부(50)로 전달될 수 있다. CAN통신부(50)는 CAN통신을 통해 전압측정부(30)에서 산출된 전압값을 BMS에 전송한다. BMS는 CAN통신부(50)로부터 전송받은 전압값을 이용하여 고전압 배터리(60)의 상태 및 차량용 고전압 배터리의 전류 측정 장치의 정상 동작 여부를 판단하게 된다.The voltage value calculated by the voltage measuring unit 30 can be transmitted to the CAN communication unit 50 through the insulation transfer unit 40. [ The CAN communication unit 50 transmits the voltage value calculated by the voltage measurement unit 30 to the BMS via the CAN communication. The BMS uses the voltage value received from the CAN communication unit 50 to determine the state of the high-voltage battery 60 and the normal operation of the current measuring apparatus of the vehicle high-voltage battery.

도 2는 본 발명의 일 실시예에 따른 인쇄회로기판의 단면도이다.2 is a cross-sectional view of a printed circuit board according to an embodiment of the present invention.

도 2를 참조하여 설명하면, 인쇄회로기판(10)은 4층으로 이루어지되, 2층의 고전압부(13)에서 절연부(12)를 향하여 고전압 접지부(13a)가 연장 형성되며, 3층의 저전압부(11)에서 절연부(12)를 향하여 저전압 접지부(11a)가 연장 형성되어, 고전압 접지부(13a)와 저전압 접지부(11a)는 일부가 서로 겹치게 형성될 수 있다. 이와 같이 고전압 접지부(13a)와 저전압 접지부(11a)가 서로 겹치게 형성되는 경우 EMI(Electromagnetic Interference)가 차폐될 수 있다.2, the printed circuit board 10 has four layers, in which a high-voltage grounding portion 13a is extended from the high-voltage portion 13 of two layers toward the insulating portion 12, Voltage grounding portion 11a is extended from the low-voltage portion 11 to the insulating portion 12 so that the high-voltage grounding portion 13a and the low-voltage grounding portion 11a may be partially overlapped with each other. When the high-voltage grounding part 13a and the low-voltage grounding part 11a are formed to overlap with each other, EMI (electromagnetic interference) can be shielded.

도 3은 본 발명의 다른 실시예에 따른 차량용 고전압 배터리의 전류 측정 장치의 구성도이고, 도 4는 본 발명의 일 실시예에 따른 단락 검출부의 회로도이다.FIG. 3 is a configuration diagram of a current measuring apparatus for a high voltage battery for a vehicle according to another embodiment of the present invention, and FIG. 4 is a circuit diagram of a short detection unit according to an embodiment of the present invention.

도 3 내지 도 4를 참조하여 설명하면, 차량용 고전압 배터리의 전류 측정 장치는 단락 검출부(50)를 더 포함할 수 있다. 단락 검출부(50)는 고전압 배터리(60)와 저전압부 접지(14)와의 단락 여부를 검출한다. 단락 검출부(50)는 고전압부 접지(15), 고전압 배터리(60)와 전기적으로 연결될 수 있다.3 to 4, the apparatus for measuring current of a high voltage battery for a vehicle may further include a short detection unit 50. [ The short detection part 50 detects whether or not the high voltage battery 60 and the low voltage part ground 14 are short-circuited. The short detection portion 50 may be electrically connected to the high voltage ground 15 and the high voltage battery 60.

구체적으로, 단락 검출부(50)는, 도 4에 도시된 것과 같이 두 개의 스위치(SW1, SW2)를 통해 저전압부 접지(14)와 고전압 배터리(60)의 양극 부분, 저전압부 접지(14)와 고전압 배터리(60)의 중간 부분, 저전압부 접지(14)와 고전압 배터리(60)의 음극 부분의 단락 여부를 감지할 수 있다.Specifically, the short-circuit detecting portion 50 is connected to the low-voltage portion ground 14 and the positive portion of the high-voltage battery 60 via the two switches SW1 and SW2, the low-voltage portion ground 14, It is possible to detect the short-circuit of the middle portion of the high-voltage battery 60, the low-voltage portion of the ground 14 and the cathode portion of the high-voltage battery 60. [

SW1을 닫은 상태에서 SW1의 전압을 측정하면, 저전압부 접지(14)와 고전압 배터리(60)의 중간 부분, 저전압부 접지(14)와 고전압 배터리(60)의 음극 부분이 단락된 경우와 그렇지 않은 경우에 측정되는 전압이 다르므로 그 단락 여부를 감지할 수 있다.When the voltage of the switch SW1 is measured while the switch SW1 is closed, the intermediate portion of the low voltage ground 14 and the high voltage battery 60, the case where the low voltage ground 14 and the cathode portion of the high voltage battery 60 are short- Since the measured voltage is different, it is possible to detect the short circuit.

또한, SW2를 닫은 상태에서 SW2의 전압을 측정하면, 저전압부 접지(14)와 고전압 배터리(60)의 양극 부분, 저전압부 접지(14)와 고전압 배터리(60)의 중간 부분이 단락된 경우와 그렇지 않은 경우에 측정되는 전압이 다르므로, 그 단락 여부를 감지할 수 있다.When the voltage of the switch SW2 is measured while the switch SW2 is closed, the case where the low-voltage section ground 14 and the anode section of the high-voltage battery 60, the low-voltage section ground 14 and the middle section of the high- Otherwise, the measured voltage is different, so that it can be detected whether or not there is a short circuit.

위와 같이 차량용 고전압 배터리의 전류 측정 장치는 저전압부 접지(14)와 고전압 배터리(60)의 양극 부분, 저전압부 접지(14)와 고전압 배터리(60)의 중간 부분, 저전압부 접지(14)와 고전압 배터리(60)의 음극 부분의 단락 여부를 감지할 수 있으므로, 차량의 안정성을 향상시킨다.As described above, the apparatus for measuring the current of a high voltage battery for a vehicle includes a low voltage ground 14 and an anode portion of the high voltage battery 60, a middle portion between the low voltage ground 14 and the high voltage battery 60, a low voltage ground 14, It is possible to detect whether the cathode portion of the battery 60 is short-circuited, thereby improving the stability of the vehicle.

본 발명은 첨부된 도면에 도시된 실시예들을 참고로 설명되었으나 이는 예시적인 것에 불과하며, 당해 기술분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 수 있을 것이다. 따라서, 본 발명의 진정한 보호 범위는 첨부된 청구 범위에 의해서만 정해져야 할 것이다. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. There will be. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10: 인쇄회로기판 11: 저전압부
12: 절연부 13: 고전압부
14: 저전압부 접지 15: 고전압부 접지
20: 션트저항 30: 전류측정부
40: 절연전송부 50: CAN통신부
60: 고전압배터리 70: 단락검출부
80: 전압측정부10: printed circuit board 11: low voltage part
12: insulation part 13: high voltage part
14: Low Voltage Ground 15: High Voltage Ground
20: Shunt resistor 30: Current measuring unit
40: Insulation transfer part 50: CAN communication part
60: High-voltage battery 70: Short-circuit detector
80: Voltage measuring unit

Claims (4)

전기적으로 절연된 중앙의 절연부에 의해 좌우의 저전압부와 고전압부로 나뉜 인쇄회로기판;
고전압 배터리에 연결된 션트저항;
상기 인쇄회로기판의 고전압부에 배치되고, 상기 션트저항 양단의 전압을 측정하여 상기 고전압 배터리에서 출력되는 전류값을 산출하는 전류측정부;
상기 고전압부와 저전압부에 걸쳐 배치되되, 상기 고전압부와 저전압부가 전기적으로 절연된 상태에서 서로 전기적 신호를 주고 받게 하는 절연전송부; 및
상기 전류측정부에서 산출된 전류값을 CAN통신을 통해 배터리 제어부로 전송하는 CAN 통신부;
를 포함하며,
상기 인쇄회로기판은 4층으로 이루어지고, 2층의 고전압부에서 절연부를 향하여 고전압 접지부가 연장 형성되며, 3층의 저전압부에서 절연부를 향하여 저전압 접지부가 연장 형성되어, 상기 고전압 접지부와 저전압 접지부는 일부가 서로 겹치게 형성된 것을 특징으로 하는 자동차 고전압 배터리의 전류 측정 장치.
A printed circuit board divided into left and right low voltage parts and high voltage parts by an electrically insulated central insulating part;
A shunt resistor connected to a high voltage battery;
A current measuring unit disposed at a high voltage portion of the printed circuit board and measuring a voltage across the shunt resistor to calculate a current value output from the high voltage battery;
An insulation transfer part disposed over the high voltage part and the low voltage part to exchange electrical signals with each other in a state where the high voltage part and the low voltage part are electrically insulated; And
A CAN communication unit for transmitting the current value calculated by the current measuring unit to the battery control unit via CAN communication;
/ RTI >
Wherein the printed circuit board has four layers, a high-voltage grounding portion extending from the high-voltage portion of the two layers toward the insulating portion, a low-voltage grounding portion extending from the low-voltage portion of the three layers toward the insulating portion, Wherein a part of the first electrode is overlapped with the first electrode.
제1항에 있어서,
상기 인쇄회로기판의 고전압부에 배치되고, 고전압부 소정 위치의 전압을 분압 회로를 이용하여 측정하는 전압측정부를 더 포함하는 것을 특징으로 하는 자동차 고전압 배터리의 전류 측정 장치.
The method according to claim 1,
Further comprising a voltage measuring unit arranged at a high voltage part of the printed circuit board and measuring a voltage at a predetermined position of the high voltage part using a voltage divider circuit.
제1항에 있어서,
고전압 배터리와 저전압부 접지와의 단락 여부를 검출하는 단락 검출부를 더 포함하는 것을 특징으로 하는 자동차 고전압 배터리의 전류 측정 장치.
The method according to claim 1,
Further comprising a short detection unit for detecting whether a high voltage battery and a low voltage ground are short-circuited.
삭제delete
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Cited By (2)

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KR20190101635A (en) * 2018-02-23 2019-09-02 주식회사 엘지화학 Apparatus and method for diagnosing currentsensor
KR20220031148A (en) 2020-09-03 2022-03-11 (주)씨엔아이 Voltage Current Measuring Device for Electric Vehicle Battery

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JP2015203593A (en) 2014-04-11 2015-11-16 日立オートモティブシステムズ株式会社 Battery monitoring device, battery system, and electric vehicle drive device

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Publication number Priority date Publication date Assignee Title
JP2015203593A (en) 2014-04-11 2015-11-16 日立オートモティブシステムズ株式会社 Battery monitoring device, battery system, and electric vehicle drive device

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Publication number Priority date Publication date Assignee Title
KR20190101635A (en) * 2018-02-23 2019-09-02 주식회사 엘지화학 Apparatus and method for diagnosing currentsensor
KR102404816B1 (en) 2018-02-23 2022-05-31 주식회사 엘지에너지솔루션 Apparatus and method for diagnosing currentsensor
KR20220031148A (en) 2020-09-03 2022-03-11 (주)씨엔아이 Voltage Current Measuring Device for Electric Vehicle Battery

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