KR20080054077A - A pack volt sensing circuit using isolation amplifier for a hybrid electric vehicle and the sensing method thereof - Google Patents

A pack volt sensing circuit using isolation amplifier for a hybrid electric vehicle and the sensing method thereof Download PDF

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KR20080054077A
KR20080054077A KR1020060126206A KR20060126206A KR20080054077A KR 20080054077 A KR20080054077 A KR 20080054077A KR 1020060126206 A KR1020060126206 A KR 1020060126206A KR 20060126206 A KR20060126206 A KR 20060126206A KR 20080054077 A KR20080054077 A KR 20080054077A
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pack voltage
active filter
pack
voltage signal
frequency noise
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KR100860712B1 (en
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강희선
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넥스콘 테크놀러지 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2250/00—Driver interactions
    • B60L2250/16—Driver interactions by display
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/92—Hybrid vehicles
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

A circuit and a method of sensing a battery pack voltage for a hybrid electric vehicle using an isolation amplifier are provided to remarkably improve reliability for a measured voltage by removing high-frequency noise of a primary-side pack voltage signal to transmit the noise to a secondary side and by removing high-frequency noise of a secondary-side pack voltage signal to transmit the noise to a BMS(Battery Management System) board. A circuit(20) of sensing a battery pack voltage for a hybrid electric vehicle using an isolation amplifier includes a primary-side secondary active filter(21), an isolation amplifier(22), a differential amplifier(23), and a secondary-side active filter(24). The primary-side secondary active filter removes high-frequency noise to transmit the noise to the isolation amplifier when a pack voltage divided by a resistor in a battery pack(10). The isolation amplifier amplifies the pack voltage applied to the primary-side secondary active filter to transmit the pack voltage to the secondary-side differential amplifier. The differential amplifier recoveries a secondary-side pack voltage signal to transmit the pack voltage signal to the secondary-side secondary active filter. The secondary-side secondary active filter removes high-frequency noise of the pack voltage signal applied from the differential amplifier to transmit the noise to the BMS board(30).

Description

하이브리드 전기자동차의 배터리 팩 전압 측정회로 및 측정방법{a Pack Volt Sensing Circuit using Isolation Amplifier for a Hybrid Electric Vehicle and the sensing method thereof}{A Pack Volt Sensing Circuit using Isolation Amplifier for a Hybrid Electric Vehicle and the sensing method}

도 1은 본 발명의 한 실시예의 배터리팩 전압 측정 회로도1 is a circuit diagram of a battery pack voltage measurement of an embodiment of the present invention

도 2는 본 발명의 한 실시예의 작동 흐름도2 is a flow chart of operation of one embodiment of the present invention;

< 도면의 주요 부분에 대한 부호 설명 ><Explanation of Signs of Major Parts of Drawings>

10 : 배터리 팩 20 : 배터리 팩 전압 측정회로10: battery pack 20: battery pack voltage measurement circuit

21 : 1차측 2차능동필터 22 : 절연증폭기21: primary side secondary active filter 22: insulation amplifier

23 : 차동증폭기 24 : 2차측 2차능동필터23 differential amplifier 24 secondary side secondary active filter

30 : BMS 보드30: BMS board

본 발명은 내연기관의 엔진과 배터리의 전원을 이용한 모터를 동력원으로 사 용하는 하이브리드 전기자동차(HEV; Hybrid Electric Vehicle)용 배터리 팩 전압 측정회로 및 측정방법에 관한 것으로, 더 자세하게는 절연증폭기(Isolation Amplifier) 및 2차능동필터 등을 이용하여 팩 전압을 측정할 수 있도록 한 것에 관한 것이다.The present invention relates to a battery pack voltage measuring circuit and a measuring method for a hybrid electric vehicle (HEV) using a motor using an engine of an internal combustion engine and a power source of a battery, and more specifically, an insulation amplifier (Isolation) The present invention relates to a pack voltage measurement using an amplifier and a secondary active filter.

일반적으로 하이브리드 전기자동차(HEV)에서 배터리의 팩 전압(Pack Volt)을 측정할 때는 배터리 팩의 팩 전압 측(1차측)의 전압신호를 배터리 관리 시스템(BMS;Battery Management System)의 팩 전압 측정회로(2차측)와 절연(Isolation)시켜 차체의 GND와 분리함으로써 차량에서의 전기적 오동작과 안전사고를 방지할 수 있도록 하며, 팩 전압을 안전하게 측정하기 위해서는 절연회로를 필요로 한다.In general, when measuring the pack voltage of a battery in a hybrid electric vehicle (HEV), the voltage signal of the pack voltage side (primary side) of the battery pack is converted into a pack voltage measurement circuit of a battery management system (BMS). Isolation (secondary side) from the GND of the vehicle body to prevent electrical malfunction and safety accidents in the vehicle, and an insulation circuit is required to measure the pack voltage safely.

종래에 있어서 하이브리드 전기 자동차(HEV; Hybrid Electric Vehicle)에 사용되고 있는 배터리의 팩 전압 측정방법은 1차측에 전류를 흘려줌으로써 발생되는 자기장을 2차측에서 기전력으로 변환하여 발생되는 전압을 측정하는 홀 효과(Hall Effect)를 이용한 방법과; 1차측에 걸리는 전압을 주파수로 변환하여 2차측에 펄스 트랜스를 이용하여 전달하고, 전달된 주파수를 전압으로 변환하여 측정하는 펄스 트랜스를 이용한 방법이 주로 사용되고 있다.Conventionally, the pack voltage measurement method of a battery used in a hybrid electric vehicle (HEV) is a Hall effect (measured by converting a magnetic field generated by flowing a current to a primary side to an electromotive force on a secondary side). Hall Effect); A method using a pulse transformer for converting a voltage applied to the primary side into a frequency and transferring the pulse to a secondary side using a pulse transformer, and converting the measured frequency into a voltage and measuring the voltage is mainly used.

그러나 종래에 있어서 상기 두 가지 방법을 구현한 회로는 다음과 같은 여러 가지 단점을 가지고 있으므로, 배터리 팩 전압 측정회로에 적용하는 데에 어려움이 많았다.However, in the related art, since the circuits implementing the two methods have various disadvantages as described below, it is difficult to apply them to the battery pack voltage measuring circuit.

즉, 홀 효과(Hall Effect)를 이용한 배터리 팩 전압 측정회로는 부피가 크고 회로가 복잡할 뿐 아니라 일정 전류가 계속 소모되어 에너지가 낭비되고, 가격이 비싼 단점이 있다.In other words, the battery pack voltage measuring circuit using the Hall Effect is bulky and complicated, and a constant current is continuously consumed to waste energy and cost.

또한 펄스 트랜스를 이용한 배터리 팩 전압 측정회로는 회로가 복잡할 뿐 아니라 고주파 노이즈를 발생시키고, 가격이 비싼 단점이 있다.In addition, the battery pack voltage measurement circuit using a pulse transformer has a disadvantage that the circuit is complicated, generates high frequency noise, and is expensive.

본 발명은 상기 종래의 실정을 감안하여 안출한 것이며, 그 목적이 하이브리드 전기자동차 배터리 팩의 전압을 간편하게 측정할 수 있도록 하는 하이브리드 전기자동차의 배터리 팩 전압 측정회로 및 측정방법을 제공하는 데에 있는 것이다.The present invention has been made in view of the above-mentioned conventional situation, and an object thereof is to provide a battery pack voltage measuring circuit and a measuring method of a hybrid electric vehicle for easily measuring the voltage of the hybrid electric vehicle battery pack. .

본 발명은 상기의 목적을 달성하기 위하여 1차측 팩 전압 신호의 고주파 노이즈를 제거할 수 있도록 하는 1차측 2차능동필터와 절연증폭기, 차동증폭기, 2차측 팩 전압 신호의 고주파 노이즈를 제거할 수 있도록 하는 2차측 2차능동필터로 이루어지는 배터리 팩 전압 측정회로를 통하여 BMS 보드에 측정 신호를 전달할 수 있도록 하는 것을 특징으로 하며, 이하 그 구체적인 기술내용을 첨부도면에 의거하여 더욱 자세히 설명하면 다음과 같다.The present invention to remove the high-frequency noise of the primary side secondary active filter and the insulation amplifier, differential amplifier, secondary side pack voltage signal to remove the high frequency noise of the primary side pack voltage signal to achieve the above object. It is characterized in that the measurement signal to the BMS board can be transmitted through the battery pack voltage measurement circuit consisting of a secondary side secondary active filter, which will be described in more detail based on the accompanying drawings.

즉, 도 1에는 본 발명의 한 실시예의 배터리팩 전압 측정 회로도가 도시되어 있는 바, 본 발명의 하이브리드 전기자동차의 배터리 팩 전압 측정회로(20)는 That is, Figure 1 shows a battery pack voltage measurement circuit diagram of an embodiment of the present invention, the battery pack voltage measurement circuit 20 of the hybrid electric vehicle of the present invention is

배터리 팩(10)에서 저항으로 전압분배된 팩 전압이 인가되면 고주파 노이즈를 제거하여 절연증폭기(22)에 전달하는 1차측 2차능동필터(21);A primary side secondary active filter 21 which removes high frequency noise and transmits the high frequency noise to the insulation amplifier 22 when the voltage of the battery voltage divided by the resistor is applied to the battery pack 10;

상기 1차측 2차능동필터(21)를 통해 인가된 팩 전압을 절연 증폭하여 2차측 차동증폭기(23)로 전달하는 절연증폭기(22);An insulation amplifier 22 which amplifies the pack voltage applied through the primary side secondary active filter 21 and transmits the pack voltage to the secondary side differential amplifier 23;

상기 절연증폭기(22)에서 전달된 2차측 팩 전압 신호를 전압신호 복원하여 2차측 2차능동필터(24)로 전달하는 차동증폭기(23);A differential amplifier (23) for restoring the secondary pack voltage signal transmitted from the insulation amplifier (22) to a secondary side secondary active filter (24) by restoring the voltage signal;

상기 차동증폭기(23)로부터 인가되는 팩 전압 신호의 고주파 노이즈를 제거하여 BMS 보드(30)로 전달하는 2차측 2차능동필터(24);를 구비하여서 되는 것이다.And a secondary side secondary active filter 24 which removes high frequency noise of the pack voltage signal applied from the differential amplifier 23 and transmits the high frequency noise to the BMS board 30.

본 발명의 하이브리드 전기자동차의 배터리 팩 전압 측정회로(20)에 있어서 배터리 팩(10;HEV_Pack)에서 팩 전압을 저항으로 전압분배를 하여 절연 팩 전압 측정회로(20)의 1차측 2차능동필터(21)에 인가하여 주면 고주파 노이즈를 제거하여 절연증폭기(22)의 입력단에 입력되고, 1차측의 전압은 2차측으로 절연 증폭하여 전달된다.In the battery pack voltage measuring circuit 20 of the hybrid electric vehicle of the present invention, the battery pack 10 (HEV_Pack) divides the voltage of the pack voltage by a resistor and the secondary side active filter of the primary side of the insulation pack voltage measuring circuit 20 ( 21 is applied to the input terminal of the insulation amplifier 22 by removing the high frequency noise, the voltage of the primary side is amplified and transmitted to the secondary side.

상기 절연증폭기(22)에서 전달된 2차측 팩 전압 신호는 차동증폭기(23)를 통하여 2차측 2차능동필터(24)로 신호가 전달되고, 2차측 2차능동필터(24)를 거치면서 고주파 노이즈를 제거하여 BMS 보드(30)로 전달되며, BMS 보드(30)에서 A/D변환을 하여 배터리의 팩 전압을 측정할 수 있게 된다.The secondary pack voltage signal transmitted from the insulation amplifier 22 is transmitted to the secondary side secondary active filter 24 through the differential amplifier 23, and passes through the secondary side secondary active filter 24. The noise is removed and transferred to the BMS board 30, and the A / D conversion is performed on the BMS board 30 to measure the pack voltage of the battery.

한편 도 2에는 본 발명의 한 실시예의 작동흐름도가 도시되어 있는 바, 본 발명의 하이브리드 전기자동차용 배터리 팩 전압 측정방법은Meanwhile, FIG. 2 shows an operating flowchart of an embodiment of the present invention, wherein the method for measuring a battery pack voltage for a hybrid electric vehicle according to the present invention is shown in FIG.

배터리 팩(10)에서 저항으로 전압분배된 팩 전압의 고주파 노이즈를 제거하는 1차측 2차능동필터(21); 상기 1차측 2차능동필터(21)를 통해 인가된 팩 전압을 절연 증폭하는 절연증폭기(22); 상기 절연증폭기(22)에서 전달된 2차측 팩 전압 신 호를 전압신호 복원하는 차동증폭기(23); 상기 차동증폭기(23)로부터 인가되는 팩 전압 신호의 고주파 노이즈를 제거하는 2차측 2차능동필터(24);를 구비하는 배터리 팩 전압 측정회로(20)를 구비하되,A primary side secondary active filter 21 for removing high frequency noise of the pack voltage divided by the resistance in the battery pack 10; An insulation amplifier 22 which amplifies the pack voltage applied through the primary side secondary active filter 21; A differential amplifier (23) for restoring a voltage signal of the secondary side pack voltage signal transmitted from the insulation amplifier (22); And a secondary battery secondary active filter (24) for removing high frequency noise of the pack voltage signal applied from the differential amplifier (23);

배터리 팩(HEV_Pack) 전압을 저항으로 전압분배하는 단계;Dividing a voltage of the battery pack HEV_Pack by a resistor;

상기 배터리 팩 전압 측정회로(20)의 1차측 2차능동필터(21)를 이용하여 고주파 노이즈를 제거하는 단계;Removing high frequency noise using a primary secondary active filter (21) of the battery pack voltage measurement circuit (20);

절연증폭기(22)를 이용하여 1차측 팩 전압신호를 2차측으로 전달하는 단계;Transferring the primary side pack voltage signal to the secondary side using the insulation amplifier 22;

2차측으로 전달된 팩 전압신호를 차동증폭기(23)로 전압신호 복원하는 단계;Restoring the voltage signal to the differential amplifier 23 by the pack voltage signal transferred to the secondary side;

복원된 팩 전압신호를 2차능동필터(24)를 이용하여 고주파 노이즈를 제거하는 단계;Removing the high frequency noise from the restored pack voltage signal using the secondary active filter 24;

BMS 보드(30)의 A/D변환부에서 팩 전압을 A/D 변환하는 단계;A / D conversion of the pack voltage in the A / D converter of the BMS board 30;

디지털로 변환된 팩 전압을 표시하는 단계;로 이루어진 것이다.Displaying the pack voltage converted to digital.

이처럼 본 발명은 1차측인 배터리 팩(10)의 팩 전압 측(1차측)의 전압신호를 2차측인 배터리 관리 시스템(30)을 팩 전압 측정회로(20)로 절연(Isolation)시켜 차체의 GND와 분리함으로써 차량에서의 전기적 오동작과 안전사고를 방지할 수 있게 된다.As described above, the present invention isolates the voltage signal of the pack voltage side (primary side) of the battery pack 10 on the primary side by isolating the battery management system 30 on the secondary side with the pack voltage measurement circuit 20 so as to isolate the GND of the vehicle body. By separating from and, it is possible to prevent electrical malfunction and safety accidents in the vehicle.

이상에서 설명한 바와 같이 본 발명은 하이브리드 전기자동차의 배터리 팩 전압을 측정하는데 있어 1차측과 2차측을 절연할 수 있게 되는 것으로, 본 발명에 의하면 보다 적은 수의 부품으로 간편하고도 저렴하게 구성할 수 있게 되어 회로의 간소화와 원가절감을 도모할 수 있게 되며, 오동작의 우려 없이 안정적으로 운용할 수 있게 되는 등의 효과를 얻을 수 있게 된다.As described above, the present invention enables the primary side and the secondary side to be insulated from each other in measuring the battery pack voltage of the hybrid electric vehicle, and according to the present invention, the present invention can be easily and inexpensively configured with fewer components. As a result, the circuit can be simplified and the cost can be reduced, and stable operation can be achieved without the risk of malfunction.

아울러 본 발명에 있어서는 1차측 팩 전압 신호의 고주파 노이즈를 제거하여 2차측에 전달하고, 2차측 팩 전압 신호의 고주파 노이즈를 제거하여 BMS 보드로 전달함으로써 측정 전압값에 대한 신뢰성을 크게 향상시킬 수 있게 되는 등의 효과를 얻을 수 있게 된다.In addition, in the present invention, the high frequency noise of the primary side pack voltage signal is removed and transmitted to the secondary side, and the high frequency noise of the secondary side pack voltage signal is removed and transmitted to the BMS board so that the reliability of the measured voltage value can be greatly improved. It is possible to obtain such effects as.

Claims (2)

배터리 팩(10)에서 저항으로 전압분배된 팩 전압이 인가되면 고주파 노이즈를 제거하여 절연증폭기(22)에 전달하는 1차측 2차능동필터(21);A primary side secondary active filter 21 which removes high frequency noise and transmits the high frequency noise to the insulation amplifier 22 when the voltage of the battery voltage divided by the resistor is applied to the battery pack 10; 상기 1차측 2차능동필터(21)를 통해 인가된 팩 전압을 절연 증폭하여 2차측 차동증폭기(23)로 전달하는 절연증폭기(22);An insulation amplifier 22 which amplifies the pack voltage applied through the primary side secondary active filter 21 and transmits the pack voltage to the secondary side differential amplifier 23; 상기 절연증폭기(22)에서 전달된 2차측 팩 전압 신호를 전압신호 복원하여 2차측 2차능동필터(24)로 전달하는 차동증폭기(23);A differential amplifier (23) for restoring the secondary pack voltage signal transmitted from the insulation amplifier (22) to a secondary side secondary active filter (24) by restoring the voltage signal; 상기 차동증폭기(23)로부터 인가되는 팩 전압 신호의 고주파 노이즈를 제거하여 BMS 보드(30)로 전달하는 2차측 2차능동필터(24);를 구비하는 것을 특징으로 하는 하이브리드 전기자동차의 배터리 팩 전압 측정회로.And a secondary side secondary active filter 24 for removing high frequency noise of the pack voltage signal applied from the differential amplifier 23 and transmitting the same to the BMS board 30. Measuring circuit. 배터리 팩(10)에서 저항으로 전압분배된 팩 전압의 고주파 노이즈를 제거하는 1차측 2차능동필터(21); 상기 1차측 2차능동필터(21)를 통해 인가된 팩 전압을 절연 증폭하는 절연증폭기(22); 상기 절연증폭기(22)에서 전달된 2차측 팩 전압 신호를 전압신호 복원하는 차동증폭기(23); 상기 차동증폭기(23)로부터 인가되는 팩 전압 신호의 고주파 노이즈를 제거하는 2차측 2차능동필터(24);를 구비하는 배터리 팩 전압 측정회로(20)를 구비하는 것에 있어서,A primary side secondary active filter 21 for removing high frequency noise of the pack voltage divided by the resistance in the battery pack 10; An insulation amplifier 22 which amplifies the pack voltage applied through the primary side secondary active filter 21; A differential amplifier (23) for restoring a voltage signal of the secondary pack voltage signal transmitted from the insulation amplifier (22); In the battery pack voltage measuring circuit 20 comprising: a secondary side secondary active filter 24 for removing high frequency noise of the pack voltage signal applied from the differential amplifier 23, 배터리 팩(10)의 전압을 저항으로 전압분배하는 단계;Dividing the voltage of the battery pack 10 with a resistor; 상기 배터리 팩 전압 측정회로(20)의 1차측 2차능동필터(21)를 이용하여 고주파 노이즈를 제거하는 단계;Removing high frequency noise using a primary secondary active filter (21) of the battery pack voltage measurement circuit (20); 절연증폭기(22)를 이용하여 1차측 팩 전압신호를 2차측으로 전달하는 단계;Transferring the primary side pack voltage signal to the secondary side using the insulation amplifier 22; 2차측으로 전달된 팩 전압신호를 차동증폭기(23)로 전압신호 복원하는 단계;Restoring the voltage signal to the differential amplifier 23 by the pack voltage signal transferred to the secondary side; 복원된 팩 전압신호를 2차능동필터(24)를 이용하여 고주파 노이즈를 제거하는 단계;Removing the high frequency noise from the restored pack voltage signal using the secondary active filter 24; BMS 보드(30)의 A/D변환부에서 팩 전압을 A/D 변환하는 단계;A / D conversion of the pack voltage in the A / D converter of the BMS board 30; 디지털로 변환된 팩 전압을 표시하는 단계;로 이루어지는 하이브리드 전기자동차용 배터리 팩 전압 측정방법.Displaying the pack voltage converted into a digital; Battery pack voltage measurement method for a hybrid electric vehicle consisting of.
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KR100897121B1 (en) * 2006-12-14 2009-05-14 현대자동차주식회사 Battery voltage measuring circuit
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KR20180019364A (en) * 2016-08-16 2018-02-26 영화테크(주) On Board Charger for Controlling Output Voltage and Charging Method Threrof
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KR101367875B1 (en) * 2011-03-21 2014-02-26 주식회사 엘지화학 Apparatus for controlling connection of battery pack
US8933667B2 (en) 2011-03-21 2015-01-13 Lg Chem, Ltd. Apparatus and method for controlling connection of battery packs
CN104769450B (en) * 2012-11-01 2017-09-19 株式会社Lg化学 Method for the test system of battery pack and for testing the battery pack
KR20180019364A (en) * 2016-08-16 2018-02-26 영화테크(주) On Board Charger for Controlling Output Voltage and Charging Method Threrof
CN109980303A (en) * 2017-12-27 2019-07-05 南京德朔实业有限公司 A kind of battery pack and electric tool combination suitable for electric tool

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