KR100833963B1 - A dc/dc converter for a energy storage device - Google Patents

A dc/dc converter for a energy storage device Download PDF

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Publication number
KR100833963B1
KR100833963B1 KR1020060126205A KR20060126205A KR100833963B1 KR 100833963 B1 KR100833963 B1 KR 100833963B1 KR 1020060126205 A KR1020060126205 A KR 1020060126205A KR 20060126205 A KR20060126205 A KR 20060126205A KR 100833963 B1 KR100833963 B1 KR 100833963B1
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South Korea
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converter
current
controller
monitors
storage device
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KR1020060126205A
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Korean (ko)
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김진성
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넥스콘 테크놀러지 주식회사
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A DC/DC converter for an energy storage device is provided to minimize sizes of the DC/DC converter and the energy storage device by maintaining uniform output power in charging energy. A DC/DC converter for an energy storage device includes a pair of current monitors(42u,42b), a switching unit(43), and a controller(41). The pair of current monitors is connected to an ultra cap and a battery respectively. The switching unit switches a charge direction. The controller is connected to the current monitors and the switching unit. The DC/DC converter maintains uniform output power in charging energy by connecting voltage monitors(44u,44b) to the ultra cap and the battery, connecting the voltage monitors to the controller, and feedbacking an output current to the controller through the current monitors and the voltage monitors.

Description

에너지 저장장치의 ＤＣ/ＤＣ 컨버터{a DC/DC converter for a energy storage device}DC / DC converter for a energy storage device {a DC / DC converter for a energy storage device}

도 1은 본 발명이 관계하는 에너지 저장장치의 구성 블록도1 is a block diagram illustrating an energy storage device according to the present invention.

도 2는 종래의 DC/DC 컨버터의 구성 회로도2 is a configuration circuit diagram of a conventional DC / DC converter

도 3은 본 발명의 한 실시예의 구성 회로도3 is a configuration circuit diagram of one embodiment of the present invention;

도 4는 본 발명의 작동 흐름도4 is an operational flowchart of the present invention.

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

10 : 울트라 캡 20 : 배터리10: Ultra Cap 20: Battery

30 : 제어장치 40 : DC/DC 컨버터30: controller 40: DC / DC converter

41 : 컨트롤러 42u, 42b : 전류모니터41: controller 42u, 42b: current monitor

43 : 스위칭부 44u, 44b : 전압모니터43: switching unit 44u, 44b: voltage monitor

본 발명은 하이브리드 전기자동차(HEV) 등에서 주로 사용되는 에너지 저장장치의 울트라 캡과 배터리 사이에 설치되어 에너지 충전방향을 스위칭할 수 있도록 하는 DC/DC 컨버터에 관한 것으로, 더 자세하게는 컨트롤러가 출력 정보를 제어할 때에 출력 전류와 출력 전압을 모두 피드백(FEEDBACK) 받도록 하는 것에 의해 출력 전력을 일정하게 유지시킬 수 있도록 한 것에 관한 것이다.The present invention relates to a DC / DC converter installed between an ultracap and a battery of an energy storage device mainly used in a hybrid electric vehicle (HEV) and the like to switch the direction of energy charging. The present invention relates to keeping output power constant by causing feedback of both output current and output voltage during control.

본 발명은 특히 도 1과 같이 울트라 캡(10; ULTRA_CAP)과 배터리(20; BATTERY) 사이에 제어장치(30; EMS)에 의해 제어되는 DC/DC 컨버터(40)가 설치되는 에너지 저장장치에 관계하는 것으로, 이와 같은 에너지 저장장치에 있어서 정방향 동작시에는 DC/DC 컨버터(40)에 입력되는 울트라 캡(10)의 에너지가 배터리(20)에 충전되고, 역방향 동작시에는 DC/DC 컨버터(40)에 입력되는 배터리(20)의 에너지가 울트라 캡(10)에 충전된다.In particular, the present invention relates to an energy storage device in which a DC / DC converter 40 controlled by the control device 30 (EMS) is installed between the ultra cap 10 (ULTRA_CAP) and the battery 20 (BATTERY) as shown in FIG. 1. In this energy storage device, the energy of the ultra cap 10 input to the DC / DC converter 40 is charged in the battery 20 in the forward operation, and the DC / DC converter 40 is charged in the reverse operation. The energy of the battery 20 input to) is charged in the ultra cap 10.

종래에 있어서 상기 DC/DC 컨버터는 도 2와 같이 제어장치(30)에 접속된 컨트롤러(41)가 출력의 정보를 받아 컨트롤할 때 울트라 캡(10)과 배터리(20)에 각각 접속된 전류모니터(42u)(42b)를 통해 출력 전류를 피드백(FEEDBACK) 받아 출력의 전력을 일정하게 유지시키는 전류제어방식을 사용하기 때문에 출력 전압이 낮을 때에 충전되는 전력량이 작아 그 용량을 다 쓰지 못하게 되는 문제가 있었다.In the related art, the DC / DC converter has a current monitor connected to the ultra cap 10 and the battery 20 when the controller 41 connected to the control device 30 receives and controls the output information as shown in FIG. 2. (42u) (42b), the feedback current (FEEDBACK) through the output current control method to maintain the output power is constant, so the amount of power to be charged when the output voltage is low, the problem that the capacity can not be used up there was.

즉, 에너지 저장장치의 DC/DC 컨버터의 정 전류 모드 충전방식은 42V 하이브리드 전기자동차 시스템뿐 만 아니라 기존 산업용에서도 널리 사용되는 방법으로, 일반 건전지 및 배터리에 충전하는 방식으로 일정량의 전류를 컨트롤하여 DC/DC 컨버터가 동작하는 방식이다.In other words, the constant current mode charging method of the DC / DC converter of the energy storage device is widely used not only in the 42V hybrid electric vehicle system but also in the existing industry. This is how the / DC converter works.

상기 정 전류 모드 충전방식은 충전이 서서히 이루어지면서 전압 또한 천천히 올라가기 때문에 전압에 비례하여 DC/DC 컨버터를 통해 비례된 전력이 전달되는데, DC/DC 컨버터는 정격용량을 가지고 있지만 저전압에서 동작할 때는 저전력으로만 전달되므로 DC/DC 컨버터에 들어가는 인덕터의 용량에 따른 효율성은 자연적으로 떨어질 수밖에 없게 된다.(예를 들면 700와트의 전력을 전달할 수 있는 DC/DC 컨버터가 200와트 밖에 전달할 수 없어 효율성이 떨어진다.) In the constant current mode charging method, the charging is gradually performed, and the voltage is also slowly increased, so that the proportional power is transmitted through the DC / DC converter in proportion to the voltage. The DC / DC converter has a rated capacity but when operated at a low voltage Because it is delivered only at low power, the efficiency of the inductor in a DC / DC converter will naturally fall (e.g. a DC / DC converter capable of delivering 700 watts of power can only deliver 200 watts of efficiency). Falls.)

본 발명은 상기 종래의 실정을 감안하여 안출한 것이며, 그 목적이 출력 전력을 일정하게 유지하여 충전시간을 단축할 수 있도록 하고 전력을 효율적으로 사용할 수 있도록 하는 에너지 저장장치의 DC/DC 컨버터를 제공하는 데에 있는 것이다.The present invention has been made in view of the above-described conventional situation, and an object thereof is to provide a DC / DC converter of an energy storage device capable of keeping output power constant to shorten a charging time and efficiently using power. It is to do it.

본 발명은 상기의 목적을 달성하기 위하여 전압모니터와 전류모니터를 컨트롤러에 접속하여 전압이 낮을 때는 전류를 높이고, 전압이 높일 때는 전류를 낮춰 전력을 항상 일정하게 유지시킬 수 있도록 하는 것을 특징으로 하며, 이하 그 구체적인 기술내용을 첨부도면에 의거하여 더욱 자세히 설명하면 다음과 같다.The present invention is characterized in that by connecting the voltage monitor and the current monitor to the controller in order to achieve the above object to increase the current when the voltage is low, and to lower the current when the voltage is high, so that the power can be kept constant at all times. Hereinafter, the specific technical details will be described in more detail with reference to the accompanying drawings.

즉, 도 3에는 본 발명의 한 실시예의 회로도가 도시되어 있는 바, 본 발명은 울트라 캡(10) 및 배터리(20)에 각각 접속되는 한 쌍의 전류모니터(42u)(42b)와, 충전방향을 스위칭하는 스위칭부(43)와, 각 전류모니터(42u)(42b)와 스위칭부(43)가 접속되는 컨트롤러(41)를 구비하는 에너지 충전장치의 DC/DC 컨버터를 구성함에 있어서,
상기 울트라 캡(10) 및 상기 배터리(20)에 각각 전압모니터(44u)(44b)를 접속하고, 상기 각 전압모니터(44u)(44b)를 상기 컨트롤러(41)에 접속하며, 각 전류모니터(42u)(42b) 및 각 전압모니터(44u)(44b)를 통해 출력 전류를 컨트롤러(41)에 피드백하여 에너지 충전시에 항상 일정한 출력 전력을 유지시킬 수 있도록 하여서 되는 것이다.That is, Fig. 3 shows a circuit diagram of an embodiment of the present invention. The present invention includes a pair of current monitors 42u and 42b connected to the ultra cap 10 and the battery 20, respectively, and the charging direction. In the configuration of the DC / DC converter of the energy charging device having a switching unit 43 for switching the current controller 42u and 42b and the controller 41 to which the switching unit 43 is connected,
Voltage monitors 44u and 44b are connected to the ultracap 10 and the battery 20, respectively, and voltage monitors 44u and 44b are connected to the controller 41, respectively. The output current is fed back to the controller 41 through 42u) 42b and the voltage monitors 44u and 44b so that constant output power can be maintained at all times during energy charging.

상기와 같이 구성된 본 발명에 있어서는 울트라 캡(10)의 에너지가 배터리(20)에 충전되는 정방향 충전과정이나 배터리(20)의 에너지가 울트라 캡(10)에 충전되는 역방향 충전과정에서 각 전류모니터(42u)(42b) 및 전압모니터(44u)(44b)로 울트라 캡(10) 및 배터리(20)의 전류와 전압을 모니터하여 컨트롤러(41)에 출력 전력을 피드백하게 되면 컨트롤러(41)에서는 전압이 낮을 때는 전류를 높이고 전압이 높을 때는 전류를 낮춰 항상 일정한 출력 전력을 유지하게 된다.In the present invention configured as described above, each current monitor in a forward charging process in which the energy of the ultra cap 10 is charged in the battery 20 or a reverse charging process in which the energy of the battery 20 is charged in the ultracap 10. 42u) 42b and voltage monitors 44u and 44b monitor the current and voltage of the ultracap 10 and the battery 20 and feed back the output power to the controller 41. At low times, the current is increased; at high voltages, the current is kept constant, always maintaining a constant output power.

따라서 본 발명에 있어서는 정격용량을 가지고 있는 DC/DC 컨버터(40)가 저전압에서 동작할 때나 고전압에서 동작할 때 모두 동일 출력 전력으로 에너지를 전달할 수 있게 되므로 DC/DC 컨버터(40)의 용량을 전압이 낮을 때에도 최대로 사용할 수 있게 되는 등 DC/DC 컨버터(40)에 들어가는 인덕터의 용량에 따른 효율성을 크게 향상시킬 수 있게 됨은 물론 충전시간을 단축할 수 있게 된다.Therefore, in the present invention, when the DC / DC converter 40 having a rated capacity is operated at a low voltage or at a high voltage, energy can be transferred at the same output power so that the capacity of the DC / DC converter 40 is reduced. In this case, the maximum use can be achieved even at a low level, and the efficiency of the inductor entering the DC / DC converter 40 can be greatly improved, as well as the charging time can be shortened.

이상에서와 같이 본 발명은 컨트롤러(41)에 울트라 캡(10) 및 배터리(20)에 각각 접속되는 전압모니터(44u)(44b)를 설치하고, 각 전류모니터(42u)(42b) 및 각 전압모니터(44u)(44b)를 통해 출력 전류를 컨트롤러(41)에 피드백하여 에너지 충전시에 항상 일정한 출력 전력을 유지시킬 수 있도록 한 것으로, 본 발명에 의하면 인덕터 및 DC/DC 컨버터의 용량을 효율적으로 사용할 수 있게 됨은 물론 보다 빠르게 에너지를 충전할 수 있게 되고, DC/DC 컨버터 및 에너지 저장장치의 크기를 최소화할 수 있게 되는 등의 효과를 얻을 수 있게 된다.As described above, according to the present invention, the controller 41 is provided with voltage monitors 44u and 44b connected to the ultra cap 10 and the battery 20, respectively, and each current monitor 42u and 42b and the respective voltages. The output current is fed back to the controller 41 through the monitors 44u and 44b so that constant output power can be maintained at all times during energy charging. According to the present invention, the capacity of the inductor and the DC / DC converter can be efficiently Not only can it be used, it will also be able to charge energy more quickly, and the effect of minimizing the size of the DC / DC converter and energy storage device will be obtained.

Claims (1)

울트라 캡(10) 및 배터리(20)에 각각 접속되는 한 쌍의 전류모니터(42u)(42b)와, 충전방향을 스위칭하는 스위칭부(43)와, 각 전류모니터(42u)(42b)와 스위칭부(43)가 접속되는 컨트롤러(41)를 구비하는 에너지 충전장치의 DC/DC 컨버터를 구성함에 있어서,A pair of current monitors 42u and 42b respectively connected to the ultra cap 10 and the battery 20, a switching unit 43 for switching the charging direction, and switching with each current monitor 42u and 42b. In constructing the DC / DC converter of the energy charging device having the controller 41 to which the unit 43 is connected, 상기 울트라 캡(10) 및 상기 배터리(20)에 각각 전압모니터(44u)(44b)를 접속하고, 상기 각 전압모니터(44u)(44b)를 상기 컨트롤러(41)에 접속하며, 각 전류모니터(42u)(42b) 및 각 전압모니터(44u)(44b)를 통해 출력 전류를 컨트롤러(41)에 피드백하여 에너지 충전시에 항상 일정한 출력 전력을 유지시킬 수 있도록 한 것을 특징으로 하는 에너지 충전장치의 DC/DC 컨버터.Voltage monitors 44u and 44b are connected to the ultracap 10 and the battery 20, respectively, and voltage monitors 44u and 44b are connected to the controller 41, respectively. 42u) 42b and the respective voltage monitors 44u, 44b provide feedback of the output current to the controller 41 to maintain constant output power at all times during energy charging. / DC converter.
KR1020060126205A 2006-12-12 2006-12-12 A dc/dc converter for a energy storage device KR100833963B1 (en)

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KR101243909B1 (en) * 2010-12-16 2013-03-14 삼성에스디아이 주식회사 System for energy storage and control method thereof

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
KR101243909B1 (en) * 2010-12-16 2013-03-14 삼성에스디아이 주식회사 System for energy storage and control method thereof

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