KR20240053999A - A battery management system that actively senses the number of cells - Google Patents

A battery management system that actively senses the number of cells Download PDF

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KR20240053999A
KR20240053999A KR1020220134218A KR20220134218A KR20240053999A KR 20240053999 A KR20240053999 A KR 20240053999A KR 1020220134218 A KR1020220134218 A KR 1020220134218A KR 20220134218 A KR20220134218 A KR 20220134218A KR 20240053999 A KR20240053999 A KR 20240053999A
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cells
management system
shunt resistor
battery management
actively
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KR1020220134218A
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Korean (ko)
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김상호
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이디에스 주식회사
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    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

본 발명은 셀 개수를 능동적으로 센싱하는 배터리관리시스템에 관한 것으로서, 더욱 상세하게는 셀 밸런싱 회로부에 션트저항을 부가함으로써 션트저항의 전압강하를 감지하여 배터리부를 구성하는 셀 개수를 능동적으로 센싱하는 배터리관리시스템에 관한 것이다.
본 발명에 따른 셀 개수를 능동적으로 센싱하는 배터리관리시스템은 셀 밸런싱 회로부에 션트저항을 추가하고, 컨트롤러에서 션트저항의 전압 강하 여부를 감지하여 스위치를 사용하지 않고 셀 개수를 능동적으로 판단 및 감지할 수 있도록 함으로써 기존의 BMS 보드에 별도의 스위치를 설치하거나, 스위치를 온/오프 셋팅할 필요가 없어 사용이 간편하고 편리하다.The present invention relates to a battery management system that actively senses the number of cells. More specifically, it relates to a battery that actively senses the number of cells constituting the battery section by detecting the voltage drop of the shunt resistor by adding a shunt resistor to the cell balancing circuit section. It's about the management system.
The battery management system that actively senses the number of cells according to the present invention adds a shunt resistor to the cell balancing circuit and detects whether the voltage of the shunt resistor drops in the controller to actively determine and detect the number of cells without using a switch. There is no need to install a separate switch on the existing BMS board or set the switch on/off, making it simple and convenient to use.

Description

셀 개수를 능동적으로 센싱하는 배터리관리시스템{A battery management system that actively senses the number of cells}A battery management system that actively senses the number of cells}

본 발명은 셀 개수를 능동적으로 센싱하는 배터리관리시스템에 관한 것으로서, 더욱 상세하게는 셀 밸런싱 회로부에 션트저항을 부가함으로써 션트저항의 전압강하를 감지하여 배터리부를 구성하는 셀 개수를 능동적으로 센싱하는 배터리관리시스템에 관한 것이다.The present invention relates to a battery management system that actively senses the number of cells. More specifically, it relates to a battery that actively senses the number of cells constituting the battery section by detecting the voltage drop of the shunt resistor by adding a shunt resistor to the cell balancing circuit section. It's about the management system.

기존의 BMS에서는 배터리를 구성하는 셀들의 개수를 일반적으로 BMS 보드에 장착된 스위치를 조작한 후 이를 MCU에서 판별하는 방식이다.In a conventional BMS, the number of cells that make up the battery is generally determined by the MCU after operating a switch mounted on the BMS board.

그러나, 이와 같은 종래의 방식은 미리 셀 갯수만큼 수동으로 스위치를 온/오프해주는 셋팅을 해야하기 때문에 번거로운 단점이 있다.However, this conventional method has the disadvantage of being cumbersome because it requires manual setting of switches on/off in advance for the number of cells.

대한민국 공개특허 10-2019-0083449Republic of Korea Public Patent No. 10-2019-0083449 대한민국 공개특허 10-2020-0119572Republic of Korea Open Patent 10-2020-0119572

본 발명은 상기와 같은 종래의 문제를 해결하기 위한 것으로서, 스위치를 사용하지 않고 셀 개수를 BMS가 능동적으로 판단할 수 있도록 함으로써 기존의 BMS 보드에 별도의 스위치를 설치하거나, 스위치를 온/오프 셋팅할 필요가 없어 사용이 간편하고 편리한 셀 개수를 능동적으로 센싱하는 배터리관리시스템을 제공하는데 그 목적이 있다.The present invention is intended to solve the above-described conventional problems, allowing the BMS to actively determine the number of cells without using a switch, thereby installing a separate switch on the existing BMS board or setting the switch on/off. The purpose is to provide a battery management system that actively senses the number of cells, which is easy and convenient to use because there is no need to do so.

상기와 같은 목적을 달성하기 위한 본 발명에 따른 셀 개수를 능동적으로 센싱하는 배터리관리시스템은 복수의 셀 상호간 전압 차이가 발생할 시 용량이 더 많은 셀들을 방전하여 모든 셀들의 전압을 균일하게 조정하는 위한 수동형 셀 밸런싱 회로부를 구비하며, 상기 셀 밸런싱 회로부는 직렬 연결된 셀들 사이 사이에 일 단이 접속되고 타 단은 컨트롤러에 의해 온오프 제어되는 스위칭소자에 접속되는 션트저항;을 구비하고, 상기 컨트롤러는 상기 션트저항 양단의 전위차를 감지하여 상기 셀 밸런싱 회로부에 접속된 셀들의 개수를 판별하는 것을 특징으로 한다.In order to achieve the above object, the battery management system that actively senses the number of cells according to the present invention is designed to uniformly adjust the voltage of all cells by discharging cells with more capacity when a voltage difference occurs between a plurality of cells. It has a passive cell balancing circuit, wherein the cell balancing circuit has a shunt resistor, one end of which is connected between cells connected in series, and the other end of which is connected to a switching element that is controlled on and off by a controller. It is characterized by detecting the potential difference between both ends of the shunt resistor to determine the number of cells connected to the cell balancing circuit unit.

본 발명에 따른 셀 개수를 능동적으로 센싱하는 배터리관리시스템은 셀 밸런싱 회로부에 션트저항을 추가하고, 컨트롤러에서 션트저항의 전압 강하 여부를 감지하여 스위치를 사용하지 않고 셀 개수를 능동적으로 판단 및 감지할 수 있도록 함으로써 기존의 BMS 보드에 별도의 스위치를 설치하거나, 스위치를 온/오프 셋팅할 필요가 없어 사용이 간편하고 편리하다.The battery management system that actively senses the number of cells according to the present invention adds a shunt resistor to the cell balancing circuit and detects whether the voltage of the shunt resistor drops in the controller to actively determine and detect the number of cells without using a switch. There is no need to install a separate switch on the existing BMS board or set the switch on/off, making it simple and convenient to use.

도 1은 본 발명에 따른 셀 개수를 능동적으로 센싱하는 배터리관리시스템의 셀 밸런싱 회로부를 나타낸 도면.1 is a diagram showing a cell balancing circuit of a battery management system that actively senses the number of cells according to the present invention.

이하, 첨부된 도면을 참조하면서 본 발명의 바람직한 실시 예에 따른 셀 개수를 능동적으로 센싱하는 배터리관리시스템에 대하여 상세하게 설명한다. Hereinafter, a battery management system for actively sensing the number of cells according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

도 1에는 본 발명에 따른 셀 개수를 능동적으로 센싱하는 배터리관리시스템가 도시되어 있다. 도 1을 참조하면, 본 발명에 따른 셀 개수를 능동적으로 센싱하는 배터리관리시스템은 복수의 셀 상호간 전압 차이가 발생할 시 용량이 더 많은 셀들을 방전하여 모든 셀들의 전압을 균일하게 조정하는 위한 수동형 셀 밸런싱 회로부(100)를 구비한다.Figure 1 shows a battery management system that actively senses the number of cells according to the present invention. Referring to Figure 1, the battery management system that actively senses the number of cells according to the present invention is a passive cell for uniformly adjusting the voltage of all cells by discharging cells with more capacity when a voltage difference occurs between a plurality of cells. A balancing circuit unit 100 is provided.

셀 밸런싱 회로부(100)는 복수의 셀(10)들이 직렬로 접속되고, 복수의 셀(10) 사이 사이에는 션트저항(20)의 일 단이 접속된다. 션트저항(20)의 타 단은 셀 밸런싱 회로부(100)를 컨트롤하는 컨트롤러(50)에 의해 온오프제어되는 스위칭소자(30)들 사이에 병렬 접속된다. 스위칭소자(30)는 게이트(31)와 소스(32)와 드레인(33)을 갖는 MOSFET을 적용할 수 있다. 스위칭소자(30)들의 소스(32)와 드레인(33)은 서로 접속되고, 스위칭소자(30)들의 게이트(31)는 컨트롤러(50)에 각각 접속된다. 그리고, 션트저항(10)은 일 측 스위칭소자(30)들의 소스(32)와 드레인(33) 사이에 접속된다. 그리고, 일 측의 션트저항(10)과 타 측의 션트저항(10) 사이에 캐피시터(40)가 병렬접속된다.The cell balancing circuit unit 100 includes a plurality of cells 10 connected in series, and one end of a shunt resistor 20 is connected between the plurality of cells 10. The other end of the shunt resistor 20 is connected in parallel between switching elements 30 that are controlled on and off by the controller 50 that controls the cell balancing circuit unit 100. The switching element 30 may be a MOSFET having a gate 31, a source 32, and a drain 33. The source 32 and drain 33 of the switching elements 30 are connected to each other, and the gates 31 of the switching elements 30 are respectively connected to the controller 50. And, the shunt resistor 10 is connected between the source 32 and drain 33 of the switching elements 30 on one side. And, a capacitor 40 is connected in parallel between the shunt resistor 10 on one side and the shunt resistor 10 on the other side.

컨트롤러(50)는 션트저항(10) 양단의 전위차를 감지하는 전압검출회로(전압증폭기)를 구비하며, 션트저항(10) 양단에서 전압 강하 여부를 검출한다. 컨트롤러(50)는 션트저항(10)에서 전압 강하가 발생하면, 셀(10)이 수동형 셀 밸런싱 회로부(100)에 연결된 것으로 판단하고, 전압 강하가 발생하지 않으면 셀(10)이 연결되지 않은 것으로 판단한다.The controller 50 is equipped with a voltage detection circuit (voltage amplifier) that detects the potential difference between both ends of the shunt resistor 10, and detects whether there is a voltage drop across the shunt resistor 10. If a voltage drop occurs in the shunt resistor 10, the controller 50 determines that the cell 10 is connected to the passive cell balancing circuit unit 100. If no voltage drop occurs, the controller 50 determines that the cell 10 is not connected. judge.

컨트롤러(50)는 셀 밸런싱 회로부(100)를 초기 구동시 매우 짧은 시간동안 셀 밸런싱을 실시하면, 스위칭부(30)가 온되면서 셀(10)과 일 측이 션트저항(10)과 캐패시터(40)와 타 측의 션트저항(10) 사이에 방전루프가 형성되며, 셀(10)에서 전류가 션트저항(10) 측으로 흐르게된다. 컨트롤러(50)는 션트저항(10)을 통과하는 전류에 의해 션트저항(10) 양단에서 전압 강하를 변화를 감지하고, 모든 션트저항에 대한 전압 강하 여부를 감지 및 감지 횟수를 누적하여 셀(10)의 개수를 판별할 수 있다.When the controller 50 performs cell balancing for a very short time when initially driving the cell balancing circuit unit 100, the switching unit 30 is turned on and one side of the cell 10 is connected to the shunt resistor 10 and the capacitor 40. ) and the shunt resistor 10 on the other side, a discharge loop is formed, and current flows from the cell 10 to the shunt resistor 10. The controller 50 detects a change in the voltage drop across the shunt resistor 10 due to the current passing through the shunt resistor 10, detects whether the voltage drops for all shunt resistors, and accumulates the number of detections to determine the cell (10). ) can be determined.

이상에서 설명한 본 발명에 따른 셀 개수를 능동적으로 센싱하는 배터리관리시스템은 첨부된 도면을 참조로 설명하였으나 이는 예시적인 것에 불과하며, 당해 기술분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시 예가 가능하다는 점을 이해할 것이다. The battery management system for actively sensing the number of cells according to the present invention described above has been described with reference to the attached drawings, but this is merely an example, and those skilled in the art will recognize various modifications and equivalents therefrom. It will be appreciated that other embodiments are possible.

따라서, 본 발명의 진정한 기술적 보호의 범위는 첨부된 청구범위의 기술적 사상에 의해서만 정해져야 할 것이다.Therefore, the true scope of technical protection of the present invention should be determined only by the technical spirit of the attached claims.

10 : 셀
20 : 션트저항
30 : 스위칭소자
40 : 캐패시터
50 : 컨트롤러
100 : 셀 밸런싱 회로부10: cell
20: shunt resistance
30: switching element
40: capacitor
50: controller
100: Cell balancing circuit unit

Claims (1)

복수의 셀 상호간 전압 차이가 발생할 시 용량이 더 많은 셀들을 방전하여 모든 셀들의 전압을 균일하게 조정하는 위한 수동형 셀 밸런싱 회로부를 갖는 배터리관리시스템에 있어서,
상기 셀 밸런싱 회로부는 직렬 연결된 셀들 사이 사이에 일 단이 접속되고 타 단은 컨트롤러에 의해 온오프 제어되는 스위칭소자에 접속되는 션트저항;을 구비하고,
상기 컨트롤러는 상기 션트저항 양단의 전위차를 감지하여 상기 셀 밸런싱 회로부에 접속된 셀들의 개수를 판별하는 것을 특징으로 하는 셀 개수를 능동적으로 센싱하는 배터리관리시스템.
In a battery management system having a passive cell balancing circuit to uniformly adjust the voltage of all cells by discharging cells with more capacity when a voltage difference occurs between a plurality of cells,
The cell balancing circuit unit includes a shunt resistor, one end of which is connected between cells connected in series, and the other end of which is connected to a switching element that is controlled on and off by a controller,
A battery management system that actively senses the number of cells, wherein the controller detects a potential difference between both ends of the shunt resistor and determines the number of cells connected to the cell balancing circuit unit.
KR1020220134218A 2022-10-18 2022-10-18 A battery management system that actively senses the number of cells KR20240053999A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190083449A (en) 2018-01-04 2019-07-12 한국전기연구원 Balancing devices for battery management systems
KR20200119572A (en) 2019-04-10 2020-10-20 한국전기연구원 Gate driving circuit for cell balancing circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190083449A (en) 2018-01-04 2019-07-12 한국전기연구원 Balancing devices for battery management systems
KR20200119572A (en) 2019-04-10 2020-10-20 한국전기연구원 Gate driving circuit for cell balancing circuit

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