KR100852175B1 - A battery pack protection circuit for a battery pack - Google Patents

A battery pack protection circuit for a battery pack Download PDF

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Publication number
KR100852175B1
KR100852175B1 KR1020070013104A KR20070013104A KR100852175B1 KR 100852175 B1 KR100852175 B1 KR 100852175B1 KR 1020070013104 A KR1020070013104 A KR 1020070013104A KR 20070013104 A KR20070013104 A KR 20070013104A KR 100852175 B1 KR100852175 B1 KR 100852175B1
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KR
South Korea
Prior art keywords
battery pack
battery
protection circuit
charger
temperature
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KR1020070013104A
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Korean (ko)
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박진수
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넥스콘 테크놀러지 주식회사
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    • 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
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/103—Fuse
    • 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

Abstract

A protection circuit for a battery pack is provided to improve the safety of a battery pack by preventing the firing of a battery pack and the breakage of main components of a protection circuit. A protection circuit for a battery pack comprises a chip set(30) provided with a temperature sensing part(31) which is placed between a battery(10) and a charger(20); a PET(40) for operating the chip set which is placed between them; a thermal breaker(50) for detecting the temperature of the battery which is connected in parallel between a battery and a charger; a protection device(60) for intercepting the current flowing between a battery and a charger which is connected in serial between them; and a second FET(70) for operating the protection device which is connected between them.

Description

배터리팩의 보호회로 {a battery pack protection circuit for a battery pack}Battery pack protection circuit for a battery pack}

도 1은 종래의 배터리팩 보호회로도1 is a conventional battery pack protection circuit diagram

도 2는 본 발명의 한 실시예의 배터리팩 보호회로도2 is a battery pack protection circuit diagram of an embodiment of the present invention.

<도면의 주요 부분에 대한 부호 설명><Description of the symbols for the main parts of the drawings>

10 : 배터리 20 : 충전기10: battery 20: charger

30 : 칩셋 31 : 온도감지부30: chipset 31: temperature sensing unit

40 : FET 50 : 써멀 브레이커40: FET 50: thermal breaker

60 : 보호소자 70 : 제2 FET60: protection element 70: second FET

본 발명은 이동통신기기와 노트북 등의 휴대용 전기통신기기에 주로 사용되는 배터리팩의 보호회로에 관한 것으로, 더 자세하게는 과온도에 의하여 배터리팩 및 보호회로가 파손되는 것을 방지할 수 있도록 한 것에 관한 것이다.The present invention relates to a protection circuit of a battery pack mainly used in mobile telecommunication devices such as mobile communication devices and laptops, and more particularly, to prevent the battery pack and the protection circuit from being damaged by over temperature. will be.

일반적으로 휴대폰을 비롯한 이동통신기기 등에 주로 사용되는 배터리팩은 과온도에 의한 파손이나 발화가 없어야 한다.In general, battery packs mainly used for mobile communication devices such as mobile phones should be free from damage or fire caused by over temperature.

그런데 종래에 있어서는 도 1과 같이 배터리(10')와 충전기(20') 사이에 온도감지부(30')를 갖는 칩셋(30';Chipset)과 FET(40')만을 설치하여 보호회로를 구현하였기 때문에 칩셋(30')의 마련된 온도감지부(31')가 전기적 충격(ESD) 및 기타 외부 충격에 의해 정상적으로 동작하지 않게 되면 배터리팩의 온도가 상승하였을 때에 과온도에 의한 보호기능을 발휘할 수 없게 되어 배터리팩의 파손이나 발화가 야기될 수 있게 되는 문제가 있었다.However, in the related art, as shown in FIG. 1, only a chipset 30 having a temperature sensing unit 30 'and a FET 40' are installed between the battery 10 'and the charger 20' to implement a protection circuit. Therefore, if the temperature sensing unit 31 'of the chipset 30' does not operate normally due to an electric shock (ESD) or other external shock, the battery pack may exhibit a protection function due to over temperature when the temperature of the battery pack rises. There was no problem that the battery pack can be damaged or cause fire.

즉, 종래와 같이 상기 특정의 칩셋(예를 들면 TI사의 칩셋)을 사용한 경우 다른 모든 기능은 정상으로 나타나지만 칩셋(30')의 온도감지부(31')만이 비정상적으로 동작하였을 경우 배터리팩의 외부 요인 또는 내부요인에 의한 과온도가 발생되었을 때에 보호회로 기능이 상실되어 발화가 발생될 우려가 많게 되고, 소자의 발화로 인한 배터리팩의 파손이나 폭발이 유발되는 문제가 있게 된다.That is, when the specific chipset (for example, TI chipset) is used as in the related art, all other functions appear as normal, but only the temperature sensing unit 31 'of the chipset 30' operates abnormally. When over temperature occurs due to factors or internal factors, the protection circuit function may be lost and ignition may occur, and the battery pack may be damaged or exploded due to ignition of the device.

본 발명은 상기와 같은 종래의 문제점을 감안하여 안출한 것이며, 그 목적이 전기적 충격(ESD) 및 기타 외부 충격에 의해 특정 칩셋의 과온도 내장 보호회로가 파손되었을 때 2차적인 과온도 보호회로를 구성함으로써 과온도에 의하여 배터리팩 및 보호회로가 파손되거나 발화되지 않도록 하는 배터리팩의 보호회로를 제공하는 데에 있는 것이다.The present invention has been made in view of the above-described conventional problems, and its object is to provide a secondary over-temperature protection circuit when an over-temperature protection circuit of a specific chipset is damaged by electric shock (ESD) and other external shocks. It is to provide a protection circuit of the battery pack to prevent the battery pack and the protection circuit from being damaged or ignited by over temperature.

본 발명은 상기의 목적을 달성하기 위하여 배터리의 온도를 검출하는 써멀 브레이커(TB; Thermal Breaker)와 전류의 흐름을 차단하는 보호소자(SCP), 그리고 보호소자를 동작시키는 제2 FET를 구비하는 것을 특징으로 하며, 이하 그 구체적인 기술내용을 첨부도면에 의거하여 더욱 자세히 설명하면 다음과 같다.The present invention provides a thermal breaker (TB) for detecting the temperature of the battery, a protection device (SCP) for blocking the flow of current, and a second FET for operating the protection device in order to achieve the above object. The present invention will be described in more detail based on the accompanying drawings.

즉, 도 2에는 본 발명의 한 실시예의 배터리팩의 보호회로 구성도가 도시되어 있는 바, 본 발명의 배터리팩의 보호회로는 배터리(10)와 충전기(20) 사이에 온도감지부(31)가 마련된 칩셋(30) 및 그를 동작시키는 FET(40)가 설치되는 것에 있어서, 상기 배터리(10)와 충전기(20) 사이에 배터리(10)의 온도를 검출하는 써멀 브레이커(50)를 병렬 접속하는 동시에 배터리(10)와 충전기(20) 사이에 흐르는 전류를 차단할 수 있도록 하는 보호소자(60)를 직렬 접속하고, 써멀 브레이커(50)와 보호소자(60) 사이에 보호소자(60)를 동작시키는 제2 FET(70)를 접속하여서 되는 것이다.That is, Figure 2 is a block diagram of the protection circuit of the battery pack of an embodiment of the present invention, the protection circuit of the battery pack of the present invention is the temperature sensing unit 31 between the battery 10 and the charger 20 In the chipset 30 is provided and the FET 40 for operating the same, the thermal breaker 50 for detecting the temperature of the battery 10 between the battery 10 and the charger 20 is connected in parallel At the same time, the protection element 60 is connected in series to cut off the current flowing between the battery 10 and the charger 20, and the protection element 60 is operated between the thermal breaker 50 and the protection element 60. This is done by connecting the second FET 70.

상기와 같이 구성된 본 발명에 있어서 써멀 브레이커(50)는 특정 온도 이상을 감지하게 되는 경우 스위치가 온에서 오프로 절환되는 부품으로 일종의 릴레이와 유사한 기능을 하게 된다.In the present invention configured as described above, when the thermal breaker 50 detects a specific temperature or more, the switch is a part that is switched from on to off, and thus functions similar to a kind of relay.

한편 본 발명에 있어서는 칩셋(30)의 마련된 온도감지부(31)가 전기적 충격(ESD) 및 기타 외부 충격에 의해 정상적으로 동작하지 않게 되더라도 배터리(10)의 온도를 검출하는 써멀 브레이커(50)를 통해 특정 온도 이상을 감지하게 되는 경우 제2 FET(70) 및 보호소자(60)를 통해 전류 흐름을 차단하게 되어 배터리팩의 과도한 온도 상승에 의한 부품 파손이나 발화, 폭발 등을 방지할 수 있게 된다.Meanwhile, in the present invention, even if the temperature sensing unit 31 of the chipset 30 does not operate normally due to an electric shock (ESD) or other external shock, the thermal breaker 50 detects the temperature of the battery 10. When detecting a specific temperature abnormality, the current flow is blocked through the second FET 70 and the protection device 60 to prevent component damage, fire, explosion, etc. due to excessive temperature rise of the battery pack.

이상에서 설명한 바와 같이 본 발명은 과온도를 검출하는 써멀 브레이커(50)와 보호소자(60), 제2 FET(70)를 설치하여 2차적으로 과온도를 검출할 수 있도록 한 것으로, 본 발명에 의하면 칩셋(30)의 마련된 온도감지부(31)가 전기적 충격(ESD) 및 기타 외부 충격에 의해 정상적으로 동작하지 않게 되더라도 과온도 발생시에 써멀 브레이커(50), 보호소자(60), 제2 FET(70)를 통해 전류 흐름을 차단하여 배터리팩의 발화를 방지할 수 있게 될 뿐 아니라 배터리팩 보호회로의 중요 부품의 파손을 방지할 수 있게 되고, 배터리팩 발화로 인한 인명 피해 및 재산 손실을 방지할 수 있게 되며, 배터리팩의 제조공정 중의 불량 제품이 출하되는 것을 방지할 수 있게 되는 등 배터리팩의 안전성과 상품성을 크게 향상시킬 수 있게 되는 등의 효과를 얻을 수 있게 된다.As described above, the present invention provides a thermal breaker 50 for detecting overtemperature, a protection element 60, and a second FET 70 so that the overtemperature can be detected secondarily. According to the present invention, even when the temperature sensing unit 31 of the chipset 30 is not normally operated by an electric shock (ESD) or other external shock, the thermal breaker 50, the protection device 60, and the second FET ( 70) not only prevents the battery pack from igniting by blocking the current flow, but also prevents damage to important parts of the battery pack protection circuit, and prevents personal injury and property loss due to battery pack ignition. It is possible to prevent the defective products from being shipped during the manufacturing process of the battery pack, such as to significantly improve the safety and marketability of the battery pack.

Claims (1)

배터리(10)와 충전기(20) 사이에 온도감지부(31)가 마련된 칩셋(30) 및 그를 동작시키는 FET(40)가 설치되는 것에 있어서, In the case where the chipset 30 provided with the temperature sensing unit 31 and the FET 40 for operating the same are installed between the battery 10 and the charger 20. 상기 배터리(10)와 충전기(20) 사이에 배터리(10)의 온도를 검출하는 써멀 브레이커(50)를 병렬 접속하는 동시에 배터리(10)와 충전기(20) 사이에 흐르는 전류를 차단할 수 있도록 하는 보호소자(60)를 직렬 접속하고, 써멀 브레이커(50)와 보호소자(60) 사이에 보호소자(60)를 동작시키는 제2 FET(70)를 접속한 것을 특징으로 하는 배터리팩의 보호회로.A protection for blocking the current flowing between the battery 10 and the charger 20 while parallel connection of the thermal breaker 50 for detecting the temperature of the battery 10 between the battery 10 and the charger 20 in parallel. And a second FET (70) for operating the protection device (60) between the thermal breaker (50) and the protection device (60).
KR1020070013104A 2007-02-08 2007-02-08 A battery pack protection circuit for a battery pack KR100852175B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101050332B1 (en) * 2010-10-05 2011-07-19 유정석 A battery inserting apparatus for mobile phone and using method of mobile phone using the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980021547A (en) * 1996-09-17 1998-06-25 김광호 Battery pack with battery protection

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980021547A (en) * 1996-09-17 1998-06-25 김광호 Battery pack with battery protection

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
공개특허공보 특1998-021547 A

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101050332B1 (en) * 2010-10-05 2011-07-19 유정석 A battery inserting apparatus for mobile phone and using method of mobile phone using the same

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