Charge/discharge protection circuit for a rechargeable battery
PURPOSE: A charge/discharge protection circuit for a rechargeable battery is provided to economically realize the protection circuit in standard sub-micro technology having a low break-down voltage, while requiring little real estate on an IC chip. CONSTITUTION: A charge/discharge protection circuit...
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Main Authors | , , |
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Format | Patent |
Language | English Korean |
Published |
31.07.2002
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Abstract | PURPOSE: A charge/discharge protection circuit for a rechargeable battery is provided to economically realize the protection circuit in standard sub-micro technology having a low break-down voltage, while requiring little real estate on an IC chip. CONSTITUTION: A charge/discharge protection circuit comprises a short-circuit switch(20) coupled in series with a fusible link(2) across the terminals of a rechargeable battery, wherein one end of the fusible link is connected to one of the battery terminals, and the short-circuit switch leads to the guarantied destruction of the fusible link when closed, thereby protecting the rechargeable battery from a dangerous current over-charge, a load current switch having an end coupled to the junction of the fusible link and the short-circuit switch the other end in communication with a first charge/discharge terminal of the protection circuit, wherein the load current switch connects or disconnects the first charge/discharge terminal from the rechargeable battery, a second charge/discharge terminal of the protection circuit coupled to the other end of the battery terminal, and a control logic coupled between the battery terminals and in communication with the first charge/discharge terminal, wherein the control logic protects the battery and the first and the second charge/discharge terminals from over/under-voltage conditions. The control logic opens or closes the load current switch depending on the magnitude of the potential at the first and the second charge/discharge terminals of the protection circuit. The control logic includes an over-voltage detector which closes the short-circuit switch when reaching a predetermined voltage limit which depends on the electric strength of the protection circuit.
본 발명은 가용성 링크(fusible link)에 의해 보호되는 재충전 배터리용 충전/방전 보호 회로에 관한 것이며, 그 재충전 배터리는 배터리 전압, 보호 회로의 충전/방전 단자들 상의 전압 및 충전/방전 전류의 크기에 의존하는 부하 스위치를 개방하거나 닫는 제어 로직을 포함한다. 그 보호 회로는 전기 저항력(electric strength)가 단지 실제의 최대 배터리 전압만을 매칭시키는데 필요하도록 설계되므로, IC 칩 상에 부지(real estate)를 거의 요구하지 않으며, 또한 대부분의 요소들이 집적되도록 한다. |
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AbstractList | PURPOSE: A charge/discharge protection circuit for a rechargeable battery is provided to economically realize the protection circuit in standard sub-micro technology having a low break-down voltage, while requiring little real estate on an IC chip. CONSTITUTION: A charge/discharge protection circuit comprises a short-circuit switch(20) coupled in series with a fusible link(2) across the terminals of a rechargeable battery, wherein one end of the fusible link is connected to one of the battery terminals, and the short-circuit switch leads to the guarantied destruction of the fusible link when closed, thereby protecting the rechargeable battery from a dangerous current over-charge, a load current switch having an end coupled to the junction of the fusible link and the short-circuit switch the other end in communication with a first charge/discharge terminal of the protection circuit, wherein the load current switch connects or disconnects the first charge/discharge terminal from the rechargeable battery, a second charge/discharge terminal of the protection circuit coupled to the other end of the battery terminal, and a control logic coupled between the battery terminals and in communication with the first charge/discharge terminal, wherein the control logic protects the battery and the first and the second charge/discharge terminals from over/under-voltage conditions. The control logic opens or closes the load current switch depending on the magnitude of the potential at the first and the second charge/discharge terminals of the protection circuit. The control logic includes an over-voltage detector which closes the short-circuit switch when reaching a predetermined voltage limit which depends on the electric strength of the protection circuit.
본 발명은 가용성 링크(fusible link)에 의해 보호되는 재충전 배터리용 충전/방전 보호 회로에 관한 것이며, 그 재충전 배터리는 배터리 전압, 보호 회로의 충전/방전 단자들 상의 전압 및 충전/방전 전류의 크기에 의존하는 부하 스위치를 개방하거나 닫는 제어 로직을 포함한다. 그 보호 회로는 전기 저항력(electric strength)가 단지 실제의 최대 배터리 전압만을 매칭시키는데 필요하도록 설계되므로, IC 칩 상에 부지(real estate)를 거의 요구하지 않으며, 또한 대부분의 요소들이 집적되도록 한다. |
Author | PANNWITZ AXEL STELLBERGER ACHIM VONSTAUDT HANS MARTIN |
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DocumentTitleAlternate | 재충전 배터리용 충전/방전 보호 회로 |
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Snippet | PURPOSE: A charge/discharge protection circuit for a rechargeable battery is provided to economically realize the protection circuit in standard sub-micro... |
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SubjectTerms | BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY |
Title | Charge/discharge protection circuit for a rechargeable battery |
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