CN201278018Y - 电池保护信号采集电路 - Google Patents

电池保护信号采集电路 Download PDF

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CN201278018Y
CN201278018Y CNU200820200998XU CN200820200998U CN201278018Y CN 201278018 Y CN201278018 Y CN 201278018Y CN U200820200998X U CNU200820200998X U CN U200820200998XU CN 200820200998 U CN200820200998 U CN 200820200998U CN 201278018 Y CN201278018 Y CN 201278018Y
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battery
signal acquisition
acquisition circuit
battery protection
thermal breaker
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詹佳翰
张男胜
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Foxlink Electronics Dongguan Co Ltd
Cheng Uei Precision Industry Co Ltd
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Foxlink Electronics Dongguan Co Ltd
Cheng Uei Precision Industry Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/005—Circuits arrangements for indicating a predetermined temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
    • G01K7/20—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit
    • G01K7/206—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit in a potentiometer circuit
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect 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
    • H01M10/48—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
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive 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
    • 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)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

本实用新型公开了一种电池保护信号采集电路，其包括一电压输入端及一接地端，在电压输入端和接地端之间串接有至少一热断路器和一分压电阻，热断路器设置在电池附近；在热断路器和分压电阻之间连接有一信号输出端。当电池因过充电或过放电等原因而发热时，热断路器断开，则信号输出端为电池保护主电路提供高电平信号，进而电池保护主电路可关断电池充、放电回路，保护电池。本实用新型电池保护信号采集电路结构简单、占用空间小及成本低。

Description

电池保护信号采集电路
技术领域
本实用新型涉及一种电池组合技术，尤其涉及一种电池保护信号采集电路。
背景技术
因过充电、过放电和过电流等情况往往会严重影响电池的性能与使用寿命，并可能引起爆炸，所以电池一般都设置保护电路以对充、放电状态进行有效监测，并在某些条件下关断充、放电电路。电池保护电路都需要设置信号采集电路，以对电池状态参数进行采集。
请参阅图2，一种现有的电池保护信号采集电路1`用于为电池保护主电路(图中未示)提供电池保护信号。该电池保护信号采集电路1`包括一热敏电阻T1、一热敏电阻T2、一运算放大器U1、一运算放大器U2及一信号输出端Output，热敏电阻T1及热敏电阻T2作为两个信号采集点并分别置于不同的锂电池(图中未示)附近。在锂电池正常工作时，信号输出端Output输出低电平信号。例如，当设置于热敏电阻T1旁的锂电池因过充电或过放电等原因而发热时，热敏电阻T1的电阻增大使热敏电阻T1两端的电压增大，进而运算放大器U1的输出电压增大，从而信号输出端Output输出高电平信号。电池保护主电路接收信号输出端Output输出的高电平信号后可据此关断锂电池充、放电回路，从而保护锂电池。热敏电阻T2的工作原理同上，在此不再赘述。
然而，上述电路结构复杂，而且占用空间大、成本高，不符合电子产品小型化和低成本的要求。
实用新型内容
本实用新型的主要目的是针对上述背景技术存在的缺陷提供一种一种结构简单、占用空间小且成本低的电池保护信号采集电路。
为实现上述目的，本实用新型提供的一种电池保护信号采集电路包括一电压输入端及一接地端，在电压输入端和接地端之间串接有至少一热断路器和一分压电阻，热断路器设置在电池附近；在热断路器和分压电阻之间连接有一信号输出端。
如上所述，本实用新型电池保护信号采集电路的热断路器会因电池过充电或过放电等原因发热而断开，从而信号输出端可为与信号输出端相连的电池保护主电路输出高电平信号，进而电池保护主电路可关断电池充、放电回路，保护电池。本实用新型电池保护信号采集电路结构简单、占用空间小及成本低。
附图说明
图1为本实用新型电池保护信号采集电路一实施例的电路原理图。
图2为现有的电池保护信号采集电路的电路原理图。
图中各电路模块及元件的附图标记说明如下：
[背景技术]
电池保护信号采集电路1`
信号输出端Output           热敏电阻T1、T2
运算放大器U1、U2
[本实用新型]
电池保护信号采集电路1
接地端    GND              电压输入端Vp
信号输出端Output           热断路器  RT1、RT2
具体实施方式
为详细说明本实用新型的技术内容、构造特征、所达成的目的及功效，以下兹例举实施例并配合附图予以详细说明。
请参阅图1，本实用新型电池保护信号采集电路1以对锂电池进行保护为例。电池保护信号采集电路1用于为电池保护主电路(图中未示)提供保护电池信号，信号采集电路1包括串接在一接地端GND和一电压输入端VP之间的一热断路器RT1、一热断路器RT2及一分压电阻R。信号输出端Output连接于分压电阻R与热断路器RT2之间。
在本实施例中，热断路器RT1及热断路器RT2产生断路时的温度分别设定为60摄氏度及70摄氏度，热断路器RT1及热断路器RT2分别设置于不同锂电池(图中未示)附近。热断路器RT1附近的锂电池所处的环境的温度较低，热断路器RT2附近的锂电池所处的环境的温度较高。在锂电池正常工作时，信号输出端Output输出低电平信号。
本实用新型实施时，当设置于热断路器RT1附近的锂电池由于过充电或过放电而温度升高到60摄氏度时，热断路器RT1断路，从而信号输出端Output输出高电平信号。电池保护主电路接收信号输出端Output输出的高电平信号后可据此关断锂电池的充、放电回路，从而保护锂电池。热断路器RT2的工作原理同上，在此不再赘述。
综上所述，当锂电池因过充电或过放电等原因而发热时，本实用新型电池保护信号采集电路的热断路器RT1或热断路器RT2会因电池的高温而断开，从而信号输出端Output可为与信号输出端Output相连的电池保护主电路输出高电平信号，进而电池保护主电路可关断锂电池充、放电回路，保护锂电池。本实用新型电池保护信号采集电路1结构简单、占用空间小及成本低。

Claims (3)

1.一种电池保护信号采集电路，包括一电压输入端、一接地端及一信号输出端，其特征在于：在电压输入端和接地端之间串接有至少一热断路器和一分压电阻，热断路器设置在电池附近；信号输出端连接在热断路器和分压电阻之间。
2.根据权利要求1所述的电池保护信号采集电路，其特征在于：所述分压电阻的一端与所述电压输入端相连，一热断路器的一端与所述接地端相连。
3.根据权利要求1所述的电池保护信号采集电路，其特征在于：所述热断路器有两个，且两热断路器分别用于设置在不同电池附近。
CNU200820200998XU 2008-09-19 2008-09-19 电池保护信号采集电路 Expired - Fee Related CN201278018Y (zh)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102684234A (zh) * 2011-03-08 2012-09-19 南京德朔实业有限公司 直流系统
CN110553747A (zh) * 2019-08-30 2019-12-10 华为技术有限公司 检测电气设备热失控的装置、方法及系统
CN111596213A (zh) * 2019-02-20 2020-08-28 江苏师范大学 电池状态监控专用的电阻膜
CN111600086A (zh) * 2019-02-20 2020-08-28 江苏师范大学 Led应急灯的电池鼓包检测模块
EP3757590A4 (en) * 2019-04-30 2021-05-26 Contemporary Amperex Technology Co., Limited THERMAL RUNNING DETECTION CIRCUIT

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102684234A (zh) * 2011-03-08 2012-09-19 南京德朔实业有限公司 直流系统
CN102684234B (zh) * 2011-03-08 2015-03-11 南京德朔实业有限公司 直流系统
CN111596213A (zh) * 2019-02-20 2020-08-28 江苏师范大学 电池状态监控专用的电阻膜
CN111600086A (zh) * 2019-02-20 2020-08-28 江苏师范大学 Led应急灯的电池鼓包检测模块
CN111600086B (zh) * 2019-02-20 2021-07-20 江苏师范大学 Led应急灯的电池鼓包检测模块
EP3757590A4 (en) * 2019-04-30 2021-05-26 Contemporary Amperex Technology Co., Limited THERMAL RUNNING DETECTION CIRCUIT
CN110553747A (zh) * 2019-08-30 2019-12-10 华为技术有限公司 检测电气设备热失控的装置、方法及系统
WO2021036308A1 (zh) * 2019-08-30 2021-03-04 华为技术有限公司 检测电气设备热失控的装置、方法及系统

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