CN202127240U - Overcharging and over-discharging protection circuit of lithium battery - Google Patents

Overcharging and over-discharging protection circuit of lithium battery Download PDF

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Publication number
CN202127240U
CN202127240U CN2011202309172U CN201120230917U CN202127240U CN 202127240 U CN202127240 U CN 202127240U CN 2011202309172 U CN2011202309172 U CN 2011202309172U CN 201120230917 U CN201120230917 U CN 201120230917U CN 202127240 U CN202127240 U CN 202127240U
Authority
CN
China
Prior art keywords
lithium battery
circuit module
charge
super
over
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011202309172U
Other languages
Chinese (zh)
Inventor
徐滨
张五一
房青
杨根山
刘雷鸣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ANHUI APIG XINHUI OPTOELECTRONIC TECHNOLOGY Co Ltd
Original Assignee
ANHUI APIG XINHUI OPTOELECTRONIC TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ANHUI APIG XINHUI OPTOELECTRONIC TECHNOLOGY Co Ltd filed Critical ANHUI APIG XINHUI OPTOELECTRONIC TECHNOLOGY Co Ltd
Priority to CN2011202309172U priority Critical patent/CN202127240U/en
Application granted granted Critical
Publication of CN202127240U publication Critical patent/CN202127240U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model discloses an overcharging and over-discharging protection circuit of a lithium battery, which comprises a power supply circuit module, a switch circuit module, a lithium battery and a microcontroller microprogrammed control unit (MCU), wherein the power supply circuit module, the switch circuit module, the lithium battery and the microcontroller MCU are electrically connected in sequence. The microcontroller MCU is connected with the switch circuit module, and an over-voltage/over-current/short circuit protection circuit module is connected with the lithium battery. The overcharging and over-discharging protection circuit of the lithium battery is simple in structure and stable in performance, and can control overcharging and over-discharging protection of the lithium battery through the intelligent MCU.

Description

A kind of charging and discharging lithium battery super-charge super-discharge protective circuit
Technical field
The utility model relates to a kind of charging circuit of lithium battery, specifically is a kind of charging and discharging lithium battery super-charge super-discharge protective circuit.
Background technology
Along with development of science and technology, the application of mobile electronic device more and more widely, mobile electronic device generally adopts mobile battery as power supply.Existing mobile battery generally adopts the lithium battery that can charge, and because of it can charge repeatedly, discharge, need not often change, and now also is widely used in the middle of the field of solar energy lamp.But lithium battery is when discharging and recharging; Occur charge capacity easily and be not easy control, can cause positive electrode structural change capacitance loss when overcharging, divide reaction of liberation oxygen and electrolyte vigorous oxidation and then combustion explosion; Cross when putting and to cause the lithium battery decreased performance, the life-span reduction.So in the battery charging and discharging circuit of lithium battery, is provided with and fills over-discharge protection circuit and can effectively improve this problem, but existing charge-discharge protection circuit nearly all exists complex structure, the problem of charge and discharge protecting weak effect.
The utility model content
The technical problem that the utility model will solve provides a kind of charging and discharging lithium battery super-charge super-discharge protective circuit, solves the problem of charging and discharging lithium battery super-charge super-discharge, and simple in structure, and charge and discharge protecting is effective.
The technical scheme of the utility model is:
A kind of charging and discharging lithium battery super-charge super-discharge protective circuit; It comprises charge power supply circuit module, switching circuit module, lithium battery and the microcontroller MCU that connects successively; Described microcontroller MCU is connected with the switching circuit module, is connected with overvoltage/overcurrent/short-circuit protection circuit module on the described lithium battery.
Be connected with cell voltage/current detection circuit module on the described charge power supply circuit module, and cell voltage/current control module is connected with described microcontroller MCU.
Described overvoltage/overcurrent/short-circuit protection circuit module is selected paster fuse for use.
The advantage of the utility model:
(1), lithium battery is connected with microcontroller MCU, and is simple in structure through the control of MCU control charging and discharging lithium battery electric weight, and charge and discharge protecting control is effective;
(2), the overvoltage/overcurrent/short-circuit protection circuit of on lithium battery, connecting; Guaranteed to occur at microcontroller MCU unusual uncontrollable the time, by overvoltage/overcurrent/short-circuit protection circuit module realize lithium battery discharge overcurrent protection, battery cross put protection, overcurrent protection and charging overvoltage protection charge;
(3), the switching circuit module is set between charge power supply circuit module and the lithium battery; And through microcontroller MCU control switch circuit module; Play effect, the phenomenon of avoiding the charge power supply circuit module that overcharging is appearred in lithium battery to the lithium cell charging circuit switching.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model.
Embodiment
See Fig. 1; A kind of charging and discharging lithium battery super-charge super-discharge protective circuit; Comprise charge power supply circuit module 1, switching circuit module 2, lithium battery 3 and the microcontroller MCU 4 that connects successively, cell voltage/current detection circuit module 5 and the overvoltage/overcurrent that is connected with the lithium battery 3/short-circuit protection circuit module 6 that is connected with charge power supply circuit module 1, switching circuit module 2, cell voltage/current control module 5 all are connected with microcontroller MCU 4.
Charge power supply circuit module 1 adopts the constant voltage/constant current circuit, and circuit adopts the PWM switch to control integrated IC, through the BUCK circuit topology, charge power supply is provided for lithium battery 3; Cell voltage/current detection circuit module 5 detects the voltage and current of battery in real time through electric resistance partial pressure and unit sheet A/D change-over circuit; Overvoltage/overcurrent/short-circuit protection circuit module is selected paster fuse for use; When microcontroller MCU4 occur unusual uncontrollable the time, by overvoltage/overcurrent/short-circuit protection circuit module 6 realize lithium batteries 3 discharge overcurrent protections, battery cross put protection, overcurrent protection and charging overvoltage protection charge.
During charging, microcontroller MCU 4 control switch circuit modules 2 play over-charge protective, and during discharge, microcontroller MCU 4 control lithium batteries 3 realized putting protection.
The parameter and the function of charging and discharging lithium battery super-charge super-discharge protective circuit:
During standby, the lithium battery discharging current <22μA
Final discharging voltage 7V
Final discharging voltage (monomer) 3.5V
Maximum discharge current 500mA
The discharge overcurrent protection Paster fuse 2A
Battery is crossed and is put protection Paster fuse 2A
Preliminary filling electric current/termination charging current 50mA
Pre-charge pressure threshold values (monomer) 2.75V
The constant current charge electric current 500mA
Constant voltage charge voltage 8.4V
Constant voltage charge voltage (monomer) 4.2V
Two batteries guarantee the charging consistency Difference < 0.1V
Overshoot protection voltage (monomer) 4.25V
The charging overcurrent protection Paster fuse 2A
Charging overvoltage protection Paster fuse 2A
Over-charge protective The MCU program
Overheat protector 60℃
The external short-circuit of battery protection Paster fuse 2A

Claims (3)

1. charging and discharging lithium battery super-charge super-discharge protective circuit; It is characterized in that: it comprises charge power supply circuit module, switching circuit module, lithium battery and the microcontroller MCU that connects successively; Described microcontroller MCU is connected with the switching circuit module, is connected with overvoltage/overcurrent/short-circuit protection circuit module on the described lithium battery.
2. a kind of charging and discharging lithium battery super-charge super-discharge protective circuit according to claim 1; It is characterized in that: be connected with cell voltage/current detection circuit module on the described charge power supply circuit module, and cell voltage/current control module is connected with described microcontroller MCU.
3. a kind of charging and discharging lithium battery super-charge super-discharge protective circuit according to claim 1, it is characterized in that: described overvoltage/overcurrent/short-circuit protection circuit module is selected paster fuse for use.
CN2011202309172U 2011-07-04 2011-07-04 Overcharging and over-discharging protection circuit of lithium battery Expired - Fee Related CN202127240U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202309172U CN202127240U (en) 2011-07-04 2011-07-04 Overcharging and over-discharging protection circuit of lithium battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011202309172U CN202127240U (en) 2011-07-04 2011-07-04 Overcharging and over-discharging protection circuit of lithium battery

Publications (1)

Publication Number Publication Date
CN202127240U true CN202127240U (en) 2012-01-25

Family

ID=45490302

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011202309172U Expired - Fee Related CN202127240U (en) 2011-07-04 2011-07-04 Overcharging and over-discharging protection circuit of lithium battery

Country Status (1)

Country Link
CN (1) CN202127240U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105978064A (en) * 2016-05-09 2016-09-28 深圳珈伟光伏照明股份有限公司 Self-locking battery over-discharge over-charge protection circuit and lamp
CN108736452A (en) * 2018-05-02 2018-11-02 深圳市欣旺达综合能源服务有限公司 Circuit is protected in the anti-emptying of self-powered of battery energy storage system
CN114053735A (en) * 2021-11-26 2022-02-18 王玲 Electronic falling cannon for children toy

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105978064A (en) * 2016-05-09 2016-09-28 深圳珈伟光伏照明股份有限公司 Self-locking battery over-discharge over-charge protection circuit and lamp
CN105978064B (en) * 2016-05-09 2018-10-16 深圳珈伟光伏照明股份有限公司 A kind of self-locking battery, which is crossed, puts overcharge protection circuit and lamps and lanterns
CN108736452A (en) * 2018-05-02 2018-11-02 深圳市欣旺达综合能源服务有限公司 Circuit is protected in the anti-emptying of self-powered of battery energy storage system
CN114053735A (en) * 2021-11-26 2022-02-18 王玲 Electronic falling cannon for children toy

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120125

Termination date: 20150704

EXPY Termination of patent right or utility model