CN202127240U - Overcharging and over-discharging protection circuit of lithium battery - Google Patents
Overcharging and over-discharging protection circuit of lithium battery Download PDFInfo
- 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
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- lithium battery
- circuit module
- charge
- super
- over
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- Expired - Fee Related
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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
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.
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)
| 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 |
-
2011
- 2011-07-04 CN CN2011202309172U patent/CN202127240U/en not_active Expired - Fee Related
Cited By (4)
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |