CN105006849A - Intelligent switching-off control system of battery charger - Google Patents
Intelligent switching-off control system of battery charger Download PDFInfo
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- CN105006849A CN105006849A CN201410171895.5A CN201410171895A CN105006849A CN 105006849 A CN105006849 A CN 105006849A CN 201410171895 A CN201410171895 A CN 201410171895A CN 105006849 A CN105006849 A CN 105006849A
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- charger
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides an intelligent switching-off control system of a battery charger, wherein the system is used for fully charging a lithium battery and for automatically switching the output of the charger off when the charger isn't connected to the battery. The system judges a charging state of the battery through detecting a battery charging signal of the charger, and controls the output of the charger to be on and off. The system can recognize the charging state of the charger, and automatically switches the output of the charger off for protection, so that safety of the charger is enhanced, and the effective service life of the lithium battery is prolonged.
Description
Technical field
The present invention relates to battery charger field, particularly a kind of lithium battery charger protective circuit.
Background technology
in recent years along with portable electronic produces the quick increase of device, be also increasing to the demand of lithium battery, be also increasing to the demand of lithium battery charger simultaneously.At present, on market, most lithium battery carries over-charge protective function, and therefore lithium battery charger is not with over-charge protective function mostly; But because on market, lithium battery product is various, over-charge protective overcharges function quality and differs, the fail safe of lithium battery and useful life cannot be guaranteed.The battery charger also having part relatively senior can with over-charge protective function, but be all generally integrate with monolithic processor controlled mode and other defencive function.
Summary of the invention
[0003] the object of the invention is to carry the good and bad situation differed of over-charge protective function by providing a kind of charger overcharge protection circuit to solve lithium battery product.
The present invention is that a kind of battery charger intelligence turns off control system, comprises power module, charger turns off module, battery pack, battery pack charging status feedback module, and described charger turns off module and comprises delay circuit module and switching circuit module; Described delay circuit module, when powering on for charger, in a period of time, no matter whether charger connects battery also can be held normal output; Described switching circuit module, for receiving battery charger charging signals, when charger does not charge or charging signals display battery is full of, turning off charger and exporting.
As the preferred embodiment of patent of the present invention, described delay circuit module comprises charge-discharge circuit module and reference circuit module;
Described charge-discharge circuit module comprises: the first electric capacity, the second electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first triode, the second triode, the first comparator; The first described electric capacity and described second capacitances in series, its non-series connection end connects the first power end and the first power supply ground respectively, the first transistor base described in its series connection end is connected by the first described resistance and the first described comparator end of oppisite phase, described its collector electrode of the first triode is by the second described resistance to the first power end, and its emitter passes through the 3rd described resistance to the first power supply ground; The first described comparator output terminal connects described second transistor base by described 4th resistance, and described its collector electrode of the second triode is connected with described first comparator end of oppisite phase, and its emitter connects the first power supply ground.
Reference circuit module comprises: the first photoelectrical coupler, the first diode, the second diode, the 3rd triode, the 4th triode, the 5th resistance, the 8th resistance, the 9th resistance, the first relay; The first described photoelectrical coupler, its light-emitting diode positive pole passes through the 5th described resistance to the first described comparator output terminal, its light-emitting diode negative pole connects the first power supply ground, the battery-charge signal described in its collector electrode connects, and its emitter connects the first diode cathode; The first described diode cathode passes through the 8th described resistance to the 3rd described transistor base, the 3rd described transistor collector is connected with the 4th described transistor base and rectifies pole and described second diode cathode by the 9th described resistance to the first described Control, arrive second source end again, the 4th described transistor collector is connected with the first described Control end negative pole with the second described diode cathode, and the 3rd described transistor emitter and the 4th described transistor emitter connect second source ground.
Beneficial effect of the present invention is by detecting battery charger charging signals, after charger does not charge or battery is full of electricity, charger is exported and turn off, thus on the one hand effectively prevent lithium cell charging and overcharge, on the other hand charger is not exported when Light Condition, thus make the safer and more energy-conserving and environment-protective of charger.
Accompanying drawing explanation
Accompanying drawing 1 is theory diagram of the present invention;
Accompanying drawing 2 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with Fig. 1,2, the present invention is further described;
A kind of battery charger intelligence of patent of the present invention turns off control system, comprise power module 1, charger turns off module 2, battery pack 3, battery-charge signal feedback module 4, described charger turns off module 2 and comprises delay circuit module 2-1 and breaking circuit module 2-2; Described delay circuit module 2-1, when powering on for charger, in a period of time, no matter whether charger connects battery also can be held normal output; Described breaking circuit module 2-2, for receiving battery charger charging signals, when charger does not charge or charging signals display battery is full of, turning off charger and exporting.Described delay circuit module 2-1 comprises charge-discharge circuit module 2-1-2 and reference circuit module 2-1-1.
be made up of the reference circuit of delay circuit in Fig. 2 resistance R6, resistance R7, by R6 and R7 series connection, then meet the first power end VCC1 and the first power supply ground GND1 respectively, at R6 and R7 series connection place generation reference voltage to the first comparator U1A in-phase end.
By the first electric capacity C1 in Fig. 2, second electric capacity C2, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, first triode Q1, second triode Q2, first comparator U1A forms the charge-discharge circuit of delay circuit, when powering on, VCC1 is charged to C2 by C1, C1 and C2 series connection place is made to obtain a high level, this high level makes Q1 conducting by R1 to Q1 base stage, Q1 and the R2 of conducting, R3 forms a dividing potential drop relation, make Q1 emitter voltage a little less than the high level of C1 and C2 series connection place, therefore high level passes through R1, the base stage of Q1 and emitter, R3 to GND1 forms a discharge process slowly, also make the voltage of Q1 base stage obtain a process slowly declined simultaneously, when Q1 base voltage drops to lower than U1A in-phase end, U1A output exports high level by R4 to Q2 base stage, make Q2 conducting, then the voltage of Q1 base stage is pulled to 0V rapidly, which prevent U1A output recurrent fluctuations between high level and low level when Q1 base stage is discharged to reference voltage (i.e. U1A in-phase end voltage) critical point, terminate to this delay circuit.
Between delay circuit time delay, the light-emitting diode of the first photoelectrical coupler PC1 is in off state always, and therefore the collector electrode of PC1 and emitter are also in off state always, battery-charge signal cannot be passed through, cause relay to be in conducting state always;
At the end of time delay, PC1 LEDs ON, PC1 collector electrode and emitter conducting, (the desirable power supply of battery-charge signal refers to modulating signal to battery-charge signal, when charger is in non-charged state, non-charging indicator light is lighted, and therefrom obtains a high level as the non-charging status signal of battery) arrive the 8th resistance R8 by PC1; When battery-charge signal is high level (being non-charged state), high level causes Q3 conducting by R8, then making the 4th triode Q4 base voltage be pulled to low level makes Q4 turn off, therefore the first relay K 1 turns off, charger output voltage cannot arrive relay OUT by K1 to relay IN place, therefore charger Non voltage output; Otherwise when battery-charge signal is low level (namely charger is charged state), K1 conducting, charger normally exports.
The invention provides a kind of turning off system for lithium battery charger, be applicable to various lithium battery charger, particularly stricter occasion is required to protection service life of lithium battery and need to automatically shut down the occasion that charger exports when non-charged state.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (2)
1. battery charger intelligence turns off a control system, it is characterized in that: comprise power module, charger turns off module, battery pack, battery pack charging status feedback module, and described charger turns off module and comprises delay circuit module and switching circuit module; Described delay circuit, when powering on for charger, in a period of time, no matter whether charger connects battery also can be held normal output; Described breaking circuit, for receiving battery charger charging signals, when charger does not charge or charging signals display battery is full of, turning off charger and exporting.
2. battery charger intelligence as claimed in claim 1 turns off control system, it is characterized in that: described delay circuit module comprises charge-discharge circuit module and reference circuit module;
Described charge-discharge circuit module comprises: the first electric capacity, the second electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first triode, the second triode, the first comparator; The first described electric capacity and described second capacitances in series, its non-series connection end connects the first power end and the first power supply ground respectively, the first transistor base described in its series connection end is connected by the first described resistance and the first described comparator end of oppisite phase, described its collector electrode of the first triode is by the second described resistance to the first power end, and its emitter passes through the 3rd described resistance to the first power supply ground; The first described comparator output terminal connects described second transistor base by described 4th resistance, and described its collector electrode of the second triode is connected with described first comparator end of oppisite phase, and its emitter connects the first power supply ground;
Described reference circuit module comprises: the first photoelectrical coupler, the first diode, the second diode, the 3rd triode, the 4th triode, the 5th resistance, the 8th resistance, the 9th resistance, the first relay; The first described photoelectrical coupler, its light-emitting diode positive pole passes through the 5th described resistance to the first described comparator output terminal, its light-emitting diode negative pole connects the first power supply ground, the battery-charge signal described in its collector electrode connects, and its emitter connects the first diode cathode; The first described diode cathode passes through the 8th described resistance to the 3rd described transistor base, the 3rd described transistor collector is connected with the 4th described transistor base and rectifies pole and described second diode cathode by the 9th described resistance to the first described Control, arrive second source end again, the 4th described transistor collector is connected with the first described Control end negative pole with the second described diode cathode, and the 3rd described transistor emitter and the 4th described transistor emitter connect second source ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410171895.5A CN105006849A (en) | 2014-04-25 | 2014-04-25 | Intelligent switching-off control system of battery charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410171895.5A CN105006849A (en) | 2014-04-25 | 2014-04-25 | Intelligent switching-off control system of battery charger |
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| Publication Number | Publication Date |
|---|---|
| CN105006849A true CN105006849A (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410171895.5A Pending CN105006849A (en) | 2014-04-25 | 2014-04-25 | Intelligent switching-off control system of battery charger |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811491A (en) * | 2014-12-31 | 2016-07-27 | 徐承金 | Intelligent turn-off control system for electronic circuit |
| CN106655309A (en) * | 2015-11-01 | 2017-05-10 | 肖斌 | Novel intelligent charging system |
| CN116418088A (en) * | 2023-04-17 | 2023-07-11 | 基康仪器股份有限公司 | Circuit and device applied to optical fiber |
-
2014
- 2014-04-25 CN CN201410171895.5A patent/CN105006849A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811491A (en) * | 2014-12-31 | 2016-07-27 | 徐承金 | Intelligent turn-off control system for electronic circuit |
| CN106655309A (en) * | 2015-11-01 | 2017-05-10 | 肖斌 | Novel intelligent charging system |
| CN116418088A (en) * | 2023-04-17 | 2023-07-11 | 基康仪器股份有限公司 | Circuit and device applied to optical fiber |
| CN116418088B (en) * | 2023-04-17 | 2024-03-12 | 基康仪器股份有限公司 | Circuit and device applied to optical fiber |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151028 |
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| WD01 | Invention patent application deemed withdrawn after publication |