CN104617645A - Charging circuit - Google Patents
Charging circuit Download PDFInfo
- Publication number
- CN104617645A CN104617645A CN201310539033.9A CN201310539033A CN104617645A CN 104617645 A CN104617645 A CN 104617645A CN 201310539033 A CN201310539033 A CN 201310539033A CN 104617645 A CN104617645 A CN 104617645A
- Authority
- CN
- China
- Prior art keywords
- relay
- control chip
- voltage
- charging
- storage battery
- 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.)
- Pending
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention discloses a charging circuit comprising a voltage conversion circuit, a battery pack, a control chip, and a relay. The voltage conversion circuit is connected with the battery pack. The battery pack is connected with the control chip. The control chip is connected with a control end of the relay. The control chip is used for detecting the output voltage of the battery pack and controlling the port state of the relay according to the output voltage of the battery pack. When a normally closed end of the relay and a common end of the relay are turned on, the voltage conversion circuit charges the battery pack. When a normally open end of the relay and the common end of the relay are turned on, the voltage conversion circuit stops charging the battery pack. Charging to a battery can be stopped when the battery is fully charged, so that the service life and the power maintaining ability of the battery are ensured. Moreover, the charging circuit has the advantages of simple structure and low cost.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of charging circuit.
Background technology
In each electronic product, storage battery is accumulate device the most common.Battery charging circuit designed at present; there is no over-charge protective; user when forget pull out power supply; storage battery is made to continue charging; thus cause overcharging; overcharge the capacity that will reduce storage battery and the solid power reducing storage battery, even cause storage battery deformation or blast, bury potential safety hazard.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of charging circuit, can be implemented in storage battery when being full of electricity, stops charge in batteries, ensures the life-span of storage battery and solid power, has the advantage that structure is simple, cost is low simultaneously.
In order to solve the problems of the technologies described above, embodiments provide a kind of charging circuit, comprise voltage conversion circuit, batteries, control chip and relay, wherein:
Described voltage conversion circuit is connected with described batteries, described batteries is connected with described control chip, described control chip is connected with the control end of described relay, described control chip for detect described storage battery output voltage and according to the output voltage control of described storage battery the port status of relay, during the common port conducting of the normal-closed end of described relay and described relay, described voltage conversion circuit is to described battery charging, during the common port conducting of the Chang Kaiduan of described relay and described relay, described voltage conversion circuit stops to described battery charging.
Implement the embodiment of the present invention, there is following beneficial effect: the embodiment of the present invention is by the output voltage of control chip inspection batteries, and utilize the break-make of Control voltage conversion circuit, thus when storage battery is full of electricity, stop charge in batteries, ensureing the life-span of storage battery and solid power, stopping storage battery because overcharging the potential safety hazard caused.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of charging circuit that the embodiment of the present invention provides;
Fig. 2 is the circuit theory diagrams of a kind of charging circuit that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
A kind of charging circuit that the embodiment of the present invention provides, can be placed in charger, also can be built in electronic product.
Fig. 1 is the structural representation of a kind of charging circuit in the embodiment of the present invention.Charging circuit as shown in the figure in the embodiment of the present invention at least can comprise voltage conversion circuit 110, batteries 120, control chip 130 and relay 140, wherein:
Voltage conversion circuit 110 is connected with batteries 120, batteries 120 is connected with control chip 130, control chip 130 is connected with the control end of relay 140, control chip 130 is for detecting the port status of the output voltage of batteries 120 the output voltage control relay 140 according to batteries 120, during the common port conducting of the normal-closed end of relay 140 and relay 140, voltage conversion circuit 110 charges to batteries 120, during the common port conducting of the Chang Kaiduan of relay 140 and relay 140, voltage conversion circuit 110 stops charging to batteries 120.
Concrete, batteries 120 comprises the first storage battery and the second storage battery, and wherein, the positive pole of the first storage battery is connected with the first input pin of control chip 130 with voltage conversion circuit 110 respectively; The positive pole of the second storage battery is connected with the second input pin of control chip 130 with the negative pole of the first storage battery respectively.
Concrete, voltage conversion circuit 110 comprises transformer, rectifier bridge, voltage stabilizing chip, controllable accurate source of stable pressure and potentiometer, wherein, the primary side incoming transport power supply of transformer, the secondary end of transformer is connected with the input of rectifier bridge, the output of rectifier bridge is connected with the input of voltage stabilizing chip respectively, the output of voltage stabilizing chip is connected with the negative electrode of controllable accurate source of stable pressure, the reference pole of controllable accurate source of stable pressure is connected with the variable resistance end of potentiometer, and one end of potentiometer is connected with the positive pole of the first storage battery.
Optionally, charging circuit also comprises drive circuit and buzzer, the output pin of control chip 130 is connected by the control end of drive circuit with relay 140, the input of drive circuit is connected with the output pin of control chip 130, and the output of drive circuit is connected with buzzer with the control end of relay 140 respectively.
Optionally, control chip 130 is single-chip microcomputer, and its model is ATtiny13.
Optionally, in voltage conversion circuit 110, the model of voltage stabilizing chip is LM7805, and the model of controllable accurate source of stable pressure is TL431.
Fig. 2 is the circuit theory diagrams of a kind of charging circuit in the embodiment of the present invention.Refer to Fig. 2, in the embodiment of the present invention, relay 140 is K1, the common port of relay 140 is end 1, the normal-closed end of relay 140 is end 2, the Chang Kaiduan of relay 140 is end 3, the control end of relay 140 is end 4, first storage battery is BT2, second storage battery is BT1, transformer is T1, rectifier bridge is D1, voltage stabilizing chip LM7805 is U1, controllable accurate source of stable pressure TL431 is U2, the reference of controllable accurate source of stable pressure very holds 1, the anode of controllable accurate source of stable pressure is end 2, the negative electrode of controllable accurate source of stable pressure is end 3, potentiometer is R2, the variable resistance end of potentiometer is end 1, one end of potentiometer is end 2, the other end of potentiometer is end 3, control chip ATtiny13 is U3, buzzer is T2.It is pointed out that except above components and parts, charging circuit also comprises resistance R1-R5, triode Q1.
In specific implementation process, AC power can be 220V alternating current, as shown in Figure 2, is added to L and N two ends.220V alternating current exports 12V alternating current after transformer T1, then after rectifier bridge, export 12V direct current, and 12V direct current is added in the 5V direct current of stable output after voltage stabilizing chip U1.
The negative electrode of 5V direct current access controllable accurate source of stable pressure U2, wherein, controllable accurate source of stable pressure U2 and rheostat R2 forms dividing potential drop networking, makes the direct voltage exporting 8.4V in one end of R2, exported the charging current of 900mA by current-limiting resistance R3, be enough to charge to storage battery BT1 and BT2 of series connection.
If the second storage battery BT1 electricity is full of, the second input pin PB4 of control chip U3 will detect the voltage being greater than the second voltage threshold 4.2V, and the output pin PB1 of control chip U3 will export high level.In like manner, if the first storage battery BT2 electricity is full of, and when the voltage that the first input pin PB5 of control chip U3 detects is greater than the first voltage threshold 8.4V, the output pin PB1 of control chip U3 also will export high level.
Further, triode Q1 and resistance R5 forms drive circuit, and when the output pin PB1 of control chip U3 exports high level, drive circuit will order about buzzer and send prompt tone.Meanwhile, the level of the control end of relay K 1 is set high, its normal-closed end 2 and common port 1 no longer conducting, Chang Kaiduan 3 and common port 1 conducting, now 220V AC power cannot access transformer U1, thus will not have charging current input batteries, and realize the function automatically disconnecting charging.
The embodiment of the present invention is by the output voltage of control chip inspection batteries, and utilize the break-make of Control voltage conversion circuit, thus when storage battery is full of electricity, stop charge in batteries, ensureing the life-span of storage battery and solid power, stopping storage battery because overcharging the potential safety hazard caused.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (9)
1. a charging circuit, is characterized in that, described charging circuit comprises voltage conversion circuit, batteries, control chip and relay, wherein:
Described voltage conversion circuit is connected with described batteries, described batteries is connected with described control chip, described control chip is connected with the control end of described relay, described control chip for detect described batteries output voltage and according to the output voltage control of described batteries the port status of relay, during the common port conducting of the normal-closed end of described relay and described relay, described voltage conversion circuit is to described battery charging, during the common port conducting of the Chang Kaiduan of described relay and described relay, described voltage conversion circuit stops to described battery charging.
2. charging circuit as claimed in claim 1, it is characterized in that, described batteries comprises the first storage battery and the second storage battery, and wherein, the positive pole of described first storage battery is connected with the first input pin of described control chip with described voltage conversion circuit respectively; The positive pole of described second storage battery is connected with the second input pin of described control chip with the negative pole of described first storage battery respectively.
3. charging circuit as claimed in claim 2, it is characterized in that, described voltage conversion circuit comprises transformer, rectifier bridge, voltage stabilizing chip, controllable accurate source of stable pressure and potentiometer, wherein, the primary side incoming transport power supply of described transformer, the secondary end of described transformer is connected with the input of described rectifier bridge, the output of described rectifier bridge is connected with the input of described voltage stabilizing chip respectively, the output of described voltage stabilizing chip is connected with the negative electrode of described controllable accurate source of stable pressure, the reference pole of described controllable accurate source of stable pressure is connected with the variable resistance end of described potentiometer, one end of described potentiometer is connected with the positive pole of described first storage battery.
4. charging circuit as claimed in claim 3, it is characterized in that, described AC power after described transformer, described rectifier bridge and described voltage stabilizing chip, obtains low-voltage DC successively;
Described low-voltage DC after described controllable accurate source of stable pressure and described potentiometer, obtains DC charging voltage successively, charges for described batteries.
5. charging circuit as claimed in claim 4, it is characterized in that, if described first storage battery output voltage is higher than default first voltage threshold or described second storage battery output voltage higher than default second voltage threshold, then the output pin of described control chip exports high level;
When the output pin of described control chip exports high level, the Chang Kaiduan of described relay and the common port conducting of described relay, described voltage conversion circuit stops to described battery charging.
6. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises drive circuit and buzzer, the output pin of described control chip is connected with the control end of described relay by described drive circuit, the input of described drive circuit is connected with the output pin of described control chip, and the output of described drive circuit is connected with described buzzer with the control end of described relay respectively.
7. charging circuit as claimed in claim 6, is characterized in that, when the output pin of described control chip exports high level, described drive circuit orders about described buzzer and sends prompt tone.
8. charging circuit as claimed in claim 1, it is characterized in that, described control chip is single-chip microcomputer, and its model is ATtiny13.
9. charging circuit as claimed in claim 3, it is characterized in that, the model of described voltage stabilizing chip is LM7805, and the model of described controllable accurate source of stable pressure is TL431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310539033.9A CN104617645A (en) | 2013-11-04 | 2013-11-04 | Charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310539033.9A CN104617645A (en) | 2013-11-04 | 2013-11-04 | Charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104617645A true CN104617645A (en) | 2015-05-13 |
Family
ID=53151982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310539033.9A Pending CN104617645A (en) | 2013-11-04 | 2013-11-04 | Charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104617645A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107380207A (en) * | 2017-07-19 | 2017-11-24 | 郑州盛源万通科技有限公司 | Anti-jump method, apparatus and track circuit |
| CN109428374A (en) * | 2016-11-10 | 2019-03-05 | 佳纶生技股份有限公司 | display device |
-
2013
- 2013-11-04 CN CN201310539033.9A patent/CN104617645A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428374A (en) * | 2016-11-10 | 2019-03-05 | 佳纶生技股份有限公司 | display device |
| CN107380207A (en) * | 2017-07-19 | 2017-11-24 | 郑州盛源万通科技有限公司 | Anti-jump method, apparatus and track circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104348192A (en) | USB charger of electronic cigarette | |
| CN204190424U (en) | A kind of charge-discharge protection circuit and charge-discharge system | |
| CN105150963A (en) | Stable automobile power supply system | |
| CN102709977A (en) | Solar power generation system controller with alternating current detection control unit | |
| CN103701175B (en) | A kind of charger of automatic identification cell voltage gear | |
| CN103036290B (en) | 24 voltage (V) charger and charging method for lithium iron phosphate battery | |
| CN203481855U (en) | Portable power supply device | |
| CN104617645A (en) | Charging circuit | |
| CN104218648A (en) | Charging and discharging protection circuit and charging and discharging system | |
| CN204144993U (en) | A kind of electric automobile lithium battery charge balancing control circuit | |
| CN201733113U (en) | Portable mobile power supply | |
| CN103683419A (en) | Lithium battery charger capable of identifying high or low voltages automatically | |
| CN206595737U (en) | A kind of lithium battery charging system | |
| CN202997622U (en) | 24V charger possessing dynamic equalization function and used in lithium iron phosphate cell | |
| CN201134695Y (en) | Management circuit for lithium battery charging | |
| CN104617644A (en) | Charging circuit | |
| CN104242412B (en) | The charged state detection means and method of a kind of battery | |
| CN201781295U (en) | Intelligent charger | |
| CN203800631U (en) | Smart battery switching module for power supply charger | |
| CN202333845U (en) | Power battery charging management system | |
| CN207835122U (en) | A kind of charge and discharge control plate of lithium-sulfur cell | |
| CN106253385A (en) | A kind of battery charger | |
| CN204721277U (en) | A kind of solar power supply apparatus | |
| CN206195435U (en) | Battery charge protection circuit | |
| CN204304550U (en) | A kind of intelligent charger with multiple-channel output |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150513 |
|
| WD01 | Invention patent application deemed withdrawn after publication |