CN104836302A - Self-protection battery charging circuit structure - Google Patents
Self-protection battery charging circuit structure Download PDFInfo
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- CN104836302A CN104836302A CN201510269007.8A CN201510269007A CN104836302A CN 104836302 A CN104836302 A CN 104836302A CN 201510269007 A CN201510269007 A CN 201510269007A CN 104836302 A CN104836302 A CN 104836302A
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Abstract
The invention provides a self-protection battery charging circuit structure, and the structure comprises a voltage transformation circuit, a charging circuit, a comparison circuit, and a reference voltage. The positive output end of the voltage transformation circuit is connected with the output common end of a relay and an output positive electrode of an optical coupler. The output normally-closed end of the relay is connected with the positive input end of the charging circuit, and the output normally-opened end of the relay is connected with one input end of the relay and the output negative electrode of the optical coupler. The positive output end of the charging circuit is connected with the positive electrode of a storage battery pack and the positive input end of the comparison circuit. The negative input end of the comparison circuit is connected with a reference voltage, and the output end of the comparison circuit is connected with the positive input end of the optical coupler. Through the relay, the structure cuts off the voltage transformation circuit and the charging circuit after full charging, thereby enabling the charging circuit to be completely cut off, preventing the battery from being charged after full charging, and avoiding an overcharging condition.
Description
Technical field
The present invention relates to electronic circuit field, particularly relate to a kind of battery charger structure of self-shield.
Background technology
Existing storage battery has the circuit preventing from overcharging; but existing circuit is all when being full of; charging circuit does not export; after having spent a period of time; cell voltage declines a little a little, then charging circuit can charge again, and this has just occurred the situation of floating charge; be easy to cause the life-span of battery to reduce, do not play the effect of protection battery.
Summary of the invention
The technical problem to be solved in the present invention, is the battery charger structure providing a kind of self-shield, solves the problem of over-charging of battery.
The present invention is achieved in that a kind of battery charger structure of self-shield, comprise transforming circuit, charging circuit, comparison circuit and reference voltage, the cathode output end of transforming circuit is connected with the output cathode of the output common port of relay and optocoupler, the output normal-closed end of relay is connected with the electrode input end of charging circuit, the output Chang Kaiduan of relay is connected with an input of relay and optocoupler output negative pole, the cathode output end of charging circuit and the positive pole of storage battery, the electrode input end of comparison circuit connects, the negative input of comparison circuit is connected with reference voltage, the output of comparison circuit is connected with the electrode input end of optocoupler, another input of relay, the cathode output end of transforming circuit, the negative input of charging circuit, the cathode output end of charging circuit, the negative pole of storage battery and the negative input ground connection of optocoupler.
Further, also comprise charging indication light diode, the minus earth of charging indication light diode, the positive pole of charging indication light diode is connected with the output normal-closed end of relay.
Further, also comprise and be full of indication light diode, be full of the minus earth of indication light diode, an input of the positive pole and relay that are full of indication light diode is connected.
Further, also include comparable chip, temperature sensor and OR circuit, temperature sensor is arranged on storage battery, the output of temperature sensor is connected with the in-phase input end of comparable chip, the inverting input of comparable chip is connected with reference voltage, the output of comparable chip is connected with an input of OR circuit, the output of comparison circuit is connected with the electrode input end of optocoupler: the output of comparison circuit is connected with another input of OR circuit, and the output of OR circuit is connected with the electrode input end of optocoupler.
Tool of the present invention has the following advantages: by relay, disconnects transforming circuit and charging circuit after battery is full of, and charging circuit is disconnected completely, avoids the charging be full of to battery after electricity, avoids situation about overcharging.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of one embodiment of the invention circuit.
Fig. 2 is the circuit diagram of another embodiment of the present invention circuit.
Fig. 3 is the circuit diagram of further embodiment of this invention circuit.
Fig. 4 is the circuit diagram of yet another embodiment of the invention circuit.
Embodiment
By describing technology contents of the present invention, structural feature in detail, realized object and effect, accompanying drawing is coordinated to be explained in detail below in conjunction with execution mode.
Refer to Fig. 1, the invention provides a kind of battery charger structure of self-shield, comprise transforming circuit, charging circuit, comparison circuit and reference voltage, the cathode output end of transforming circuit is connected with the output cathode of the output common port of relay LS1 and optocoupler U1, the output normal-closed end of relay is connected with the electrode input end of charging circuit, the output Chang Kaiduan of relay is connected with an input of relay and optocoupler output negative pole, the cathode output end of charging circuit and the positive pole of storage battery BT1, the electrode input end of comparison circuit connects, the negative input of comparison circuit is connected with reference voltage, the output of comparison circuit is connected with the electrode input end of optocoupler, another input of relay, the cathode output end of transforming circuit, the negative input of charging circuit, the cathode output end of charging circuit, the negative pole of storage battery and the negative input ground connection of optocoupler.
Wherein, relay is five pin relays, and under input no power state, the output common port of relay is connected with output normal-closed end, and under the state of input energising, the output common port of relay can be connected with output Chang Kaiduan.According to the voltage of different input, common model has varied, as the JQC-3F etc. of the SRD-12VDC-SL-C of 12V, 5V.Optocoupler is when input is energized, and inner light-emitting diode can be luminous, makes the triode ON of output.Common model has PC817, TLP351 etc.Transforming circuit for realizing the transformation of voltage, thus produces direct voltage, and as changed to output voltage from high direct voltage, DC low-voltage changes to output voltage or alternating voltage changes to direct voltage.Common transforming circuit form comprises LDO, DC-DC and AC-DC etc.If namely common charger for mobile phone is AC-DC transforming circuit.Charging circuit is used for the voltage of potential circuit to be charged in storage battery, and charging circuit can realize voltage detecting, electric current and voltage control etc., can ensure the safety of storage battery.Comparison circuit is for realizing the comparison of reference voltage and battery tension, and when storage battery is full of, the voltage of storage battery can higher than reference voltage, now comparison circuit exports high level, if storage battery is not full of, then battery tension is lower than reference voltage, now comparison circuit output low level.Reference voltage is exactly a stable voltage, simply can carry out electric resistance partial pressure realization to the voltage of transforming circuit, requires that the high reference voltage chip that can adopt realizes stable reference voltage accurately.
In use, transforming circuit connects output dc voltage after external voltage in the present invention, now relay output common port with export Chang Kaiduan and be interconnected, transforming circuit is connected with charging circuit, and charging circuit charges a battery.Now storage battery is not also full of electricity, and voltage is lower, comparison circuit output low level, and optocoupler does not work, and relay does not also work.After storage battery is full of electricity, battery tension raises, battery tension is greater than reference voltage, now optocoupler luminescence work, optocoupler triode ON, the cathode voltage of transforming circuit is made to be added to the input of relay, relay input is made to obtain electric and start adhesive, after adhesive, the output common port of relay is connected with output Chang Kaiduan, the cathode output end of transforming circuit is made directly to receive the input of relay, the energising of latching relay, relay can be remained on always and export common port and the state that is connected of output Chang Kaiduan, thus be disconnected the physical connection of transforming circuit and charging circuit, storage battery is not recharged.Even if battery tension declines to some extent, also can not affect the work of relay, namely relay still can keep the state that the connection of transforming circuit and charging circuit disconnects.And when needs charge again to storage battery, only need the power supply disconnecting transforming circuit, then once charge on the power supply connecting transforming circuit can carry out.Thus avoiding when power supply connects, battery tension declines the problem will carrying out charging a little.The present invention has completely cut off transforming circuit and charging circuit physically, it also avoid transforming circuit to problems such as the electromagnetic interference of charging voltage.
Further, also comprise charging indication light diode D1, the minus earth of charging indication light diode, the positive pole of charging indication light diode is connected with the output normal-closed end of relay.During charging, charging indication light diode D1 can light.
Further, also comprise and be full of indication light diode D2, be full of the minus earth of indication light diode, an input of the positive pole and relay that are full of indication light diode is connected.When being full of, being full of indication light diode D2 can light.
Further, also include comparable chip U2, temperature sensor and OR circuit U3, temperature sensor is arranged on storage battery, the output of temperature sensor is connected with the in-phase input end of comparable chip, the inverting input of comparable chip is connected with reference voltage, the output of comparable chip is connected with an input of OR circuit, the output of comparison circuit is connected with the electrode input end of optocoupler: the output of comparison circuit is connected with another input of OR circuit, and the output of OR circuit is connected with the electrode input end of optocoupler.When the temperature of storage battery is too high, temperature sensor can export high pressure, thus makes comparable chip export high pressure, then OR circuit exports high pressure, and last enable relay disconnects the connection of transforming circuit and charging circuit, ensures cell safety.No matter being arranged so that of OR circuit is that temperature is too high or cell voltage is too high, can allow charging circuit power-off, avoids the danger continuing charging.
The foregoing is only embodiments of the invention; not thereby scope of patent protection of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. the battery charger structure of a self-shield, it is characterized in that: comprise transforming circuit, charging circuit, comparison circuit and reference voltage, the cathode output end of transforming circuit is connected with the output cathode of the output common port of relay and optocoupler, the output normal-closed end of relay is connected with the electrode input end of charging circuit, the output Chang Kaiduan of relay is connected with an input of relay and optocoupler output negative pole, the cathode output end of charging circuit and the positive pole of storage battery, the electrode input end of comparison circuit connects, the negative input of comparison circuit is connected with reference voltage, the output of comparison circuit is connected with the electrode input end of optocoupler, another input of relay, the cathode output end of transforming circuit, the negative input of charging circuit, the cathode output end of charging circuit, the negative pole of storage battery and the negative input ground connection of optocoupler.
2. the battery charger structure of a kind of self-shield according to claim 1; it is characterized in that: also comprise charging indication light diode; the minus earth of charging indication light diode, the positive pole of charging indication light diode is connected with the output normal-closed end of relay.
3. the battery charger structure of a kind of self-shield according to claim 1; it is characterized in that: also comprise and be full of indication light diode; be full of the minus earth of indication light diode, an input of the positive pole and relay that are full of indication light diode is connected.
4. the battery charger structure of a kind of self-shield according to claim 1, it is characterized in that: also include comparable chip, temperature sensor and OR circuit, temperature sensor is arranged on storage battery, the output of temperature sensor is connected with the in-phase input end of comparable chip, the inverting input of comparable chip is connected with reference voltage, the output of comparable chip is connected with an input of OR circuit, the output of comparison circuit is connected with the electrode input end of optocoupler: the output of comparison circuit is connected with another input of OR circuit, the output of OR circuit is connected with the electrode input end of optocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510269007.8A CN104836302A (en) | 2015-05-25 | 2015-05-25 | Self-protection battery charging circuit structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510269007.8A CN104836302A (en) | 2015-05-25 | 2015-05-25 | Self-protection battery charging circuit structure |
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| CN104836302A true CN104836302A (en) | 2015-08-12 |
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| CN201510269007.8A Pending CN104836302A (en) | 2015-05-25 | 2015-05-25 | Self-protection battery charging circuit structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1950998A (en) * | 2003-10-23 | 2007-04-18 | 舒马克电器公司 | System and methods for charging batteries |
| CN101154805A (en) * | 2006-09-26 | 2008-04-02 | 三星电子株式会社 | Power supply device having overvoltage cutoff function, image display device, and method of cutting off overvoltage |
| CN203553910U (en) * | 2013-09-18 | 2014-04-16 | 郑州众智科技股份有限公司 | Storage-battery charging protection circuit |
| CN204046149U (en) * | 2014-08-27 | 2014-12-24 | 郑州众智科技股份有限公司 | Overcharge of a battery protective circuit |
-
2015
- 2015-05-25 CN CN201510269007.8A patent/CN104836302A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1950998A (en) * | 2003-10-23 | 2007-04-18 | 舒马克电器公司 | System and methods for charging batteries |
| CN101154805A (en) * | 2006-09-26 | 2008-04-02 | 三星电子株式会社 | Power supply device having overvoltage cutoff function, image display device, and method of cutting off overvoltage |
| CN203553910U (en) * | 2013-09-18 | 2014-04-16 | 郑州众智科技股份有限公司 | Storage-battery charging protection circuit |
| CN204046149U (en) * | 2014-08-27 | 2014-12-24 | 郑州众智科技股份有限公司 | Overcharge of a battery protective circuit |
Non-Patent Citations (1)
| Title |
|---|
| MAHUAXIAO: "http://www.360doc.com/content/12/1218/14/3679863_254767966.shtml", 《360DOC个人图书馆》 * |
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Application publication date: 20150812 |
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