CN204741295U - Anti -overcharging's charging circuit - Google Patents
Anti -overcharging's charging circuit Download PDFInfo
- Publication number
- CN204741295U CN204741295U CN201520339296.XU CN201520339296U CN204741295U CN 204741295 U CN204741295 U CN 204741295U CN 201520339296 U CN201520339296 U CN 201520339296U CN 204741295 U CN204741295 U CN 204741295U
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- circuit
- output
- relay
- charging circuit
- charging
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- 230000001131 transforming effect Effects 0.000 claims description 24
- 230000005611 electricity Effects 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides an anti -overcharging's charging circuit, including the vary voltage circuit, charging circuit, comparison circuit and reference voltage, the positive output end of vary voltage circuit is connected with the output positive pole of the output common port of relay and opto -coupler, the output normal close end of relay is connected with charging circuit's positive input terminal, the output of relay is normally opened the end and is connected with an input and the optocoupler output negative pole of relay, charging circuit's the positive output end and the positive pole of battery, comparison circuit's positive input terminal connects, comparison circuit's negative pole input and reference voltage are connected, comparison circuit's output is connected with the positive input terminal of opto -coupler. The utility model discloses a relay breaks off vary voltage circuit and charging circuit after the battery is full of for charging circuit breaks off completely, has avoided being full of the electricity back and to the charging of battery, has avoided crossing the condition of filling.
Description
Technical field
The utility model relates to electronic circuit field, particularly relates to a kind of anti-overcharge charging circuit.
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, is easy to cause the life-span of battery to reduce.
Summary of the invention
The technical problems to be solved in the utility model, is to provide a kind of anti-overcharge charging circuit, solves the problem of over-charging of battery.
The utility model is achieved in that a kind of anti-overcharge charging circuit, 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.
The utility model tool 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 the utility model circuit.
Embodiment
By describing technology contents of the present utility model, 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 utility model provides a kind of anti-overcharge charging circuit, 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 to the utility model, 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 utility model 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.
The foregoing is only embodiment of the present utility model; not thereby scope of patent protection of the present utility model is limited; every utilize the utility model specification 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 utility model.
Claims (1)
1. an anti-overcharge charging circuit, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520339296.XU CN204741295U (en) | 2015-05-25 | 2015-05-25 | Anti -overcharging's charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520339296.XU CN204741295U (en) | 2015-05-25 | 2015-05-25 | Anti -overcharging's charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204741295U true CN204741295U (en) | 2015-11-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520339296.XU Expired - Fee Related CN204741295U (en) | 2015-05-25 | 2015-05-25 | Anti -overcharging's charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204741295U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116298971A (en) * | 2023-03-10 | 2023-06-23 | 北京鸿智电通科技有限公司 | Self-adaptive battery voltage detection circuit, device and quick-charging device |
-
2015
- 2015-05-25 CN CN201520339296.XU patent/CN204741295U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116298971A (en) * | 2023-03-10 | 2023-06-23 | 北京鸿智电通科技有限公司 | Self-adaptive battery voltage detection circuit, device and quick-charging device |
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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: 20151104 Termination date: 20160525 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |