CN204794039U - Charging circuit with charge indication - Google Patents

Charging circuit with charge indication Download PDF

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Publication number
CN204794039U
CN204794039U CN201520340185.0U CN201520340185U CN204794039U CN 204794039 U CN204794039 U CN 204794039U CN 201520340185 U CN201520340185 U CN 201520340185U CN 204794039 U CN204794039 U CN 204794039U
Authority
CN
China
Prior art keywords
output
circuit
relay
charging circuit
charging
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.)
Expired - Fee Related
Application number
CN201520340185.0U
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Chinese (zh)
Inventor
林碧琴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhou Fei Electronic Science And Technology Co Ltd Of Nan'an Of Quanzhou City
Original Assignee
Zhou Fei Electronic Science And Technology Co Ltd Of Nan'an Of Quanzhou City
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhou Fei Electronic Science And Technology Co Ltd Of Nan'an Of Quanzhou City filed Critical Zhou Fei Electronic Science And Technology Co Ltd Of Nan'an Of Quanzhou City
Priority to CN201520340185.0U priority Critical patent/CN204794039U/en
Application granted granted Critical
Publication of CN204794039U publication Critical patent/CN204794039U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a charging circuit with charge indication, 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, can instruct the condition about being full of again.

Description

A kind of charging circuit with charging instruction
Technical field
The utility model relates to electronic circuit field, particularly relates to a kind of charging circuit with charging instruction.
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 charging circuit with charging instruction, solves the problem of over-charging of battery.
The utility model is achieved in that a kind of charging circuit with charging instruction, 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 minus earth of light-emitting diode, the positive pole of light-emitting diode is connected with the output normal-closed end of relay.
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, avoid the charging be full of to battery after electricity, avoid situation about overcharging, after being full of electricity, light-emitting diode can be lit, and realizes being full of prompting.
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 charging circuit with charging instruction, 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, the minus earth of light-emitting diode D1, the positive pole of light-emitting diode is connected with the output normal-closed end of relay.
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.Light-emitting diode obtains electric lighting simultaneously, and instruction accumulator positive is at charge condition.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.Simultaneously light-emitting diode not electricly not work.Even if now 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. one kind has the charging circuit of charging instruction, 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, the minus earth of light-emitting diode, the positive pole of light-emitting diode is connected with the output normal-closed end of relay.
CN201520340185.0U 2015-05-25 2015-05-25 Charging circuit with charge indication Expired - Fee Related CN204794039U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520340185.0U CN204794039U (en) 2015-05-25 2015-05-25 Charging circuit with charge indication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520340185.0U CN204794039U (en) 2015-05-25 2015-05-25 Charging circuit with charge indication

Publications (1)

Publication Number Publication Date
CN204794039U true CN204794039U (en) 2015-11-18

Family

ID=54534022

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520340185.0U Expired - Fee Related CN204794039U (en) 2015-05-25 2015-05-25 Charging circuit with charge indication

Country Status (1)

Country Link
CN (1) CN204794039U (en)

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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: 20151118

Termination date: 20160525