CN103701178A - Computer USB (Universal Serial Bus) port lithium battery rapid-level and slow-level charger - Google Patents
Computer USB (Universal Serial Bus) port lithium battery rapid-level and slow-level charger Download PDFInfo
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- CN103701178A CN103701178A CN201410001627.9A CN201410001627A CN103701178A CN 103701178 A CN103701178 A CN 103701178A CN 201410001627 A CN201410001627 A CN 201410001627A CN 103701178 A CN103701178 A CN 103701178A
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Abstract
The invention provides a computer USB (Universal Serial Bus) port lithium battery rapid-level and slow-level charger, which is characterized by comprising a 5V direct current power source, a direct current power source indicating circuit, a constant voltage and constant current charging circuit, a charging current switching circuit, a charging state indicating circuit and a lithium battery, wherein the constant voltage and constant current charging circuit consists of a lithium battery charging integrated circuit IC1, a resistor R3, an electrolytic capacitor C1 and the lithium battery; the selected model of the lithium battery charging integrated circuit IC1 is MAX811ESA; a second pin of the lithium battery charging integrated circuit IC1 in the charging current switching circuit is connected with a circuit positive electrode VCC by a switch SW. At present, a mobile phone, an MP3, a digital camera or other product is used widely, and lithium batteries cannot be easily interchanged as the boundary dimensions of the lithium batteries are varied; according to the practical condition, the invention designs and manufactures the charger which uses a computer USB port to charge the lithium batteries, and the charger has the advantages that the universality is strong, the charging effect is good, the manufacturing cost is low and the like.
Description
Technical field
The invention belongs to electronics and lithium cell charging technical field, is about two grades of chargers of a kind of computer USB mouth lithium battery speed.
Background technology
The use of the electronic products such as current mobile phone, MP3 or digital camera is very extensive, because profile, the size of their lithium batteries that uses are varied, is difficult to each other exchange use.During outdoor activity or travelling, you just need to be with multiple charger so, otherwise movable lithium battery short of electricity problem is just very difficult to manage outside.Although use universal charger to deal with problems for the moment, if often use universal charger for lithium cell charging, so easily damage valuable lithium battery.According to this actual conditions, the present invention has designed and produced a kind of computer USB mouth that utilizes and has charged for lithium battery, and this circuit has the advantages such as highly versatile, charging effect is good, cost of manufacture is low.
Below describe two grades of chargers of computer USB mouth lithium battery speed of the present invention related correlation technique content in implementation process in detail.
Summary of the invention
Goal of the invention and beneficial effect: the use of the electronic products such as current mobile phone, MP3 or digital camera is very extensive, because profile, the size of their lithium batteries that uses are varied, is difficult to each other exchange use.During outdoor activity or travelling, you just need to be with multiple charger so, otherwise movable lithium battery short of electricity problem is just very difficult to manage outside.Although use universal charger to deal with problems for the moment, if often use universal charger for lithium cell charging, so easily damage valuable lithium battery.According to this actual conditions, the present invention has designed and produced a kind of computer USB mouth that utilizes and has charged for lithium battery, and this circuit has the advantages such as highly versatile, charging effect is good, cost of manufacture is low.
The operation principle of circuit: the needed 5V DC power supply of this charger is from computer USB interface power taking.Because this circuit lithium cell charging is to carry out under constant voltage, constant current state, when the interrupteur SW of charger disconnects, charging current is lOOmA, and when interrupteur SW is closed, charging current is about 500mA.Lithium cell charging integrated circuit (IC) 1(model is MAXl811ESA) the 1st pin while connecting by accompanying drawing, charging voltage is set as 4.2V.Once the charging voltage that reaches setting, the charging current of lithium battery just sharply reduces, and it is constant to maintain maximum charging voltage, meets the charging requirement of lithium battery completely.LED 1 is as the indication of 5V DC power supply, and LED 2 is as charged state indication, and LED 2 is lighted expression and charged, and LED 2 extinguishes to represent to charge and finishes.
Technical scheme: two grades of chargers of computer USB mouth lithium battery speed, it comprises 5V DC power supply, DC power supply indicating circuit, constant voltage constant current charging circuit, charging current commutation circuit, charged state indicating circuit and lithium battery, is characterized in that:
Constant voltage constant current charging circuit: it is by lithium cell charging integrated circuit (IC) 1, resistance R 3, electrochemical capacitor C1 and lithium battery, the model that lithium cell charging integrated circuit (IC) 1 is selected is MAXl811ESA, the 1st pin of lithium cell charging integrated circuit (IC) 1, the anodal VCC of the 4th pin and the 7th pin connection circuit, the 2nd pin of lithium cell charging integrated circuit (IC) 1 is by resistance R 3 connection circuit ground GND, the 3rd pin of lithium cell charging integrated circuit (IC) 1 and the 6th pin connection circuit ground GND, the 5th pin of lithium cell charging integrated circuit (IC) 1 connects the positive pole of electrochemical capacitor C1 and the positive pole of lithium battery, the negative pole connection circuit ground GND of the negative pole of electrochemical capacitor C1 and lithium battery, the 2nd pin of lithium cell charging integrated circuit (IC) 1 connects charging current commutation circuit, the 8th pin of lithium cell charging integrated circuit (IC) 1 connects charged state indicating circuit,
Charging current commutation circuit: the 2nd pin of lithium cell charging integrated circuit (IC) 1 was connected the anodal VCC of interrupteur SW connection circuit;
Charged state indicating circuit: it is comprised of LED 2 and resistance R 2, the negative pole of the 8th pin sending and receiving optical diode LED2 of lithium cell charging integrated circuit (IC) 1, the positive pole of LED 2 is by the anodal VCC of resistance R 2 connection circuits;
The positive pole of 5V DC power supply is connected with circuit anode VCC, and the negative pole of 5V DC power supply is connected with circuit ground GND.
DC power supply indicating circuit: it is comprised of LED 1 and resistance R 1, the negative pole connection circuit ground GND of diode (LED) 1, the positive pole of LED 1 is by the anodal VCC of resistance R 1 connection circuit.
Accompanying drawing explanation
Accompanying drawing is the embodiment circuit working schematic diagram that the invention provides two grades of chargers of a computer USB mouth lithium battery speed.
Embodiment
According to shown in the drawings be circuit working schematic diagram and the accompanying drawing explanation of two grades of chargers of computer USB mouth lithium battery speed, and according to the annexation between components and parts in the each several part circuit described in summary of the invention, and the components and parts technical parameter described in execution mode requires to implement to realize the present invention.
The selection of components and parts and technical parameter thereof
IC1 is lithium cell charging integrated circuit, and the model of selecting is MAXl811ESA;
Resistor power is 1/8W, and the resistance of resistance R 1 is 510 Ω, and the resistance of resistance R 2 is 510 Ω; Resistance R 3 resistances are 10K Ω;
C1 is electrochemical capacitor, and its capacity is 4.7 μ F/10V;
LED1～LED2 is light-emitting diode, and selecting respectively diameter is each 1 of ￠ 5 red light emitting diodes and green LED;
5V DC power supply can be from the USB interface power taking of computer.
Making main points and the circuit debugging of circuit
Because of the circuit structure of two grades of chargers of computer USB mouth lithium battery speed fairly simple, comparison is easy, as long as the electronic devices and components performance of generally selecting is intact, and the components and parts annexation in accompanying drawing is welded to specifications, physical connection line and welding quality are after careful inspection is correct, and circuit of the present invention does not substantially need to carry out any debugging and can normally work;
It is that the lithium battery of 3.7V/1000mAH carries out testing experiment that circuit of the present invention is selected rated value, and this charger, when interrupteur SW disconnects, records charging current and should be lOOmA, and the charging interval is about 12 hours and electric quantity of lithium battery can be full of; When interrupteur SW is closed, record charging current and should be 500mA, the charging interval is approximately 2.5 hours and electric quantity of lithium battery can be full of.
Claims (2)
1. two grades of chargers of computer USB mouth lithium battery speed, it comprises 5V DC power supply, DC power supply indicating circuit, constant voltage constant current charging circuit, charging current commutation circuit, charged state indicating circuit and lithium battery, is characterized in that:
Described constant voltage constant current charging circuit is by lithium cell charging integrated circuit (IC) 1, resistance R 3, electrochemical capacitor C1 and lithium battery, the model that lithium cell charging integrated circuit (IC) 1 is selected is MAXl811ESA, the 1st pin of lithium cell charging integrated circuit (IC) 1, the anodal VCC of the 4th pin and the 7th pin connection circuit, the 2nd pin of lithium cell charging integrated circuit (IC) 1 is by resistance R 3 connection circuit ground GND, the 3rd pin of lithium cell charging integrated circuit (IC) 1 and the 6th pin connection circuit ground GND, the 5th pin of lithium cell charging integrated circuit (IC) 1 connects the positive pole of electrochemical capacitor C1 and the positive pole of lithium battery, the negative pole connection circuit ground GND of the negative pole of electrochemical capacitor C1 and lithium battery, the 2nd pin of lithium cell charging integrated circuit (IC) 1 connects charging current commutation circuit, the 8th pin of lithium cell charging integrated circuit (IC) 1 connects charged state indicating circuit,
In described charging current commutation circuit, the 2nd pin of lithium cell charging integrated circuit (IC) 1 was connected the anodal VCC of interrupteur SW connection circuit;
Described charged state indicating circuit is comprised of LED 2 and resistance R 2, the negative pole of the 8th pin sending and receiving optical diode LED2 of lithium cell charging integrated circuit (IC) 1, and the positive pole of LED 2 is by the anodal VCC of resistance R 2 connection circuits;
The positive pole of described 5V DC power supply is connected with circuit anode VCC, and the negative pole of 5V DC power supply is connected with circuit ground GND.
2. two grades of chargers of computer USB mouth lithium battery speed according to claim 1, it is characterized in that: DC power supply indicating circuit is comprised of LED 1 and resistance R 1, the negative pole connection circuit ground GND of diode (LED) 1, the positive pole of LED 1 is by the anodal VCC of resistance R 1 connection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410001627.9A CN103701178A (en) | 2014-01-02 | 2014-01-02 | Computer USB (Universal Serial Bus) port lithium battery rapid-level and slow-level charger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410001627.9A CN103701178A (en) | 2014-01-02 | 2014-01-02 | Computer USB (Universal Serial Bus) port lithium battery rapid-level and slow-level charger |
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| CN103701178A true CN103701178A (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410001627.9A Pending CN103701178A (en) | 2014-01-02 | 2014-01-02 | Computer USB (Universal Serial Bus) port lithium battery rapid-level and slow-level charger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967163A (en) * | 2015-06-26 | 2015-10-07 | 周芸 | USB port mobile phone lithium battery two-shift charger |
| CN107465227A (en) * | 2015-06-12 | 2017-12-12 | 联想(北京)有限公司 | A kind of electronic equipment and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201025626Y (en) * | 2006-10-27 | 2008-02-20 | 谭信威 | Multi-function solar charger |
| CN101752884A (en) * | 2008-12-10 | 2010-06-23 | 深圳市傲翔天宇电子科技有限公司 | General mobile phone charger with solar panel |
| CN102025176A (en) * | 2010-12-10 | 2011-04-20 | 沈阳化工大学 | Solar charger for nickel-hydrogen rechargeable battery or lithium battery |
| CN201893587U (en) * | 2010-12-10 | 2011-07-06 | 沈阳化工大学 | Solar charging electrical appliance for nickel-hydrogen charging battery or lithium battery |
-
2014
- 2014-01-02 CN CN201410001627.9A patent/CN103701178A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201025626Y (en) * | 2006-10-27 | 2008-02-20 | 谭信威 | Multi-function solar charger |
| CN101752884A (en) * | 2008-12-10 | 2010-06-23 | 深圳市傲翔天宇电子科技有限公司 | General mobile phone charger with solar panel |
| CN102025176A (en) * | 2010-12-10 | 2011-04-20 | 沈阳化工大学 | Solar charger for nickel-hydrogen rechargeable battery or lithium battery |
| CN201893587U (en) * | 2010-12-10 | 2011-07-06 | 沈阳化工大学 | Solar charging electrical appliance for nickel-hydrogen charging battery or lithium battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465227A (en) * | 2015-06-12 | 2017-12-12 | 联想(北京)有限公司 | A kind of electronic equipment and its control method |
| CN104967163A (en) * | 2015-06-26 | 2015-10-07 | 周芸 | USB port mobile phone lithium battery two-shift charger |
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Application publication date: 20140402 |