CN204681139U - USB port cellular li-ion battery two grades of chargers - Google Patents

USB port cellular li-ion battery two grades of chargers Download PDF

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Publication number
CN204681139U
CN204681139U CN201520448621.6U CN201520448621U CN204681139U CN 204681139 U CN204681139 U CN 204681139U CN 201520448621 U CN201520448621 U CN 201520448621U CN 204681139 U CN204681139 U CN 204681139U
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China
Prior art keywords
lithium cell
cell charging
pin
circuit
usb port
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Expired - Fee Related
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CN201520448621.6U
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Chinese (zh)
Inventor
周芸
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周芸
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Priority to CN201520448621.6U priority Critical patent/CN204681139U/en
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Publication of CN204681139U publication Critical patent/CN204681139U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model is that its feature comprises about a kind of USB port cellular li-ion battery two grades of chargers: USB port, DC/DC constant current charge and charging current selection circuit, charged state indicating circuit, lithium cell charging interface; The model that lithium cell charging controller IC 1 in described DC/DC constant current charge and charging current selection circuit is selected is MAX1811.This charger obtains 5V DC power supply as working power from computer USB mouth, is reminded after cellular li-ion battery electricity is full of by condition indication circuit.The utility model is set to 100mA or 500mA to lithium cell charging electric current by logic control circuit.Because MAX1811 works in linear model, need not external inductor coil, be built-in with MOSFET power switch, can effectively save circuit board size, reduce manufacture difficulty and cost of manufacture.

Description

USB port cellular li-ion battery two grades of chargers
Technical field
The utility model belongs to cellular li-ion battery charging technique field, is about a kind of USB port cellular li-ion battery two grades of chargers.
Background technology
Widely, the problem that particularly smart mobile phone power consumption is large annoyings everybody always in the use of current mobile phone.Lithium battery thousands of MAH easily that smart mobile phone is joined is its charging seven, eight hours at most with common charger.Run into cellular li-ion battery short of electricity when can not use, charging needs again for a long time, and this brings very burden to cellie.In order to solve cellular li-ion battery quick charge problem, the utility model has designed and produced a kind of USB port cellular li-ion battery two grades of chargers, this charger obtains 5V DC power supply as charger operation power supply from computer USB mouth, reminded by condition indication circuit after cellular li-ion battery electricity is full of, its circuit has good practicality, and has the features such as good reliability, cost of manufacture be low.
The core parts used in the utility model circuit are MAX1811, and it is the USB interface lithium cell charging controller that Maxim is produced, and it can directly be powered by USB port, or by other DC power supply.It meets the current standard of USB, is set to 100mA or 500mA to lithium cell charging electric current by logic control circuit.Because MAX1811 works in linear model, need not external inductor coil, be built-in with MOSFET power switch, can effectively save circuit board size, reduce manufacture difficulty and cost of manufacture.
Below describe in detail USB port cellular li-ion battery described in the utility model two grades of chargers necessity involved in implementation process, guardian technique content.
Utility model content
Goal of the invention and beneficial effect: the utility model has designed and produced a kind of USB port cellular li-ion battery two grades of chargers, this charger obtains 5V DC power supply as charger operation power supply from computer USB mouth, reminded by indicating circuit after cellular li-ion battery electricity is full of, the core parts used in circuit are MAX1811.The utility model can directly be powered by USB port, or by other DC power supply.It meets the current standard of USB, is set to 100mA or 500mA to lithium cell charging electric current by logic control circuit.Because MAX1811 works in linear model, need not external inductor coil, be built-in with MOSFET power switch, can effectively save circuit board size, reduce manufacture difficulty and cost of manufacture.
Circuit working principle: USB port cellular li-ion battery two grades of charger charging currents have 100mA (when selecting interrupteur SW to disconnect), 500mA (when selecting interrupteur SW to close) two gears available.When in circuit, the 1st pin of lithium cell charging controller IC 1 (MAX1811) connects by accompanying drawing 1, maximum charging voltage is 4.2V; When the 1st pin of lithium cell charging controller IC 1 is connected with circuit ground GND, maximum charging voltage is 4.1V.Reach maximum charging voltage once cellular li-ion battery, charging current will sharply reduce, and it is constant to maintain maximum charging voltage.LED indicates as charged state, represents and charge when LED is lighted, and represents that charging terminates when LED extinguishes.
Technical scheme: USB port cellular li-ion battery two grades of chargers, it comprises USB port, DC/DC constant current charge and charging current selection circuit, charged state indicating circuit, lithium cell charging interface, it is characterized in that:
DC/DC constant current charge and charging current selection circuit: it is made up of lithium cell charging controller IC 1, resistance R2 and selector switch SW, the model that lithium cell charging controller IC 1 is selected is MAX1811,1st pin of lithium cell charging controller IC 1, the 4th pin and the 7th pin connection circuit positive pole VCC, one end of interrupteur SW and one end of resistance R2 are selected in 2nd pin selecting of lithium cell charging controller IC 1, the other end connection circuit positive pole VCC of selector switch SW, the 3rd pin of lithium cell charging controller IC 1 and the other end connection circuit ground GND of the 6th pin and resistance R2;
Charged state indicating circuit: it is made up of LED and resistance R1, the 8th pin of lithium cell charging controller IC 1 connects the negative pole of LED, and the positive pole of LED is by resistance R1 connection circuit positive pole VCC;
Lithium cell charging interface: the 5th pin of lithium cell charging controller IC 1 connects the positive pole of electrochemical capacitor C1 and the positive pole of lithium cell charging terminal, the negative pole of electrochemical capacitor C1 and the negative pole connection circuit ground GND of lithium cell charging terminal;
The positive pole connection circuit positive pole VCC of USB port, the negative pole connection circuit ground GND of USB port.
Accompanying drawing explanation
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides a USB port cellular li-ion battery two grades of chargers.
Embodiment
According to the two grades of charger circuit fundamental diagrams of the USB port cellular li-ion battery shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in utility model content, and components and parts technical parameter described in execution mode requires and circuit production main points are carried out enforcement and can be realized the utility model, is further described correlation technique of the present utility model below in conjunction with embodiment.
The technical parameter of components and parts and selection requirement
The model that lithium cell charging controller IC 1 is selected is MAX1811; it adopts and strengthens heat radiating type 8 pin, SO encapsulation; permission dissipation power is 1.4W; MAX1811 inside is provided with Thermal protection diode; the each pin function of MAX1811 is: the 1st pin SELV cell voltage selecting side; 2nd pin SETI charging current arranges end; 3rd pin connection circuit ground GND; 4th pin IN DC supply input; 5th pin is BATT battery voltage detection end; the enable control end of 6th pin connection circuit ground GND, the 7th pin EN, the 8th pin CHG charged state index signal output.
LED is red light emitting diodes, selects diameter ¢ 3 red light emitting diodes;
Resistance all selects metalfilmresistor, and power is 1/8W, and the resistance of resistance R1 is 510 Ω, and the resistance of resistance R2 is 100k Ω;
C1 is electrochemical capacitor, and its capacity is 2.2 μ F/10V;
SW is selector switch, selects self-locking type key switch.
The making main points of circuit, circuit debugging and using method
Because the circuit structure of USB port cellular li-ion battery two grades of chargers is fairly simple, comparison is easy, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, and circuit of the present utility model does not substantially need to carry out debugging and can normally work;
When adopt USB port as working power to lithium cell charging time, for low-power USB port, should by the 2nd pin SETI termination low level of lithium cell charging controller IC 1, its charging current is set as 100mA; For the powerful USB port of use, should by the 2nd pin SETI termination high level of lithium cell charging controller IC 1, now charging current is about 500mA;
By lithium cell charging controller IC 1 the 1st pin SELV termination high level or connect low level, the charging voltage of lithium battery is set to 4.2V or 4.1V respectively; 8th pin CHG of lithium cell charging controller IC 1 holds and allows to light LED between charge period;
The utility model use rated value to be 3.7V/1000mAH lithium battery is tested, when charging current value is 100mA, lithium battery is full of the about 11 hours time of electricity, and the terminal voltage that the lithium battery of 3.7V/1000mAH is full of electricity is 4.2V; When charging current value is 500mA, the time that lithium battery is full of electricity about needs 2.2 hours,
Circuit structure design of the present utility model, components' placement; and the shape of its outward appearance and size etc. are not all key technologies of the present utility model; neither the claimed guardian technique content of the utility model; because not affecting the realization of the utility model specific implementation process and utility model object, therefore do not illustrate one by one in the description.

Claims (1)

1. USB port cellular li-ion battery two grades of chargers, it comprises USB port, DC/DC constant current charge and charging current selection circuit, charged state indicating circuit, lithium cell charging interface, it is characterized in that:
Described DC/DC constant current charge and charging current selection circuit are made up of lithium cell charging controller IC 1, resistance R2 and selector switch SW, the model that lithium cell charging controller IC 1 is selected is MAX1811,1st pin of lithium cell charging controller IC 1, the 4th pin and the 7th pin connection circuit positive pole VCC, one end of interrupteur SW and one end of resistance R2 are selected in 2nd pin selecting of lithium cell charging controller IC 1, the other end connection circuit positive pole VCC of selector switch SW, the 3rd pin of lithium cell charging controller IC 1 and the other end connection circuit ground GND of the 6th pin and resistance R2;
Described charged state indicating circuit is made up of LED and resistance R1, and the 8th pin of lithium cell charging controller IC 1 connects the negative pole of LED, and the positive pole of LED is by resistance R1 connection circuit positive pole VCC;
Described lithium cell charging interface: the 5th pin of lithium cell charging controller IC 1 connects the positive pole of electrochemical capacitor C1 and the positive pole of lithium cell charging terminal, the negative pole of electrochemical capacitor C1 and the negative pole connection circuit ground GND of lithium cell charging terminal;
The positive pole connection circuit positive pole VCC of described USB port, the negative pole connection circuit ground GND of USB port.
CN201520448621.6U 2015-06-26 2015-06-26 USB port cellular li-ion battery two grades of chargers Expired - Fee Related CN204681139U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520448621.6U CN204681139U (en) 2015-06-26 2015-06-26 USB port cellular li-ion battery two grades of chargers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520448621.6U CN204681139U (en) 2015-06-26 2015-06-26 USB port cellular li-ion battery two grades of chargers

Publications (1)

Publication Number Publication Date
CN204681139U true CN204681139U (en) 2015-09-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520448621.6U Expired - Fee Related CN204681139U (en) 2015-06-26 2015-06-26 USB port cellular li-ion battery two grades of chargers

Country Status (1)

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CN (1) CN204681139U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150930

Termination date: 20160626

CF01 Termination of patent right due to non-payment of annual fee