CN206004370U - A kind of rechargeable type USB charging circuit - Google Patents
A kind of rechargeable type USB charging circuit Download PDFInfo
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- CN206004370U CN206004370U CN201621071731.6U CN201621071731U CN206004370U CN 206004370 U CN206004370 U CN 206004370U CN 201621071731 U CN201621071731 U CN 201621071731U CN 206004370 U CN206004370 U CN 206004370U
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Abstract
The utility model belongs to lithium cell charging management domain, and in particular to a kind of rechargeable type USB charging circuit.It includes USB charging port, 11st electric capacity, second resistance, charging chip, 6th resistance, relay, 3rd resistor, 4th electric capacity and battery, 4th pin of charging chip passes through the 11st capacity earth, 4th pin of charging chip and the 8th pin are while connect the pin of USB charging port, second resistance is provided between 4th pin of charging chip and the 7th pin, second pin passes through the 6th resistance eutral grounding, first pin, 3rd pin and the 6th pin are while be grounded, 5th pin connects the positive pole of battery, 3rd pin and octal of the positive pole of battery and negative pole difference contact relay, the crus secunda of relay is output voltage terminal, 9th pin is through 3rd resistor in parallel and the 4th capacity earth.
Description
Technical field
The utility model belongs to lithium cell charging management domain, and in particular to a kind of rechargeable type USB charging circuit.
Background technology
With the development of society, the needs to the environment-protecting clean energy, rechargeable battery get more and more people's extensive concerning, daily
In life, the rechargeable battery species of people's application is a lot, mainly has lead-acid battery, nickel-cadmium cell, Ni-MH battery and lithium battery
Etc..Due to the lithium battery superiority of its own, mobile phone, computer, the industry-by-industry such as electric automobile is had been widely used for.
Lithium battery is a class by lithium metal or Zinc-lithium alloy material be negative pole, the battery using non-aqueous electrolytic solution.Mainly
It is divided into lithium metal battery and lithium ion battery.Lithium battery has the advantage that：The average voltage of cell is 3.7V or 3.2V,
It is approximately equal to the series voltage of 3 nickel-cadmium cells or ni-mh electricity, is easy to constitute battery supply group；With respect to lithium battery energy for battery
Density is high.And lithium battery has high storage energy density；Lightweight with respect to lithium battery for lead-acid battery；Lithium battery service life
Relatively long, service life can reach more than 6 years；Environmental protection, no matter producing, using and scrap, does not all contain, does not produce yet
The poisonous and harmful heavy metallic such as any lead, mercury, cadmium element and material.
Referenced patent document CN203014446U discloses a kind of lithium battery charging circuit, the power supply of lithium battery charging circuit
End connection external power supply, the input of the output end connection charging inlet circuit of lithium battery charging circuit, charging inlet circuit
The input of output end connection lithium battery；The power end connection external power supply of mu balanced circuit, the output end of mu balanced circuit and lithium electricity
The input of the output end connection switching circuit in pond, the output end connection external equipment of switching circuit.The referenced patent document is carried
The lithium battery charging circuit for going out is to ensure that in the case of main power source power-off, switches to lithium battery power supply circuit.
When the electronic equipment with chargeable lithium cell is used, such as mobile phone, often uses people in charging, this meeting
Certain infringement is caused to electronic equipment.When charging using electronic equipment, electronic equipment can be caused to produce big heat, so as to
Reduce battery.
Utility model content
In place of in view of the shortcomings of the prior art, the utility model proposes a kind of rechargeable type USB charging circuit, this fills
Whether circuit is provided with relay in feeder ear, powered by Control battery.When charging, relay disconnects, and is
Battery charges；When not charging, relay is closed, and is that circuit is powered.
The utility model is adopted the following technical scheme that：
A kind of rechargeable type USB charging circuit, it include USB charging port, the 11st electric capacity, second resistance, charging chip,
6th resistance, relay, 3rd resistor, the 4th electric capacity and battery, the 4th pin of charging chip pass through the 11st capacity earth,
4th pin of charging chip and the 8th pin are while connect the pin of USB charging port, the 4th pin of charging chip and the 7th
Second resistance is provided between pin, and second pin passes through the 6th resistance eutral grounding, and the first pin, the 3rd pin and the 6th pin are simultaneously
Ground connection, the 5th pin connect the positive pole of battery, the 3rd pin and octal of the positive pole of battery and negative pole difference contact relay, relay
Crus secunda be output voltage terminal, the 9th pin is through 3rd resistor in parallel and the 4th capacity earth.
Further, also include the second electric capacity, the 5th pin of charging chip passes through the second capacity earth.
Further, also include light emitting diode, light emitting diode is serially connected in the 4th pin and the 7th of charging chip and draws
Between pin, connect with second resistance.
Further, light emitting diode is red or yellow light-emitting diode.
Further, battery is chargeable lithium cell.
The utility model is had the advantage that with respect to prior art：1. the utility model is lithium battery using USB interface
Charge, convenient use；2. for protection circuit, when charging, relay disconnects the utility model, only lithium cell charging,
When not charging, relay is closed, and lithium battery is powered for circuit, is not powered so as to realize charging, and power supply is not charged；3. this practicality
New application is in extensive range.
Description of the drawings
Fig. 1 is the schematic diagram of rechargeable type USB charging circuit.
Specific embodiment
For further illustrating each embodiment, the utility model is provided with accompanying drawing.These accompanying drawings disclose interior for the utility model
A part for appearance, which is mainly in order to illustrate embodiment, and it is former come the running of explaining embodiment to coordinate the associated description of specification
Reason.Coordinate with reference to these contents, those of ordinary skill in the art will be understood that other possible embodiments and this practicality newly
The advantage of type.The component of in figure is not necessarily to scale, and similar element numbers are conventionally used to indicate similar component.
The utility model is further illustrated in conjunction with the drawings and specific embodiments.
Refering to shown in Fig. 1, a kind of schematic diagram of rechargeable type USB charging circuit of the utility model preferably embodiment, bag
Include USB charging port USB5V, the 11st electric capacity C11, second resistance R2, charging chip U1, the second electric capacity C2, the 6th resistance R6,
Relay RELAY1,3rd resistor R3 and the 4th electric capacity C4, the 4th pin of charging chip U1 are connect by the 11st electric capacity C11
Ground, the 4th pin of charging chip U1 and the 8th pin while connect the pin of USB charging port USB5V, the of charging chip U1
Second resistance R2 is provided between four pins and the 7th pin, and second pin is grounded by the 6th resistance R6, and the first pin, the 3rd draw
Pin and the 6th pin are while be grounded, the 5th pin connects the positive pole of lithium battery, the 5th pin is grounded by the second electric capacity C2.Wherein,
J1 interface connects lithium battery.3rd pin and octal of the positive pole of lithium battery and negative pole difference contact relay RELAY1, relay
The crus secunda of RELAY1 is output voltage terminal VCC1, and the 9th pin is through 3rd resistor R3 in parallel and the 4th electric capacity C4 ground connection.The reality
It can be CN3052B to apply charging chip U1 model used by example, it should be noted that the type kind of charging chip U1 is various, ability
Field technique personnel understand, can also adopt TP4056 or CN3056, also can achieve identical function.
J2 interface is USB interface, the 5V voltage that USB5V is provided for USB interface.When USB interface charges, relay
RELAY1 disconnects, and USB is by charging chip to the lithium cell charging for being connected on J1 interface；When not charging, USB5V does not have voltage,
Relay RELAY1 is closed, and lithium battery is that whole circuit is powered.
Additionally, for the working condition for clearly showing that the charging module 2, the charging module 2 of the embodiment also includes to light
Diode (LED) 1, LED 1 are serially connected between the 4th pin of CN3052B chip and the 7th pin, with second resistance
R2 connects.The yellow light-emitting diode that the LED 1 of the embodiment is adopted, skilled person will appreciate that, luminous two
Pole pipe color is various, can also adopt other color LEDs.
Although specifically show and describe the utility model with reference to preferred embodiment, but those skilled in the art should
This is understood, in the spirit and scope of the present utility model limited without departing from appended claims, in form and details
On the utility model can be made a variety of changes, be protection domain of the present utility model.
Claims (5)
1. a kind of rechargeable type USB charging circuit, it is characterised in that：It include USB charging port, the 11st electric capacity, second resistance,
Charging chip, the 6th resistance, relay, 3rd resistor, the 4th electric capacity and battery, the 4th pin of charging chip pass through the 11st
Capacity earth, the 4th pin of charging chip and the 8th pin connect the pin of USB charging port simultaneously, and the 4th of charging chip draws
Second resistance is provided between pin and the 7th pin, and second pin passes through the 6th resistance eutral grounding, the first pin, the 3rd pin and the 6th
Pin is while be grounded, the 5th pin connects the positive pole of battery, the 3rd pin and the 8th of the positive pole of battery and negative pole difference contact relay
Pin, the crus secunda of relay is output voltage terminal, and the 9th pin is through 3rd resistor in parallel and the 4th capacity earth.
2. rechargeable type USB charging circuit as claimed in claim 1, it is characterised in that：Also include the second electric capacity, the charging chip
The 5th pin pass through the second capacity earth.
3. rechargeable type USB charging circuit as claimed in claim 1, it is characterised in that：Also include light emitting diode, described luminous two
Pole pipe is serially connected between the 4th pin of charging chip and the 7th pin, is connected with second resistance.
4. rechargeable type USB charging circuit as claimed in claim 3, it is characterised in that：The light emitting diode is red or yellow
Light emitting diode.
5. rechargeable type USB charging circuit as claimed in claim 1, it is characterised in that：The battery is chargeable lithium cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621071731.6U CN206004370U (en) | 2016-09-22 | 2016-09-22 | A kind of rechargeable type USB charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621071731.6U CN206004370U (en) | 2016-09-22 | 2016-09-22 | A kind of rechargeable type USB charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206004370U true CN206004370U (en) | 2017-03-08 |
Family
ID=58193470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621071731.6U Active CN206004370U (en) | 2016-09-22 | 2016-09-22 | A kind of rechargeable type USB charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206004370U (en) |
-
2016
- 2016-09-22 CN CN201621071731.6U patent/CN206004370U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |