CN206559098U - A kind of lithium battery USB quick charges manage circuit - Google Patents
A kind of lithium battery USB quick charges manage circuit Download PDFInfo
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- CN206559098U CN206559098U CN201720250456.2U CN201720250456U CN206559098U CN 206559098 U CN206559098 U CN 206559098U CN 201720250456 U CN201720250456 U CN 201720250456U CN 206559098 U CN206559098 U CN 206559098U
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Abstract
The utility model is related to a kind of lithium battery USB quick charges management circuit, including：USB charging circuit units, MCU control circuit unit, the first potential-divider network unit, the second potential-divider network unit, the first drive circuit unit, the second drive circuit unit, charge current sample unit, charge protection unit and charging switching element；MCU control circuit unit is connected with the first potential-divider network unit, the second potential-divider network unit, the first drive circuit unit, charge current sample unit and lithium battery group; first drive circuit unit is connected by the second drive circuit unit with charge protection unit, and charge protection unit is connected with charging switching element and lithium battery group.The utility model is using 2 grades of drivings come driving power metal-oxide-semiconductor, that accelerates power MOS pipe is turned on and off speed, reduce power attenuation, reduce heating and energy loss, input of the present utility model is pressure-resistant to bring up to 20V, and charging current can be adjusted flexibly, and maximum can accomplish 8A, circuit is simple, makes cost lower.
Description
Technical field
The utility model belongs to lithium cell charging technical field, more particularly to a kind of lithium battery USB quick charges management electricity
Road.
Background technology
Development, extension with portable power source product, more and more extensive using field, present lithium battery is given from simple
Mobile phone continuation of the journey charging, lifting arrived give notebook continuation of the journey charging, to automotive ignition, inflate a tire wait numerous areas, these lead
The lithium battery product in domain, is no longer simple 5V input and output, it is necessary to which product provides more voltage outputs to meet different necks
The demand in domain.
The lithium electricity lithium battery USB quick charges management circuit of prior art, can only typically accomplish maximum 3A charging current
Pressure-resistant general arrive 6V, it is impossible to meet the existing quick charge demand to lithium battery group, meanwhile, prior art to Charge Management not
Science, the loss for easily occurring energy expends larger electric energy, produces heat, raises the operating temperature of circuit, and then influences
To the stabilization of electronic component performance, or even the damage of product is caused, therefore, prior art needs to improve.
The content of the invention
In order to solve the above mentioned problem of prior art presence, the utility model discloses a kind of lithium battery USB quick charges
Circuit is managed, including：
USB charging circuit units, MCU control circuit unit, the first potential-divider network unit, the second potential-divider network unit,
One drive circuit unit, the second drive circuit unit, charge current sample unit, charge protection unit and charging switching element；
The USB charging circuit units connect charging equipment by USB interface, and the circuit for providing 5V to charging circuit is defeated
Go out, the USB charging circuit units are connected with the charging switching element, the USB charging circuit units include USB interface and
Filter capacitor C1, C2, described filter capacitor C1, C2 are used to stablize input voltage；
MCU control circuit unit and the first potential-divider network unit, the second potential-divider network unit, the first drive circuit list
Member, charge current sample unit and lithium battery group connection, are adopted for receiving the first potential-divider network unit, the second potential-divider network unit
The voltage signal of collection, and send pwm control signal to the first drive circuit unit；
The first potential-divider network unit is used for the magnitude of voltage of detection input, and monitoring voltage value is sent to MCU controls
Circuit unit processed, MCU control circuit unit judges input voltage value judges current whether in the charging voltage threshold value of setting
Whether input terminal voltage is applied to charging, and the first potential-divider network unit includes：Resistance R7, R8；
The second potential-divider network unit is used to detect current lithium battery voltage, and the current battery level of detection is sent
To MCU control circuit unit, whether MCU control circuit unit judges battery voltage value reaches the lithium battery voltage threshold value of setting,
And judge whether to stop to lithium cell charging, the second potential-divider network unit includes：Resistance R20, R19 and electric capacity C7；
The first order drive circuit unit includes resistance R3, R4 and triode Q5, for receiving MCU control circuit unit
The pwm control signal of transmission, and by pwm control signal control triode Q5 conducting and cut-off, and colelctor electrode electricity will be passed through
Press the working condition of change the second drive circuit unit of control of signal；
The second level drive circuit unit include triode Q3, Q4 and resistance R2, described triode Q3, Q4 base stage with
Triode Q5 colelctor electrode connection, by receiving triode Q5 collector voltages, controls triode Q3, Q4 conducting and cut-off,
And drive the opening and closing of charging switching element；
The charging current collecting unit is used to gather charging current parameter, and collection current parameters are sent to MCU controls
Circuit unit processed, the electric current of battery charging is adjusted by MCU control circuit unit, and the charging current collecting unit includes：Resistance
R5, R6 and electric capacity C5；
The charge protection unit is connected with charging switching element and lithium battery group, electric in charging circuit for protecting
Element and lithium battery group, the charge protection unit include sustained diode 6, inductance L1, electric capacity C22 and C23, the pole of afterflow two
Pipe D6 connects with inductance L1, and the induced voltage not produced for protection circuit element by inductance punctures or burnt out, the inductance L1
For will belong to voltage conversion into the voltage being adapted to lithium cell charging, the electric capacity C22 and C23 is in parallel with lithium battery group, uses
In the voltage for stablizing lithium battery group；
The charging switching element includes metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, the metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 and driven in the second level
On and off under the control of circuit unit, forms the opening and closing to charging circuit.
In another embodiment that circuit is managed based on above-mentioned lithium battery USB quick charges, the charging voltage threshold value is：
4.5V≤charging voltage threshold value≤5.5V.
In another embodiment that circuit is managed based on above-mentioned lithium battery USB quick charges, the battery voltage threshold is
12.6V。
In another embodiment that circuit is managed based on above-mentioned lithium battery USB quick charges, the MCU control circuit unit
Including MCU chip；
The second pin of the MCU chip is connected with the second potential-divider network unit, for receiving the second potential-divider network unit
The current battery level of detection；3rd pin of the MCU chip is connected with the first potential-divider network unit, for receiving first point
Press the input voltage of NE detection；7th pin of the MCU chip is connected with first order drive circuit unit, and to
One-level drive circuit unit sends pwm control signal；5th pin of the MCU chip is connected with charge current sample unit,
Sample rate current for receiving charge current sample unit, and the pwm control signal for adjusting the 7th pin according to sample rate current is defeated
Go out；When the second pin detects current battery level and reaches battery voltage threshold, the 7th pin output pwm control signal
Dutycycle is turned down, switchs to constant-voltage charge pattern.
Compared with prior art, the utility model has advantages below：
The utility model is using 2 grades of drivings come driving power metal-oxide-semiconductor, and that accelerates power MOS pipe is turned on and off speed, subtracts
Few power attenuation, and then heating and energy loss are reduced, it is connected on the resistance of GND to realize constant-current charge by detection,
Constant-voltage charge is realized by detecting the voltage of battery, and then reaches the constant-current constant-voltage charging of lithium battery, so as to be effectively accomplished
The purpose of reasonable employment, input of the present utility model is pressure-resistant to bring up to 20V, charging current can be adjusted flexibly, and maximum can be done
To 8A, using safer, circuit it is simple, it is necessary to component it is few, can be arranged in pairs or groups, be made with the more flexible size according to product
Cost is lower.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used in description of the prior art does one and simply introduced.
Fig. 1 is a kind of circuit diagram of one embodiment of lithium battery USB quick charges management circuit of the present utility model.
In figure：1 USB charging circuit units, 2 MCU control circuit units, 3 first potential-divider network units, 4 second partial pressures
NE, 5 first drive circuit units, 6 second drive circuit units, 7 charge current sample units, 8 charge protection units,
9 charging switching elements.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is only a part of embodiment of the utility model, rather than whole embodiments.Based in the utility model
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of the utility model protection.
Fig. 1 is the structural representation that a kind of lithium battery USB quick charges of the present utility model manage circuit, as shown in figure 1,
The lithium battery USB quick charges management circuit includes：
USB charging circuit units 1, MCU control circuit unit 2, the first potential-divider network unit 3, the second potential-divider network unit
4th, the first drive circuit unit 5, the second drive circuit unit 6, charge current sample unit 7, charge protection unit 8 and charging are opened
Close unit 9；
The USB charging circuit units 1 connect charging equipment by USB interface, and the circuit for providing 5V to charging circuit is defeated
Go out, the USB charging circuit units 1 are connected with the charging switching element 9, the USB charging circuit units 1 connect including USB
Mouth and filter capacitor C1, C2, described filter capacitor C1, C2 are used to stablize input voltage；
MCU control circuit unit 2 and the first potential-divider network unit 3, the second potential-divider network unit 4, first driving electricity
Road unit 5, charge current sample unit 7 and lithium battery group connection, for receiving the first potential-divider network unit 3, the second partial pressure net
The voltage signal that network unit 4 is gathered, and send pwm control signal to the first drive circuit unit 5；
The first potential-divider network unit 3 is used for the magnitude of voltage of detection input, and monitoring voltage value is sent to MCU controls
Circuit unit 2 processed, MCU control circuit unit 2 judges input voltage value whether in the charging voltage threshold value of setting, and judges to work as
Whether preceding input terminal voltage is applied to charging, and the first potential-divider network unit 3 includes：Resistance R7, R8, the charging voltage threshold
It is worth and is：4.5V≤charging voltage threshold value≤5.5V；
The second potential-divider network unit 4 is used to detect current lithium battery voltage, and the current battery level of detection is sent out
MCU control circuit unit 2 is delivered to, MCU control circuit unit 2 judges whether battery voltage value reaches the lithium battery voltage threshold of setting
Value, and judge whether to stop to lithium cell charging, the second potential-divider network unit 4 includes：Resistance R20, R19 and electric capacity C7,
The battery voltage threshold is 4.2V；
The first order drive circuit unit 5 includes resistance R3, R4 and triode Q5, for receiving MCU control circuit list
The pwm control signal that member 2 is sent, and by pwm control signal control triode Q5 conducting and cut-off, and colelctor electrode will be passed through
The working condition of change the second drive circuit unit 6 of control of voltage signal；
The second level drive circuit unit 6 includes triode Q3, Q4 and resistance R2, described triode Q3, Q4 base stage
It is connected with triode Q5 colelctor electrode, by receiving triode Q5 collector voltages, controls triode Q3, Q4 conducting and cut
Only, and the opening and closing of charging switching element 9 are driven；
The charging current collecting unit 7 is used to gather charging current parameter, and collection current parameters are sent to MCU controls
Circuit unit 2 processed, the electric current of battery charging is adjusted by MCU control circuit unit 2, and the charging current collecting unit 7 includes：Electricity
Hinder R5, R6 and electric capacity C5；
The charge protection unit 8 is connected with charging switching element 9 and lithium battery group, for protecting the electricity in charging circuit
Gas element and lithium battery group, the charge protection unit 8 include sustained diode 6, inductance L1, electric capacity C22 and C23, afterflow two
Pole pipe D6 connects with inductance L1, and the induced voltage not produced for protection circuit element by inductance punctures or burnt out, the inductance
L1 is used to that voltage conversion will to be belonged into the voltage being adapted to lithium cell charging, and the electric capacity C22 and C23 is in parallel with lithium battery group,
Voltage for stablizing lithium battery group；
The charging switching element 9 includes metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, the metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 and driven in the second level
On and off under the control of dynamic circuit unit 6, forms the opening and closing to charging circuit.
The MCU control circuit unit 2 includes MCU chip；
The second pin of the MCU chip is connected with the second potential-divider network unit 4, for receiving the second potential-divider network unit
The current battery level of 4 detections；3rd pin of the MCU chip is connected with the first potential-divider network unit 3, for receiving first
The input voltage that potential-divider network unit 3 is detected；7th pin of the MCU chip is connected with first order drive circuit unit 5, and
Pwm control signal is sent to first order drive circuit unit 5；5th pin of the MCU chip and charge current sample unit 7
Connection, the sample rate current for receiving charge current sample unit 7, and the PWM for adjusting the 7th pin according to sample rate current are controlled
Signal output；When the second pin detects current battery level and reaches battery voltage threshold, the output PWM controls of the 7th pin
The dutycycle of signal is turned down, switchs to constant-voltage charge pattern.
When having control source, the 3rd pin of MCU chip receives a magnitude of voltage, and the 7th pin starts to
The output pwm signal of one-level drive circuit unit 5, triode Q5 conducting, and then metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 conducting is influenceed, make
The electric energy of input is transferred on inductance L1, and inductance L1 is then converted to low pressure to charge the battery.
The voltage above resistance R6 that 5th pin of MCU chip is gathered according to charge current sample unit 7 come judge work as
Preceding current value, and then the 7th pin is adjusted to the output pwm signal of first order drive circuit unit 5, when second pin is detected
The voltage of battery reaches 4.2V, and the pwm signal dutycycle that the 7th pin is exported is turned down, constant-voltage charge pattern is gone to, when the 5th
The sample rate current that pin is received is less than after certain value, stops charging.
A kind of lithium battery USB quick charges management circuit provided by the utility model is described in detail above,
Specific case used herein is set forth to principle of the present utility model and embodiment, and the explanation of above example is only
It is to be used to help understand method of the present utility model and its core concept；Simultaneously for those of ordinary skill in the art, foundation
Thought of the present utility model, will change in specific embodiments and applications, in summary, in this specification
Appearance should not be construed as to limitation of the present utility model.
Finally it should be noted that：Preferred embodiment of the present utility model is the foregoing is only, this is not limited to
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it can still modify to the technical scheme described in foregoing embodiments, or to which part technical characteristic
Equivalent substitution is carried out, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements made etc.,
It should be included within protection domain of the present utility model.
Claims (4)
1. a kind of lithium battery USB quick charges manage circuit, it is characterised in that including：USB charging circuit units, MCU control electricity
Road unit, the first potential-divider network unit, the second potential-divider network unit, the first drive circuit unit, the second drive circuit unit, fill
Electric current sampling unit, charge protection unit and charging switching element；
The USB charging circuit units connect charging equipment by USB interface, and 5V circuit output, institute are provided to charging circuit
State USB charging circuit units to be connected with the charging switching element, the USB charging circuit units include USB interface and filtering
Electric capacity C1, C2, described filter capacitor C1, C2 are used to stablize input voltage；
MCU control circuit unit and the first potential-divider network unit, the second potential-divider network unit, the first drive circuit unit,
Charge current sample unit and lithium battery group connection, for receiving the first potential-divider network unit, the collection of the second potential-divider network unit
Voltage signal, and to the first drive circuit unit send pwm control signal；
The first potential-divider network unit is used for the magnitude of voltage of detection input, and monitoring voltage value is sent to MCU control electricity
Road unit, MCU control circuit unit judges input voltage value judges current input whether in the charging voltage threshold value of setting
Whether terminal voltage is applied to charging, and the first potential-divider network unit includes：Resistance R7, R8；
The second potential-divider network unit is used to detect current lithium battery voltage, and by the current battery level of detection send to
Whether MCU control circuit unit, MCU control circuit unit judges battery voltage value reaches the lithium battery voltage threshold value of setting, and
Judge whether to stop to lithium cell charging, the second potential-divider network unit includes：Resistance R20, R19 and electric capacity C7；
The first order drive circuit unit includes resistance R3, R4 and triode Q5, is sent for receiving MCU control circuit unit
Pwm control signal, and control by pwm control signal triode Q5 conducting and cut-off, and will believe by collector voltage
Number change control the second drive circuit unit working condition；
The second level drive circuit unit includes triode Q3, Q4 and resistance R2, described triode Q3, Q4 base stage and three poles
Pipe Q5 colelctor electrode connection, by receiving triode Q5 collector voltages, control triode Q3, Q4 conducting and cut-off, and drives
The opening and closing of dynamic charging switching element；
The charging current collecting unit is used to gather charging current parameter, and collection current parameters are sent to MCU control electricity
Road unit, the electric current of battery charging is adjusted by MCU control circuit unit, and the charging current collecting unit includes：Resistance R5, R6
With electric capacity C5；
The charge protection unit is connected with charging switching element and lithium battery group, for protecting the electrical equipment in charging circuit
And lithium battery group, the charge protection unit include sustained diode 6, inductance L1, electric capacity C22 and C23, sustained diode 6
Connected with inductance L1, the induced voltage not produced for protection circuit element by inductance punctures or burnt out, the inductance L1 is used for
Voltage conversion will be belonged into the voltage being adapted to lithium cell charging, the electric capacity C22 and C23 is in parallel with lithium battery group, for steady
Determine the voltage of lithium battery group；
The charging switching element includes metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, and the metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 are in the second stage drive circuit
On and off under the control of unit, forms the opening and closing to charging circuit.
2. lithium battery USB quick charges according to claim 1 manage circuit, it is characterised in that the charging voltage threshold
It is worth and is：4.5V≤charging voltage threshold value≤5.5V.
3. lithium battery USB quick charges according to claim 1 manage circuit, it is characterised in that the lithium battery voltage
Threshold value is 4.2V.
4. lithium battery USB quick charges according to claim 1 manage circuit, it is characterised in that the MCU control circuit
Unit includes MCU chip；
The second pin of the MCU chip is connected with the second potential-divider network unit, for receiving the detection of the second potential-divider network unit
Current battery level；3rd pin of the MCU chip is connected with the first potential-divider network unit, for receiving the first partial pressure net
The input voltage of network unit detection；7th pin of the MCU chip is connected with first order drive circuit unit, and to the first order
Drive circuit unit sends pwm control signal；5th pin of the MCU chip is connected with charge current sample unit, is used for
The sample rate current of charge current sample unit is received, and the pwm control signal for adjusting the 7th pin according to sample rate current is exported；Institute
When stating second pin and detecting current battery level and reach battery voltage threshold, the 7th pin exports the duty of pwm control signal
Than turning down, switch to constant-voltage charge pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720250456.2U CN206559098U (en) | 2017-03-15 | 2017-03-15 | A kind of lithium battery USB quick charges manage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720250456.2U CN206559098U (en) | 2017-03-15 | 2017-03-15 | A kind of lithium battery USB quick charges manage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206559098U true CN206559098U (en) | 2017-10-13 |
Family
ID=60365311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720250456.2U Expired - Fee Related CN206559098U (en) | 2017-03-15 | 2017-03-15 | A kind of lithium battery USB quick charges manage circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206559098U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277814A (en) * | 2019-06-18 | 2019-09-24 | Oppo广东移动通信有限公司 | Charging equipment and charging method |
| CN110676898A (en) * | 2019-09-16 | 2020-01-10 | Oppo广东移动通信有限公司 | Device to be charged |
| CN115864610A (en) * | 2023-02-24 | 2023-03-28 | 国网信息通信产业集团有限公司 | Lithium battery management system for primary and secondary integrated feeder terminal |
-
2017
- 2017-03-15 CN CN201720250456.2U patent/CN206559098U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277814A (en) * | 2019-06-18 | 2019-09-24 | Oppo广东移动通信有限公司 | Charging equipment and charging method |
| CN110277814B (en) * | 2019-06-18 | 2023-06-13 | Oppo广东移动通信有限公司 | Equipment to be charged and charging method |
| CN110676898A (en) * | 2019-09-16 | 2020-01-10 | Oppo广东移动通信有限公司 | Device to be charged |
| CN115864610A (en) * | 2023-02-24 | 2023-03-28 | 国网信息通信产业集团有限公司 | Lithium battery management system for primary and secondary integrated feeder terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171013 Termination date: 20190315 |