CN206041574U - Quick charge circuit - Google Patents
Quick charge circuit Download PDFInfo
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- CN206041574U CN206041574U CN201621048452.8U CN201621048452U CN206041574U CN 206041574 U CN206041574 U CN 206041574U CN 201621048452 U CN201621048452 U CN 201621048452U CN 206041574 U CN206041574 U CN 206041574U
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- resistance
- pwm
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- lithium battery
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a quick charge circuit, including MCU, PWM current adjustment circuit, resistance, lithium battery protection IC and lithium cell, MCU includes AD converter and PWM pulse modulation module, the PWM pulse modulation module with PWM current adjustment circuit electric connection, PWM current adjustment circuit electric connection in resistance one end, resistance other end electric connection in lithium battery protection IC, lithium battery protection IC electric connection in the lithium cell just, the negative pole, AD converter electric connection in the resistance both ends. Compared with the prior art, the beneficial effect of the utility model: the utility model discloses to use inside AD converter of MCU and PWM pulse modulation module to be directed against and fill lithium cell characteristic combination control charging current soon, can be for different characteristic lithium cell tailored charge management modes.
Description
Technical field
The utility model is related to electroporation field, and in particular to a kind of quick-charging circuit.
Background technology
Traditional charging scheme adjusts peripheral resistance control charging current using integrated IC, and charging modes follow battery constant current
Constant-voltage charge pattern, its charge efficiency are low, and the charging interval is long.Existing integrated charge IC is adapted to the common capacity type lithium battery of great majority
Charge, but different capabilities battery needs different charging currents, lack flexibility, it is impossible to meet charging interval short enough demand.
Utility model content
The purpose of this utility model is to provide a kind of quick-charging circuit, and which will be using MCU internal A/D converters and PWM
Pulse modulation module can make charging to measure for different qualities lithium battery for filling lithium battery property combination control charging current soon
Management mode, while detect by Current Voltage simultaneously, adjusts PWM duty cycle according to actual conditions, to improve charge efficiency, and
Software protection function is provided to lithium battery.
A kind of quick-charging circuit of the utility model, including MCU, PWM matrix current adjustment circuit, resistance, li-ion cell protection IC
And lithium battery, the MCU includes a/d converter and pwm pulse modulation module, and the pwm pulse modulation module is electric with the PWM
Stream adjustment circuit is electrically connected with, and the PWM matrix current adjustment circuits are electrically connected at described resistance one end, the resistance other end electricity
Property be connected to the li-ion cell protection IC, the li-ion cell protection IC is electrically connected at the lithium battery positive and negative electrode, and the AD turns
Parallel operation is electrically connected at the resistance two ends.
Further, the resistance is precision resistance.
Compared with prior art, the beneficial effects of the utility model：
1) the utility model will be using MCU internal A/D converters and pwm pulse modulation module for filling lithium battery characteristic soon
Combination control charging current, can make Charge Management pattern to measure for different qualities lithium battery.
2) the utility model is detected simultaneously by Current Voltage, adjusts PWM duty cycle according to actual conditions, to improve charging
Efficiency, and software protection function is provided to lithium battery.
Description of the drawings
For the technical scheme being illustrated more clearly that in the utility model embodiment, below will be to making needed for embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present utility model, right
For those of ordinary skill in the art, on the premise of not paying creative work, can be obtaining which according to these accompanying drawings
His accompanying drawing.
Fig. 1 is the utility model quick-charging circuit schematic diagram.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only to explain this
Utility model, is not used to limit the utility model.
It should be noted that when element is referred to as " being fixed on " or " being arranged at " another element, it can be directly another
On one element or may be simultaneously present centering elements.When an element is known as " being connected to " another element, it can
To be directly to another element or may be simultaneously present centering elements.
Also, it should be noted that the orientation term such as left and right, upper and lower in the utility model embodiment, is only relative each other
Concept or be reference with the normal operating condition of product, and should not be regarded as restrictive.
The utility model embodiment one, as shown in figure 1, a kind of quick-charging circuit, including MCU1, PWM electric current adjustment electricity
Road 2, precision resistance 3, li-ion cell protection IC4 and lithium battery 5, the MCU1 include a/d converter 11 and pwm pulse modulation module
12, the pwm pulse modulation module 12 is electrically connected with the PWM matrix current adjustment circuits 2, and the PWM matrix current adjustment circuits 2 are electric
Property is connected to 3 one end of the precision resistance, and 3 other end of the precision resistance is electrically connected at the li-ion cell protection IC4, described
Li-ion cell protection IC4 is electrically connected at 5 positive and negative electrode of the lithium battery, and the a/d converter 11 is electrically connected at the accurate electricity
Hinder 3 two ends.
A/d converter is used for detecting the voltage at 3 two ends of precision resistance, to monitoring system electric current, voltage, pwm pulse modulation
Module is used for control system output current.
PWM matrix current adjustment circuits 2 are used for controlled output charging current, and a/d converter 11 is used for monitoring charging current and preventing
Battery or MCU ends exception, in order to avoid cause the accident.
The utility model quick-charging circuit operation principle：When lithium battery 5 is accessed, system normally starts, and MCU acquiescences are closed
Charging current, a/d converter 11 read the voltage of lithium battery 5, and the adjustment PWM count word amount of pwm pulse modulation module 12 of MCU is exported,
Make system and charge mode is started with less charging current, then, the increase PWM count word amount output of pwm pulse modulation module 12, in 5S
It is interior to carry out constant-current charge so that system charging current rises to appropriate charging current point, meanwhile, the a/d converter 11 of MCU1 is by leading
5 voltage of electric current and lithium battery at 3 two ends of line monitoring precision resistance, after lithium battery 5 is full of, MCU1 closes pwm pulse modulation module
12 outputs, stop charging.
The utility model is directed to different type rechargeable battery, it is only necessary to adjusts in house software, can adjust output current and reach
Expected Results, without the need for change adjustment resistance on hardware.
Preferred embodiment of the present utility model is the foregoing is only, it is not to limit the utility model, all at this
Any modification, equivalent or improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (2)
1. a kind of quick-charging circuit, it is characterised in that including MCU, PWM matrix current adjustment circuit, resistance, li-ion cell protection IC and
Lithium battery, the MCU include a/d converter and pwm pulse modulation module, the pwm pulse modulation module and the PWM electric currents
Adjustment circuit is electrically connected with, and the PWM matrix current adjustment circuits are electrically connected at described resistance one end, and the resistance other end is electrical
The li-ion cell protection IC is connected to, the li-ion cell protection IC is electrically connected at the lithium battery positive and negative electrode, the AD conversion
Device is electrically connected at the resistance two ends.
2. quick-charging circuit according to claim 1, it is characterised in that the resistance is precision resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621048452.8U CN206041574U (en) | 2016-09-08 | 2016-09-08 | Quick charge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621048452.8U CN206041574U (en) | 2016-09-08 | 2016-09-08 | Quick charge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206041574U true CN206041574U (en) | 2017-03-22 |
Family
ID=58300065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621048452.8U Active CN206041574U (en) | 2016-09-08 | 2016-09-08 | Quick charge circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206041574U (en) |
-
2016
- 2016-09-08 CN CN201621048452.8U patent/CN206041574U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |