CN202994997U - Battery electric quantity detection circuit - Google Patents
Battery electric quantity detection circuit Download PDFInfo
- Publication number
- CN202994997U CN202994997U CN 201220462243 CN201220462243U CN202994997U CN 202994997 U CN202994997 U CN 202994997U CN 201220462243 CN201220462243 CN 201220462243 CN 201220462243 U CN201220462243 U CN 201220462243U CN 202994997 U CN202994997 U CN 202994997U
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- battery
- microcontroller
- diode
- electric quantity
- detection circuit
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- Expired - Fee Related
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Abstract
The utility model provides a battery electric quantity detection circuit constituted by a resistor, a diode, and a microcontroller. The microcontroller can be used to convert a voltage drop of the diode into a digital signal for the calculation processing, and the voltage of the battery can be obtained, therefore the battery electric quantity can be obtained by the corresponding voltage-electric quantity relation. By adjusting the models of the components, the circuit can be connected with circuits of electric products requiring the battery power, and the circuit has advantages of simple structure, easy production, low costs, and low power consumption.
Description
Technical field
The utility model belongs to electronics and power technique fields, relates to a kind of battery power detection circuit.
Background technology
Large-scale electronic device or communication apparatus have very advanced battery electric quantity detection system, but in the battery operated portable or hand-held electronic product of a lot of dependences, the battery electric quantity measurement function also relatively is short of.In the electronic product course of work, battery electric quantity can reduce gradually along with the working time, do not have the product of battery electric quantity measuring ability can cause the battery over-discharge can, the over-discharge can of battery can cause the inside battery electrochemical structure to change, make battery undermined, the major accident such as even set off an explosion also can affect the circuit normal operation and battery electric quantity is too low.For fear of the overdischarge phenomenon occurs, a battery power detection circuit can be set in electronic product, the Continuous Tracking battery dump energy, simultaneously dump energy information is shown to the user, reminding user in time charges to battery or changes battery, perhaps automatically cut off the powered battery loop, avoid causing heavy losses.
The utility model content
The utility model purpose and beneficial effect: this utility model purpose is to making battery-powered portable or hand-held electronic product that a kind of battery power detection circuit is provided.
Evidence: the circuit that this utility model provides only uses several common electronic devices and components just to realize the measurement of battery electric quantity.The advantages such as that this circuit has is simple in structure, be easy to make, with low cost and power consumption is few only just need slightly adjust and can be connected with the circuit of the battery powered electronic product of various needs.
The battery power detection circuit that the utility model provides by: a resistance R 1, a diode D4 and a microcontroller IC1 form, and its feature comprises:
Resistance R 1: an end of resistance R 1 is connected to supply voltage VCC, and the other end is connected with the positive pole of diode D4, and resistance R 1 provides bias current for diode D4;
Diode D4: the positive pole of diode D4 is connected with resistance R 1, and the negative pole of diode D4 is connected to the IO mouth of microcontroller IC1, and diode D4 provides reference voltage for voltage detecting;
Microcontroller IC1: the power supply lower margin connecting circuit ground GND of microcontroller IC1, the supply pin of microcontroller IC1 is connected to supply voltage VCC, and the analog to digital conversion input pin of microcontroller IC1 (being again the A/D input pin) connects the positive pole of diode D4.Microcontroller IC1 is the voltage drop VD4 on diode D4, converts the digital signal row operation of going forward side by side to and processes, and draws the supply voltage VCC of battery, thereby judges whether battery is under-voltage.Suppose, the conversion accuracy of A/D is the n position, and the pressure drop of diode is VD4, and the result of A/D sampling is x, and the relation between they and cell voltage VCC is as follows:
Calculate powered battery voltage by following formula, then draw battery electric quantity according to the relation of cell voltage and electric weight.
Description of drawings
Accompanying drawing 2 is infrared rays that utilized battery power detection circuit of the present utility model to realize the battery undervoltage warning function
Telepilot embodiment schematic diagram;
1-1 provides the circuit of reference voltage part to IC1 in battery power detection circuit;
1-2 is the circuit of microcontroller part in battery power detection circuit.
Embodiment
According to battery power detection circuit schematic diagram and description of drawings shown in accompanying drawing 1, and take an infrared remote controller schematic diagram providing shown in accompanying drawing 2 as embodiment, and implement to realize the utility model by the components and parts technical requirement of described embodiment.
The technical parameter of electronic devices and components
The voltage of electric battery BT1 is 3V;
LED1 is infrared transmitting tube, and model is IR204-A, and LED2 selects Ф 3mm red light emitting diodes, and D4 is general-purpose diode, and selecting model is IN4148;
The resistance of resistance R 6 is 10 Ω, and the resistance of R1 is 1K Ω, and the resistance of R7 is 270 Ω, and the resistance of resistance R 11 is 1K Ω:
Q1 is triode, and model is S8050;
IC1 is microcontroller, the SN8F27E62 single-chip microcomputer that this example selects the Taiwan S0NIX to produce, and this model single-chip microcomputer can be worked under 2.0V-5.0V voltage, built-in PWM, the A/D module, and have online programming function (ISP).
K1-K5 is the shift knob of Infrared remote controller, selects common touch-switch.
If the circuit of electronic product itself just is designed with the microcontroller with A/D, so only need to implant the 1-1 part of Fig. 1 in this product circuit, just can carry out battery electric quantity measures, if do not use the electronic product with the microcontroller of A/D, need to utilize the utility model to realize the battery electric quantity measurement, so must be in product circuit 1-1,1-2 two parts circuit of connection layout 1, could realize the battery electric quantity measuring ability.The present embodiment is a Infrared remote controller, itself has just used microcontroller, this part circuit of 1-1 that only need to connect into Fig. 1 can be realized, thus, for different electronic products, only need circuit component model of the present utility model is just slightly adjusted and can be connected with the various circuit that need to measure battery electric quantity.
The present embodiment be take by the battery powered infrared remote controller of 3V as example, the model of electronic devices and components used is to select according to the actual conditions of the present embodiment, it does not affect applicability of the present utility model and ubiquity.If be used in other electronic products, need the resistance according to actual conditions adjusting resistance R1, suitably select the model of microcontroller IC1 to get final product.
Claims (1)
1. a battery power detection circuit, be comprised of a resistance R 1, a diode D4 and a microcontroller IC1, and its feature comprises: an end of resistance R 1 is connected to supply voltage VCC, and the other end is connected with the positive pole of diode D4; The positive pole of diode D4 is connected with resistance R 1, and the negative pole of diode D4 is connected to the IO mouth of microcontroller IC1; The power supply lower margin connecting circuit ground GND of microcontroller IC1, the supply pin of microcontroller IC1 connects supply voltage VCC, and the analog to digital conversion input pin of microcontroller IC1 connects the positive pole of diode D4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220462243 CN202994997U (en) | 2012-09-12 | 2012-09-12 | Battery electric quantity detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220462243 CN202994997U (en) | 2012-09-12 | 2012-09-12 | Battery electric quantity detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202994997U true CN202994997U (en) | 2013-06-12 |
Family
ID=48566166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220462243 Expired - Fee Related CN202994997U (en) | 2012-09-12 | 2012-09-12 | Battery electric quantity detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202994997U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879742A (en) * | 2012-09-12 | 2013-01-16 | 卢运娇 | Battery electric quantity detection circuit |
-
2012
- 2012-09-12 CN CN 201220462243 patent/CN202994997U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879742A (en) * | 2012-09-12 | 2013-01-16 | 卢运娇 | Battery electric quantity detection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20130612 Termination date: 20200912 |