CN205720600U - A kind of battery electric quantity checking device of portable power source - Google Patents

Abstract

This utility model provides the battery electric quantity checking device of a kind of portable power source, solves existing portable power source battery electric quantity and divides uneven and electricity and show inaccurate problem.Its scheme is, including central processing unit, display circuit, warning circuit, electric quantity detecting circuit, described electric quantity detecting circuit is connected with central processing unit, and central processing unit is connected with display circuit, and central processing unit is connected with warning circuit.This utility model simple in construction, electric quantity detecting circuit charged state, discharge condition, voltage, electric current, temperature and residual capacity measurement to accumulator, and shown dump energy, voltage, current information by display module, improve the accuracy of detection of the battery electric quantity of portable power source, when battery electric quantity is full of or is vented, alarm module is reported to the police, and reminds user pull out power supply or charge for portable power source.

Description

A kind of battery electric quantity checking device of portable power source

Technical field

This utility model relates to battery electric quantity detection technique field, the battery electric quantity detection dress of a kind of portable power source Put.

Background technology

Along with the appearance of the mobile electronic product of Large Copacity highly energy-consuming, mobile stand-by power supply develops the most therewith, mobile Stand-by power supply is also known as charger baby, is to make up the not enough of the battery electric quantity of mobile electronic product own, such as hands The electronic product of the high energy consumption such as machine, flat board, portable power source itself is to be made up of jumbo lithium battery and internal control circuit, control Circuit processed is divided into two kinds, and one is simple boost control chip combination with the MCU composition, and another kind is special integrated circuit Formed integrates charging, the comprehensive Circuits System of boost, cross stream and short-circuit protection etc..

And the electricity of portable power source shows to be substantially show with the display mode of four LED, namely will total electricity Measure and be divided into four parts, 25%, 50%, 75% and 100%, respectively four LED show, and the discharge and recharge of battery and battery electricity Pressing non-linear relation, electricity so can be caused to divide uneven, electricity shows inaccurate.

Summary of the invention

For above-mentioned situation, for overcoming the defect of prior art, the purpose of this utility model is to provide a kind of mobile electricity The battery electric quantity checking device in source, efficiently solves existing portable power source battery electric quantity and divides uneven and electricity and show inaccurate Problem.

Its technical scheme solved is, including central processing unit, display circuit, warning circuit, electric quantity detecting circuit, described Electric quantity detecting circuit is connected with central processing unit, and central processing unit is connected with display circuit, and central processing unit is with warning circuit even Connect,

Described electric quantity detecting circuit includes that chip U1 that model is SX2106, model are the chip U2 of DS2762, accumulator B1, field effect transistor Q1 and field effect transistor Q2, described model is the power supply of the 5 pin input 4.5V-21V of the chip U1 of SX2106 Vin, model is that 4 pins of the chip U1 of SX2106 are connected with one end of resistance R1, and the other end of resistance R1 with model is 5 pins of the chip U1 of SX2106 connect, and model is the negative pole that the 5 of the chip U1 of SX2106 draws foot meridian capacitor C1 and accumulator B1 Connecting, model is the negative pole that 2 pins of the chip U1 of SX2106 connect accumulator B1, and model is 1 pin of the chip U1 of SX2106 Being connected through 6 pins of electric capacity C2 with the chip U1 that model is SX2106, model is 6 pins and the inductance L1 of the chip U1 of SX2106 One end connect, the other end of inductance L1 is connected with one end of resistance R2, and the other end of resistance R2 is connected with one end of resistance R3, The negative pole of another termination accumulator B1 of resistance R3 connects, and model is 3 pins one end with electric capacity C3 of the chip U1 of SX2106 Connecting, the other end of electric capacity C3 is connected with one end of resistance R2, and one end of resistance R2 is connected with one end of electric capacity C4, electric capacity C4's The negative pole of another termination accumulator B1, the other end of inductance L1 is connected with the source electrode of field effect transistor Q1, the source electrode of field effect transistor Q1 Being connected with one end of electric capacity C5, the other end of electric capacity C5 is connected with the drain electrode of field effect transistor Q1, the drain electrode of field effect transistor Q1 and field The source electrode of effect pipe Q2 connects, and the source electrode of field effect transistor Q2 is connected with one end of electric capacity C6, the other end of electric capacity C6 and field effect The drain electrode of pipe Q2 connects, and the grid of field effect transistor Q1 is connected with one end of resistance R4, and the other end of resistance R4 with model is 1 pin of the chip U2 of DS2762 connects, and model is 1 pin of the chip U2 of DS2762 and the chip U2 that model is DS2762 2 pins connect, and model is that 2 pins of the chip U2 of DS2762 are connected with 3 pins of the chip U2 that model is DS2762, and model is 3 pins of the chip U2 of DS2762 are connected with one end of resistance R6, and the other end of resistance R6 is connected with the source electrode of field effect transistor Q1, The other end of resistance R6 is connected with one end of electric capacity C7, and the negative pole of another termination accumulator B1 of electric capacity C7, model is DS2762 4 pins of chip U2 be connected with 5 pins of the chip U2 that model is DS2762, model is 5 pins of the chip U2 of DS2762 Be connected with 6 pins of the chip U2 that model is DS2762, model be 6 pins and the model of the chip U2 of DS2762 be DS2762's 7 pins of chip U2 connect, and model is that 7 pins of the chip U2 of DS2762 are connected with one end of resistance R7, another of resistance R7 End is for leading-out terminal P1.0, and model is that the 8 of the chip U2 of DS2762 draws foot meridian capacitor C8 and draws with the 9 of the chip U2 that model is DS2762 Foot connect, model be 10 pins of the chip U2 of DS2762 be leading-out terminal PS, leading-out terminal PS connects electric source modes selector, and model is 11 pins of the chip U2 of DS2762 are connected with 12 pins of the chip U2 that model is DS2762, and model is the chip U2 of DS2762 12 pins be connected with 13 pins of the chip U2 that model is DS2762, model is 11 pins and the electric capacity of the chip U2 of DS2762 One end of C11 connects, and the other end of electric capacity C11 is connected with one end of resistance R9, and another termination accumulator B1 of resistance R9 is just Pole, the other end of electric capacity C11 is connected with 15 pins of the chip U2 that model is DS2762, and model is the 16 of the chip U2 of DS2762 Pin is connected with one end of resistance R8, the positive pole of another termination accumulator B1 of resistance R8；

Described central processing unit, display circuit and warning circuit include single-chip microcomputer U3,12864 liquid that model is AT89C51 Crystal display LCD1 and buzzer BUZ1, described model is that 1 pin of the single-chip microcomputer U3 of AT89C51 is connected with leading-out terminal P1.0, Model be 39 pins of the single-chip microcomputer U3 of AT89C51,38 pins, 37 pins, 36 pins, 35 pins, 34 pins, 33 pins, 32 Pin is connected with 2 pins, 3 pins, 4 pins, 5 pins, 6 pins, 7 pins, 8 pins and 9 pins of exclusion J1 respectively, exclusion J1 1 pin meet power supply VCC, model be 39 pins of the single-chip microcomputer U3 of AT89C51,38 pins, 37 pins, 36 pins, 35 pins, 34 pins, 33 pins, 32 pins respectively with 16 pins of 12864 liquid crystal display LCD1,15 pins, 14 pins, 13 pins, 12 Pin, 11 pins, 10 pins and 9 pins connect, model be 21 pins of the single-chip microcomputer U3 of AT89C51,22 pins, 23 pins, 24 pins and 25 pins are connected with 1 pin, 2 pins, 8 pins, 7 pins and 6 pins of 12864 liquid crystal display LCD1 respectively, 18 pins of 12864 liquid crystal display LCD1 are connected with the maximum end of potentiometer RV1, the slider of potentiometer RV1 with 5 pins of 12864 liquid crystal display LCD1 connect, the minima termination power VCC of potentiometer RV1,12864 liquid crystal displays 17 pins of LCD1 and 4 pins all meet the 3 pin ground connection GND of power supply VCC, 12864 liquid crystal display LCD1, and model is 28 pins of the single-chip microcomputer U3 of AT89C51 are connected with the base stage of NPN type triode Q3, and the colelctor electrode of audion Q3 meets power supply VCC, The emitter stage of audion Q3 is connected with one end of buzzer BUZ1, the other end ground connection GND of buzzer BUZ1.

This utility model simple in construction, electric quantity detecting circuit to the charged state of accumulator, discharge condition, voltage, electric current, Temperature and residual capacity measurement, and shown dump energy, voltage, current information by display module, improve the electricity of portable power source The accuracy of detection of pond electricity, when battery electric quantity is full of or is vented, alarm module is reported to the police, and reminds user to pull out power supply or for mobile Power source charges.

Accompanying drawing explanation

Fig. 1 is the circuit connection diagram of the battery power detection circuit of portable power source of the present utility model；

Fig. 2 is the circuit connection diagram of central processing unit of the present utility model, display circuit and warning circuit.

Detailed description of the invention

Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.

In conjunction with shown in Fig. 1 and Fig. 2, the battery electric quantity checking device of a kind of portable power source of the present utility model, described type Number being that 19 pins of single-chip microcomputer U3 of AT89C51 are connected with one end of electric capacity C9, model is that the 19 of the single-chip microcomputer U3 of AT89C51 draws Foot is connected with one end of crystal oscillator X1, and model is that 18 pins of the single-chip microcomputer U3 of AT89C51 are connected with one end of electric capacity C10, model 18 pins of single-chip microcomputer U3 for AT89C51 are connected with the other end of crystal oscillator X1, another of the other end of electric capacity C9 and electric capacity C10 Holding all ground connection GND, model is that 9 pins of the single-chip microcomputer U3 of AT89C51 are connected with one end of electric capacity C12, and model is AT89C51's 9 pins of single-chip microcomputer U3 are connected with one end of reset key K, and the other end of electric capacity C12 and the other end of reset key K all connect electricity Source VCC, model is that 9 pins of the single-chip microcomputer U3 of AT89C51 are connected with one end of resistance R10, the other end ground connection of resistance R10 GND。

Described model be the chip U1 of SX2106 be blood pressure lowering synchronous rectification chip, there is soft start and Cycle by Cycle crossed stream and protected Protect, short-circuit protection and the function of overheat protector.

Described model be the chip U2 of DS2762 for judging the overvoltage of accumulator B1, overdischarge and over-current state, supervise in real time Survey the dump energy of accumulator B1.

This utility model in use,

Described model be the chip U1 of SX2106 be blood pressure lowering synchronous rectification chip, model is the chip U1 of SX2106, resistance R1-R3, electric capacity C1-4, inductance L1 and chip U2 that model is DS2762 and field effect transistor Q1, field effect transistor Q2, electric capacity C8, electricity The electric quantity detecting circuit of resistance R8, resistance R9 composition accumulator B1, when the real-time voltage of accumulator B1 is setting minimum voltage and Between high voltage during change, model is that 1 pin of the chip U2 of DS2762 and 3 pins can be according to the real-time voltages of accumulator B1 Change output low and high level, when the real-time voltage of accumulator B1 is less than when setting minimum voltage, can charge for accumulator B1 again；

Model is that the overvoltage of accumulator B1, overdischarge and over-current state information that the chip U2 of DS2762 will determine that send extremely Model is the single-chip microcomputer U3 of AT89C51, after the single-chip microcomputer U3 analyzing and processing that model is AT89C51, model is AT89C51's Single-chip microcomputer U3 controls the whether discharge and recharge of accumulator B1.

Model is that the dump energy information of accumulator B1 of monitoring is uploaded to model is AT89C51 for the chip U2 of DS2762 Single-chip microcomputer U3, after single-chip microcomputer U3 that model is AT89C51 analyzing and processing, send to 12864 liquid crystal displays, show The dump energy of accumulator B1, when the electricity of accumulator B1 too low or full time, model is the 28 of the single-chip microcomputer U3 of AT89C51 Pin output high level, make NPN type triode Q3 turn on, buzzer BUZ1 report to the police, prompting user's portable power source to be charged or Charging completes.

This utility model simple in construction, electric quantity detecting circuit to the charged state of accumulator, discharge condition, voltage, electric current, Temperature and residual capacity measurement, and shown dump energy, voltage, current information by display module, improve the electricity of portable power source The accuracy of detection of pond electricity, when battery electric quantity be full of or emptying time, alarm module report to the police, remind user's portable power source to be charged or Person's charging completes.

Claims (2)

1. a battery electric quantity checking device for portable power source, including central processing unit, display circuit, warning circuit, electricity inspection Slowdown monitoring circuit, described electric quantity detecting circuit is connected with central processing unit, and central processing unit is connected with display circuit, central processing unit with Warning circuit connects, it is characterised in that

Described electric quantity detecting circuit includes that chip U1 that model is SX2106, model are the chip U2 of DS2762, accumulator B1, field Effect pipe Q1 and field effect transistor Q2, described model is the power supply Vin of the 5 pin input 4.5V-21V of the chip U1 of SX2106, type Number being that 4 pins of chip U1 of SX2106 are connected with one end of resistance R1, the other end of resistance R1 and model are the core of SX2106 5 pins of sheet U1 connect, and model is that the 5 of the chip U1 of SX2106 draws foot meridian capacitor C1 and is connected with the negative pole of accumulator B1, model 2 pins for the chip U1 of SX2106 connect the negative pole of accumulator B1, model be the 1 of the chip U1 of SX2106 draw foot meridian capacitor C2 with Model is that 6 pins of the chip U1 of SX2106 connect, and model is that 6 pins of the chip U1 of SX2106 connect with one end of inductance L1 Connecing, the other end of inductance L1 is connected with one end of resistance R2, and the other end of resistance R2 is connected with one end of resistance R3, resistance R3's The negative pole of another termination accumulator B1 connects, and model is that 3 pins of the chip U1 of SX2106 are connected with one end of electric capacity C3, electric capacity The other end of C3 is connected with one end of resistance R2, and one end of resistance R2 is connected with one end of electric capacity C4, another termination of electric capacity C4 The negative pole of accumulator B1, the other end of inductance L1 is connected with the source electrode of field effect transistor Q1, the source electrode of field effect transistor Q1 and electric capacity C5 One end connect, the other end of electric capacity C5 is connected with the drain electrode of field effect transistor Q1, the drain electrode of field effect transistor Q1 and field effect transistor Q2 Source electrode connect, the source electrode of field effect transistor Q2 is connected with one end of electric capacity C6, the other end of electric capacity C6 and the leakage of field effect transistor Q2 Pole connects, and the grid of field effect transistor Q1 is connected with one end of resistance R4, and the other end of resistance R4 and model are the chip of DS2762 1 pin of U2 connects, and model is that 1 pin of the chip U2 of DS2762 is connected with 2 pins of the chip U2 that model is DS2762, type Number being connected with 3 pins of the chip U2 that model is DS2762 for 2 pins of chip U2 of DS2762, model is the chip of DS2762 3 pins of U2 are connected with one end of resistance R6, and the other end of resistance R6 is connected with the source electrode of field effect transistor Q1, another of resistance R6 End is connected with one end of electric capacity C7, and the negative pole of another termination accumulator B1 of electric capacity C7, model is that the 4 of the chip U2 of DS2762 draws Foot is connected with 5 pins of the chip U2 that model is DS2762, model be 5 pins and the model of the chip U2 of DS2762 be DS2762 6 pins of chip U2 connect, model be 6 pins and the model of the chip U2 of DS2762 be 7 pins of the chip U2 of DS2762 Connecting, model is that 7 pins of the chip U2 of DS2762 are connected with one end of resistance R7, and the other end of resistance R7 is leading-out terminal P1.0, model is that the 8 of the chip U2 of DS2762 draws 9 pins of foot meridian capacitor C8 and the chip U2 that model is DS2762 and is connected, type Number being leading-out terminal PS for 10 pins of chip U2 of DS2762, leading-out terminal PS connects electric source modes selector, and model is DS2762's 11 pins of chip U2 are connected with 12 pins of the chip U2 that model is DS2762, and model is 12 pins of the chip U2 of DS2762 Being connected with 13 pins of the chip U2 that model is DS2762, model is 11 pins and the one of the electric capacity C11 of the chip U2 of DS2762 End connects, and the other end of electric capacity C11 is connected with one end of resistance R9, the positive pole of another termination accumulator B1 of resistance R9, electric capacity The other end of C11 is connected with 15 pins of the chip U2 that model is DS2762, model be the chip U2 of DS2762 16 pins with One end of resistance R8 connects, the positive pole of another termination accumulator B1 of resistance R8；

Described central processing unit, display circuit and warning circuit include single-chip microcomputer U3,12864 liquid crystal that model is AT89C51 Showing device LCD1 and buzzer BUZ1, described model is that 1 pin of the single-chip microcomputer U3 of AT89C51 is connected with leading-out terminal P1.0, model For 39 pins of single-chip microcomputer U3 of AT89C51,38 pins, 37 pins, 36 pins, 35 pins, 34 pins, 33 pins, 32 pins It is connected with 2 pins, 3 pins, 4 pins, 5 pins, 6 pins, 7 pins, 8 pins and 9 pins of exclusion J1 respectively, the 1 of exclusion J1 Pin meets power supply VCC, model be 39 pins of the single-chip microcomputer U3 of AT89C51,38 pins, 37 pins, 36 pins, 35 pins, 34 Pin, 33 pins, 32 pins respectively with 16 pins of 12864 liquid crystal display LCD1,15 pins, 14 pins, 13 pins, 12 draw Foot, 11 pins, 10 pins and 9 pins connect, model be 21 pins of the single-chip microcomputer U3 of AT89C51,22 pins, 23 pins, 24 Pin and 25 pins are connected with 1 pin, 2 pins, 8 pins, 7 pins and 6 pins of 12864 liquid crystal display LCD1 respectively, 18 pins of 12864 liquid crystal display LCD1 are connected with the maximum end of potentiometer RV1, the slider of potentiometer RV1 with 5 pins of 12864 liquid crystal display LCD1 connect, the minima termination power VCC of potentiometer RV1,12864 liquid crystal displays 17 pins of LCD1 and 4 pins all meet the 3 pin ground connection GND of power supply VCC, 12864 liquid crystal display LCD1, and model is 28 pins of the single-chip microcomputer U3 of AT89C51 are connected with the base stage of NPN type triode Q3, and the colelctor electrode of audion Q3 meets power supply VCC, The emitter stage of audion Q3 is connected with one end of buzzer BUZ1, the other end ground connection GND of buzzer BUZ1.

The battery electric quantity checking device of a kind of portable power source the most according to claim 1, it is characterised in that described model is 19 pins of the single-chip microcomputer U3 of AT89C51 are connected with one end of electric capacity C9, model be the single-chip microcomputer U3 of AT89C51 19 pins with One end of crystal oscillator X1 connects, and model is that 18 pins of the single-chip microcomputer U3 of AT89C51 are connected with one end of electric capacity C10, and model is 18 pins of the single-chip microcomputer U3 of AT89C51 are connected with the other end of crystal oscillator X1, the other end of electric capacity C9 and the other end of electric capacity C10 Ground connection GND, model is that 9 pins of the single-chip microcomputer U3 of AT89C51 are connected with one end of electric capacity C12, and model is the list of AT89C51 9 pins of sheet machine U3 are connected with one end of reset key K, and the other end of electric capacity C12 and the other end of reset key K all connect power supply VCC, model is that 9 pins of the single-chip microcomputer U3 of AT89C51 are connected with one end of resistance R10, the other end ground connection GND of resistance R10.