Измеритель емкости и разрядки

Измеритель емкости и разрядки литий-ионного аккумулятора 18650 своими руками с использованием Arduino.

Схема позволяет полностью разряжать батарею и выдаёт результат о том, какую ёмкость она имеет. Кроме того, это отличный способ выявить неисправные батареи или плохие батареи, в том числе с ложными заявлениями о ёмкости, чем часто грешат китайские производители.

Скетч: Li-Ion.ino

#define g  11  // назначаем имена пинов для удобства
#include
#include 
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
int ThermistorPin = A1;
int Vo;
float R1 = 10000;
float logR2, R2, T;
float c1 = 1.009249522e-03, c2 = 2.378405444e-04, c3 = 2.019202697e-07;
const int Current [] = {0,70,100,190,350,400,500,620,700,830,910,1000};
const int PWM_RES [] = {0, 1, 2, 4, 8, 9, 12, 15, 17, 20, 22, 24};
int l = 0;
const float Low_BAT_level = 3.4;
const byte PWM_Pin = 3;
const byte Buzzer = 9;
const int BAT_Pin = A0;
int PWM_Value = 0;
unsigned long Capacity = 0;
int ADC_Value = 0;
float Vcc = 5.04 ; // Voltage of Arduino 5V pin ( Mesured by Multimeter after connecting external 9V Supply )
float BAT_Voltage = 0;
float sample =0;
byte Hour = 0, Minute = 0, Second = 0;
bool calc = false, Done = false;
Button UP_Button(11, 25, false, true);
Button Down_Button(12, 25, false, true);
// 'Circuit-Digest-Logo', 128x64px
const unsigned char myBitmap [] PROGMEM = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0x9f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xbf, 0xff, 0xff, 0xff, 0x9f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0x03, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xf2, 0x39, 0xff, 0xff, 0xfe, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xe2, 0x06, 0xff, 0xf8, 0x1c, 0xff, 0xff, 0xff, 0xe7, 0xfe, 0x07, 0xef, 0xff, 0xff, 0xff, 0xff,
  0xe4, 0x21, 0xff, 0xe0, 0x19, 0xff, 0xff, 0xff, 0xe7, 0x3e, 0xf3, 0xef, 0xff, 0xff, 0xff, 0xe7,
  0xf1, 0x80, 0x7f, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3e, 0xfd, 0xff, 0xff, 0xff, 0xff, 0xe7,
  0xc1, 0x00, 0x3f, 0x8f, 0xff, 0xff, 0xe7, 0xff, 0xff, 0x1e, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xe7,
  0x82, 0x00, 0x7f, 0x9f, 0xf9, 0xc1, 0x81, 0x9e, 0x66, 0x06, 0xfe, 0xef, 0x03, 0xc1, 0xe0, 0xc1,
  0xfe, 0x3f, 0xff, 0x9f, 0xf9, 0xc3, 0x1f, 0x9e, 0x66, 0x0e, 0xfe, 0xee, 0x7b, 0xbc, 0xdf, 0xe7,
  0xc0, 0x00, 0x3f, 0x9f, 0xf9, 0xcf, 0x3f, 0x9e, 0x67, 0x3e, 0xfe, 0xee, 0xfb, 0xbe, 0xdf, 0xe7,
  0x80, 0x8f, 0xff, 0x9f, 0xf9, 0xcf, 0x3f, 0x9e, 0x67, 0x3e, 0xfe, 0xec, 0xfb, 0x00, 0xe3, 0xe7,
  0xc0, 0xd0, 0x7f, 0x8f, 0xf9, 0xcf, 0x3f, 0x9e, 0x67, 0x3e, 0xfe, 0xee, 0xfb, 0x3f, 0xfc, 0xe7,
  0xfc, 0x60, 0x7f, 0xc7, 0xf9, 0xcf, 0x3f, 0x9e, 0x67, 0x3e, 0xfc, 0xee, 0xfb, 0xbf, 0xfe, 0xe7,
  0xe3, 0x03, 0xff, 0xe0, 0x19, 0xcf, 0x01, 0x80, 0x67, 0x3e, 0xf1, 0xee, 0x7b, 0x9f, 0xfe, 0xe7,
  0xe1, 0x09, 0xff, 0xf0, 0x19, 0xcf, 0xc1, 0xc0, 0xe7, 0x3e, 0x07, 0xef, 0x03, 0xc1, 0xc0, 0xf7,
  0xf0, 0x31, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfb, 0xff, 0xff, 0xff,
  0xfc, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfb, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf7, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0f, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
// Array of all bitmaps for convenience. (Total bytes used to store images in PROGMEM = 1040)
void setup () {
Serial.begin(9600);
pinMode(PWM_Pin, OUTPUT);
pinMode(Buzzer, OUTPUT);
analogWrite(PWM_Pin, PWM_RES[l]);
UP_Button.begin();
Down_Button.begin();
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.clearDisplay();
display.drawBitmap(0, 0, myBitmap, 128, 64, WHITE);
display.display();
delay(3500);
display.setTextColor(WHITE);
display.clearDisplay();
display.setTextSize(2);
display.setCursor(2,15);
display.print("Adj Curr:");
display.setCursor(2,40);
display.print("UP   Down:");
display.print("0");
display.display();
}
//************************* End of Setup function *******************************
void loop() {
  UP_Button.read();
  Down_Button.read();
if (UP_Button.wasReleased() && l < 11 && calc == false)
 {
  l=l+1;
  display.clearDisplay();
  display.setCursor(2,25);
  display.print("Curr:");  
  display.print(String(Current[l])+"mA");
  display.display(); 
 }
if (Down_Button.wasReleased() && l > 0 && calc == false)
{  
  l=l-1;
  display.clearDisplay();
  display.setCursor(2,25);
  display.print("Curr:");  
  display.print(String(Current[l])+"mA");
  display.display(); 
}
if (UP_Button.pressedFor (1000) && calc == false)
{
  analogWrite(PWM_Pin,PWM_RES[l]);
  digitalWrite(Buzzer, HIGH);
  delay(1500);
  digitalWrite(Buzzer, LOW);
  display.clearDisplay();
  timerInterrupt();  
  }
}
//************************* End of Loop function *******************************
void timerInterrupt(){
  calc = true;
  while (Done == false)  {
     Second ++;
    if (Second == 60)  {
      Second = 0;
      Minute ++;     
    }
    if (Minute == 60)  {
      Minute = 0;
      Hour ++;
    }
 //************ Measuring Battery Voltage ***********
for(int i=0;i< 100;i++)
  {
   sample=sample+analogRead(BAT_Pin); //read the Battery voltage
   delay (2);
  }
  sample=sample/100;
  BAT_Voltage = sample * (Vcc/ 1024.0);
  temp();
 //*********************************************
    display.clearDisplay();
    display.setTextSize(2);
    display.setCursor(20,5);
    display.print(String(Hour) + ":" + String(Minute) + ":" + String(Second));
    display.setTextSize(1);
    display.setCursor(0,25);
    display.print("Disch Curr: ");  
    display.print(String(Current[l])+"mA");
    display.setCursor(2,40);  
    display.print("Bat:" + String(BAT_Voltage)+"V" );
    display.setCursor(63,40);
    display.print("Temp:"+String(T,1));
    display.setCursor(116,35);
    display.print(".");
    display.setCursor(122,40);
    display.print("C");
    Capacity =  (Hour * 3600) + (Minute * 60) + Second;
    Capacity = (Capacity * Current[l]) / 3600;
    display.setCursor(2, 55);
    display.print("Capacity:" + String(Capacity) + "mAh");
    display.display();
    if (BAT_Voltage < Low_BAT_level)
    {
      Capacity =  (Hour * 3600) + (Minute * 60) + Second;
      Capacity = (Capacity * Current[l]) / 3600;
      display.clearDisplay();
      display.setTextSize(2);     
      display.setCursor(2,15);    
      display.print("Capacity:");
      display.setCursor(2,40); 
      display.print(String(Capacity) + "mAh");
      display.display();
      Done = true;
      l = 0;
      analogWrite(PWM_Pin, PWM_RES[l]);
      digitalWrite(Buzzer, HIGH);
      delay(100);
      digitalWrite(Buzzer, LOW);
      delay(100);
      digitalWrite(Buzzer, HIGH);
      delay(100);
      digitalWrite(Buzzer, LOW);
      delay(100);
    }
       delay(1000);
  }   
}
    void temp()
    {
       Vo = analogRead(ThermistorPin);
       R2 = R1 * (1023.0 / (float)Vo - 1.0);
       logR2 = log(R2);
       T = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
       T = T - 273.15;
    }

Теги: #аккумуляторы