3.7v 2000mah 18650 Li-Ion Battery Documentation

Component Name

3.7v 2000mah 18650 Li-Ion Battery

Description

The 3.7v 2000mah 18650 Li-Ion Battery is a rechargeable lithium-ion battery designed for use in a wide range of applications, including Internet of Things (IoT) devices, wireless sensors, and other portable electronics. This battery is a popular choice due to its high energy density, long cycle life, and relatively low self-discharge rate.

Functionality

The primary function of this battery is to store electrical energy that can be used to power devices and systems. It consists of a lithium-ion cell with a nominal voltage of 3.7 volts and a capacity of 2000 milliampere-hours (mAh). The battery's internal chemistry allows it to charge and discharge repeatedly, making it a reliable choice for applications that require a stable power source.

Key Features

Nominal Voltage: 3.7 volts
Capacity: 2000 milliampere-hours (mAh)
Size: 18650 (18mm diameter, 65mm length)
Chemistry: Lithium-ion (Li-Ion)
Cycle Life: Up to 500 charge/discharge cycles
Self-Discharge Rate: Less than 2% per month
Operating Temperature: -20C to 45C (-4F to 113F)
Charging Method: Standard CC/CV (Constant Current/Constant Voltage) charging
Protection Circuit: Internal protection against overcharge, over-discharge, and short-circuit
Certifications: Compliant with international safety standards, such as UN38.3, CE, and RoHS

Dimensions

18mm (diameter) x 65mm (length)

Weight

Approximately 45 grams

Terminal Type

Standard 18650 battery terminal (positive and negative)

Applications

The 3.7v 2000mah 18650 Li-Ion Battery is suitable for use in a variety of IoT applications, including

Wireless sensor nodes

Wearable devices

Smart home devices

Industrial automation systems

Portable electronics

Robotics and drones

Safety Precautions

When working with the 3.7v 2000mah 18650 Li-Ion Battery, it is essential to follow proper safety precautions to avoid damage, injury, or fire. These precautions include

Handling the battery with care to avoid mechanical damage

Avoiding short-circuiting the battery terminals

Charging the battery according to the recommended charging method and avoiding overcharging

Storing the battery in a cool, dry place away from flammable materials

Disposing of the battery according to local regulations and guidelines

By following the guidelines and precautions outlined above, the 3.7v 2000mah 18650 Li-Ion Battery can provide reliable and efficient power for a wide range of IoT applications.

Pin Configuration

Component Documentation: 3.7v 2000mah 18650 Li-Ion Battery
Overview
The 3.7v 2000mah 18650 Li-Ion Battery is a rechargeable lithium-ion battery designed for use in IoT devices, robots, and other applications where compact power sources are required. This documentation explains the pinout and connection details of the battery.
Pinout
The 18650 Li-Ion Battery has two terminals:
Positive Terminal (+)
Pin 1: Positive (Red Wire)
+ Function: Supplies power to the load (device or circuit)
+ Voltage: 3.7V nominal, 4.2V maximum charging voltage
+ Current: Up to 2C (4000mA) continuous discharge, 1C (2000mA) recommended
Negative Terminal (-)
Pin 2: Negative (Black Wire)
+ Function: Returns power from the load (device or circuit) to the battery
+ Voltage: 0V nominal, 2.5V minimum discharge voltage
+ Current: Up to 2C (4000mA) continuous discharge, 1C (2000mA) recommended
Connection Guidelines
When connecting the battery to a device or circuit:
1. Polarity is critical: Ensure the positive terminal (red wire) is connected to the positive input of the device or circuit, and the negative terminal (black wire) is connected to the negative input.
2. Use appropriate wire gauge: Select a wire with sufficient current-carrying capacity to handle the maximum discharge current (2C or 4000mA).
3. Protect against over-discharge: Implement a low-voltage cutoff (LVC) or battery protection circuit to prevent deep discharge, which can damage the battery.
4. Avoid short circuits: Ensure the battery terminals are not short-circuited, as this can cause a safety hazard and damage the battery.
5. Charge correctly: Use a compatible charging circuit or charger that follows the recommended charging profile for lithium-ion batteries.
Important Safety Precautions
Handle the battery with care to avoid physical damage, which can cause a safety hazard.
Follow proper charging and discharging procedures to prevent thermal runaway or explosion.
Keep the battery away from children and pets.
Dispose of the battery according to local regulations and guidelines.
By following these guidelines and precautions, you can safely and effectively use the 3.7v 2000mah 18650 Li-Ion Battery in your IoT projects and applications.

Code Examples

Component Documentation: 3.7V 2000mAh 18650 Li-Ion Battery

Overview

The 3.7V 2000mAh 18650 Li-Ion Battery is a rechargeable lithium-ion battery designed for use in various IoT applications. It features a compact 18650 form factor, making it suitable for integration into small devices, including wearable electronics, robots, and other battery-powered systems.

Technical Specifications

Nominal Voltage: 3.7V
 Capacity: 2000mAh
 Chemistry: Lithium-Ion (Li-Ion)
 Form Factor: 18650
 Weight: Approximately 45g
 Dimensions: 18.3mm (Diameter) x 65.2mm (Length)

Connecting the Battery

To connect the 3.7V 2000mAh 18650 Li-Ion Battery, you'll need to attach it to a suitable charging circuit or a device that accepts 18650 batteries. Note that lithium-ion batteries require a protection circuit to prevent overcharge, over-discharge, and short circuits.

Code Examples

### Example 1: Arduino Sketch for Battery Monitoring

This example demonstrates how to use the 3.7V 2000mAh 18650 Li-Ion Battery with an Arduino board to monitor the battery voltage and capacity.

```cpp
const int batteryPin = A0;  // Select an analog input pin for battery voltage measurement

void setup() {
  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(batteryPin);
  float batteryVoltage = (sensorValue  5.0) / 1024.0;
  Serial.print("Battery Voltage: ");
  Serial.print(batteryVoltage);
  Serial.println(" V");

// Calculate battery capacity (assuming a full charge is 4.2V and empty is 3.0V)
  float batteryCapacity = ((batteryVoltage - 3.0) / 1.2)  100;
  Serial.print("Battery Capacity: ");
  Serial.print(batteryCapacity);
  Serial.println(" %");

delay(1000);
}
```

### Example 2: ESP32 Code for Battery-Powered IoT Device

This example demonstrates how to use the 3.7V 2000mAh 18650 Li-Ion Battery with an ESP32 board to power a battery-powered IoT device that sends data to a cloud service.

```cpp
#include <WiFi.h>
#include <HTTPClient.h>

const char ssid = "your_wifi_ssid";
const char password = "your_wifi_password";
const char contentType = "application/json";

WiFiClient client;
HTTPClient http;

void setup() {
  Serial.begin(115200);

WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

Serial.println("Connected to WiFi");
  Serial.println("Initializing HTTP client...");
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    http.begin("https://your-cloud-service.com/api/data");
    http.addHeader("Content-Type", contentType);

int batteryVoltage = readBatteryVoltage();  // Implement a function to read the battery voltage
    int batteryCapacity = calculateBatteryCapacity(batteryVoltage);  // Implement a function to calculate the battery capacity

String jsonData = "{""device_id"":""your_device_id"