Electronics Projects

Have you ever thought about how you can easily keep track of the remaining capacity of your lead-acid batteries? Allow us to introduce the fascinating Lead Acid Battery Capacity Indicator - a revolutionary device created to unravel the complexities of battery power. Interested in understanding its functionality? Get ready to learn how batteries work and how to care for them. Let us find out how to ensure that our devices always have sufficient power!

Before this, we have learn about how to use Lithium battery Capacity Indicator Module.

Components Required

We have used an RPS here to verify the module’s results at different battery levels.

• 1 x Lead Acid Battery Capacity Indicator
• 1 x Redundant Power Supply (RPS)
• Crocodile Probes

Circuit Diagram

Pinout and Parts of the Lead Acid Battery Capacity Indicator

Specifications

Dimensions: 44.9 mm x 26.7 mm x 16.9 mm

Voltmeter Range: DC 12V – 60V

Working Current: 5mA – 15mA (can differ)

Let us discuss each component individually:

• Positive Terminal: The positive terminal of the battery is connected to the positive terminal of the module.
• Negative Terminal: The negative terminal of the battery is connected to the negative terminal of the module.
• LED: The module utilizes 7-segment LEDs to visually represent the voltage level of the connected battery.
• Battery Bar: The bar present on the module is used to represent the capacity of the connected battery. It has red and green LEDs to show the percentage of the connected battery. 

In subsequent sections, we shall gain insight into this concept through an example.

• DP 13003 Transistor: The DP13003 transistor is used in battery indicators for important purposes. It helps with switching operations to control the flow of current in the circuit, allowing for effective power management. Moreover, it can enhance signals, assisting in the precise measurement and monitoring of the battery's voltage. The DP13003 transistor is crucial for the overall functioning of battery indicators, guaranteeing dependable operation and accurate voltage detection.

• ADS 1115: The ADS1115 is frequently used as an analog-to-digital converter (ADC) IC in battery monitoring applications. It effectively converts the battery's analog voltage signal into a digital value with its high resolution and programmable gain amplifier. The ADS1115 communicates through the I2C interface and has low power consumption, which makes it ideal for battery-powered systems. When incorporated into a battery capacity indicator, it allows for precise measurement of the battery voltage and estimation of the remaining capacity, thereby improving overall monitoring accuracy.

Working of Battery Capacity Indicator Module

When the battery is connected to the module, it can detect the battery's range automatically, which enables it to display the capacity accurately through the battery bar. Different thresholds have been established for various percentages, and the bar indicates the capacity at 10%, 25%, 40%, 50%, 60%, 75%, 90%, and 100%.

The table above explains the bar indication for various percentages.

To understand it more clearly, I connected the indicator to a Redundant Power Supply and provided voltage ranging from 10V to 15V. Let us see the results in the following table:

These readings represent the capacity of a 12V battery. The module indicates a RED colour on the bar to indicate that the battery requires charging at a voltage level below 11.7V. As the voltage gradually increases, the GREEN bars illuminate, indicating the battery's percentage.

These readings represent the capacity of a 24V battery. The module indicates a RED colour on the bar to indicate that the battery requires charging at a voltage level below 22.5 V. As the voltage gradually increases, the GREEN bars illuminate, indicating the battery's percentage.

These readings represent the capacity of a 48 V battery. The module indicates a RED colour on the bar to indicate that the battery requires charging at a voltage level below 45.1 V. As the voltage gradually increases, the GREEN bars illuminate, indicating the battery's percentage.

These readings represent the capacity of a 48 V battery. The module indicates a RED colour on the bar to indicate that the battery requires charging at a voltage level below 56.2 V. As the voltage gradually increases, the GREEN bars illuminate, indicating the battery's percentage.

The correlation between LED and percentage can be comprehended by referring to the table explained in the previous section.

Conclusion

To sum up, the Lead Acid Red Digital Battery Capacity Indicator, which operates within the range of 12V-60V, is an invaluable device for keeping track of and evaluating the charge status of lead-acid batteries. With its accurate voltage measuring abilities and user-friendly interface, it offers users crucial details to efficiently handle their battery consumption.