Battery Degradation Tracker Kit with Arduino Uno + LED
Battery Degradation Tracker Kit with Arduino Uno – Map SoH Curves Over Months
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Lithium-ion cells don’t fail overnight – they fade, cycle by cycle. This kit gives you a laboratory-grade tool to quantify that fade, continuously logging voltage and current under controlled discharge to calculate capacity and plot the State of Health (SoH) curve. Originally designed for research students and hackathon teams validating energy storage algorithms, it turns an Arduino Uno into a long-term battery analytics station.
What You'll Build
You’ll assemble a dual-channel battery cycler that runs timed discharge tests, measures precise current with ACS712 and voltage via dual INA219s behind an I2C multiplexer, then tags every data point with an RTC timestamp and writes it to a microSD card. The 0.96-inch OLED shows live capacity and SoH in percent. After repeated monthly cycles, you can pull the log files and plot the SoH degradation curve in any spreadsheet or analysis tool.
What You'll Learn
- How to derive battery capacity from coulomb counting using current integration
- Differential voltage sensing and the role of I2C multiplexing when two sensors share addresses
- Designing a constant-current discharge load with MOSFET switching and power resistors
- Implementing a real-time clock and SD card data logger for unattended multi-month tests
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| INA219 | 2 |
| ACS712 5A | 1 |
| TCA9548A I2C Mux | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| IRF540N MOSFET | 1 |
| TP4056 Module | 1 |
| 0.96in OLED | 1 |
| 10Ω 5W Resistors | 2 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This kit is built for B.Tech ECE/EEE students tackling power systems or energy storage thesis work, Smart India Hackathon participants designing battery management prototypes, and anyone in a research lab or ATL Tinkering Lab who needs repeatable SoH data. It assumes you already know basic Arduino programming and soldering, and want to move beyond simple voltage measurement to long-term analytics.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code to chat with the AI build companion, trained on this exact hardware. If you need a human, our WhatsApp support team responds within hours.
Can I test Li-ion cells of different capacities?
Yes, the discharge current is set by the 10Ω resistors – you can swap them to match your cell’s C-rate. The firmware walks you through calibrating the coulomb counter for any capacity.
How do I plot the SoH curve from the SD card data?
The AI companion includes a Python script that reads the CSV log and generates a matplotlib SoH vs. cycle number graph. Just plug the SD card into your laptop and run it.
What if I only have one battery to test?
The dual INA219 channels let you test two cells sequentially without re-wiring, but even a single-cell study over 3-4 months yields a clear degradation trend for your report.
Monthly capacity test cycles compared. INA219 and ACS712 measure capacity fade over time. Plots SoH curve.
What's in this kit
- Arduino Uno R3
- INA219 x2
- ACS712 5A
- TCA9548A I2C Mux
- DS3231 RTC
- MicroSD Module
- IRF540N MOSFET
- TP4056 Module
- 0.96in OLED
- 10Ω 5W Resistors x2
- 100nF Caps x10
- PCB Prototype Board x2
- Soldering Iron
- Solder Wire
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items