Battery Renew Re-Celling Refurbish Repair SERVICE for Lithium Iron Battery Packs

Tools and Equipment We Use

• Multimeter -  To measure voltage and resistance.

• Battery Analyzer/Tester: To measure the capacity and load of the battery.

• Balance Charger: For testing and balancing cells if necessary.

• Thermal Camera: To detect any hotspots in the cells.

• Logging Software: To track and analyze data.

Testing procedure

Step 1: Measure Total Battery Voltage

• Using a multimeter we measure the overall voltage of the battery pack.

• Compare it to the rated voltage to ensure the battery is within an acceptable range.

Step 2: Check Individual Cell Voltages

• We open the battery casing (if safe and permissible) or access the balance leads.

• We measure the voltage of each cell or cell bank using the multimeter.

• Record the readings for each cell.

Step 3: Calculate Cell Differences

• We Identify the highest and lowest cell voltages from your readings.

• Subtract the lowest voltage from the highest to determine the cell difference.

• Example: If Cell 1 is 4.2V and Cell 2 is 4.0V, the difference is 0.2V.

• A difference greater than 0.1-0.2V may indicate imbalance or issues.

Step 4: Test Cell Bank Capacity

• Fully charge the battery banks using a balance charger.

• Discharge the battery bank using a battery tester/analyzer at the rated current.

• Measure the capacity (in mAh or Ah) of each cell bank during discharge.

• Compare the measured capacities to the manufacturer’s specifications.

Step 5: Identify Capacity Disparities

• Note any cell bank that has significantly lower capacity than others.

• Lower capacity indicates potential cell degradation or failure.

Step 6: Test for Internal Resistance

• Using a battery internal resistance tester we measure the resistance of each cell.

• Higher internal resistance in a cell can indicate aging or damage.
  
  

Check for Temperature Variance

• Monitor the temperature of each cell during charging/discharging using a thermal camera..

• Uneven temperatures or over heating might indicate an issue such as overloading or internal damage.

Interpreting Results

• Healthy Cells: Voltage differences under 0.1V and capacities close to the rated values.

• Imbalance: Voltage differences over 0.2V; consider balancing the cells using a balance charger.

• Degraded Cells: Significant capacity loss or high internal resistance; these cells may need replacement.

Why You Should Trust Us with Your Repair

At iTechFixit we pride ourselves on providing reliable and professional repair services. Here are the key reasons why you can trust us with your repair:

• Our team consists of skilled technicians with years of experience in repairing a wide range of devices and battery systems.
• We stay updated with the latest technologies and repair techniques to ensure the best results.
  
  Quality Assurance

• Each repair undergoes thorough testing, including capacity and performance checks, to guarantee functionality.

• We use high-quality components and tools for all repairs, ensuring durability and performance.
  
  Advanced Methods

• We utilize advanced diagnostic tools, including thermal imaging, to accurately identify issues.

• Our re-celling process involves spot welding, which is safer and more reliable than soldering, preserving the integrity of the cells.

• Replacement cells are capacity and resistance matched to extend the life of your battery and BMS
  
  Transparent Process

• We provide clear and upfront quotes after diagnosing your device, with no hidden costs.

• If you decide not to proceed with the repair, we’ll return your item at no additional charge.
  
  Customer-Centric Approach

• We prioritize your satisfaction and aim to restore your device to optimal condition as quickly as possible.

• Our typical turnaround time is 5 to 10 working days, ensuring efficient service without compromising quality.
  
  Warranty Coverage

• All repairs come with a 60-day warranty, giving you peace of mind that your device is in safe hands.

Trust us to handle your repair with the care and professionalism it deserves. Your satisfaction and the performance of your device are our top priorities.

Once you place the order, please mail in or drop off your battery (including the battery pack and charger) at our workshop. A link to the repair form will be sent to you, which should be enclosed with your battery. This form includes recommendations for suitable couriers and instructions on how to safely pack your battery.

Once we receive the battery, we will diagnose the issue and provide a quote for refurbishment. If you agree to the quoted price, we will proceed with the repair, and the diagnostic fee will be deducted from the repair cost. If you decide not to proceed, we will return your battery at our expense with no additional charges.

Any re-celling will be performed using spot welding, unlike some other repairers who solder cells, which can damage them. Additionally, any replacement cells will be capacity and resistance matched to the existing cells, ensuring the longevity of the BMS. The BMS will be thoroughly tested and replaced if necessary. We also use thermal imaging to identify and address any overheating cells. Once repaired, the battery will be rebuilt and capacity tested.

The typical turnaround time is approximately 5 to 10 working days from the time we receive your battery. This allows adequate time for diagnosis, repair, testing, and delivery, depending on the severity of the fault.