Ebike Battery Repair BMS File Reset Online Service for Tuners and Owners

 Download a BMS reset file or send us your battery for repair.

If your e-bike suddenly won’t charge, turns off too quickly, or shows no power at all, the problem may not be the cells; it’s often the BMS (Battery Management System).

When the BMS malfunctions, your battery can appear “dead” even if the cells are still healthy.

We specialize in diagnosing, repairing, and resetting e-bike BMS boards so you can get back on the road without paying for an expensive new pack.

Keep reading to see how our service works and how we can help.

1. What is the BMS? 
2. What is the meaning of BMS Reset?
3. What are the bike battery common issues?
4. How to use ARMHEX BMS Reset Online Service ( for tuners & owners)?
5. How long does it take?
6. How much does it cost?
7. Guarantee and technical support

1. What is the BMS?

The Battery Management System (BMS) or Battery Pack Control Module (BPCM) is an essential ECU in modern vehicles, especially electric bikes (E-Bikes), that manages and monitors the performance of the battery.

It manages essential battery functions, such as monitoring voltage, temperature, current, state of charge (SoC), and cell balancing, in lithium-ion (Li-ion) LiFePO4 batteries. The voltage of these batteries can be different, like 48V, 16V, and 12V.

Its primary responsibilities include:

• Voltage, current, and temperature monitoring to ensure the battery operates within safe limits
• State of charge (SoC) management to accurately track the battery's remaining power
• Cell balancing to ensure each battery cell is evenly charged, optimizing performance and lifespan
• Protection against overcharging, overheating, or under-voltage events that could damage the battery or vehicle

The BMS also controls critical safety features, including shutting down or limiting power if it detects a fault or crash, sometimes preventing the vehicle from starting or charging. 

2. What is the Meaning of BMS Reset?

The BMS can trigger safety measures, like limiting charging or preventing the vehicle from starting, if it detects anomalies such as under-voltage, over-voltage, temperature issues, or crash impacts.

The BMS (Battery Management System) reset refers to restoring the BMS to its default or normal operating state after it has detected an issue, such as a fault, crash, impact, or battery-related error.

This process is done by programming the proper file, calibration, or software (dump) into the BMS memory, EEPROM, or MCU.

3. What are the EBike Battery Common Issues?

When the BMS/BPCM detects a battery issue, like low cell voltage, it triggers a safety mode that prevents the bike from starting or charging, even if the battery cells are good. 

Unfortunately, the unit continues to register the fault, often leading to costly replacements from the manufacturer. 

Resetting the BMS may be necessary when:

• The Battery won’t charge at all.
• Plug in the charger, but no response (usually BMS locked).
• The Battery turns off under load
• E-bike powers on, but cuts off quickly when you ride or use the throttle.

• Sudden drop from 2–3 bars to empty
• BMS is misreading the cell balance or shutting down early.
• Only charges halfway / doesn’t reach full voltage
• One or more cell groups are not balanced, BMS blocking full charge.

• No voltage at output terminals
• Safety MOSFETs on the BMS shut down or failed.
• Error codes on the display/controller are not recognizing the battery
• Communication fault between the BMS and controller.
• Over-discharge lock
• Battery drained too low, BMS latched into protection mode.

ARMHEX BMS Reset Online Service can clear these faults, restore normal operation, and allow the bike to function as intended without replacing the BMS unit.

4. How to Reset BMS after an accident or Discharge Using ARMHEX Online Service? (For Tuners)

At this moment, we only provide file (Firmware / Data) Reset, restore to the factory settings for BMS boards.

Using the ARMHEX battery BMS Reset online service is straightforward and works similarly to the BMS Reset Software and tool.

1. Choose or search your car brand and battery ECU number
2. Select your desired services
3. Upload battery ECU dump, D-Flash, or EEPROM
    
4. Download your repaired file right after payment if an automatic solution is available.
    
5. If a manual solution is required for your selected ECU, our expert team will modify your file after payment and submission. The repaired BMS file will be delivered via email or your preferred platform (e.g., WhatsApp) within minutes during working hours.
    
6. After processing, we’ll send you the modified file. Simply reflash it to your BMS memory chip to complete the reset.

5. How Long Does It Take?

Tuners:

1. Download your repaired file right after payment if an automatic solution is available. No waiting time!
    
2. If a manual solution is required for your selected ECU, our expert team will modify your file after payment and submission. The repaired BMS file will be delivered via email or your preferred platform (e.g., WhatsApp) within minutes during working hours. (Less than an hour)

Owners: 

At this moment, we don't accept batteries for repair, and our service is limited, and we provide service for technicians.

6. Pricing Information: How Much Does the BMS Reset Cost?

For Tuners: 

You can view approximate service prices on our Pricing page. For the exact cost, simply select your vehicle, BMS ECU part number, and the desired service, and the system will then display the final price.

The total price may vary based on several factors. New users receive a discount code, and the largest savings are reserved for VIP members.

Our VIP Plan includes:

• Priority file processing
• Exclusive discounts on future orders
• Access to special offers and promotions

Interested in becoming a VIP? Visit the pricing and plans page or contact us to learn more and unlock these benefits.

For Owners:

To get the exact price, please contact us. 

7. Guarantee and Technical Support

At ARMHEX Center, we are committed to delivering exceptional online services to tuners, owners, DIY, and automotive repair technicians and providing the fastest, highest-quality technical support. 

If you encounter any issues with your modified file or repaired ECU, we are dedicated to resolving them swiftly and effectively. Our support team can always address your concerns and offer assistance whenever needed.

We also offer a 100% Money-Back Guarantee if you are not satisfied with our service or the service, tuned, and repaired BMS ECU file (or BMS) does not meet the specified requirements, and our technical team cannot resolve the issue.

If the E-Bike model is not listed, or you have questions or concerns, please contact us via email or WhatsApp.

WhatsApp: +1 657 229 1838

Email: tuning.armhex@gmail.com

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