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News Alert: DJI issues Firmware Updates for problematic TB50/TB55 Batteries

DJI release firmware update for TB50 and TB55 batteries

News Alert: DJI issues Firmware Updates for problematic TB50/TB55 Batteries

Following the recent concerns surrounding the operational safety of the TB50 and TB55 intelligent flight batteries for DJI Inspire 2 and DJI Matrice 200 Series, the manufacturer has now released Firmware Updates for their customers.

DJI took immediate action following the small number of reported issues, with a full investigation being launched to identify and resolve problems found with the battery state of charge (SOC) calculation algorithm. The manufacturer has made it clear that this is a ‘rare issue’ and that they have added “measures in the flight controller to help bolster flight safety and product reliability which are DJI’s top priorities. Customers are strongly advised to update their DJI GO and DJI Pilot apps, though app upgrades are not mandatory.”

The main points are as follows:

For TB55 batteries used with the M200 series drone, the firmware update will impose these new battery safeguards:

Battery temperature detection before take-off

The battery temperature will have to be 15°C or higher before the aircraft can take off. This is because a battery with low temperature has a larger internal resistance, which causes lower voltage than in normal conditions. A battery with low voltage will have a low SOC (state of charge) value.

SOC (state of charge) detection before take-off

The voltage of the battery will be used to verify the SOC value by the DJI algorithm in the new firmware. This SOC value will be compared to the one calculated by the battery SOC calculation algorithm to determine if there is a false high SOC reading. If there is a false high SOC reading, then the aircraft will not be able to take off.

Return-to-Home (RTH) or Automatic Landing

When the DJI algorithm detects a difference in SOC levels between the algorithm and the actual level that is greater than 5%, RTH (return-to-home) will be activated at a detected battery level of 30% and automatic landing activated at 10% (based on the DJI algorithm). If the difference is less than 5% then no action will be activated.

For TB50 batteries used with the M200 series drone, the firmware update will impose this new battery safeguard:

Battery temperature detection before take-off

The battery temperature will have to be 15°C or higher before the aircraft can take off. This is because a battery with low temperature has a larger internal resistance, which causes lower voltage than in normal conditions. A battery with low voltage will have a low SOC (state of charge) value.

All DJI users are strongly urged to immediately update their firmware to include the latest safety feature improvements, whether through the flight control App or the DJI Assistant 2 program. Please allow extra time before your next flight to perform this update.

Please note:

For the time being, pilots who are using drones of both the DJI M200 series and the DJI Inspire 2 may receive an “inconsistent firmware” notification when using batteries updated with different firmware versions. This may lock the drone so DJI advises that pilots use batteries upgraded with the same firmware until a new firmware update is pushed out in December. This update will solve this compatibility issue in addition to improving overall user experience.

DJI is working on further updates to be issued shortly to further enhance safety measures. If you believe you may have experienced a related power problem involving the TB50 or TB55 battery, please contact DJI customer service at dji.com/support to report the issue.

The CAA recently released Safety Notice SN-2018/10 to all Small Unmanned Aircraft (SUA) Operators in the UK, which reviewed the previously imposed restrictions. More information can be found here.

Following the new firmware update release from DJI, it is likely the CAA are reviewing the case and will release a new Safety Notice soon. Stay tuned for updates!

Source: https://www.dji.com/newsroom/news/dji-issues-firmware-updates-for-tb50-and-tb55-batteries

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