DJI has issued firmware updates for users of TB50
batteries, after a small number had reported incorrect power levels.
The updates will enhance the battery-management system and optimize power supply during flight. Pilots are encouraged to check their DJI Pilot app or DJI GO 4 app and update the firmware on their batteries as soon as possible.
Last month, there were reports that a small number of these batteries had shown incorrect power levels, leading to loss of power mid-flight. Customers were urged to fly with caution when using TB50 and TB55 batteries in drones. Last week, DJI said that it was not shying away from the issue and was working round the clock to find a solution to the recent issues
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A TB55 battery.[/caption]
The firmware update addresses what DJI says is 'a rare issue involving the battery state of charge (SOC) calculation algorithm'.
The following measures have been added to the flight controller to help bolster flight safety and product reliability, which DJI says are its top priorities.
1: 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 value.
2: SOC 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.
3: Return-to-Home (RTH) or Landing in advance
When the DJI algorithm detects a difference in SOC levels between the algorithm and the actual level that is greater than 5%, RTH 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.
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A TB50 battery.[/caption]
A DJI statement says: "DJI conducted extensive tests to verify these new measures. 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. The DJI Pilot app will prompt users to update, and the DJI GO 4 app will not allow flight until the update is performed."
If you believe you may have experienced a related power problem involving the TB50 or TB55 battery, contact DJI customer service at dji.com/support
to report the issue.