Battery with overcooled error message

[Anzacjack]

I would be pursuing that warranty mate. Its obviously a known fault with multiple instances and if i had it on a new bttery i would accept the bad luck story from autel

 

[Dronesolutionsja]

I would be pursuing that warranty mate. Its obviously a known fault with multiple instances and if i had it on a new bttery i would accept the bad luck story from autel

well they say they dont know anything about that error message.

Infact they dont even know what that error message is.

I guess three months after purchase my battery is out of warranty.

Thats the service offered from the great Autel Robotics

 

[Detritalgeo]

seems like the temperature sensing thermistor is bad

 

[Dronesolutionsja]

The funny thing is i've fixed the fault myself.

 

[Anzacjack]

The funny thing is i've fixed the fault myself.

How. Please share

 

[Anzacjack]

The funny thing is i've fixed the fault myself.

Doesnt seem like your willing to share your "fix".
Im a little disappointed but to each to their own, i guess

 

[Dronesolutionsja]

Change the battery thermal sensor.

 

[Anzacjack]

do you have a pic? Where did you get the thermal sensor. I have inquired but not been able to source one

 

[Dronesolutionsja]

Thermal sensor was taken from a DJI battery. Will post a pic in a few.

 

[Dronesolutionsja]

Thermal Sensor

 

[Anzacjack]

Ahhhh. Interesting. What type of dji battery did you use
I may be able to do the same. Where was the sensor located?

Thanks for sharing

 

[Anzacjack]

Looking at this teardown video, the sensor does not seem apparent. Is it under the circuit board?

 

[Dronesolutionsja]

Ahhhh. Interesting. What type of dji battery did you use
I may be able to do the same. Where was the sensor located?

Thanks for sharing

its located on the battery cells with some paste. mavic pro series.

 

[Anzacjack]

so i pulled the temp sensor up out of the cells of the autel battery. Saw that it was just a little bulb coated in white plastic. After repostioning it, i just wanted to double check the battery and it is now working fine. Have not had to replace the sensor. Although i now know that it can be done easily. Ill keep that battery for ground checks and updates etc.

Thanks for your information Dronesolutionsja

 

[Dronesolutionsja]

so i pulled the temp sensor up out of the cells of the autel battery. Saw that it was just a little bulb coated in white plastic. After repostioning it, i just wanted to double check the battery and it is now working fine. Have not had to replace the sensor. Although i now know that it can be done easily. Ill keep that battery for ground checks and updates etc.

Thanks for your information Dronesolutionsja

No problem Anzacjack

 

[Dronesolutionsja]

I have just received à new battery, it is at 50% charge but once I plug it to the charger I have the second led flashing assuming à temperarure issue and once pluged in thé aircraft the system shows an error.

Any idea How to solve this ?

Thks

Hh

Change the thermostat in the battery casing. Use one from an old drone battery.

 

[Dronesolutionsja]

Looking at this teardown video, the sensor does not seem apparent. Is it under the circuit board?

its resting on the battery itself with some form of paste

 

[Dronesolutionsja]

Battery wont charge.

No fix for it. Autel advice is to purchase a new battery.

I fixed mine and Autel finally sent me a replacement for my troubles. Thanks Autel.

 

[Dronesolutionsja]

I suggest you get your battery exchanged. Clearly the sensor of that battery is busted or stuck.

They replaced my batteries a few weeks after.

 

[Detritalgeo]

yes, it was the NTC thermistor that failed... it is a temperature sensitive resistor found on all (reputable) lithium ion battery packs to shut the battery when temperature is excessive, mostly during charging. The voltage across the thermistor is dependent on the temperature so the software reads the voltage and translates that to temperature. As mentioned above the thermistor failed in your battery so the incorrect (voltage) temperature was being registered. Changing it out is a very easy fix to try.. you can easily tert them with a multimeter by reading the voltage when cold and warm.

I actually had one of my Mavic Air batteries fail after one of the thermistor leads broke off the BMS board.. The DJI Go4 app refused to fly because it could not get the temperature reading. I soldered up the broken lead and everything was normal.

Thermistor - Wikipedia

en.wikipedia.org