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Apple A2141 battery problem


servisreworksystem
(@servisreworksystem)
Active Member Customer
Joined: 5 months ago
Posts: 8
Topic starter  
When the battery was first connected, the cells were not ballasted and the chip was bq20z451.

After balancing the cell does not see the chip.
What did i do wrong, how do i recover the chip.
Thanks in advice

image

 

 
 
Икона Потврдила је заједница
 

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servisreworksystem
(@servisreworksystem)
Active Member Customer
Joined: 5 months ago
Posts: 8
Topic starter  
image

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DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Joined: 2 years ago
Posts: 1776
 

Balancing should be done very carefully to not touch any sensitive components on the boards. Otherwise pcb could get damaged. 

Try to wake-up the chip by pressing Power On button. 


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servisreworksystem
(@servisreworksystem)
Active Member Customer
Joined: 5 months ago
Posts: 8
Topic starter  

@djibattworkshop 

I tried that, it doesn't work. I was very careful when charging the batteries with the lab power supply. Is there an smb command i could try?

Thanks


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DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Joined: 2 years ago
Posts: 1776
 

You could try any SBS command. This is what Nlba1 does in background when someone press Read button. 

 Me recommend you to check communication port of battery using multimeter in diode test mode. Red probe is on ground. 

 


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