Notifications
Clear all

[Solved] Unable to update charging current of Dell T54FJ with BQ8055 6-Cell chip

Page 1 / 2
Habib Ullah
(@sajid)
Reputable Member Customer

New Cells replaced with old cells now I want to change the charging current in the following dump file. @torture @djibattworkshop kindly help me in this problem.

image
image
ReplyQuote
Topic starter Posted : 21/09/2023 2:13 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

Chip is locked, thats why Charging Current is zero. First of all check and recover the fuse. Then press Clear Chip Errors button to unlock the chip. 

 

ReplyQuote
Posted : 21/09/2023 3:29 pm
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop I did many time after succesfull message chip still locked fuse is also well soldered and checked by multimeter

ReplyQuote
Topic starter Posted : 21/09/2023 3:36 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

Paste picture of the fuse. 

 

ReplyQuote
Posted : 21/09/2023 3:42 pm
Habib Ullah
(@sajid)
Reputable Member Customer
WhatsApp Image 2023 09 21 at 8.45.18 PM
ReplyQuote
Topic starter Posted : 21/09/2023 3:45 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 It was discussed in tutorial to not touch control pin of the fuse. Otherwise fuse control mosfet could be damaged. In this case chip could not be unlocked. Because chip checks fuse control circuit. 

 

ReplyQuote
Posted : 21/09/2023 3:51 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 Check this tutorial how to recover this type of fuse. 

https://www.laptopu.ro/community/how-to-reset-and-repair-laptop-battery-tutorial/how-to-jumper-this-fuse/  

 

ReplyQuote
Posted : 21/09/2023 3:52 pm
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop send me the link

 

ReplyQuote
Topic starter Posted : 21/09/2023 3:53 pm
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop got it

ReplyQuote
Topic starter Posted : 21/09/2023 3:54 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

Only power feeder pins should be connected by a jumper. Control pin should never be touched with it. 

 

ReplyQuote
Posted : 21/09/2023 3:55 pm
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop Solved thanks

ReplyQuote
Topic starter Posted : 21/09/2023 4:03 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

Feel free to paste updated snapshot. 

 

ReplyQuote
Posted : 21/09/2023 5:32 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @sajid

New Cells replaced

have you installed 4.20 or 4.35 type of cells ?.. 

 

ReplyQuote
Posted : 21/09/2023 5:34 pm
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop 4.2v cells 

ReplyQuote
Topic starter Posted : 22/09/2023 4:29 am
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

Have you checked original cells type before rebuilding the battery ?..

It uses LiHv 4.35v type of cells. Check Charge Voltage parameter. 

IMG 20230922 103456

Standard 4.20v cells will be overcharged beyond safe limits and degrade its capacity fast. Consider installing 4.30 or 4.35v type of cells. 

 

ReplyQuote
Posted : 22/09/2023 7:37 am
Page 1 / 2
Share: