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How to recover a Laptop Battery Fuse 3 pins type

tapasloveu
(@tapasloveu)
Trusted Member Customer

how to jumper this fuse (buypass)

IMG 20210420 023644
This topic was modified 1 month ago by Nicusor
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Topic starter Posted : 19/04/2021 9:08 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

Put U-shaped soldering wire on the parallel legs, they are used for power line conducting. Be carefull not to touch with this jumper a third control legs, which is connected to heater MOSFET, as it could be damaged.

Here is an example of restored fuse.

 

 IMG a58987d00e82ec0c9c7a0e80e67a2d5d V
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Posted : 20/04/2021 8:01 am
tapasloveu
(@tapasloveu)
Trusted Member Customer

sir why u shape plz explain why not just ---

  2 and 3

means like minus 

 

 

 

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Topic starter Posted : 20/04/2021 6:24 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

U-shaped form located above main MOSFETs will have more chances to be melted in case of overcurrent or short-circuit events in comparison with straightforward form, thus provide more protection to the pack.

 

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Posted : 20/04/2021 9:02 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

For fuses of rectangular type like 12AH3 recovery tutorial is here.

https://www.laptopu.ro/community/laptop-battery-chip-reset-and-repair/battery-fuse-replacement

 

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Posted : 14/09/2021 8:36 pm
torture
(@torture)
Member Moderator

Alternative method for 3 legs fuse restoration that i use every time.

Unsolder the fuse from pcb.

Flip it and remove the cap.

S20210925 0001

 

 

 

The original fuse looks like this

 

SingleShot0000

 

 

When blown looks like this.

S20210926 0001

 

 

Restore the blown fuse by a drop of solder. I always use low melt solder, if you don't have it use regular 60/40.

S20210926 0002

 

 

If the chip decides to blow the fuse again there will be absolutely no problem.

S20210926 0003

 

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Posted : 25/09/2021 9:37 pm
torture
(@torture)
Member Moderator

Here is another type of 3 legs fuse but with a different configuration.

It's used mostly on Lenovo Sanyo but can be found also on some other PCB.

Pay attention to the power contact legs.

S20210926 0001
S20210926 0002

 

20210926 122814
20210926 122914

 

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Posted : 26/09/2021 10:00 am
batFix
(@batfix)
Reputable Member

Ohms ?

Lets Make NLBA Great ! Together.

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Posted : 26/09/2021 2:39 pm
Nicusor
(@azzido)
Member Admin

@torture 

Thanks for sharing the info.

NLBA Laptop Battery Analyzer with Chip Reset & Repair Option

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Posted : 27/09/2021 7:39 am
torture liked
torture
(@torture)
Member Moderator
Posted by: @batfix

Ohms ?

Yes.

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Posted : 27/09/2021 8:10 am
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