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Lenovo LNV-42T4977 BQ20895 FW V0.11, unable to read eeprom

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FJ
 FJ
(@brs)
Noble Member Customer
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Topic starter Posted : 21/11/2023 4:03 pm
FJ
 FJ
(@brs)
Noble Member Customer

chip is unsealed but unable to read eeprom. how to read/save?

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Topic starter Posted : 21/11/2023 4:04 pm
FJ
 FJ
(@brs)
Noble Member Customer
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probably chip is not unsealed

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Topic starter Posted : 21/11/2023 4:08 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 This chip was added to supported list by mistake. It is actually not supported. 

 

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Posted : 21/11/2023 5:08 pm
torture
(@torture)
Member Moderator
Posted by: @brs

probably chip is not unsealed

Correct.

SS bit is still active.

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Posted : 21/11/2023 5:12 pm
FJ liked
FJ
 FJ
(@brs)
Noble Member Customer

is it possible to unseal/reprogram remotely?

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Topic starter Posted : 22/11/2023 4:45 am
FJ
 FJ
(@brs)
Noble Member Customer

just need to adjust the CC.

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Topic starter Posted : 22/11/2023 4:45 am
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 You could try unseal over Remote Server. 

 

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Posted : 22/11/2023 11:56 am
FJ
 FJ
(@brs)
Noble Member Customer
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after 1 full charge, v.big imbalance appeared

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Topic starter Posted : 22/11/2023 2:32 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

Measure each cell with multimeter. 

 

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Posted : 22/11/2023 2:34 pm
FJ
 FJ
(@brs)
Noble Member Customer
image

is it because of cells resistance difference?

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Topic starter Posted : 22/11/2023 2:53 pm
FJ
 FJ
(@brs)
Noble Member Customer
Posted by: @djibattworkshop

Measure each cell with multimeter.

actual voltages are same

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Topic starter Posted : 22/11/2023 3:03 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 Try the following. Balance the cells, charge the battery to full. Balance the cells. Then run one full discharge / charge cycle. If imbalance will be over 50mV cells should be considered to replace. 

 

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Posted : 22/11/2023 3:24 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @brs

actual voltages are same

 Do you mean all cells voltages are equal and the same or cells voltages measured are the same like on BatInfo tab picture ?.. 

 

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Posted : 22/11/2023 3:27 pm
FJ
 FJ
(@brs)
Noble Member Customer
Posted by: @djibattworkshop

 Do you mean all cells voltages are equal and the same or cells voltages measured are the same like on BatInfo tab picture ?.

mean voltages are as on Batinfo tab. they match exactly

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Topic starter Posted : 22/11/2023 3:46 pm
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