BQ27520-G4: Effects of differences between battery cells and battery packs

Part Number: BQ27520-G4
Other Parts Discussed in Thread: GPCCHEM

Tool/software:

Dear Sirs and Madams,

Is the ChemID=7661 registered in bqStuio a property of cell only?


"Panasonic , UF463443GUM (820mAh), 7661, LiMn2O4 (CoNi)/carbon, 4.2V"

The battery we are considering is a battery pack equipped with UF463443GUM (820mAh).

This ChemID=7661 was also selected in the GPCCHEM report.

When I set ChemID=7661 and ran the learning cycle, the Update Status became 02 and the Ra Tables were updated without any problems.

/******************************************/

Design Capacity : 820mAh

Charge current : 410mA (C/2)

Tabper current : 40mA

Discharge current : 110mA (C/7.5)

Full charege voltage : 4200mV

Term voltage : 3200mV

/******************************************/

However, the SOH is low at 94% or 95%.

Do you think this drop in SOH is due to the impedance of the battery pack's protection circuit?

In this case, is there any workaround other than sending this battery pack to your company and having a new ChemID created?

Regards,

Masashi