BQ27542EVM: sohloadi setting

勇智王

Part Number: BQ27542EVM

Tool/software:

Dear sir
Regarding SOHLOADI, I did the following tests
SOHLOADI = -2000, after a complete discharge, SOH 100 >> 100
SOHLOADI = -7000, after a complete discharge, SOH 100 >> 93
SOHLOADI = -30000, after a complete discharge, SOH 100 >> 34

I understand that I should set my discharge current value
But I want to understand these differences

How should I understand the setting values here, and what values are affected

6 months ago

0 Alan Frias 6 months ago

TI__Mastermind 25225 points

Hello,

State of Health load I is used when the SOH is calculated, the FCC used in the calculation is a simulated value based on the temperature being 25 degrees and the SOH Load I, however has no effect on the actual gauging measurements being taken. The default value it is set at is -400mA and I've reference another E2E for it aswell.

Reference E2E:
https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1311763/bq27542evm-about-the-state-of-health-load-i-setting

Thank you,
Alan

0 勇智王 6 months ago in reply to Alan Frias

Prodigy 30 points

Please let me know in more detail

Why the larger the value I set, the faster the SOH drops

0 Alan Frias 5 months ago in reply to 勇智王

TI__Mastermind 25225 points

Hello,

SOH Load I has not effect on the actual gauging measurements being taken however the way that SOH Load I plays in the battery gauge is by taking the simulated FFC temperature at 25C and being divide by SOH Load I.

Thank you,
Alan

Power management

Power management forum

BQ27542EVM: sohloadi setting