Dear all,
we designed a Li-Ion battery pack, 10s2p, with 18650 cells.
We are using BQ78350-R2 and BQ76930.
Concerning the BQ78350, is there any "Data Flash File" as template?
I mean, a list of tipical values for XXsYYp Li-Ion battery.
Then we are going to adjust some values to fit our design.
For instance, what is the right value for "COV" and "AFE SOV" for a typical Li-Ion 18650 cell ?
Many thanks for your support. Regards.
Devis
Dear Matt,
thanks for your reply.
Are you sure the default values are typical for a Li-Ion ?
The "BQ78350 Technical Reference" states:
3.3 Cell Overvoltage Protection
The device can detect cell overvoltage in batteries and protect cells from damage by preventing further
charging.
Usually the Li-Ion cell datasheet defines 4.20 V as max voltage (only few times they define the overvoltage protection value).
A third-party laboratory is testing our battery samples.
On the charging test (with higer voltage to simulate a fault charger), they verify that cells must be equal or lower than the max voltage defined on the datasheet (usually 4.20 V, sometimes 4.25 V).
For this reason we are evaluating to modify COV from 4.30 to 4.25 or 4.20 V. ... but we are looking for any suggestions.
Thanks. Bye.
Devis
