Hi,
I'm trying to implement a automatic system to perform a learning cycle in batteries with the bq40z50r1.
- A power supply and load simulator are connected to the battery pack
- Two additional mechanical relays are connected to avoid any discharge to these devices (load, charger)
- A custom application is reading the voltage, battery, SOC and REST flag to enable/disable the devices (using a SMBus-USB adapter). The conditions to start/stop charging/discharging are based on Thomas suggestions (e2e.ti.com/.../1546915
The system and battery IC seems to work fine, however there is a condition I cannot understand [unexpected], as below:
- The battery is discharged (with termination voltage 9V),
- The load and charger are disconnected
- The REST flag is set
- The charger is connected
- [unexpected:] The charger current is zero (0) and the battery cannot be charge (after many hours). There is not pre-charger current.
At this point, I disconnect the SMBus port for troubleshooting using bqStudio (power connection is still present). Attached is the log, an screen shot and the srec. After read the srec, the charging start working.
I have a couple of questions:
- During this testing, which condition make disable the charger?
- Once the charger is disable, how to enable it again?
Thanks in advance,
Julio
log: 