meetyg
Solar Enthusiast
- Joined
- Jun 4, 2021
- Messages
- 1,071
Hi.
I recently noticed some strange behavior on one of my DIY Lifepo4 batteries, using a 4S JBD:
When charge and discharge are enabled, I get the correct voltage at the terminals (using a DMM) as the BMS app states. But when charge is disabled, there is less voltage on the terminals (around half a volt less).
I went back to check two other 12v Lifepo4 batteries of mine (also with JBD BMSs, but different models) and the same behavior happens.
I wonder why this happens ?
Do other "smart" BMSs behave this way?
It may not be that critical, but it could confuse some SCCs or other peripherals connected to battery, that measure its voltage.
Having charge disabled could be intended, or may happen as the BMS decides it should (like overvoltage or overcurrent).
Is there a setting to change this behavior?
Has anyone else noticed this?
Thanks
I recently noticed some strange behavior on one of my DIY Lifepo4 batteries, using a 4S JBD:
When charge and discharge are enabled, I get the correct voltage at the terminals (using a DMM) as the BMS app states. But when charge is disabled, there is less voltage on the terminals (around half a volt less).
I went back to check two other 12v Lifepo4 batteries of mine (also with JBD BMSs, but different models) and the same behavior happens.
I wonder why this happens ?
Do other "smart" BMSs behave this way?
It may not be that critical, but it could confuse some SCCs or other peripherals connected to battery, that measure its voltage.
Having charge disabled could be intended, or may happen as the BMS decides it should (like overvoltage or overcurrent).
Is there a setting to change this behavior?
Has anyone else noticed this?
Thanks