If the BMS is not doing its job this test will damage the battery.The best is to discharge your battery pack and note at what voltage the BMS disconnects the load. Record individual cell voltages and you may find an individual cell that caused the disconnect. Repeat this for a charge cycle.
Obviously overseeing this process is mandatory.If the BMS is not doing its job this test will damage the battery.
Checking to see whether it is balancing should be relatively simple - just check out your cell voltages. If your BMS does not have any sort of display or bluetooth app, you might want to consider leaving a digital cell balancer attached to your battery (or at least have leave the leads attached) so that manual checking can be easily done at a glance.
Checking to see if the BMS will effectively prevent over and under voltage would be a bit more complicated, again assuming your BMS does not have its own display or bluetooth interface.
Which BMS is it?
Is it configurable or hard coded?Im using DALY 8S BMS 24 volts 100A on 24 volts Lithium 16 X 150 AH battery
It is hard coded and not configurableIs it configurable or hard coded?
If its hard coded look up the values and create test cases based on the values.
If its configurable, configure these values to safer values then test.
For instance set the per cell low cutoff of to 3.1 volts so that you can safely run a discharge and see if the protection circuit triggers at the expected value.
Cool look up the specs and devise tests.It is hard coded and not configurable
Im using DALY 8S BMS 24 volts 100A on 24 volts Lithium 16 X 150 AH battery
2P8S config with 1x 8s BMS — you have some testing to do ! Maybe test one string at a time.It is hard coded and not configurable
8S2P config with 1x 8s BMS — you have some testing to do !
Agreed. This is my ‘go to’ BMS for now.Also, just FYI: I recently installed three of the Overkill Solar BMS units which have bluetooth configuration and monitoring. It's an excellent product and totally worth the small premium over the daly, in my opinion. I love being able to see precisely what the BMS is doing in real time on my iphone.
Also, just FYI: I recently installed three of the Overkill Solar BMS units which have bluetooth configuration and monitoring. It's an excellent product and totally worth the small premium over the daly, in my opinion. I love being able to see precisely what the BMS is doing in real time on my iphone.
I have 3 of the 24v in parallel. I switched to this arrangement (8s3p) from my original 3p8s which had a 123smartbms. The new arrangement is sooo much better. My water heater used to cause like 2 volts of voltage sag and now it barely moves the needle.Also for the support and warranty. I am planning on this one as well...the 24 volt version.
Are you using three Overkill BMSs for the 8s3P? That could explained the no voltage dip.I have 3 of the 24v in parallel. I switched to this arrangement (8s3p) from my original 3p8s which had a 123smartbms. The new arrangement is sooo much better. My water heater used to cause like 2 volts of voltage sag and now it barely moves the needle.
I much prefer your new configuration - better cell / pack management overall.I have 3 of the 24v in parallel. I switched to this arrangement (8s3p) from my original 3p8s which had a 123smartbms. The new arrangement is sooo much better. My water heater used to cause like 2 volts of voltage sag and now it barely moves the needle.