14-03-2019, 19:55
Hi Colin,
great job, you have a nice battery assembled.
The good 18650 Molicells
As hornychz I would recommend to add some protective devices. State of the art, as posted for example in the IEC 62133:2017, contains the following:
This is only a basic information and guideline - the whole standard demands much more.
If you need additional advice, just let me know.
And be careful, flying and red glowing cell cans can be nasty - I'm not joking in this case
Best regards,
engolling
great job, you have a nice battery assembled.
The good 18650 Molicells
As hornychz I would recommend to add some protective devices. State of the art, as posted for example in the IEC 62133:2017, contains the following:
- Overcharge and overdischarge protection of the whole battery - should be active under 3*2,5V and above 3*4,20V in your case.
- Overcharge and overdischarge protection of each parallel branch, otherwise in case of a disbalancing one parallel string could be overcharged or overdischarged
- Overcurrent protection in charging and discharging protection
- Temperature protection, in your case at least two temperature sensors on the cells would be appropriate
- Balancing circuit to ensure long lasting performance, otherwise the usable capacity will be reduced very quickly
This is only a basic information and guideline - the whole standard demands much more. If you need additional advice, just let me know.
And be careful, flying and red glowing cell cans can be nasty - I'm not joking in this case
Best regards,
engolling