BMS Design Architecture

[Vraj73IIITSURAT]

I had like to understand the recommended BMS configuration at the architecture level for both my current and future battery configurations.

1. 2S build

• Cell monitoring
• Passive cell balancing
• Battery protection
• SOC / SOH estimation
• Battery current measurement
• Pack/cell voltage measurement
• Battery charging
• Temperature monitoring

2. 7S build(future scalable)

• Same functional requirements as above
• Preferably using an architecture that can scale from 2S to 7S with minimum changes to the overall system

It would be particularly helpful if you could provide, for each configuration:

• Recommended cell-monitor/BMS IC
• Recommended protection IC
• Recommended charger IC
• Recommended current/voltage measurement approach
• Recommended SOC/SOH approach
• Recommended cell-balancing method and typical balancing current
• Whether you would use internal or external balancing FETs/resistors
• Any additional ICs/components you would normally consider essential

I’m mainly looking for a practical, industry-proven architecture rather than just a list of ICs. It would also be useful to know whether you would recommend one common architecture that can cover both 2S and 7S, or separate optimized configurations for each.

[Peter BENSCH]

Welcome ​@Vraj73IIITSURAT, to the community!

As you may have noticed, quite some time has passed without anyone responding to your request. This is probably because the request is too general to arouse enough interest from community members for them to reply.

If you have not already looked into it yourself in the meantime (e.g. on this website about balancing ICs), I recommend getting in touch with your local distributor and discussing the matter with them.

Good luck!

Regards
/Peter