Dear Friends,We are planning to make 18 cells BMS with bidirectional active balancer. In order to that we are considering LTC6813-1 as 18 cell battery stack monitoring and LTC3300-1 x3 for link with active balancer. I have a few questions to clarify.Q1 which is the best way to setup ISP communication with MCU? A) using two separate isolator with setup1 or single isolator with setup2
Q2 In the LTC3300-1 WDT protection circuit how to connect with cells and interface when using three cascade ICs? (DEMO CIRCUIT 2100 only use 2 chips ) could you please provide sample diagram for thisQ3 We have seen LT2949 current Measurement Chip, in the BMS category front page, but unable to find this chip any detail ? (do you have any suggestion chip for 18cell current measurement chip (shunt resistor - 250A)Thank you!
Concerning the setups:
For the protection circuits extension to 3 ea. LTC3300, see the attachment.PDF
The LTC2949 is not a released product, so there is no public information available.
I have corrected my original diagram in my original reply (9 August), and I am posting it here as well.
Dear WA TaylorThank you so much for your information. By the way I'm still seeking suitable zero drifting, bidirectional current shunt monitoring chip for the 18 cells application. could you please any suggestions for that? Because I couldn't find the suitable current shunt monitoring chip withstanding to common mode voltage is grater than 90V. Appreciate your any suggestions.Cheers!
LTC6813(Slave) - Will communicate with RL78/F14(master) (Renesas controller, which has CSI(clocked serial interface ).