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Both figures are using modules or strings in parallel. The problem with parallel strings is controlling a runaway overcurrent situation in one parallel leg in the event of a Cell failure in the other leg. It could be done but will require separate contactors for each leg. In figure 1, a fail-over might require you to shut down the whole pack; in figure 2 you could theoretically shut down one leg and still use the other. It is not a trivial solution to design the system for either configuration, but figure 2 might be easier.
Tomdb of this forum has developed a board which can communicate with the original Tesla modules boards to provide Cell monitoring and balancer drive.
You will need a high level overall BMS to control all the parallel paths plus lower Cell-level monitoring.
What vehicle are you building?
Tomdb of this forum has developed a board which can communicate with the original Tesla modules boards to provide Cell monitoring and balancer drive.
You will need a high level overall BMS to control all the parallel paths plus lower Cell-level monitoring.
What vehicle are you building?