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Need BMS for large battery

Hi,
We have this new product which is a mobile car charge station. It has a large battery pack (48V, 340Ah, 0.25C-0.5C discharge rate). We need a BMS for this battery. 
Since its a big battery pack, we probably need a central BMU and several battery supervise unit (BSU) go with it.
Do you know any products meet our requirement? Or maybe design a chip for our battery?
Please let me know. Thanks
Alex