edit by request
Ok. It doesn't help that none of the parts are labeled in this section of the board.
Basically, from VCC there are SMD two resistors in series. After them, there is one SMD resistor that leads to the MCU and another SMD resistor that leads to ground. This last resistor is the one you need to remove and raise the value of. You can do this by replacing it with the appropriate SMD resistor, or by drilling a hole in the trace and attaching a regular resistor to it and to ground. In the pic above the hole is drilled on the left, and the resistor connects to a random pre-drilled hole that connects to ground on the right.
Drilling a hole in the trace is a bit of a pain though. Need a real small drill bit.
I ordered one of these on a lark while browsing alibaba. Unfortunately for me I don't actually have a 72v battery pack and this controller, to my knowledge, can't be reprogrammed to suit my needs. Because I can't test I'll just sell it as is, but I don't think you'll have a problem!
Oddly enough another got a batch of the same controllers as me at the same time! He is selling his for 80 pounds, which might be fair. I really have no idea what to price this at! Bmsbattery and evassemble sell a similar priced controller for $30, but with shipping and shipping times it's not even worth it.
decent coat of thermal paste
board and ic number. I can find absolutely no info about this online
not too shabby traces
Any one know what the numbers mean? 1.1-4.2v? Adjustable LVC? I might not sell it if I can get it to run on 48v