Had the chance to interact with an expert on BMS. Sharing some high level takeaways.
Most have been covered before in this thread, past work has been incredible. Thanks to every single person who helped solve a piece of the puzzle.
- On the Hall effect sensor vs shunt questions – Hall effect sensors are used when the amperage is high.
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Designer of the shunts are crucial, as a badly made shunt is inaccurate. Shunts have a low ohmic usage, low energy loss, smaller size and better accuracy.
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Different alloys of these shunts lead to different performance at various wattages, different profiles of resistance with change in temperature, etc. Further work for me: look into whether different alloys allow higher and higher current usage, etc.
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Shunts are cheaper than Hall effect sensors, and Vishay’s shunts are the cheapest on the market.
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Post from a few years ago was spot on based on the conversation:
- A single BMS uses between 4-6 shunts, the higher the amperage, the more the shunts used.
Disclosure: invested, biased. No transactions in the last 30 days.
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