What is the difference between the AFE module in the automotive BMS and the general metering chip?

fhymz

What is the difference between the AFE module in the automotive BMS and the general metering chip? [Copy link]

I would like to ask everyone on the forum, generally automotive BMS is composed of AFE+MCU+other communication modules. I would like to ask why BMS does not use the existing energy metering chip but uses AFE?

xutong

I want to know too.

qwqwqw2088

Simply put, electric vehicle batteries are in multiple groups, that is, multiple parallel and multiple strings, which need to be balanced, and the balancing circuit needs to be monitored and controlled.

AFE is the analog front-end chip mentioned by the original poster, or in BMS, it refers to the battery sampling chip. This thing can meet the requirements and can also monitor the battery temperature and voltage, etc.

qwqwqw2088

Question sharing: What is the difference between AFE and battery monitor in battery management chip?

https://bbs.eeworld.com.cn/thread-1127879-1-1.html

littleshrimp

What are the existing energy metering chips? First, we need to determine whether it meets the relevant standards and has high requirements for measurement accuracy. Other requirements include high voltage isolation and communication.