Many people's eyes are focused on IGBTs. Power devices are expensive and indeed difficult to do. But if something goes wrong and the ADC's analog chip is removed, our battery management system will have no roots.
Insert a sentence: I know two chip companies, want to do this AFE, the first long time ago mentioned that the project behind the dismount; another sister's project, in the end what kind of interest, then you can talk to her to see.
As follows, a certain car IGBT is its own, AFE battery front-end acquisition chip?
Analog front-end acquisition chip: Mainly used for multi-channel chip acquisition of the cell voltage
The most expensive thing here is this BMIC.
I probably did a sort of combing. At present, there are three mainstream domestic companies. LT, Maxim, and TI are all companies in the United States.
In conjunction with Davide Andrea's update made in March 2018, starting in 2013, he also made some recommendations regarding the use of AFE.
Monolithic acquisition channel
In the long run, the external ratio is the number of channels, area and cost, and the ratio is more stable.
In the different channels and acquisition performance (voltage acquisition error, speed, leakage current), each chip company in the analog acquisition and processing here is still a big difference.
This AFE is essentially the earliest, A123 engineer
Without an integrated solution, you can only return to design a complete circuit
If something really happened, it really came back.
If you rely on the current circuit for functional safety, this workload will not be great. The chip will do a lot of our work, and it also solves a considerable part of the system stability and functional safety issues at the chip level. Many of BMS's things are solved by BMIC.
Summary: To be realistic, in the short term, it is difficult for us to separate these chips from on-board applications, and it is difficult to replace them with domestic chips. Equivalent domestic chips, either first used in energy storage (small energy storage) first, to a certain amount of application, to solve the problem of the stability of the chip again, in fact, this BMIC is connected to the battery, there is a large number of surge pulses The problem is that the front-end design is not good, the pressure behind the chip is not small, plus the problem of common-mode voltage and power-on working time, this chip actually has no lower requirements for materials and design. Struggling again, in the short term, it is still necessary to use, but it is necessary to dig deeper. If there is a problem, call them FAE and challenge them at the chip level. ^_^
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