Depends on the nature of the problem, which you haven't told us much about.
For a variety of reasons that depend on the specific application. The analog world is pretty big and the application range of opamps is about just as wide.
Because you never gave us much information to go on.
Please share a schematic of your setup that includes the array of batteries.
The image doesn't even begin to describe how it's done in that system. However, it's correct that many BMS's have individual cell monitoring using differential amplifiers.
Yes but remember you have to use two of these to make a duel pole change over switch. And also arrange complementary drivers for them.
No, using FET output opto couplers. The complementary output drivers can use bi-polar transistors if you like.
Yes but you need one of these for each battery you want to measure, and the resolution of each reading will drops each of the potential divider's division ratio.
Also having a clamping diode will affect the voltage at the Analogue input when it is close to the maximum.
Using differential operation amplifiers to measure the difference between adjacent cells require a special sort of operation amplifier that can handle the absolute voltage that the differential amplifiers have to cope with. So pay careful attention to the data sheet when choosing one.
Come on that tells us absoloutly nothing. It is a badly written piece of marketing junk.
The battery s
Look mom no apostrophe.
And
effectively reduces the unknown risks caused by battery voltages differences.
It just converts the unknown risks into the known risks, it doesn't do anything to prevent damage. When you battery is shot, it is still shot.
We have been asking you for details of YOUR SYSTEM not some mythical marketing junk. You seem to not understand this. This leads, me at least, to the conclusion that you are attempting a project way above your current knowledge capability.
I suggest you get more experience with electronics before coming back to this project. Then at least you will be able to answer Tom's question
The XY problem is asking about your attempted solution rather than your actual problem. This leads to enormous amounts of wasted time and energy, both on the part of people asking for help, and on the part of those providing help.
User wants to do X.
User doesn't know how to do X, but thinks they can fumble their way to a solution if they can just manage to do Y.
User doesn't know how to do Y either.
User asks for help with Y.
Others try to help user with Y, but are confused because Y seems like a strange problem to want to solve.
After much interaction and wasted time, it finally becomes clear that the user really wants help with X, and that Y wasn't even a suitable solution for X.
That circuit is similar to the other circuit; it is used to monitor a ON/OFF situation.
Example, if current flows through the LED in U1, the voltage at the collector of the U1 transistor is 0 volts.
With respect, we know you want a solution, however, you just don’t have enough basic electronics knowledge to communicate your needs or to understand what responders are offering you.
You claim to want to monitor voltage. An opto coupler will not allow the transfer of voltage to be measured. It is just an ON or OFF measurement.
You can get special opto couplers with one LED in them shining into two transistors. Then you use a feedback circuit on the input to make the response liner. But what an opto coupler anyway?.
I think English is not your first language. Try writing a lot more words in your own language and then using a translator. This gives a chance of a much more accurate translation by including more context.
But this also looks like an XY problem. My post #9 is the answer to your problem. It can't be done, simple as that.
