The difference is:
The 8254 is a protection IC specially designed for 3 and 4 string batteries, while the 8261 only supports protection for 1 string batteries. chain. If it is used for multiple strings, you need to build your own circuit. During the construction process, it requires strict modeling and electrical skills.
8254 has a very mature protection circuit for string and 4-string batteries. As long as you build the circuit according to specifications there will be no problems. Battery chatter is not necessarily due to over-discharging.
"Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses non-aqueous electrolyte solution. Lithium metal batteries were first proposed and studied by Gilbert N. Lewis in 1912. In the 1970s, M. S. Whittingham proposed and began studying lithium-ion batteries. Since the chemical properties of lithium metal are very active, the processing, storage and use of lithium metal are subject to very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have now become mainstream.
Does anyone know the lithium battery protection circuit chip?
To ensure that the reference voltage of the AD has a dedicated reference voltage source (built-in IC).
But the single function chip you mentioned for monitoring lithium battery power is hard to find. Most of them are lithium battery charging management chips. I've also been working on this recently.At present, when I read about power detection on the Internet, there are ready-made modules with LED displays for sale, which you can buy and use directly.
You can also use an op amp circuit (LM324) to do this, but I haven't figured out how to do it.
Your battery is normally damaged. This is because the battery life has expired and it is not a problem with the protection circuit, so it cannot be repaired. It is normal that you cannot find the chip because of the chip. the model was changed and the circuit should be like this. You should be able to find it by looking for the model number in the image below, not to mention the spec sheet.
http://www.elecfans.com/article/UploadPic/2008-6/200861313211513248.jpg