The requirements for these batteries comprise high release rates, low insertion loss from components in series by means of the cells, high-precision measurements, superfluous security protection, and no upset by means of incredibly high ESD transients.
Plus key issues exacting to a low-side Li-ion protector circuit are converse. The transients shaped when the Li-ion protector opens throughout a brief short or when the battery is unplugged even as beneath load may exceed the voltage rating of semiconductors in the battery set. This theme describes a number of plan issues and suggests solutions to make your mind up or get better them. Resolution of these subjects requires attention to together the circuit design and the printed circuit board (PCB) explain.
If we analyzed the Fig. 1 then we come to know that it is a block drawing of circuitry in a typical Li-ion battery set. It demonstrates an instance of a security protection circuit for the Li-ion cells and a gas gauge (capacity measuring device). The security circuitry includes a Li-ion protector that controls back-to-back FET switches. No doubt, these switches can be opened to defend the pack next to fault conditions such as in excess of voltage, beneath voltage, and over current.
If we analyzed then we come to know that the figure also comprise a temperature responsive three-terminal fuse that will open due to long-drawn-out over present or over temperature, or it can be forced to open by superfluous protection circuitry in case there is a responsibility where the main protection circuitry fails to respond. ...