subject: According to analysis, nothing less than the lithium battery explosion caused by a short circuit or overcharge [print this page] According to analysis, nothing less than the lithium battery explosion caused by a short circuit or overcharge
It not only from the series / parallel composition of multiple batteries, the circuit substrate itself also contains two modules: the protection circuit board (Protection PCB) module and Smart Battery Gauge Board module, its design includes a set of batteries to protect the first-class protection IC (to prevent battery over charge, over discharge, short circuit), the second-level protection IC (to prevent the second over-voltage), fuses, LED direction, temperature control and other components.
In the multi-level protection mechanism, even in the power charger, laptop computers in an anomalous situation, the laptop battery can only be converted to automatic protection status, if the situation is not serious, often re-plug in after the work can not will explode. the face of the serious laptop battery to explode the fact that journalists ask the power of professionals and a well-known manufacturers of design engineers Laptopbattery ACER Laptop Battery.
According to analysis, nothing less than the lithium battery explosion caused by a short circuit or overcharge, the biggest one is the possibility of lithium in the manufacture, because the manufacturing process itself flawed, these products may occur at any time there are security risks, such as should be insulation between the two poles of the metal powder or copper foil and aluminum foil membrane perforation burr, resulting in micro short circuit. The former situation is most serious, it will directly cause a short circuit, and a lot of heat, resulting in vaporization of some of electrolyte will stay large battery case .
In addition, there is a rather special situation, the power charger or computer due to special reasons, the instant to the lithium battery with high voltage / high current leading to severe overcharge like charging voltage by a sudden rise to 12.9V or 12.6V higher, then there will be a high charging current generated within the circuit should move to cut off the battery charge current, but because of some lithium battery charging voltage, over current protection design is weak, this may result in damage to the battery protection IC,
