Notebook battery exploded in the face of serious facts, ask the reporter of Xinhua professionals as well as a well-known manufacturers of design engineers. According to the analysis of lithium battery from Wu Waihu explosion or short circuit had caused sufficient, the biggest is the possibility of a lithium battery at the time of manufacture, because the manufacturing process itself flawed, because the product can occur at any time there is a potential safety problems, such as should be the insulation between the metal poles of dust or copper foil and aluminum foil pierced the glitch is a lack of short circuits caused by micro. The former is the most serious, as a direct result of a large number of short-circuit and heat production, resulting in vaporization of some of the electrolyte, the battery case Stretch.
In addition, there is a rather exceptional power charger or laptop computers due to special reasons, lithium battery to provide instant high-voltage / current strong lead over the serious charge, such as the charging voltage 12.6V by the sudden rise to 12.9V Or more, this time there will be a charge of high-flow generation, in-house circuit the battery charge current should be cut off action, but some of the lithium battery over-voltage, over-current protection design is very weak, which may result in damage to the battery protection IC, so that the notebook battery to make the protection and the damage after a charge-off around the needle-chip lithium metal crystallization of the piercing point resulted in a number of micro-short-circuit, causing the battery temperature gradually increased until the final battery explosion, the fire occurred, This is a lot of notebook battery ”hot” the main reason.
Add a layer of protective cover At present, the mechanisms for the protection of the battery from the point of view, rechargeable battery pack in front of some of the traditional chip makers are mostly provided by the program play a precise control of charge voltage and charge current role in the over-voltage and over-current control does not provide corresponding Solutions. In this way, for the protection of the battery pack is entirely dependent on the battery itself, such as the charge-off protection, over-discharge protection, charge-off protection, have put current protection, over-temperature protection and so on. Protection in place as a result of the need to prevent first-class IC protection MOSFET failure or short-circuit caused by over-voltage fault, so the second-level protection IC will generally be considered is the protection of the battery pack in the last line of defense. In this connection, e-convex (O2 Micro) Hong Shi Zhen product manager, said the different views, in his view, for the protection of the battery pack can be moved forward through additional controls on the charger to realize the detection and control of battery charging action, which will no doubt further enhance the level of protection.
portege 4000, satellite a10 series, satellite a100, satellite a70, toshiba laptop battery, satellite a75, satellite 1900, satellite a60-662, satellite a65 series,
