subject: many lithium battery failure is the failure of the core package of a power-saving result [print this page] many lithium battery failure is the failure of the core package of a power-saving result
Activate "older" laptop computer batteries
Battery in use for some time after the will "age" of the
Manifestation of resistance change is large when the voltage across the charging up too fast so easy to charge control circuit judge to have full capacity will naturally be "down". As the larger battery internal resistance, discharge voltage drop, high speed, the system can easily mistaken for a voltage not enough, power is low (in fact there is not power up). You can see from the above description of the battery's aging process is a vicious circle, the discovery of battery time out faster than what it should be tempered, otherwise, sooner or later will complete hp laptop battery ibm laptop battery
In addition, many lithium battery failure is the failure of the core package of a power-saving result, an assumed name or bad a pot of soup. This phenomenon is inevitable, because every energy-saving battery can not be completely consistent with the nature of the core, there are some quality with long aging first weakened, undermining the overall (in series) if the discharge curve. It simply means that section of bad batteries before charging full, discharge it first had finished, but this time the capacity of other batteries are not being fully utilized. Core of a saving over charge / over discharge will not cause the battery monitoring circuit that is full / End of release. For example, when charging the other began to close on batteries when full charge voltage, then the bad section on batteries may have to 4.30V or higher voltage, resulting in overcharge damage, while others are fully satisfied. Editor's Note: For internal batteries battery damage, the "China Computer Education," 2001 No. 2 has a great article - "laptop battery DIY" worth learning. Interest, courage and ability friends can try to open the battery pack, believe in the multimeter's help, you can quickly find the damaged batteries (abnormal voltage). If conditions allow, according to the corresponding parameters of batteries can replace the qualified product.
Battery charge and discharge
Lithium-ion battery charging, first by way of constant current fast charging, the voltage reaches a certain value and then to constant slow charge mode. Usually laptops are not strictly constant current charging control device. When the system load large charging current to a small, contrary to large, this current from the AC power adapter power margin decision. Clearly, the system will charge the battery and other components, such as CPU, hard drive, LCD and other competing energy sources. I tried to run side Super, while charging the way, found that the charge current between the change in the 0.70 ~ 1.70A, can not meet the requirements lithium-ion rechargeable battery, so I worry that this work would charge the battery has been damaged. IBM statement on the requirements of the notebook computer will not operate when charging is probably the reason.
