subject: the power charger will largely assume responsibility for battery protection [print this page] the power charger will largely assume responsibility for battery protection
So that loss of laptop batteries and damage protection, over charge over the needle after the pole-chip crystal of lithium metal, piercing point lead to multiple micro-short circuit, causing the battery temperature is gradually increased, until eventually the battery explosion, fire phenomenon, which is the number of laptop battery "hot" the main reason.
Covered with a layer of umbrella
Currently, from the protection point of view, battery charge in front of some of the traditional chip makers are played most of the programs provided precise control of charging voltage and charging current role in the over-voltage and over-current control does not provide the appropriate solution program. Thus, the protection of the battery is completely dependent on the battery itself, such as over charge protection, over discharge protection, over-charging current protection, over discharge current protection, over-temperature protection and so on laptop battery ACER Laptop Battery .
Protection in place need to prevent the first-level protection IC MOSFET failure or short circuit caused by over-voltage fault, so the second-level protection IC will generally be considered is the battery pack to protect the last line of defense. In this regard, Bump E (O2 Micro) Product Manager Hong Shizhen expressed different views, he believes that the protection for the battery pack can move forward, additional controls on the charger to achieve detection and control of the battery charge movements, which undoubtedly will further enhance the protection level, essential to the protection of lithium batteries safe.
To this end, the O2 Micro power management for portable devices developed by Cool Charge solution which combines the one called Cool Battery Technology battery protection technology, its greatest feature is its traditional chargers generally not available OVP (over Voltage Protection) and OCP (Over Current Protection) two battery protection, the technology has been embedded Cool Charge IC chips were.
By Cool Charge IC chip, the power charger will largely assume responsibility for battery protection. Under the control of the Cool Charge IC design compared with conventional charger, the need for external devices significantly reduced, eliminating the need for Q3 Q4 part of the design and reduce the failure rate. In Q1 preserved and Q2 (device to improve the original design) between, Cool Charge IC set up a detection point, through the factory setting, the voltage of the detection point with the current settings are slightly less than the battery manufacturers to set safety requirements. Thus, in the charging voltage or current beyond the Cool Charge IC set of security after the voltage or current value, IC disconnect on the control of Q2, first cut off before the battery protective effect charge; from detecting the frequency of view, the battery protection level detection time interval of milliseconds, and through the chip to detect, can be very easy millionth of a second level, you can use a high frequency of continuous detection, in order to achieve the first step to protect laptop battery purposes. (Source: Zhongguancun Online)
Thin, high capacity, long life, these are the outstanding characteristics of lithium. For this reason, lithium-ion battery, it has rapidly replaced the nickel metal hydride, nickel cadmium batteries role as notebook computers and other portable devices optimized for power endurance. And in the near future nor any new technology can replace the lithium battery into the mainstream. we usually use the laptop in and pay attention to safety, they can avoid accidents.
