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Thin, large-capacity, long service life, these are the outstanding characteristics of lithium batteries. For this reason, lithium-ion laptop battery was quickly replaced by nickel-metal hydride and nickel cadmium batteries role as notebook computers, portable products, the preferred range of equipment. Near Period, discovered in a row of notebook battery explosion, the notebook battery time and again to the air waves, lingering fear that end users, lithium batteries in the end is the source of power or time bomb?

The study found the battery on fire mystery

In general, the current notebook lithium battery pack itself with better protection.

It not only by the series / parallel multiple batteries, also contains its own circuit substrates two modules: the protection of Circuit substrate (Protection PCB) module and the Smart Battery Gauge Board module, a set of batteries to protect its design, including the first-class Protection of the IC (to prevent the battery charge-off, let-off, short-circuit), the second-level protection IC (for the second time to prevent over-voltage), fuses, LED direction, temperature regulation, and other components.

In the multi-level protection, even in the power charger, notebook unusual, notebook battery can only be changed automatically to protect the state if the situation is not serious, often re-plug in after normal work can not Will be an explosion. 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 batteries from Wu Waihu explosion or short circuit had caused sufficient, the biggest is the possibility of a lithium powerbook 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 burr diaphragm, causing a short circuit, such as 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 batteries 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, the internal battery circuit moves to cut off the charge current, but some of the lithium battery over-voltage and over-current protection design is very weak, which may result in damage to the IC to protect the battery, 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 A1078  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 forth.

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 generally is considered to be the protection of the battery pack is the last line of defense. In this connection, e-convex (O2 Micro) Hong Shi Zhen-product manager expressed different views, he believes that the protection of the battery can be moved forward, through the charger attached to the control functions to achieve the detection and control of battery charging action, which will no doubt further enhance the level of protection, The use of lithium batteries on the protection of security.

To this end, O2 Micro in power management for portable devices developed by Cool Charge solutions, the integration of a project called Cool Battery Technology A1148  protection technology, which is the main feature of a traditional charger generally do not have the OVP (over Voltage Protection) and OCP (Over Current Protection) function to protect the two batteries, the technology has been Cool Charge IC chip embedded in them.

Cool Charge IC chip used, the power charger to a large extent will assume the responsibility to protect the battery. Cool Charge IC subject to the control of the charger in comparison with the traditional design (see Figure 1), needed to significantly reduce the external device And eliminate the need for Q3 and Q4 part of the design, reducing the failure rate. Retained in the Q1 and Q2 (to improve the original design of components) between, Cool Charge IC set up a detection point, the factory settings, the Detection of point voltage and current settings are slightly smaller than the battery manufacturers to set safety requirements. In this way, in charge voltage or current Cool Charge IC beyond the security settings of voltage or current value, IC control Q2 off, the first battery Protective effect before the cut off charge; from the frequency of detection, protection, detection of battery time for the millisecond level, and through the chip to detect, you can easily achieve the level of seconds per million, can be very high The frequency of detection in a row, thus realizing the first step in the protection of the PowerBook G3 battery  pack.

Now appearing on the market penetration is highest in the lithium-ion battery (Li-ion) As a result, this article will focus on lithium-ion battery. Know your notebook battery you need to clarify the following parameters: laptop battery capacity, rated voltage, the normal temperature and so on.

From the size of the capacity of the main battery to determine mAh marked by its Chinese name is milliamperes. Milliamperes have a direct bearing on the size of notebook batteries by the use of the time, but it can not be generalized. Is not to say that the notebook battery supply capacity of the greater use of more durable in actual use in the process of life were closely related to the ability of the notebook power consumption. We can imagine a notebook configuration, the higher the greater energy consumption, the greater the amount of running the operation of the passage of electricity will be the faster speed.

Is the normal operating temperature of the battery can work in normal temperature range, in the use of non-normal temperatures likely to be dangerous (explosive), as well as unnecessary trouble (leakage, all of a sudden power).

Date of production, which in some older models of notebook batteries will be in it directly in your piece of the battery can use the length of time, this is a decision of the normal use of battery time for the important parameters. That is why we buy a notebook’s battery when it is necessary to pay attention to the production date, even if the new batteries placed on the longer time of his life will be reduced accordingly. Expect to buy second-hand books for the users should pay attention to the aspects of the parameters.

How to tell what the parameters of this battery? From the picture we can see the type of battery used for Li-ion, lithium-ion battery that is. Rated output voltage 10.8V, for electricity 4800mAh. Of course, there are manufacturers, production, the normal operating temperature (0 degrees -60 degrees Celsius), and so on, the asus battery is currently used such a logo, you can enlarge the picture to the top of their notebook batteries some basic information.

The books of the external battery structure, we can only look at some of the above parameters, the internal structure of many people believe that “dare” to understand. After all, the price of notebook batteries, or be called expensive.

In fact, the essence of notebook batteries and rechargeable batteries common no-like, but the major vendors have models for their appearance for the battery case processing, so that if ripping out shell of the notebook battery, its internal structure and Ordinary batteries do not have the distinction of any kind, that is the major mutual constraint brand notebook batteries commonly used is the biggest obstacle to major notebook PC brand among independent design.

A closer look at the internal battery, which is a few cells of the group series and parallel circuits, in general, by a single battery capacity and voltage requirements of notebook batteries bound notebook batteries generally used after the first series of parallel approach to ensure its Voltage and battery capacity, an analogy, if a nominal 12.5V, 4000MAh battery of the notebook, is the general comprised of this: first 3 single voltage 4.2V, 2000MAh series of batteries to its The nominal voltage 12.5V, and then through a group of the same cell re-composition of the parallel circuit, the overall battery capacity to 4000MAh, this battery is generally said to 6CELL the battery pack.

For notebook computer batteries, as well as internal and external power supply are some of the principles of understanding, we will be able to work better in the day-to-day life M8511 battery  used in notebook. Then I talk about in their own laptop batteries for use in some of the experiences and suggestions.

First of all, get a piece of new batteries, a lot of users is in accordance with the practice of business tips in the lithium batteries used in the previous three charging even more than 12 hours. In this debate there are many on-line, but I found that in actual use, in fact, the majority of the notebook battery is not necessary. Why? Merchant said that in order to fully activate the cell’s activity is entirely new wake-up battery. For this reason it sounds very full and credible, but we have not thought about this issue. If, notebook battery manufacturers has not been fully activated on the play, so the product can be said that only a semi-finished products. Can not require each user to master the skills to activate the battery, it is impossible in reality. As a result, the battery factory has been a manufacturer of a fully activated. How are users to charge the battery for 12 hours in favor of the use of it? Here the author gives a negative answer, the current notebook batteries have improved power management circuits and charging management system, when the battery reached saturation, the control circuit automatically switch to short-circuit, it is only after time in a waste of time Only. How can activate the battery of this activity? In fact, the manufacturer of the battery is activated in the absence of overload protection of the battery will discharge and recharge for a long time. Therefore, charging three times before the 12 hours is not necessary.

At times, a lot of users in the use of batteries in the very confused as to whether or not to wait until the battery run out completely before charging. In fact, this question should be answered like this, if you can do is certainly a good thing, but the premise is your problem too. Of course, I am talking about here is not referring to the excessive discharge, excessive discharge Practice has proved that the M6091  is absolutely harmful, it will shorten the battery life. Therefore, when the notebook prompted a time of low power consumption will be able to charge the appropriate time. Some business has repeatedly stated that its lithium battery memory effect did not, this is very irresponsible. So when you have more battery power when it is better not to charge for the good, because the memory effect is real.

Thirdly, the need for long-term battery should be how to do, into the proposed 40-50% of the electricity, placed in the shade of the low-temperature, the following parameters will be able to note the problem.

Storage temperature of 40% of the state-of-charge 100% state of charge
0 degrees 98% (after one year) 94% (after one year)
25 degrees 96% (a year beyond) 80% (after one year)
40 degrees 85% (after one year) 65% (after one year)
60 degrees 75% (after one year) 60% (3 months)

(Percentage of saturation at the time of the initial value of the relative percentage)
Of course, the best month we should come out with a battery, the battery can ensure a good state of preservation, and not let the loss of full electricity and cell damage.

Fourth, in notebook computers for use in “a month after the charge should be full-time release” if necessary. Notebook computer lithium-ion batteries used in general management with a chip and charge control chips. One-chip management in a series of registers, there is capacity, temperature, ID, state-of-charge, discharge, such as the number of values. These values are in use will gradually change. Personally, I think, in notebook computers for use in “a month after the full charge should take a” leading role of these amendments is to be improper, the value of the register, making the battery charge control and A1012  with a nominal capacity of the line The actual situation. This is why the work could not be omitted, after all, the high-priced notebook or effemination the aristocracy.

The use of the last turn on, how to make the book more batteries for a long time. Since you bought a laptop is to use it, the battery is a consumable items, is bound to use as an extension of time to go and end-of-life. What books to allow a longer battery life? Power-saving technology? Sleep? Hard to let hang? Reduce the brightness of the screen so? All these methods seem to be able to increase the so-called extension of the time. But you have never thought that such a meaningful extension of the time it? I do not run any open book process, do not open display, not to hard, I can not reach a longer period of time. This would be absurd, is used to use the notebook, rather than high-sounding setting. I therefore propose that we make good use of the notebook, rather than about how to use the notebook. Perhaps, two years after the notebook market is another world, your books have reached the ranks of the retired. As long as we pay attention to day-to-day use of A1078  used to, the normal cells can be used, there is no need to be timid.

In the successful implementation of the road and railway line crossing activities of the plane, picking installed capacity of circuit-protection projects, such as modified, refined gold rechargeable flashlight for the use of electronic machines charge detonated solutions to the electronic machine set off the problem of short laptop battery life The annual cost savings of more than 20 million batteries.

Underground detonation of electronic machines for the battery damp after a short life, and as a result of expensive high-performance dry batteries, the mine has to take plastic (12045, -290.00, -2.35%, right) wrapped bags of moisture, heat lamp, such as dry cell battery Life and so on, have little effect. Since then, many organizations find the cause of the mine, to draw on collective wisdom, science and technology research.

In the tests, the argument on the basis of the mine by underground miners commonly used rechargeable flashlight charger next, followed by DC-DC plug. E-off machine touch-film  HSTNN-LB31 battery anode is the lead Department then DC Block, the mother and fixed in the electronic machine shell detonated. After the connection charge each other for about 10 seconds, the plane set off a rapid increase in voltage to 1,000 volts, to set off voltage. This method not only saves cost, easy to carry, and no security risks.