Lithium battery protection device schema in Figure 1 is mainly controlled by the battery protection IC, and external, M1 and M2 discharge switch load switch to achieve. When the P + / P-side connection charger, charging the battery normally, M1, M2 are in a state of conduction when the charge control IC detects abnormalities, it will terminate the charge off M2. When the P + / P-side connection load, the normal battery discharge, M1, M2 are conduction; When the control IC to detect abnormal discharge, it will terminate the M1 output levels off.

Several existing lithium-protection program

2 is based on the above battery lithium to protect the principle of a common council of the lithium battery protection. Included in the SOT23-6L package, the control IC, SOP8 package is a two switch M1, M2. While control of the manufacturing process of ICs and switching manufacturing processes differ, Figure 2, two chips are manufactured in a different process, usually the two chips are chips from different vendors. Inspiron 1520 battery Inspiron 1521 battery

In recent years, the industry, there will be a set of little chips together to improve integration, reduce the size of the trend in the final program. Market lithium protection is no exception. Figure 3 The two types of lithium battery protection scheme A & B appears in Figure 2 in the two chips in one chip, but in fact its packaging in the controller and the chip switch IC is still separated from different suppliers, the program is simply combined the two letters together, commonly called “core-2-one.”

Due to internal two chips from different vendors is still very real, the form is not enough, leading to the final packaging, various forms and in many cases can not adopt a common set. The relatively large size of the package, but we can not save external components, thus “two cores in a single program, in fact, not much room for the provinces. In terms of cost, although the cost of two packets in a series of measures to reduce costs, but because of this package is usually relatively large, and some is not a common package, and some in order to reduce the size of the package should form stacking boxes and therefore the traditional two programs smart relative to its cost advantage is not obvious. Vostro 1500 battery Vostro 1700 battery

4 is a real bullet and switch the controller chip on the same wafer of single-chip solution. Diagram of a traditional program in the switch is an N-type tube, then in Figure 1, B and P in-between, commonly called “negative protection. Figure 4 in the program because of technical reasons, the switch can be replaced by P-type tube connected between B + and P +, commonly called cathodic protection. Use this chip after the completion of this program to protect the tips in the detection of the user must be replaced when the shield of the test material and ideas. This program, while a certain amount of packaging to reduce costs, but the cost of chips has been reduced, with the vast amount of competition both in the traditional program has no real cost advantage. Unlike traditional programs have become incompatible with the concept of positive protection enormous obstacles in their commercialization process. TD347 C1295

The “more than two nuclei in a” program, one program of the anode chip protection while in the program area and the cost to the user brings some advantages, but the benefit is not yet clear . These programs have also made a number of drawbacks, and the program’s traditional customers competitive and mature in the process ultimately can only reduce the space margin to price competition. Because the cost true origin of these programs, and there is no obvious advantage, therefore, with the traditional program, and passing control IC chip price cuts, these “core-2-one” option or the protection program positively and had not been able to shake the traditional program of market dominance status. hp Pavilion DV1000 battery  hp Pavilion dv4000 battery

Here we cite two examples to the detailed analysis to explain the “operational details” of importance.

Example 1: When the laptop on ac power to the state, stop it, when to unplug the AC plug? Work completed after a short period of the screen, this time, it is easy to think that success has been closed and unplug the mains plug immediately easily, they do not know the screen while closed, but the power indicator light on mother (circle with a Z-shaped like light) is always light, laptop computer, in fact, still working at that time, which means that the computer time needed to supply electricity If when you unplug the AC plug, AC power from the laptop will be immediately converted into piles Status status, the unjustified use of a second bit, the battery, so even if the number seems not to take power but accelerate the battery more quickly fell to all initial charge capacity, which reduces the battery charge with the cycle, affecting the battery life. No exchange of pulling the plug early, pull night will do? When the motherboard power on the LED turns off (the power light is lit), if not unplug the AC plug, procedures for system power management and battery inside the battery microcomputer interface management composed of approximately 5 seconds, will be automatically transferred to the “off-load condition, so the delay after the cessation does not disconnect the power plug will be no reason for” 96% of cells a short time, load, while the damage your battery. [The battery is not fully discharged before (eg electricity at 5 ~ 100%), to recharge the battery, otherwise it will shorten the lifespan of the battery. Vostro 1500 battery Vostro 1700 battery

Global above, the best methods of operation are: In addition to light the power light off the bottom of the screen all the indicator light turns off, unplug the AC plug that, with (at later 5 seconds), socket pulled out about 5 seconds after the power light turns off automatically.

According to the above analysis we can see, the original AC power, the intention is to minimize the use of the battery, thereby extending the battery with the cycle, while in the operation due to deficiencies in the details’, Ai Qing Qing anti unfinished “harm;” operational details “The importance is obvious.

Example 2: When using the AC power supply, AC adapter AC input and DC output plug plug device (unload) the operational details of the sequence is a connoisseur. Good operating practices are as follows: First the power adapter DC output plug the power jack on the laptop, then plug it into 220V AC input AC outlet and must be removed when you First disconnect the AC input jack, and remove the DC output plug. If the record (no load), the reversed sequence AC adapter is provided at no charge, power adapter is not permitted in any load condition, and because of their work on the state of the pulse, no switch load in the transformer windings will produce very high peak pressure ventilation, such as anti-IC, capacitors, voltage sensitive components. Although the AC adapter has been created in which no-circuit load protection, but because of the design must take into account other issues, the protective effect of this protection circuit is very limited, therefore, when the AC adapter at no charge state from time to time may be damaged. KD476 TD347

From the above analysis we can understand that in operation are so important in retail, and does not vague and impersonal, “said the great thing is that we generally speak of the conservative nature of science and technology. To this end, I feel the need to write some of my old rules for the operation on the battery to make the appropriate changes to the text, sorting, for reference, to draw attention to the details of operation, but also please the teacher criticized corrections and additions. Part of the increase due to the limitation, the following is impossible, as another example, in the example above, a detailed analysis, this item please forgive me too.

Active Treatment:

The following conditions are necessary to enable the treatment of piles:

1. Just open a new battery.

2. For a long time, do not use the battery, the battery away from your computer to the inventory situation is now reactivate the battery.

3. A long time do not use the battery from the notebook or laptop stand out of storage (more than two or three months) and are now reactivate the battery.

To enable methods of treatment of battery:

Activate the battery chemicals, to maximize PA3399U-2BRS PA3465U-1BRS battery performance through repeated charge and discharge the battery (fully charged and then fully discharge) three times. The so-called fully responsible and defense case: the normal startup so that the battery consumption to 3% of battery power (preferably once exhausted, can be divided into several times in power, but not interval too long), then must immediately close the battery noon.

Here, stressed the need for an immediate battery because the battery will be achieved without the use of self-discharge when the battery to 3% of electricity at that time if the charging time of battery, phenomenon of self-discharge the battery can easily result in an excessive discharge the battery on the lithium battery discharge is a big taboo.

Activation by the battery, the machine must be disabled. If the machine this time of waiting, waiting for these states, when the load to 3 ~ 4 hours after the Green Power status LED indicator has stopped beating, the machine automatically stops charging the battery for the battery can not be fully charged. When discharge to 3% of electricity, the device will automatically switch into sleep mode right now, this period should be restarted the machine, the machine starts the process, click Stop button in the lower left of the screen so that the machine stopped. ThinkPad T41 battery ThinkPad T42 battery

If this operation had a good understanding of each and every detail, and quality of your battery has no problem, we may very well turn the battery chemicals, to optimize the performance of the battery is basically a normal battery after each use to be able to reach 100%.