Misunderstanding the use of lithium-ion batteries

Misunderstanding the use of lithium-ion batteries

With the cell phone, PDA, DC, DV, as well as MP3, MP4 and other new Laptop Battery digital products, rapid spread, people from accessing opportunities for lithium-ion batteries sharp increase. As usual the energy to power the battery, naturally important, because its performance will directly affect the pros and cons of the normal functioning of the device. I believe anyone who do not want to face a critical moment of awkward half-way without electricity, care and maintenance make good use of lithium-ion batteries have become a necessary part of digital products. However, since most people do not quite understand the characteristics of lithium-ion batteries, in the course of daily use easily into a number of errors, not only seriously affect the battery life, but also resulted in a waste of social energy. Here we will talk about the five common errors.

Misunderstanding 1: the larger-capacity battery the better

In a sense, this view is indeed correct. Set aside the price and weight, the same model with the volume capacity of the battery of course, the bigger the better, the capacity to provide higher the longer the time to work. However, there is some manufacturers to produce large lithium-ion battery nominal easy more often than not in improving the effectiveness of the efforts to improve Toshiba PA3591U-1BRS Battery cell materials, but uncontrolled electrode stabilizer added to the relative decline, and that the battery while measuring up the first volume is indeed very Great, but after dozens of recycling capacity will be quickly depleted, leading to rapid obsolescence, and those electrode stabilizer sufficient, low-capacity battery, even if the work in 2023, remain young forever. At the expense of life cycle costs in exchange for the big easy, not something that we pay for it, when you do not want to buy the battery capacity, seek big blind comparisons.

Misunderstanding 2: The battery recharge used in automatic shutdown, can extend the use of time

Re-charge the battery is designed to use, usually we are most concerned about is a total piece of the battery Toshiba PA3506U-1BRS Battery can use for how long. In order to measure to compare different brands of rechargeable batteries for this feature, we introduced the concept of cycles. International regulations in the 25 º C room temperature conditions, with constant current constant voltage mode 1C (Note: "1C" - charge and discharge current unit. Intended for the use of 1000mA current on the 1000mAh capacity battery charge, discharge, or 500m

A current on the 500mAh capacity battery charging and discharging ... ... and so on. ) Charge 150 minutes, is now in order to discharge constant current 1C to 2.75V set only for a loop. When a first discharge time of less than 36 minutes when the counting ended, cycles must be greater than 300 times. And it was felt would reduce the charge and discharge the battery once a life time, so desperate as much as possible the delay time of each use, the battery consumption of the device does not automatically shut down without charge. In fact, need not necessarily be the case, because characterization of lithium-ion battery life cycles of deep charge deep-discharge method is based on the measured, while the actual use of the ever-changing individual user can not be in accordance with international test mode to use the battery discharge is absolutely not a big current discharging constant Toshiba PA3291U-1BRS Battery current discharge. Is usually small current discharge pulse discharge and a hybrid method under conditions of use completely different number of cycles will naturally be different, if the cut-off voltage was increased a few volts to test zero, then the cycles will be greatly increased. In the absence of memory effect nickel-cadmium batteries, lithium-ion battery is very suitable for use with the charge as there is no need to use rechargeable shutdown device, which is precisely the advantages of lithium-ion battery.

Misunderstanding 3: multi-chargers green light after charging for a while, the battery can charge more saturated

In fact, the public is a green light charger instructions, the charge may not eat the whole bread depends entirely on the charger for charging the internal circuit control mode. Charger output is usually after the first constant current constant voltage, that is, the first constant current charging. Current will, the battery voltage is gradually increased as the charging process; when the battery terminal voltage reaches 4.2V (or 4.1V), then changed to constant voltage charging, the voltage must, the current will gradually decrease as the charging process. When the current is less than a certain value (usually set to 50mA), the green light. But the green light after the charging of different chips then respond differently, if it continues to carry out constant voltage charging, and strictly control voltage Toshiba PA3356U-1BRS Battery does not exceed 4.2V, no doubt charge more for an hour can really increase the battery capacity. He fears that face those cheap chargers, while continuing to charge, but its control precision is poor, if not careful the battery beyond 4.2V, and causing overcharge will result in overcharge will seriously shorten the cycle of life. Some charge devices such as T1 (Texas Instruments) and BQ2057 series and linear (Linear Technology) and LT1800 series is completely off at this time charging circuit, not continue to charge, then recharge for 10 hours no avail. There charge pulse mode, such as maxim (Maxim) and 1679 chips, display a green light, the lithium-ion battery has been 100% full charge, and there is no need to re-charge. Moreover, even if the rechargeable lithium-ion battery not too full it will not affect the cycle of life, only single-use significantly less time. In order to avoid irreparable damage, we have general non-technical users to completely remove immediately after the green light to use.

Mistakes 4: Chargers marked the greater Toshiba PA3250U-1BRS Battery the output current, the faster the battery charging

Charger output current size of the subject only to demonstrate its ability to provide current, is not exactly the same as the actual charge current lithium-ion battery, the charge current size also depends on the charge management. Charging management is switching mode, namely the high-frequency pulse-width adjustment (PWM) mode, the charging current is generally much lower than the charger output current. Of course, the above is that lithium-ion batteries in terms of constant current charging. As the lithium-ion batteries are used after the first constant voltage constant current charging mode, in a certain range of current (0.5C-1.5C) in a separate increase in the constant current charging current value and does not accelerate the rate of battery charging and eat.

Misunderstanding 5: The battery is full after the store, can reduce the capacity loss

This idea can be described as wrong, lithium-ion battery is different from the nickel-chromium, nickel-metal hydride batteries, because it has a very bad "aging" of nature, it is in storage for some time, even without the use of recycled some of its capacity will be a permanent loss of reason or the battery positive and negative material from the factory after it has already Toshiba PA3395U-1BRS Battery begun the process of failure. At different temperatures and different charge states of "aging" the pace is different, as shown in the table:

Storage temperature power status

40% of the saturated store 100% saturated storage

0 º C left 98% (one year later) left 94% (one year later)

25 º C left 96% (one year later) left 80% (one year later)

40 º C left 85% (one year later) left 65% (one year later)

60 º C left 75% (one year later) left 60% (3 months later)

As can be seen from the above data, storage, and charge the higher the temperature the more saturated, the battery capacity loss will be more rapid. It is not recommended you to save a long time in the saturation lithium-ion batteries. For the idle hands of the battery Toshiba PA3399U-1BRS Battery, storage, charging only 40% when you try to, and stored in the refrigerator room.