Tag Archives: lipo battery lifespan

The difference between li-ion and li-polymer battery

Lipo batteries often refer to the polymer lithium batteries. According to the electrolyte materials, Li-ion battery is divided into liquid lithium ion battery and polymer lithium battery or plastic lithium battery. Do you know what are the difference between li-ion and li-polymer battery? Let us review these common senses with Gens Ace.

The difference between li-ion and li-polymer battery

Compare with li-ion battery,lipolymer battery has the following characterizations:
1. It would not leak the electrolyte, since it uses the colloidal solid rather than the liquid electrolyte.

2. It can be made into thin battery. For example, a 3.6V 400mAh 15C battery can have the thickness of 0.5mm.

3. It can be designed into multiple shapes.

4. The battery can distort and be flexible. The macromolecule battery can distort up to 900 around.

5. It can be made into single high voltage: the battery with liquid electrolyte can only acquire the high voltage and macromolecule battery by putting several batteries in series.

6. Because the battery itself does not have liquid, it is possible to obtain high voltage by making multi-layer combination inside the single battery.

7. The capacity is twice as that of the Li-ion battery.

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The lifespan of lipo battery

The factor influenced the lifespan is the charging cycle, and the times of charging will not directly influence the lifespan.
For example, the first day, we charge the battery after consumed half of the power, and the second day, we repeat that process. This is just one charging cycle rather than two. Therefore, a cycle may be finished by several times of charging. Every single charging cycle will reduce the power slightly. However, a superior battery can maintain 80% power after many charging cycles. That is why some lipo battery can use normally after two or three years. Certainly, it is also needed that we replace the lipo battery if the lifespan has ended.
The lifespan of lipo battery is commonly 300-500 charging cycle. We set the Q as the power provided by one-time fully discharging. Ignoring the reduction of every charging cycle, the lipo battery can power 300Q-500Q through its lifespan. Accordingly, if we charge the battery after consuming power, the battery could be charged for 600-1000 times. (if we charge the battery after consuming 1/3 power, the battery could be charged for 900-1500 times.) we cannot tell the exact number of charging times if we charge randomly. In a word, the total power 300Q-500Q is constant. Therefore, the lifespan is related to the total charging power rather than the charging times. Besides, the difference between the influence of deep charging and discharging and the influence of light charging and discharging to lipo’s lifespan is similar.
In fact, light charging and light discharging benefit more to the lipo battery. Only when the lipo battery is calibrated by the product has the need to charge and discharge battery deeply. Therefore, we can use the lipo battery for convenience and do not have to concern about the lifespan.
If the 11.1v lipo battery is used above the regulated temperature (over 35 degree centigrade), the power will continuously decrease, which means the flight time would not be so long. If charged under the high temperature, the battery would be further damaged. It is unavoidable that storing under the high temperature will hurt the battery’s quality.
If using below the 4 degree centigrade, you would also find the flight time of the battery has been reduced, and even some original lipo batteries of mobile phones cannot be charged. But, this situation is just temporary. Differ from using in the high temperature, once the temperature gets higher and the molecules inside the battery are heated, the battery would recover to the normal energy.
To maximize the performance of lipo battery, we should use it more often and make the electron flow. If we cannot use the lipo battery frequently, please remember to make a charging cycle and calibrate it (charge and discharge deeply) every month.

Source: http://www.genstattu.com/blog/the-difference-between-li-ion-and-li-polymer-battery/

A few factors that influence the lipo battery lifespan

Is it necessary to activate the new Lipo battery?

For sure. Actually, the activation is processed by the factory, and the users are not capable of activating it. The real process for activating is as follows: filling the electrolyte, seal, formation, charging at constant voltage, discharging (for several cycles). Then, the electrode is fully immersed with the electrolyte until the capacity has reached the standard. That is the process for activating batteries-capacity grading. That is to say, when the lipo battery is sent to the consumers, it has been activated. Besides, some of the activations should be processed in an open status, and the RC car batteries lipo are sealed after activation. How to activate the car batteries on your own unless you have the equipment for producing cells.

Why are the fully charging and discharging recommended for the first three times?

In fact, there should be a few days or months to deliver the battery from factory to the users, so the cell material would be blunt. At this time, the capacity is below the normal value, and service time will be shortened. However, the lipo-battery is easy to activate. Only by cycling the power for three to five times could the capacity be restored to normal value. According to its characteristic, the lipo-battery does not have the memory, so no special measures or devices should be used to activation.

Charging for long time is dangerous

Charging for long time could result in overcharging. After fully-charged, the battery will stop charging. And, the charger for nickel battery would not charge for 10 or more hours like the “stream”. In other words, there is no use to connect the fully-charged battery with the charger.

Lifespan and factors

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lipo battery could be charged and discharged for 300-500 times,such as Gens ace 5000mah lipo battery. It is better to partially discharge the lipo battery rather than fully discharge. Once the battery is off the production line, the lifespan for battery begins to count down, no matter whether you use it or not. The increase of internal resistance, caused by the oxidation, gives rise to the decline of the capacity. Finally, the electrolyzer will reach a point that though the batteries are fully charged, it cannot release the power.

Factor #1# the depth of discharging and the times of charging

The available times of charging* the depth of discharging=times of total charging period. The more available times of total charging period, the more lifespan the battery has. That is, the available times of charging *depth of discharging=actual battery lifespan (ignore other factors) The more deeply the battery discharges, the less available times of charging.

Factor #2# over-charging, over-discharging and the large current

It should be prohibited to over charge the gens ace 2s lipo battery, any forms of over charging will result in the damage even explosion.

Factor #3# extreme hot or cold condition

The temperature exerts great influence on the lifespan of lipo-battery. The condition under freezing point could burn up the electronic devices immediately. And, the high temperature will reduce the batteries’ capacity.

Factor #4#being fully-charged or no power for long time

Both low and high battery would negatively influence the lipo battery. The times of charging symbolized on the signal of electrical devices or battery are tested under the 80% power. Low battery or no energy will increase the resistance of the internal battery, so reduce the capacity of battery. The best condition of lipo-battery is the middle capacity, and it will reach the longest lifespan.

Source:http://www.genstattu.com/blog/a-few-factors-that-influence-the-lipo-battery-lifespan/