What is memory effect

If you have a nickel-based batteries, when their use is necessary to make sure that the battery is fully discharged and then recharged it. If you do not follow this rule and put on the charge has not been fully discharged battery, then he may develop a memory effect (decrease capacity). What is the effect of memory I'll discuss in this article.

Note. I hasten to say that lithium-ion batteries of this effect is not observed. And these batteries contrary better charge, without waiting for a full charge. Since the power of technology lithium-ion battery "love" to be fully charged.

What is memory effect

Let's talk about batteries based on nickel. So if you are constantly put on the charge not yet fully discharged battery, for example, 1/3 of the charge will be even in it, a couple of tens of cycles the battery will "remember" this state and begin giving energy only to this level.

That is, the indicator will show that there is still a charge in the battery, but the device will be switched off.

And the thing is this: the problem is formed because within the battery begin to increase crystal formation, which leads to a decrease in the total area of ​​battery fluid.

It turns out the following is true: the image of a large size crystals in the battery, the lower their total area, that is a reduction in total capacity.

Rather large crystals may even damage the separator, which irreversibly damage the battery and lead to the fact that the product will be very quickly lose its capacity.

What batteries prone to the memory effect

Not all products have this feature. So the memory effect is shown in the following products:

1. NiCd - Nickel-Cadmium batteries.

2. Ni-MH - NiMH, batteries are somewhat less susceptible to memory effect.

3. Li-Ion - lithium-ion batteries. Do not be surprised that this type of battery as there is on this list. By itself, the effect is present, but its impact on the overall capacity is so low that they simply neglect.

How to protect the battery from the memory effect

Prevent the development of memory in the battery effect can be only one way: the strict observance of the operating mode.

That is, during the operation to discharge the battery completely (up to a safe value) and after discharge put on charging.

Also leave before the end of a charged battery into the charger, especially if it does not turn off charge current when a charged battery.

In principle, you can not worry about the battery is completely discharged or not, if you use the charging function "dorazryada". For example, I is such a charge.

What should I do if the memory effect is already there

In principle, up to a certain limit the memory effect is reversible. In order to neutralize it, you need to periodically conduct so-called "training" the battery. It is necessary to make a few cycles of the charge-full discharge.

Just excellent results in capacity restoration show the batteries after discharge alternating asymmetric shock.

But if the internal crystals grown so that the damaged separator, that is, the battery discharges very quickly after a full charge, the better the product is replaced by a new one.

In producing a complete cycle of charging and discharging as preventative measures NiCd battery at least, and once a month Ni-MH twice a month.

conclusion

That's all I wanted to tell you about the phenomenon as memory effect. If the article was useful to you, then vote her huskies and thank you for attention!