How to activate nimh rechargeable batteries

Lithium battery overdischarge protection, with constant current constant voltage source directly charge the cell (lithium battery removed after the protection plate a lithium cell); In don't open the battery case, trying to tear the label paper, a small mouth, tore open the outer packing should be an aluminum shell, with constant current source of black pens and toward the anode input end of the protection board, red pens and to the aluminum shell charging, charging voltage to 3.0 V above can stop, lithium battery protection board at this time of protection natural cancelled; Cover the exposed aluminum shell with tape; Then you can directly charge the battery with the charger, but also pay attention to whether the battery drum, if there is, the battery still can not be used; If the above method still fails to charge the battery, then the battery must be disassembled and charged directly to the positive and negative poles of the cell. My original NOKIA3310 battery is this problem

It is good to rush continuously for 12 hours above, it is the electrolyte inside put too long solidification just, be at ease, as long as lithium electricity does not rise, do not break in principle to rush 24 hours to also be no problem. After such activation need not rush 1 so long, it is ok to press instruction to rush later.

1, to activate the lithium battery can't use high voltage, because it's protective plate protection there are upper and lower voltage, high voltage will blow out the protection board MOS tube, the activation of lithium batteries need to be across the electrodes of the charger directly across the electrodes of the battery charging, when the voltage rise to logoff voltage protection plate, plate protection will be normal work, the normal charge.

2, the lithium battery (Lithiumbattery) refers to the electrochemical system containing lithium (including metal lithium, lithium metal and lithium ion, lithium polymer) batteries. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium-ion batteries are typically non-rechargeable and contain metallic lithium. Lithium-ion batteries do not contain metallic lithium and are rechargeable.

3, lithium battery is a lithium metal or lithium alloy as the cathode material, the use of non-aqueous electrolyte solution of the primary battery, and rechargeable battery lithium ion battery and lithium ion polymer battery is not the same. The inventor of the lithium battery is Edison. Due to the very lively chemical properties of lithium metal, the processing, preservation and use of lithium metal have very high requirements for the environment. So lithium batteries have not been used for a long time. With the development of microelectronics technology at the end of the 20th century, more and more miniaturized devices have been developed, which put forward high requirements for power supply. The lithium battery then entered the large-scale practical stage.

4. Lithium metal battery is a kind of battery with lithium metal or lithium alloy as negative electrode material and non-aqueous electrolyte solution. The earliest lithium battery USES the following reaction: Li+MnO2=LiMnO2, the reaction is REDOX reaction, discharge.

5, square lithium ion battery is the most common lithium battery in life, it has many models, MP3, MP4, mobile phone, model aircraft and other products widely used.

Lithium batteries need to be activated, but that's what lithium battery manufacturers do, not what users do.

Before leaving the factory, lithium-ion batteries go through the following process:

Lithium ion battery shell infusion electrolyte - into - the seal, is constant voltage charge, and then discharge, so for several cycles, the electrode fully infiltrates the electrolyte, fully activated, in so far, capacity requirements - this is the activation process capacity, is to test the capacity of the battery to select different performance (capacity) classifies the battery, to differentiate the level of the battery, the capacity matching, etc. So the lithium ion battery to users is the activation of. All of us the same is true of the nickel cadmium battery and nickel metal hydride batteries used to activate after the factory. Some of the activation process of the battery need batteries in the open Mouth state, seal again after activation, this process can only be completed by the cell manufacturer.

In the use of lithium battery should be noted that the battery after a period of time will enter the dormant state, at this time the capacity is lower than the normal value, the use time will also be shortened. But lithium battery is very easy to activate, as long as after 3-5 normal charge and discharge cycle can activate the battery, restore the normal capacity. Due to the characteristics of lithium battery itself, it has almost no memory effect. Therefore, the new lithium battery in the user's mobile phone does not need special methods and equipment during the activation process. Not only in theory, but in my own practice, the "natural activation" approach of standard charging from the beginning is the best.

For the lithium battery "activation" problem, many people say: charging time must be more than 12 hours, repeated three times, in order to activate the battery. This "first three charges to charge more than 12 hours" is obviously a continuation of the nickel battery (such as nickel cadmium and nickel hydrogen) claims. So this kind of saying, can say to be misrepresented namely at the beginning. The charge and discharge characteristics of lithium battery and nickel battery are very different, and it can be very clear to tell you that all the serious and formal technical data I have looked up emphasize that overcharge and overdischarge will cause great harm to lithium battery, especially liquid lithium ion battery. Therefore, it is best to charge according to standard time and standard method, especially do not charge more than 12 hours. Generally, the charging method described in the operating instructions is the standard charging method.

At the same time, long charging takes a long time and often takes place at night. In China's power grid, the voltage at night is relatively high and fluctuates greatly in many places. Having said that lithium batteries are delicate, they are much less resistant to fluctuations in charge and discharge than nickel ones, which poses additional risks.

In addition, another aspect that cannot be ignored is that lithium battery is also not suitable for over discharge, over discharge on lithium battery is also very bad.

Tools/materials

Lithium battery, nimh battery, lithium battery charger, nimh battery charger

Steps/methods

When to start charging in normal use

You can often see this statement on BBS, because the number of charge and discharge is limited, so the battery should be used up as much as possible to recharge. However, I found an experimental table about the charge and discharge cycle of lithium ion battery, and the data about the cycle life are listed as follows:

Cycle life (10%DOD) : >1000

Cycle life (100%DOD) : >200

DOD stands for discharge depth. As can be seen from the table, charging times are related to discharge depth, and the cycle life of 10%DOD is much longer than that of 100%DOD. , of course, if the conversion to the actual charge relative to the total capacity: * 1000 * 200 = 200 = 100100%, 10% of the latter to fully charge and discharge is still relatively good, but in front of the net friend of the idea to do some correction: under normal circumstances, you should have a reservation, according to the principle of battery remaining power run out to refill charging, but if your batteries in your expected to 2 days can't stick to two hours of time, you should start charging in a timely manner, of course, if you are willing to carry the charger to the office when BieLun again.

You need to charge to cope with expected inconveniences or unrechargeable conditions, even if the battery has a lot of power left, then you just charge in advance, because you don't really lose "1" charge cycle life, which is "0.

The principle of recharging after a battery has run out of juice is not to take you to extremes. As widespread as long charging is, "use up as much battery power as you can, preferably with an automatic shutdown." This is really just a nickel battery, designed to avoid memory effects, but unfortunately it also works on lithium batteries. Due to excessive discharge, the battery voltage is too low, so that it does not have the normal conditions for charging and starting up.

The right thing to do with lithium batteries

To sum up, my most important tips on the charging and discharging problems of lithium batteries in use are as follows:

1. Charge according to standard time and procedure, even the first three times;

2, when the power is too low, should try to start charging in time;

3. No special method is required for the activation of lithium battery, which will be activated naturally in normal use. If you insist on using the popular "first three 12-hour long charging and activating" method, it won't actually work.

Therefore, any pursuit of 12 to 16 hours of ultra-long charging and automatic shut-down of lithium batteries is wrong. If you have done something wrong before, please correct it before it is too late.

Matters needing attention

Under the condition of good protection and control circuit quality of original charger, the protection of lithium battery is quite guaranteed. Therefore, the understanding of charging rules is the key, and some concessions can be made in some cases. For example, if you think your battery needs to be recharged before you go to bed at night, you can start recharging before you go to bed. The point is that you should know what the right thing to do is and not try to do it the wrong way.

The page contains the contents of the machine translation.