On some basic knowledge of rechargeable battery!
Release date：2014-06-18 09:51 Source：本站 Click：浏览次数：
Before because no understanding of rechargeable batteries, coupled with improper use, rechargeable battery in the home life is not long, mobile phone battery is also broken down two blocks. Read the following article, feel very helpful!
Rechargeable battery knowledge
Ni MH battery also has a memory effect, but no nickel cadmium batteries obviously. The most obvious is the memory effect of lithium battery.
The memory effect is not obvious means, can be repeatedly charged, even every run out of charge and will not have the too fight. Therefore, the use of nickel metal hydride battery
In general, can not consider discharging and charging directly.
Of course, from the point of view of prolonging the service life of, in the charge discharge 30-50 times, can do a depth of discharge, to maximum capacity to restore.
Discharge is not as simple as that of AUDIOPHONE, a small bulb, until no light can. To do so would tend to excessive discharge, anti
And damage battery.
As we all know, rated voltage section of Ni MH battery was in 1.2V, when just full of electricity is actually larger than this value, generally in the 1.4-
Between 1.5V. With the use of, the voltage will be gradually reduced, in general the use of occasions, when the voltage is lower than 1V, basically can not be used, for example
WALKMAN, CD DISKMAN, MD, MP3, DC and so on. You can test it out yourself "how much is the battery voltage out".
But if you use the occasion is a low voltage, small current will continue to discharge. Depth of discharge we say generally refers to the voltage drop to
Between 0.85V-0.9V. Through the low voltage, discharge of small current, achieve the value of the time, Ni MH battery (including nickel cadmium) can restore to the maximum
Capacity, prolonging the service life. But if you continue to discharge, if less than 0.8V is likely to result in irreversible damage to the battery, but is affected
Battery life. This is why AUDIOPHONE method is not recommended, because you can not control voltage to a certain value is automatically stopped
Check. Similarly, NiCd and NiMH batteries are not recommended for small current electric remote control such.
Better methods of battery depth of discharge is the purchase of a discharge of the functions of the charger or specialized discharger. The most simple method that can be used
The AUDIOPHONE method, but must often use the table read voltage value, once into the danger zone immediately stop.
If is a series of simple words, the voltage value is multiplied by the number of batteries can be.
Again, without long-term cell preservation and restoration method. Note that, because the NiCd and NiMH batteries of different characteristics, so to save the party
Method different leaf. Nickel cadmium battery is to run out to save electricity, so the new nickel cadmium battery everybody before buy is basically no electricity, need to own.
Generally speaking, using the correct charging method, probably need to charge and discharge of 3 - 5 can be recovered to the best state of battery. And nickel metal hydride batteries to long-term
Before storage, should be charged to about 80% (the people of their own should count), and then save. This is why now buy new nickel hydrogen battery back
After a somewhat electrical reasons, because manufacturers have been precharged, prevent the transport turnover time is too long, and the battery is affected by. Long term preservation
When Ni MH battery used, first the residual electricity runs out, then the correct method of charging and discharging 2 - 3 can be recovered to the best state.
To say that about charging problem. In fact, the most difficult to grasp is the correct charging.
Charging from the charging current, there is difference between fast charging and slow charging.
From the charging mode, the difference between constant current charging and pulse charging.
Many people have this problem, whether it is good or slow charging good fast charge.
Then we first look at what is the fast charge and what is the slow filling. With the nominal capacity of a battery in the charging current is 1C, 0.10.2C is slow
Charge, >0.2C for fast charge, >0.8C for the super fast charging, < = 0.05C is the trickle charge. In Ni MH battery 1400MAH section as an example,
The charging current in 140MA - 280MA between the slow charge, and the same 280MA charging current to a section of the 700MAH battery is the fast charge. By
This shows that the fast charge or slow charging is a relative concept, and the battery itself has a capacity of maximum correlation.
Go back to the previous question, what is the good fast or slow?! In fact this is no fixed answer. Many people think that slow, think fast charge
Will damage the battery. The fast charge will damage the battery? The answer is yes, but the reason is not a lot of people think "high current charging damage battery". Big
Current is at best an accomplice, the real reason is the fever, fever caused due to the large current. High temperature has great influence on the service life of the battery.
So large current is not terrible, headache is how to solve the heating problem.
Here, we will introduce the constant current charging and pulse charging concept. In the slow charge, basically all the charger adopts constant current charging
Method, so that the circuit design is simple, easy to realize. And because the charging current at slow speed range, and will not cause the battery overheating problems. Arrived
With the fast charging current problem, then use a constant current mode, will be unable to avoid the battery overheating problems, so the constant - current method was abandoned. Take
Instead of this pulse, the waveform can be seen, the charging current output is not a straight line, but a sine wave. Wave, current maximum,
And then immediately into the trough, almost no electricity