How does aluminic acid battery work?

1. Know the memory effect

2.The battery needs to activate?

3. The first three minor charge 12 hours

4. Rechargeable batteries have a best

5. Is it really the charging current, the greater the charge the faster

6. Fill continuously target output current is equal to the charging current

7. Less circulation charge and discharge time is a life

8. The battery capacity is higher, the better

9. Charge the battery for storage

10. The green light charger in charge for an hour more useful in the future

11. A charge than direct charge

1. The memory effect (mainly talk about the nickel cadmium and nickel metal hydride batteries, are not interested in can skip directly to see 2)

Battery memory effect refers to the reversible battery failure, namely the performance of the battery can be reactivated after failure. Memory effect refers to the battery for a long time through specific work cycle tends to keep this particular automatically. The first definition in nickel cadmium battery, bag of cadmium nickel battery no memory effect, sintering type battery memory effect. Now the nickel metal hydrogen (commonly known as nickel metal hydride battery is not subject to the constraints of the definition of memory effects.

Because modern nickel cadmium battery technology improvement, the memory effect has been greatly reduced, and the other a phenomenon to replace the definition, is the "grid" nickel-based batteries, generally, the nickel cadmium battery comprehensive influence by these two effects, while Ni-Mh batteries only because of the influence of "lattice" memory effect, and the nickel cadmium battery for small effect.

In practice, the method of elimination of memory effects has strict specifications and an operating process. Improper operation will be counterproductive.

For nickel cadmium battery, the maintenance of normal is deep discharge on a regular basis: the average use for a month (or 30 times circulation) on a deep discharge (discharge to 1.0 V/per day, foreigners called exercise), common use is to use photovoltaic cells or use the means such as shutdown can reduce the formation of the memory effect, but this is not exercise, because the instrument (such as mobile phone) is not used 1.0 V/only to turn it off every day, must be special equipment or line to finish the work, fortunately, many of Ni-Mh battery charger with this function.

For no nickel cadmium battery to exercise for a long time, because the cumulative memory effect, can't reply in exercise capacity, then you will need to further discharge (foreigner recondiTIon), this is a very small current for a long time for each section to 0.4 V battery discharge of a process, need professional equipment.

For nickel metal hydride batteries, exercise on the frequency of about once every three months can effectively relieve the memory effect. Because the cycle life of Ni-Mh battery is below the nickel cadmium battery, with little recondiTIon this method.

Bring about suggestion 1: every time there is no need to charge the battery before discharge, and it is harmful, because useless shorten the life of the battery.

Bring suggest 2: use a resistor connect is the cathode of the battery discharge is not desirable, can't control current, easy to 0 v, even lead to series of battery cell polarity reversal.

2. Need to activate the battery?

Answer needs to activate the battery, but this is not a user to do. I have ever visited lithium ion battery facilities, lithium ion battery before leaving the factory to 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 out of the lithium ion battery to user hand is already activated. We are all the same is true of the nickel cadmium battery and nickel metal hydride batteries commonly used to activate after leaving the factory. Some battery activation process needs to be in the open state, activate again after sealing, this process also can only have batteries manufacturers to complete.

There is a problem, is the battery cell factory to a user's hands, this time is very long, sometimes short, 1 month, long half a year, this time, because the battery electrode material passivation, so the factory suggest to use for the first time the battery is best for 3 ~ 5 times completely filling process, in order to eliminate the passivation of electrode material, to achieve maximum capacity.

In 2001 three of nickel metal hydride. Nickel cadmium and the national standard of lithium ion batteries, the capacity of its initial tests are specified, the battery can be five deep charge deep discharge, when once conform to the rules, test can be stopped. This very good explains this phenomenon I said.

Taken the so called "second activation" may be used, the user first use of the "new" batteries do deep filling put several times as much as possible.

Low however, according to my test (for lithium ion battery), storage period within 1 ~ 3 months of lithium ion battery, for its deep charge deep discharge cycle processing, its capacity to improve phenomenon almost non-existent.(I'm special discussion about battery activation test report)

3. The first three minor charge 12 hours?

This problem is closely related to the battery activation of the above problems, let's set up the factory to the user's hands have batteries electrode passivation phenomenon, in order to activate the battery for deep discharge loop three times. Is actually the problem is transformed into deep filling is to charge for 12 hours. Then another of my article "theory of mobile phone battery charging time" has answered the question.

U u u the answer is not to need to charge for 12 hours.

Early mobile phones Ni-Mh batteries because of the need to supplement and trickle charging process, to achieve the perfect state of charge, may need 5 hours or so, but also do not need to 12 hours. The constant current constant voltage charging characteristics of lithium ion battery is determines its deep charging time no need for 12 hours.

For lithium-ion batteries, someone will ask, now that the constant pressure stage of lithium ion battery current decreases, is when small current to an infinitesimal is real deep filling. I used to draw the curve of constant voltage phase current decreases with time, the curve fitting for many times, it found that the curve can be a function of 1 / x way, close to zero current actual testing for lithium ion battery itself exists self-discharge phenomenon, is never likely to reach the zero current.

600 mAh battery, for example, set up by the current of 0.01 C (i.e., 6 mA), it's 1 C charging time not more than 150 minutes, then set up by the current of 0.001 C (0.6 mA), the charging time for 10 hours - this because of the problem of the precision of instrument, has not obtained, but won the capacity from 0.01 C to 0.001 C for the calculation of only 1.7 mAh, to use more than seven hours for only less than three over one thousand of this capacity is no practical significance.

Besides, are there any other way of charging, such as pulse charging ways make the lithium ion battery to achieve the limit voltage of 4.2 V, it doesn't stop the minimum phase current judgment, generally after 150 minutes it is 100% full. Many mobile phones are used pulse charging mode.

Someone once display mobile phone charge, then use charger for charging to confirm the mobile phone charge level, this test method is not strict.

First detected charger shows a green light is not really a basis charge or not.

End to end testing of lithium ion battery charge or not is the only way to the final test without charge (discharge) state of lithium ion battery voltage.

So-called constant voltage phase current its real purpose is to gradually decrease in battery internal resistance for charging current and the additional voltage, when the current is small to 0.01 C, such as 6 ma, the current passenger and battery internal resistance (usually within 200 milliohm) only 1 mv, can be thought of when the voltage is no current state of the battery voltage.

Secondly, mobile phone reference voltage reference voltage is not necessarily equal to the seat charger, cell phone that charge the battery on the charger, seat charger but I do not think have charge, continue to charge.

4. Rechargeable batteries have a best?

One theory is that rechargeable batteries used properly, will be in a certain period of circulation in the best state, is the largest capacity. This will divide the situation, sealed nickel-metal hydride batteries and nickel-cadmium batteries, if properly used (such as regular maintenance, prevent the formation of memory effect and the accumulative), usually at 100 ~ 200 cycles to achieve its maximum capacity, such as production capacity of 1000 mAh Ni-Mh battery with a 120 - cycle, its capacity could reach 1100 mAh. Almost all of the Japan Ni-Mh battery manufacturers in the technical specification to describe the cycle properties of nickel-based batteries on the figure of I can see the description.

Taken the nickel-based batteries are best, generally between 100 ~ 200 cycles to reach its maximum capacity

For liquid lithium ion battery, but there is no such a cycle capacity hump phenomenon, from the lithium ion battery factory until finally dead batteries, the capacity of the performance is to use a little at a time. I do in cycle performance of lithium ion battery has never seen a capacity for signs of recovery.

Taken the lithium ion battery not best.

It is worth mentioning that the lithium ion battery are more susceptible to the change of environmental temperature and different performance, in the ambient temperature of 25 ~ 40 degrees will show their best performance, and low or high temperature state, his performance was a big discount. To make your lithium-ion battery fully demonstrate its capacity, must be careful attention to use the environment, to prevent the phenomenon of high and low temperature, such as mobile phone in the car on the front desk of the midday sun point-blank can easily make its more than 60 degrees, the users in the north of the battery standby time, the same network circumstances, there is no user in the south long.

The page contains the contents of the machine translation.