Comparative analysis of advantages and disadvantages of Ni-Mh battery and polymer battery

In recent years, the battery technology continues to progress and development, many excellent battery types constantly poured into the market, also gradually applied to our life and work, people become more and more impossible not to use it.

Design of Ni-Mh batteries from the nickel cadmium battery, but on improving nickel cadmium battery memory effect, have great changes.Its major changes, in hydrogen storage alloy to replace the original use of negative cadmium, therefore Ni-Mh batteries can be said to be the typical representative of material innovation.Nickel metal hydride battery caused by the pollution, will be a lot less than containing cadmium nickel cadmium battery, therefore, the nickel cadmium battery has been gradually replaced by Ni-Mh batteries.

The lithium battery with a few have a lithium electricity can use outside (NIKONEN EL1 and 2 cr5) most of them are without batteries alternative solutions, this to want to go abroad for a long time, or a large number of users is very troublesome, nickel metal hydride batteries had no such problems, using digital cameras of Ni-Mh batteries can often use alkaline battery replacement.

Recent digital cameras use more and more use Ni-Mh batteries, battery manufacturers also bullish on the market prospects for development, have launched high capacity of nickel metal hydride rechargeable batteries, make Ni-Mh battery technology rapid development, capacity is becoming more and more big, use time and lithium batteries, even the charger is becoming more and more advanced, charging time shortened significantly.

Polymer lithium batteryDrive wave box and stable strength, endurance, long volume relatively than the above two kinds of cells take up little space.But need to pay attention to the use of polymer lithium battery items (please pay attention to remember) : the battery can not discharge (here that the battery of discharge means don't hit with fixed wave box), polymer lithium battery discharge will appear expansion or charge it into electricity, if appear this kind of circumstance the battery scrap, can no longer continue to use;In order to detect the lithium battery usually either in the battery box or a digital display chip installed on water guns, said the play water gun use lithium polymer battery first points and the parameters of the two common voltage: 7.4 V and 11.1 V, then the charge of 7.4 V parameters show that would be about 8.5 V;Charge of 11.1 V parameters shows that would be about 12.2 V.As far as I am using the experience of 7.4 V on the electricity doesn't do any action according to 6.70 V like this I will take charge, and 11.1 V to 10.20 V battery look like can take charge.

Ni-Mh batteries advantages

1, resistance to overcharge, discharge,

2, high discharge capacity is strong,

3, the use of safe, especially under the condition of abuse;

4, relatively cheap;

5, big power density

The disadvantage of Ni-Mh batteries

1, low voltage

2, low energy density

Polymer lithium battery

1, monomer battery working voltage of 3.6 v ~ 3.8 v is much higher than nickel-metal hydride and nickel cadmium battery voltage of 1.2 v.

2, capacity, density, and its volume density is nickel hydrogen battery or nickel cadmium battery 1.5 ~ 2.5 times, or even higher.

3, small self-discharge, placed in a long time after its capacity loss is very small.

4, long service life, normal use its cycle life can reach more than 500 times.

5, no memory effect, not empty battery before charging, easy to use.

6, safety performance is good.

Disadvantages of polymer lithium-ion battery

1, the cost is high, the battery electrolyte system purification is difficult

2, the need to protect line control, overcharge or discharge will make chemical battery internal reversible destroyed, thus seriously affect the battery life.

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