Monday, November 23, 2009
Ni-Cd Batteries,Ni-MH Batteries,Li-ion Batteries
Ni-Cd Batteries,Ni-MH Batteries,Li-ion Batteries
Nickel cadmium cell (Ni-Cd, Nickel-Cadmiun Batteries):
The nickel cadmium cell is applies early equipments like handset, notebook battery types and so on, it has the good big electric current flashover characteristic, to bear the charging and discharging ability to be strong, the maintenance is simple. The nickel cadmium cell most fatal shortcoming is, Users offen encounter "memory effect” in charging and discharging process, will cause the service life big reduction. In addition, the cadmium is virulent, thus the nickel cadmium cell does not favor the ecological environment the protection. The numerous shortcomings cause the nickel cadmium cell to eliminate basically the digital equipment battery’s application scope. Nickel hydrogen battery (Ni-MH Batteries): The nickel hydrogen battery is the early nickel cadmium cell’s substitution product, it is at present the most environmental protection battery, no longer uses the virulent cadmium, may eliminate the heavy metal element the contamination concern which brings to the environment. The nickel hydrogen battery has the big energy density compared to, this means may, in does not increase the additional weight for the digital equipment in the situation, the use nickel hydrogen battery can lengthen equipment’s operating time effectively. Simultaneously nickel hydrogen battery in electricity characteristic aspect and nickel cadmium cell also basic similar, when practical application definitely may substitute the nickel cadmium cell, but does not need to make any transformation to the equipment. Nickel hydrogen battery another merit is: Reduced in the nickel cadmium cell to have “the memory effect” greatly, this enabled the nickel hydrogen battery to be possible to use conveniently. (above to quote part) Individual viewpoint: In the life, myself do not use the disposable battery nearly, because both economy, and environmental protection. Looking from the life use experience, the nickel cadmium cell’s use environment request is not very harsh, but must carry on the maintenance frequently. Because of the serious memory effect, its memory effect returns to 20-30 times in not the standard service condition achieves above 70% (electric power storage ability only then original 70%). Certainly if each time uses pays attention to some, may after about over a hundred times only then achieve the degree which is unable to endure patiently. As for the nickel hydrogen battery, individual feeling also has the part the memory effect, but compared to nickel cadmium many, therefore use time cannot be too optional. Although has the interpretation of data nickel cadmium use number of times to be possible to reach 500 times, the nickel hydrogen may reach 1000 times. But I thought that in the daily use cannot achieve this number of times far. The nickel hydrogen (the memory effect already was quite probably serious about 300. Because very long did not use the nickel cadmium cell, therefore not good statement). mAh is the Unit of electricity, 1mAh=3.6C (coulomb). The value is bigger, showed its can store up the electric quantity are more. Certainly, he saves the electrical energy cannot use completely. The nickel cadmium cell’s standard electromotive force is 1.33V, the rated voltage is 1.2V, when sufficient electricity the open-circuit voltage may reach above 1.4V, the final voltage 1.0V. nickel hydrogen battery’s standard electromotive force is 1.319V, the rated voltage is 1.2V, final voltage 1.0V. May see accumulator cell’s shortcoming from the above data to lie in the working voltage to be lower than 1.5 volts. Because the itself voltage is low, in addition its interface resistance when the rapid discharge the very quick rise (said simply will be stepping down of voltage), its terminal voltage when it will not have the electric discharge finished to be lower than with electric appliance’s voltage limits (in full electric discharge situation, Ni-MH terminal voltage about 1.0, dry cell battery about 1.25). Will also be in the daily use we will feel that the accumulator cell will be inferior to the dry cell battery easy to use reason, but this reason also directly caused the electric discharge not to be full, aggravating memory effect. In the synthesis, the Ni-MH battery compared the Ni-Cd battery, had many merits, although the price was slightly high. The use suggested personally: Regarding the request high speed electric discharge’s equipment, should better use the Ni-MH battery in a short time, like the remote control electrical toy, four go by car and so on. In addition: Flashing light exception. Because will discharge high speed will have the very bad influence to battery’s chemical substance activeness, therefore, will discover very quickly flashing light’s duration of charging will be getting more and more long. Regarding requests to have the length time electric discharge equipment, if the personal stereo (shows likely such uses any battery line with electric appliance). Regarding the request discharge voltage is stable, and the high equipment, like the avonmeter, the digital camera, CDplayer and so on, should better use the dry cell battery.
Howerever, Widgets like notebooks, cell phones , Music players and so on, All carry with a li-ion battery, Brand like panasonic use Panasonic DMW-BM7 battery
Panasonic CGA-S005 battery
Panasonic CGA-S006 battery
Panasonic CGA-S007 battery for their digital cameras.