Lithium ion battery, how much you know?

Ni-MH battery main features:
1． Ni-MH battery energy density than nickel-cadmium batteries twice as large;
2.can reach 500 times the full cycle of charge and discharge;
3. using a special charger can charge one hour quick charge;
4. self-discharge characteristics of a good than the nickel-cadmium batteries, charge can be retained after a longer period;
5. up to three times the continuous and efficient discharge; can be applied range: cameras, video cameras, mobile phones, cordless phones, walkie-talkies, laptop computers, PDA, a variety of portable devices and electric power tools.
nickel-cadmium batteries
Nickel-cadmium batteries can be repeated in more than 500 charge and discharge, economic and durable. Its internal resistance is small, both the internal resistance is small, fast charge, but also to provide high current load, and the discharge voltage change is very small, is a very good DC power supply batteries. Compared with other types of batteries, nickel-cadmium batteries can withstand overcharge or over discharge. Nickel-cadmium battery discharge voltage is different according to their discharge device, each unit cell (Cell) is approximately 1.2V, the battery capacity of units of Ah (AH), mAh (milliamp hours), discharge voltage limit, said the termination of to "discharge termination voltage", nickel-cadmium battery discharge termination voltage 1.0/cell (cell for each cell batteries).
Self-discharge rate is low, nickel-cadmium batteries were placed in long cases, properties do not deteriorate after fully charging the full restoration of its original features, it can be -20 ℃ +60 ℃ temperature range. As the unit cell using metal containers, sturdy and durable; completely sealed manner, does not appear electrolyte leakage phenomenon, there is no need to add electrolyte. To improve battery performance and extend battery life The key is to avoid memory effect and excessive discharge. Nickel-cadmium batteries have memory effect, namely, nickel-cadmium power in several low-volume after working under the charge and discharge. If you want to conduct a large-capacity charge and discharge, the battery will not work, this shall be memory effect (Memoryeffect).
Memory effect makes the discharge termination voltage is set higher video recorders, camcorders, with the lower operating voltage, battery capacity of the surface, also with the reduced, but the discharge voltage reduction may be one or two fully discharge caused by the temporary phenomenon. Memory effect makes the performance of the battery can not be brought into full play, but also cause great inconvenience to the shooting. Thus, in use should pay attention to the use of the charger with a charge-discharge performance, such as Sony's BC-1WDCE, to avoid the memory effect of the production, such as the use of general charger BC-1WA, BC-1WB, it would be about 10 times After the charge to conduct a discharge, but also can reach the purpose to prevent the memory effect.
For nickel-cadmium batteries, each unit cell (Cell) voltage is 1.2V, therefore, 12V there are 10-cell battery (Cell) composed of 13.2V on Cell from 11 composed of the capacity of the battery to full state of charge-discharge to each unit cell (Cell) of 1.0 to represent, such as NP-23, NP-40, BP-95 suffix shall be the capacity figures are 2.3Ah, 4Ah, 9.5Ah and so on. Discharge termination voltage and full discharge does not mean that a unit cell voltage 0V, each unit (Cell) battery discharge to 1.0V means that when the over-discharge, over-discharge the battery will be there should be no damage, should be avoided.
lithium batteries
Newly-to-market with a large-capacity lithium battery, high-density, compact lightweight features. Because it has the NP-type battery is compatible with the size of other existing specifications and other particular specification, the user is very convenient in use. Because it is an ideal environment pollution-free batteries, which is characterized by: high energy, its energy is high-capacity nickel-cadmium battery 1.5 times; high density, the density of nickel-cadmium batteries two times the average working voltage is 3.6V . Operating voltage flat and large capacity, so that the camera can run uninterrupted for several hours of work, the load characteristics can be reflected in the 2C discharge, greatly satisfied the conditions in the emergency use. It can be a large temperature range, operating, discharge temperature range up to -20 ℃ +60 ℃.
Lithium battery is an excellent ideal battery, it is economical and practical, flexible, convenient, general shooting 1-2 batteries can now be responsible for the entire mission, but it impatience Overcharge, over-discharge and excessive current, so when excessive voltage and current of the passage is easy to produce short-circuit phenomenon, may also lead to dangerous, causing bodily injury and battery scrap, so lithium batteries are generally set up to protect the circuit, just in case the battery can be incorrectly used or charger to poor condition lead to too much voltage is passed, the circuit can be automatically cut off the circuit to ensure that the batteries and equipment safety and to avoid bodily harm. When used in the battery warning indicator light flashes when the timely replacement of new battery, should try to avoid excessive discharge, the non-10000 in unusual circumstances not to 2C discharge. As much as possible so that the battery used in the specifications. Lithium battery charging can accurately display the current charge amount, but also has the residual capacity display, LED section in order to express their residues. Durable and lightweight high-performance lithium batteries flexible, and greatly facilitate the television crews filming and Creation. Large capacity lithium battery, long life, pollution-free, light weight, no memory effect, self-discharge rate is low, high temperature or low temperature, can be used in a wider area, but are expensive and need to use a dedicated charger.
use and maintenance of batteries
Battery life is the use of a period of time, the charge-discharge capacity fell to 80% of the nominal capacity prior to the charge and discharge times they are not charging and discharging or complete failure is the battery life; self-discharge rate refers to the battery fully charged after Place the case of a long time without the slow self-discharge phenomenon. Self-discharge rate is low that a long time, after placing a small decline in capacity.
For the shoot out a program or news coverage, generally the use of portable video recording devices, and portable video recording devices supporting the use of batteries, whether efficient, high-quality work carried out to ensure continued long-term smooth filming the crucial link. The normal functioning of the battery with our TV, audio-visual education workers in their daily work in the proper use and careful maintenance are closely related, so the use and maintenance issues should arouse our attention.
1.in their daily work, it should be familiar with their own type of battery, it has the basic characteristics and performance. This guide us in the proper use and maintenance, is of great significance, for extending the battery life is also extremely important.
2.charging at room temperature is best controlled at between 10 ℃ -30 ℃, the right temperature higher than 30 degrees Celsius is best to take measures to avoid overheating occurred due to internal deformation of the battery; room temperature below 5 degrees Celsius, it will result in charging inadequate, affect the battery life.
3.the battery after a period of time after use, due to varying levels of discharge and aging of the existence of more or less inadequate charging and performance decline, under normal circumstances nickel-cadmium batteries can be about 10 times the charge and discharge cycles were followed by a one-off charge. Approach is to extend the charging time than the normal charge time extended approximately doubled. Specific examples are as follows: With SONY's BC - 1WA (B) Charger for NP-1 battery, in the green light flashes when fast charging, the green light stops flashing light when the fast-charge end of a long charge bit by bit began bit by bit to extend the charging time, charging time bit by bit over charging time, over 3-4 hours recharge time is appropriate.
4. the battery charge and discharge should be strictly in accordance with requirements and standards, avoid long-term overcharge, over-discharge, or charge less frequently. Does not completely discharge the battery when using the long-term or short-circuit for small current depth of discharge is caused by the battery capacity decline in life expectancy shortened important factor. Over time the use of action would not only affect illegal to use, but will certainly affect the battery capacity and life span.
5. in the popular BC-1WA (B) charger, the battery charging process should be a complete power failure can not be half-way or at the end of fast charging, the battery in a high-temperature state, re-connect the power, making quick battery charger once again charge, the results would impose an excessive charge. In use indicator flashes when the battery warning alarm, they should replace the batteries in time to avoid excessive battery discharge.
6. nickel-cadmium batteries Needless to charge when not in use a long-term preservation, however, it must discharge to the termination of the battery voltage (a video camera battery warning lights flashing) may be stored in the original packing carton packaging or cloth, paper packaging, the place dry ventilation Department store.(Come from:www.all-power-accessories.com)