The main performance indicators of rechargeable batteries

The main performance indicators of rechargeable batteries

Safety performance of the battery failure is unacceptable. One of the greatest impact is the explosion and leakage. Explosion and leakage of the battery occurred mainly with the internal pressure, the structure and process design (such as a safety valve failure, there is no lithium-ion battery protection circuit, etc.) and should be prohibited by incorrect operation (such as the battery into the fire) the. Refers to a certain discharge conditions, the apple laptop battery can be released from the total power consumption. In accordance with the IEC standard and GB, nickel cadmium and nickel metal hydride batteries in the 20 ± 5 ° C conditions, the 0.1C charge for 16 hours after discharge 0.2C to 1.0V out of electricity when the battery's rated capacity, expressed in C; lithium-ion batteries at room temperature, constant current (1C), constant voltage (4.2V) under the conditions of 3 hours after charging to discharge 0.2C to 2.75V when the battery out of power for the rated capacity. The unit of battery capacity mAh and Ah (1Ah = 1000mAh). To AA 2300mAh Ni-MH rechargeable apple a1175 battery as an example, that the battery in order to 230mA (0.1C) charge 16 hours to 460mA (0.2C) discharge to 1.0V, the total discharge time of 5 hours, the release of the electricity for the 2300mAh. Correspondingly, if the discharge current of 230mA, the discharge time is about 10 hours a day. Refers to the internal resistance of battery current flow when the battery internal resistance. Small internal resistance of rechargeable batteries, the need for specialized equipment used can be measured more accurate results. General knowledge of the battery charge state resistance is resistance, meaning that the battery internal resistance when fully charged (which corresponds to the internal resistance of the discharge state that after the battery fully discharge resistance. In general, the discharge state resistance charge-state resistance than the large, and not very stable). The greater the internal resistance of batteries, the battery itself consumes more energy, more efficient use of battery low. A lot of resistance when the battery charge is very much heat, so that the battery temperature rises rapidly. On the impact of batteries and chargers are great. With the increase in the number of battery life, due to the consumption of electrolyte and battery internal chemical activity in the reduction of the internal resistance of the apple a1185 battery will be increased to varying degrees. The poorer the quality of the faster rise in the battery. Cycle life batteries that can be experienced in the number of repeated charge-discharge. Battery life and capacity into the reverse relationship, in general Ni-MH battery cycle life of more than 500. High-capacity apple m8403 battery life is shorter, but more than 200. Cycle life and charge also closely related to the release conditions, in general the greater the charge current (faster charging), the shorter the cycle life. Maintain the ability to charge that is often talked about self-discharge, is the open state, the battery storage of electricity under certain environmental conditions to maintain the ability. Mainly by self-discharge battery materials, manufacturing process, storage conditions, and many other factors. Usually the higher the temperature, the greater the self-discharge rate. Rechargeable battery to some extent the self-discharge is a normal phenomenon. For example in nickel-hydrogen Apple PowerBook G3 M7572 Battery, IEC standards, after fully charged battery at a temperature of 20 ± 5 ° C, humidity of 65 ± 20% conditions, the open-shelved within 28 days, 0.2C discharge time shall be not less than three hours (that is, the remaining power greater than 60%). Lithium-ion batteries and dry cell battery is much less self-discharge. That is, the capacity of large current discharge. Digital cameras, power tools, electric toys, such as electric appliances in particular need excellent large current discharge performance of a ,apple a1012 battery ,apple a1079 battery , apple a1078 battery , apple a1148 battery. High-current discharge performance of primary and battery-related materials and production process.