Nimh batteries can restore the memory effect of is what?

Source: 2020 - 04 - 12 21:33 hits: time what is recoverable memory effects of nimh batteries and lithium batteries, sealed nickel metal hydride batteries ( mh - ni) Repeat not fully charge and discharge loop, the voltage drop and capacity of the battery has the recoverability is reduced. Completely discharge the battery once, for example, and then a few times, a partial discharge reaches 1. 15 v and charging cycles. In the process of circulation, voltage and capacity gradually decreases, and then completely discharge the battery. Voltage is lower than the initial full discharge voltage of the battery. When the discharge to the initial termination voltage, the battery can't release their full capacity. This phenomenon is called voltage drop. Because batteries seem to remember a lower capacity, it is sometimes referred to as' memory effect. However, after a few charge and discharge, the battery can restore its full capacity, that is to say, mh - Ni battery with mild but recoverable 'memory effect. In recent years, you may often hear people say 'nickel cadmium and nickel metal hydride batteries for its memory effect is difficult to use the' or 'when battery memory effect starts, it is time to change the'. Does exist in some rechargeable batteries battery memory effect, its performance for rechargeable battery capacity decline phenomenon. The term is increasingly used to describe a similar situation, but it is not a permanent phenomenon. However, many users do not seem to understand it, the meaning of the following is the cause. Technically, the battery memory effect is a reversible battery failure. Memory effect refers to the work in a particular period after, in a very long period of time automatically keep a certain tendency. Packaged battery no memory effect. Sintering battery memory effect exists. If the battery after long shallow discharge cycle, so deep discharge, the capacity loss or voltage drop is the most obvious. Let's discuss about the elimination of memory effects, also is to make the battery charging method of normal charge, charging method is usually used. After a full charge, with large current discharge termination voltage, and then use a small current discharge fully discharge, then pretend to a constant current 0. 1 c5a more than 20 h to ensure that meet the demands of full charge the battery positive and negative electrodes, and then fully discharge discharge according to the conventional discharge. Memory effect can be eliminated by repeatedly charging and discharging. The cause of the voltage drop is part in shallow charging or discharging, only part of the active substances in discharge and recharge. Was not involved in the cycle of change the physical properties of the active material, battery resistance increased. Through complete charge and discharge cycle, can make active material return to the initial state. The degree of voltage drop and the capacity loss depends on the depth of discharge. When the discharge to the termination of high voltage, this kind of phenomenon is obvious. When the terminal voltage of 1. 15 - 1. 10 v, the loss is very small. If the terminal voltage is lower than 1. 1 v, after discharge will not appear in the process of storage capacity and voltage drop down. Memory effect is related to the discharge rate. For a particular discharging termination voltage, the higher the discharge rate, the smaller the depth of discharge, the less active substance involved in the cycle, the greater the capacity loss.