Interpretation of the memory effect of nickel-cadmium batteries

Explanation of the memory effect of nickel-cadmium battery The battery memory effect refers to the phenomenon that the battery is a nickel-cadmium battery, which is not fully charged or discharged for a long time, which will easily leave traces in the battery and reduce the battery capacity. Batteries are used as a way of recalling the range and form of users' daily charging and discharging. This form is difficult to change over time, and can no longer be charged or discharged. Lithium batteries do not have this effect. The reason for this is that the cadmium particles are thick in the traditional negative electrode sintering process. The nickel-cadmium battery is charged from scratch before being completely discharged. The cadmium particles are simply assembled into blocks when the battery is discharged to form a secondary discharge channel. The battery stores this discharge channel and uses it as the discharge endpoint of the next cycle, although the battery's own capacity allows the battery to discharge to a lower channel. The battery will only remember that this low capacity will be discharged in the future. In addition, in each use, any incomplete discharge will deepen this effect and reduce the battery capacity. The memory effect battery recall effect refers to the reversible failure of the battery, that is, the performance of the battery can be recovered from the failure. The battery will actively adhere to this specific trend after a long period of specific work cycle. The earliest meaning of this is that in nickel-cadmium batteries, nickel-cadmium pouch batteries have no recall effect, and sintered batteries have a recall effect. This means that the battery is like remembering the user's daily charge and discharge in the same range and form. It is difficult to change this form over time, and it can no longer be charged or discharged. The meaning of the memory effect of the current nickel metal hydrogen (usually called nickel metal hydride) battery is not restricted, but it has inertia. The first activation several times, generally can be charged and discharged 300-500 times, and then you will find that the time changes It gets shorter and shorter, and you want to change the phone. Storing old batteries in the refrigerator for a few days and then using them again can improve performance. Due to the traditional sintering process of the negative electrode, the cadmium particles are thick, and the nickel-cadmium battery is charged from zero before being completely discharged. The cadmium particles are simply assembled into blocks when the battery is discharged, forming a secondary discharge channel. In order to eliminate this effect, there are two methods, one is to choose a small current deep discharge (such as 0.1C to 0V), and the other is to choose a high current charge and discharge (such as 1C) several times. In practice, the method to eliminate the recall effect is a strict specification and operation process. Improper operation can be counterproductive. It is about the protection of nickel-cadmium batteries, normal and on time: deep discharge uniformly every month (or 30 times cycle) of deep discharge (discharge to 1.0V/day, or exercise, always use photovoltaic cells or use the method, Such as turning off can reduce the memory effect, but this is not exercise, because the instrument is not used (such as mobile phones) 1.0V/turn it off every day, special equipment or completion of homework is required, but fortunately, many nickel-metal hydride battery chargers have this function The battery stores this discharge channel and uses it as the discharge endpoint of the next cycle, although the battery's own capacity allows the battery to discharge to a lower channel. The battery will only remember this low capacity to discharge in the future. In addition, every time During the second use, any incomplete discharge will deepen this effect and reduce the battery capacity. Statement: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous article: Lithium battery exploded, what is it? Who is playing tricks?