What is the reason that deep discharge will shorten the battery life

1. When the utilization rate of active materials increases during deep discharge, the volume change also increases. With the addition of active materials for chemical reactions, a great burden is placed on the plate. The deeper the discharge, the greater the internal resistance of the battery. When the discharge current increases, the temperature rises and the charging time becomes longer. As the charging current increases, the temperature further rises, forming a vicious circle. 2. Charging at high temperature will promote the corrosion of the positive plate grid and the refinement of active materials, which will temporarily increase the capacity, but it is also the reason for the shortened battery life. 3. There is only a small amount of discharge in a day, and when it is charged after a few days, it is called intermittent discharge. During the rest time after discharge, the sulfuric acid is absorbed by the plates, and the battery capacity on the surface is briefly restored. However, repeated occurrences of this situation will cause deep discharge, and attention must be paid. In addition, when the specific gravity of the electrolyte is low (over 75% of the discharged state), it will be stored for a long time (over 24 hours) because the active material cannot be activated, which will shorten the life. Lead-acid batteries have a memory effect. Part of the power is often used and then fully charged. The battery memory effect will cause part of the battery to be unable to discharge and reduce the power. Some riders forget to turn off the lights, etc., and then fully charge the battery after using up the battery, they will find that the battery life is reduced, but this behavior is exactly the deep discharge and charge of the lead-acid battery, which should be considered normal Maintenance means. Based on the current situation provided by car friends, it seems that car batteries have characteristics similar to lithium-ion batteries, and the battery life is drastically reduced after deep discharge. A regular deep discharge of lithium-ion batteries is beneficial to activate lithium-ion batteries and can slightly increase the capacity of lithium-ion batteries. Perform a full discharge of the lithium-ion battery on a regular basis. The full discharge is the first undervoltage protection after cycling under normal load conditions on a flat road. After the first undervoltage protection of the lithium-ion battery, the voltage of the lithium-ion battery will rise after a period of time and return to a non-undervoltage state. At this time, if the battery is used again, the lithium-ion battery will be very harmful. Fully charging the lithium-ion battery after the complete discharge will feel the capacity of the lithium-ion battery has increased. The effect of the depth of discharge on the lithium-ion battery is: the deeper the depth of discharge, the easier the life of the lithium-ion battery is to shorten; the other aspect is the performance on the discharge curve. The deeper the discharge, the more unstable the voltage and current. Depth of discharge is closely related to voltage and current, which can be said to be expressed in voltage and used in current. Under the same discharge system, the smaller the voltage value, the deeper the discharge depth. If the battery is not fully charged frequently, the battery will have a kind of memory, which will affect its continuous mileage and also consume the battery life. Lithium-ion batteries are rarely fully charged when they are just purchased. Long storage time will reduce the capacity of lithium-ion batteries. In addition, it is important to choose a better quality protection board. Pay attention to these points, your lithium-ion battery will be no problem for five or six years. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Why is lithium ion battery easy to catch fire when charging?