Explanation of battery charging terms

C is the first letter of Capacity, which is used to indicate the magnitude of the current when the battery is charged and discharged. For example: when the rated capacity of the rechargeable battery is 1100mAh, it means that the discharge time of 1100mAh (1C) can continue for 1 hour. For example, the discharge time of 200mA (0.2C) can continue for 5 hours. The charging can also be calculated according to this comparison. Cut-offdischargevoltage refers to the lowest working voltage value when the battery discharges, the voltage drops to the battery which is no longer suitable for continuous discharge. According to different battery types and different discharge conditions, the requirements for the capacity and life of the battery are also different, so the specified terminal voltage of the battery discharge is also different. Open circuit voltage (OpencircuitvoltageOCV) When the battery is not discharged, the potential difference between the two poles of the battery is called the open circuit voltage. The open circuit voltage of the battery varies according to the materials of the battery's positive, negative and electrolyte. If the materials of the battery's positive and negative electrodes are exactly the same, then no matter how large the battery is, how the geometric structure changes, the open circuit voltage will be the same . Depth of Discharge (DepthofdischargeDOD) In u200bu200bthe process of battery use, the battery's discharge capacity accounts for the percentage of its rated capacity, which is called the depth of discharge. The depth of discharge has a deep relationship with the charging life of the secondary battery. When the depth of discharge of the secondary battery is deeper, the charging life will be shorter. Therefore, you should beware of deep discharge when using it. Overdischarge (Overdischarge) If the battery exceeds the termination voltage of the battery during the discharge process, the internal pressure of the battery may increase when the battery is continuously discharged, and the reversibility of the positive and negative active materials will be damaged, which will make the battery capacity There is a distinct reduction. Overcharge (Overcharge) when the battery is charged, after reaching the overflow state, if it continues to be charged, it may cause the internal pressure of the battery to rise, the battery to deform, and the leakage at night, and the performance of the battery will also be significantly reduced and damaged. Energy density (Energydensity) The electric energy released by the uniform unit volume or mass of the battery. Generally, under the same volume, the energy density of a lithium battery is 2.5 times that of a nickel-cadmium battery and 1.8 times that of a nickel-hydrogen battery. Therefore, when the battery capacity is equal, the lithium battery will have a larger volume than nickel-cadmium and nickel-hydrogen batteries. Smaller and lighter. Self-discharge (Selfdischarge) batteries, regardless of whether they are used or not, due to various reasons, will cause the phenomenon of power loss. If calculated in a month, the self-discharge of lithium batteries is about 1%-2%, and the self-discharge of nickel-hydrogen batteries is about 3%-5%. Cyclelife (Cyclelife) rechargeable battery is used repeatedly to charge and discharge, the battery capacity gradually decreases to 60%-80% of the initial capacity. Memory effect (Memoryeffect) During the process of battery charging and discharging, many small bubbles will appear on the battery plate. Over time, these bubbles will reduce the area of u200bu200bthe battery plate and indirectly affect the battery capacity. 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: Introduction to the use of lithium batteries