3 common problems of 14500 lithium battery

1. 14500 purchase problem. The voltage of the lithium battery is (2.5V-4.2V). Overdischarge or overcharge will damage the battery. The battery can be protected by the addition of a protective plate. Because the 14500 battery with a protective plate is higher than the general No. 5 battery It is a few mm or so. Pay special attention to the fact that some cameras can’t be covered. The battery contacts of the camera can be affected, and the elasticity will decrease after a long time, which will cause poor contact. Since the protection circuit is automatically powered off at 2.5V, the camera will be powered off suddenly, which may cause damage to the camera. 2. The 14500 over-discharge problem does not bring the protection board. There are some details on the minimum voltage to pay attention to: *The voltage range of the camera, the general camera voltage is 2.4V to 4.2V, so the camera will often shut down when the voltage reaches 2.4V. The camera has Select the battery type selection (alkaline, nickel battery, lithium battery), the shutdown voltage is different for different battery types, but the shutdown voltage of the lithium battery is 2.5V after the power is cut off and please replenish the power in time. Causes over-discharge effects on the battery. 3. 14500 overcharge problem After the lithium battery cell is overcharged to a voltage higher than 4.2V, side uses will begin to appear. The higher the overcharge voltage, the higher the risk. After the voltage of the lithium battery cell is higher than 4.2V, the number of lithium atoms remaining in the positive electrode material is less than half. At this time, the cell often collapses, causing a permanent decrease in battery capacity. If the charge continues, since the storage cell of the negative electrode is already filled with lithium atoms, subsequent lithium metal will accumulate on the surface of the negative electrode material. These lithium atoms will grow dendrites from the surface of the negative electrode toward the direction of the lithium ions. These lithium metal crystals will pass through the separator paper and short-circuit the positive and negative electrodes. Sometimes the battery explodes before the short circuit occurs. This is because during the overcharging process, the electrolyte and other materials will crack and produce gas, causing the battery shell or pressure valve to swell and break, allowing oxygen to enter and react with the lithium atoms accumulated on the surface of the negative electrode. And then exploded. Therefore, when charging a lithium battery, the upper limit of the voltage must be set so that the battery's life, capacity, and safety can be taken into account at the same time. The most ideal upper limit of the charging voltage is 4.2V. There is also a lower voltage limit when discharging lithium batteries. When the cell voltage is lower than 2.5V, some materials will begin to be destroyed. And because the battery will self-discharge, the longer it is left, the lower the voltage will be. Therefore, it is best not to declare when discharging: 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: Introduction Basic knowledge of battery maintenance