Matters needing attention when charging lithium batteries for electric vehicles

Lithium batteries cannot be overcharged or overdischarged, so almost all lithium batteries are used with protection boards. However, due to the need for ultra-high power on model aircraft and plant protection drones, the protection of such batteries is usually through low-battery alarms. The form informs users that they need to return to charging to protect the battery from over-discharge. Conventional lithium batteries with a protective plate will basically not be overcharged and over-discharged during use. However, there are still some things to pay attention to during use. So as not to cause damage to the battery. Especially lithium batteries for electric vehicles are more expensive and costly to replace, so we should use them with care. (The picture comes from the Internet) Things to pay attention to when charging the lithium battery 1) When the lithium battery of an electric vehicle needs to be charged, we should first connect the battery to the charger, and then connect the charger to the mains to start charging. When the battery is fully charged, unplug the power first, then disconnect the battery and charger. At the same time, when installing lithium batteries in electric vehicles, keep the key door closed. The reason for connecting the battery and the charger first is that this can avoid the sparking phenomenon that occurs when the charger and the battery are connected. This phenomenon may have the risk of breakdown on the battery protection board (BMS) and the main body of the charger. Others are the same. 2) When the lithium battery of the electric vehicle is fully charged, disconnect the link with the charger in time, although the lithium battery charger itself has the function of stopping charging. 3) Do not charge in a sub-zero temperature environment. Charging below 0°C is not only unsatisfactory, but also accelerates the aging of lithium batteries. 4) When charging, you should use the exclusive lithium battery charger, not the roadside fast charging, and the 48 60 72 volt chargers cannot be mixed. 5) If the battery is found to be hot during charging, stop charging and use, and check the charger and battery in time. 6) The charger and battery should be far away from the bedroom, and the surrounding area should be free of combustible materials and kept dry. 1) Lithium batteries are afraid of cold and heat. Do not use in extreme environments. The migration rate of lithium ions in the electrolyte and electrode sheets is closely related to temperature. Theoretically, the temperature can be used normally between -20°C and 55°C. In daily life, the use temperature of lithium battery is between 5℃-35℃, and there is no harm to lithium battery. Users in the north should take the lithium battery home and store it in winter as much as possible. Do not put it outdoors. Users in the south should avoid exposure in summer. 2) Do not charge and discharge lithium batteries frequently. Unlike nickel-cadmium batteries and lead-acid batteries, lithium batteries do not have any memory effect and can be recharged anytime and anywhere. Charging the battery with residual power will not shorten the service life, but also It can maintain the battery and extend its recycling cycle. For lithium batteries, the correct way is to slowly charge instead of deep charge. Three) Use a suitable charger to avoid the chemical activity of high-current lithium batteries being much more active than lead-acid batteries. The requirements for chargers are higher. Once a brand-name charger or an unsuitable fast charger is used, not only It will affect the service life of the lithium battery itself, and in serious cases, it will explode due to the breakage and short circuit of the diaphragm caused by overheating. Four) Lithium batteries do not need to be activated, and do not need trickle charging. After purchasing lithium batteries, many users charge them for 10-12 hours in accordance with lead-acid batteries for the first time and try to activate the lithium batteries. In fact, lithium batteries do not need to be activated, which is normal. After charging and discharging several times, the lithium battery is automatically activated. In addition, some users are very superstitious of trickle charging. When using lead-acid batteries, it is true that longer charging time can be used for longer, but lithium batteries are completely unnecessary. Because the charger and the protection board are not allowed, after the charger detects that the lithium battery is fully charged, it will automatically cut off the current, and the lithium battery protection board does not allow the charger to continue to charge the battery, because the lithium battery will be very overcharged. Dangerous, it may explode and catch fire in severe cases. 5) It is not necessary to store the lithium battery of an electric vehicle with a full battery. When you buy it, it is usually 2-3 grids. There are very few fully charged batteries. Why? The main reason is that when lithium battery companies produce batteries, the risk of processing a small amount of electricity will be greatly reduced, and it is more suitable for transportation. In addition, the characteristics of the lithium battery itself are also about 30% of the electricity. The activity is appropriate and will not be too high. It’s not too low, so it’s more suitable for long-term storage. In addition, a long storage time when fully charged will reduce the capacity of the lithium battery. And it is also more dangerous. Finally, pay attention to these points. Your electric vehicle lithium 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: 2010-2020 China's electric bicycle lithium battery production analysis and forecast