Four taboos and charging matters for lithium-ion batteries

The first temperature, lithium-ion batteries are afraid of high temperatures. Long-term overheating will greatly reduce the life of lithium-ion batteries. In severe cases, the internal pressure will increase and cause an explosion. Even if there is no explosion, the lithium-ion battery will quickly be scrapped in high heat. Most of the reason is because of the working environment. Caused by the high temperature. The second largest current, such as the 18650 battery is 3C discharge, your electric car is 8000W, and the battery used is lower than the discharge current of your electric car, which will cause the lithium-ion battery temperature to be too high, the current is too large and the life is shortened , There will be bulging scraps. If your electric car is very powerful and fast, it is recommended to choose 18650 batteries with 10C current. It is obviously very important to choose the right batteries! The third full charge storage, the full charge of the ternary lithium-ion battery is 4.35V, and the current protection boards on the market are all 4.2V and stop charging, so many people buy lithium-ion batteries for electric vehicles and say that they have no nominal capacity. In fact, for this reason, it is generally best to store the lithium-ion battery of an electric car for a long time, and it is best to charge 50% of the TV. For example, when you buy a new mobile phone, most of it is 50% of the power when it is turned on. If the battery is fully charged and stored for a long time, the capacity of the lithium-ion battery will be reduced. Except for lithium iron phosphate and lithium titanate, these two types can be stored at full charge. It should also be noted that the protection board of better quality should be selected. The biggest taboo of lithium ion batteries is overshoot and overdischarge, ternary lithium ion The overshoot will be scrapped once, and the overshoot must be scrapped. The fourth suitable charging equipment, when charging and discharging, the current of the charger and the general current load of the electrical appliance must be within the specified range. Excessive current load can easily cause the internal short circuit of the battery, thereby destroying the lithium and triggering the circuit. Safety hazards. The same applies to the voltage of the rechargeable charger. So when we use the charger, we should also pay attention to see if the charger is qualified. What should I pay attention to when charging Li-ion batteries? 1. It is strictly forbidden to expose to high temperatures. The hot climate will not only cause heat stroke, but also heat stroke in electric vehicles. In the hot summer, if the electric car is exposed to the sun, the probability of lithium-ion battery scrap is very high, especially when the battery catches fire at high temperature, it is not uncommon, so we must prevent high temperature exposure. 2. High temperature charging should not be used many times. Everyone will charge the device directly outside after using it. The hot weather, coupled with the heat generated during charging, the combination of the two will cause the surface temperature of the power lithium-ion battery to be very high, which will burn the surface of the lithium-ion battery. The protective case even catches fire, so when charging, be sure to charge in a cool place and never charge at high temperature. 3. The short circuit of the circuit causes the charger to catch fire, which in turn causes the lithium-ion battery to catch fire and explode. Many people have the habit of carrying a lithium-ion battery charger with them. This can solve the problem of dead equipment, but the problem is that long-term turbulence is easy to cause The wires and components of the charger are open-welded, causing a short circuit and fire during charging. 4. Do not charge it immediately after use. Because of lack of maintenance knowledge, many people charge immediately after using the battery for the next use. In fact, this is not right. The temperature of the device is very high after the device operates in a high temperature state. At this time, if the battery is directly charged, the temperature of the battery will continue to increase, even exceeding the critical point, and eventually spontaneously ignite. 5. Remove the battery for charging. This method will basically not cause problems at ordinary temperatures, but when it is exposed to high temperatures or summer exposure, this charging method will leave a lot of hidden dangers. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete it.