How to use lithium batteries safely?

How to use lithium batteries safely In the process of robot development, the use of lithium batteries cannot be prevented, and if the lithium batteries are used improperly, they will cause huge potential troubles and even lead to disasters, so I will use them safely here. Lithium batteries are summarized and shared with you. Note: The lithium battery mentioned here refers to the lithium battery pack used for model airplanes, racing cars or robots. They do not include lithium batteries for mobile phones or laptops. Take the lithium battery as an example. First of all, we need to know our lithium battery and what its detailed parameters are. Generally, lithium batteries processed by regular manufacturers will have detailed parameter information. If not, it is best to check the detailed parameters on the manufacturer's official website or customer service. Let us explain some important parameters below. The following are the parameters of the lithium battery pack: 2200 mAh at 25°C 11.1V-3s1p24.4Wh battery capacity 2200mAh represents battery capacity. The battery capacity is generally measured in milliamps. For example, 2200mAh means the battery is fully charged, and it can be stored for 1 hour when discharged at 2200mA. The discharge rate 25C is the maximum discharge point multiplier of the battery, that is, the maximum discharge current that the battery can reach is 25x2200mA. We know that the discharge current of the battery will change with the change of the load. 25C is the upper limit of the discharge current, not the normal discharge current. So it is best not to discharge frequently. The total rated voltage 11.1v is the total rated voltage of the lithium battery pack. One method of 3S1P means that the battery pack is composed of three lithium batteries (one 3.7v) connected in series and connected in parallel. Usually we call it 3S **Lithium Battery Pack**. Charging and discharging After knowing the parameters of the lithium battery, we should know how to charge it. By the way, here to correct a misunderstanding that many people may think that rechargeable batteries have a recall effect, so they must be fully discharged and charged for the first time. This only applies to nickel-cadmium batteries. Generally advocate partial discharge of lithium batteries rather than full discharge, if possible, try to prevent frequent full discharge. First of all, we have to buy a safety charger. Generally, a lithium battery pack (refers to multiple lithium batteries) must be a balanced charger manufactured by a regular manufacturer. This is because the balanced charger ensures that the voltages of multiple lithium batteries in the battery pack are basically the same when charging. Once the voltage of each battery in the lithium battery pack is very different, it is easy to damage the battery and even cause a fire or explosion. In addition, the charger is best to have on-time function and safety maintenance function, that is, when the battery voltage rises to the peak value, it starts to fall, it will turn off the charging current and end the charging. Here is a recommended charger iMaxB6AC balance charger. In order to prevent advertising suspicion, I will not detail it here. If you are interested, you can find materials by yourself. Note: Never buy cheap chargers for cheap, always remember safety first! If there are no professionals, never make your own charging equipment! Regarding lithium batteries, if the battery does not indicate that it can be charged at a high current rate, then It is best to charge with a current of u003cu003d1C (for example, a 2200mA lithium battery pack can be charged with a current of u003cu003d2.2a). If the battery is marked as being able to be charged at a high power such as 5C, it does not mean that it can be charged at 5C frequently. We should try our best to prevent charging at a high current. We need to know how to safely discharge lithium batteries. Generally speaking, lithium batteries should not be discharged. The purpose of discharging is to eliminate the remaining battery capacity, perhaps reducing the battery voltage to a specific value. When discharging, users should be as careful as charging. In order to prevent over-discharge, the correct cut-off discharge voltage must be set. Lithium batteries cannot be discharged below the minimum voltage, otherwise it will cause rapid energy loss or complete failure. If you want to discharge points, generally the discharge current of the main lithium battery pack should not exceed 3 times the battery capacity, and the discharge cut-off current of each battery is 3.0-3.3v. Safety skills In order to prevent the battery from short-circuiting when connected to the charging cable, please connect the charging cable to the charger first, and then connect the battery. When disconnecting the line, the procedure is reversed. 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: Points to note when discharging lithium batteries