Why does lithium battery explode news constantly?

Why lithium batteries will explode in the news. The use of lithium batteries in daily life has suddenly expanded, mainly because of the widespread use of smart phones, wearable devices, electric bicycles and new energy vehicles. Over the years, there has been a lot of news about how to use batteries and lithium battery explosions, often containing misleading information. In this article, we start from the simple use of lithium batteries to the chaotic use, one by one. There are several important goals for measuring battery performance: 1. Charge and discharge rate: the higher the better, C is a special symbol describing the charge and discharge current of the battery. The discharge capacity of 1C represents the amount of current required to turn the battery from full to empty in one hour. The battery capacity of iPhone6 u200bu200bis 1810mAH, so the 1C discharge current of the battery is 1.81 amperes. The battery capacity of each battery used in BYD e6 electric car is 200 AH, so the 1C discharge current of the battery is 200 amperes. The battery should be discharged at a high power rate, generally releasing less energy than a low power rate. The discharge capacity at different discharge rates can be seen from the above test results. When the power battery is discharged at 10C and 1C, the energy release is 85%, and when it is discharged at 20C and 1C, the energy release is only 70%. Second, the number of charge and discharge cycles: the more the better, the general value of lithium batteries is 500 times, and the number of charge and discharge cycles for lithium batteries made of different materials ranges from 300 to 3000 times. The specific meaning of this value varies from factory to factory, and can be roughly understood as: charge and discharge rate (such as 1C discharge, 0.3c charge; each charge from 0% to 100%, after 500 cycles, the battery capacity remains at the initial 80%. The relationship between charging and discharging time and usage habits is too great. 1. The influence of charging and discharging intensity on the number of cycles Factory label: each time from 0% to 100%, from 1C to 0.3c, after 500 times, the output drops to 80%, this is the most serious test cycle, but it can’t be so serious. See below. Assume that each charge cycle is 25%-75%, discharge 1C, charge 0.3c, and the capacity decays to 80% after 2000 charges. Assuming each charge The cycle is 50%~100%, put 1C, charge 0.3, and the capacity will decrease to 80% after 1800 times. 2. The impact of shallow irrigation and shallow drainage on life. Factory label: each time from 0% to 100%, from 1C to 0.3c, After 500 times, the output drops to 80%. This is the most serious inspection cycle, but it can’t be so serious. See below. Each charge cycle is 25%-75%, put 1C, charge 0.3c, and the capacity drops to 80% after 2000 times. Charge 50%-100% per cycle, put 1C, charge 0.3, and the capacity drops to 80% after 1800 times. It can be seen that if the charge-discharge multiplier is smaller, it is more conducive to the increase of life; shallow supplementation is also conducive to long life. 3. Internal resistance: The less the better. This parameter changes with load weight, temperature and other factors. As the battery life decreases, the internal resistance gradually increases. The smaller the internal resistance, the higher the battery charge and discharge rate, 18650 The internal resistance of a general-purpose battery is about 50m, and the power of a 18650 battery is about 15 meters. You need to know how much the internal resistance needs to be measured with a special instrument, and a general multimeter can’t. The things to measure the internal resistance of the battery. Four. The higher the capacity, internal resistance and charge-discharge curve of the battery, the better. Whether the big battery plan forms a battery pack is very important. The larger the battery pack plan, the higher the requirements for homosexuality. The following pages will be arranged according to the ease of use: 1. Lithium batteries in mobile phones, tablets and wearable devices 2. Lithium batteries used in laptops and mobile power supplies Lithium batteries in electric bicycles Lithium batteries in electric bicycles Statement: Some pictures and content of articles published on this site are from On the Internet, if there is any infringement, please contact to delete the previous article: Five major cathode materials and important indicators of lithium batteries for electric vehicles