At present, the lithium ion battery cathode material widely used for ultra low temperature batteries is lithium cobalt acid, and lithium cobalt acid lithium theoretical gram capacity is 270mAh/g, but the actual capacity can only play the capacity of 135-140mAh/g, too much play will destroy the material structure. If some accidents occur, for example, the lithium ion battery cathode material widely used in the management system is lithium cobalt acid, and lithium cobalt acid lithium theoretical gram capacity is 270mAh/g, but the actual capacity can only play the capacity of 135-140mAh/g, too much play will destroy the material structure. If some accidents occur, for example, the battery charge voltage is too high for the damage of the management system, the remaining part of the lithium in the cathode will be removed, the electrolyte is deposited on the surface of the negative electrode and deposited in the form of lithium metal, while the surface electrodeposition of the metal lithium is prone to form the "dendrite", which will pierce the septum, short the positive and negative poles and lead to the battery. A rapid fever caused a safety accident. The overcharge of the battery will also cause the positive electrode to accelerate the oxidation of the electrolyte when the voltage is high, and the heat and gas generated will cause the battery to run out of control. Overheating in the battery will accelerate the reaction of lithium cobaltate.

The internal temperature of the battery can instantly exceed 150 degrees, the diaphragm is melted, the positive and negative electrodes are directly short circuited, and the battery burns and explode. In the battery manufacturing process, if other metal impurities are mixed into the battery, it will easily lead to partial overheating in the battery charging and discharging process, thus causing safety problems. The battery charge voltage is too high, the remaining part of the lithium in the cathode will be removed. The electrolyte is deposited on the surface of the negative electrode and deposited in the form of lithium metal. The surface electrodeposition of the metal lithium is prone to form the "dendrite", which will pierce the diaphragm, short the positive and negative poles, cause the fast heating of the battery, and cause safety accidents. The overcharge of the battery will also cause the positive electrode to accelerate the oxidation of the electrolyte when the voltage is high, and the heat and gas generated will cause the battery to run out of control. The internal heat of the battery will accelerate the reaction of lithium cobaltate. The internal temperature of the battery can exceed 150 degrees C, the diaphragm is melted, the positive and negative pole is directly short circuited and the battery is burning and exploding. In the battery manufacturing process, if other metal impurities are mixed into the battery, it will easily lead to partial overheating in the battery charging and discharging process, thus causing safety problems.


Solution to the safety of lithium ion batteries


Although lithium ion battery has security problems, because of its superiority, there are no other kinds of batteries to replace. Various lithium-ion battery companies have also strengthened their safety control, mainly in the following areas: replacing lithium cobalt with new positive materials in the areas of higher safety requirements (such as lithium manganese dioxide, lithium iron phosphate, three yuan system, etc.)


The following are the preventive measures used for the bloomer battery:


Adopt a more rigorous way to control the production environment and product quality;


Formulate more detailed and strict industry and enterprise standards;


The development of new electrolyte additives, diaphragm, negative electrode materials and so on;


Strengthen battery protection system control to prevent battery overcharge.


Bloomer has always believed that the problem is not detected, especially on the security, and bloomer will start from the source, and do a good job of every battery!