Note 7 blaster or radical LG Chemical may take over the supply of S8 battery

Since the first explosion of Samsung Galaxy note 7 cell phone battery in September this year, there have been various explanations and guesses about the cause of the explosion Another explanation is given in a survey report recently released by the third party instrument: when the mobile phone battery is charged and discharged, the chemical reaction will cause the lithium to dissociate and the battery will expand mechanically Therefore, when making batteries, some space should be reserved for such expansion, usually the distance is 10% of the thickness of the battery Samsung note 7 doesn't reserve this space There is a fire extinguisher beside the workbench of the disassembled note 7 mobile phone Photo source: working principle of lithium battery: lithium is the smallest diameter metal element on the chemical periodic table Due to its active chemical properties, lithium metal will react violently with oxygen when exposed to air In order to improve the safety and voltage, the scientists used graphite and lithium cobaltite, lithium iron phosphate, lithium manganate and other materials to store lithium The lithium battery is mainly composed of anode, cathode, electrolyte and separation layer There are positive and negative electrons in the two stages respectively Between them are chemicals called electrolytes, which can help the ions move and conduct current The separation layer allows the ions and electric energy to flow between the positive and negative stages without the two-stage contact Note 7 was not designed to leave enough room for battery expansion Photo source: the separation layer of the instrument directly affects the safety of the battery The two electrodes of the lithium battery cannot be directly contacted If the positive and negative two-stage contact, the energy flow will directly enter the electrolyte and heat it, resulting in more energy flow and heat generation, and in some cases, explosion The separation layer of note 7 lithium battery is a positive layer made of lithium cobalt oxide, a negative layer made of graphite and two separation layers made of high polymer and impregnated with electrolyte It directly affects the internal resistance, interface structure, capacity, cycle performance and safety of note 7 battery Samsung has yet to comment publicly on instrument analysis Photo source: news.hiapk.com doesn't leave room for batteries In recent years, consumers have asked mobile phones to maintain a small and compact body while improving their endurance Many manufacturers have chosen to increase the energy density of batteries However, the energy density of the battery has entered a bottleneck period To further improve, there must be some trade-offs, such as the space occupied by extrusion auxiliary materials However, in the process of high-power charging and discharging, the local temperature of lithium battery rises rapidly, and the mechanical expansion degree of battery will be greater than usual Note 7 did not make enough space for this, and the polymer isolation layer was squeezed by extra pressure, resulting in the contact between the positive layer and the negative layer, and finally overheated and exploded Tesla also purchases batteries from LG Chem Photo source: Sina Technology LG Chem may supply batteries for Galaxy S8 Because of hardware design and battery problems, Samsung is considering replacing the battery supplier of the next flagship Galaxy S8 Rival LG Chem may take over Now the cooperation between the two companies is under discussion Samsung SDI and China new energy technology company are the current battery suppliers of Samsung, but after the large-scale recall of mobile phones, Samsung wants to diversify its battery suppliers.