Lithium battery: trustworthy?
time2017/01/07
ecently, the Samsung Galaxy Note7 in global overheating and even bombings,and later Samsung company announced the recall of its new Note7 phone and explained: "the company has conducted in-depth surveys,we found that the lithium-ion batteries installed in the cell phone existing problems.
Lithium battery since it’s birth, with its high performance and no memory effect and so on, and quickly occupied the handheld device market.
Lithium battery: trustworthy? What do you think about it?Lithium-ion batteries rely on lithium ions to move between anode and cathode to complete the transformation of chemical energy into electrical energy. It consists of positive and negative electrodes, the diaphragm, and the electrolyte.
When the battery is charging, the lithium ion generated on the anode of lithium-ion battery, and then it move to the cathode through the electrolyte. And as cathode carbon in a layered structure, it has a porous, the lithium ions to the cathode will be embedded in the micropores of the carbon layer, the more lithium ions, the higher the charging capacity. Similarly, when you discharge the battery (that is, we use the battery), embedded in the cathode, a lithium-ion of carbon layer removal and movement back to the anode. Back to the positive electrode of lithium-ion the higher the discharge capacity. We are commonly referred to as the battery capacity is discharge capacity. Therefore, it becomes the representative of high-performance batteries.
Lithium is a very active metal, air combustion, water will explode. In the production process of lithium ion batteries, in order to avoid positive and negative short-circuited by the electrolyte, divide positive and negative split is needed. Without increasing the volume of battery, many manufacturers based on improve the energy density of batteries use a thin diaphragm in order to store more energy in a limited volume. Thickness increases the difficulty of producing diaphragm, which easily lead to manufacturing defects, the diaphragm is not an effective isolation of polarity. Using inappropriate way to charge may cause overheating or physical shock after rupture and leakage, it can cause battery short circuit or explosion.