Are Lithium-ion batteries safe

　　(1) Lithium battery is the most widely used battery, and the safety risk may be great. Acupuncture, short-circuit fault and extrusion molding will lead to short-circuit fault of lithium battery. Acupuncture or extrusion will lead to rupture of external diaphragm, resulting in a sudden rise in temperature, and eventually explosion accident. Especially for lithium batteries with weak safety factor, this time will be shorter, generally about 5 seconds of thermal shock, thermal shock refers to a sudden rise in the working temperature. If the temperature increases, the SEI film above the negative surface of the lithium-ion battery will dissolve, causing a chemical reaction. If the heat dissipation is not very good, the external temperature of the rechargeable battery will rise rapidly, and then it will explode

　　(2) If the battery charging current is too large, assuming that the lithium battery is overcharged, unnecessary electromagnetic energy will be converted into energy, which will lead to the temperature rise and damage of the rechargeable battery. In general, these problems can occur with charging heads or electronic devices that are not maintained by charging heads. So lithium ion batteries in general is environmentally friendly and safe, if you also want to make a contribution to environmental protection, then try to buy lithium ion batteries!

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