We all know that the power lithium battery is the “heart” of the new energy electric vehicle. The energy source of a car is all derived from the “heart” power battery. The power battery is wrapped in a battery case, just like a “outer coat” outside the heart. Recently, I heard people say that the battery case is toxic. Today, the Yalu mobile battery aluminum shell experts came to analyze for you: 

Is the battery case toxic?

Electrochemical reaction type of lithium ion battery: This reversible reaction method of lithium ion battery is a cradle reaction. Lithium ion Li+ runs from the positive electrode through the diaphragm to the negative electrode during charging. Discharge is the opposite. This “swing” forms the basic mechanism of a rechargeable lithium-ion battery.

A lithium-ion battery is a rechargeable battery that relies on lithium ions to move between the positive and negative electrodes to work. During charge and discharge, Li+ is intercalated and deintercalated between the two electrodes: when charging the battery, Li+ is deintercalated from the positive electrode, and the electrolyte is embedded in the negative electrode, and the negative electrode is in a lithium-rich state; A battery containing a lithium element as a electrode is generally used. It is representative of modern high performance batteries.

Lithium-ion batteries have high energy density and high average output voltage. Self-discharge is small, good battery, less than 2% per month (recoverable). There is no memory effect. The operating temperature range is -20 ° C ~ 60 ° C. Excellent cycle performance, fast charge and discharge, charging efficiency up to 100%, and high output power. long lasting. It does not contain toxic or hazardous substances and is called a green battery.

“Lithium-ion batteries and lithium batteries are strictly different in concept.” Wang Fang, chief of the battery technology field of the China Automotive Technology and Research Center, and senior engineer of the battery testing and application technology alliance, said that lithium batteries usually refer to lithium. A metal or lithium alloy is a negative electrode, and a battery using a nonaqueous electrolyte. A lithium ion battery refers to a rechargeable secondary battery, and the negative electrode does not use metallic lithium, and relies on lithium ions to move between the positive and negative electrodes to work. However, in daily life, people are used to abbreviating lithium-ion batteries as lithium batteries or lithium batteries.

As far as “Lithium battery poisoning is said”, one researcher-level senior engineer of the 18th Research Institute of Electronic Technology, said that the lithium-ion battery itself does not contain highly toxic substances, and the carbon of the negative electrode and the metal oxide of the positive electrode are basically non-toxic. Since lithium-ion batteries are a sealed system, they are not exposed to normal use. “In any case, its impact is much smaller than the most widely used lead-acid batteries.”

Compared with traditional batteries such as lead acid, nickel chromium, and nickel hydrogen, lithium batteries do not produce any toxic and harmful heavy metal elements and substances such as lead, mercury, cadmium, etc., and have relatively little pollution. The electrolyte is an organic solvent and a lithium salt, and most of them are non-toxic or low-toxic; however, the lithium battery decomposition or hydrolysis product is hydrofluoric acid and other fluorine-containing compounds, which have certain corrosiveness and toxicity.

It can be seen that the battery casing is non-toxic, the toxic is the battery, but not all batteries are toxic, lithium-ion battery is a non-toxic battery that is relatively environmentally friendly.