Take apart Tesla 18650 lithium-ion battery, and the surprisingly simple internal structure shock me a lot

18650 battery can be said to be the earliest lithium ion batteries, designed and developed by Japan SONY company, carried forward by Panasonic, Samsung. After more than 20 years development, the preparation technology is already very mature, battery performance also has a great improvement. Digital products in our life often can be seen the figure of it, such as mobile power supply, laptop batteries, etc. In recent years, as the wave of new energy vehicles of Tesla electric cars, 18650 battery is in people's sight again.

Tesla use Panasonic battery 18650

Panasonic and tesla cooperation model3 battery pack

Samsung batteries in 18650 batteries belong to better product quality, let's to take apart a Samsung 18650, by observing the simple internal structure to find out how it works.Reiterate: the author fault, audience can master to imitate, lest produce risk

The graph is Samsung 18650 battery, it seems that Panasonic is blue packaging, say the wrong mo

The battery is negative

18650 batteries, the most common shape is shown above, a similar number 5 batteries, but the volume is better than 5 batteries a circle.18650 standard specification first put forward by SONY, 18 mm in diameter, 65 mm in length, 0 means cylindrical battery, this also is the origin of the name, "18650", in safety, the positive position in battery will usually add buy a gray insulation slices

Middle of a small "parts", batteries, electrode for grey insulation slices

Batteries positive

External battery by the metal shell package, damaged shell can see batteries inside

The cathode of batteries,

Batteries as the cathode and anode has a blue plastic insulation gasket

We found it apart, cylindrical 18650 batteries use full metal jacket packages, can have very good protection to internal substance, but also good to prevent leakage.

Batteries inside, electrolyte membrane

Batteries inside as a roll of film, the design is the cathode respectively on both ends of the batteries, internal membrane is a kind of special molding of polymer film, film using microporous structure design, enables lithium ion free shuttle.

Connect the positive film

18650 batteries inside

Batteries anode

Connect battery anode film is mixed between a layer of white plastic film, film after soaking electrolyte, moist but not much moisture, volatile is a while you didn't have pungent smell (do not know to have poison, good afraid afraid).Internet access to "18650 batteries electrolyte commonly used within the six fluoride phosphate lithium carbonate lipid solvent, lithium from the electronic process of embedding and take off owe. The amount of embedded lithium ion, directly affect the size of the battery.

Batteries anode

Can we can found that 18650 batteries by: metal shell, the positive and negative, membrane and the electrolyte of five parts, they do their job, in order to ensure the normal charge and discharge.

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