background
According Elelectrek, Tesla is accelerating production for battery research and development, has acquired a battery manufacturing company in Canada, "Hibar Systems" (hereinafter referred to as "sea tyrants"). The amount of the acquisition were not disclosed.
Seen in this light Tesla ambition since the inquiry or battery - the battery is one of the core competencies of electric vehicles and the cost, if they are not involved, the core technology / outflow data, car prices will lose the right to speak, to become a vassal of the battery business . For car prices, strengthen the control of the battery industry chain, it can also help control the production expenses, to create a density in areas such as better battery products.
Cell principle
The basic elements constituting the battery: an anode, a cathode and an electrolyte
- Anode: electrons are removed through an external circuit, the electrode itself an oxidation reaction.
- Cathode: Electronic obtained through an external circuit, the occurrence of the reduction reaction to the electrode itself.
- Electrolyte: providing ions from one electrode to the other electrode of the battery inside the migration path.
Electrode active material may be a gas, liquid or solid electrolyte may be liquid or solid
Tesla battery technology
Battery 18650
18650 is a lithium-ion battery originator - SONY Corporation of Japan then set to save costs of a standard lithium ion battery type, wherein 18 indicates a diameter of 18mm, 65 denotes a length of 65mm, 0 is represented as a cylindrical battery.
18650 into common lithium ion batteries, lithium iron phosphate battery. Lithium-ion battery voltage of nominal voltage 3.7V, the charge-cutoff voltage of 4.2V, lithium iron phosphate nominal voltage of 3.2V, the discharge cutoff voltage was 3.6V, capacity 1200mAh-3350mAh is typically common capacity 2200mAh-2600mAh .
18650 Small monomer capacity (generally not more than 3Ah), would be much desired number of monomers (Roadster articulate 6831), it is well consistency; laminated battery capacity can be made larger (even 30Ah 40Ah ), you can reduce the number of monomers, but poor consistency.
21700 lithium battery
20700 battery (diameter 20mm, height 70mm) produced by Matsushita, the target market for electric mountain bike. 20700 before the battery is reported to be used in the manufacture Tesla Model 3 cars, Tesla CEO Elon Musk described later explained, has changed the size of the battery, and ultimately determine a diameter of 21mm and height of 70mm battery. They also put behind the numbers "0" removed, for determining cell manufacturing automobile Model 3 is "21-70" battery.
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