How many 18650 batteries in a tesla.
Comparison of several types of positive electrode materials for energy storage lithium battery manufacturers: ternary materials have advantages, lithium iron phosphate is safe.
Firstly, to correct a concept, "lithium battery" is the abbreviation for what we generally refer to as "lithium-ion battery", while some people refer to "ferroelectric" as a type of lithium-ion battery that uses lithium iron phosphate as the positive electrode material.
Why does Tesla use Panasonic
18650 battery manufacturer?
OK, let's start answering now. First, let's talk about the simple version of the popular summary:
The Panasonic 18650 energy storage
lithium battery manufacturer used by Tesla uses NCA as the positive electrode and has designed a complex battery management system to ensure and improve the efficiency and safety of battery operation as much as possible. As for whether it is absolutely safe, it cannot be answered. If you want to say self ignition, I also want to say that gasoline cars also self ignite in summer.
What is our biggest concern when it comes to pure electric vehicles (excluding plug-in hybrid and pure hybrid, which can be driven on gasoline)? Range anxiety refers to not being able to drive far because the energy density stored in the battery is too low. After grouping car batteries, the energy density is generally only 100-150Wh/kg, while the value for gasoline is about 10000... Therefore, even if you carry a car battery like a turtle, it may not necessarily solve the problem. Everyone roast that the low energy density is the reason why electric cars run out of power when they are not far away from charging every day.
The biggest weakness of current battery technology is that its energy density is too low, lagging far behind Moore's Law of infinity... Don't talk about those lithium batteries, even if their energy density is not high enough, the key is that they are still far from practical use
So as for why we don't use lithium iron phosphate energy storage battery manufacturers, I would like to say that the main reason should be the low capacity (in Ah) and energy (in Wh, which is the product of Ah and voltage) (lithium iron phosphate has a slightly lower capacity and voltage than ternary batteries, only 3.4V, so the multiplied energy is even lower).
The actual car battery pack is composed of series and parallel connections, and series connection is needed to increase the voltage. At this time, the voltage of a single cell and the consistency of the capacity between different batteries are very important. It is not rigorous to just say that the capacity is low.
